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6403 lines
212 KiB
6403 lines
212 KiB
/* |
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* copyright (c) 2001 Fabrice Bellard |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_AVCODEC_H |
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#define AVCODEC_AVCODEC_H |
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/** |
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* @file |
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* @ingroup libavc |
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* Libavcodec external API header |
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*/ |
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#include <errno.h> |
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#include "libavutil/samplefmt.h" |
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#include "libavutil/attributes.h" |
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#include "libavutil/avutil.h" |
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#include "libavutil/buffer.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/dict.h" |
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#include "libavutil/frame.h" |
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#include "libavutil/log.h" |
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#include "libavutil/pixfmt.h" |
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#include "libavutil/rational.h" |
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|
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#include "version.h" |
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/** |
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* @defgroup libavc libavcodec |
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* Encoding/Decoding Library |
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* |
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* @{ |
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* |
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* @defgroup lavc_decoding Decoding |
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* @{ |
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* @} |
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* |
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* @defgroup lavc_encoding Encoding |
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* @{ |
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* @} |
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* |
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* @defgroup lavc_codec Codecs |
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* @{ |
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* @defgroup lavc_codec_native Native Codecs |
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* @{ |
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* @} |
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* @defgroup lavc_codec_wrappers External library wrappers |
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* @{ |
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* @} |
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* @defgroup lavc_codec_hwaccel Hardware Accelerators bridge |
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* @{ |
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* @} |
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* @} |
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* @defgroup lavc_internal Internal |
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* @{ |
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* @} |
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* @} |
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*/ |
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/** |
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* @ingroup libavc |
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* @defgroup lavc_encdec send/receive encoding and decoding API overview |
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* @{ |
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* |
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* The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/ |
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* avcodec_receive_packet() functions provide an encode/decode API, which |
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* decouples input and output. |
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* |
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* The API is very similar for encoding/decoding and audio/video, and works as |
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* follows: |
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* - Set up and open the AVCodecContext as usual. |
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* - Send valid input: |
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* - For decoding, call avcodec_send_packet() to give the decoder raw |
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* compressed data in an AVPacket. |
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* - For encoding, call avcodec_send_frame() to give the encoder an AVFrame |
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* containing uncompressed audio or video. |
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* In both cases, it is recommended that AVPackets and AVFrames are |
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* refcounted, or libavcodec might have to copy the input data. (libavformat |
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* always returns refcounted AVPackets, and av_frame_get_buffer() allocates |
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* refcounted AVFrames.) |
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* - Receive output in a loop. Periodically call one of the avcodec_receive_*() |
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* functions and process their output: |
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* - For decoding, call avcodec_receive_frame(). On success, it will return |
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* an AVFrame containing uncompressed audio or video data. |
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* - For encoding, call avcodec_receive_packet(). On success, it will return |
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* an AVPacket with a compressed frame. |
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* Repeat this call until it returns AVERROR(EAGAIN) or an error. The |
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* AVERROR(EAGAIN) return value means that new input data is required to |
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* return new output. In this case, continue with sending input. For each |
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* input frame/packet, the codec will typically return 1 output frame/packet, |
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* but it can also be 0 or more than 1. |
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* |
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* At the beginning of decoding or encoding, the codec might accept multiple |
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* input frames/packets without returning a frame, until its internal buffers |
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* are filled. This situation is handled transparently if you follow the steps |
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* outlined above. |
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* |
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* In theory, sending input can result in EAGAIN - this should happen only if |
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* not all output was received. You can use this to structure alternative decode |
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* or encode loops other than the one suggested above. For example, you could |
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* try sending new input on each iteration, and try to receive output if that |
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* returns EAGAIN. |
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* |
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* End of stream situations. These require "flushing" (aka draining) the codec, |
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* as the codec might buffer multiple frames or packets internally for |
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* performance or out of necessity (consider B-frames). |
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* This is handled as follows: |
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* - Instead of valid input, send NULL to the avcodec_send_packet() (decoding) |
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* or avcodec_send_frame() (encoding) functions. This will enter draining |
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* mode. |
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* - Call avcodec_receive_frame() (decoding) or avcodec_receive_packet() |
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* (encoding) in a loop until AVERROR_EOF is returned. The functions will |
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* not return AVERROR(EAGAIN), unless you forgot to enter draining mode. |
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* - Before decoding can be resumed again, the codec has to be reset with |
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* avcodec_flush_buffers(). |
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* |
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* Using the API as outlined above is highly recommended. But it is also |
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* possible to call functions outside of this rigid schema. For example, you can |
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* call avcodec_send_packet() repeatedly without calling |
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* avcodec_receive_frame(). In this case, avcodec_send_packet() will succeed |
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* until the codec's internal buffer has been filled up (which is typically of |
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* size 1 per output frame, after initial input), and then reject input with |
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* AVERROR(EAGAIN). Once it starts rejecting input, you have no choice but to |
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* read at least some output. |
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* |
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* Not all codecs will follow a rigid and predictable dataflow; the only |
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* guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on |
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* one end implies that a receive/send call on the other end will succeed, or |
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* at least will not fail with AVERROR(EAGAIN). In general, no codec will |
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* permit unlimited buffering of input or output. |
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* |
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* This API replaces the following legacy functions: |
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* - avcodec_decode_video2() and avcodec_decode_audio4(): |
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* Use avcodec_send_packet() to feed input to the decoder, then use |
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* avcodec_receive_frame() to receive decoded frames after each packet. |
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* Unlike with the old video decoding API, multiple frames might result from |
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* a packet. For audio, splitting the input packet into frames by partially |
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* decoding packets becomes transparent to the API user. You never need to |
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* feed an AVPacket to the API twice (unless it is rejected with AVERROR(EAGAIN) - then |
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* no data was read from the packet). |
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* Additionally, sending a flush/draining packet is required only once. |
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* - avcodec_encode_video2()/avcodec_encode_audio2(): |
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* Use avcodec_send_frame() to feed input to the encoder, then use |
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* avcodec_receive_packet() to receive encoded packets. |
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* Providing user-allocated buffers for avcodec_receive_packet() is not |
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* possible. |
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* - The new API does not handle subtitles yet. |
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* |
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* Mixing new and old function calls on the same AVCodecContext is not allowed, |
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* and will result in undefined behavior. |
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* |
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* Some codecs might require using the new API; using the old API will return |
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* an error when calling it. All codecs support the new API. |
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* |
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* A codec is not allowed to return AVERROR(EAGAIN) for both sending and receiving. This |
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* would be an invalid state, which could put the codec user into an endless |
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* loop. The API has no concept of time either: it cannot happen that trying to |
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* do avcodec_send_packet() results in AVERROR(EAGAIN), but a repeated call 1 second |
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* later accepts the packet (with no other receive/flush API calls involved). |
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* The API is a strict state machine, and the passage of time is not supposed |
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* to influence it. Some timing-dependent behavior might still be deemed |
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* acceptable in certain cases. But it must never result in both send/receive |
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* returning EAGAIN at the same time at any point. It must also absolutely be |
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* avoided that the current state is "unstable" and can "flip-flop" between |
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* the send/receive APIs allowing progress. For example, it's not allowed that |
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* the codec randomly decides that it actually wants to consume a packet now |
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* instead of returning a frame, after it just returned AVERROR(EAGAIN) on an |
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* avcodec_send_packet() call. |
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* @} |
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*/ |
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/** |
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* @defgroup lavc_core Core functions/structures. |
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* @ingroup libavc |
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* |
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* Basic definitions, functions for querying libavcodec capabilities, |
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* allocating core structures, etc. |
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* @{ |
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*/ |
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/** |
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* Identify the syntax and semantics of the bitstream. |
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* The principle is roughly: |
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* Two decoders with the same ID can decode the same streams. |
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* Two encoders with the same ID can encode compatible streams. |
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* There may be slight deviations from the principle due to implementation |
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* details. |
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* |
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* If you add a codec ID to this list, add it so that |
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* 1. no value of an existing codec ID changes (that would break ABI), |
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* 2. it is as close as possible to similar codecs |
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* |
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* After adding new codec IDs, do not forget to add an entry to the codec |
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* descriptor list and bump libavcodec minor version. |
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*/ |
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enum AVCodecID { |
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AV_CODEC_ID_NONE, |
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/* video codecs */ |
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AV_CODEC_ID_MPEG1VIDEO, |
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AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding |
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#if FF_API_XVMC |
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AV_CODEC_ID_MPEG2VIDEO_XVMC, |
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#endif /* FF_API_XVMC */ |
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AV_CODEC_ID_H261, |
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AV_CODEC_ID_H263, |
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AV_CODEC_ID_RV10, |
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AV_CODEC_ID_RV20, |
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AV_CODEC_ID_MJPEG, |
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AV_CODEC_ID_MJPEGB, |
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AV_CODEC_ID_LJPEG, |
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AV_CODEC_ID_SP5X, |
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AV_CODEC_ID_JPEGLS, |
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AV_CODEC_ID_MPEG4, |
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AV_CODEC_ID_RAWVIDEO, |
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AV_CODEC_ID_MSMPEG4V1, |
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AV_CODEC_ID_MSMPEG4V2, |
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AV_CODEC_ID_MSMPEG4V3, |
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AV_CODEC_ID_WMV1, |
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AV_CODEC_ID_WMV2, |
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AV_CODEC_ID_H263P, |
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AV_CODEC_ID_H263I, |
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AV_CODEC_ID_FLV1, |
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AV_CODEC_ID_SVQ1, |
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AV_CODEC_ID_SVQ3, |
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AV_CODEC_ID_DVVIDEO, |
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AV_CODEC_ID_HUFFYUV, |
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AV_CODEC_ID_CYUV, |
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AV_CODEC_ID_H264, |
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AV_CODEC_ID_INDEO3, |
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AV_CODEC_ID_VP3, |
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AV_CODEC_ID_THEORA, |
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AV_CODEC_ID_ASV1, |
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AV_CODEC_ID_ASV2, |
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AV_CODEC_ID_FFV1, |
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AV_CODEC_ID_4XM, |
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AV_CODEC_ID_VCR1, |
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AV_CODEC_ID_CLJR, |
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AV_CODEC_ID_MDEC, |
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AV_CODEC_ID_ROQ, |
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AV_CODEC_ID_INTERPLAY_VIDEO, |
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AV_CODEC_ID_XAN_WC3, |
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AV_CODEC_ID_XAN_WC4, |
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AV_CODEC_ID_RPZA, |
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AV_CODEC_ID_CINEPAK, |
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AV_CODEC_ID_WS_VQA, |
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AV_CODEC_ID_MSRLE, |
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AV_CODEC_ID_MSVIDEO1, |
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AV_CODEC_ID_IDCIN, |
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AV_CODEC_ID_8BPS, |
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AV_CODEC_ID_SMC, |
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AV_CODEC_ID_FLIC, |
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AV_CODEC_ID_TRUEMOTION1, |
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AV_CODEC_ID_VMDVIDEO, |
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AV_CODEC_ID_MSZH, |
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AV_CODEC_ID_ZLIB, |
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AV_CODEC_ID_QTRLE, |
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AV_CODEC_ID_TSCC, |
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AV_CODEC_ID_ULTI, |
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AV_CODEC_ID_QDRAW, |
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AV_CODEC_ID_VIXL, |
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AV_CODEC_ID_QPEG, |
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AV_CODEC_ID_PNG, |
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AV_CODEC_ID_PPM, |
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AV_CODEC_ID_PBM, |
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AV_CODEC_ID_PGM, |
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AV_CODEC_ID_PGMYUV, |
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AV_CODEC_ID_PAM, |
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AV_CODEC_ID_FFVHUFF, |
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AV_CODEC_ID_RV30, |
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AV_CODEC_ID_RV40, |
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AV_CODEC_ID_VC1, |
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AV_CODEC_ID_WMV3, |
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AV_CODEC_ID_LOCO, |
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AV_CODEC_ID_WNV1, |
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AV_CODEC_ID_AASC, |
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AV_CODEC_ID_INDEO2, |
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AV_CODEC_ID_FRAPS, |
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AV_CODEC_ID_TRUEMOTION2, |
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AV_CODEC_ID_BMP, |
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AV_CODEC_ID_CSCD, |
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AV_CODEC_ID_MMVIDEO, |
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AV_CODEC_ID_ZMBV, |
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AV_CODEC_ID_AVS, |
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AV_CODEC_ID_SMACKVIDEO, |
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AV_CODEC_ID_NUV, |
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AV_CODEC_ID_KMVC, |
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AV_CODEC_ID_FLASHSV, |
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AV_CODEC_ID_CAVS, |
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AV_CODEC_ID_JPEG2000, |
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AV_CODEC_ID_VMNC, |
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AV_CODEC_ID_VP5, |
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AV_CODEC_ID_VP6, |
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AV_CODEC_ID_VP6F, |
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AV_CODEC_ID_TARGA, |
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AV_CODEC_ID_DSICINVIDEO, |
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AV_CODEC_ID_TIERTEXSEQVIDEO, |
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AV_CODEC_ID_TIFF, |
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AV_CODEC_ID_GIF, |
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AV_CODEC_ID_DXA, |
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AV_CODEC_ID_DNXHD, |
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AV_CODEC_ID_THP, |
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AV_CODEC_ID_SGI, |
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AV_CODEC_ID_C93, |
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AV_CODEC_ID_BETHSOFTVID, |
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AV_CODEC_ID_PTX, |
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AV_CODEC_ID_TXD, |
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AV_CODEC_ID_VP6A, |
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AV_CODEC_ID_AMV, |
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AV_CODEC_ID_VB, |
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AV_CODEC_ID_PCX, |
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AV_CODEC_ID_SUNRAST, |
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AV_CODEC_ID_INDEO4, |
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AV_CODEC_ID_INDEO5, |
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AV_CODEC_ID_MIMIC, |
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AV_CODEC_ID_RL2, |
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AV_CODEC_ID_ESCAPE124, |
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AV_CODEC_ID_DIRAC, |
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AV_CODEC_ID_BFI, |
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AV_CODEC_ID_CMV, |
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AV_CODEC_ID_MOTIONPIXELS, |
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AV_CODEC_ID_TGV, |
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AV_CODEC_ID_TGQ, |
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AV_CODEC_ID_TQI, |
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AV_CODEC_ID_AURA, |
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AV_CODEC_ID_AURA2, |
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AV_CODEC_ID_V210X, |
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AV_CODEC_ID_TMV, |
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AV_CODEC_ID_V210, |
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AV_CODEC_ID_DPX, |
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AV_CODEC_ID_MAD, |
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AV_CODEC_ID_FRWU, |
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AV_CODEC_ID_FLASHSV2, |
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AV_CODEC_ID_CDGRAPHICS, |
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AV_CODEC_ID_R210, |
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AV_CODEC_ID_ANM, |
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AV_CODEC_ID_BINKVIDEO, |
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AV_CODEC_ID_IFF_ILBM, |
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#define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM |
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AV_CODEC_ID_KGV1, |
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AV_CODEC_ID_YOP, |
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AV_CODEC_ID_VP8, |
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AV_CODEC_ID_PICTOR, |
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AV_CODEC_ID_ANSI, |
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AV_CODEC_ID_A64_MULTI, |
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AV_CODEC_ID_A64_MULTI5, |
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AV_CODEC_ID_R10K, |
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AV_CODEC_ID_MXPEG, |
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AV_CODEC_ID_LAGARITH, |
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AV_CODEC_ID_PRORES, |
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AV_CODEC_ID_JV, |
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AV_CODEC_ID_DFA, |
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AV_CODEC_ID_WMV3IMAGE, |
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AV_CODEC_ID_VC1IMAGE, |
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AV_CODEC_ID_UTVIDEO, |
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AV_CODEC_ID_BMV_VIDEO, |
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AV_CODEC_ID_VBLE, |
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AV_CODEC_ID_DXTORY, |
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AV_CODEC_ID_V410, |
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AV_CODEC_ID_XWD, |
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AV_CODEC_ID_CDXL, |
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AV_CODEC_ID_XBM, |
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AV_CODEC_ID_ZEROCODEC, |
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AV_CODEC_ID_MSS1, |
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AV_CODEC_ID_MSA1, |
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AV_CODEC_ID_TSCC2, |
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AV_CODEC_ID_MTS2, |
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AV_CODEC_ID_CLLC, |
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AV_CODEC_ID_MSS2, |
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AV_CODEC_ID_VP9, |
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AV_CODEC_ID_AIC, |
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AV_CODEC_ID_ESCAPE130, |
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AV_CODEC_ID_G2M, |
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AV_CODEC_ID_WEBP, |
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AV_CODEC_ID_HNM4_VIDEO, |
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AV_CODEC_ID_HEVC, |
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#define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC |
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AV_CODEC_ID_FIC, |
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AV_CODEC_ID_ALIAS_PIX, |
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AV_CODEC_ID_BRENDER_PIX, |
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AV_CODEC_ID_PAF_VIDEO, |
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AV_CODEC_ID_EXR, |
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AV_CODEC_ID_VP7, |
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AV_CODEC_ID_SANM, |
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AV_CODEC_ID_SGIRLE, |
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AV_CODEC_ID_MVC1, |
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AV_CODEC_ID_MVC2, |
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AV_CODEC_ID_HQX, |
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AV_CODEC_ID_TDSC, |
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AV_CODEC_ID_HQ_HQA, |
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AV_CODEC_ID_HAP, |
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AV_CODEC_ID_DDS, |
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AV_CODEC_ID_DXV, |
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AV_CODEC_ID_SCREENPRESSO, |
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AV_CODEC_ID_RSCC, |
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|
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AV_CODEC_ID_Y41P = 0x8000, |
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AV_CODEC_ID_AVRP, |
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AV_CODEC_ID_012V, |
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AV_CODEC_ID_AVUI, |
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AV_CODEC_ID_AYUV, |
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AV_CODEC_ID_TARGA_Y216, |
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AV_CODEC_ID_V308, |
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AV_CODEC_ID_V408, |
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AV_CODEC_ID_YUV4, |
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AV_CODEC_ID_AVRN, |
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AV_CODEC_ID_CPIA, |
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AV_CODEC_ID_XFACE, |
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AV_CODEC_ID_SNOW, |
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AV_CODEC_ID_SMVJPEG, |
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AV_CODEC_ID_APNG, |
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AV_CODEC_ID_DAALA, |
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AV_CODEC_ID_CFHD, |
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AV_CODEC_ID_TRUEMOTION2RT, |
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AV_CODEC_ID_M101, |
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AV_CODEC_ID_MAGICYUV, |
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AV_CODEC_ID_SHEERVIDEO, |
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AV_CODEC_ID_YLC, |
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AV_CODEC_ID_PSD, |
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AV_CODEC_ID_PIXLET, |
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AV_CODEC_ID_SPEEDHQ, |
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AV_CODEC_ID_FMVC, |
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AV_CODEC_ID_SCPR, |
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AV_CODEC_ID_CLEARVIDEO, |
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AV_CODEC_ID_XPM, |
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AV_CODEC_ID_AV1, |
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AV_CODEC_ID_BITPACKED, |
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AV_CODEC_ID_MSCC, |
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AV_CODEC_ID_SRGC, |
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AV_CODEC_ID_SVG, |
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AV_CODEC_ID_GDV, |
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AV_CODEC_ID_FITS, |
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|
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/* various PCM "codecs" */ |
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AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs |
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AV_CODEC_ID_PCM_S16LE = 0x10000, |
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AV_CODEC_ID_PCM_S16BE, |
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AV_CODEC_ID_PCM_U16LE, |
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AV_CODEC_ID_PCM_U16BE, |
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AV_CODEC_ID_PCM_S8, |
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AV_CODEC_ID_PCM_U8, |
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AV_CODEC_ID_PCM_MULAW, |
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AV_CODEC_ID_PCM_ALAW, |
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AV_CODEC_ID_PCM_S32LE, |
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AV_CODEC_ID_PCM_S32BE, |
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AV_CODEC_ID_PCM_U32LE, |
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AV_CODEC_ID_PCM_U32BE, |
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AV_CODEC_ID_PCM_S24LE, |
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AV_CODEC_ID_PCM_S24BE, |
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AV_CODEC_ID_PCM_U24LE, |
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AV_CODEC_ID_PCM_U24BE, |
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AV_CODEC_ID_PCM_S24DAUD, |
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AV_CODEC_ID_PCM_ZORK, |
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AV_CODEC_ID_PCM_S16LE_PLANAR, |
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AV_CODEC_ID_PCM_DVD, |
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AV_CODEC_ID_PCM_F32BE, |
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AV_CODEC_ID_PCM_F32LE, |
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AV_CODEC_ID_PCM_F64BE, |
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AV_CODEC_ID_PCM_F64LE, |
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AV_CODEC_ID_PCM_BLURAY, |
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AV_CODEC_ID_PCM_LXF, |
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AV_CODEC_ID_S302M, |
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AV_CODEC_ID_PCM_S8_PLANAR, |
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AV_CODEC_ID_PCM_S24LE_PLANAR, |
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AV_CODEC_ID_PCM_S32LE_PLANAR, |
|
AV_CODEC_ID_PCM_S16BE_PLANAR, |
|
|
|
AV_CODEC_ID_PCM_S64LE = 0x10800, |
|
AV_CODEC_ID_PCM_S64BE, |
|
AV_CODEC_ID_PCM_F16LE, |
|
AV_CODEC_ID_PCM_F24LE, |
|
|
|
/* various ADPCM codecs */ |
|
AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, |
|
AV_CODEC_ID_ADPCM_IMA_WAV, |
|
AV_CODEC_ID_ADPCM_IMA_DK3, |
|
AV_CODEC_ID_ADPCM_IMA_DK4, |
|
AV_CODEC_ID_ADPCM_IMA_WS, |
|
AV_CODEC_ID_ADPCM_IMA_SMJPEG, |
|
AV_CODEC_ID_ADPCM_MS, |
|
AV_CODEC_ID_ADPCM_4XM, |
|
AV_CODEC_ID_ADPCM_XA, |
|
AV_CODEC_ID_ADPCM_ADX, |
|
AV_CODEC_ID_ADPCM_EA, |
|
AV_CODEC_ID_ADPCM_G726, |
|
AV_CODEC_ID_ADPCM_CT, |
|
AV_CODEC_ID_ADPCM_SWF, |
|
AV_CODEC_ID_ADPCM_YAMAHA, |
|
AV_CODEC_ID_ADPCM_SBPRO_4, |
|
AV_CODEC_ID_ADPCM_SBPRO_3, |
|
AV_CODEC_ID_ADPCM_SBPRO_2, |
|
AV_CODEC_ID_ADPCM_THP, |
|
AV_CODEC_ID_ADPCM_IMA_AMV, |
|
AV_CODEC_ID_ADPCM_EA_R1, |
|
AV_CODEC_ID_ADPCM_EA_R3, |
|
AV_CODEC_ID_ADPCM_EA_R2, |
|
AV_CODEC_ID_ADPCM_IMA_EA_SEAD, |
|
AV_CODEC_ID_ADPCM_IMA_EA_EACS, |
|
AV_CODEC_ID_ADPCM_EA_XAS, |
|
AV_CODEC_ID_ADPCM_EA_MAXIS_XA, |
|
AV_CODEC_ID_ADPCM_IMA_ISS, |
|
AV_CODEC_ID_ADPCM_G722, |
|
AV_CODEC_ID_ADPCM_IMA_APC, |
|
AV_CODEC_ID_ADPCM_VIMA, |
|
#if FF_API_VIMA_DECODER |
|
AV_CODEC_ID_VIMA = AV_CODEC_ID_ADPCM_VIMA, |
|
#endif |
|
|
|
AV_CODEC_ID_ADPCM_AFC = 0x11800, |
|
AV_CODEC_ID_ADPCM_IMA_OKI, |
|
AV_CODEC_ID_ADPCM_DTK, |
|
AV_CODEC_ID_ADPCM_IMA_RAD, |
|
AV_CODEC_ID_ADPCM_G726LE, |
|
AV_CODEC_ID_ADPCM_THP_LE, |
|
AV_CODEC_ID_ADPCM_PSX, |
|
AV_CODEC_ID_ADPCM_AICA, |
|
AV_CODEC_ID_ADPCM_IMA_DAT4, |
|
AV_CODEC_ID_ADPCM_MTAF, |
|
|
|
/* AMR */ |
|
AV_CODEC_ID_AMR_NB = 0x12000, |
|
AV_CODEC_ID_AMR_WB, |
|
|
|
/* RealAudio codecs*/ |
|
AV_CODEC_ID_RA_144 = 0x13000, |
|
AV_CODEC_ID_RA_288, |
|
|
|
/* various DPCM codecs */ |
|
AV_CODEC_ID_ROQ_DPCM = 0x14000, |
|
AV_CODEC_ID_INTERPLAY_DPCM, |
|
AV_CODEC_ID_XAN_DPCM, |
|
AV_CODEC_ID_SOL_DPCM, |
|
|
|
AV_CODEC_ID_SDX2_DPCM = 0x14800, |
|
AV_CODEC_ID_GREMLIN_DPCM, |
|
|
|
/* audio codecs */ |
|
AV_CODEC_ID_MP2 = 0x15000, |
|
AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
|
AV_CODEC_ID_AAC, |
|
AV_CODEC_ID_AC3, |
|
AV_CODEC_ID_DTS, |
|
AV_CODEC_ID_VORBIS, |
|
AV_CODEC_ID_DVAUDIO, |
|
AV_CODEC_ID_WMAV1, |
|
AV_CODEC_ID_WMAV2, |
|
AV_CODEC_ID_MACE3, |
|
AV_CODEC_ID_MACE6, |
|
AV_CODEC_ID_VMDAUDIO, |
|
AV_CODEC_ID_FLAC, |
|
AV_CODEC_ID_MP3ADU, |
|
AV_CODEC_ID_MP3ON4, |
|
AV_CODEC_ID_SHORTEN, |
|
AV_CODEC_ID_ALAC, |
|
AV_CODEC_ID_WESTWOOD_SND1, |
|
AV_CODEC_ID_GSM, ///< as in Berlin toast format |
|
AV_CODEC_ID_QDM2, |
|
AV_CODEC_ID_COOK, |
|
AV_CODEC_ID_TRUESPEECH, |
|
AV_CODEC_ID_TTA, |
|
AV_CODEC_ID_SMACKAUDIO, |
|
AV_CODEC_ID_QCELP, |
|
AV_CODEC_ID_WAVPACK, |
|
AV_CODEC_ID_DSICINAUDIO, |
|
AV_CODEC_ID_IMC, |
|
AV_CODEC_ID_MUSEPACK7, |
|
AV_CODEC_ID_MLP, |
|
AV_CODEC_ID_GSM_MS, /* as found in WAV */ |
|
AV_CODEC_ID_ATRAC3, |
|
#if FF_API_VOXWARE |
|
AV_CODEC_ID_VOXWARE, |
|
#endif |
|
AV_CODEC_ID_APE, |
|
AV_CODEC_ID_NELLYMOSER, |
|
AV_CODEC_ID_MUSEPACK8, |
|
AV_CODEC_ID_SPEEX, |
|
AV_CODEC_ID_WMAVOICE, |
|
AV_CODEC_ID_WMAPRO, |
|
AV_CODEC_ID_WMALOSSLESS, |
|
AV_CODEC_ID_ATRAC3P, |
|
AV_CODEC_ID_EAC3, |
|
AV_CODEC_ID_SIPR, |
|
AV_CODEC_ID_MP1, |
|
AV_CODEC_ID_TWINVQ, |
|
AV_CODEC_ID_TRUEHD, |
|
AV_CODEC_ID_MP4ALS, |
|
AV_CODEC_ID_ATRAC1, |
|
AV_CODEC_ID_BINKAUDIO_RDFT, |
|
AV_CODEC_ID_BINKAUDIO_DCT, |
|
AV_CODEC_ID_AAC_LATM, |
|
AV_CODEC_ID_QDMC, |
|
AV_CODEC_ID_CELT, |
|
AV_CODEC_ID_G723_1, |
|
AV_CODEC_ID_G729, |
|
AV_CODEC_ID_8SVX_EXP, |
|
AV_CODEC_ID_8SVX_FIB, |
|
AV_CODEC_ID_BMV_AUDIO, |
|
AV_CODEC_ID_RALF, |
|
AV_CODEC_ID_IAC, |
|
AV_CODEC_ID_ILBC, |
|
AV_CODEC_ID_OPUS, |
|
AV_CODEC_ID_COMFORT_NOISE, |
|
AV_CODEC_ID_TAK, |
|
AV_CODEC_ID_METASOUND, |
|
AV_CODEC_ID_PAF_AUDIO, |
|
AV_CODEC_ID_ON2AVC, |
|
AV_CODEC_ID_DSS_SP, |
|
|
|
AV_CODEC_ID_FFWAVESYNTH = 0x15800, |
|
AV_CODEC_ID_SONIC, |
|
AV_CODEC_ID_SONIC_LS, |
|
AV_CODEC_ID_EVRC, |
|
AV_CODEC_ID_SMV, |
|
AV_CODEC_ID_DSD_LSBF, |
|
AV_CODEC_ID_DSD_MSBF, |
|
AV_CODEC_ID_DSD_LSBF_PLANAR, |
|
AV_CODEC_ID_DSD_MSBF_PLANAR, |
|
AV_CODEC_ID_4GV, |
|
AV_CODEC_ID_INTERPLAY_ACM, |
|
AV_CODEC_ID_XMA1, |
|
AV_CODEC_ID_XMA2, |
|
AV_CODEC_ID_DST, |
|
AV_CODEC_ID_ATRAC3AL, |
|
AV_CODEC_ID_ATRAC3PAL, |
|
AV_CODEC_ID_DOLBY_E, |
|
|
|
/* subtitle codecs */ |
|
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. |
|
AV_CODEC_ID_DVD_SUBTITLE = 0x17000, |
|
AV_CODEC_ID_DVB_SUBTITLE, |
|
AV_CODEC_ID_TEXT, ///< raw UTF-8 text |
|
AV_CODEC_ID_XSUB, |
|
AV_CODEC_ID_SSA, |
|
AV_CODEC_ID_MOV_TEXT, |
|
AV_CODEC_ID_HDMV_PGS_SUBTITLE, |
|
AV_CODEC_ID_DVB_TELETEXT, |
|
AV_CODEC_ID_SRT, |
|
|
|
AV_CODEC_ID_MICRODVD = 0x17800, |
|
AV_CODEC_ID_EIA_608, |
|
AV_CODEC_ID_JACOSUB, |
|
AV_CODEC_ID_SAMI, |
|
AV_CODEC_ID_REALTEXT, |
|
AV_CODEC_ID_STL, |
|
AV_CODEC_ID_SUBVIEWER1, |
|
AV_CODEC_ID_SUBVIEWER, |
|
AV_CODEC_ID_SUBRIP, |
|
AV_CODEC_ID_WEBVTT, |
|
AV_CODEC_ID_MPL2, |
|
AV_CODEC_ID_VPLAYER, |
|
AV_CODEC_ID_PJS, |
|
AV_CODEC_ID_ASS, |
|
AV_CODEC_ID_HDMV_TEXT_SUBTITLE, |
|
|
|
/* other specific kind of codecs (generally used for attachments) */ |
|
AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. |
|
AV_CODEC_ID_TTF = 0x18000, |
|
|
|
AV_CODEC_ID_SCTE_35, ///< Contain timestamp estimated through PCR of program stream. |
|
AV_CODEC_ID_BINTEXT = 0x18800, |
|
AV_CODEC_ID_XBIN, |
|
AV_CODEC_ID_IDF, |
|
AV_CODEC_ID_OTF, |
|
AV_CODEC_ID_SMPTE_KLV, |
|
AV_CODEC_ID_DVD_NAV, |
|
AV_CODEC_ID_TIMED_ID3, |
|
AV_CODEC_ID_BIN_DATA, |
|
|
|
|
|
AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it |
|
|
|
AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
|
* stream (only used by libavformat) */ |
|
AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems |
|
* stream (only used by libavformat) */ |
|
AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. |
|
AV_CODEC_ID_WRAPPED_AVFRAME = 0x21001, ///< Passthrough codec, AVFrames wrapped in AVPacket |
|
}; |
|
|
|
/** |
|
* This struct describes the properties of a single codec described by an |
|
* AVCodecID. |
|
* @see avcodec_descriptor_get() |
|
*/ |
|
typedef struct AVCodecDescriptor { |
|
enum AVCodecID id; |
|
enum AVMediaType type; |
|
/** |
|
* Name of the codec described by this descriptor. It is non-empty and |
|
* unique for each codec descriptor. It should contain alphanumeric |
|
* characters and '_' only. |
|
*/ |
|
const char *name; |
|
/** |
|
* A more descriptive name for this codec. May be NULL. |
|
*/ |
|
const char *long_name; |
|
/** |
|
* Codec properties, a combination of AV_CODEC_PROP_* flags. |
|
*/ |
|
int props; |
|
/** |
|
* MIME type(s) associated with the codec. |
|
* May be NULL; if not, a NULL-terminated array of MIME types. |
|
* The first item is always non-NULL and is the preferred MIME type. |
|
*/ |
|
const char *const *mime_types; |
|
/** |
|
* If non-NULL, an array of profiles recognized for this codec. |
|
* Terminated with FF_PROFILE_UNKNOWN. |
|
*/ |
|
const struct AVProfile *profiles; |
|
} AVCodecDescriptor; |
|
|
|
/** |
|
* Codec uses only intra compression. |
|
* Video and audio codecs only. |
|
*/ |
|
#define AV_CODEC_PROP_INTRA_ONLY (1 << 0) |
|
/** |
|
* Codec supports lossy compression. Audio and video codecs only. |
|
* @note a codec may support both lossy and lossless |
|
* compression modes |
|
*/ |
|
#define AV_CODEC_PROP_LOSSY (1 << 1) |
|
/** |
|
* Codec supports lossless compression. Audio and video codecs only. |
|
*/ |
|
#define AV_CODEC_PROP_LOSSLESS (1 << 2) |
|
/** |
|
* Codec supports frame reordering. That is, the coded order (the order in which |
|
* the encoded packets are output by the encoders / stored / input to the |
|
* decoders) may be different from the presentation order of the corresponding |
|
* frames. |
|
* |
|
* For codecs that do not have this property set, PTS and DTS should always be |
|
* equal. |
|
*/ |
|
#define AV_CODEC_PROP_REORDER (1 << 3) |
|
/** |
|
* Subtitle codec is bitmap based |
|
* Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field. |
|
*/ |
|
#define AV_CODEC_PROP_BITMAP_SUB (1 << 16) |
|
/** |
|
* Subtitle codec is text based. |
|
* Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field. |
|
*/ |
|
#define AV_CODEC_PROP_TEXT_SUB (1 << 17) |
|
|
|
/** |
|
* @ingroup lavc_decoding |
|
* Required number of additionally allocated bytes at the end of the input bitstream for decoding. |
|
* This is mainly needed because some optimized bitstream readers read |
|
* 32 or 64 bit at once and could read over the end.<br> |
|
* Note: If the first 23 bits of the additional bytes are not 0, then damaged |
|
* MPEG bitstreams could cause overread and segfault. |
|
*/ |
|
#define AV_INPUT_BUFFER_PADDING_SIZE 32 |
|
|
|
/** |
|
* @ingroup lavc_encoding |
|
* minimum encoding buffer size |
|
* Used to avoid some checks during header writing. |
|
*/ |
|
#define AV_INPUT_BUFFER_MIN_SIZE 16384 |
|
|
|
#if FF_API_WITHOUT_PREFIX |
|
/** |
|
* @deprecated use AV_INPUT_BUFFER_PADDING_SIZE instead |
|
*/ |
|
#define FF_INPUT_BUFFER_PADDING_SIZE 32 |
|
|
|
/** |
|
* @deprecated use AV_INPUT_BUFFER_MIN_SIZE instead |
|
*/ |
|
#define FF_MIN_BUFFER_SIZE 16384 |
|
#endif /* FF_API_WITHOUT_PREFIX */ |
|
|
|
/** |
|
* @ingroup lavc_encoding |
|
* motion estimation type. |
|
* @deprecated use codec private option instead |
|
*/ |
|
#if FF_API_MOTION_EST |
|
enum Motion_Est_ID { |
|
ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed |
|
ME_FULL, |
|
ME_LOG, |
|
ME_PHODS, |
|
ME_EPZS, ///< enhanced predictive zonal search |
|
ME_X1, ///< reserved for experiments |
|
ME_HEX, ///< hexagon based search |
|
ME_UMH, ///< uneven multi-hexagon search |
|
ME_TESA, ///< transformed exhaustive search algorithm |
|
ME_ITER=50, ///< iterative search |
|
}; |
|
#endif |
|
|
|
/** |
|
* @ingroup lavc_decoding |
|
*/ |
|
enum AVDiscard{ |
|
/* We leave some space between them for extensions (drop some |
|
* keyframes for intra-only or drop just some bidir frames). */ |
|
AVDISCARD_NONE =-16, ///< discard nothing |
|
AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi |
|
AVDISCARD_NONREF = 8, ///< discard all non reference |
|
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames |
|
AVDISCARD_NONINTRA= 24, ///< discard all non intra frames |
|
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes |
|
AVDISCARD_ALL = 48, ///< discard all |
|
}; |
|
|
|
enum AVAudioServiceType { |
|
AV_AUDIO_SERVICE_TYPE_MAIN = 0, |
|
AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, |
|
AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, |
|
AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, |
|
AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, |
|
AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, |
|
AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, |
|
AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, |
|
AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, |
|
AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI |
|
}; |
|
|
|
/** |
|
* @ingroup lavc_encoding |
|
*/ |
|
typedef struct RcOverride{ |
|
int start_frame; |
|
int end_frame; |
|
int qscale; // If this is 0 then quality_factor will be used instead. |
|
float quality_factor; |
|
} RcOverride; |
|
|
|
#if FF_API_MAX_BFRAMES |
|
/** |
|
* @deprecated there is no libavcodec-wide limit on the number of B-frames |
|
*/ |
|
#define FF_MAX_B_FRAMES 16 |
|
#endif |
|
|
|
/* encoding support |
|
These flags can be passed in AVCodecContext.flags before initialization. |
|
Note: Not everything is supported yet. |
|
*/ |
|
|
|
/** |
|
* Allow decoders to produce frames with data planes that are not aligned |
|
* to CPU requirements (e.g. due to cropping). |
|
*/ |
|
#define AV_CODEC_FLAG_UNALIGNED (1 << 0) |
|
/** |
|
* Use fixed qscale. |
|
*/ |
|
#define AV_CODEC_FLAG_QSCALE (1 << 1) |
|
/** |
|
* 4 MV per MB allowed / advanced prediction for H.263. |
|
*/ |
|
#define AV_CODEC_FLAG_4MV (1 << 2) |
|
/** |
|
* Output even those frames that might be corrupted. |
|
*/ |
|
#define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3) |
|
/** |
|
* Use qpel MC. |
|
*/ |
|
#define AV_CODEC_FLAG_QPEL (1 << 4) |
|
/** |
|
* Use internal 2pass ratecontrol in first pass mode. |
|
*/ |
|
#define AV_CODEC_FLAG_PASS1 (1 << 9) |
|
/** |
|
* Use internal 2pass ratecontrol in second pass mode. |
|
*/ |
|
#define AV_CODEC_FLAG_PASS2 (1 << 10) |
|
/** |
|
* loop filter. |
|
*/ |
|
#define AV_CODEC_FLAG_LOOP_FILTER (1 << 11) |
|
/** |
|
* Only decode/encode grayscale. |
|
*/ |
|
#define AV_CODEC_FLAG_GRAY (1 << 13) |
|
/** |
|
* error[?] variables will be set during encoding. |
|
*/ |
|
#define AV_CODEC_FLAG_PSNR (1 << 15) |
|
/** |
|
* Input bitstream might be truncated at a random location |
|
* instead of only at frame boundaries. |
|
*/ |
|
#define AV_CODEC_FLAG_TRUNCATED (1 << 16) |
|
/** |
|
* Use interlaced DCT. |
|
*/ |
|
#define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18) |
|
/** |
|
* Force low delay. |
|
*/ |
|
#define AV_CODEC_FLAG_LOW_DELAY (1 << 19) |
|
/** |
|
* Place global headers in extradata instead of every keyframe. |
|
*/ |
|
#define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22) |
|
/** |
|
* Use only bitexact stuff (except (I)DCT). |
|
*/ |
|
#define AV_CODEC_FLAG_BITEXACT (1 << 23) |
|
/* Fx : Flag for H.263+ extra options */ |
|
/** |
|
* H.263 advanced intra coding / MPEG-4 AC prediction |
|
*/ |
|
#define AV_CODEC_FLAG_AC_PRED (1 << 24) |
|
/** |
|
* interlaced motion estimation |
|
*/ |
|
#define AV_CODEC_FLAG_INTERLACED_ME (1 << 29) |
|
#define AV_CODEC_FLAG_CLOSED_GOP (1U << 31) |
|
|
|
/** |
|
* Allow non spec compliant speedup tricks. |
|
*/ |
|
#define AV_CODEC_FLAG2_FAST (1 << 0) |
|
/** |
|
* Skip bitstream encoding. |
|
*/ |
|
#define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2) |
|
/** |
|
* Place global headers at every keyframe instead of in extradata. |
|
*/ |
|
#define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3) |
|
|
|
/** |
|
* timecode is in drop frame format. DEPRECATED!!!! |
|
*/ |
|
#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE (1 << 13) |
|
|
|
/** |
|
* Input bitstream might be truncated at a packet boundaries |
|
* instead of only at frame boundaries. |
|
*/ |
|
#define AV_CODEC_FLAG2_CHUNKS (1 << 15) |
|
/** |
|
* Discard cropping information from SPS. |
|
*/ |
|
#define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16) |
|
|
|
/** |
|
* Show all frames before the first keyframe |
|
*/ |
|
#define AV_CODEC_FLAG2_SHOW_ALL (1 << 22) |
|
/** |
|
* Export motion vectors through frame side data |
|
*/ |
|
#define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28) |
|
/** |
|
* Do not skip samples and export skip information as frame side data |
|
*/ |
|
#define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29) |
|
/** |
|
* Do not reset ASS ReadOrder field on flush (subtitles decoding) |
|
*/ |
|
#define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30) |
|
|
|
/* Unsupported options : |
|
* Syntax Arithmetic coding (SAC) |
|
* Reference Picture Selection |
|
* Independent Segment Decoding */ |
|
/* /Fx */ |
|
/* codec capabilities */ |
|
|
|
/** |
|
* Decoder can use draw_horiz_band callback. |
|
*/ |
|
#define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0) |
|
/** |
|
* Codec uses get_buffer() for allocating buffers and supports custom allocators. |
|
* If not set, it might not use get_buffer() at all or use operations that |
|
* assume the buffer was allocated by avcodec_default_get_buffer. |
|
*/ |
|
#define AV_CODEC_CAP_DR1 (1 << 1) |
|
#define AV_CODEC_CAP_TRUNCATED (1 << 3) |
|
/** |
|
* Encoder or decoder requires flushing with NULL input at the end in order to |
|
* give the complete and correct output. |
|
* |
|
* NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
|
* with NULL data. The user can still send NULL data to the public encode |
|
* or decode function, but libavcodec will not pass it along to the codec |
|
* unless this flag is set. |
|
* |
|
* Decoders: |
|
* The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
|
* avpkt->size=0 at the end to get the delayed data until the decoder no longer |
|
* returns frames. |
|
* |
|
* Encoders: |
|
* The encoder needs to be fed with NULL data at the end of encoding until the |
|
* encoder no longer returns data. |
|
* |
|
* NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
|
* flag also means that the encoder must set the pts and duration for |
|
* each output packet. If this flag is not set, the pts and duration will |
|
* be determined by libavcodec from the input frame. |
|
*/ |
|
#define AV_CODEC_CAP_DELAY (1 << 5) |
|
/** |
|
* Codec can be fed a final frame with a smaller size. |
|
* This can be used to prevent truncation of the last audio samples. |
|
*/ |
|
#define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6) |
|
|
|
#if FF_API_CAP_VDPAU |
|
/** |
|
* Codec can export data for HW decoding (VDPAU). |
|
*/ |
|
#define AV_CODEC_CAP_HWACCEL_VDPAU (1 << 7) |
|
#endif |
|
|
|
/** |
|
* Codec can output multiple frames per AVPacket |
|
* Normally demuxers return one frame at a time, demuxers which do not do |
|
* are connected to a parser to split what they return into proper frames. |
|
* This flag is reserved to the very rare category of codecs which have a |
|
* bitstream that cannot be split into frames without timeconsuming |
|
* operations like full decoding. Demuxers carrying such bitstreams thus |
|
* may return multiple frames in a packet. This has many disadvantages like |
|
* prohibiting stream copy in many cases thus it should only be considered |
|
* as a last resort. |
|
*/ |
|
#define AV_CODEC_CAP_SUBFRAMES (1 << 8) |
|
/** |
|
* Codec is experimental and is thus avoided in favor of non experimental |
|
* encoders |
|
*/ |
|
#define AV_CODEC_CAP_EXPERIMENTAL (1 << 9) |
|
/** |
|
* Codec should fill in channel configuration and samplerate instead of container |
|
*/ |
|
#define AV_CODEC_CAP_CHANNEL_CONF (1 << 10) |
|
/** |
|
* Codec supports frame-level multithreading. |
|
*/ |
|
#define AV_CODEC_CAP_FRAME_THREADS (1 << 12) |
|
/** |
|
* Codec supports slice-based (or partition-based) multithreading. |
|
*/ |
|
#define AV_CODEC_CAP_SLICE_THREADS (1 << 13) |
|
/** |
|
* Codec supports changed parameters at any point. |
|
*/ |
|
#define AV_CODEC_CAP_PARAM_CHANGE (1 << 14) |
|
/** |
|
* Codec supports avctx->thread_count == 0 (auto). |
|
*/ |
|
#define AV_CODEC_CAP_AUTO_THREADS (1 << 15) |
|
/** |
|
* Audio encoder supports receiving a different number of samples in each call. |
|
*/ |
|
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16) |
|
/** |
|
* Decoder is not a preferred choice for probing. |
|
* This indicates that the decoder is not a good choice for probing. |
|
* It could for example be an expensive to spin up hardware decoder, |
|
* or it could simply not provide a lot of useful information about |
|
* the stream. |
|
* A decoder marked with this flag should only be used as last resort |
|
* choice for probing. |
|
*/ |
|
#define AV_CODEC_CAP_AVOID_PROBING (1 << 17) |
|
/** |
|
* Codec is intra only. |
|
*/ |
|
#define AV_CODEC_CAP_INTRA_ONLY 0x40000000 |
|
/** |
|
* Codec is lossless. |
|
*/ |
|
#define AV_CODEC_CAP_LOSSLESS 0x80000000 |
|
|
|
|
|
#if FF_API_WITHOUT_PREFIX |
|
/** |
|
* Allow decoders to produce frames with data planes that are not aligned |
|
* to CPU requirements (e.g. due to cropping). |
|
*/ |
|
#define CODEC_FLAG_UNALIGNED AV_CODEC_FLAG_UNALIGNED |
|
#define CODEC_FLAG_QSCALE AV_CODEC_FLAG_QSCALE |
|
#define CODEC_FLAG_4MV AV_CODEC_FLAG_4MV |
|
#define CODEC_FLAG_OUTPUT_CORRUPT AV_CODEC_FLAG_OUTPUT_CORRUPT |
|
#define CODEC_FLAG_QPEL AV_CODEC_FLAG_QPEL |
|
#if FF_API_GMC |
|
/** |
|
* @deprecated use the "gmc" private option of the libxvid encoder |
|
*/ |
|
#define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
|
#endif |
|
#if FF_API_MV0 |
|
/** |
|
* @deprecated use the flag "mv0" in the "mpv_flags" private option of the |
|
* mpegvideo encoders |
|
*/ |
|
#define CODEC_FLAG_MV0 0x0040 |
|
#endif |
|
#if FF_API_INPUT_PRESERVED |
|
/** |
|
* @deprecated passing reference-counted frames to the encoders replaces this |
|
* flag |
|
*/ |
|
#define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
|
#endif |
|
#define CODEC_FLAG_PASS1 AV_CODEC_FLAG_PASS1 |
|
#define CODEC_FLAG_PASS2 AV_CODEC_FLAG_PASS2 |
|
#define CODEC_FLAG_GRAY AV_CODEC_FLAG_GRAY |
|
#if FF_API_EMU_EDGE |
|
/** |
|
* @deprecated edges are not used/required anymore. I.e. this flag is now always |
|
* set. |
|
*/ |
|
#define CODEC_FLAG_EMU_EDGE 0x4000 |
|
#endif |
|
#define CODEC_FLAG_PSNR AV_CODEC_FLAG_PSNR |
|
#define CODEC_FLAG_TRUNCATED AV_CODEC_FLAG_TRUNCATED |
|
|
|
#if FF_API_NORMALIZE_AQP |
|
/** |
|
* @deprecated use the flag "naq" in the "mpv_flags" private option of the |
|
* mpegvideo encoders |
|
*/ |
|
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 |
|
#endif |
|
#define CODEC_FLAG_INTERLACED_DCT AV_CODEC_FLAG_INTERLACED_DCT |
|
#define CODEC_FLAG_LOW_DELAY AV_CODEC_FLAG_LOW_DELAY |
|
#define CODEC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER |
|
#define CODEC_FLAG_BITEXACT AV_CODEC_FLAG_BITEXACT |
|
#define CODEC_FLAG_AC_PRED AV_CODEC_FLAG_AC_PRED |
|
#define CODEC_FLAG_LOOP_FILTER AV_CODEC_FLAG_LOOP_FILTER |
|
#define CODEC_FLAG_INTERLACED_ME AV_CODEC_FLAG_INTERLACED_ME |
|
#define CODEC_FLAG_CLOSED_GOP AV_CODEC_FLAG_CLOSED_GOP |
|
#define CODEC_FLAG2_FAST AV_CODEC_FLAG2_FAST |
|
#define CODEC_FLAG2_NO_OUTPUT AV_CODEC_FLAG2_NO_OUTPUT |
|
#define CODEC_FLAG2_LOCAL_HEADER AV_CODEC_FLAG2_LOCAL_HEADER |
|
#define CODEC_FLAG2_DROP_FRAME_TIMECODE AV_CODEC_FLAG2_DROP_FRAME_TIMECODE |
|
#define CODEC_FLAG2_IGNORE_CROP AV_CODEC_FLAG2_IGNORE_CROP |
|
|
|
#define CODEC_FLAG2_CHUNKS AV_CODEC_FLAG2_CHUNKS |
|
#define CODEC_FLAG2_SHOW_ALL AV_CODEC_FLAG2_SHOW_ALL |
|
#define CODEC_FLAG2_EXPORT_MVS AV_CODEC_FLAG2_EXPORT_MVS |
|
#define CODEC_FLAG2_SKIP_MANUAL AV_CODEC_FLAG2_SKIP_MANUAL |
|
|
|
/* Unsupported options : |
|
* Syntax Arithmetic coding (SAC) |
|
* Reference Picture Selection |
|
* Independent Segment Decoding */ |
|
/* /Fx */ |
|
/* codec capabilities */ |
|
|
|
#define CODEC_CAP_DRAW_HORIZ_BAND AV_CODEC_CAP_DRAW_HORIZ_BAND ///< Decoder can use draw_horiz_band callback. |
|
/** |
|
* Codec uses get_buffer() for allocating buffers and supports custom allocators. |
|
* If not set, it might not use get_buffer() at all or use operations that |
|
* assume the buffer was allocated by avcodec_default_get_buffer. |
|
*/ |
|
#define CODEC_CAP_DR1 AV_CODEC_CAP_DR1 |
|
#define CODEC_CAP_TRUNCATED AV_CODEC_CAP_TRUNCATED |
|
#if FF_API_XVMC |
|
/* Codec can export data for HW decoding. This flag indicates that |
|
* the codec would call get_format() with list that might contain HW accelerated |
|
* pixel formats (XvMC, VDPAU, VAAPI, etc). The application can pick any of them |
|
* including raw image format. |
|
* The application can use the passed context to determine bitstream version, |
|
* chroma format, resolution etc. |
|
*/ |
|
#define CODEC_CAP_HWACCEL 0x0010 |
|
#endif /* FF_API_XVMC */ |
|
/** |
|
* Encoder or decoder requires flushing with NULL input at the end in order to |
|
* give the complete and correct output. |
|
* |
|
* NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
|
* with NULL data. The user can still send NULL data to the public encode |
|
* or decode function, but libavcodec will not pass it along to the codec |
|
* unless this flag is set. |
|
* |
|
* Decoders: |
|
* The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
|
* avpkt->size=0 at the end to get the delayed data until the decoder no longer |
|
* returns frames. |
|
* |
|
* Encoders: |
|
* The encoder needs to be fed with NULL data at the end of encoding until the |
|
* encoder no longer returns data. |
|
* |
|
* NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
|
* flag also means that the encoder must set the pts and duration for |
|
* each output packet. If this flag is not set, the pts and duration will |
|
* be determined by libavcodec from the input frame. |
|
*/ |
|
#define CODEC_CAP_DELAY AV_CODEC_CAP_DELAY |
|
/** |
|
* Codec can be fed a final frame with a smaller size. |
|
* This can be used to prevent truncation of the last audio samples. |
|
*/ |
|
#define CODEC_CAP_SMALL_LAST_FRAME AV_CODEC_CAP_SMALL_LAST_FRAME |
|
#if FF_API_CAP_VDPAU |
|
/** |
|
* Codec can export data for HW decoding (VDPAU). |
|
*/ |
|
#define CODEC_CAP_HWACCEL_VDPAU AV_CODEC_CAP_HWACCEL_VDPAU |
|
#endif |
|
/** |
|
* Codec can output multiple frames per AVPacket |
|
* Normally demuxers return one frame at a time, demuxers which do not do |
|
* are connected to a parser to split what they return into proper frames. |
|
* This flag is reserved to the very rare category of codecs which have a |
|
* bitstream that cannot be split into frames without timeconsuming |
|
* operations like full decoding. Demuxers carrying such bitstreams thus |
|
* may return multiple frames in a packet. This has many disadvantages like |
|
* prohibiting stream copy in many cases thus it should only be considered |
|
* as a last resort. |
|
*/ |
|
#define CODEC_CAP_SUBFRAMES AV_CODEC_CAP_SUBFRAMES |
|
/** |
|
* Codec is experimental and is thus avoided in favor of non experimental |
|
* encoders |
|
*/ |
|
#define CODEC_CAP_EXPERIMENTAL AV_CODEC_CAP_EXPERIMENTAL |
|
/** |
|
* Codec should fill in channel configuration and samplerate instead of container |
|
*/ |
|
#define CODEC_CAP_CHANNEL_CONF AV_CODEC_CAP_CHANNEL_CONF |
|
#if FF_API_NEG_LINESIZES |
|
/** |
|
* @deprecated no codecs use this capability |
|
*/ |
|
#define CODEC_CAP_NEG_LINESIZES 0x0800 |
|
#endif |
|
/** |
|
* Codec supports frame-level multithreading. |
|
*/ |
|
#define CODEC_CAP_FRAME_THREADS AV_CODEC_CAP_FRAME_THREADS |
|
/** |
|
* Codec supports slice-based (or partition-based) multithreading. |
|
*/ |
|
#define CODEC_CAP_SLICE_THREADS AV_CODEC_CAP_SLICE_THREADS |
|
/** |
|
* Codec supports changed parameters at any point. |
|
*/ |
|
#define CODEC_CAP_PARAM_CHANGE AV_CODEC_CAP_PARAM_CHANGE |
|
/** |
|
* Codec supports avctx->thread_count == 0 (auto). |
|
*/ |
|
#define CODEC_CAP_AUTO_THREADS AV_CODEC_CAP_AUTO_THREADS |
|
/** |
|
* Audio encoder supports receiving a different number of samples in each call. |
|
*/ |
|
#define CODEC_CAP_VARIABLE_FRAME_SIZE AV_CODEC_CAP_VARIABLE_FRAME_SIZE |
|
/** |
|
* Codec is intra only. |
|
*/ |
|
#define CODEC_CAP_INTRA_ONLY AV_CODEC_CAP_INTRA_ONLY |
|
/** |
|
* Codec is lossless. |
|
*/ |
|
#define CODEC_CAP_LOSSLESS AV_CODEC_CAP_LOSSLESS |
|
|
|
/** |
|
* HWAccel is experimental and is thus avoided in favor of non experimental |
|
* codecs |
|
*/ |
|
#define HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200 |
|
#endif /* FF_API_WITHOUT_PREFIX */ |
|
|
|
#if FF_API_MB_TYPE |
|
//The following defines may change, don't expect compatibility if you use them. |
|
#define MB_TYPE_INTRA4x4 0x0001 |
|
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific |
|
#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific |
|
#define MB_TYPE_16x16 0x0008 |
|
#define MB_TYPE_16x8 0x0010 |
|
#define MB_TYPE_8x16 0x0020 |
|
#define MB_TYPE_8x8 0x0040 |
|
#define MB_TYPE_INTERLACED 0x0080 |
|
#define MB_TYPE_DIRECT2 0x0100 //FIXME |
|
#define MB_TYPE_ACPRED 0x0200 |
|
#define MB_TYPE_GMC 0x0400 |
|
#define MB_TYPE_SKIP 0x0800 |
|
#define MB_TYPE_P0L0 0x1000 |
|
#define MB_TYPE_P1L0 0x2000 |
|
#define MB_TYPE_P0L1 0x4000 |
|
#define MB_TYPE_P1L1 0x8000 |
|
#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0) |
|
#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1) |
|
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1) |
|
#define MB_TYPE_QUANT 0x00010000 |
|
#define MB_TYPE_CBP 0x00020000 |
|
// Note bits 24-31 are reserved for codec specific use (H.264 ref0, MPEG-1 0mv, ...) |
|
#endif |
|
|
|
/** |
|
* Pan Scan area. |
|
* This specifies the area which should be displayed. |
|
* Note there may be multiple such areas for one frame. |
|
*/ |
|
typedef struct AVPanScan{ |
|
/** |
|
* id |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int id; |
|
|
|
/** |
|
* width and height in 1/16 pel |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int width; |
|
int height; |
|
|
|
/** |
|
* position of the top left corner in 1/16 pel for up to 3 fields/frames |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int16_t position[3][2]; |
|
}AVPanScan; |
|
|
|
/** |
|
* This structure describes the bitrate properties of an encoded bitstream. It |
|
* roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD |
|
* parameters for H.264/HEVC. |
|
*/ |
|
typedef struct AVCPBProperties { |
|
/** |
|
* Maximum bitrate of the stream, in bits per second. |
|
* Zero if unknown or unspecified. |
|
*/ |
|
int max_bitrate; |
|
/** |
|
* Minimum bitrate of the stream, in bits per second. |
|
* Zero if unknown or unspecified. |
|
*/ |
|
int min_bitrate; |
|
/** |
|
* Average bitrate of the stream, in bits per second. |
|
* Zero if unknown or unspecified. |
|
*/ |
|
int avg_bitrate; |
|
|
|
/** |
|
* The size of the buffer to which the ratecontrol is applied, in bits. |
|
* Zero if unknown or unspecified. |
|
*/ |
|
int buffer_size; |
|
|
|
/** |
|
* The delay between the time the packet this structure is associated with |
|
* is received and the time when it should be decoded, in periods of a 27MHz |
|
* clock. |
|
* |
|
* UINT64_MAX when unknown or unspecified. |
|
*/ |
|
uint64_t vbv_delay; |
|
} AVCPBProperties; |
|
|
|
#if FF_API_QSCALE_TYPE |
|
#define FF_QSCALE_TYPE_MPEG1 0 |
|
#define FF_QSCALE_TYPE_MPEG2 1 |
|
#define FF_QSCALE_TYPE_H264 2 |
|
#define FF_QSCALE_TYPE_VP56 3 |
|
#endif |
|
|
|
/** |
|
* The decoder will keep a reference to the frame and may reuse it later. |
|
*/ |
|
#define AV_GET_BUFFER_FLAG_REF (1 << 0) |
|
|
|
/** |
|
* @defgroup lavc_packet AVPacket |
|
* |
|
* Types and functions for working with AVPacket. |
|
* @{ |
|
*/ |
|
enum AVPacketSideDataType { |
|
/** |
|
* An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE |
|
* bytes worth of palette. This side data signals that a new palette is |
|
* present. |
|
*/ |
|
AV_PKT_DATA_PALETTE, |
|
|
|
/** |
|
* The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format |
|
* that the extradata buffer was changed and the receiving side should |
|
* act upon it appropriately. The new extradata is embedded in the side |
|
* data buffer and should be immediately used for processing the current |
|
* frame or packet. |
|
*/ |
|
AV_PKT_DATA_NEW_EXTRADATA, |
|
|
|
/** |
|
* An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows: |
|
* @code |
|
* u32le param_flags |
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) |
|
* s32le channel_count |
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) |
|
* u64le channel_layout |
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) |
|
* s32le sample_rate |
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) |
|
* s32le width |
|
* s32le height |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_PARAM_CHANGE, |
|
|
|
/** |
|
* An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of |
|
* structures with info about macroblocks relevant to splitting the |
|
* packet into smaller packets on macroblock edges (e.g. as for RFC 2190). |
|
* That is, it does not necessarily contain info about all macroblocks, |
|
* as long as the distance between macroblocks in the info is smaller |
|
* than the target payload size. |
|
* Each MB info structure is 12 bytes, and is laid out as follows: |
|
* @code |
|
* u32le bit offset from the start of the packet |
|
* u8 current quantizer at the start of the macroblock |
|
* u8 GOB number |
|
* u16le macroblock address within the GOB |
|
* u8 horizontal MV predictor |
|
* u8 vertical MV predictor |
|
* u8 horizontal MV predictor for block number 3 |
|
* u8 vertical MV predictor for block number 3 |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_H263_MB_INFO, |
|
|
|
/** |
|
* This side data should be associated with an audio stream and contains |
|
* ReplayGain information in form of the AVReplayGain struct. |
|
*/ |
|
AV_PKT_DATA_REPLAYGAIN, |
|
|
|
/** |
|
* This side data contains a 3x3 transformation matrix describing an affine |
|
* transformation that needs to be applied to the decoded video frames for |
|
* correct presentation. |
|
* |
|
* See libavutil/display.h for a detailed description of the data. |
|
*/ |
|
AV_PKT_DATA_DISPLAYMATRIX, |
|
|
|
/** |
|
* This side data should be associated with a video stream and contains |
|
* Stereoscopic 3D information in form of the AVStereo3D struct. |
|
*/ |
|
AV_PKT_DATA_STEREO3D, |
|
|
|
/** |
|
* This side data should be associated with an audio stream and corresponds |
|
* to enum AVAudioServiceType. |
|
*/ |
|
AV_PKT_DATA_AUDIO_SERVICE_TYPE, |
|
|
|
/** |
|
* This side data contains quality related information from the encoder. |
|
* @code |
|
* u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad). |
|
* u8 picture type |
|
* u8 error count |
|
* u16 reserved |
|
* u64le[error count] sum of squared differences between encoder in and output |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_QUALITY_STATS, |
|
|
|
/** |
|
* This side data contains an integer value representing the stream index |
|
* of a "fallback" track. A fallback track indicates an alternate |
|
* track to use when the current track can not be decoded for some reason. |
|
* e.g. no decoder available for codec. |
|
*/ |
|
AV_PKT_DATA_FALLBACK_TRACK, |
|
|
|
/** |
|
* This side data corresponds to the AVCPBProperties struct. |
|
*/ |
|
AV_PKT_DATA_CPB_PROPERTIES, |
|
|
|
/** |
|
* Recommmends skipping the specified number of samples |
|
* @code |
|
* u32le number of samples to skip from start of this packet |
|
* u32le number of samples to skip from end of this packet |
|
* u8 reason for start skip |
|
* u8 reason for end skip (0=padding silence, 1=convergence) |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_SKIP_SAMPLES=70, |
|
|
|
/** |
|
* An AV_PKT_DATA_JP_DUALMONO side data packet indicates that |
|
* the packet may contain "dual mono" audio specific to Japanese DTV |
|
* and if it is true, recommends only the selected channel to be used. |
|
* @code |
|
* u8 selected channels (0=mail/left, 1=sub/right, 2=both) |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_JP_DUALMONO, |
|
|
|
/** |
|
* A list of zero terminated key/value strings. There is no end marker for |
|
* the list, so it is required to rely on the side data size to stop. |
|
*/ |
|
AV_PKT_DATA_STRINGS_METADATA, |
|
|
|
/** |
|
* Subtitle event position |
|
* @code |
|
* u32le x1 |
|
* u32le y1 |
|
* u32le x2 |
|
* u32le y2 |
|
* @endcode |
|
*/ |
|
AV_PKT_DATA_SUBTITLE_POSITION, |
|
|
|
/** |
|
* Data found in BlockAdditional element of matroska container. There is |
|
* no end marker for the data, so it is required to rely on the side data |
|
* size to recognize the end. 8 byte id (as found in BlockAddId) followed |
|
* by data. |
|
*/ |
|
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, |
|
|
|
/** |
|
* The optional first identifier line of a WebVTT cue. |
|
*/ |
|
AV_PKT_DATA_WEBVTT_IDENTIFIER, |
|
|
|
/** |
|
* The optional settings (rendering instructions) that immediately |
|
* follow the timestamp specifier of a WebVTT cue. |
|
*/ |
|
AV_PKT_DATA_WEBVTT_SETTINGS, |
|
|
|
/** |
|
* A list of zero terminated key/value strings. There is no end marker for |
|
* the list, so it is required to rely on the side data size to stop. This |
|
* side data includes updated metadata which appeared in the stream. |
|
*/ |
|
AV_PKT_DATA_METADATA_UPDATE, |
|
|
|
/** |
|
* MPEGTS stream ID, this is required to pass the stream ID |
|
* information from the demuxer to the corresponding muxer. |
|
*/ |
|
AV_PKT_DATA_MPEGTS_STREAM_ID, |
|
|
|
/** |
|
* Mastering display metadata (based on SMPTE-2086:2014). This metadata |
|
* should be associated with a video stream and contains data in the form |
|
* of the AVMasteringDisplayMetadata struct. |
|
*/ |
|
AV_PKT_DATA_MASTERING_DISPLAY_METADATA, |
|
|
|
/** |
|
* This side data should be associated with a video stream and corresponds |
|
* to the AVSphericalMapping structure. |
|
*/ |
|
AV_PKT_DATA_SPHERICAL, |
|
|
|
/** |
|
* Content light level (based on CTA-861.3). This metadata should be |
|
* associated with a video stream and contains data in the form of the |
|
* AVContentLightMetadata struct. |
|
*/ |
|
AV_PKT_DATA_CONTENT_LIGHT_LEVEL, |
|
|
|
/** |
|
* The number of side data elements (in fact a bit more than it). |
|
* This is not part of the public API/ABI in the sense that it may |
|
* change when new side data types are added. |
|
* This must stay the last enum value. |
|
* If its value becomes huge, some code using it |
|
* needs to be updated as it assumes it to be smaller than other limits. |
|
*/ |
|
AV_PKT_DATA_NB |
|
}; |
|
|
|
#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED |
|
|
|
typedef struct AVPacketSideData { |
|
uint8_t *data; |
|
int size; |
|
enum AVPacketSideDataType type; |
|
} AVPacketSideData; |
|
|
|
/** |
|
* This structure stores compressed data. It is typically exported by demuxers |
|
* and then passed as input to decoders, or received as output from encoders and |
|
* then passed to muxers. |
|
* |
|
* For video, it should typically contain one compressed frame. For audio it may |
|
* contain several compressed frames. Encoders are allowed to output empty |
|
* packets, with no compressed data, containing only side data |
|
* (e.g. to update some stream parameters at the end of encoding). |
|
* |
|
* AVPacket is one of the few structs in FFmpeg, whose size is a part of public |
|
* ABI. Thus it may be allocated on stack and no new fields can be added to it |
|
* without libavcodec and libavformat major bump. |
|
* |
|
* The semantics of data ownership depends on the buf field. |
|
* If it is set, the packet data is dynamically allocated and is |
|
* valid indefinitely until a call to av_packet_unref() reduces the |
|
* reference count to 0. |
|
* |
|
* If the buf field is not set av_packet_ref() would make a copy instead |
|
* of increasing the reference count. |
|
* |
|
* The side data is always allocated with av_malloc(), copied by |
|
* av_packet_ref() and freed by av_packet_unref(). |
|
* |
|
* @see av_packet_ref |
|
* @see av_packet_unref |
|
*/ |
|
typedef struct AVPacket { |
|
/** |
|
* A reference to the reference-counted buffer where the packet data is |
|
* stored. |
|
* May be NULL, then the packet data is not reference-counted. |
|
*/ |
|
AVBufferRef *buf; |
|
/** |
|
* Presentation timestamp in AVStream->time_base units; the time at which |
|
* the decompressed packet will be presented to the user. |
|
* Can be AV_NOPTS_VALUE if it is not stored in the file. |
|
* pts MUST be larger or equal to dts as presentation cannot happen before |
|
* decompression, unless one wants to view hex dumps. Some formats misuse |
|
* the terms dts and pts/cts to mean something different. Such timestamps |
|
* must be converted to true pts/dts before they are stored in AVPacket. |
|
*/ |
|
int64_t pts; |
|
/** |
|
* Decompression timestamp in AVStream->time_base units; the time at which |
|
* the packet is decompressed. |
|
* Can be AV_NOPTS_VALUE if it is not stored in the file. |
|
*/ |
|
int64_t dts; |
|
uint8_t *data; |
|
int size; |
|
int stream_index; |
|
/** |
|
* A combination of AV_PKT_FLAG values |
|
*/ |
|
int flags; |
|
/** |
|
* Additional packet data that can be provided by the container. |
|
* Packet can contain several types of side information. |
|
*/ |
|
AVPacketSideData *side_data; |
|
int side_data_elems; |
|
|
|
/** |
|
* Duration of this packet in AVStream->time_base units, 0 if unknown. |
|
* Equals next_pts - this_pts in presentation order. |
|
*/ |
|
int64_t duration; |
|
|
|
int64_t pos; ///< byte position in stream, -1 if unknown |
|
|
|
#if FF_API_CONVERGENCE_DURATION |
|
/** |
|
* @deprecated Same as the duration field, but as int64_t. This was required |
|
* for Matroska subtitles, whose duration values could overflow when the |
|
* duration field was still an int. |
|
*/ |
|
attribute_deprecated |
|
int64_t convergence_duration; |
|
#endif |
|
} AVPacket; |
|
#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe |
|
#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted |
|
/** |
|
* Flag is used to discard packets which are required to maintain valid |
|
* decoder state but are not required for output and should be dropped |
|
* after decoding. |
|
**/ |
|
#define AV_PKT_FLAG_DISCARD 0x0004 |
|
|
|
enum AVSideDataParamChangeFlags { |
|
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, |
|
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, |
|
AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, |
|
AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, |
|
}; |
|
/** |
|
* @} |
|
*/ |
|
|
|
struct AVCodecInternal; |
|
|
|
enum AVFieldOrder { |
|
AV_FIELD_UNKNOWN, |
|
AV_FIELD_PROGRESSIVE, |
|
AV_FIELD_TT, //< Top coded_first, top displayed first |
|
AV_FIELD_BB, //< Bottom coded first, bottom displayed first |
|
AV_FIELD_TB, //< Top coded first, bottom displayed first |
|
AV_FIELD_BT, //< Bottom coded first, top displayed first |
|
}; |
|
|
|
/** |
|
* main external API structure. |
|
* New fields can be added to the end with minor version bumps. |
|
* Removal, reordering and changes to existing fields require a major |
|
* version bump. |
|
* You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user |
|
* applications. |
|
* The name string for AVOptions options matches the associated command line |
|
* parameter name and can be found in libavcodec/options_table.h |
|
* The AVOption/command line parameter names differ in some cases from the C |
|
* structure field names for historic reasons or brevity. |
|
* sizeof(AVCodecContext) must not be used outside libav*. |
|
*/ |
|
typedef struct AVCodecContext { |
|
/** |
|
* information on struct for av_log |
|
* - set by avcodec_alloc_context3 |
|
*/ |
|
const AVClass *av_class; |
|
int log_level_offset; |
|
|
|
enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ |
|
const struct AVCodec *codec; |
|
#if FF_API_CODEC_NAME |
|
/** |
|
* @deprecated this field is not used for anything in libavcodec |
|
*/ |
|
attribute_deprecated |
|
char codec_name[32]; |
|
#endif |
|
enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ |
|
|
|
/** |
|
* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). |
|
* This is used to work around some encoder bugs. |
|
* A demuxer should set this to what is stored in the field used to identify the codec. |
|
* If there are multiple such fields in a container then the demuxer should choose the one |
|
* which maximizes the information about the used codec. |
|
* If the codec tag field in a container is larger than 32 bits then the demuxer should |
|
* remap the longer ID to 32 bits with a table or other structure. Alternatively a new |
|
* extra_codec_tag + size could be added but for this a clear advantage must be demonstrated |
|
* first. |
|
* - encoding: Set by user, if not then the default based on codec_id will be used. |
|
* - decoding: Set by user, will be converted to uppercase by libavcodec during init. |
|
*/ |
|
unsigned int codec_tag; |
|
|
|
#if FF_API_STREAM_CODEC_TAG |
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated |
|
unsigned int stream_codec_tag; |
|
#endif |
|
|
|
void *priv_data; |
|
|
|
/** |
|
* Private context used for internal data. |
|
* |
|
* Unlike priv_data, this is not codec-specific. It is used in general |
|
* libavcodec functions. |
|
*/ |
|
struct AVCodecInternal *internal; |
|
|
|
/** |
|
* Private data of the user, can be used to carry app specific stuff. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
void *opaque; |
|
|
|
/** |
|
* the average bitrate |
|
* - encoding: Set by user; unused for constant quantizer encoding. |
|
* - decoding: Set by user, may be overwritten by libavcodec |
|
* if this info is available in the stream |
|
*/ |
|
int64_t bit_rate; |
|
|
|
/** |
|
* number of bits the bitstream is allowed to diverge from the reference. |
|
* the reference can be CBR (for CBR pass1) or VBR (for pass2) |
|
* - encoding: Set by user; unused for constant quantizer encoding. |
|
* - decoding: unused |
|
*/ |
|
int bit_rate_tolerance; |
|
|
|
/** |
|
* Global quality for codecs which cannot change it per frame. |
|
* This should be proportional to MPEG-1/2/4 qscale. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int global_quality; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int compression_level; |
|
#define FF_COMPRESSION_DEFAULT -1 |
|
|
|
/** |
|
* AV_CODEC_FLAG_*. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int flags; |
|
|
|
/** |
|
* AV_CODEC_FLAG2_* |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int flags2; |
|
|
|
/** |
|
* some codecs need / can use extradata like Huffman tables. |
|
* MJPEG: Huffman tables |
|
* rv10: additional flags |
|
* MPEG-4: global headers (they can be in the bitstream or here) |
|
* The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger |
|
* than extradata_size to avoid problems if it is read with the bitstream reader. |
|
* The bytewise contents of extradata must not depend on the architecture or CPU endianness. |
|
* - encoding: Set/allocated/freed by libavcodec. |
|
* - decoding: Set/allocated/freed by user. |
|
*/ |
|
uint8_t *extradata; |
|
int extradata_size; |
|
|
|
/** |
|
* This is the fundamental unit of time (in seconds) in terms |
|
* of which frame timestamps are represented. For fixed-fps content, |
|
* timebase should be 1/framerate and timestamp increments should be |
|
* identically 1. |
|
* This often, but not always is the inverse of the frame rate or field rate |
|
* for video. 1/time_base is not the average frame rate if the frame rate is not |
|
* constant. |
|
* |
|
* Like containers, elementary streams also can store timestamps, 1/time_base |
|
* is the unit in which these timestamps are specified. |
|
* As example of such codec time base see ISO/IEC 14496-2:2001(E) |
|
* vop_time_increment_resolution and fixed_vop_rate |
|
* (fixed_vop_rate == 0 implies that it is different from the framerate) |
|
* |
|
* - encoding: MUST be set by user. |
|
* - decoding: the use of this field for decoding is deprecated. |
|
* Use framerate instead. |
|
*/ |
|
AVRational time_base; |
|
|
|
/** |
|
* For some codecs, the time base is closer to the field rate than the frame rate. |
|
* Most notably, H.264 and MPEG-2 specify time_base as half of frame duration |
|
* if no telecine is used ... |
|
* |
|
* Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. |
|
*/ |
|
int ticks_per_frame; |
|
|
|
/** |
|
* Codec delay. |
|
* |
|
* Encoding: Number of frames delay there will be from the encoder input to |
|
* the decoder output. (we assume the decoder matches the spec) |
|
* Decoding: Number of frames delay in addition to what a standard decoder |
|
* as specified in the spec would produce. |
|
* |
|
* Video: |
|
* Number of frames the decoded output will be delayed relative to the |
|
* encoded input. |
|
* |
|
* Audio: |
|
* For encoding, this field is unused (see initial_padding). |
|
* |
|
* For decoding, this is the number of samples the decoder needs to |
|
* output before the decoder's output is valid. When seeking, you should |
|
* start decoding this many samples prior to your desired seek point. |
|
* |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int delay; |
|
|
|
|
|
/* video only */ |
|
/** |
|
* picture width / height. |
|
* |
|
* @note Those fields may not match the values of the last |
|
* AVFrame output by avcodec_decode_video2 due frame |
|
* reordering. |
|
* |
|
* - encoding: MUST be set by user. |
|
* - decoding: May be set by the user before opening the decoder if known e.g. |
|
* from the container. Some decoders will require the dimensions |
|
* to be set by the caller. During decoding, the decoder may |
|
* overwrite those values as required while parsing the data. |
|
*/ |
|
int width, height; |
|
|
|
/** |
|
* Bitstream width / height, may be different from width/height e.g. when |
|
* the decoded frame is cropped before being output or lowres is enabled. |
|
* |
|
* @note Those field may not match the value of the last |
|
* AVFrame output by avcodec_receive_frame() due frame |
|
* reordering. |
|
* |
|
* - encoding: unused |
|
* - decoding: May be set by the user before opening the decoder if known |
|
* e.g. from the container. During decoding, the decoder may |
|
* overwrite those values as required while parsing the data. |
|
*/ |
|
int coded_width, coded_height; |
|
|
|
#if FF_API_ASPECT_EXTENDED |
|
#define FF_ASPECT_EXTENDED 15 |
|
#endif |
|
|
|
/** |
|
* the number of pictures in a group of pictures, or 0 for intra_only |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int gop_size; |
|
|
|
/** |
|
* Pixel format, see AV_PIX_FMT_xxx. |
|
* May be set by the demuxer if known from headers. |
|
* May be overridden by the decoder if it knows better. |
|
* |
|
* @note This field may not match the value of the last |
|
* AVFrame output by avcodec_receive_frame() due frame |
|
* reordering. |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: Set by user if known, overridden by libavcodec while |
|
* parsing the data. |
|
*/ |
|
enum AVPixelFormat pix_fmt; |
|
|
|
#if FF_API_MOTION_EST |
|
/** |
|
* This option does nothing |
|
* @deprecated use codec private options instead |
|
*/ |
|
attribute_deprecated int me_method; |
|
#endif |
|
|
|
/** |
|
* If non NULL, 'draw_horiz_band' is called by the libavcodec |
|
* decoder to draw a horizontal band. It improves cache usage. Not |
|
* all codecs can do that. You must check the codec capabilities |
|
* beforehand. |
|
* When multithreading is used, it may be called from multiple threads |
|
* at the same time; threads might draw different parts of the same AVFrame, |
|
* or multiple AVFrames, and there is no guarantee that slices will be drawn |
|
* in order. |
|
* The function is also used by hardware acceleration APIs. |
|
* It is called at least once during frame decoding to pass |
|
* the data needed for hardware render. |
|
* In that mode instead of pixel data, AVFrame points to |
|
* a structure specific to the acceleration API. The application |
|
* reads the structure and can change some fields to indicate progress |
|
* or mark state. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
* @param height the height of the slice |
|
* @param y the y position of the slice |
|
* @param type 1->top field, 2->bottom field, 3->frame |
|
* @param offset offset into the AVFrame.data from which the slice should be read |
|
*/ |
|
void (*draw_horiz_band)(struct AVCodecContext *s, |
|
const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], |
|
int y, int type, int height); |
|
|
|
/** |
|
* callback to negotiate the pixelFormat |
|
* @param fmt is the list of formats which are supported by the codec, |
|
* it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. |
|
* The first is always the native one. |
|
* @note The callback may be called again immediately if initialization for |
|
* the selected (hardware-accelerated) pixel format failed. |
|
* @warning Behavior is undefined if the callback returns a value not |
|
* in the fmt list of formats. |
|
* @return the chosen format |
|
* - encoding: unused |
|
* - decoding: Set by user, if not set the native format will be chosen. |
|
*/ |
|
enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
|
|
|
/** |
|
* maximum number of B-frames between non-B-frames |
|
* Note: The output will be delayed by max_b_frames+1 relative to the input. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int max_b_frames; |
|
|
|
/** |
|
* qscale factor between IP and B-frames |
|
* If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). |
|
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float b_quant_factor; |
|
|
|
#if FF_API_RC_STRATEGY |
|
/** @deprecated use codec private option instead */ |
|
attribute_deprecated int rc_strategy; |
|
#define FF_RC_STRATEGY_XVID 1 |
|
#endif |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int b_frame_strategy; |
|
#endif |
|
|
|
/** |
|
* qscale offset between IP and B-frames |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float b_quant_offset; |
|
|
|
/** |
|
* Size of the frame reordering buffer in the decoder. |
|
* For MPEG-2 it is 1 IPB or 0 low delay IP. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int has_b_frames; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int mpeg_quant; |
|
#endif |
|
|
|
/** |
|
* qscale factor between P- and I-frames |
|
* If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset). |
|
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float i_quant_factor; |
|
|
|
/** |
|
* qscale offset between P and I-frames |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float i_quant_offset; |
|
|
|
/** |
|
* luminance masking (0-> disabled) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float lumi_masking; |
|
|
|
/** |
|
* temporary complexity masking (0-> disabled) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float temporal_cplx_masking; |
|
|
|
/** |
|
* spatial complexity masking (0-> disabled) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float spatial_cplx_masking; |
|
|
|
/** |
|
* p block masking (0-> disabled) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float p_masking; |
|
|
|
/** |
|
* darkness masking (0-> disabled) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float dark_masking; |
|
|
|
/** |
|
* slice count |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by user (or 0). |
|
*/ |
|
int slice_count; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int prediction_method; |
|
#define FF_PRED_LEFT 0 |
|
#define FF_PRED_PLANE 1 |
|
#define FF_PRED_MEDIAN 2 |
|
#endif |
|
|
|
/** |
|
* slice offsets in the frame in bytes |
|
* - encoding: Set/allocated by libavcodec. |
|
* - decoding: Set/allocated by user (or NULL). |
|
*/ |
|
int *slice_offset; |
|
|
|
/** |
|
* sample aspect ratio (0 if unknown) |
|
* That is the width of a pixel divided by the height of the pixel. |
|
* Numerator and denominator must be relatively prime and smaller than 256 for some video standards. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
AVRational sample_aspect_ratio; |
|
|
|
/** |
|
* motion estimation comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_cmp; |
|
/** |
|
* subpixel motion estimation comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_sub_cmp; |
|
/** |
|
* macroblock comparison function (not supported yet) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_cmp; |
|
/** |
|
* interlaced DCT comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int ildct_cmp; |
|
#define FF_CMP_SAD 0 |
|
#define FF_CMP_SSE 1 |
|
#define FF_CMP_SATD 2 |
|
#define FF_CMP_DCT 3 |
|
#define FF_CMP_PSNR 4 |
|
#define FF_CMP_BIT 5 |
|
#define FF_CMP_RD 6 |
|
#define FF_CMP_ZERO 7 |
|
#define FF_CMP_VSAD 8 |
|
#define FF_CMP_VSSE 9 |
|
#define FF_CMP_NSSE 10 |
|
#define FF_CMP_W53 11 |
|
#define FF_CMP_W97 12 |
|
#define FF_CMP_DCTMAX 13 |
|
#define FF_CMP_DCT264 14 |
|
#define FF_CMP_MEDIAN_SAD 15 |
|
#define FF_CMP_CHROMA 256 |
|
|
|
/** |
|
* ME diamond size & shape |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int dia_size; |
|
|
|
/** |
|
* amount of previous MV predictors (2a+1 x 2a+1 square) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int last_predictor_count; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int pre_me; |
|
#endif |
|
|
|
/** |
|
* motion estimation prepass comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_pre_cmp; |
|
|
|
/** |
|
* ME prepass diamond size & shape |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int pre_dia_size; |
|
|
|
/** |
|
* subpel ME quality |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_subpel_quality; |
|
|
|
#if FF_API_AFD |
|
/** |
|
* DTG active format information (additional aspect ratio |
|
* information only used in DVB MPEG-2 transport streams) |
|
* 0 if not set. |
|
* |
|
* - encoding: unused |
|
* - decoding: Set by decoder. |
|
* @deprecated Deprecated in favor of AVSideData |
|
*/ |
|
attribute_deprecated int dtg_active_format; |
|
#define FF_DTG_AFD_SAME 8 |
|
#define FF_DTG_AFD_4_3 9 |
|
#define FF_DTG_AFD_16_9 10 |
|
#define FF_DTG_AFD_14_9 11 |
|
#define FF_DTG_AFD_4_3_SP_14_9 13 |
|
#define FF_DTG_AFD_16_9_SP_14_9 14 |
|
#define FF_DTG_AFD_SP_4_3 15 |
|
#endif /* FF_API_AFD */ |
|
|
|
/** |
|
* maximum motion estimation search range in subpel units |
|
* If 0 then no limit. |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_range; |
|
|
|
#if FF_API_QUANT_BIAS |
|
/** |
|
* @deprecated use encoder private option instead |
|
*/ |
|
attribute_deprecated int intra_quant_bias; |
|
#define FF_DEFAULT_QUANT_BIAS 999999 |
|
|
|
/** |
|
* @deprecated use encoder private option instead |
|
*/ |
|
attribute_deprecated int inter_quant_bias; |
|
#endif |
|
|
|
/** |
|
* slice flags |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int slice_flags; |
|
#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display |
|
#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG-2 field pics) |
|
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) |
|
|
|
#if FF_API_XVMC |
|
/** |
|
* XVideo Motion Acceleration |
|
* - encoding: forbidden |
|
* - decoding: set by decoder |
|
* @deprecated XvMC doesn't need it anymore. |
|
*/ |
|
attribute_deprecated int xvmc_acceleration; |
|
#endif /* FF_API_XVMC */ |
|
|
|
/** |
|
* macroblock decision mode |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_decision; |
|
#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp |
|
#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits |
|
#define FF_MB_DECISION_RD 2 ///< rate distortion |
|
|
|
/** |
|
* custom intra quantization matrix |
|
* - encoding: Set by user, can be NULL. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
uint16_t *intra_matrix; |
|
|
|
/** |
|
* custom inter quantization matrix |
|
* - encoding: Set by user, can be NULL. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
uint16_t *inter_matrix; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int scenechange_threshold; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int noise_reduction; |
|
#endif |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated |
|
int me_threshold; |
|
|
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated |
|
int mb_threshold; |
|
#endif |
|
|
|
/** |
|
* precision of the intra DC coefficient - 8 |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec |
|
*/ |
|
int intra_dc_precision; |
|
|
|
/** |
|
* Number of macroblock rows at the top which are skipped. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int skip_top; |
|
|
|
/** |
|
* Number of macroblock rows at the bottom which are skipped. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int skip_bottom; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float border_masking; |
|
#endif |
|
|
|
/** |
|
* minimum MB Lagrange multiplier |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_lmin; |
|
|
|
/** |
|
* maximum MB Lagrange multiplier |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_lmax; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int me_penalty_compensation; |
|
#endif |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int bidir_refine; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int brd_scale; |
|
#endif |
|
|
|
/** |
|
* minimum GOP size |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int keyint_min; |
|
|
|
/** |
|
* number of reference frames |
|
* - encoding: Set by user. |
|
* - decoding: Set by lavc. |
|
*/ |
|
int refs; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int chromaoffset; |
|
#endif |
|
|
|
#if FF_API_UNUSED_MEMBERS |
|
/** |
|
* Multiplied by qscale for each frame and added to scene_change_score. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
attribute_deprecated int scenechange_factor; |
|
#endif |
|
|
|
/** |
|
* Note: Value depends upon the compare function used for fullpel ME. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mv0_threshold; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int b_sensitivity; |
|
#endif |
|
|
|
/** |
|
* Chromaticity coordinates of the source primaries. |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
enum AVColorPrimaries color_primaries; |
|
|
|
/** |
|
* Color Transfer Characteristic. |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
enum AVColorTransferCharacteristic color_trc; |
|
|
|
/** |
|
* YUV colorspace type. |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
enum AVColorSpace colorspace; |
|
|
|
/** |
|
* MPEG vs JPEG YUV range. |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
enum AVColorRange color_range; |
|
|
|
/** |
|
* This defines the location of chroma samples. |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
enum AVChromaLocation chroma_sample_location; |
|
|
|
/** |
|
* Number of slices. |
|
* Indicates number of picture subdivisions. Used for parallelized |
|
* decoding. |
|
* - encoding: Set by user |
|
* - decoding: unused |
|
*/ |
|
int slices; |
|
|
|
/** Field order |
|
* - encoding: set by libavcodec |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVFieldOrder field_order; |
|
|
|
/* audio only */ |
|
int sample_rate; ///< samples per second |
|
int channels; ///< number of audio channels |
|
|
|
/** |
|
* audio sample format |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
enum AVSampleFormat sample_fmt; ///< sample format |
|
|
|
/* The following data should not be initialized. */ |
|
/** |
|
* Number of samples per channel in an audio frame. |
|
* |
|
* - encoding: set by libavcodec in avcodec_open2(). Each submitted frame |
|
* except the last must contain exactly frame_size samples per channel. |
|
* May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the |
|
* frame size is not restricted. |
|
* - decoding: may be set by some decoders to indicate constant frame size |
|
*/ |
|
int frame_size; |
|
|
|
/** |
|
* Frame counter, set by libavcodec. |
|
* |
|
* - decoding: total number of frames returned from the decoder so far. |
|
* - encoding: total number of frames passed to the encoder so far. |
|
* |
|
* @note the counter is not incremented if encoding/decoding resulted in |
|
* an error. |
|
*/ |
|
int frame_number; |
|
|
|
/** |
|
* number of bytes per packet if constant and known or 0 |
|
* Used by some WAV based audio codecs. |
|
*/ |
|
int block_align; |
|
|
|
/** |
|
* Audio cutoff bandwidth (0 means "automatic") |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int cutoff; |
|
|
|
/** |
|
* Audio channel layout. |
|
* - encoding: set by user. |
|
* - decoding: set by user, may be overwritten by libavcodec. |
|
*/ |
|
uint64_t channel_layout; |
|
|
|
/** |
|
* Request decoder to use this channel layout if it can (0 for default) |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
uint64_t request_channel_layout; |
|
|
|
/** |
|
* Type of service that the audio stream conveys. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
enum AVAudioServiceType audio_service_type; |
|
|
|
/** |
|
* desired sample format |
|
* - encoding: Not used. |
|
* - decoding: Set by user. |
|
* Decoder will decode to this format if it can. |
|
*/ |
|
enum AVSampleFormat request_sample_fmt; |
|
|
|
/** |
|
* This callback is called at the beginning of each frame to get data |
|
* buffer(s) for it. There may be one contiguous buffer for all the data or |
|
* there may be a buffer per each data plane or anything in between. What |
|
* this means is, you may set however many entries in buf[] you feel necessary. |
|
* Each buffer must be reference-counted using the AVBuffer API (see description |
|
* of buf[] below). |
|
* |
|
* The following fields will be set in the frame before this callback is |
|
* called: |
|
* - format |
|
* - width, height (video only) |
|
* - sample_rate, channel_layout, nb_samples (audio only) |
|
* Their values may differ from the corresponding values in |
|
* AVCodecContext. This callback must use the frame values, not the codec |
|
* context values, to calculate the required buffer size. |
|
* |
|
* This callback must fill the following fields in the frame: |
|
* - data[] |
|
* - linesize[] |
|
* - extended_data: |
|
* * if the data is planar audio with more than 8 channels, then this |
|
* callback must allocate and fill extended_data to contain all pointers |
|
* to all data planes. data[] must hold as many pointers as it can. |
|
* extended_data must be allocated with av_malloc() and will be freed in |
|
* av_frame_unref(). |
|
* * otherwise extended_data must point to data |
|
* - buf[] must contain one or more pointers to AVBufferRef structures. Each of |
|
* the frame's data and extended_data pointers must be contained in these. That |
|
* is, one AVBufferRef for each allocated chunk of memory, not necessarily one |
|
* AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), |
|
* and av_buffer_ref(). |
|
* - extended_buf and nb_extended_buf must be allocated with av_malloc() by |
|
* this callback and filled with the extra buffers if there are more |
|
* buffers than buf[] can hold. extended_buf will be freed in |
|
* av_frame_unref(). |
|
* |
|
* If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call |
|
* avcodec_default_get_buffer2() instead of providing buffers allocated by |
|
* some other means. |
|
* |
|
* Each data plane must be aligned to the maximum required by the target |
|
* CPU. |
|
* |
|
* @see avcodec_default_get_buffer2() |
|
* |
|
* Video: |
|
* |
|
* If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused |
|
* (read and/or written to if it is writable) later by libavcodec. |
|
* |
|
* avcodec_align_dimensions2() should be used to find the required width and |
|
* height, as they normally need to be rounded up to the next multiple of 16. |
|
* |
|
* Some decoders do not support linesizes changing between frames. |
|
* |
|
* If frame multithreading is used and thread_safe_callbacks is set, |
|
* this callback may be called from a different thread, but not from more |
|
* than one at once. Does not need to be reentrant. |
|
* |
|
* @see avcodec_align_dimensions2() |
|
* |
|
* Audio: |
|
* |
|
* Decoders request a buffer of a particular size by setting |
|
* AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, |
|
* however, utilize only part of the buffer by setting AVFrame.nb_samples |
|
* to a smaller value in the output frame. |
|
* |
|
* As a convenience, av_samples_get_buffer_size() and |
|
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() |
|
* functions to find the required data size and to fill data pointers and |
|
* linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
|
* since all planes must be the same size. |
|
* |
|
* @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
|
* |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec, user can override. |
|
*/ |
|
int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags); |
|
|
|
/** |
|
* If non-zero, the decoded audio and video frames returned from |
|
* avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted |
|
* and are valid indefinitely. The caller must free them with |
|
* av_frame_unref() when they are not needed anymore. |
|
* Otherwise, the decoded frames must not be freed by the caller and are |
|
* only valid until the next decode call. |
|
* |
|
* This is always automatically enabled if avcodec_receive_frame() is used. |
|
* |
|
* - encoding: unused |
|
* - decoding: set by the caller before avcodec_open2(). |
|
*/ |
|
int refcounted_frames; |
|
|
|
/* - encoding parameters */ |
|
float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0) |
|
float qblur; ///< amount of qscale smoothing over time (0.0-1.0) |
|
|
|
/** |
|
* minimum quantizer |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int qmin; |
|
|
|
/** |
|
* maximum quantizer |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int qmax; |
|
|
|
/** |
|
* maximum quantizer difference between frames |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int max_qdiff; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float rc_qsquish; |
|
|
|
attribute_deprecated |
|
float rc_qmod_amp; |
|
attribute_deprecated |
|
int rc_qmod_freq; |
|
#endif |
|
|
|
/** |
|
* decoder bitstream buffer size |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_buffer_size; |
|
|
|
/** |
|
* ratecontrol override, see RcOverride |
|
* - encoding: Allocated/set/freed by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_override_count; |
|
RcOverride *rc_override; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
const char *rc_eq; |
|
#endif |
|
|
|
/** |
|
* maximum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: Set by user, may be overwritten by libavcodec. |
|
*/ |
|
int64_t rc_max_rate; |
|
|
|
/** |
|
* minimum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int64_t rc_min_rate; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float rc_buffer_aggressivity; |
|
|
|
attribute_deprecated |
|
float rc_initial_cplx; |
|
#endif |
|
|
|
/** |
|
* Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. |
|
* - encoding: Set by user. |
|
* - decoding: unused. |
|
*/ |
|
float rc_max_available_vbv_use; |
|
|
|
/** |
|
* Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. |
|
* - encoding: Set by user. |
|
* - decoding: unused. |
|
*/ |
|
float rc_min_vbv_overflow_use; |
|
|
|
/** |
|
* Number of bits which should be loaded into the rc buffer before decoding starts. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_initial_buffer_occupancy; |
|
|
|
#if FF_API_CODER_TYPE |
|
#define FF_CODER_TYPE_VLC 0 |
|
#define FF_CODER_TYPE_AC 1 |
|
#define FF_CODER_TYPE_RAW 2 |
|
#define FF_CODER_TYPE_RLE 3 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_CODER_TYPE_DEFLATE 4 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int coder_type; |
|
#endif /* FF_API_CODER_TYPE */ |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int context_model; |
|
#endif |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int lmin; |
|
|
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int lmax; |
|
#endif |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int frame_skip_threshold; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int frame_skip_factor; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int frame_skip_exp; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int frame_skip_cmp; |
|
#endif /* FF_API_PRIVATE_OPT */ |
|
|
|
/** |
|
* trellis RD quantization |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int trellis; |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int min_prediction_order; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int max_prediction_order; |
|
|
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int64_t timecode_frame_start; |
|
#endif |
|
|
|
#if FF_API_RTP_CALLBACK |
|
/** |
|
* @deprecated unused |
|
*/ |
|
/* The RTP callback: This function is called */ |
|
/* every time the encoder has a packet to send. */ |
|
/* It depends on the encoder if the data starts */ |
|
/* with a Start Code (it should). H.263 does. */ |
|
/* mb_nb contains the number of macroblocks */ |
|
/* encoded in the RTP payload. */ |
|
attribute_deprecated |
|
void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); |
|
#endif |
|
|
|
#if FF_API_PRIVATE_OPT |
|
/** @deprecated use encoder private options instead */ |
|
attribute_deprecated |
|
int rtp_payload_size; /* The size of the RTP payload: the coder will */ |
|
/* do its best to deliver a chunk with size */ |
|
/* below rtp_payload_size, the chunk will start */ |
|
/* with a start code on some codecs like H.263. */ |
|
/* This doesn't take account of any particular */ |
|
/* headers inside the transmitted RTP payload. */ |
|
#endif |
|
|
|
#if FF_API_STAT_BITS |
|
/* statistics, used for 2-pass encoding */ |
|
attribute_deprecated |
|
int mv_bits; |
|
attribute_deprecated |
|
int header_bits; |
|
attribute_deprecated |
|
int i_tex_bits; |
|
attribute_deprecated |
|
int p_tex_bits; |
|
attribute_deprecated |
|
int i_count; |
|
attribute_deprecated |
|
int p_count; |
|
attribute_deprecated |
|
int skip_count; |
|
attribute_deprecated |
|
int misc_bits; |
|
|
|
/** @deprecated this field is unused */ |
|
attribute_deprecated |
|
int frame_bits; |
|
#endif |
|
|
|
/** |
|
* pass1 encoding statistics output buffer |
|
* - encoding: Set by libavcodec. |
|
* - decoding: unused |
|
*/ |
|
char *stats_out; |
|
|
|
/** |
|
* pass2 encoding statistics input buffer |
|
* Concatenated stuff from stats_out of pass1 should be placed here. |
|
* - encoding: Allocated/set/freed by user. |
|
* - decoding: unused |
|
*/ |
|
char *stats_in; |
|
|
|
/** |
|
* Work around bugs in encoders which sometimes cannot be detected automatically. |
|
* - encoding: Set by user |
|
* - decoding: Set by user |
|
*/ |
|
int workaround_bugs; |
|
#define FF_BUG_AUTODETECT 1 ///< autodetection |
|
#if FF_API_OLD_MSMPEG4 |
|
#define FF_BUG_OLD_MSMPEG4 2 |
|
#endif |
|
#define FF_BUG_XVID_ILACE 4 |
|
#define FF_BUG_UMP4 8 |
|
#define FF_BUG_NO_PADDING 16 |
|
#define FF_BUG_AMV 32 |
|
#if FF_API_AC_VLC |
|
#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
|
#endif |
|
#define FF_BUG_QPEL_CHROMA 64 |
|
#define FF_BUG_STD_QPEL 128 |
|
#define FF_BUG_QPEL_CHROMA2 256 |
|
#define FF_BUG_DIRECT_BLOCKSIZE 512 |
|
#define FF_BUG_EDGE 1024 |
|
#define FF_BUG_HPEL_CHROMA 2048 |
|
#define FF_BUG_DC_CLIP 4096 |
|
#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders. |
|
#define FF_BUG_TRUNCATED 16384 |
|
#define FF_BUG_IEDGE 32768 |
|
|
|
/** |
|
* strictly follow the standard (MPEG-4, ...). |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
* Setting this to STRICT or higher means the encoder and decoder will |
|
* generally do stupid things, whereas setting it to unofficial or lower |
|
* will mean the encoder might produce output that is not supported by all |
|
* spec-compliant decoders. Decoders don't differentiate between normal, |
|
* unofficial and experimental (that is, they always try to decode things |
|
* when they can) unless they are explicitly asked to behave stupidly |
|
* (=strictly conform to the specs) |
|
*/ |
|
int strict_std_compliance; |
|
#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. |
|
#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. |
|
#define FF_COMPLIANCE_NORMAL 0 |
|
#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions |
|
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. |
|
|
|
/** |
|
* error concealment flags |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int error_concealment; |
|
#define FF_EC_GUESS_MVS 1 |
|
#define FF_EC_DEBLOCK 2 |
|
#define FF_EC_FAVOR_INTER 256 |
|
|
|
/** |
|
* debug |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int debug; |
|
#define FF_DEBUG_PICT_INFO 1 |
|
#define FF_DEBUG_RC 2 |
|
#define FF_DEBUG_BITSTREAM 4 |
|
#define FF_DEBUG_MB_TYPE 8 |
|
#define FF_DEBUG_QP 16 |
|
#if FF_API_DEBUG_MV |
|
/** |
|
* @deprecated this option does nothing |
|
*/ |
|
#define FF_DEBUG_MV 32 |
|
#endif |
|
#define FF_DEBUG_DCT_COEFF 0x00000040 |
|
#define FF_DEBUG_SKIP 0x00000080 |
|
#define FF_DEBUG_STARTCODE 0x00000100 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_DEBUG_PTS 0x00000200 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
#define FF_DEBUG_ER 0x00000400 |
|
#define FF_DEBUG_MMCO 0x00000800 |
|
#define FF_DEBUG_BUGS 0x00001000 |
|
#if FF_API_DEBUG_MV |
|
#define FF_DEBUG_VIS_QP 0x00002000 |
|
#define FF_DEBUG_VIS_MB_TYPE 0x00004000 |
|
#endif |
|
#define FF_DEBUG_BUFFERS 0x00008000 |
|
#define FF_DEBUG_THREADS 0x00010000 |
|
#define FF_DEBUG_GREEN_MD 0x00800000 |
|
#define FF_DEBUG_NOMC 0x01000000 |
|
|
|
#if FF_API_DEBUG_MV |
|
/** |
|
* debug |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int debug_mv; |
|
#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 // visualize forward predicted MVs of P-frames |
|
#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 // visualize forward predicted MVs of B-frames |
|
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 // visualize backward predicted MVs of B-frames |
|
#endif |
|
|
|
/** |
|
* Error recognition; may misdetect some more or less valid parts as errors. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int err_recognition; |
|
|
|
/** |
|
* Verify checksums embedded in the bitstream (could be of either encoded or |
|
* decoded data, depending on the codec) and print an error message on mismatch. |
|
* If AV_EF_EXPLODE is also set, a mismatching checksum will result in the |
|
* decoder returning an error. |
|
*/ |
|
#define AV_EF_CRCCHECK (1<<0) |
|
#define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations |
|
#define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length |
|
#define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection |
|
|
|
#define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue |
|
#define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors |
|
#define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors |
|
#define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error |
|
|
|
|
|
/** |
|
* opaque 64-bit number (generally a PTS) that will be reordered and |
|
* output in AVFrame.reordered_opaque |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int64_t reordered_opaque; |
|
|
|
/** |
|
* Hardware accelerator in use |
|
* - encoding: unused. |
|
* - decoding: Set by libavcodec |
|
*/ |
|
struct AVHWAccel *hwaccel; |
|
|
|
/** |
|
* Hardware accelerator context. |
|
* For some hardware accelerators, a global context needs to be |
|
* provided by the user. In that case, this holds display-dependent |
|
* data FFmpeg cannot instantiate itself. Please refer to the |
|
* FFmpeg HW accelerator documentation to know how to fill this |
|
* is. e.g. for VA API, this is a struct vaapi_context. |
|
* - encoding: unused |
|
* - decoding: Set by user |
|
*/ |
|
void *hwaccel_context; |
|
|
|
/** |
|
* error |
|
* - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR. |
|
* - decoding: unused |
|
*/ |
|
uint64_t error[AV_NUM_DATA_POINTERS]; |
|
|
|
/** |
|
* DCT algorithm, see FF_DCT_* below |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int dct_algo; |
|
#define FF_DCT_AUTO 0 |
|
#define FF_DCT_FASTINT 1 |
|
#define FF_DCT_INT 2 |
|
#define FF_DCT_MMX 3 |
|
#define FF_DCT_ALTIVEC 5 |
|
#define FF_DCT_FAAN 6 |
|
|
|
/** |
|
* IDCT algorithm, see FF_IDCT_* below. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int idct_algo; |
|
#define FF_IDCT_AUTO 0 |
|
#define FF_IDCT_INT 1 |
|
#define FF_IDCT_SIMPLE 2 |
|
#define FF_IDCT_SIMPLEMMX 3 |
|
#define FF_IDCT_ARM 7 |
|
#define FF_IDCT_ALTIVEC 8 |
|
#if FF_API_ARCH_SH4 |
|
#define FF_IDCT_SH4 9 |
|
#endif |
|
#define FF_IDCT_SIMPLEARM 10 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_IDCT_IPP 13 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
#define FF_IDCT_XVID 14 |
|
#if FF_API_IDCT_XVIDMMX |
|
#define FF_IDCT_XVIDMMX 14 |
|
#endif /* FF_API_IDCT_XVIDMMX */ |
|
#define FF_IDCT_SIMPLEARMV5TE 16 |
|
#define FF_IDCT_SIMPLEARMV6 17 |
|
#if FF_API_ARCH_SPARC |
|
#define FF_IDCT_SIMPLEVIS 18 |
|
#endif |
|
#define FF_IDCT_FAAN 20 |
|
#define FF_IDCT_SIMPLENEON 22 |
|
#if FF_API_ARCH_ALPHA |
|
#define FF_IDCT_SIMPLEALPHA 23 |
|
#endif |
|
#define FF_IDCT_SIMPLEAUTO 128 |
|
|
|
/** |
|
* bits per sample/pixel from the demuxer (needed for huffyuv). |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by user. |
|
*/ |
|
int bits_per_coded_sample; |
|
|
|
/** |
|
* Bits per sample/pixel of internal libavcodec pixel/sample format. |
|
* - encoding: set by user. |
|
* - decoding: set by libavcodec. |
|
*/ |
|
int bits_per_raw_sample; |
|
|
|
#if FF_API_LOWRES |
|
/** |
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int lowres; |
|
#endif |
|
|
|
#if FF_API_CODED_FRAME |
|
/** |
|
* the picture in the bitstream |
|
* - encoding: Set by libavcodec. |
|
* - decoding: unused |
|
* |
|
* @deprecated use the quality factor packet side data instead |
|
*/ |
|
attribute_deprecated AVFrame *coded_frame; |
|
#endif |
|
|
|
/** |
|
* thread count |
|
* is used to decide how many independent tasks should be passed to execute() |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int thread_count; |
|
|
|
/** |
|
* Which multithreading methods to use. |
|
* Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, |
|
* so clients which cannot provide future frames should not use it. |
|
* |
|
* - encoding: Set by user, otherwise the default is used. |
|
* - decoding: Set by user, otherwise the default is used. |
|
*/ |
|
int thread_type; |
|
#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once |
|
#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once |
|
|
|
/** |
|
* Which multithreading methods are in use by the codec. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int active_thread_type; |
|
|
|
/** |
|
* Set by the client if its custom get_buffer() callback can be called |
|
* synchronously from another thread, which allows faster multithreaded decoding. |
|
* draw_horiz_band() will be called from other threads regardless of this setting. |
|
* Ignored if the default get_buffer() is used. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int thread_safe_callbacks; |
|
|
|
/** |
|
* The codec may call this to execute several independent things. |
|
* It will return only after finishing all tasks. |
|
* The user may replace this with some multithreaded implementation, |
|
* the default implementation will execute the parts serially. |
|
* @param count the number of things to execute |
|
* - encoding: Set by libavcodec, user can override. |
|
* - decoding: Set by libavcodec, user can override. |
|
*/ |
|
int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size); |
|
|
|
/** |
|
* The codec may call this to execute several independent things. |
|
* It will return only after finishing all tasks. |
|
* The user may replace this with some multithreaded implementation, |
|
* the default implementation will execute the parts serially. |
|
* Also see avcodec_thread_init and e.g. the --enable-pthread configure option. |
|
* @param c context passed also to func |
|
* @param count the number of things to execute |
|
* @param arg2 argument passed unchanged to func |
|
* @param ret return values of executed functions, must have space for "count" values. May be NULL. |
|
* @param func function that will be called count times, with jobnr from 0 to count-1. |
|
* threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no |
|
* two instances of func executing at the same time will have the same threadnr. |
|
* @return always 0 currently, but code should handle a future improvement where when any call to func |
|
* returns < 0 no further calls to func may be done and < 0 is returned. |
|
* - encoding: Set by libavcodec, user can override. |
|
* - decoding: Set by libavcodec, user can override. |
|
*/ |
|
int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); |
|
|
|
/** |
|
* noise vs. sse weight for the nsse comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int nsse_weight; |
|
|
|
/** |
|
* profile |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int profile; |
|
#define FF_PROFILE_UNKNOWN -99 |
|
#define FF_PROFILE_RESERVED -100 |
|
|
|
#define FF_PROFILE_AAC_MAIN 0 |
|
#define FF_PROFILE_AAC_LOW 1 |
|
#define FF_PROFILE_AAC_SSR 2 |
|
#define FF_PROFILE_AAC_LTP 3 |
|
#define FF_PROFILE_AAC_HE 4 |
|
#define FF_PROFILE_AAC_HE_V2 28 |
|
#define FF_PROFILE_AAC_LD 22 |
|
#define FF_PROFILE_AAC_ELD 38 |
|
#define FF_PROFILE_MPEG2_AAC_LOW 128 |
|
#define FF_PROFILE_MPEG2_AAC_HE 131 |
|
|
|
#define FF_PROFILE_DNXHD 0 |
|
#define FF_PROFILE_DNXHR_LB 1 |
|
#define FF_PROFILE_DNXHR_SQ 2 |
|
#define FF_PROFILE_DNXHR_HQ 3 |
|
#define FF_PROFILE_DNXHR_HQX 4 |
|
#define FF_PROFILE_DNXHR_444 5 |
|
|
|
#define FF_PROFILE_DTS 20 |
|
#define FF_PROFILE_DTS_ES 30 |
|
#define FF_PROFILE_DTS_96_24 40 |
|
#define FF_PROFILE_DTS_HD_HRA 50 |
|
#define FF_PROFILE_DTS_HD_MA 60 |
|
#define FF_PROFILE_DTS_EXPRESS 70 |
|
|
|
#define FF_PROFILE_MPEG2_422 0 |
|
#define FF_PROFILE_MPEG2_HIGH 1 |
|
#define FF_PROFILE_MPEG2_SS 2 |
|
#define FF_PROFILE_MPEG2_SNR_SCALABLE 3 |
|
#define FF_PROFILE_MPEG2_MAIN 4 |
|
#define FF_PROFILE_MPEG2_SIMPLE 5 |
|
|
|
#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag |
|
#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag |
|
|
|
#define FF_PROFILE_H264_BASELINE 66 |
|
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) |
|
#define FF_PROFILE_H264_MAIN 77 |
|
#define FF_PROFILE_H264_EXTENDED 88 |
|
#define FF_PROFILE_H264_HIGH 100 |
|
#define FF_PROFILE_H264_HIGH_10 110 |
|
#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) |
|
#define FF_PROFILE_H264_MULTIVIEW_HIGH 118 |
|
#define FF_PROFILE_H264_HIGH_422 122 |
|
#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) |
|
#define FF_PROFILE_H264_STEREO_HIGH 128 |
|
#define FF_PROFILE_H264_HIGH_444 144 |
|
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 |
|
#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) |
|
#define FF_PROFILE_H264_CAVLC_444 44 |
|
|
|
#define FF_PROFILE_VC1_SIMPLE 0 |
|
#define FF_PROFILE_VC1_MAIN 1 |
|
#define FF_PROFILE_VC1_COMPLEX 2 |
|
#define FF_PROFILE_VC1_ADVANCED 3 |
|
|
|
#define FF_PROFILE_MPEG4_SIMPLE 0 |
|
#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 |
|
#define FF_PROFILE_MPEG4_CORE 2 |
|
#define FF_PROFILE_MPEG4_MAIN 3 |
|
#define FF_PROFILE_MPEG4_N_BIT 4 |
|
#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 |
|
#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 |
|
#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 |
|
#define FF_PROFILE_MPEG4_HYBRID 8 |
|
#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 |
|
#define FF_PROFILE_MPEG4_CORE_SCALABLE 10 |
|
#define FF_PROFILE_MPEG4_ADVANCED_CODING 11 |
|
#define FF_PROFILE_MPEG4_ADVANCED_CORE 12 |
|
#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 |
|
#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 |
|
#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 |
|
|
|
#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1 |
|
#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2 |
|
#define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768 |
|
#define FF_PROFILE_JPEG2000_DCINEMA_2K 3 |
|
#define FF_PROFILE_JPEG2000_DCINEMA_4K 4 |
|
|
|
#define FF_PROFILE_VP9_0 0 |
|
#define FF_PROFILE_VP9_1 1 |
|
#define FF_PROFILE_VP9_2 2 |
|
#define FF_PROFILE_VP9_3 3 |
|
|
|
#define FF_PROFILE_HEVC_MAIN 1 |
|
#define FF_PROFILE_HEVC_MAIN_10 2 |
|
#define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 |
|
#define FF_PROFILE_HEVC_REXT 4 |
|
|
|
/** |
|
* level |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int level; |
|
#define FF_LEVEL_UNKNOWN -99 |
|
|
|
/** |
|
* Skip loop filtering for selected frames. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVDiscard skip_loop_filter; |
|
|
|
/** |
|
* Skip IDCT/dequantization for selected frames. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVDiscard skip_idct; |
|
|
|
/** |
|
* Skip decoding for selected frames. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVDiscard skip_frame; |
|
|
|
/** |
|
* Header containing style information for text subtitles. |
|
* For SUBTITLE_ASS subtitle type, it should contain the whole ASS |
|
* [Script Info] and [V4+ Styles] section, plus the [Events] line and |
|
* the Format line following. It shouldn't include any Dialogue line. |
|
* - encoding: Set/allocated/freed by user (before avcodec_open2()) |
|
* - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) |
|
*/ |
|
uint8_t *subtitle_header; |
|
int subtitle_header_size; |
|
|
|
#if FF_API_ERROR_RATE |
|
/** |
|
* @deprecated use the 'error_rate' private AVOption of the mpegvideo |
|
* encoders |
|
*/ |
|
attribute_deprecated |
|
int error_rate; |
|
#endif |
|
|
|
#if FF_API_VBV_DELAY |
|
/** |
|
* VBV delay coded in the last frame (in periods of a 27 MHz clock). |
|
* Used for compliant TS muxing. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: unused. |
|
* @deprecated this value is now exported as a part of |
|
* AV_PKT_DATA_CPB_PROPERTIES packet side data |
|
*/ |
|
attribute_deprecated |
|
uint64_t vbv_delay; |
|
#endif |
|
|
|
#if FF_API_SIDEDATA_ONLY_PKT |
|
/** |
|
* Encoding only and set by default. Allow encoders to output packets |
|
* that do not contain any encoded data, only side data. |
|
* |
|
* Some encoders need to output such packets, e.g. to update some stream |
|
* parameters at the end of encoding. |
|
* |
|
* @deprecated this field disables the default behaviour and |
|
* it is kept only for compatibility. |
|
*/ |
|
attribute_deprecated |
|
int side_data_only_packets; |
|
#endif |
|
|
|
/** |
|
* Audio only. The number of "priming" samples (padding) inserted by the |
|
* encoder at the beginning of the audio. I.e. this number of leading |
|
* decoded samples must be discarded by the caller to get the original audio |
|
* without leading padding. |
|
* |
|
* - decoding: unused |
|
* - encoding: Set by libavcodec. The timestamps on the output packets are |
|
* adjusted by the encoder so that they always refer to the |
|
* first sample of the data actually contained in the packet, |
|
* including any added padding. E.g. if the timebase is |
|
* 1/samplerate and the timestamp of the first input sample is |
|
* 0, the timestamp of the first output packet will be |
|
* -initial_padding. |
|
*/ |
|
int initial_padding; |
|
|
|
/** |
|
* - decoding: For codecs that store a framerate value in the compressed |
|
* bitstream, the decoder may export it here. { 0, 1} when |
|
* unknown. |
|
* - encoding: May be used to signal the framerate of CFR content to an |
|
* encoder. |
|
*/ |
|
AVRational framerate; |
|
|
|
/** |
|
* Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx. |
|
* - encoding: unused. |
|
* - decoding: Set by libavcodec before calling get_format() |
|
*/ |
|
enum AVPixelFormat sw_pix_fmt; |
|
|
|
/** |
|
* Timebase in which pkt_dts/pts and AVPacket.dts/pts are. |
|
* - encoding unused. |
|
* - decoding set by user. |
|
*/ |
|
AVRational pkt_timebase; |
|
|
|
/** |
|
* AVCodecDescriptor |
|
* - encoding: unused. |
|
* - decoding: set by libavcodec. |
|
*/ |
|
const AVCodecDescriptor *codec_descriptor; |
|
|
|
#if !FF_API_LOWRES |
|
/** |
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int lowres; |
|
#endif |
|
|
|
/** |
|
* Current statistics for PTS correction. |
|
* - decoding: maintained and used by libavcodec, not intended to be used by user apps |
|
* - encoding: unused |
|
*/ |
|
int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far |
|
int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far |
|
int64_t pts_correction_last_pts; /// PTS of the last frame |
|
int64_t pts_correction_last_dts; /// DTS of the last frame |
|
|
|
/** |
|
* Character encoding of the input subtitles file. |
|
* - decoding: set by user |
|
* - encoding: unused |
|
*/ |
|
char *sub_charenc; |
|
|
|
/** |
|
* Subtitles character encoding mode. Formats or codecs might be adjusting |
|
* this setting (if they are doing the conversion themselves for instance). |
|
* - decoding: set by libavcodec |
|
* - encoding: unused |
|
*/ |
|
int sub_charenc_mode; |
|
#define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance) |
|
#define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself |
|
#define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv |
|
|
|
/** |
|
* Skip processing alpha if supported by codec. |
|
* Note that if the format uses pre-multiplied alpha (common with VP6, |
|
* and recommended due to better video quality/compression) |
|
* the image will look as if alpha-blended onto a black background. |
|
* However for formats that do not use pre-multiplied alpha |
|
* there might be serious artefacts (though e.g. libswscale currently |
|
* assumes pre-multiplied alpha anyway). |
|
* |
|
* - decoding: set by user |
|
* - encoding: unused |
|
*/ |
|
int skip_alpha; |
|
|
|
/** |
|
* Number of samples to skip after a discontinuity |
|
* - decoding: unused |
|
* - encoding: set by libavcodec |
|
*/ |
|
int seek_preroll; |
|
|
|
#if !FF_API_DEBUG_MV |
|
/** |
|
* debug motion vectors |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int debug_mv; |
|
#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames |
|
#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames |
|
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames |
|
#endif |
|
|
|
/** |
|
* custom intra quantization matrix |
|
* - encoding: Set by user, can be NULL. |
|
* - decoding: unused. |
|
*/ |
|
uint16_t *chroma_intra_matrix; |
|
|
|
/** |
|
* dump format separator. |
|
* can be ", " or "\n " or anything else |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
uint8_t *dump_separator; |
|
|
|
/** |
|
* ',' separated list of allowed decoders. |
|
* If NULL then all are allowed |
|
* - encoding: unused |
|
* - decoding: set by user |
|
*/ |
|
char *codec_whitelist; |
|
|
|
/* |
|
* Properties of the stream that gets decoded |
|
* - encoding: unused |
|
* - decoding: set by libavcodec |
|
*/ |
|
unsigned properties; |
|
#define FF_CODEC_PROPERTY_LOSSLESS 0x00000001 |
|
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002 |
|
|
|
/** |
|
* Additional data associated with the entire coded stream. |
|
* |
|
* - decoding: unused |
|
* - encoding: may be set by libavcodec after avcodec_open2(). |
|
*/ |
|
AVPacketSideData *coded_side_data; |
|
int nb_coded_side_data; |
|
|
|
/** |
|
* A reference to the AVHWFramesContext describing the input (for encoding) |
|
* or output (decoding) frames. The reference is set by the caller and |
|
* afterwards owned (and freed) by libavcodec - it should never be read by |
|
* the caller after being set. |
|
* |
|
* - decoding: This field should be set by the caller from the get_format() |
|
* callback. The previous reference (if any) will always be |
|
* unreffed by libavcodec before the get_format() call. |
|
* |
|
* If the default get_buffer2() is used with a hwaccel pixel |
|
* format, then this AVHWFramesContext will be used for |
|
* allocating the frame buffers. |
|
* |
|
* - encoding: For hardware encoders configured to use a hwaccel pixel |
|
* format, this field should be set by the caller to a reference |
|
* to the AVHWFramesContext describing input frames. |
|
* AVHWFramesContext.format must be equal to |
|
* AVCodecContext.pix_fmt. |
|
* |
|
* This field should be set before avcodec_open2() is called. |
|
*/ |
|
AVBufferRef *hw_frames_ctx; |
|
|
|
/** |
|
* Control the form of AVSubtitle.rects[N]->ass |
|
* - decoding: set by user |
|
* - encoding: unused |
|
*/ |
|
int sub_text_format; |
|
#define FF_SUB_TEXT_FMT_ASS 0 |
|
#if FF_API_ASS_TIMING |
|
#define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS 1 |
|
#endif |
|
|
|
/** |
|
* Audio only. The amount of padding (in samples) appended by the encoder to |
|
* the end of the audio. I.e. this number of decoded samples must be |
|
* discarded by the caller from the end of the stream to get the original |
|
* audio without any trailing padding. |
|
* |
|
* - decoding: unused |
|
* - encoding: unused |
|
*/ |
|
int trailing_padding; |
|
|
|
/** |
|
* The number of pixels per image to maximally accept. |
|
* |
|
* - decoding: set by user |
|
* - encoding: set by user |
|
*/ |
|
int64_t max_pixels; |
|
|
|
/** |
|
* A reference to the AVHWDeviceContext describing the device which will |
|
* be used by a hardware encoder/decoder. The reference is set by the |
|
* caller and afterwards owned (and freed) by libavcodec. |
|
* |
|
* This should be used if either the codec device does not require |
|
* hardware frames or any that are used are to be allocated internally by |
|
* libavcodec. If the user wishes to supply any of the frames used as |
|
* encoder input or decoder output then hw_frames_ctx should be used |
|
* instead. When hw_frames_ctx is set in get_format() for a decoder, this |
|
* field will be ignored while decoding the associated stream segment, but |
|
* may again be used on a following one after another get_format() call. |
|
* |
|
* For both encoders and decoders this field should be set before |
|
* avcodec_open2() is called and must not be written to thereafter. |
|
* |
|
* Note that some decoders may require this field to be set initially in |
|
* order to support hw_frames_ctx at all - in that case, all frames |
|
* contexts used must be created on the same device. |
|
*/ |
|
AVBufferRef *hw_device_ctx; |
|
|
|
/** |
|
* Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated |
|
* decoding (if active). |
|
* - encoding: unused |
|
* - decoding: Set by user (either before avcodec_open2(), or in the |
|
* AVCodecContext.get_format callback) |
|
*/ |
|
int hwaccel_flags; |
|
|
|
/** |
|
* Video decoding only. Certain video codecs support cropping, meaning that |
|
* only a sub-rectangle of the decoded frame is intended for display. This |
|
* option controls how cropping is handled by libavcodec. |
|
* |
|
* When set to 1 (the default), libavcodec will apply cropping internally. |
|
* I.e. it will modify the output frame width/height fields and offset the |
|
* data pointers (only by as much as possible while preserving alignment, or |
|
* by the full amount if the AV_CODEC_FLAG_UNALIGNED flag is set) so that |
|
* the frames output by the decoder refer only to the cropped area. The |
|
* crop_* fields of the output frames will be zero. |
|
* |
|
* When set to 0, the width/height fields of the output frames will be set |
|
* to the coded dimensions and the crop_* fields will describe the cropping |
|
* rectangle. Applying the cropping is left to the caller. |
|
* |
|
* @warning When hardware acceleration with opaque output frames is used, |
|
* libavcodec is unable to apply cropping from the top/left border. |
|
* |
|
* @note when this option is set to zero, the width/height fields of the |
|
* AVCodecContext and output AVFrames have different meanings. The codec |
|
* context fields store display dimensions (with the coded dimensions in |
|
* coded_width/height), while the frame fields store the coded dimensions |
|
* (with the display dimensions being determined by the crop_* fields). |
|
*/ |
|
int apply_cropping; |
|
} AVCodecContext; |
|
|
|
AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx); |
|
void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val); |
|
|
|
const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx); |
|
void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc); |
|
|
|
unsigned av_codec_get_codec_properties(const AVCodecContext *avctx); |
|
|
|
int av_codec_get_lowres(const AVCodecContext *avctx); |
|
void av_codec_set_lowres(AVCodecContext *avctx, int val); |
|
|
|
int av_codec_get_seek_preroll(const AVCodecContext *avctx); |
|
void av_codec_set_seek_preroll(AVCodecContext *avctx, int val); |
|
|
|
uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx); |
|
void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val); |
|
|
|
/** |
|
* AVProfile. |
|
*/ |
|
typedef struct AVProfile { |
|
int profile; |
|
const char *name; ///< short name for the profile |
|
} AVProfile; |
|
|
|
typedef struct AVCodecDefault AVCodecDefault; |
|
|
|
struct AVSubtitle; |
|
|
|
/** |
|
* AVCodec. |
|
*/ |
|
typedef struct AVCodec { |
|
/** |
|
* Name of the codec implementation. |
|
* The name is globally unique among encoders and among decoders (but an |
|
* encoder and a decoder can share the same name). |
|
* This is the primary way to find a codec from the user perspective. |
|
*/ |
|
const char *name; |
|
/** |
|
* Descriptive name for the codec, meant to be more human readable than name. |
|
* You should use the NULL_IF_CONFIG_SMALL() macro to define it. |
|
*/ |
|
const char *long_name; |
|
enum AVMediaType type; |
|
enum AVCodecID id; |
|
/** |
|
* Codec capabilities. |
|
* see AV_CODEC_CAP_* |
|
*/ |
|
int capabilities; |
|
const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} |
|
const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 |
|
const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 |
|
const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 |
|
const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 |
|
uint8_t max_lowres; ///< maximum value for lowres supported by the decoder |
|
const AVClass *priv_class; ///< AVClass for the private context |
|
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN} |
|
|
|
/***************************************************************** |
|
* No fields below this line are part of the public API. They |
|
* may not be used outside of libavcodec and can be changed and |
|
* removed at will. |
|
* New public fields should be added right above. |
|
***************************************************************** |
|
*/ |
|
int priv_data_size; |
|
struct AVCodec *next; |
|
/** |
|
* @name Frame-level threading support functions |
|
* @{ |
|
*/ |
|
/** |
|
* If defined, called on thread contexts when they are created. |
|
* If the codec allocates writable tables in init(), re-allocate them here. |
|
* priv_data will be set to a copy of the original. |
|
*/ |
|
int (*init_thread_copy)(AVCodecContext *); |
|
/** |
|
* Copy necessary context variables from a previous thread context to the current one. |
|
* If not defined, the next thread will start automatically; otherwise, the codec |
|
* must call ff_thread_finish_setup(). |
|
* |
|
* dst and src will (rarely) point to the same context, in which case memcpy should be skipped. |
|
*/ |
|
int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); |
|
/** @} */ |
|
|
|
/** |
|
* Private codec-specific defaults. |
|
*/ |
|
const AVCodecDefault *defaults; |
|
|
|
/** |
|
* Initialize codec static data, called from avcodec_register(). |
|
*/ |
|
void (*init_static_data)(struct AVCodec *codec); |
|
|
|
int (*init)(AVCodecContext *); |
|
int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, |
|
const struct AVSubtitle *sub); |
|
/** |
|
* Encode data to an AVPacket. |
|
* |
|
* @param avctx codec context |
|
* @param avpkt output AVPacket (may contain a user-provided buffer) |
|
* @param[in] frame AVFrame containing the raw data to be encoded |
|
* @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a |
|
* non-empty packet was returned in avpkt. |
|
* @return 0 on success, negative error code on failure |
|
*/ |
|
int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, |
|
int *got_packet_ptr); |
|
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); |
|
int (*close)(AVCodecContext *); |
|
/** |
|
* Encode API with decoupled packet/frame dataflow. The API is the |
|
* same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except |
|
* that: |
|
* - never called if the codec is closed or the wrong type, |
|
* - if AV_CODEC_CAP_DELAY is not set, drain frames are never sent, |
|
* - only one drain frame is ever passed down, |
|
*/ |
|
int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame); |
|
int (*receive_packet)(AVCodecContext *avctx, AVPacket *avpkt); |
|
|
|
/** |
|
* Decode API with decoupled packet/frame dataflow. This function is called |
|
* to get one output frame. It should call ff_decode_get_packet() to obtain |
|
* input data. |
|
*/ |
|
int (*receive_frame)(AVCodecContext *avctx, AVFrame *frame); |
|
/** |
|
* Flush buffers. |
|
* Will be called when seeking |
|
*/ |
|
void (*flush)(AVCodecContext *); |
|
/** |
|
* Internal codec capabilities. |
|
* See FF_CODEC_CAP_* in internal.h |
|
*/ |
|
int caps_internal; |
|
|
|
/** |
|
* Decoding only, a comma-separated list of bitstream filters to apply to |
|
* packets before decoding. |
|
*/ |
|
const char *bsfs; |
|
} AVCodec; |
|
|
|
int av_codec_get_max_lowres(const AVCodec *codec); |
|
|
|
struct MpegEncContext; |
|
|
|
/** |
|
* @defgroup lavc_hwaccel AVHWAccel |
|
* @{ |
|
*/ |
|
typedef struct AVHWAccel { |
|
/** |
|
* Name of the hardware accelerated codec. |
|
* The name is globally unique among encoders and among decoders (but an |
|
* encoder and a decoder can share the same name). |
|
*/ |
|
const char *name; |
|
|
|
/** |
|
* Type of codec implemented by the hardware accelerator. |
|
* |
|
* See AVMEDIA_TYPE_xxx |
|
*/ |
|
enum AVMediaType type; |
|
|
|
/** |
|
* Codec implemented by the hardware accelerator. |
|
* |
|
* See AV_CODEC_ID_xxx |
|
*/ |
|
enum AVCodecID id; |
|
|
|
/** |
|
* Supported pixel format. |
|
* |
|
* Only hardware accelerated formats are supported here. |
|
*/ |
|
enum AVPixelFormat pix_fmt; |
|
|
|
/** |
|
* Hardware accelerated codec capabilities. |
|
* see AV_HWACCEL_CODEC_CAP_* |
|
*/ |
|
int capabilities; |
|
|
|
/***************************************************************** |
|
* No fields below this line are part of the public API. They |
|
* may not be used outside of libavcodec and can be changed and |
|
* removed at will. |
|
* New public fields should be added right above. |
|
***************************************************************** |
|
*/ |
|
struct AVHWAccel *next; |
|
|
|
/** |
|
* Allocate a custom buffer |
|
*/ |
|
int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); |
|
|
|
/** |
|
* Called at the beginning of each frame or field picture. |
|
* |
|
* Meaningful frame information (codec specific) is guaranteed to |
|
* be parsed at this point. This function is mandatory. |
|
* |
|
* Note that buf can be NULL along with buf_size set to 0. |
|
* Otherwise, this means the whole frame is available at this point. |
|
* |
|
* @param avctx the codec context |
|
* @param buf the frame data buffer base |
|
* @param buf_size the size of the frame in bytes |
|
* @return zero if successful, a negative value otherwise |
|
*/ |
|
int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
|
|
|
/** |
|
* Callback for each slice. |
|
* |
|
* Meaningful slice information (codec specific) is guaranteed to |
|
* be parsed at this point. This function is mandatory. |
|
* The only exception is XvMC, that works on MB level. |
|
* |
|
* @param avctx the codec context |
|
* @param buf the slice data buffer base |
|
* @param buf_size the size of the slice in bytes |
|
* @return zero if successful, a negative value otherwise |
|
*/ |
|
int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
|
|
|
/** |
|
* Called at the end of each frame or field picture. |
|
* |
|
* The whole picture is parsed at this point and can now be sent |
|
* to the hardware accelerator. This function is mandatory. |
|
* |
|
* @param avctx the codec context |
|
* @return zero if successful, a negative value otherwise |
|
*/ |
|
int (*end_frame)(AVCodecContext *avctx); |
|
|
|
/** |
|
* Size of per-frame hardware accelerator private data. |
|
* |
|
* Private data is allocated with av_mallocz() before |
|
* AVCodecContext.get_buffer() and deallocated after |
|
* AVCodecContext.release_buffer(). |
|
*/ |
|
int frame_priv_data_size; |
|
|
|
/** |
|
* Called for every Macroblock in a slice. |
|
* |
|
* XvMC uses it to replace the ff_mpv_reconstruct_mb(). |
|
* Instead of decoding to raw picture, MB parameters are |
|
* stored in an array provided by the video driver. |
|
* |
|
* @param s the mpeg context |
|
*/ |
|
void (*decode_mb)(struct MpegEncContext *s); |
|
|
|
/** |
|
* Initialize the hwaccel private data. |
|
* |
|
* This will be called from ff_get_format(), after hwaccel and |
|
* hwaccel_context are set and the hwaccel private data in AVCodecInternal |
|
* is allocated. |
|
*/ |
|
int (*init)(AVCodecContext *avctx); |
|
|
|
/** |
|
* Uninitialize the hwaccel private data. |
|
* |
|
* This will be called from get_format() or avcodec_close(), after hwaccel |
|
* and hwaccel_context are already uninitialized. |
|
*/ |
|
int (*uninit)(AVCodecContext *avctx); |
|
|
|
/** |
|
* Size of the private data to allocate in |
|
* AVCodecInternal.hwaccel_priv_data. |
|
*/ |
|
int priv_data_size; |
|
|
|
/** |
|
* Internal hwaccel capabilities. |
|
*/ |
|
int caps_internal; |
|
} AVHWAccel; |
|
|
|
/** |
|
* HWAccel is experimental and is thus avoided in favor of non experimental |
|
* codecs |
|
*/ |
|
#define AV_HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200 |
|
|
|
/** |
|
* Hardware acceleration should be used for decoding even if the codec level |
|
* used is unknown or higher than the maximum supported level reported by the |
|
* hardware driver. |
|
* |
|
* It's generally a good idea to pass this flag unless you have a specific |
|
* reason not to, as hardware tends to under-report supported levels. |
|
*/ |
|
#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0) |
|
|
|
/** |
|
* Hardware acceleration can output YUV pixel formats with a different chroma |
|
* sampling than 4:2:0 and/or other than 8 bits per component. |
|
*/ |
|
#define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1) |
|
|
|
/** |
|
* Hardware acceleration should still be attempted for decoding when the |
|
* codec profile does not match the reported capabilities of the hardware. |
|
* |
|
* For example, this can be used to try to decode baseline profile H.264 |
|
* streams in hardware - it will often succeed, because many streams marked |
|
* as baseline profile actually conform to constrained baseline profile. |
|
* |
|
* @warning If the stream is actually not supported then the behaviour is |
|
* undefined, and may include returning entirely incorrect output |
|
* while indicating success. |
|
*/ |
|
#define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2) |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#if FF_API_AVPICTURE |
|
/** |
|
* @defgroup lavc_picture AVPicture |
|
* |
|
* Functions for working with AVPicture |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Picture data structure. |
|
* |
|
* Up to four components can be stored into it, the last component is |
|
* alpha. |
|
* @deprecated use AVFrame or imgutils functions instead |
|
*/ |
|
typedef struct AVPicture { |
|
attribute_deprecated |
|
uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes |
|
attribute_deprecated |
|
int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line |
|
} AVPicture; |
|
|
|
/** |
|
* @} |
|
*/ |
|
#endif |
|
|
|
enum AVSubtitleType { |
|
SUBTITLE_NONE, |
|
|
|
SUBTITLE_BITMAP, ///< A bitmap, pict will be set |
|
|
|
/** |
|
* Plain text, the text field must be set by the decoder and is |
|
* authoritative. ass and pict fields may contain approximations. |
|
*/ |
|
SUBTITLE_TEXT, |
|
|
|
/** |
|
* Formatted text, the ass field must be set by the decoder and is |
|
* authoritative. pict and text fields may contain approximations. |
|
*/ |
|
SUBTITLE_ASS, |
|
}; |
|
|
|
#define AV_SUBTITLE_FLAG_FORCED 0x00000001 |
|
|
|
typedef struct AVSubtitleRect { |
|
int x; ///< top left corner of pict, undefined when pict is not set |
|
int y; ///< top left corner of pict, undefined when pict is not set |
|
int w; ///< width of pict, undefined when pict is not set |
|
int h; ///< height of pict, undefined when pict is not set |
|
int nb_colors; ///< number of colors in pict, undefined when pict is not set |
|
|
|
#if FF_API_AVPICTURE |
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
AVPicture pict; |
|
#endif |
|
/** |
|
* data+linesize for the bitmap of this subtitle. |
|
* Can be set for text/ass as well once they are rendered. |
|
*/ |
|
uint8_t *data[4]; |
|
int linesize[4]; |
|
|
|
enum AVSubtitleType type; |
|
|
|
char *text; ///< 0 terminated plain UTF-8 text |
|
|
|
/** |
|
* 0 terminated ASS/SSA compatible event line. |
|
* The presentation of this is unaffected by the other values in this |
|
* struct. |
|
*/ |
|
char *ass; |
|
|
|
int flags; |
|
} AVSubtitleRect; |
|
|
|
typedef struct AVSubtitle { |
|
uint16_t format; /* 0 = graphics */ |
|
uint32_t start_display_time; /* relative to packet pts, in ms */ |
|
uint32_t end_display_time; /* relative to packet pts, in ms */ |
|
unsigned num_rects; |
|
AVSubtitleRect **rects; |
|
int64_t pts; ///< Same as packet pts, in AV_TIME_BASE |
|
} AVSubtitle; |
|
|
|
/** |
|
* This struct describes the properties of an encoded stream. |
|
* |
|
* sizeof(AVCodecParameters) is not a part of the public ABI, this struct must |
|
* be allocated with avcodec_parameters_alloc() and freed with |
|
* avcodec_parameters_free(). |
|
*/ |
|
typedef struct AVCodecParameters { |
|
/** |
|
* General type of the encoded data. |
|
*/ |
|
enum AVMediaType codec_type; |
|
/** |
|
* Specific type of the encoded data (the codec used). |
|
*/ |
|
enum AVCodecID codec_id; |
|
/** |
|
* Additional information about the codec (corresponds to the AVI FOURCC). |
|
*/ |
|
uint32_t codec_tag; |
|
|
|
/** |
|
* Extra binary data needed for initializing the decoder, codec-dependent. |
|
* |
|
* Must be allocated with av_malloc() and will be freed by |
|
* avcodec_parameters_free(). The allocated size of extradata must be at |
|
* least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding |
|
* bytes zeroed. |
|
*/ |
|
uint8_t *extradata; |
|
/** |
|
* Size of the extradata content in bytes. |
|
*/ |
|
int extradata_size; |
|
|
|
/** |
|
* - video: the pixel format, the value corresponds to enum AVPixelFormat. |
|
* - audio: the sample format, the value corresponds to enum AVSampleFormat. |
|
*/ |
|
int format; |
|
|
|
/** |
|
* The average bitrate of the encoded data (in bits per second). |
|
*/ |
|
int64_t bit_rate; |
|
|
|
/** |
|
* The number of bits per sample in the codedwords. |
|
* |
|
* This is basically the bitrate per sample. It is mandatory for a bunch of |
|
* formats to actually decode them. It's the number of bits for one sample in |
|
* the actual coded bitstream. |
|
* |
|
* This could be for example 4 for ADPCM |
|
* For PCM formats this matches bits_per_raw_sample |
|
* Can be 0 |
|
*/ |
|
int bits_per_coded_sample; |
|
|
|
/** |
|
* This is the number of valid bits in each output sample. If the |
|
* sample format has more bits, the least significant bits are additional |
|
* padding bits, which are always 0. Use right shifts to reduce the sample |
|
* to its actual size. For example, audio formats with 24 bit samples will |
|
* have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32. |
|
* To get the original sample use "(int32_t)sample >> 8"." |
|
* |
|
* For ADPCM this might be 12 or 16 or similar |
|
* Can be 0 |
|
*/ |
|
int bits_per_raw_sample; |
|
|
|
/** |
|
* Codec-specific bitstream restrictions that the stream conforms to. |
|
*/ |
|
int profile; |
|
int level; |
|
|
|
/** |
|
* Video only. The dimensions of the video frame in pixels. |
|
*/ |
|
int width; |
|
int height; |
|
|
|
/** |
|
* Video only. The aspect ratio (width / height) which a single pixel |
|
* should have when displayed. |
|
* |
|
* When the aspect ratio is unknown / undefined, the numerator should be |
|
* set to 0 (the denominator may have any value). |
|
*/ |
|
AVRational sample_aspect_ratio; |
|
|
|
/** |
|
* Video only. The order of the fields in interlaced video. |
|
*/ |
|
enum AVFieldOrder field_order; |
|
|
|
/** |
|
* Video only. Additional colorspace characteristics. |
|
*/ |
|
enum AVColorRange color_range; |
|
enum AVColorPrimaries color_primaries; |
|
enum AVColorTransferCharacteristic color_trc; |
|
enum AVColorSpace color_space; |
|
enum AVChromaLocation chroma_location; |
|
|
|
/** |
|
* Video only. Number of delayed frames. |
|
*/ |
|
int video_delay; |
|
|
|
/** |
|
* Audio only. The channel layout bitmask. May be 0 if the channel layout is |
|
* unknown or unspecified, otherwise the number of bits set must be equal to |
|
* the channels field. |
|
*/ |
|
uint64_t channel_layout; |
|
/** |
|
* Audio only. The number of audio channels. |
|
*/ |
|
int channels; |
|
/** |
|
* Audio only. The number of audio samples per second. |
|
*/ |
|
int sample_rate; |
|
/** |
|
* Audio only. The number of bytes per coded audio frame, required by some |
|
* formats. |
|
* |
|
* Corresponds to nBlockAlign in WAVEFORMATEX. |
|
*/ |
|
int block_align; |
|
/** |
|
* Audio only. Audio frame size, if known. Required by some formats to be static. |
|
*/ |
|
int frame_size; |
|
|
|
/** |
|
* Audio only. The amount of padding (in samples) inserted by the encoder at |
|
* the beginning of the audio. I.e. this number of leading decoded samples |
|
* must be discarded by the caller to get the original audio without leading |
|
* padding. |
|
*/ |
|
int initial_padding; |
|
/** |
|
* Audio only. The amount of padding (in samples) appended by the encoder to |
|
* the end of the audio. I.e. this number of decoded samples must be |
|
* discarded by the caller from the end of the stream to get the original |
|
* audio without any trailing padding. |
|
*/ |
|
int trailing_padding; |
|
/** |
|
* Audio only. Number of samples to skip after a discontinuity. |
|
*/ |
|
int seek_preroll; |
|
} AVCodecParameters; |
|
|
|
/** |
|
* If c is NULL, returns the first registered codec, |
|
* if c is non-NULL, returns the next registered codec after c, |
|
* or NULL if c is the last one. |
|
*/ |
|
AVCodec *av_codec_next(const AVCodec *c); |
|
|
|
/** |
|
* Return the LIBAVCODEC_VERSION_INT constant. |
|
*/ |
|
unsigned avcodec_version(void); |
|
|
|
/** |
|
* Return the libavcodec build-time configuration. |
|
*/ |
|
const char *avcodec_configuration(void); |
|
|
|
/** |
|
* Return the libavcodec license. |
|
*/ |
|
const char *avcodec_license(void); |
|
|
|
/** |
|
* Register the codec codec and initialize libavcodec. |
|
* |
|
* @warning either this function or avcodec_register_all() must be called |
|
* before any other libavcodec functions. |
|
* |
|
* @see avcodec_register_all() |
|
*/ |
|
void avcodec_register(AVCodec *codec); |
|
|
|
/** |
|
* Register all the codecs, parsers and bitstream filters which were enabled at |
|
* configuration time. If you do not call this function you can select exactly |
|
* which formats you want to support, by using the individual registration |
|
* functions. |
|
* |
|
* @see avcodec_register |
|
* @see av_register_codec_parser |
|
* @see av_register_bitstream_filter |
|
*/ |
|
void avcodec_register_all(void); |
|
|
|
/** |
|
* Allocate an AVCodecContext and set its fields to default values. The |
|
* resulting struct should be freed with avcodec_free_context(). |
|
* |
|
* @param codec if non-NULL, allocate private data and initialize defaults |
|
* for the given codec. It is illegal to then call avcodec_open2() |
|
* with a different codec. |
|
* If NULL, then the codec-specific defaults won't be initialized, |
|
* which may result in suboptimal default settings (this is |
|
* important mainly for encoders, e.g. libx264). |
|
* |
|
* @return An AVCodecContext filled with default values or NULL on failure. |
|
*/ |
|
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); |
|
|
|
/** |
|
* Free the codec context and everything associated with it and write NULL to |
|
* the provided pointer. |
|
*/ |
|
void avcodec_free_context(AVCodecContext **avctx); |
|
|
|
#if FF_API_GET_CONTEXT_DEFAULTS |
|
/** |
|
* @deprecated This function should not be used, as closing and opening a codec |
|
* context multiple time is not supported. A new codec context should be |
|
* allocated for each new use. |
|
*/ |
|
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); |
|
#endif |
|
|
|
/** |
|
* Get the AVClass for AVCodecContext. It can be used in combination with |
|
* AV_OPT_SEARCH_FAKE_OBJ for examining options. |
|
* |
|
* @see av_opt_find(). |
|
*/ |
|
const AVClass *avcodec_get_class(void); |
|
|
|
#if FF_API_COPY_CONTEXT |
|
/** |
|
* Get the AVClass for AVFrame. It can be used in combination with |
|
* AV_OPT_SEARCH_FAKE_OBJ for examining options. |
|
* |
|
* @see av_opt_find(). |
|
*/ |
|
const AVClass *avcodec_get_frame_class(void); |
|
|
|
/** |
|
* Get the AVClass for AVSubtitleRect. It can be used in combination with |
|
* AV_OPT_SEARCH_FAKE_OBJ for examining options. |
|
* |
|
* @see av_opt_find(). |
|
*/ |
|
const AVClass *avcodec_get_subtitle_rect_class(void); |
|
|
|
/** |
|
* Copy the settings of the source AVCodecContext into the destination |
|
* AVCodecContext. The resulting destination codec context will be |
|
* unopened, i.e. you are required to call avcodec_open2() before you |
|
* can use this AVCodecContext to decode/encode video/audio data. |
|
* |
|
* @param dest target codec context, should be initialized with |
|
* avcodec_alloc_context3(NULL), but otherwise uninitialized |
|
* @param src source codec context |
|
* @return AVERROR() on error (e.g. memory allocation error), 0 on success |
|
* |
|
* @deprecated The semantics of this function are ill-defined and it should not |
|
* be used. If you need to transfer the stream parameters from one codec context |
|
* to another, use an intermediate AVCodecParameters instance and the |
|
* avcodec_parameters_from_context() / avcodec_parameters_to_context() |
|
* functions. |
|
*/ |
|
attribute_deprecated |
|
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); |
|
#endif |
|
|
|
/** |
|
* Allocate a new AVCodecParameters and set its fields to default values |
|
* (unknown/invalid/0). The returned struct must be freed with |
|
* avcodec_parameters_free(). |
|
*/ |
|
AVCodecParameters *avcodec_parameters_alloc(void); |
|
|
|
/** |
|
* Free an AVCodecParameters instance and everything associated with it and |
|
* write NULL to the supplied pointer. |
|
*/ |
|
void avcodec_parameters_free(AVCodecParameters **par); |
|
|
|
/** |
|
* Copy the contents of src to dst. Any allocated fields in dst are freed and |
|
* replaced with newly allocated duplicates of the corresponding fields in src. |
|
* |
|
* @return >= 0 on success, a negative AVERROR code on failure. |
|
*/ |
|
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src); |
|
|
|
/** |
|
* Fill the parameters struct based on the values from the supplied codec |
|
* context. Any allocated fields in par are freed and replaced with duplicates |
|
* of the corresponding fields in codec. |
|
* |
|
* @return >= 0 on success, a negative AVERROR code on failure |
|
*/ |
|
int avcodec_parameters_from_context(AVCodecParameters *par, |
|
const AVCodecContext *codec); |
|
|
|
/** |
|
* Fill the codec context based on the values from the supplied codec |
|
* parameters. Any allocated fields in codec that have a corresponding field in |
|
* par are freed and replaced with duplicates of the corresponding field in par. |
|
* Fields in codec that do not have a counterpart in par are not touched. |
|
* |
|
* @return >= 0 on success, a negative AVERROR code on failure. |
|
*/ |
|
int avcodec_parameters_to_context(AVCodecContext *codec, |
|
const AVCodecParameters *par); |
|
|
|
/** |
|
* Initialize the AVCodecContext to use the given AVCodec. Prior to using this |
|
* function the context has to be allocated with avcodec_alloc_context3(). |
|
* |
|
* The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), |
|
* avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for |
|
* retrieving a codec. |
|
* |
|
* @warning This function is not thread safe! |
|
* |
|
* @note Always call this function before using decoding routines (such as |
|
* @ref avcodec_receive_frame()). |
|
* |
|
* @code |
|
* avcodec_register_all(); |
|
* av_dict_set(&opts, "b", "2.5M", 0); |
|
* codec = avcodec_find_decoder(AV_CODEC_ID_H264); |
|
* if (!codec) |
|
* exit(1); |
|
* |
|
* context = avcodec_alloc_context3(codec); |
|
* |
|
* if (avcodec_open2(context, codec, opts) < 0) |
|
* exit(1); |
|
* @endcode |
|
* |
|
* @param avctx The context to initialize. |
|
* @param codec The codec to open this context for. If a non-NULL codec has been |
|
* previously passed to avcodec_alloc_context3() or |
|
* for this context, then this parameter MUST be either NULL or |
|
* equal to the previously passed codec. |
|
* @param options A dictionary filled with AVCodecContext and codec-private options. |
|
* On return this object will be filled with options that were not found. |
|
* |
|
* @return zero on success, a negative value on error |
|
* @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), |
|
* av_dict_set(), av_opt_find(). |
|
*/ |
|
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); |
|
|
|
/** |
|
* Close a given AVCodecContext and free all the data associated with it |
|
* (but not the AVCodecContext itself). |
|
* |
|
* Calling this function on an AVCodecContext that hasn't been opened will free |
|
* the codec-specific data allocated in avcodec_alloc_context3() with a non-NULL |
|
* codec. Subsequent calls will do nothing. |
|
* |
|
* @note Do not use this function. Use avcodec_free_context() to destroy a |
|
* codec context (either open or closed). Opening and closing a codec context |
|
* multiple times is not supported anymore -- use multiple codec contexts |
|
* instead. |
|
*/ |
|
int avcodec_close(AVCodecContext *avctx); |
|
|
|
/** |
|
* Free all allocated data in the given subtitle struct. |
|
* |
|
* @param sub AVSubtitle to free. |
|
*/ |
|
void avsubtitle_free(AVSubtitle *sub); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @addtogroup lavc_packet |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Allocate an AVPacket and set its fields to default values. The resulting |
|
* struct must be freed using av_packet_free(). |
|
* |
|
* @return An AVPacket filled with default values or NULL on failure. |
|
* |
|
* @note this only allocates the AVPacket itself, not the data buffers. Those |
|
* must be allocated through other means such as av_new_packet. |
|
* |
|
* @see av_new_packet |
|
*/ |
|
AVPacket *av_packet_alloc(void); |
|
|
|
/** |
|
* Create a new packet that references the same data as src. |
|
* |
|
* This is a shortcut for av_packet_alloc()+av_packet_ref(). |
|
* |
|
* @return newly created AVPacket on success, NULL on error. |
|
* |
|
* @see av_packet_alloc |
|
* @see av_packet_ref |
|
*/ |
|
AVPacket *av_packet_clone(const AVPacket *src); |
|
|
|
/** |
|
* Free the packet, if the packet is reference counted, it will be |
|
* unreferenced first. |
|
* |
|
* @param pkt packet to be freed. The pointer will be set to NULL. |
|
* @note passing NULL is a no-op. |
|
*/ |
|
void av_packet_free(AVPacket **pkt); |
|
|
|
/** |
|
* Initialize optional fields of a packet with default values. |
|
* |
|
* Note, this does not touch the data and size members, which have to be |
|
* initialized separately. |
|
* |
|
* @param pkt packet |
|
*/ |
|
void av_init_packet(AVPacket *pkt); |
|
|
|
/** |
|
* Allocate the payload of a packet and initialize its fields with |
|
* default values. |
|
* |
|
* @param pkt packet |
|
* @param size wanted payload size |
|
* @return 0 if OK, AVERROR_xxx otherwise |
|
*/ |
|
int av_new_packet(AVPacket *pkt, int size); |
|
|
|
/** |
|
* Reduce packet size, correctly zeroing padding |
|
* |
|
* @param pkt packet |
|
* @param size new size |
|
*/ |
|
void av_shrink_packet(AVPacket *pkt, int size); |
|
|
|
/** |
|
* Increase packet size, correctly zeroing padding |
|
* |
|
* @param pkt packet |
|
* @param grow_by number of bytes by which to increase the size of the packet |
|
*/ |
|
int av_grow_packet(AVPacket *pkt, int grow_by); |
|
|
|
/** |
|
* Initialize a reference-counted packet from av_malloc()ed data. |
|
* |
|
* @param pkt packet to be initialized. This function will set the data, size, |
|
* buf and destruct fields, all others are left untouched. |
|
* @param data Data allocated by av_malloc() to be used as packet data. If this |
|
* function returns successfully, the data is owned by the underlying AVBuffer. |
|
* The caller may not access the data through other means. |
|
* @param size size of data in bytes, without the padding. I.e. the full buffer |
|
* size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE. |
|
* |
|
* @return 0 on success, a negative AVERROR on error |
|
*/ |
|
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size); |
|
|
|
#if FF_API_AVPACKET_OLD_API |
|
/** |
|
* @warning This is a hack - the packet memory allocation stuff is broken. The |
|
* packet is allocated if it was not really allocated. |
|
* |
|
* @deprecated Use av_packet_ref |
|
*/ |
|
attribute_deprecated |
|
int av_dup_packet(AVPacket *pkt); |
|
/** |
|
* Copy packet, including contents |
|
* |
|
* @return 0 on success, negative AVERROR on fail |
|
*/ |
|
int av_copy_packet(AVPacket *dst, const AVPacket *src); |
|
|
|
/** |
|
* Copy packet side data |
|
* |
|
* @return 0 on success, negative AVERROR on fail |
|
*/ |
|
int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src); |
|
|
|
/** |
|
* Free a packet. |
|
* |
|
* @deprecated Use av_packet_unref |
|
* |
|
* @param pkt packet to free |
|
*/ |
|
attribute_deprecated |
|
void av_free_packet(AVPacket *pkt); |
|
#endif |
|
/** |
|
* Allocate new information of a packet. |
|
* |
|
* @param pkt packet |
|
* @param type side information type |
|
* @param size side information size |
|
* @return pointer to fresh allocated data or NULL otherwise |
|
*/ |
|
uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
|
int size); |
|
|
|
/** |
|
* Wrap an existing array as a packet side data. |
|
* |
|
* @param pkt packet |
|
* @param type side information type |
|
* @param data the side data array. It must be allocated with the av_malloc() |
|
* family of functions. The ownership of the data is transferred to |
|
* pkt. |
|
* @param size side information size |
|
* @return a non-negative number on success, a negative AVERROR code on |
|
* failure. On failure, the packet is unchanged and the data remains |
|
* owned by the caller. |
|
*/ |
|
int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
|
uint8_t *data, size_t size); |
|
|
|
/** |
|
* Shrink the already allocated side data buffer |
|
* |
|
* @param pkt packet |
|
* @param type side information type |
|
* @param size new side information size |
|
* @return 0 on success, < 0 on failure |
|
*/ |
|
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
|
int size); |
|
|
|
/** |
|
* Get side information from packet. |
|
* |
|
* @param pkt packet |
|
* @param type desired side information type |
|
* @param size pointer for side information size to store (optional) |
|
* @return pointer to data if present or NULL otherwise |
|
*/ |
|
uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, |
|
int *size); |
|
|
|
#if FF_API_MERGE_SD_API |
|
attribute_deprecated |
|
int av_packet_merge_side_data(AVPacket *pkt); |
|
|
|
attribute_deprecated |
|
int av_packet_split_side_data(AVPacket *pkt); |
|
#endif |
|
|
|
const char *av_packet_side_data_name(enum AVPacketSideDataType type); |
|
|
|
/** |
|
* Pack a dictionary for use in side_data. |
|
* |
|
* @param dict The dictionary to pack. |
|
* @param size pointer to store the size of the returned data |
|
* @return pointer to data if successful, NULL otherwise |
|
*/ |
|
uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size); |
|
/** |
|
* Unpack a dictionary from side_data. |
|
* |
|
* @param data data from side_data |
|
* @param size size of the data |
|
* @param dict the metadata storage dictionary |
|
* @return 0 on success, < 0 on failure |
|
*/ |
|
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict); |
|
|
|
|
|
/** |
|
* Convenience function to free all the side data stored. |
|
* All the other fields stay untouched. |
|
* |
|
* @param pkt packet |
|
*/ |
|
void av_packet_free_side_data(AVPacket *pkt); |
|
|
|
/** |
|
* Setup a new reference to the data described by a given packet |
|
* |
|
* If src is reference-counted, setup dst as a new reference to the |
|
* buffer in src. Otherwise allocate a new buffer in dst and copy the |
|
* data from src into it. |
|
* |
|
* All the other fields are copied from src. |
|
* |
|
* @see av_packet_unref |
|
* |
|
* @param dst Destination packet |
|
* @param src Source packet |
|
* |
|
* @return 0 on success, a negative AVERROR on error. |
|
*/ |
|
int av_packet_ref(AVPacket *dst, const AVPacket *src); |
|
|
|
/** |
|
* Wipe the packet. |
|
* |
|
* Unreference the buffer referenced by the packet and reset the |
|
* remaining packet fields to their default values. |
|
* |
|
* @param pkt The packet to be unreferenced. |
|
*/ |
|
void av_packet_unref(AVPacket *pkt); |
|
|
|
/** |
|
* Move every field in src to dst and reset src. |
|
* |
|
* @see av_packet_unref |
|
* |
|
* @param src Source packet, will be reset |
|
* @param dst Destination packet |
|
*/ |
|
void av_packet_move_ref(AVPacket *dst, AVPacket *src); |
|
|
|
/** |
|
* Copy only "properties" fields from src to dst. |
|
* |
|
* Properties for the purpose of this function are all the fields |
|
* beside those related to the packet data (buf, data, size) |
|
* |
|
* @param dst Destination packet |
|
* @param src Source packet |
|
* |
|
* @return 0 on success AVERROR on failure. |
|
*/ |
|
int av_packet_copy_props(AVPacket *dst, const AVPacket *src); |
|
|
|
/** |
|
* Convert valid timing fields (timestamps / durations) in a packet from one |
|
* timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be |
|
* ignored. |
|
* |
|
* @param pkt packet on which the conversion will be performed |
|
* @param tb_src source timebase, in which the timing fields in pkt are |
|
* expressed |
|
* @param tb_dst destination timebase, to which the timing fields will be |
|
* converted |
|
*/ |
|
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @addtogroup lavc_decoding |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Find a registered decoder with a matching codec ID. |
|
* |
|
* @param id AVCodecID of the requested decoder |
|
* @return A decoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_decoder(enum AVCodecID id); |
|
|
|
/** |
|
* Find a registered decoder with the specified name. |
|
* |
|
* @param name name of the requested decoder |
|
* @return A decoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_decoder_by_name(const char *name); |
|
|
|
/** |
|
* The default callback for AVCodecContext.get_buffer2(). It is made public so |
|
* it can be called by custom get_buffer2() implementations for decoders without |
|
* AV_CODEC_CAP_DR1 set. |
|
*/ |
|
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags); |
|
|
|
#if FF_API_EMU_EDGE |
|
/** |
|
* Return the amount of padding in pixels which the get_buffer callback must |
|
* provide around the edge of the image for codecs which do not have the |
|
* CODEC_FLAG_EMU_EDGE flag. |
|
* |
|
* @return Required padding in pixels. |
|
* |
|
* @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer |
|
* needed |
|
*/ |
|
attribute_deprecated |
|
unsigned avcodec_get_edge_width(void); |
|
#endif |
|
|
|
/** |
|
* Modify width and height values so that they will result in a memory |
|
* buffer that is acceptable for the codec if you do not use any horizontal |
|
* padding. |
|
* |
|
* May only be used if a codec with AV_CODEC_CAP_DR1 has been opened. |
|
*/ |
|
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); |
|
|
|
/** |
|
* Modify width and height values so that they will result in a memory |
|
* buffer that is acceptable for the codec if you also ensure that all |
|
* line sizes are a multiple of the respective linesize_align[i]. |
|
* |
|
* May only be used if a codec with AV_CODEC_CAP_DR1 has been opened. |
|
*/ |
|
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, |
|
int linesize_align[AV_NUM_DATA_POINTERS]); |
|
|
|
/** |
|
* Converts AVChromaLocation to swscale x/y chroma position. |
|
* |
|
* The positions represent the chroma (0,0) position in a coordinates system |
|
* with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
|
* |
|
* @param xpos horizontal chroma sample position |
|
* @param ypos vertical chroma sample position |
|
*/ |
|
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos); |
|
|
|
/** |
|
* Converts swscale x/y chroma position to AVChromaLocation. |
|
* |
|
* The positions represent the chroma (0,0) position in a coordinates system |
|
* with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
|
* |
|
* @param xpos horizontal chroma sample position |
|
* @param ypos vertical chroma sample position |
|
*/ |
|
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos); |
|
|
|
/** |
|
* Decode the audio frame of size avpkt->size from avpkt->data into frame. |
|
* |
|
* Some decoders may support multiple frames in a single AVPacket. Such |
|
* decoders would then just decode the first frame and the return value would be |
|
* less than the packet size. In this case, avcodec_decode_audio4 has to be |
|
* called again with an AVPacket containing the remaining data in order to |
|
* decode the second frame, etc... Even if no frames are returned, the packet |
|
* needs to be fed to the decoder with remaining data until it is completely |
|
* consumed or an error occurs. |
|
* |
|
* Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input |
|
* and output. This means that for some packets they will not immediately |
|
* produce decoded output and need to be flushed at the end of decoding to get |
|
* all the decoded data. Flushing is done by calling this function with packets |
|
* with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
|
* returning samples. It is safe to flush even those decoders that are not |
|
* marked with AV_CODEC_CAP_DELAY, then no samples will be returned. |
|
* |
|
* @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE |
|
* larger than the actual read bytes because some optimized bitstream |
|
* readers read 32 or 64 bits at once and could read over the end. |
|
* |
|
* @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
|
* before packets may be fed to the decoder. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] frame The AVFrame in which to store decoded audio samples. |
|
* The decoder will allocate a buffer for the decoded frame by |
|
* calling the AVCodecContext.get_buffer2() callback. |
|
* When AVCodecContext.refcounted_frames is set to 1, the frame is |
|
* reference counted and the returned reference belongs to the |
|
* caller. The caller must release the frame using av_frame_unref() |
|
* when the frame is no longer needed. The caller may safely write |
|
* to the frame if av_frame_is_writable() returns 1. |
|
* When AVCodecContext.refcounted_frames is set to 0, the returned |
|
* reference belongs to the decoder and is valid only until the |
|
* next call to this function or until closing or flushing the |
|
* decoder. The caller may not write to it. |
|
* @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is |
|
* non-zero. Note that this field being set to zero |
|
* does not mean that an error has occurred. For |
|
* decoders with AV_CODEC_CAP_DELAY set, no given decode |
|
* call is guaranteed to produce a frame. |
|
* @param[in] avpkt The input AVPacket containing the input buffer. |
|
* At least avpkt->data and avpkt->size should be set. Some |
|
* decoders might also require additional fields to be set. |
|
* @return A negative error code is returned if an error occurred during |
|
* decoding, otherwise the number of bytes consumed from the input |
|
* AVPacket is returned. |
|
* |
|
* @deprecated Use avcodec_send_packet() and avcodec_receive_frame(). |
|
*/ |
|
attribute_deprecated |
|
int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, |
|
int *got_frame_ptr, const AVPacket *avpkt); |
|
|
|
/** |
|
* Decode the video frame of size avpkt->size from avpkt->data into picture. |
|
* Some decoders may support multiple frames in a single AVPacket, such |
|
* decoders would then just decode the first frame. |
|
* |
|
* @warning The input buffer must be AV_INPUT_BUFFER_PADDING_SIZE larger than |
|
* the actual read bytes because some optimized bitstream readers read 32 or 64 |
|
* bits at once and could read over the end. |
|
* |
|
* @warning The end of the input buffer buf should be set to 0 to ensure that |
|
* no overreading happens for damaged MPEG streams. |
|
* |
|
* @note Codecs which have the AV_CODEC_CAP_DELAY capability set have a delay |
|
* between input and output, these need to be fed with avpkt->data=NULL, |
|
* avpkt->size=0 at the end to return the remaining frames. |
|
* |
|
* @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
|
* before packets may be fed to the decoder. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] picture The AVFrame in which the decoded video frame will be stored. |
|
* Use av_frame_alloc() to get an AVFrame. The codec will |
|
* allocate memory for the actual bitmap by calling the |
|
* AVCodecContext.get_buffer2() callback. |
|
* When AVCodecContext.refcounted_frames is set to 1, the frame is |
|
* reference counted and the returned reference belongs to the |
|
* caller. The caller must release the frame using av_frame_unref() |
|
* when the frame is no longer needed. The caller may safely write |
|
* to the frame if av_frame_is_writable() returns 1. |
|
* When AVCodecContext.refcounted_frames is set to 0, the returned |
|
* reference belongs to the decoder and is valid only until the |
|
* next call to this function or until closing or flushing the |
|
* decoder. The caller may not write to it. |
|
* |
|
* @param[in] avpkt The input AVPacket containing the input buffer. |
|
* You can create such packet with av_init_packet() and by then setting |
|
* data and size, some decoders might in addition need other fields like |
|
* flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least |
|
* fields possible. |
|
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. |
|
* @return On error a negative value is returned, otherwise the number of bytes |
|
* used or zero if no frame could be decompressed. |
|
* |
|
* @deprecated Use avcodec_send_packet() and avcodec_receive_frame(). |
|
*/ |
|
attribute_deprecated |
|
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, |
|
int *got_picture_ptr, |
|
const AVPacket *avpkt); |
|
|
|
/** |
|
* Decode a subtitle message. |
|
* Return a negative value on error, otherwise return the number of bytes used. |
|
* If no subtitle could be decompressed, got_sub_ptr is zero. |
|
* Otherwise, the subtitle is stored in *sub. |
|
* Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for |
|
* simplicity, because the performance difference is expect to be negligible |
|
* and reusing a get_buffer written for video codecs would probably perform badly |
|
* due to a potentially very different allocation pattern. |
|
* |
|
* Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input |
|
* and output. This means that for some packets they will not immediately |
|
* produce decoded output and need to be flushed at the end of decoding to get |
|
* all the decoded data. Flushing is done by calling this function with packets |
|
* with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
|
* returning subtitles. It is safe to flush even those decoders that are not |
|
* marked with AV_CODEC_CAP_DELAY, then no subtitles will be returned. |
|
* |
|
* @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
|
* before packets may be fed to the decoder. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored, |
|
* must be freed with avsubtitle_free if *got_sub_ptr is set. |
|
* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero. |
|
* @param[in] avpkt The input AVPacket containing the input buffer. |
|
*/ |
|
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, |
|
int *got_sub_ptr, |
|
AVPacket *avpkt); |
|
|
|
/** |
|
* Supply raw packet data as input to a decoder. |
|
* |
|
* Internally, this call will copy relevant AVCodecContext fields, which can |
|
* influence decoding per-packet, and apply them when the packet is actually |
|
* decoded. (For example AVCodecContext.skip_frame, which might direct the |
|
* decoder to drop the frame contained by the packet sent with this function.) |
|
* |
|
* @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE |
|
* larger than the actual read bytes because some optimized bitstream |
|
* readers read 32 or 64 bits at once and could read over the end. |
|
* |
|
* @warning Do not mix this API with the legacy API (like avcodec_decode_video2()) |
|
* on the same AVCodecContext. It will return unexpected results now |
|
* or in future libavcodec versions. |
|
* |
|
* @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
|
* before packets may be fed to the decoder. |
|
* |
|
* @param avctx codec context |
|
* @param[in] avpkt The input AVPacket. Usually, this will be a single video |
|
* frame, or several complete audio frames. |
|
* Ownership of the packet remains with the caller, and the |
|
* decoder will not write to the packet. The decoder may create |
|
* a reference to the packet data (or copy it if the packet is |
|
* not reference-counted). |
|
* Unlike with older APIs, the packet is always fully consumed, |
|
* and if it contains multiple frames (e.g. some audio codecs), |
|
* will require you to call avcodec_receive_frame() multiple |
|
* times afterwards before you can send a new packet. |
|
* It can be NULL (or an AVPacket with data set to NULL and |
|
* size set to 0); in this case, it is considered a flush |
|
* packet, which signals the end of the stream. Sending the |
|
* first flush packet will return success. Subsequent ones are |
|
* unnecessary and will return AVERROR_EOF. If the decoder |
|
* still has frames buffered, it will return them after sending |
|
* a flush packet. |
|
* |
|
* @return 0 on success, otherwise negative error code: |
|
* AVERROR(EAGAIN): input is not accepted in the current state - user |
|
* must read output with avcodec_receive_frame() (once |
|
* all output is read, the packet should be resent, and |
|
* the call will not fail with EAGAIN). |
|
* AVERROR_EOF: the decoder has been flushed, and no new packets can |
|
* be sent to it (also returned if more than 1 flush |
|
* packet is sent) |
|
* AVERROR(EINVAL): codec not opened, it is an encoder, or requires flush |
|
* AVERROR(ENOMEM): failed to add packet to internal queue, or similar |
|
* other errors: legitimate decoding errors |
|
*/ |
|
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt); |
|
|
|
/** |
|
* Return decoded output data from a decoder. |
|
* |
|
* @param avctx codec context |
|
* @param frame This will be set to a reference-counted video or audio |
|
* frame (depending on the decoder type) allocated by the |
|
* decoder. Note that the function will always call |
|
* av_frame_unref(frame) before doing anything else. |
|
* |
|
* @return |
|
* 0: success, a frame was returned |
|
* AVERROR(EAGAIN): output is not available in this state - user must try |
|
* to send new input |
|
* AVERROR_EOF: the decoder has been fully flushed, and there will be |
|
* no more output frames |
|
* AVERROR(EINVAL): codec not opened, or it is an encoder |
|
* other negative values: legitimate decoding errors |
|
*/ |
|
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame); |
|
|
|
/** |
|
* Supply a raw video or audio frame to the encoder. Use avcodec_receive_packet() |
|
* to retrieve buffered output packets. |
|
* |
|
* @param avctx codec context |
|
* @param[in] frame AVFrame containing the raw audio or video frame to be encoded. |
|
* Ownership of the frame remains with the caller, and the |
|
* encoder will not write to the frame. The encoder may create |
|
* a reference to the frame data (or copy it if the frame is |
|
* not reference-counted). |
|
* It can be NULL, in which case it is considered a flush |
|
* packet. This signals the end of the stream. If the encoder |
|
* still has packets buffered, it will return them after this |
|
* call. Once flushing mode has been entered, additional flush |
|
* packets are ignored, and sending frames will return |
|
* AVERROR_EOF. |
|
* |
|
* For audio: |
|
* If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame |
|
* can have any number of samples. |
|
* If it is not set, frame->nb_samples must be equal to |
|
* avctx->frame_size for all frames except the last. |
|
* The final frame may be smaller than avctx->frame_size. |
|
* @return 0 on success, otherwise negative error code: |
|
* AVERROR(EAGAIN): input is not accepted in the current state - user |
|
* must read output with avcodec_receive_packet() (once |
|
* all output is read, the packet should be resent, and |
|
* the call will not fail with EAGAIN). |
|
* AVERROR_EOF: the encoder has been flushed, and no new frames can |
|
* be sent to it |
|
* AVERROR(EINVAL): codec not opened, refcounted_frames not set, it is a |
|
* decoder, or requires flush |
|
* AVERROR(ENOMEM): failed to add packet to internal queue, or similar |
|
* other errors: legitimate decoding errors |
|
*/ |
|
int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame); |
|
|
|
/** |
|
* Read encoded data from the encoder. |
|
* |
|
* @param avctx codec context |
|
* @param avpkt This will be set to a reference-counted packet allocated by the |
|
* encoder. Note that the function will always call |
|
* av_frame_unref(frame) before doing anything else. |
|
* @return 0 on success, otherwise negative error code: |
|
* AVERROR(EAGAIN): output is not available in the current state - user |
|
* must try to send input |
|
* AVERROR_EOF: the encoder has been fully flushed, and there will be |
|
* no more output packets |
|
* AVERROR(EINVAL): codec not opened, or it is an encoder |
|
* other errors: legitimate decoding errors |
|
*/ |
|
int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt); |
|
|
|
|
|
/** |
|
* @defgroup lavc_parsing Frame parsing |
|
* @{ |
|
*/ |
|
|
|
enum AVPictureStructure { |
|
AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown |
|
AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field |
|
AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field |
|
AV_PICTURE_STRUCTURE_FRAME, //< coded as frame |
|
}; |
|
|
|
typedef struct AVCodecParserContext { |
|
void *priv_data; |
|
struct AVCodecParser *parser; |
|
int64_t frame_offset; /* offset of the current frame */ |
|
int64_t cur_offset; /* current offset |
|
(incremented by each av_parser_parse()) */ |
|
int64_t next_frame_offset; /* offset of the next frame */ |
|
/* video info */ |
|
int pict_type; /* XXX: Put it back in AVCodecContext. */ |
|
/** |
|
* This field is used for proper frame duration computation in lavf. |
|
* It signals, how much longer the frame duration of the current frame |
|
* is compared to normal frame duration. |
|
* |
|
* frame_duration = (1 + repeat_pict) * time_base |
|
* |
|
* It is used by codecs like H.264 to display telecined material. |
|
*/ |
|
int repeat_pict; /* XXX: Put it back in AVCodecContext. */ |
|
int64_t pts; /* pts of the current frame */ |
|
int64_t dts; /* dts of the current frame */ |
|
|
|
/* private data */ |
|
int64_t last_pts; |
|
int64_t last_dts; |
|
int fetch_timestamp; |
|
|
|
#define AV_PARSER_PTS_NB 4 |
|
int cur_frame_start_index; |
|
int64_t cur_frame_offset[AV_PARSER_PTS_NB]; |
|
int64_t cur_frame_pts[AV_PARSER_PTS_NB]; |
|
int64_t cur_frame_dts[AV_PARSER_PTS_NB]; |
|
|
|
int flags; |
|
#define PARSER_FLAG_COMPLETE_FRAMES 0x0001 |
|
#define PARSER_FLAG_ONCE 0x0002 |
|
/// Set if the parser has a valid file offset |
|
#define PARSER_FLAG_FETCHED_OFFSET 0x0004 |
|
#define PARSER_FLAG_USE_CODEC_TS 0x1000 |
|
|
|
int64_t offset; ///< byte offset from starting packet start |
|
int64_t cur_frame_end[AV_PARSER_PTS_NB]; |
|
|
|
/** |
|
* Set by parser to 1 for key frames and 0 for non-key frames. |
|
* It is initialized to -1, so if the parser doesn't set this flag, |
|
* old-style fallback using AV_PICTURE_TYPE_I picture type as key frames |
|
* will be used. |
|
*/ |
|
int key_frame; |
|
|
|
#if FF_API_CONVERGENCE_DURATION |
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
int64_t convergence_duration; |
|
#endif |
|
|
|
// Timestamp generation support: |
|
/** |
|
* Synchronization point for start of timestamp generation. |
|
* |
|
* Set to >0 for sync point, 0 for no sync point and <0 for undefined |
|
* (default). |
|
* |
|
* For example, this corresponds to presence of H.264 buffering period |
|
* SEI message. |
|
*/ |
|
int dts_sync_point; |
|
|
|
/** |
|
* Offset of the current timestamp against last timestamp sync point in |
|
* units of AVCodecContext.time_base. |
|
* |
|
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
|
* contain a valid timestamp offset. |
|
* |
|
* Note that the timestamp of sync point has usually a nonzero |
|
* dts_ref_dts_delta, which refers to the previous sync point. Offset of |
|
* the next frame after timestamp sync point will be usually 1. |
|
* |
|
* For example, this corresponds to H.264 cpb_removal_delay. |
|
*/ |
|
int dts_ref_dts_delta; |
|
|
|
/** |
|
* Presentation delay of current frame in units of AVCodecContext.time_base. |
|
* |
|
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
|
* contain valid non-negative timestamp delta (presentation time of a frame |
|
* must not lie in the past). |
|
* |
|
* This delay represents the difference between decoding and presentation |
|
* time of the frame. |
|
* |
|
* For example, this corresponds to H.264 dpb_output_delay. |
|
*/ |
|
int pts_dts_delta; |
|
|
|
/** |
|
* Position of the packet in file. |
|
* |
|
* Analogous to cur_frame_pts/dts |
|
*/ |
|
int64_t cur_frame_pos[AV_PARSER_PTS_NB]; |
|
|
|
/** |
|
* Byte position of currently parsed frame in stream. |
|
*/ |
|
int64_t pos; |
|
|
|
/** |
|
* Previous frame byte position. |
|
*/ |
|
int64_t last_pos; |
|
|
|
/** |
|
* Duration of the current frame. |
|
* For audio, this is in units of 1 / AVCodecContext.sample_rate. |
|
* For all other types, this is in units of AVCodecContext.time_base. |
|
*/ |
|
int duration; |
|
|
|
enum AVFieldOrder field_order; |
|
|
|
/** |
|
* Indicate whether a picture is coded as a frame, top field or bottom field. |
|
* |
|
* For example, H.264 field_pic_flag equal to 0 corresponds to |
|
* AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag |
|
* equal to 1 and bottom_field_flag equal to 0 corresponds to |
|
* AV_PICTURE_STRUCTURE_TOP_FIELD. |
|
*/ |
|
enum AVPictureStructure picture_structure; |
|
|
|
/** |
|
* Picture number incremented in presentation or output order. |
|
* This field may be reinitialized at the first picture of a new sequence. |
|
* |
|
* For example, this corresponds to H.264 PicOrderCnt. |
|
*/ |
|
int output_picture_number; |
|
|
|
/** |
|
* Dimensions of the decoded video intended for presentation. |
|
*/ |
|
int width; |
|
int height; |
|
|
|
/** |
|
* Dimensions of the coded video. |
|
*/ |
|
int coded_width; |
|
int coded_height; |
|
|
|
/** |
|
* The format of the coded data, corresponds to enum AVPixelFormat for video |
|
* and for enum AVSampleFormat for audio. |
|
* |
|
* Note that a decoder can have considerable freedom in how exactly it |
|
* decodes the data, so the format reported here might be different from the |
|
* one returned by a decoder. |
|
*/ |
|
int format; |
|
} AVCodecParserContext; |
|
|
|
typedef struct AVCodecParser { |
|
int codec_ids[5]; /* several codec IDs are permitted */ |
|
int priv_data_size; |
|
int (*parser_init)(AVCodecParserContext *s); |
|
/* This callback never returns an error, a negative value means that |
|
* the frame start was in a previous packet. */ |
|
int (*parser_parse)(AVCodecParserContext *s, |
|
AVCodecContext *avctx, |
|
const uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size); |
|
void (*parser_close)(AVCodecParserContext *s); |
|
int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size); |
|
struct AVCodecParser *next; |
|
} AVCodecParser; |
|
|
|
AVCodecParser *av_parser_next(const AVCodecParser *c); |
|
|
|
void av_register_codec_parser(AVCodecParser *parser); |
|
AVCodecParserContext *av_parser_init(int codec_id); |
|
|
|
/** |
|
* Parse a packet. |
|
* |
|
* @param s parser context. |
|
* @param avctx codec context. |
|
* @param poutbuf set to pointer to parsed buffer or NULL if not yet finished. |
|
* @param poutbuf_size set to size of parsed buffer or zero if not yet finished. |
|
* @param buf input buffer. |
|
* @param buf_size buffer size in bytes without the padding. I.e. the full buffer |
|
size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. |
|
To signal EOF, this should be 0 (so that the last frame |
|
can be output). |
|
* @param pts input presentation timestamp. |
|
* @param dts input decoding timestamp. |
|
* @param pos input byte position in stream. |
|
* @return the number of bytes of the input bitstream used. |
|
* |
|
* Example: |
|
* @code |
|
* while(in_len){ |
|
* len = av_parser_parse2(myparser, AVCodecContext, &data, &size, |
|
* in_data, in_len, |
|
* pts, dts, pos); |
|
* in_data += len; |
|
* in_len -= len; |
|
* |
|
* if(size) |
|
* decode_frame(data, size); |
|
* } |
|
* @endcode |
|
*/ |
|
int av_parser_parse2(AVCodecParserContext *s, |
|
AVCodecContext *avctx, |
|
uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size, |
|
int64_t pts, int64_t dts, |
|
int64_t pos); |
|
|
|
/** |
|
* @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed |
|
* @deprecated use AVBitStreamFilter |
|
*/ |
|
int av_parser_change(AVCodecParserContext *s, |
|
AVCodecContext *avctx, |
|
uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size, int keyframe); |
|
void av_parser_close(AVCodecParserContext *s); |
|
|
|
/** |
|
* @} |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @addtogroup lavc_encoding |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Find a registered encoder with a matching codec ID. |
|
* |
|
* @param id AVCodecID of the requested encoder |
|
* @return An encoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_encoder(enum AVCodecID id); |
|
|
|
/** |
|
* Find a registered encoder with the specified name. |
|
* |
|
* @param name name of the requested encoder |
|
* @return An encoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_encoder_by_name(const char *name); |
|
|
|
/** |
|
* Encode a frame of audio. |
|
* |
|
* Takes input samples from frame and writes the next output packet, if |
|
* available, to avpkt. The output packet does not necessarily contain data for |
|
* the most recent frame, as encoders can delay, split, and combine input frames |
|
* internally as needed. |
|
* |
|
* @param avctx codec context |
|
* @param avpkt output AVPacket. |
|
* The user can supply an output buffer by setting |
|
* avpkt->data and avpkt->size prior to calling the |
|
* function, but if the size of the user-provided data is not |
|
* large enough, encoding will fail. If avpkt->data and |
|
* avpkt->size are set, avpkt->destruct must also be set. All |
|
* other AVPacket fields will be reset by the encoder using |
|
* av_init_packet(). If avpkt->data is NULL, the encoder will |
|
* allocate it. The encoder will set avpkt->size to the size |
|
* of the output packet. |
|
* |
|
* If this function fails or produces no output, avpkt will be |
|
* freed using av_packet_unref(). |
|
* @param[in] frame AVFrame containing the raw audio data to be encoded. |
|
* May be NULL when flushing an encoder that has the |
|
* AV_CODEC_CAP_DELAY capability set. |
|
* If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame |
|
* can have any number of samples. |
|
* If it is not set, frame->nb_samples must be equal to |
|
* avctx->frame_size for all frames except the last. |
|
* The final frame may be smaller than avctx->frame_size. |
|
* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
|
* output packet is non-empty, and to 0 if it is |
|
* empty. If the function returns an error, the |
|
* packet can be assumed to be invalid, and the |
|
* value of got_packet_ptr is undefined and should |
|
* not be used. |
|
* @return 0 on success, negative error code on failure |
|
* |
|
* @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead |
|
*/ |
|
attribute_deprecated |
|
int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, |
|
const AVFrame *frame, int *got_packet_ptr); |
|
|
|
/** |
|
* Encode a frame of video. |
|
* |
|
* Takes input raw video data from frame and writes the next output packet, if |
|
* available, to avpkt. The output packet does not necessarily contain data for |
|
* the most recent frame, as encoders can delay and reorder input frames |
|
* internally as needed. |
|
* |
|
* @param avctx codec context |
|
* @param avpkt output AVPacket. |
|
* The user can supply an output buffer by setting |
|
* avpkt->data and avpkt->size prior to calling the |
|
* function, but if the size of the user-provided data is not |
|
* large enough, encoding will fail. All other AVPacket fields |
|
* will be reset by the encoder using av_init_packet(). If |
|
* avpkt->data is NULL, the encoder will allocate it. |
|
* The encoder will set avpkt->size to the size of the |
|
* output packet. The returned data (if any) belongs to the |
|
* caller, he is responsible for freeing it. |
|
* |
|
* If this function fails or produces no output, avpkt will be |
|
* freed using av_packet_unref(). |
|
* @param[in] frame AVFrame containing the raw video data to be encoded. |
|
* May be NULL when flushing an encoder that has the |
|
* AV_CODEC_CAP_DELAY capability set. |
|
* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
|
* output packet is non-empty, and to 0 if it is |
|
* empty. If the function returns an error, the |
|
* packet can be assumed to be invalid, and the |
|
* value of got_packet_ptr is undefined and should |
|
* not be used. |
|
* @return 0 on success, negative error code on failure |
|
* |
|
* @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead |
|
*/ |
|
attribute_deprecated |
|
int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, |
|
const AVFrame *frame, int *got_packet_ptr); |
|
|
|
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
|
const AVSubtitle *sub); |
|
|
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#if FF_API_AVCODEC_RESAMPLE |
|
/** |
|
* @defgroup lavc_resample Audio resampling |
|
* @ingroup libavc |
|
* @deprecated use libswresample instead |
|
* |
|
* @{ |
|
*/ |
|
struct ReSampleContext; |
|
struct AVResampleContext; |
|
|
|
typedef struct ReSampleContext ReSampleContext; |
|
|
|
/** |
|
* Initialize audio resampling context. |
|
* |
|
* @param output_channels number of output channels |
|
* @param input_channels number of input channels |
|
* @param output_rate output sample rate |
|
* @param input_rate input sample rate |
|
* @param sample_fmt_out requested output sample format |
|
* @param sample_fmt_in input sample format |
|
* @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency |
|
* @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
|
* @param linear if 1 then the used FIR filter will be linearly interpolated |
|
between the 2 closest, if 0 the closest will be used |
|
* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
|
* @return allocated ReSampleContext, NULL if error occurred |
|
*/ |
|
attribute_deprecated |
|
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels, |
|
int output_rate, int input_rate, |
|
enum AVSampleFormat sample_fmt_out, |
|
enum AVSampleFormat sample_fmt_in, |
|
int filter_length, int log2_phase_count, |
|
int linear, double cutoff); |
|
|
|
attribute_deprecated |
|
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); |
|
|
|
/** |
|
* Free resample context. |
|
* |
|
* @param s a non-NULL pointer to a resample context previously |
|
* created with av_audio_resample_init() |
|
*/ |
|
attribute_deprecated |
|
void audio_resample_close(ReSampleContext *s); |
|
|
|
|
|
/** |
|
* Initialize an audio resampler. |
|
* Note, if either rate is not an integer then simply scale both rates up so they are. |
|
* @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq |
|
* @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
|
* @param linear If 1 then the used FIR filter will be linearly interpolated |
|
between the 2 closest, if 0 the closest will be used |
|
* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
|
*/ |
|
attribute_deprecated |
|
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); |
|
|
|
/** |
|
* Resample an array of samples using a previously configured context. |
|
* @param src an array of unconsumed samples |
|
* @param consumed the number of samples of src which have been consumed are returned here |
|
* @param src_size the number of unconsumed samples available |
|
* @param dst_size the amount of space in samples available in dst |
|
* @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context. |
|
* @return the number of samples written in dst or -1 if an error occurred |
|
*/ |
|
attribute_deprecated |
|
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); |
|
|
|
|
|
/** |
|
* Compensate samplerate/timestamp drift. The compensation is done by changing |
|
* the resampler parameters, so no audible clicks or similar distortions occur |
|
* @param compensation_distance distance in output samples over which the compensation should be performed |
|
* @param sample_delta number of output samples which should be output less |
|
* |
|
* example: av_resample_compensate(c, 10, 500) |
|
* here instead of 510 samples only 500 samples would be output |
|
* |
|
* note, due to rounding the actual compensation might be slightly different, |
|
* especially if the compensation_distance is large and the in_rate used during init is small |
|
*/ |
|
attribute_deprecated |
|
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); |
|
attribute_deprecated |
|
void av_resample_close(struct AVResampleContext *c); |
|
|
|
/** |
|
* @} |
|
*/ |
|
#endif |
|
|
|
#if FF_API_AVPICTURE |
|
/** |
|
* @addtogroup lavc_picture |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
void avpicture_free(AVPicture *picture); |
|
|
|
/** |
|
* @deprecated use av_image_fill_arrays() instead. |
|
*/ |
|
attribute_deprecated |
|
int avpicture_fill(AVPicture *picture, const uint8_t *ptr, |
|
enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* @deprecated use av_image_copy_to_buffer() instead. |
|
*/ |
|
attribute_deprecated |
|
int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, |
|
int width, int height, |
|
unsigned char *dest, int dest_size); |
|
|
|
/** |
|
* @deprecated use av_image_get_buffer_size() instead. |
|
*/ |
|
attribute_deprecated |
|
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* @deprecated av_image_copy() instead. |
|
*/ |
|
attribute_deprecated |
|
void av_picture_copy(AVPicture *dst, const AVPicture *src, |
|
enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
int av_picture_crop(AVPicture *dst, const AVPicture *src, |
|
enum AVPixelFormat pix_fmt, int top_band, int left_band); |
|
|
|
/** |
|
* @deprecated unused |
|
*/ |
|
attribute_deprecated |
|
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, |
|
int padtop, int padbottom, int padleft, int padright, int *color); |
|
|
|
/** |
|
* @} |
|
*/ |
|
#endif |
|
|
|
/** |
|
* @defgroup lavc_misc Utility functions |
|
* @ingroup libavc |
|
* |
|
* Miscellaneous utility functions related to both encoding and decoding |
|
* (or neither). |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* @defgroup lavc_misc_pixfmt Pixel formats |
|
* |
|
* Functions for working with pixel formats. |
|
* @{ |
|
*/ |
|
|
|
#if FF_API_GETCHROMA |
|
/** |
|
* @deprecated Use av_pix_fmt_get_chroma_sub_sample |
|
*/ |
|
|
|
attribute_deprecated |
|
void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); |
|
#endif |
|
|
|
/** |
|
* Return a value representing the fourCC code associated to the |
|
* pixel format pix_fmt, or 0 if no associated fourCC code can be |
|
* found. |
|
*/ |
|
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt); |
|
|
|
/** |
|
* @deprecated see av_get_pix_fmt_loss() |
|
*/ |
|
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, |
|
int has_alpha); |
|
|
|
/** |
|
* Find the best pixel format to convert to given a certain source pixel |
|
* format. When converting from one pixel format to another, information loss |
|
* may occur. For example, when converting from RGB24 to GRAY, the color |
|
* information will be lost. Similarly, other losses occur when converting from |
|
* some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of |
|
* the given pixel formats should be used to suffer the least amount of loss. |
|
* The pixel formats from which it chooses one, are determined by the |
|
* pix_fmt_list parameter. |
|
* |
|
* |
|
* @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from |
|
* @param[in] src_pix_fmt source pixel format |
|
* @param[in] has_alpha Whether the source pixel format alpha channel is used. |
|
* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. |
|
* @return The best pixel format to convert to or -1 if none was found. |
|
*/ |
|
enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, |
|
enum AVPixelFormat src_pix_fmt, |
|
int has_alpha, int *loss_ptr); |
|
|
|
/** |
|
* @deprecated see av_find_best_pix_fmt_of_2() |
|
*/ |
|
enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
|
enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
|
|
|
attribute_deprecated |
|
enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
|
enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
|
|
|
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#if FF_API_SET_DIMENSIONS |
|
/** |
|
* @deprecated this function is not supposed to be used from outside of lavc |
|
*/ |
|
attribute_deprecated |
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
|
#endif |
|
|
|
#if FF_API_TAG_STRING |
|
/** |
|
* Put a string representing the codec tag codec_tag in buf. |
|
* |
|
* @param buf buffer to place codec tag in |
|
* @param buf_size size in bytes of buf |
|
* @param codec_tag codec tag to assign |
|
* @return the length of the string that would have been generated if |
|
* enough space had been available, excluding the trailing null |
|
* |
|
* @deprecated see av_fourcc_make_string() and av_fourcc2str(). |
|
*/ |
|
attribute_deprecated |
|
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); |
|
#endif |
|
|
|
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); |
|
|
|
/** |
|
* Return a name for the specified profile, if available. |
|
* |
|
* @param codec the codec that is searched for the given profile |
|
* @param profile the profile value for which a name is requested |
|
* @return A name for the profile if found, NULL otherwise. |
|
*/ |
|
const char *av_get_profile_name(const AVCodec *codec, int profile); |
|
|
|
/** |
|
* Return a name for the specified profile, if available. |
|
* |
|
* @param codec_id the ID of the codec to which the requested profile belongs |
|
* @param profile the profile value for which a name is requested |
|
* @return A name for the profile if found, NULL otherwise. |
|
* |
|
* @note unlike av_get_profile_name(), which searches a list of profiles |
|
* supported by a specific decoder or encoder implementation, this |
|
* function searches the list of profiles from the AVCodecDescriptor |
|
*/ |
|
const char *avcodec_profile_name(enum AVCodecID codec_id, int profile); |
|
|
|
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); |
|
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count); |
|
//FIXME func typedef |
|
|
|
/** |
|
* Fill AVFrame audio data and linesize pointers. |
|
* |
|
* The buffer buf must be a preallocated buffer with a size big enough |
|
* to contain the specified samples amount. The filled AVFrame data |
|
* pointers will point to this buffer. |
|
* |
|
* AVFrame extended_data channel pointers are allocated if necessary for |
|
* planar audio. |
|
* |
|
* @param frame the AVFrame |
|
* frame->nb_samples must be set prior to calling the |
|
* function. This function fills in frame->data, |
|
* frame->extended_data, frame->linesize[0]. |
|
* @param nb_channels channel count |
|
* @param sample_fmt sample format |
|
* @param buf buffer to use for frame data |
|
* @param buf_size size of buffer |
|
* @param align plane size sample alignment (0 = default) |
|
* @return >=0 on success, negative error code on failure |
|
* @todo return the size in bytes required to store the samples in |
|
* case of success, at the next libavutil bump |
|
*/ |
|
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, |
|
enum AVSampleFormat sample_fmt, const uint8_t *buf, |
|
int buf_size, int align); |
|
|
|
/** |
|
* Reset the internal decoder state / flush internal buffers. Should be called |
|
* e.g. when seeking or when switching to a different stream. |
|
* |
|
* @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), |
|
* this invalidates the frames previously returned from the decoder. When |
|
* refcounted frames are used, the decoder just releases any references it might |
|
* keep internally, but the caller's reference remains valid. |
|
*/ |
|
void avcodec_flush_buffers(AVCodecContext *avctx); |
|
|
|
/** |
|
* Return codec bits per sample. |
|
* |
|
* @param[in] codec_id the codec |
|
* @return Number of bits per sample or zero if unknown for the given codec. |
|
*/ |
|
int av_get_bits_per_sample(enum AVCodecID codec_id); |
|
|
|
/** |
|
* Return the PCM codec associated with a sample format. |
|
* @param be endianness, 0 for little, 1 for big, |
|
* -1 (or anything else) for native |
|
* @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE |
|
*/ |
|
enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be); |
|
|
|
/** |
|
* Return codec bits per sample. |
|
* Only return non-zero if the bits per sample is exactly correct, not an |
|
* approximation. |
|
* |
|
* @param[in] codec_id the codec |
|
* @return Number of bits per sample or zero if unknown for the given codec. |
|
*/ |
|
int av_get_exact_bits_per_sample(enum AVCodecID codec_id); |
|
|
|
/** |
|
* Return audio frame duration. |
|
* |
|
* @param avctx codec context |
|
* @param frame_bytes size of the frame, or 0 if unknown |
|
* @return frame duration, in samples, if known. 0 if not able to |
|
* determine. |
|
*/ |
|
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes); |
|
|
|
/** |
|
* This function is the same as av_get_audio_frame_duration(), except it works |
|
* with AVCodecParameters instead of an AVCodecContext. |
|
*/ |
|
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes); |
|
|
|
#if FF_API_OLD_BSF |
|
typedef struct AVBitStreamFilterContext { |
|
void *priv_data; |
|
const struct AVBitStreamFilter *filter; |
|
AVCodecParserContext *parser; |
|
struct AVBitStreamFilterContext *next; |
|
/** |
|
* Internal default arguments, used if NULL is passed to av_bitstream_filter_filter(). |
|
* Not for access by library users. |
|
*/ |
|
char *args; |
|
} AVBitStreamFilterContext; |
|
#endif |
|
|
|
typedef struct AVBSFInternal AVBSFInternal; |
|
|
|
/** |
|
* The bitstream filter state. |
|
* |
|
* This struct must be allocated with av_bsf_alloc() and freed with |
|
* av_bsf_free(). |
|
* |
|
* The fields in the struct will only be changed (by the caller or by the |
|
* filter) as described in their documentation, and are to be considered |
|
* immutable otherwise. |
|
*/ |
|
typedef struct AVBSFContext { |
|
/** |
|
* A class for logging and AVOptions |
|
*/ |
|
const AVClass *av_class; |
|
|
|
/** |
|
* The bitstream filter this context is an instance of. |
|
*/ |
|
const struct AVBitStreamFilter *filter; |
|
|
|
/** |
|
* Opaque libavcodec internal data. Must not be touched by the caller in any |
|
* way. |
|
*/ |
|
AVBSFInternal *internal; |
|
|
|
/** |
|
* Opaque filter-specific private data. If filter->priv_class is non-NULL, |
|
* this is an AVOptions-enabled struct. |
|
*/ |
|
void *priv_data; |
|
|
|
/** |
|
* Parameters of the input stream. This field is allocated in |
|
* av_bsf_alloc(), it needs to be filled by the caller before |
|
* av_bsf_init(). |
|
*/ |
|
AVCodecParameters *par_in; |
|
|
|
/** |
|
* Parameters of the output stream. This field is allocated in |
|
* av_bsf_alloc(), it is set by the filter in av_bsf_init(). |
|
*/ |
|
AVCodecParameters *par_out; |
|
|
|
/** |
|
* The timebase used for the timestamps of the input packets. Set by the |
|
* caller before av_bsf_init(). |
|
*/ |
|
AVRational time_base_in; |
|
|
|
/** |
|
* The timebase used for the timestamps of the output packets. Set by the |
|
* filter in av_bsf_init(). |
|
*/ |
|
AVRational time_base_out; |
|
} AVBSFContext; |
|
|
|
typedef struct AVBitStreamFilter { |
|
const char *name; |
|
|
|
/** |
|
* A list of codec ids supported by the filter, terminated by |
|
* AV_CODEC_ID_NONE. |
|
* May be NULL, in that case the bitstream filter works with any codec id. |
|
*/ |
|
const enum AVCodecID *codec_ids; |
|
|
|
/** |
|
* A class for the private data, used to declare bitstream filter private |
|
* AVOptions. This field is NULL for bitstream filters that do not declare |
|
* any options. |
|
* |
|
* If this field is non-NULL, the first member of the filter private data |
|
* must be a pointer to AVClass, which will be set by libavcodec generic |
|
* code to this class. |
|
*/ |
|
const AVClass *priv_class; |
|
|
|
/***************************************************************** |
|
* No fields below this line are part of the public API. They |
|
* may not be used outside of libavcodec and can be changed and |
|
* removed at will. |
|
* New public fields should be added right above. |
|
***************************************************************** |
|
*/ |
|
|
|
int priv_data_size; |
|
int (*init)(AVBSFContext *ctx); |
|
int (*filter)(AVBSFContext *ctx, AVPacket *pkt); |
|
void (*close)(AVBSFContext *ctx); |
|
} AVBitStreamFilter; |
|
|
|
#if FF_API_OLD_BSF |
|
/** |
|
* Register a bitstream filter. |
|
* |
|
* The filter will be accessible to the application code through |
|
* av_bitstream_filter_next() or can be directly initialized with |
|
* av_bitstream_filter_init(). |
|
* |
|
* @see avcodec_register_all() |
|
*/ |
|
attribute_deprecated |
|
void av_register_bitstream_filter(AVBitStreamFilter *bsf); |
|
|
|
/** |
|
* Create and initialize a bitstream filter context given a bitstream |
|
* filter name. |
|
* |
|
* The returned context must be freed with av_bitstream_filter_close(). |
|
* |
|
* @param name the name of the bitstream filter |
|
* @return a bitstream filter context if a matching filter was found |
|
* and successfully initialized, NULL otherwise |
|
*/ |
|
attribute_deprecated |
|
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); |
|
|
|
/** |
|
* Filter bitstream. |
|
* |
|
* This function filters the buffer buf with size buf_size, and places the |
|
* filtered buffer in the buffer pointed to by poutbuf. |
|
* |
|
* The output buffer must be freed by the caller. |
|
* |
|
* @param bsfc bitstream filter context created by av_bitstream_filter_init() |
|
* @param avctx AVCodecContext accessed by the filter, may be NULL. |
|
* If specified, this must point to the encoder context of the |
|
* output stream the packet is sent to. |
|
* @param args arguments which specify the filter configuration, may be NULL |
|
* @param poutbuf pointer which is updated to point to the filtered buffer |
|
* @param poutbuf_size pointer which is updated to the filtered buffer size in bytes |
|
* @param buf buffer containing the data to filter |
|
* @param buf_size size in bytes of buf |
|
* @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data |
|
* @return >= 0 in case of success, or a negative error code in case of failure |
|
* |
|
* If the return value is positive, an output buffer is allocated and |
|
* is available in *poutbuf, and is distinct from the input buffer. |
|
* |
|
* If the return value is 0, the output buffer is not allocated and |
|
* should be considered identical to the input buffer, or in case |
|
* *poutbuf was set it points to the input buffer (not necessarily to |
|
* its starting address). A special case is if *poutbuf was set to NULL and |
|
* *poutbuf_size was set to 0, which indicates the packet should be dropped. |
|
*/ |
|
attribute_deprecated |
|
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, |
|
AVCodecContext *avctx, const char *args, |
|
uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size, int keyframe); |
|
|
|
/** |
|
* Release bitstream filter context. |
|
* |
|
* @param bsf the bitstream filter context created with |
|
* av_bitstream_filter_init(), can be NULL |
|
*/ |
|
attribute_deprecated |
|
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); |
|
|
|
/** |
|
* If f is NULL, return the first registered bitstream filter, |
|
* if f is non-NULL, return the next registered bitstream filter |
|
* after f, or NULL if f is the last one. |
|
* |
|
* This function can be used to iterate over all registered bitstream |
|
* filters. |
|
*/ |
|
attribute_deprecated |
|
AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f); |
|
#endif |
|
|
|
/** |
|
* @return a bitstream filter with the specified name or NULL if no such |
|
* bitstream filter exists. |
|
*/ |
|
const AVBitStreamFilter *av_bsf_get_by_name(const char *name); |
|
|
|
/** |
|
* Iterate over all registered bitstream filters. |
|
* |
|
* @param opaque a pointer where libavcodec will store the iteration state. Must |
|
* point to NULL to start the iteration. |
|
* |
|
* @return the next registered bitstream filter or NULL when the iteration is |
|
* finished |
|
*/ |
|
const AVBitStreamFilter *av_bsf_next(void **opaque); |
|
|
|
/** |
|
* Allocate a context for a given bitstream filter. The caller must fill in the |
|
* context parameters as described in the documentation and then call |
|
* av_bsf_init() before sending any data to the filter. |
|
* |
|
* @param filter the filter for which to allocate an instance. |
|
* @param ctx a pointer into which the pointer to the newly-allocated context |
|
* will be written. It must be freed with av_bsf_free() after the |
|
* filtering is done. |
|
* |
|
* @return 0 on success, a negative AVERROR code on failure |
|
*/ |
|
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx); |
|
|
|
/** |
|
* Prepare the filter for use, after all the parameters and options have been |
|
* set. |
|
*/ |
|
int av_bsf_init(AVBSFContext *ctx); |
|
|
|
/** |
|
* Submit a packet for filtering. |
|
* |
|
* After sending each packet, the filter must be completely drained by calling |
|
* av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or |
|
* AVERROR_EOF. |
|
* |
|
* @param pkt the packet to filter. The bitstream filter will take ownership of |
|
* the packet and reset the contents of pkt. pkt is not touched if an error occurs. |
|
* This parameter may be NULL, which signals the end of the stream (i.e. no more |
|
* packets will be sent). That will cause the filter to output any packets it |
|
* may have buffered internally. |
|
* |
|
* @return 0 on success, a negative AVERROR on error. |
|
*/ |
|
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt); |
|
|
|
/** |
|
* Retrieve a filtered packet. |
|
* |
|
* @param[out] pkt this struct will be filled with the contents of the filtered |
|
* packet. It is owned by the caller and must be freed using |
|
* av_packet_unref() when it is no longer needed. |
|
* This parameter should be "clean" (i.e. freshly allocated |
|
* with av_packet_alloc() or unreffed with av_packet_unref()) |
|
* when this function is called. If this function returns |
|
* successfully, the contents of pkt will be completely |
|
* overwritten by the returned data. On failure, pkt is not |
|
* touched. |
|
* |
|
* @return 0 on success. AVERROR(EAGAIN) if more packets need to be sent to the |
|
* filter (using av_bsf_send_packet()) to get more output. AVERROR_EOF if there |
|
* will be no further output from the filter. Another negative AVERROR value if |
|
* an error occurs. |
|
* |
|
* @note one input packet may result in several output packets, so after sending |
|
* a packet with av_bsf_send_packet(), this function needs to be called |
|
* repeatedly until it stops returning 0. It is also possible for a filter to |
|
* output fewer packets than were sent to it, so this function may return |
|
* AVERROR(EAGAIN) immediately after a successful av_bsf_send_packet() call. |
|
*/ |
|
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt); |
|
|
|
/** |
|
* Free a bitstream filter context and everything associated with it; write NULL |
|
* into the supplied pointer. |
|
*/ |
|
void av_bsf_free(AVBSFContext **ctx); |
|
|
|
/** |
|
* Get the AVClass for AVBSFContext. It can be used in combination with |
|
* AV_OPT_SEARCH_FAKE_OBJ for examining options. |
|
* |
|
* @see av_opt_find(). |
|
*/ |
|
const AVClass *av_bsf_get_class(void); |
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|
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/** |
|
* Structure for chain/list of bitstream filters. |
|
* Empty list can be allocated by av_bsf_list_alloc(). |
|
*/ |
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typedef struct AVBSFList AVBSFList; |
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|
|
/** |
|
* Allocate empty list of bitstream filters. |
|
* The list must be later freed by av_bsf_list_free() |
|
* or finalized by av_bsf_list_finalize(). |
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* |
|
* @return Pointer to @ref AVBSFList on success, NULL in case of failure |
|
*/ |
|
AVBSFList *av_bsf_list_alloc(void); |
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|
|
/** |
|
* Free list of bitstream filters. |
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* |
|
* @param lst Pointer to pointer returned by av_bsf_list_alloc() |
|
*/ |
|
void av_bsf_list_free(AVBSFList **lst); |
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|
|
/** |
|
* Append bitstream filter to the list of bitstream filters. |
|
* |
|
* @param lst List to append to |
|
* @param bsf Filter context to be appended |
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* |
|
* @return >=0 on success, negative AVERROR in case of failure |
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*/ |
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int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf); |
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|
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/** |
|
* Construct new bitstream filter context given it's name and options |
|
* and append it to the list of bitstream filters. |
|
* |
|
* @param lst List to append to |
|
* @param bsf_name Name of the bitstream filter |
|
* @param options Options for the bitstream filter, can be set to NULL |
|
* |
|
* @return >=0 on success, negative AVERROR in case of failure |
|
*/ |
|
int av_bsf_list_append2(AVBSFList *lst, const char * bsf_name, AVDictionary **options); |
|
/** |
|
* Finalize list of bitstream filters. |
|
* |
|
* This function will transform @ref AVBSFList to single @ref AVBSFContext, |
|
* so the whole chain of bitstream filters can be treated as single filter |
|
* freshly allocated by av_bsf_alloc(). |
|
* If the call is successful, @ref AVBSFList structure is freed and lst |
|
* will be set to NULL. In case of failure, caller is responsible for |
|
* freeing the structure by av_bsf_list_free() |
|
* |
|
* @param lst Filter list structure to be transformed |
|
* @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure |
|
* representing the chain of bitstream filters |
|
* |
|
* @return >=0 on success, negative AVERROR in case of failure |
|
*/ |
|
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf); |
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|
|
/** |
|
* Parse string describing list of bitstream filters and create single |
|
* @ref AVBSFContext describing the whole chain of bitstream filters. |
|
* Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext freshly |
|
* allocated by av_bsf_alloc(). |
|
* |
|
* @param str String describing chain of bitstream filters in format |
|
* `bsf1[=opt1=val1:opt2=val2][,bsf2]` |
|
* @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure |
|
* representing the chain of bitstream filters |
|
* |
|
* @return >=0 on success, negative AVERROR in case of failure |
|
*/ |
|
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf); |
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|
|
/** |
|
* Get null/pass-through bitstream filter. |
|
* |
|
* @param[out] bsf Pointer to be set to new instance of pass-through bitstream filter |
|
* |
|
* @return |
|
*/ |
|
int av_bsf_get_null_filter(AVBSFContext **bsf); |
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|
|
/* memory */ |
|
|
|
/** |
|
* Same behaviour av_fast_malloc but the buffer has additional |
|
* AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0. |
|
* |
|
* In addition the whole buffer will initially and after resizes |
|
* be 0-initialized so that no uninitialized data will ever appear. |
|
*/ |
|
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size); |
|
|
|
/** |
|
* Same behaviour av_fast_padded_malloc except that buffer will always |
|
* be 0-initialized after call. |
|
*/ |
|
void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size); |
|
|
|
/** |
|
* Encode extradata length to a buffer. Used by xiph codecs. |
|
* |
|
* @param s buffer to write to; must be at least (v/255+1) bytes long |
|
* @param v size of extradata in bytes |
|
* @return number of bytes written to the buffer. |
|
*/ |
|
unsigned int av_xiphlacing(unsigned char *s, unsigned int v); |
|
|
|
#if FF_API_MISSING_SAMPLE |
|
/** |
|
* Log a generic warning message about a missing feature. This function is |
|
* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
|
* only, and would normally not be used by applications. |
|
* @param[in] avc a pointer to an arbitrary struct of which the first field is |
|
* a pointer to an AVClass struct |
|
* @param[in] feature string containing the name of the missing feature |
|
* @param[in] want_sample indicates if samples are wanted which exhibit this feature. |
|
* If want_sample is non-zero, additional verbiage will be added to the log |
|
* message which tells the user how to report samples to the development |
|
* mailing list. |
|
* @deprecated Use avpriv_report_missing_feature() instead. |
|
*/ |
|
attribute_deprecated |
|
void av_log_missing_feature(void *avc, const char *feature, int want_sample); |
|
|
|
/** |
|
* Log a generic warning message asking for a sample. This function is |
|
* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
|
* only, and would normally not be used by applications. |
|
* @param[in] avc a pointer to an arbitrary struct of which the first field is |
|
* a pointer to an AVClass struct |
|
* @param[in] msg string containing an optional message, or NULL if no message |
|
* @deprecated Use avpriv_request_sample() instead. |
|
*/ |
|
attribute_deprecated |
|
void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); |
|
#endif /* FF_API_MISSING_SAMPLE */ |
|
|
|
/** |
|
* Register the hardware accelerator hwaccel. |
|
*/ |
|
void av_register_hwaccel(AVHWAccel *hwaccel); |
|
|
|
/** |
|
* If hwaccel is NULL, returns the first registered hardware accelerator, |
|
* if hwaccel is non-NULL, returns the next registered hardware accelerator |
|
* after hwaccel, or NULL if hwaccel is the last one. |
|
*/ |
|
AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel); |
|
|
|
|
|
/** |
|
* Lock operation used by lockmgr |
|
*/ |
|
enum AVLockOp { |
|
AV_LOCK_CREATE, ///< Create a mutex |
|
AV_LOCK_OBTAIN, ///< Lock the mutex |
|
AV_LOCK_RELEASE, ///< Unlock the mutex |
|
AV_LOCK_DESTROY, ///< Free mutex resources |
|
}; |
|
|
|
/** |
|
* Register a user provided lock manager supporting the operations |
|
* specified by AVLockOp. The "mutex" argument to the function points |
|
* to a (void *) where the lockmgr should store/get a pointer to a user |
|
* allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the |
|
* value left by the last call for all other ops. If the lock manager is |
|
* unable to perform the op then it should leave the mutex in the same |
|
* state as when it was called and return a non-zero value. However, |
|
* when called with AV_LOCK_DESTROY the mutex will always be assumed to |
|
* have been successfully destroyed. If av_lockmgr_register succeeds |
|
* it will return a non-negative value, if it fails it will return a |
|
* negative value and destroy all mutex and unregister all callbacks. |
|
* av_lockmgr_register is not thread-safe, it must be called from a |
|
* single thread before any calls which make use of locking are used. |
|
* |
|
* @param cb User defined callback. av_lockmgr_register invokes calls |
|
* to this callback and the previously registered callback. |
|
* The callback will be used to create more than one mutex |
|
* each of which must be backed by its own underlying locking |
|
* mechanism (i.e. do not use a single static object to |
|
* implement your lock manager). If cb is set to NULL the |
|
* lockmgr will be unregistered. |
|
*/ |
|
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); |
|
|
|
/** |
|
* Get the type of the given codec. |
|
*/ |
|
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id); |
|
|
|
/** |
|
* Get the name of a codec. |
|
* @return a static string identifying the codec; never NULL |
|
*/ |
|
const char *avcodec_get_name(enum AVCodecID id); |
|
|
|
/** |
|
* @return a positive value if s is open (i.e. avcodec_open2() was called on it |
|
* with no corresponding avcodec_close()), 0 otherwise. |
|
*/ |
|
int avcodec_is_open(AVCodecContext *s); |
|
|
|
/** |
|
* @return a non-zero number if codec is an encoder, zero otherwise |
|
*/ |
|
int av_codec_is_encoder(const AVCodec *codec); |
|
|
|
/** |
|
* @return a non-zero number if codec is a decoder, zero otherwise |
|
*/ |
|
int av_codec_is_decoder(const AVCodec *codec); |
|
|
|
/** |
|
* @return descriptor for given codec ID or NULL if no descriptor exists. |
|
*/ |
|
const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); |
|
|
|
/** |
|
* Iterate over all codec descriptors known to libavcodec. |
|
* |
|
* @param prev previous descriptor. NULL to get the first descriptor. |
|
* |
|
* @return next descriptor or NULL after the last descriptor |
|
*/ |
|
const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev); |
|
|
|
/** |
|
* @return codec descriptor with the given name or NULL if no such descriptor |
|
* exists. |
|
*/ |
|
const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); |
|
|
|
/** |
|
* Allocate a CPB properties structure and initialize its fields to default |
|
* values. |
|
* |
|
* @param size if non-NULL, the size of the allocated struct will be written |
|
* here. This is useful for embedding it in side data. |
|
* |
|
* @return the newly allocated struct or NULL on failure |
|
*/ |
|
AVCPBProperties *av_cpb_properties_alloc(size_t *size); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#endif /* AVCODEC_AVCODEC_H */
|
|
|