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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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 * @file
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 * external API header
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 */
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#include <errno.h>
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#include "libavutil/samplefmt.h"
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#include "libavutil/avutil.h"
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#include "libavutil/cpu.h"
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#include "libavcodec/version.h"
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#   define FF_INTERNALC_MEM_TYPE unsigned int
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#else
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#   define FF_INTERNALC_MEM_TYPE size_t
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#endif
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/**
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 * Identify the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. it is as close as possible to similar codecs.
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 */
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enum CodecID {
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    CODEC_ID_NONE,
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    /* video codecs */
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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    CODEC_ID_MPEG2VIDEO_XVMC,
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    CODEC_ID_H261,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_RV20,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MJPEGB,
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    CODEC_ID_LJPEG,
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    CODEC_ID_SP5X,
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    CODEC_ID_JPEGLS,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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    CODEC_ID_WMV2,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    CODEC_ID_FLV1,
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    CODEC_ID_SVQ1,
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    CODEC_ID_SVQ3,
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    CODEC_ID_DVVIDEO,
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    CODEC_ID_HUFFYUV,
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    CODEC_ID_CYUV,
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    CODEC_ID_H264,
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    CODEC_ID_INDEO3,
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    CODEC_ID_VP3,
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    CODEC_ID_THEORA,
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    CODEC_ID_ASV1,
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    CODEC_ID_ASV2,
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    CODEC_ID_FFV1,
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    CODEC_ID_4XM,
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    CODEC_ID_VCR1,
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    CODEC_ID_CLJR,
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    CODEC_ID_MDEC,
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    CODEC_ID_ROQ,
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    CODEC_ID_INTERPLAY_VIDEO,
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    CODEC_ID_XAN_WC3,
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    CODEC_ID_XAN_WC4,
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    CODEC_ID_RPZA,
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    CODEC_ID_CINEPAK,
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    CODEC_ID_WS_VQA,
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    CODEC_ID_MSRLE,
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    CODEC_ID_MSVIDEO1,
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    CODEC_ID_IDCIN,
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    CODEC_ID_8BPS,
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    CODEC_ID_SMC,
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    CODEC_ID_FLIC,
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    CODEC_ID_TRUEMOTION1,
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    CODEC_ID_VMDVIDEO,
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    CODEC_ID_MSZH,
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    CODEC_ID_ZLIB,
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    CODEC_ID_QTRLE,
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    CODEC_ID_SNOW,
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    CODEC_ID_TSCC,
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    CODEC_ID_ULTI,
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    CODEC_ID_QDRAW,
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    CODEC_ID_VIXL,
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    CODEC_ID_QPEG,
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#if LIBAVCODEC_VERSION_MAJOR < 53
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    CODEC_ID_XVID,
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#endif
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    CODEC_ID_PNG,
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    CODEC_ID_PPM,
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    CODEC_ID_PBM,
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    CODEC_ID_PGM,
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    CODEC_ID_PGMYUV,
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    CODEC_ID_PAM,
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    CODEC_ID_FFVHUFF,
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    CODEC_ID_RV30,
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    CODEC_ID_RV40,
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    CODEC_ID_VC1,
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    CODEC_ID_WMV3,
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    CODEC_ID_LOCO,
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    CODEC_ID_WNV1,
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    CODEC_ID_AASC,
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    CODEC_ID_INDEO2,
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    CODEC_ID_FRAPS,
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    CODEC_ID_TRUEMOTION2,
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    CODEC_ID_BMP,
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    CODEC_ID_CSCD,
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    CODEC_ID_MMVIDEO,
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    CODEC_ID_ZMBV,
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    CODEC_ID_AVS,
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    CODEC_ID_SMACKVIDEO,
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    CODEC_ID_NUV,
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    CODEC_ID_KMVC,
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    CODEC_ID_FLASHSV,
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    CODEC_ID_CAVS,
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    CODEC_ID_JPEG2000,
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    CODEC_ID_VMNC,
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    CODEC_ID_VP5,
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    CODEC_ID_VP6,
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    CODEC_ID_VP6F,
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    CODEC_ID_TARGA,
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    CODEC_ID_DSICINVIDEO,
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    CODEC_ID_TIERTEXSEQVIDEO,
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    CODEC_ID_TIFF,
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    CODEC_ID_GIF,
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    CODEC_ID_FFH264,
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    CODEC_ID_DXA,
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    CODEC_ID_DNXHD,
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    CODEC_ID_THP,
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    CODEC_ID_SGI,
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    CODEC_ID_C93,
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    CODEC_ID_BETHSOFTVID,
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    CODEC_ID_PTX,
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    CODEC_ID_TXD,
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    CODEC_ID_VP6A,
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    CODEC_ID_AMV,
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    CODEC_ID_VB,
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    CODEC_ID_PCX,
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    CODEC_ID_SUNRAST,
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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    CODEC_ID_RL2,
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    CODEC_ID_8SVX_EXP,
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    CODEC_ID_8SVX_FIB,
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    CODEC_ID_ESCAPE124,
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    CODEC_ID_DIRAC,
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    CODEC_ID_BFI,
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    CODEC_ID_CMV,
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    CODEC_ID_MOTIONPIXELS,
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    CODEC_ID_TGV,
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    CODEC_ID_TGQ,
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    CODEC_ID_TQI,
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    CODEC_ID_AURA,
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    CODEC_ID_AURA2,
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    CODEC_ID_V210X,
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    CODEC_ID_TMV,
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    CODEC_ID_V210,
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    CODEC_ID_DPX,
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    CODEC_ID_MAD,
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    CODEC_ID_FRWU,
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    CODEC_ID_FLASHSV2,
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    CODEC_ID_CDGRAPHICS,
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    CODEC_ID_R210,
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    CODEC_ID_ANM,
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    CODEC_ID_BINKVIDEO,
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    CODEC_ID_IFF_ILBM,
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    CODEC_ID_IFF_BYTERUN1,
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    CODEC_ID_KGV1,
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    CODEC_ID_YOP,
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    CODEC_ID_VP8,
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    CODEC_ID_PICTOR,
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    CODEC_ID_ANSI,
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    CODEC_ID_A64_MULTI,
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    CODEC_ID_A64_MULTI5,
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    CODEC_ID_R10K,
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    CODEC_ID_MXPEG,
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    CODEC_ID_LAGARITH,
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    CODEC_ID_PRORES,
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    CODEC_ID_JV,
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    CODEC_ID_DFA,
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    /* various PCM "codecs" */
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    CODEC_ID_PCM_S16LE= 0x10000,
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    CODEC_ID_PCM_S16BE,
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    CODEC_ID_PCM_U16LE,
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    CODEC_ID_PCM_U16BE,
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    CODEC_ID_PCM_S8,
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    CODEC_ID_PCM_U8,
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    CODEC_ID_PCM_MULAW,
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    CODEC_ID_PCM_ALAW,
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    CODEC_ID_PCM_S32LE,
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    CODEC_ID_PCM_S32BE,
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    CODEC_ID_PCM_U32LE,
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    CODEC_ID_PCM_U32BE,
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    CODEC_ID_PCM_S24LE,
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    CODEC_ID_PCM_S24BE,
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    CODEC_ID_PCM_U24LE,
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    CODEC_ID_PCM_U24BE,
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    CODEC_ID_PCM_S24DAUD,
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    CODEC_ID_PCM_ZORK,
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    CODEC_ID_PCM_S16LE_PLANAR,
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    CODEC_ID_PCM_DVD,
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    CODEC_ID_PCM_F32BE,
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    CODEC_ID_PCM_F32LE,
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    CODEC_ID_PCM_F64BE,
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    CODEC_ID_PCM_F64LE,
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    CODEC_ID_PCM_BLURAY,
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    CODEC_ID_PCM_LXF,
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    /* various ADPCM codecs */
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    CODEC_ID_ADPCM_IMA_QT= 0x11000,
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    CODEC_ID_ADPCM_IMA_WAV,
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    CODEC_ID_ADPCM_IMA_DK3,
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    CODEC_ID_ADPCM_IMA_DK4,
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    CODEC_ID_ADPCM_IMA_WS,
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    CODEC_ID_ADPCM_IMA_SMJPEG,
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    CODEC_ID_ADPCM_MS,
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    CODEC_ID_ADPCM_4XM,
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    CODEC_ID_ADPCM_XA,
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    CODEC_ID_ADPCM_ADX,
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    CODEC_ID_ADPCM_EA,
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    CODEC_ID_ADPCM_G726,
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    CODEC_ID_ADPCM_CT,
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    CODEC_ID_ADPCM_SWF,
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    CODEC_ID_ADPCM_YAMAHA,
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    CODEC_ID_ADPCM_SBPRO_4,
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    CODEC_ID_ADPCM_SBPRO_3,
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    CODEC_ID_ADPCM_SBPRO_2,
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    CODEC_ID_ADPCM_THP,
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    CODEC_ID_ADPCM_IMA_AMV,
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    CODEC_ID_ADPCM_EA_R1,
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    CODEC_ID_ADPCM_EA_R3,
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    CODEC_ID_ADPCM_EA_R2,
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    CODEC_ID_ADPCM_IMA_EA_SEAD,
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    CODEC_ID_ADPCM_IMA_EA_EACS,
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    CODEC_ID_ADPCM_EA_XAS,
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    CODEC_ID_ADPCM_EA_MAXIS_XA,
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    CODEC_ID_ADPCM_IMA_ISS,
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    CODEC_ID_ADPCM_G722,
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    /* AMR */
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    CODEC_ID_AMR_NB= 0x12000,
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    CODEC_ID_AMR_WB,
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    /* RealAudio codecs*/
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    CODEC_ID_RA_144= 0x13000,
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    CODEC_ID_RA_288,
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    /* various DPCM codecs */
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    CODEC_ID_ROQ_DPCM= 0x14000,
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    CODEC_ID_INTERPLAY_DPCM,
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    CODEC_ID_XAN_DPCM,
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    CODEC_ID_SOL_DPCM,
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    /* audio codecs */
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    CODEC_ID_MP2= 0x15000,
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    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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    CODEC_ID_AAC,
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    CODEC_ID_AC3,
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    CODEC_ID_DTS,
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    CODEC_ID_VORBIS,
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    CODEC_ID_DVAUDIO,
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    CODEC_ID_WMAV1,
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    CODEC_ID_WMAV2,
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    CODEC_ID_MACE3,
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    CODEC_ID_MACE6,
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    CODEC_ID_VMDAUDIO,
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    CODEC_ID_SONIC,
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    CODEC_ID_SONIC_LS,
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    CODEC_ID_FLAC,
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    CODEC_ID_MP3ADU,
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    CODEC_ID_MP3ON4,
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    CODEC_ID_SHORTEN,
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    CODEC_ID_ALAC,
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    CODEC_ID_WESTWOOD_SND1,
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    CODEC_ID_GSM, ///< as in Berlin toast format
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    CODEC_ID_QDM2,
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    CODEC_ID_COOK,
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    CODEC_ID_TRUESPEECH,
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    CODEC_ID_TTA,
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    CODEC_ID_SMACKAUDIO,
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    CODEC_ID_QCELP,
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    CODEC_ID_WAVPACK,
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    CODEC_ID_DSICINAUDIO,
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    CODEC_ID_IMC,
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    CODEC_ID_MUSEPACK7,
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    CODEC_ID_MLP,
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    CODEC_ID_GSM_MS, /* as found in WAV */
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    CODEC_ID_ATRAC3,
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    CODEC_ID_VOXWARE,
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    CODEC_ID_APE,
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    CODEC_ID_NELLYMOSER,
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    CODEC_ID_MUSEPACK8,
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    CODEC_ID_SPEEX,
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    CODEC_ID_WMAVOICE,
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    CODEC_ID_WMAPRO,
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    CODEC_ID_WMALOSSLESS,
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    CODEC_ID_ATRAC3P,
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    CODEC_ID_EAC3,
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    CODEC_ID_SIPR,
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    CODEC_ID_MP1,
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    CODEC_ID_TWINVQ,
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    CODEC_ID_TRUEHD,
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    CODEC_ID_MP4ALS,
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    CODEC_ID_ATRAC1,
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    CODEC_ID_BINKAUDIO_RDFT,
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    CODEC_ID_BINKAUDIO_DCT,
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    CODEC_ID_AAC_LATM,
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    CODEC_ID_QDMC,
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    /* subtitle codecs */
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    CODEC_ID_DVD_SUBTITLE= 0x17000,
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    CODEC_ID_DVB_SUBTITLE,
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    CODEC_ID_TEXT,  ///< raw UTF-8 text
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    CODEC_ID_XSUB,
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    CODEC_ID_SSA,
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    CODEC_ID_MOV_TEXT,
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    CODEC_ID_HDMV_PGS_SUBTITLE,
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    CODEC_ID_DVB_TELETEXT,
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    CODEC_ID_SRT,
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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
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    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
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                                * stream (only used by libavformat) */
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    CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing only metadata information.
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};
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#define CodecType AVMediaType
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#define CODEC_TYPE_UNKNOWN    AVMEDIA_TYPE_UNKNOWN
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#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
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#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
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#define CODEC_TYPE_DATA       AVMEDIA_TYPE_DATA
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#define CODEC_TYPE_SUBTITLE   AVMEDIA_TYPE_SUBTITLE
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#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
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#define CODEC_TYPE_NB         AVMEDIA_TYPE_NB
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#endif
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#if FF_API_OLD_SAMPLE_FMT
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#define SampleFormat AVSampleFormat
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#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
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#define SAMPLE_FMT_U8   AV_SAMPLE_FMT_U8
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#define SAMPLE_FMT_S16  AV_SAMPLE_FMT_S16
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#define SAMPLE_FMT_S32  AV_SAMPLE_FMT_S32
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#define SAMPLE_FMT_FLT  AV_SAMPLE_FMT_FLT
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#define SAMPLE_FMT_DBL  AV_SAMPLE_FMT_DBL
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#define SAMPLE_FMT_NB   AV_SAMPLE_FMT_NB
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#endif
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#if FF_API_OLD_AUDIOCONVERT
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#include "libavutil/audioconvert.h"
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/* Audio channel masks */
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#define CH_FRONT_LEFT            AV_CH_FRONT_LEFT
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#define CH_FRONT_RIGHT           AV_CH_FRONT_RIGHT
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#define CH_FRONT_CENTER          AV_CH_FRONT_CENTER
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#define CH_LOW_FREQUENCY         AV_CH_LOW_FREQUENCY
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#define CH_BACK_LEFT             AV_CH_BACK_LEFT
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#define CH_BACK_RIGHT            AV_CH_BACK_RIGHT
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#define CH_FRONT_LEFT_OF_CENTER  AV_CH_FRONT_LEFT_OF_CENTER
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#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
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#define CH_BACK_CENTER           AV_CH_BACK_CENTER
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#define CH_SIDE_LEFT             AV_CH_SIDE_LEFT
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#define CH_SIDE_RIGHT            AV_CH_SIDE_RIGHT
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#define CH_TOP_CENTER            AV_CH_TOP_CENTER
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#define CH_TOP_FRONT_LEFT        AV_CH_TOP_FRONT_LEFT
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#define CH_TOP_FRONT_CENTER      AV_CH_TOP_FRONT_CENTER
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#define CH_TOP_FRONT_RIGHT       AV_CH_TOP_FRONT_RIGHT
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#define CH_TOP_BACK_LEFT         AV_CH_TOP_BACK_LEFT
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#define CH_TOP_BACK_CENTER       AV_CH_TOP_BACK_CENTER
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#define CH_TOP_BACK_RIGHT        AV_CH_TOP_BACK_RIGHT
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#define CH_STEREO_LEFT           AV_CH_STEREO_LEFT
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#define CH_STEREO_RIGHT          AV_CH_STEREO_RIGHT
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/** Channel mask value used for AVCodecContext.request_channel_layout
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    to indicate that the user requests the channel order of the decoder output
418
    to be the native codec channel order. */
419
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
422
#define CH_LAYOUT_MONO           AV_CH_LAYOUT_MONO
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#define CH_LAYOUT_STEREO         AV_CH_LAYOUT_STEREO
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#define CH_LAYOUT_2_1            AV_CH_LAYOUT_2_1
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#define CH_LAYOUT_SURROUND       AV_CH_LAYOUT_SURROUND
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#define CH_LAYOUT_4POINT0        AV_CH_LAYOUT_4POINT0
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#define CH_LAYOUT_2_2            AV_CH_LAYOUT_2_2
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#define CH_LAYOUT_QUAD           AV_CH_LAYOUT_QUAD
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#define CH_LAYOUT_5POINT0        AV_CH_LAYOUT_5POINT0
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#define CH_LAYOUT_5POINT1        AV_CH_LAYOUT_5POINT1
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#define CH_LAYOUT_5POINT0_BACK   AV_CH_LAYOUT_5POINT0_BACK
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#define CH_LAYOUT_5POINT1_BACK   AV_CH_LAYOUT_5POINT1_BACK
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#define CH_LAYOUT_7POINT0        AV_CH_LAYOUT_7POINT0
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#define CH_LAYOUT_7POINT1        AV_CH_LAYOUT_7POINT1
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#define CH_LAYOUT_7POINT1_WIDE   AV_CH_LAYOUT_7POINT1_WIDE
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#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
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#endif
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/* in bytes */
440
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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442
/**
443
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
444
 * This is mainly needed because some optimized bitstream readers read
445
 * 32 or 64 bit at once and could read over the end.<br>
446
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
447
 * MPEG bitstreams could cause overread and segfault.
448
 */
449
#define FF_INPUT_BUFFER_PADDING_SIZE 8
450

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

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

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

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

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

    
504
enum AVColorSpace{
505
    AVCOL_SPC_RGB        =0,
506
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
507
    AVCOL_SPC_UNSPECIFIED=2,
508
    AVCOL_SPC_FCC        =4,
509
    AVCOL_SPC_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
510
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
511
    AVCOL_SPC_SMPTE240M  =7,
512
    AVCOL_SPC_NB           , ///< Not part of ABI
513
};
514

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

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

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

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

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

    
570
#define FF_MAX_B_FRAMES 16
571

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

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

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

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

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

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

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

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

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

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

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

    
1024

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

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

    
1038
enum AVPacketSideDataType {
1039
    AV_PKT_DATA_PALETTE,
1040
};
1041

    
1042
typedef struct AVPacket {
1043
    /**
1044
     * Presentation timestamp in AVStream->time_base units; the time at which
1045
     * the decompressed packet will be presented to the user.
1046
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1047
     * pts MUST be larger or equal to dts as presentation cannot happen before
1048
     * decompression, unless one wants to view hex dumps. Some formats misuse
1049
     * the terms dts and pts/cts to mean something different. Such timestamps
1050
     * must be converted to true pts/dts before they are stored in AVPacket.
1051
     */
1052
    int64_t pts;
1053
    /**
1054
     * Decompression timestamp in AVStream->time_base units; the time at which
1055
     * the packet is decompressed.
1056
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1057
     */
1058
    int64_t dts;
1059
    uint8_t *data;
1060
    int   size;
1061
    int   stream_index;
1062
    int   flags;
1063
    /**
1064
     * Additional packet data that can be provided by the container.
1065
     * Packet can contain several types of side information.
1066
     */
1067
    struct {
1068
        uint8_t *data;
1069
        int      size;
1070
        enum AVPacketSideDataType type;
1071
    } *side_data;
1072
    int side_data_elems;
1073

    
1074
    /**
1075
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1076
     * Equals next_pts - this_pts in presentation order.
1077
     */
1078
    int   duration;
1079
    void  (*destruct)(struct AVPacket *);
1080
    void  *priv;
1081
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1082

    
1083
    /**
1084
     * Time difference in AVStream->time_base units from the pts of this
1085
     * packet to the point at which the output from the decoder has converged
1086
     * independent from the availability of previous frames. That is, the
1087
     * frames are virtually identical no matter if decoding started from
1088
     * the very first frame or from this keyframe.
1089
     * Is AV_NOPTS_VALUE if unknown.
1090
     * This field is not the display duration of the current packet.
1091
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1092
     * set.
1093
     *
1094
     * The purpose of this field is to allow seeking in streams that have no
1095
     * keyframes in the conventional sense. It corresponds to the
1096
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1097
     * essential for some types of subtitle streams to ensure that all
1098
     * subtitles are correctly displayed after seeking.
1099
     */
1100
    int64_t convergence_duration;
1101
} AVPacket;
1102
#define AV_PKT_FLAG_KEY   0x0001
1103
#if LIBAVCODEC_VERSION_MAJOR < 53
1104
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1105
#endif
1106

    
1107
/**
1108
 * Audio Video Frame.
1109
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1110
 * bumps.
1111
 * Removal, reordering and changes to existing fields require a major
1112
 * version bump. No fields should be added into AVFrame before or after
1113
 * FF_COMMON_FRAME!
1114
 * sizeof(AVFrame) must not be used outside libav*.
1115
 */
1116
typedef struct AVFrame {
1117
    FF_COMMON_FRAME
1118
} AVFrame;
1119

    
1120
/**
1121
 * main external API structure.
1122
 * New fields can be added to the end with minor version bumps.
1123
 * Removal, reordering and changes to existing fields require a major
1124
 * version bump.
1125
 * sizeof(AVCodecContext) must not be used outside libav*.
1126
 */
1127
typedef struct AVCodecContext {
1128
    /**
1129
     * information on struct for av_log
1130
     * - set by avcodec_alloc_context
1131
     */
1132
    const AVClass *av_class;
1133
    /**
1134
     * the average bitrate
1135
     * - encoding: Set by user; unused for constant quantizer encoding.
1136
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1137
     */
1138
    int bit_rate;
1139

    
1140
    /**
1141
     * number of bits the bitstream is allowed to diverge from the reference.
1142
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1143
     * - encoding: Set by user; unused for constant quantizer encoding.
1144
     * - decoding: unused
1145
     */
1146
    int bit_rate_tolerance;
1147

    
1148
    /**
1149
     * CODEC_FLAG_*.
1150
     * - encoding: Set by user.
1151
     * - decoding: Set by user.
1152
     */
1153
    int flags;
1154

    
1155
    /**
1156
     * Some codecs need additional format info. It is stored here.
1157
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1158
     * specific codec MUST set it correctly otherwise stream copy breaks.
1159
     * In general use of this field by muxers is not recommanded.
1160
     * - encoding: Set by libavcodec.
1161
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1162
     */
1163
    int sub_id;
1164

    
1165
    /**
1166
     * Motion estimation algorithm used for video coding.
1167
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1168
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1169
     * - encoding: MUST be set by user.
1170
     * - decoding: unused
1171
     */
1172
    int me_method;
1173

    
1174
    /**
1175
     * some codecs need / can use extradata like Huffman tables.
1176
     * mjpeg: Huffman tables
1177
     * rv10: additional flags
1178
     * mpeg4: global headers (they can be in the bitstream or here)
1179
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1180
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1181
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1182
     * - encoding: Set/allocated/freed by libavcodec.
1183
     * - decoding: Set/allocated/freed by user.
1184
     */
1185
    uint8_t *extradata;
1186
    int extradata_size;
1187

    
1188
    /**
1189
     * This is the fundamental unit of time (in seconds) in terms
1190
     * of which frame timestamps are represented. For fixed-fps content,
1191
     * timebase should be 1/framerate and timestamp increments should be
1192
     * identically 1.
1193
     * - encoding: MUST be set by user.
1194
     * - decoding: Set by libavcodec.
1195
     */
1196
    AVRational time_base;
1197

    
1198
    /* video only */
1199
    /**
1200
     * picture width / height.
1201
     * - encoding: MUST be set by user.
1202
     * - decoding: Set by libavcodec.
1203
     * Note: For compatibility it is possible to set this instead of
1204
     * coded_width/height before decoding.
1205
     */
1206
    int width, height;
1207

    
1208
#define FF_ASPECT_EXTENDED 15
1209

    
1210
    /**
1211
     * the number of pictures in a group of pictures, or 0 for intra_only
1212
     * - encoding: Set by user.
1213
     * - decoding: unused
1214
     */
1215
    int gop_size;
1216

    
1217
    /**
1218
     * Pixel format, see PIX_FMT_xxx.
1219
     * May be set by the demuxer if known from headers.
1220
     * May be overriden by the decoder if it knows better.
1221
     * - encoding: Set by user.
1222
     * - decoding: Set by user if known, overridden by libavcodec if known
1223
     */
1224
    enum PixelFormat pix_fmt;
1225

    
1226
#if FF_API_RATE_EMU
1227
    /**
1228
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1229
     * has to read frames at native frame rate.
1230
     * - encoding: Set by user.
1231
     * - decoding: unused
1232
     */
1233
    attribute_deprecated int rate_emu;
1234
#endif
1235

    
1236
    /**
1237
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1238
     * decoder to draw a horizontal band. It improves cache usage. Not
1239
     * all codecs can do that. You must check the codec capabilities
1240
     * beforehand.
1241
     * When multithreading is used, it may be called from multiple threads
1242
     * at the same time; threads might draw different parts of the same AVFrame,
1243
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1244
     * in order.
1245
     * The function is also used by hardware acceleration APIs.
1246
     * It is called at least once during frame decoding to pass
1247
     * the data needed for hardware render.
1248
     * In that mode instead of pixel data, AVFrame points to
1249
     * a structure specific to the acceleration API. The application
1250
     * reads the structure and can change some fields to indicate progress
1251
     * or mark state.
1252
     * - encoding: unused
1253
     * - decoding: Set by user.
1254
     * @param height the height of the slice
1255
     * @param y the y position of the slice
1256
     * @param type 1->top field, 2->bottom field, 3->frame
1257
     * @param offset offset into the AVFrame.data from which the slice should be read
1258
     */
1259
    void (*draw_horiz_band)(struct AVCodecContext *s,
1260
                            const AVFrame *src, int offset[4],
1261
                            int y, int type, int height);
1262

    
1263
    /* audio only */
1264
    int sample_rate; ///< samples per second
1265
    int channels;    ///< number of audio channels
1266

    
1267
    /**
1268
     * audio sample format
1269
     * - encoding: Set by user.
1270
     * - decoding: Set by libavcodec.
1271
     */
1272
    enum AVSampleFormat sample_fmt;  ///< sample format
1273

    
1274
    /* The following data should not be initialized. */
1275
    /**
1276
     * Samples per packet, initialized when calling 'init'.
1277
     */
1278
    int frame_size;
1279
    int frame_number;   ///< audio or video frame number
1280
#if LIBAVCODEC_VERSION_MAJOR < 53
1281
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1282
#endif
1283

    
1284
    /**
1285
     * Number of frames the decoded output will be delayed relative to
1286
     * the encoded input.
1287
     * - encoding: Set by libavcodec.
1288
     * - decoding: unused
1289
     */
1290
    int delay;
1291

    
1292
    /* - encoding parameters */
1293
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1294
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1295

    
1296
    /**
1297
     * minimum quantizer
1298
     * - encoding: Set by user.
1299
     * - decoding: unused
1300
     */
1301
    int qmin;
1302

    
1303
    /**
1304
     * maximum quantizer
1305
     * - encoding: Set by user.
1306
     * - decoding: unused
1307
     */
1308
    int qmax;
1309

    
1310
    /**
1311
     * maximum quantizer difference between frames
1312
     * - encoding: Set by user.
1313
     * - decoding: unused
1314
     */
1315
    int max_qdiff;
1316

    
1317
    /**
1318
     * maximum number of B-frames between non-B-frames
1319
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1320
     * - encoding: Set by user.
1321
     * - decoding: unused
1322
     */
1323
    int max_b_frames;
1324

    
1325
    /**
1326
     * qscale factor between IP and B-frames
1327
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1328
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1329
     * - encoding: Set by user.
1330
     * - decoding: unused
1331
     */
1332
    float b_quant_factor;
1333

    
1334
    /** obsolete FIXME remove */
1335
    int rc_strategy;
1336
#define FF_RC_STRATEGY_XVID 1
1337

    
1338
    int b_frame_strategy;
1339

    
1340
#if FF_API_HURRY_UP
1341
    /**
1342
     * hurry up amount
1343
     * - encoding: unused
1344
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1345
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1346
     */
1347
    attribute_deprecated int hurry_up;
1348
#endif
1349

    
1350
    struct AVCodec *codec;
1351

    
1352
    void *priv_data;
1353

    
1354
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1355
                            /* do its best to deliver a chunk with size     */
1356
                            /* below rtp_payload_size, the chunk will start */
1357
                            /* with a start code on some codecs like H.263. */
1358
                            /* This doesn't take account of any particular  */
1359
                            /* headers inside the transmitted RTP payload.  */
1360

    
1361

    
1362
    /* The RTP callback: This function is called    */
1363
    /* every time the encoder has a packet to send. */
1364
    /* It depends on the encoder if the data starts */
1365
    /* with a Start Code (it should). H.263 does.   */
1366
    /* mb_nb contains the number of macroblocks     */
1367
    /* encoded in the RTP payload.                  */
1368
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1369

    
1370
    /* statistics, used for 2-pass encoding */
1371
    int mv_bits;
1372
    int header_bits;
1373
    int i_tex_bits;
1374
    int p_tex_bits;
1375
    int i_count;
1376
    int p_count;
1377
    int skip_count;
1378
    int misc_bits;
1379

    
1380
    /**
1381
     * number of bits used for the previously encoded frame
1382
     * - encoding: Set by libavcodec.
1383
     * - decoding: unused
1384
     */
1385
    int frame_bits;
1386

    
1387
    /**
1388
     * Private data of the user, can be used to carry app specific stuff.
1389
     * - encoding: Set by user.
1390
     * - decoding: Set by user.
1391
     */
1392
    void *opaque;
1393

    
1394
    char codec_name[32];
1395
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1396
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1397

    
1398
    /**
1399
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1400
     * This is used to work around some encoder bugs.
1401
     * A demuxer should set this to what is stored in the field used to identify the codec.
1402
     * If there are multiple such fields in a container then the demuxer should choose the one
1403
     * which maximizes the information about the used codec.
1404
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1405
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1406
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1407
     * first.
1408
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1409
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1410
     */
1411
    unsigned int codec_tag;
1412

    
1413
    /**
1414
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1415
     * - encoding: Set by user
1416
     * - decoding: Set by user
1417
     */
1418
    int workaround_bugs;
1419
#define FF_BUG_AUTODETECT       1  ///< autodetection
1420
#define FF_BUG_OLD_MSMPEG4      2
1421
#define FF_BUG_XVID_ILACE       4
1422
#define FF_BUG_UMP4             8
1423
#define FF_BUG_NO_PADDING       16
1424
#define FF_BUG_AMV              32
1425
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1426
#define FF_BUG_QPEL_CHROMA      64
1427
#define FF_BUG_STD_QPEL         128
1428
#define FF_BUG_QPEL_CHROMA2     256
1429
#define FF_BUG_DIRECT_BLOCKSIZE 512
1430
#define FF_BUG_EDGE             1024
1431
#define FF_BUG_HPEL_CHROMA      2048
1432
#define FF_BUG_DC_CLIP          4096
1433
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1434
#define FF_BUG_TRUNCATED       16384
1435
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1436

    
1437
    /**
1438
     * luma single coefficient elimination threshold
1439
     * - encoding: Set by user.
1440
     * - decoding: unused
1441
     */
1442
    int luma_elim_threshold;
1443

    
1444
    /**
1445
     * chroma single coeff elimination threshold
1446
     * - encoding: Set by user.
1447
     * - decoding: unused
1448
     */
1449
    int chroma_elim_threshold;
1450

    
1451
    /**
1452
     * strictly follow the standard (MPEG4, ...).
1453
     * - encoding: Set by user.
1454
     * - decoding: Set by user.
1455
     * Setting this to STRICT or higher means the encoder and decoder will
1456
     * generally do stupid things, whereas setting it to unofficial or lower
1457
     * will mean the encoder might produce output that is not supported by all
1458
     * spec-compliant decoders. Decoders don't differentiate between normal,
1459
     * unofficial and experimental (that is, they always try to decode things
1460
     * when they can) unless they are explicitly asked to behave stupidly
1461
     * (=strictly conform to the specs)
1462
     */
1463
    int strict_std_compliance;
1464
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1465
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1466
#define FF_COMPLIANCE_NORMAL        0
1467
#if FF_API_INOFFICIAL
1468
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1469
#endif
1470
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1471
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1472

    
1473
    /**
1474
     * qscale offset between IP and B-frames
1475
     * - encoding: Set by user.
1476
     * - decoding: unused
1477
     */
1478
    float b_quant_offset;
1479

    
1480
    /**
1481
     * Error recognization; higher values will detect more errors but may
1482
     * misdetect some more or less valid parts as errors.
1483
     * - encoding: unused
1484
     * - decoding: Set by user.
1485
     */
1486
    int error_recognition;
1487
#define FF_ER_CAREFUL         1
1488
#define FF_ER_COMPLIANT       2
1489
#define FF_ER_AGGRESSIVE      3
1490
#define FF_ER_VERY_AGGRESSIVE 4
1491

    
1492
    /**
1493
     * Called at the beginning of each frame to get a buffer for it.
1494
     * If pic.reference is set then the frame will be read later by libavcodec.
1495
     * avcodec_align_dimensions2() should be used to find the required width and
1496
     * height, as they normally need to be rounded up to the next multiple of 16.
1497
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1498
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1499
     * some other means.
1500
     * If frame multithreading is used and thread_safe_callbacks is set,
1501
     * it may be called from a different thread, but not from more than one at once.
1502
     * Does not need to be reentrant.
1503
     * - encoding: unused
1504
     * - decoding: Set by libavcodec, user can override.
1505
     */
1506
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1507

    
1508
    /**
1509
     * Called to release buffers which were allocated with get_buffer.
1510
     * A released buffer can be reused in get_buffer().
1511
     * pic.data[*] must be set to NULL.
1512
     * May be called from a different thread if frame multithreading is used,
1513
     * but not by more than one thread at once, so does not need to be reentrant.
1514
     * - encoding: unused
1515
     * - decoding: Set by libavcodec, user can override.
1516
     */
1517
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1518

    
1519
    /**
1520
     * Size of the frame reordering buffer in the decoder.
1521
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1522
     * - encoding: Set by libavcodec.
1523
     * - decoding: Set by libavcodec.
1524
     */
1525
    int has_b_frames;
1526

    
1527
    /**
1528
     * number of bytes per packet if constant and known or 0
1529
     * Used by some WAV based audio codecs.
1530
     */
1531
    int block_align;
1532

    
1533
    int parse_only; /* - decoding only: If true, only parsing is done
1534
                       (function avcodec_parse_frame()). The frame
1535
                       data is returned. Only MPEG codecs support this now. */
1536

    
1537
    /**
1538
     * 0-> h263 quant 1-> mpeg quant
1539
     * - encoding: Set by user.
1540
     * - decoding: unused
1541
     */
1542
    int mpeg_quant;
1543

    
1544
    /**
1545
     * pass1 encoding statistics output buffer
1546
     * - encoding: Set by libavcodec.
1547
     * - decoding: unused
1548
     */
1549
    char *stats_out;
1550

    
1551
    /**
1552
     * pass2 encoding statistics input buffer
1553
     * Concatenated stuff from stats_out of pass1 should be placed here.
1554
     * - encoding: Allocated/set/freed by user.
1555
     * - decoding: unused
1556
     */
1557
    char *stats_in;
1558

    
1559
    /**
1560
     * ratecontrol qmin qmax limiting method
1561
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1562
     * - encoding: Set by user.
1563
     * - decoding: unused
1564
     */
1565
    float rc_qsquish;
1566

    
1567
    float rc_qmod_amp;
1568
    int rc_qmod_freq;
1569

    
1570
    /**
1571
     * ratecontrol override, see RcOverride
1572
     * - encoding: Allocated/set/freed by user.
1573
     * - decoding: unused
1574
     */
1575
    RcOverride *rc_override;
1576
    int rc_override_count;
1577

    
1578
    /**
1579
     * rate control equation
1580
     * - encoding: Set by user
1581
     * - decoding: unused
1582
     */
1583
    const char *rc_eq;
1584

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

    
1592
    /**
1593
     * minimum bitrate
1594
     * - encoding: Set by user.
1595
     * - decoding: unused
1596
     */
1597
    int rc_min_rate;
1598

    
1599
    /**
1600
     * decoder bitstream buffer size
1601
     * - encoding: Set by user.
1602
     * - decoding: unused
1603
     */
1604
    int rc_buffer_size;
1605
    float rc_buffer_aggressivity;
1606

    
1607
    /**
1608
     * qscale factor between P and I-frames
1609
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1610
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1611
     * - encoding: Set by user.
1612
     * - decoding: unused
1613
     */
1614
    float i_quant_factor;
1615

    
1616
    /**
1617
     * qscale offset between P and I-frames
1618
     * - encoding: Set by user.
1619
     * - decoding: unused
1620
     */
1621
    float i_quant_offset;
1622

    
1623
    /**
1624
     * initial complexity for pass1 ratecontrol
1625
     * - encoding: Set by user.
1626
     * - decoding: unused
1627
     */
1628
    float rc_initial_cplx;
1629

    
1630
    /**
1631
     * DCT algorithm, see FF_DCT_* below
1632
     * - encoding: Set by user.
1633
     * - decoding: unused
1634
     */
1635
    int dct_algo;
1636
#define FF_DCT_AUTO    0
1637
#define FF_DCT_FASTINT 1
1638
#define FF_DCT_INT     2
1639
#define FF_DCT_MMX     3
1640
#define FF_DCT_MLIB    4
1641
#define FF_DCT_ALTIVEC 5
1642
#define FF_DCT_FAAN    6
1643

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

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

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

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

    
1672
    /**
1673
     * darkness masking (0-> disabled)
1674
     * - encoding: Set by user.
1675
     * - decoding: unused
1676
     */
1677
    float dark_masking;
1678

    
1679
    /**
1680
     * IDCT algorithm, see FF_IDCT_* below.
1681
     * - encoding: Set by user.
1682
     * - decoding: Set by user.
1683
     */
1684
    int idct_algo;
1685
#define FF_IDCT_AUTO          0
1686
#define FF_IDCT_INT           1
1687
#define FF_IDCT_SIMPLE        2
1688
#define FF_IDCT_SIMPLEMMX     3
1689
#define FF_IDCT_LIBMPEG2MMX   4
1690
#define FF_IDCT_PS2           5
1691
#define FF_IDCT_MLIB          6
1692
#define FF_IDCT_ARM           7
1693
#define FF_IDCT_ALTIVEC       8
1694
#define FF_IDCT_SH4           9
1695
#define FF_IDCT_SIMPLEARM     10
1696
#define FF_IDCT_H264          11
1697
#define FF_IDCT_VP3           12
1698
#define FF_IDCT_IPP           13
1699
#define FF_IDCT_XVIDMMX       14
1700
#define FF_IDCT_CAVS          15
1701
#define FF_IDCT_SIMPLEARMV5TE 16
1702
#define FF_IDCT_SIMPLEARMV6   17
1703
#define FF_IDCT_SIMPLEVIS     18
1704
#define FF_IDCT_WMV2          19
1705
#define FF_IDCT_FAAN          20
1706
#define FF_IDCT_EA            21
1707
#define FF_IDCT_SIMPLENEON    22
1708
#define FF_IDCT_SIMPLEALPHA   23
1709
#define FF_IDCT_BINK          24
1710

    
1711
    /**
1712
     * slice count
1713
     * - encoding: Set by libavcodec.
1714
     * - decoding: Set by user (or 0).
1715
     */
1716
    int slice_count;
1717
    /**
1718
     * slice offsets in the frame in bytes
1719
     * - encoding: Set/allocated by libavcodec.
1720
     * - decoding: Set/allocated by user (or NULL).
1721
     */
1722
    int *slice_offset;
1723

    
1724
    /**
1725
     * error concealment flags
1726
     * - encoding: unused
1727
     * - decoding: Set by user.
1728
     */
1729
    int error_concealment;
1730
#define FF_EC_GUESS_MVS   1
1731
#define FF_EC_DEBLOCK     2
1732

    
1733
    /**
1734
     * dsp_mask could be add used to disable unwanted CPU features
1735
     * CPU features (i.e. MMX, SSE. ...)
1736
     *
1737
     * With the FORCE flag you may instead enable given CPU features.
1738
     * (Dangerous: Usable in case of misdetection, improper usage however will
1739
     * result into program crash.)
1740
     */
1741
    unsigned dsp_mask;
1742

    
1743
#if FF_API_MM_FLAGS
1744
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1745
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1746
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1747
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1748
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1749
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1750
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1751
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1752
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1753
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1754
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1755
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1756
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1757
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1758
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1759
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1760
#endif
1761

    
1762
    /**
1763
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1764
     * - encoding: Set by libavcodec.
1765
     * - decoding: Set by user.
1766
     */
1767
     int bits_per_coded_sample;
1768

    
1769
    /**
1770
     * prediction method (needed for huffyuv)
1771
     * - encoding: Set by user.
1772
     * - decoding: unused
1773
     */
1774
     int prediction_method;
1775
#define FF_PRED_LEFT   0
1776
#define FF_PRED_PLANE  1
1777
#define FF_PRED_MEDIAN 2
1778

    
1779
    /**
1780
     * sample aspect ratio (0 if unknown)
1781
     * That is the width of a pixel divided by the height of the pixel.
1782
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1783
     * - encoding: Set by user.
1784
     * - decoding: Set by libavcodec.
1785
     */
1786
    AVRational sample_aspect_ratio;
1787

    
1788
    /**
1789
     * the picture in the bitstream
1790
     * - encoding: Set by libavcodec.
1791
     * - decoding: Set by libavcodec.
1792
     */
1793
    AVFrame *coded_frame;
1794

    
1795
    /**
1796
     * debug
1797
     * - encoding: Set by user.
1798
     * - decoding: Set by user.
1799
     */
1800
    int debug;
1801
#define FF_DEBUG_PICT_INFO   1
1802
#define FF_DEBUG_RC          2
1803
#define FF_DEBUG_BITSTREAM   4
1804
#define FF_DEBUG_MB_TYPE     8
1805
#define FF_DEBUG_QP          16
1806
#define FF_DEBUG_MV          32
1807
#define FF_DEBUG_DCT_COEFF   0x00000040
1808
#define FF_DEBUG_SKIP        0x00000080
1809
#define FF_DEBUG_STARTCODE   0x00000100
1810
#define FF_DEBUG_PTS         0x00000200
1811
#define FF_DEBUG_ER          0x00000400
1812
#define FF_DEBUG_MMCO        0x00000800
1813
#define FF_DEBUG_BUGS        0x00001000
1814
#define FF_DEBUG_VIS_QP      0x00002000
1815
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1816
#define FF_DEBUG_BUFFERS     0x00008000
1817
#define FF_DEBUG_THREADS     0x00010000
1818

    
1819
    /**
1820
     * debug
1821
     * - encoding: Set by user.
1822
     * - decoding: Set by user.
1823
     */
1824
    int debug_mv;
1825
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1826
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1827
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1828

    
1829
    /**
1830
     * error
1831
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1832
     * - decoding: unused
1833
     */
1834
    uint64_t error[4];
1835

    
1836
#if FF_API_MB_Q
1837
    /**
1838
     * minimum MB quantizer
1839
     * - encoding: unused
1840
     * - decoding: unused
1841
     */
1842
    attribute_deprecated int mb_qmin;
1843

    
1844
    /**
1845
     * maximum MB quantizer
1846
     * - encoding: unused
1847
     * - decoding: unused
1848
     */
1849
    attribute_deprecated int mb_qmax;
1850
#endif
1851

    
1852
    /**
1853
     * motion estimation comparison function
1854
     * - encoding: Set by user.
1855
     * - decoding: unused
1856
     */
1857
    int me_cmp;
1858
    /**
1859
     * subpixel motion estimation comparison function
1860
     * - encoding: Set by user.
1861
     * - decoding: unused
1862
     */
1863
    int me_sub_cmp;
1864
    /**
1865
     * macroblock comparison function (not supported yet)
1866
     * - encoding: Set by user.
1867
     * - decoding: unused
1868
     */
1869
    int mb_cmp;
1870
    /**
1871
     * interlaced DCT comparison function
1872
     * - encoding: Set by user.
1873
     * - decoding: unused
1874
     */
1875
    int ildct_cmp;
1876
#define FF_CMP_SAD    0
1877
#define FF_CMP_SSE    1
1878
#define FF_CMP_SATD   2
1879
#define FF_CMP_DCT    3
1880
#define FF_CMP_PSNR   4
1881
#define FF_CMP_BIT    5
1882
#define FF_CMP_RD     6
1883
#define FF_CMP_ZERO   7
1884
#define FF_CMP_VSAD   8
1885
#define FF_CMP_VSSE   9
1886
#define FF_CMP_NSSE   10
1887
#define FF_CMP_W53    11
1888
#define FF_CMP_W97    12
1889
#define FF_CMP_DCTMAX 13
1890
#define FF_CMP_DCT264 14
1891
#define FF_CMP_CHROMA 256
1892

    
1893
    /**
1894
     * ME diamond size & shape
1895
     * - encoding: Set by user.
1896
     * - decoding: unused
1897
     */
1898
    int dia_size;
1899

    
1900
    /**
1901
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1902
     * - encoding: Set by user.
1903
     * - decoding: unused
1904
     */
1905
    int last_predictor_count;
1906

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

    
1914
    /**
1915
     * motion estimation prepass comparison function
1916
     * - encoding: Set by user.
1917
     * - decoding: unused
1918
     */
1919
    int me_pre_cmp;
1920

    
1921
    /**
1922
     * ME prepass diamond size & shape
1923
     * - encoding: Set by user.
1924
     * - decoding: unused
1925
     */
1926
    int pre_dia_size;
1927

    
1928
    /**
1929
     * subpel ME quality
1930
     * - encoding: Set by user.
1931
     * - decoding: unused
1932
     */
1933
    int me_subpel_quality;
1934

    
1935
    /**
1936
     * callback to negotiate the pixelFormat
1937
     * @param fmt is the list of formats which are supported by the codec,
1938
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1939
     * The first is always the native one.
1940
     * @return the chosen format
1941
     * - encoding: unused
1942
     * - decoding: Set by user, if not set the native format will be chosen.
1943
     */
1944
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1945

    
1946
    /**
1947
     * DTG active format information (additional aspect ratio
1948
     * information only used in DVB MPEG-2 transport streams)
1949
     * 0 if not set.
1950
     *
1951
     * - encoding: unused
1952
     * - decoding: Set by decoder.
1953
     */
1954
    int dtg_active_format;
1955
#define FF_DTG_AFD_SAME         8
1956
#define FF_DTG_AFD_4_3          9
1957
#define FF_DTG_AFD_16_9         10
1958
#define FF_DTG_AFD_14_9         11
1959
#define FF_DTG_AFD_4_3_SP_14_9  13
1960
#define FF_DTG_AFD_16_9_SP_14_9 14
1961
#define FF_DTG_AFD_SP_4_3       15
1962

    
1963
    /**
1964
     * maximum motion estimation search range in subpel units
1965
     * If 0 then no limit.
1966
     *
1967
     * - encoding: Set by user.
1968
     * - decoding: unused
1969
     */
1970
    int me_range;
1971

    
1972
    /**
1973
     * intra quantizer bias
1974
     * - encoding: Set by user.
1975
     * - decoding: unused
1976
     */
1977
    int intra_quant_bias;
1978
#define FF_DEFAULT_QUANT_BIAS 999999
1979

    
1980
    /**
1981
     * inter quantizer bias
1982
     * - encoding: Set by user.
1983
     * - decoding: unused
1984
     */
1985
    int inter_quant_bias;
1986

    
1987
    /**
1988
     * color table ID
1989
     * - encoding: unused
1990
     * - decoding: Which clrtable should be used for 8bit RGB images.
1991
     *             Tables have to be stored somewhere. FIXME
1992
     */
1993
    int color_table_id;
1994

    
1995
    /**
1996
     * internal_buffer count
1997
     * Don't touch, used by libavcodec default_get_buffer().
1998
     */
1999
    int internal_buffer_count;
2000

    
2001
    /**
2002
     * internal_buffers
2003
     * Don't touch, used by libavcodec default_get_buffer().
2004
     */
2005
    void *internal_buffer;
2006

    
2007
    /**
2008
     * Global quality for codecs which cannot change it per frame.
2009
     * This should be proportional to MPEG-1/2/4 qscale.
2010
     * - encoding: Set by user.
2011
     * - decoding: unused
2012
     */
2013
    int global_quality;
2014

    
2015
#define FF_CODER_TYPE_VLC       0
2016
#define FF_CODER_TYPE_AC        1
2017
#define FF_CODER_TYPE_RAW       2
2018
#define FF_CODER_TYPE_RLE       3
2019
#define FF_CODER_TYPE_DEFLATE   4
2020
    /**
2021
     * coder type
2022
     * - encoding: Set by user.
2023
     * - decoding: unused
2024
     */
2025
    int coder_type;
2026

    
2027
    /**
2028
     * context model
2029
     * - encoding: Set by user.
2030
     * - decoding: unused
2031
     */
2032
    int context_model;
2033
#if 0
2034
    /**
2035
     *
2036
     * - encoding: unused
2037
     * - decoding: Set by user.
2038
     */
2039
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2040
#endif
2041

    
2042
    /**
2043
     * slice flags
2044
     * - encoding: unused
2045
     * - decoding: Set by user.
2046
     */
2047
    int slice_flags;
2048
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2049
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2050
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2051

    
2052
    /**
2053
     * XVideo Motion Acceleration
2054
     * - encoding: forbidden
2055
     * - decoding: set by decoder
2056
     */
2057
    int xvmc_acceleration;
2058

    
2059
    /**
2060
     * macroblock decision mode
2061
     * - encoding: Set by user.
2062
     * - decoding: unused
2063
     */
2064
    int mb_decision;
2065
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2066
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2067
#define FF_MB_DECISION_RD     2        ///< rate distortion
2068

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

    
2076
    /**
2077
     * custom inter quantization matrix
2078
     * - encoding: Set by user, can be NULL.
2079
     * - decoding: Set by libavcodec.
2080
     */
2081
    uint16_t *inter_matrix;
2082

    
2083
    /**
2084
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2085
     * This is used to work around some encoder bugs.
2086
     * - encoding: unused
2087
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2088
     */
2089
    unsigned int stream_codec_tag;
2090

    
2091
    /**
2092
     * scene change detection threshold
2093
     * 0 is default, larger means fewer detected scene changes.
2094
     * - encoding: Set by user.
2095
     * - decoding: unused
2096
     */
2097
    int scenechange_threshold;
2098

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

    
2106
    /**
2107
     * maximum Lagrange multipler
2108
     * - encoding: Set by user.
2109
     * - decoding: unused
2110
     */
2111
    int lmax;
2112

    
2113
#if FF_API_PALETTE_CONTROL
2114
    /**
2115
     * palette control structure
2116
     * - encoding: ??? (no palette-enabled encoder yet)
2117
     * - decoding: Set by user.
2118
     */
2119
    struct AVPaletteControl *palctrl;
2120
#endif
2121

    
2122
    /**
2123
     * noise reduction strength
2124
     * - encoding: Set by user.
2125
     * - decoding: unused
2126
     */
2127
    int noise_reduction;
2128

    
2129
    /**
2130
     * Called at the beginning of a frame to get cr buffer for it.
2131
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2132
     * libavcodec will pass previous buffer in pic, function should return
2133
     * same buffer or new buffer with old frame "painted" into it.
2134
     * If pic.data[0] == NULL must behave like get_buffer().
2135
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2136
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2137
     * some other means.
2138
     * - encoding: unused
2139
     * - decoding: Set by libavcodec, user can override.
2140
     */
2141
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2142

    
2143
    /**
2144
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2145
     * - encoding: Set by user.
2146
     * - decoding: unused
2147
     */
2148
    int rc_initial_buffer_occupancy;
2149

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

    
2157
    /**
2158
     * CODEC_FLAG2_*
2159
     * - encoding: Set by user.
2160
     * - decoding: Set by user.
2161
     */
2162
    int flags2;
2163

    
2164
    /**
2165
     * Simulates errors in the bitstream to test error concealment.
2166
     * - encoding: Set by user.
2167
     * - decoding: unused
2168
     */
2169
    int error_rate;
2170

    
2171
#if FF_API_ANTIALIAS_ALGO
2172
    /**
2173
     * MP3 antialias algorithm, see FF_AA_* below.
2174
     * - encoding: unused
2175
     * - decoding: Set by user.
2176
     */
2177
    attribute_deprecated int antialias_algo;
2178
#define FF_AA_AUTO    0
2179
#define FF_AA_FASTINT 1 //not implemented yet
2180
#define FF_AA_INT     2
2181
#define FF_AA_FLOAT   3
2182
#endif
2183

    
2184
    /**
2185
     * quantizer noise shaping
2186
     * - encoding: Set by user.
2187
     * - decoding: unused
2188
     */
2189
    int quantizer_noise_shaping;
2190

    
2191
    /**
2192
     * thread count
2193
     * is used to decide how many independent tasks should be passed to execute()
2194
     * - encoding: Set by user.
2195
     * - decoding: Set by user.
2196
     */
2197
    int thread_count;
2198

    
2199
    /**
2200
     * The codec may call this to execute several independent things.
2201
     * It will return only after finishing all tasks.
2202
     * The user may replace this with some multithreaded implementation,
2203
     * the default implementation will execute the parts serially.
2204
     * @param count the number of things to execute
2205
     * - encoding: Set by libavcodec, user can override.
2206
     * - decoding: Set by libavcodec, user can override.
2207
     */
2208
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2209

    
2210
    /**
2211
     * thread opaque
2212
     * Can be used by execute() to store some per AVCodecContext stuff.
2213
     * - encoding: set by execute()
2214
     * - decoding: set by execute()
2215
     */
2216
    void *thread_opaque;
2217

    
2218
    /**
2219
     * Motion estimation threshold below which no motion estimation is
2220
     * performed, but instead the user specified motion vectors are used.
2221
     *
2222
     * - encoding: Set by user.
2223
     * - decoding: unused
2224
     */
2225
     int me_threshold;
2226

    
2227
    /**
2228
     * Macroblock threshold below which the user specified macroblock types will be used.
2229
     * - encoding: Set by user.
2230
     * - decoding: unused
2231
     */
2232
     int mb_threshold;
2233

    
2234
    /**
2235
     * precision of the intra DC coefficient - 8
2236
     * - encoding: Set by user.
2237
     * - decoding: unused
2238
     */
2239
     int intra_dc_precision;
2240

    
2241
    /**
2242
     * noise vs. sse weight for the nsse comparsion function
2243
     * - encoding: Set by user.
2244
     * - decoding: unused
2245
     */
2246
     int nsse_weight;
2247

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

    
2255
    /**
2256
     * Number of macroblock rows at the bottom which are skipped.
2257
     * - encoding: unused
2258
     * - decoding: Set by user.
2259
     */
2260
     int skip_bottom;
2261

    
2262
    /**
2263
     * profile
2264
     * - encoding: Set by user.
2265
     * - decoding: Set by libavcodec.
2266
     */
2267
     int profile;
2268
#define FF_PROFILE_UNKNOWN -99
2269
#define FF_PROFILE_RESERVED -100
2270

    
2271
#define FF_PROFILE_AAC_MAIN 0
2272
#define FF_PROFILE_AAC_LOW  1
2273
#define FF_PROFILE_AAC_SSR  2
2274
#define FF_PROFILE_AAC_LTP  3
2275

    
2276
#define FF_PROFILE_DTS         20
2277
#define FF_PROFILE_DTS_ES      30
2278
#define FF_PROFILE_DTS_96_24   40
2279
#define FF_PROFILE_DTS_HD_HRA  50
2280
#define FF_PROFILE_DTS_HD_MA   60
2281

    
2282
#define FF_PROFILE_MPEG2_422    0
2283
#define FF_PROFILE_MPEG2_HIGH   1
2284
#define FF_PROFILE_MPEG2_SS     2
2285
#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
2286
#define FF_PROFILE_MPEG2_MAIN   4
2287
#define FF_PROFILE_MPEG2_SIMPLE 5
2288

    
2289
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2290
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2291

    
2292
#define FF_PROFILE_H264_BASELINE             66
2293
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2294
#define FF_PROFILE_H264_MAIN                 77
2295
#define FF_PROFILE_H264_EXTENDED             88
2296
#define FF_PROFILE_H264_HIGH                 100
2297
#define FF_PROFILE_H264_HIGH_10              110
2298
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2299
#define FF_PROFILE_H264_HIGH_422             122
2300
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2301
#define FF_PROFILE_H264_HIGH_444             144
2302
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2303
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2304
#define FF_PROFILE_H264_CAVLC_444            44
2305

    
2306
#define FF_PROFILE_VC1_SIMPLE   0
2307
#define FF_PROFILE_VC1_MAIN     1
2308
#define FF_PROFILE_VC1_COMPLEX  2
2309
#define FF_PROFILE_VC1_ADVANCED 3
2310

    
2311
    /**
2312
     * level
2313
     * - encoding: Set by user.
2314
     * - decoding: Set by libavcodec.
2315
     */
2316
     int level;
2317
#define FF_LEVEL_UNKNOWN -99
2318

    
2319
    /**
2320
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2321
     * - encoding: unused
2322
     * - decoding: Set by user.
2323
     */
2324
     int lowres;
2325

    
2326
    /**
2327
     * Bitstream width / height, may be different from width/height if lowres
2328
     * or other things are used.
2329
     * - encoding: unused
2330
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2331
     */
2332
    int coded_width, coded_height;
2333

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

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

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

    
2355
    /**
2356
     * frame skip comparison function
2357
     * - encoding: Set by user.
2358
     * - decoding: unused
2359
     */
2360
    int frame_skip_cmp;
2361

    
2362
    /**
2363
     * Border processing masking, raises the quantizer for mbs on the borders
2364
     * of the picture.
2365
     * - encoding: Set by user.
2366
     * - decoding: unused
2367
     */
2368
    float border_masking;
2369

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

    
2377
    /**
2378
     * maximum MB lagrange multipler
2379
     * - encoding: Set by user.
2380
     * - decoding: unused
2381
     */
2382
    int mb_lmax;
2383

    
2384
    /**
2385
     *
2386
     * - encoding: Set by user.
2387
     * - decoding: unused
2388
     */
2389
    int me_penalty_compensation;
2390

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

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

    
2405
    /**
2406
     *
2407
     * - encoding: unused
2408
     * - decoding: Set by user.
2409
     */
2410
    enum AVDiscard skip_frame;
2411

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

    
2419
    /**
2420
     *
2421
     * - encoding: Set by user.
2422
     * - decoding: unused
2423
     */
2424
    int brd_scale;
2425

    
2426
    /**
2427
     * constant rate factor - quality-based VBR - values ~correspond to qps
2428
     * - encoding: Set by user.
2429
     * - decoding: unused
2430
     */
2431
    float crf;
2432

    
2433
    /**
2434
     * constant quantization parameter rate control method
2435
     * - encoding: Set by user.
2436
     * - decoding: unused
2437
     */
2438
    int cqp;
2439

    
2440
    /**
2441
     * minimum GOP size
2442
     * - encoding: Set by user.
2443
     * - decoding: unused
2444
     */
2445
    int keyint_min;
2446

    
2447
    /**
2448
     * number of reference frames
2449
     * - encoding: Set by user.
2450
     * - decoding: Set by lavc.
2451
     */
2452
    int refs;
2453

    
2454
    /**
2455
     * chroma qp offset from luma
2456
     * - encoding: Set by user.
2457
     * - decoding: unused
2458
     */
2459
    int chromaoffset;
2460

    
2461
    /**
2462
     * Influences how often B-frames are used.
2463
     * - encoding: Set by user.
2464
     * - decoding: unused
2465
     */
2466
    int bframebias;
2467

    
2468
    /**
2469
     * trellis RD quantization
2470
     * - encoding: Set by user.
2471
     * - decoding: unused
2472
     */
2473
    int trellis;
2474

    
2475
    /**
2476
     * Reduce fluctuations in qp (before curve compression).
2477
     * - encoding: Set by user.
2478
     * - decoding: unused
2479
     */
2480
    float complexityblur;
2481

    
2482
    /**
2483
     * in-loop deblocking filter alphac0 parameter
2484
     * alpha is in the range -6...6
2485
     * - encoding: Set by user.
2486
     * - decoding: unused
2487
     */
2488
    int deblockalpha;
2489

    
2490
    /**
2491
     * in-loop deblocking filter beta parameter
2492
     * beta is in the range -6...6
2493
     * - encoding: Set by user.
2494
     * - decoding: unused
2495
     */
2496
    int deblockbeta;
2497

    
2498
    /**
2499
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2500
     * - encoding: Set by user.
2501
     * - decoding: unused
2502
     */
2503
    int partitions;
2504
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2505
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2506
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2507
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2508
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2509

    
2510
    /**
2511
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2512
     * - encoding: Set by user.
2513
     * - decoding: unused
2514
     */
2515
    int directpred;
2516

    
2517
    /**
2518
     * Audio cutoff bandwidth (0 means "automatic")
2519
     * - encoding: Set by user.
2520
     * - decoding: unused
2521
     */
2522
    int cutoff;
2523

    
2524
    /**
2525
     * Multiplied by qscale for each frame and added to scene_change_score.
2526
     * - encoding: Set by user.
2527
     * - decoding: unused
2528
     */
2529
    int scenechange_factor;
2530

    
2531
    /**
2532
     *
2533
     * Note: Value depends upon the compare function used for fullpel ME.
2534
     * - encoding: Set by user.
2535
     * - decoding: unused
2536
     */
2537
    int mv0_threshold;
2538

    
2539
    /**
2540
     * Adjusts sensitivity of b_frame_strategy 1.
2541
     * - encoding: Set by user.
2542
     * - decoding: unused
2543
     */
2544
    int b_sensitivity;
2545

    
2546
    /**
2547
     * - encoding: Set by user.
2548
     * - decoding: unused
2549
     */
2550
    int compression_level;
2551
#define FF_COMPRESSION_DEFAULT -1
2552

    
2553
#if FF_API_USE_LPC
2554
    /**
2555
     * Sets whether to use LPC mode - used by FLAC encoder.
2556
     * - encoding: Set by user.
2557
     * - decoding: unused
2558
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2559
     */
2560
    int use_lpc;
2561
#endif
2562

    
2563
    /**
2564
     * LPC coefficient precision - used by FLAC encoder
2565
     * - encoding: Set by user.
2566
     * - decoding: unused
2567
     */
2568
    int lpc_coeff_precision;
2569

    
2570
    /**
2571
     * - encoding: Set by user.
2572
     * - decoding: unused
2573
     */
2574
    int min_prediction_order;
2575

    
2576
    /**
2577
     * - encoding: Set by user.
2578
     * - decoding: unused
2579
     */
2580
    int max_prediction_order;
2581

    
2582
    /**
2583
     * search method for selecting prediction order
2584
     * - encoding: Set by user.
2585
     * - decoding: unused
2586
     */
2587
    int prediction_order_method;
2588

    
2589
    /**
2590
     * - encoding: Set by user.
2591
     * - decoding: unused
2592
     */
2593
    int min_partition_order;
2594

    
2595
    /**
2596
     * - encoding: Set by user.
2597
     * - decoding: unused
2598
     */
2599
    int max_partition_order;
2600

    
2601
    /**
2602
     * GOP timecode frame start number, in non drop frame format
2603
     * - encoding: Set by user.
2604
     * - decoding: unused
2605
     */
2606
    int64_t timecode_frame_start;
2607

    
2608
#if FF_API_REQUEST_CHANNELS
2609
    /**
2610
     * Decoder should decode to this many channels if it can (0 for default)
2611
     * - encoding: unused
2612
     * - decoding: Set by user.
2613
     * @deprecated Deprecated in favor of request_channel_layout.
2614
     */
2615
    int request_channels;
2616
#endif
2617

    
2618
    /**
2619
     * Percentage of dynamic range compression to be applied by the decoder.
2620
     * The default value is 1.0, corresponding to full compression.
2621
     * - encoding: unused
2622
     * - decoding: Set by user.
2623
     */
2624
    float drc_scale;
2625

    
2626
    /**
2627
     * opaque 64bit number (generally a PTS) that will be reordered and
2628
     * output in AVFrame.reordered_opaque
2629
     * @deprecated in favor of pkt_pts
2630
     * - encoding: unused
2631
     * - decoding: Set by user.
2632
     */
2633
    int64_t reordered_opaque;
2634

    
2635
    /**
2636
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2637
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2638
     * - encoding: set by user.
2639
     * - decoding: set by libavcodec.
2640
     */
2641
    int bits_per_raw_sample;
2642

    
2643
    /**
2644
     * Audio channel layout.
2645
     * - encoding: set by user.
2646
     * - decoding: set by libavcodec.
2647
     */
2648
    int64_t channel_layout;
2649

    
2650
    /**
2651
     * Request decoder to use this channel layout if it can (0 for default)
2652
     * - encoding: unused
2653
     * - decoding: Set by user.
2654
     */
2655
    int64_t request_channel_layout;
2656

    
2657
    /**
2658
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2659
     * - encoding: Set by user.
2660
     * - decoding: unused.
2661
     */
2662
    float rc_max_available_vbv_use;
2663

    
2664
    /**
2665
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2666
     * - encoding: Set by user.
2667
     * - decoding: unused.
2668
     */
2669
    float rc_min_vbv_overflow_use;
2670

    
2671
    /**
2672
     * Hardware accelerator in use
2673
     * - encoding: unused.
2674
     * - decoding: Set by libavcodec
2675
     */
2676
    struct AVHWAccel *hwaccel;
2677

    
2678
    /**
2679
     * For some codecs, the time base is closer to the field rate than the frame rate.
2680
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2681
     * if no telecine is used ...
2682
     *
2683
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2684
     */
2685
    int ticks_per_frame;
2686

    
2687
    /**
2688
     * Hardware accelerator context.
2689
     * For some hardware accelerators, a global context needs to be
2690
     * provided by the user. In that case, this holds display-dependent
2691
     * data FFmpeg cannot instantiate itself. Please refer to the
2692
     * FFmpeg HW accelerator documentation to know how to fill this
2693
     * is. e.g. for VA API, this is a struct vaapi_context.
2694
     * - encoding: unused
2695
     * - decoding: Set by user
2696
     */
2697
    void *hwaccel_context;
2698

    
2699
    /**
2700
     * Chromaticity coordinates of the source primaries.
2701
     * - encoding: Set by user
2702
     * - decoding: Set by libavcodec
2703
     */
2704
    enum AVColorPrimaries color_primaries;
2705

    
2706
    /**
2707
     * Color Transfer Characteristic.
2708
     * - encoding: Set by user
2709
     * - decoding: Set by libavcodec
2710
     */
2711
    enum AVColorTransferCharacteristic color_trc;
2712

    
2713
    /**
2714
     * YUV colorspace type.
2715
     * - encoding: Set by user
2716
     * - decoding: Set by libavcodec
2717
     */
2718
    enum AVColorSpace colorspace;
2719

    
2720
    /**
2721
     * MPEG vs JPEG YUV range.
2722
     * - encoding: Set by user
2723
     * - decoding: Set by libavcodec
2724
     */
2725
    enum AVColorRange color_range;
2726

    
2727
    /**
2728
     * This defines the location of chroma samples.
2729
     * - encoding: Set by user
2730
     * - decoding: Set by libavcodec
2731
     */
2732
    enum AVChromaLocation chroma_sample_location;
2733

    
2734
    /**
2735
     * The codec may call this to execute several independent things.
2736
     * It will return only after finishing all tasks.
2737
     * The user may replace this with some multithreaded implementation,
2738
     * the default implementation will execute the parts serially.
2739
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2740
     * @param c context passed also to func
2741
     * @param count the number of things to execute
2742
     * @param arg2 argument passed unchanged to func
2743
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2744
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2745
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2746
     *             two instances of func executing at the same time will have the same threadnr.
2747
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2748
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2749
     * - encoding: Set by libavcodec, user can override.
2750
     * - decoding: Set by libavcodec, user can override.
2751
     */
2752
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2753

    
2754
    /**
2755
     * explicit P-frame weighted prediction analysis method
2756
     * 0: off
2757
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2758
     * 2: smart weighting (full fade detection analysis)
2759
     * - encoding: Set by user.
2760
     * - decoding: unused
2761
     */
2762
    int weighted_p_pred;
2763

    
2764
    /**
2765
     * AQ mode
2766
     * 0: Disabled
2767
     * 1: Variance AQ (complexity mask)
2768
     * 2: Auto-variance AQ (experimental)
2769
     * - encoding: Set by user
2770
     * - decoding: unused
2771
     */
2772
    int aq_mode;
2773

    
2774
    /**
2775
     * AQ strength
2776
     * Reduces blocking and blurring in flat and textured areas.
2777
     * - encoding: Set by user
2778
     * - decoding: unused
2779
     */
2780
    float aq_strength;
2781

    
2782
    /**
2783
     * PSY RD
2784
     * Strength of psychovisual optimization
2785
     * - encoding: Set by user
2786
     * - decoding: unused
2787
     */
2788
    float psy_rd;
2789

    
2790
    /**
2791
     * PSY trellis
2792
     * Strength of psychovisual optimization
2793
     * - encoding: Set by user
2794
     * - decoding: unused
2795
     */
2796
    float psy_trellis;
2797

    
2798
    /**
2799
     * RC lookahead
2800
     * Number of frames for frametype and ratecontrol lookahead
2801
     * - encoding: Set by user
2802
     * - decoding: unused
2803
     */
2804
    int rc_lookahead;
2805

    
2806
    /**
2807
     * Constant rate factor maximum
2808
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2809
     * than crf_max, even if doing so would violate VBV restrictions.
2810
     * - encoding: Set by user.
2811
     * - decoding: unused
2812
     */
2813
    float crf_max;
2814

    
2815
    int log_level_offset;
2816

    
2817
    /**
2818
     * Determines which LPC analysis algorithm to use.
2819
     * - encoding: Set by user
2820
     * - decoding: unused
2821
     */
2822
    enum AVLPCType lpc_type;
2823

    
2824
    /**
2825
     * Number of passes to use for Cholesky factorization during LPC analysis
2826
     * - encoding: Set by user
2827
     * - decoding: unused
2828
     */
2829
    int lpc_passes;
2830

    
2831
    /**
2832
     * Number of slices.
2833
     * Indicates number of picture subdivisions. Used for parallelized
2834
     * decoding.
2835
     * - encoding: Set by user
2836
     * - decoding: unused
2837
     */
2838
    int slices;
2839

    
2840
    /**
2841
     * Header containing style information for text subtitles.
2842
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2843
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2844
     * the Format line following. It shouldn't include any Dialogue line.
2845
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2846
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2847
     */
2848
    uint8_t *subtitle_header;
2849
    int subtitle_header_size;
2850

    
2851
    /**
2852
     * Current packet as passed into the decoder, to avoid having
2853
     * to pass the packet into every function. Currently only valid
2854
     * inside lavc and get/release_buffer callbacks.
2855
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2856
     * - encoding: unused
2857
     */
2858
    AVPacket *pkt;
2859

    
2860
    /**
2861
     * Whether this is a copy of the context which had init() called on it.
2862
     * This is used by multithreading - shared tables and picture pointers
2863
     * should be freed from the original context only.
2864
     * - encoding: Set by libavcodec.
2865
     * - decoding: Set by libavcodec.
2866
     */
2867
    int is_copy;
2868

    
2869
    /**
2870
     * Which multithreading methods to use.
2871
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2872
     * so clients which cannot provide future frames should not use it.
2873
     *
2874
     * - encoding: Set by user, otherwise the default is used.
2875
     * - decoding: Set by user, otherwise the default is used.
2876
     */
2877
    int thread_type;
2878
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2879
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2880

    
2881
    /**
2882
     * Which multithreading methods are in use by the codec.
2883
     * - encoding: Set by libavcodec.
2884
     * - decoding: Set by libavcodec.
2885
     */
2886
    int active_thread_type;
2887

    
2888
    /**
2889
     * Set by the client if its custom get_buffer() callback can be called
2890
     * from another thread, which allows faster multithreaded decoding.
2891
     * draw_horiz_band() will be called from other threads regardless of this setting.
2892
     * Ignored if the default get_buffer() is used.
2893
     * - encoding: Set by user.
2894
     * - decoding: Set by user.
2895
     */
2896
    int thread_safe_callbacks;
2897

    
2898
    /**
2899
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2900
     * Used for compliant TS muxing.
2901
     * - encoding: Set by libavcodec.
2902
     * - decoding: unused.
2903
     */
2904
    uint64_t vbv_delay;
2905

    
2906
    /**
2907
     * Type of service that the audio stream conveys.
2908
     * - encoding: Set by user.
2909
     * - decoding: Set by libavcodec.
2910
     */
2911
    enum AVAudioServiceType audio_service_type;
2912
} AVCodecContext;
2913

    
2914
/**
2915
 * AVProfile.
2916
 */
2917
typedef struct AVProfile {
2918
    int profile;
2919
    const char *name; ///< short name for the profile
2920
} AVProfile;
2921

    
2922
/**
2923
 * AVCodec.
2924
 */
2925
typedef struct AVCodec {
2926
    /**
2927
     * Name of the codec implementation.
2928
     * The name is globally unique among encoders and among decoders (but an
2929
     * encoder and a decoder can share the same name).
2930
     * This is the primary way to find a codec from the user perspective.
2931
     */
2932
    const char *name;
2933
    enum AVMediaType type;
2934
    enum CodecID id;
2935
    int priv_data_size;
2936
    int (*init)(AVCodecContext *);
2937
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2938
    int (*close)(AVCodecContext *);
2939
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2940
    /**
2941
     * Codec capabilities.
2942
     * see CODEC_CAP_*
2943
     */
2944
    int capabilities;
2945
    struct AVCodec *next;
2946
    /**
2947
     * Flush buffers.
2948
     * Will be called when seeking
2949
     */
2950
    void (*flush)(AVCodecContext *);
2951
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2952
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2953
    /**
2954
     * Descriptive name for the codec, meant to be more human readable than name.
2955
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2956
     */
2957
    const char *long_name;
2958
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2959
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2960
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2961
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2962
    const AVClass *priv_class;              ///< AVClass for the private context
2963
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2964

    
2965
    /**
2966
     * @defgroup framethreading Frame-level threading support functions.
2967
     * @{
2968
     */
2969
    /**
2970
     * If defined, called on thread contexts when they are created.
2971
     * If the codec allocates writable tables in init(), re-allocate them here.
2972
     * priv_data will be set to a copy of the original.
2973
     */
2974
    int (*init_thread_copy)(AVCodecContext *);
2975
    /**
2976
     * Copy necessary context variables from a previous thread context to the current one.
2977
     * If not defined, the next thread will start automatically; otherwise, the codec
2978
     * must call ff_thread_finish_setup().
2979
     *
2980
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2981
     */
2982
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2983
    /** @} */
2984
} AVCodec;
2985

    
2986
/**
2987
 * AVHWAccel.
2988
 */
2989
typedef struct AVHWAccel {
2990
    /**
2991
     * Name of the hardware accelerated codec.
2992
     * The name is globally unique among encoders and among decoders (but an
2993
     * encoder and a decoder can share the same name).
2994
     */
2995
    const char *name;
2996

    
2997
    /**
2998
     * Type of codec implemented by the hardware accelerator.
2999
     *
3000
     * See AVMEDIA_TYPE_xxx
3001
     */
3002
    enum AVMediaType type;
3003

    
3004
    /**
3005
     * Codec implemented by the hardware accelerator.
3006
     *
3007
     * See CODEC_ID_xxx
3008
     */
3009
    enum CodecID id;
3010

    
3011
    /**
3012
     * Supported pixel format.
3013
     *
3014
     * Only hardware accelerated formats are supported here.
3015
     */
3016
    enum PixelFormat pix_fmt;
3017

    
3018
    /**
3019
     * Hardware accelerated codec capabilities.
3020
     * see FF_HWACCEL_CODEC_CAP_*
3021
     */
3022
    int capabilities;
3023

    
3024
    struct AVHWAccel *next;
3025

    
3026
    /**
3027
     * Called at the beginning of each frame or field picture.
3028
     *
3029
     * Meaningful frame information (codec specific) is guaranteed to
3030
     * be parsed at this point. This function is mandatory.
3031
     *
3032
     * Note that buf can be NULL along with buf_size set to 0.
3033
     * Otherwise, this means the whole frame is available at this point.
3034
     *
3035
     * @param avctx the codec context
3036
     * @param buf the frame data buffer base
3037
     * @param buf_size the size of the frame in bytes
3038
     * @return zero if successful, a negative value otherwise
3039
     */
3040
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3041

    
3042
    /**
3043
     * Callback for each slice.
3044
     *
3045
     * Meaningful slice information (codec specific) is guaranteed to
3046
     * be parsed at this point. This function is mandatory.
3047
     *
3048
     * @param avctx the codec context
3049
     * @param buf the slice data buffer base
3050
     * @param buf_size the size of the slice in bytes
3051
     * @return zero if successful, a negative value otherwise
3052
     */
3053
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3054

    
3055
    /**
3056
     * Called at the end of each frame or field picture.
3057
     *
3058
     * The whole picture is parsed at this point and can now be sent
3059
     * to the hardware accelerator. This function is mandatory.
3060
     *
3061
     * @param avctx the codec context
3062
     * @return zero if successful, a negative value otherwise
3063
     */
3064
    int (*end_frame)(AVCodecContext *avctx);
3065

    
3066
    /**
3067
     * Size of HW accelerator private data.
3068
     *
3069
     * Private data is allocated with av_mallocz() before
3070
     * AVCodecContext.get_buffer() and deallocated after
3071
     * AVCodecContext.release_buffer().
3072
     */
3073
    int priv_data_size;
3074
} AVHWAccel;
3075

    
3076
/**
3077
 * four components are given, that's all.
3078
 * the last component is alpha
3079
 */
3080
typedef struct AVPicture {
3081
    uint8_t *data[4];
3082
    int linesize[4];       ///< number of bytes per line
3083
} AVPicture;
3084

    
3085
#if FF_API_PALETTE_CONTROL
3086
/**
3087
 * AVPaletteControl
3088
 * This structure defines a method for communicating palette changes
3089
 * between and demuxer and a decoder.
3090
 *
3091
 * @deprecated Use AVPacket to send palette changes instead.
3092
 * This is totally broken.
3093
 */
3094
#define AVPALETTE_SIZE 1024
3095
#define AVPALETTE_COUNT 256
3096
typedef struct AVPaletteControl {
3097

    
3098
    /* Demuxer sets this to 1 to indicate the palette has changed;
3099
     * decoder resets to 0. */
3100
    int palette_changed;
3101

    
3102
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3103
     * the individual palette components should be on a 8-bit scale; if
3104
     * the palette data comes from an IBM VGA native format, the component
3105
     * data is probably 6 bits in size and needs to be scaled. */
3106
    unsigned int palette[AVPALETTE_COUNT];
3107

    
3108
} AVPaletteControl attribute_deprecated;
3109
#endif
3110

    
3111
enum AVSubtitleType {
3112
    SUBTITLE_NONE,
3113

    
3114
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3115

    
3116
    /**
3117
     * Plain text, the text field must be set by the decoder and is
3118
     * authoritative. ass and pict fields may contain approximations.
3119
     */
3120
    SUBTITLE_TEXT,
3121

    
3122
    /**
3123
     * Formatted text, the ass field must be set by the decoder and is
3124
     * authoritative. pict and text fields may contain approximations.
3125
     */
3126
    SUBTITLE_ASS,
3127
};
3128

    
3129
typedef struct AVSubtitleRect {
3130
    int x;         ///< top left corner  of pict, undefined when pict is not set
3131
    int y;         ///< top left corner  of pict, undefined when pict is not set
3132
    int w;         ///< width            of pict, undefined when pict is not set
3133
    int h;         ///< height           of pict, undefined when pict is not set
3134
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3135

    
3136
    /**
3137
     * data+linesize for the bitmap of this subtitle.
3138
     * can be set for text/ass as well once they where rendered
3139
     */
3140
    AVPicture pict;
3141
    enum AVSubtitleType type;
3142

    
3143
    char *text;                     ///< 0 terminated plain UTF-8 text
3144

    
3145
    /**
3146
     * 0 terminated ASS/SSA compatible event line.
3147
     * The pressentation of this is unaffected by the other values in this
3148
     * struct.
3149
     */
3150
    char *ass;
3151
} AVSubtitleRect;
3152

    
3153
typedef struct AVSubtitle {
3154
    uint16_t format; /* 0 = graphics */
3155
    uint32_t start_display_time; /* relative to packet pts, in ms */
3156
    uint32_t end_display_time; /* relative to packet pts, in ms */
3157
    unsigned num_rects;
3158
    AVSubtitleRect **rects;
3159
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3160
} AVSubtitle;
3161

    
3162
/* packet functions */
3163

    
3164
/**
3165
 * @deprecated use NULL instead
3166
 */
3167
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3168

    
3169
/**
3170
 * Default packet destructor.
3171
 */
3172
void av_destruct_packet(AVPacket *pkt);
3173

    
3174
/**
3175
 * Initialize optional fields of a packet with default values.
3176
 *
3177
 * @param pkt packet
3178
 */
3179
void av_init_packet(AVPacket *pkt);
3180

    
3181
/**
3182
 * Allocate the payload of a packet and initialize its fields with
3183
 * default values.
3184
 *
3185
 * @param pkt packet
3186
 * @param size wanted payload size
3187
 * @return 0 if OK, AVERROR_xxx otherwise
3188
 */
3189
int av_new_packet(AVPacket *pkt, int size);
3190

    
3191
/**
3192
 * Reduce packet size, correctly zeroing padding
3193
 *
3194
 * @param pkt packet
3195
 * @param size new size
3196
 */
3197
void av_shrink_packet(AVPacket *pkt, int size);
3198

    
3199
/**
3200
 * Increase packet size, correctly zeroing padding
3201
 *
3202
 * @param pkt packet
3203
 * @param grow_by number of bytes by which to increase the size of the packet
3204
 */
3205
int av_grow_packet(AVPacket *pkt, int grow_by);
3206

    
3207
/**
3208
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3209
 * packet is allocated if it was not really allocated.
3210
 */
3211
int av_dup_packet(AVPacket *pkt);
3212

    
3213
/**
3214
 * Free a packet.
3215
 *
3216
 * @param pkt packet to free
3217
 */
3218
void av_free_packet(AVPacket *pkt);
3219

    
3220
/**
3221
 * Allocate new information of a packet.
3222
 *
3223
 * @param pkt packet
3224
 * @param type side information type
3225
 * @param size side information size
3226
 * @return pointer to fresh allocated data or NULL otherwise
3227
 */
3228
uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3229
                                 int size);
3230

    
3231
/**
3232
 * Get side information from packet.
3233
 *
3234
 * @param pkt packet
3235
 * @param type desired side information type
3236
 * @param size pointer for side information size to store (optional)
3237
 * @return pointer to data if present or NULL otherwise
3238
 */
3239
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
3240
                                 int *size);
3241

    
3242
/* resample.c */
3243

    
3244
struct ReSampleContext;
3245
struct AVResampleContext;
3246

    
3247
typedef struct ReSampleContext ReSampleContext;
3248

    
3249
#if FF_API_AUDIO_OLD
3250
/**
3251
 * @deprecated Use av_audio_resample_init() instead.
3252
 */
3253
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3254
                                                          int output_rate, int input_rate);
3255
#endif
3256

    
3257
/**
3258
 *  Initialize audio resampling context.
3259
 *
3260
 * @param output_channels  number of output channels
3261
 * @param input_channels   number of input channels
3262
 * @param output_rate      output sample rate
3263
 * @param input_rate       input sample rate
3264
 * @param sample_fmt_out   requested output sample format
3265
 * @param sample_fmt_in    input sample format
3266
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3267
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3268
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3269
                           between the 2 closest, if 0 the closest will be used
3270
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3271
 * @return allocated ReSampleContext, NULL if error occured
3272
 */
3273
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3274
                                        int output_rate, int input_rate,
3275
                                        enum AVSampleFormat sample_fmt_out,
3276
                                        enum AVSampleFormat sample_fmt_in,
3277
                                        int filter_length, int log2_phase_count,
3278
                                        int linear, double cutoff);
3279

    
3280
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3281

    
3282
/**
3283
 * Free resample context.
3284
 *
3285
 * @param s a non-NULL pointer to a resample context previously
3286
 *          created with av_audio_resample_init()
3287
 */
3288
void audio_resample_close(ReSampleContext *s);
3289

    
3290

    
3291
/**
3292
 * Initialize an audio resampler.
3293
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3294
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3295
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3296
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3297
                 between the 2 closest, if 0 the closest will be used
3298
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3299
 */
3300
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3301

    
3302
/**
3303
 * Resample an array of samples using a previously configured context.
3304
 * @param src an array of unconsumed samples
3305
 * @param consumed the number of samples of src which have been consumed are returned here
3306
 * @param src_size the number of unconsumed samples available
3307
 * @param dst_size the amount of space in samples available in dst
3308
 * @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.
3309
 * @return the number of samples written in dst or -1 if an error occurred
3310
 */
3311
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3312

    
3313

    
3314
/**
3315
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3316
 * the resampler parameters, so no audible clicks or similar distortions occur
3317
 * @param compensation_distance distance in output samples over which the compensation should be performed
3318
 * @param sample_delta number of output samples which should be output less
3319
 *
3320
 * example: av_resample_compensate(c, 10, 500)
3321
 * here instead of 510 samples only 500 samples would be output
3322
 *
3323
 * note, due to rounding the actual compensation might be slightly different,
3324
 * especially if the compensation_distance is large and the in_rate used during init is small
3325
 */
3326
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3327
void av_resample_close(struct AVResampleContext *c);
3328

    
3329
/**
3330
 * Allocate memory for a picture.  Call avpicture_free to free it.
3331
 *
3332
 * @param picture the picture to be filled in
3333
 * @param pix_fmt the format of the picture
3334
 * @param width the width of the picture
3335
 * @param height the height of the picture
3336
 * @return zero if successful, a negative value if not
3337
 */
3338
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3339

    
3340
/**
3341
 * Free a picture previously allocated by avpicture_alloc().
3342
 *
3343
 * @param picture the AVPicture to be freed
3344
 */
3345
void avpicture_free(AVPicture *picture);
3346

    
3347
/**
3348
 * Fill in the AVPicture fields.
3349
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3350
 * which points to the image data buffer. Depending on the specified picture
3351
 * format, one or multiple image data pointers and line sizes will be set.
3352
 * If a planar format is specified, several pointers will be set pointing to
3353
 * the different picture planes and the line sizes of the different planes
3354
 * will be stored in the lines_sizes array.
3355
 * Call with ptr == NULL to get the required size for the ptr buffer.
3356
 *
3357
 * @param picture AVPicture whose fields are to be filled in
3358
 * @param ptr Buffer which will contain or contains the actual image data
3359
 * @param pix_fmt The format in which the picture data is stored.
3360
 * @param width the width of the image in pixels
3361
 * @param height the height of the image in pixels
3362
 * @return size of the image data in bytes
3363
 */
3364
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3365
                   enum PixelFormat pix_fmt, int width, int height);
3366
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3367
                     unsigned char *dest, int dest_size);
3368

    
3369
/**
3370
 * Calculate the size in bytes that a picture of the given width and height
3371
 * would occupy if stored in the given picture format.
3372
 * Note that this returns the size of a compact representation as generated
3373
 * by avpicture_layout, which can be smaller than the size required for e.g.
3374
 * avpicture_fill.
3375
 *
3376
 * @param pix_fmt the given picture format
3377
 * @param width the width of the image
3378
 * @param height the height of the image
3379
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3380
 */
3381
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3382
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3383
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3384
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3385

    
3386
#if LIBAVCODEC_VERSION_MAJOR < 53
3387
/**
3388
 * Return the pixel format corresponding to the name name.
3389
 *
3390
 * If there is no pixel format with name name, then look for a
3391
 * pixel format with the name corresponding to the native endian
3392
 * format of name.
3393
 * For example in a little-endian system, first look for "gray16",
3394
 * then for "gray16le".
3395
 *
3396
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3397
 *
3398
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3399
 */
3400
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3401
#endif
3402

    
3403
/**
3404
 * Return a value representing the fourCC code associated to the
3405
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3406
 * found.
3407
 */
3408
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3409

    
3410
/**
3411
 * Put a string representing the codec tag codec_tag in buf.
3412
 *
3413
 * @param buf_size size in bytes of buf
3414
 * @return the length of the string that would have been generated if
3415
 * enough space had been available, excluding the trailing null
3416
 */
3417
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3418

    
3419
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3420
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3421
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3422
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3423
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3424
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3425

    
3426
/**
3427
 * Compute what kind of losses will occur when converting from one specific
3428
 * pixel format to another.
3429
 * When converting from one pixel format to another, information loss may occur.
3430
 * For example, when converting from RGB24 to GRAY, the color information will
3431
 * be lost. Similarly, other losses occur when converting from some formats to
3432
 * other formats. These losses can involve loss of chroma, but also loss of
3433
 * resolution, loss of color depth, loss due to the color space conversion, loss
3434
 * of the alpha bits or loss due to color quantization.
3435
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3436
 * which will occur when converting from one pixel format to another.
3437
 *
3438
 * @param[in] dst_pix_fmt destination pixel format
3439
 * @param[in] src_pix_fmt source pixel format
3440
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3441
 * @return Combination of flags informing you what kind of losses will occur.
3442
 */
3443
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3444
                             int has_alpha);
3445

    
3446
/**
3447
 * Find the best pixel format to convert to given a certain source pixel
3448
 * format.  When converting from one pixel format to another, information loss
3449
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3450
 * information will be lost. Similarly, other losses occur when converting from
3451
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3452
 * the given pixel formats should be used to suffer the least amount of loss.
3453
 * The pixel formats from which it chooses one, are determined by the
3454
 * pix_fmt_mask parameter.
3455
 *
3456
 * @code
3457
 * src_pix_fmt = PIX_FMT_YUV420P;
3458
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3459
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3460
 * @endcode
3461
 *
3462
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3463
 * @param[in] src_pix_fmt source pixel format
3464
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3465
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3466
 * @return The best pixel format to convert to or -1 if none was found.
3467
 */
3468
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3469
                              int has_alpha, int *loss_ptr);
3470

    
3471
#if LIBAVCODEC_VERSION_MAJOR < 53
3472
/**
3473
 * @deprecated Use av_get_pix_fmt_string() instead.
3474
 */
3475
attribute_deprecated
3476
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3477
#endif
3478

    
3479
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3480
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3481

    
3482
/**
3483
 * Tell if an image really has transparent alpha values.
3484
 * @return ored mask of FF_ALPHA_xxx constants
3485
 */
3486
int img_get_alpha_info(const AVPicture *src,
3487
                       enum PixelFormat pix_fmt, int width, int height);
3488

    
3489
/* deinterlace a picture */
3490
/* deinterlace - if not supported return -1 */
3491
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3492
                          enum PixelFormat pix_fmt, int width, int height);
3493

    
3494
/* external high level API */
3495

    
3496
/**
3497
 * If c is NULL, returns the first registered codec,
3498
 * if c is non-NULL, returns the next registered codec after c,
3499
 * or NULL if c is the last one.
3500
 */
3501
AVCodec *av_codec_next(AVCodec *c);
3502

    
3503
/**
3504
 * Return the LIBAVCODEC_VERSION_INT constant.
3505
 */
3506
unsigned avcodec_version(void);
3507

    
3508
/**
3509
 * Return the libavcodec build-time configuration.
3510
 */
3511
const char *avcodec_configuration(void);
3512

    
3513
/**
3514
 * Return the libavcodec license.
3515
 */
3516
const char *avcodec_license(void);
3517

    
3518
/**
3519
 * Initialize libavcodec.
3520
 *
3521
 * @warning This function must be called before any other libavcodec
3522
 * function.
3523
 */
3524
void avcodec_init(void);
3525

    
3526
#if LIBAVCODEC_VERSION_MAJOR < 53
3527
/**
3528
 * @deprecated Deprecated in favor of avcodec_register().
3529
 */
3530
attribute_deprecated void register_avcodec(AVCodec *codec);
3531
#endif
3532

    
3533
/**
3534
 * Register the codec codec and initialize libavcodec.
3535
 *
3536
 * @see avcodec_init()
3537
 */
3538
void avcodec_register(AVCodec *codec);
3539

    
3540
/**
3541
 * Find a registered encoder with a matching codec ID.
3542
 *
3543
 * @param id CodecID of the requested encoder
3544
 * @return An encoder if one was found, NULL otherwise.
3545
 */
3546
AVCodec *avcodec_find_encoder(enum CodecID id);
3547

    
3548
/**
3549
 * Find a registered encoder with the specified name.
3550
 *
3551
 * @param name name of the requested encoder
3552
 * @return An encoder if one was found, NULL otherwise.
3553
 */
3554
AVCodec *avcodec_find_encoder_by_name(const char *name);
3555

    
3556
/**
3557
 * Find a registered decoder with a matching codec ID.
3558
 *
3559
 * @param id CodecID of the requested decoder
3560
 * @return A decoder if one was found, NULL otherwise.
3561
 */
3562
AVCodec *avcodec_find_decoder(enum CodecID id);
3563

    
3564
/**
3565
 * Find a registered decoder with the specified name.
3566
 *
3567
 * @param name name of the requested decoder
3568
 * @return A decoder if one was found, NULL otherwise.
3569
 */
3570
AVCodec *avcodec_find_decoder_by_name(const char *name);
3571
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3572

    
3573
/**
3574
 * Return a name for the specified profile, if available.
3575
 *
3576
 * @param codec the codec that is searched for the given profile
3577
 * @param profile the profile value for which a name is requested
3578
 * @return A name for the profile if found, NULL otherwise.
3579
 */
3580
const char *av_get_profile_name(const AVCodec *codec, int profile);
3581

    
3582
/**
3583
 * Set the fields of the given AVCodecContext to default values.
3584
 *
3585
 * @param s The AVCodecContext of which the fields should be set to default values.
3586
 */
3587
void avcodec_get_context_defaults(AVCodecContext *s);
3588

    
3589
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3590
 *  we WILL change its arguments and name a few times! */
3591
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3592

    
3593
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3594
 *  we WILL change its arguments and name a few times! */
3595
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3596

    
3597
/**
3598
 * Allocate an AVCodecContext and set its fields to default values.  The
3599
 * resulting struct can be deallocated by simply calling av_free().
3600
 *
3601
 * @return An AVCodecContext filled with default values or NULL on failure.
3602
 * @see avcodec_get_context_defaults
3603
 */
3604
AVCodecContext *avcodec_alloc_context(void);
3605

    
3606
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3607
 *  we WILL change its arguments and name a few times! */
3608
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3609

    
3610
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3611
 *  we WILL change its arguments and name a few times! */
3612
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3613

    
3614
/**
3615
 * Copy the settings of the source AVCodecContext into the destination
3616
 * AVCodecContext. The resulting destination codec context will be
3617
 * unopened, i.e. you are required to call avcodec_open() before you
3618
 * can use this AVCodecContext to decode/encode video/audio data.
3619
 *
3620
 * @param dest target codec context, should be initialized with
3621
 *             avcodec_alloc_context(), but otherwise uninitialized
3622
 * @param src source codec context
3623
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3624
 */
3625
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3626

    
3627
/**
3628
 * Set the fields of the given AVFrame to default values.
3629
 *
3630
 * @param pic The AVFrame of which the fields should be set to default values.
3631
 */
3632
void avcodec_get_frame_defaults(AVFrame *pic);
3633

    
3634
/**
3635
 * Allocate an AVFrame and set its fields to default values.  The resulting
3636
 * struct can be deallocated by simply calling av_free().
3637
 *
3638
 * @return An AVFrame filled with default values or NULL on failure.
3639
 * @see avcodec_get_frame_defaults
3640
 */
3641
AVFrame *avcodec_alloc_frame(void);
3642

    
3643
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3644
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3645
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3646

    
3647
/**
3648
 * Return the amount of padding in pixels which the get_buffer callback must
3649
 * provide around the edge of the image for codecs which do not have the
3650
 * CODEC_FLAG_EMU_EDGE flag.
3651
 *
3652
 * @return Required padding in pixels.
3653
 */
3654
unsigned avcodec_get_edge_width(void);
3655
/**
3656
 * Modify width and height values so that they will result in a memory
3657
 * buffer that is acceptable for the codec if you do not use any horizontal
3658
 * padding.
3659
 *
3660
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3661
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3662
 * according to avcodec_get_edge_width() before.
3663
 */
3664
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3665
/**
3666
 * Modify width and height values so that they will result in a memory
3667
 * buffer that is acceptable for the codec if you also ensure that all
3668
 * line sizes are a multiple of the respective linesize_align[i].
3669
 *
3670
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3671
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3672
 * according to avcodec_get_edge_width() before.
3673
 */
3674
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3675
                               int linesize_align[4]);
3676

    
3677
#if LIBAVCODEC_VERSION_MAJOR < 53
3678
/**
3679
 * @deprecated Deprecated in favor of av_check_image_size().
3680
 */
3681
attribute_deprecated
3682
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3683
#endif
3684

    
3685
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3686

    
3687
#if LIBAVCODEC_VERSION_MAJOR < 53
3688
/**
3689
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3690
 */
3691
attribute_deprecated
3692
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3693
void avcodec_thread_free(AVCodecContext *s);
3694
#endif
3695
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3696
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3697
//FIXME func typedef
3698

    
3699
/**
3700
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3701
 * function the context has to be allocated.
3702
 *
3703
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3704
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3705
 * retrieving a codec.
3706
 *
3707
 * @warning This function is not thread safe!
3708
 *
3709
 * @code
3710
 * avcodec_register_all();
3711
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3712
 * if (!codec)
3713
 *     exit(1);
3714
 *
3715
 * context = avcodec_alloc_context();
3716
 *
3717
 * if (avcodec_open(context, codec) < 0)
3718
 *     exit(1);
3719
 * @endcode
3720
 *
3721
 * @param avctx The context which will be set up to use the given codec.
3722
 * @param codec The codec to use within the context.
3723
 * @return zero on success, a negative value on error
3724
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3725
 */
3726
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3727

    
3728
#if FF_API_AUDIO_OLD
3729
/**
3730
 * Decode an audio frame from buf into samples.
3731
 * Wrapper function which calls avcodec_decode_audio3.
3732
 *
3733
 * @deprecated Use avcodec_decode_audio3 instead.
3734
 * @param avctx the codec context
3735
 * @param[out] samples the output buffer
3736
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3737
 * @param[in] buf the input buffer
3738
 * @param[in] buf_size the input buffer size in bytes
3739
 * @return On error a negative value is returned, otherwise the number of bytes
3740
 * used or zero if no frame could be decompressed.
3741
 */
3742
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3743
                         int *frame_size_ptr,
3744
                         const uint8_t *buf, int buf_size);
3745
#endif
3746

    
3747
/**
3748
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3749
 * Some decoders may support multiple frames in a single AVPacket, such
3750
 * decoders would then just decode the first frame. In this case,
3751
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3752
 * the remaining data in order to decode the second frame etc.
3753
 * If no frame
3754
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3755
 * decompressed frame size in bytes.
3756
 *
3757
 * @warning You must set frame_size_ptr to the allocated size of the
3758
 * output buffer before calling avcodec_decode_audio3().
3759
 *
3760
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3761
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3762
 * bits at once and could read over the end.
3763
 *
3764
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3765
 * no overreading happens for damaged MPEG streams.
3766
 *
3767
 * @note You might have to align the input buffer avpkt->data and output buffer
3768
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3769
 * necessary at all, on others it won't work at all if not aligned and on others
3770
 * it will work but it will have an impact on performance.
3771
 *
3772
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3773
 * samples should be 16 byte aligned unless the CPU doesn't need it
3774
 * (AltiVec and SSE do).
3775
 *
3776
 * @param avctx the codec context
3777
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3778
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3779
 * @param[in] avpkt The input AVPacket containing the input buffer.
3780
 *            You can create such packet with av_init_packet() and by then setting
3781
 *            data and size, some decoders might in addition need other fields.
3782
 *            All decoders are designed to use the least fields possible though.
3783
 * @return On error a negative value is returned, otherwise the number of bytes
3784
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3785
 */
3786
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3787
                         int *frame_size_ptr,
3788
                         AVPacket *avpkt);
3789

    
3790
#if FF_API_VIDEO_OLD
3791
/**
3792
 * Decode a video frame from buf into picture.
3793
 * Wrapper function which calls avcodec_decode_video2.
3794
 *
3795
 * @deprecated Use avcodec_decode_video2 instead.
3796
 * @param avctx the codec context
3797
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3798
 * @param[in] buf the input buffer
3799
 * @param[in] buf_size the size of the input buffer in bytes
3800
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3801
 * @return On error a negative value is returned, otherwise the number of bytes
3802
 * used or zero if no frame could be decompressed.
3803
 */
3804
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3805
                         int *got_picture_ptr,
3806
                         const uint8_t *buf, int buf_size);
3807
#endif
3808

    
3809
/**
3810
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3811
 * Some decoders may support multiple frames in a single AVPacket, such
3812
 * decoders would then just decode the first frame.
3813
 *
3814
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3815
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3816
 * bits at once and could read over the end.
3817
 *
3818
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3819
 * no overreading happens for damaged MPEG streams.
3820
 *
3821
 * @note You might have to align the input buffer avpkt->data.
3822
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3823
 * necessary at all, on others it won't work at all if not aligned and on others
3824
 * it will work but it will have an impact on performance.
3825
 *
3826
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3827
 *
3828
 * @note Some codecs have a delay between input and output, these need to be
3829
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3830
 *
3831
 * @param avctx the codec context
3832
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3833
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3834
 *             allocate memory for the actual bitmap.
3835
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3836
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3837
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3838
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3839
 *
3840
 * @param[in] avpkt The input AVpacket containing the input buffer.
3841
 *            You can create such packet with av_init_packet() and by then setting
3842
 *            data and size, some decoders might in addition need other fields like
3843
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3844
 *            fields possible.
3845
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3846
 * @return On error a negative value is returned, otherwise the number of bytes
3847
 * used or zero if no frame could be decompressed.
3848
 */
3849
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3850
                         int *got_picture_ptr,
3851
                         AVPacket *avpkt);
3852

    
3853
#if FF_API_SUBTITLE_OLD
3854
/* Decode a subtitle message. Return -1 if error, otherwise return the
3855
 * number of bytes used. If no subtitle could be decompressed,
3856
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3857
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3858
                            int *got_sub_ptr,
3859
                            const uint8_t *buf, int buf_size);
3860
#endif
3861

    
3862
/**
3863
 * Decode a subtitle message.
3864
 * Return a negative value on error, otherwise return the number of bytes used.
3865
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3866
 * Otherwise, the subtitle is stored in *sub.
3867
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3868
 * simplicity, because the performance difference is expect to be negligible
3869
 * and reusing a get_buffer written for video codecs would probably perform badly
3870
 * due to a potentially very different allocation pattern.
3871
 *
3872
 * @param avctx the codec context
3873
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3874
                   freed with avsubtitle_free if *got_sub_ptr is set.
3875
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3876
 * @param[in] avpkt The input AVPacket containing the input buffer.
3877
 */
3878
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3879
                            int *got_sub_ptr,
3880
                            AVPacket *avpkt);
3881

    
3882
/**
3883
 * Frees all allocated data in the given subtitle struct.
3884
 *
3885
 * @param sub AVSubtitle to free.
3886
 */
3887
void avsubtitle_free(AVSubtitle *sub);
3888

    
3889
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3890
                        int *data_size_ptr,
3891
                        uint8_t *buf, int buf_size);
3892

    
3893
/**
3894
 * Encode an audio frame from samples into buf.
3895
 *
3896
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3897
 * However, for PCM audio the user will know how much space is needed
3898
 * because it depends on the value passed in buf_size as described
3899
 * below. In that case a lower value can be used.
3900
 *
3901
 * @param avctx the codec context
3902
 * @param[out] buf the output buffer
3903
 * @param[in] buf_size the output buffer size
3904
 * @param[in] samples the input buffer containing the samples
3905
 * The number of samples read from this buffer is frame_size*channels,
3906
 * both of which are defined in avctx.
3907
 * For PCM audio the number of samples read from samples is equal to
3908
 * buf_size * input_sample_size / output_sample_size.
3909
 * @return On error a negative value is returned, on success zero or the number
3910
 * of bytes used to encode the data read from the input buffer.
3911
 */
3912
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3913
                         const short *samples);
3914

    
3915
/**
3916
 * Encode a video frame from pict into buf.
3917
 * The input picture should be
3918
 * stored using a specific format, namely avctx.pix_fmt.
3919
 *
3920
 * @param avctx the codec context
3921
 * @param[out] buf the output buffer for the bitstream of encoded frame
3922
 * @param[in] buf_size the size of the output buffer in bytes
3923
 * @param[in] pict the input picture to encode
3924
 * @return On error a negative value is returned, on success zero or the number
3925
 * of bytes used from the output buffer.
3926
 */
3927
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3928
                         const AVFrame *pict);
3929
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3930
                            const AVSubtitle *sub);
3931

    
3932
int avcodec_close(AVCodecContext *avctx);
3933

    
3934
/**
3935
 * Register all the codecs, parsers and bitstream filters which were enabled at
3936
 * configuration time. If you do not call this function you can select exactly
3937
 * which formats you want to support, by using the individual registration
3938
 * functions.
3939
 *
3940
 * @see avcodec_register
3941
 * @see av_register_codec_parser
3942
 * @see av_register_bitstream_filter
3943
 */
3944
void avcodec_register_all(void);
3945

    
3946
/**
3947
 * Flush buffers, should be called when seeking or when switching to a different stream.
3948
 */
3949
void avcodec_flush_buffers(AVCodecContext *avctx);
3950

    
3951
void avcodec_default_free_buffers(AVCodecContext *s);
3952

    
3953
/* misc useful functions */
3954

    
3955
/**
3956
 * Return a single letter to describe the given picture type pict_type.
3957
 *
3958
 * @param[in] pict_type the picture type
3959
 * @return A single character representing the picture type.
3960
 */
3961
char av_get_pict_type_char(int pict_type);
3962

    
3963
/**
3964
 * Return codec bits per sample.
3965
 *
3966
 * @param[in] codec_id the codec
3967
 * @return Number of bits per sample or zero if unknown for the given codec.
3968
 */
3969
int av_get_bits_per_sample(enum CodecID codec_id);
3970

    
3971
#if FF_API_OLD_SAMPLE_FMT
3972
/**
3973
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3974
 */
3975
attribute_deprecated
3976
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3977
#endif
3978

    
3979
/* frame parsing */
3980
typedef struct AVCodecParserContext {
3981
    void *priv_data;
3982
    struct AVCodecParser *parser;
3983
    int64_t frame_offset; /* offset of the current frame */
3984
    int64_t cur_offset; /* current offset
3985
                           (incremented by each av_parser_parse()) */
3986
    int64_t next_frame_offset; /* offset of the next frame */
3987
    /* video info */
3988
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3989
    /**
3990
     * This field is used for proper frame duration computation in lavf.
3991
     * It signals, how much longer the frame duration of the current frame
3992
     * is compared to normal frame duration.
3993
     *
3994
     * frame_duration = (1 + repeat_pict) * time_base
3995
     *
3996
     * It is used by codecs like H.264 to display telecined material.
3997
     */
3998
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3999
    int64_t pts;     /* pts of the current frame */
4000
    int64_t dts;     /* dts of the current frame */
4001

    
4002
    /* private data */
4003
    int64_t last_pts;
4004
    int64_t last_dts;
4005
    int fetch_timestamp;
4006

    
4007
#define AV_PARSER_PTS_NB 4
4008
    int cur_frame_start_index;
4009
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
4010
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
4011
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
4012

    
4013
    int flags;
4014
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
4015
#define PARSER_FLAG_ONCE                      0x0002
4016
/// Set if the parser has a valid file offset
4017
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
4018

    
4019
    int64_t offset;      ///< byte offset from starting packet start
4020
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
4021

    
4022
    /*!
4023
     * Set by parser to 1 for key frames and 0 for non-key frames.
4024
     * It is initialized to -1, so if the parser doesn't set this flag,
4025
     * old-style fallback using FF_I_TYPE picture type as key frames
4026
     * will be used.
4027
     */
4028
    int key_frame;
4029

    
4030
    /**
4031
     * Time difference in stream time base units from the pts of this
4032
     * packet to the point at which the output from the decoder has converged
4033
     * independent from the availability of previous frames. That is, the
4034
     * frames are virtually identical no matter if decoding started from
4035
     * the very first frame or from this keyframe.
4036
     * Is AV_NOPTS_VALUE if unknown.
4037
     * This field is not the display duration of the current frame.
4038
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
4039
     * set.
4040
     *
4041
     * The purpose of this field is to allow seeking in streams that have no
4042
     * keyframes in the conventional sense. It corresponds to the
4043
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
4044
     * essential for some types of subtitle streams to ensure that all
4045
     * subtitles are correctly displayed after seeking.
4046
     */
4047
    int64_t convergence_duration;
4048

    
4049
    // Timestamp generation support:
4050
    /**
4051
     * Synchronization point for start of timestamp generation.
4052
     *
4053
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
4054
     * (default).
4055
     *
4056
     * For example, this corresponds to presence of H.264 buffering period
4057
     * SEI message.
4058
     */
4059
    int dts_sync_point;
4060

    
4061
    /**
4062
     * Offset of the current timestamp against last timestamp sync point in
4063
     * units of AVCodecContext.time_base.
4064
     *
4065
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4066
     * contain a valid timestamp offset.
4067
     *
4068
     * Note that the timestamp of sync point has usually a nonzero
4069
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
4070
     * the next frame after timestamp sync point will be usually 1.
4071
     *
4072
     * For example, this corresponds to H.264 cpb_removal_delay.
4073
     */
4074
    int dts_ref_dts_delta;
4075

    
4076
    /**
4077
     * Presentation delay of current frame in units of AVCodecContext.time_base.
4078
     *
4079
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4080
     * contain valid non-negative timestamp delta (presentation time of a frame
4081
     * must not lie in the past).
4082
     *
4083
     * This delay represents the difference between decoding and presentation
4084
     * time of the frame.
4085
     *
4086
     * For example, this corresponds to H.264 dpb_output_delay.
4087
     */
4088
    int pts_dts_delta;
4089

    
4090
    /**
4091
     * Position of the packet in file.
4092
     *
4093
     * Analogous to cur_frame_pts/dts
4094
     */
4095
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
4096

    
4097
    /**
4098
     * Byte position of currently parsed frame in stream.
4099
     */
4100
    int64_t pos;
4101

    
4102
    /**
4103
     * Previous frame byte position.
4104
     */
4105
    int64_t last_pos;
4106
} AVCodecParserContext;
4107

    
4108
typedef struct AVCodecParser {
4109
    int codec_ids[5]; /* several codec IDs are permitted */
4110
    int priv_data_size;
4111
    int (*parser_init)(AVCodecParserContext *s);
4112
    int (*parser_parse)(AVCodecParserContext *s,
4113
                        AVCodecContext *avctx,
4114
                        const uint8_t **poutbuf, int *poutbuf_size,
4115
                        const uint8_t *buf, int buf_size);
4116
    void (*parser_close)(AVCodecParserContext *s);
4117
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
4118
    struct AVCodecParser *next;
4119
} AVCodecParser;
4120

    
4121
AVCodecParser *av_parser_next(AVCodecParser *c);
4122

    
4123
void av_register_codec_parser(AVCodecParser *parser);
4124
AVCodecParserContext *av_parser_init(int codec_id);
4125

    
4126
#if LIBAVCODEC_VERSION_MAJOR < 53
4127
attribute_deprecated
4128
int av_parser_parse(AVCodecParserContext *s,
4129
                    AVCodecContext *avctx,
4130
                    uint8_t **poutbuf, int *poutbuf_size,
4131
                    const uint8_t *buf, int buf_size,
4132
                    int64_t pts, int64_t dts);
4133
#endif
4134

    
4135
/**
4136
 * Parse a packet.
4137
 *
4138
 * @param s             parser context.
4139
 * @param avctx         codec context.
4140
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4141
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4142
 * @param buf           input buffer.
4143
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4144
 * @param pts           input presentation timestamp.
4145
 * @param dts           input decoding timestamp.
4146
 * @param pos           input byte position in stream.
4147
 * @return the number of bytes of the input bitstream used.
4148
 *
4149
 * Example:
4150
 * @code
4151
 *   while(in_len){
4152
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4153
 *                                        in_data, in_len,
4154
 *                                        pts, dts, pos);
4155
 *       in_data += len;
4156
 *       in_len  -= len;
4157
 *
4158
 *       if(size)
4159
 *          decode_frame(data, size);
4160
 *   }
4161
 * @endcode
4162
 */
4163
int av_parser_parse2(AVCodecParserContext *s,
4164
                     AVCodecContext *avctx,
4165
                     uint8_t **poutbuf, int *poutbuf_size,
4166
                     const uint8_t *buf, int buf_size,
4167
                     int64_t pts, int64_t dts,
4168
                     int64_t pos);
4169

    
4170
int av_parser_change(AVCodecParserContext *s,
4171
                     AVCodecContext *avctx,
4172
                     uint8_t **poutbuf, int *poutbuf_size,
4173
                     const uint8_t *buf, int buf_size, int keyframe);
4174
void av_parser_close(AVCodecParserContext *s);
4175

    
4176

    
4177
typedef struct AVBitStreamFilterContext {
4178
    void *priv_data;
4179
    struct AVBitStreamFilter *filter;
4180
    AVCodecParserContext *parser;
4181
    struct AVBitStreamFilterContext *next;
4182
} AVBitStreamFilterContext;
4183

    
4184

    
4185
typedef struct AVBitStreamFilter {
4186
    const char *name;
4187
    int priv_data_size;
4188
    int (*filter)(AVBitStreamFilterContext *bsfc,
4189
                  AVCodecContext *avctx, const char *args,
4190
                  uint8_t **poutbuf, int *poutbuf_size,
4191
                  const uint8_t *buf, int buf_size, int keyframe);
4192
    void (*close)(AVBitStreamFilterContext *bsfc);
4193
    struct AVBitStreamFilter *next;
4194
} AVBitStreamFilter;
4195

    
4196
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4197
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4198
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4199
                               AVCodecContext *avctx, const char *args,
4200
                               uint8_t **poutbuf, int *poutbuf_size,
4201
                               const uint8_t *buf, int buf_size, int keyframe);
4202
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4203

    
4204
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4205

    
4206
/* memory */
4207

    
4208
/**
4209
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4210
 *
4211
 * @see av_realloc
4212
 */
4213
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4214

    
4215
/**
4216
 * Allocate a buffer, reusing the given one if large enough.
4217
 *
4218
 * Contrary to av_fast_realloc the current buffer contents might not be
4219
 * preserved and on error the old buffer is freed, thus no special
4220
 * handling to avoid memleaks is necessary.
4221
 *
4222
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4223
 * @param size size of the buffer *ptr points to
4224
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4225
 *                 *size 0 if an error occurred.
4226
 */
4227
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4228

    
4229
#if LIBAVCODEC_VERSION_MAJOR < 53
4230
/**
4231
 * @deprecated Deprecated in favor of av_image_copy().
4232
 */
4233
attribute_deprecated
4234
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4235
                          uint8_t *src_data[4], int src_linesize[4],
4236
                          enum PixelFormat pix_fmt, int width, int height);
4237
#endif
4238

    
4239
/**
4240
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4241
 */
4242
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4243
                     enum PixelFormat pix_fmt, int width, int height);
4244

    
4245
/**
4246
 * Crop image top and left side.
4247
 */
4248
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4249
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4250

    
4251
/**
4252
 * Pad image.
4253
 */
4254
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4255
            int padtop, int padbottom, int padleft, int padright, int *color);
4256

    
4257
/**
4258
 * Encode extradata length to a buffer. Used by xiph codecs.
4259
 *
4260
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4261
 * @param v size of extradata in bytes
4262
 * @return number of bytes written to the buffer.
4263
 */
4264
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4265

    
4266
#if LIBAVCODEC_VERSION_MAJOR < 53
4267
/**
4268
 * Parse str and put in width_ptr and height_ptr the detected values.
4269
 *
4270
 * @deprecated Deprecated in favor of av_parse_video_size().
4271
 */
4272
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4273

    
4274
/**
4275
 * Parse str and store the detected values in *frame_rate.
4276
 *
4277
 * @deprecated Deprecated in favor of av_parse_video_rate().
4278
 */
4279
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4280
#endif
4281

    
4282
/**
4283
 * Logs a generic warning message about a missing feature. This function is
4284
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4285
 * only, and would normally not be used by applications.
4286
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4287
 * a pointer to an AVClass struct
4288
 * @param[in] feature string containing the name of the missing feature
4289
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4290
 * If want_sample is non-zero, additional verbage will be added to the log
4291
 * message which tells the user how to report samples to the development
4292
 * mailing list.
4293
 */
4294
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4295

    
4296
/**
4297
 * Log a generic warning message asking for a sample. This function is
4298
 * intended to be used internally by Libav (libavcodec, libavformat, etc.)
4299
 * only, and would normally not be used by applications.
4300
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4301
 * a pointer to an AVClass struct
4302
 * @param[in] msg string containing an optional message, or NULL if no message
4303
 */
4304
void av_log_ask_for_sample(void *avc, const char *msg);
4305

    
4306
/**
4307
 * Register the hardware accelerator hwaccel.
4308
 */
4309
void av_register_hwaccel(AVHWAccel *hwaccel);
4310

    
4311
/**
4312
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4313
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4314
 * after hwaccel, or NULL if hwaccel is the last one.
4315
 */
4316
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4317

    
4318

    
4319
/**
4320
 * Lock operation used by lockmgr
4321
 */
4322
enum AVLockOp {
4323
  AV_LOCK_CREATE,  ///< Create a mutex
4324
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4325
  AV_LOCK_RELEASE, ///< Unlock the mutex
4326
  AV_LOCK_DESTROY, ///< Free mutex resources
4327
};
4328

    
4329
/**
4330
 * Register a user provided lock manager supporting the operations
4331
 * specified by AVLockOp. mutex points to a (void *) where the
4332
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4333
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4334
 *
4335
 * @param cb User defined callback. Note: Libav may invoke calls to this
4336
 *           callback during the call to av_lockmgr_register().
4337
 *           Thus, the application must be prepared to handle that.
4338
 *           If cb is set to NULL the lockmgr will be unregistered.
4339
 *           Also note that during unregistration the previously registered
4340
 *           lockmgr callback may also be invoked.
4341
 */
4342
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4343

    
4344
#endif /* AVCODEC_AVCODEC_H */