mirror of https://github.com/FFmpeg/FFmpeg.git
This will allow to avoid #including the entire avcodec.h in some places.pull/362/head
Anton Khirnov
4 years ago
parent
cf1746d779
commit
ff0a96046d
4 changed files with 182 additions and 138 deletions
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/*
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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_DEFS_H |
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#define AVCODEC_DEFS_H |
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/**
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* @file |
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* @ingroup libavc |
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* Misc types and constants that do not belong anywhere else. |
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*/ |
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#include <stdint.h> |
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#include <stdlib.h> |
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/**
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* @ingroup lavc_decoding |
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* Required number of additionally allocated bytes at the end of the input bitstream for decoding. |
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* This is mainly needed because some optimized bitstream readers read |
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* 32 or 64 bit at once and could read over the end.<br> |
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* Note: If the first 23 bits of the additional bytes are not 0, then damaged |
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* MPEG bitstreams could cause overread and segfault. |
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*/ |
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#define AV_INPUT_BUFFER_PADDING_SIZE 64 |
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/**
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* @ingroup lavc_decoding |
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*/ |
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enum AVDiscard{ |
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/* We leave some space between them for extensions (drop some
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* keyframes for intra-only or drop just some bidir frames). */ |
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AVDISCARD_NONE =-16, ///< discard nothing
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AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
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AVDISCARD_NONREF = 8, ///< discard all non reference
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AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
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AVDISCARD_NONINTRA= 24, ///< discard all non intra frames
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AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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AVDISCARD_ALL = 48, ///< discard all
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}; |
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enum AVAudioServiceType { |
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AV_AUDIO_SERVICE_TYPE_MAIN = 0, |
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AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, |
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AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, |
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AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, |
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AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, |
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AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, |
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AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, |
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AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, |
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AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, |
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AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
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}; |
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/**
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* Pan Scan area. |
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* This specifies the area which should be displayed. |
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* Note there may be multiple such areas for one frame. |
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*/ |
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typedef struct AVPanScan { |
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/**
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* id |
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* - encoding: Set by user. |
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* - decoding: Set by libavcodec. |
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*/ |
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int id; |
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/**
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* width and height in 1/16 pel |
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* - encoding: Set by user. |
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* - decoding: Set by libavcodec. |
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*/ |
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int width; |
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int height; |
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/**
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* position of the top left corner in 1/16 pel for up to 3 fields/frames |
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* - encoding: Set by user. |
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* - decoding: Set by libavcodec. |
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*/ |
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int16_t position[3][2]; |
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} AVPanScan; |
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/**
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* This structure describes the bitrate properties of an encoded bitstream. It |
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* roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD |
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* parameters for H.264/HEVC. |
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*/ |
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typedef struct AVCPBProperties { |
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/**
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* Maximum bitrate of the stream, in bits per second. |
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* Zero if unknown or unspecified. |
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*/ |
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int64_t max_bitrate; |
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/**
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* Minimum bitrate of the stream, in bits per second. |
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* Zero if unknown or unspecified. |
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*/ |
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int64_t min_bitrate; |
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/**
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* Average bitrate of the stream, in bits per second. |
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* Zero if unknown or unspecified. |
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*/ |
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int64_t avg_bitrate; |
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/**
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* The size of the buffer to which the ratecontrol is applied, in bits. |
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* Zero if unknown or unspecified. |
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*/ |
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int64_t buffer_size; |
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/**
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* The delay between the time the packet this structure is associated with |
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* is received and the time when it should be decoded, in periods of a 27MHz |
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* clock. |
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* |
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* UINT64_MAX when unknown or unspecified. |
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*/ |
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uint64_t vbv_delay; |
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} AVCPBProperties; |
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/**
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* Allocate a CPB properties structure and initialize its fields to default |
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* values. |
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* |
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* @param size if non-NULL, the size of the allocated struct will be written |
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* here. This is useful for embedding it in side data. |
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* |
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* @return the newly allocated struct or NULL on failure |
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*/ |
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AVCPBProperties *av_cpb_properties_alloc(size_t *size); |
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/**
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* This structure supplies correlation between a packet timestamp and a wall clock |
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* production time. The definition follows the Producer Reference Time ('prft') |
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* as defined in ISO/IEC 14496-12 |
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*/ |
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typedef struct AVProducerReferenceTime { |
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/**
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* A UTC timestamp, in microseconds, since Unix epoch (e.g, av_gettime()). |
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*/ |
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int64_t wallclock; |
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int flags; |
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} AVProducerReferenceTime; |
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/**
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* Encode extradata length to a buffer. Used by xiph codecs. |
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* |
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* @param s buffer to write to; must be at least (v/255+1) bytes long |
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* @param v size of extradata in bytes |
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* @return number of bytes written to the buffer. |
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*/ |
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unsigned int av_xiphlacing(unsigned char *s, unsigned int v); |
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#endif // AVCODEC_DEFS_H
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