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2989 lines
92 KiB
2989 lines
92 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 FFMPEG_AVCODEC_H |
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#define FFMPEG_AVCODEC_H |
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/** |
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* @file avcodec.h |
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* external API header |
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*/ |
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#include "avutil.h" |
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#include <sys/types.h> /* size_t */ |
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#define AV_STRINGIFY(s) AV_TOSTRING(s) |
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#define AV_TOSTRING(s) #s |
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#define LIBAVCODEC_VERSION_INT ((51<<16)+(50<<8)+0) |
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#define LIBAVCODEC_VERSION 51.50.0 |
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#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT |
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#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION) |
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#define AV_NOPTS_VALUE INT64_C(0x8000000000000000) |
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#define AV_TIME_BASE 1000000 |
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#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE} |
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/** |
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* Identifies 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. it is as close as possible to similar codecs. |
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*/ |
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enum CodecID { |
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CODEC_ID_NONE, |
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CODEC_ID_MPEG1VIDEO, |
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CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding |
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CODEC_ID_MPEG2VIDEO_XVMC, |
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CODEC_ID_H261, |
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CODEC_ID_H263, |
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CODEC_ID_RV10, |
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CODEC_ID_RV20, |
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CODEC_ID_MJPEG, |
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CODEC_ID_MJPEGB, |
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CODEC_ID_LJPEG, |
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CODEC_ID_SP5X, |
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CODEC_ID_JPEGLS, |
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CODEC_ID_MPEG4, |
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CODEC_ID_RAWVIDEO, |
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CODEC_ID_MSMPEG4V1, |
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CODEC_ID_MSMPEG4V2, |
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CODEC_ID_MSMPEG4V3, |
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CODEC_ID_WMV1, |
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CODEC_ID_WMV2, |
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CODEC_ID_H263P, |
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CODEC_ID_H263I, |
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CODEC_ID_FLV1, |
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CODEC_ID_SVQ1, |
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CODEC_ID_SVQ3, |
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CODEC_ID_DVVIDEO, |
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CODEC_ID_HUFFYUV, |
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CODEC_ID_CYUV, |
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CODEC_ID_H264, |
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CODEC_ID_INDEO3, |
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CODEC_ID_VP3, |
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CODEC_ID_THEORA, |
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CODEC_ID_ASV1, |
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CODEC_ID_ASV2, |
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CODEC_ID_FFV1, |
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CODEC_ID_4XM, |
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CODEC_ID_VCR1, |
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CODEC_ID_CLJR, |
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CODEC_ID_MDEC, |
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CODEC_ID_ROQ, |
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CODEC_ID_INTERPLAY_VIDEO, |
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CODEC_ID_XAN_WC3, |
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CODEC_ID_XAN_WC4, |
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CODEC_ID_RPZA, |
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CODEC_ID_CINEPAK, |
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CODEC_ID_WS_VQA, |
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CODEC_ID_MSRLE, |
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CODEC_ID_MSVIDEO1, |
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CODEC_ID_IDCIN, |
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CODEC_ID_8BPS, |
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CODEC_ID_SMC, |
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CODEC_ID_FLIC, |
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CODEC_ID_TRUEMOTION1, |
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CODEC_ID_VMDVIDEO, |
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CODEC_ID_MSZH, |
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CODEC_ID_ZLIB, |
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CODEC_ID_QTRLE, |
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CODEC_ID_SNOW, |
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CODEC_ID_TSCC, |
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CODEC_ID_ULTI, |
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CODEC_ID_QDRAW, |
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CODEC_ID_VIXL, |
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CODEC_ID_QPEG, |
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CODEC_ID_XVID, |
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CODEC_ID_PNG, |
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CODEC_ID_PPM, |
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CODEC_ID_PBM, |
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CODEC_ID_PGM, |
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CODEC_ID_PGMYUV, |
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CODEC_ID_PAM, |
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CODEC_ID_FFVHUFF, |
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CODEC_ID_RV30, |
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CODEC_ID_RV40, |
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CODEC_ID_VC1, |
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CODEC_ID_WMV3, |
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CODEC_ID_LOCO, |
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CODEC_ID_WNV1, |
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CODEC_ID_AASC, |
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CODEC_ID_INDEO2, |
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CODEC_ID_FRAPS, |
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CODEC_ID_TRUEMOTION2, |
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CODEC_ID_BMP, |
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CODEC_ID_CSCD, |
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CODEC_ID_MMVIDEO, |
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CODEC_ID_ZMBV, |
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CODEC_ID_AVS, |
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CODEC_ID_SMACKVIDEO, |
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CODEC_ID_NUV, |
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CODEC_ID_KMVC, |
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CODEC_ID_FLASHSV, |
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CODEC_ID_CAVS, |
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CODEC_ID_JPEG2000, |
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CODEC_ID_VMNC, |
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CODEC_ID_VP5, |
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CODEC_ID_VP6, |
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CODEC_ID_VP6F, |
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CODEC_ID_TARGA, |
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CODEC_ID_DSICINVIDEO, |
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CODEC_ID_TIERTEXSEQVIDEO, |
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CODEC_ID_TIFF, |
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CODEC_ID_GIF, |
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CODEC_ID_FFH264, |
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CODEC_ID_DXA, |
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CODEC_ID_DNXHD, |
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CODEC_ID_THP, |
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CODEC_ID_SGI, |
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CODEC_ID_C93, |
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CODEC_ID_BETHSOFTVID, |
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CODEC_ID_PTX, |
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CODEC_ID_TXD, |
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CODEC_ID_VP6A, |
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CODEC_ID_AMV, |
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CODEC_ID_VB, |
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CODEC_ID_PCX, |
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CODEC_ID_SUNRAST, |
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/* various PCM "codecs" */ |
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CODEC_ID_PCM_S16LE= 0x10000, |
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CODEC_ID_PCM_S16BE, |
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CODEC_ID_PCM_U16LE, |
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CODEC_ID_PCM_U16BE, |
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CODEC_ID_PCM_S8, |
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CODEC_ID_PCM_U8, |
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CODEC_ID_PCM_MULAW, |
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CODEC_ID_PCM_ALAW, |
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CODEC_ID_PCM_S32LE, |
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CODEC_ID_PCM_S32BE, |
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CODEC_ID_PCM_U32LE, |
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CODEC_ID_PCM_U32BE, |
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CODEC_ID_PCM_S24LE, |
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CODEC_ID_PCM_S24BE, |
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CODEC_ID_PCM_U24LE, |
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CODEC_ID_PCM_U24BE, |
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CODEC_ID_PCM_S24DAUD, |
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CODEC_ID_PCM_ZORK, |
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CODEC_ID_PCM_S16LE_PLANAR, |
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/* various ADPCM codecs */ |
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CODEC_ID_ADPCM_IMA_QT= 0x11000, |
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CODEC_ID_ADPCM_IMA_WAV, |
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CODEC_ID_ADPCM_IMA_DK3, |
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CODEC_ID_ADPCM_IMA_DK4, |
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CODEC_ID_ADPCM_IMA_WS, |
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CODEC_ID_ADPCM_IMA_SMJPEG, |
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CODEC_ID_ADPCM_MS, |
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CODEC_ID_ADPCM_4XM, |
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CODEC_ID_ADPCM_XA, |
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CODEC_ID_ADPCM_ADX, |
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CODEC_ID_ADPCM_EA, |
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CODEC_ID_ADPCM_G726, |
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CODEC_ID_ADPCM_CT, |
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CODEC_ID_ADPCM_SWF, |
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CODEC_ID_ADPCM_YAMAHA, |
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CODEC_ID_ADPCM_SBPRO_4, |
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CODEC_ID_ADPCM_SBPRO_3, |
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CODEC_ID_ADPCM_SBPRO_2, |
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CODEC_ID_ADPCM_THP, |
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CODEC_ID_ADPCM_IMA_AMV, |
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CODEC_ID_ADPCM_EA_R1, |
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CODEC_ID_ADPCM_EA_R3, |
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CODEC_ID_ADPCM_EA_R2, |
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CODEC_ID_ADPCM_IMA_EA_SEAD, |
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CODEC_ID_ADPCM_IMA_EA_EACS, |
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CODEC_ID_ADPCM_EA_XAS, |
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/* AMR */ |
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CODEC_ID_AMR_NB= 0x12000, |
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CODEC_ID_AMR_WB, |
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/* RealAudio codecs*/ |
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CODEC_ID_RA_144= 0x13000, |
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CODEC_ID_RA_288, |
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/* various DPCM codecs */ |
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CODEC_ID_ROQ_DPCM= 0x14000, |
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CODEC_ID_INTERPLAY_DPCM, |
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CODEC_ID_XAN_DPCM, |
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CODEC_ID_SOL_DPCM, |
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CODEC_ID_MP2= 0x15000, |
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CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
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CODEC_ID_AAC, |
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
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CODEC_ID_MPEG4AAC, |
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#endif |
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CODEC_ID_AC3, |
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CODEC_ID_DTS, |
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CODEC_ID_VORBIS, |
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CODEC_ID_DVAUDIO, |
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CODEC_ID_WMAV1, |
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CODEC_ID_WMAV2, |
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CODEC_ID_MACE3, |
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CODEC_ID_MACE6, |
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CODEC_ID_VMDAUDIO, |
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CODEC_ID_SONIC, |
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CODEC_ID_SONIC_LS, |
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CODEC_ID_FLAC, |
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CODEC_ID_MP3ADU, |
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CODEC_ID_MP3ON4, |
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CODEC_ID_SHORTEN, |
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CODEC_ID_ALAC, |
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CODEC_ID_WESTWOOD_SND1, |
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CODEC_ID_GSM, ///< as in Berlin toast format |
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CODEC_ID_QDM2, |
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CODEC_ID_COOK, |
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CODEC_ID_TRUESPEECH, |
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CODEC_ID_TTA, |
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CODEC_ID_SMACKAUDIO, |
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CODEC_ID_QCELP, |
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CODEC_ID_WAVPACK, |
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CODEC_ID_DSICINAUDIO, |
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CODEC_ID_IMC, |
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CODEC_ID_MUSEPACK7, |
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CODEC_ID_MLP, |
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CODEC_ID_GSM_MS, /* as found in WAV */ |
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CODEC_ID_ATRAC3, |
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CODEC_ID_VOXWARE, |
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CODEC_ID_APE, |
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CODEC_ID_NELLYMOSER, |
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CODEC_ID_MUSEPACK8, |
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/* subtitle codecs */ |
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CODEC_ID_DVD_SUBTITLE= 0x17000, |
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CODEC_ID_DVB_SUBTITLE, |
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CODEC_ID_TEXT, ///< raw UTF-8 text |
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CODEC_ID_XSUB, |
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CODEC_ID_SSA, |
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CODEC_ID_MOV_TEXT, |
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/* other specific kind of codecs (generaly used for attachments) */ |
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CODEC_ID_TTF= 0x18000, |
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CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
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* stream (only used by libavformat) */ |
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}; |
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
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/* CODEC_ID_MP3LAME is obsolete */ |
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#define CODEC_ID_MP3LAME CODEC_ID_MP3 |
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC |
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#endif |
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enum CodecType { |
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CODEC_TYPE_UNKNOWN = -1, |
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CODEC_TYPE_VIDEO, |
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CODEC_TYPE_AUDIO, |
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CODEC_TYPE_DATA, |
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CODEC_TYPE_SUBTITLE, |
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CODEC_TYPE_ATTACHMENT, |
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CODEC_TYPE_NB |
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}; |
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/** |
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* Currently unused, may be used if 24/32 bits samples are ever supported. |
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* all in native-endian format |
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*/ |
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enum SampleFormat { |
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SAMPLE_FMT_NONE = -1, |
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SAMPLE_FMT_U8, ///< unsigned 8 bits |
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SAMPLE_FMT_S16, ///< signed 16 bits |
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SAMPLE_FMT_S24, ///< signed 24 bits |
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SAMPLE_FMT_S32, ///< signed 32 bits |
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SAMPLE_FMT_FLT, ///< float |
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}; |
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/* in bytes */ |
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio |
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/** |
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* Required number of additionally allocated bytes at the end of the input bitstream for decoding. |
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* This is mainly needed because some optimized bitstream readers read |
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* 32 or 64 bit at once and could read over the end.<br> |
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* Note: If the first 23 bits of the additional bytes are not 0, then damaged |
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* MPEG bitstreams could cause overread and segfault. |
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*/ |
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#define FF_INPUT_BUFFER_PADDING_SIZE 8 |
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/** |
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* minimum encoding buffer size |
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* Used to avoid some checks during header writing. |
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*/ |
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#define FF_MIN_BUFFER_SIZE 16384 |
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/** |
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* motion estimation type. |
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*/ |
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enum Motion_Est_ID { |
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ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed |
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ME_FULL, |
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ME_LOG, |
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ME_PHODS, |
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ME_EPZS, ///< enhanced predictive zonal search |
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ME_X1, ///< reserved for experiments |
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ME_HEX, ///< hexagon based search |
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ME_UMH, ///< uneven multi-hexagon search |
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ME_ITER, ///< iterative search |
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}; |
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enum AVDiscard{ |
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/* We leave some space between them for extensions (drop some |
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* keyframes for intra-only or drop just some bidir frames). */ |
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AVDISCARD_NONE =-16, ///< discard nothing |
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AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi |
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AVDISCARD_NONREF = 8, ///< discard all non reference |
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AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames |
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AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes |
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AVDISCARD_ALL = 48, ///< discard all |
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}; |
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typedef struct RcOverride{ |
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int start_frame; |
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int end_frame; |
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int qscale; // If this is 0 then quality_factor will be used instead. |
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float quality_factor; |
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} RcOverride; |
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#define FF_MAX_B_FRAMES 16 |
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/* encoding support |
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These flags can be passed in AVCodecContext.flags before initialization. |
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Note: Not everything is supported yet. |
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*/ |
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#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. |
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#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. |
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#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. |
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#define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
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#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>. |
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#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning. |
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/** |
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* The parent program guarantees that the input for B-frames containing |
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* streams is not written to for at least s->max_b_frames+1 frames, if |
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* this is not set the input will be copied. |
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*/ |
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
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#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. |
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#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. |
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#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG). |
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#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. |
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#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges. |
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#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. |
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#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random |
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location instead of only at frame boundaries. */ |
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#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization. |
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. |
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#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. |
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#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan. |
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#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< Use trellis quantization. |
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#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. |
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#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). |
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/* Fx : Flag for h263+ extra options */ |
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
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#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this) |
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#endif |
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#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction |
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#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector |
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#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp. |
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#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon. |
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#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC |
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#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC |
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#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter |
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000 |
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#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation |
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data. |
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#define CODEC_FLAG_CLOSED_GOP ((int)0x80000000) |
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#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. |
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#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size. |
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#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. |
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#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. |
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#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references. |
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#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames |
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#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock |
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#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform |
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#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip |
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#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters |
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#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization |
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#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table. |
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#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC). |
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#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. |
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#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping |
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#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. |
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#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer. |
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|
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/* Unsupported options : |
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* Syntax Arithmetic coding (SAC) |
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* Reference Picture Selection |
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* Independent Segment Decoding */ |
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/* /Fx */ |
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/* codec capabilities */ |
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback. |
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/** |
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* Codec uses get_buffer() for allocating buffers. |
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* direct rendering method 1 |
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*/ |
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#define CODEC_CAP_DR1 0x0002 |
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/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */ |
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#define CODEC_CAP_PARSE_ONLY 0x0004 |
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#define CODEC_CAP_TRUNCATED 0x0008 |
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/* Codec can export data for HW decoding (XvMC). */ |
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#define CODEC_CAP_HWACCEL 0x0010 |
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/** |
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* Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data. |
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* If this is not set, the codec is guaranteed to never be fed with NULL data. |
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*/ |
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#define CODEC_CAP_DELAY 0x0020 |
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/** |
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* Codec can be fed a final frame with a smaller size. |
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* This can be used to prevent truncation of the last audio samples. |
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*/ |
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#define CODEC_CAP_SMALL_LAST_FRAME 0x0040 |
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|
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//The following defines may change, don't expect compatibility if you use them. |
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#define MB_TYPE_INTRA4x4 0x0001 |
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#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific |
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#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific |
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#define MB_TYPE_16x16 0x0008 |
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#define MB_TYPE_16x8 0x0010 |
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#define MB_TYPE_8x16 0x0020 |
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#define MB_TYPE_8x8 0x0040 |
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#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_COMMON_FRAME \ |
|
/**\ |
|
* pointer to the picture planes.\ |
|
* This might be different from the first allocated byte\ |
|
* - encoding: \ |
|
* - decoding: \ |
|
*/\ |
|
uint8_t *data[4];\ |
|
int linesize[4];\ |
|
/**\ |
|
* 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[4];\ |
|
/**\ |
|
* 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.\ |
|
*/\ |
|
int pict_type;\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* 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; \ |
|
\ |
|
/**\ |
|
* buffer age (1->was last buffer and dint change, 2->..., ...).\ |
|
* Set to INT_MAX if the buffer has not been used yet.\ |
|
* - encoding: unused\ |
|
* - decoding: MUST be set by get_buffer().\ |
|
*/\ |
|
int age;\ |
|
\ |
|
/**\ |
|
* is this picture used as reference\ |
|
* - 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;\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* 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[4];\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* \ |
|
*/\ |
|
int qscale_type;\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* Pan scan.\ |
|
* - encoding: Set by user.\ |
|
* - decoding: Set by libavcodec.\ |
|
*/\ |
|
AVPanScan *pan_scan;\ |
|
\ |
|
/**\ |
|
* 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;\ |
|
\ |
|
/**\ |
|
* DCT coefficients\ |
|
* - encoding: unused\ |
|
* - decoding: Set by libavcodec.\ |
|
*/\ |
|
short *dct_coeff;\ |
|
\ |
|
/**\ |
|
* motion referece frame index\ |
|
* - encoding: Set by user.\ |
|
* - decoding: Set by libavcodec.\ |
|
*/\ |
|
int8_t *ref_index[2]; |
|
|
|
#define FF_QSCALE_TYPE_MPEG1 0 |
|
#define FF_QSCALE_TYPE_MPEG2 1 |
|
#define FF_QSCALE_TYPE_H264 2 |
|
|
|
#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_I_TYPE 1 // Intra |
|
#define FF_P_TYPE 2 // Predicted |
|
#define FF_B_TYPE 3 // Bi-dir predicted |
|
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4 |
|
#define FF_SI_TYPE 5 |
|
#define FF_SP_TYPE 6 |
|
|
|
#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). |
|
|
|
/** |
|
* Audio Video Frame. |
|
* New fields can be added to the end of FF_COMMON_FRAME with minor version |
|
* bumps. |
|
* Removal, reordering and changes to existing fields require a major |
|
* version bump. No fields should be added into AVFrame before or after |
|
* FF_COMMON_FRAME! |
|
* sizeof(AVFrame) must not be used outside libav*. |
|
*/ |
|
typedef struct AVFrame { |
|
FF_COMMON_FRAME |
|
} AVFrame; |
|
|
|
#define DEFAULT_FRAME_RATE_BASE 1001000 |
|
|
|
/** |
|
* 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. |
|
* sizeof(AVCodecContext) must not be used outside libav*. |
|
*/ |
|
typedef struct AVCodecContext { |
|
/** |
|
* information on struct for av_log |
|
* - set by avcodec_alloc_context |
|
*/ |
|
AVClass *av_class; |
|
/** |
|
* 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; |
|
|
|
/** |
|
* CODEC_FLAG_*. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int flags; |
|
|
|
/** |
|
* Some codecs need additional format info. It is stored here. |
|
* If any muxer uses this then ALL demuxers/parsers AND encoders for the |
|
* specific codec MUST set it correctly otherwise stream copy breaks. |
|
* In general use of this field by muxers is not recommanded. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. (FIXME: Is this OK?) |
|
*/ |
|
int sub_id; |
|
|
|
/** |
|
* 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) [7, 8 are x264 specific, 9 is snow specific] |
|
* - encoding: MUST be set by user. |
|
* - decoding: unused |
|
*/ |
|
int me_method; |
|
|
|
/** |
|
* 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; |
|
|
|
/* 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; |
|
|
|
#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 PIX_FMT_xxx. |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
enum PixelFormat pix_fmt; |
|
|
|
/** |
|
* Frame rate emulation. If not zero, the lower layer (i.e. format handler) |
|
* has to read frames at native frame rate. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rate_emu; |
|
|
|
/** |
|
* 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. |
|
* - 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[4], |
|
int y, int type, int height); |
|
|
|
/* audio only */ |
|
int sample_rate; ///< samples per second |
|
int channels; |
|
|
|
/** |
|
* audio sample format |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
enum SampleFormat sample_fmt; ///< sample format, currently unused |
|
|
|
/* The following data should not be initialized. */ |
|
/** |
|
* Samples per packet, initialized when calling 'init'. |
|
*/ |
|
int frame_size; |
|
int frame_number; ///< audio or video frame number |
|
int real_pict_num; ///< Returns the real picture number of previous encoded frame. |
|
|
|
/** |
|
* Number of frames the decoded output will be delayed relative to |
|
* the encoded input. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: unused |
|
*/ |
|
int delay; |
|
|
|
/* - 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; |
|
|
|
/** |
|
* 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 |
|
* - 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; |
|
|
|
/** |
|
* hurry up amount |
|
* - encoding: unused |
|
* - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header |
|
* @deprecated Deprecated in favor of skip_idct and skip_frame. |
|
*/ |
|
int hurry_up; |
|
|
|
struct AVCodec *codec; |
|
|
|
void *priv_data; |
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
/* unused, FIXME remove*/ |
|
int rtp_mode; |
|
#endif |
|
|
|
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. */ |
|
|
|
|
|
/* 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); |
|
|
|
/* 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; |
|
|
|
/** |
|
* Private data of the user, can be used to carry app specific stuff. |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
void *opaque; |
|
|
|
char codec_name[32]; |
|
enum CodecType codec_type; /* see CODEC_TYPE_xxx */ |
|
enum CodecID codec_id; /* see 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 then 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; |
|
|
|
/** |
|
* 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_FAKE_SCALABILITY 16 //Autodetection should work 100%. |
|
|
|
/** |
|
* luma single coefficient elimination threshold |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int luma_elim_threshold; |
|
|
|
/** |
|
* chroma single coeff elimination threshold |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int chroma_elim_threshold; |
|
|
|
/** |
|
* strictly follow the standard (MPEG4, ...). |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int strict_std_compliance; |
|
#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a 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_INOFFICIAL -1 ///< Allow inofficial extensions. |
|
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. |
|
|
|
/** |
|
* qscale offset 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_offset; |
|
|
|
/** |
|
* Error resilience; higher values will detect more errors but may |
|
* misdetect some more or less valid parts as errors. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int error_resilience; |
|
#define FF_ER_CAREFUL 1 |
|
#define FF_ER_COMPLIANT 2 |
|
#define FF_ER_AGGRESSIVE 3 |
|
#define FF_ER_VERY_AGGRESSIVE 4 |
|
|
|
/** |
|
* Called at the beginning of each frame to get a buffer for it. |
|
* If pic.reference is set then the frame will be read later by libavcodec. |
|
* avcodec_align_dimensions() should be used to find the required width and |
|
* height, as they normally need to be rounded up to the next multiple of 16. |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec., user can override. |
|
*/ |
|
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
/** |
|
* Called to release buffers which where allocated with get_buffer. |
|
* A released buffer can be reused in get_buffer(). |
|
* pic.data[*] must be set to NULL. |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec., user can override. |
|
*/ |
|
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
/** |
|
* If 1 the stream has a 1 frame delay during decoding. |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int has_b_frames; |
|
|
|
/** |
|
* number of bytes per packet if constant and known or 0 |
|
* Used by some WAV based audio codecs. |
|
*/ |
|
int block_align; |
|
|
|
int parse_only; /* - decoding only: If true, only parsing is done |
|
(function avcodec_parse_frame()). The frame |
|
data is returned. Only MPEG codecs support this now. */ |
|
|
|
/** |
|
* 0-> h263 quant 1-> mpeg quant |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int mpeg_quant; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* ratecontrol qmin qmax limiting method |
|
* 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float rc_qsquish; |
|
|
|
float rc_qmod_amp; |
|
int rc_qmod_freq; |
|
|
|
/** |
|
* ratecontrol override, see RcOverride |
|
* - encoding: Allocated/set/freed by user. |
|
* - decoding: unused |
|
*/ |
|
RcOverride *rc_override; |
|
int rc_override_count; |
|
|
|
/** |
|
* rate control equation |
|
* - encoding: Set by user |
|
* - decoding: unused |
|
*/ |
|
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; |
|
|
|
/** |
|
* decoder bitstream buffer size |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_buffer_size; |
|
float rc_buffer_aggressivity; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* initial complexity for pass1 ratecontrol |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float rc_initial_cplx; |
|
|
|
/** |
|
* 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_MLIB 4 |
|
#define FF_DCT_ALTIVEC 5 |
|
#define FF_DCT_FAAN 6 |
|
|
|
/** |
|
* 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; |
|
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
/* for binary compatibility */ |
|
int unused; |
|
#endif |
|
|
|
/** |
|
* 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 |
|
#define FF_IDCT_PS2 5 |
|
#define FF_IDCT_MLIB 6 |
|
#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 |
|
|
|
/** |
|
* slice count |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by user (or 0). |
|
*/ |
|
int slice_count; |
|
/** |
|
* slice offsets in the frame in bytes |
|
* - encoding: Set/allocated by libavcodec. |
|
* - decoding: Set/allocated by user (or NULL). |
|
*/ |
|
int *slice_offset; |
|
|
|
/** |
|
* error concealment flags |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int error_concealment; |
|
#define FF_EC_GUESS_MVS 1 |
|
#define FF_EC_DEBLOCK 2 |
|
|
|
/** |
|
* dsp_mask could be add used to disable unwanted CPU features |
|
* CPU features (i.e. MMX, SSE. ...) |
|
* |
|
* With the FORCE flag you may instead enable given CPU features. |
|
* (Dangerous: Usable in case of misdetection, improper usage however will |
|
* result into program crash.) |
|
*/ |
|
unsigned dsp_mask; |
|
#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */ |
|
/* lower 16 bits - CPU features */ |
|
#define FF_MM_MMX 0x0001 ///< standard MMX |
|
#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW |
|
#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext |
|
#define FF_MM_SSE 0x0008 ///< SSE functions |
|
#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions |
|
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt |
|
#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions |
|
#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions |
|
#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT |
|
|
|
/** |
|
* bits per sample/pixel from the demuxer (needed for huffyuv). |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by user. |
|
*/ |
|
int bits_per_sample; |
|
|
|
/** |
|
* 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 |
|
|
|
/** |
|
* sample aspect ratio (0 if unknown) |
|
* 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; |
|
|
|
/** |
|
* the picture in the bitstream |
|
* - encoding: Set by libavcodec. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
AVFrame *coded_frame; |
|
|
|
/** |
|
* 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 |
|
|
|
/** |
|
* 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 |
|
* - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. |
|
* - decoding: unused |
|
*/ |
|
uint64_t error[4]; |
|
|
|
/** |
|
* minimum MB quantizer |
|
* - encoding: unused |
|
* - decoding: unused |
|
*/ |
|
int mb_qmin; |
|
|
|
/** |
|
* maximum MB quantizer |
|
* - encoding: unused |
|
* - decoding: unused |
|
*/ |
|
int mb_qmax; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* 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 PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt); |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* color table ID |
|
* - encoding: unused |
|
* - decoding: Which clrtable should be used for 8bit RGB images. |
|
* Tables have to be stored somewhere. FIXME |
|
*/ |
|
int color_table_id; |
|
|
|
/** |
|
* internal_buffer count |
|
* Don't touch, used by libavcodec default_get_buffer(). |
|
*/ |
|
int internal_buffer_count; |
|
|
|
/** |
|
* internal_buffers |
|
* Don't touch, used by libavcodec default_get_buffer(). |
|
*/ |
|
void *internal_buffer; |
|
|
|
#define FF_LAMBDA_SHIFT 7 |
|
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT) |
|
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda |
|
#define FF_LAMBDA_MAX (256*128-1) |
|
|
|
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove |
|
/** |
|
* 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; |
|
|
|
#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; |
|
#if 0 |
|
/** |
|
* |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size); |
|
#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 distoration |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* scene change detection threshold |
|
* 0 is default, larger means fewer detected scene changes. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int scenechange_threshold; |
|
|
|
/** |
|
* minimum Lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int lmin; |
|
|
|
/** |
|
* maximum Lagrange multipler |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int lmax; |
|
|
|
/** |
|
* palette control structure |
|
* - encoding: ??? (no palette-enabled encoder yet) |
|
* - decoding: Set by user. |
|
*/ |
|
struct AVPaletteControl *palctrl; |
|
|
|
/** |
|
* noise reduction strength |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int noise_reduction; |
|
|
|
/** |
|
* 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(). |
|
* - encoding: unused |
|
* - decoding: Set by libavcodec., user can override |
|
*/ |
|
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int inter_threshold; |
|
|
|
/** |
|
* CODEC_FLAG2_* |
|
* - encoding: Set by user. |
|
* - decoding: Set by user. |
|
*/ |
|
int flags2; |
|
|
|
/** |
|
* Simulates errors in the bitstream to test error concealment. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int error_rate; |
|
|
|
/** |
|
* MP3 antialias algorithm, see FF_AA_* below. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int antialias_algo; |
|
#define FF_AA_AUTO 0 |
|
#define FF_AA_FASTINT 1 //not implemented yet |
|
#define FF_AA_INT 2 |
|
#define FF_AA_FLOAT 3 |
|
/** |
|
* quantizer noise shaping |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int quantizer_noise_shaping; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* 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); |
|
|
|
/** |
|
* thread opaque |
|
* Can be used by execute() to store some per AVCodecContext stuff. |
|
* - encoding: set by execute() |
|
* - decoding: set by execute() |
|
*/ |
|
void *thread_opaque; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* noise vs. sse weight for the nsse comparsion function |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int nsse_weight; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* profile |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int profile; |
|
#define FF_PROFILE_UNKNOWN -99 |
|
#define FF_PROFILE_AAC_MAIN 0 |
|
#define FF_PROFILE_AAC_LOW 1 |
|
#define FF_PROFILE_AAC_SSR 2 |
|
#define FF_PROFILE_AAC_LTP 3 |
|
|
|
/** |
|
* level |
|
* - encoding: Set by user. |
|
* - decoding: Set by libavcodec. |
|
*/ |
|
int level; |
|
#define FF_LEVEL_UNKNOWN -99 |
|
|
|
/** |
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int lowres; |
|
|
|
/** |
|
* Bitstream width / height, may be different from width/height if lowres |
|
* or other things are used. |
|
* - encoding: unused |
|
* - decoding: Set by user before init if known. Codec should override / dynamically change if needed. |
|
*/ |
|
int coded_width, coded_height; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* 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: 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; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int bidir_refine; |
|
|
|
/** |
|
* |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int brd_scale; |
|
|
|
/** |
|
* constant rate factor - quality-based VBR - values ~correspond to qps |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float crf; |
|
|
|
/** |
|
* constant quantization parameter rate control method |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int cqp; |
|
|
|
/** |
|
* minimum GOP size |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int keyint_min; |
|
|
|
/** |
|
* number of reference frames |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int refs; |
|
|
|
/** |
|
* chroma qp offset from luma |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int chromaoffset; |
|
|
|
/** |
|
* Influences how often B-frames are used. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int bframebias; |
|
|
|
/** |
|
* trellis RD quantization |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int trellis; |
|
|
|
/** |
|
* Reduce fluctuations in qp (before curve compression). |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
float complexityblur; |
|
|
|
/** |
|
* in-loop deblocking filter alphac0 parameter |
|
* alpha is in the range -6...6 |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int deblockalpha; |
|
|
|
/** |
|
* in-loop deblocking filter beta parameter |
|
* beta is in the range -6...6 |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int deblockbeta; |
|
|
|
/** |
|
* macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4 |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int partitions; |
|
#define X264_PART_I4X4 0x001 /* Analyze i4x4 */ |
|
#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */ |
|
#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */ |
|
#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */ |
|
#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */ |
|
|
|
/** |
|
* direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal) |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int directpred; |
|
|
|
/** |
|
* Audio cutoff bandwidth (0 means "automatic") |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int cutoff; |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* Adjusts sensitivity of b_frame_strategy 1. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int b_sensitivity; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int compression_level; |
|
#define FF_COMPRESSION_DEFAULT -1 |
|
|
|
/** |
|
* Sets whether to use LPC mode - used by FLAC encoder. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int use_lpc; |
|
|
|
/** |
|
* LPC coefficient precision - used by FLAC encoder |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int lpc_coeff_precision; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int min_prediction_order; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int max_prediction_order; |
|
|
|
/** |
|
* search method for selecting prediction order |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int prediction_order_method; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int min_partition_order; |
|
|
|
/** |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int max_partition_order; |
|
|
|
/** |
|
* GOP timecode frame start number, in non drop frame format |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int64_t timecode_frame_start; |
|
|
|
/** |
|
* Decoder should decode to this many channels if it can (0 for default) |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int request_channels; |
|
|
|
/** |
|
* Percentage of dynamic range compression to be applied by the decoder. |
|
* The default value is 1.0, corresponding to full compression. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
float drc_scale; |
|
} AVCodecContext; |
|
|
|
/** |
|
* 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; |
|
enum CodecType type; |
|
enum CodecID id; |
|
int priv_data_size; |
|
int (*init)(AVCodecContext *); |
|
int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data); |
|
int (*close)(AVCodecContext *); |
|
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, |
|
const uint8_t *buf, int buf_size); |
|
int capabilities; |
|
struct AVCodec *next; |
|
void (*flush)(AVCodecContext *); |
|
const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0} |
|
const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1 |
|
} AVCodec; |
|
|
|
/** |
|
* four components are given, that's all. |
|
* the last component is alpha |
|
*/ |
|
typedef struct AVPicture { |
|
uint8_t *data[4]; |
|
int linesize[4]; ///< number of bytes per line |
|
} AVPicture; |
|
|
|
/** |
|
* AVPaletteControl |
|
* This structure defines a method for communicating palette changes |
|
* between and demuxer and a decoder. |
|
* |
|
* @deprecated Use AVPacket to send palette changes instead. |
|
* This is totally broken. |
|
*/ |
|
#define AVPALETTE_SIZE 1024 |
|
#define AVPALETTE_COUNT 256 |
|
typedef struct AVPaletteControl { |
|
|
|
/* Demuxer sets this to 1 to indicate the palette has changed; |
|
* decoder resets to 0. */ |
|
int palette_changed; |
|
|
|
/* 4-byte ARGB palette entries, stored in native byte order; note that |
|
* the individual palette components should be on a 8-bit scale; if |
|
* the palette data comes from an IBM VGA native format, the component |
|
* data is probably 6 bits in size and needs to be scaled. */ |
|
unsigned int palette[AVPALETTE_COUNT]; |
|
|
|
} AVPaletteControl attribute_deprecated; |
|
|
|
typedef struct AVSubtitleRect { |
|
uint16_t x; |
|
uint16_t y; |
|
uint16_t w; |
|
uint16_t h; |
|
uint16_t nb_colors; |
|
int linesize; |
|
uint32_t *rgba_palette; |
|
uint8_t *bitmap; |
|
} 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 */ |
|
uint32_t num_rects; |
|
AVSubtitleRect *rects; |
|
} AVSubtitle; |
|
|
|
|
|
/* resample.c */ |
|
|
|
struct ReSampleContext; |
|
struct AVResampleContext; |
|
|
|
typedef struct ReSampleContext ReSampleContext; |
|
|
|
ReSampleContext *audio_resample_init(int output_channels, int input_channels, |
|
int output_rate, int input_rate); |
|
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); |
|
void audio_resample_close(ReSampleContext *s); |
|
|
|
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); |
|
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); |
|
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); |
|
void av_resample_close(struct AVResampleContext *c); |
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
/* YUV420 format is assumed ! */ |
|
|
|
/** |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated; |
|
|
|
/** |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height, |
|
int input_width, int input_height); |
|
|
|
/** |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight, |
|
int iwidth, int iheight, |
|
int topBand, int bottomBand, |
|
int leftBand, int rightBand, |
|
int padtop, int padbottom, |
|
int padleft, int padright); |
|
|
|
/** |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
attribute_deprecated void img_resample(struct ImgReSampleContext *s, |
|
AVPicture *output, const AVPicture *input); |
|
|
|
/** |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s); |
|
|
|
#endif |
|
|
|
/** |
|
* Allocate memory for a picture. Call avpicture_free to free it. |
|
* |
|
* @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, int pix_fmt, int width, int height); |
|
|
|
/** |
|
* Free a picture previously allocated by avpicture_alloc(). |
|
* |
|
* @param picture the AVPicture to be freed |
|
*/ |
|
void avpicture_free(AVPicture *picture); |
|
|
|
/** |
|
* Fill in the AVPicture fields. |
|
* The fields of the given AVPicture are filled in by using the 'ptr' address |
|
* which points to the image data buffer. Depending on the specified picture |
|
* format, one or multiple image data pointers and line sizes will be set. |
|
* If a planar format is specified, several pointers will be set pointing to |
|
* the different picture planes and the line sizes of the different planes |
|
* will be stored in the lines_sizes array. |
|
* |
|
* @param picture AVPicture whose fields are to be filled in |
|
* @param ptr Buffer which will contain or contains the actual image data |
|
* @param pix_fmt The format in which the picture data is stored. |
|
* @param width the width of the image in pixels |
|
* @param height the height of the image in pixels |
|
* @return size of the image data in bytes |
|
*/ |
|
int avpicture_fill(AVPicture *picture, uint8_t *ptr, |
|
int pix_fmt, int width, int height); |
|
int avpicture_layout(const AVPicture* src, int 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. |
|
* |
|
* @param pix_fmt the given picture format |
|
* @param width the width of the image |
|
* @param height the height of the image |
|
* @return Image data size in bytes |
|
*/ |
|
int avpicture_get_size(int pix_fmt, int width, int height); |
|
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift); |
|
const char *avcodec_get_pix_fmt_name(int pix_fmt); |
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
|
enum PixelFormat avcodec_get_pix_fmt(const char* name); |
|
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p); |
|
|
|
#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) */ |
|
|
|
/** |
|
* Computes 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. |
|
*/ |
|
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt, |
|
int has_alpha); |
|
|
|
/** |
|
* Finds 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 |
|
* \p pix_fmt_mask parameter. |
|
* |
|
* @code |
|
* src_pix_fmt = PIX_FMT_YUV420P; |
|
* pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << 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. |
|
*/ |
|
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt, |
|
int has_alpha, int *loss_ptr); |
|
|
|
|
|
/** |
|
* Print in buf the string corresponding to the pixel format with |
|
* number pix_fmt, or an header if pix_fmt is negative. |
|
* |
|
* @param[in] buf the buffer where to write the string |
|
* @param[in] buf_size the size of buf |
|
* @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or |
|
* a negative value to print the corresponding header. |
|
* Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1. |
|
*/ |
|
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt); |
|
|
|
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */ |
|
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */ |
|
|
|
/** |
|
* Tell if an image really has transparent alpha values. |
|
* @return ored mask of FF_ALPHA_xxx constants |
|
*/ |
|
int img_get_alpha_info(const AVPicture *src, |
|
int pix_fmt, int width, int height); |
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
/** |
|
* convert among pixel formats |
|
* @deprecated Use the software scaler (swscale) instead. |
|
*/ |
|
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt, |
|
const AVPicture *src, int pix_fmt, |
|
int width, int height); |
|
#endif |
|
|
|
/* deinterlace a picture */ |
|
/* deinterlace - if not supported return -1 */ |
|
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, |
|
int pix_fmt, int width, int height); |
|
|
|
/* external high level API */ |
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
extern AVCodec *first_avcodec; |
|
#endif |
|
AVCodec *av_codec_next(AVCodec *c); |
|
|
|
/* returns LIBAVCODEC_VERSION_INT constant */ |
|
unsigned avcodec_version(void); |
|
/* returns LIBAVCODEC_BUILD constant */ |
|
unsigned avcodec_build(void); |
|
|
|
/** |
|
* Initializes libavcodec. |
|
* |
|
* @warning This function \e must be called before any other libavcodec |
|
* function. |
|
*/ |
|
void avcodec_init(void); |
|
|
|
void register_avcodec(AVCodec *format); |
|
|
|
/** |
|
* Finds a registered encoder with a matching codec ID. |
|
* |
|
* @param id CodecID of the requested encoder |
|
* @return An encoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_encoder(enum CodecID id); |
|
|
|
/** |
|
* Finds 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); |
|
|
|
/** |
|
* Finds a registered decoder with a matching codec ID. |
|
* |
|
* @param id CodecID of the requested decoder |
|
* @return A decoder if one was found, NULL otherwise. |
|
*/ |
|
AVCodec *avcodec_find_decoder(enum CodecID id); |
|
|
|
/** |
|
* Finds 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); |
|
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); |
|
|
|
/** |
|
* Sets the fields of the given AVCodecContext to default values. |
|
* |
|
* @param s The AVCodecContext of which the fields should be set to default values. |
|
*/ |
|
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! */ |
|
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType); |
|
|
|
/** |
|
* Allocates an AVCodecContext and sets 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 |
|
*/ |
|
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! */ |
|
AVCodecContext *avcodec_alloc_context2(enum CodecType); |
|
|
|
/** |
|
* Sets the fields of the given AVFrame to default values. |
|
* |
|
* @param pic The AVFrame of which the fields should be set to default values. |
|
*/ |
|
void avcodec_get_frame_defaults(AVFrame *pic); |
|
|
|
/** |
|
* Allocates an AVFrame and sets its fields to default values. The resulting |
|
* struct can be deallocated by simply calling av_free(). |
|
* |
|
* @return An AVFrame filled with default values or NULL on failure. |
|
* @see avcodec_get_frame_defaults |
|
*/ |
|
AVFrame *avcodec_alloc_frame(void); |
|
|
|
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); |
|
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); |
|
|
|
/** |
|
* Checks if the given dimension of a picture is valid, meaning that all |
|
* bytes of the picture can be addressed with a signed int. |
|
* |
|
* @param[in] w Width of the picture. |
|
* @param[in] h Height of the picture. |
|
* @return Zero if valid, a negative value if invalid. |
|
*/ |
|
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h); |
|
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt); |
|
|
|
int avcodec_thread_init(AVCodecContext *s, int thread_count); |
|
void avcodec_thread_free(AVCodecContext *s); |
|
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count); |
|
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count); |
|
//FIXME func typedef |
|
|
|
/** |
|
* Initializes 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(CODEC_ID_H264); |
|
* if (!codec) |
|
* exit(1); |
|
* |
|
* context = avcodec_alloc_context(); |
|
* |
|
* 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_context, avcodec_find_decoder, avcodec_find_encoder |
|
*/ |
|
int avcodec_open(AVCodecContext *avctx, AVCodec *codec); |
|
|
|
/** |
|
* @deprecated Use avcodec_decode_audio2() instead. |
|
*/ |
|
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, |
|
int *frame_size_ptr, |
|
const uint8_t *buf, int buf_size); |
|
|
|
/** |
|
* Decodes an audio frame from \p buf into \p samples. |
|
* The avcodec_decode_audio2() function decodes an audio frame from the input |
|
* buffer \p buf of size \p buf_size. To decode it, it makes use of the |
|
* audio codec which was coupled with \p avctx using avcodec_open(). The |
|
* resulting decoded frame is stored in output buffer \p samples. If no frame |
|
* could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the |
|
* decompressed frame size in \e bytes. |
|
* |
|
* @warning You \e must set \p frame_size_ptr to the allocated size of the |
|
* output buffer before calling avcodec_decode_audio2(). |
|
* |
|
* @warning The input buffer must be \c 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 \p 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 \p buf and output buffer \p |
|
* 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, the |
|
* bitstream should have 4 byte alignment at minimum and all sample data should |
|
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If |
|
* the linesize is not a multiple of 16 then there's no sense in aligning the |
|
* start of the buffer to 16. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] samples the output buffer |
|
* @param[in,out] frame_size_ptr the output buffer size in bytes |
|
* @param[in] buf the input buffer |
|
* @param[in] buf_size the input buffer size in bytes |
|
* @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_audio2(AVCodecContext *avctx, int16_t *samples, |
|
int *frame_size_ptr, |
|
const uint8_t *buf, int buf_size); |
|
|
|
/** |
|
* Decodes a video frame from \p buf into \p picture. |
|
* The avcodec_decode_video() function decodes a video frame from the input |
|
* buffer \p buf of size \p buf_size. To decode it, it makes use of the |
|
* video codec which was coupled with \p avctx using avcodec_open(). The |
|
* resulting decoded frame is stored in \p picture. |
|
* |
|
* @warning The input buffer must be \c 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 \p 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 \p buf and output buffer \p |
|
* 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, the |
|
* bitstream should have 4 byte alignment at minimum and all sample data should |
|
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If |
|
* the linesize is not a multiple of 16 then there's no sense in aligning the |
|
* start of the buffer to 16. |
|
* |
|
* @param avctx the codec context |
|
* @param[out] picture The AVFrame in which the decoded video frame will be stored. |
|
* @param[in] buf the input buffer |
|
* @param[in] buf_size the size of the input buffer in bytes |
|
* @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_video(AVCodecContext *avctx, AVFrame *picture, |
|
int *got_picture_ptr, |
|
const uint8_t *buf, int buf_size); |
|
|
|
/* Decode a subtitle message. Return -1 if 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. */ |
|
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub, |
|
int *got_sub_ptr, |
|
const uint8_t *buf, int buf_size); |
|
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata, |
|
int *data_size_ptr, |
|
uint8_t *buf, int buf_size); |
|
|
|
/** |
|
* Encodes an audio frame from \p samples into \p buf. |
|
* The avcodec_encode_audio() function encodes an audio frame from the input |
|
* buffer \p samples. To encode it, it makes use of the audio codec which was |
|
* coupled with \p avctx using avcodec_open(). The resulting encoded frame is |
|
* stored in output buffer \p buf. |
|
* |
|
* @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large. |
|
* |
|
* @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 \p avctx. |
|
* @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 avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
|
const short *samples); |
|
|
|
/** |
|
* Encodes a video frame from \p pict into \p buf. |
|
* The avcodec_encode_video() function encodes a video frame from the input |
|
* \p pict. To encode it, it makes use of the video codec which was coupled with |
|
* \p avctx using avcodec_open(). The resulting encoded bytes representing the |
|
* frame are stored in the output buffer \p buf. The input picture should be |
|
* stored using a specific format, namely \c 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 input buffer. |
|
*/ |
|
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
|
const AVFrame *pict); |
|
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
|
const AVSubtitle *sub); |
|
|
|
int avcodec_close(AVCodecContext *avctx); |
|
|
|
void avcodec_register_all(void); |
|
|
|
/** |
|
* 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); |
|
|
|
/* misc useful functions */ |
|
|
|
/** |
|
* Returns a single letter to describe the given picture type \p pict_type. |
|
* |
|
* @param[in] pict_type the picture type |
|
* @return A single character representing the picture type. |
|
*/ |
|
char av_get_pict_type_char(int pict_type); |
|
|
|
/** |
|
* Returns 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 CodecID codec_id); |
|
|
|
/** |
|
* Returns sample format bits per sample. |
|
* |
|
* @param[in] sample_fmt the sample format |
|
* @return Number of bits per sample or zero if unknown for the given sample format. |
|
*/ |
|
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt); |
|
|
|
/* 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 last_frame_offset; /* offset of the last frame */ |
|
/* video info */ |
|
int pict_type; /* XXX: Put it back in AVCodecContext. */ |
|
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 |
|
|
|
int64_t offset; ///< byte offset from starting packet start |
|
int64_t last_offset; |
|
} 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; |
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
|
extern AVCodecParser *av_first_parser; |
|
#endif |
|
AVCodecParser *av_parser_next(AVCodecParser *c); |
|
|
|
void av_register_codec_parser(AVCodecParser *parser); |
|
AVCodecParserContext *av_parser_init(int codec_id); |
|
int av_parser_parse(AVCodecParserContext *s, |
|
AVCodecContext *avctx, |
|
uint8_t **poutbuf, int *poutbuf_size, |
|
const uint8_t *buf, int buf_size, |
|
int64_t pts, int64_t dts); |
|
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); |
|
|
|
|
|
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); |
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AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); |
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int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, |
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AVCodecContext *avctx, const char *args, |
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uint8_t **poutbuf, int *poutbuf_size, |
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const uint8_t *buf, int buf_size, int keyframe); |
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void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); |
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AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f); |
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/* memory */ |
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/** |
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* Reallocates the given block if it is not large enough, otherwise it |
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* does nothing. |
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* |
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* @see av_realloc |
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*/ |
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void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size); |
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/* for static data only */ |
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/** |
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* Frees all static arrays and resets their pointers to 0. |
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* Call this function to release all statically allocated tables. |
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* |
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* @deprecated. Code which uses av_free_static is broken/misdesigned |
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* and should correctly use static arrays |
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* |
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*/ |
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attribute_deprecated void av_free_static(void); |
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/** |
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* Allocation of static arrays. |
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* |
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* @warning Do not use for normal allocation. |
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* |
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* @param[in] size The amount of memory you need in bytes. |
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* @return block of memory of the requested size |
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* @deprecated. Code which uses av_mallocz_static is broken/misdesigned |
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* and should correctly use static arrays |
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*/ |
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attribute_deprecated void *av_mallocz_static(unsigned int size); |
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/** |
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* Copy image 'src' to 'dst'. |
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*/ |
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void av_picture_copy(AVPicture *dst, const AVPicture *src, |
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int pix_fmt, int width, int height); |
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/** |
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* Crop image top and left side. |
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*/ |
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int av_picture_crop(AVPicture *dst, const AVPicture *src, |
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int pix_fmt, int top_band, int left_band); |
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/** |
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* Pad image. |
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*/ |
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int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt, |
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int padtop, int padbottom, int padleft, int padright, int *color); |
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) |
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/** |
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* @deprecated Use the software scaler (swscale) instead. |
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*/ |
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attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src, |
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int pix_fmt, int width, int height); |
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/** |
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* @deprecated Use the software scaler (swscale) instead. |
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*/ |
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attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src, |
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int pix_fmt, int top_band, int left_band); |
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/** |
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* @deprecated Use the software scaler (swscale) instead. |
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*/ |
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attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt, |
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int padtop, int padbottom, int padleft, int padright, int *color); |
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#endif |
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extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v); |
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/** |
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* Parses \p str and put in \p width_ptr and \p height_ptr the detected values. |
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* |
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* @return 0 in case of a successful parsing, a negative value otherwise |
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* @param[in] str the string to parse: it has to be a string in the format |
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* <width>x<height> or a valid video frame size abbreviation. |
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* @param[in,out] width_ptr pointer to the variable which will contain the detected |
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* frame width value |
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* @param[in,out] height_ptr pointer to the variable which will contain the detected |
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* frame height value |
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*/ |
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int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str); |
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/** |
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* Parses \p str and put in \p frame_rate the detected values. |
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* |
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* @return 0 in case of a successful parsing, a negative value otherwise |
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* @param[in] str the string to parse: it has to be a string in the format |
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* <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation |
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* @param[in,out] frame_rate pointer to the AVRational which will contain the detected |
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* frame rate |
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*/ |
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int av_parse_video_frame_rate(AVRational *frame_rate, const char *str); |
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/* error handling */ |
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#if EINVAL > 0 |
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#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */ |
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#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */ |
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#else |
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/* Some platforms have E* and errno already negated. */ |
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#define AVERROR(e) (e) |
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#define AVUNERROR(e) (e) |
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#endif |
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#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */ |
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#define AVERROR_IO AVERROR(EIO) /**< I/O error */ |
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#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */ |
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#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */ |
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#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */ |
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#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */ |
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#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */ |
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#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */ |
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#define AVERROR_PATCHWELCOME -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */ |
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#endif /* FFMPEG_AVCODEC_H */
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