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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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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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    /* 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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    /* 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
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    to indicate that the user requests the channel order of the decoder output
418
    to be the native codec channel order. */
419
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
422
#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 */
440
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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442
/**
443
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
444
 * This is mainly needed because some optimized bitstream readers read
445
 * 32 or 64 bit at once and could read over the end.<br>
446
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
447
 * MPEG bitstreams could cause overread and segfault.
448
 */
449
#define FF_INPUT_BUFFER_PADDING_SIZE 8
450

    
451
/**
452
 * minimum encoding buffer size
453
 * Used to avoid some checks during header writing.
454
 */
455
#define FF_MIN_BUFFER_SIZE 16384
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457

    
458
/**
459
 * motion estimation type.
460
 */
461
enum Motion_Est_ID {
462
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
463
    ME_FULL,
464
    ME_LOG,
465
    ME_PHODS,
466
    ME_EPZS,        ///< enhanced predictive zonal search
467
    ME_X1,          ///< reserved for experiments
468
    ME_HEX,         ///< hexagon based search
469
    ME_UMH,         ///< uneven multi-hexagon search
470
    ME_ITER,        ///< iterative search
471
    ME_TESA,        ///< transformed exhaustive search algorithm
472
};
473

    
474
enum AVDiscard{
475
    /* We leave some space between them for extensions (drop some
476
     * keyframes for intra-only or drop just some bidir frames). */
477
    AVDISCARD_NONE   =-16, ///< discard nothing
478
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
479
    AVDISCARD_NONREF =  8, ///< discard all non reference
480
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
481
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
482
    AVDISCARD_ALL    = 48, ///< discard all
483
};
484

    
485
enum AVColorPrimaries{
486
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
487
    AVCOL_PRI_UNSPECIFIED=2,
488
    AVCOL_PRI_BT470M     =4,
489
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
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    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
491
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
492
    AVCOL_PRI_FILM       =8,
493
    AVCOL_PRI_NB           , ///< Not part of ABI
494
};
495

    
496
enum AVColorTransferCharacteristic{
497
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
498
    AVCOL_TRC_UNSPECIFIED=2,
499
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
500
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
501
    AVCOL_TRC_NB           , ///< Not part of ABI
502
};
503

    
504
enum AVColorSpace{
505
    AVCOL_SPC_RGB        =0,
506
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
507
    AVCOL_SPC_UNSPECIFIED=2,
508
    AVCOL_SPC_FCC        =4,
509
    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
510
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
511
    AVCOL_SPC_SMPTE240M  =7,
512
    AVCOL_SPC_NB           , ///< Not part of ABI
513
};
514

    
515
enum AVColorRange{
516
    AVCOL_RANGE_UNSPECIFIED=0,
517
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
518
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
519
    AVCOL_RANGE_NB           , ///< Not part of ABI
520
};
521

    
522
/**
523
 *  X   X      3 4 X      X are luma samples,
524
 *             1 2        1-6 are possible chroma positions
525
 *  X   X      5 6 X      0 is undefined/unknown position
526
 */
527
enum AVChromaLocation{
528
    AVCHROMA_LOC_UNSPECIFIED=0,
529
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
530
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
531
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
532
    AVCHROMA_LOC_TOP        =4,
533
    AVCHROMA_LOC_BOTTOMLEFT =5,
534
    AVCHROMA_LOC_BOTTOM     =6,
535
    AVCHROMA_LOC_NB           , ///< Not part of ABI
536
};
537

    
538
/**
539
 * LPC analysis type
540
 */
541
enum AVLPCType {
542
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
543
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
544
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
545
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
546
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
547
    AV_LPC_TYPE_NB              , ///< Not part of ABI
548
};
549

    
550
enum AVAudioServiceType {
551
    AV_AUDIO_SERVICE_TYPE_MAIN              = 0,
552
    AV_AUDIO_SERVICE_TYPE_EFFECTS           = 1,
553
    AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
554
    AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED  = 3,
555
    AV_AUDIO_SERVICE_TYPE_DIALOGUE          = 4,
556
    AV_AUDIO_SERVICE_TYPE_COMMENTARY        = 5,
557
    AV_AUDIO_SERVICE_TYPE_EMERGENCY         = 6,
558
    AV_AUDIO_SERVICE_TYPE_VOICE_OVER        = 7,
559
    AV_AUDIO_SERVICE_TYPE_KARAOKE           = 8,
560
    AV_AUDIO_SERVICE_TYPE_NB                   , ///< Not part of ABI
561
};
562

    
563
typedef struct RcOverride{
564
    int start_frame;
565
    int end_frame;
566
    int qscale; // If this is 0 then quality_factor will be used instead.
567
    float quality_factor;
568
} RcOverride;
569

    
570
#define FF_MAX_B_FRAMES 16
571

    
572
/* encoding support
573
   These flags can be passed in AVCodecContext.flags before initialization.
574
   Note: Not everything is supported yet.
575
*/
576

    
577
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
578
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
579
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
580
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
581
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
582
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
583
/**
584
 * The parent program guarantees that the input for B-frames containing
585
 * streams is not written to for at least s->max_b_frames+1 frames, if
586
 * this is not set the input will be copied.
587
 */
588
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
589
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
590
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
591
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
592
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
593
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
594
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
595
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
596
                                                  location instead of only at frame boundaries. */
597
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
598
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
599
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
600
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
601
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
602
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
603
/* Fx : Flag for h263+ extra options */
604
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
605
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
606
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
607
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
608
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
609
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
610
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
611
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
612
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
613
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
614
#define CODEC_FLAG_CLOSED_GOP     0x80000000
615
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
616
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
617
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
618
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
619
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
620
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
621
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
622
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
623
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
624
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
625
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
626
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
627
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
628
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
629
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
630
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
631
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
632
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
633
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
634
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
635
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
636
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
637

    
638
/* Unsupported options :
639
 *              Syntax Arithmetic coding (SAC)
640
 *              Reference Picture Selection
641
 *              Independent Segment Decoding */
642
/* /Fx */
643
/* codec capabilities */
644

    
645
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
646
/**
647
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
648
 * If not set, it might not use get_buffer() at all or use operations that
649
 * assume the buffer was allocated by avcodec_default_get_buffer.
650
 */
651
#define CODEC_CAP_DR1             0x0002
652
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
653
#define CODEC_CAP_PARSE_ONLY      0x0004
654
#define CODEC_CAP_TRUNCATED       0x0008
655
/* Codec can export data for HW decoding (XvMC). */
656
#define CODEC_CAP_HWACCEL         0x0010
657
/**
658
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
659
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
660
 */
661
#define CODEC_CAP_DELAY           0x0020
662
/**
663
 * Codec can be fed a final frame with a smaller size.
664
 * This can be used to prevent truncation of the last audio samples.
665
 */
666
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
667
/**
668
 * Codec can export data for HW decoding (VDPAU).
669
 */
670
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
671
/**
672
 * Codec can output multiple frames per AVPacket
673
 * Normally demuxers return one frame at a time, demuxers which do not do
674
 * are connected to a parser to split what they return into proper frames.
675
 * This flag is reserved to the very rare category of codecs which have a
676
 * bitstream that cannot be split into frames without timeconsuming
677
 * operations like full decoding. Demuxers carring such bitstreams thus
678
 * may return multiple frames in a packet. This has many disadvantages like
679
 * prohibiting stream copy in many cases thus it should only be considered
680
 * as a last resort.
681
 */
682
#define CODEC_CAP_SUBFRAMES        0x0100
683
/**
684
 * Codec is experimental and is thus avoided in favor of non experimental
685
 * encoders
686
 */
687
#define CODEC_CAP_EXPERIMENTAL     0x0200
688
/**
689
 * Codec should fill in channel configuration and samplerate instead of container
690
 */
691
#define CODEC_CAP_CHANNEL_CONF     0x0400
692
/**
693
 * Codec is able to deal with negative linesizes
694
 */
695
#define CODEC_CAP_NEG_LINESIZES    0x0800
696
/**
697
 * Codec supports frame-level multithreading.
698
 */
699
#define CODEC_CAP_FRAME_THREADS    0x1000
700

    
701
//The following defines may change, don't expect compatibility if you use them.
702
#define MB_TYPE_INTRA4x4   0x0001
703
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
704
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
705
#define MB_TYPE_16x16      0x0008
706
#define MB_TYPE_16x8       0x0010
707
#define MB_TYPE_8x16       0x0020
708
#define MB_TYPE_8x8        0x0040
709
#define MB_TYPE_INTERLACED 0x0080
710
#define MB_TYPE_DIRECT2    0x0100 //FIXME
711
#define MB_TYPE_ACPRED     0x0200
712
#define MB_TYPE_GMC        0x0400
713
#define MB_TYPE_SKIP       0x0800
714
#define MB_TYPE_P0L0       0x1000
715
#define MB_TYPE_P1L0       0x2000
716
#define MB_TYPE_P0L1       0x4000
717
#define MB_TYPE_P1L1       0x8000
718
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
719
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
720
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
721
#define MB_TYPE_QUANT      0x00010000
722
#define MB_TYPE_CBP        0x00020000
723
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
724

    
725
/**
726
 * Pan Scan area.
727
 * This specifies the area which should be displayed.
728
 * Note there may be multiple such areas for one frame.
729
 */
730
typedef struct AVPanScan{
731
    /**
732
     * id
733
     * - encoding: Set by user.
734
     * - decoding: Set by libavcodec.
735
     */
736
    int id;
737

    
738
    /**
739
     * width and height in 1/16 pel
740
     * - encoding: Set by user.
741
     * - decoding: Set by libavcodec.
742
     */
743
    int width;
744
    int height;
745

    
746
    /**
747
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
748
     * - encoding: Set by user.
749
     * - decoding: Set by libavcodec.
750
     */
751
    int16_t position[3][2];
752
}AVPanScan;
753

    
754
#define FF_COMMON_FRAME \
755
    /**\
756
     * pointer to the picture planes.\
757
     * This might be different from the first allocated byte\
758
     * - encoding: \
759
     * - decoding: \
760
     */\
761
    uint8_t *data[4];\
762
    int linesize[4];\
763
    /**\
764
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
765
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
766
     * - encoding: \
767
     * - decoding: \
768
     */\
769
    uint8_t *base[4];\
770
    /**\
771
     * 1 -> keyframe, 0-> not\
772
     * - encoding: Set by libavcodec.\
773
     * - decoding: Set by libavcodec.\
774
     */\
775
    int key_frame;\
776
\
777
    /**\
778
     * Picture type of the frame, see ?_TYPE below.\
779
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
780
     * - decoding: Set by libavcodec.\
781
     */\
782
    int pict_type;\
783
\
784
    /**\
785
     * presentation timestamp in time_base units (time when frame should be shown to user)\
786
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
787
     * - encoding: MUST be set by user.\
788
     * - decoding: Set by libavcodec.\
789
     */\
790
    int64_t pts;\
791
\
792
    /**\
793
     * picture number in bitstream order\
794
     * - encoding: set by\
795
     * - decoding: Set by libavcodec.\
796
     */\
797
    int coded_picture_number;\
798
    /**\
799
     * picture number in display order\
800
     * - encoding: set by\
801
     * - decoding: Set by libavcodec.\
802
     */\
803
    int display_picture_number;\
804
\
805
    /**\
806
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
807
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
808
     * - decoding: Set by libavcodec.\
809
     */\
810
    int quality; \
811
\
812
    /**\
813
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
814
     * Set to INT_MAX if the buffer has not been used yet.\
815
     * - encoding: unused\
816
     * - decoding: MUST be set by get_buffer().\
817
     */\
818
    int age;\
819
\
820
    /**\
821
     * is this picture used as reference\
822
     * The values for this are the same as the MpegEncContext.picture_structure\
823
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
824
     * Set to 4 for delayed, non-reference frames.\
825
     * - encoding: unused\
826
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
827
     */\
828
    int reference;\
829
\
830
    /**\
831
     * QP table\
832
     * - encoding: unused\
833
     * - decoding: Set by libavcodec.\
834
     */\
835
    int8_t *qscale_table;\
836
    /**\
837
     * QP store stride\
838
     * - encoding: unused\
839
     * - decoding: Set by libavcodec.\
840
     */\
841
    int qstride;\
842
\
843
    /**\
844
     * mbskip_table[mb]>=1 if MB didn't change\
845
     * stride= mb_width = (width+15)>>4\
846
     * - encoding: unused\
847
     * - decoding: Set by libavcodec.\
848
     */\
849
    uint8_t *mbskip_table;\
850
\
851
    /**\
852
     * motion vector table\
853
     * @code\
854
     * example:\
855
     * int mv_sample_log2= 4 - motion_subsample_log2;\
856
     * int mb_width= (width+15)>>4;\
857
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
858
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
859
     * @endcode\
860
     * - encoding: Set by user.\
861
     * - decoding: Set by libavcodec.\
862
     */\
863
    int16_t (*motion_val[2])[2];\
864
\
865
    /**\
866
     * macroblock type table\
867
     * mb_type_base + mb_width + 2\
868
     * - encoding: Set by user.\
869
     * - decoding: Set by libavcodec.\
870
     */\
871
    uint32_t *mb_type;\
872
\
873
    /**\
874
     * log2 of the size of the block which a single vector in motion_val represents: \
875
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
876
     * - encoding: unused\
877
     * - decoding: Set by libavcodec.\
878
     */\
879
    uint8_t motion_subsample_log2;\
880
\
881
    /**\
882
     * for some private data of the user\
883
     * - encoding: unused\
884
     * - decoding: Set by user.\
885
     */\
886
    void *opaque;\
887
\
888
    /**\
889
     * error\
890
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
891
     * - decoding: unused\
892
     */\
893
    uint64_t error[4];\
894
\
895
    /**\
896
     * type of the buffer (to keep track of who has to deallocate data[*])\
897
     * - encoding: Set by the one who allocates it.\
898
     * - decoding: Set by the one who allocates it.\
899
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
900
     */\
901
    int type;\
902
    \
903
    /**\
904
     * When decoding, this signals how much the picture must be delayed.\
905
     * extra_delay = repeat_pict / (2*fps)\
906
     * - encoding: unused\
907
     * - decoding: Set by libavcodec.\
908
     */\
909
    int repeat_pict;\
910
    \
911
    /**\
912
     * \
913
     */\
914
    int qscale_type;\
915
    \
916
    /**\
917
     * The content of the picture is interlaced.\
918
     * - encoding: Set by user.\
919
     * - decoding: Set by libavcodec. (default 0)\
920
     */\
921
    int interlaced_frame;\
922
    \
923
    /**\
924
     * If the content is interlaced, is top field displayed first.\
925
     * - encoding: Set by user.\
926
     * - decoding: Set by libavcodec.\
927
     */\
928
    int top_field_first;\
929
    \
930
    /**\
931
     * Pan scan.\
932
     * - encoding: Set by user.\
933
     * - decoding: Set by libavcodec.\
934
     */\
935
    AVPanScan *pan_scan;\
936
    \
937
    /**\
938
     * Tell user application that palette has changed from previous frame.\
939
     * - encoding: ??? (no palette-enabled encoder yet)\
940
     * - decoding: Set by libavcodec. (default 0).\
941
     */\
942
    int palette_has_changed;\
943
    \
944
    /**\
945
     * codec suggestion on buffer type if != 0\
946
     * - encoding: unused\
947
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
948
     */\
949
    int buffer_hints;\
950
\
951
    /**\
952
     * DCT coefficients\
953
     * - encoding: unused\
954
     * - decoding: Set by libavcodec.\
955
     */\
956
    short *dct_coeff;\
957
\
958
    /**\
959
     * motion reference frame index\
960
     * the order in which these are stored can depend on the codec.\
961
     * - encoding: Set by user.\
962
     * - decoding: Set by libavcodec.\
963
     */\
964
    int8_t *ref_index[2];\
965
\
966
    /**\
967
     * reordered opaque 64bit (generally an integer or a double precision float\
968
     * PTS but can be anything). \
969
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
970
     * that time,\
971
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
972
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
973
     * @deprecated in favor of pkt_pts\
974
     * - encoding: unused\
975
     * - decoding: Read by user.\
976
     */\
977
    int64_t reordered_opaque;\
978
\
979
    /**\
980
     * hardware accelerator private data (FFmpeg allocated)\
981
     * - encoding: unused\
982
     * - decoding: Set by libavcodec\
983
     */\
984
    void *hwaccel_picture_private;\
985
\
986
    /**\
987
     * reordered pts from the last AVPacket that has been input into the decoder\
988
     * - encoding: unused\
989
     * - decoding: Read by user.\
990
     */\
991
    int64_t pkt_pts;\
992
\
993
    /**\
994
     * dts from the last AVPacket that has been input into the decoder\
995
     * - encoding: unused\
996
     * - decoding: Read by user.\
997
     */\
998
    int64_t pkt_dts;\
999
\
1000
    /**\
1001
     * the AVCodecContext which ff_thread_get_buffer() was last called on\
1002
     * - encoding: Set by libavcodec.\
1003
     * - decoding: Set by libavcodec.\
1004
     */\
1005
    struct AVCodecContext *owner;\
1006
\
1007
    /**\
1008
     * used by multithreading to store frame-specific info\
1009
     * - encoding: Set by libavcodec.\
1010
     * - decoding: Set by libavcodec.\
1011
     */\
1012
    void *thread_opaque;\
1013

    
1014
#define FF_QSCALE_TYPE_MPEG1 0
1015
#define FF_QSCALE_TYPE_MPEG2 1
1016
#define FF_QSCALE_TYPE_H264  2
1017
#define FF_QSCALE_TYPE_VP56  3
1018

    
1019
#define FF_BUFFER_TYPE_INTERNAL 1
1020
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1021
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1022
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1023

    
1024

    
1025
#define FF_I_TYPE  1 ///< Intra
1026
#define FF_P_TYPE  2 ///< Predicted
1027
#define FF_B_TYPE  3 ///< Bi-dir predicted
1028
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1029
#define FF_SI_TYPE 5 ///< Switching Intra
1030
#define FF_SP_TYPE 6 ///< Switching Predicted
1031
#define FF_BI_TYPE 7
1032

    
1033
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1034
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1035
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1036
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1037

    
1038
typedef struct AVPacket {
1039
    /**
1040
     * Presentation timestamp in AVStream->time_base units; the time at which
1041
     * the decompressed packet will be presented to the user.
1042
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1043
     * pts MUST be larger or equal to dts as presentation cannot happen before
1044
     * decompression, unless one wants to view hex dumps. Some formats misuse
1045
     * the terms dts and pts/cts to mean something different. Such timestamps
1046
     * must be converted to true pts/dts before they are stored in AVPacket.
1047
     */
1048
    int64_t pts;
1049
    /**
1050
     * Decompression timestamp in AVStream->time_base units; the time at which
1051
     * the packet is decompressed.
1052
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1053
     */
1054
    int64_t dts;
1055
    uint8_t *data;
1056
    int   size;
1057
    int   stream_index;
1058
    int   flags;
1059
    /**
1060
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1061
     * Equals next_pts - this_pts in presentation order.
1062
     */
1063
    int   duration;
1064
    void  (*destruct)(struct AVPacket *);
1065
    void  *priv;
1066
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1067

    
1068
    /**
1069
     * Time difference in AVStream->time_base units from the pts of this
1070
     * packet to the point at which the output from the decoder has converged
1071
     * independent from the availability of previous frames. That is, the
1072
     * frames are virtually identical no matter if decoding started from
1073
     * the very first frame or from this keyframe.
1074
     * Is AV_NOPTS_VALUE if unknown.
1075
     * This field is not the display duration of the current packet.
1076
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1077
     * set.
1078
     *
1079
     * The purpose of this field is to allow seeking in streams that have no
1080
     * keyframes in the conventional sense. It corresponds to the
1081
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1082
     * essential for some types of subtitle streams to ensure that all
1083
     * subtitles are correctly displayed after seeking.
1084
     */
1085
    int64_t convergence_duration;
1086
} AVPacket;
1087
#define AV_PKT_FLAG_KEY   0x0001
1088
#if LIBAVCODEC_VERSION_MAJOR < 53
1089
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1090
#endif
1091

    
1092
/**
1093
 * Audio Video Frame.
1094
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1095
 * bumps.
1096
 * Removal, reordering and changes to existing fields require a major
1097
 * version bump. No fields should be added into AVFrame before or after
1098
 * FF_COMMON_FRAME!
1099
 * sizeof(AVFrame) must not be used outside libav*.
1100
 */
1101
typedef struct AVFrame {
1102
    FF_COMMON_FRAME
1103
} AVFrame;
1104

    
1105
/**
1106
 * main external API structure.
1107
 * New fields can be added to the end with minor version bumps.
1108
 * Removal, reordering and changes to existing fields require a major
1109
 * version bump.
1110
 * sizeof(AVCodecContext) must not be used outside libav*.
1111
 */
1112
typedef struct AVCodecContext {
1113
    /**
1114
     * information on struct for av_log
1115
     * - set by avcodec_alloc_context
1116
     */
1117
    const AVClass *av_class;
1118
    /**
1119
     * the average bitrate
1120
     * - encoding: Set by user; unused for constant quantizer encoding.
1121
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1122
     */
1123
    int bit_rate;
1124

    
1125
    /**
1126
     * number of bits the bitstream is allowed to diverge from the reference.
1127
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1128
     * - encoding: Set by user; unused for constant quantizer encoding.
1129
     * - decoding: unused
1130
     */
1131
    int bit_rate_tolerance;
1132

    
1133
    /**
1134
     * CODEC_FLAG_*.
1135
     * - encoding: Set by user.
1136
     * - decoding: Set by user.
1137
     */
1138
    int flags;
1139

    
1140
    /**
1141
     * Some codecs need additional format info. It is stored here.
1142
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1143
     * specific codec MUST set it correctly otherwise stream copy breaks.
1144
     * In general use of this field by muxers is not recommanded.
1145
     * - encoding: Set by libavcodec.
1146
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1147
     */
1148
    int sub_id;
1149

    
1150
    /**
1151
     * Motion estimation algorithm used for video coding.
1152
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1153
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1154
     * - encoding: MUST be set by user.
1155
     * - decoding: unused
1156
     */
1157
    int me_method;
1158

    
1159
    /**
1160
     * some codecs need / can use extradata like Huffman tables.
1161
     * mjpeg: Huffman tables
1162
     * rv10: additional flags
1163
     * mpeg4: global headers (they can be in the bitstream or here)
1164
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1165
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1166
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1167
     * - encoding: Set/allocated/freed by libavcodec.
1168
     * - decoding: Set/allocated/freed by user.
1169
     */
1170
    uint8_t *extradata;
1171
    int extradata_size;
1172

    
1173
    /**
1174
     * This is the fundamental unit of time (in seconds) in terms
1175
     * of which frame timestamps are represented. For fixed-fps content,
1176
     * timebase should be 1/framerate and timestamp increments should be
1177
     * identically 1.
1178
     * - encoding: MUST be set by user.
1179
     * - decoding: Set by libavcodec.
1180
     */
1181
    AVRational time_base;
1182

    
1183
    /* video only */
1184
    /**
1185
     * picture width / height.
1186
     * - encoding: MUST be set by user.
1187
     * - decoding: Set by libavcodec.
1188
     * Note: For compatibility it is possible to set this instead of
1189
     * coded_width/height before decoding.
1190
     */
1191
    int width, height;
1192

    
1193
#define FF_ASPECT_EXTENDED 15
1194

    
1195
    /**
1196
     * the number of pictures in a group of pictures, or 0 for intra_only
1197
     * - encoding: Set by user.
1198
     * - decoding: unused
1199
     */
1200
    int gop_size;
1201

    
1202
    /**
1203
     * Pixel format, see PIX_FMT_xxx.
1204
     * May be set by the demuxer if known from headers.
1205
     * May be overriden by the decoder if it knows better.
1206
     * - encoding: Set by user.
1207
     * - decoding: Set by user if known, overridden by libavcodec if known
1208
     */
1209
    enum PixelFormat pix_fmt;
1210

    
1211
    /**
1212
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1213
     * has to read frames at native frame rate.
1214
     * - encoding: Set by user.
1215
     * - decoding: unused
1216
     */
1217
    int rate_emu;
1218

    
1219
    /**
1220
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1221
     * decoder to draw a horizontal band. It improves cache usage. Not
1222
     * all codecs can do that. You must check the codec capabilities
1223
     * beforehand.
1224
     * When multithreading is used, it may be called from multiple threads
1225
     * at the same time; threads might draw different parts of the same AVFrame,
1226
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1227
     * in order.
1228
     * The function is also used by hardware acceleration APIs.
1229
     * It is called at least once during frame decoding to pass
1230
     * the data needed for hardware render.
1231
     * In that mode instead of pixel data, AVFrame points to
1232
     * a structure specific to the acceleration API. The application
1233
     * reads the structure and can change some fields to indicate progress
1234
     * or mark state.
1235
     * - encoding: unused
1236
     * - decoding: Set by user.
1237
     * @param height the height of the slice
1238
     * @param y the y position of the slice
1239
     * @param type 1->top field, 2->bottom field, 3->frame
1240
     * @param offset offset into the AVFrame.data from which the slice should be read
1241
     */
1242
    void (*draw_horiz_band)(struct AVCodecContext *s,
1243
                            const AVFrame *src, int offset[4],
1244
                            int y, int type, int height);
1245

    
1246
    /* audio only */
1247
    int sample_rate; ///< samples per second
1248
    int channels;    ///< number of audio channels
1249

    
1250
    /**
1251
     * audio sample format
1252
     * - encoding: Set by user.
1253
     * - decoding: Set by libavcodec.
1254
     */
1255
    enum AVSampleFormat sample_fmt;  ///< sample format
1256

    
1257
    /* The following data should not be initialized. */
1258
    /**
1259
     * Samples per packet, initialized when calling 'init'.
1260
     */
1261
    int frame_size;
1262
    int frame_number;   ///< audio or video frame number
1263
#if LIBAVCODEC_VERSION_MAJOR < 53
1264
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1265
#endif
1266

    
1267
    /**
1268
     * Number of frames the decoded output will be delayed relative to
1269
     * the encoded input.
1270
     * - encoding: Set by libavcodec.
1271
     * - decoding: unused
1272
     */
1273
    int delay;
1274

    
1275
    /* - encoding parameters */
1276
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1277
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1278

    
1279
    /**
1280
     * minimum quantizer
1281
     * - encoding: Set by user.
1282
     * - decoding: unused
1283
     */
1284
    int qmin;
1285

    
1286
    /**
1287
     * maximum quantizer
1288
     * - encoding: Set by user.
1289
     * - decoding: unused
1290
     */
1291
    int qmax;
1292

    
1293
    /**
1294
     * maximum quantizer difference between frames
1295
     * - encoding: Set by user.
1296
     * - decoding: unused
1297
     */
1298
    int max_qdiff;
1299

    
1300
    /**
1301
     * maximum number of B-frames between non-B-frames
1302
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1303
     * - encoding: Set by user.
1304
     * - decoding: unused
1305
     */
1306
    int max_b_frames;
1307

    
1308
    /**
1309
     * qscale factor between IP and B-frames
1310
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1311
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1312
     * - encoding: Set by user.
1313
     * - decoding: unused
1314
     */
1315
    float b_quant_factor;
1316

    
1317
    /** obsolete FIXME remove */
1318
    int rc_strategy;
1319
#define FF_RC_STRATEGY_XVID 1
1320

    
1321
    int b_frame_strategy;
1322

    
1323
#if FF_API_HURRY_UP
1324
    /**
1325
     * hurry up amount
1326
     * - encoding: unused
1327
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1328
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1329
     */
1330
    attribute_deprecated int hurry_up;
1331
#endif
1332

    
1333
    struct AVCodec *codec;
1334

    
1335
    void *priv_data;
1336

    
1337
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1338
                            /* do its best to deliver a chunk with size     */
1339
                            /* below rtp_payload_size, the chunk will start */
1340
                            /* with a start code on some codecs like H.263. */
1341
                            /* This doesn't take account of any particular  */
1342
                            /* headers inside the transmitted RTP payload.  */
1343

    
1344

    
1345
    /* The RTP callback: This function is called    */
1346
    /* every time the encoder has a packet to send. */
1347
    /* It depends on the encoder if the data starts */
1348
    /* with a Start Code (it should). H.263 does.   */
1349
    /* mb_nb contains the number of macroblocks     */
1350
    /* encoded in the RTP payload.                  */
1351
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1352

    
1353
    /* statistics, used for 2-pass encoding */
1354
    int mv_bits;
1355
    int header_bits;
1356
    int i_tex_bits;
1357
    int p_tex_bits;
1358
    int i_count;
1359
    int p_count;
1360
    int skip_count;
1361
    int misc_bits;
1362

    
1363
    /**
1364
     * number of bits used for the previously encoded frame
1365
     * - encoding: Set by libavcodec.
1366
     * - decoding: unused
1367
     */
1368
    int frame_bits;
1369

    
1370
    /**
1371
     * Private data of the user, can be used to carry app specific stuff.
1372
     * - encoding: Set by user.
1373
     * - decoding: Set by user.
1374
     */
1375
    void *opaque;
1376

    
1377
    char codec_name[32];
1378
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1379
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1380

    
1381
    /**
1382
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1383
     * This is used to work around some encoder bugs.
1384
     * A demuxer should set this to what is stored in the field used to identify the codec.
1385
     * If there are multiple such fields in a container then the demuxer should choose the one
1386
     * which maximizes the information about the used codec.
1387
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1388
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1389
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1390
     * first.
1391
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1392
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1393
     */
1394
    unsigned int codec_tag;
1395

    
1396
    /**
1397
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1398
     * - encoding: Set by user
1399
     * - decoding: Set by user
1400
     */
1401
    int workaround_bugs;
1402
#define FF_BUG_AUTODETECT       1  ///< autodetection
1403
#define FF_BUG_OLD_MSMPEG4      2
1404
#define FF_BUG_XVID_ILACE       4
1405
#define FF_BUG_UMP4             8
1406
#define FF_BUG_NO_PADDING       16
1407
#define FF_BUG_AMV              32
1408
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1409
#define FF_BUG_QPEL_CHROMA      64
1410
#define FF_BUG_STD_QPEL         128
1411
#define FF_BUG_QPEL_CHROMA2     256
1412
#define FF_BUG_DIRECT_BLOCKSIZE 512
1413
#define FF_BUG_EDGE             1024
1414
#define FF_BUG_HPEL_CHROMA      2048
1415
#define FF_BUG_DC_CLIP          4096
1416
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1417
#define FF_BUG_TRUNCATED       16384
1418
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1419

    
1420
    /**
1421
     * luma single coefficient elimination threshold
1422
     * - encoding: Set by user.
1423
     * - decoding: unused
1424
     */
1425
    int luma_elim_threshold;
1426

    
1427
    /**
1428
     * chroma single coeff elimination threshold
1429
     * - encoding: Set by user.
1430
     * - decoding: unused
1431
     */
1432
    int chroma_elim_threshold;
1433

    
1434
    /**
1435
     * strictly follow the standard (MPEG4, ...).
1436
     * - encoding: Set by user.
1437
     * - decoding: Set by user.
1438
     * Setting this to STRICT or higher means the encoder and decoder will
1439
     * generally do stupid things, whereas setting it to unofficial or lower
1440
     * will mean the encoder might produce output that is not supported by all
1441
     * spec-compliant decoders. Decoders don't differentiate between normal,
1442
     * unofficial and experimental (that is, they always try to decode things
1443
     * when they can) unless they are explicitly asked to behave stupidly
1444
     * (=strictly conform to the specs)
1445
     */
1446
    int strict_std_compliance;
1447
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1448
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1449
#define FF_COMPLIANCE_NORMAL        0
1450
#if FF_API_INOFFICIAL
1451
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1452
#endif
1453
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1454
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1455

    
1456
    /**
1457
     * qscale offset between IP and B-frames
1458
     * - encoding: Set by user.
1459
     * - decoding: unused
1460
     */
1461
    float b_quant_offset;
1462

    
1463
    /**
1464
     * Error recognization; higher values will detect more errors but may
1465
     * misdetect some more or less valid parts as errors.
1466
     * - encoding: unused
1467
     * - decoding: Set by user.
1468
     */
1469
    int error_recognition;
1470
#define FF_ER_CAREFUL         1
1471
#define FF_ER_COMPLIANT       2
1472
#define FF_ER_AGGRESSIVE      3
1473
#define FF_ER_VERY_AGGRESSIVE 4
1474

    
1475
    /**
1476
     * Called at the beginning of each frame to get a buffer for it.
1477
     * If pic.reference is set then the frame will be read later by libavcodec.
1478
     * avcodec_align_dimensions2() should be used to find the required width and
1479
     * height, as they normally need to be rounded up to the next multiple of 16.
1480
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1481
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1482
     * some other means.
1483
     * If frame multithreading is used and thread_safe_callbacks is set,
1484
     * it may be called from a different thread, but not from more than one at once.
1485
     * Does not need to be reentrant.
1486
     * - encoding: unused
1487
     * - decoding: Set by libavcodec, user can override.
1488
     */
1489
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1490

    
1491
    /**
1492
     * Called to release buffers which were allocated with get_buffer.
1493
     * A released buffer can be reused in get_buffer().
1494
     * pic.data[*] must be set to NULL.
1495
     * May be called from a different thread if frame multithreading is used,
1496
     * but not by more than one thread at once, so does not need to be reentrant.
1497
     * - encoding: unused
1498
     * - decoding: Set by libavcodec, user can override.
1499
     */
1500
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1501

    
1502
    /**
1503
     * Size of the frame reordering buffer in the decoder.
1504
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1505
     * - encoding: Set by libavcodec.
1506
     * - decoding: Set by libavcodec.
1507
     */
1508
    int has_b_frames;
1509

    
1510
    /**
1511
     * number of bytes per packet if constant and known or 0
1512
     * Used by some WAV based audio codecs.
1513
     */
1514
    int block_align;
1515

    
1516
    int parse_only; /* - decoding only: If true, only parsing is done
1517
                       (function avcodec_parse_frame()). The frame
1518
                       data is returned. Only MPEG codecs support this now. */
1519

    
1520
    /**
1521
     * 0-> h263 quant 1-> mpeg quant
1522
     * - encoding: Set by user.
1523
     * - decoding: unused
1524
     */
1525
    int mpeg_quant;
1526

    
1527
    /**
1528
     * pass1 encoding statistics output buffer
1529
     * - encoding: Set by libavcodec.
1530
     * - decoding: unused
1531
     */
1532
    char *stats_out;
1533

    
1534
    /**
1535
     * pass2 encoding statistics input buffer
1536
     * Concatenated stuff from stats_out of pass1 should be placed here.
1537
     * - encoding: Allocated/set/freed by user.
1538
     * - decoding: unused
1539
     */
1540
    char *stats_in;
1541

    
1542
    /**
1543
     * ratecontrol qmin qmax limiting method
1544
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1545
     * - encoding: Set by user.
1546
     * - decoding: unused
1547
     */
1548
    float rc_qsquish;
1549

    
1550
    float rc_qmod_amp;
1551
    int rc_qmod_freq;
1552

    
1553
    /**
1554
     * ratecontrol override, see RcOverride
1555
     * - encoding: Allocated/set/freed by user.
1556
     * - decoding: unused
1557
     */
1558
    RcOverride *rc_override;
1559
    int rc_override_count;
1560

    
1561
    /**
1562
     * rate control equation
1563
     * - encoding: Set by user
1564
     * - decoding: unused
1565
     */
1566
    const char *rc_eq;
1567

    
1568
    /**
1569
     * maximum bitrate
1570
     * - encoding: Set by user.
1571
     * - decoding: unused
1572
     */
1573
    int rc_max_rate;
1574

    
1575
    /**
1576
     * minimum bitrate
1577
     * - encoding: Set by user.
1578
     * - decoding: unused
1579
     */
1580
    int rc_min_rate;
1581

    
1582
    /**
1583
     * decoder bitstream buffer size
1584
     * - encoding: Set by user.
1585
     * - decoding: unused
1586
     */
1587
    int rc_buffer_size;
1588
    float rc_buffer_aggressivity;
1589

    
1590
    /**
1591
     * qscale factor between P and I-frames
1592
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1593
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1594
     * - encoding: Set by user.
1595
     * - decoding: unused
1596
     */
1597
    float i_quant_factor;
1598

    
1599
    /**
1600
     * qscale offset between P and I-frames
1601
     * - encoding: Set by user.
1602
     * - decoding: unused
1603
     */
1604
    float i_quant_offset;
1605

    
1606
    /**
1607
     * initial complexity for pass1 ratecontrol
1608
     * - encoding: Set by user.
1609
     * - decoding: unused
1610
     */
1611
    float rc_initial_cplx;
1612

    
1613
    /**
1614
     * DCT algorithm, see FF_DCT_* below
1615
     * - encoding: Set by user.
1616
     * - decoding: unused
1617
     */
1618
    int dct_algo;
1619
#define FF_DCT_AUTO    0
1620
#define FF_DCT_FASTINT 1
1621
#define FF_DCT_INT     2
1622
#define FF_DCT_MMX     3
1623
#define FF_DCT_MLIB    4
1624
#define FF_DCT_ALTIVEC 5
1625
#define FF_DCT_FAAN    6
1626

    
1627
    /**
1628
     * luminance masking (0-> disabled)
1629
     * - encoding: Set by user.
1630
     * - decoding: unused
1631
     */
1632
    float lumi_masking;
1633

    
1634
    /**
1635
     * temporary complexity masking (0-> disabled)
1636
     * - encoding: Set by user.
1637
     * - decoding: unused
1638
     */
1639
    float temporal_cplx_masking;
1640

    
1641
    /**
1642
     * spatial complexity masking (0-> disabled)
1643
     * - encoding: Set by user.
1644
     * - decoding: unused
1645
     */
1646
    float spatial_cplx_masking;
1647

    
1648
    /**
1649
     * p block masking (0-> disabled)
1650
     * - encoding: Set by user.
1651
     * - decoding: unused
1652
     */
1653
    float p_masking;
1654

    
1655
    /**
1656
     * darkness masking (0-> disabled)
1657
     * - encoding: Set by user.
1658
     * - decoding: unused
1659
     */
1660
    float dark_masking;
1661

    
1662
    /**
1663
     * IDCT algorithm, see FF_IDCT_* below.
1664
     * - encoding: Set by user.
1665
     * - decoding: Set by user.
1666
     */
1667
    int idct_algo;
1668
#define FF_IDCT_AUTO          0
1669
#define FF_IDCT_INT           1
1670
#define FF_IDCT_SIMPLE        2
1671
#define FF_IDCT_SIMPLEMMX     3
1672
#define FF_IDCT_LIBMPEG2MMX   4
1673
#define FF_IDCT_PS2           5
1674
#define FF_IDCT_MLIB          6
1675
#define FF_IDCT_ARM           7
1676
#define FF_IDCT_ALTIVEC       8
1677
#define FF_IDCT_SH4           9
1678
#define FF_IDCT_SIMPLEARM     10
1679
#define FF_IDCT_H264          11
1680
#define FF_IDCT_VP3           12
1681
#define FF_IDCT_IPP           13
1682
#define FF_IDCT_XVIDMMX       14
1683
#define FF_IDCT_CAVS          15
1684
#define FF_IDCT_SIMPLEARMV5TE 16
1685
#define FF_IDCT_SIMPLEARMV6   17
1686
#define FF_IDCT_SIMPLEVIS     18
1687
#define FF_IDCT_WMV2          19
1688
#define FF_IDCT_FAAN          20
1689
#define FF_IDCT_EA            21
1690
#define FF_IDCT_SIMPLENEON    22
1691
#define FF_IDCT_SIMPLEALPHA   23
1692
#define FF_IDCT_BINK          24
1693

    
1694
    /**
1695
     * slice count
1696
     * - encoding: Set by libavcodec.
1697
     * - decoding: Set by user (or 0).
1698
     */
1699
    int slice_count;
1700
    /**
1701
     * slice offsets in the frame in bytes
1702
     * - encoding: Set/allocated by libavcodec.
1703
     * - decoding: Set/allocated by user (or NULL).
1704
     */
1705
    int *slice_offset;
1706

    
1707
    /**
1708
     * error concealment flags
1709
     * - encoding: unused
1710
     * - decoding: Set by user.
1711
     */
1712
    int error_concealment;
1713
#define FF_EC_GUESS_MVS   1
1714
#define FF_EC_DEBLOCK     2
1715

    
1716
    /**
1717
     * dsp_mask could be add used to disable unwanted CPU features
1718
     * CPU features (i.e. MMX, SSE. ...)
1719
     *
1720
     * With the FORCE flag you may instead enable given CPU features.
1721
     * (Dangerous: Usable in case of misdetection, improper usage however will
1722
     * result into program crash.)
1723
     */
1724
    unsigned dsp_mask;
1725

    
1726
#if FF_API_MM_FLAGS
1727
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1728
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1729
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1730
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1731
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1732
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1733
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1734
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1735
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1736
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1737
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1738
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1739
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1740
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1741
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1742
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1743
#endif
1744

    
1745
    /**
1746
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1747
     * - encoding: Set by libavcodec.
1748
     * - decoding: Set by user.
1749
     */
1750
     int bits_per_coded_sample;
1751

    
1752
    /**
1753
     * prediction method (needed for huffyuv)
1754
     * - encoding: Set by user.
1755
     * - decoding: unused
1756
     */
1757
     int prediction_method;
1758
#define FF_PRED_LEFT   0
1759
#define FF_PRED_PLANE  1
1760
#define FF_PRED_MEDIAN 2
1761

    
1762
    /**
1763
     * sample aspect ratio (0 if unknown)
1764
     * That is the width of a pixel divided by the height of the pixel.
1765
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1766
     * - encoding: Set by user.
1767
     * - decoding: Set by libavcodec.
1768
     */
1769
    AVRational sample_aspect_ratio;
1770

    
1771
    /**
1772
     * the picture in the bitstream
1773
     * - encoding: Set by libavcodec.
1774
     * - decoding: Set by libavcodec.
1775
     */
1776
    AVFrame *coded_frame;
1777

    
1778
    /**
1779
     * debug
1780
     * - encoding: Set by user.
1781
     * - decoding: Set by user.
1782
     */
1783
    int debug;
1784
#define FF_DEBUG_PICT_INFO   1
1785
#define FF_DEBUG_RC          2
1786
#define FF_DEBUG_BITSTREAM   4
1787
#define FF_DEBUG_MB_TYPE     8
1788
#define FF_DEBUG_QP          16
1789
#define FF_DEBUG_MV          32
1790
#define FF_DEBUG_DCT_COEFF   0x00000040
1791
#define FF_DEBUG_SKIP        0x00000080
1792
#define FF_DEBUG_STARTCODE   0x00000100
1793
#define FF_DEBUG_PTS         0x00000200
1794
#define FF_DEBUG_ER          0x00000400
1795
#define FF_DEBUG_MMCO        0x00000800
1796
#define FF_DEBUG_BUGS        0x00001000
1797
#define FF_DEBUG_VIS_QP      0x00002000
1798
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1799
#define FF_DEBUG_BUFFERS     0x00008000
1800
#define FF_DEBUG_THREADS     0x00010000
1801

    
1802
    /**
1803
     * debug
1804
     * - encoding: Set by user.
1805
     * - decoding: Set by user.
1806
     */
1807
    int debug_mv;
1808
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1809
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1810
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1811

    
1812
    /**
1813
     * error
1814
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1815
     * - decoding: unused
1816
     */
1817
    uint64_t error[4];
1818

    
1819
    /**
1820
     * minimum MB quantizer
1821
     * - encoding: unused
1822
     * - decoding: unused
1823
     */
1824
    int mb_qmin;
1825

    
1826
    /**
1827
     * maximum MB quantizer
1828
     * - encoding: unused
1829
     * - decoding: unused
1830
     */
1831
    int mb_qmax;
1832

    
1833
    /**
1834
     * motion estimation comparison function
1835
     * - encoding: Set by user.
1836
     * - decoding: unused
1837
     */
1838
    int me_cmp;
1839
    /**
1840
     * subpixel motion estimation comparison function
1841
     * - encoding: Set by user.
1842
     * - decoding: unused
1843
     */
1844
    int me_sub_cmp;
1845
    /**
1846
     * macroblock comparison function (not supported yet)
1847
     * - encoding: Set by user.
1848
     * - decoding: unused
1849
     */
1850
    int mb_cmp;
1851
    /**
1852
     * interlaced DCT comparison function
1853
     * - encoding: Set by user.
1854
     * - decoding: unused
1855
     */
1856
    int ildct_cmp;
1857
#define FF_CMP_SAD    0
1858
#define FF_CMP_SSE    1
1859
#define FF_CMP_SATD   2
1860
#define FF_CMP_DCT    3
1861
#define FF_CMP_PSNR   4
1862
#define FF_CMP_BIT    5
1863
#define FF_CMP_RD     6
1864
#define FF_CMP_ZERO   7
1865
#define FF_CMP_VSAD   8
1866
#define FF_CMP_VSSE   9
1867
#define FF_CMP_NSSE   10
1868
#define FF_CMP_W53    11
1869
#define FF_CMP_W97    12
1870
#define FF_CMP_DCTMAX 13
1871
#define FF_CMP_DCT264 14
1872
#define FF_CMP_CHROMA 256
1873

    
1874
    /**
1875
     * ME diamond size & shape
1876
     * - encoding: Set by user.
1877
     * - decoding: unused
1878
     */
1879
    int dia_size;
1880

    
1881
    /**
1882
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1883
     * - encoding: Set by user.
1884
     * - decoding: unused
1885
     */
1886
    int last_predictor_count;
1887

    
1888
    /**
1889
     * prepass for motion estimation
1890
     * - encoding: Set by user.
1891
     * - decoding: unused
1892
     */
1893
    int pre_me;
1894

    
1895
    /**
1896
     * motion estimation prepass comparison function
1897
     * - encoding: Set by user.
1898
     * - decoding: unused
1899
     */
1900
    int me_pre_cmp;
1901

    
1902
    /**
1903
     * ME prepass diamond size & shape
1904
     * - encoding: Set by user.
1905
     * - decoding: unused
1906
     */
1907
    int pre_dia_size;
1908

    
1909
    /**
1910
     * subpel ME quality
1911
     * - encoding: Set by user.
1912
     * - decoding: unused
1913
     */
1914
    int me_subpel_quality;
1915

    
1916
    /**
1917
     * callback to negotiate the pixelFormat
1918
     * @param fmt is the list of formats which are supported by the codec,
1919
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1920
     * The first is always the native one.
1921
     * @return the chosen format
1922
     * - encoding: unused
1923
     * - decoding: Set by user, if not set the native format will be chosen.
1924
     */
1925
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1926

    
1927
    /**
1928
     * DTG active format information (additional aspect ratio
1929
     * information only used in DVB MPEG-2 transport streams)
1930
     * 0 if not set.
1931
     *
1932
     * - encoding: unused
1933
     * - decoding: Set by decoder.
1934
     */
1935
    int dtg_active_format;
1936
#define FF_DTG_AFD_SAME         8
1937
#define FF_DTG_AFD_4_3          9
1938
#define FF_DTG_AFD_16_9         10
1939
#define FF_DTG_AFD_14_9         11
1940
#define FF_DTG_AFD_4_3_SP_14_9  13
1941
#define FF_DTG_AFD_16_9_SP_14_9 14
1942
#define FF_DTG_AFD_SP_4_3       15
1943

    
1944
    /**
1945
     * maximum motion estimation search range in subpel units
1946
     * If 0 then no limit.
1947
     *
1948
     * - encoding: Set by user.
1949
     * - decoding: unused
1950
     */
1951
    int me_range;
1952

    
1953
    /**
1954
     * intra quantizer bias
1955
     * - encoding: Set by user.
1956
     * - decoding: unused
1957
     */
1958
    int intra_quant_bias;
1959
#define FF_DEFAULT_QUANT_BIAS 999999
1960

    
1961
    /**
1962
     * inter quantizer bias
1963
     * - encoding: Set by user.
1964
     * - decoding: unused
1965
     */
1966
    int inter_quant_bias;
1967

    
1968
    /**
1969
     * color table ID
1970
     * - encoding: unused
1971
     * - decoding: Which clrtable should be used for 8bit RGB images.
1972
     *             Tables have to be stored somewhere. FIXME
1973
     */
1974
    int color_table_id;
1975

    
1976
    /**
1977
     * internal_buffer count
1978
     * Don't touch, used by libavcodec default_get_buffer().
1979
     */
1980
    int internal_buffer_count;
1981

    
1982
    /**
1983
     * internal_buffers
1984
     * Don't touch, used by libavcodec default_get_buffer().
1985
     */
1986
    void *internal_buffer;
1987

    
1988
    /**
1989
     * Global quality for codecs which cannot change it per frame.
1990
     * This should be proportional to MPEG-1/2/4 qscale.
1991
     * - encoding: Set by user.
1992
     * - decoding: unused
1993
     */
1994
    int global_quality;
1995

    
1996
#define FF_CODER_TYPE_VLC       0
1997
#define FF_CODER_TYPE_AC        1
1998
#define FF_CODER_TYPE_RAW       2
1999
#define FF_CODER_TYPE_RLE       3
2000
#define FF_CODER_TYPE_DEFLATE   4
2001
    /**
2002
     * coder type
2003
     * - encoding: Set by user.
2004
     * - decoding: unused
2005
     */
2006
    int coder_type;
2007

    
2008
    /**
2009
     * context model
2010
     * - encoding: Set by user.
2011
     * - decoding: unused
2012
     */
2013
    int context_model;
2014
#if 0
2015
    /**
2016
     *
2017
     * - encoding: unused
2018
     * - decoding: Set by user.
2019
     */
2020
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2021
#endif
2022

    
2023
    /**
2024
     * slice flags
2025
     * - encoding: unused
2026
     * - decoding: Set by user.
2027
     */
2028
    int slice_flags;
2029
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2030
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2031
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2032

    
2033
    /**
2034
     * XVideo Motion Acceleration
2035
     * - encoding: forbidden
2036
     * - decoding: set by decoder
2037
     */
2038
    int xvmc_acceleration;
2039

    
2040
    /**
2041
     * macroblock decision mode
2042
     * - encoding: Set by user.
2043
     * - decoding: unused
2044
     */
2045
    int mb_decision;
2046
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2047
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2048
#define FF_MB_DECISION_RD     2        ///< rate distortion
2049

    
2050
    /**
2051
     * custom intra quantization matrix
2052
     * - encoding: Set by user, can be NULL.
2053
     * - decoding: Set by libavcodec.
2054
     */
2055
    uint16_t *intra_matrix;
2056

    
2057
    /**
2058
     * custom inter quantization matrix
2059
     * - encoding: Set by user, can be NULL.
2060
     * - decoding: Set by libavcodec.
2061
     */
2062
    uint16_t *inter_matrix;
2063

    
2064
    /**
2065
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2066
     * This is used to work around some encoder bugs.
2067
     * - encoding: unused
2068
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2069
     */
2070
    unsigned int stream_codec_tag;
2071

    
2072
    /**
2073
     * scene change detection threshold
2074
     * 0 is default, larger means fewer detected scene changes.
2075
     * - encoding: Set by user.
2076
     * - decoding: unused
2077
     */
2078
    int scenechange_threshold;
2079

    
2080
    /**
2081
     * minimum Lagrange multipler
2082
     * - encoding: Set by user.
2083
     * - decoding: unused
2084
     */
2085
    int lmin;
2086

    
2087
    /**
2088
     * maximum Lagrange multipler
2089
     * - encoding: Set by user.
2090
     * - decoding: unused
2091
     */
2092
    int lmax;
2093

    
2094
#if FF_API_PALETTE_CONTROL
2095
    /**
2096
     * palette control structure
2097
     * - encoding: ??? (no palette-enabled encoder yet)
2098
     * - decoding: Set by user.
2099
     */
2100
    struct AVPaletteControl *palctrl;
2101
#endif
2102

    
2103
    /**
2104
     * noise reduction strength
2105
     * - encoding: Set by user.
2106
     * - decoding: unused
2107
     */
2108
    int noise_reduction;
2109

    
2110
    /**
2111
     * Called at the beginning of a frame to get cr buffer for it.
2112
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2113
     * libavcodec will pass previous buffer in pic, function should return
2114
     * same buffer or new buffer with old frame "painted" into it.
2115
     * If pic.data[0] == NULL must behave like get_buffer().
2116
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2117
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2118
     * some other means.
2119
     * - encoding: unused
2120
     * - decoding: Set by libavcodec, user can override.
2121
     */
2122
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2123

    
2124
    /**
2125
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2126
     * - encoding: Set by user.
2127
     * - decoding: unused
2128
     */
2129
    int rc_initial_buffer_occupancy;
2130

    
2131
    /**
2132
     *
2133
     * - encoding: Set by user.
2134
     * - decoding: unused
2135
     */
2136
    int inter_threshold;
2137

    
2138
    /**
2139
     * CODEC_FLAG2_*
2140
     * - encoding: Set by user.
2141
     * - decoding: Set by user.
2142
     */
2143
    int flags2;
2144

    
2145
    /**
2146
     * Simulates errors in the bitstream to test error concealment.
2147
     * - encoding: Set by user.
2148
     * - decoding: unused
2149
     */
2150
    int error_rate;
2151

    
2152
    /**
2153
     * MP3 antialias algorithm, see FF_AA_* below.
2154
     * - encoding: unused
2155
     * - decoding: Set by user.
2156
     */
2157
    int antialias_algo;
2158
#define FF_AA_AUTO    0
2159
#define FF_AA_FASTINT 1 //not implemented yet
2160
#define FF_AA_INT     2
2161
#define FF_AA_FLOAT   3
2162
    /**
2163
     * quantizer noise shaping
2164
     * - encoding: Set by user.
2165
     * - decoding: unused
2166
     */
2167
    int quantizer_noise_shaping;
2168

    
2169
    /**
2170
     * thread count
2171
     * is used to decide how many independent tasks should be passed to execute()
2172
     * - encoding: Set by user.
2173
     * - decoding: Set by user.
2174
     */
2175
    int thread_count;
2176

    
2177
    /**
2178
     * The codec may call this to execute several independent things.
2179
     * It will return only after finishing all tasks.
2180
     * The user may replace this with some multithreaded implementation,
2181
     * the default implementation will execute the parts serially.
2182
     * @param count the number of things to execute
2183
     * - encoding: Set by libavcodec, user can override.
2184
     * - decoding: Set by libavcodec, user can override.
2185
     */
2186
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2187

    
2188
    /**
2189
     * thread opaque
2190
     * Can be used by execute() to store some per AVCodecContext stuff.
2191
     * - encoding: set by execute()
2192
     * - decoding: set by execute()
2193
     */
2194
    void *thread_opaque;
2195

    
2196
    /**
2197
     * Motion estimation threshold below which no motion estimation is
2198
     * performed, but instead the user specified motion vectors are used.
2199
     *
2200
     * - encoding: Set by user.
2201
     * - decoding: unused
2202
     */
2203
     int me_threshold;
2204

    
2205
    /**
2206
     * Macroblock threshold below which the user specified macroblock types will be used.
2207
     * - encoding: Set by user.
2208
     * - decoding: unused
2209
     */
2210
     int mb_threshold;
2211

    
2212
    /**
2213
     * precision of the intra DC coefficient - 8
2214
     * - encoding: Set by user.
2215
     * - decoding: unused
2216
     */
2217
     int intra_dc_precision;
2218

    
2219
    /**
2220
     * noise vs. sse weight for the nsse comparsion function
2221
     * - encoding: Set by user.
2222
     * - decoding: unused
2223
     */
2224
     int nsse_weight;
2225

    
2226
    /**
2227
     * Number of macroblock rows at the top which are skipped.
2228
     * - encoding: unused
2229
     * - decoding: Set by user.
2230
     */
2231
     int skip_top;
2232

    
2233
    /**
2234
     * Number of macroblock rows at the bottom which are skipped.
2235
     * - encoding: unused
2236
     * - decoding: Set by user.
2237
     */
2238
     int skip_bottom;
2239

    
2240
    /**
2241
     * profile
2242
     * - encoding: Set by user.
2243
     * - decoding: Set by libavcodec.
2244
     */
2245
     int profile;
2246
#define FF_PROFILE_UNKNOWN -99
2247
#define FF_PROFILE_RESERVED -100
2248

    
2249
#define FF_PROFILE_AAC_MAIN 0
2250
#define FF_PROFILE_AAC_LOW  1
2251
#define FF_PROFILE_AAC_SSR  2
2252
#define FF_PROFILE_AAC_LTP  3
2253

    
2254
#define FF_PROFILE_DTS         20
2255
#define FF_PROFILE_DTS_ES      30
2256
#define FF_PROFILE_DTS_96_24   40
2257
#define FF_PROFILE_DTS_HD_HRA  50
2258
#define FF_PROFILE_DTS_HD_MA   60
2259

    
2260
#define FF_PROFILE_MPEG2_422    0
2261
#define FF_PROFILE_MPEG2_HIGH   1
2262
#define FF_PROFILE_MPEG2_SS     2
2263
#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
2264
#define FF_PROFILE_MPEG2_MAIN   4
2265
#define FF_PROFILE_MPEG2_SIMPLE 5
2266

    
2267
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2268
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2269

    
2270
#define FF_PROFILE_H264_BASELINE             66
2271
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2272
#define FF_PROFILE_H264_MAIN                 77
2273
#define FF_PROFILE_H264_EXTENDED             88
2274
#define FF_PROFILE_H264_HIGH                 100
2275
#define FF_PROFILE_H264_HIGH_10              110
2276
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2277
#define FF_PROFILE_H264_HIGH_422             122
2278
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2279
#define FF_PROFILE_H264_HIGH_444             144
2280
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2281
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2282
#define FF_PROFILE_H264_CAVLC_444            44
2283

    
2284
#define FF_PROFILE_VC1_SIMPLE   0
2285
#define FF_PROFILE_VC1_MAIN     1
2286
#define FF_PROFILE_VC1_COMPLEX  2
2287
#define FF_PROFILE_VC1_ADVANCED 3
2288

    
2289
    /**
2290
     * level
2291
     * - encoding: Set by user.
2292
     * - decoding: Set by libavcodec.
2293
     */
2294
     int level;
2295
#define FF_LEVEL_UNKNOWN -99
2296

    
2297
    /**
2298
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2299
     * - encoding: unused
2300
     * - decoding: Set by user.
2301
     */
2302
     int lowres;
2303

    
2304
    /**
2305
     * Bitstream width / height, may be different from width/height if lowres
2306
     * or other things are used.
2307
     * - encoding: unused
2308
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2309
     */
2310
    int coded_width, coded_height;
2311

    
2312
    /**
2313
     * frame skip threshold
2314
     * - encoding: Set by user.
2315
     * - decoding: unused
2316
     */
2317
    int frame_skip_threshold;
2318

    
2319
    /**
2320
     * frame skip factor
2321
     * - encoding: Set by user.
2322
     * - decoding: unused
2323
     */
2324
    int frame_skip_factor;
2325

    
2326
    /**
2327
     * frame skip exponent
2328
     * - encoding: Set by user.
2329
     * - decoding: unused
2330
     */
2331
    int frame_skip_exp;
2332

    
2333
    /**
2334
     * frame skip comparison function
2335
     * - encoding: Set by user.
2336
     * - decoding: unused
2337
     */
2338
    int frame_skip_cmp;
2339

    
2340
    /**
2341
     * Border processing masking, raises the quantizer for mbs on the borders
2342
     * of the picture.
2343
     * - encoding: Set by user.
2344
     * - decoding: unused
2345
     */
2346
    float border_masking;
2347

    
2348
    /**
2349
     * minimum MB lagrange multipler
2350
     * - encoding: Set by user.
2351
     * - decoding: unused
2352
     */
2353
    int mb_lmin;
2354

    
2355
    /**
2356
     * maximum MB lagrange multipler
2357
     * - encoding: Set by user.
2358
     * - decoding: unused
2359
     */
2360
    int mb_lmax;
2361

    
2362
    /**
2363
     *
2364
     * - encoding: Set by user.
2365
     * - decoding: unused
2366
     */
2367
    int me_penalty_compensation;
2368

    
2369
    /**
2370
     *
2371
     * - encoding: unused
2372
     * - decoding: Set by user.
2373
     */
2374
    enum AVDiscard skip_loop_filter;
2375

    
2376
    /**
2377
     *
2378
     * - encoding: unused
2379
     * - decoding: Set by user.
2380
     */
2381
    enum AVDiscard skip_idct;
2382

    
2383
    /**
2384
     *
2385
     * - encoding: unused
2386
     * - decoding: Set by user.
2387
     */
2388
    enum AVDiscard skip_frame;
2389

    
2390
    /**
2391
     *
2392
     * - encoding: Set by user.
2393
     * - decoding: unused
2394
     */
2395
    int bidir_refine;
2396

    
2397
    /**
2398
     *
2399
     * - encoding: Set by user.
2400
     * - decoding: unused
2401
     */
2402
    int brd_scale;
2403

    
2404
    /**
2405
     * constant rate factor - quality-based VBR - values ~correspond to qps
2406
     * - encoding: Set by user.
2407
     * - decoding: unused
2408
     */
2409
    float crf;
2410

    
2411
    /**
2412
     * constant quantization parameter rate control method
2413
     * - encoding: Set by user.
2414
     * - decoding: unused
2415
     */
2416
    int cqp;
2417

    
2418
    /**
2419
     * minimum GOP size
2420
     * - encoding: Set by user.
2421
     * - decoding: unused
2422
     */
2423
    int keyint_min;
2424

    
2425
    /**
2426
     * number of reference frames
2427
     * - encoding: Set by user.
2428
     * - decoding: Set by lavc.
2429
     */
2430
    int refs;
2431

    
2432
    /**
2433
     * chroma qp offset from luma
2434
     * - encoding: Set by user.
2435
     * - decoding: unused
2436
     */
2437
    int chromaoffset;
2438

    
2439
    /**
2440
     * Influences how often B-frames are used.
2441
     * - encoding: Set by user.
2442
     * - decoding: unused
2443
     */
2444
    int bframebias;
2445

    
2446
    /**
2447
     * trellis RD quantization
2448
     * - encoding: Set by user.
2449
     * - decoding: unused
2450
     */
2451
    int trellis;
2452

    
2453
    /**
2454
     * Reduce fluctuations in qp (before curve compression).
2455
     * - encoding: Set by user.
2456
     * - decoding: unused
2457
     */
2458
    float complexityblur;
2459

    
2460
    /**
2461
     * in-loop deblocking filter alphac0 parameter
2462
     * alpha is in the range -6...6
2463
     * - encoding: Set by user.
2464
     * - decoding: unused
2465
     */
2466
    int deblockalpha;
2467

    
2468
    /**
2469
     * in-loop deblocking filter beta parameter
2470
     * beta is in the range -6...6
2471
     * - encoding: Set by user.
2472
     * - decoding: unused
2473
     */
2474
    int deblockbeta;
2475

    
2476
    /**
2477
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2478
     * - encoding: Set by user.
2479
     * - decoding: unused
2480
     */
2481
    int partitions;
2482
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2483
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2484
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2485
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2486
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2487

    
2488
    /**
2489
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2490
     * - encoding: Set by user.
2491
     * - decoding: unused
2492
     */
2493
    int directpred;
2494

    
2495
    /**
2496
     * Audio cutoff bandwidth (0 means "automatic")
2497
     * - encoding: Set by user.
2498
     * - decoding: unused
2499
     */
2500
    int cutoff;
2501

    
2502
    /**
2503
     * Multiplied by qscale for each frame and added to scene_change_score.
2504
     * - encoding: Set by user.
2505
     * - decoding: unused
2506
     */
2507
    int scenechange_factor;
2508

    
2509
    /**
2510
     *
2511
     * Note: Value depends upon the compare function used for fullpel ME.
2512
     * - encoding: Set by user.
2513
     * - decoding: unused
2514
     */
2515
    int mv0_threshold;
2516

    
2517
    /**
2518
     * Adjusts sensitivity of b_frame_strategy 1.
2519
     * - encoding: Set by user.
2520
     * - decoding: unused
2521
     */
2522
    int b_sensitivity;
2523

    
2524
    /**
2525
     * - encoding: Set by user.
2526
     * - decoding: unused
2527
     */
2528
    int compression_level;
2529
#define FF_COMPRESSION_DEFAULT -1
2530

    
2531
#if FF_API_USE_LPC
2532
    /**
2533
     * Sets whether to use LPC mode - used by FLAC encoder.
2534
     * - encoding: Set by user.
2535
     * - decoding: unused
2536
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2537
     */
2538
    int use_lpc;
2539
#endif
2540

    
2541
    /**
2542
     * LPC coefficient precision - used by FLAC encoder
2543
     * - encoding: Set by user.
2544
     * - decoding: unused
2545
     */
2546
    int lpc_coeff_precision;
2547

    
2548
    /**
2549
     * - encoding: Set by user.
2550
     * - decoding: unused
2551
     */
2552
    int min_prediction_order;
2553

    
2554
    /**
2555
     * - encoding: Set by user.
2556
     * - decoding: unused
2557
     */
2558
    int max_prediction_order;
2559

    
2560
    /**
2561
     * search method for selecting prediction order
2562
     * - encoding: Set by user.
2563
     * - decoding: unused
2564
     */
2565
    int prediction_order_method;
2566

    
2567
    /**
2568
     * - encoding: Set by user.
2569
     * - decoding: unused
2570
     */
2571
    int min_partition_order;
2572

    
2573
    /**
2574
     * - encoding: Set by user.
2575
     * - decoding: unused
2576
     */
2577
    int max_partition_order;
2578

    
2579
    /**
2580
     * GOP timecode frame start number, in non drop frame format
2581
     * - encoding: Set by user.
2582
     * - decoding: unused
2583
     */
2584
    int64_t timecode_frame_start;
2585

    
2586
#if LIBAVCODEC_VERSION_MAJOR < 53
2587
    /**
2588
     * Decoder should decode to this many channels if it can (0 for default)
2589
     * - encoding: unused
2590
     * - decoding: Set by user.
2591
     * @deprecated Deprecated in favor of request_channel_layout.
2592
     */
2593
    int request_channels;
2594
#endif
2595

    
2596
    /**
2597
     * Percentage of dynamic range compression to be applied by the decoder.
2598
     * The default value is 1.0, corresponding to full compression.
2599
     * - encoding: unused
2600
     * - decoding: Set by user.
2601
     */
2602
    float drc_scale;
2603

    
2604
    /**
2605
     * opaque 64bit number (generally a PTS) that will be reordered and
2606
     * output in AVFrame.reordered_opaque
2607
     * @deprecated in favor of pkt_pts
2608
     * - encoding: unused
2609
     * - decoding: Set by user.
2610
     */
2611
    int64_t reordered_opaque;
2612

    
2613
    /**
2614
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2615
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2616
     * - encoding: set by user.
2617
     * - decoding: set by libavcodec.
2618
     */
2619
    int bits_per_raw_sample;
2620

    
2621
    /**
2622
     * Audio channel layout.
2623
     * - encoding: set by user.
2624
     * - decoding: set by libavcodec.
2625
     */
2626
    int64_t channel_layout;
2627

    
2628
    /**
2629
     * Request decoder to use this channel layout if it can (0 for default)
2630
     * - encoding: unused
2631
     * - decoding: Set by user.
2632
     */
2633
    int64_t request_channel_layout;
2634

    
2635
    /**
2636
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2637
     * - encoding: Set by user.
2638
     * - decoding: unused.
2639
     */
2640
    float rc_max_available_vbv_use;
2641

    
2642
    /**
2643
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2644
     * - encoding: Set by user.
2645
     * - decoding: unused.
2646
     */
2647
    float rc_min_vbv_overflow_use;
2648

    
2649
    /**
2650
     * Hardware accelerator in use
2651
     * - encoding: unused.
2652
     * - decoding: Set by libavcodec
2653
     */
2654
    struct AVHWAccel *hwaccel;
2655

    
2656
    /**
2657
     * For some codecs, the time base is closer to the field rate than the frame rate.
2658
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2659
     * if no telecine is used ...
2660
     *
2661
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2662
     */
2663
    int ticks_per_frame;
2664

    
2665
    /**
2666
     * Hardware accelerator context.
2667
     * For some hardware accelerators, a global context needs to be
2668
     * provided by the user. In that case, this holds display-dependent
2669
     * data FFmpeg cannot instantiate itself. Please refer to the
2670
     * FFmpeg HW accelerator documentation to know how to fill this
2671
     * is. e.g. for VA API, this is a struct vaapi_context.
2672
     * - encoding: unused
2673
     * - decoding: Set by user
2674
     */
2675
    void *hwaccel_context;
2676

    
2677
    /**
2678
     * Chromaticity coordinates of the source primaries.
2679
     * - encoding: Set by user
2680
     * - decoding: Set by libavcodec
2681
     */
2682
    enum AVColorPrimaries color_primaries;
2683

    
2684
    /**
2685
     * Color Transfer Characteristic.
2686
     * - encoding: Set by user
2687
     * - decoding: Set by libavcodec
2688
     */
2689
    enum AVColorTransferCharacteristic color_trc;
2690

    
2691
    /**
2692
     * YUV colorspace type.
2693
     * - encoding: Set by user
2694
     * - decoding: Set by libavcodec
2695
     */
2696
    enum AVColorSpace colorspace;
2697

    
2698
    /**
2699
     * MPEG vs JPEG YUV range.
2700
     * - encoding: Set by user
2701
     * - decoding: Set by libavcodec
2702
     */
2703
    enum AVColorRange color_range;
2704

    
2705
    /**
2706
     * This defines the location of chroma samples.
2707
     * - encoding: Set by user
2708
     * - decoding: Set by libavcodec
2709
     */
2710
    enum AVChromaLocation chroma_sample_location;
2711

    
2712
    /**
2713
     * The codec may call this to execute several independent things.
2714
     * It will return only after finishing all tasks.
2715
     * The user may replace this with some multithreaded implementation,
2716
     * the default implementation will execute the parts serially.
2717
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2718
     * @param c context passed also to func
2719
     * @param count the number of things to execute
2720
     * @param arg2 argument passed unchanged to func
2721
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2722
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2723
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2724
     *             two instances of func executing at the same time will have the same threadnr.
2725
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2726
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2727
     * - encoding: Set by libavcodec, user can override.
2728
     * - decoding: Set by libavcodec, user can override.
2729
     */
2730
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2731

    
2732
    /**
2733
     * explicit P-frame weighted prediction analysis method
2734
     * 0: off
2735
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2736
     * 2: smart weighting (full fade detection analysis)
2737
     * - encoding: Set by user.
2738
     * - decoding: unused
2739
     */
2740
    int weighted_p_pred;
2741

    
2742
    /**
2743
     * AQ mode
2744
     * 0: Disabled
2745
     * 1: Variance AQ (complexity mask)
2746
     * 2: Auto-variance AQ (experimental)
2747
     * - encoding: Set by user
2748
     * - decoding: unused
2749
     */
2750
    int aq_mode;
2751

    
2752
    /**
2753
     * AQ strength
2754
     * Reduces blocking and blurring in flat and textured areas.
2755
     * - encoding: Set by user
2756
     * - decoding: unused
2757
     */
2758
    float aq_strength;
2759

    
2760
    /**
2761
     * PSY RD
2762
     * Strength of psychovisual optimization
2763
     * - encoding: Set by user
2764
     * - decoding: unused
2765
     */
2766
    float psy_rd;
2767

    
2768
    /**
2769
     * PSY trellis
2770
     * Strength of psychovisual optimization
2771
     * - encoding: Set by user
2772
     * - decoding: unused
2773
     */
2774
    float psy_trellis;
2775

    
2776
    /**
2777
     * RC lookahead
2778
     * Number of frames for frametype and ratecontrol lookahead
2779
     * - encoding: Set by user
2780
     * - decoding: unused
2781
     */
2782
    int rc_lookahead;
2783

    
2784
    /**
2785
     * Constant rate factor maximum
2786
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2787
     * than crf_max, even if doing so would violate VBV restrictions.
2788
     * - encoding: Set by user.
2789
     * - decoding: unused
2790
     */
2791
    float crf_max;
2792

    
2793
    int log_level_offset;
2794

    
2795
    /**
2796
     * Determines which LPC analysis algorithm to use.
2797
     * - encoding: Set by user
2798
     * - decoding: unused
2799
     */
2800
    enum AVLPCType lpc_type;
2801

    
2802
    /**
2803
     * Number of passes to use for Cholesky factorization during LPC analysis
2804
     * - encoding: Set by user
2805
     * - decoding: unused
2806
     */
2807
    int lpc_passes;
2808

    
2809
    /**
2810
     * Number of slices.
2811
     * Indicates number of picture subdivisions. Used for parallelized
2812
     * decoding.
2813
     * - encoding: Set by user
2814
     * - decoding: unused
2815
     */
2816
    int slices;
2817

    
2818
    /**
2819
     * Header containing style information for text subtitles.
2820
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2821
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2822
     * the Format line following. It shouldn't include any Dialogue line.
2823
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2824
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2825
     */
2826
    uint8_t *subtitle_header;
2827
    int subtitle_header_size;
2828

    
2829
    /**
2830
     * Current packet as passed into the decoder, to avoid having
2831
     * to pass the packet into every function. Currently only valid
2832
     * inside lavc and get/release_buffer callbacks.
2833
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2834
     * - encoding: unused
2835
     */
2836
    AVPacket *pkt;
2837

    
2838
    /**
2839
     * Whether this is a copy of the context which had init() called on it.
2840
     * This is used by multithreading - shared tables and picture pointers
2841
     * should be freed from the original context only.
2842
     * - encoding: Set by libavcodec.
2843
     * - decoding: Set by libavcodec.
2844
     */
2845
    int is_copy;
2846

    
2847
    /**
2848
     * Which multithreading methods to use.
2849
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2850
     * so clients which cannot provide future frames should not use it.
2851
     *
2852
     * - encoding: Set by user, otherwise the default is used.
2853
     * - decoding: Set by user, otherwise the default is used.
2854
     */
2855
    int thread_type;
2856
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2857
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2858

    
2859
    /**
2860
     * Which multithreading methods are in use by the codec.
2861
     * - encoding: Set by libavcodec.
2862
     * - decoding: Set by libavcodec.
2863
     */
2864
    int active_thread_type;
2865

    
2866
    /**
2867
     * Set by the client if its custom get_buffer() callback can be called
2868
     * from another thread, which allows faster multithreaded decoding.
2869
     * draw_horiz_band() will be called from other threads regardless of this setting.
2870
     * Ignored if the default get_buffer() is used.
2871
     * - encoding: Set by user.
2872
     * - decoding: Set by user.
2873
     */
2874
    int thread_safe_callbacks;
2875

    
2876
    /**
2877
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2878
     * Used for compliant TS muxing.
2879
     * - encoding: Set by libavcodec.
2880
     * - decoding: unused.
2881
     */
2882
    uint64_t vbv_delay;
2883

    
2884
    /**
2885
     * Type of service that the audio stream conveys.
2886
     * - encoding: Set by user.
2887
     * - decoding: Set by libavcodec.
2888
     */
2889
    enum AVAudioServiceType audio_service_type;
2890
} AVCodecContext;
2891

    
2892
/**
2893
 * AVProfile.
2894
 */
2895
typedef struct AVProfile {
2896
    int profile;
2897
    const char *name; ///< short name for the profile
2898
} AVProfile;
2899

    
2900
/**
2901
 * AVCodec.
2902
 */
2903
typedef struct AVCodec {
2904
    /**
2905
     * Name of the codec implementation.
2906
     * The name is globally unique among encoders and among decoders (but an
2907
     * encoder and a decoder can share the same name).
2908
     * This is the primary way to find a codec from the user perspective.
2909
     */
2910
    const char *name;
2911
    enum AVMediaType type;
2912
    enum CodecID id;
2913
    int priv_data_size;
2914
    int (*init)(AVCodecContext *);
2915
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2916
    int (*close)(AVCodecContext *);
2917
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2918
    /**
2919
     * Codec capabilities.
2920
     * see CODEC_CAP_*
2921
     */
2922
    int capabilities;
2923
    struct AVCodec *next;
2924
    /**
2925
     * Flush buffers.
2926
     * Will be called when seeking
2927
     */
2928
    void (*flush)(AVCodecContext *);
2929
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2930
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2931
    /**
2932
     * Descriptive name for the codec, meant to be more human readable than name.
2933
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2934
     */
2935
    const char *long_name;
2936
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2937
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2938
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2939
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2940
    AVClass *priv_class;                    ///< AVClass for the private context
2941
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2942

    
2943
    /**
2944
     * @defgroup framethreading Frame-level threading support functions.
2945
     * @{
2946
     */
2947
    /**
2948
     * If defined, called on thread contexts when they are created.
2949
     * If the codec allocates writable tables in init(), re-allocate them here.
2950
     * priv_data will be set to a copy of the original.
2951
     */
2952
    int (*init_thread_copy)(AVCodecContext *);
2953
    /**
2954
     * Copy necessary context variables from a previous thread context to the current one.
2955
     * If not defined, the next thread will start automatically; otherwise, the codec
2956
     * must call ff_thread_finish_setup().
2957
     *
2958
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2959
     */
2960
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2961
    /** @} */
2962
} AVCodec;
2963

    
2964
/**
2965
 * AVHWAccel.
2966
 */
2967
typedef struct AVHWAccel {
2968
    /**
2969
     * Name of the hardware accelerated codec.
2970
     * The name is globally unique among encoders and among decoders (but an
2971
     * encoder and a decoder can share the same name).
2972
     */
2973
    const char *name;
2974

    
2975
    /**
2976
     * Type of codec implemented by the hardware accelerator.
2977
     *
2978
     * See AVMEDIA_TYPE_xxx
2979
     */
2980
    enum AVMediaType type;
2981

    
2982
    /**
2983
     * Codec implemented by the hardware accelerator.
2984
     *
2985
     * See CODEC_ID_xxx
2986
     */
2987
    enum CodecID id;
2988

    
2989
    /**
2990
     * Supported pixel format.
2991
     *
2992
     * Only hardware accelerated formats are supported here.
2993
     */
2994
    enum PixelFormat pix_fmt;
2995

    
2996
    /**
2997
     * Hardware accelerated codec capabilities.
2998
     * see FF_HWACCEL_CODEC_CAP_*
2999
     */
3000
    int capabilities;
3001

    
3002
    struct AVHWAccel *next;
3003

    
3004
    /**
3005
     * Called at the beginning of each frame or field picture.
3006
     *
3007
     * Meaningful frame information (codec specific) is guaranteed to
3008
     * be parsed at this point. This function is mandatory.
3009
     *
3010
     * Note that buf can be NULL along with buf_size set to 0.
3011
     * Otherwise, this means the whole frame is available at this point.
3012
     *
3013
     * @param avctx the codec context
3014
     * @param buf the frame data buffer base
3015
     * @param buf_size the size of the frame in bytes
3016
     * @return zero if successful, a negative value otherwise
3017
     */
3018
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3019

    
3020
    /**
3021
     * Callback for each slice.
3022
     *
3023
     * Meaningful slice information (codec specific) is guaranteed to
3024
     * be parsed at this point. This function is mandatory.
3025
     *
3026
     * @param avctx the codec context
3027
     * @param buf the slice data buffer base
3028
     * @param buf_size the size of the slice in bytes
3029
     * @return zero if successful, a negative value otherwise
3030
     */
3031
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3032

    
3033
    /**
3034
     * Called at the end of each frame or field picture.
3035
     *
3036
     * The whole picture is parsed at this point and can now be sent
3037
     * to the hardware accelerator. This function is mandatory.
3038
     *
3039
     * @param avctx the codec context
3040
     * @return zero if successful, a negative value otherwise
3041
     */
3042
    int (*end_frame)(AVCodecContext *avctx);
3043

    
3044
    /**
3045
     * Size of HW accelerator private data.
3046
     *
3047
     * Private data is allocated with av_mallocz() before
3048
     * AVCodecContext.get_buffer() and deallocated after
3049
     * AVCodecContext.release_buffer().
3050
     */
3051
    int priv_data_size;
3052
} AVHWAccel;
3053

    
3054
/**
3055
 * four components are given, that's all.
3056
 * the last component is alpha
3057
 */
3058
typedef struct AVPicture {
3059
    uint8_t *data[4];
3060
    int linesize[4];       ///< number of bytes per line
3061
} AVPicture;
3062

    
3063
#if FF_API_PALETTE_CONTROL
3064
/**
3065
 * AVPaletteControl
3066
 * This structure defines a method for communicating palette changes
3067
 * between and demuxer and a decoder.
3068
 *
3069
 * @deprecated Use AVPacket to send palette changes instead.
3070
 * This is totally broken.
3071
 */
3072
#define AVPALETTE_SIZE 1024
3073
#define AVPALETTE_COUNT 256
3074
typedef struct AVPaletteControl {
3075

    
3076
    /* Demuxer sets this to 1 to indicate the palette has changed;
3077
     * decoder resets to 0. */
3078
    int palette_changed;
3079

    
3080
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3081
     * the individual palette components should be on a 8-bit scale; if
3082
     * the palette data comes from an IBM VGA native format, the component
3083
     * data is probably 6 bits in size and needs to be scaled. */
3084
    unsigned int palette[AVPALETTE_COUNT];
3085

    
3086
} AVPaletteControl attribute_deprecated;
3087
#endif
3088

    
3089
enum AVSubtitleType {
3090
    SUBTITLE_NONE,
3091

    
3092
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3093

    
3094
    /**
3095
     * Plain text, the text field must be set by the decoder and is
3096
     * authoritative. ass and pict fields may contain approximations.
3097
     */
3098
    SUBTITLE_TEXT,
3099

    
3100
    /**
3101
     * Formatted text, the ass field must be set by the decoder and is
3102
     * authoritative. pict and text fields may contain approximations.
3103
     */
3104
    SUBTITLE_ASS,
3105
};
3106

    
3107
typedef struct AVSubtitleRect {
3108
    int x;         ///< top left corner  of pict, undefined when pict is not set
3109
    int y;         ///< top left corner  of pict, undefined when pict is not set
3110
    int w;         ///< width            of pict, undefined when pict is not set
3111
    int h;         ///< height           of pict, undefined when pict is not set
3112
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3113

    
3114
    /**
3115
     * data+linesize for the bitmap of this subtitle.
3116
     * can be set for text/ass as well once they where rendered
3117
     */
3118
    AVPicture pict;
3119
    enum AVSubtitleType type;
3120

    
3121
    char *text;                     ///< 0 terminated plain UTF-8 text
3122

    
3123
    /**
3124
     * 0 terminated ASS/SSA compatible event line.
3125
     * The pressentation of this is unaffected by the other values in this
3126
     * struct.
3127
     */
3128
    char *ass;
3129
} AVSubtitleRect;
3130

    
3131
typedef struct AVSubtitle {
3132
    uint16_t format; /* 0 = graphics */
3133
    uint32_t start_display_time; /* relative to packet pts, in ms */
3134
    uint32_t end_display_time; /* relative to packet pts, in ms */
3135
    unsigned num_rects;
3136
    AVSubtitleRect **rects;
3137
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3138
} AVSubtitle;
3139

    
3140
/* packet functions */
3141

    
3142
/**
3143
 * @deprecated use NULL instead
3144
 */
3145
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3146

    
3147
/**
3148
 * Default packet destructor.
3149
 */
3150
void av_destruct_packet(AVPacket *pkt);
3151

    
3152
/**
3153
 * Initialize optional fields of a packet with default values.
3154
 *
3155
 * @param pkt packet
3156
 */
3157
void av_init_packet(AVPacket *pkt);
3158

    
3159
/**
3160
 * Allocate the payload of a packet and initialize its fields with
3161
 * default values.
3162
 *
3163
 * @param pkt packet
3164
 * @param size wanted payload size
3165
 * @return 0 if OK, AVERROR_xxx otherwise
3166
 */
3167
int av_new_packet(AVPacket *pkt, int size);
3168

    
3169
/**
3170
 * Reduce packet size, correctly zeroing padding
3171
 *
3172
 * @param pkt packet
3173
 * @param size new size
3174
 */
3175
void av_shrink_packet(AVPacket *pkt, int size);
3176

    
3177
/**
3178
 * Increase packet size, correctly zeroing padding
3179
 *
3180
 * @param pkt packet
3181
 * @param grow_by number of bytes by which to increase the size of the packet
3182
 */
3183
int av_grow_packet(AVPacket *pkt, int grow_by);
3184

    
3185
/**
3186
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3187
 * packet is allocated if it was not really allocated.
3188
 */
3189
int av_dup_packet(AVPacket *pkt);
3190

    
3191
/**
3192
 * Free a packet.
3193
 *
3194
 * @param pkt packet to free
3195
 */
3196
void av_free_packet(AVPacket *pkt);
3197

    
3198
/* resample.c */
3199

    
3200
struct ReSampleContext;
3201
struct AVResampleContext;
3202

    
3203
typedef struct ReSampleContext ReSampleContext;
3204

    
3205
#if FF_API_AUDIO_OLD
3206
/**
3207
 * @deprecated Use av_audio_resample_init() instead.
3208
 */
3209
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3210
                                                          int output_rate, int input_rate);
3211
#endif
3212

    
3213
/**
3214
 *  Initialize audio resampling context.
3215
 *
3216
 * @param output_channels  number of output channels
3217
 * @param input_channels   number of input channels
3218
 * @param output_rate      output sample rate
3219
 * @param input_rate       input sample rate
3220
 * @param sample_fmt_out   requested output sample format
3221
 * @param sample_fmt_in    input sample format
3222
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3223
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3224
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3225
                           between the 2 closest, if 0 the closest will be used
3226
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3227
 * @return allocated ReSampleContext, NULL if error occured
3228
 */
3229
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3230
                                        int output_rate, int input_rate,
3231
                                        enum AVSampleFormat sample_fmt_out,
3232
                                        enum AVSampleFormat sample_fmt_in,
3233
                                        int filter_length, int log2_phase_count,
3234
                                        int linear, double cutoff);
3235

    
3236
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3237

    
3238
/**
3239
 * Free resample context.
3240
 *
3241
 * @param s a non-NULL pointer to a resample context previously
3242
 *          created with av_audio_resample_init()
3243
 */
3244
void audio_resample_close(ReSampleContext *s);
3245

    
3246

    
3247
/**
3248
 * Initialize an audio resampler.
3249
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3250
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3251
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3252
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3253
                 between the 2 closest, if 0 the closest will be used
3254
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3255
 */
3256
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3257

    
3258
/**
3259
 * Resample an array of samples using a previously configured context.
3260
 * @param src an array of unconsumed samples
3261
 * @param consumed the number of samples of src which have been consumed are returned here
3262
 * @param src_size the number of unconsumed samples available
3263
 * @param dst_size the amount of space in samples available in dst
3264
 * @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.
3265
 * @return the number of samples written in dst or -1 if an error occurred
3266
 */
3267
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3268

    
3269

    
3270
/**
3271
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3272
 * the resampler parameters, so no audible clicks or similar distortions occur
3273
 * @param compensation_distance distance in output samples over which the compensation should be performed
3274
 * @param sample_delta number of output samples which should be output less
3275
 *
3276
 * example: av_resample_compensate(c, 10, 500)
3277
 * here instead of 510 samples only 500 samples would be output
3278
 *
3279
 * note, due to rounding the actual compensation might be slightly different,
3280
 * especially if the compensation_distance is large and the in_rate used during init is small
3281
 */
3282
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3283
void av_resample_close(struct AVResampleContext *c);
3284

    
3285
/**
3286
 * Allocate memory for a picture.  Call avpicture_free to free it.
3287
 *
3288
 * @param picture the picture to be filled in
3289
 * @param pix_fmt the format of the picture
3290
 * @param width the width of the picture
3291
 * @param height the height of the picture
3292
 * @return zero if successful, a negative value if not
3293
 */
3294
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3295

    
3296
/**
3297
 * Free a picture previously allocated by avpicture_alloc().
3298
 *
3299
 * @param picture the AVPicture to be freed
3300
 */
3301
void avpicture_free(AVPicture *picture);
3302

    
3303
/**
3304
 * Fill in the AVPicture fields.
3305
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3306
 * which points to the image data buffer. Depending on the specified picture
3307
 * format, one or multiple image data pointers and line sizes will be set.
3308
 * If a planar format is specified, several pointers will be set pointing to
3309
 * the different picture planes and the line sizes of the different planes
3310
 * will be stored in the lines_sizes array.
3311
 * Call with ptr == NULL to get the required size for the ptr buffer.
3312
 *
3313
 * @param picture AVPicture whose fields are to be filled in
3314
 * @param ptr Buffer which will contain or contains the actual image data
3315
 * @param pix_fmt The format in which the picture data is stored.
3316
 * @param width the width of the image in pixels
3317
 * @param height the height of the image in pixels
3318
 * @return size of the image data in bytes
3319
 */
3320
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3321
                   enum PixelFormat pix_fmt, int width, int height);
3322
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3323
                     unsigned char *dest, int dest_size);
3324

    
3325
/**
3326
 * Calculate the size in bytes that a picture of the given width and height
3327
 * would occupy if stored in the given picture format.
3328
 * Note that this returns the size of a compact representation as generated
3329
 * by avpicture_layout, which can be smaller than the size required for e.g.
3330
 * avpicture_fill.
3331
 *
3332
 * @param pix_fmt the given picture format
3333
 * @param width the width of the image
3334
 * @param height the height of the image
3335
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3336
 */
3337
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3338
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3339
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3340
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3341

    
3342
#if LIBAVCODEC_VERSION_MAJOR < 53
3343
/**
3344
 * Return the pixel format corresponding to the name name.
3345
 *
3346
 * If there is no pixel format with name name, then look for a
3347
 * pixel format with the name corresponding to the native endian
3348
 * format of name.
3349
 * For example in a little-endian system, first look for "gray16",
3350
 * then for "gray16le".
3351
 *
3352
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3353
 *
3354
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3355
 */
3356
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3357
#endif
3358

    
3359
/**
3360
 * Return a value representing the fourCC code associated to the
3361
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3362
 * found.
3363
 */
3364
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3365

    
3366
/**
3367
 * Put a string representing the codec tag codec_tag in buf.
3368
 *
3369
 * @param buf_size size in bytes of buf
3370
 * @return the length of the string that would have been generated if
3371
 * enough space had been available, excluding the trailing null
3372
 */
3373
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3374

    
3375
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3376
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3377
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3378
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3379
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3380
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3381

    
3382
/**
3383
 * Compute what kind of losses will occur when converting from one specific
3384
 * pixel format to another.
3385
 * When converting from one pixel format to another, information loss may occur.
3386
 * For example, when converting from RGB24 to GRAY, the color information will
3387
 * be lost. Similarly, other losses occur when converting from some formats to
3388
 * other formats. These losses can involve loss of chroma, but also loss of
3389
 * resolution, loss of color depth, loss due to the color space conversion, loss
3390
 * of the alpha bits or loss due to color quantization.
3391
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3392
 * which will occur when converting from one pixel format to another.
3393
 *
3394
 * @param[in] dst_pix_fmt destination pixel format
3395
 * @param[in] src_pix_fmt source pixel format
3396
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3397
 * @return Combination of flags informing you what kind of losses will occur.
3398
 */
3399
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3400
                             int has_alpha);
3401

    
3402
/**
3403
 * Find the best pixel format to convert to given a certain source pixel
3404
 * format.  When converting from one pixel format to another, information loss
3405
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3406
 * information will be lost. Similarly, other losses occur when converting from
3407
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3408
 * the given pixel formats should be used to suffer the least amount of loss.
3409
 * The pixel formats from which it chooses one, are determined by the
3410
 * pix_fmt_mask parameter.
3411
 *
3412
 * @code
3413
 * src_pix_fmt = PIX_FMT_YUV420P;
3414
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3415
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3416
 * @endcode
3417
 *
3418
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3419
 * @param[in] src_pix_fmt source pixel format
3420
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3421
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3422
 * @return The best pixel format to convert to or -1 if none was found.
3423
 */
3424
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3425
                              int has_alpha, int *loss_ptr);
3426

    
3427
#if LIBAVCODEC_VERSION_MAJOR < 53
3428
/**
3429
 * @deprecated Use av_get_pix_fmt_string() instead.
3430
 */
3431
attribute_deprecated
3432
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3433
#endif
3434

    
3435
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3436
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3437

    
3438
/**
3439
 * Tell if an image really has transparent alpha values.
3440
 * @return ored mask of FF_ALPHA_xxx constants
3441
 */
3442
int img_get_alpha_info(const AVPicture *src,
3443
                       enum PixelFormat pix_fmt, int width, int height);
3444

    
3445
/* deinterlace a picture */
3446
/* deinterlace - if not supported return -1 */
3447
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3448
                          enum PixelFormat pix_fmt, int width, int height);
3449

    
3450
/* external high level API */
3451

    
3452
/**
3453
 * If c is NULL, returns the first registered codec,
3454
 * if c is non-NULL, returns the next registered codec after c,
3455
 * or NULL if c is the last one.
3456
 */
3457
AVCodec *av_codec_next(AVCodec *c);
3458

    
3459
/**
3460
 * Return the LIBAVCODEC_VERSION_INT constant.
3461
 */
3462
unsigned avcodec_version(void);
3463

    
3464
/**
3465
 * Return the libavcodec build-time configuration.
3466
 */
3467
const char *avcodec_configuration(void);
3468

    
3469
/**
3470
 * Return the libavcodec license.
3471
 */
3472
const char *avcodec_license(void);
3473

    
3474
/**
3475
 * Initialize libavcodec.
3476
 *
3477
 * @warning This function must be called before any other libavcodec
3478
 * function.
3479
 */
3480
void avcodec_init(void);
3481

    
3482
#if LIBAVCODEC_VERSION_MAJOR < 53
3483
/**
3484
 * @deprecated Deprecated in favor of avcodec_register().
3485
 */
3486
attribute_deprecated void register_avcodec(AVCodec *codec);
3487
#endif
3488

    
3489
/**
3490
 * Register the codec codec and initialize libavcodec.
3491
 *
3492
 * @see avcodec_init()
3493
 */
3494
void avcodec_register(AVCodec *codec);
3495

    
3496
/**
3497
 * Find a registered encoder with a matching codec ID.
3498
 *
3499
 * @param id CodecID of the requested encoder
3500
 * @return An encoder if one was found, NULL otherwise.
3501
 */
3502
AVCodec *avcodec_find_encoder(enum CodecID id);
3503

    
3504
/**
3505
 * Find a registered encoder with the specified name.
3506
 *
3507
 * @param name name of the requested encoder
3508
 * @return An encoder if one was found, NULL otherwise.
3509
 */
3510
AVCodec *avcodec_find_encoder_by_name(const char *name);
3511

    
3512
/**
3513
 * Find a registered decoder with a matching codec ID.
3514
 *
3515
 * @param id CodecID of the requested decoder
3516
 * @return A decoder if one was found, NULL otherwise.
3517
 */
3518
AVCodec *avcodec_find_decoder(enum CodecID id);
3519

    
3520
/**
3521
 * Find a registered decoder with the specified name.
3522
 *
3523
 * @param name name of the requested decoder
3524
 * @return A decoder if one was found, NULL otherwise.
3525
 */
3526
AVCodec *avcodec_find_decoder_by_name(const char *name);
3527
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3528

    
3529
/**
3530
 * Return a name for the specified profile, if available.
3531
 *
3532
 * @param codec the codec that is searched for the given profile
3533
 * @param profile the profile value for which a name is requested
3534
 * @return A name for the profile if found, NULL otherwise.
3535
 */
3536
const char *av_get_profile_name(const AVCodec *codec, int profile);
3537

    
3538
/**
3539
 * Set the fields of the given AVCodecContext to default values.
3540
 *
3541
 * @param s The AVCodecContext of which the fields should be set to default values.
3542
 */
3543
void avcodec_get_context_defaults(AVCodecContext *s);
3544

    
3545
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3546
 *  we WILL change its arguments and name a few times! */
3547
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3548

    
3549
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3550
 *  we WILL change its arguments and name a few times! */
3551
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3552

    
3553
/**
3554
 * Allocate an AVCodecContext and set its fields to default values.  The
3555
 * resulting struct can be deallocated by simply calling av_free().
3556
 *
3557
 * @return An AVCodecContext filled with default values or NULL on failure.
3558
 * @see avcodec_get_context_defaults
3559
 */
3560
AVCodecContext *avcodec_alloc_context(void);
3561

    
3562
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3563
 *  we WILL change its arguments and name a few times! */
3564
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3565

    
3566
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3567
 *  we WILL change its arguments and name a few times! */
3568
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3569

    
3570
/**
3571
 * Copy the settings of the source AVCodecContext into the destination
3572
 * AVCodecContext. The resulting destination codec context will be
3573
 * unopened, i.e. you are required to call avcodec_open() before you
3574
 * can use this AVCodecContext to decode/encode video/audio data.
3575
 *
3576
 * @param dest target codec context, should be initialized with
3577
 *             avcodec_alloc_context(), but otherwise uninitialized
3578
 * @param src source codec context
3579
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3580
 */
3581
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3582

    
3583
/**
3584
 * Set the fields of the given AVFrame to default values.
3585
 *
3586
 * @param pic The AVFrame of which the fields should be set to default values.
3587
 */
3588
void avcodec_get_frame_defaults(AVFrame *pic);
3589

    
3590
/**
3591
 * Allocate an AVFrame and set its fields to default values.  The resulting
3592
 * struct can be deallocated by simply calling av_free().
3593
 *
3594
 * @return An AVFrame filled with default values or NULL on failure.
3595
 * @see avcodec_get_frame_defaults
3596
 */
3597
AVFrame *avcodec_alloc_frame(void);
3598

    
3599
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3600
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3601
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3602

    
3603
/**
3604
 * Return the amount of padding in pixels which the get_buffer callback must
3605
 * provide around the edge of the image for codecs which do not have the
3606
 * CODEC_FLAG_EMU_EDGE flag.
3607
 *
3608
 * @return Required padding in pixels.
3609
 */
3610
unsigned avcodec_get_edge_width(void);
3611
/**
3612
 * Modify width and height values so that they will result in a memory
3613
 * buffer that is acceptable for the codec if you do not use any horizontal
3614
 * padding.
3615
 *
3616
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3617
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3618
 * according to avcodec_get_edge_width() before.
3619
 */
3620
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3621
/**
3622
 * Modify width and height values so that they will result in a memory
3623
 * buffer that is acceptable for the codec if you also ensure that all
3624
 * line sizes are a multiple of the respective linesize_align[i].
3625
 *
3626
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3627
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3628
 * according to avcodec_get_edge_width() before.
3629
 */
3630
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3631
                               int linesize_align[4]);
3632

    
3633
#if LIBAVCODEC_VERSION_MAJOR < 53
3634
/**
3635
 * @deprecated Deprecated in favor of av_check_image_size().
3636
 */
3637
attribute_deprecated
3638
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3639
#endif
3640

    
3641
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3642

    
3643
#if LIBAVCODEC_VERSION_MAJOR < 53
3644
/**
3645
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3646
 */
3647
attribute_deprecated
3648
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3649
void avcodec_thread_free(AVCodecContext *s);
3650
#endif
3651
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3652
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3653
//FIXME func typedef
3654

    
3655
/**
3656
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3657
 * function the context has to be allocated.
3658
 *
3659
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3660
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3661
 * retrieving a codec.
3662
 *
3663
 * @warning This function is not thread safe!
3664
 *
3665
 * @code
3666
 * avcodec_register_all();
3667
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3668
 * if (!codec)
3669
 *     exit(1);
3670
 *
3671
 * context = avcodec_alloc_context();
3672
 *
3673
 * if (avcodec_open(context, codec) < 0)
3674
 *     exit(1);
3675
 * @endcode
3676
 *
3677
 * @param avctx The context which will be set up to use the given codec.
3678
 * @param codec The codec to use within the context.
3679
 * @return zero on success, a negative value on error
3680
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3681
 */
3682
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3683

    
3684
#if FF_API_AUDIO_OLD
3685
/**
3686
 * Decode an audio frame from buf into samples.
3687
 * Wrapper function which calls avcodec_decode_audio3.
3688
 *
3689
 * @deprecated Use avcodec_decode_audio3 instead.
3690
 * @param avctx the codec context
3691
 * @param[out] samples the output buffer
3692
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3693
 * @param[in] buf the input buffer
3694
 * @param[in] buf_size the input buffer size in bytes
3695
 * @return On error a negative value is returned, otherwise the number of bytes
3696
 * used or zero if no frame could be decompressed.
3697
 */
3698
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3699
                         int *frame_size_ptr,
3700
                         const uint8_t *buf, int buf_size);
3701
#endif
3702

    
3703
/**
3704
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3705
 * Some decoders may support multiple frames in a single AVPacket, such
3706
 * decoders would then just decode the first frame. In this case,
3707
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3708
 * the remaining data in order to decode the second frame etc.
3709
 * If no frame
3710
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3711
 * decompressed frame size in bytes.
3712
 *
3713
 * @warning You must set frame_size_ptr to the allocated size of the
3714
 * output buffer before calling avcodec_decode_audio3().
3715
 *
3716
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3717
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3718
 * bits at once and could read over the end.
3719
 *
3720
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3721
 * no overreading happens for damaged MPEG streams.
3722
 *
3723
 * @note You might have to align the input buffer avpkt->data and output buffer
3724
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3725
 * necessary at all, on others it won't work at all if not aligned and on others
3726
 * it will work but it will have an impact on performance.
3727
 *
3728
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3729
 * samples should be 16 byte aligned unless the CPU doesn't need it
3730
 * (AltiVec and SSE do).
3731
 *
3732
 * @param avctx the codec context
3733
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3734
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3735
 * @param[in] avpkt The input AVPacket containing the input buffer.
3736
 *            You can create such packet with av_init_packet() and by then setting
3737
 *            data and size, some decoders might in addition need other fields.
3738
 *            All decoders are designed to use the least fields possible though.
3739
 * @return On error a negative value is returned, otherwise the number of bytes
3740
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3741
 */
3742
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3743
                         int *frame_size_ptr,
3744
                         AVPacket *avpkt);
3745

    
3746
#if FF_API_VIDEO_OLD
3747
/**
3748
 * Decode a video frame from buf into picture.
3749
 * Wrapper function which calls avcodec_decode_video2.
3750
 *
3751
 * @deprecated Use avcodec_decode_video2 instead.
3752
 * @param avctx the codec context
3753
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3754
 * @param[in] buf the input buffer
3755
 * @param[in] buf_size the size of the input buffer in bytes
3756
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3757
 * @return On error a negative value is returned, otherwise the number of bytes
3758
 * used or zero if no frame could be decompressed.
3759
 */
3760
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3761
                         int *got_picture_ptr,
3762
                         const uint8_t *buf, int buf_size);
3763
#endif
3764

    
3765
/**
3766
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3767
 * Some decoders may support multiple frames in a single AVPacket, such
3768
 * decoders would then just decode the first frame.
3769
 *
3770
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3771
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3772
 * bits at once and could read over the end.
3773
 *
3774
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3775
 * no overreading happens for damaged MPEG streams.
3776
 *
3777
 * @note You might have to align the input buffer avpkt->data.
3778
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3779
 * necessary at all, on others it won't work at all if not aligned and on others
3780
 * it will work but it will have an impact on performance.
3781
 *
3782
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3783
 *
3784
 * @note Some codecs have a delay between input and output, these need to be
3785
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3786
 *
3787
 * @param avctx the codec context
3788
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3789
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3790
 *             allocate memory for the actual bitmap.
3791
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3792
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3793
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3794
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3795
 *
3796
 * @param[in] avpkt The input AVpacket containing the input buffer.
3797
 *            You can create such packet with av_init_packet() and by then setting
3798
 *            data and size, some decoders might in addition need other fields like
3799
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3800
 *            fields possible.
3801
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3802
 * @return On error a negative value is returned, otherwise the number of bytes
3803
 * used or zero if no frame could be decompressed.
3804
 */
3805
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3806
                         int *got_picture_ptr,
3807
                         AVPacket *avpkt);
3808

    
3809
#if FF_API_SUBTITLE_OLD
3810
/* Decode a subtitle message. Return -1 if error, otherwise return the
3811
 * number of bytes used. If no subtitle could be decompressed,
3812
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3813
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3814
                            int *got_sub_ptr,
3815
                            const uint8_t *buf, int buf_size);
3816
#endif
3817

    
3818
/**
3819
 * Decode a subtitle message.
3820
 * Return a negative value on error, otherwise return the number of bytes used.
3821
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3822
 * Otherwise, the subtitle is stored in *sub.
3823
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3824
 * simplicity, because the performance difference is expect to be negligible
3825
 * and reusing a get_buffer written for video codecs would probably perform badly
3826
 * due to a potentially very different allocation pattern.
3827
 *
3828
 * @param avctx the codec context
3829
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3830
                   freed with avsubtitle_free if *got_sub_ptr is set.
3831
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3832
 * @param[in] avpkt The input AVPacket containing the input buffer.
3833
 */
3834
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3835
                            int *got_sub_ptr,
3836
                            AVPacket *avpkt);
3837

    
3838
/**
3839
 * Frees all allocated data in the given subtitle struct.
3840
 *
3841
 * @param sub AVSubtitle to free.
3842
 */
3843
void avsubtitle_free(AVSubtitle *sub);
3844

    
3845
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3846
                        int *data_size_ptr,
3847
                        uint8_t *buf, int buf_size);
3848

    
3849
/**
3850
 * Encode an audio frame from samples into buf.
3851
 *
3852
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3853
 * However, for PCM audio the user will know how much space is needed
3854
 * because it depends on the value passed in buf_size as described
3855
 * below. In that case a lower value can be used.
3856
 *
3857
 * @param avctx the codec context
3858
 * @param[out] buf the output buffer
3859
 * @param[in] buf_size the output buffer size
3860
 * @param[in] samples the input buffer containing the samples
3861
 * The number of samples read from this buffer is frame_size*channels,
3862
 * both of which are defined in avctx.
3863
 * For PCM audio the number of samples read from samples is equal to
3864
 * buf_size * input_sample_size / output_sample_size.
3865
 * @return On error a negative value is returned, on success zero or the number
3866
 * of bytes used to encode the data read from the input buffer.
3867
 */
3868
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3869
                         const short *samples);
3870

    
3871
/**
3872
 * Encode a video frame from pict into buf.
3873
 * The input picture should be
3874
 * stored using a specific format, namely avctx.pix_fmt.
3875
 *
3876
 * @param avctx the codec context
3877
 * @param[out] buf the output buffer for the bitstream of encoded frame
3878
 * @param[in] buf_size the size of the output buffer in bytes
3879
 * @param[in] pict the input picture to encode
3880
 * @return On error a negative value is returned, on success zero or the number
3881
 * of bytes used from the output buffer.
3882
 */
3883
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3884
                         const AVFrame *pict);
3885
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3886
                            const AVSubtitle *sub);
3887

    
3888
int avcodec_close(AVCodecContext *avctx);
3889

    
3890
/**
3891
 * Register all the codecs, parsers and bitstream filters which were enabled at
3892
 * configuration time. If you do not call this function you can select exactly
3893
 * which formats you want to support, by using the individual registration
3894
 * functions.
3895
 *
3896
 * @see avcodec_register
3897
 * @see av_register_codec_parser
3898
 * @see av_register_bitstream_filter
3899
 */
3900
void avcodec_register_all(void);
3901

    
3902
/**
3903
 * Flush buffers, should be called when seeking or when switching to a different stream.
3904
 */
3905
void avcodec_flush_buffers(AVCodecContext *avctx);
3906

    
3907
void avcodec_default_free_buffers(AVCodecContext *s);
3908

    
3909
/* misc useful functions */
3910

    
3911
/**
3912
 * Return a single letter to describe the given picture type pict_type.
3913
 *
3914
 * @param[in] pict_type the picture type
3915
 * @return A single character representing the picture type.
3916
 */
3917
char av_get_pict_type_char(int pict_type);
3918

    
3919
/**
3920
 * Return codec bits per sample.
3921
 *
3922
 * @param[in] codec_id the codec
3923
 * @return Number of bits per sample or zero if unknown for the given codec.
3924
 */
3925
int av_get_bits_per_sample(enum CodecID codec_id);
3926

    
3927
#if FF_API_OLD_SAMPLE_FMT
3928
/**
3929
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3930
 */
3931
attribute_deprecated
3932
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3933
#endif
3934

    
3935
/* frame parsing */
3936
typedef struct AVCodecParserContext {
3937
    void *priv_data;
3938
    struct AVCodecParser *parser;
3939
    int64_t frame_offset; /* offset of the current frame */
3940
    int64_t cur_offset; /* current offset
3941
                           (incremented by each av_parser_parse()) */
3942
    int64_t next_frame_offset; /* offset of the next frame */
3943
    /* video info */
3944
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3945
    /**
3946
     * This field is used for proper frame duration computation in lavf.
3947
     * It signals, how much longer the frame duration of the current frame
3948
     * is compared to normal frame duration.
3949
     *
3950
     * frame_duration = (1 + repeat_pict) * time_base
3951
     *
3952
     * It is used by codecs like H.264 to display telecined material.
3953
     */
3954
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3955
    int64_t pts;     /* pts of the current frame */
3956
    int64_t dts;     /* dts of the current frame */
3957

    
3958
    /* private data */
3959
    int64_t last_pts;
3960
    int64_t last_dts;
3961
    int fetch_timestamp;
3962

    
3963
#define AV_PARSER_PTS_NB 4
3964
    int cur_frame_start_index;
3965
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3966
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3967
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3968

    
3969
    int flags;
3970
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3971
#define PARSER_FLAG_ONCE                      0x0002
3972
/// Set if the parser has a valid file offset
3973
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3974

    
3975
    int64_t offset;      ///< byte offset from starting packet start
3976
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3977

    
3978
    /*!
3979
     * Set by parser to 1 for key frames and 0 for non-key frames.
3980
     * It is initialized to -1, so if the parser doesn't set this flag,
3981
     * old-style fallback using FF_I_TYPE picture type as key frames
3982
     * will be used.
3983
     */
3984
    int key_frame;
3985

    
3986
    /**
3987
     * Time difference in stream time base units from the pts of this
3988
     * packet to the point at which the output from the decoder has converged
3989
     * independent from the availability of previous frames. That is, the
3990
     * frames are virtually identical no matter if decoding started from
3991
     * the very first frame or from this keyframe.
3992
     * Is AV_NOPTS_VALUE if unknown.
3993
     * This field is not the display duration of the current frame.
3994
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3995
     * set.
3996
     *
3997
     * The purpose of this field is to allow seeking in streams that have no
3998
     * keyframes in the conventional sense. It corresponds to the
3999
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
4000
     * essential for some types of subtitle streams to ensure that all
4001
     * subtitles are correctly displayed after seeking.
4002
     */
4003
    int64_t convergence_duration;
4004

    
4005
    // Timestamp generation support:
4006
    /**
4007
     * Synchronization point for start of timestamp generation.
4008
     *
4009
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
4010
     * (default).
4011
     *
4012
     * For example, this corresponds to presence of H.264 buffering period
4013
     * SEI message.
4014
     */
4015
    int dts_sync_point;
4016

    
4017
    /**
4018
     * Offset of the current timestamp against last timestamp sync point in
4019
     * units of AVCodecContext.time_base.
4020
     *
4021
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4022
     * contain a valid timestamp offset.
4023
     *
4024
     * Note that the timestamp of sync point has usually a nonzero
4025
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
4026
     * the next frame after timestamp sync point will be usually 1.
4027
     *
4028
     * For example, this corresponds to H.264 cpb_removal_delay.
4029
     */
4030
    int dts_ref_dts_delta;
4031

    
4032
    /**
4033
     * Presentation delay of current frame in units of AVCodecContext.time_base.
4034
     *
4035
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4036
     * contain valid non-negative timestamp delta (presentation time of a frame
4037
     * must not lie in the past).
4038
     *
4039
     * This delay represents the difference between decoding and presentation
4040
     * time of the frame.
4041
     *
4042
     * For example, this corresponds to H.264 dpb_output_delay.
4043
     */
4044
    int pts_dts_delta;
4045

    
4046
    /**
4047
     * Position of the packet in file.
4048
     *
4049
     * Analogous to cur_frame_pts/dts
4050
     */
4051
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
4052

    
4053
    /**
4054
     * Byte position of currently parsed frame in stream.
4055
     */
4056
    int64_t pos;
4057

    
4058
    /**
4059
     * Previous frame byte position.
4060
     */
4061
    int64_t last_pos;
4062
} AVCodecParserContext;
4063

    
4064
typedef struct AVCodecParser {
4065
    int codec_ids[5]; /* several codec IDs are permitted */
4066
    int priv_data_size;
4067
    int (*parser_init)(AVCodecParserContext *s);
4068
    int (*parser_parse)(AVCodecParserContext *s,
4069
                        AVCodecContext *avctx,
4070
                        const uint8_t **poutbuf, int *poutbuf_size,
4071
                        const uint8_t *buf, int buf_size);
4072
    void (*parser_close)(AVCodecParserContext *s);
4073
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
4074
    struct AVCodecParser *next;
4075
} AVCodecParser;
4076

    
4077
AVCodecParser *av_parser_next(AVCodecParser *c);
4078

    
4079
void av_register_codec_parser(AVCodecParser *parser);
4080
AVCodecParserContext *av_parser_init(int codec_id);
4081

    
4082
#if LIBAVCODEC_VERSION_MAJOR < 53
4083
attribute_deprecated
4084
int av_parser_parse(AVCodecParserContext *s,
4085
                    AVCodecContext *avctx,
4086
                    uint8_t **poutbuf, int *poutbuf_size,
4087
                    const uint8_t *buf, int buf_size,
4088
                    int64_t pts, int64_t dts);
4089
#endif
4090

    
4091
/**
4092
 * Parse a packet.
4093
 *
4094
 * @param s             parser context.
4095
 * @param avctx         codec context.
4096
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4097
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4098
 * @param buf           input buffer.
4099
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4100
 * @param pts           input presentation timestamp.
4101
 * @param dts           input decoding timestamp.
4102
 * @param pos           input byte position in stream.
4103
 * @return the number of bytes of the input bitstream used.
4104
 *
4105
 * Example:
4106
 * @code
4107
 *   while(in_len){
4108
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4109
 *                                        in_data, in_len,
4110
 *                                        pts, dts, pos);
4111
 *       in_data += len;
4112
 *       in_len  -= len;
4113
 *
4114
 *       if(size)
4115
 *          decode_frame(data, size);
4116
 *   }
4117
 * @endcode
4118
 */
4119
int av_parser_parse2(AVCodecParserContext *s,
4120
                     AVCodecContext *avctx,
4121
                     uint8_t **poutbuf, int *poutbuf_size,
4122
                     const uint8_t *buf, int buf_size,
4123
                     int64_t pts, int64_t dts,
4124
                     int64_t pos);
4125

    
4126
int av_parser_change(AVCodecParserContext *s,
4127
                     AVCodecContext *avctx,
4128
                     uint8_t **poutbuf, int *poutbuf_size,
4129
                     const uint8_t *buf, int buf_size, int keyframe);
4130
void av_parser_close(AVCodecParserContext *s);
4131

    
4132

    
4133
typedef struct AVBitStreamFilterContext {
4134
    void *priv_data;
4135
    struct AVBitStreamFilter *filter;
4136
    AVCodecParserContext *parser;
4137
    struct AVBitStreamFilterContext *next;
4138
} AVBitStreamFilterContext;
4139

    
4140

    
4141
typedef struct AVBitStreamFilter {
4142
    const char *name;
4143
    int priv_data_size;
4144
    int (*filter)(AVBitStreamFilterContext *bsfc,
4145
                  AVCodecContext *avctx, const char *args,
4146
                  uint8_t **poutbuf, int *poutbuf_size,
4147
                  const uint8_t *buf, int buf_size, int keyframe);
4148
    void (*close)(AVBitStreamFilterContext *bsfc);
4149
    struct AVBitStreamFilter *next;
4150
} AVBitStreamFilter;
4151

    
4152
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4153
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4154
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4155
                               AVCodecContext *avctx, const char *args,
4156
                               uint8_t **poutbuf, int *poutbuf_size,
4157
                               const uint8_t *buf, int buf_size, int keyframe);
4158
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4159

    
4160
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4161

    
4162
/* memory */
4163

    
4164
/**
4165
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4166
 *
4167
 * @see av_realloc
4168
 */
4169
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4170

    
4171
/**
4172
 * Allocate a buffer, reusing the given one if large enough.
4173
 *
4174
 * Contrary to av_fast_realloc the current buffer contents might not be
4175
 * preserved and on error the old buffer is freed, thus no special
4176
 * handling to avoid memleaks is necessary.
4177
 *
4178
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4179
 * @param size size of the buffer *ptr points to
4180
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4181
 *                 *size 0 if an error occurred.
4182
 */
4183
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4184

    
4185
#if LIBAVCODEC_VERSION_MAJOR < 53
4186
/**
4187
 * @deprecated Deprecated in favor of av_image_copy().
4188
 */
4189
attribute_deprecated
4190
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4191
                          uint8_t *src_data[4], int src_linesize[4],
4192
                          enum PixelFormat pix_fmt, int width, int height);
4193
#endif
4194

    
4195
/**
4196
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4197
 */
4198
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4199
                     enum PixelFormat pix_fmt, int width, int height);
4200

    
4201
/**
4202
 * Crop image top and left side.
4203
 */
4204
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4205
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4206

    
4207
/**
4208
 * Pad image.
4209
 */
4210
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4211
            int padtop, int padbottom, int padleft, int padright, int *color);
4212

    
4213
/**
4214
 * Encode extradata length to a buffer. Used by xiph codecs.
4215
 *
4216
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4217
 * @param v size of extradata in bytes
4218
 * @return number of bytes written to the buffer.
4219
 */
4220
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4221

    
4222
#if LIBAVCODEC_VERSION_MAJOR < 53
4223
/**
4224
 * Parse str and put in width_ptr and height_ptr the detected values.
4225
 *
4226
 * @deprecated Deprecated in favor of av_parse_video_size().
4227
 */
4228
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4229

    
4230
/**
4231
 * Parse str and store the detected values in *frame_rate.
4232
 *
4233
 * @deprecated Deprecated in favor of av_parse_video_rate().
4234
 */
4235
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4236
#endif
4237

    
4238
/**
4239
 * Logs a generic warning message about a missing feature. This function is
4240
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4241
 * only, and would normally not be used by applications.
4242
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4243
 * a pointer to an AVClass struct
4244
 * @param[in] feature string containing the name of the missing feature
4245
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4246
 * If want_sample is non-zero, additional verbage will be added to the log
4247
 * message which tells the user how to report samples to the development
4248
 * mailing list.
4249
 */
4250
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4251

    
4252
/**
4253
 * Log a generic warning message asking for a sample. This function is
4254
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4255
 * only, and would normally not be used by applications.
4256
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4257
 * a pointer to an AVClass struct
4258
 * @param[in] msg string containing an optional message, or NULL if no message
4259
 */
4260
void av_log_ask_for_sample(void *avc, const char *msg);
4261

    
4262
/**
4263
 * Register the hardware accelerator hwaccel.
4264
 */
4265
void av_register_hwaccel(AVHWAccel *hwaccel);
4266

    
4267
/**
4268
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4269
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4270
 * after hwaccel, or NULL if hwaccel is the last one.
4271
 */
4272
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4273

    
4274

    
4275
/**
4276
 * Lock operation used by lockmgr
4277
 */
4278
enum AVLockOp {
4279
  AV_LOCK_CREATE,  ///< Create a mutex
4280
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4281
  AV_LOCK_RELEASE, ///< Unlock the mutex
4282
  AV_LOCK_DESTROY, ///< Free mutex resources
4283
};
4284

    
4285
/**
4286
 * Register a user provided lock manager supporting the operations
4287
 * specified by AVLockOp. mutex points to a (void *) where the
4288
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4289
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4290
 *
4291
 * @param cb User defined callback. Note: Libav may invoke calls to this
4292
 *           callback during the call to av_lockmgr_register().
4293
 *           Thus, the application must be prepared to handle that.
4294
 *           If cb is set to NULL the lockmgr will be unregistered.
4295
 *           Also note that during unregistration the previously registered
4296
 *           lockmgr callback may also be invoked.
4297
 */
4298
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4299

    
4300
#endif /* AVCODEC_AVCODEC_H */