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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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/**
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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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    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 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
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    to be the native codec channel order. */
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#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
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#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 */
419
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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421
/**
422
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
423
 * This is mainly needed because some optimized bitstream readers read
424
 * 32 or 64 bit at once and could read over the end.<br>
425
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
426
 * MPEG bitstreams could cause overread and segfault.
427
 */
428
#define FF_INPUT_BUFFER_PADDING_SIZE 8
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430
/**
431
 * minimum encoding buffer size
432
 * Used to avoid some checks during header writing.
433
 */
434
#define FF_MIN_BUFFER_SIZE 16384
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436

    
437
/**
438
 * motion estimation type.
439
 */
440
enum Motion_Est_ID {
441
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
442
    ME_FULL,
443
    ME_LOG,
444
    ME_PHODS,
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    ME_EPZS,        ///< enhanced predictive zonal search
446
    ME_X1,          ///< reserved for experiments
447
    ME_HEX,         ///< hexagon based search
448
    ME_UMH,         ///< uneven multi-hexagon search
449
    ME_ITER,        ///< iterative search
450
    ME_TESA,        ///< transformed exhaustive search algorithm
451
};
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453
enum AVDiscard{
454
    /* We leave some space between them for extensions (drop some
455
     * keyframes for intra-only or drop just some bidir frames). */
456
    AVDISCARD_NONE   =-16, ///< discard nothing
457
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
458
    AVDISCARD_NONREF =  8, ///< discard all non reference
459
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
460
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
461
    AVDISCARD_ALL    = 48, ///< discard all
462
};
463

    
464
enum AVColorPrimaries{
465
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
466
    AVCOL_PRI_UNSPECIFIED=2,
467
    AVCOL_PRI_BT470M     =4,
468
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
469
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
470
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
471
    AVCOL_PRI_FILM       =8,
472
    AVCOL_PRI_NB           , ///< Not part of ABI
473
};
474

    
475
enum AVColorTransferCharacteristic{
476
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
477
    AVCOL_TRC_UNSPECIFIED=2,
478
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
479
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
480
    AVCOL_TRC_NB           , ///< Not part of ABI
481
};
482

    
483
enum AVColorSpace{
484
    AVCOL_SPC_RGB        =0,
485
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
486
    AVCOL_SPC_UNSPECIFIED=2,
487
    AVCOL_SPC_FCC        =4,
488
    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
489
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
490
    AVCOL_SPC_SMPTE240M  =7,
491
    AVCOL_SPC_NB           , ///< Not part of ABI
492
};
493

    
494
enum AVColorRange{
495
    AVCOL_RANGE_UNSPECIFIED=0,
496
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
497
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
498
    AVCOL_RANGE_NB           , ///< Not part of ABI
499
};
500

    
501
/**
502
 *  X   X      3 4 X      X are luma samples,
503
 *             1 2        1-6 are possible chroma positions
504
 *  X   X      5 6 X      0 is undefined/unknown position
505
 */
506
enum AVChromaLocation{
507
    AVCHROMA_LOC_UNSPECIFIED=0,
508
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
509
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
510
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
511
    AVCHROMA_LOC_TOP        =4,
512
    AVCHROMA_LOC_BOTTOMLEFT =5,
513
    AVCHROMA_LOC_BOTTOM     =6,
514
    AVCHROMA_LOC_NB           , ///< Not part of ABI
515
};
516

    
517
/**
518
 * LPC analysis type
519
 */
520
enum AVLPCType {
521
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
522
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
523
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
524
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
525
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
526
    AV_LPC_TYPE_NB              , ///< Not part of ABI
527
};
528

    
529
enum AVAudioServiceType {
530
    AV_AUDIO_SERVICE_TYPE_MAIN              = 0,
531
    AV_AUDIO_SERVICE_TYPE_EFFECTS           = 1,
532
    AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
533
    AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED  = 3,
534
    AV_AUDIO_SERVICE_TYPE_DIALOGUE          = 4,
535
    AV_AUDIO_SERVICE_TYPE_COMMENTARY        = 5,
536
    AV_AUDIO_SERVICE_TYPE_EMERGENCY         = 6,
537
    AV_AUDIO_SERVICE_TYPE_VOICE_OVER        = 7,
538
    AV_AUDIO_SERVICE_TYPE_KARAOKE           = 8,
539
    AV_AUDIO_SERVICE_TYPE_NB                   , ///< Not part of ABI
540
};
541

    
542
typedef struct RcOverride{
543
    int start_frame;
544
    int end_frame;
545
    int qscale; // If this is 0 then quality_factor will be used instead.
546
    float quality_factor;
547
} RcOverride;
548

    
549
#define FF_MAX_B_FRAMES 16
550

    
551
/* encoding support
552
   These flags can be passed in AVCodecContext.flags before initialization.
553
   Note: Not everything is supported yet.
554
*/
555

    
556
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
557
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
558
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
559
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
560
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
561
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
562
/**
563
 * The parent program guarantees that the input for B-frames containing
564
 * streams is not written to for at least s->max_b_frames+1 frames, if
565
 * this is not set the input will be copied.
566
 */
567
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
568
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
569
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
570
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
571
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
572
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
573
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
574
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
575
                                                  location instead of only at frame boundaries. */
576
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
577
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
578
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
579
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
580
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
581
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
582
/* Fx : Flag for h263+ extra options */
583
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
584
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
585
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
586
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
587
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
588
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
589
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
590
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
591
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
592
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
593
#define CODEC_FLAG_CLOSED_GOP     0x80000000
594
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
595
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
596
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
597
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
598
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
599
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
600
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
601
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
602
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
603
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
604
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
605
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
606
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
607
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
608
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
609
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
610
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
611
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
612
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
613
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
614
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
615
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
616

    
617
/* Unsupported options :
618
 *              Syntax Arithmetic coding (SAC)
619
 *              Reference Picture Selection
620
 *              Independent Segment Decoding */
621
/* /Fx */
622
/* codec capabilities */
623

    
624
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
625
/**
626
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
627
 * If not set, it might not use get_buffer() at all or use operations that
628
 * assume the buffer was allocated by avcodec_default_get_buffer.
629
 */
630
#define CODEC_CAP_DR1             0x0002
631
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
632
#define CODEC_CAP_PARSE_ONLY      0x0004
633
#define CODEC_CAP_TRUNCATED       0x0008
634
/* Codec can export data for HW decoding (XvMC). */
635
#define CODEC_CAP_HWACCEL         0x0010
636
/**
637
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
638
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
639
 */
640
#define CODEC_CAP_DELAY           0x0020
641
/**
642
 * Codec can be fed a final frame with a smaller size.
643
 * This can be used to prevent truncation of the last audio samples.
644
 */
645
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
646
/**
647
 * Codec can export data for HW decoding (VDPAU).
648
 */
649
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
650
/**
651
 * Codec can output multiple frames per AVPacket
652
 * Normally demuxers return one frame at a time, demuxers which do not do
653
 * are connected to a parser to split what they return into proper frames.
654
 * This flag is reserved to the very rare category of codecs which have a
655
 * bitstream that cannot be split into frames without timeconsuming
656
 * operations like full decoding. Demuxers carring such bitstreams thus
657
 * may return multiple frames in a packet. This has many disadvantages like
658
 * prohibiting stream copy in many cases thus it should only be considered
659
 * as a last resort.
660
 */
661
#define CODEC_CAP_SUBFRAMES        0x0100
662
/**
663
 * Codec is experimental and is thus avoided in favor of non experimental
664
 * encoders
665
 */
666
#define CODEC_CAP_EXPERIMENTAL     0x0200
667
/**
668
 * Codec should fill in channel configuration and samplerate instead of container
669
 */
670
#define CODEC_CAP_CHANNEL_CONF     0x0400
671
/**
672
 * Codec is able to deal with negative linesizes
673
 */
674
#define CODEC_CAP_NEG_LINESIZES    0x0800
675
/**
676
 * Codec supports frame-level multithreading.
677
 */
678
#define CODEC_CAP_FRAME_THREADS    0x1000
679
/**
680
 * Codec supports slice-based (or partition-based) multithreading.
681
 */
682
#define CODEC_CAP_SLICE_THREADS    0x2000
683

    
684
//The following defines may change, don't expect compatibility if you use them.
685
#define MB_TYPE_INTRA4x4   0x0001
686
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
687
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
688
#define MB_TYPE_16x16      0x0008
689
#define MB_TYPE_16x8       0x0010
690
#define MB_TYPE_8x16       0x0020
691
#define MB_TYPE_8x8        0x0040
692
#define MB_TYPE_INTERLACED 0x0080
693
#define MB_TYPE_DIRECT2    0x0100 //FIXME
694
#define MB_TYPE_ACPRED     0x0200
695
#define MB_TYPE_GMC        0x0400
696
#define MB_TYPE_SKIP       0x0800
697
#define MB_TYPE_P0L0       0x1000
698
#define MB_TYPE_P1L0       0x2000
699
#define MB_TYPE_P0L1       0x4000
700
#define MB_TYPE_P1L1       0x8000
701
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
702
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
703
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
704
#define MB_TYPE_QUANT      0x00010000
705
#define MB_TYPE_CBP        0x00020000
706
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
707

    
708
/**
709
 * Pan Scan area.
710
 * This specifies the area which should be displayed.
711
 * Note there may be multiple such areas for one frame.
712
 */
713
typedef struct AVPanScan{
714
    /**
715
     * id
716
     * - encoding: Set by user.
717
     * - decoding: Set by libavcodec.
718
     */
719
    int id;
720

    
721
    /**
722
     * width and height in 1/16 pel
723
     * - encoding: Set by user.
724
     * - decoding: Set by libavcodec.
725
     */
726
    int width;
727
    int height;
728

    
729
    /**
730
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
731
     * - encoding: Set by user.
732
     * - decoding: Set by libavcodec.
733
     */
734
    int16_t position[3][2];
735
}AVPanScan;
736

    
737
#define FF_COMMON_FRAME \
738
    /**\
739
     * pointer to the picture planes.\
740
     * This might be different from the first allocated byte\
741
     * - encoding: \
742
     * - decoding: \
743
     */\
744
    uint8_t *data[4];\
745
    int linesize[4];\
746
    /**\
747
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
748
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
749
     * - encoding: \
750
     * - decoding: \
751
     */\
752
    uint8_t *base[4];\
753
    /**\
754
     * 1 -> keyframe, 0-> not\
755
     * - encoding: Set by libavcodec.\
756
     * - decoding: Set by libavcodec.\
757
     */\
758
    int key_frame;\
759
\
760
    /**\
761
     * Picture type of the frame, see ?_TYPE below.\
762
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
763
     * - decoding: Set by libavcodec.\
764
     */\
765
    int pict_type;\
766
\
767
    /**\
768
     * presentation timestamp in time_base units (time when frame should be shown to user)\
769
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
770
     * - encoding: MUST be set by user.\
771
     * - decoding: Set by libavcodec.\
772
     */\
773
    int64_t pts;\
774
\
775
    /**\
776
     * picture number in bitstream order\
777
     * - encoding: set by\
778
     * - decoding: Set by libavcodec.\
779
     */\
780
    int coded_picture_number;\
781
    /**\
782
     * picture number in display order\
783
     * - encoding: set by\
784
     * - decoding: Set by libavcodec.\
785
     */\
786
    int display_picture_number;\
787
\
788
    /**\
789
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
790
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
791
     * - decoding: Set by libavcodec.\
792
     */\
793
    int quality; \
794
\
795
    /**\
796
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
797
     * Set to INT_MAX if the buffer has not been used yet.\
798
     * - encoding: unused\
799
     * - decoding: MUST be set by get_buffer().\
800
     */\
801
    int age;\
802
\
803
    /**\
804
     * is this picture used as reference\
805
     * The values for this are the same as the MpegEncContext.picture_structure\
806
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
807
     * Set to 4 for delayed, non-reference frames.\
808
     * - encoding: unused\
809
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
810
     */\
811
    int reference;\
812
\
813
    /**\
814
     * QP table\
815
     * - encoding: unused\
816
     * - decoding: Set by libavcodec.\
817
     */\
818
    int8_t *qscale_table;\
819
    /**\
820
     * QP store stride\
821
     * - encoding: unused\
822
     * - decoding: Set by libavcodec.\
823
     */\
824
    int qstride;\
825
\
826
    /**\
827
     * mbskip_table[mb]>=1 if MB didn't change\
828
     * stride= mb_width = (width+15)>>4\
829
     * - encoding: unused\
830
     * - decoding: Set by libavcodec.\
831
     */\
832
    uint8_t *mbskip_table;\
833
\
834
    /**\
835
     * motion vector table\
836
     * @code\
837
     * example:\
838
     * int mv_sample_log2= 4 - motion_subsample_log2;\
839
     * int mb_width= (width+15)>>4;\
840
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
841
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
842
     * @endcode\
843
     * - encoding: Set by user.\
844
     * - decoding: Set by libavcodec.\
845
     */\
846
    int16_t (*motion_val[2])[2];\
847
\
848
    /**\
849
     * macroblock type table\
850
     * mb_type_base + mb_width + 2\
851
     * - encoding: Set by user.\
852
     * - decoding: Set by libavcodec.\
853
     */\
854
    uint32_t *mb_type;\
855
\
856
    /**\
857
     * log2 of the size of the block which a single vector in motion_val represents: \
858
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
859
     * - encoding: unused\
860
     * - decoding: Set by libavcodec.\
861
     */\
862
    uint8_t motion_subsample_log2;\
863
\
864
    /**\
865
     * for some private data of the user\
866
     * - encoding: unused\
867
     * - decoding: Set by user.\
868
     */\
869
    void *opaque;\
870
\
871
    /**\
872
     * error\
873
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
874
     * - decoding: unused\
875
     */\
876
    uint64_t error[4];\
877
\
878
    /**\
879
     * type of the buffer (to keep track of who has to deallocate data[*])\
880
     * - encoding: Set by the one who allocates it.\
881
     * - decoding: Set by the one who allocates it.\
882
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
883
     */\
884
    int type;\
885
    \
886
    /**\
887
     * When decoding, this signals how much the picture must be delayed.\
888
     * extra_delay = repeat_pict / (2*fps)\
889
     * - encoding: unused\
890
     * - decoding: Set by libavcodec.\
891
     */\
892
    int repeat_pict;\
893
    \
894
    /**\
895
     * \
896
     */\
897
    int qscale_type;\
898
    \
899
    /**\
900
     * The content of the picture is interlaced.\
901
     * - encoding: Set by user.\
902
     * - decoding: Set by libavcodec. (default 0)\
903
     */\
904
    int interlaced_frame;\
905
    \
906
    /**\
907
     * If the content is interlaced, is top field displayed first.\
908
     * - encoding: Set by user.\
909
     * - decoding: Set by libavcodec.\
910
     */\
911
    int top_field_first;\
912
    \
913
    /**\
914
     * Pan scan.\
915
     * - encoding: Set by user.\
916
     * - decoding: Set by libavcodec.\
917
     */\
918
    AVPanScan *pan_scan;\
919
    \
920
    /**\
921
     * Tell user application that palette has changed from previous frame.\
922
     * - encoding: ??? (no palette-enabled encoder yet)\
923
     * - decoding: Set by libavcodec. (default 0).\
924
     */\
925
    int palette_has_changed;\
926
    \
927
    /**\
928
     * codec suggestion on buffer type if != 0\
929
     * - encoding: unused\
930
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
931
     */\
932
    int buffer_hints;\
933
\
934
    /**\
935
     * DCT coefficients\
936
     * - encoding: unused\
937
     * - decoding: Set by libavcodec.\
938
     */\
939
    short *dct_coeff;\
940
\
941
    /**\
942
     * motion reference frame index\
943
     * the order in which these are stored can depend on the codec.\
944
     * - encoding: Set by user.\
945
     * - decoding: Set by libavcodec.\
946
     */\
947
    int8_t *ref_index[2];\
948
\
949
    /**\
950
     * reordered opaque 64bit (generally an integer or a double precision float\
951
     * PTS but can be anything). \
952
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
953
     * that time,\
954
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
955
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
956
     * @deprecated in favor of pkt_pts\
957
     * - encoding: unused\
958
     * - decoding: Read by user.\
959
     */\
960
    int64_t reordered_opaque;\
961
\
962
    /**\
963
     * hardware accelerator private data (Libav-allocated)\
964
     * - encoding: unused\
965
     * - decoding: Set by libavcodec\
966
     */\
967
    void *hwaccel_picture_private;\
968
\
969
    /**\
970
     * reordered pts from the last AVPacket that has been input into the decoder\
971
     * - encoding: unused\
972
     * - decoding: Read by user.\
973
     */\
974
    int64_t pkt_pts;\
975
\
976
    /**\
977
     * dts from the last AVPacket that has been input into the decoder\
978
     * - encoding: unused\
979
     * - decoding: Read by user.\
980
     */\
981
    int64_t pkt_dts;\
982
\
983
    /**\
984
     * the AVCodecContext which ff_thread_get_buffer() was last called on\
985
     * - encoding: Set by libavcodec.\
986
     * - decoding: Set by libavcodec.\
987
     */\
988
    struct AVCodecContext *owner;\
989
\
990
    /**\
991
     * used by multithreading to store frame-specific info\
992
     * - encoding: Set by libavcodec.\
993
     * - decoding: Set by libavcodec.\
994
     */\
995
    void *thread_opaque;\
996

    
997
#define FF_QSCALE_TYPE_MPEG1 0
998
#define FF_QSCALE_TYPE_MPEG2 1
999
#define FF_QSCALE_TYPE_H264  2
1000
#define FF_QSCALE_TYPE_VP56  3
1001

    
1002
#define FF_BUFFER_TYPE_INTERNAL 1
1003
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1004
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1005
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1006

    
1007

    
1008
#define FF_I_TYPE  1 ///< Intra
1009
#define FF_P_TYPE  2 ///< Predicted
1010
#define FF_B_TYPE  3 ///< Bi-dir predicted
1011
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1012
#define FF_SI_TYPE 5 ///< Switching Intra
1013
#define FF_SP_TYPE 6 ///< Switching Predicted
1014
#define FF_BI_TYPE 7
1015

    
1016
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1017
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1018
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1019
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1020

    
1021
enum AVPacketSideDataType {
1022
    AV_PKT_DATA_PALETTE,
1023
};
1024

    
1025
typedef struct AVPacket {
1026
    /**
1027
     * Presentation timestamp in AVStream->time_base units; the time at which
1028
     * the decompressed packet will be presented to the user.
1029
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1030
     * pts MUST be larger or equal to dts as presentation cannot happen before
1031
     * decompression, unless one wants to view hex dumps. Some formats misuse
1032
     * the terms dts and pts/cts to mean something different. Such timestamps
1033
     * must be converted to true pts/dts before they are stored in AVPacket.
1034
     */
1035
    int64_t pts;
1036
    /**
1037
     * Decompression timestamp in AVStream->time_base units; the time at which
1038
     * the packet is decompressed.
1039
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1040
     */
1041
    int64_t dts;
1042
    uint8_t *data;
1043
    int   size;
1044
    int   stream_index;
1045
    int   flags;
1046
    /**
1047
     * Additional packet data that can be provided by the container.
1048
     * Packet can contain several types of side information.
1049
     */
1050
    struct {
1051
        uint8_t *data;
1052
        int      size;
1053
        enum AVPacketSideDataType type;
1054
    } *side_data;
1055
    int side_data_elems;
1056

    
1057
    /**
1058
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1059
     * Equals next_pts - this_pts in presentation order.
1060
     */
1061
    int   duration;
1062
    void  (*destruct)(struct AVPacket *);
1063
    void  *priv;
1064
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1065

    
1066
    /**
1067
     * Time difference in AVStream->time_base units from the pts of this
1068
     * packet to the point at which the output from the decoder has converged
1069
     * independent from the availability of previous frames. That is, the
1070
     * frames are virtually identical no matter if decoding started from
1071
     * the very first frame or from this keyframe.
1072
     * Is AV_NOPTS_VALUE if unknown.
1073
     * This field is not the display duration of the current packet.
1074
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1075
     * set.
1076
     *
1077
     * The purpose of this field is to allow seeking in streams that have no
1078
     * keyframes in the conventional sense. It corresponds to the
1079
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1080
     * essential for some types of subtitle streams to ensure that all
1081
     * subtitles are correctly displayed after seeking.
1082
     */
1083
    int64_t convergence_duration;
1084
} AVPacket;
1085
#define AV_PKT_FLAG_KEY   0x0001
1086

    
1087
/**
1088
 * Audio Video Frame.
1089
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1090
 * bumps.
1091
 * Removal, reordering and changes to existing fields require a major
1092
 * version bump. No fields should be added into AVFrame before or after
1093
 * FF_COMMON_FRAME!
1094
 * sizeof(AVFrame) must not be used outside libav*.
1095
 */
1096
typedef struct AVFrame {
1097
    FF_COMMON_FRAME
1098
} AVFrame;
1099

    
1100
/**
1101
 * main external API structure.
1102
 * New fields can be added to the end with minor version bumps.
1103
 * Removal, reordering and changes to existing fields require a major
1104
 * version bump.
1105
 * sizeof(AVCodecContext) must not be used outside libav*.
1106
 */
1107
typedef struct AVCodecContext {
1108
    /**
1109
     * information on struct for av_log
1110
     * - set by avcodec_alloc_context
1111
     */
1112
    const AVClass *av_class;
1113
    /**
1114
     * the average bitrate
1115
     * - encoding: Set by user; unused for constant quantizer encoding.
1116
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1117
     */
1118
    int bit_rate;
1119

    
1120
    /**
1121
     * number of bits the bitstream is allowed to diverge from the reference.
1122
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1123
     * - encoding: Set by user; unused for constant quantizer encoding.
1124
     * - decoding: unused
1125
     */
1126
    int bit_rate_tolerance;
1127

    
1128
    /**
1129
     * CODEC_FLAG_*.
1130
     * - encoding: Set by user.
1131
     * - decoding: Set by user.
1132
     */
1133
    int flags;
1134

    
1135
    /**
1136
     * Some codecs need additional format info. It is stored here.
1137
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1138
     * specific codec MUST set it correctly otherwise stream copy breaks.
1139
     * In general use of this field by muxers is not recommanded.
1140
     * - encoding: Set by libavcodec.
1141
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1142
     */
1143
    int sub_id;
1144

    
1145
    /**
1146
     * Motion estimation algorithm used for video coding.
1147
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1148
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1149
     * - encoding: MUST be set by user.
1150
     * - decoding: unused
1151
     */
1152
    int me_method;
1153

    
1154
    /**
1155
     * some codecs need / can use extradata like Huffman tables.
1156
     * mjpeg: Huffman tables
1157
     * rv10: additional flags
1158
     * mpeg4: global headers (they can be in the bitstream or here)
1159
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1160
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1161
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1162
     * - encoding: Set/allocated/freed by libavcodec.
1163
     * - decoding: Set/allocated/freed by user.
1164
     */
1165
    uint8_t *extradata;
1166
    int extradata_size;
1167

    
1168
    /**
1169
     * This is the fundamental unit of time (in seconds) in terms
1170
     * of which frame timestamps are represented. For fixed-fps content,
1171
     * timebase should be 1/framerate and timestamp increments should be
1172
     * identically 1.
1173
     * - encoding: MUST be set by user.
1174
     * - decoding: Set by libavcodec.
1175
     */
1176
    AVRational time_base;
1177

    
1178
    /* video only */
1179
    /**
1180
     * picture width / height.
1181
     * - encoding: MUST be set by user.
1182
     * - decoding: Set by libavcodec.
1183
     * Note: For compatibility it is possible to set this instead of
1184
     * coded_width/height before decoding.
1185
     */
1186
    int width, height;
1187

    
1188
#define FF_ASPECT_EXTENDED 15
1189

    
1190
    /**
1191
     * the number of pictures in a group of pictures, or 0 for intra_only
1192
     * - encoding: Set by user.
1193
     * - decoding: unused
1194
     */
1195
    int gop_size;
1196

    
1197
    /**
1198
     * Pixel format, see PIX_FMT_xxx.
1199
     * May be set by the demuxer if known from headers.
1200
     * May be overriden by the decoder if it knows better.
1201
     * - encoding: Set by user.
1202
     * - decoding: Set by user if known, overridden by libavcodec if known
1203
     */
1204
    enum PixelFormat pix_fmt;
1205

    
1206
    /**
1207
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1208
     * decoder to draw a horizontal band. It improves cache usage. Not
1209
     * all codecs can do that. You must check the codec capabilities
1210
     * beforehand.
1211
     * When multithreading is used, it may be called from multiple threads
1212
     * at the same time; threads might draw different parts of the same AVFrame,
1213
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1214
     * in order.
1215
     * The function is also used by hardware acceleration APIs.
1216
     * It is called at least once during frame decoding to pass
1217
     * the data needed for hardware render.
1218
     * In that mode instead of pixel data, AVFrame points to
1219
     * a structure specific to the acceleration API. The application
1220
     * reads the structure and can change some fields to indicate progress
1221
     * or mark state.
1222
     * - encoding: unused
1223
     * - decoding: Set by user.
1224
     * @param height the height of the slice
1225
     * @param y the y position of the slice
1226
     * @param type 1->top field, 2->bottom field, 3->frame
1227
     * @param offset offset into the AVFrame.data from which the slice should be read
1228
     */
1229
    void (*draw_horiz_band)(struct AVCodecContext *s,
1230
                            const AVFrame *src, int offset[4],
1231
                            int y, int type, int height);
1232

    
1233
    /* audio only */
1234
    int sample_rate; ///< samples per second
1235
    int channels;    ///< number of audio channels
1236

    
1237
    /**
1238
     * audio sample format
1239
     * - encoding: Set by user.
1240
     * - decoding: Set by libavcodec.
1241
     */
1242
    enum AVSampleFormat sample_fmt;  ///< sample format
1243

    
1244
    /* The following data should not be initialized. */
1245
    /**
1246
     * Samples per packet, initialized when calling 'init'.
1247
     */
1248
    int frame_size;
1249
    int frame_number;   ///< audio or video frame number
1250

    
1251
    /**
1252
     * Number of frames the decoded output will be delayed relative to
1253
     * the encoded input.
1254
     * - encoding: Set by libavcodec.
1255
     * - decoding: unused
1256
     */
1257
    int delay;
1258

    
1259
    /* - encoding parameters */
1260
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1261
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1262

    
1263
    /**
1264
     * minimum quantizer
1265
     * - encoding: Set by user.
1266
     * - decoding: unused
1267
     */
1268
    int qmin;
1269

    
1270
    /**
1271
     * maximum quantizer
1272
     * - encoding: Set by user.
1273
     * - decoding: unused
1274
     */
1275
    int qmax;
1276

    
1277
    /**
1278
     * maximum quantizer difference between frames
1279
     * - encoding: Set by user.
1280
     * - decoding: unused
1281
     */
1282
    int max_qdiff;
1283

    
1284
    /**
1285
     * maximum number of B-frames between non-B-frames
1286
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1287
     * - encoding: Set by user.
1288
     * - decoding: unused
1289
     */
1290
    int max_b_frames;
1291

    
1292
    /**
1293
     * qscale factor between IP and B-frames
1294
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1295
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1296
     * - encoding: Set by user.
1297
     * - decoding: unused
1298
     */
1299
    float b_quant_factor;
1300

    
1301
    /** obsolete FIXME remove */
1302
    int rc_strategy;
1303
#define FF_RC_STRATEGY_XVID 1
1304

    
1305
    int b_frame_strategy;
1306

    
1307
    struct AVCodec *codec;
1308

    
1309
    void *priv_data;
1310

    
1311
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1312
                            /* do its best to deliver a chunk with size     */
1313
                            /* below rtp_payload_size, the chunk will start */
1314
                            /* with a start code on some codecs like H.263. */
1315
                            /* This doesn't take account of any particular  */
1316
                            /* headers inside the transmitted RTP payload.  */
1317

    
1318

    
1319
    /* The RTP callback: This function is called    */
1320
    /* every time the encoder has a packet to send. */
1321
    /* It depends on the encoder if the data starts */
1322
    /* with a Start Code (it should). H.263 does.   */
1323
    /* mb_nb contains the number of macroblocks     */
1324
    /* encoded in the RTP payload.                  */
1325
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1326

    
1327
    /* statistics, used for 2-pass encoding */
1328
    int mv_bits;
1329
    int header_bits;
1330
    int i_tex_bits;
1331
    int p_tex_bits;
1332
    int i_count;
1333
    int p_count;
1334
    int skip_count;
1335
    int misc_bits;
1336

    
1337
    /**
1338
     * number of bits used for the previously encoded frame
1339
     * - encoding: Set by libavcodec.
1340
     * - decoding: unused
1341
     */
1342
    int frame_bits;
1343

    
1344
    /**
1345
     * Private data of the user, can be used to carry app specific stuff.
1346
     * - encoding: Set by user.
1347
     * - decoding: Set by user.
1348
     */
1349
    void *opaque;
1350

    
1351
    char codec_name[32];
1352
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1353
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1354

    
1355
    /**
1356
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1357
     * This is used to work around some encoder bugs.
1358
     * A demuxer should set this to what is stored in the field used to identify the codec.
1359
     * If there are multiple such fields in a container then the demuxer should choose the one
1360
     * which maximizes the information about the used codec.
1361
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1362
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1363
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1364
     * first.
1365
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1366
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1367
     */
1368
    unsigned int codec_tag;
1369

    
1370
    /**
1371
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1372
     * - encoding: Set by user
1373
     * - decoding: Set by user
1374
     */
1375
    int workaround_bugs;
1376
#define FF_BUG_AUTODETECT       1  ///< autodetection
1377
#define FF_BUG_OLD_MSMPEG4      2
1378
#define FF_BUG_XVID_ILACE       4
1379
#define FF_BUG_UMP4             8
1380
#define FF_BUG_NO_PADDING       16
1381
#define FF_BUG_AMV              32
1382
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1383
#define FF_BUG_QPEL_CHROMA      64
1384
#define FF_BUG_STD_QPEL         128
1385
#define FF_BUG_QPEL_CHROMA2     256
1386
#define FF_BUG_DIRECT_BLOCKSIZE 512
1387
#define FF_BUG_EDGE             1024
1388
#define FF_BUG_HPEL_CHROMA      2048
1389
#define FF_BUG_DC_CLIP          4096
1390
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1391
#define FF_BUG_TRUNCATED       16384
1392
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1393

    
1394
    /**
1395
     * luma single coefficient elimination threshold
1396
     * - encoding: Set by user.
1397
     * - decoding: unused
1398
     */
1399
    int luma_elim_threshold;
1400

    
1401
    /**
1402
     * chroma single coeff elimination threshold
1403
     * - encoding: Set by user.
1404
     * - decoding: unused
1405
     */
1406
    int chroma_elim_threshold;
1407

    
1408
    /**
1409
     * strictly follow the standard (MPEG4, ...).
1410
     * - encoding: Set by user.
1411
     * - decoding: Set by user.
1412
     * Setting this to STRICT or higher means the encoder and decoder will
1413
     * generally do stupid things, whereas setting it to unofficial or lower
1414
     * will mean the encoder might produce output that is not supported by all
1415
     * spec-compliant decoders. Decoders don't differentiate between normal,
1416
     * unofficial and experimental (that is, they always try to decode things
1417
     * when they can) unless they are explicitly asked to behave stupidly
1418
     * (=strictly conform to the specs)
1419
     */
1420
    int strict_std_compliance;
1421
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1422
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1423
#define FF_COMPLIANCE_NORMAL        0
1424
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1425
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1426

    
1427
    /**
1428
     * qscale offset between IP and B-frames
1429
     * - encoding: Set by user.
1430
     * - decoding: unused
1431
     */
1432
    float b_quant_offset;
1433

    
1434
    /**
1435
     * Error recognization; higher values will detect more errors but may
1436
     * misdetect some more or less valid parts as errors.
1437
     * - encoding: unused
1438
     * - decoding: Set by user.
1439
     */
1440
    int error_recognition;
1441
#define FF_ER_CAREFUL         1
1442
#define FF_ER_COMPLIANT       2
1443
#define FF_ER_AGGRESSIVE      3
1444
#define FF_ER_VERY_AGGRESSIVE 4
1445

    
1446
    /**
1447
     * Called at the beginning of each frame to get a buffer for it.
1448
     * If pic.reference is set then the frame will be read later by libavcodec.
1449
     * avcodec_align_dimensions2() should be used to find the required width and
1450
     * height, as they normally need to be rounded up to the next multiple of 16.
1451
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1452
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1453
     * some other means.
1454
     * If frame multithreading is used and thread_safe_callbacks is set,
1455
     * it may be called from a different thread, but not from more than one at once.
1456
     * Does not need to be reentrant.
1457
     * - encoding: unused
1458
     * - decoding: Set by libavcodec, user can override.
1459
     */
1460
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1461

    
1462
    /**
1463
     * Called to release buffers which were allocated with get_buffer.
1464
     * A released buffer can be reused in get_buffer().
1465
     * pic.data[*] must be set to NULL.
1466
     * May be called from a different thread if frame multithreading is used,
1467
     * but not by more than one thread at once, so does not need to be reentrant.
1468
     * - encoding: unused
1469
     * - decoding: Set by libavcodec, user can override.
1470
     */
1471
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1472

    
1473
    /**
1474
     * Size of the frame reordering buffer in the decoder.
1475
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1476
     * - encoding: Set by libavcodec.
1477
     * - decoding: Set by libavcodec.
1478
     */
1479
    int has_b_frames;
1480

    
1481
    /**
1482
     * number of bytes per packet if constant and known or 0
1483
     * Used by some WAV based audio codecs.
1484
     */
1485
    int block_align;
1486

    
1487
    int parse_only; /* - decoding only: If true, only parsing is done
1488
                       (function avcodec_parse_frame()). The frame
1489
                       data is returned. Only MPEG codecs support this now. */
1490

    
1491
    /**
1492
     * 0-> h263 quant 1-> mpeg quant
1493
     * - encoding: Set by user.
1494
     * - decoding: unused
1495
     */
1496
    int mpeg_quant;
1497

    
1498
    /**
1499
     * pass1 encoding statistics output buffer
1500
     * - encoding: Set by libavcodec.
1501
     * - decoding: unused
1502
     */
1503
    char *stats_out;
1504

    
1505
    /**
1506
     * pass2 encoding statistics input buffer
1507
     * Concatenated stuff from stats_out of pass1 should be placed here.
1508
     * - encoding: Allocated/set/freed by user.
1509
     * - decoding: unused
1510
     */
1511
    char *stats_in;
1512

    
1513
    /**
1514
     * ratecontrol qmin qmax limiting method
1515
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1516
     * - encoding: Set by user.
1517
     * - decoding: unused
1518
     */
1519
    float rc_qsquish;
1520

    
1521
    float rc_qmod_amp;
1522
    int rc_qmod_freq;
1523

    
1524
    /**
1525
     * ratecontrol override, see RcOverride
1526
     * - encoding: Allocated/set/freed by user.
1527
     * - decoding: unused
1528
     */
1529
    RcOverride *rc_override;
1530
    int rc_override_count;
1531

    
1532
    /**
1533
     * rate control equation
1534
     * - encoding: Set by user
1535
     * - decoding: unused
1536
     */
1537
    const char *rc_eq;
1538

    
1539
    /**
1540
     * maximum bitrate
1541
     * - encoding: Set by user.
1542
     * - decoding: unused
1543
     */
1544
    int rc_max_rate;
1545

    
1546
    /**
1547
     * minimum bitrate
1548
     * - encoding: Set by user.
1549
     * - decoding: unused
1550
     */
1551
    int rc_min_rate;
1552

    
1553
    /**
1554
     * decoder bitstream buffer size
1555
     * - encoding: Set by user.
1556
     * - decoding: unused
1557
     */
1558
    int rc_buffer_size;
1559
    float rc_buffer_aggressivity;
1560

    
1561
    /**
1562
     * qscale factor between P and I-frames
1563
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1564
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1565
     * - encoding: Set by user.
1566
     * - decoding: unused
1567
     */
1568
    float i_quant_factor;
1569

    
1570
    /**
1571
     * qscale offset between P and I-frames
1572
     * - encoding: Set by user.
1573
     * - decoding: unused
1574
     */
1575
    float i_quant_offset;
1576

    
1577
    /**
1578
     * initial complexity for pass1 ratecontrol
1579
     * - encoding: Set by user.
1580
     * - decoding: unused
1581
     */
1582
    float rc_initial_cplx;
1583

    
1584
    /**
1585
     * DCT algorithm, see FF_DCT_* below
1586
     * - encoding: Set by user.
1587
     * - decoding: unused
1588
     */
1589
    int dct_algo;
1590
#define FF_DCT_AUTO    0
1591
#define FF_DCT_FASTINT 1
1592
#define FF_DCT_INT     2
1593
#define FF_DCT_MMX     3
1594
#define FF_DCT_MLIB    4
1595
#define FF_DCT_ALTIVEC 5
1596
#define FF_DCT_FAAN    6
1597

    
1598
    /**
1599
     * luminance masking (0-> disabled)
1600
     * - encoding: Set by user.
1601
     * - decoding: unused
1602
     */
1603
    float lumi_masking;
1604

    
1605
    /**
1606
     * temporary complexity masking (0-> disabled)
1607
     * - encoding: Set by user.
1608
     * - decoding: unused
1609
     */
1610
    float temporal_cplx_masking;
1611

    
1612
    /**
1613
     * spatial complexity masking (0-> disabled)
1614
     * - encoding: Set by user.
1615
     * - decoding: unused
1616
     */
1617
    float spatial_cplx_masking;
1618

    
1619
    /**
1620
     * p block masking (0-> disabled)
1621
     * - encoding: Set by user.
1622
     * - decoding: unused
1623
     */
1624
    float p_masking;
1625

    
1626
    /**
1627
     * darkness masking (0-> disabled)
1628
     * - encoding: Set by user.
1629
     * - decoding: unused
1630
     */
1631
    float dark_masking;
1632

    
1633
    /**
1634
     * IDCT algorithm, see FF_IDCT_* below.
1635
     * - encoding: Set by user.
1636
     * - decoding: Set by user.
1637
     */
1638
    int idct_algo;
1639
#define FF_IDCT_AUTO          0
1640
#define FF_IDCT_INT           1
1641
#define FF_IDCT_SIMPLE        2
1642
#define FF_IDCT_SIMPLEMMX     3
1643
#define FF_IDCT_LIBMPEG2MMX   4
1644
#define FF_IDCT_PS2           5
1645
#define FF_IDCT_MLIB          6
1646
#define FF_IDCT_ARM           7
1647
#define FF_IDCT_ALTIVEC       8
1648
#define FF_IDCT_SH4           9
1649
#define FF_IDCT_SIMPLEARM     10
1650
#define FF_IDCT_H264          11
1651
#define FF_IDCT_VP3           12
1652
#define FF_IDCT_IPP           13
1653
#define FF_IDCT_XVIDMMX       14
1654
#define FF_IDCT_CAVS          15
1655
#define FF_IDCT_SIMPLEARMV5TE 16
1656
#define FF_IDCT_SIMPLEARMV6   17
1657
#define FF_IDCT_SIMPLEVIS     18
1658
#define FF_IDCT_WMV2          19
1659
#define FF_IDCT_FAAN          20
1660
#define FF_IDCT_EA            21
1661
#define FF_IDCT_SIMPLENEON    22
1662
#define FF_IDCT_SIMPLEALPHA   23
1663
#define FF_IDCT_BINK          24
1664

    
1665
    /**
1666
     * slice count
1667
     * - encoding: Set by libavcodec.
1668
     * - decoding: Set by user (or 0).
1669
     */
1670
    int slice_count;
1671
    /**
1672
     * slice offsets in the frame in bytes
1673
     * - encoding: Set/allocated by libavcodec.
1674
     * - decoding: Set/allocated by user (or NULL).
1675
     */
1676
    int *slice_offset;
1677

    
1678
    /**
1679
     * error concealment flags
1680
     * - encoding: unused
1681
     * - decoding: Set by user.
1682
     */
1683
    int error_concealment;
1684
#define FF_EC_GUESS_MVS   1
1685
#define FF_EC_DEBLOCK     2
1686

    
1687
    /**
1688
     * dsp_mask could be add used to disable unwanted CPU features
1689
     * CPU features (i.e. MMX, SSE. ...)
1690
     *
1691
     * With the FORCE flag you may instead enable given CPU features.
1692
     * (Dangerous: Usable in case of misdetection, improper usage however will
1693
     * result into program crash.)
1694
     */
1695
    unsigned dsp_mask;
1696

    
1697
    /**
1698
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1699
     * - encoding: Set by libavcodec.
1700
     * - decoding: Set by user.
1701
     */
1702
     int bits_per_coded_sample;
1703

    
1704
    /**
1705
     * prediction method (needed for huffyuv)
1706
     * - encoding: Set by user.
1707
     * - decoding: unused
1708
     */
1709
     int prediction_method;
1710
#define FF_PRED_LEFT   0
1711
#define FF_PRED_PLANE  1
1712
#define FF_PRED_MEDIAN 2
1713

    
1714
    /**
1715
     * sample aspect ratio (0 if unknown)
1716
     * That is the width of a pixel divided by the height of the pixel.
1717
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1718
     * - encoding: Set by user.
1719
     * - decoding: Set by libavcodec.
1720
     */
1721
    AVRational sample_aspect_ratio;
1722

    
1723
    /**
1724
     * the picture in the bitstream
1725
     * - encoding: Set by libavcodec.
1726
     * - decoding: Set by libavcodec.
1727
     */
1728
    AVFrame *coded_frame;
1729

    
1730
    /**
1731
     * debug
1732
     * - encoding: Set by user.
1733
     * - decoding: Set by user.
1734
     */
1735
    int debug;
1736
#define FF_DEBUG_PICT_INFO   1
1737
#define FF_DEBUG_RC          2
1738
#define FF_DEBUG_BITSTREAM   4
1739
#define FF_DEBUG_MB_TYPE     8
1740
#define FF_DEBUG_QP          16
1741
#define FF_DEBUG_MV          32
1742
#define FF_DEBUG_DCT_COEFF   0x00000040
1743
#define FF_DEBUG_SKIP        0x00000080
1744
#define FF_DEBUG_STARTCODE   0x00000100
1745
#define FF_DEBUG_PTS         0x00000200
1746
#define FF_DEBUG_ER          0x00000400
1747
#define FF_DEBUG_MMCO        0x00000800
1748
#define FF_DEBUG_BUGS        0x00001000
1749
#define FF_DEBUG_VIS_QP      0x00002000
1750
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1751
#define FF_DEBUG_BUFFERS     0x00008000
1752
#define FF_DEBUG_THREADS     0x00010000
1753

    
1754
    /**
1755
     * debug
1756
     * - encoding: Set by user.
1757
     * - decoding: Set by user.
1758
     */
1759
    int debug_mv;
1760
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1761
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1762
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1763

    
1764
    /**
1765
     * error
1766
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1767
     * - decoding: unused
1768
     */
1769
    uint64_t error[4];
1770

    
1771
#if FF_API_MB_Q
1772
    /**
1773
     * minimum MB quantizer
1774
     * - encoding: unused
1775
     * - decoding: unused
1776
     */
1777
    attribute_deprecated int mb_qmin;
1778

    
1779
    /**
1780
     * maximum MB quantizer
1781
     * - encoding: unused
1782
     * - decoding: unused
1783
     */
1784
    attribute_deprecated int mb_qmax;
1785
#endif
1786

    
1787
    /**
1788
     * motion estimation comparison function
1789
     * - encoding: Set by user.
1790
     * - decoding: unused
1791
     */
1792
    int me_cmp;
1793
    /**
1794
     * subpixel motion estimation comparison function
1795
     * - encoding: Set by user.
1796
     * - decoding: unused
1797
     */
1798
    int me_sub_cmp;
1799
    /**
1800
     * macroblock comparison function (not supported yet)
1801
     * - encoding: Set by user.
1802
     * - decoding: unused
1803
     */
1804
    int mb_cmp;
1805
    /**
1806
     * interlaced DCT comparison function
1807
     * - encoding: Set by user.
1808
     * - decoding: unused
1809
     */
1810
    int ildct_cmp;
1811
#define FF_CMP_SAD    0
1812
#define FF_CMP_SSE    1
1813
#define FF_CMP_SATD   2
1814
#define FF_CMP_DCT    3
1815
#define FF_CMP_PSNR   4
1816
#define FF_CMP_BIT    5
1817
#define FF_CMP_RD     6
1818
#define FF_CMP_ZERO   7
1819
#define FF_CMP_VSAD   8
1820
#define FF_CMP_VSSE   9
1821
#define FF_CMP_NSSE   10
1822
#define FF_CMP_W53    11
1823
#define FF_CMP_W97    12
1824
#define FF_CMP_DCTMAX 13
1825
#define FF_CMP_DCT264 14
1826
#define FF_CMP_CHROMA 256
1827

    
1828
    /**
1829
     * ME diamond size & shape
1830
     * - encoding: Set by user.
1831
     * - decoding: unused
1832
     */
1833
    int dia_size;
1834

    
1835
    /**
1836
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1837
     * - encoding: Set by user.
1838
     * - decoding: unused
1839
     */
1840
    int last_predictor_count;
1841

    
1842
    /**
1843
     * prepass for motion estimation
1844
     * - encoding: Set by user.
1845
     * - decoding: unused
1846
     */
1847
    int pre_me;
1848

    
1849
    /**
1850
     * motion estimation prepass comparison function
1851
     * - encoding: Set by user.
1852
     * - decoding: unused
1853
     */
1854
    int me_pre_cmp;
1855

    
1856
    /**
1857
     * ME prepass diamond size & shape
1858
     * - encoding: Set by user.
1859
     * - decoding: unused
1860
     */
1861
    int pre_dia_size;
1862

    
1863
    /**
1864
     * subpel ME quality
1865
     * - encoding: Set by user.
1866
     * - decoding: unused
1867
     */
1868
    int me_subpel_quality;
1869

    
1870
    /**
1871
     * callback to negotiate the pixelFormat
1872
     * @param fmt is the list of formats which are supported by the codec,
1873
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1874
     * The first is always the native one.
1875
     * @return the chosen format
1876
     * - encoding: unused
1877
     * - decoding: Set by user, if not set the native format will be chosen.
1878
     */
1879
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1880

    
1881
    /**
1882
     * DTG active format information (additional aspect ratio
1883
     * information only used in DVB MPEG-2 transport streams)
1884
     * 0 if not set.
1885
     *
1886
     * - encoding: unused
1887
     * - decoding: Set by decoder.
1888
     */
1889
    int dtg_active_format;
1890
#define FF_DTG_AFD_SAME         8
1891
#define FF_DTG_AFD_4_3          9
1892
#define FF_DTG_AFD_16_9         10
1893
#define FF_DTG_AFD_14_9         11
1894
#define FF_DTG_AFD_4_3_SP_14_9  13
1895
#define FF_DTG_AFD_16_9_SP_14_9 14
1896
#define FF_DTG_AFD_SP_4_3       15
1897

    
1898
    /**
1899
     * maximum motion estimation search range in subpel units
1900
     * If 0 then no limit.
1901
     *
1902
     * - encoding: Set by user.
1903
     * - decoding: unused
1904
     */
1905
    int me_range;
1906

    
1907
    /**
1908
     * intra quantizer bias
1909
     * - encoding: Set by user.
1910
     * - decoding: unused
1911
     */
1912
    int intra_quant_bias;
1913
#define FF_DEFAULT_QUANT_BIAS 999999
1914

    
1915
    /**
1916
     * inter quantizer bias
1917
     * - encoding: Set by user.
1918
     * - decoding: unused
1919
     */
1920
    int inter_quant_bias;
1921

    
1922
    /**
1923
     * color table ID
1924
     * - encoding: unused
1925
     * - decoding: Which clrtable should be used for 8bit RGB images.
1926
     *             Tables have to be stored somewhere. FIXME
1927
     */
1928
    int color_table_id;
1929

    
1930
    /**
1931
     * internal_buffer count
1932
     * Don't touch, used by libavcodec default_get_buffer().
1933
     */
1934
    int internal_buffer_count;
1935

    
1936
    /**
1937
     * internal_buffers
1938
     * Don't touch, used by libavcodec default_get_buffer().
1939
     */
1940
    void *internal_buffer;
1941

    
1942
    /**
1943
     * Global quality for codecs which cannot change it per frame.
1944
     * This should be proportional to MPEG-1/2/4 qscale.
1945
     * - encoding: Set by user.
1946
     * - decoding: unused
1947
     */
1948
    int global_quality;
1949

    
1950
#define FF_CODER_TYPE_VLC       0
1951
#define FF_CODER_TYPE_AC        1
1952
#define FF_CODER_TYPE_RAW       2
1953
#define FF_CODER_TYPE_RLE       3
1954
#define FF_CODER_TYPE_DEFLATE   4
1955
    /**
1956
     * coder type
1957
     * - encoding: Set by user.
1958
     * - decoding: unused
1959
     */
1960
    int coder_type;
1961

    
1962
    /**
1963
     * context model
1964
     * - encoding: Set by user.
1965
     * - decoding: unused
1966
     */
1967
    int context_model;
1968
#if 0
1969
    /**
1970
     *
1971
     * - encoding: unused
1972
     * - decoding: Set by user.
1973
     */
1974
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1975
#endif
1976

    
1977
    /**
1978
     * slice flags
1979
     * - encoding: unused
1980
     * - decoding: Set by user.
1981
     */
1982
    int slice_flags;
1983
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1984
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1985
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1986

    
1987
    /**
1988
     * XVideo Motion Acceleration
1989
     * - encoding: forbidden
1990
     * - decoding: set by decoder
1991
     */
1992
    int xvmc_acceleration;
1993

    
1994
    /**
1995
     * macroblock decision mode
1996
     * - encoding: Set by user.
1997
     * - decoding: unused
1998
     */
1999
    int mb_decision;
2000
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2001
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2002
#define FF_MB_DECISION_RD     2        ///< rate distortion
2003

    
2004
    /**
2005
     * custom intra quantization matrix
2006
     * - encoding: Set by user, can be NULL.
2007
     * - decoding: Set by libavcodec.
2008
     */
2009
    uint16_t *intra_matrix;
2010

    
2011
    /**
2012
     * custom inter quantization matrix
2013
     * - encoding: Set by user, can be NULL.
2014
     * - decoding: Set by libavcodec.
2015
     */
2016
    uint16_t *inter_matrix;
2017

    
2018
    /**
2019
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2020
     * This is used to work around some encoder bugs.
2021
     * - encoding: unused
2022
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2023
     */
2024
    unsigned int stream_codec_tag;
2025

    
2026
    /**
2027
     * scene change detection threshold
2028
     * 0 is default, larger means fewer detected scene changes.
2029
     * - encoding: Set by user.
2030
     * - decoding: unused
2031
     */
2032
    int scenechange_threshold;
2033

    
2034
    /**
2035
     * minimum Lagrange multipler
2036
     * - encoding: Set by user.
2037
     * - decoding: unused
2038
     */
2039
    int lmin;
2040

    
2041
    /**
2042
     * maximum Lagrange multipler
2043
     * - encoding: Set by user.
2044
     * - decoding: unused
2045
     */
2046
    int lmax;
2047

    
2048
#if FF_API_PALETTE_CONTROL
2049
    /**
2050
     * palette control structure
2051
     * - encoding: ??? (no palette-enabled encoder yet)
2052
     * - decoding: Set by user.
2053
     */
2054
    struct AVPaletteControl *palctrl;
2055
#endif
2056

    
2057
    /**
2058
     * noise reduction strength
2059
     * - encoding: Set by user.
2060
     * - decoding: unused
2061
     */
2062
    int noise_reduction;
2063

    
2064
    /**
2065
     * Called at the beginning of a frame to get cr buffer for it.
2066
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2067
     * libavcodec will pass previous buffer in pic, function should return
2068
     * same buffer or new buffer with old frame "painted" into it.
2069
     * If pic.data[0] == NULL must behave like get_buffer().
2070
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2071
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2072
     * some other means.
2073
     * - encoding: unused
2074
     * - decoding: Set by libavcodec, user can override.
2075
     */
2076
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2077

    
2078
    /**
2079
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2080
     * - encoding: Set by user.
2081
     * - decoding: unused
2082
     */
2083
    int rc_initial_buffer_occupancy;
2084

    
2085
    /**
2086
     *
2087
     * - encoding: Set by user.
2088
     * - decoding: unused
2089
     */
2090
    int inter_threshold;
2091

    
2092
    /**
2093
     * CODEC_FLAG2_*
2094
     * - encoding: Set by user.
2095
     * - decoding: Set by user.
2096
     */
2097
    int flags2;
2098

    
2099
    /**
2100
     * Simulates errors in the bitstream to test error concealment.
2101
     * - encoding: Set by user.
2102
     * - decoding: unused
2103
     */
2104
    int error_rate;
2105

    
2106
#if FF_API_ANTIALIAS_ALGO
2107
    /**
2108
     * MP3 antialias algorithm, see FF_AA_* below.
2109
     * - encoding: unused
2110
     * - decoding: Set by user.
2111
     */
2112
    attribute_deprecated int antialias_algo;
2113
#define FF_AA_AUTO    0
2114
#define FF_AA_FASTINT 1 //not implemented yet
2115
#define FF_AA_INT     2
2116
#define FF_AA_FLOAT   3
2117
#endif
2118

    
2119
    /**
2120
     * quantizer noise shaping
2121
     * - encoding: Set by user.
2122
     * - decoding: unused
2123
     */
2124
    int quantizer_noise_shaping;
2125

    
2126
    /**
2127
     * thread count
2128
     * is used to decide how many independent tasks should be passed to execute()
2129
     * - encoding: Set by user.
2130
     * - decoding: Set by user.
2131
     */
2132
    int thread_count;
2133

    
2134
    /**
2135
     * The codec may call this to execute several independent things.
2136
     * It will return only after finishing all tasks.
2137
     * The user may replace this with some multithreaded implementation,
2138
     * the default implementation will execute the parts serially.
2139
     * @param count the number of things to execute
2140
     * - encoding: Set by libavcodec, user can override.
2141
     * - decoding: Set by libavcodec, user can override.
2142
     */
2143
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2144

    
2145
    /**
2146
     * thread opaque
2147
     * Can be used by execute() to store some per AVCodecContext stuff.
2148
     * - encoding: set by execute()
2149
     * - decoding: set by execute()
2150
     */
2151
    void *thread_opaque;
2152

    
2153
    /**
2154
     * Motion estimation threshold below which no motion estimation is
2155
     * performed, but instead the user specified motion vectors are used.
2156
     *
2157
     * - encoding: Set by user.
2158
     * - decoding: unused
2159
     */
2160
     int me_threshold;
2161

    
2162
    /**
2163
     * Macroblock threshold below which the user specified macroblock types will be used.
2164
     * - encoding: Set by user.
2165
     * - decoding: unused
2166
     */
2167
     int mb_threshold;
2168

    
2169
    /**
2170
     * precision of the intra DC coefficient - 8
2171
     * - encoding: Set by user.
2172
     * - decoding: unused
2173
     */
2174
     int intra_dc_precision;
2175

    
2176
    /**
2177
     * noise vs. sse weight for the nsse comparsion function
2178
     * - encoding: Set by user.
2179
     * - decoding: unused
2180
     */
2181
     int nsse_weight;
2182

    
2183
    /**
2184
     * Number of macroblock rows at the top which are skipped.
2185
     * - encoding: unused
2186
     * - decoding: Set by user.
2187
     */
2188
     int skip_top;
2189

    
2190
    /**
2191
     * Number of macroblock rows at the bottom which are skipped.
2192
     * - encoding: unused
2193
     * - decoding: Set by user.
2194
     */
2195
     int skip_bottom;
2196

    
2197
    /**
2198
     * profile
2199
     * - encoding: Set by user.
2200
     * - decoding: Set by libavcodec.
2201
     */
2202
     int profile;
2203
#define FF_PROFILE_UNKNOWN -99
2204
#define FF_PROFILE_RESERVED -100
2205

    
2206
#define FF_PROFILE_AAC_MAIN 0
2207
#define FF_PROFILE_AAC_LOW  1
2208
#define FF_PROFILE_AAC_SSR  2
2209
#define FF_PROFILE_AAC_LTP  3
2210

    
2211
#define FF_PROFILE_DTS         20
2212
#define FF_PROFILE_DTS_ES      30
2213
#define FF_PROFILE_DTS_96_24   40
2214
#define FF_PROFILE_DTS_HD_HRA  50
2215
#define FF_PROFILE_DTS_HD_MA   60
2216

    
2217
#define FF_PROFILE_MPEG2_422    0
2218
#define FF_PROFILE_MPEG2_HIGH   1
2219
#define FF_PROFILE_MPEG2_SS     2
2220
#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
2221
#define FF_PROFILE_MPEG2_MAIN   4
2222
#define FF_PROFILE_MPEG2_SIMPLE 5
2223

    
2224
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2225
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2226

    
2227
#define FF_PROFILE_H264_BASELINE             66
2228
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2229
#define FF_PROFILE_H264_MAIN                 77
2230
#define FF_PROFILE_H264_EXTENDED             88
2231
#define FF_PROFILE_H264_HIGH                 100
2232
#define FF_PROFILE_H264_HIGH_10              110
2233
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2234
#define FF_PROFILE_H264_HIGH_422             122
2235
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2236
#define FF_PROFILE_H264_HIGH_444             144
2237
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2238
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2239
#define FF_PROFILE_H264_CAVLC_444            44
2240

    
2241
#define FF_PROFILE_VC1_SIMPLE   0
2242
#define FF_PROFILE_VC1_MAIN     1
2243
#define FF_PROFILE_VC1_COMPLEX  2
2244
#define FF_PROFILE_VC1_ADVANCED 3
2245

    
2246
    /**
2247
     * level
2248
     * - encoding: Set by user.
2249
     * - decoding: Set by libavcodec.
2250
     */
2251
     int level;
2252
#define FF_LEVEL_UNKNOWN -99
2253

    
2254
    /**
2255
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2256
     * - encoding: unused
2257
     * - decoding: Set by user.
2258
     */
2259
     int lowres;
2260

    
2261
    /**
2262
     * Bitstream width / height, may be different from width/height if lowres
2263
     * or other things are used.
2264
     * - encoding: unused
2265
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2266
     */
2267
    int coded_width, coded_height;
2268

    
2269
    /**
2270
     * frame skip threshold
2271
     * - encoding: Set by user.
2272
     * - decoding: unused
2273
     */
2274
    int frame_skip_threshold;
2275

    
2276
    /**
2277
     * frame skip factor
2278
     * - encoding: Set by user.
2279
     * - decoding: unused
2280
     */
2281
    int frame_skip_factor;
2282

    
2283
    /**
2284
     * frame skip exponent
2285
     * - encoding: Set by user.
2286
     * - decoding: unused
2287
     */
2288
    int frame_skip_exp;
2289

    
2290
    /**
2291
     * frame skip comparison function
2292
     * - encoding: Set by user.
2293
     * - decoding: unused
2294
     */
2295
    int frame_skip_cmp;
2296

    
2297
    /**
2298
     * Border processing masking, raises the quantizer for mbs on the borders
2299
     * of the picture.
2300
     * - encoding: Set by user.
2301
     * - decoding: unused
2302
     */
2303
    float border_masking;
2304

    
2305
    /**
2306
     * minimum MB lagrange multipler
2307
     * - encoding: Set by user.
2308
     * - decoding: unused
2309
     */
2310
    int mb_lmin;
2311

    
2312
    /**
2313
     * maximum MB lagrange multipler
2314
     * - encoding: Set by user.
2315
     * - decoding: unused
2316
     */
2317
    int mb_lmax;
2318

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

    
2326
    /**
2327
     *
2328
     * - encoding: unused
2329
     * - decoding: Set by user.
2330
     */
2331
    enum AVDiscard skip_loop_filter;
2332

    
2333
    /**
2334
     *
2335
     * - encoding: unused
2336
     * - decoding: Set by user.
2337
     */
2338
    enum AVDiscard skip_idct;
2339

    
2340
    /**
2341
     *
2342
     * - encoding: unused
2343
     * - decoding: Set by user.
2344
     */
2345
    enum AVDiscard skip_frame;
2346

    
2347
    /**
2348
     *
2349
     * - encoding: Set by user.
2350
     * - decoding: unused
2351
     */
2352
    int bidir_refine;
2353

    
2354
    /**
2355
     *
2356
     * - encoding: Set by user.
2357
     * - decoding: unused
2358
     */
2359
    int brd_scale;
2360

    
2361
    /**
2362
     * constant rate factor - quality-based VBR - values ~correspond to qps
2363
     * - encoding: Set by user.
2364
     * - decoding: unused
2365
     */
2366
    float crf;
2367

    
2368
    /**
2369
     * constant quantization parameter rate control method
2370
     * - encoding: Set by user.
2371
     * - decoding: unused
2372
     */
2373
    int cqp;
2374

    
2375
    /**
2376
     * minimum GOP size
2377
     * - encoding: Set by user.
2378
     * - decoding: unused
2379
     */
2380
    int keyint_min;
2381

    
2382
    /**
2383
     * number of reference frames
2384
     * - encoding: Set by user.
2385
     * - decoding: Set by lavc.
2386
     */
2387
    int refs;
2388

    
2389
    /**
2390
     * chroma qp offset from luma
2391
     * - encoding: Set by user.
2392
     * - decoding: unused
2393
     */
2394
    int chromaoffset;
2395

    
2396
    /**
2397
     * Influences how often B-frames are used.
2398
     * - encoding: Set by user.
2399
     * - decoding: unused
2400
     */
2401
    int bframebias;
2402

    
2403
    /**
2404
     * trellis RD quantization
2405
     * - encoding: Set by user.
2406
     * - decoding: unused
2407
     */
2408
    int trellis;
2409

    
2410
    /**
2411
     * Reduce fluctuations in qp (before curve compression).
2412
     * - encoding: Set by user.
2413
     * - decoding: unused
2414
     */
2415
    float complexityblur;
2416

    
2417
    /**
2418
     * in-loop deblocking filter alphac0 parameter
2419
     * alpha is in the range -6...6
2420
     * - encoding: Set by user.
2421
     * - decoding: unused
2422
     */
2423
    int deblockalpha;
2424

    
2425
    /**
2426
     * in-loop deblocking filter beta parameter
2427
     * beta is in the range -6...6
2428
     * - encoding: Set by user.
2429
     * - decoding: unused
2430
     */
2431
    int deblockbeta;
2432

    
2433
    /**
2434
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2435
     * - encoding: Set by user.
2436
     * - decoding: unused
2437
     */
2438
    int partitions;
2439
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2440
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2441
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2442
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2443
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2444

    
2445
    /**
2446
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2447
     * - encoding: Set by user.
2448
     * - decoding: unused
2449
     */
2450
    int directpred;
2451

    
2452
    /**
2453
     * Audio cutoff bandwidth (0 means "automatic")
2454
     * - encoding: Set by user.
2455
     * - decoding: unused
2456
     */
2457
    int cutoff;
2458

    
2459
    /**
2460
     * Multiplied by qscale for each frame and added to scene_change_score.
2461
     * - encoding: Set by user.
2462
     * - decoding: unused
2463
     */
2464
    int scenechange_factor;
2465

    
2466
    /**
2467
     *
2468
     * Note: Value depends upon the compare function used for fullpel ME.
2469
     * - encoding: Set by user.
2470
     * - decoding: unused
2471
     */
2472
    int mv0_threshold;
2473

    
2474
    /**
2475
     * Adjusts sensitivity of b_frame_strategy 1.
2476
     * - encoding: Set by user.
2477
     * - decoding: unused
2478
     */
2479
    int b_sensitivity;
2480

    
2481
    /**
2482
     * - encoding: Set by user.
2483
     * - decoding: unused
2484
     */
2485
    int compression_level;
2486
#define FF_COMPRESSION_DEFAULT -1
2487

    
2488
    /**
2489
     * LPC coefficient precision - used by FLAC encoder
2490
     * - encoding: Set by user.
2491
     * - decoding: unused
2492
     */
2493
    int lpc_coeff_precision;
2494

    
2495
    /**
2496
     * - encoding: Set by user.
2497
     * - decoding: unused
2498
     */
2499
    int min_prediction_order;
2500

    
2501
    /**
2502
     * - encoding: Set by user.
2503
     * - decoding: unused
2504
     */
2505
    int max_prediction_order;
2506

    
2507
    /**
2508
     * search method for selecting prediction order
2509
     * - encoding: Set by user.
2510
     * - decoding: unused
2511
     */
2512
    int prediction_order_method;
2513

    
2514
    /**
2515
     * - encoding: Set by user.
2516
     * - decoding: unused
2517
     */
2518
    int min_partition_order;
2519

    
2520
    /**
2521
     * - encoding: Set by user.
2522
     * - decoding: unused
2523
     */
2524
    int max_partition_order;
2525

    
2526
    /**
2527
     * GOP timecode frame start number, in non drop frame format
2528
     * - encoding: Set by user.
2529
     * - decoding: unused
2530
     */
2531
    int64_t timecode_frame_start;
2532

    
2533
#if FF_API_REQUEST_CHANNELS
2534
    /**
2535
     * Decoder should decode to this many channels if it can (0 for default)
2536
     * - encoding: unused
2537
     * - decoding: Set by user.
2538
     * @deprecated Deprecated in favor of request_channel_layout.
2539
     */
2540
    int request_channels;
2541
#endif
2542

    
2543
    /**
2544
     * Percentage of dynamic range compression to be applied by the decoder.
2545
     * The default value is 1.0, corresponding to full compression.
2546
     * - encoding: unused
2547
     * - decoding: Set by user.
2548
     */
2549
    float drc_scale;
2550

    
2551
    /**
2552
     * opaque 64bit number (generally a PTS) that will be reordered and
2553
     * output in AVFrame.reordered_opaque
2554
     * @deprecated in favor of pkt_pts
2555
     * - encoding: unused
2556
     * - decoding: Set by user.
2557
     */
2558
    int64_t reordered_opaque;
2559

    
2560
    /**
2561
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2562
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2563
     * - encoding: set by user.
2564
     * - decoding: set by libavcodec.
2565
     */
2566
    int bits_per_raw_sample;
2567

    
2568
    /**
2569
     * Audio channel layout.
2570
     * - encoding: set by user.
2571
     * - decoding: set by libavcodec.
2572
     */
2573
    int64_t channel_layout;
2574

    
2575
    /**
2576
     * Request decoder to use this channel layout if it can (0 for default)
2577
     * - encoding: unused
2578
     * - decoding: Set by user.
2579
     */
2580
    int64_t request_channel_layout;
2581

    
2582
    /**
2583
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2584
     * - encoding: Set by user.
2585
     * - decoding: unused.
2586
     */
2587
    float rc_max_available_vbv_use;
2588

    
2589
    /**
2590
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2591
     * - encoding: Set by user.
2592
     * - decoding: unused.
2593
     */
2594
    float rc_min_vbv_overflow_use;
2595

    
2596
    /**
2597
     * Hardware accelerator in use
2598
     * - encoding: unused.
2599
     * - decoding: Set by libavcodec
2600
     */
2601
    struct AVHWAccel *hwaccel;
2602

    
2603
    /**
2604
     * For some codecs, the time base is closer to the field rate than the frame rate.
2605
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2606
     * if no telecine is used ...
2607
     *
2608
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2609
     */
2610
    int ticks_per_frame;
2611

    
2612
    /**
2613
     * Hardware accelerator context.
2614
     * For some hardware accelerators, a global context needs to be
2615
     * provided by the user. In that case, this holds display-dependent
2616
     * data Libav cannot instantiate itself. Please refer to the
2617
     * Libav HW accelerator documentation to know how to fill this
2618
     * is. e.g. for VA API, this is a struct vaapi_context.
2619
     * - encoding: unused
2620
     * - decoding: Set by user
2621
     */
2622
    void *hwaccel_context;
2623

    
2624
    /**
2625
     * Chromaticity coordinates of the source primaries.
2626
     * - encoding: Set by user
2627
     * - decoding: Set by libavcodec
2628
     */
2629
    enum AVColorPrimaries color_primaries;
2630

    
2631
    /**
2632
     * Color Transfer Characteristic.
2633
     * - encoding: Set by user
2634
     * - decoding: Set by libavcodec
2635
     */
2636
    enum AVColorTransferCharacteristic color_trc;
2637

    
2638
    /**
2639
     * YUV colorspace type.
2640
     * - encoding: Set by user
2641
     * - decoding: Set by libavcodec
2642
     */
2643
    enum AVColorSpace colorspace;
2644

    
2645
    /**
2646
     * MPEG vs JPEG YUV range.
2647
     * - encoding: Set by user
2648
     * - decoding: Set by libavcodec
2649
     */
2650
    enum AVColorRange color_range;
2651

    
2652
    /**
2653
     * This defines the location of chroma samples.
2654
     * - encoding: Set by user
2655
     * - decoding: Set by libavcodec
2656
     */
2657
    enum AVChromaLocation chroma_sample_location;
2658

    
2659
    /**
2660
     * The codec may call this to execute several independent things.
2661
     * It will return only after finishing all tasks.
2662
     * The user may replace this with some multithreaded implementation,
2663
     * the default implementation will execute the parts serially.
2664
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2665
     * @param c context passed also to func
2666
     * @param count the number of things to execute
2667
     * @param arg2 argument passed unchanged to func
2668
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2669
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2670
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2671
     *             two instances of func executing at the same time will have the same threadnr.
2672
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2673
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2674
     * - encoding: Set by libavcodec, user can override.
2675
     * - decoding: Set by libavcodec, user can override.
2676
     */
2677
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2678

    
2679
    /**
2680
     * explicit P-frame weighted prediction analysis method
2681
     * 0: off
2682
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2683
     * 2: smart weighting (full fade detection analysis)
2684
     * - encoding: Set by user.
2685
     * - decoding: unused
2686
     */
2687
    int weighted_p_pred;
2688

    
2689
    /**
2690
     * AQ mode
2691
     * 0: Disabled
2692
     * 1: Variance AQ (complexity mask)
2693
     * 2: Auto-variance AQ (experimental)
2694
     * - encoding: Set by user
2695
     * - decoding: unused
2696
     */
2697
    int aq_mode;
2698

    
2699
    /**
2700
     * AQ strength
2701
     * Reduces blocking and blurring in flat and textured areas.
2702
     * - encoding: Set by user
2703
     * - decoding: unused
2704
     */
2705
    float aq_strength;
2706

    
2707
    /**
2708
     * PSY RD
2709
     * Strength of psychovisual optimization
2710
     * - encoding: Set by user
2711
     * - decoding: unused
2712
     */
2713
    float psy_rd;
2714

    
2715
    /**
2716
     * PSY trellis
2717
     * Strength of psychovisual optimization
2718
     * - encoding: Set by user
2719
     * - decoding: unused
2720
     */
2721
    float psy_trellis;
2722

    
2723
    /**
2724
     * RC lookahead
2725
     * Number of frames for frametype and ratecontrol lookahead
2726
     * - encoding: Set by user
2727
     * - decoding: unused
2728
     */
2729
    int rc_lookahead;
2730

    
2731
    /**
2732
     * Constant rate factor maximum
2733
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2734
     * than crf_max, even if doing so would violate VBV restrictions.
2735
     * - encoding: Set by user.
2736
     * - decoding: unused
2737
     */
2738
    float crf_max;
2739

    
2740
    int log_level_offset;
2741

    
2742
    /**
2743
     * Determines which LPC analysis algorithm to use.
2744
     * - encoding: Set by user
2745
     * - decoding: unused
2746
     */
2747
    enum AVLPCType lpc_type;
2748

    
2749
    /**
2750
     * Number of passes to use for Cholesky factorization during LPC analysis
2751
     * - encoding: Set by user
2752
     * - decoding: unused
2753
     */
2754
    int lpc_passes;
2755

    
2756
    /**
2757
     * Number of slices.
2758
     * Indicates number of picture subdivisions. Used for parallelized
2759
     * decoding.
2760
     * - encoding: Set by user
2761
     * - decoding: unused
2762
     */
2763
    int slices;
2764

    
2765
    /**
2766
     * Header containing style information for text subtitles.
2767
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2768
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2769
     * the Format line following. It shouldn't include any Dialogue line.
2770
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2771
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2772
     */
2773
    uint8_t *subtitle_header;
2774
    int subtitle_header_size;
2775

    
2776
    /**
2777
     * Current packet as passed into the decoder, to avoid having
2778
     * to pass the packet into every function. Currently only valid
2779
     * inside lavc and get/release_buffer callbacks.
2780
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2781
     * - encoding: unused
2782
     */
2783
    AVPacket *pkt;
2784

    
2785
    /**
2786
     * Whether this is a copy of the context which had init() called on it.
2787
     * This is used by multithreading - shared tables and picture pointers
2788
     * should be freed from the original context only.
2789
     * - encoding: Set by libavcodec.
2790
     * - decoding: Set by libavcodec.
2791
     */
2792
    int is_copy;
2793

    
2794
    /**
2795
     * Which multithreading methods to use.
2796
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2797
     * so clients which cannot provide future frames should not use it.
2798
     *
2799
     * - encoding: Set by user, otherwise the default is used.
2800
     * - decoding: Set by user, otherwise the default is used.
2801
     */
2802
    int thread_type;
2803
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2804
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2805

    
2806
    /**
2807
     * Which multithreading methods are in use by the codec.
2808
     * - encoding: Set by libavcodec.
2809
     * - decoding: Set by libavcodec.
2810
     */
2811
    int active_thread_type;
2812

    
2813
    /**
2814
     * Set by the client if its custom get_buffer() callback can be called
2815
     * from another thread, which allows faster multithreaded decoding.
2816
     * draw_horiz_band() will be called from other threads regardless of this setting.
2817
     * Ignored if the default get_buffer() is used.
2818
     * - encoding: Set by user.
2819
     * - decoding: Set by user.
2820
     */
2821
    int thread_safe_callbacks;
2822

    
2823
    /**
2824
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2825
     * Used for compliant TS muxing.
2826
     * - encoding: Set by libavcodec.
2827
     * - decoding: unused.
2828
     */
2829
    uint64_t vbv_delay;
2830

    
2831
    /**
2832
     * Type of service that the audio stream conveys.
2833
     * - encoding: Set by user.
2834
     * - decoding: Set by libavcodec.
2835
     */
2836
    enum AVAudioServiceType audio_service_type;
2837
} AVCodecContext;
2838

    
2839
/**
2840
 * AVProfile.
2841
 */
2842
typedef struct AVProfile {
2843
    int profile;
2844
    const char *name; ///< short name for the profile
2845
} AVProfile;
2846

    
2847
/**
2848
 * AVCodec.
2849
 */
2850
typedef struct AVCodec {
2851
    /**
2852
     * Name of the codec implementation.
2853
     * The name is globally unique among encoders and among decoders (but an
2854
     * encoder and a decoder can share the same name).
2855
     * This is the primary way to find a codec from the user perspective.
2856
     */
2857
    const char *name;
2858
    enum AVMediaType type;
2859
    enum CodecID id;
2860
    int priv_data_size;
2861
    int (*init)(AVCodecContext *);
2862
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2863
    int (*close)(AVCodecContext *);
2864
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2865
    /**
2866
     * Codec capabilities.
2867
     * see CODEC_CAP_*
2868
     */
2869
    int capabilities;
2870
    struct AVCodec *next;
2871
    /**
2872
     * Flush buffers.
2873
     * Will be called when seeking
2874
     */
2875
    void (*flush)(AVCodecContext *);
2876
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2877
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2878
    /**
2879
     * Descriptive name for the codec, meant to be more human readable than name.
2880
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2881
     */
2882
    const char *long_name;
2883
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2884
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2885
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2886
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2887
    const AVClass *priv_class;              ///< AVClass for the private context
2888
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2889

    
2890
    /**
2891
     * @defgroup framethreading Frame-level threading support functions.
2892
     * @{
2893
     */
2894
    /**
2895
     * If defined, called on thread contexts when they are created.
2896
     * If the codec allocates writable tables in init(), re-allocate them here.
2897
     * priv_data will be set to a copy of the original.
2898
     */
2899
    int (*init_thread_copy)(AVCodecContext *);
2900
    /**
2901
     * Copy necessary context variables from a previous thread context to the current one.
2902
     * If not defined, the next thread will start automatically; otherwise, the codec
2903
     * must call ff_thread_finish_setup().
2904
     *
2905
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2906
     */
2907
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2908
    /** @} */
2909
} AVCodec;
2910

    
2911
/**
2912
 * AVHWAccel.
2913
 */
2914
typedef struct AVHWAccel {
2915
    /**
2916
     * Name of the hardware accelerated codec.
2917
     * The name is globally unique among encoders and among decoders (but an
2918
     * encoder and a decoder can share the same name).
2919
     */
2920
    const char *name;
2921

    
2922
    /**
2923
     * Type of codec implemented by the hardware accelerator.
2924
     *
2925
     * See AVMEDIA_TYPE_xxx
2926
     */
2927
    enum AVMediaType type;
2928

    
2929
    /**
2930
     * Codec implemented by the hardware accelerator.
2931
     *
2932
     * See CODEC_ID_xxx
2933
     */
2934
    enum CodecID id;
2935

    
2936
    /**
2937
     * Supported pixel format.
2938
     *
2939
     * Only hardware accelerated formats are supported here.
2940
     */
2941
    enum PixelFormat pix_fmt;
2942

    
2943
    /**
2944
     * Hardware accelerated codec capabilities.
2945
     * see FF_HWACCEL_CODEC_CAP_*
2946
     */
2947
    int capabilities;
2948

    
2949
    struct AVHWAccel *next;
2950

    
2951
    /**
2952
     * Called at the beginning of each frame or field picture.
2953
     *
2954
     * Meaningful frame information (codec specific) is guaranteed to
2955
     * be parsed at this point. This function is mandatory.
2956
     *
2957
     * Note that buf can be NULL along with buf_size set to 0.
2958
     * Otherwise, this means the whole frame is available at this point.
2959
     *
2960
     * @param avctx the codec context
2961
     * @param buf the frame data buffer base
2962
     * @param buf_size the size of the frame in bytes
2963
     * @return zero if successful, a negative value otherwise
2964
     */
2965
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2966

    
2967
    /**
2968
     * Callback for each slice.
2969
     *
2970
     * Meaningful slice information (codec specific) is guaranteed to
2971
     * be parsed at this point. This function is mandatory.
2972
     *
2973
     * @param avctx the codec context
2974
     * @param buf the slice data buffer base
2975
     * @param buf_size the size of the slice in bytes
2976
     * @return zero if successful, a negative value otherwise
2977
     */
2978
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2979

    
2980
    /**
2981
     * Called at the end of each frame or field picture.
2982
     *
2983
     * The whole picture is parsed at this point and can now be sent
2984
     * to the hardware accelerator. This function is mandatory.
2985
     *
2986
     * @param avctx the codec context
2987
     * @return zero if successful, a negative value otherwise
2988
     */
2989
    int (*end_frame)(AVCodecContext *avctx);
2990

    
2991
    /**
2992
     * Size of HW accelerator private data.
2993
     *
2994
     * Private data is allocated with av_mallocz() before
2995
     * AVCodecContext.get_buffer() and deallocated after
2996
     * AVCodecContext.release_buffer().
2997
     */
2998
    int priv_data_size;
2999
} AVHWAccel;
3000

    
3001
/**
3002
 * four components are given, that's all.
3003
 * the last component is alpha
3004
 */
3005
typedef struct AVPicture {
3006
    uint8_t *data[4];
3007
    int linesize[4];       ///< number of bytes per line
3008
} AVPicture;
3009

    
3010
#if FF_API_PALETTE_CONTROL
3011
/**
3012
 * AVPaletteControl
3013
 * This structure defines a method for communicating palette changes
3014
 * between and demuxer and a decoder.
3015
 *
3016
 * @deprecated Use AVPacket to send palette changes instead.
3017
 * This is totally broken.
3018
 */
3019
#define AVPALETTE_SIZE 1024
3020
#define AVPALETTE_COUNT 256
3021
typedef struct AVPaletteControl {
3022

    
3023
    /* Demuxer sets this to 1 to indicate the palette has changed;
3024
     * decoder resets to 0. */
3025
    int palette_changed;
3026

    
3027
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3028
     * the individual palette components should be on a 8-bit scale; if
3029
     * the palette data comes from an IBM VGA native format, the component
3030
     * data is probably 6 bits in size and needs to be scaled. */
3031
    unsigned int palette[AVPALETTE_COUNT];
3032

    
3033
} AVPaletteControl attribute_deprecated;
3034
#endif
3035

    
3036
enum AVSubtitleType {
3037
    SUBTITLE_NONE,
3038

    
3039
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3040

    
3041
    /**
3042
     * Plain text, the text field must be set by the decoder and is
3043
     * authoritative. ass and pict fields may contain approximations.
3044
     */
3045
    SUBTITLE_TEXT,
3046

    
3047
    /**
3048
     * Formatted text, the ass field must be set by the decoder and is
3049
     * authoritative. pict and text fields may contain approximations.
3050
     */
3051
    SUBTITLE_ASS,
3052
};
3053

    
3054
typedef struct AVSubtitleRect {
3055
    int x;         ///< top left corner  of pict, undefined when pict is not set
3056
    int y;         ///< top left corner  of pict, undefined when pict is not set
3057
    int w;         ///< width            of pict, undefined when pict is not set
3058
    int h;         ///< height           of pict, undefined when pict is not set
3059
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3060

    
3061
    /**
3062
     * data+linesize for the bitmap of this subtitle.
3063
     * can be set for text/ass as well once they where rendered
3064
     */
3065
    AVPicture pict;
3066
    enum AVSubtitleType type;
3067

    
3068
    char *text;                     ///< 0 terminated plain UTF-8 text
3069

    
3070
    /**
3071
     * 0 terminated ASS/SSA compatible event line.
3072
     * The pressentation of this is unaffected by the other values in this
3073
     * struct.
3074
     */
3075
    char *ass;
3076
} AVSubtitleRect;
3077

    
3078
typedef struct AVSubtitle {
3079
    uint16_t format; /* 0 = graphics */
3080
    uint32_t start_display_time; /* relative to packet pts, in ms */
3081
    uint32_t end_display_time; /* relative to packet pts, in ms */
3082
    unsigned num_rects;
3083
    AVSubtitleRect **rects;
3084
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3085
} AVSubtitle;
3086

    
3087
/* packet functions */
3088

    
3089
/**
3090
 * @deprecated use NULL instead
3091
 */
3092
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3093

    
3094
/**
3095
 * Default packet destructor.
3096
 */
3097
void av_destruct_packet(AVPacket *pkt);
3098

    
3099
/**
3100
 * Initialize optional fields of a packet with default values.
3101
 *
3102
 * @param pkt packet
3103
 */
3104
void av_init_packet(AVPacket *pkt);
3105

    
3106
/**
3107
 * Allocate the payload of a packet and initialize its fields with
3108
 * default values.
3109
 *
3110
 * @param pkt packet
3111
 * @param size wanted payload size
3112
 * @return 0 if OK, AVERROR_xxx otherwise
3113
 */
3114
int av_new_packet(AVPacket *pkt, int size);
3115

    
3116
/**
3117
 * Reduce packet size, correctly zeroing padding
3118
 *
3119
 * @param pkt packet
3120
 * @param size new size
3121
 */
3122
void av_shrink_packet(AVPacket *pkt, int size);
3123

    
3124
/**
3125
 * Increase packet size, correctly zeroing padding
3126
 *
3127
 * @param pkt packet
3128
 * @param grow_by number of bytes by which to increase the size of the packet
3129
 */
3130
int av_grow_packet(AVPacket *pkt, int grow_by);
3131

    
3132
/**
3133
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3134
 * packet is allocated if it was not really allocated.
3135
 */
3136
int av_dup_packet(AVPacket *pkt);
3137

    
3138
/**
3139
 * Free a packet.
3140
 *
3141
 * @param pkt packet to free
3142
 */
3143
void av_free_packet(AVPacket *pkt);
3144

    
3145
/**
3146
 * Allocate new information of a packet.
3147
 *
3148
 * @param pkt packet
3149
 * @param type side information type
3150
 * @param size side information size
3151
 * @return pointer to fresh allocated data or NULL otherwise
3152
 */
3153
uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3154
                                 int size);
3155

    
3156
/**
3157
 * Get side information from packet.
3158
 *
3159
 * @param pkt packet
3160
 * @param type desired side information type
3161
 * @param size pointer for side information size to store (optional)
3162
 * @return pointer to data if present or NULL otherwise
3163
 */
3164
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3165
                                 int *size);
3166

    
3167
/* resample.c */
3168

    
3169
struct ReSampleContext;
3170
struct AVResampleContext;
3171

    
3172
typedef struct ReSampleContext ReSampleContext;
3173

    
3174
/**
3175
 *  Initialize audio resampling context.
3176
 *
3177
 * @param output_channels  number of output channels
3178
 * @param input_channels   number of input channels
3179
 * @param output_rate      output sample rate
3180
 * @param input_rate       input sample rate
3181
 * @param sample_fmt_out   requested output sample format
3182
 * @param sample_fmt_in    input sample format
3183
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3184
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3185
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3186
                           between the 2 closest, if 0 the closest will be used
3187
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3188
 * @return allocated ReSampleContext, NULL if error occured
3189
 */
3190
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3191
                                        int output_rate, int input_rate,
3192
                                        enum AVSampleFormat sample_fmt_out,
3193
                                        enum AVSampleFormat sample_fmt_in,
3194
                                        int filter_length, int log2_phase_count,
3195
                                        int linear, double cutoff);
3196

    
3197
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3198

    
3199
/**
3200
 * Free resample context.
3201
 *
3202
 * @param s a non-NULL pointer to a resample context previously
3203
 *          created with av_audio_resample_init()
3204
 */
3205
void audio_resample_close(ReSampleContext *s);
3206

    
3207

    
3208
/**
3209
 * Initialize an audio resampler.
3210
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3211
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3212
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3213
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3214
                 between the 2 closest, if 0 the closest will be used
3215
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3216
 */
3217
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3218

    
3219
/**
3220
 * Resample an array of samples using a previously configured context.
3221
 * @param src an array of unconsumed samples
3222
 * @param consumed the number of samples of src which have been consumed are returned here
3223
 * @param src_size the number of unconsumed samples available
3224
 * @param dst_size the amount of space in samples available in dst
3225
 * @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.
3226
 * @return the number of samples written in dst or -1 if an error occurred
3227
 */
3228
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3229

    
3230

    
3231
/**
3232
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3233
 * the resampler parameters, so no audible clicks or similar distortions occur
3234
 * @param compensation_distance distance in output samples over which the compensation should be performed
3235
 * @param sample_delta number of output samples which should be output less
3236
 *
3237
 * example: av_resample_compensate(c, 10, 500)
3238
 * here instead of 510 samples only 500 samples would be output
3239
 *
3240
 * note, due to rounding the actual compensation might be slightly different,
3241
 * especially if the compensation_distance is large and the in_rate used during init is small
3242
 */
3243
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3244
void av_resample_close(struct AVResampleContext *c);
3245

    
3246
/**
3247
 * Allocate memory for a picture.  Call avpicture_free to free it.
3248
 *
3249
 * @param picture the picture to be filled in
3250
 * @param pix_fmt the format of the picture
3251
 * @param width the width of the picture
3252
 * @param height the height of the picture
3253
 * @return zero if successful, a negative value if not
3254
 */
3255
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3256

    
3257
/**
3258
 * Free a picture previously allocated by avpicture_alloc().
3259
 *
3260
 * @param picture the AVPicture to be freed
3261
 */
3262
void avpicture_free(AVPicture *picture);
3263

    
3264
/**
3265
 * Fill in the AVPicture fields.
3266
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3267
 * which points to the image data buffer. Depending on the specified picture
3268
 * format, one or multiple image data pointers and line sizes will be set.
3269
 * If a planar format is specified, several pointers will be set pointing to
3270
 * the different picture planes and the line sizes of the different planes
3271
 * will be stored in the lines_sizes array.
3272
 * Call with ptr == NULL to get the required size for the ptr buffer.
3273
 *
3274
 * @param picture AVPicture whose fields are to be filled in
3275
 * @param ptr Buffer which will contain or contains the actual image data
3276
 * @param pix_fmt The format in which the picture data is stored.
3277
 * @param width the width of the image in pixels
3278
 * @param height the height of the image in pixels
3279
 * @return size of the image data in bytes
3280
 */
3281
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3282
                   enum PixelFormat pix_fmt, int width, int height);
3283
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3284
                     unsigned char *dest, int dest_size);
3285

    
3286
/**
3287
 * Calculate the size in bytes that a picture of the given width and height
3288
 * would occupy if stored in the given picture format.
3289
 * Note that this returns the size of a compact representation as generated
3290
 * by avpicture_layout, which can be smaller than the size required for e.g.
3291
 * avpicture_fill.
3292
 *
3293
 * @param pix_fmt the given picture format
3294
 * @param width the width of the image
3295
 * @param height the height of the image
3296
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3297
 */
3298
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3299
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3300
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3301
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3302

    
3303
/**
3304
 * Return a value representing the fourCC code associated to the
3305
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3306
 * found.
3307
 */
3308
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3309

    
3310
/**
3311
 * Put a string representing the codec tag codec_tag in buf.
3312
 *
3313
 * @param buf_size size in bytes of buf
3314
 * @return the length of the string that would have been generated if
3315
 * enough space had been available, excluding the trailing null
3316
 */
3317
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3318

    
3319
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3320
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3321
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3322
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3323
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3324
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3325

    
3326
/**
3327
 * Compute what kind of losses will occur when converting from one specific
3328
 * pixel format to another.
3329
 * When converting from one pixel format to another, information loss may occur.
3330
 * For example, when converting from RGB24 to GRAY, the color information will
3331
 * be lost. Similarly, other losses occur when converting from some formats to
3332
 * other formats. These losses can involve loss of chroma, but also loss of
3333
 * resolution, loss of color depth, loss due to the color space conversion, loss
3334
 * of the alpha bits or loss due to color quantization.
3335
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3336
 * which will occur when converting from one pixel format to another.
3337
 *
3338
 * @param[in] dst_pix_fmt destination pixel format
3339
 * @param[in] src_pix_fmt source pixel format
3340
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3341
 * @return Combination of flags informing you what kind of losses will occur.
3342
 */
3343
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3344
                             int has_alpha);
3345

    
3346
/**
3347
 * Find the best pixel format to convert to given a certain source pixel
3348
 * format.  When converting from one pixel format to another, information loss
3349
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3350
 * information will be lost. Similarly, other losses occur when converting from
3351
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3352
 * the given pixel formats should be used to suffer the least amount of loss.
3353
 * The pixel formats from which it chooses one, are determined by the
3354
 * pix_fmt_mask parameter.
3355
 *
3356
 * @code
3357
 * src_pix_fmt = PIX_FMT_YUV420P;
3358
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3359
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3360
 * @endcode
3361
 *
3362
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3363
 * @param[in] src_pix_fmt source pixel format
3364
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3365
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3366
 * @return The best pixel format to convert to or -1 if none was found.
3367
 */
3368
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3369
                              int has_alpha, int *loss_ptr);
3370

    
3371
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3372
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3373

    
3374
/**
3375
 * Tell if an image really has transparent alpha values.
3376
 * @return ored mask of FF_ALPHA_xxx constants
3377
 */
3378
int img_get_alpha_info(const AVPicture *src,
3379
                       enum PixelFormat pix_fmt, int width, int height);
3380

    
3381
/* deinterlace a picture */
3382
/* deinterlace - if not supported return -1 */
3383
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3384
                          enum PixelFormat pix_fmt, int width, int height);
3385

    
3386
/* external high level API */
3387

    
3388
/**
3389
 * If c is NULL, returns the first registered codec,
3390
 * if c is non-NULL, returns the next registered codec after c,
3391
 * or NULL if c is the last one.
3392
 */
3393
AVCodec *av_codec_next(AVCodec *c);
3394

    
3395
/**
3396
 * Return the LIBAVCODEC_VERSION_INT constant.
3397
 */
3398
unsigned avcodec_version(void);
3399

    
3400
/**
3401
 * Return the libavcodec build-time configuration.
3402
 */
3403
const char *avcodec_configuration(void);
3404

    
3405
/**
3406
 * Return the libavcodec license.
3407
 */
3408
const char *avcodec_license(void);
3409

    
3410
/**
3411
 * Initialize libavcodec.
3412
 *
3413
 * @warning This function must be called before any other libavcodec
3414
 * function.
3415
 */
3416
void avcodec_init(void);
3417

    
3418
/**
3419
 * Register the codec codec and initialize libavcodec.
3420
 *
3421
 * @see avcodec_init()
3422
 */
3423
void avcodec_register(AVCodec *codec);
3424

    
3425
/**
3426
 * Find a registered encoder with a matching codec ID.
3427
 *
3428
 * @param id CodecID of the requested encoder
3429
 * @return An encoder if one was found, NULL otherwise.
3430
 */
3431
AVCodec *avcodec_find_encoder(enum CodecID id);
3432

    
3433
/**
3434
 * Find a registered encoder with the specified name.
3435
 *
3436
 * @param name name of the requested encoder
3437
 * @return An encoder if one was found, NULL otherwise.
3438
 */
3439
AVCodec *avcodec_find_encoder_by_name(const char *name);
3440

    
3441
/**
3442
 * Find a registered decoder with a matching codec ID.
3443
 *
3444
 * @param id CodecID of the requested decoder
3445
 * @return A decoder if one was found, NULL otherwise.
3446
 */
3447
AVCodec *avcodec_find_decoder(enum CodecID id);
3448

    
3449
/**
3450
 * Find a registered decoder with the specified name.
3451
 *
3452
 * @param name name of the requested decoder
3453
 * @return A decoder if one was found, NULL otherwise.
3454
 */
3455
AVCodec *avcodec_find_decoder_by_name(const char *name);
3456
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3457

    
3458
/**
3459
 * Return a name for the specified profile, if available.
3460
 *
3461
 * @param codec the codec that is searched for the given profile
3462
 * @param profile the profile value for which a name is requested
3463
 * @return A name for the profile if found, NULL otherwise.
3464
 */
3465
const char *av_get_profile_name(const AVCodec *codec, int profile);
3466

    
3467
/**
3468
 * Set the fields of the given AVCodecContext to default values.
3469
 *
3470
 * @param s The AVCodecContext of which the fields should be set to default values.
3471
 */
3472
void avcodec_get_context_defaults(AVCodecContext *s);
3473

    
3474
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3475
 *  we WILL change its arguments and name a few times! */
3476
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3477

    
3478
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3479
 *  we WILL change its arguments and name a few times! */
3480
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3481

    
3482
/**
3483
 * Allocate an AVCodecContext and set its fields to default values.  The
3484
 * resulting struct can be deallocated by simply calling av_free().
3485
 *
3486
 * @return An AVCodecContext filled with default values or NULL on failure.
3487
 * @see avcodec_get_context_defaults
3488
 */
3489
AVCodecContext *avcodec_alloc_context(void);
3490

    
3491
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3492
 *  we WILL change its arguments and name a few times! */
3493
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3494

    
3495
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3496
 *  we WILL change its arguments and name a few times! */
3497
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3498

    
3499
/**
3500
 * Copy the settings of the source AVCodecContext into the destination
3501
 * AVCodecContext. The resulting destination codec context will be
3502
 * unopened, i.e. you are required to call avcodec_open() before you
3503
 * can use this AVCodecContext to decode/encode video/audio data.
3504
 *
3505
 * @param dest target codec context, should be initialized with
3506
 *             avcodec_alloc_context(), but otherwise uninitialized
3507
 * @param src source codec context
3508
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3509
 */
3510
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3511

    
3512
/**
3513
 * Set the fields of the given AVFrame to default values.
3514
 *
3515
 * @param pic The AVFrame of which the fields should be set to default values.
3516
 */
3517
void avcodec_get_frame_defaults(AVFrame *pic);
3518

    
3519
/**
3520
 * Allocate an AVFrame and set its fields to default values.  The resulting
3521
 * struct can be deallocated by simply calling av_free().
3522
 *
3523
 * @return An AVFrame filled with default values or NULL on failure.
3524
 * @see avcodec_get_frame_defaults
3525
 */
3526
AVFrame *avcodec_alloc_frame(void);
3527

    
3528
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3529
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3530
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3531

    
3532
/**
3533
 * Return the amount of padding in pixels which the get_buffer callback must
3534
 * provide around the edge of the image for codecs which do not have the
3535
 * CODEC_FLAG_EMU_EDGE flag.
3536
 *
3537
 * @return Required padding in pixels.
3538
 */
3539
unsigned avcodec_get_edge_width(void);
3540
/**
3541
 * Modify width and height values so that they will result in a memory
3542
 * buffer that is acceptable for the codec if you do not use any horizontal
3543
 * padding.
3544
 *
3545
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3546
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3547
 * according to avcodec_get_edge_width() before.
3548
 */
3549
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3550
/**
3551
 * Modify width and height values so that they will result in a memory
3552
 * buffer that is acceptable for the codec if you also ensure that all
3553
 * line sizes are a multiple of the respective linesize_align[i].
3554
 *
3555
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3556
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3557
 * according to avcodec_get_edge_width() before.
3558
 */
3559
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3560
                               int linesize_align[4]);
3561

    
3562
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3563

    
3564
#if FF_API_THREAD_INIT
3565
/**
3566
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3567
 */
3568
attribute_deprecated
3569
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3570
#endif
3571

    
3572
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3573
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3574
//FIXME func typedef
3575

    
3576
/**
3577
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3578
 * function the context has to be allocated.
3579
 *
3580
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3581
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3582
 * retrieving a codec.
3583
 *
3584
 * @warning This function is not thread safe!
3585
 *
3586
 * @code
3587
 * avcodec_register_all();
3588
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3589
 * if (!codec)
3590
 *     exit(1);
3591
 *
3592
 * context = avcodec_alloc_context();
3593
 *
3594
 * if (avcodec_open(context, codec) < 0)
3595
 *     exit(1);
3596
 * @endcode
3597
 *
3598
 * @param avctx The context which will be set up to use the given codec.
3599
 * @param codec The codec to use within the context.
3600
 * @return zero on success, a negative value on error
3601
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3602
 */
3603
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3604

    
3605
/**
3606
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3607
 * Some decoders may support multiple frames in a single AVPacket, such
3608
 * decoders would then just decode the first frame. In this case,
3609
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3610
 * the remaining data in order to decode the second frame etc.
3611
 * If no frame
3612
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3613
 * decompressed frame size in bytes.
3614
 *
3615
 * @warning You must set frame_size_ptr to the allocated size of the
3616
 * output buffer before calling avcodec_decode_audio3().
3617
 *
3618
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3619
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3620
 * bits at once and could read over the end.
3621
 *
3622
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3623
 * no overreading happens for damaged MPEG streams.
3624
 *
3625
 * @note You might have to align the input buffer avpkt->data and output buffer
3626
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3627
 * necessary at all, on others it won't work at all if not aligned and on others
3628
 * it will work but it will have an impact on performance.
3629
 *
3630
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3631
 * samples should be 16 byte aligned unless the CPU doesn't need it
3632
 * (AltiVec and SSE do).
3633
 *
3634
 * @param avctx the codec context
3635
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3636
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3637
 * @param[in] avpkt The input AVPacket containing the input buffer.
3638
 *            You can create such packet with av_init_packet() and by then setting
3639
 *            data and size, some decoders might in addition need other fields.
3640
 *            All decoders are designed to use the least fields possible though.
3641
 * @return On error a negative value is returned, otherwise the number of bytes
3642
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3643
 */
3644
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3645
                         int *frame_size_ptr,
3646
                         AVPacket *avpkt);
3647

    
3648
/**
3649
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3650
 * Some decoders may support multiple frames in a single AVPacket, such
3651
 * decoders would then just decode the first frame.
3652
 *
3653
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3654
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3655
 * bits at once and could read over the end.
3656
 *
3657
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3658
 * no overreading happens for damaged MPEG streams.
3659
 *
3660
 * @note You might have to align the input buffer avpkt->data.
3661
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3662
 * necessary at all, on others it won't work at all if not aligned and on others
3663
 * it will work but it will have an impact on performance.
3664
 *
3665
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3666
 *
3667
 * @note Some codecs have a delay between input and output, these need to be
3668
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3669
 *
3670
 * @param avctx the codec context
3671
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3672
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3673
 *             allocate memory for the actual bitmap.
3674
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3675
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3676
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3677
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3678
 *
3679
 * @param[in] avpkt The input AVpacket containing the input buffer.
3680
 *            You can create such packet with av_init_packet() and by then setting
3681
 *            data and size, some decoders might in addition need other fields like
3682
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3683
 *            fields possible.
3684
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3685
 * @return On error a negative value is returned, otherwise the number of bytes
3686
 * used or zero if no frame could be decompressed.
3687
 */
3688
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3689
                         int *got_picture_ptr,
3690
                         AVPacket *avpkt);
3691

    
3692
/**
3693
 * Decode a subtitle message.
3694
 * Return a negative value on error, otherwise return the number of bytes used.
3695
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3696
 * Otherwise, the subtitle is stored in *sub.
3697
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3698
 * simplicity, because the performance difference is expect to be negligible
3699
 * and reusing a get_buffer written for video codecs would probably perform badly
3700
 * due to a potentially very different allocation pattern.
3701
 *
3702
 * @param avctx the codec context
3703
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3704
                   freed with avsubtitle_free if *got_sub_ptr is set.
3705
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3706
 * @param[in] avpkt The input AVPacket containing the input buffer.
3707
 */
3708
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3709
                            int *got_sub_ptr,
3710
                            AVPacket *avpkt);
3711

    
3712
/**
3713
 * Frees all allocated data in the given subtitle struct.
3714
 *
3715
 * @param sub AVSubtitle to free.
3716
 */
3717
void avsubtitle_free(AVSubtitle *sub);
3718

    
3719
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3720
                        int *data_size_ptr,
3721
                        uint8_t *buf, int buf_size);
3722

    
3723
/**
3724
 * Encode an audio frame from samples into buf.
3725
 *
3726
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3727
 * However, for PCM audio the user will know how much space is needed
3728
 * because it depends on the value passed in buf_size as described
3729
 * below. In that case a lower value can be used.
3730
 *
3731
 * @param avctx the codec context
3732
 * @param[out] buf the output buffer
3733
 * @param[in] buf_size the output buffer size
3734
 * @param[in] samples the input buffer containing the samples
3735
 * The number of samples read from this buffer is frame_size*channels,
3736
 * both of which are defined in avctx.
3737
 * For PCM audio the number of samples read from samples is equal to
3738
 * buf_size * input_sample_size / output_sample_size.
3739
 * @return On error a negative value is returned, on success zero or the number
3740
 * of bytes used to encode the data read from the input buffer.
3741
 */
3742
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3743
                         const short *samples);
3744

    
3745
/**
3746
 * Encode a video frame from pict into buf.
3747
 * The input picture should be
3748
 * stored using a specific format, namely avctx.pix_fmt.
3749
 *
3750
 * @param avctx the codec context
3751
 * @param[out] buf the output buffer for the bitstream of encoded frame
3752
 * @param[in] buf_size the size of the output buffer in bytes
3753
 * @param[in] pict the input picture to encode
3754
 * @return On error a negative value is returned, on success zero or the number
3755
 * of bytes used from the output buffer.
3756
 */
3757
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3758
                         const AVFrame *pict);
3759
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3760
                            const AVSubtitle *sub);
3761

    
3762
int avcodec_close(AVCodecContext *avctx);
3763

    
3764
/**
3765
 * Register all the codecs, parsers and bitstream filters which were enabled at
3766
 * configuration time. If you do not call this function you can select exactly
3767
 * which formats you want to support, by using the individual registration
3768
 * functions.
3769
 *
3770
 * @see avcodec_register
3771
 * @see av_register_codec_parser
3772
 * @see av_register_bitstream_filter
3773
 */
3774
void avcodec_register_all(void);
3775

    
3776
/**
3777
 * Flush buffers, should be called when seeking or when switching to a different stream.
3778
 */
3779
void avcodec_flush_buffers(AVCodecContext *avctx);
3780

    
3781
void avcodec_default_free_buffers(AVCodecContext *s);
3782

    
3783
/* misc useful functions */
3784

    
3785
/**
3786
 * Return a single letter to describe the given picture type pict_type.
3787
 *
3788
 * @param[in] pict_type the picture type
3789
 * @return A single character representing the picture type.
3790
 */
3791
char av_get_pict_type_char(int pict_type);
3792

    
3793
/**
3794
 * Return codec bits per sample.
3795
 *
3796
 * @param[in] codec_id the codec
3797
 * @return Number of bits per sample or zero if unknown for the given codec.
3798
 */
3799
int av_get_bits_per_sample(enum CodecID codec_id);
3800

    
3801
#if FF_API_OLD_SAMPLE_FMT
3802
/**
3803
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3804
 */
3805
attribute_deprecated
3806
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3807
#endif
3808

    
3809
/* frame parsing */
3810
typedef struct AVCodecParserContext {
3811
    void *priv_data;
3812
    struct AVCodecParser *parser;
3813
    int64_t frame_offset; /* offset of the current frame */
3814
    int64_t cur_offset; /* current offset
3815
                           (incremented by each av_parser_parse()) */
3816
    int64_t next_frame_offset; /* offset of the next frame */
3817
    /* video info */
3818
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3819
    /**
3820
     * This field is used for proper frame duration computation in lavf.
3821
     * It signals, how much longer the frame duration of the current frame
3822
     * is compared to normal frame duration.
3823
     *
3824
     * frame_duration = (1 + repeat_pict) * time_base
3825
     *
3826
     * It is used by codecs like H.264 to display telecined material.
3827
     */
3828
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3829
    int64_t pts;     /* pts of the current frame */
3830
    int64_t dts;     /* dts of the current frame */
3831

    
3832
    /* private data */
3833
    int64_t last_pts;
3834
    int64_t last_dts;
3835
    int fetch_timestamp;
3836

    
3837
#define AV_PARSER_PTS_NB 4
3838
    int cur_frame_start_index;
3839
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3840
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3841
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3842

    
3843
    int flags;
3844
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3845
#define PARSER_FLAG_ONCE                      0x0002
3846
/// Set if the parser has a valid file offset
3847
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3848

    
3849
    int64_t offset;      ///< byte offset from starting packet start
3850
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3851

    
3852
    /*!
3853
     * Set by parser to 1 for key frames and 0 for non-key frames.
3854
     * It is initialized to -1, so if the parser doesn't set this flag,
3855
     * old-style fallback using FF_I_TYPE picture type as key frames
3856
     * will be used.
3857
     */
3858
    int key_frame;
3859

    
3860
    /**
3861
     * Time difference in stream time base units from the pts of this
3862
     * packet to the point at which the output from the decoder has converged
3863
     * independent from the availability of previous frames. That is, the
3864
     * frames are virtually identical no matter if decoding started from
3865
     * the very first frame or from this keyframe.
3866
     * Is AV_NOPTS_VALUE if unknown.
3867
     * This field is not the display duration of the current frame.
3868
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3869
     * set.
3870
     *
3871
     * The purpose of this field is to allow seeking in streams that have no
3872
     * keyframes in the conventional sense. It corresponds to the
3873
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3874
     * essential for some types of subtitle streams to ensure that all
3875
     * subtitles are correctly displayed after seeking.
3876
     */
3877
    int64_t convergence_duration;
3878

    
3879
    // Timestamp generation support:
3880
    /**
3881
     * Synchronization point for start of timestamp generation.
3882
     *
3883
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3884
     * (default).
3885
     *
3886
     * For example, this corresponds to presence of H.264 buffering period
3887
     * SEI message.
3888
     */
3889
    int dts_sync_point;
3890

    
3891
    /**
3892
     * Offset of the current timestamp against last timestamp sync point in
3893
     * units of AVCodecContext.time_base.
3894
     *
3895
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3896
     * contain a valid timestamp offset.
3897
     *
3898
     * Note that the timestamp of sync point has usually a nonzero
3899
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3900
     * the next frame after timestamp sync point will be usually 1.
3901
     *
3902
     * For example, this corresponds to H.264 cpb_removal_delay.
3903
     */
3904
    int dts_ref_dts_delta;
3905

    
3906
    /**
3907
     * Presentation delay of current frame in units of AVCodecContext.time_base.
3908
     *
3909
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3910
     * contain valid non-negative timestamp delta (presentation time of a frame
3911
     * must not lie in the past).
3912
     *
3913
     * This delay represents the difference between decoding and presentation
3914
     * time of the frame.
3915
     *
3916
     * For example, this corresponds to H.264 dpb_output_delay.
3917
     */
3918
    int pts_dts_delta;
3919

    
3920
    /**
3921
     * Position of the packet in file.
3922
     *
3923
     * Analogous to cur_frame_pts/dts
3924
     */
3925
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3926

    
3927
    /**
3928
     * Byte position of currently parsed frame in stream.
3929
     */
3930
    int64_t pos;
3931

    
3932
    /**
3933
     * Previous frame byte position.
3934
     */
3935
    int64_t last_pos;
3936
} AVCodecParserContext;
3937

    
3938
typedef struct AVCodecParser {
3939
    int codec_ids[5]; /* several codec IDs are permitted */
3940
    int priv_data_size;
3941
    int (*parser_init)(AVCodecParserContext *s);
3942
    int (*parser_parse)(AVCodecParserContext *s,
3943
                        AVCodecContext *avctx,
3944
                        const uint8_t **poutbuf, int *poutbuf_size,
3945
                        const uint8_t *buf, int buf_size);
3946
    void (*parser_close)(AVCodecParserContext *s);
3947
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3948
    struct AVCodecParser *next;
3949
} AVCodecParser;
3950

    
3951
AVCodecParser *av_parser_next(AVCodecParser *c);
3952

    
3953
void av_register_codec_parser(AVCodecParser *parser);
3954
AVCodecParserContext *av_parser_init(int codec_id);
3955

    
3956
/**
3957
 * Parse a packet.
3958
 *
3959
 * @param s             parser context.
3960
 * @param avctx         codec context.
3961
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
3962
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
3963
 * @param buf           input buffer.
3964
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
3965
 * @param pts           input presentation timestamp.
3966
 * @param dts           input decoding timestamp.
3967
 * @param pos           input byte position in stream.
3968
 * @return the number of bytes of the input bitstream used.
3969
 *
3970
 * Example:
3971
 * @code
3972
 *   while(in_len){
3973
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3974
 *                                        in_data, in_len,
3975
 *                                        pts, dts, pos);
3976
 *       in_data += len;
3977
 *       in_len  -= len;
3978
 *
3979
 *       if(size)
3980
 *          decode_frame(data, size);
3981
 *   }
3982
 * @endcode
3983
 */
3984
int av_parser_parse2(AVCodecParserContext *s,
3985
                     AVCodecContext *avctx,
3986
                     uint8_t **poutbuf, int *poutbuf_size,
3987
                     const uint8_t *buf, int buf_size,
3988
                     int64_t pts, int64_t dts,
3989
                     int64_t pos);
3990

    
3991
int av_parser_change(AVCodecParserContext *s,
3992
                     AVCodecContext *avctx,
3993
                     uint8_t **poutbuf, int *poutbuf_size,
3994
                     const uint8_t *buf, int buf_size, int keyframe);
3995
void av_parser_close(AVCodecParserContext *s);
3996

    
3997

    
3998
typedef struct AVBitStreamFilterContext {
3999
    void *priv_data;
4000
    struct AVBitStreamFilter *filter;
4001
    AVCodecParserContext *parser;
4002
    struct AVBitStreamFilterContext *next;
4003
} AVBitStreamFilterContext;
4004

    
4005

    
4006
typedef struct AVBitStreamFilter {
4007
    const char *name;
4008
    int priv_data_size;
4009
    int (*filter)(AVBitStreamFilterContext *bsfc,
4010
                  AVCodecContext *avctx, const char *args,
4011
                  uint8_t **poutbuf, int *poutbuf_size,
4012
                  const uint8_t *buf, int buf_size, int keyframe);
4013
    void (*close)(AVBitStreamFilterContext *bsfc);
4014
    struct AVBitStreamFilter *next;
4015
} AVBitStreamFilter;
4016

    
4017
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4018
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4019
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4020
                               AVCodecContext *avctx, const char *args,
4021
                               uint8_t **poutbuf, int *poutbuf_size,
4022
                               const uint8_t *buf, int buf_size, int keyframe);
4023
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4024

    
4025
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4026

    
4027
/* memory */
4028

    
4029
/**
4030
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4031
 *
4032
 * @see av_realloc
4033
 */
4034
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
4035

    
4036
/**
4037
 * Allocate a buffer, reusing the given one if large enough.
4038
 *
4039
 * Contrary to av_fast_realloc the current buffer contents might not be
4040
 * preserved and on error the old buffer is freed, thus no special
4041
 * handling to avoid memleaks is necessary.
4042
 *
4043
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4044
 * @param size size of the buffer *ptr points to
4045
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4046
 *                 *size 0 if an error occurred.
4047
 */
4048
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
4049

    
4050
/**
4051
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4052
 */
4053
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4054
                     enum PixelFormat pix_fmt, int width, int height);
4055

    
4056
/**
4057
 * Crop image top and left side.
4058
 */
4059
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4060
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4061

    
4062
/**
4063
 * Pad image.
4064
 */
4065
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4066
            int padtop, int padbottom, int padleft, int padright, int *color);
4067

    
4068
/**
4069
 * Encode extradata length to a buffer. Used by xiph codecs.
4070
 *
4071
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4072
 * @param v size of extradata in bytes
4073
 * @return number of bytes written to the buffer.
4074
 */
4075
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4076

    
4077
/**
4078
 * Logs a generic warning message about a missing feature. This function is
4079
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4080
 * only, and would normally not be used by applications.
4081
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4082
 * a pointer to an AVClass struct
4083
 * @param[in] feature string containing the name of the missing feature
4084
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4085
 * If want_sample is non-zero, additional verbage will be added to the log
4086
 * message which tells the user how to report samples to the development
4087
 * mailing list.
4088
 */
4089
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4090

    
4091
/**
4092
 * Log a generic warning message asking for a sample. This function is
4093
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4094
 * only, and would normally not be used by applications.
4095
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4096
 * a pointer to an AVClass struct
4097
 * @param[in] msg string containing an optional message, or NULL if no message
4098
 */
4099
void av_log_ask_for_sample(void *avc, const char *msg, ...);
4100

    
4101
/**
4102
 * Register the hardware accelerator hwaccel.
4103
 */
4104
void av_register_hwaccel(AVHWAccel *hwaccel);
4105

    
4106
/**
4107
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4108
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4109
 * after hwaccel, or NULL if hwaccel is the last one.
4110
 */
4111
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4112

    
4113

    
4114
/**
4115
 * Lock operation used by lockmgr
4116
 */
4117
enum AVLockOp {
4118
  AV_LOCK_CREATE,  ///< Create a mutex
4119
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4120
  AV_LOCK_RELEASE, ///< Unlock the mutex
4121
  AV_LOCK_DESTROY, ///< Free mutex resources
4122
};
4123

    
4124
/**
4125
 * Register a user provided lock manager supporting the operations
4126
 * specified by AVLockOp. mutex points to a (void *) where the
4127
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4128
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4129
 *
4130
 * @param cb User defined callback. Note: Libav may invoke calls to this
4131
 *           callback during the call to av_lockmgr_register().
4132
 *           Thus, the application must be prepared to handle that.
4133
 *           If cb is set to NULL the lockmgr will be unregistered.
4134
 *           Also note that during unregistration the previously registered
4135
 *           lockmgr callback may also be invoked.
4136
 */
4137
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4138

    
4139
#endif /* AVCODEC_AVCODEC_H */