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5061 lines
167 KiB
5061 lines
167 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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* 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/avutil.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/log.h" |
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#include "libavutil/pixfmt.h" |
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#include "libavutil/rational.h" |
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#include "libavcodec/version.h" |
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/** |
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* @defgroup libavc Encoding/Decoding Library |
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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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/** |
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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 a existing codec ID changes (that would break ABI), |
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* 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec. |
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* This ensures that 2 forks can independently add AVCodecIDs without producing conflicts. |
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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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AV_CODEC_ID_MPEG2VIDEO_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_SNOW, |
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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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AV_CODEC_ID_IFF_BYTERUN1, |
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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_BRENDER_PIX= MKBETAG('B','P','I','X'), |
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AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'), |
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AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'), |
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AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'), |
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AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'), |
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AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'), |
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AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'), |
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AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'), |
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AV_CODEC_ID_TARGA_Y216 = MKBETAG('T','2','1','6'), |
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AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'), |
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AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'), |
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AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'), |
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AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'), |
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AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'), |
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AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'), |
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AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'), |
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AV_CODEC_ID_XFACE = MKBETAG('X','F','A','C'), |
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AV_CODEC_ID_SGIRLE = MKBETAG('S','G','I','R'), |
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AV_CODEC_ID_MVC1 = MKBETAG('M','V','C','1'), |
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AV_CODEC_ID_MVC2 = MKBETAG('M','V','C','2'), |
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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 = MKBETAG(24,'P','S','P'), |
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AV_CODEC_ID_PCM_S32LE_PLANAR = MKBETAG(32,'P','S','P'), |
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AV_CODEC_ID_PCM_S16BE_PLANAR = MKBETAG('P','S','P',16), |
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/* various ADPCM codecs */ |
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AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, |
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AV_CODEC_ID_ADPCM_IMA_WAV, |
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AV_CODEC_ID_ADPCM_IMA_DK3, |
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AV_CODEC_ID_ADPCM_IMA_DK4, |
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AV_CODEC_ID_ADPCM_IMA_WS, |
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AV_CODEC_ID_ADPCM_IMA_SMJPEG, |
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AV_CODEC_ID_ADPCM_MS, |
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AV_CODEC_ID_ADPCM_4XM, |
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AV_CODEC_ID_ADPCM_XA, |
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AV_CODEC_ID_ADPCM_ADX, |
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AV_CODEC_ID_ADPCM_EA, |
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AV_CODEC_ID_ADPCM_G726, |
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AV_CODEC_ID_ADPCM_CT, |
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AV_CODEC_ID_ADPCM_SWF, |
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AV_CODEC_ID_ADPCM_YAMAHA, |
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AV_CODEC_ID_ADPCM_SBPRO_4, |
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AV_CODEC_ID_ADPCM_SBPRO_3, |
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AV_CODEC_ID_ADPCM_SBPRO_2, |
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AV_CODEC_ID_ADPCM_THP, |
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AV_CODEC_ID_ADPCM_IMA_AMV, |
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AV_CODEC_ID_ADPCM_EA_R1, |
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AV_CODEC_ID_ADPCM_EA_R3, |
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AV_CODEC_ID_ADPCM_EA_R2, |
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AV_CODEC_ID_ADPCM_IMA_EA_SEAD, |
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AV_CODEC_ID_ADPCM_IMA_EA_EACS, |
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AV_CODEC_ID_ADPCM_EA_XAS, |
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AV_CODEC_ID_ADPCM_EA_MAXIS_XA, |
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AV_CODEC_ID_ADPCM_IMA_ISS, |
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AV_CODEC_ID_ADPCM_G722, |
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AV_CODEC_ID_ADPCM_IMA_APC, |
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AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'), |
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AV_CODEC_ID_ADPCM_AFC = MKBETAG('A','F','C',' '), |
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AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '), |
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/* AMR */ |
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AV_CODEC_ID_AMR_NB = 0x12000, |
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AV_CODEC_ID_AMR_WB, |
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/* RealAudio codecs*/ |
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AV_CODEC_ID_RA_144 = 0x13000, |
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AV_CODEC_ID_RA_288, |
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/* various DPCM codecs */ |
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AV_CODEC_ID_ROQ_DPCM = 0x14000, |
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AV_CODEC_ID_INTERPLAY_DPCM, |
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AV_CODEC_ID_XAN_DPCM, |
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AV_CODEC_ID_SOL_DPCM, |
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/* audio codecs */ |
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AV_CODEC_ID_MP2 = 0x15000, |
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AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
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AV_CODEC_ID_AAC, |
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AV_CODEC_ID_AC3, |
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AV_CODEC_ID_DTS, |
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AV_CODEC_ID_VORBIS, |
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AV_CODEC_ID_DVAUDIO, |
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AV_CODEC_ID_WMAV1, |
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AV_CODEC_ID_WMAV2, |
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AV_CODEC_ID_MACE3, |
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AV_CODEC_ID_MACE6, |
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AV_CODEC_ID_VMDAUDIO, |
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AV_CODEC_ID_FLAC, |
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AV_CODEC_ID_MP3ADU, |
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AV_CODEC_ID_MP3ON4, |
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AV_CODEC_ID_SHORTEN, |
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AV_CODEC_ID_ALAC, |
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AV_CODEC_ID_WESTWOOD_SND1, |
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AV_CODEC_ID_GSM, ///< as in Berlin toast format |
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AV_CODEC_ID_QDM2, |
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AV_CODEC_ID_COOK, |
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AV_CODEC_ID_TRUESPEECH, |
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AV_CODEC_ID_TTA, |
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AV_CODEC_ID_SMACKAUDIO, |
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AV_CODEC_ID_QCELP, |
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AV_CODEC_ID_WAVPACK, |
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AV_CODEC_ID_DSICINAUDIO, |
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AV_CODEC_ID_IMC, |
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AV_CODEC_ID_MUSEPACK7, |
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AV_CODEC_ID_MLP, |
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AV_CODEC_ID_GSM_MS, /* as found in WAV */ |
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AV_CODEC_ID_ATRAC3, |
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AV_CODEC_ID_VOXWARE, |
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AV_CODEC_ID_APE, |
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AV_CODEC_ID_NELLYMOSER, |
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AV_CODEC_ID_MUSEPACK8, |
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AV_CODEC_ID_SPEEX, |
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AV_CODEC_ID_WMAVOICE, |
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AV_CODEC_ID_WMAPRO, |
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AV_CODEC_ID_WMALOSSLESS, |
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AV_CODEC_ID_ATRAC3P, |
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AV_CODEC_ID_EAC3, |
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AV_CODEC_ID_SIPR, |
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AV_CODEC_ID_MP1, |
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AV_CODEC_ID_TWINVQ, |
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AV_CODEC_ID_TRUEHD, |
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AV_CODEC_ID_MP4ALS, |
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AV_CODEC_ID_ATRAC1, |
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AV_CODEC_ID_BINKAUDIO_RDFT, |
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AV_CODEC_ID_BINKAUDIO_DCT, |
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AV_CODEC_ID_AAC_LATM, |
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AV_CODEC_ID_QDMC, |
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AV_CODEC_ID_CELT, |
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AV_CODEC_ID_G723_1, |
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AV_CODEC_ID_G729, |
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AV_CODEC_ID_8SVX_EXP, |
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AV_CODEC_ID_8SVX_FIB, |
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AV_CODEC_ID_BMV_AUDIO, |
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AV_CODEC_ID_RALF, |
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AV_CODEC_ID_IAC, |
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AV_CODEC_ID_ILBC, |
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AV_CODEC_ID_OPUS_DEPRECATED, |
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AV_CODEC_ID_COMFORT_NOISE, |
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AV_CODEC_ID_TAK_DEPRECATED, |
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AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'), |
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#if LIBAVCODEC_VERSION_MAJOR <= 54 |
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AV_CODEC_ID_8SVX_RAW = MKBETAG('8','S','V','X'), |
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#endif |
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AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'), |
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AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'), |
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AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'), |
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AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'), |
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AV_CODEC_ID_TAK = MKBETAG('t','B','a','K'), |
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|
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/* subtitle codecs */ |
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AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. |
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AV_CODEC_ID_DVD_SUBTITLE = 0x17000, |
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AV_CODEC_ID_DVB_SUBTITLE, |
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AV_CODEC_ID_TEXT, ///< raw UTF-8 text |
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AV_CODEC_ID_XSUB, |
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AV_CODEC_ID_SSA, |
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AV_CODEC_ID_MOV_TEXT, |
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AV_CODEC_ID_HDMV_PGS_SUBTITLE, |
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AV_CODEC_ID_DVB_TELETEXT, |
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AV_CODEC_ID_SRT, |
|
AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'), |
|
AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'), |
|
AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'), |
|
AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'), |
|
AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'), |
|
AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'), |
|
AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'), |
|
AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'), |
|
|
|
/* 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_BINTEXT = MKBETAG('B','T','X','T'), |
|
AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'), |
|
AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'), |
|
AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'), |
|
AV_CODEC_ID_SMPTE_KLV = MKBETAG('K','L','V','A'), |
|
|
|
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. |
|
|
|
#if FF_API_CODEC_ID |
|
#include "old_codec_ids.h" |
|
#endif |
|
}; |
|
|
|
#if FF_API_CODEC_ID |
|
#define CodecID AVCodecID |
|
#endif |
|
|
|
/** |
|
* This struct describes the properties of a single codec described by an |
|
* AVCodecID. |
|
* @see avcodec_get_descriptor() |
|
*/ |
|
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; |
|
} AVCodecDescriptor; |
|
|
|
/** |
|
* Codec uses only intra compression. |
|
* Video 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) |
|
|
|
#if FF_API_OLD_DECODE_AUDIO |
|
/* in bytes */ |
|
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio |
|
#endif |
|
|
|
/** |
|
* @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 FF_INPUT_BUFFER_PADDING_SIZE 16 |
|
|
|
/** |
|
* @ingroup lavc_encoding |
|
* minimum encoding buffer size |
|
* Used to avoid some checks during header writing. |
|
*/ |
|
#define FF_MIN_BUFFER_SIZE 16384 |
|
|
|
|
|
/** |
|
* @ingroup lavc_encoding |
|
* motion estimation type. |
|
*/ |
|
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_ITER, ///< iterative search |
|
ME_TESA, ///< transformed exhaustive search algorithm |
|
}; |
|
|
|
/** |
|
* @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_NONKEY = 32, ///< discard all frames except keyframes |
|
AVDISCARD_ALL = 48, ///< discard all |
|
}; |
|
|
|
enum AVColorPrimaries{ |
|
AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B |
|
AVCOL_PRI_UNSPECIFIED = 2, |
|
AVCOL_PRI_BT470M = 4, |
|
AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM |
|
AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC |
|
AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above |
|
AVCOL_PRI_FILM = 8, |
|
AVCOL_PRI_NB , ///< Not part of ABI |
|
}; |
|
|
|
enum AVColorTransferCharacteristic{ |
|
AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361 |
|
AVCOL_TRC_UNSPECIFIED = 2, |
|
AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM |
|
AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG |
|
AVCOL_TRC_SMPTE240M = 7, |
|
AVCOL_TRC_NB , ///< Not part of ABI |
|
}; |
|
|
|
enum AVColorSpace{ |
|
AVCOL_SPC_RGB = 0, |
|
AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B |
|
AVCOL_SPC_UNSPECIFIED = 2, |
|
AVCOL_SPC_FCC = 4, |
|
AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 |
|
AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above |
|
AVCOL_SPC_SMPTE240M = 7, |
|
AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16 |
|
AVCOL_SPC_NB , ///< Not part of ABI |
|
}; |
|
#define AVCOL_SPC_YCGCO AVCOL_SPC_YCOCG |
|
|
|
enum AVColorRange{ |
|
AVCOL_RANGE_UNSPECIFIED = 0, |
|
AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges |
|
AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges |
|
AVCOL_RANGE_NB , ///< Not part of ABI |
|
}; |
|
|
|
/** |
|
* X X 3 4 X X are luma samples, |
|
* 1 2 1-6 are possible chroma positions |
|
* X X 5 6 X 0 is undefined/unknown position |
|
*/ |
|
enum AVChromaLocation{ |
|
AVCHROMA_LOC_UNSPECIFIED = 0, |
|
AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default |
|
AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263 |
|
AVCHROMA_LOC_TOPLEFT = 3, ///< DV |
|
AVCHROMA_LOC_TOP = 4, |
|
AVCHROMA_LOC_BOTTOMLEFT = 5, |
|
AVCHROMA_LOC_BOTTOM = 6, |
|
AVCHROMA_LOC_NB , ///< Not part of ABI |
|
}; |
|
|
|
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; |
|
|
|
#define FF_MAX_B_FRAMES 16 |
|
|
|
/* encoding support |
|
These flags can be passed in AVCodecContext.flags before initialization. |
|
Note: Not everything is supported yet. |
|
*/ |
|
|
|
#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. |
|
#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. |
|
#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. |
|
#define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
|
#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>. |
|
/** |
|
* The parent program guarantees that the input for B-frames containing |
|
* streams is not written to for at least s->max_b_frames+1 frames, if |
|
* this is not set the input will be copied. |
|
*/ |
|
#define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
|
#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. |
|
#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. |
|
#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. |
|
#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges. |
|
#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. |
|
#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random |
|
location instead of only at frame boundaries. */ |
|
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization. |
|
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. |
|
#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. |
|
#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. |
|
#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). |
|
/* Fx : Flag for h263+ extra options */ |
|
#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction |
|
#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter |
|
#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation |
|
#define CODEC_FLAG_CLOSED_GOP 0x80000000 |
|
#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. |
|
#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. |
|
#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. |
|
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!! |
|
#if FF_API_MPV_GLOBAL_OPTS |
|
#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp. |
|
#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon. |
|
#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size. |
|
#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping |
|
#endif |
|
#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. |
|
#define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe |
|
|
|
/* Unsupported options : |
|
* Syntax Arithmetic coding (SAC) |
|
* Reference Picture Selection |
|
* Independent Segment Decoding */ |
|
/* /Fx */ |
|
/* codec capabilities */ |
|
|
|
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< 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 0x0002 |
|
#define CODEC_CAP_TRUNCATED 0x0008 |
|
/* Codec can export data for HW decoding (XvMC). */ |
|
#define CODEC_CAP_HWACCEL 0x0010 |
|
/** |
|
* 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 0x0020 |
|
/** |
|
* 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 0x0040 |
|
/** |
|
* Codec can export data for HW decoding (VDPAU). |
|
*/ |
|
#define CODEC_CAP_HWACCEL_VDPAU 0x0080 |
|
/** |
|
* 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 carring 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 0x0100 |
|
/** |
|
* Codec is experimental and is thus avoided in favor of non experimental |
|
* encoders |
|
*/ |
|
#define CODEC_CAP_EXPERIMENTAL 0x0200 |
|
/** |
|
* Codec should fill in channel configuration and samplerate instead of container |
|
*/ |
|
#define CODEC_CAP_CHANNEL_CONF 0x0400 |
|
|
|
/** |
|
* Codec is able to deal with negative linesizes |
|
*/ |
|
#define CODEC_CAP_NEG_LINESIZES 0x0800 |
|
|
|
/** |
|
* Codec supports frame-level multithreading. |
|
*/ |
|
#define CODEC_CAP_FRAME_THREADS 0x1000 |
|
/** |
|
* Codec supports slice-based (or partition-based) multithreading. |
|
*/ |
|
#define CODEC_CAP_SLICE_THREADS 0x2000 |
|
/** |
|
* Codec supports changed parameters at any point. |
|
*/ |
|
#define CODEC_CAP_PARAM_CHANGE 0x4000 |
|
/** |
|
* Codec supports avctx->thread_count == 0 (auto). |
|
*/ |
|
#define CODEC_CAP_AUTO_THREADS 0x8000 |
|
/** |
|
* Audio encoder supports receiving a different number of samples in each call. |
|
*/ |
|
#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000 |
|
/** |
|
* Codec is intra only. |
|
*/ |
|
#define CODEC_CAP_INTRA_ONLY 0x40000000 |
|
/** |
|
* Codec is lossless. |
|
*/ |
|
#define CODEC_CAP_LOSSLESS 0x80000000 |
|
|
|
//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 (h264 ref0, mpeg1 0mv, ...) |
|
|
|
/** |
|
* 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; |
|
|
|
#define FF_QSCALE_TYPE_MPEG1 0 |
|
#define FF_QSCALE_TYPE_MPEG2 1 |
|
#define FF_QSCALE_TYPE_H264 2 |
|
#define FF_QSCALE_TYPE_VP56 3 |
|
|
|
#define FF_BUFFER_TYPE_INTERNAL 1 |
|
#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user) |
|
#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared. |
|
#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. |
|
|
|
#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore). |
|
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer. |
|
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content. |
|
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update). |
|
|
|
/** |
|
* @defgroup lavc_packet AVPacket |
|
* |
|
* Types and functions for working with AVPacket. |
|
* @{ |
|
*/ |
|
enum AVPacketSideDataType { |
|
AV_PKT_DATA_PALETTE, |
|
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, |
|
|
|
/** |
|
* 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, |
|
}; |
|
|
|
/** |
|
* 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. |
|
* |
|
* 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 destruct field. |
|
* If it is set, the packet data is dynamically allocated and is valid |
|
* indefinitely until av_free_packet() is called (which in turn calls the |
|
* destruct callback to free the data). If destruct is not set, the packet data |
|
* is typically backed by some static buffer somewhere and is only valid for a |
|
* limited time (e.g. until the next read call when demuxing). |
|
* |
|
* The side data is always allocated with av_malloc() and is freed in |
|
* av_free_packet(). |
|
*/ |
|
typedef struct AVPacket { |
|
/** |
|
* 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. |
|
*/ |
|
struct { |
|
uint8_t *data; |
|
int size; |
|
enum AVPacketSideDataType type; |
|
} *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. |
|
*/ |
|
int duration; |
|
void (*destruct)(struct AVPacket *); |
|
void *priv; |
|
int64_t pos; ///< byte position in stream, -1 if unknown |
|
|
|
/** |
|
* Time difference in AVStream->time_base units from the pts of this |
|
* packet to the point at which the output from the decoder has converged |
|
* independent from the availability of previous frames. That is, the |
|
* frames are virtually identical no matter if decoding started from |
|
* the very first frame or from this keyframe. |
|
* Is AV_NOPTS_VALUE if unknown. |
|
* This field is not the display duration of the current packet. |
|
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY |
|
* set. |
|
* |
|
* The purpose of this field is to allow seeking in streams that have no |
|
* keyframes in the conventional sense. It corresponds to the |
|
* recovery point SEI in H.264 and match_time_delta in NUT. It is also |
|
* essential for some types of subtitle streams to ensure that all |
|
* subtitles are correctly displayed after seeking. |
|
*/ |
|
int64_t convergence_duration; |
|
} AVPacket; |
|
#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe |
|
#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted |
|
|
|
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, |
|
}; |
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* This structure describes decoded (raw) audio or video data. |
|
* |
|
* AVFrame must be allocated using avcodec_alloc_frame() and freed with |
|
* avcodec_free_frame(). Note that this allocates only the AVFrame itself. The |
|
* buffers for the data must be managed through other means. |
|
* |
|
* AVFrame is typically allocated once and then reused multiple times to hold |
|
* different data (e.g. a single AVFrame to hold frames received from a |
|
* decoder). In such a case, avcodec_get_frame_defaults() should be used to |
|
* reset the frame to its original clean state before it is reused again. |
|
* |
|
* sizeof(AVFrame) is not a part of the public ABI, so new fields may be added |
|
* to the end with a minor bump. |
|
* Similarly fields that are marked as to be only accessed by |
|
* av_opt_ptr() can be reordered. This allows 2 forks to add fields |
|
* without breaking compatibility with each other. |
|
*/ |
|
typedef struct AVFrame { |
|
#define AV_NUM_DATA_POINTERS 8 |
|
/** |
|
* pointer to the picture/channel planes. |
|
* This might be different from the first allocated byte |
|
* - encoding: Set by user |
|
* - decoding: set by AVCodecContext.get_buffer() |
|
*/ |
|
uint8_t *data[AV_NUM_DATA_POINTERS]; |
|
|
|
/** |
|
* Size, in bytes, of the data for each picture/channel plane. |
|
* |
|
* For audio, only linesize[0] may be set. For planar audio, each channel |
|
* plane must be the same size. |
|
* |
|
* - encoding: Set by user |
|
* - decoding: set by AVCodecContext.get_buffer() |
|
*/ |
|
int linesize[AV_NUM_DATA_POINTERS]; |
|
|
|
/** |
|
* pointers to the data planes/channels. |
|
* |
|
* For video, this should simply point to data[]. |
|
* |
|
* For planar audio, each channel has a separate data pointer, and |
|
* linesize[0] contains the size of each channel buffer. |
|
* For packed audio, there is just one data pointer, and linesize[0] |
|
* contains the total size of the buffer for all channels. |
|
* |
|
* Note: Both data and extended_data will always be set by get_buffer(), |
|
* but for planar audio with more channels that can fit in data, |
|
* extended_data must be used by the decoder in order to access all |
|
* channels. |
|
* |
|
* encoding: set by user |
|
* decoding: set by AVCodecContext.get_buffer() |
|
*/ |
|
uint8_t **extended_data; |
|
|
|
/** |
|
* width and height of the video frame |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int width, height; |
|
|
|
/** |
|
* number of audio samples (per channel) described by this frame |
|
* - encoding: Set by user |
|
* - decoding: Set by libavcodec |
|
*/ |
|
int nb_samples; |
|
|
|
/** |
|
* format of the frame, -1 if unknown or unset |
|
* Values correspond to enum AVPixelFormat for video frames, |
|
* enum AVSampleFormat for audio) |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int format; |
|
|
|
/** |
|
* 1 -> keyframe, 0-> not |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int key_frame; |
|
|
|
/** |
|
* Picture type of the frame, see ?_TYPE below. |
|
* - encoding: Set by libavcodec. for coded_picture (and set by user for input). |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
enum AVPictureType pict_type; |
|
|
|
/** |
|
* pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer. |
|
* This isn't used by libavcodec unless the default get/release_buffer() is used. |
|
* - encoding: |
|
* - decoding: |
|
*/ |
|
uint8_t *base[AV_NUM_DATA_POINTERS]; |
|
|
|
/** |
|
* sample aspect ratio for the video frame, 0/1 if unknown/unspecified |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
AVRational sample_aspect_ratio; |
|
|
|
/** |
|
* presentation timestamp in time_base units (time when frame should be shown to user) |
|
* If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed. |
|
* - encoding: MUST be set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int64_t pts; |
|
|
|
/** |
|
* pts copied from the AVPacket that was decoded to produce this frame |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t pkt_pts; |
|
|
|
/** |
|
* dts copied from the AVPacket that triggered returning this frame |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t pkt_dts; |
|
|
|
/** |
|
* picture number in bitstream order |
|
* - encoding: set by |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int coded_picture_number; |
|
/** |
|
* picture number in display order |
|
* - encoding: set by |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int display_picture_number; |
|
|
|
/** |
|
* quality (between 1 (good) and FF_LAMBDA_MAX (bad)) |
|
* - encoding: Set by libavcodec. for coded_picture (and set by user for input). |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int quality; |
|
|
|
/** |
|
* is this picture used as reference |
|
* The values for this are the same as the MpegEncContext.picture_structure |
|
* variable, that is 1->top field, 2->bottom field, 3->frame/both fields. |
|
* Set to 4 for delayed, non-reference frames. |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. (before get_buffer() call)). |
|
*/ |
|
int reference; |
|
|
|
/** |
|
* QP table |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int8_t *qscale_table; |
|
/** |
|
* QP store stride |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int qstride; |
|
|
|
/** |
|
* |
|
*/ |
|
int qscale_type; |
|
|
|
/** |
|
* mbskip_table[mb]>=1 if MB didn't change |
|
* stride= mb_width = (width+15)>>4 |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
uint8_t *mbskip_table; |
|
|
|
/** |
|
* motion vector table |
|
* @code |
|
* example: |
|
* int mv_sample_log2= 4 - motion_subsample_log2; |
|
* int mb_width= (width+15)>>4; |
|
* int mv_stride= (mb_width << mv_sample_log2) + 1; |
|
* motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y]; |
|
* @endcode |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int16_t (*motion_val[2])[2]; |
|
|
|
/** |
|
* macroblock type table |
|
* mb_type_base + mb_width + 2 |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
uint32_t *mb_type; |
|
|
|
/** |
|
* DCT coefficients |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
short *dct_coeff; |
|
|
|
/** |
|
* motion reference frame index |
|
* the order in which these are stored can depend on the codec. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int8_t *ref_index[2]; |
|
|
|
/** |
|
* for some private data of the user |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
void *opaque; |
|
|
|
/** |
|
* error |
|
* - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR. |
|
* - decoding: unused |
|
*/ |
|
uint64_t error[AV_NUM_DATA_POINTERS]; |
|
|
|
/** |
|
* type of the buffer (to keep track of who has to deallocate data[*]) |
|
* - encoding: Set by the one who allocates it. |
|
* - decoding: Set by the one who allocates it. |
|
* Note: User allocated (direct rendering) & internal buffers cannot coexist currently. |
|
*/ |
|
int type; |
|
|
|
/** |
|
* When decoding, this signals how much the picture must be delayed. |
|
* extra_delay = repeat_pict / (2*fps) |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int repeat_pict; |
|
|
|
/** |
|
* The content of the picture is interlaced. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. (default 0) |
|
*/ |
|
int interlaced_frame; |
|
|
|
/** |
|
* If the content is interlaced, is top field displayed first. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int top_field_first; |
|
|
|
/** |
|
* Tell user application that palette has changed from previous frame. |
|
* - encoding: ??? (no palette-enabled encoder yet) |
|
* - decoding: Set by libavcodec. (default 0). |
|
*/ |
|
int palette_has_changed; |
|
|
|
/** |
|
* codec suggestion on buffer type if != 0 |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. (before get_buffer() call)). |
|
*/ |
|
int buffer_hints; |
|
|
|
/** |
|
* Pan scan. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
AVPanScan *pan_scan; |
|
|
|
/** |
|
* reordered opaque 64bit (generally an integer or a double precision float |
|
* PTS but can be anything). |
|
* The user sets AVCodecContext.reordered_opaque to represent the input at |
|
* that time, |
|
* the decoder reorders values as needed and sets AVFrame.reordered_opaque |
|
* to exactly one of the values provided by the user through AVCodecContext.reordered_opaque |
|
* @deprecated in favor of pkt_pts |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t reordered_opaque; |
|
|
|
/** |
|
* hardware accelerator private data (FFmpeg-allocated) |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec |
|
*/ |
|
void *hwaccel_picture_private; |
|
|
|
/** |
|
* the AVCodecContext which ff_thread_get_buffer() was last called on |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
struct AVCodecContext *owner; |
|
|
|
/** |
|
* used by multithreading to store frame-specific info |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
void *thread_opaque; |
|
|
|
/** |
|
* log2 of the size of the block which a single vector in motion_val represents: |
|
* (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2) |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
uint8_t motion_subsample_log2; |
|
|
|
/** |
|
* Sample rate of the audio data. |
|
* |
|
* - encoding: unused |
|
* - decoding: read by user |
|
*/ |
|
int sample_rate; |
|
|
|
/** |
|
* Channel layout of the audio data. |
|
* |
|
* - encoding: unused |
|
* - decoding: read by user. |
|
*/ |
|
uint64_t channel_layout; |
|
|
|
/** |
|
* frame timestamp estimated using various heuristics, in stream time base |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_best_effort_timestamp(frame) |
|
* - encoding: unused |
|
* - decoding: set by libavcodec, read by user. |
|
*/ |
|
int64_t best_effort_timestamp; |
|
|
|
/** |
|
* reordered pos from the last AVPacket that has been input into the decoder |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_pkt_pos(frame) |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t pkt_pos; |
|
|
|
/** |
|
* duration of the corresponding packet, expressed in |
|
* AVStream->time_base units, 0 if unknown. |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_pkt_duration(frame) |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t pkt_duration; |
|
|
|
/** |
|
* metadata. |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_metadata(frame) |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
AVDictionary *metadata; |
|
|
|
/** |
|
* decode error flags of the frame, set to a combination of |
|
* FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there |
|
* were errors during the decoding. |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_decode_error_flags(frame) |
|
* - encoding: unused |
|
* - decoding: set by libavcodec, read by user. |
|
*/ |
|
int decode_error_flags; |
|
#define FF_DECODE_ERROR_INVALID_BITSTREAM 1 |
|
#define FF_DECODE_ERROR_MISSING_REFERENCE 2 |
|
|
|
/** |
|
* number of audio channels, only used for audio. |
|
* Code outside libavcodec should access this field using: |
|
* av_frame_get_channels(frame) |
|
* - encoding: unused |
|
* - decoding: Read by user. |
|
*/ |
|
int64_t channels; |
|
|
|
/** |
|
* size of the corresponding packet containing the compressed |
|
* frame. It must be accessed using av_frame_get_pkt_size() and |
|
* av_frame_set_pkt_size(). |
|
* It is set to a negative value if unknown. |
|
* - encoding: unused |
|
* - decoding: set by libavcodec, read by user. |
|
*/ |
|
int pkt_size; |
|
} AVFrame; |
|
|
|
/** |
|
* Accessors for some AVFrame fields. |
|
* The position of these field in the structure is not part of the ABI, |
|
* they should not be accessed directly outside libavcodec. |
|
*/ |
|
int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame); |
|
void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val); |
|
int64_t av_frame_get_pkt_duration (const AVFrame *frame); |
|
void av_frame_set_pkt_duration (AVFrame *frame, int64_t val); |
|
int64_t av_frame_get_pkt_pos (const AVFrame *frame); |
|
void av_frame_set_pkt_pos (AVFrame *frame, int64_t val); |
|
int64_t av_frame_get_channel_layout (const AVFrame *frame); |
|
void av_frame_set_channel_layout (AVFrame *frame, int64_t val); |
|
int av_frame_get_channels (const AVFrame *frame); |
|
void av_frame_set_channels (AVFrame *frame, int val); |
|
int av_frame_get_sample_rate (const AVFrame *frame); |
|
void av_frame_set_sample_rate (AVFrame *frame, int val); |
|
AVDictionary *av_frame_get_metadata (const AVFrame *frame); |
|
void av_frame_set_metadata (AVFrame *frame, AVDictionary *val); |
|
int av_frame_get_decode_error_flags (const AVFrame *frame); |
|
void av_frame_set_decode_error_flags (AVFrame *frame, int val); |
|
int av_frame_get_pkt_size(const AVFrame *frame); |
|
void av_frame_set_pkt_size(AVFrame *frame, int val); |
|
|
|
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. |
|
* Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user |
|
* applications. |
|
* 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; |
|
char codec_name[32]; |
|
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; |
|
|
|
/** |
|
* fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). |
|
* This is used to work around some encoder bugs. |
|
* - encoding: unused |
|
* - decoding: Set by user, will be converted to uppercase by libavcodec during init. |
|
*/ |
|
unsigned int stream_codec_tag; |
|
|
|
#if FF_API_SUB_ID |
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated int sub_id; |
|
#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 libavcodec. 0 or some bitrate if this info is available in the stream. |
|
*/ |
|
int 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 |
|
|
|
/** |
|
* CODEC_FLAG_*. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int flags; |
|
|
|
/** |
|
* 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 |
|
* mpeg4: global headers (they can be in the bitstream or here) |
|
* The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger |
|
* than extradata_size to avoid prolems 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. |
|
* - encoding: MUST be set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
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 is the number of "priming" samples added to the |
|
* beginning of the stream. The decoded output will be delayed by this |
|
* many samples relative to the input to the encoder. Note that this |
|
* field is purely informational and does not directly affect the pts |
|
* output by the encoder, which should always be based on the actual |
|
* presentation time, including any delay. |
|
* 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. |
|
* - encoding: MUST be set by user. |
|
* - decoding: Set by libavcodec. |
|
* Note: For compatibility it is possible to set this instead of |
|
* coded_width/height before decoding. |
|
*/ |
|
int width, height; |
|
|
|
/** |
|
* Bitstream width / height, may be different from width/height if lowres enabled. |
|
* - encoding: unused |
|
* - decoding: Set by user before init if known. Codec should override / dynamically change if needed. |
|
*/ |
|
int coded_width, coded_height; |
|
|
|
#define FF_ASPECT_EXTENDED 15 |
|
|
|
/** |
|
* 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. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user if known, overridden by libavcodec if known |
|
*/ |
|
enum AVPixelFormat pix_fmt; |
|
|
|
/** |
|
* Motion estimation algorithm used for video coding. |
|
* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), |
|
* 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific] |
|
* - encoding: MUST be set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_method; |
|
|
|
/** |
|
* 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. |
|
* @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; |
|
|
|
/** obsolete FIXME remove */ |
|
int rc_strategy; |
|
#define FF_RC_STRATEGY_XVID 1 |
|
|
|
int b_frame_strategy; |
|
|
|
#if FF_API_MPV_GLOBAL_OPTS |
|
/** |
|
* luma single coefficient elimination threshold |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
attribute_deprecated int luma_elim_threshold; |
|
|
|
/** |
|
* chroma single coeff elimination threshold |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
attribute_deprecated int chroma_elim_threshold; |
|
#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; |
|
|
|
/** |
|
* 0-> h263 quant 1-> mpeg quant |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mpeg_quant; |
|
|
|
/** |
|
* 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; |
|
/** |
|
* prediction method (needed for huffyuv) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int prediction_method; |
|
#define FF_PRED_LEFT 0 |
|
#define FF_PRED_PLANE 1 |
|
#define FF_PRED_MEDIAN 2 |
|
|
|
/** |
|
* 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_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; |
|
|
|
/** |
|
* prepass for motion estimation |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int pre_me; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* 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. |
|
*/ |
|
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 |
|
|
|
/** |
|
* maximum motion estimation search range in subpel units |
|
* If 0 then no limit. |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_range; |
|
|
|
/** |
|
* intra quantizer bias |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int intra_quant_bias; |
|
#define FF_DEFAULT_QUANT_BIAS 999999 |
|
|
|
/** |
|
* inter quantizer bias |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int inter_quant_bias; |
|
|
|
#if FF_API_COLOR_TABLE_ID |
|
/** |
|
* color table ID |
|
* - encoding: unused |
|
* - decoding: Which clrtable should be used for 8bit RGB images. |
|
* Tables have to be stored somewhere. FIXME |
|
*/ |
|
attribute_deprecated int color_table_id; |
|
#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 (MPEG2 field pics) |
|
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) |
|
|
|
/** |
|
* XVideo Motion Acceleration |
|
* - encoding: forbidden |
|
* - decoding: set by decoder |
|
*/ |
|
int xvmc_acceleration; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* scene change detection threshold |
|
* 0 is default, larger means fewer detected scene changes. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int scenechange_threshold; |
|
|
|
/** |
|
* noise reduction strength |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int noise_reduction; |
|
|
|
#if FF_API_INTER_THRESHOLD |
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated int inter_threshold; |
|
#endif |
|
|
|
#if FF_API_MPV_GLOBAL_OPTS |
|
/** |
|
* @deprecated use mpegvideo private options instead |
|
*/ |
|
attribute_deprecated int quantizer_noise_shaping; |
|
#endif |
|
|
|
/** |
|
* Motion estimation threshold below which no motion estimation is |
|
* performed, but instead the user specified motion vectors are used. |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_threshold; |
|
|
|
/** |
|
* Macroblock threshold below which the user specified macroblock types will be used. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_threshold; |
|
|
|
/** |
|
* precision of the intra DC coefficient - 8 |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
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; |
|
|
|
/** |
|
* Border processing masking, raises the quantizer for mbs on the borders |
|
* of the picture. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float border_masking; |
|
|
|
/** |
|
* minimum MB lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_lmin; |
|
|
|
/** |
|
* maximum MB lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mb_lmax; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_penalty_compensation; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int bidir_refine; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int brd_scale; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* chroma qp offset from luma |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int chromaoffset; |
|
|
|
/** |
|
* Multiplied by qscale for each frame and added to scene_change_score. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int scenechange_factor; |
|
|
|
/** |
|
* |
|
* Note: Value depends upon the compare function used for fullpel ME. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mv0_threshold; |
|
|
|
/** |
|
* Adjust sensitivity of b_frame_strategy 1. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int b_sensitivity; |
|
|
|
/** |
|
* 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 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; |
|
|
|
#if FF_API_REQUEST_CHANNELS |
|
/** |
|
* Decoder should decode to this many channels if it can (0 for default) |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
* @deprecated Deprecated in favor of request_channel_layout. |
|
*/ |
|
int request_channels; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* Called at the beginning of each frame to get a buffer for it. |
|
* |
|
* The function will set AVFrame.data[], AVFrame.linesize[]. |
|
* AVFrame.extended_data[] must also be set, but it should be the same as |
|
* AVFrame.data[] except for planar audio with more channels than can fit |
|
* in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as |
|
* many data pointers as it can hold. |
|
* |
|
* if CODEC_CAP_DR1 is not set then get_buffer() must call |
|
* avcodec_default_get_buffer() instead of providing buffers allocated by |
|
* some other means. |
|
* |
|
* AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't |
|
* need it. avcodec_default_get_buffer() aligns the output buffer properly, |
|
* but if get_buffer() is overridden then alignment considerations should |
|
* be taken into account. |
|
* |
|
* @see avcodec_default_get_buffer() |
|
* |
|
* Video: |
|
* |
|
* If pic.reference is set then the frame will be read 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. |
|
* |
|
* If frame multithreading is used and thread_safe_callbacks is set, |
|
* it may be called from a different thread, but not from more than one at |
|
* once. Does not need to be reentrant. |
|
* |
|
* @see release_buffer(), reget_buffer() |
|
* @see avcodec_align_dimensions2() |
|
* |
|
* Audio: |
|
* |
|
* Decoders request a buffer of a particular size by setting |
|
* AVFrame.nb_samples prior to calling get_buffer(). The decoder may, |
|
* however, utilize only part of the buffer by setting AVFrame.nb_samples |
|
* to a smaller value in the output frame. |
|
* |
|
* Decoders cannot use the buffer after returning from |
|
* avcodec_decode_audio4(), so they will not call release_buffer(), as it |
|
* is assumed to be released immediately upon return. In some rare cases, |
|
* a decoder may need to call get_buffer() more than once in a single |
|
* call to avcodec_decode_audio4(). In that case, when get_buffer() is |
|
* called again after it has already been called once, the previously |
|
* acquired buffer is assumed to be released at that time and may not be |
|
* reused by the decoder. |
|
* |
|
* As a convenience, av_samples_get_buffer_size() and |
|
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer() |
|
* 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_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
/** |
|
* Called to release buffers which were allocated with get_buffer. |
|
* A released buffer can be reused in get_buffer(). |
|
* pic.data[*] must be set to NULL. |
|
* May be called from a different thread if frame multithreading is used, |
|
* but not by more than one thread at once, so does not need to be reentrant. |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec, user can override. |
|
*/ |
|
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
/** |
|
* Called at the beginning of a frame to get cr buffer for it. |
|
* Buffer type (size, hints) must be the same. libavcodec won't check it. |
|
* libavcodec will pass previous buffer in pic, function should return |
|
* same buffer or new buffer with old frame "painted" into it. |
|
* If pic.data[0] == NULL must behave like get_buffer(). |
|
* if CODEC_CAP_DR1 is not set then reget_buffer() must call |
|
* avcodec_default_reget_buffer() instead of providing buffers allocated by |
|
* some other means. |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec, user can override. |
|
*/ |
|
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
|
|
/* - 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; |
|
|
|
/** |
|
* ratecontrol qmin qmax limiting method |
|
* 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float rc_qsquish; |
|
|
|
float rc_qmod_amp; |
|
int rc_qmod_freq; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* rate control equation |
|
* - encoding: Set by user |
|
* - decoding: unused |
|
*/ |
|
const char *rc_eq; |
|
|
|
/** |
|
* maximum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_max_rate; |
|
|
|
/** |
|
* minimum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_min_rate; |
|
|
|
float rc_buffer_aggressivity; |
|
|
|
/** |
|
* initial complexity for pass1 ratecontrol |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float rc_initial_cplx; |
|
|
|
/** |
|
* 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; |
|
|
|
#define FF_CODER_TYPE_VLC 0 |
|
#define FF_CODER_TYPE_AC 1 |
|
#define FF_CODER_TYPE_RAW 2 |
|
#define FF_CODER_TYPE_RLE 3 |
|
#define FF_CODER_TYPE_DEFLATE 4 |
|
/** |
|
* coder type |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int coder_type; |
|
|
|
/** |
|
* context model |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int context_model; |
|
|
|
/** |
|
* minimum Lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int lmin; |
|
|
|
/** |
|
* maximum Lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int lmax; |
|
|
|
/** |
|
* frame skip threshold |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int frame_skip_threshold; |
|
|
|
/** |
|
* frame skip factor |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int frame_skip_factor; |
|
|
|
/** |
|
* frame skip exponent |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int frame_skip_exp; |
|
|
|
/** |
|
* frame skip comparison function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int frame_skip_cmp; |
|
|
|
/** |
|
* trellis RD quantization |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int trellis; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int min_prediction_order; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int max_prediction_order; |
|
|
|
/** |
|
* GOP timecode frame start number |
|
* - encoding: Set by user, in non drop frame format |
|
* - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset) |
|
*/ |
|
int64_t timecode_frame_start; |
|
|
|
/* 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. */ |
|
void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); |
|
|
|
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. */ |
|
|
|
/* statistics, used for 2-pass encoding */ |
|
int mv_bits; |
|
int header_bits; |
|
int i_tex_bits; |
|
int p_tex_bits; |
|
int i_count; |
|
int p_count; |
|
int skip_count; |
|
int misc_bits; |
|
|
|
/** |
|
* number of bits used for the previously encoded frame |
|
* - encoding: Set by libavcodec. |
|
* - decoding: unused |
|
*/ |
|
int frame_bits; |
|
|
|
/** |
|
* 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 |
|
#define FF_BUG_OLD_MSMPEG4 2 |
|
#define FF_BUG_XVID_ILACE 4 |
|
#define FF_BUG_UMP4 8 |
|
#define FF_BUG_NO_PADDING 16 |
|
#define FF_BUG_AMV 32 |
|
#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
|
#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 |
|
|
|
/** |
|
* strictly follow the standard (MPEG4, ...). |
|
* - 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 |
|
|
|
/** |
|
* 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 |
|
#define FF_DEBUG_MV 32 |
|
#define FF_DEBUG_DCT_COEFF 0x00000040 |
|
#define FF_DEBUG_SKIP 0x00000080 |
|
#define FF_DEBUG_STARTCODE 0x00000100 |
|
#define FF_DEBUG_PTS 0x00000200 |
|
#define FF_DEBUG_ER 0x00000400 |
|
#define FF_DEBUG_MMCO 0x00000800 |
|
#define FF_DEBUG_BUGS 0x00001000 |
|
#define FF_DEBUG_VIS_QP 0x00002000 |
|
#define FF_DEBUG_VIS_MB_TYPE 0x00004000 |
|
#define FF_DEBUG_BUFFERS 0x00008000 |
|
#define FF_DEBUG_THREADS 0x00010000 |
|
|
|
/** |
|
* 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 |
|
|
|
/** |
|
* Error recognition; may misdetect some more or less valid parts as errors. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int err_recognition; |
|
#define AV_EF_CRCCHECK (1<<0) |
|
#define AV_EF_BITSTREAM (1<<1) |
|
#define AV_EF_BUFFER (1<<2) |
|
#define AV_EF_EXPLODE (1<<3) |
|
|
|
#define AV_EF_CAREFUL (1<<16) |
|
#define AV_EF_COMPLIANT (1<<17) |
|
#define AV_EF_AGGRESSIVE (1<<18) |
|
|
|
|
|
/** |
|
* opaque 64bit number (generally a PTS) that will be reordered and |
|
* output in AVFrame.reordered_opaque |
|
* @deprecated in favor of pkt_pts |
|
* - 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&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_LIBMPEG2MMX 4 |
|
#if FF_API_MMI |
|
#define FF_IDCT_MMI 5 |
|
#endif |
|
#define FF_IDCT_ARM 7 |
|
#define FF_IDCT_ALTIVEC 8 |
|
#define FF_IDCT_SH4 9 |
|
#define FF_IDCT_SIMPLEARM 10 |
|
#define FF_IDCT_H264 11 |
|
#define FF_IDCT_VP3 12 |
|
#define FF_IDCT_IPP 13 |
|
#define FF_IDCT_XVIDMMX 14 |
|
#define FF_IDCT_CAVS 15 |
|
#define FF_IDCT_SIMPLEARMV5TE 16 |
|
#define FF_IDCT_SIMPLEARMV6 17 |
|
#define FF_IDCT_SIMPLEVIS 18 |
|
#define FF_IDCT_WMV2 19 |
|
#define FF_IDCT_FAAN 20 |
|
#define FF_IDCT_EA 21 |
|
#define FF_IDCT_SIMPLENEON 22 |
|
#define FF_IDCT_SIMPLEALPHA 23 |
|
#define FF_IDCT_BINK 24 |
|
|
|
#if FF_API_DSP_MASK |
|
/** |
|
* Unused. |
|
* @deprecated use av_set_cpu_flags_mask() instead. |
|
*/ |
|
attribute_deprecated unsigned dsp_mask; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int lowres; |
|
|
|
/** |
|
* the picture in the bitstream |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
AVFrame *coded_frame; |
|
|
|
/** |
|
* 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); |
|
|
|
/** |
|
* thread opaque |
|
* Can be used by execute() to store some per AVCodecContext stuff. |
|
* - encoding: set by execute() |
|
* - decoding: set by execute() |
|
*/ |
|
void *thread_opaque; |
|
|
|
/** |
|
* noise vs. sse weight for the nsse comparsion 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_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_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_HIGH_422 122 |
|
#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) |
|
#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 |
|
|
|
/** |
|
* level |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int level; |
|
#define FF_LEVEL_UNKNOWN -99 |
|
|
|
/** |
|
* |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVDiscard skip_loop_filter; |
|
|
|
/** |
|
* |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
enum AVDiscard skip_idct; |
|
|
|
/** |
|
* |
|
* - 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; |
|
|
|
/** |
|
* Simulates errors in the bitstream to test error concealment. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int error_rate; |
|
|
|
/** |
|
* Current packet as passed into the decoder, to avoid having |
|
* to pass the packet into every function. Currently only valid |
|
* inside lavc and get/release_buffer callbacks. |
|
* - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts |
|
* - encoding: unused |
|
*/ |
|
AVPacket *pkt; |
|
|
|
/** |
|
* 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. |
|
*/ |
|
uint64_t vbv_delay; |
|
|
|
/** |
|
* Timebase in which pkt_dts/pts and AVPacket.dts/pts are. |
|
* Code outside libavcodec should access this field using: |
|
* avcodec_set_pkt_timebase(avctx) |
|
* - encoding unused. |
|
* - decodimg set by user |
|
*/ |
|
AVRational pkt_timebase; |
|
|
|
/** |
|
* AVCodecDescriptor |
|
* Code outside libavcodec should access this field using: |
|
* avcodec_get_codec_descriptior(avctx) |
|
* - encoding: unused. |
|
* - decoding: set by libavcodec. |
|
*/ |
|
const AVCodecDescriptor *codec_descriptor; |
|
|
|
/** |
|
* 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 |
|
|
|
/** |
|
* Current frame metadata. |
|
* - decoding: maintained and used by libavcodec, not intended to be used by user apps |
|
* - encoding: unused |
|
*/ |
|
AVDictionary *metadata; |
|
} 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); |
|
|
|
/** |
|
* 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 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 *); |
|
/** |
|
* Flush buffers. |
|
* Will be called when seeking |
|
*/ |
|
void (*flush)(AVCodecContext *); |
|
} AVCodec; |
|
|
|
/** |
|
* 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 FF_HWACCEL_CODEC_CAP_* |
|
*/ |
|
int capabilities; |
|
|
|
struct AVHWAccel *next; |
|
|
|
/** |
|
* 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. |
|
* |
|
* @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 HW accelerator private data. |
|
* |
|
* Private data is allocated with av_mallocz() before |
|
* AVCodecContext.get_buffer() and deallocated after |
|
* AVCodecContext.release_buffer(). |
|
*/ |
|
int priv_data_size; |
|
} AVHWAccel; |
|
|
|
/** |
|
* @defgroup lavc_picture AVPicture |
|
* |
|
* Functions for working with AVPicture |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* four components are given, that's all. |
|
* the last component is alpha |
|
*/ |
|
typedef struct AVPicture { |
|
uint8_t *data[AV_NUM_DATA_POINTERS]; |
|
int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line |
|
} AVPicture; |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
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 |
|
|
|
/** |
|
* data+linesize for the bitmap of this subtitle. |
|
* can be set for text/ass as well once they where rendered |
|
*/ |
|
AVPicture pict; |
|
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; |
|
|
|
/** |
|
* 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); |
|
|
|
|
|
#if FF_API_ALLOC_CONTEXT |
|
/** |
|
* Allocate an AVCodecContext and set its fields to default values. The |
|
* resulting struct can be deallocated by simply calling av_free(). |
|
* |
|
* @return An AVCodecContext filled with default values or NULL on failure. |
|
* @see avcodec_get_context_defaults |
|
* |
|
* @deprecated use avcodec_alloc_context3() |
|
*/ |
|
attribute_deprecated |
|
AVCodecContext *avcodec_alloc_context(void); |
|
|
|
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! |
|
* we WILL change its arguments and name a few times! */ |
|
attribute_deprecated |
|
AVCodecContext *avcodec_alloc_context2(enum AVMediaType); |
|
|
|
/** |
|
* Set the fields of the given AVCodecContext to default values. |
|
* |
|
* @param s The AVCodecContext of which the fields should be set to default values. |
|
* @deprecated use avcodec_get_context_defaults3 |
|
*/ |
|
attribute_deprecated |
|
void avcodec_get_context_defaults(AVCodecContext *s); |
|
|
|
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! |
|
* we WILL change its arguments and name a few times! */ |
|
attribute_deprecated |
|
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType); |
|
#endif |
|
|
|
/** |
|
* Allocate an AVCodecContext and set its fields to default values. The |
|
* resulting struct can be deallocated by calling avcodec_close() on it followed |
|
* by av_free(). |
|
* |
|
* @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. |
|
* @see avcodec_get_context_defaults |
|
*/ |
|
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); |
|
|
|
/** |
|
* Set the fields of the given AVCodecContext to default values corresponding |
|
* to the given codec (defaults may be codec-dependent). |
|
* |
|
* Do not call this function if a non-NULL codec has been passed |
|
* to avcodec_alloc_context3() that allocated this AVCodecContext. |
|
* If codec is non-NULL, it is illegal to call avcodec_open2() with a |
|
* different codec on this AVCodecContext. |
|
*/ |
|
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); |
|
|
|
/** |
|
* 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); |
|
|
|
/** |
|
* 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(), but otherwise uninitialized |
|
* @param src source codec context |
|
* @return AVERROR() on error (e.g. memory allocation error), 0 on success |
|
*/ |
|
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); |
|
|
|
/** |
|
* Allocate an AVFrame and set its fields to default values. The resulting |
|
* struct must be freed using avcodec_free_frame(). |
|
* |
|
* @return An AVFrame filled with default values or NULL on failure. |
|
* @see avcodec_get_frame_defaults |
|
*/ |
|
AVFrame *avcodec_alloc_frame(void); |
|
|
|
/** |
|
* Set the fields of the given AVFrame to default values. |
|
* |
|
* @param frame The AVFrame of which the fields should be set to default values. |
|
*/ |
|
void avcodec_get_frame_defaults(AVFrame *frame); |
|
|
|
/** |
|
* Free the frame and any dynamically allocated objects in it, |
|
* e.g. extended_data. |
|
* |
|
* @param frame frame to be freed. The pointer will be set to NULL. |
|
* |
|
* @warning this function does NOT free the data buffers themselves |
|
* (it does not know how, since they might have been allocated with |
|
* a custom get_buffer()). |
|
*/ |
|
void avcodec_free_frame(AVFrame **frame); |
|
|
|
#if FF_API_AVCODEC_OPEN |
|
/** |
|
* Initialize the AVCodecContext to use the given AVCodec. Prior to using this |
|
* function the context has to be allocated. |
|
* |
|
* 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! |
|
* |
|
* @code |
|
* avcodec_register_all(); |
|
* codec = avcodec_find_decoder(AV_CODEC_ID_H264); |
|
* if (!codec) |
|
* exit(1); |
|
* |
|
* context = avcodec_alloc_context3(codec); |
|
* |
|
* if (avcodec_open(context, codec) < 0) |
|
* exit(1); |
|
* @endcode |
|
* |
|
* @param avctx The context which will be set up to use the given codec. |
|
* @param codec The codec to use within the context. |
|
* @return zero on success, a negative value on error |
|
* @see avcodec_alloc_context3, avcodec_find_decoder, avcodec_find_encoder, avcodec_close |
|
* |
|
* @deprecated use avcodec_open2 |
|
*/ |
|
attribute_deprecated |
|
int avcodec_open(AVCodecContext *avctx, AVCodec *codec); |
|
#endif |
|
|
|
/** |
|
* 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! |
|
* |
|
* @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 |
|
* avcodec_get_context_defaults3() 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() / |
|
* avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will |
|
* do nothing. |
|
*/ |
|
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 |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Default packet destructor. |
|
*/ |
|
void av_destruct_packet(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); |
|
|
|
/** |
|
* @warning This is a hack - the packet memory allocation stuff is broken. The |
|
* packet is allocated if it was not really allocated. |
|
*/ |
|
int av_dup_packet(AVPacket *pkt); |
|
|
|
/** |
|
* Copy packet, including contents |
|
* |
|
* @return 0 on success, negative AVERROR on fail |
|
*/ |
|
int av_copy_packet(AVPacket *dst, AVPacket *src); |
|
|
|
/** |
|
* Free a packet. |
|
* |
|
* @param pkt packet to free |
|
*/ |
|
void av_free_packet(AVPacket *pkt); |
|
|
|
/** |
|
* 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); |
|
|
|
/** |
|
* 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(AVPacket *pkt, enum AVPacketSideDataType type, |
|
int *size); |
|
|
|
int av_packet_merge_side_data(AVPacket *pkt); |
|
|
|
int av_packet_split_side_data(AVPacket *pkt); |
|
|
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @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); |
|
|
|
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic); |
|
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic); |
|
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic); |
|
|
|
/** |
|
* 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. |
|
*/ |
|
unsigned avcodec_get_edge_width(void); |
|
|
|
/** |
|
* 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 CODEC_CAP_DR1 has been opened. |
|
* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased |
|
* according to avcodec_get_edge_width() before. |
|
*/ |
|
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 CODEC_CAP_DR1 has been opened. |
|
* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased |
|
* according to avcodec_get_edge_width() before. |
|
*/ |
|
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, |
|
int linesize_align[AV_NUM_DATA_POINTERS]); |
|
|
|
#if FF_API_OLD_DECODE_AUDIO |
|
/** |
|
* Wrapper function which calls avcodec_decode_audio4. |
|
* |
|
* @deprecated Use avcodec_decode_audio4 instead. |
|
* |
|
* Decode the audio frame of size avpkt->size from avpkt->data into samples. |
|
* Some decoders may support multiple frames in a single AVPacket, such |
|
* decoders would then just decode the first frame. In this case, |
|
* avcodec_decode_audio3 has to be called again with an AVPacket that contains |
|
* the remaining data in order to decode the second frame etc. |
|
* If no frame |
|
* could be outputted, frame_size_ptr is zero. Otherwise, it is the |
|
* decompressed frame size in bytes. |
|
* |
|
* @warning You must set frame_size_ptr to the allocated size of the |
|
* output buffer before calling avcodec_decode_audio3(). |
|
* |
|
* @warning The input buffer must be FF_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 avpkt->data should be set to 0 to ensure that |
|
* no overreading happens for damaged MPEG streams. |
|
* |
|
* @warning You must not provide a custom get_buffer() when using |
|
* avcodec_decode_audio3(). Doing so will override it with |
|
* avcodec_default_get_buffer. Use avcodec_decode_audio4() instead, |
|
* which does allow the application to provide a custom get_buffer(). |
|
* |
|
* @note You might have to align the input buffer avpkt->data and output buffer |
|
* samples. The alignment requirements depend on the CPU: On some CPUs it isn't |
|
* necessary at all, on others it won't work at all if not aligned and on others |
|
* it will work but it will have an impact on performance. |
|
* |
|
* In practice, avpkt->data should have 4 byte alignment at minimum and |
|
* samples should be 16 byte aligned unless the CPU doesn't need it |
|
* (AltiVec and SSE do). |
|
* |
|
* @note Codecs which have the 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. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] samples the output buffer, sample type in avctx->sample_fmt |
|
* If the sample format is planar, each channel plane will |
|
* be the same size, with no padding between channels. |
|
* @param[in,out] frame_size_ptr the output buffer size in bytes |
|
* @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. |
|
* All decoders are designed to use the least fields possible though. |
|
* @return On error a negative value is returned, otherwise the number of bytes |
|
* used or zero if no frame data was decompressed (used) from the input AVPacket. |
|
*/ |
|
attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, |
|
int *frame_size_ptr, |
|
AVPacket *avpkt); |
|
#endif |
|
|
|
/** |
|
* 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. 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. |
|
* |
|
* @warning The input buffer, avpkt->data must be FF_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 You might have to align the input buffer. The alignment requirements |
|
* depend on the CPU and the decoder. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] frame The AVFrame in which to store decoded audio samples. |
|
* Decoders request a buffer of a particular size by setting |
|
* AVFrame.nb_samples prior to calling get_buffer(). The |
|
* decoder may, however, only utilize part of the buffer by |
|
* setting AVFrame.nb_samples to a smaller value in the |
|
* output frame. |
|
* @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is |
|
* non-zero. |
|
* @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. |
|
*/ |
|
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 FF_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 You might have to align the input buffer avpkt->data. |
|
* The alignment requirements depend on the CPU: on some CPUs it isn't |
|
* necessary at all, on others it won't work at all if not aligned and on others |
|
* it will work but it will have an impact on performance. |
|
* |
|
* In practice, avpkt->data should have 4 byte alignment at minimum. |
|
* |
|
* @note Codecs which have the 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. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] picture The AVFrame in which the decoded video frame will be stored. |
|
* Use avcodec_alloc_frame to get an AVFrame, the codec will |
|
* allocate memory for the actual bitmap. |
|
* with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit. |
|
* with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder |
|
* decodes and the decoder tells the user once it does not need the data anymore, |
|
* the user app can at this point free/reuse/keep the memory as it sees fit. |
|
* |
|
* @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. |
|
*/ |
|
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 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. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] sub The 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); |
|
|
|
/** |
|
* @defgroup lavc_parsing Frame parsing |
|
* @{ |
|
*/ |
|
|
|
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; |
|
|
|
/** |
|
* Time difference in stream time base units from the pts of this |
|
* packet to the point at which the output from the decoder has converged |
|
* independent from the availability of previous frames. That is, the |
|
* frames are virtually identical no matter if decoding started from |
|
* the very first frame or from this keyframe. |
|
* Is AV_NOPTS_VALUE if unknown. |
|
* This field is not the display duration of the current frame. |
|
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY |
|
* set. |
|
* |
|
* The purpose of this field is to allow seeking in streams that have no |
|
* keyframes in the conventional sense. It corresponds to the |
|
* recovery point SEI in H.264 and match_time_delta in NUT. It is also |
|
* essential for some types of subtitle streams to ensure that all |
|
* subtitles are correctly displayed after seeking. |
|
*/ |
|
int64_t convergence_duration; |
|
|
|
// 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; |
|
} AVCodecParserContext; |
|
|
|
typedef struct AVCodecParser { |
|
int codec_ids[5]; /* several codec IDs are permitted */ |
|
int priv_data_size; |
|
int (*parser_init)(AVCodecParserContext *s); |
|
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(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 input length, 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); |
|
|
|
#if FF_API_OLD_ENCODE_AUDIO |
|
/** |
|
* Encode an audio frame from samples into buf. |
|
* |
|
* @deprecated Use avcodec_encode_audio2 instead. |
|
* |
|
* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large. |
|
* However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user |
|
* will know how much space is needed because it depends on the value passed |
|
* in buf_size as described below. In that case a lower value can be used. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] buf the output buffer |
|
* @param[in] buf_size the output buffer size |
|
* @param[in] samples the input buffer containing the samples |
|
* The number of samples read from this buffer is frame_size*channels, |
|
* both of which are defined in avctx. |
|
* For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of |
|
* samples read from samples is equal to: |
|
* buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id)) |
|
* This also implies that av_get_bits_per_sample() must not return 0 for these |
|
* codecs. |
|
* @return On error a negative value is returned, on success zero or the number |
|
* of bytes used to encode the data read from the input buffer. |
|
*/ |
|
int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx, |
|
uint8_t *buf, int buf_size, |
|
const short *samples); |
|
#endif |
|
|
|
/** |
|
* 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_free_packet() (i.e. avpkt->destruct will be |
|
* called to free the user supplied buffer). |
|
* @param[in] frame AVFrame containing the raw audio data to be encoded. |
|
* May be NULL when flushing an encoder that has the |
|
* CODEC_CAP_DELAY capability set. |
|
* If 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 |
|
*/ |
|
int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, |
|
const AVFrame *frame, int *got_packet_ptr); |
|
|
|
#if FF_API_OLD_ENCODE_VIDEO |
|
/** |
|
* @deprecated use avcodec_encode_video2() instead. |
|
* |
|
* Encode a video frame from pict into buf. |
|
* The input picture should be |
|
* stored using a specific format, namely avctx.pix_fmt. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] buf the output buffer for the bitstream of encoded frame |
|
* @param[in] buf_size the size of the output buffer in bytes |
|
* @param[in] pict the input picture to encode |
|
* @return On error a negative value is returned, on success zero or the number |
|
* of bytes used from the output buffer. |
|
*/ |
|
attribute_deprecated |
|
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
|
const AVFrame *pict); |
|
#endif |
|
|
|
/** |
|
* 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_free_packet() (i.e. avpkt->destruct will be |
|
* called to free the user supplied buffer). |
|
* @param[in] frame AVFrame containing the raw video data to be encoded. |
|
* May be NULL when flushing an encoder that has the |
|
* 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 |
|
*/ |
|
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 |
|
|
|
/** |
|
* @addtogroup lavc_picture |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Allocate memory for a picture. Call avpicture_free() to free it. |
|
* |
|
* @see avpicture_fill() |
|
* |
|
* @param picture the picture to be filled in |
|
* @param pix_fmt the format of the picture |
|
* @param width the width of the picture |
|
* @param height the height of the picture |
|
* @return zero if successful, a negative value if not |
|
*/ |
|
int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* Free a picture previously allocated by avpicture_alloc(). |
|
* The data buffer used by the AVPicture is freed, but the AVPicture structure |
|
* itself is not. |
|
* |
|
* @param picture the AVPicture to be freed |
|
*/ |
|
void avpicture_free(AVPicture *picture); |
|
|
|
/** |
|
* Fill in the AVPicture fields, always assume a linesize alignment of |
|
* 1. |
|
* |
|
* @see av_image_fill_arrays() |
|
*/ |
|
int avpicture_fill(AVPicture *picture, const uint8_t *ptr, |
|
enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* Copy pixel data from an AVPicture into a buffer, always assume a |
|
* linesize alignment of 1. |
|
* |
|
* @see av_image_copy_to_buffer() |
|
*/ |
|
int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt, |
|
int width, int height, |
|
unsigned char *dest, int dest_size); |
|
|
|
/** |
|
* Calculate the size in bytes that a picture of the given width and height |
|
* would occupy if stored in the given picture format. |
|
* Always assume a linesize alignment of 1. |
|
* |
|
* @see av_image_get_buffer_size(). |
|
*/ |
|
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* deinterlace - if not supported return -1 |
|
*/ |
|
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, |
|
enum AVPixelFormat pix_fmt, int width, int height); |
|
/** |
|
* Copy image src to dst. Wraps av_image_copy(). |
|
*/ |
|
void av_picture_copy(AVPicture *dst, const AVPicture *src, |
|
enum AVPixelFormat pix_fmt, int width, int height); |
|
|
|
/** |
|
* Crop image top and left side. |
|
*/ |
|
int av_picture_crop(AVPicture *dst, const AVPicture *src, |
|
enum AVPixelFormat pix_fmt, int top_band, int left_band); |
|
|
|
/** |
|
* Pad image. |
|
*/ |
|
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); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @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. |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Utility function to access log2_chroma_w log2_chroma_h from |
|
* the pixel format AVPixFmtDescriptor. |
|
* |
|
* This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample |
|
* for one that returns a failure code and continues in case of invalid |
|
* pix_fmts. |
|
* |
|
* @param[in] pix_fmt the pixel format |
|
* @param[out] h_shift store log2_chroma_h |
|
* @param[out] v_shift store log2_chroma_w |
|
* |
|
* @see av_pix_fmt_get_chroma_sub_sample |
|
*/ |
|
|
|
void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); |
|
|
|
/** |
|
* 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); |
|
|
|
#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */ |
|
#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */ |
|
#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */ |
|
#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */ |
|
#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */ |
|
#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */ |
|
|
|
/** |
|
* Compute what kind of losses will occur when converting from one specific |
|
* pixel format to another. |
|
* 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. These losses can involve loss of chroma, but also loss of |
|
* resolution, loss of color depth, loss due to the color space conversion, loss |
|
* of the alpha bits or loss due to color quantization. |
|
* avcodec_get_fix_fmt_loss() informs you about the various types of losses |
|
* which will occur when converting from one pixel format to another. |
|
* |
|
* @param[in] dst_pix_fmt destination pixel format |
|
* @param[in] src_pix_fmt source pixel format |
|
* @param[in] has_alpha Whether the source pixel format alpha channel is used. |
|
* @return Combination of flags informing you what kind of losses will occur |
|
* (maximum loss for an invalid dst_pix_fmt). |
|
*/ |
|
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, |
|
int has_alpha); |
|
|
|
#if FF_API_FIND_BEST_PIX_FMT |
|
/** |
|
* @deprecated use avcodec_find_best_pix_fmt_of_2() instead. |
|
* |
|
* 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() 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_mask parameter. |
|
* |
|
* Note, only the first 64 pixel formats will fit in pix_fmt_mask. |
|
* |
|
* @code |
|
* src_pix_fmt = AV_PIX_FMT_YUV420P; |
|
* pix_fmt_mask = (1 << AV_PIX_FMT_YUV422P) | (1 << AV_PIX_FMT_RGB24); |
|
* dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss); |
|
* @endcode |
|
* |
|
* @param[in] pix_fmt_mask bitmask determining which pixel format 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. |
|
*/ |
|
attribute_deprecated |
|
enum AVPixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum AVPixelFormat src_pix_fmt, |
|
int has_alpha, int *loss_ptr); |
|
#endif /* FF_API_FIND_BEST_PIX_FMT */ |
|
|
|
/** |
|
* 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(enum AVPixelFormat *pix_fmt_list, |
|
enum AVPixelFormat src_pix_fmt, |
|
int has_alpha, int *loss_ptr); |
|
|
|
/** |
|
* Find the best pixel format to convert to given a certain source pixel |
|
* format and a selection of two destination pixel formats. 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() selects which of |
|
* the given pixel formats should be used to suffer the least amount of loss. |
|
* |
|
* If one of the destination formats is AV_PIX_FMT_NONE the other pixel format (if valid) will be |
|
* returned. |
|
* |
|
* @code |
|
* src_pix_fmt = AV_PIX_FMT_YUV420P; |
|
* dst_pix_fmt1= AV_PIX_FMT_RGB24; |
|
* dst_pix_fmt2= AV_PIX_FMT_GRAY8; |
|
* dst_pix_fmt3= AV_PIX_FMT_RGB8; |
|
* loss= FF_LOSS_CHROMA; // don't care about chroma loss, so chroma loss will be ignored. |
|
* dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss); |
|
* dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt, dst_pix_fmt3, src_pix_fmt, alpha, &loss); |
|
* @endcode |
|
* |
|
* @param[in] dst_pix_fmt1 One of the two destination pixel formats to choose from |
|
* @param[in] dst_pix_fmt2 The other of the two destination 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[in, out] loss_ptr Combination of loss flags. In: selects which of the losses to ignore, i.e. |
|
* NULL or value of zero means we care about all losses. Out: the loss |
|
* that occurs when converting from src to selected dst pixel format. |
|
* @return The best pixel format to convert to or -1 if none was found. |
|
*/ |
|
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 |
|
#if AV_HAVE_INCOMPATIBLE_FORK_ABI |
|
enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list, |
|
enum AVPixelFormat src_pix_fmt, |
|
int has_alpha, int *loss_ptr); |
|
#else |
|
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); |
|
#endif |
|
|
|
|
|
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
|
|
|
/** |
|
* Put a string representing the codec tag codec_tag in buf. |
|
* |
|
* @param buf_size size in bytes of buf |
|
* @return the length of the string that would have been generated if |
|
* enough space had been available, excluding the trailing null |
|
*/ |
|
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); |
|
|
|
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); |
|
|
|
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); |
|
|
|
/** |
|
* Flush buffers, should be called when seeking or when switching to a different stream. |
|
*/ |
|
void avcodec_flush_buffers(AVCodecContext *avctx); |
|
|
|
void avcodec_default_free_buffers(AVCodecContext *s); |
|
|
|
/** |
|
* 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); |
|
|
|
|
|
typedef struct AVBitStreamFilterContext { |
|
void *priv_data; |
|
struct AVBitStreamFilter *filter; |
|
AVCodecParserContext *parser; |
|
struct AVBitStreamFilterContext *next; |
|
} AVBitStreamFilterContext; |
|
|
|
|
|
typedef struct AVBitStreamFilter { |
|
const char *name; |
|
int priv_data_size; |
|
int (*filter)(AVBitStreamFilterContext *bsfc, |
|
AVCodecContext *avctx, const char *args, |
|
uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size, int keyframe); |
|
void (*close)(AVBitStreamFilterContext *bsfc); |
|
struct AVBitStreamFilter *next; |
|
} AVBitStreamFilter; |
|
|
|
void av_register_bitstream_filter(AVBitStreamFilter *bsf); |
|
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); |
|
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); |
|
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); |
|
|
|
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f); |
|
|
|
/* memory */ |
|
|
|
/** |
|
* Reallocate the given block if it is not large enough, otherwise do nothing. |
|
* |
|
* @see av_realloc |
|
*/ |
|
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size); |
|
|
|
/** |
|
* Allocate a buffer, reusing the given one if large enough. |
|
* |
|
* Contrary to av_fast_realloc the current buffer contents might not be |
|
* preserved and on error the old buffer is freed, thus no special |
|
* handling to avoid memleaks is necessary. |
|
* |
|
* @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer |
|
* @param size size of the buffer *ptr points to |
|
* @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and |
|
* *size 0 if an error occurred. |
|
*/ |
|
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size); |
|
|
|
/** |
|
* Same behaviour av_fast_malloc but the buffer has additional |
|
* FF_INPUT_PADDING_SIZE at the end which will 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); |
|
|
|
/** |
|
* 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 verbage will be added to the log |
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* message which tells the user how to report samples to the development |
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* mailing list. |
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*/ |
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void av_log_missing_feature(void *avc, const char *feature, int want_sample); |
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/** |
|
* Log a generic warning message asking for a sample. This function is |
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* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
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* only, and would normally not be used by applications. |
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* @param[in] avc a pointer to an arbitrary struct of which the first field is |
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* a pointer to an AVClass struct |
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* @param[in] msg string containing an optional message, or NULL if no message |
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*/ |
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void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); |
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/** |
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* Register the hardware accelerator hwaccel. |
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*/ |
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void av_register_hwaccel(AVHWAccel *hwaccel); |
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/** |
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* If hwaccel is NULL, returns the first registered hardware accelerator, |
|
* if hwaccel is non-NULL, returns the next registered hardware accelerator |
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* after hwaccel, or NULL if hwaccel is the last one. |
|
*/ |
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AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel); |
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/** |
|
* Lock operation used by lockmgr |
|
*/ |
|
enum AVLockOp { |
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AV_LOCK_CREATE, ///< Create a mutex |
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AV_LOCK_OBTAIN, ///< Lock the mutex |
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AV_LOCK_RELEASE, ///< Unlock the mutex |
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AV_LOCK_DESTROY, ///< Free mutex resources |
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}; |
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|
|
/** |
|
* Register a user provided lock manager supporting the operations |
|
* specified by AVLockOp. mutex points to a (void *) where the |
|
* lockmgr should store/get a pointer to a user allocated mutex. It's |
|
* NULL upon AV_LOCK_CREATE and != NULL for all other ops. |
|
* |
|
* @param cb User defined callback. Note: FFmpeg may invoke calls to this |
|
* callback during the call to av_lockmgr_register(). |
|
* Thus, the application must be prepared to handle that. |
|
* If cb is set to NULL the lockmgr will be unregistered. |
|
* Also note that during unregistration the previously registered |
|
* lockmgr callback may also be invoked. |
|
*/ |
|
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); |
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|
|
/** |
|
* Get the type of the given codec. |
|
*/ |
|
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id); |
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|
|
/** |
|
* Get the name of a codec. |
|
* @return a static string identifying the codec; never NULL |
|
*/ |
|
const char *avcodec_get_name(enum AVCodecID id); |
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|
|
/** |
|
* @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); |
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|
|
/** |
|
* @return a non-zero number if codec is an encoder, zero otherwise |
|
*/ |
|
int av_codec_is_encoder(const AVCodec *codec); |
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|
|
/** |
|
* @return a non-zero number if codec is a decoder, zero otherwise |
|
*/ |
|
int av_codec_is_decoder(const AVCodec *codec); |
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|
|
/** |
|
* @return descriptor for given codec ID or NULL if no descriptor exists. |
|
*/ |
|
const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); |
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|
|
/** |
|
* 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); |
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|
|
/** |
|
* @return codec descriptor with the given name or NULL if no such descriptor |
|
* exists. |
|
*/ |
|
const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#endif /* AVCODEC_AVCODEC_H */
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|