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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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 * @file
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 * external API header
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 */
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#include <errno.h>
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#include "libavutil/samplefmt.h"
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#include "libavutil/avutil.h"
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#include "libavutil/cpu.h"
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#include "libavcodec/version.h"
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#   define FF_INTERNALC_MEM_TYPE unsigned int
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#else
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#   define FF_INTERNALC_MEM_TYPE size_t
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#endif
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/**
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 * Identify the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. 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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    /* video codecs */
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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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#if LIBAVCODEC_VERSION_MAJOR < 53
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    CODEC_ID_XVID,
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#endif
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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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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    CODEC_ID_RL2,
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    CODEC_ID_8SVX_EXP,
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    CODEC_ID_8SVX_FIB,
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    CODEC_ID_ESCAPE124,
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    CODEC_ID_DIRAC,
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    CODEC_ID_BFI,
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    CODEC_ID_CMV,
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    CODEC_ID_MOTIONPIXELS,
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    CODEC_ID_TGV,
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    CODEC_ID_TGQ,
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    CODEC_ID_TQI,
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    CODEC_ID_AURA,
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    CODEC_ID_AURA2,
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    CODEC_ID_V210X,
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    CODEC_ID_TMV,
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    CODEC_ID_V210,
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    CODEC_ID_DPX,
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    CODEC_ID_MAD,
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    CODEC_ID_FRWU,
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    CODEC_ID_FLASHSV2,
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    CODEC_ID_CDGRAPHICS,
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    CODEC_ID_R210,
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    CODEC_ID_ANM,
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    CODEC_ID_BINKVIDEO,
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    CODEC_ID_IFF_ILBM,
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    CODEC_ID_IFF_BYTERUN1,
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    CODEC_ID_KGV1,
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    CODEC_ID_YOP,
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    CODEC_ID_VP8,
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    CODEC_ID_PICTOR,
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    CODEC_ID_ANSI,
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    CODEC_ID_A64_MULTI,
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    CODEC_ID_A64_MULTI5,
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    CODEC_ID_R10K,
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    CODEC_ID_MXPEG,
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    CODEC_ID_LAGARITH,
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    CODEC_ID_PRORES,
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    CODEC_ID_JV,
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    CODEC_ID_DFA,
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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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    CODEC_ID_PCM_DVD,
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    CODEC_ID_PCM_F32BE,
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    CODEC_ID_PCM_F32LE,
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    CODEC_ID_PCM_F64BE,
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    CODEC_ID_PCM_F64LE,
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    CODEC_ID_PCM_BLURAY,
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    CODEC_ID_PCM_LXF,
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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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    CODEC_ID_ADPCM_EA_MAXIS_XA,
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    CODEC_ID_ADPCM_IMA_ISS,
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    CODEC_ID_ADPCM_G722,
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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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    /* audio codecs */
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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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    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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    CODEC_ID_SPEEX,
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    CODEC_ID_WMAVOICE,
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    CODEC_ID_WMAPRO,
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    CODEC_ID_WMALOSSLESS,
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    CODEC_ID_ATRAC3P,
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    CODEC_ID_EAC3,
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    CODEC_ID_SIPR,
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    CODEC_ID_MP1,
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    CODEC_ID_TWINVQ,
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    CODEC_ID_TRUEHD,
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    CODEC_ID_MP4ALS,
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    CODEC_ID_ATRAC1,
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    CODEC_ID_BINKAUDIO_RDFT,
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    CODEC_ID_BINKAUDIO_DCT,
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    CODEC_ID_AAC_LATM,
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    CODEC_ID_QDMC,
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    CODEC_ID_CELT,
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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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    CODEC_ID_HDMV_PGS_SUBTITLE,
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    CODEC_ID_DVB_TELETEXT,
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    CODEC_ID_SRT,
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    CODEC_ID_MICRODVD,
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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
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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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    CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing only metadata information.
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};
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#define CodecType AVMediaType
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#define CODEC_TYPE_UNKNOWN    AVMEDIA_TYPE_UNKNOWN
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#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
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#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
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#define CODEC_TYPE_DATA       AVMEDIA_TYPE_DATA
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#define CODEC_TYPE_SUBTITLE   AVMEDIA_TYPE_SUBTITLE
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#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
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#define CODEC_TYPE_NB         AVMEDIA_TYPE_NB
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#endif
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#if FF_API_OLD_SAMPLE_FMT
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#define SampleFormat AVSampleFormat
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#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
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#define SAMPLE_FMT_U8   AV_SAMPLE_FMT_U8
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#define SAMPLE_FMT_S16  AV_SAMPLE_FMT_S16
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#define SAMPLE_FMT_S32  AV_SAMPLE_FMT_S32
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#define SAMPLE_FMT_FLT  AV_SAMPLE_FMT_FLT
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#define SAMPLE_FMT_DBL  AV_SAMPLE_FMT_DBL
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#define SAMPLE_FMT_NB   AV_SAMPLE_FMT_NB
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#endif
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#if FF_API_OLD_AUDIOCONVERT
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#include "libavutil/audioconvert.h"
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/* Audio channel masks */
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#define CH_FRONT_LEFT            AV_CH_FRONT_LEFT
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#define CH_FRONT_RIGHT           AV_CH_FRONT_RIGHT
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#define CH_FRONT_CENTER          AV_CH_FRONT_CENTER
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#define CH_LOW_FREQUENCY         AV_CH_LOW_FREQUENCY
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#define CH_BACK_LEFT             AV_CH_BACK_LEFT
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#define CH_BACK_RIGHT            AV_CH_BACK_RIGHT
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#define CH_FRONT_LEFT_OF_CENTER  AV_CH_FRONT_LEFT_OF_CENTER
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#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
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#define CH_BACK_CENTER           AV_CH_BACK_CENTER
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#define CH_SIDE_LEFT             AV_CH_SIDE_LEFT
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#define CH_SIDE_RIGHT            AV_CH_SIDE_RIGHT
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#define CH_TOP_CENTER            AV_CH_TOP_CENTER
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#define CH_TOP_FRONT_LEFT        AV_CH_TOP_FRONT_LEFT
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#define CH_TOP_FRONT_CENTER      AV_CH_TOP_FRONT_CENTER
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#define CH_TOP_FRONT_RIGHT       AV_CH_TOP_FRONT_RIGHT
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#define CH_TOP_BACK_LEFT         AV_CH_TOP_BACK_LEFT
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#define CH_TOP_BACK_CENTER       AV_CH_TOP_BACK_CENTER
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#define CH_TOP_BACK_RIGHT        AV_CH_TOP_BACK_RIGHT
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#define CH_STEREO_LEFT           AV_CH_STEREO_LEFT
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#define CH_STEREO_RIGHT          AV_CH_STEREO_RIGHT
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/** Channel mask value used for AVCodecContext.request_channel_layout
419
    to indicate that the user requests the channel order of the decoder output
420
    to be the native codec channel order. */
421
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
424
#define CH_LAYOUT_MONO           AV_CH_LAYOUT_MONO
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#define CH_LAYOUT_STEREO         AV_CH_LAYOUT_STEREO
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#define CH_LAYOUT_2_1            AV_CH_LAYOUT_2_1
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#define CH_LAYOUT_SURROUND       AV_CH_LAYOUT_SURROUND
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#define CH_LAYOUT_4POINT0        AV_CH_LAYOUT_4POINT0
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#define CH_LAYOUT_2_2            AV_CH_LAYOUT_2_2
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#define CH_LAYOUT_QUAD           AV_CH_LAYOUT_QUAD
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#define CH_LAYOUT_5POINT0        AV_CH_LAYOUT_5POINT0
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#define CH_LAYOUT_5POINT1        AV_CH_LAYOUT_5POINT1
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#define CH_LAYOUT_5POINT0_BACK   AV_CH_LAYOUT_5POINT0_BACK
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#define CH_LAYOUT_5POINT1_BACK   AV_CH_LAYOUT_5POINT1_BACK
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#define CH_LAYOUT_7POINT0        AV_CH_LAYOUT_7POINT0
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#define CH_LAYOUT_7POINT1        AV_CH_LAYOUT_7POINT1
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#define CH_LAYOUT_7POINT1_WIDE   AV_CH_LAYOUT_7POINT1_WIDE
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#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
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#endif
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/* in bytes */
442
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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444
/**
445
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
446
 * This is mainly needed because some optimized bitstream readers read
447
 * 32 or 64 bit at once and could read over the end.<br>
448
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
449
 * MPEG bitstreams could cause overread and segfault.
450
 */
451
#define FF_INPUT_BUFFER_PADDING_SIZE 8
452

    
453
/**
454
 * minimum encoding buffer size
455
 * Used to avoid some checks during header writing.
456
 */
457
#define FF_MIN_BUFFER_SIZE 16384
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459

    
460
/**
461
 * motion estimation type.
462
 */
463
enum Motion_Est_ID {
464
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
465
    ME_FULL,
466
    ME_LOG,
467
    ME_PHODS,
468
    ME_EPZS,        ///< enhanced predictive zonal search
469
    ME_X1,          ///< reserved for experiments
470
    ME_HEX,         ///< hexagon based search
471
    ME_UMH,         ///< uneven multi-hexagon search
472
    ME_ITER,        ///< iterative search
473
    ME_TESA,        ///< transformed exhaustive search algorithm
474
};
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476
enum AVDiscard{
477
    /* We leave some space between them for extensions (drop some
478
     * keyframes for intra-only or drop just some bidir frames). */
479
    AVDISCARD_NONE   =-16, ///< discard nothing
480
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
481
    AVDISCARD_NONREF =  8, ///< discard all non reference
482
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
483
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
484
    AVDISCARD_ALL    = 48, ///< discard all
485
};
486

    
487
enum AVColorPrimaries{
488
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
489
    AVCOL_PRI_UNSPECIFIED=2,
490
    AVCOL_PRI_BT470M     =4,
491
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
492
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
493
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
494
    AVCOL_PRI_FILM       =8,
495
    AVCOL_PRI_NB           , ///< Not part of ABI
496
};
497

    
498
enum AVColorTransferCharacteristic{
499
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
500
    AVCOL_TRC_UNSPECIFIED=2,
501
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
502
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
503
    AVCOL_TRC_NB           , ///< Not part of ABI
504
};
505

    
506
enum AVColorSpace{
507
    AVCOL_SPC_RGB        =0,
508
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
509
    AVCOL_SPC_UNSPECIFIED=2,
510
    AVCOL_SPC_FCC        =4,
511
    AVCOL_SPC_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
512
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
513
    AVCOL_SPC_SMPTE240M  =7,
514
    AVCOL_SPC_NB           , ///< Not part of ABI
515
};
516

    
517
enum AVColorRange{
518
    AVCOL_RANGE_UNSPECIFIED=0,
519
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
520
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
521
    AVCOL_RANGE_NB           , ///< Not part of ABI
522
};
523

    
524
/**
525
 *  X   X      3 4 X      X are luma samples,
526
 *             1 2        1-6 are possible chroma positions
527
 *  X   X      5 6 X      0 is undefined/unknown position
528
 */
529
enum AVChromaLocation{
530
    AVCHROMA_LOC_UNSPECIFIED=0,
531
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
532
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
533
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
534
    AVCHROMA_LOC_TOP        =4,
535
    AVCHROMA_LOC_BOTTOMLEFT =5,
536
    AVCHROMA_LOC_BOTTOM     =6,
537
    AVCHROMA_LOC_NB           , ///< Not part of ABI
538
};
539

    
540
/**
541
 * LPC analysis type
542
 */
543
enum AVLPCType {
544
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
545
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
546
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
547
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
548
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
549
    AV_LPC_TYPE_NB              , ///< Not part of ABI
550
};
551

    
552
enum AVAudioServiceType {
553
    AV_AUDIO_SERVICE_TYPE_MAIN              = 0,
554
    AV_AUDIO_SERVICE_TYPE_EFFECTS           = 1,
555
    AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
556
    AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED  = 3,
557
    AV_AUDIO_SERVICE_TYPE_DIALOGUE          = 4,
558
    AV_AUDIO_SERVICE_TYPE_COMMENTARY        = 5,
559
    AV_AUDIO_SERVICE_TYPE_EMERGENCY         = 6,
560
    AV_AUDIO_SERVICE_TYPE_VOICE_OVER        = 7,
561
    AV_AUDIO_SERVICE_TYPE_KARAOKE           = 8,
562
    AV_AUDIO_SERVICE_TYPE_NB                   , ///< Not part of ABI
563
};
564

    
565
typedef struct RcOverride{
566
    int start_frame;
567
    int end_frame;
568
    int qscale; // If this is 0 then quality_factor will be used instead.
569
    float quality_factor;
570
} RcOverride;
571

    
572
#define FF_MAX_B_FRAMES 16
573

    
574
/* encoding support
575
   These flags can be passed in AVCodecContext.flags before initialization.
576
   Note: Not everything is supported yet.
577
*/
578

    
579
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
580
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
581
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
582
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
583
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
584
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
585
/**
586
 * The parent program guarantees that the input for B-frames containing
587
 * streams is not written to for at least s->max_b_frames+1 frames, if
588
 * this is not set the input will be copied.
589
 */
590
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
591
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
592
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
593
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
594
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
595
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
596
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
597
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
598
                                                  location instead of only at frame boundaries. */
599
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
600
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
601
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
602
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
603
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
604
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
605
/* Fx : Flag for h263+ extra options */
606
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
607
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
608
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
609
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
610
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
611
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
612
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
613
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
614
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
615
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
616
#define CODEC_FLAG_CLOSED_GOP     0x80000000
617
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
618
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
619
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
620
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
621
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
622
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
623
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
624
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
625
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
626
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
627
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
628
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
629
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
630
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
631
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
632
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
633
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
634
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
635
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
636
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
637
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
638
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
639

    
640
/* Unsupported options :
641
 *              Syntax Arithmetic coding (SAC)
642
 *              Reference Picture Selection
643
 *              Independent Segment Decoding */
644
/* /Fx */
645
/* codec capabilities */
646

    
647
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
648
/**
649
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
650
 * If not set, it might not use get_buffer() at all or use operations that
651
 * assume the buffer was allocated by avcodec_default_get_buffer.
652
 */
653
#define CODEC_CAP_DR1             0x0002
654
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
655
#define CODEC_CAP_PARSE_ONLY      0x0004
656
#define CODEC_CAP_TRUNCATED       0x0008
657
/* Codec can export data for HW decoding (XvMC). */
658
#define CODEC_CAP_HWACCEL         0x0010
659
/**
660
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
661
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
662
 */
663
#define CODEC_CAP_DELAY           0x0020
664
/**
665
 * Codec can be fed a final frame with a smaller size.
666
 * This can be used to prevent truncation of the last audio samples.
667
 */
668
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
669
/**
670
 * Codec can export data for HW decoding (VDPAU).
671
 */
672
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
673
/**
674
 * Codec can output multiple frames per AVPacket
675
 * Normally demuxers return one frame at a time, demuxers which do not do
676
 * are connected to a parser to split what they return into proper frames.
677
 * This flag is reserved to the very rare category of codecs which have a
678
 * bitstream that cannot be split into frames without timeconsuming
679
 * operations like full decoding. Demuxers carring such bitstreams thus
680
 * may return multiple frames in a packet. This has many disadvantages like
681
 * prohibiting stream copy in many cases thus it should only be considered
682
 * as a last resort.
683
 */
684
#define CODEC_CAP_SUBFRAMES        0x0100
685
/**
686
 * Codec is experimental and is thus avoided in favor of non experimental
687
 * encoders
688
 */
689
#define CODEC_CAP_EXPERIMENTAL     0x0200
690
/**
691
 * Codec should fill in channel configuration and samplerate instead of container
692
 */
693
#define CODEC_CAP_CHANNEL_CONF     0x0400
694

    
695
/**
696
 * Codec is able to deal with negative linesizes
697
 */
698
#define CODEC_CAP_NEG_LINESIZES    0x0800
699

    
700
/**
701
 * Codec supports frame-level multithreading.
702
 */
703
#define CODEC_CAP_FRAME_THREADS    0x1000
704
/**
705
 * Codec supports slice-based (or partition-based) multithreading.
706
 */
707
#define CODEC_CAP_SLICE_THREADS    0x2000
708

    
709
//The following defines may change, don't expect compatibility if you use them.
710
#define MB_TYPE_INTRA4x4   0x0001
711
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
712
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
713
#define MB_TYPE_16x16      0x0008
714
#define MB_TYPE_16x8       0x0010
715
#define MB_TYPE_8x16       0x0020
716
#define MB_TYPE_8x8        0x0040
717
#define MB_TYPE_INTERLACED 0x0080
718
#define MB_TYPE_DIRECT2    0x0100 //FIXME
719
#define MB_TYPE_ACPRED     0x0200
720
#define MB_TYPE_GMC        0x0400
721
#define MB_TYPE_SKIP       0x0800
722
#define MB_TYPE_P0L0       0x1000
723
#define MB_TYPE_P1L0       0x2000
724
#define MB_TYPE_P0L1       0x4000
725
#define MB_TYPE_P1L1       0x8000
726
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
727
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
728
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
729
#define MB_TYPE_QUANT      0x00010000
730
#define MB_TYPE_CBP        0x00020000
731
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
732

    
733
/**
734
 * Pan Scan area.
735
 * This specifies the area which should be displayed.
736
 * Note there may be multiple such areas for one frame.
737
 */
738
typedef struct AVPanScan{
739
    /**
740
     * id
741
     * - encoding: Set by user.
742
     * - decoding: Set by libavcodec.
743
     */
744
    int id;
745

    
746
    /**
747
     * width and height in 1/16 pel
748
     * - encoding: Set by user.
749
     * - decoding: Set by libavcodec.
750
     */
751
    int width;
752
    int height;
753

    
754
    /**
755
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
756
     * - encoding: Set by user.
757
     * - decoding: Set by libavcodec.
758
     */
759
    int16_t position[3][2];
760
}AVPanScan;
761

    
762
#define FF_COMMON_FRAME \
763
    /**\
764
     * pointer to the picture planes.\
765
     * This might be different from the first allocated byte\
766
     * - encoding: \
767
     * - decoding: \
768
     */\
769
    uint8_t *data[4];\
770
    int linesize[4];\
771
    /**\
772
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
773
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
774
     * - encoding: \
775
     * - decoding: \
776
     */\
777
    uint8_t *base[4];\
778
    /**\
779
     * 1 -> keyframe, 0-> not\
780
     * - encoding: Set by libavcodec.\
781
     * - decoding: Set by libavcodec.\
782
     */\
783
    int key_frame;\
784
\
785
    /**\
786
     * Picture type of the frame, see ?_TYPE below.\
787
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
788
     * - decoding: Set by libavcodec.\
789
     */\
790
    enum AVPictureType pict_type;\
791
\
792
    /**\
793
     * presentation timestamp in time_base units (time when frame should be shown to user)\
794
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
795
     * - encoding: MUST be set by user.\
796
     * - decoding: Set by libavcodec.\
797
     */\
798
    int64_t pts;\
799
\
800
    /**\
801
     * picture number in bitstream order\
802
     * - encoding: set by\
803
     * - decoding: Set by libavcodec.\
804
     */\
805
    int coded_picture_number;\
806
    /**\
807
     * picture number in display order\
808
     * - encoding: set by\
809
     * - decoding: Set by libavcodec.\
810
     */\
811
    int display_picture_number;\
812
\
813
    /**\
814
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
815
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
816
     * - decoding: Set by libavcodec.\
817
     */\
818
    int quality; \
819
\
820
    /**\
821
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
822
     * Set to INT_MAX if the buffer has not been used yet.\
823
     * - encoding: unused\
824
     * - decoding: MUST be set by get_buffer().\
825
     */\
826
    int age;\
827
\
828
    /**\
829
     * is this picture used as reference\
830
     * The values for this are the same as the MpegEncContext.picture_structure\
831
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
832
     * Set to 4 for delayed, non-reference frames.\
833
     * - encoding: unused\
834
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
835
     */\
836
    int reference;\
837
\
838
    /**\
839
     * QP table\
840
     * - encoding: unused\
841
     * - decoding: Set by libavcodec.\
842
     */\
843
    int8_t *qscale_table;\
844
    /**\
845
     * QP store stride\
846
     * - encoding: unused\
847
     * - decoding: Set by libavcodec.\
848
     */\
849
    int qstride;\
850
\
851
    /**\
852
     * mbskip_table[mb]>=1 if MB didn't change\
853
     * stride= mb_width = (width+15)>>4\
854
     * - encoding: unused\
855
     * - decoding: Set by libavcodec.\
856
     */\
857
    uint8_t *mbskip_table;\
858
\
859
    /**\
860
     * motion vector table\
861
     * @code\
862
     * example:\
863
     * int mv_sample_log2= 4 - motion_subsample_log2;\
864
     * int mb_width= (width+15)>>4;\
865
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
866
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
867
     * @endcode\
868
     * - encoding: Set by user.\
869
     * - decoding: Set by libavcodec.\
870
     */\
871
    int16_t (*motion_val[2])[2];\
872
\
873
    /**\
874
     * macroblock type table\
875
     * mb_type_base + mb_width + 2\
876
     * - encoding: Set by user.\
877
     * - decoding: Set by libavcodec.\
878
     */\
879
    uint32_t *mb_type;\
880
\
881
    /**\
882
     * log2 of the size of the block which a single vector in motion_val represents: \
883
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
884
     * - encoding: unused\
885
     * - decoding: Set by libavcodec.\
886
     */\
887
    uint8_t motion_subsample_log2;\
888
\
889
    /**\
890
     * for some private data of the user\
891
     * - encoding: unused\
892
     * - decoding: Set by user.\
893
     */\
894
    void *opaque;\
895
\
896
    /**\
897
     * error\
898
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
899
     * - decoding: unused\
900
     */\
901
    uint64_t error[4];\
902
\
903
    /**\
904
     * type of the buffer (to keep track of who has to deallocate data[*])\
905
     * - encoding: Set by the one who allocates it.\
906
     * - decoding: Set by the one who allocates it.\
907
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
908
     */\
909
    int type;\
910
    \
911
    /**\
912
     * When decoding, this signals how much the picture must be delayed.\
913
     * extra_delay = repeat_pict / (2*fps)\
914
     * - encoding: unused\
915
     * - decoding: Set by libavcodec.\
916
     */\
917
    int repeat_pict;\
918
    \
919
    /**\
920
     * \
921
     */\
922
    int qscale_type;\
923
    \
924
    /**\
925
     * The content of the picture is interlaced.\
926
     * - encoding: Set by user.\
927
     * - decoding: Set by libavcodec. (default 0)\
928
     */\
929
    int interlaced_frame;\
930
    \
931
    /**\
932
     * If the content is interlaced, is top field displayed first.\
933
     * - encoding: Set by user.\
934
     * - decoding: Set by libavcodec.\
935
     */\
936
    int top_field_first;\
937
    \
938
    /**\
939
     * Pan scan.\
940
     * - encoding: Set by user.\
941
     * - decoding: Set by libavcodec.\
942
     */\
943
    AVPanScan *pan_scan;\
944
    \
945
    /**\
946
     * Tell user application that palette has changed from previous frame.\
947
     * - encoding: ??? (no palette-enabled encoder yet)\
948
     * - decoding: Set by libavcodec. (default 0).\
949
     */\
950
    int palette_has_changed;\
951
    \
952
    /**\
953
     * codec suggestion on buffer type if != 0\
954
     * - encoding: unused\
955
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
956
     */\
957
    int buffer_hints;\
958
\
959
    /**\
960
     * DCT coefficients\
961
     * - encoding: unused\
962
     * - decoding: Set by libavcodec.\
963
     */\
964
    short *dct_coeff;\
965
\
966
    /**\
967
     * motion reference frame index\
968
     * the order in which these are stored can depend on the codec.\
969
     * - encoding: Set by user.\
970
     * - decoding: Set by libavcodec.\
971
     */\
972
    int8_t *ref_index[2];\
973
\
974
    /**\
975
     * reordered opaque 64bit (generally an integer or a double precision float\
976
     * PTS but can be anything). \
977
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
978
     * that time,\
979
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
980
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
981
     * @deprecated in favor of pkt_pts\
982
     * - encoding: unused\
983
     * - decoding: Read by user.\
984
     */\
985
    int64_t reordered_opaque;\
986
\
987
    /**\
988
     * hardware accelerator private data (FFmpeg allocated)\
989
     * - encoding: unused\
990
     * - decoding: Set by libavcodec\
991
     */\
992
    void *hwaccel_picture_private;\
993
\
994
    /**\
995
     * reordered pts from the last AVPacket that has been input into the decoder\
996
     * - encoding: unused\
997
     * - decoding: Read by user.\
998
     */\
999
    int64_t pkt_pts;\
1000
\
1001
    /**\
1002
     * dts from the last AVPacket that has been input into the decoder\
1003
     * - encoding: unused\
1004
     * - decoding: Read by user.\
1005
     */\
1006
    int64_t pkt_dts;\
1007
\
1008
    /**\
1009
     * the AVCodecContext which ff_thread_get_buffer() was last called on\
1010
     * - encoding: Set by libavcodec.\
1011
     * - decoding: Set by libavcodec.\
1012
     */\
1013
    struct AVCodecContext *owner;\
1014
\
1015
    /**\
1016
     * used by multithreading to store frame-specific info\
1017
     * - encoding: Set by libavcodec.\
1018
     * - decoding: Set by libavcodec.\
1019
     */\
1020
    void *thread_opaque;\
1021
\
1022
    /**\
1023
     * frame timestamp estimated using various heuristics, in stream time base\
1024
     * - encoding: unused\
1025
     * - decoding: set by libavcodec, read by user.\
1026
     */\
1027
    int64_t best_effort_timestamp;\
1028

    
1029

    
1030
#define FF_QSCALE_TYPE_MPEG1 0
1031
#define FF_QSCALE_TYPE_MPEG2 1
1032
#define FF_QSCALE_TYPE_H264  2
1033
#define FF_QSCALE_TYPE_VP56  3
1034

    
1035
#define FF_BUFFER_TYPE_INTERNAL 1
1036
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1037
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1038
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1039

    
1040
#if FF_API_OLD_FF_PICT_TYPES
1041
/* DEPRECATED, directly use the AV_PICTURE_TYPE_* enum values */
1042
#define FF_I_TYPE  AV_PICTURE_TYPE_I  ///< Intra
1043
#define FF_P_TYPE  AV_PICTURE_TYPE_P  ///< Predicted
1044
#define FF_B_TYPE  AV_PICTURE_TYPE_B  ///< Bi-dir predicted
1045
#define FF_S_TYPE  AV_PICTURE_TYPE_S  ///< S(GMC)-VOP MPEG4
1046
#define FF_SI_TYPE AV_PICTURE_TYPE_SI ///< Switching Intra
1047
#define FF_SP_TYPE AV_PICTURE_TYPE_SP ///< Switching Predicted
1048
#define FF_BI_TYPE AV_PICTURE_TYPE_BI
1049
#endif
1050

    
1051
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1052
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1053
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1054
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1055

    
1056
typedef struct AVPacket {
1057
    /**
1058
     * Presentation timestamp in AVStream->time_base units; the time at which
1059
     * the decompressed packet will be presented to the user.
1060
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1061
     * pts MUST be larger or equal to dts as presentation cannot happen before
1062
     * decompression, unless one wants to view hex dumps. Some formats misuse
1063
     * the terms dts and pts/cts to mean something different. Such timestamps
1064
     * must be converted to true pts/dts before they are stored in AVPacket.
1065
     */
1066
    int64_t pts;
1067
    /**
1068
     * Decompression timestamp in AVStream->time_base units; the time at which
1069
     * the packet is decompressed.
1070
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1071
     */
1072
    int64_t dts;
1073
    uint8_t *data;
1074
    int   size;
1075
    int   stream_index;
1076
    int   flags;
1077
    /**
1078
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1079
     * Equals next_pts - this_pts in presentation order.
1080
     */
1081
    int   duration;
1082
    void  (*destruct)(struct AVPacket *);
1083
    void  *priv;
1084
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1085

    
1086
    /**
1087
     * Time difference in AVStream->time_base units from the pts of this
1088
     * packet to the point at which the output from the decoder has converged
1089
     * independent from the availability of previous frames. That is, the
1090
     * frames are virtually identical no matter if decoding started from
1091
     * the very first frame or from this keyframe.
1092
     * Is AV_NOPTS_VALUE if unknown.
1093
     * This field is not the display duration of the current packet.
1094
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1095
     * set.
1096
     *
1097
     * The purpose of this field is to allow seeking in streams that have no
1098
     * keyframes in the conventional sense. It corresponds to the
1099
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1100
     * essential for some types of subtitle streams to ensure that all
1101
     * subtitles are correctly displayed after seeking.
1102
     */
1103
    int64_t convergence_duration;
1104
} AVPacket;
1105
#define AV_PKT_FLAG_KEY   0x0001
1106
#if LIBAVCODEC_VERSION_MAJOR < 53
1107
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1108
#endif
1109

    
1110
/**
1111
 * Audio Video Frame.
1112
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1113
 * bumps.
1114
 * Removal, reordering and changes to existing fields require a major
1115
 * version bump. No fields should be added into AVFrame before or after
1116
 * FF_COMMON_FRAME!
1117
 * sizeof(AVFrame) must not be used outside libav*.
1118
 */
1119
typedef struct AVFrame {
1120
    FF_COMMON_FRAME
1121
} AVFrame;
1122

    
1123
/**
1124
 * main external API structure.
1125
 * New fields can be added to the end with minor version bumps.
1126
 * Removal, reordering and changes to existing fields require a major
1127
 * version bump.
1128
 * sizeof(AVCodecContext) must not be used outside libav*.
1129
 */
1130
typedef struct AVCodecContext {
1131
    /**
1132
     * information on struct for av_log
1133
     * - set by avcodec_alloc_context
1134
     */
1135
    const AVClass *av_class;
1136
    /**
1137
     * the average bitrate
1138
     * - encoding: Set by user; unused for constant quantizer encoding.
1139
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1140
     */
1141
    int bit_rate;
1142

    
1143
    /**
1144
     * number of bits the bitstream is allowed to diverge from the reference.
1145
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1146
     * - encoding: Set by user; unused for constant quantizer encoding.
1147
     * - decoding: unused
1148
     */
1149
    int bit_rate_tolerance;
1150

    
1151
    /**
1152
     * CODEC_FLAG_*.
1153
     * - encoding: Set by user.
1154
     * - decoding: Set by user.
1155
     */
1156
    int flags;
1157

    
1158
    /**
1159
     * Some codecs need additional format info. It is stored here.
1160
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1161
     * specific codec MUST set it correctly otherwise stream copy breaks.
1162
     * In general use of this field by muxers is not recommanded.
1163
     * - encoding: Set by libavcodec.
1164
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1165
     */
1166
    int sub_id;
1167

    
1168
    /**
1169
     * Motion estimation algorithm used for video coding.
1170
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1171
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1172
     * - encoding: MUST be set by user.
1173
     * - decoding: unused
1174
     */
1175
    int me_method;
1176

    
1177
    /**
1178
     * some codecs need / can use extradata like Huffman tables.
1179
     * mjpeg: Huffman tables
1180
     * rv10: additional flags
1181
     * mpeg4: global headers (they can be in the bitstream or here)
1182
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1183
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1184
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1185
     * - encoding: Set/allocated/freed by libavcodec.
1186
     * - decoding: Set/allocated/freed by user.
1187
     */
1188
    uint8_t *extradata;
1189
    int extradata_size;
1190

    
1191
    /**
1192
     * This is the fundamental unit of time (in seconds) in terms
1193
     * of which frame timestamps are represented. For fixed-fps content,
1194
     * timebase should be 1/framerate and timestamp increments should be
1195
     * identically 1.
1196
     * - encoding: MUST be set by user.
1197
     * - decoding: Set by libavcodec.
1198
     */
1199
    AVRational time_base;
1200

    
1201
    /* video only */
1202
    /**
1203
     * picture width / height.
1204
     * - encoding: MUST be set by user.
1205
     * - decoding: Set by libavcodec.
1206
     * Note: For compatibility it is possible to set this instead of
1207
     * coded_width/height before decoding.
1208
     */
1209
    int width, height;
1210

    
1211
#define FF_ASPECT_EXTENDED 15
1212

    
1213
    /**
1214
     * the number of pictures in a group of pictures, or 0 for intra_only
1215
     * - encoding: Set by user.
1216
     * - decoding: unused
1217
     */
1218
    int gop_size;
1219

    
1220
    /**
1221
     * Pixel format, see PIX_FMT_xxx.
1222
     * May be set by the demuxer if known from headers.
1223
     * May be overriden by the decoder if it knows better.
1224
     * - encoding: Set by user.
1225
     * - decoding: Set by user if known, overridden by libavcodec if known
1226
     */
1227
    enum PixelFormat pix_fmt;
1228

    
1229
#if FF_API_RATE_EMU
1230
    /**
1231
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1232
     * has to read frames at native frame rate.
1233
     * - encoding: Set by user.
1234
     * - decoding: unused
1235
     */
1236
    attribute_deprecated int rate_emu;
1237
#endif
1238

    
1239
    /**
1240
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1241
     * decoder to draw a horizontal band. It improves cache usage. Not
1242
     * all codecs can do that. You must check the codec capabilities
1243
     * beforehand.
1244
     * When multithreading is used, it may be called from multiple threads
1245
     * at the same time; threads might draw different parts of the same AVFrame,
1246
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1247
     * in order.
1248
     * The function is also used by hardware acceleration APIs.
1249
     * It is called at least once during frame decoding to pass
1250
     * the data needed for hardware render.
1251
     * In that mode instead of pixel data, AVFrame points to
1252
     * a structure specific to the acceleration API. The application
1253
     * reads the structure and can change some fields to indicate progress
1254
     * or mark state.
1255
     * - encoding: unused
1256
     * - decoding: Set by user.
1257
     * @param height the height of the slice
1258
     * @param y the y position of the slice
1259
     * @param type 1->top field, 2->bottom field, 3->frame
1260
     * @param offset offset into the AVFrame.data from which the slice should be read
1261
     */
1262
    void (*draw_horiz_band)(struct AVCodecContext *s,
1263
                            const AVFrame *src, int offset[4],
1264
                            int y, int type, int height);
1265

    
1266
    /* audio only */
1267
    int sample_rate; ///< samples per second
1268
    int channels;    ///< number of audio channels
1269

    
1270
    /**
1271
     * audio sample format
1272
     * - encoding: Set by user.
1273
     * - decoding: Set by libavcodec.
1274
     */
1275
    enum AVSampleFormat sample_fmt;  ///< sample format
1276

    
1277
    /* The following data should not be initialized. */
1278
    /**
1279
     * Samples per packet, initialized when calling 'init'.
1280
     */
1281
    int frame_size;
1282
    int frame_number;   ///< audio or video frame number
1283
#if LIBAVCODEC_VERSION_MAJOR < 53
1284
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1285
#endif
1286

    
1287
    /**
1288
     * Number of frames the decoded output will be delayed relative to
1289
     * the encoded input.
1290
     * - encoding: Set by libavcodec.
1291
     * - decoding: unused
1292
     */
1293
    int delay;
1294

    
1295
    /* - encoding parameters */
1296
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1297
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1298

    
1299
    /**
1300
     * minimum quantizer
1301
     * - encoding: Set by user.
1302
     * - decoding: unused
1303
     */
1304
    int qmin;
1305

    
1306
    /**
1307
     * maximum quantizer
1308
     * - encoding: Set by user.
1309
     * - decoding: unused
1310
     */
1311
    int qmax;
1312

    
1313
    /**
1314
     * maximum quantizer difference between frames
1315
     * - encoding: Set by user.
1316
     * - decoding: unused
1317
     */
1318
    int max_qdiff;
1319

    
1320
    /**
1321
     * maximum number of B-frames between non-B-frames
1322
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1323
     * - encoding: Set by user.
1324
     * - decoding: unused
1325
     */
1326
    int max_b_frames;
1327

    
1328
    /**
1329
     * qscale factor between IP and B-frames
1330
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1331
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1332
     * - encoding: Set by user.
1333
     * - decoding: unused
1334
     */
1335
    float b_quant_factor;
1336

    
1337
    /** obsolete FIXME remove */
1338
    int rc_strategy;
1339
#define FF_RC_STRATEGY_XVID 1
1340

    
1341
    int b_frame_strategy;
1342

    
1343
    struct AVCodec *codec;
1344

    
1345
    void *priv_data;
1346

    
1347
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1348
                            /* do its best to deliver a chunk with size     */
1349
                            /* below rtp_payload_size, the chunk will start */
1350
                            /* with a start code on some codecs like H.263. */
1351
                            /* This doesn't take account of any particular  */
1352
                            /* headers inside the transmitted RTP payload.  */
1353

    
1354

    
1355
    /* The RTP callback: This function is called    */
1356
    /* every time the encoder has a packet to send. */
1357
    /* It depends on the encoder if the data starts */
1358
    /* with a Start Code (it should). H.263 does.   */
1359
    /* mb_nb contains the number of macroblocks     */
1360
    /* encoded in the RTP payload.                  */
1361
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1362

    
1363
    /* statistics, used for 2-pass encoding */
1364
    int mv_bits;
1365
    int header_bits;
1366
    int i_tex_bits;
1367
    int p_tex_bits;
1368
    int i_count;
1369
    int p_count;
1370
    int skip_count;
1371
    int misc_bits;
1372

    
1373
    /**
1374
     * number of bits used for the previously encoded frame
1375
     * - encoding: Set by libavcodec.
1376
     * - decoding: unused
1377
     */
1378
    int frame_bits;
1379

    
1380
    /**
1381
     * Private data of the user, can be used to carry app specific stuff.
1382
     * - encoding: Set by user.
1383
     * - decoding: Set by user.
1384
     */
1385
    void *opaque;
1386

    
1387
    char codec_name[32];
1388
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1389
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1390

    
1391
    /**
1392
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1393
     * This is used to work around some encoder bugs.
1394
     * A demuxer should set this to what is stored in the field used to identify the codec.
1395
     * If there are multiple such fields in a container then the demuxer should choose the one
1396
     * which maximizes the information about the used codec.
1397
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1398
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1399
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1400
     * first.
1401
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1402
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1403
     */
1404
    unsigned int codec_tag;
1405

    
1406
    /**
1407
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1408
     * - encoding: Set by user
1409
     * - decoding: Set by user
1410
     */
1411
    int workaround_bugs;
1412
#define FF_BUG_AUTODETECT       1  ///< autodetection
1413
#define FF_BUG_OLD_MSMPEG4      2
1414
#define FF_BUG_XVID_ILACE       4
1415
#define FF_BUG_UMP4             8
1416
#define FF_BUG_NO_PADDING       16
1417
#define FF_BUG_AMV              32
1418
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1419
#define FF_BUG_QPEL_CHROMA      64
1420
#define FF_BUG_STD_QPEL         128
1421
#define FF_BUG_QPEL_CHROMA2     256
1422
#define FF_BUG_DIRECT_BLOCKSIZE 512
1423
#define FF_BUG_EDGE             1024
1424
#define FF_BUG_HPEL_CHROMA      2048
1425
#define FF_BUG_DC_CLIP          4096
1426
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1427
#define FF_BUG_TRUNCATED       16384
1428
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1429

    
1430
    /**
1431
     * luma single coefficient elimination threshold
1432
     * - encoding: Set by user.
1433
     * - decoding: unused
1434
     */
1435
    int luma_elim_threshold;
1436

    
1437
    /**
1438
     * chroma single coeff elimination threshold
1439
     * - encoding: Set by user.
1440
     * - decoding: unused
1441
     */
1442
    int chroma_elim_threshold;
1443

    
1444
    /**
1445
     * strictly follow the standard (MPEG4, ...).
1446
     * - encoding: Set by user.
1447
     * - decoding: Set by user.
1448
     * Setting this to STRICT or higher means the encoder and decoder will
1449
     * generally do stupid things, whereas setting it to unofficial or lower
1450
     * will mean the encoder might produce output that is not supported by all
1451
     * spec-compliant decoders. Decoders don't differentiate between normal,
1452
     * unofficial and experimental (that is, they always try to decode things
1453
     * when they can) unless they are explicitly asked to behave stupidly
1454
     * (=strictly conform to the specs)
1455
     */
1456
    int strict_std_compliance;
1457
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1458
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1459
#define FF_COMPLIANCE_NORMAL        0
1460
#if FF_API_INOFFICIAL
1461
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1462
#endif
1463
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1464
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1465

    
1466
    /**
1467
     * qscale offset between IP and B-frames
1468
     * - encoding: Set by user.
1469
     * - decoding: unused
1470
     */
1471
    float b_quant_offset;
1472

    
1473
    /**
1474
     * Error recognization; higher values will detect more errors but may
1475
     * misdetect some more or less valid parts as errors.
1476
     * - encoding: unused
1477
     * - decoding: Set by user.
1478
     */
1479
    int error_recognition;
1480
#define FF_ER_CAREFUL         1
1481
#define FF_ER_COMPLIANT       2
1482
#define FF_ER_AGGRESSIVE      3
1483
#define FF_ER_VERY_AGGRESSIVE 4
1484

    
1485
    /**
1486
     * Called at the beginning of each frame to get a buffer for it.
1487
     * If pic.reference is set then the frame will be read later by libavcodec.
1488
     * avcodec_align_dimensions2() should be used to find the required width and
1489
     * height, as they normally need to be rounded up to the next multiple of 16.
1490
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1491
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1492
     * some other means.
1493
     * If frame multithreading is used and thread_safe_callbacks is set,
1494
     * it may be called from a different thread, but not from more than one at once.
1495
     * Does not need to be reentrant.
1496
     * - encoding: unused
1497
     * - decoding: Set by libavcodec, user can override.
1498
     */
1499
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1500

    
1501
    /**
1502
     * Called to release buffers which were allocated with get_buffer.
1503
     * A released buffer can be reused in get_buffer().
1504
     * pic.data[*] must be set to NULL.
1505
     * May be called from a different thread if frame multithreading is used,
1506
     * but not by more than one thread at once, so does not need to be reentrant.
1507
     * - encoding: unused
1508
     * - decoding: Set by libavcodec, user can override.
1509
     */
1510
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1511

    
1512
    /**
1513
     * Size of the frame reordering buffer in the decoder.
1514
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1515
     * - encoding: Set by libavcodec.
1516
     * - decoding: Set by libavcodec.
1517
     */
1518
    int has_b_frames;
1519

    
1520
    /**
1521
     * number of bytes per packet if constant and known or 0
1522
     * Used by some WAV based audio codecs.
1523
     */
1524
    int block_align;
1525

    
1526
    int parse_only; /* - decoding only: If true, only parsing is done
1527
                       (function avcodec_parse_frame()). The frame
1528
                       data is returned. Only MPEG codecs support this now. */
1529

    
1530
    /**
1531
     * 0-> h263 quant 1-> mpeg quant
1532
     * - encoding: Set by user.
1533
     * - decoding: unused
1534
     */
1535
    int mpeg_quant;
1536

    
1537
    /**
1538
     * pass1 encoding statistics output buffer
1539
     * - encoding: Set by libavcodec.
1540
     * - decoding: unused
1541
     */
1542
    char *stats_out;
1543

    
1544
    /**
1545
     * pass2 encoding statistics input buffer
1546
     * Concatenated stuff from stats_out of pass1 should be placed here.
1547
     * - encoding: Allocated/set/freed by user.
1548
     * - decoding: unused
1549
     */
1550
    char *stats_in;
1551

    
1552
    /**
1553
     * ratecontrol qmin qmax limiting method
1554
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1555
     * - encoding: Set by user.
1556
     * - decoding: unused
1557
     */
1558
    float rc_qsquish;
1559

    
1560
    float rc_qmod_amp;
1561
    int rc_qmod_freq;
1562

    
1563
    /**
1564
     * ratecontrol override, see RcOverride
1565
     * - encoding: Allocated/set/freed by user.
1566
     * - decoding: unused
1567
     */
1568
    RcOverride *rc_override;
1569
    int rc_override_count;
1570

    
1571
    /**
1572
     * rate control equation
1573
     * - encoding: Set by user
1574
     * - decoding: unused
1575
     */
1576
    const char *rc_eq;
1577

    
1578
    /**
1579
     * maximum bitrate
1580
     * - encoding: Set by user.
1581
     * - decoding: unused
1582
     */
1583
    int rc_max_rate;
1584

    
1585
    /**
1586
     * minimum bitrate
1587
     * - encoding: Set by user.
1588
     * - decoding: unused
1589
     */
1590
    int rc_min_rate;
1591

    
1592
    /**
1593
     * decoder bitstream buffer size
1594
     * - encoding: Set by user.
1595
     * - decoding: unused
1596
     */
1597
    int rc_buffer_size;
1598
    float rc_buffer_aggressivity;
1599

    
1600
    /**
1601
     * qscale factor between P and I-frames
1602
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1603
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1604
     * - encoding: Set by user.
1605
     * - decoding: unused
1606
     */
1607
    float i_quant_factor;
1608

    
1609
    /**
1610
     * qscale offset between P and I-frames
1611
     * - encoding: Set by user.
1612
     * - decoding: unused
1613
     */
1614
    float i_quant_offset;
1615

    
1616
    /**
1617
     * initial complexity for pass1 ratecontrol
1618
     * - encoding: Set by user.
1619
     * - decoding: unused
1620
     */
1621
    float rc_initial_cplx;
1622

    
1623
    /**
1624
     * DCT algorithm, see FF_DCT_* below
1625
     * - encoding: Set by user.
1626
     * - decoding: unused
1627
     */
1628
    int dct_algo;
1629
#define FF_DCT_AUTO    0
1630
#define FF_DCT_FASTINT 1
1631
#define FF_DCT_INT     2
1632
#define FF_DCT_MMX     3
1633
#define FF_DCT_MLIB    4
1634
#define FF_DCT_ALTIVEC 5
1635
#define FF_DCT_FAAN    6
1636

    
1637
    /**
1638
     * luminance masking (0-> disabled)
1639
     * - encoding: Set by user.
1640
     * - decoding: unused
1641
     */
1642
    float lumi_masking;
1643

    
1644
    /**
1645
     * temporary complexity masking (0-> disabled)
1646
     * - encoding: Set by user.
1647
     * - decoding: unused
1648
     */
1649
    float temporal_cplx_masking;
1650

    
1651
    /**
1652
     * spatial complexity masking (0-> disabled)
1653
     * - encoding: Set by user.
1654
     * - decoding: unused
1655
     */
1656
    float spatial_cplx_masking;
1657

    
1658
    /**
1659
     * p block masking (0-> disabled)
1660
     * - encoding: Set by user.
1661
     * - decoding: unused
1662
     */
1663
    float p_masking;
1664

    
1665
    /**
1666
     * darkness masking (0-> disabled)
1667
     * - encoding: Set by user.
1668
     * - decoding: unused
1669
     */
1670
    float dark_masking;
1671

    
1672
    /**
1673
     * IDCT algorithm, see FF_IDCT_* below.
1674
     * - encoding: Set by user.
1675
     * - decoding: Set by user.
1676
     */
1677
    int idct_algo;
1678
#define FF_IDCT_AUTO          0
1679
#define FF_IDCT_INT           1
1680
#define FF_IDCT_SIMPLE        2
1681
#define FF_IDCT_SIMPLEMMX     3
1682
#define FF_IDCT_LIBMPEG2MMX   4
1683
#define FF_IDCT_PS2           5
1684
#define FF_IDCT_MLIB          6
1685
#define FF_IDCT_ARM           7
1686
#define FF_IDCT_ALTIVEC       8
1687
#define FF_IDCT_SH4           9
1688
#define FF_IDCT_SIMPLEARM     10
1689
#define FF_IDCT_H264          11
1690
#define FF_IDCT_VP3           12
1691
#define FF_IDCT_IPP           13
1692
#define FF_IDCT_XVIDMMX       14
1693
#define FF_IDCT_CAVS          15
1694
#define FF_IDCT_SIMPLEARMV5TE 16
1695
#define FF_IDCT_SIMPLEARMV6   17
1696
#define FF_IDCT_SIMPLEVIS     18
1697
#define FF_IDCT_WMV2          19
1698
#define FF_IDCT_FAAN          20
1699
#define FF_IDCT_EA            21
1700
#define FF_IDCT_SIMPLENEON    22
1701
#define FF_IDCT_SIMPLEALPHA   23
1702
#define FF_IDCT_BINK          24
1703

    
1704
    /**
1705
     * slice count
1706
     * - encoding: Set by libavcodec.
1707
     * - decoding: Set by user (or 0).
1708
     */
1709
    int slice_count;
1710
    /**
1711
     * slice offsets in the frame in bytes
1712
     * - encoding: Set/allocated by libavcodec.
1713
     * - decoding: Set/allocated by user (or NULL).
1714
     */
1715
    int *slice_offset;
1716

    
1717
    /**
1718
     * error concealment flags
1719
     * - encoding: unused
1720
     * - decoding: Set by user.
1721
     */
1722
    int error_concealment;
1723
#define FF_EC_GUESS_MVS   1
1724
#define FF_EC_DEBLOCK     2
1725

    
1726
    /**
1727
     * dsp_mask could be add used to disable unwanted CPU features
1728
     * CPU features (i.e. MMX, SSE. ...)
1729
     *
1730
     * With the FORCE flag you may instead enable given CPU features.
1731
     * (Dangerous: Usable in case of misdetection, improper usage however will
1732
     * result into program crash.)
1733
     */
1734
    unsigned dsp_mask;
1735

    
1736
#if FF_API_MM_FLAGS
1737
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1738
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1739
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1740
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1741
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1742
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1743
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1744
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1745
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1746
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1747
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1748
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1749
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1750
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1751
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1752
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1753
#endif
1754

    
1755
    /**
1756
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1757
     * - encoding: Set by libavcodec.
1758
     * - decoding: Set by user.
1759
     */
1760
     int bits_per_coded_sample;
1761

    
1762
    /**
1763
     * prediction method (needed for huffyuv)
1764
     * - encoding: Set by user.
1765
     * - decoding: unused
1766
     */
1767
     int prediction_method;
1768
#define FF_PRED_LEFT   0
1769
#define FF_PRED_PLANE  1
1770
#define FF_PRED_MEDIAN 2
1771

    
1772
    /**
1773
     * sample aspect ratio (0 if unknown)
1774
     * That is the width of a pixel divided by the height of the pixel.
1775
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1776
     * - encoding: Set by user.
1777
     * - decoding: Set by libavcodec.
1778
     */
1779
    AVRational sample_aspect_ratio;
1780

    
1781
    /**
1782
     * the picture in the bitstream
1783
     * - encoding: Set by libavcodec.
1784
     * - decoding: Set by libavcodec.
1785
     */
1786
    AVFrame *coded_frame;
1787

    
1788
    /**
1789
     * debug
1790
     * - encoding: Set by user.
1791
     * - decoding: Set by user.
1792
     */
1793
    int debug;
1794
#define FF_DEBUG_PICT_INFO   1
1795
#define FF_DEBUG_RC          2
1796
#define FF_DEBUG_BITSTREAM   4
1797
#define FF_DEBUG_MB_TYPE     8
1798
#define FF_DEBUG_QP          16
1799
#define FF_DEBUG_MV          32
1800
#define FF_DEBUG_DCT_COEFF   0x00000040
1801
#define FF_DEBUG_SKIP        0x00000080
1802
#define FF_DEBUG_STARTCODE   0x00000100
1803
#define FF_DEBUG_PTS         0x00000200
1804
#define FF_DEBUG_ER          0x00000400
1805
#define FF_DEBUG_MMCO        0x00000800
1806
#define FF_DEBUG_BUGS        0x00001000
1807
#define FF_DEBUG_VIS_QP      0x00002000
1808
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1809
#define FF_DEBUG_BUFFERS     0x00008000
1810
#define FF_DEBUG_THREADS     0x00010000
1811

    
1812
    /**
1813
     * debug
1814
     * - encoding: Set by user.
1815
     * - decoding: Set by user.
1816
     */
1817
    int debug_mv;
1818
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1819
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1820
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1821

    
1822
    /**
1823
     * error
1824
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1825
     * - decoding: unused
1826
     */
1827
    uint64_t error[4];
1828

    
1829
#if FF_API_MB_Q
1830
    /**
1831
     * minimum MB quantizer
1832
     * - encoding: unused
1833
     * - decoding: unused
1834
     */
1835
    attribute_deprecated int mb_qmin;
1836

    
1837
    /**
1838
     * maximum MB quantizer
1839
     * - encoding: unused
1840
     * - decoding: unused
1841
     */
1842
    attribute_deprecated int mb_qmax;
1843
#endif
1844

    
1845
    /**
1846
     * motion estimation comparison function
1847
     * - encoding: Set by user.
1848
     * - decoding: unused
1849
     */
1850
    int me_cmp;
1851
    /**
1852
     * subpixel motion estimation comparison function
1853
     * - encoding: Set by user.
1854
     * - decoding: unused
1855
     */
1856
    int me_sub_cmp;
1857
    /**
1858
     * macroblock comparison function (not supported yet)
1859
     * - encoding: Set by user.
1860
     * - decoding: unused
1861
     */
1862
    int mb_cmp;
1863
    /**
1864
     * interlaced DCT comparison function
1865
     * - encoding: Set by user.
1866
     * - decoding: unused
1867
     */
1868
    int ildct_cmp;
1869
#define FF_CMP_SAD    0
1870
#define FF_CMP_SSE    1
1871
#define FF_CMP_SATD   2
1872
#define FF_CMP_DCT    3
1873
#define FF_CMP_PSNR   4
1874
#define FF_CMP_BIT    5
1875
#define FF_CMP_RD     6
1876
#define FF_CMP_ZERO   7
1877
#define FF_CMP_VSAD   8
1878
#define FF_CMP_VSSE   9
1879
#define FF_CMP_NSSE   10
1880
#define FF_CMP_W53    11
1881
#define FF_CMP_W97    12
1882
#define FF_CMP_DCTMAX 13
1883
#define FF_CMP_DCT264 14
1884
#define FF_CMP_CHROMA 256
1885

    
1886
    /**
1887
     * ME diamond size & shape
1888
     * - encoding: Set by user.
1889
     * - decoding: unused
1890
     */
1891
    int dia_size;
1892

    
1893
    /**
1894
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1895
     * - encoding: Set by user.
1896
     * - decoding: unused
1897
     */
1898
    int last_predictor_count;
1899

    
1900
    /**
1901
     * prepass for motion estimation
1902
     * - encoding: Set by user.
1903
     * - decoding: unused
1904
     */
1905
    int pre_me;
1906

    
1907
    /**
1908
     * motion estimation prepass comparison function
1909
     * - encoding: Set by user.
1910
     * - decoding: unused
1911
     */
1912
    int me_pre_cmp;
1913

    
1914
    /**
1915
     * ME prepass diamond size & shape
1916
     * - encoding: Set by user.
1917
     * - decoding: unused
1918
     */
1919
    int pre_dia_size;
1920

    
1921
    /**
1922
     * subpel ME quality
1923
     * - encoding: Set by user.
1924
     * - decoding: unused
1925
     */
1926
    int me_subpel_quality;
1927

    
1928
    /**
1929
     * callback to negotiate the pixelFormat
1930
     * @param fmt is the list of formats which are supported by the codec,
1931
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1932
     * The first is always the native one.
1933
     * @return the chosen format
1934
     * - encoding: unused
1935
     * - decoding: Set by user, if not set the native format will be chosen.
1936
     */
1937
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1938

    
1939
    /**
1940
     * DTG active format information (additional aspect ratio
1941
     * information only used in DVB MPEG-2 transport streams)
1942
     * 0 if not set.
1943
     *
1944
     * - encoding: unused
1945
     * - decoding: Set by decoder.
1946
     */
1947
    int dtg_active_format;
1948
#define FF_DTG_AFD_SAME         8
1949
#define FF_DTG_AFD_4_3          9
1950
#define FF_DTG_AFD_16_9         10
1951
#define FF_DTG_AFD_14_9         11
1952
#define FF_DTG_AFD_4_3_SP_14_9  13
1953
#define FF_DTG_AFD_16_9_SP_14_9 14
1954
#define FF_DTG_AFD_SP_4_3       15
1955

    
1956
    /**
1957
     * maximum motion estimation search range in subpel units
1958
     * If 0 then no limit.
1959
     *
1960
     * - encoding: Set by user.
1961
     * - decoding: unused
1962
     */
1963
    int me_range;
1964

    
1965
    /**
1966
     * intra quantizer bias
1967
     * - encoding: Set by user.
1968
     * - decoding: unused
1969
     */
1970
    int intra_quant_bias;
1971
#define FF_DEFAULT_QUANT_BIAS 999999
1972

    
1973
    /**
1974
     * inter quantizer bias
1975
     * - encoding: Set by user.
1976
     * - decoding: unused
1977
     */
1978
    int inter_quant_bias;
1979

    
1980
    /**
1981
     * color table ID
1982
     * - encoding: unused
1983
     * - decoding: Which clrtable should be used for 8bit RGB images.
1984
     *             Tables have to be stored somewhere. FIXME
1985
     */
1986
    int color_table_id;
1987

    
1988
    /**
1989
     * internal_buffer count
1990
     * Don't touch, used by libavcodec default_get_buffer().
1991
     */
1992
    int internal_buffer_count;
1993

    
1994
    /**
1995
     * internal_buffers
1996
     * Don't touch, used by libavcodec default_get_buffer().
1997
     */
1998
    void *internal_buffer;
1999

    
2000
    /**
2001
     * Global quality for codecs which cannot change it per frame.
2002
     * This should be proportional to MPEG-1/2/4 qscale.
2003
     * - encoding: Set by user.
2004
     * - decoding: unused
2005
     */
2006
    int global_quality;
2007

    
2008
#define FF_CODER_TYPE_VLC       0
2009
#define FF_CODER_TYPE_AC        1
2010
#define FF_CODER_TYPE_RAW       2
2011
#define FF_CODER_TYPE_RLE       3
2012
#define FF_CODER_TYPE_DEFLATE   4
2013
    /**
2014
     * coder type
2015
     * - encoding: Set by user.
2016
     * - decoding: unused
2017
     */
2018
    int coder_type;
2019

    
2020
    /**
2021
     * context model
2022
     * - encoding: Set by user.
2023
     * - decoding: unused
2024
     */
2025
    int context_model;
2026
#if 0
2027
    /**
2028
     *
2029
     * - encoding: unused
2030
     * - decoding: Set by user.
2031
     */
2032
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2033
#endif
2034

    
2035
    /**
2036
     * slice flags
2037
     * - encoding: unused
2038
     * - decoding: Set by user.
2039
     */
2040
    int slice_flags;
2041
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2042
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2043
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2044

    
2045
    /**
2046
     * XVideo Motion Acceleration
2047
     * - encoding: forbidden
2048
     * - decoding: set by decoder
2049
     */
2050
    int xvmc_acceleration;
2051

    
2052
    /**
2053
     * macroblock decision mode
2054
     * - encoding: Set by user.
2055
     * - decoding: unused
2056
     */
2057
    int mb_decision;
2058
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2059
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2060
#define FF_MB_DECISION_RD     2        ///< rate distortion
2061

    
2062
    /**
2063
     * custom intra quantization matrix
2064
     * - encoding: Set by user, can be NULL.
2065
     * - decoding: Set by libavcodec.
2066
     */
2067
    uint16_t *intra_matrix;
2068

    
2069
    /**
2070
     * custom inter quantization matrix
2071
     * - encoding: Set by user, can be NULL.
2072
     * - decoding: Set by libavcodec.
2073
     */
2074
    uint16_t *inter_matrix;
2075

    
2076
    /**
2077
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2078
     * This is used to work around some encoder bugs.
2079
     * - encoding: unused
2080
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2081
     */
2082
    unsigned int stream_codec_tag;
2083

    
2084
    /**
2085
     * scene change detection threshold
2086
     * 0 is default, larger means fewer detected scene changes.
2087
     * - encoding: Set by user.
2088
     * - decoding: unused
2089
     */
2090
    int scenechange_threshold;
2091

    
2092
    /**
2093
     * minimum Lagrange multipler
2094
     * - encoding: Set by user.
2095
     * - decoding: unused
2096
     */
2097
    int lmin;
2098

    
2099
    /**
2100
     * maximum Lagrange multipler
2101
     * - encoding: Set by user.
2102
     * - decoding: unused
2103
     */
2104
    int lmax;
2105

    
2106
#if FF_API_PALETTE_CONTROL
2107
    /**
2108
     * palette control structure
2109
     * - encoding: ??? (no palette-enabled encoder yet)
2110
     * - decoding: Set by user.
2111
     */
2112
    struct AVPaletteControl *palctrl;
2113
#endif
2114

    
2115
    /**
2116
     * noise reduction strength
2117
     * - encoding: Set by user.
2118
     * - decoding: unused
2119
     */
2120
    int noise_reduction;
2121

    
2122
    /**
2123
     * Called at the beginning of a frame to get cr buffer for it.
2124
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2125
     * libavcodec will pass previous buffer in pic, function should return
2126
     * same buffer or new buffer with old frame "painted" into it.
2127
     * If pic.data[0] == NULL must behave like get_buffer().
2128
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2129
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2130
     * some other means.
2131
     * - encoding: unused
2132
     * - decoding: Set by libavcodec, user can override.
2133
     */
2134
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2135

    
2136
    /**
2137
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2138
     * - encoding: Set by user.
2139
     * - decoding: unused
2140
     */
2141
    int rc_initial_buffer_occupancy;
2142

    
2143
    /**
2144
     *
2145
     * - encoding: Set by user.
2146
     * - decoding: unused
2147
     */
2148
    int inter_threshold;
2149

    
2150
    /**
2151
     * CODEC_FLAG2_*
2152
     * - encoding: Set by user.
2153
     * - decoding: Set by user.
2154
     */
2155
    int flags2;
2156

    
2157
    /**
2158
     * Simulates errors in the bitstream to test error concealment.
2159
     * - encoding: Set by user.
2160
     * - decoding: unused
2161
     */
2162
    int error_rate;
2163

    
2164
#if FF_API_ANTIALIAS_ALGO
2165
    /**
2166
     * MP3 antialias algorithm, see FF_AA_* below.
2167
     * - encoding: unused
2168
     * - decoding: Set by user.
2169
     */
2170
    attribute_deprecated int antialias_algo;
2171
#define FF_AA_AUTO    0
2172
#define FF_AA_FASTINT 1 //not implemented yet
2173
#define FF_AA_INT     2
2174
#define FF_AA_FLOAT   3
2175
#endif
2176

    
2177
    /**
2178
     * quantizer noise shaping
2179
     * - encoding: Set by user.
2180
     * - decoding: unused
2181
     */
2182
    int quantizer_noise_shaping;
2183

    
2184
    /**
2185
     * thread count
2186
     * is used to decide how many independent tasks should be passed to execute()
2187
     * - encoding: Set by user.
2188
     * - decoding: Set by user.
2189
     */
2190
    int thread_count;
2191

    
2192
    /**
2193
     * The codec may call this to execute several independent things.
2194
     * It will return only after finishing all tasks.
2195
     * The user may replace this with some multithreaded implementation,
2196
     * the default implementation will execute the parts serially.
2197
     * @param count the number of things to execute
2198
     * - encoding: Set by libavcodec, user can override.
2199
     * - decoding: Set by libavcodec, user can override.
2200
     */
2201
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2202

    
2203
    /**
2204
     * thread opaque
2205
     * Can be used by execute() to store some per AVCodecContext stuff.
2206
     * - encoding: set by execute()
2207
     * - decoding: set by execute()
2208
     */
2209
    void *thread_opaque;
2210

    
2211
    /**
2212
     * Motion estimation threshold below which no motion estimation is
2213
     * performed, but instead the user specified motion vectors are used.
2214
     *
2215
     * - encoding: Set by user.
2216
     * - decoding: unused
2217
     */
2218
     int me_threshold;
2219

    
2220
    /**
2221
     * Macroblock threshold below which the user specified macroblock types will be used.
2222
     * - encoding: Set by user.
2223
     * - decoding: unused
2224
     */
2225
     int mb_threshold;
2226

    
2227
    /**
2228
     * precision of the intra DC coefficient - 8
2229
     * - encoding: Set by user.
2230
     * - decoding: unused
2231
     */
2232
     int intra_dc_precision;
2233

    
2234
    /**
2235
     * noise vs. sse weight for the nsse comparsion function
2236
     * - encoding: Set by user.
2237
     * - decoding: unused
2238
     */
2239
     int nsse_weight;
2240

    
2241
    /**
2242
     * Number of macroblock rows at the top which are skipped.
2243
     * - encoding: unused
2244
     * - decoding: Set by user.
2245
     */
2246
     int skip_top;
2247

    
2248
    /**
2249
     * Number of macroblock rows at the bottom which are skipped.
2250
     * - encoding: unused
2251
     * - decoding: Set by user.
2252
     */
2253
     int skip_bottom;
2254

    
2255
    /**
2256
     * profile
2257
     * - encoding: Set by user.
2258
     * - decoding: Set by libavcodec.
2259
     */
2260
     int profile;
2261
#define FF_PROFILE_UNKNOWN -99
2262
#define FF_PROFILE_RESERVED -100
2263

    
2264
#define FF_PROFILE_AAC_MAIN 0
2265
#define FF_PROFILE_AAC_LOW  1
2266
#define FF_PROFILE_AAC_SSR  2
2267
#define FF_PROFILE_AAC_LTP  3
2268

    
2269
#define FF_PROFILE_DTS         20
2270
#define FF_PROFILE_DTS_ES      30
2271
#define FF_PROFILE_DTS_96_24   40
2272
#define FF_PROFILE_DTS_HD_HRA  50
2273
#define FF_PROFILE_DTS_HD_MA   60
2274

    
2275
#define FF_PROFILE_MPEG2_422    0
2276
#define FF_PROFILE_MPEG2_HIGH   1
2277
#define FF_PROFILE_MPEG2_SS     2
2278
#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
2279
#define FF_PROFILE_MPEG2_MAIN   4
2280
#define FF_PROFILE_MPEG2_SIMPLE 5
2281

    
2282
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2283
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2284

    
2285
#define FF_PROFILE_H264_BASELINE             66
2286
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2287
#define FF_PROFILE_H264_MAIN                 77
2288
#define FF_PROFILE_H264_EXTENDED             88
2289
#define FF_PROFILE_H264_HIGH                 100
2290
#define FF_PROFILE_H264_HIGH_10              110
2291
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2292
#define FF_PROFILE_H264_HIGH_422             122
2293
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2294
#define FF_PROFILE_H264_HIGH_444             144
2295
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2296
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2297
#define FF_PROFILE_H264_CAVLC_444            44
2298

    
2299
#define FF_PROFILE_VC1_SIMPLE   0
2300
#define FF_PROFILE_VC1_MAIN     1
2301
#define FF_PROFILE_VC1_COMPLEX  2
2302
#define FF_PROFILE_VC1_ADVANCED 3
2303

    
2304
    /**
2305
     * level
2306
     * - encoding: Set by user.
2307
     * - decoding: Set by libavcodec.
2308
     */
2309
     int level;
2310
#define FF_LEVEL_UNKNOWN -99
2311

    
2312
    /**
2313
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2314
     * - encoding: unused
2315
     * - decoding: Set by user.
2316
     */
2317
     int lowres;
2318

    
2319
    /**
2320
     * Bitstream width / height, may be different from width/height if lowres
2321
     * or other things are used.
2322
     * - encoding: unused
2323
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2324
     */
2325
    int coded_width, coded_height;
2326

    
2327
    /**
2328
     * frame skip threshold
2329
     * - encoding: Set by user.
2330
     * - decoding: unused
2331
     */
2332
    int frame_skip_threshold;
2333

    
2334
    /**
2335
     * frame skip factor
2336
     * - encoding: Set by user.
2337
     * - decoding: unused
2338
     */
2339
    int frame_skip_factor;
2340

    
2341
    /**
2342
     * frame skip exponent
2343
     * - encoding: Set by user.
2344
     * - decoding: unused
2345
     */
2346
    int frame_skip_exp;
2347

    
2348
    /**
2349
     * frame skip comparison function
2350
     * - encoding: Set by user.
2351
     * - decoding: unused
2352
     */
2353
    int frame_skip_cmp;
2354

    
2355
    /**
2356
     * Border processing masking, raises the quantizer for mbs on the borders
2357
     * of the picture.
2358
     * - encoding: Set by user.
2359
     * - decoding: unused
2360
     */
2361
    float border_masking;
2362

    
2363
    /**
2364
     * minimum MB lagrange multipler
2365
     * - encoding: Set by user.
2366
     * - decoding: unused
2367
     */
2368
    int mb_lmin;
2369

    
2370
    /**
2371
     * maximum MB lagrange multipler
2372
     * - encoding: Set by user.
2373
     * - decoding: unused
2374
     */
2375
    int mb_lmax;
2376

    
2377
    /**
2378
     *
2379
     * - encoding: Set by user.
2380
     * - decoding: unused
2381
     */
2382
    int me_penalty_compensation;
2383

    
2384
    /**
2385
     *
2386
     * - encoding: unused
2387
     * - decoding: Set by user.
2388
     */
2389
    enum AVDiscard skip_loop_filter;
2390

    
2391
    /**
2392
     *
2393
     * - encoding: unused
2394
     * - decoding: Set by user.
2395
     */
2396
    enum AVDiscard skip_idct;
2397

    
2398
    /**
2399
     *
2400
     * - encoding: unused
2401
     * - decoding: Set by user.
2402
     */
2403
    enum AVDiscard skip_frame;
2404

    
2405
    /**
2406
     *
2407
     * - encoding: Set by user.
2408
     * - decoding: unused
2409
     */
2410
    int bidir_refine;
2411

    
2412
    /**
2413
     *
2414
     * - encoding: Set by user.
2415
     * - decoding: unused
2416
     */
2417
    int brd_scale;
2418

    
2419
    /**
2420
     * constant rate factor - quality-based VBR - values ~correspond to qps
2421
     * - encoding: Set by user.
2422
     * - decoding: unused
2423
     */
2424
    float crf;
2425

    
2426
    /**
2427
     * constant quantization parameter rate control method
2428
     * - encoding: Set by user.
2429
     * - decoding: unused
2430
     */
2431
    int cqp;
2432

    
2433
    /**
2434
     * minimum GOP size
2435
     * - encoding: Set by user.
2436
     * - decoding: unused
2437
     */
2438
    int keyint_min;
2439

    
2440
    /**
2441
     * number of reference frames
2442
     * - encoding: Set by user.
2443
     * - decoding: Set by lavc.
2444
     */
2445
    int refs;
2446

    
2447
    /**
2448
     * chroma qp offset from luma
2449
     * - encoding: Set by user.
2450
     * - decoding: unused
2451
     */
2452
    int chromaoffset;
2453

    
2454
    /**
2455
     * Influences how often B-frames are used.
2456
     * - encoding: Set by user.
2457
     * - decoding: unused
2458
     */
2459
    int bframebias;
2460

    
2461
    /**
2462
     * trellis RD quantization
2463
     * - encoding: Set by user.
2464
     * - decoding: unused
2465
     */
2466
    int trellis;
2467

    
2468
    /**
2469
     * Reduce fluctuations in qp (before curve compression).
2470
     * - encoding: Set by user.
2471
     * - decoding: unused
2472
     */
2473
    float complexityblur;
2474

    
2475
    /**
2476
     * in-loop deblocking filter alphac0 parameter
2477
     * alpha is in the range -6...6
2478
     * - encoding: Set by user.
2479
     * - decoding: unused
2480
     */
2481
    int deblockalpha;
2482

    
2483
    /**
2484
     * in-loop deblocking filter beta parameter
2485
     * beta is in the range -6...6
2486
     * - encoding: Set by user.
2487
     * - decoding: unused
2488
     */
2489
    int deblockbeta;
2490

    
2491
    /**
2492
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2493
     * - encoding: Set by user.
2494
     * - decoding: unused
2495
     */
2496
    int partitions;
2497
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2498
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2499
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2500
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2501
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2502

    
2503
    /**
2504
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2505
     * - encoding: Set by user.
2506
     * - decoding: unused
2507
     */
2508
    int directpred;
2509

    
2510
    /**
2511
     * Audio cutoff bandwidth (0 means "automatic")
2512
     * - encoding: Set by user.
2513
     * - decoding: unused
2514
     */
2515
    int cutoff;
2516

    
2517
    /**
2518
     * Multiplied by qscale for each frame and added to scene_change_score.
2519
     * - encoding: Set by user.
2520
     * - decoding: unused
2521
     */
2522
    int scenechange_factor;
2523

    
2524
    /**
2525
     *
2526
     * Note: Value depends upon the compare function used for fullpel ME.
2527
     * - encoding: Set by user.
2528
     * - decoding: unused
2529
     */
2530
    int mv0_threshold;
2531

    
2532
    /**
2533
     * Adjusts sensitivity of b_frame_strategy 1.
2534
     * - encoding: Set by user.
2535
     * - decoding: unused
2536
     */
2537
    int b_sensitivity;
2538

    
2539
    /**
2540
     * - encoding: Set by user.
2541
     * - decoding: unused
2542
     */
2543
    int compression_level;
2544
#define FF_COMPRESSION_DEFAULT -1
2545

    
2546
#if FF_API_USE_LPC
2547
    /**
2548
     * Sets whether to use LPC mode - used by FLAC encoder.
2549
     * - encoding: Set by user.
2550
     * - decoding: unused
2551
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2552
     */
2553
    int use_lpc;
2554
#endif
2555

    
2556
    /**
2557
     * LPC coefficient precision - used by FLAC encoder
2558
     * - encoding: Set by user.
2559
     * - decoding: unused
2560
     */
2561
    int lpc_coeff_precision;
2562

    
2563
    /**
2564
     * - encoding: Set by user.
2565
     * - decoding: unused
2566
     */
2567
    int min_prediction_order;
2568

    
2569
    /**
2570
     * - encoding: Set by user.
2571
     * - decoding: unused
2572
     */
2573
    int max_prediction_order;
2574

    
2575
    /**
2576
     * search method for selecting prediction order
2577
     * - encoding: Set by user.
2578
     * - decoding: unused
2579
     */
2580
    int prediction_order_method;
2581

    
2582
    /**
2583
     * - encoding: Set by user.
2584
     * - decoding: unused
2585
     */
2586
    int min_partition_order;
2587

    
2588
    /**
2589
     * - encoding: Set by user.
2590
     * - decoding: unused
2591
     */
2592
    int max_partition_order;
2593

    
2594
    /**
2595
     * GOP timecode frame start number, in non drop frame format
2596
     * - encoding: Set by user.
2597
     * - decoding: unused
2598
     */
2599
    int64_t timecode_frame_start;
2600

    
2601
#if FF_API_REQUEST_CHANNELS
2602
    /**
2603
     * Decoder should decode to this many channels if it can (0 for default)
2604
     * - encoding: unused
2605
     * - decoding: Set by user.
2606
     * @deprecated Deprecated in favor of request_channel_layout.
2607
     */
2608
    int request_channels;
2609
#endif
2610

    
2611
    /**
2612
     * Percentage of dynamic range compression to be applied by the decoder.
2613
     * The default value is 1.0, corresponding to full compression.
2614
     * - encoding: unused
2615
     * - decoding: Set by user.
2616
     */
2617
    float drc_scale;
2618

    
2619
    /**
2620
     * opaque 64bit number (generally a PTS) that will be reordered and
2621
     * output in AVFrame.reordered_opaque
2622
     * @deprecated in favor of pkt_pts
2623
     * - encoding: unused
2624
     * - decoding: Set by user.
2625
     */
2626
    int64_t reordered_opaque;
2627

    
2628
    /**
2629
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2630
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2631
     * - encoding: set by user.
2632
     * - decoding: set by libavcodec.
2633
     */
2634
    int bits_per_raw_sample;
2635

    
2636
    /**
2637
     * Audio channel layout.
2638
     * - encoding: set by user.
2639
     * - decoding: set by libavcodec.
2640
     */
2641
    int64_t channel_layout;
2642

    
2643
    /**
2644
     * Request decoder to use this channel layout if it can (0 for default)
2645
     * - encoding: unused
2646
     * - decoding: Set by user.
2647
     */
2648
    int64_t request_channel_layout;
2649

    
2650
    /**
2651
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2652
     * - encoding: Set by user.
2653
     * - decoding: unused.
2654
     */
2655
    float rc_max_available_vbv_use;
2656

    
2657
    /**
2658
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2659
     * - encoding: Set by user.
2660
     * - decoding: unused.
2661
     */
2662
    float rc_min_vbv_overflow_use;
2663

    
2664
    /**
2665
     * Hardware accelerator in use
2666
     * - encoding: unused.
2667
     * - decoding: Set by libavcodec
2668
     */
2669
    struct AVHWAccel *hwaccel;
2670

    
2671
    /**
2672
     * For some codecs, the time base is closer to the field rate than the frame rate.
2673
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2674
     * if no telecine is used ...
2675
     *
2676
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2677
     */
2678
    int ticks_per_frame;
2679

    
2680
    /**
2681
     * Hardware accelerator context.
2682
     * For some hardware accelerators, a global context needs to be
2683
     * provided by the user. In that case, this holds display-dependent
2684
     * data FFmpeg cannot instantiate itself. Please refer to the
2685
     * FFmpeg HW accelerator documentation to know how to fill this
2686
     * is. e.g. for VA API, this is a struct vaapi_context.
2687
     * - encoding: unused
2688
     * - decoding: Set by user
2689
     */
2690
    void *hwaccel_context;
2691

    
2692
    /**
2693
     * Chromaticity coordinates of the source primaries.
2694
     * - encoding: Set by user
2695
     * - decoding: Set by libavcodec
2696
     */
2697
    enum AVColorPrimaries color_primaries;
2698

    
2699
    /**
2700
     * Color Transfer Characteristic.
2701
     * - encoding: Set by user
2702
     * - decoding: Set by libavcodec
2703
     */
2704
    enum AVColorTransferCharacteristic color_trc;
2705

    
2706
    /**
2707
     * YUV colorspace type.
2708
     * - encoding: Set by user
2709
     * - decoding: Set by libavcodec
2710
     */
2711
    enum AVColorSpace colorspace;
2712

    
2713
    /**
2714
     * MPEG vs JPEG YUV range.
2715
     * - encoding: Set by user
2716
     * - decoding: Set by libavcodec
2717
     */
2718
    enum AVColorRange color_range;
2719

    
2720
    /**
2721
     * This defines the location of chroma samples.
2722
     * - encoding: Set by user
2723
     * - decoding: Set by libavcodec
2724
     */
2725
    enum AVChromaLocation chroma_sample_location;
2726

    
2727
    /**
2728
     * The codec may call this to execute several independent things.
2729
     * It will return only after finishing all tasks.
2730
     * The user may replace this with some multithreaded implementation,
2731
     * the default implementation will execute the parts serially.
2732
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2733
     * @param c context passed also to func
2734
     * @param count the number of things to execute
2735
     * @param arg2 argument passed unchanged to func
2736
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2737
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2738
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2739
     *             two instances of func executing at the same time will have the same threadnr.
2740
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2741
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2742
     * - encoding: Set by libavcodec, user can override.
2743
     * - decoding: Set by libavcodec, user can override.
2744
     */
2745
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2746

    
2747
    /**
2748
     * explicit P-frame weighted prediction analysis method
2749
     * 0: off
2750
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2751
     * 2: smart weighting (full fade detection analysis)
2752
     * - encoding: Set by user.
2753
     * - decoding: unused
2754
     */
2755
    int weighted_p_pred;
2756

    
2757
    /**
2758
     * AQ mode
2759
     * 0: Disabled
2760
     * 1: Variance AQ (complexity mask)
2761
     * 2: Auto-variance AQ (experimental)
2762
     * - encoding: Set by user
2763
     * - decoding: unused
2764
     */
2765
    int aq_mode;
2766

    
2767
    /**
2768
     * AQ strength
2769
     * Reduces blocking and blurring in flat and textured areas.
2770
     * - encoding: Set by user
2771
     * - decoding: unused
2772
     */
2773
    float aq_strength;
2774

    
2775
    /**
2776
     * PSY RD
2777
     * Strength of psychovisual optimization
2778
     * - encoding: Set by user
2779
     * - decoding: unused
2780
     */
2781
    float psy_rd;
2782

    
2783
    /**
2784
     * PSY trellis
2785
     * Strength of psychovisual optimization
2786
     * - encoding: Set by user
2787
     * - decoding: unused
2788
     */
2789
    float psy_trellis;
2790

    
2791
    /**
2792
     * RC lookahead
2793
     * Number of frames for frametype and ratecontrol lookahead
2794
     * - encoding: Set by user
2795
     * - decoding: unused
2796
     */
2797
    int rc_lookahead;
2798

    
2799
    /**
2800
     * Constant rate factor maximum
2801
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2802
     * than crf_max, even if doing so would violate VBV restrictions.
2803
     * - encoding: Set by user.
2804
     * - decoding: unused
2805
     */
2806
    float crf_max;
2807

    
2808
    int log_level_offset;
2809

    
2810
    /**
2811
     * Determines which LPC analysis algorithm to use.
2812
     * - encoding: Set by user
2813
     * - decoding: unused
2814
     */
2815
    enum AVLPCType lpc_type;
2816

    
2817
    /**
2818
     * Number of passes to use for Cholesky factorization during LPC analysis
2819
     * - encoding: Set by user
2820
     * - decoding: unused
2821
     */
2822
    int lpc_passes;
2823

    
2824
    /**
2825
     * Number of slices.
2826
     * Indicates number of picture subdivisions. Used for parallelized
2827
     * decoding.
2828
     * - encoding: Set by user
2829
     * - decoding: unused
2830
     */
2831
    int slices;
2832

    
2833
    /**
2834
     * Header containing style information for text subtitles.
2835
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2836
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2837
     * the Format line following. It shouldn't include any Dialogue line.
2838
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2839
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2840
     */
2841
    uint8_t *subtitle_header;
2842
    int subtitle_header_size;
2843

    
2844
    /**
2845
     * Current packet as passed into the decoder, to avoid having
2846
     * to pass the packet into every function. Currently only valid
2847
     * inside lavc and get/release_buffer callbacks.
2848
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2849
     * - encoding: unused
2850
     */
2851
    AVPacket *pkt;
2852

    
2853
    /**
2854
     * Whether this is a copy of the context which had init() called on it.
2855
     * This is used by multithreading - shared tables and picture pointers
2856
     * should be freed from the original context only.
2857
     * - encoding: Set by libavcodec.
2858
     * - decoding: Set by libavcodec.
2859
     */
2860
    int is_copy;
2861

    
2862
    /**
2863
     * Which multithreading methods to use.
2864
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2865
     * so clients which cannot provide future frames should not use it.
2866
     *
2867
     * - encoding: Set by user, otherwise the default is used.
2868
     * - decoding: Set by user, otherwise the default is used.
2869
     */
2870
    int thread_type;
2871
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2872
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2873

    
2874
    /**
2875
     * Which multithreading methods are in use by the codec.
2876
     * - encoding: Set by libavcodec.
2877
     * - decoding: Set by libavcodec.
2878
     */
2879
    int active_thread_type;
2880

    
2881
    /**
2882
     * Set by the client if its custom get_buffer() callback can be called
2883
     * from another thread, which allows faster multithreaded decoding.
2884
     * draw_horiz_band() will be called from other threads regardless of this setting.
2885
     * Ignored if the default get_buffer() is used.
2886
     * - encoding: Set by user.
2887
     * - decoding: Set by user.
2888
     */
2889
    int thread_safe_callbacks;
2890

    
2891
    /**
2892
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2893
     * Used for compliant TS muxing.
2894
     * - encoding: Set by libavcodec.
2895
     * - decoding: unused.
2896
     */
2897
    uint64_t vbv_delay;
2898

    
2899
    /**
2900
     * Type of service that the audio stream conveys.
2901
     * - encoding: Set by user.
2902
     * - decoding: Set by libavcodec.
2903
     */
2904
    enum AVAudioServiceType audio_service_type;
2905

    
2906
    /**
2907
     * Current statistics for PTS correction.
2908
     * - decoding: maintained and used by libavcodec, not intended to be used by user apps
2909
     * - encoding: unused
2910
     */
2911
    int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
2912
    int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
2913
    int64_t pts_correction_last_pts;       /// PTS of the last frame
2914
    int64_t pts_correction_last_dts;       /// DTS of the last frame
2915

    
2916
    /**
2917
     * desired sample format
2918
     * - encoding: Not used.
2919
     * - decoding: Set by user.
2920
     * Decoder will decode to this format if it can.
2921
     */
2922
    enum AVSampleFormat request_sample_fmt;
2923

    
2924
} AVCodecContext;
2925

    
2926
/**
2927
 * AVProfile.
2928
 */
2929
typedef struct AVProfile {
2930
    int profile;
2931
    const char *name; ///< short name for the profile
2932
} AVProfile;
2933

    
2934
/**
2935
 * AVCodec.
2936
 */
2937
typedef struct AVCodec {
2938
    /**
2939
     * Name of the codec implementation.
2940
     * The name is globally unique among encoders and among decoders (but an
2941
     * encoder and a decoder can share the same name).
2942
     * This is the primary way to find a codec from the user perspective.
2943
     */
2944
    const char *name;
2945
    enum AVMediaType type;
2946
    enum CodecID id;
2947
    int priv_data_size;
2948
    int (*init)(AVCodecContext *);
2949
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2950
    int (*close)(AVCodecContext *);
2951
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2952
    /**
2953
     * Codec capabilities.
2954
     * see CODEC_CAP_*
2955
     */
2956
    int capabilities;
2957
    struct AVCodec *next;
2958
    /**
2959
     * Flush buffers.
2960
     * Will be called when seeking
2961
     */
2962
    void (*flush)(AVCodecContext *);
2963
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2964
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2965
    /**
2966
     * Descriptive name for the codec, meant to be more human readable than name.
2967
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2968
     */
2969
    const char *long_name;
2970
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2971
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2972
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2973
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2974
    const AVClass *priv_class;              ///< AVClass for the private context
2975
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2976

    
2977
    /**
2978
     * @defgroup framethreading Frame-level threading support functions.
2979
     * @{
2980
     */
2981
    /**
2982
     * If defined, called on thread contexts when they are created.
2983
     * If the codec allocates writable tables in init(), re-allocate them here.
2984
     * priv_data will be set to a copy of the original.
2985
     */
2986
    int (*init_thread_copy)(AVCodecContext *);
2987
    /**
2988
     * Copy necessary context variables from a previous thread context to the current one.
2989
     * If not defined, the next thread will start automatically; otherwise, the codec
2990
     * must call ff_thread_finish_setup().
2991
     *
2992
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2993
     */
2994
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2995
    /** @} */
2996
} AVCodec;
2997

    
2998
/**
2999
 * AVHWAccel.
3000
 */
3001
typedef struct AVHWAccel {
3002
    /**
3003
     * Name of the hardware accelerated codec.
3004
     * The name is globally unique among encoders and among decoders (but an
3005
     * encoder and a decoder can share the same name).
3006
     */
3007
    const char *name;
3008

    
3009
    /**
3010
     * Type of codec implemented by the hardware accelerator.
3011
     *
3012
     * See AVMEDIA_TYPE_xxx
3013
     */
3014
    enum AVMediaType type;
3015

    
3016
    /**
3017
     * Codec implemented by the hardware accelerator.
3018
     *
3019
     * See CODEC_ID_xxx
3020
     */
3021
    enum CodecID id;
3022

    
3023
    /**
3024
     * Supported pixel format.
3025
     *
3026
     * Only hardware accelerated formats are supported here.
3027
     */
3028
    enum PixelFormat pix_fmt;
3029

    
3030
    /**
3031
     * Hardware accelerated codec capabilities.
3032
     * see FF_HWACCEL_CODEC_CAP_*
3033
     */
3034
    int capabilities;
3035

    
3036
    struct AVHWAccel *next;
3037

    
3038
    /**
3039
     * Called at the beginning of each frame or field picture.
3040
     *
3041
     * Meaningful frame information (codec specific) is guaranteed to
3042
     * be parsed at this point. This function is mandatory.
3043
     *
3044
     * Note that buf can be NULL along with buf_size set to 0.
3045
     * Otherwise, this means the whole frame is available at this point.
3046
     *
3047
     * @param avctx the codec context
3048
     * @param buf the frame data buffer base
3049
     * @param buf_size the size of the frame in bytes
3050
     * @return zero if successful, a negative value otherwise
3051
     */
3052
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3053

    
3054
    /**
3055
     * Callback for each slice.
3056
     *
3057
     * Meaningful slice information (codec specific) is guaranteed to
3058
     * be parsed at this point. This function is mandatory.
3059
     *
3060
     * @param avctx the codec context
3061
     * @param buf the slice data buffer base
3062
     * @param buf_size the size of the slice in bytes
3063
     * @return zero if successful, a negative value otherwise
3064
     */
3065
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3066

    
3067
    /**
3068
     * Called at the end of each frame or field picture.
3069
     *
3070
     * The whole picture is parsed at this point and can now be sent
3071
     * to the hardware accelerator. This function is mandatory.
3072
     *
3073
     * @param avctx the codec context
3074
     * @return zero if successful, a negative value otherwise
3075
     */
3076
    int (*end_frame)(AVCodecContext *avctx);
3077

    
3078
    /**
3079
     * Size of HW accelerator private data.
3080
     *
3081
     * Private data is allocated with av_mallocz() before
3082
     * AVCodecContext.get_buffer() and deallocated after
3083
     * AVCodecContext.release_buffer().
3084
     */
3085
    int priv_data_size;
3086
} AVHWAccel;
3087

    
3088
/**
3089
 * four components are given, that's all.
3090
 * the last component is alpha
3091
 */
3092
typedef struct AVPicture {
3093
    uint8_t *data[4];
3094
    int linesize[4];       ///< number of bytes per line
3095
} AVPicture;
3096

    
3097
#if FF_API_PALETTE_CONTROL
3098
/**
3099
 * AVPaletteControl
3100
 * This structure defines a method for communicating palette changes
3101
 * between and demuxer and a decoder.
3102
 *
3103
 * @deprecated Use AVPacket to send palette changes instead.
3104
 * This is totally broken.
3105
 */
3106
#define AVPALETTE_SIZE 1024
3107
#define AVPALETTE_COUNT 256
3108
typedef struct AVPaletteControl {
3109

    
3110
    /* Demuxer sets this to 1 to indicate the palette has changed;
3111
     * decoder resets to 0. */
3112
    int palette_changed;
3113

    
3114
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3115
     * the individual palette components should be on a 8-bit scale; if
3116
     * the palette data comes from an IBM VGA native format, the component
3117
     * data is probably 6 bits in size and needs to be scaled. */
3118
    unsigned int palette[AVPALETTE_COUNT];
3119

    
3120
} AVPaletteControl attribute_deprecated;
3121
#endif
3122

    
3123
enum AVSubtitleType {
3124
    SUBTITLE_NONE,
3125

    
3126
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3127

    
3128
    /**
3129
     * Plain text, the text field must be set by the decoder and is
3130
     * authoritative. ass and pict fields may contain approximations.
3131
     */
3132
    SUBTITLE_TEXT,
3133

    
3134
    /**
3135
     * Formatted text, the ass field must be set by the decoder and is
3136
     * authoritative. pict and text fields may contain approximations.
3137
     */
3138
    SUBTITLE_ASS,
3139
};
3140

    
3141
typedef struct AVSubtitleRect {
3142
    int x;         ///< top left corner  of pict, undefined when pict is not set
3143
    int y;         ///< top left corner  of pict, undefined when pict is not set
3144
    int w;         ///< width            of pict, undefined when pict is not set
3145
    int h;         ///< height           of pict, undefined when pict is not set
3146
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3147

    
3148
    /**
3149
     * data+linesize for the bitmap of this subtitle.
3150
     * can be set for text/ass as well once they where rendered
3151
     */
3152
    AVPicture pict;
3153
    enum AVSubtitleType type;
3154

    
3155
    char *text;                     ///< 0 terminated plain UTF-8 text
3156

    
3157
    /**
3158
     * 0 terminated ASS/SSA compatible event line.
3159
     * The pressentation of this is unaffected by the other values in this
3160
     * struct.
3161
     */
3162
    char *ass;
3163
} AVSubtitleRect;
3164

    
3165
typedef struct AVSubtitle {
3166
    uint16_t format; /* 0 = graphics */
3167
    uint32_t start_display_time; /* relative to packet pts, in ms */
3168
    uint32_t end_display_time; /* relative to packet pts, in ms */
3169
    unsigned num_rects;
3170
    AVSubtitleRect **rects;
3171
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3172
} AVSubtitle;
3173

    
3174
/* packet functions */
3175

    
3176
/**
3177
 * @deprecated use NULL instead
3178
 */
3179
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3180

    
3181
/**
3182
 * Default packet destructor.
3183
 */
3184
void av_destruct_packet(AVPacket *pkt);
3185

    
3186
/**
3187
 * Initialize optional fields of a packet with default values.
3188
 *
3189
 * @param pkt packet
3190
 */
3191
void av_init_packet(AVPacket *pkt);
3192

    
3193
/**
3194
 * Allocate the payload of a packet and initialize its fields with
3195
 * default values.
3196
 *
3197
 * @param pkt packet
3198
 * @param size wanted payload size
3199
 * @return 0 if OK, AVERROR_xxx otherwise
3200
 */
3201
int av_new_packet(AVPacket *pkt, int size);
3202

    
3203
/**
3204
 * Reduce packet size, correctly zeroing padding
3205
 *
3206
 * @param pkt packet
3207
 * @param size new size
3208
 */
3209
void av_shrink_packet(AVPacket *pkt, int size);
3210

    
3211
/**
3212
 * Increase packet size, correctly zeroing padding
3213
 *
3214
 * @param pkt packet
3215
 * @param grow_by number of bytes by which to increase the size of the packet
3216
 */
3217
int av_grow_packet(AVPacket *pkt, int grow_by);
3218

    
3219
/**
3220
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3221
 * packet is allocated if it was not really allocated.
3222
 */
3223
int av_dup_packet(AVPacket *pkt);
3224

    
3225
/**
3226
 * Free a packet.
3227
 *
3228
 * @param pkt packet to free
3229
 */
3230
void av_free_packet(AVPacket *pkt);
3231

    
3232
/* resample.c */
3233

    
3234
struct ReSampleContext;
3235
struct AVResampleContext;
3236

    
3237
typedef struct ReSampleContext ReSampleContext;
3238

    
3239
#if FF_API_AUDIO_OLD
3240
/**
3241
 * @deprecated Use av_audio_resample_init() instead.
3242
 */
3243
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3244
                                                          int output_rate, int input_rate);
3245
#endif
3246

    
3247
/**
3248
 *  Initialize audio resampling context.
3249
 *
3250
 * @param output_channels  number of output channels
3251
 * @param input_channels   number of input channels
3252
 * @param output_rate      output sample rate
3253
 * @param input_rate       input sample rate
3254
 * @param sample_fmt_out   requested output sample format
3255
 * @param sample_fmt_in    input sample format
3256
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3257
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3258
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3259
                           between the 2 closest, if 0 the closest will be used
3260
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3261
 * @return allocated ReSampleContext, NULL if error occured
3262
 */
3263
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3264
                                        int output_rate, int input_rate,
3265
                                        enum AVSampleFormat sample_fmt_out,
3266
                                        enum AVSampleFormat sample_fmt_in,
3267
                                        int filter_length, int log2_phase_count,
3268
                                        int linear, double cutoff);
3269

    
3270
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3271

    
3272
/**
3273
 * Free resample context.
3274
 *
3275
 * @param s a non-NULL pointer to a resample context previously
3276
 *          created with av_audio_resample_init()
3277
 */
3278
void audio_resample_close(ReSampleContext *s);
3279

    
3280

    
3281
/**
3282
 * Initialize an audio resampler.
3283
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3284
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3285
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3286
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3287
                 between the 2 closest, if 0 the closest will be used
3288
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3289
 */
3290
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3291

    
3292
/**
3293
 * Resample an array of samples using a previously configured context.
3294
 * @param src an array of unconsumed samples
3295
 * @param consumed the number of samples of src which have been consumed are returned here
3296
 * @param src_size the number of unconsumed samples available
3297
 * @param dst_size the amount of space in samples available in dst
3298
 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
3299
 * @return the number of samples written in dst or -1 if an error occurred
3300
 */
3301
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3302

    
3303

    
3304
/**
3305
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3306
 * the resampler parameters, so no audible clicks or similar distortions occur
3307
 * @param compensation_distance distance in output samples over which the compensation should be performed
3308
 * @param sample_delta number of output samples which should be output less
3309
 *
3310
 * example: av_resample_compensate(c, 10, 500)
3311
 * here instead of 510 samples only 500 samples would be output
3312
 *
3313
 * note, due to rounding the actual compensation might be slightly different,
3314
 * especially if the compensation_distance is large and the in_rate used during init is small
3315
 */
3316
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3317
void av_resample_close(struct AVResampleContext *c);
3318

    
3319
/**
3320
 * Allocate memory for a picture.  Call avpicture_free() to free it.
3321
 *
3322
 * \see avpicture_fill()
3323
 *
3324
 * @param picture the picture to be filled in
3325
 * @param pix_fmt the format of the picture
3326
 * @param width the width of the picture
3327
 * @param height the height of the picture
3328
 * @return zero if successful, a negative value if not
3329
 */
3330
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3331

    
3332
/**
3333
 * Free a picture previously allocated by avpicture_alloc().
3334
 * The data buffer used by the AVPicture is freed, but the AVPicture structure
3335
 * itself is not.
3336
 *
3337
 * @param picture the AVPicture to be freed
3338
 */
3339
void avpicture_free(AVPicture *picture);
3340

    
3341
/**
3342
 * Fill in the AVPicture fields.
3343
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3344
 * which points to the image data buffer. Depending on the specified picture
3345
 * format, one or multiple image data pointers and line sizes will be set.
3346
 * If a planar format is specified, several pointers will be set pointing to
3347
 * the different picture planes and the line sizes of the different planes
3348
 * will be stored in the lines_sizes array.
3349
 * Call with ptr == NULL to get the required size for the ptr buffer.
3350
 *
3351
 * To allocate the buffer and fill in the AVPicture fields in one call,
3352
 * use avpicture_alloc().
3353
 *
3354
 * @param picture AVPicture whose fields are to be filled in
3355
 * @param ptr Buffer which will contain or contains the actual image data
3356
 * @param pix_fmt The format in which the picture data is stored.
3357
 * @param width the width of the image in pixels
3358
 * @param height the height of the image in pixels
3359
 * @return size of the image data in bytes
3360
 */
3361
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3362
                   enum PixelFormat pix_fmt, int width, int height);
3363

    
3364
/**
3365
 * Copy pixel data from an AVPicture into a buffer.
3366
 * The data is stored compactly, without any gaps for alignment or padding
3367
 * which may be applied by avpicture_fill().
3368
 *
3369
 * \see avpicture_get_size()
3370
 *
3371
 * @param[in] src AVPicture containing image data
3372
 * @param[in] pix_fmt The format in which the picture data is stored.
3373
 * @param[in] width the width of the image in pixels.
3374
 * @param[in] height the height of the image in pixels.
3375
 * @param[out] dest A buffer into which picture data will be copied.
3376
 * @param[in] dest_size The size of 'dest'.
3377
 * @return The number of bytes written to dest, or a negative value (error code) on error.
3378
 */
3379
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3380
                     unsigned char *dest, int dest_size);
3381

    
3382
/**
3383
 * Calculate the size in bytes that a picture of the given width and height
3384
 * would occupy if stored in the given picture format.
3385
 * Note that this returns the size of a compact representation as generated
3386
 * by avpicture_layout(), which can be smaller than the size required for e.g.
3387
 * avpicture_fill().
3388
 *
3389
 * @param pix_fmt the given picture format
3390
 * @param width the width of the image
3391
 * @param height the height of the image
3392
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3393
 */
3394
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3395
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3396

    
3397
/**
3398
 * Return the short name for a pixel format.
3399
 *
3400
 * \see av_get_pix_fmt(), av_get_pix_fmt_string().
3401
 */
3402
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3403

    
3404
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3405

    
3406
#if LIBAVCODEC_VERSION_MAJOR < 53
3407
/**
3408
 * Return the pixel format corresponding to the name name.
3409
 *
3410
 * If there is no pixel format with name name, then look for a
3411
 * pixel format with the name corresponding to the native endian
3412
 * format of name.
3413
 * For example in a little-endian system, first look for "gray16",
3414
 * then for "gray16le".
3415
 *
3416
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3417
 *
3418
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3419
 */
3420
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3421
#endif
3422

    
3423
/**
3424
 * Return a value representing the fourCC code associated to the
3425
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3426
 * found.
3427
 */
3428
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3429

    
3430
/**
3431
 * Put a string representing the codec tag codec_tag in buf.
3432
 *
3433
 * @param buf_size size in bytes of buf
3434
 * @return the length of the string that would have been generated if
3435
 * enough space had been available, excluding the trailing null
3436
 */
3437
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3438

    
3439
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3440
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3441
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3442
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3443
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3444
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3445

    
3446
/**
3447
 * Compute what kind of losses will occur when converting from one specific
3448
 * pixel format to another.
3449
 * When converting from one pixel format to another, information loss may occur.
3450
 * For example, when converting from RGB24 to GRAY, the color information will
3451
 * be lost. Similarly, other losses occur when converting from some formats to
3452
 * other formats. These losses can involve loss of chroma, but also loss of
3453
 * resolution, loss of color depth, loss due to the color space conversion, loss
3454
 * of the alpha bits or loss due to color quantization.
3455
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3456
 * which will occur when converting from one pixel format to another.
3457
 *
3458
 * @param[in] dst_pix_fmt destination pixel format
3459
 * @param[in] src_pix_fmt source pixel format
3460
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3461
 * @return Combination of flags informing you what kind of losses will occur.
3462
 */
3463
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3464
                             int has_alpha);
3465

    
3466
/**
3467
 * Find the best pixel format to convert to given a certain source pixel
3468
 * format.  When converting from one pixel format to another, information loss
3469
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3470
 * information will be lost. Similarly, other losses occur when converting from
3471
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3472
 * the given pixel formats should be used to suffer the least amount of loss.
3473
 * The pixel formats from which it chooses one, are determined by the
3474
 * pix_fmt_mask parameter.
3475
 *
3476
 * @code
3477
 * src_pix_fmt = PIX_FMT_YUV420P;
3478
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3479
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3480
 * @endcode
3481
 *
3482
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3483
 * @param[in] src_pix_fmt source pixel format
3484
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3485
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3486
 * @return The best pixel format to convert to or -1 if none was found.
3487
 */
3488
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3489
                              int has_alpha, int *loss_ptr);
3490

    
3491
#if LIBAVCODEC_VERSION_MAJOR < 53
3492
/**
3493
 * @deprecated Use av_get_pix_fmt_string() instead.
3494
 */
3495
attribute_deprecated
3496
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3497
#endif
3498

    
3499
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3500
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3501

    
3502
/**
3503
 * Tell if an image really has transparent alpha values.
3504
 * @return ored mask of FF_ALPHA_xxx constants
3505
 */
3506
int img_get_alpha_info(const AVPicture *src,
3507
                       enum PixelFormat pix_fmt, int width, int height);
3508

    
3509
/* deinterlace a picture */
3510
/* deinterlace - if not supported return -1 */
3511
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3512
                          enum PixelFormat pix_fmt, int width, int height);
3513

    
3514
/* external high level API */
3515

    
3516
/**
3517
 * If c is NULL, returns the first registered codec,
3518
 * if c is non-NULL, returns the next registered codec after c,
3519
 * or NULL if c is the last one.
3520
 */
3521
AVCodec *av_codec_next(AVCodec *c);
3522

    
3523
/**
3524
 * Return the LIBAVCODEC_VERSION_INT constant.
3525
 */
3526
unsigned avcodec_version(void);
3527

    
3528
/**
3529
 * Return the libavcodec build-time configuration.
3530
 */
3531
const char *avcodec_configuration(void);
3532

    
3533
/**
3534
 * Return the libavcodec license.
3535
 */
3536
const char *avcodec_license(void);
3537

    
3538
/**
3539
 * Initialize libavcodec.
3540
 * If called more than once, does nothing.
3541
 *
3542
 * @warning This function must be called before any other libavcodec
3543
 * function.
3544
 *
3545
 * @warning This function is not thread-safe.
3546
 */
3547
void avcodec_init(void);
3548

    
3549
#if LIBAVCODEC_VERSION_MAJOR < 53
3550
/**
3551
 * @deprecated Deprecated in favor of avcodec_register().
3552
 */
3553
attribute_deprecated void register_avcodec(AVCodec *codec);
3554
#endif
3555

    
3556
/**
3557
 * Register the codec codec and initialize libavcodec.
3558
 *
3559
 * @see avcodec_init(), avcodec_register_all()
3560
 */
3561
void avcodec_register(AVCodec *codec);
3562

    
3563
/**
3564
 * Find a registered encoder with a matching codec ID.
3565
 *
3566
 * @param id CodecID of the requested encoder
3567
 * @return An encoder if one was found, NULL otherwise.
3568
 */
3569
AVCodec *avcodec_find_encoder(enum CodecID id);
3570

    
3571
/**
3572
 * Find a registered encoder with the specified name.
3573
 *
3574
 * @param name name of the requested encoder
3575
 * @return An encoder if one was found, NULL otherwise.
3576
 */
3577
AVCodec *avcodec_find_encoder_by_name(const char *name);
3578

    
3579
/**
3580
 * Find a registered decoder with a matching codec ID.
3581
 *
3582
 * @param id CodecID of the requested decoder
3583
 * @return A decoder if one was found, NULL otherwise.
3584
 */
3585
AVCodec *avcodec_find_decoder(enum CodecID id);
3586

    
3587
/**
3588
 * Find a registered decoder with the specified name.
3589
 *
3590
 * @param name name of the requested decoder
3591
 * @return A decoder if one was found, NULL otherwise.
3592
 */
3593
AVCodec *avcodec_find_decoder_by_name(const char *name);
3594
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3595

    
3596
/**
3597
 * Return a name for the specified profile, if available.
3598
 *
3599
 * @param codec the codec that is searched for the given profile
3600
 * @param profile the profile value for which a name is requested
3601
 * @return A name for the profile if found, NULL otherwise.
3602
 */
3603
const char *av_get_profile_name(const AVCodec *codec, int profile);
3604

    
3605
/**
3606
 * Set the fields of the given AVCodecContext to default values.
3607
 *
3608
 * @param s The AVCodecContext of which the fields should be set to default values.
3609
 */
3610
void avcodec_get_context_defaults(AVCodecContext *s);
3611

    
3612
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3613
 *  we WILL change its arguments and name a few times! */
3614
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3615

    
3616
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3617
 *  we WILL change its arguments and name a few times! */
3618
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3619

    
3620
/**
3621
 * Allocate an AVCodecContext and set its fields to default values.  The
3622
 * resulting struct can be deallocated by simply calling av_free().
3623
 *
3624
 * @return An AVCodecContext filled with default values or NULL on failure.
3625
 * @see avcodec_get_context_defaults
3626
 */
3627
AVCodecContext *avcodec_alloc_context(void);
3628

    
3629
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3630
 *  we WILL change its arguments and name a few times! */
3631
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3632

    
3633
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3634
 *  we WILL change its arguments and name a few times! */
3635
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3636

    
3637
/**
3638
 * Copy the settings of the source AVCodecContext into the destination
3639
 * AVCodecContext. The resulting destination codec context will be
3640
 * unopened, i.e. you are required to call avcodec_open() before you
3641
 * can use this AVCodecContext to decode/encode video/audio data.
3642
 *
3643
 * @param dest target codec context, should be initialized with
3644
 *             avcodec_alloc_context(), but otherwise uninitialized
3645
 * @param src source codec context
3646
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3647
 */
3648
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3649

    
3650
/**
3651
 * Set the fields of the given AVFrame to default values.
3652
 *
3653
 * @param pic The AVFrame of which the fields should be set to default values.
3654
 */
3655
void avcodec_get_frame_defaults(AVFrame *pic);
3656

    
3657
/**
3658
 * Allocate an AVFrame and set its fields to default values.  The resulting
3659
 * struct can be deallocated by simply calling av_free().
3660
 *
3661
 * @return An AVFrame filled with default values or NULL on failure.
3662
 * @see avcodec_get_frame_defaults
3663
 */
3664
AVFrame *avcodec_alloc_frame(void);
3665

    
3666
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3667
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3668
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3669

    
3670
/**
3671
 * Return the amount of padding in pixels which the get_buffer callback must
3672
 * provide around the edge of the image for codecs which do not have the
3673
 * CODEC_FLAG_EMU_EDGE flag.
3674
 *
3675
 * @return Required padding in pixels.
3676
 */
3677
unsigned avcodec_get_edge_width(void);
3678
/**
3679
 * Modify width and height values so that they will result in a memory
3680
 * buffer that is acceptable for the codec if you do not use any horizontal
3681
 * padding.
3682
 *
3683
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3684
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3685
 * according to avcodec_get_edge_width() before.
3686
 */
3687
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3688
/**
3689
 * Modify width and height values so that they will result in a memory
3690
 * buffer that is acceptable for the codec if you also ensure that all
3691
 * line sizes are a multiple of the respective linesize_align[i].
3692
 *
3693
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3694
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3695
 * according to avcodec_get_edge_width() before.
3696
 */
3697
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3698
                               int linesize_align[4]);
3699

    
3700
#if LIBAVCODEC_VERSION_MAJOR < 53
3701
/**
3702
 * @deprecated Deprecated in favor of av_check_image_size().
3703
 */
3704
attribute_deprecated
3705
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3706
#endif
3707

    
3708
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3709

    
3710
#if FF_API_THREAD_INIT
3711
/**
3712
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3713
 */
3714
attribute_deprecated
3715
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3716
void avcodec_thread_free(AVCodecContext *s);
3717
#endif
3718
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3719
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3720
//FIXME func typedef
3721

    
3722
/**
3723
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3724
 * function the context has to be allocated.
3725
 *
3726
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3727
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3728
 * retrieving a codec.
3729
 *
3730
 * @warning This function is not thread safe!
3731
 *
3732
 * @code
3733
 * avcodec_register_all();
3734
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3735
 * if (!codec)
3736
 *     exit(1);
3737
 *
3738
 * context = avcodec_alloc_context();
3739
 *
3740
 * if (avcodec_open(context, codec) < 0)
3741
 *     exit(1);
3742
 * @endcode
3743
 *
3744
 * @param avctx The context which will be set up to use the given codec.
3745
 * @param codec The codec to use within the context.
3746
 * @return zero on success, a negative value on error
3747
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder, avcodec_close
3748
 */
3749
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3750

    
3751
#if FF_API_AUDIO_OLD
3752
/**
3753
 * Decode an audio frame from buf into samples.
3754
 * Wrapper function which calls avcodec_decode_audio3.
3755
 *
3756
 * @deprecated Use avcodec_decode_audio3 instead.
3757
 * @param avctx the codec context
3758
 * @param[out] samples the output buffer
3759
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3760
 * @param[in] buf the input buffer
3761
 * @param[in] buf_size the input buffer size in bytes
3762
 * @return On error a negative value is returned, otherwise the number of bytes
3763
 * used or zero if no frame could be decompressed.
3764
 */
3765
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3766
                         int *frame_size_ptr,
3767
                         const uint8_t *buf, int buf_size);
3768
#endif
3769

    
3770
/**
3771
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3772
 * Some decoders may support multiple frames in a single AVPacket, such
3773
 * decoders would then just decode the first frame. In this case,
3774
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3775
 * the remaining data in order to decode the second frame etc.
3776
 * If no frame
3777
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3778
 * decompressed frame size in bytes.
3779
 *
3780
 * @warning You must set frame_size_ptr to the allocated size of the
3781
 * output buffer before calling avcodec_decode_audio3().
3782
 *
3783
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3784
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3785
 * bits at once and could read over the end.
3786
 *
3787
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3788
 * no overreading happens for damaged MPEG streams.
3789
 *
3790
 * @note You might have to align the input buffer avpkt->data and output buffer
3791
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3792
 * necessary at all, on others it won't work at all if not aligned and on others
3793
 * it will work but it will have an impact on performance.
3794
 *
3795
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3796
 * samples should be 16 byte aligned unless the CPU doesn't need it
3797
 * (AltiVec and SSE do).
3798
 *
3799
 * @param avctx the codec context
3800
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3801
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3802
 * @param[in] avpkt The input AVPacket containing the input buffer.
3803
 *            You can create such packet with av_init_packet() and by then setting
3804
 *            data and size, some decoders might in addition need other fields.
3805
 *            All decoders are designed to use the least fields possible though.
3806
 * @return On error a negative value is returned, otherwise the number of bytes
3807
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3808
 */
3809
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3810
                         int *frame_size_ptr,
3811
                         AVPacket *avpkt);
3812

    
3813
#if FF_API_VIDEO_OLD
3814
/**
3815
 * Decode a video frame from buf into picture.
3816
 * Wrapper function which calls avcodec_decode_video2.
3817
 *
3818
 * @deprecated Use avcodec_decode_video2 instead.
3819
 * @param avctx the codec context
3820
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3821
 * @param[in] buf the input buffer
3822
 * @param[in] buf_size the size of the input buffer in bytes
3823
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3824
 * @return On error a negative value is returned, otherwise the number of bytes
3825
 * used or zero if no frame could be decompressed.
3826
 */
3827
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3828
                         int *got_picture_ptr,
3829
                         const uint8_t *buf, int buf_size);
3830
#endif
3831

    
3832
/**
3833
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3834
 * Some decoders may support multiple frames in a single AVPacket, such
3835
 * decoders would then just decode the first frame.
3836
 *
3837
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3838
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3839
 * bits at once and could read over the end.
3840
 *
3841
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3842
 * no overreading happens for damaged MPEG streams.
3843
 *
3844
 * @note You might have to align the input buffer avpkt->data.
3845
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3846
 * necessary at all, on others it won't work at all if not aligned and on others
3847
 * it will work but it will have an impact on performance.
3848
 *
3849
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3850
 *
3851
 * @note Some codecs have a delay between input and output, these need to be
3852
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3853
 *
3854
 * @param avctx the codec context
3855
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3856
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3857
 *             allocate memory for the actual bitmap.
3858
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3859
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3860
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3861
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3862
 *
3863
 * @param[in] avpkt The input AVpacket containing the input buffer.
3864
 *            You can create such packet with av_init_packet() and by then setting
3865
 *            data and size, some decoders might in addition need other fields like
3866
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3867
 *            fields possible.
3868
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3869
 * @return On error a negative value is returned, otherwise the number of bytes
3870
 * used or zero if no frame could be decompressed.
3871
 */
3872
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3873
                         int *got_picture_ptr,
3874
                         AVPacket *avpkt);
3875

    
3876
#if FF_API_SUBTITLE_OLD
3877
/* Decode a subtitle message. Return -1 if error, otherwise return the
3878
 * number of bytes used. If no subtitle could be decompressed,
3879
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3880
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3881
                            int *got_sub_ptr,
3882
                            const uint8_t *buf, int buf_size);
3883
#endif
3884

    
3885
/**
3886
 * Decode a subtitle message.
3887
 * Return a negative value on error, otherwise return the number of bytes used.
3888
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3889
 * Otherwise, the subtitle is stored in *sub.
3890
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3891
 * simplicity, because the performance difference is expect to be negligible
3892
 * and reusing a get_buffer written for video codecs would probably perform badly
3893
 * due to a potentially very different allocation pattern.
3894
 *
3895
 * @param avctx the codec context
3896
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3897
                   freed with avsubtitle_free if *got_sub_ptr is set.
3898
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3899
 * @param[in] avpkt The input AVPacket containing the input buffer.
3900
 */
3901
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3902
                            int *got_sub_ptr,
3903
                            AVPacket *avpkt);
3904

    
3905
/**
3906
 * Frees all allocated data in the given subtitle struct.
3907
 *
3908
 * @param sub AVSubtitle to free.
3909
 */
3910
void avsubtitle_free(AVSubtitle *sub);
3911

    
3912
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3913
                        int *data_size_ptr,
3914
                        uint8_t *buf, int buf_size);
3915

    
3916
/**
3917
 * Encode an audio frame from samples into buf.
3918
 *
3919
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3920
 * However, for PCM audio the user will know how much space is needed
3921
 * because it depends on the value passed in buf_size as described
3922
 * below. In that case a lower value can be used.
3923
 *
3924
 * @param avctx the codec context
3925
 * @param[out] buf the output buffer
3926
 * @param[in] buf_size the output buffer size
3927
 * @param[in] samples the input buffer containing the samples
3928
 * The number of samples read from this buffer is frame_size*channels,
3929
 * both of which are defined in avctx.
3930
 * For PCM audio the number of samples read from samples is equal to
3931
 * buf_size * input_sample_size / output_sample_size.
3932
 * @return On error a negative value is returned, on success zero or the number
3933
 * of bytes used to encode the data read from the input buffer.
3934
 */
3935
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3936
                         const short *samples);
3937

    
3938
/**
3939
 * Encode a video frame from pict into buf.
3940
 * The input picture should be
3941
 * stored using a specific format, namely avctx.pix_fmt.
3942
 *
3943
 * @param avctx the codec context
3944
 * @param[out] buf the output buffer for the bitstream of encoded frame
3945
 * @param[in] buf_size the size of the output buffer in bytes
3946
 * @param[in] pict the input picture to encode
3947
 * @return On error a negative value is returned, on success zero or the number
3948
 * of bytes used from the output buffer.
3949
 */
3950
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3951
                         const AVFrame *pict);
3952
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3953
                            const AVSubtitle *sub);
3954

    
3955
int avcodec_close(AVCodecContext *avctx);
3956

    
3957
/**
3958
 * Register all the codecs, parsers and bitstream filters which were enabled at
3959
 * configuration time. If you do not call this function you can select exactly
3960
 * which formats you want to support, by using the individual registration
3961
 * functions.
3962
 *
3963
 * @see avcodec_register
3964
 * @see av_register_codec_parser
3965
 * @see av_register_bitstream_filter
3966
 */
3967
void avcodec_register_all(void);
3968

    
3969
/**
3970
 * Flush buffers, should be called when seeking or when switching to a different stream.
3971
 */
3972
void avcodec_flush_buffers(AVCodecContext *avctx);
3973

    
3974
void avcodec_default_free_buffers(AVCodecContext *s);
3975

    
3976
/* misc useful functions */
3977

    
3978
#if FF_API_OLD_FF_PICT_TYPES
3979
/**
3980
 * Return a single letter to describe the given picture type pict_type.
3981
 *
3982
 * @param[in] pict_type the picture type
3983
 * @return A single character representing the picture type.
3984
 * @deprecated Use av_get_picture_type_char() instead.
3985
 */
3986
attribute_deprecated
3987
char av_get_pict_type_char(int pict_type);
3988
#endif
3989

    
3990
/**
3991
 * Return codec bits per sample.
3992
 *
3993
 * @param[in] codec_id the codec
3994
 * @return Number of bits per sample or zero if unknown for the given codec.
3995
 */
3996
int av_get_bits_per_sample(enum CodecID codec_id);
3997

    
3998
#if FF_API_OLD_SAMPLE_FMT
3999
/**
4000
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
4001
 */
4002
attribute_deprecated
4003
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
4004
#endif
4005

    
4006
/* frame parsing */
4007
typedef struct AVCodecParserContext {
4008
    void *priv_data;
4009
    struct AVCodecParser *parser;
4010
    int64_t frame_offset; /* offset of the current frame */
4011
    int64_t cur_offset; /* current offset
4012
                           (incremented by each av_parser_parse()) */
4013
    int64_t next_frame_offset; /* offset of the next frame */
4014
    /* video info */
4015
    int pict_type; /* XXX: Put it back in AVCodecContext. */
4016
    /**
4017
     * This field is used for proper frame duration computation in lavf.
4018
     * It signals, how much longer the frame duration of the current frame
4019
     * is compared to normal frame duration.
4020
     *
4021
     * frame_duration = (1 + repeat_pict) * time_base
4022
     *
4023
     * It is used by codecs like H.264 to display telecined material.
4024
     */
4025
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
4026
    int64_t pts;     /* pts of the current frame */
4027
    int64_t dts;     /* dts of the current frame */
4028

    
4029
    /* private data */
4030
    int64_t last_pts;
4031
    int64_t last_dts;
4032
    int fetch_timestamp;
4033

    
4034
#define AV_PARSER_PTS_NB 4
4035
    int cur_frame_start_index;
4036
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
4037
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
4038
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
4039

    
4040
    int flags;
4041
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
4042
#define PARSER_FLAG_ONCE                      0x0002
4043
/// Set if the parser has a valid file offset
4044
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
4045

    
4046
    int64_t offset;      ///< byte offset from starting packet start
4047
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
4048

    
4049
    /*!
4050
     * Set by parser to 1 for key frames and 0 for non-key frames.
4051
     * It is initialized to -1, so if the parser doesn't set this flag,
4052
     * old-style fallback using FF_I_TYPE picture type as key frames
4053
     * will be used.
4054
     */
4055
    int key_frame;
4056

    
4057
    /**
4058
     * Time difference in stream time base units from the pts of this
4059
     * packet to the point at which the output from the decoder has converged
4060
     * independent from the availability of previous frames. That is, the
4061
     * frames are virtually identical no matter if decoding started from
4062
     * the very first frame or from this keyframe.
4063
     * Is AV_NOPTS_VALUE if unknown.
4064
     * This field is not the display duration of the current frame.
4065
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
4066
     * set.
4067
     *
4068
     * The purpose of this field is to allow seeking in streams that have no
4069
     * keyframes in the conventional sense. It corresponds to the
4070
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
4071
     * essential for some types of subtitle streams to ensure that all
4072
     * subtitles are correctly displayed after seeking.
4073
     */
4074
    int64_t convergence_duration;
4075

    
4076
    // Timestamp generation support:
4077
    /**
4078
     * Synchronization point for start of timestamp generation.
4079
     *
4080
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
4081
     * (default).
4082
     *
4083
     * For example, this corresponds to presence of H.264 buffering period
4084
     * SEI message.
4085
     */
4086
    int dts_sync_point;
4087

    
4088
    /**
4089
     * Offset of the current timestamp against last timestamp sync point in
4090
     * units of AVCodecContext.time_base.
4091
     *
4092
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4093
     * contain a valid timestamp offset.
4094
     *
4095
     * Note that the timestamp of sync point has usually a nonzero
4096
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
4097
     * the next frame after timestamp sync point will be usually 1.
4098
     *
4099
     * For example, this corresponds to H.264 cpb_removal_delay.
4100
     */
4101
    int dts_ref_dts_delta;
4102

    
4103
    /**
4104
     * Presentation delay of current frame in units of AVCodecContext.time_base.
4105
     *
4106
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4107
     * contain valid non-negative timestamp delta (presentation time of a frame
4108
     * must not lie in the past).
4109
     *
4110
     * This delay represents the difference between decoding and presentation
4111
     * time of the frame.
4112
     *
4113
     * For example, this corresponds to H.264 dpb_output_delay.
4114
     */
4115
    int pts_dts_delta;
4116

    
4117
    /**
4118
     * Position of the packet in file.
4119
     *
4120
     * Analogous to cur_frame_pts/dts
4121
     */
4122
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
4123

    
4124
    /**
4125
     * Byte position of currently parsed frame in stream.
4126
     */
4127
    int64_t pos;
4128

    
4129
    /**
4130
     * Previous frame byte position.
4131
     */
4132
    int64_t last_pos;
4133
} AVCodecParserContext;
4134

    
4135
typedef struct AVCodecParser {
4136
    int codec_ids[5]; /* several codec IDs are permitted */
4137
    int priv_data_size;
4138
    int (*parser_init)(AVCodecParserContext *s);
4139
    int (*parser_parse)(AVCodecParserContext *s,
4140
                        AVCodecContext *avctx,
4141
                        const uint8_t **poutbuf, int *poutbuf_size,
4142
                        const uint8_t *buf, int buf_size);
4143
    void (*parser_close)(AVCodecParserContext *s);
4144
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
4145
    struct AVCodecParser *next;
4146
} AVCodecParser;
4147

    
4148
AVCodecParser *av_parser_next(AVCodecParser *c);
4149

    
4150
void av_register_codec_parser(AVCodecParser *parser);
4151
AVCodecParserContext *av_parser_init(int codec_id);
4152

    
4153
#if LIBAVCODEC_VERSION_MAJOR < 53
4154
attribute_deprecated
4155
int av_parser_parse(AVCodecParserContext *s,
4156
                    AVCodecContext *avctx,
4157
                    uint8_t **poutbuf, int *poutbuf_size,
4158
                    const uint8_t *buf, int buf_size,
4159
                    int64_t pts, int64_t dts);
4160
#endif
4161

    
4162
/**
4163
 * Parse a packet.
4164
 *
4165
 * @param s             parser context.
4166
 * @param avctx         codec context.
4167
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4168
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4169
 * @param buf           input buffer.
4170
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4171
 * @param pts           input presentation timestamp.
4172
 * @param dts           input decoding timestamp.
4173
 * @param pos           input byte position in stream.
4174
 * @return the number of bytes of the input bitstream used.
4175
 *
4176
 * Example:
4177
 * @code
4178
 *   while(in_len){
4179
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4180
 *                                        in_data, in_len,
4181
 *                                        pts, dts, pos);
4182
 *       in_data += len;
4183
 *       in_len  -= len;
4184
 *
4185
 *       if(size)
4186
 *          decode_frame(data, size);
4187
 *   }
4188
 * @endcode
4189
 */
4190
int av_parser_parse2(AVCodecParserContext *s,
4191
                     AVCodecContext *avctx,
4192
                     uint8_t **poutbuf, int *poutbuf_size,
4193
                     const uint8_t *buf, int buf_size,
4194
                     int64_t pts, int64_t dts,
4195
                     int64_t pos);
4196

    
4197
int av_parser_change(AVCodecParserContext *s,
4198
                     AVCodecContext *avctx,
4199
                     uint8_t **poutbuf, int *poutbuf_size,
4200
                     const uint8_t *buf, int buf_size, int keyframe);
4201
void av_parser_close(AVCodecParserContext *s);
4202

    
4203

    
4204
typedef struct AVBitStreamFilterContext {
4205
    void *priv_data;
4206
    struct AVBitStreamFilter *filter;
4207
    AVCodecParserContext *parser;
4208
    struct AVBitStreamFilterContext *next;
4209
} AVBitStreamFilterContext;
4210

    
4211

    
4212
typedef struct AVBitStreamFilter {
4213
    const char *name;
4214
    int priv_data_size;
4215
    int (*filter)(AVBitStreamFilterContext *bsfc,
4216
                  AVCodecContext *avctx, const char *args,
4217
                  uint8_t **poutbuf, int *poutbuf_size,
4218
                  const uint8_t *buf, int buf_size, int keyframe);
4219
    void (*close)(AVBitStreamFilterContext *bsfc);
4220
    struct AVBitStreamFilter *next;
4221
} AVBitStreamFilter;
4222

    
4223
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4224
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4225
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4226
                               AVCodecContext *avctx, const char *args,
4227
                               uint8_t **poutbuf, int *poutbuf_size,
4228
                               const uint8_t *buf, int buf_size, int keyframe);
4229
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4230

    
4231
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4232

    
4233
/* memory */
4234

    
4235
/**
4236
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4237
 *
4238
 * @see av_realloc
4239
 */
4240
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4241

    
4242
/**
4243
 * Allocate a buffer, reusing the given one if large enough.
4244
 *
4245
 * Contrary to av_fast_realloc the current buffer contents might not be
4246
 * preserved and on error the old buffer is freed, thus no special
4247
 * handling to avoid memleaks is necessary.
4248
 *
4249
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4250
 * @param size size of the buffer *ptr points to
4251
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4252
 *                 *size 0 if an error occurred.
4253
 */
4254
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4255

    
4256
#if LIBAVCODEC_VERSION_MAJOR < 53
4257
/**
4258
 * @deprecated Deprecated in favor of av_image_copy().
4259
 */
4260
attribute_deprecated
4261
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4262
                          uint8_t *src_data[4], int src_linesize[4],
4263
                          enum PixelFormat pix_fmt, int width, int height);
4264
#endif
4265

    
4266
/**
4267
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4268
 */
4269
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4270
                     enum PixelFormat pix_fmt, int width, int height);
4271

    
4272
/**
4273
 * Crop image top and left side.
4274
 */
4275
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4276
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4277

    
4278
/**
4279
 * Pad image.
4280
 */
4281
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4282
            int padtop, int padbottom, int padleft, int padright, int *color);
4283

    
4284
/**
4285
 * Encode extradata length to a buffer. Used by xiph codecs.
4286
 *
4287
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4288
 * @param v size of extradata in bytes
4289
 * @return number of bytes written to the buffer.
4290
 */
4291
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4292

    
4293
#if LIBAVCODEC_VERSION_MAJOR < 53
4294
/**
4295
 * Parse str and put in width_ptr and height_ptr the detected values.
4296
 *
4297
 * @deprecated Deprecated in favor of av_parse_video_size().
4298
 */
4299
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4300

    
4301
/**
4302
 * Parse str and store the detected values in *frame_rate.
4303
 *
4304
 * @deprecated Deprecated in favor of av_parse_video_rate().
4305
 */
4306
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4307
#endif
4308

    
4309
/**
4310
 * Logs a generic warning message about a missing feature. This function is
4311
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4312
 * only, and would normally not be used by applications.
4313
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4314
 * a pointer to an AVClass struct
4315
 * @param[in] feature string containing the name of the missing feature
4316
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4317
 * If want_sample is non-zero, additional verbage will be added to the log
4318
 * message which tells the user how to report samples to the development
4319
 * mailing list.
4320
 */
4321
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4322

    
4323
/**
4324
 * Log a generic warning message asking for a sample. This function is
4325
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4326
 * only, and would normally not be used by applications.
4327
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4328
 * a pointer to an AVClass struct
4329
 * @param[in] msg string containing an optional message, or NULL if no message
4330
 */
4331
void av_log_ask_for_sample(void *avc, const char *msg, ...);
4332

    
4333
/**
4334
 * Register the hardware accelerator hwaccel.
4335
 */
4336
void av_register_hwaccel(AVHWAccel *hwaccel);
4337

    
4338
/**
4339
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4340
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4341
 * after hwaccel, or NULL if hwaccel is the last one.
4342
 */
4343
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4344

    
4345

    
4346
/**
4347
 * Lock operation used by lockmgr
4348
 */
4349
enum AVLockOp {
4350
  AV_LOCK_CREATE,  ///< Create a mutex
4351
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4352
  AV_LOCK_RELEASE, ///< Unlock the mutex
4353
  AV_LOCK_DESTROY, ///< Free mutex resources
4354
};
4355

    
4356
/**
4357
 * Register a user provided lock manager supporting the operations
4358
 * specified by AVLockOp. mutex points to a (void *) where the
4359
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4360
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4361
 *
4362
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4363
 *           callback during the call to av_lockmgr_register().
4364
 *           Thus, the application must be prepared to handle that.
4365
 *           If cb is set to NULL the lockmgr will be unregistered.
4366
 *           Also note that during unregistration the previously registered
4367
 *           lockmgr callback may also be invoked.
4368
 */
4369
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4370

    
4371
#endif /* AVCODEC_AVCODEC_H */