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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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 * @file
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 * external API header
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 */
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#include <errno.h>
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#include "libavcore/samplefmt.h"
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#include "libavutil/avutil.h"
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#include "libavutil/cpu.h"
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#define LIBAVCODEC_VERSION_MAJOR 52
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#define LIBAVCODEC_VERSION_MINOR 110
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#define LIBAVCODEC_VERSION_MICRO  0
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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                                               LIBAVCODEC_VERSION_MINOR, \
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                                               LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
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                                           LIBAVCODEC_VERSION_MINOR,    \
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                                           LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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/**
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 * Those FF_API_* defines are not part of public API.
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 * They may change, break or disappear at any time.
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 */
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#ifndef FF_API_PALETTE_CONTROL
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#define FF_API_PALETTE_CONTROL  (LIBAVCODEC_VERSION_MAJOR < 54)
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#endif
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#ifndef FF_API_MM_FLAGS
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#define FF_API_MM_FLAGS         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OPT_SHOW
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#define FF_API_OPT_SHOW         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_AUDIO_OLD
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#define FF_API_AUDIO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_VIDEO_OLD
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#define FF_API_VIDEO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SUBTITLE_OLD
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#define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_USE_LPC
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#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SET_STRING_OLD
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#define FF_API_SET_STRING_OLD   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_INOFFICIAL
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#define FF_API_INOFFICIAL       (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_SAMPLE_FMT
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#define FF_API_OLD_SAMPLE_FMT   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_AUDIOCONVERT
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#define FF_API_OLD_AUDIOCONVERT (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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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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    /* 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 "libavcore/audioconvert.h"
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/* Audio channel masks */
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#define CH_FRONT_LEFT            AV_CH_FRONT_LEFT
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#define CH_FRONT_RIGHT           AV_CH_FRONT_RIGHT
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#define CH_FRONT_CENTER          AV_CH_FRONT_CENTER
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#define CH_LOW_FREQUENCY         AV_CH_LOW_FREQUENCY
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#define CH_BACK_LEFT             AV_CH_BACK_LEFT
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#define CH_BACK_RIGHT            AV_CH_BACK_RIGHT
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#define CH_FRONT_LEFT_OF_CENTER  AV_CH_FRONT_LEFT_OF_CENTER
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#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
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#define CH_BACK_CENTER           AV_CH_BACK_CENTER
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#define CH_SIDE_LEFT             AV_CH_SIDE_LEFT
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#define CH_SIDE_RIGHT            AV_CH_SIDE_RIGHT
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#define CH_TOP_CENTER            AV_CH_TOP_CENTER
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#define CH_TOP_FRONT_LEFT        AV_CH_TOP_FRONT_LEFT
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#define CH_TOP_FRONT_CENTER      AV_CH_TOP_FRONT_CENTER
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#define CH_TOP_FRONT_RIGHT       AV_CH_TOP_FRONT_RIGHT
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#define CH_TOP_BACK_LEFT         AV_CH_TOP_BACK_LEFT
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#define CH_TOP_BACK_CENTER       AV_CH_TOP_BACK_CENTER
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#define CH_TOP_BACK_RIGHT        AV_CH_TOP_BACK_RIGHT
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#define CH_STEREO_LEFT           AV_CH_STEREO_LEFT
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#define CH_STEREO_RIGHT          AV_CH_STEREO_RIGHT
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/** Channel mask value used for AVCodecContext.request_channel_layout
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    to indicate that the user requests the channel order of the decoder output
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    to be the native codec channel order. */
467
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
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#define CH_LAYOUT_MONO           AV_CH_LAYOUT_MONO
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#define CH_LAYOUT_STEREO         AV_CH_LAYOUT_STEREO
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#define CH_LAYOUT_2_1            AV_CH_LAYOUT_2_1
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#define CH_LAYOUT_SURROUND       AV_CH_LAYOUT_SURROUND
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#define CH_LAYOUT_4POINT0        AV_CH_LAYOUT_4POINT0
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#define CH_LAYOUT_2_2            AV_CH_LAYOUT_2_2
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#define CH_LAYOUT_QUAD           AV_CH_LAYOUT_QUAD
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#define CH_LAYOUT_5POINT0        AV_CH_LAYOUT_5POINT0
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#define CH_LAYOUT_5POINT1        AV_CH_LAYOUT_5POINT1
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#define CH_LAYOUT_5POINT0_BACK   AV_CH_LAYOUT_5POINT0_BACK
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#define CH_LAYOUT_5POINT1_BACK   AV_CH_LAYOUT_5POINT1_BACK
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#define CH_LAYOUT_7POINT0        AV_CH_LAYOUT_7POINT0
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#define CH_LAYOUT_7POINT1        AV_CH_LAYOUT_7POINT1
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#define CH_LAYOUT_7POINT1_WIDE   AV_CH_LAYOUT_7POINT1_WIDE
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#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
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#endif
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/* in bytes */
488
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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490
/**
491
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
492
 * This is mainly needed because some optimized bitstream readers read
493
 * 32 or 64 bit at once and could read over the end.<br>
494
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
495
 * MPEG bitstreams could cause overread and segfault.
496
 */
497
#define FF_INPUT_BUFFER_PADDING_SIZE 8
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499
/**
500
 * minimum encoding buffer size
501
 * Used to avoid some checks during header writing.
502
 */
503
#define FF_MIN_BUFFER_SIZE 16384
504

    
505

    
506
/**
507
 * motion estimation type.
508
 */
509
enum Motion_Est_ID {
510
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
511
    ME_FULL,
512
    ME_LOG,
513
    ME_PHODS,
514
    ME_EPZS,        ///< enhanced predictive zonal search
515
    ME_X1,          ///< reserved for experiments
516
    ME_HEX,         ///< hexagon based search
517
    ME_UMH,         ///< uneven multi-hexagon search
518
    ME_ITER,        ///< iterative search
519
    ME_TESA,        ///< transformed exhaustive search algorithm
520
};
521

    
522
enum AVDiscard{
523
    /* We leave some space between them for extensions (drop some
524
     * keyframes for intra-only or drop just some bidir frames). */
525
    AVDISCARD_NONE   =-16, ///< discard nothing
526
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
527
    AVDISCARD_NONREF =  8, ///< discard all non reference
528
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
529
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
530
    AVDISCARD_ALL    = 48, ///< discard all
531
};
532

    
533
enum AVColorPrimaries{
534
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
535
    AVCOL_PRI_UNSPECIFIED=2,
536
    AVCOL_PRI_BT470M     =4,
537
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
538
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
539
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
540
    AVCOL_PRI_FILM       =8,
541
    AVCOL_PRI_NB           , ///< Not part of ABI
542
};
543

    
544
enum AVColorTransferCharacteristic{
545
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
546
    AVCOL_TRC_UNSPECIFIED=2,
547
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
548
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
549
    AVCOL_TRC_NB           , ///< Not part of ABI
550
};
551

    
552
enum AVColorSpace{
553
    AVCOL_SPC_RGB        =0,
554
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
555
    AVCOL_SPC_UNSPECIFIED=2,
556
    AVCOL_SPC_FCC        =4,
557
    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
558
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
559
    AVCOL_SPC_SMPTE240M  =7,
560
    AVCOL_SPC_NB           , ///< Not part of ABI
561
};
562

    
563
enum AVColorRange{
564
    AVCOL_RANGE_UNSPECIFIED=0,
565
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
566
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
567
    AVCOL_RANGE_NB           , ///< Not part of ABI
568
};
569

    
570
/**
571
 *  X   X      3 4 X      X are luma samples,
572
 *             1 2        1-6 are possible chroma positions
573
 *  X   X      5 6 X      0 is undefined/unknown position
574
 */
575
enum AVChromaLocation{
576
    AVCHROMA_LOC_UNSPECIFIED=0,
577
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
578
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
579
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
580
    AVCHROMA_LOC_TOP        =4,
581
    AVCHROMA_LOC_BOTTOMLEFT =5,
582
    AVCHROMA_LOC_BOTTOM     =6,
583
    AVCHROMA_LOC_NB           , ///< Not part of ABI
584
};
585

    
586
/**
587
 * LPC analysis type
588
 */
589
enum AVLPCType {
590
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
591
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
592
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
593
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
594
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
595
    AV_LPC_TYPE_NB              , ///< Not part of ABI
596
};
597

    
598
typedef struct RcOverride{
599
    int start_frame;
600
    int end_frame;
601
    int qscale; // If this is 0 then quality_factor will be used instead.
602
    float quality_factor;
603
} RcOverride;
604

    
605
#define FF_MAX_B_FRAMES 16
606

    
607
/* encoding support
608
   These flags can be passed in AVCodecContext.flags before initialization.
609
   Note: Not everything is supported yet.
610
*/
611

    
612
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
613
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
614
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
615
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
616
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
617
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
618
/**
619
 * The parent program guarantees that the input for B-frames containing
620
 * streams is not written to for at least s->max_b_frames+1 frames, if
621
 * this is not set the input will be copied.
622
 */
623
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
624
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
625
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
626
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
627
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
628
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
629
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
630
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
631
                                                  location instead of only at frame boundaries. */
632
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
633
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
634
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
635
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
636
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
637
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
638
/* Fx : Flag for h263+ extra options */
639
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
640
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
641
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
642
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
643
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
644
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
645
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
646
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
647
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
648
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
649
#define CODEC_FLAG_CLOSED_GOP     0x80000000
650
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
651
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
652
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
653
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
654
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
655
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
656
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
657
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
658
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
659
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
660
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
661
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
662
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
663
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
664
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
665
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
666
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
667
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
668
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
669
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
670
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
671
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
672

    
673
/* Unsupported options :
674
 *              Syntax Arithmetic coding (SAC)
675
 *              Reference Picture Selection
676
 *              Independent Segment Decoding */
677
/* /Fx */
678
/* codec capabilities */
679

    
680
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
681
/**
682
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
683
 * If not set, it might not use get_buffer() at all or use operations that
684
 * assume the buffer was allocated by avcodec_default_get_buffer.
685
 */
686
#define CODEC_CAP_DR1             0x0002
687
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
688
#define CODEC_CAP_PARSE_ONLY      0x0004
689
#define CODEC_CAP_TRUNCATED       0x0008
690
/* Codec can export data for HW decoding (XvMC). */
691
#define CODEC_CAP_HWACCEL         0x0010
692
/**
693
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
694
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
695
 */
696
#define CODEC_CAP_DELAY           0x0020
697
/**
698
 * Codec can be fed a final frame with a smaller size.
699
 * This can be used to prevent truncation of the last audio samples.
700
 */
701
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
702
/**
703
 * Codec can export data for HW decoding (VDPAU).
704
 */
705
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
706
/**
707
 * Codec can output multiple frames per AVPacket
708
 * Normally demuxers return one frame at a time, demuxers which do not do
709
 * are connected to a parser to split what they return into proper frames.
710
 * This flag is reserved to the very rare category of codecs which have a
711
 * bitstream that cannot be split into frames without timeconsuming
712
 * operations like full decoding. Demuxers carring such bitstreams thus
713
 * may return multiple frames in a packet. This has many disadvantages like
714
 * prohibiting stream copy in many cases thus it should only be considered
715
 * as a last resort.
716
 */
717
#define CODEC_CAP_SUBFRAMES        0x0100
718
/**
719
 * Codec is experimental and is thus avoided in favor of non experimental
720
 * encoders
721
 */
722
#define CODEC_CAP_EXPERIMENTAL     0x0200
723
/**
724
 * Codec should fill in channel configuration and samplerate instead of container
725
 */
726
#define CODEC_CAP_CHANNEL_CONF     0x0400
727
/**
728
 * Codec is able to deal with negative linesizes
729
 */
730
#define CODEC_CAP_NEG_LINESIZES    0x0800
731

    
732
//The following defines may change, don't expect compatibility if you use them.
733
#define MB_TYPE_INTRA4x4   0x0001
734
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
735
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
736
#define MB_TYPE_16x16      0x0008
737
#define MB_TYPE_16x8       0x0010
738
#define MB_TYPE_8x16       0x0020
739
#define MB_TYPE_8x8        0x0040
740
#define MB_TYPE_INTERLACED 0x0080
741
#define MB_TYPE_DIRECT2    0x0100 //FIXME
742
#define MB_TYPE_ACPRED     0x0200
743
#define MB_TYPE_GMC        0x0400
744
#define MB_TYPE_SKIP       0x0800
745
#define MB_TYPE_P0L0       0x1000
746
#define MB_TYPE_P1L0       0x2000
747
#define MB_TYPE_P0L1       0x4000
748
#define MB_TYPE_P1L1       0x8000
749
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
750
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
751
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
752
#define MB_TYPE_QUANT      0x00010000
753
#define MB_TYPE_CBP        0x00020000
754
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
755

    
756
/**
757
 * Pan Scan area.
758
 * This specifies the area which should be displayed.
759
 * Note there may be multiple such areas for one frame.
760
 */
761
typedef struct AVPanScan{
762
    /**
763
     * id
764
     * - encoding: Set by user.
765
     * - decoding: Set by libavcodec.
766
     */
767
    int id;
768

    
769
    /**
770
     * width and height in 1/16 pel
771
     * - encoding: Set by user.
772
     * - decoding: Set by libavcodec.
773
     */
774
    int width;
775
    int height;
776

    
777
    /**
778
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
779
     * - encoding: Set by user.
780
     * - decoding: Set by libavcodec.
781
     */
782
    int16_t position[3][2];
783
}AVPanScan;
784

    
785
#define FF_COMMON_FRAME \
786
    /**\
787
     * pointer to the picture planes.\
788
     * This might be different from the first allocated byte\
789
     * - encoding: \
790
     * - decoding: \
791
     */\
792
    uint8_t *data[4];\
793
    int linesize[4];\
794
    /**\
795
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
796
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
797
     * - encoding: \
798
     * - decoding: \
799
     */\
800
    uint8_t *base[4];\
801
    /**\
802
     * 1 -> keyframe, 0-> not\
803
     * - encoding: Set by libavcodec.\
804
     * - decoding: Set by libavcodec.\
805
     */\
806
    int key_frame;\
807
\
808
    /**\
809
     * Picture type of the frame, see ?_TYPE below.\
810
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
811
     * - decoding: Set by libavcodec.\
812
     */\
813
    int pict_type;\
814
\
815
    /**\
816
     * presentation timestamp in time_base units (time when frame should be shown to user)\
817
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
818
     * - encoding: MUST be set by user.\
819
     * - decoding: Set by libavcodec.\
820
     */\
821
    int64_t pts;\
822
\
823
    /**\
824
     * picture number in bitstream order\
825
     * - encoding: set by\
826
     * - decoding: Set by libavcodec.\
827
     */\
828
    int coded_picture_number;\
829
    /**\
830
     * picture number in display order\
831
     * - encoding: set by\
832
     * - decoding: Set by libavcodec.\
833
     */\
834
    int display_picture_number;\
835
\
836
    /**\
837
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
838
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
839
     * - decoding: Set by libavcodec.\
840
     */\
841
    int quality; \
842
\
843
    /**\
844
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
845
     * Set to INT_MAX if the buffer has not been used yet.\
846
     * - encoding: unused\
847
     * - decoding: MUST be set by get_buffer().\
848
     */\
849
    int age;\
850
\
851
    /**\
852
     * is this picture used as reference\
853
     * The values for this are the same as the MpegEncContext.picture_structure\
854
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
855
     * Set to 4 for delayed, non-reference frames.\
856
     * - encoding: unused\
857
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
858
     */\
859
    int reference;\
860
\
861
    /**\
862
     * QP table\
863
     * - encoding: unused\
864
     * - decoding: Set by libavcodec.\
865
     */\
866
    int8_t *qscale_table;\
867
    /**\
868
     * QP store stride\
869
     * - encoding: unused\
870
     * - decoding: Set by libavcodec.\
871
     */\
872
    int qstride;\
873
\
874
    /**\
875
     * mbskip_table[mb]>=1 if MB didn't change\
876
     * stride= mb_width = (width+15)>>4\
877
     * - encoding: unused\
878
     * - decoding: Set by libavcodec.\
879
     */\
880
    uint8_t *mbskip_table;\
881
\
882
    /**\
883
     * motion vector table\
884
     * @code\
885
     * example:\
886
     * int mv_sample_log2= 4 - motion_subsample_log2;\
887
     * int mb_width= (width+15)>>4;\
888
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
889
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
890
     * @endcode\
891
     * - encoding: Set by user.\
892
     * - decoding: Set by libavcodec.\
893
     */\
894
    int16_t (*motion_val[2])[2];\
895
\
896
    /**\
897
     * macroblock type table\
898
     * mb_type_base + mb_width + 2\
899
     * - encoding: Set by user.\
900
     * - decoding: Set by libavcodec.\
901
     */\
902
    uint32_t *mb_type;\
903
\
904
    /**\
905
     * log2 of the size of the block which a single vector in motion_val represents: \
906
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
907
     * - encoding: unused\
908
     * - decoding: Set by libavcodec.\
909
     */\
910
    uint8_t motion_subsample_log2;\
911
\
912
    /**\
913
     * for some private data of the user\
914
     * - encoding: unused\
915
     * - decoding: Set by user.\
916
     */\
917
    void *opaque;\
918
\
919
    /**\
920
     * error\
921
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
922
     * - decoding: unused\
923
     */\
924
    uint64_t error[4];\
925
\
926
    /**\
927
     * type of the buffer (to keep track of who has to deallocate data[*])\
928
     * - encoding: Set by the one who allocates it.\
929
     * - decoding: Set by the one who allocates it.\
930
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
931
     */\
932
    int type;\
933
    \
934
    /**\
935
     * When decoding, this signals how much the picture must be delayed.\
936
     * extra_delay = repeat_pict / (2*fps)\
937
     * - encoding: unused\
938
     * - decoding: Set by libavcodec.\
939
     */\
940
    int repeat_pict;\
941
    \
942
    /**\
943
     * \
944
     */\
945
    int qscale_type;\
946
    \
947
    /**\
948
     * The content of the picture is interlaced.\
949
     * - encoding: Set by user.\
950
     * - decoding: Set by libavcodec. (default 0)\
951
     */\
952
    int interlaced_frame;\
953
    \
954
    /**\
955
     * If the content is interlaced, is top field displayed first.\
956
     * - encoding: Set by user.\
957
     * - decoding: Set by libavcodec.\
958
     */\
959
    int top_field_first;\
960
    \
961
    /**\
962
     * Pan scan.\
963
     * - encoding: Set by user.\
964
     * - decoding: Set by libavcodec.\
965
     */\
966
    AVPanScan *pan_scan;\
967
    \
968
    /**\
969
     * Tell user application that palette has changed from previous frame.\
970
     * - encoding: ??? (no palette-enabled encoder yet)\
971
     * - decoding: Set by libavcodec. (default 0).\
972
     */\
973
    int palette_has_changed;\
974
    \
975
    /**\
976
     * codec suggestion on buffer type if != 0\
977
     * - encoding: unused\
978
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
979
     */\
980
    int buffer_hints;\
981
\
982
    /**\
983
     * DCT coefficients\
984
     * - encoding: unused\
985
     * - decoding: Set by libavcodec.\
986
     */\
987
    short *dct_coeff;\
988
\
989
    /**\
990
     * motion reference frame index\
991
     * the order in which these are stored can depend on the codec.\
992
     * - encoding: Set by user.\
993
     * - decoding: Set by libavcodec.\
994
     */\
995
    int8_t *ref_index[2];\
996
\
997
    /**\
998
     * reordered opaque 64bit (generally an integer or a double precision float\
999
     * PTS but can be anything). \
1000
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
1001
     * that time,\
1002
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
1003
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
1004
     * @deprecated in favor of pkt_pts\
1005
     * - encoding: unused\
1006
     * - decoding: Read by user.\
1007
     */\
1008
    int64_t reordered_opaque;\
1009
\
1010
    /**\
1011
     * hardware accelerator private data (FFmpeg allocated)\
1012
     * - encoding: unused\
1013
     * - decoding: Set by libavcodec\
1014
     */\
1015
    void *hwaccel_picture_private;\
1016
\
1017
    /**\
1018
     * reordered pts from the last AVPacket that has been input into the decoder\
1019
     * - encoding: unused\
1020
     * - decoding: Read by user.\
1021
     */\
1022
    int64_t pkt_pts;\
1023
\
1024
    /**\
1025
     * dts from the last AVPacket that has been input into the decoder\
1026
     * - encoding: unused\
1027
     * - decoding: Read by user.\
1028
     */\
1029
    int64_t pkt_dts;\
1030

    
1031

    
1032
#define FF_QSCALE_TYPE_MPEG1 0
1033
#define FF_QSCALE_TYPE_MPEG2 1
1034
#define FF_QSCALE_TYPE_H264  2
1035
#define FF_QSCALE_TYPE_VP56  3
1036

    
1037
#define FF_BUFFER_TYPE_INTERNAL 1
1038
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1039
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1040
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1041

    
1042

    
1043
#define FF_I_TYPE  1 ///< Intra
1044
#define FF_P_TYPE  2 ///< Predicted
1045
#define FF_B_TYPE  3 ///< Bi-dir predicted
1046
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1047
#define FF_SI_TYPE 5 ///< Switching Intra
1048
#define FF_SP_TYPE 6 ///< Switching Predicted
1049
#define FF_BI_TYPE 7
1050

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

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

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

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

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

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

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

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

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

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

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

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

    
1211
#define FF_ASPECT_EXTENDED 15
1212

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

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

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

    
1237
    /**
1238
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1239
     * decoder to draw a horizontal band. It improves cache usage. Not
1240
     * all codecs can do that. You must check the codec capabilities
1241
     * beforehand.
1242
     * The function is also used by hardware acceleration APIs.
1243
     * It is called at least once during frame decoding to pass
1244
     * the data needed for hardware render.
1245
     * In that mode instead of pixel data, AVFrame points to
1246
     * a structure specific to the acceleration API. The application
1247
     * reads the structure and can change some fields to indicate progress
1248
     * or mark state.
1249
     * - encoding: unused
1250
     * - decoding: Set by user.
1251
     * @param height the height of the slice
1252
     * @param y the y position of the slice
1253
     * @param type 1->top field, 2->bottom field, 3->frame
1254
     * @param offset offset into the AVFrame.data from which the slice should be read
1255
     */
1256
    void (*draw_horiz_band)(struct AVCodecContext *s,
1257
                            const AVFrame *src, int offset[4],
1258
                            int y, int type, int height);
1259

    
1260
    /* audio only */
1261
    int sample_rate; ///< samples per second
1262
    int channels;    ///< number of audio channels
1263

    
1264
    /**
1265
     * audio sample format
1266
     * - encoding: Set by user.
1267
     * - decoding: Set by libavcodec.
1268
     */
1269
    enum AVSampleFormat sample_fmt;  ///< sample format
1270

    
1271
    /* The following data should not be initialized. */
1272
    /**
1273
     * Samples per packet, initialized when calling 'init'.
1274
     */
1275
    int frame_size;
1276
    int frame_number;   ///< audio or video frame number
1277
#if LIBAVCODEC_VERSION_MAJOR < 53
1278
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1279
#endif
1280

    
1281
    /**
1282
     * Number of frames the decoded output will be delayed relative to
1283
     * the encoded input.
1284
     * - encoding: Set by libavcodec.
1285
     * - decoding: unused
1286
     */
1287
    int delay;
1288

    
1289
    /* - encoding parameters */
1290
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1291
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1292

    
1293
    /**
1294
     * minimum quantizer
1295
     * - encoding: Set by user.
1296
     * - decoding: unused
1297
     */
1298
    int qmin;
1299

    
1300
    /**
1301
     * maximum quantizer
1302
     * - encoding: Set by user.
1303
     * - decoding: unused
1304
     */
1305
    int qmax;
1306

    
1307
    /**
1308
     * maximum quantizer difference between frames
1309
     * - encoding: Set by user.
1310
     * - decoding: unused
1311
     */
1312
    int max_qdiff;
1313

    
1314
    /**
1315
     * maximum number of B-frames between non-B-frames
1316
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1317
     * - encoding: Set by user.
1318
     * - decoding: unused
1319
     */
1320
    int max_b_frames;
1321

    
1322
    /**
1323
     * qscale factor between IP and B-frames
1324
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1325
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1326
     * - encoding: Set by user.
1327
     * - decoding: unused
1328
     */
1329
    float b_quant_factor;
1330

    
1331
    /** obsolete FIXME remove */
1332
    int rc_strategy;
1333
#define FF_RC_STRATEGY_XVID 1
1334

    
1335
    int b_frame_strategy;
1336

    
1337
    /**
1338
     * hurry up amount
1339
     * - encoding: unused
1340
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1341
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1342
     */
1343
    int hurry_up;
1344

    
1345
    struct AVCodec *codec;
1346

    
1347
    void *priv_data;
1348

    
1349
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1350
                            /* do its best to deliver a chunk with size     */
1351
                            /* below rtp_payload_size, the chunk will start */
1352
                            /* with a start code on some codecs like H.263. */
1353
                            /* This doesn't take account of any particular  */
1354
                            /* headers inside the transmitted RTP payload.  */
1355

    
1356

    
1357
    /* The RTP callback: This function is called    */
1358
    /* every time the encoder has a packet to send. */
1359
    /* It depends on the encoder if the data starts */
1360
    /* with a Start Code (it should). H.263 does.   */
1361
    /* mb_nb contains the number of macroblocks     */
1362
    /* encoded in the RTP payload.                  */
1363
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1364

    
1365
    /* statistics, used for 2-pass encoding */
1366
    int mv_bits;
1367
    int header_bits;
1368
    int i_tex_bits;
1369
    int p_tex_bits;
1370
    int i_count;
1371
    int p_count;
1372
    int skip_count;
1373
    int misc_bits;
1374

    
1375
    /**
1376
     * number of bits used for the previously encoded frame
1377
     * - encoding: Set by libavcodec.
1378
     * - decoding: unused
1379
     */
1380
    int frame_bits;
1381

    
1382
    /**
1383
     * Private data of the user, can be used to carry app specific stuff.
1384
     * - encoding: Set by user.
1385
     * - decoding: Set by user.
1386
     */
1387
    void *opaque;
1388

    
1389
    char codec_name[32];
1390
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1391
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1392

    
1393
    /**
1394
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1395
     * This is used to work around some encoder bugs.
1396
     * A demuxer should set this to what is stored in the field used to identify the codec.
1397
     * If there are multiple such fields in a container then the demuxer should choose the one
1398
     * which maximizes the information about the used codec.
1399
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1400
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1401
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1402
     * first.
1403
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1404
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1405
     */
1406
    unsigned int codec_tag;
1407

    
1408
    /**
1409
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1410
     * - encoding: Set by user
1411
     * - decoding: Set by user
1412
     */
1413
    int workaround_bugs;
1414
#define FF_BUG_AUTODETECT       1  ///< autodetection
1415
#define FF_BUG_OLD_MSMPEG4      2
1416
#define FF_BUG_XVID_ILACE       4
1417
#define FF_BUG_UMP4             8
1418
#define FF_BUG_NO_PADDING       16
1419
#define FF_BUG_AMV              32
1420
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1421
#define FF_BUG_QPEL_CHROMA      64
1422
#define FF_BUG_STD_QPEL         128
1423
#define FF_BUG_QPEL_CHROMA2     256
1424
#define FF_BUG_DIRECT_BLOCKSIZE 512
1425
#define FF_BUG_EDGE             1024
1426
#define FF_BUG_HPEL_CHROMA      2048
1427
#define FF_BUG_DC_CLIP          4096
1428
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1429
#define FF_BUG_TRUNCATED       16384
1430
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1431

    
1432
    /**
1433
     * luma single coefficient elimination threshold
1434
     * - encoding: Set by user.
1435
     * - decoding: unused
1436
     */
1437
    int luma_elim_threshold;
1438

    
1439
    /**
1440
     * chroma single coeff elimination threshold
1441
     * - encoding: Set by user.
1442
     * - decoding: unused
1443
     */
1444
    int chroma_elim_threshold;
1445

    
1446
    /**
1447
     * strictly follow the standard (MPEG4, ...).
1448
     * - encoding: Set by user.
1449
     * - decoding: Set by user.
1450
     * Setting this to STRICT or higher means the encoder and decoder will
1451
     * generally do stupid things, whereas setting it to unofficial or lower
1452
     * will mean the encoder might produce output that is not supported by all
1453
     * spec-compliant decoders. Decoders don't differentiate between normal,
1454
     * unofficial and experimental (that is, they always try to decode things
1455
     * when they can) unless they are explicitly asked to behave stupidly
1456
     * (=strictly conform to the specs)
1457
     */
1458
    int strict_std_compliance;
1459
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1460
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1461
#define FF_COMPLIANCE_NORMAL        0
1462
#if FF_API_INOFFICIAL
1463
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1464
#endif
1465
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1466
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1467

    
1468
    /**
1469
     * qscale offset between IP and B-frames
1470
     * - encoding: Set by user.
1471
     * - decoding: unused
1472
     */
1473
    float b_quant_offset;
1474

    
1475
    /**
1476
     * Error recognization; higher values will detect more errors but may
1477
     * misdetect some more or less valid parts as errors.
1478
     * - encoding: unused
1479
     * - decoding: Set by user.
1480
     */
1481
    int error_recognition;
1482
#define FF_ER_CAREFUL         1
1483
#define FF_ER_COMPLIANT       2
1484
#define FF_ER_AGGRESSIVE      3
1485
#define FF_ER_VERY_AGGRESSIVE 4
1486

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

    
1500
    /**
1501
     * Called to release buffers which were allocated with get_buffer.
1502
     * A released buffer can be reused in get_buffer().
1503
     * pic.data[*] must be set to NULL.
1504
     * - encoding: unused
1505
     * - decoding: Set by libavcodec, user can override.
1506
     */
1507
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1508

    
1509
    /**
1510
     * Size of the frame reordering buffer in the decoder.
1511
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1512
     * - encoding: Set by libavcodec.
1513
     * - decoding: Set by libavcodec.
1514
     */
1515
    int has_b_frames;
1516

    
1517
    /**
1518
     * number of bytes per packet if constant and known or 0
1519
     * Used by some WAV based audio codecs.
1520
     */
1521
    int block_align;
1522

    
1523
    int parse_only; /* - decoding only: If true, only parsing is done
1524
                       (function avcodec_parse_frame()). The frame
1525
                       data is returned. Only MPEG codecs support this now. */
1526

    
1527
    /**
1528
     * 0-> h263 quant 1-> mpeg quant
1529
     * - encoding: Set by user.
1530
     * - decoding: unused
1531
     */
1532
    int mpeg_quant;
1533

    
1534
    /**
1535
     * pass1 encoding statistics output buffer
1536
     * - encoding: Set by libavcodec.
1537
     * - decoding: unused
1538
     */
1539
    char *stats_out;
1540

    
1541
    /**
1542
     * pass2 encoding statistics input buffer
1543
     * Concatenated stuff from stats_out of pass1 should be placed here.
1544
     * - encoding: Allocated/set/freed by user.
1545
     * - decoding: unused
1546
     */
1547
    char *stats_in;
1548

    
1549
    /**
1550
     * ratecontrol qmin qmax limiting method
1551
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1552
     * - encoding: Set by user.
1553
     * - decoding: unused
1554
     */
1555
    float rc_qsquish;
1556

    
1557
    float rc_qmod_amp;
1558
    int rc_qmod_freq;
1559

    
1560
    /**
1561
     * ratecontrol override, see RcOverride
1562
     * - encoding: Allocated/set/freed by user.
1563
     * - decoding: unused
1564
     */
1565
    RcOverride *rc_override;
1566
    int rc_override_count;
1567

    
1568
    /**
1569
     * rate control equation
1570
     * - encoding: Set by user
1571
     * - decoding: unused
1572
     */
1573
    const char *rc_eq;
1574

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

    
1582
    /**
1583
     * minimum bitrate
1584
     * - encoding: Set by user.
1585
     * - decoding: unused
1586
     */
1587
    int rc_min_rate;
1588

    
1589
    /**
1590
     * decoder bitstream buffer size
1591
     * - encoding: Set by user.
1592
     * - decoding: unused
1593
     */
1594
    int rc_buffer_size;
1595
    float rc_buffer_aggressivity;
1596

    
1597
    /**
1598
     * qscale factor between P and I-frames
1599
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1600
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1601
     * - encoding: Set by user.
1602
     * - decoding: unused
1603
     */
1604
    float i_quant_factor;
1605

    
1606
    /**
1607
     * qscale offset between P and I-frames
1608
     * - encoding: Set by user.
1609
     * - decoding: unused
1610
     */
1611
    float i_quant_offset;
1612

    
1613
    /**
1614
     * initial complexity for pass1 ratecontrol
1615
     * - encoding: Set by user.
1616
     * - decoding: unused
1617
     */
1618
    float rc_initial_cplx;
1619

    
1620
    /**
1621
     * DCT algorithm, see FF_DCT_* below
1622
     * - encoding: Set by user.
1623
     * - decoding: unused
1624
     */
1625
    int dct_algo;
1626
#define FF_DCT_AUTO    0
1627
#define FF_DCT_FASTINT 1
1628
#define FF_DCT_INT     2
1629
#define FF_DCT_MMX     3
1630
#define FF_DCT_MLIB    4
1631
#define FF_DCT_ALTIVEC 5
1632
#define FF_DCT_FAAN    6
1633

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

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

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

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

    
1662
    /**
1663
     * darkness masking (0-> disabled)
1664
     * - encoding: Set by user.
1665
     * - decoding: unused
1666
     */
1667
    float dark_masking;
1668

    
1669
    /**
1670
     * IDCT algorithm, see FF_IDCT_* below.
1671
     * - encoding: Set by user.
1672
     * - decoding: Set by user.
1673
     */
1674
    int idct_algo;
1675
#define FF_IDCT_AUTO          0
1676
#define FF_IDCT_INT           1
1677
#define FF_IDCT_SIMPLE        2
1678
#define FF_IDCT_SIMPLEMMX     3
1679
#define FF_IDCT_LIBMPEG2MMX   4
1680
#define FF_IDCT_PS2           5
1681
#define FF_IDCT_MLIB          6
1682
#define FF_IDCT_ARM           7
1683
#define FF_IDCT_ALTIVEC       8
1684
#define FF_IDCT_SH4           9
1685
#define FF_IDCT_SIMPLEARM     10
1686
#define FF_IDCT_H264          11
1687
#define FF_IDCT_VP3           12
1688
#define FF_IDCT_IPP           13
1689
#define FF_IDCT_XVIDMMX       14
1690
#define FF_IDCT_CAVS          15
1691
#define FF_IDCT_SIMPLEARMV5TE 16
1692
#define FF_IDCT_SIMPLEARMV6   17
1693
#define FF_IDCT_SIMPLEVIS     18
1694
#define FF_IDCT_WMV2          19
1695
#define FF_IDCT_FAAN          20
1696
#define FF_IDCT_EA            21
1697
#define FF_IDCT_SIMPLENEON    22
1698
#define FF_IDCT_SIMPLEALPHA   23
1699
#define FF_IDCT_BINK          24
1700

    
1701
    /**
1702
     * slice count
1703
     * - encoding: Set by libavcodec.
1704
     * - decoding: Set by user (or 0).
1705
     */
1706
    int slice_count;
1707
    /**
1708
     * slice offsets in the frame in bytes
1709
     * - encoding: Set/allocated by libavcodec.
1710
     * - decoding: Set/allocated by user (or NULL).
1711
     */
1712
    int *slice_offset;
1713

    
1714
    /**
1715
     * error concealment flags
1716
     * - encoding: unused
1717
     * - decoding: Set by user.
1718
     */
1719
    int error_concealment;
1720
#define FF_EC_GUESS_MVS   1
1721
#define FF_EC_DEBLOCK     2
1722

    
1723
    /**
1724
     * dsp_mask could be add used to disable unwanted CPU features
1725
     * CPU features (i.e. MMX, SSE. ...)
1726
     *
1727
     * With the FORCE flag you may instead enable given CPU features.
1728
     * (Dangerous: Usable in case of misdetection, improper usage however will
1729
     * result into program crash.)
1730
     */
1731
    unsigned dsp_mask;
1732

    
1733
#if FF_API_MM_FLAGS
1734
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1735
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1736
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1737
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1738
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1739
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1740
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1741
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1742
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1743
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1744
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1745
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1746
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1747
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1748
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1749
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1750
#endif
1751

    
1752
    /**
1753
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1754
     * - encoding: Set by libavcodec.
1755
     * - decoding: Set by user.
1756
     */
1757
     int bits_per_coded_sample;
1758

    
1759
    /**
1760
     * prediction method (needed for huffyuv)
1761
     * - encoding: Set by user.
1762
     * - decoding: unused
1763
     */
1764
     int prediction_method;
1765
#define FF_PRED_LEFT   0
1766
#define FF_PRED_PLANE  1
1767
#define FF_PRED_MEDIAN 2
1768

    
1769
    /**
1770
     * sample aspect ratio (0 if unknown)
1771
     * That is the width of a pixel divided by the height of the pixel.
1772
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1773
     * - encoding: Set by user.
1774
     * - decoding: Set by libavcodec.
1775
     */
1776
    AVRational sample_aspect_ratio;
1777

    
1778
    /**
1779
     * the picture in the bitstream
1780
     * - encoding: Set by libavcodec.
1781
     * - decoding: Set by libavcodec.
1782
     */
1783
    AVFrame *coded_frame;
1784

    
1785
    /**
1786
     * debug
1787
     * - encoding: Set by user.
1788
     * - decoding: Set by user.
1789
     */
1790
    int debug;
1791
#define FF_DEBUG_PICT_INFO   1
1792
#define FF_DEBUG_RC          2
1793
#define FF_DEBUG_BITSTREAM   4
1794
#define FF_DEBUG_MB_TYPE     8
1795
#define FF_DEBUG_QP          16
1796
#define FF_DEBUG_MV          32
1797
#define FF_DEBUG_DCT_COEFF   0x00000040
1798
#define FF_DEBUG_SKIP        0x00000080
1799
#define FF_DEBUG_STARTCODE   0x00000100
1800
#define FF_DEBUG_PTS         0x00000200
1801
#define FF_DEBUG_ER          0x00000400
1802
#define FF_DEBUG_MMCO        0x00000800
1803
#define FF_DEBUG_BUGS        0x00001000
1804
#define FF_DEBUG_VIS_QP      0x00002000
1805
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1806
#define FF_DEBUG_BUFFERS     0x00008000
1807

    
1808
    /**
1809
     * debug
1810
     * - encoding: Set by user.
1811
     * - decoding: Set by user.
1812
     */
1813
    int debug_mv;
1814
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1815
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1816
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1817

    
1818
    /**
1819
     * error
1820
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1821
     * - decoding: unused
1822
     */
1823
    uint64_t error[4];
1824

    
1825
    /**
1826
     * minimum MB quantizer
1827
     * - encoding: unused
1828
     * - decoding: unused
1829
     */
1830
    int mb_qmin;
1831

    
1832
    /**
1833
     * maximum MB quantizer
1834
     * - encoding: unused
1835
     * - decoding: unused
1836
     */
1837
    int mb_qmax;
1838

    
1839
    /**
1840
     * motion estimation comparison function
1841
     * - encoding: Set by user.
1842
     * - decoding: unused
1843
     */
1844
    int me_cmp;
1845
    /**
1846
     * subpixel motion estimation comparison function
1847
     * - encoding: Set by user.
1848
     * - decoding: unused
1849
     */
1850
    int me_sub_cmp;
1851
    /**
1852
     * macroblock comparison function (not supported yet)
1853
     * - encoding: Set by user.
1854
     * - decoding: unused
1855
     */
1856
    int mb_cmp;
1857
    /**
1858
     * interlaced DCT comparison function
1859
     * - encoding: Set by user.
1860
     * - decoding: unused
1861
     */
1862
    int ildct_cmp;
1863
#define FF_CMP_SAD    0
1864
#define FF_CMP_SSE    1
1865
#define FF_CMP_SATD   2
1866
#define FF_CMP_DCT    3
1867
#define FF_CMP_PSNR   4
1868
#define FF_CMP_BIT    5
1869
#define FF_CMP_RD     6
1870
#define FF_CMP_ZERO   7
1871
#define FF_CMP_VSAD   8
1872
#define FF_CMP_VSSE   9
1873
#define FF_CMP_NSSE   10
1874
#define FF_CMP_W53    11
1875
#define FF_CMP_W97    12
1876
#define FF_CMP_DCTMAX 13
1877
#define FF_CMP_DCT264 14
1878
#define FF_CMP_CHROMA 256
1879

    
1880
    /**
1881
     * ME diamond size & shape
1882
     * - encoding: Set by user.
1883
     * - decoding: unused
1884
     */
1885
    int dia_size;
1886

    
1887
    /**
1888
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1889
     * - encoding: Set by user.
1890
     * - decoding: unused
1891
     */
1892
    int last_predictor_count;
1893

    
1894
    /**
1895
     * prepass for motion estimation
1896
     * - encoding: Set by user.
1897
     * - decoding: unused
1898
     */
1899
    int pre_me;
1900

    
1901
    /**
1902
     * motion estimation prepass comparison function
1903
     * - encoding: Set by user.
1904
     * - decoding: unused
1905
     */
1906
    int me_pre_cmp;
1907

    
1908
    /**
1909
     * ME prepass diamond size & shape
1910
     * - encoding: Set by user.
1911
     * - decoding: unused
1912
     */
1913
    int pre_dia_size;
1914

    
1915
    /**
1916
     * subpel ME quality
1917
     * - encoding: Set by user.
1918
     * - decoding: unused
1919
     */
1920
    int me_subpel_quality;
1921

    
1922
    /**
1923
     * callback to negotiate the pixelFormat
1924
     * @param fmt is the list of formats which are supported by the codec,
1925
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1926
     * The first is always the native one.
1927
     * @return the chosen format
1928
     * - encoding: unused
1929
     * - decoding: Set by user, if not set the native format will be chosen.
1930
     */
1931
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1932

    
1933
    /**
1934
     * DTG active format information (additional aspect ratio
1935
     * information only used in DVB MPEG-2 transport streams)
1936
     * 0 if not set.
1937
     *
1938
     * - encoding: unused
1939
     * - decoding: Set by decoder.
1940
     */
1941
    int dtg_active_format;
1942
#define FF_DTG_AFD_SAME         8
1943
#define FF_DTG_AFD_4_3          9
1944
#define FF_DTG_AFD_16_9         10
1945
#define FF_DTG_AFD_14_9         11
1946
#define FF_DTG_AFD_4_3_SP_14_9  13
1947
#define FF_DTG_AFD_16_9_SP_14_9 14
1948
#define FF_DTG_AFD_SP_4_3       15
1949

    
1950
    /**
1951
     * maximum motion estimation search range in subpel units
1952
     * If 0 then no limit.
1953
     *
1954
     * - encoding: Set by user.
1955
     * - decoding: unused
1956
     */
1957
    int me_range;
1958

    
1959
    /**
1960
     * intra quantizer bias
1961
     * - encoding: Set by user.
1962
     * - decoding: unused
1963
     */
1964
    int intra_quant_bias;
1965
#define FF_DEFAULT_QUANT_BIAS 999999
1966

    
1967
    /**
1968
     * inter quantizer bias
1969
     * - encoding: Set by user.
1970
     * - decoding: unused
1971
     */
1972
    int inter_quant_bias;
1973

    
1974
    /**
1975
     * color table ID
1976
     * - encoding: unused
1977
     * - decoding: Which clrtable should be used for 8bit RGB images.
1978
     *             Tables have to be stored somewhere. FIXME
1979
     */
1980
    int color_table_id;
1981

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

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

    
1994
    /**
1995
     * Global quality for codecs which cannot change it per frame.
1996
     * This should be proportional to MPEG-1/2/4 qscale.
1997
     * - encoding: Set by user.
1998
     * - decoding: unused
1999
     */
2000
    int global_quality;
2001

    
2002
#define FF_CODER_TYPE_VLC       0
2003
#define FF_CODER_TYPE_AC        1
2004
#define FF_CODER_TYPE_RAW       2
2005
#define FF_CODER_TYPE_RLE       3
2006
#define FF_CODER_TYPE_DEFLATE   4
2007
    /**
2008
     * coder type
2009
     * - encoding: Set by user.
2010
     * - decoding: unused
2011
     */
2012
    int coder_type;
2013

    
2014
    /**
2015
     * context model
2016
     * - encoding: Set by user.
2017
     * - decoding: unused
2018
     */
2019
    int context_model;
2020
#if 0
2021
    /**
2022
     *
2023
     * - encoding: unused
2024
     * - decoding: Set by user.
2025
     */
2026
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2027
#endif
2028

    
2029
    /**
2030
     * slice flags
2031
     * - encoding: unused
2032
     * - decoding: Set by user.
2033
     */
2034
    int slice_flags;
2035
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2036
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2037
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2038

    
2039
    /**
2040
     * XVideo Motion Acceleration
2041
     * - encoding: forbidden
2042
     * - decoding: set by decoder
2043
     */
2044
    int xvmc_acceleration;
2045

    
2046
    /**
2047
     * macroblock decision mode
2048
     * - encoding: Set by user.
2049
     * - decoding: unused
2050
     */
2051
    int mb_decision;
2052
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2053
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2054
#define FF_MB_DECISION_RD     2        ///< rate distortion
2055

    
2056
    /**
2057
     * custom intra quantization matrix
2058
     * - encoding: Set by user, can be NULL.
2059
     * - decoding: Set by libavcodec.
2060
     */
2061
    uint16_t *intra_matrix;
2062

    
2063
    /**
2064
     * custom inter quantization matrix
2065
     * - encoding: Set by user, can be NULL.
2066
     * - decoding: Set by libavcodec.
2067
     */
2068
    uint16_t *inter_matrix;
2069

    
2070
    /**
2071
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2072
     * This is used to work around some encoder bugs.
2073
     * - encoding: unused
2074
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2075
     */
2076
    unsigned int stream_codec_tag;
2077

    
2078
    /**
2079
     * scene change detection threshold
2080
     * 0 is default, larger means fewer detected scene changes.
2081
     * - encoding: Set by user.
2082
     * - decoding: unused
2083
     */
2084
    int scenechange_threshold;
2085

    
2086
    /**
2087
     * minimum Lagrange multipler
2088
     * - encoding: Set by user.
2089
     * - decoding: unused
2090
     */
2091
    int lmin;
2092

    
2093
    /**
2094
     * maximum Lagrange multipler
2095
     * - encoding: Set by user.
2096
     * - decoding: unused
2097
     */
2098
    int lmax;
2099

    
2100
#if FF_API_PALETTE_CONTROL
2101
    /**
2102
     * palette control structure
2103
     * - encoding: ??? (no palette-enabled encoder yet)
2104
     * - decoding: Set by user.
2105
     */
2106
    struct AVPaletteControl *palctrl;
2107
#endif
2108

    
2109
    /**
2110
     * noise reduction strength
2111
     * - encoding: Set by user.
2112
     * - decoding: unused
2113
     */
2114
    int noise_reduction;
2115

    
2116
    /**
2117
     * Called at the beginning of a frame to get cr buffer for it.
2118
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2119
     * libavcodec will pass previous buffer in pic, function should return
2120
     * same buffer or new buffer with old frame "painted" into it.
2121
     * If pic.data[0] == NULL must behave like get_buffer().
2122
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2123
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2124
     * some other means.
2125
     * - encoding: unused
2126
     * - decoding: Set by libavcodec, user can override.
2127
     */
2128
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2129

    
2130
    /**
2131
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2132
     * - encoding: Set by user.
2133
     * - decoding: unused
2134
     */
2135
    int rc_initial_buffer_occupancy;
2136

    
2137
    /**
2138
     *
2139
     * - encoding: Set by user.
2140
     * - decoding: unused
2141
     */
2142
    int inter_threshold;
2143

    
2144
    /**
2145
     * CODEC_FLAG2_*
2146
     * - encoding: Set by user.
2147
     * - decoding: Set by user.
2148
     */
2149
    int flags2;
2150

    
2151
    /**
2152
     * Simulates errors in the bitstream to test error concealment.
2153
     * - encoding: Set by user.
2154
     * - decoding: unused
2155
     */
2156
    int error_rate;
2157

    
2158
    /**
2159
     * MP3 antialias algorithm, see FF_AA_* below.
2160
     * - encoding: unused
2161
     * - decoding: Set by user.
2162
     */
2163
    int antialias_algo;
2164
#define FF_AA_AUTO    0
2165
#define FF_AA_FASTINT 1 //not implemented yet
2166
#define FF_AA_INT     2
2167
#define FF_AA_FLOAT   3
2168
    /**
2169
     * quantizer noise shaping
2170
     * - encoding: Set by user.
2171
     * - decoding: unused
2172
     */
2173
    int quantizer_noise_shaping;
2174

    
2175
    /**
2176
     * thread count
2177
     * is used to decide how many independent tasks should be passed to execute()
2178
     * - encoding: Set by user.
2179
     * - decoding: Set by user.
2180
     */
2181
    int thread_count;
2182

    
2183
    /**
2184
     * The codec may call this to execute several independent things.
2185
     * It will return only after finishing all tasks.
2186
     * The user may replace this with some multithreaded implementation,
2187
     * the default implementation will execute the parts serially.
2188
     * @param count the number of things to execute
2189
     * - encoding: Set by libavcodec, user can override.
2190
     * - decoding: Set by libavcodec, user can override.
2191
     */
2192
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2193

    
2194
    /**
2195
     * thread opaque
2196
     * Can be used by execute() to store some per AVCodecContext stuff.
2197
     * - encoding: set by execute()
2198
     * - decoding: set by execute()
2199
     */
2200
    void *thread_opaque;
2201

    
2202
    /**
2203
     * Motion estimation threshold below which no motion estimation is
2204
     * performed, but instead the user specified motion vectors are used.
2205
     *
2206
     * - encoding: Set by user.
2207
     * - decoding: unused
2208
     */
2209
     int me_threshold;
2210

    
2211
    /**
2212
     * Macroblock threshold below which the user specified macroblock types will be used.
2213
     * - encoding: Set by user.
2214
     * - decoding: unused
2215
     */
2216
     int mb_threshold;
2217

    
2218
    /**
2219
     * precision of the intra DC coefficient - 8
2220
     * - encoding: Set by user.
2221
     * - decoding: unused
2222
     */
2223
     int intra_dc_precision;
2224

    
2225
    /**
2226
     * noise vs. sse weight for the nsse comparsion function
2227
     * - encoding: Set by user.
2228
     * - decoding: unused
2229
     */
2230
     int nsse_weight;
2231

    
2232
    /**
2233
     * Number of macroblock rows at the top which are skipped.
2234
     * - encoding: unused
2235
     * - decoding: Set by user.
2236
     */
2237
     int skip_top;
2238

    
2239
    /**
2240
     * Number of macroblock rows at the bottom which are skipped.
2241
     * - encoding: unused
2242
     * - decoding: Set by user.
2243
     */
2244
     int skip_bottom;
2245

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

    
2254
#define FF_PROFILE_AAC_MAIN 0
2255
#define FF_PROFILE_AAC_LOW  1
2256
#define FF_PROFILE_AAC_SSR  2
2257
#define FF_PROFILE_AAC_LTP  3
2258

    
2259
#define FF_PROFILE_DTS         20
2260
#define FF_PROFILE_DTS_ES      30
2261
#define FF_PROFILE_DTS_96_24   40
2262
#define FF_PROFILE_DTS_HD_HRA  50
2263
#define FF_PROFILE_DTS_HD_MA   60
2264

    
2265
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2266
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2267

    
2268
#define FF_PROFILE_H264_BASELINE             66
2269
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2270
#define FF_PROFILE_H264_MAIN                 77
2271
#define FF_PROFILE_H264_EXTENDED             88
2272
#define FF_PROFILE_H264_HIGH                 100
2273
#define FF_PROFILE_H264_HIGH_10              110
2274
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2275
#define FF_PROFILE_H264_HIGH_422             122
2276
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2277
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2278
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2279
#define FF_PROFILE_H264_CAVLC_444            44
2280

    
2281
    /**
2282
     * level
2283
     * - encoding: Set by user.
2284
     * - decoding: Set by libavcodec.
2285
     */
2286
     int level;
2287
#define FF_LEVEL_UNKNOWN -99
2288

    
2289
    /**
2290
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2291
     * - encoding: unused
2292
     * - decoding: Set by user.
2293
     */
2294
     int lowres;
2295

    
2296
    /**
2297
     * Bitstream width / height, may be different from width/height if lowres
2298
     * or other things are used.
2299
     * - encoding: unused
2300
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2301
     */
2302
    int coded_width, coded_height;
2303

    
2304
    /**
2305
     * frame skip threshold
2306
     * - encoding: Set by user.
2307
     * - decoding: unused
2308
     */
2309
    int frame_skip_threshold;
2310

    
2311
    /**
2312
     * frame skip factor
2313
     * - encoding: Set by user.
2314
     * - decoding: unused
2315
     */
2316
    int frame_skip_factor;
2317

    
2318
    /**
2319
     * frame skip exponent
2320
     * - encoding: Set by user.
2321
     * - decoding: unused
2322
     */
2323
    int frame_skip_exp;
2324

    
2325
    /**
2326
     * frame skip comparison function
2327
     * - encoding: Set by user.
2328
     * - decoding: unused
2329
     */
2330
    int frame_skip_cmp;
2331

    
2332
    /**
2333
     * Border processing masking, raises the quantizer for mbs on the borders
2334
     * of the picture.
2335
     * - encoding: Set by user.
2336
     * - decoding: unused
2337
     */
2338
    float border_masking;
2339

    
2340
    /**
2341
     * minimum MB lagrange multipler
2342
     * - encoding: Set by user.
2343
     * - decoding: unused
2344
     */
2345
    int mb_lmin;
2346

    
2347
    /**
2348
     * maximum MB lagrange multipler
2349
     * - encoding: Set by user.
2350
     * - decoding: unused
2351
     */
2352
    int mb_lmax;
2353

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

    
2361
    /**
2362
     *
2363
     * - encoding: unused
2364
     * - decoding: Set by user.
2365
     */
2366
    enum AVDiscard skip_loop_filter;
2367

    
2368
    /**
2369
     *
2370
     * - encoding: unused
2371
     * - decoding: Set by user.
2372
     */
2373
    enum AVDiscard skip_idct;
2374

    
2375
    /**
2376
     *
2377
     * - encoding: unused
2378
     * - decoding: Set by user.
2379
     */
2380
    enum AVDiscard skip_frame;
2381

    
2382
    /**
2383
     *
2384
     * - encoding: Set by user.
2385
     * - decoding: unused
2386
     */
2387
    int bidir_refine;
2388

    
2389
    /**
2390
     *
2391
     * - encoding: Set by user.
2392
     * - decoding: unused
2393
     */
2394
    int brd_scale;
2395

    
2396
    /**
2397
     * constant rate factor - quality-based VBR - values ~correspond to qps
2398
     * - encoding: Set by user.
2399
     * - decoding: unused
2400
     */
2401
    float crf;
2402

    
2403
    /**
2404
     * constant quantization parameter rate control method
2405
     * - encoding: Set by user.
2406
     * - decoding: unused
2407
     */
2408
    int cqp;
2409

    
2410
    /**
2411
     * minimum GOP size
2412
     * - encoding: Set by user.
2413
     * - decoding: unused
2414
     */
2415
    int keyint_min;
2416

    
2417
    /**
2418
     * number of reference frames
2419
     * - encoding: Set by user.
2420
     * - decoding: Set by lavc.
2421
     */
2422
    int refs;
2423

    
2424
    /**
2425
     * chroma qp offset from luma
2426
     * - encoding: Set by user.
2427
     * - decoding: unused
2428
     */
2429
    int chromaoffset;
2430

    
2431
    /**
2432
     * Influences how often B-frames are used.
2433
     * - encoding: Set by user.
2434
     * - decoding: unused
2435
     */
2436
    int bframebias;
2437

    
2438
    /**
2439
     * trellis RD quantization
2440
     * - encoding: Set by user.
2441
     * - decoding: unused
2442
     */
2443
    int trellis;
2444

    
2445
    /**
2446
     * Reduce fluctuations in qp (before curve compression).
2447
     * - encoding: Set by user.
2448
     * - decoding: unused
2449
     */
2450
    float complexityblur;
2451

    
2452
    /**
2453
     * in-loop deblocking filter alphac0 parameter
2454
     * alpha is in the range -6...6
2455
     * - encoding: Set by user.
2456
     * - decoding: unused
2457
     */
2458
    int deblockalpha;
2459

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

    
2468
    /**
2469
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2470
     * - encoding: Set by user.
2471
     * - decoding: unused
2472
     */
2473
    int partitions;
2474
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2475
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2476
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2477
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2478
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2479

    
2480
    /**
2481
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2482
     * - encoding: Set by user.
2483
     * - decoding: unused
2484
     */
2485
    int directpred;
2486

    
2487
    /**
2488
     * Audio cutoff bandwidth (0 means "automatic")
2489
     * - encoding: Set by user.
2490
     * - decoding: unused
2491
     */
2492
    int cutoff;
2493

    
2494
    /**
2495
     * Multiplied by qscale for each frame and added to scene_change_score.
2496
     * - encoding: Set by user.
2497
     * - decoding: unused
2498
     */
2499
    int scenechange_factor;
2500

    
2501
    /**
2502
     *
2503
     * Note: Value depends upon the compare function used for fullpel ME.
2504
     * - encoding: Set by user.
2505
     * - decoding: unused
2506
     */
2507
    int mv0_threshold;
2508

    
2509
    /**
2510
     * Adjusts sensitivity of b_frame_strategy 1.
2511
     * - encoding: Set by user.
2512
     * - decoding: unused
2513
     */
2514
    int b_sensitivity;
2515

    
2516
    /**
2517
     * - encoding: Set by user.
2518
     * - decoding: unused
2519
     */
2520
    int compression_level;
2521
#define FF_COMPRESSION_DEFAULT -1
2522

    
2523
#if FF_API_USE_LPC
2524
    /**
2525
     * Sets whether to use LPC mode - used by FLAC encoder.
2526
     * - encoding: Set by user.
2527
     * - decoding: unused
2528
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2529
     */
2530
    int use_lpc;
2531
#endif
2532

    
2533
    /**
2534
     * LPC coefficient precision - used by FLAC encoder
2535
     * - encoding: Set by user.
2536
     * - decoding: unused
2537
     */
2538
    int lpc_coeff_precision;
2539

    
2540
    /**
2541
     * - encoding: Set by user.
2542
     * - decoding: unused
2543
     */
2544
    int min_prediction_order;
2545

    
2546
    /**
2547
     * - encoding: Set by user.
2548
     * - decoding: unused
2549
     */
2550
    int max_prediction_order;
2551

    
2552
    /**
2553
     * search method for selecting prediction order
2554
     * - encoding: Set by user.
2555
     * - decoding: unused
2556
     */
2557
    int prediction_order_method;
2558

    
2559
    /**
2560
     * - encoding: Set by user.
2561
     * - decoding: unused
2562
     */
2563
    int min_partition_order;
2564

    
2565
    /**
2566
     * - encoding: Set by user.
2567
     * - decoding: unused
2568
     */
2569
    int max_partition_order;
2570

    
2571
    /**
2572
     * GOP timecode frame start number, in non drop frame format
2573
     * - encoding: Set by user.
2574
     * - decoding: unused
2575
     */
2576
    int64_t timecode_frame_start;
2577

    
2578
#if LIBAVCODEC_VERSION_MAJOR < 53
2579
    /**
2580
     * Decoder should decode to this many channels if it can (0 for default)
2581
     * - encoding: unused
2582
     * - decoding: Set by user.
2583
     * @deprecated Deprecated in favor of request_channel_layout.
2584
     */
2585
    int request_channels;
2586
#endif
2587

    
2588
    /**
2589
     * Percentage of dynamic range compression to be applied by the decoder.
2590
     * The default value is 1.0, corresponding to full compression.
2591
     * - encoding: unused
2592
     * - decoding: Set by user.
2593
     */
2594
    float drc_scale;
2595

    
2596
    /**
2597
     * opaque 64bit number (generally a PTS) that will be reordered and
2598
     * output in AVFrame.reordered_opaque
2599
     * @deprecated in favor of pkt_pts
2600
     * - encoding: unused
2601
     * - decoding: Set by user.
2602
     */
2603
    int64_t reordered_opaque;
2604

    
2605
    /**
2606
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2607
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2608
     * - encoding: set by user.
2609
     * - decoding: set by libavcodec.
2610
     */
2611
    int bits_per_raw_sample;
2612

    
2613
    /**
2614
     * Audio channel layout.
2615
     * - encoding: set by user.
2616
     * - decoding: set by libavcodec.
2617
     */
2618
    int64_t channel_layout;
2619

    
2620
    /**
2621
     * Request decoder to use this channel layout if it can (0 for default)
2622
     * - encoding: unused
2623
     * - decoding: Set by user.
2624
     */
2625
    int64_t request_channel_layout;
2626

    
2627
    /**
2628
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2629
     * - encoding: Set by user.
2630
     * - decoding: unused.
2631
     */
2632
    float rc_max_available_vbv_use;
2633

    
2634
    /**
2635
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2636
     * - encoding: Set by user.
2637
     * - decoding: unused.
2638
     */
2639
    float rc_min_vbv_overflow_use;
2640

    
2641
    /**
2642
     * Hardware accelerator in use
2643
     * - encoding: unused.
2644
     * - decoding: Set by libavcodec
2645
     */
2646
    struct AVHWAccel *hwaccel;
2647

    
2648
    /**
2649
     * For some codecs, the time base is closer to the field rate than the frame rate.
2650
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2651
     * if no telecine is used ...
2652
     *
2653
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2654
     */
2655
    int ticks_per_frame;
2656

    
2657
    /**
2658
     * Hardware accelerator context.
2659
     * For some hardware accelerators, a global context needs to be
2660
     * provided by the user. In that case, this holds display-dependent
2661
     * data FFmpeg cannot instantiate itself. Please refer to the
2662
     * FFmpeg HW accelerator documentation to know how to fill this
2663
     * is. e.g. for VA API, this is a struct vaapi_context.
2664
     * - encoding: unused
2665
     * - decoding: Set by user
2666
     */
2667
    void *hwaccel_context;
2668

    
2669
    /**
2670
     * Chromaticity coordinates of the source primaries.
2671
     * - encoding: Set by user
2672
     * - decoding: Set by libavcodec
2673
     */
2674
    enum AVColorPrimaries color_primaries;
2675

    
2676
    /**
2677
     * Color Transfer Characteristic.
2678
     * - encoding: Set by user
2679
     * - decoding: Set by libavcodec
2680
     */
2681
    enum AVColorTransferCharacteristic color_trc;
2682

    
2683
    /**
2684
     * YUV colorspace type.
2685
     * - encoding: Set by user
2686
     * - decoding: Set by libavcodec
2687
     */
2688
    enum AVColorSpace colorspace;
2689

    
2690
    /**
2691
     * MPEG vs JPEG YUV range.
2692
     * - encoding: Set by user
2693
     * - decoding: Set by libavcodec
2694
     */
2695
    enum AVColorRange color_range;
2696

    
2697
    /**
2698
     * This defines the location of chroma samples.
2699
     * - encoding: Set by user
2700
     * - decoding: Set by libavcodec
2701
     */
2702
    enum AVChromaLocation chroma_sample_location;
2703

    
2704
    /**
2705
     * The codec may call this to execute several independent things.
2706
     * It will return only after finishing all tasks.
2707
     * The user may replace this with some multithreaded implementation,
2708
     * the default implementation will execute the parts serially.
2709
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2710
     * @param c context passed also to func
2711
     * @param count the number of things to execute
2712
     * @param arg2 argument passed unchanged to func
2713
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2714
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2715
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2716
     *             two instances of func executing at the same time will have the same threadnr.
2717
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2718
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2719
     * - encoding: Set by libavcodec, user can override.
2720
     * - decoding: Set by libavcodec, user can override.
2721
     */
2722
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2723

    
2724
    /**
2725
     * explicit P-frame weighted prediction analysis method
2726
     * 0: off
2727
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2728
     * 2: smart weighting (full fade detection analysis)
2729
     * - encoding: Set by user.
2730
     * - decoding: unused
2731
     */
2732
    int weighted_p_pred;
2733

    
2734
    /**
2735
     * AQ mode
2736
     * 0: Disabled
2737
     * 1: Variance AQ (complexity mask)
2738
     * 2: Auto-variance AQ (experimental)
2739
     * - encoding: Set by user
2740
     * - decoding: unused
2741
     */
2742
    int aq_mode;
2743

    
2744
    /**
2745
     * AQ strength
2746
     * Reduces blocking and blurring in flat and textured areas.
2747
     * - encoding: Set by user
2748
     * - decoding: unused
2749
     */
2750
    float aq_strength;
2751

    
2752
    /**
2753
     * PSY RD
2754
     * Strength of psychovisual optimization
2755
     * - encoding: Set by user
2756
     * - decoding: unused
2757
     */
2758
    float psy_rd;
2759

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

    
2768
    /**
2769
     * RC lookahead
2770
     * Number of frames for frametype and ratecontrol lookahead
2771
     * - encoding: Set by user
2772
     * - decoding: unused
2773
     */
2774
    int rc_lookahead;
2775

    
2776
    /**
2777
     * Constant rate factor maximum
2778
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2779
     * than crf_max, even if doing so would violate VBV restrictions.
2780
     * - encoding: Set by user.
2781
     * - decoding: unused
2782
     */
2783
    float crf_max;
2784

    
2785
    int log_level_offset;
2786

    
2787
    /**
2788
     * Determines which LPC analysis algorithm to use.
2789
     * - encoding: Set by user
2790
     * - decoding: unused
2791
     */
2792
    enum AVLPCType lpc_type;
2793

    
2794
    /**
2795
     * Number of passes to use for Cholesky factorization during LPC analysis
2796
     * - encoding: Set by user
2797
     * - decoding: unused
2798
     */
2799
    int lpc_passes;
2800

    
2801
    /**
2802
     * Number of slices.
2803
     * Indicates number of picture subdivisions. Used for parallelized
2804
     * decoding.
2805
     * - encoding: Set by user
2806
     * - decoding: unused
2807
     */
2808
    int slices;
2809

    
2810
    /**
2811
     * Header containing style information for text subtitles.
2812
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2813
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2814
     * the Format line following. It shouldn't include any Dialogue line.
2815
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2816
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2817
     */
2818
    uint8_t *subtitle_header;
2819
    int subtitle_header_size;
2820

    
2821
    /**
2822
     * Current packet as passed into the decoder, to avoid having
2823
     * to pass the packet into every function. Currently only valid
2824
     * inside lavc and get/release_buffer callbacks.
2825
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2826
     * - encoding: unused
2827
     */
2828
    AVPacket *pkt;
2829
} AVCodecContext;
2830

    
2831
/**
2832
 * AVProfile.
2833
 */
2834
typedef struct AVProfile {
2835
    int profile;
2836
    const char *name; ///< short name for the profile
2837
} AVProfile;
2838

    
2839
/**
2840
 * AVCodec.
2841
 */
2842
typedef struct AVCodec {
2843
    /**
2844
     * Name of the codec implementation.
2845
     * The name is globally unique among encoders and among decoders (but an
2846
     * encoder and a decoder can share the same name).
2847
     * This is the primary way to find a codec from the user perspective.
2848
     */
2849
    const char *name;
2850
    enum AVMediaType type;
2851
    enum CodecID id;
2852
    int priv_data_size;
2853
    int (*init)(AVCodecContext *);
2854
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2855
    int (*close)(AVCodecContext *);
2856
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2857
    /**
2858
     * Codec capabilities.
2859
     * see CODEC_CAP_*
2860
     */
2861
    int capabilities;
2862
    struct AVCodec *next;
2863
    /**
2864
     * Flush buffers.
2865
     * Will be called when seeking
2866
     */
2867
    void (*flush)(AVCodecContext *);
2868
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2869
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2870
    /**
2871
     * Descriptive name for the codec, meant to be more human readable than name.
2872
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2873
     */
2874
    const char *long_name;
2875
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2876
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2877
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2878
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2879
    AVClass *priv_class;                    ///< AVClass for the private context
2880
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2881
} AVCodec;
2882

    
2883
/**
2884
 * AVHWAccel.
2885
 */
2886
typedef struct AVHWAccel {
2887
    /**
2888
     * Name of the hardware accelerated codec.
2889
     * The name is globally unique among encoders and among decoders (but an
2890
     * encoder and a decoder can share the same name).
2891
     */
2892
    const char *name;
2893

    
2894
    /**
2895
     * Type of codec implemented by the hardware accelerator.
2896
     *
2897
     * See AVMEDIA_TYPE_xxx
2898
     */
2899
    enum AVMediaType type;
2900

    
2901
    /**
2902
     * Codec implemented by the hardware accelerator.
2903
     *
2904
     * See CODEC_ID_xxx
2905
     */
2906
    enum CodecID id;
2907

    
2908
    /**
2909
     * Supported pixel format.
2910
     *
2911
     * Only hardware accelerated formats are supported here.
2912
     */
2913
    enum PixelFormat pix_fmt;
2914

    
2915
    /**
2916
     * Hardware accelerated codec capabilities.
2917
     * see FF_HWACCEL_CODEC_CAP_*
2918
     */
2919
    int capabilities;
2920

    
2921
    struct AVHWAccel *next;
2922

    
2923
    /**
2924
     * Called at the beginning of each frame or field picture.
2925
     *
2926
     * Meaningful frame information (codec specific) is guaranteed to
2927
     * be parsed at this point. This function is mandatory.
2928
     *
2929
     * Note that buf can be NULL along with buf_size set to 0.
2930
     * Otherwise, this means the whole frame is available at this point.
2931
     *
2932
     * @param avctx the codec context
2933
     * @param buf the frame data buffer base
2934
     * @param buf_size the size of the frame in bytes
2935
     * @return zero if successful, a negative value otherwise
2936
     */
2937
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2938

    
2939
    /**
2940
     * Callback for each slice.
2941
     *
2942
     * Meaningful slice information (codec specific) is guaranteed to
2943
     * be parsed at this point. This function is mandatory.
2944
     *
2945
     * @param avctx the codec context
2946
     * @param buf the slice data buffer base
2947
     * @param buf_size the size of the slice in bytes
2948
     * @return zero if successful, a negative value otherwise
2949
     */
2950
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2951

    
2952
    /**
2953
     * Called at the end of each frame or field picture.
2954
     *
2955
     * The whole picture is parsed at this point and can now be sent
2956
     * to the hardware accelerator. This function is mandatory.
2957
     *
2958
     * @param avctx the codec context
2959
     * @return zero if successful, a negative value otherwise
2960
     */
2961
    int (*end_frame)(AVCodecContext *avctx);
2962

    
2963
    /**
2964
     * Size of HW accelerator private data.
2965
     *
2966
     * Private data is allocated with av_mallocz() before
2967
     * AVCodecContext.get_buffer() and deallocated after
2968
     * AVCodecContext.release_buffer().
2969
     */
2970
    int priv_data_size;
2971
} AVHWAccel;
2972

    
2973
/**
2974
 * four components are given, that's all.
2975
 * the last component is alpha
2976
 */
2977
typedef struct AVPicture {
2978
    uint8_t *data[4];
2979
    int linesize[4];       ///< number of bytes per line
2980
} AVPicture;
2981

    
2982
#if FF_API_PALETTE_CONTROL
2983
/**
2984
 * AVPaletteControl
2985
 * This structure defines a method for communicating palette changes
2986
 * between and demuxer and a decoder.
2987
 *
2988
 * @deprecated Use AVPacket to send palette changes instead.
2989
 * This is totally broken.
2990
 */
2991
#define AVPALETTE_SIZE 1024
2992
#define AVPALETTE_COUNT 256
2993
typedef struct AVPaletteControl {
2994

    
2995
    /* Demuxer sets this to 1 to indicate the palette has changed;
2996
     * decoder resets to 0. */
2997
    int palette_changed;
2998

    
2999
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3000
     * the individual palette components should be on a 8-bit scale; if
3001
     * the palette data comes from an IBM VGA native format, the component
3002
     * data is probably 6 bits in size and needs to be scaled. */
3003
    unsigned int palette[AVPALETTE_COUNT];
3004

    
3005
} AVPaletteControl attribute_deprecated;
3006
#endif
3007

    
3008
enum AVSubtitleType {
3009
    SUBTITLE_NONE,
3010

    
3011
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3012

    
3013
    /**
3014
     * Plain text, the text field must be set by the decoder and is
3015
     * authoritative. ass and pict fields may contain approximations.
3016
     */
3017
    SUBTITLE_TEXT,
3018

    
3019
    /**
3020
     * Formatted text, the ass field must be set by the decoder and is
3021
     * authoritative. pict and text fields may contain approximations.
3022
     */
3023
    SUBTITLE_ASS,
3024
};
3025

    
3026
typedef struct AVSubtitleRect {
3027
    int x;         ///< top left corner  of pict, undefined when pict is not set
3028
    int y;         ///< top left corner  of pict, undefined when pict is not set
3029
    int w;         ///< width            of pict, undefined when pict is not set
3030
    int h;         ///< height           of pict, undefined when pict is not set
3031
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3032

    
3033
    /**
3034
     * data+linesize for the bitmap of this subtitle.
3035
     * can be set for text/ass as well once they where rendered
3036
     */
3037
    AVPicture pict;
3038
    enum AVSubtitleType type;
3039

    
3040
    char *text;                     ///< 0 terminated plain UTF-8 text
3041

    
3042
    /**
3043
     * 0 terminated ASS/SSA compatible event line.
3044
     * The pressentation of this is unaffected by the other values in this
3045
     * struct.
3046
     */
3047
    char *ass;
3048
} AVSubtitleRect;
3049

    
3050
typedef struct AVSubtitle {
3051
    uint16_t format; /* 0 = graphics */
3052
    uint32_t start_display_time; /* relative to packet pts, in ms */
3053
    uint32_t end_display_time; /* relative to packet pts, in ms */
3054
    unsigned num_rects;
3055
    AVSubtitleRect **rects;
3056
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3057
} AVSubtitle;
3058

    
3059
/* packet functions */
3060

    
3061
/**
3062
 * @deprecated use NULL instead
3063
 */
3064
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3065

    
3066
/**
3067
 * Default packet destructor.
3068
 */
3069
void av_destruct_packet(AVPacket *pkt);
3070

    
3071
/**
3072
 * Initialize optional fields of a packet with default values.
3073
 *
3074
 * @param pkt packet
3075
 */
3076
void av_init_packet(AVPacket *pkt);
3077

    
3078
/**
3079
 * Allocate the payload of a packet and initialize its fields with
3080
 * default values.
3081
 *
3082
 * @param pkt packet
3083
 * @param size wanted payload size
3084
 * @return 0 if OK, AVERROR_xxx otherwise
3085
 */
3086
int av_new_packet(AVPacket *pkt, int size);
3087

    
3088
/**
3089
 * Reduce packet size, correctly zeroing padding
3090
 *
3091
 * @param pkt packet
3092
 * @param size new size
3093
 */
3094
void av_shrink_packet(AVPacket *pkt, int size);
3095

    
3096
/**
3097
 * Increase packet size, correctly zeroing padding
3098
 *
3099
 * @param pkt packet
3100
 * @param grow_by number of bytes by which to increase the size of the packet
3101
 */
3102
int av_grow_packet(AVPacket *pkt, int grow_by);
3103

    
3104
/**
3105
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3106
 * packet is allocated if it was not really allocated.
3107
 */
3108
int av_dup_packet(AVPacket *pkt);
3109

    
3110
/**
3111
 * Free a packet.
3112
 *
3113
 * @param pkt packet to free
3114
 */
3115
void av_free_packet(AVPacket *pkt);
3116

    
3117
/* resample.c */
3118

    
3119
struct ReSampleContext;
3120
struct AVResampleContext;
3121

    
3122
typedef struct ReSampleContext ReSampleContext;
3123

    
3124
#if FF_API_AUDIO_OLD
3125
/**
3126
 * @deprecated Use av_audio_resample_init() instead.
3127
 */
3128
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3129
                                                          int output_rate, int input_rate);
3130
#endif
3131
/**
3132
 *  Initialize audio resampling context
3133
 *
3134
 * @param output_channels  number of output channels
3135
 * @param input_channels   number of input channels
3136
 * @param output_rate      output sample rate
3137
 * @param input_rate       input sample rate
3138
 * @param sample_fmt_out   requested output sample format
3139
 * @param sample_fmt_in    input sample format
3140
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff freq
3141
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3142
 * @param linear           If 1 then the used FIR filter will be linearly interpolated
3143
                           between the 2 closest, if 0 the closest will be used
3144
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3145
 * @return allocated ReSampleContext, NULL if error occured
3146
 */
3147
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3148
                                        int output_rate, int input_rate,
3149
                                        enum AVSampleFormat sample_fmt_out,
3150
                                        enum AVSampleFormat sample_fmt_in,
3151
                                        int filter_length, int log2_phase_count,
3152
                                        int linear, double cutoff);
3153

    
3154
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3155
void audio_resample_close(ReSampleContext *s);
3156

    
3157

    
3158
/**
3159
 * Initialize an audio resampler.
3160
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3161
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3162
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3163
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3164
                 between the 2 closest, if 0 the closest will be used
3165
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3166
 */
3167
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3168

    
3169
/**
3170
 * Resample an array of samples using a previously configured context.
3171
 * @param src an array of unconsumed samples
3172
 * @param consumed the number of samples of src which have been consumed are returned here
3173
 * @param src_size the number of unconsumed samples available
3174
 * @param dst_size the amount of space in samples available in dst
3175
 * @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.
3176
 * @return the number of samples written in dst or -1 if an error occurred
3177
 */
3178
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3179

    
3180

    
3181
/**
3182
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3183
 * the resampler parameters, so no audible clicks or similar distortions occur
3184
 * @param compensation_distance distance in output samples over which the compensation should be performed
3185
 * @param sample_delta number of output samples which should be output less
3186
 *
3187
 * example: av_resample_compensate(c, 10, 500)
3188
 * here instead of 510 samples only 500 samples would be output
3189
 *
3190
 * note, due to rounding the actual compensation might be slightly different,
3191
 * especially if the compensation_distance is large and the in_rate used during init is small
3192
 */
3193
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3194
void av_resample_close(struct AVResampleContext *c);
3195

    
3196
/**
3197
 * Allocate memory for a picture.  Call avpicture_free to free it.
3198
 *
3199
 * @param picture the picture to be filled in
3200
 * @param pix_fmt the format of the picture
3201
 * @param width the width of the picture
3202
 * @param height the height of the picture
3203
 * @return zero if successful, a negative value if not
3204
 */
3205
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3206

    
3207
/**
3208
 * Free a picture previously allocated by avpicture_alloc().
3209
 *
3210
 * @param picture the AVPicture to be freed
3211
 */
3212
void avpicture_free(AVPicture *picture);
3213

    
3214
/**
3215
 * Fill in the AVPicture fields.
3216
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3217
 * which points to the image data buffer. Depending on the specified picture
3218
 * format, one or multiple image data pointers and line sizes will be set.
3219
 * If a planar format is specified, several pointers will be set pointing to
3220
 * the different picture planes and the line sizes of the different planes
3221
 * will be stored in the lines_sizes array.
3222
 * Call with ptr == NULL to get the required size for the ptr buffer.
3223
 *
3224
 * @param picture AVPicture whose fields are to be filled in
3225
 * @param ptr Buffer which will contain or contains the actual image data
3226
 * @param pix_fmt The format in which the picture data is stored.
3227
 * @param width the width of the image in pixels
3228
 * @param height the height of the image in pixels
3229
 * @return size of the image data in bytes
3230
 */
3231
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3232
                   enum PixelFormat pix_fmt, int width, int height);
3233
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3234
                     unsigned char *dest, int dest_size);
3235

    
3236
/**
3237
 * Calculate the size in bytes that a picture of the given width and height
3238
 * would occupy if stored in the given picture format.
3239
 * Note that this returns the size of a compact representation as generated
3240
 * by avpicture_layout, which can be smaller than the size required for e.g.
3241
 * avpicture_fill.
3242
 *
3243
 * @param pix_fmt the given picture format
3244
 * @param width the width of the image
3245
 * @param height the height of the image
3246
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3247
 */
3248
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3249
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3250
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3251
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3252

    
3253
#if LIBAVCODEC_VERSION_MAJOR < 53
3254
/**
3255
 * Return the pixel format corresponding to the name name.
3256
 *
3257
 * If there is no pixel format with name name, then look for a
3258
 * pixel format with the name corresponding to the native endian
3259
 * format of name.
3260
 * For example in a little-endian system, first look for "gray16",
3261
 * then for "gray16le".
3262
 *
3263
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3264
 *
3265
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3266
 */
3267
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3268
#endif
3269

    
3270
/**
3271
 * Return a value representing the fourCC code associated to the
3272
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3273
 * found.
3274
 */
3275
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3276

    
3277
/**
3278
 * Put a string representing the codec tag codec_tag in buf.
3279
 *
3280
 * @param buf_size size in bytes of buf
3281
 * @return the length of the string that would have been generated if
3282
 * enough space had been available, excluding the trailing null
3283
 */
3284
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3285

    
3286
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3287
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3288
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3289
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3290
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3291
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3292

    
3293
/**
3294
 * Compute what kind of losses will occur when converting from one specific
3295
 * pixel format to another.
3296
 * When converting from one pixel format to another, information loss may occur.
3297
 * For example, when converting from RGB24 to GRAY, the color information will
3298
 * be lost. Similarly, other losses occur when converting from some formats to
3299
 * other formats. These losses can involve loss of chroma, but also loss of
3300
 * resolution, loss of color depth, loss due to the color space conversion, loss
3301
 * of the alpha bits or loss due to color quantization.
3302
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3303
 * which will occur when converting from one pixel format to another.
3304
 *
3305
 * @param[in] dst_pix_fmt destination pixel format
3306
 * @param[in] src_pix_fmt source pixel format
3307
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3308
 * @return Combination of flags informing you what kind of losses will occur.
3309
 */
3310
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3311
                             int has_alpha);
3312

    
3313
/**
3314
 * Find the best pixel format to convert to given a certain source pixel
3315
 * format.  When converting from one pixel format to another, information loss
3316
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3317
 * information will be lost. Similarly, other losses occur when converting from
3318
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3319
 * the given pixel formats should be used to suffer the least amount of loss.
3320
 * The pixel formats from which it chooses one, are determined by the
3321
 * pix_fmt_mask parameter.
3322
 *
3323
 * @code
3324
 * src_pix_fmt = PIX_FMT_YUV420P;
3325
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3326
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3327
 * @endcode
3328
 *
3329
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3330
 * @param[in] src_pix_fmt source pixel format
3331
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3332
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3333
 * @return The best pixel format to convert to or -1 if none was found.
3334
 */
3335
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3336
                              int has_alpha, int *loss_ptr);
3337

    
3338
#if LIBAVCODEC_VERSION_MAJOR < 53
3339
/**
3340
 * @deprecated Use av_get_pix_fmt_string() instead.
3341
 */
3342
attribute_deprecated
3343
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3344
#endif
3345

    
3346
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3347
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3348

    
3349
/**
3350
 * Tell if an image really has transparent alpha values.
3351
 * @return ored mask of FF_ALPHA_xxx constants
3352
 */
3353
int img_get_alpha_info(const AVPicture *src,
3354
                       enum PixelFormat pix_fmt, int width, int height);
3355

    
3356
/* deinterlace a picture */
3357
/* deinterlace - if not supported return -1 */
3358
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3359
                          enum PixelFormat pix_fmt, int width, int height);
3360

    
3361
/* external high level API */
3362

    
3363
/**
3364
 * If c is NULL, returns the first registered codec,
3365
 * if c is non-NULL, returns the next registered codec after c,
3366
 * or NULL if c is the last one.
3367
 */
3368
AVCodec *av_codec_next(AVCodec *c);
3369

    
3370
/**
3371
 * Return the LIBAVCODEC_VERSION_INT constant.
3372
 */
3373
unsigned avcodec_version(void);
3374

    
3375
/**
3376
 * Return the libavcodec build-time configuration.
3377
 */
3378
const char *avcodec_configuration(void);
3379

    
3380
/**
3381
 * Return the libavcodec license.
3382
 */
3383
const char *avcodec_license(void);
3384

    
3385
/**
3386
 * Initialize libavcodec.
3387
 *
3388
 * @warning This function must be called before any other libavcodec
3389
 * function.
3390
 */
3391
void avcodec_init(void);
3392

    
3393
#if LIBAVCODEC_VERSION_MAJOR < 53
3394
/**
3395
 * @deprecated Deprecated in favor of avcodec_register().
3396
 */
3397
attribute_deprecated void register_avcodec(AVCodec *codec);
3398
#endif
3399

    
3400
/**
3401
 * Register the codec codec and initialize libavcodec.
3402
 *
3403
 * @see avcodec_init()
3404
 */
3405
void avcodec_register(AVCodec *codec);
3406

    
3407
/**
3408
 * Find a registered encoder with a matching codec ID.
3409
 *
3410
 * @param id CodecID of the requested encoder
3411
 * @return An encoder if one was found, NULL otherwise.
3412
 */
3413
AVCodec *avcodec_find_encoder(enum CodecID id);
3414

    
3415
/**
3416
 * Find a registered encoder with the specified name.
3417
 *
3418
 * @param name name of the requested encoder
3419
 * @return An encoder if one was found, NULL otherwise.
3420
 */
3421
AVCodec *avcodec_find_encoder_by_name(const char *name);
3422

    
3423
/**
3424
 * Find a registered decoder with a matching codec ID.
3425
 *
3426
 * @param id CodecID of the requested decoder
3427
 * @return A decoder if one was found, NULL otherwise.
3428
 */
3429
AVCodec *avcodec_find_decoder(enum CodecID id);
3430

    
3431
/**
3432
 * Find a registered decoder with the specified name.
3433
 *
3434
 * @param name name of the requested decoder
3435
 * @return A decoder if one was found, NULL otherwise.
3436
 */
3437
AVCodec *avcodec_find_decoder_by_name(const char *name);
3438
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3439

    
3440
/**
3441
 * Return a name for the specified profile, if available.
3442
 *
3443
 * @param codec the codec that is searched for the given profile
3444
 * @param profile the profile value for which a name is requested
3445
 * @return A name for the profile if found, NULL otherwise.
3446
 */
3447
const char *av_get_profile_name(const AVCodec *codec, int profile);
3448

    
3449
/**
3450
 * Set the fields of the given AVCodecContext to default values.
3451
 *
3452
 * @param s The AVCodecContext of which the fields should be set to default values.
3453
 */
3454
void avcodec_get_context_defaults(AVCodecContext *s);
3455

    
3456
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3457
 *  we WILL change its arguments and name a few times! */
3458
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3459

    
3460
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3461
 *  we WILL change its arguments and name a few times! */
3462
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3463

    
3464
/**
3465
 * Allocate an AVCodecContext and set its fields to default values.  The
3466
 * resulting struct can be deallocated by simply calling av_free().
3467
 *
3468
 * @return An AVCodecContext filled with default values or NULL on failure.
3469
 * @see avcodec_get_context_defaults
3470
 */
3471
AVCodecContext *avcodec_alloc_context(void);
3472

    
3473
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3474
 *  we WILL change its arguments and name a few times! */
3475
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3476

    
3477
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3478
 *  we WILL change its arguments and name a few times! */
3479
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3480

    
3481
/**
3482
 * Copy the settings of the source AVCodecContext into the destination
3483
 * AVCodecContext. The resulting destination codec context will be
3484
 * unopened, i.e. you are required to call avcodec_open() before you
3485
 * can use this AVCodecContext to decode/encode video/audio data.
3486
 *
3487
 * @param dest target codec context, should be initialized with
3488
 *             avcodec_alloc_context(), but otherwise uninitialized
3489
 * @param src source codec context
3490
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3491
 */
3492
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3493

    
3494
/**
3495
 * Set the fields of the given AVFrame to default values.
3496
 *
3497
 * @param pic The AVFrame of which the fields should be set to default values.
3498
 */
3499
void avcodec_get_frame_defaults(AVFrame *pic);
3500

    
3501
/**
3502
 * Allocate an AVFrame and set its fields to default values.  The resulting
3503
 * struct can be deallocated by simply calling av_free().
3504
 *
3505
 * @return An AVFrame filled with default values or NULL on failure.
3506
 * @see avcodec_get_frame_defaults
3507
 */
3508
AVFrame *avcodec_alloc_frame(void);
3509

    
3510
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3511
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3512
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3513

    
3514
/**
3515
 * Return the amount of padding in pixels which the get_buffer callback must
3516
 * provide around the edge of the image for codecs which do not have the
3517
 * CODEC_FLAG_EMU_EDGE flag.
3518
 *
3519
 * @return Required padding in pixels.
3520
 */
3521
unsigned avcodec_get_edge_width(void);
3522
/**
3523
 * Modify width and height values so that they will result in a memory
3524
 * buffer that is acceptable for the codec if you do not use any horizontal
3525
 * padding.
3526
 *
3527
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3528
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3529
 * according to avcodec_get_edge_width() before.
3530
 */
3531
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3532
/**
3533
 * Modify width and height values so that they will result in a memory
3534
 * buffer that is acceptable for the codec if you also ensure that all
3535
 * line sizes are a multiple of the respective linesize_align[i].
3536
 *
3537
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3538
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3539
 * according to avcodec_get_edge_width() before.
3540
 */
3541
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3542
                               int linesize_align[4]);
3543

    
3544
#if LIBAVCODEC_VERSION_MAJOR < 53
3545
/**
3546
 * @deprecated Deprecated in favor of av_check_image_size().
3547
 */
3548
attribute_deprecated
3549
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3550
#endif
3551

    
3552
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3553

    
3554
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3555
void avcodec_thread_free(AVCodecContext *s);
3556
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3557
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3558
//FIXME func typedef
3559

    
3560
/**
3561
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3562
 * function the context has to be allocated.
3563
 *
3564
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3565
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3566
 * retrieving a codec.
3567
 *
3568
 * @warning This function is not thread safe!
3569
 *
3570
 * @code
3571
 * avcodec_register_all();
3572
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3573
 * if (!codec)
3574
 *     exit(1);
3575
 *
3576
 * context = avcodec_alloc_context();
3577
 *
3578
 * if (avcodec_open(context, codec) < 0)
3579
 *     exit(1);
3580
 * @endcode
3581
 *
3582
 * @param avctx The context which will be set up to use the given codec.
3583
 * @param codec The codec to use within the context.
3584
 * @return zero on success, a negative value on error
3585
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3586
 */
3587
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3588

    
3589
#if FF_API_AUDIO_OLD
3590
/**
3591
 * Decode an audio frame from buf into samples.
3592
 * Wrapper function which calls avcodec_decode_audio3.
3593
 *
3594
 * @deprecated Use avcodec_decode_audio3 instead.
3595
 * @param avctx the codec context
3596
 * @param[out] samples the output buffer
3597
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3598
 * @param[in] buf the input buffer
3599
 * @param[in] buf_size the input buffer size in bytes
3600
 * @return On error a negative value is returned, otherwise the number of bytes
3601
 * used or zero if no frame could be decompressed.
3602
 */
3603
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3604
                         int *frame_size_ptr,
3605
                         const uint8_t *buf, int buf_size);
3606
#endif
3607

    
3608
/**
3609
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3610
 * Some decoders may support multiple frames in a single AVPacket, such
3611
 * decoders would then just decode the first frame. In this case,
3612
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3613
 * the remaining data in order to decode the second frame etc.
3614
 * If no frame
3615
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3616
 * decompressed frame size in bytes.
3617
 *
3618
 * @warning You must set frame_size_ptr to the allocated size of the
3619
 * output buffer before calling avcodec_decode_audio3().
3620
 *
3621
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3622
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3623
 * bits at once and could read over the end.
3624
 *
3625
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3626
 * no overreading happens for damaged MPEG streams.
3627
 *
3628
 * @note You might have to align the input buffer avpkt->data and output buffer
3629
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3630
 * necessary at all, on others it won't work at all if not aligned and on others
3631
 * it will work but it will have an impact on performance.
3632
 *
3633
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3634
 * samples should be 16 byte aligned unless the CPU doesn't need it
3635
 * (AltiVec and SSE do).
3636
 *
3637
 * @param avctx the codec context
3638
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3639
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3640
 * @param[in] avpkt The input AVPacket containing the input buffer.
3641
 *            You can create such packet with av_init_packet() and by then setting
3642
 *            data and size, some decoders might in addition need other fields.
3643
 *            All decoders are designed to use the least fields possible though.
3644
 * @return On error a negative value is returned, otherwise the number of bytes
3645
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3646
 */
3647
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3648
                         int *frame_size_ptr,
3649
                         AVPacket *avpkt);
3650

    
3651
#if FF_API_VIDEO_OLD
3652
/**
3653
 * Decode a video frame from buf into picture.
3654
 * Wrapper function which calls avcodec_decode_video2.
3655
 *
3656
 * @deprecated Use avcodec_decode_video2 instead.
3657
 * @param avctx the codec context
3658
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3659
 * @param[in] buf the input buffer
3660
 * @param[in] buf_size the size of the input buffer in bytes
3661
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3662
 * @return On error a negative value is returned, otherwise the number of bytes
3663
 * used or zero if no frame could be decompressed.
3664
 */
3665
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3666
                         int *got_picture_ptr,
3667
                         const uint8_t *buf, int buf_size);
3668
#endif
3669

    
3670
/**
3671
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3672
 * Some decoders may support multiple frames in a single AVPacket, such
3673
 * decoders would then just decode the first frame.
3674
 *
3675
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3676
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3677
 * bits at once and could read over the end.
3678
 *
3679
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3680
 * no overreading happens for damaged MPEG streams.
3681
 *
3682
 * @note You might have to align the input buffer avpkt->data.
3683
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3684
 * necessary at all, on others it won't work at all if not aligned and on others
3685
 * it will work but it will have an impact on performance.
3686
 *
3687
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3688
 *
3689
 * @note Some codecs have a delay between input and output, these need to be
3690
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3691
 *
3692
 * @param avctx the codec context
3693
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3694
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3695
 *             allocate memory for the actual bitmap.
3696
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3697
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3698
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3699
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3700
 *
3701
 * @param[in] avpkt The input AVpacket containing the input buffer.
3702
 *            You can create such packet with av_init_packet() and by then setting
3703
 *            data and size, some decoders might in addition need other fields like
3704
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3705
 *            fields possible.
3706
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3707
 * @return On error a negative value is returned, otherwise the number of bytes
3708
 * used or zero if no frame could be decompressed.
3709
 */
3710
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3711
                         int *got_picture_ptr,
3712
                         AVPacket *avpkt);
3713

    
3714
#if FF_API_SUBTITLE_OLD
3715
/* Decode a subtitle message. Return -1 if error, otherwise return the
3716
 * number of bytes used. If no subtitle could be decompressed,
3717
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3718
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3719
                            int *got_sub_ptr,
3720
                            const uint8_t *buf, int buf_size);
3721
#endif
3722

    
3723
/**
3724
 * Decode a subtitle message.
3725
 * Return a negative value on error, otherwise return the number of bytes used.
3726
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3727
 * Otherwise, the subtitle is stored in *sub.
3728
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3729
 * simplicity, because the performance difference is expect to be negligible
3730
 * and reusing a get_buffer written for video codecs would probably perform badly
3731
 * due to a potentially very different allocation pattern.
3732
 *
3733
 * @param avctx the codec context
3734
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3735
                   freed with avsubtitle_free if *got_sub_ptr is set.
3736
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3737
 * @param[in] avpkt The input AVPacket containing the input buffer.
3738
 */
3739
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3740
                            int *got_sub_ptr,
3741
                            AVPacket *avpkt);
3742

    
3743
/**
3744
 * Frees all allocated data in the given subtitle struct.
3745
 *
3746
 * @param sub AVSubtitle to free.
3747
 */
3748
void avsubtitle_free(AVSubtitle *sub);
3749

    
3750
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3751
                        int *data_size_ptr,
3752
                        uint8_t *buf, int buf_size);
3753

    
3754
/**
3755
 * Encode an audio frame from samples into buf.
3756
 *
3757
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3758
 * However, for PCM audio the user will know how much space is needed
3759
 * because it depends on the value passed in buf_size as described
3760
 * below. In that case a lower value can be used.
3761
 *
3762
 * @param avctx the codec context
3763
 * @param[out] buf the output buffer
3764
 * @param[in] buf_size the output buffer size
3765
 * @param[in] samples the input buffer containing the samples
3766
 * The number of samples read from this buffer is frame_size*channels,
3767
 * both of which are defined in avctx.
3768
 * For PCM audio the number of samples read from samples is equal to
3769
 * buf_size * input_sample_size / output_sample_size.
3770
 * @return On error a negative value is returned, on success zero or the number
3771
 * of bytes used to encode the data read from the input buffer.
3772
 */
3773
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3774
                         const short *samples);
3775

    
3776
/**
3777
 * Encode a video frame from pict into buf.
3778
 * The input picture should be
3779
 * stored using a specific format, namely avctx.pix_fmt.
3780
 *
3781
 * @param avctx the codec context
3782
 * @param[out] buf the output buffer for the bitstream of encoded frame
3783
 * @param[in] buf_size the size of the output buffer in bytes
3784
 * @param[in] pict the input picture to encode
3785
 * @return On error a negative value is returned, on success zero or the number
3786
 * of bytes used from the output buffer.
3787
 */
3788
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3789
                         const AVFrame *pict);
3790
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3791
                            const AVSubtitle *sub);
3792

    
3793
int avcodec_close(AVCodecContext *avctx);
3794

    
3795
/**
3796
 * Register all the codecs, parsers and bitstream filters which were enabled at
3797
 * configuration time. If you do not call this function you can select exactly
3798
 * which formats you want to support, by using the individual registration
3799
 * functions.
3800
 *
3801
 * @see avcodec_register
3802
 * @see av_register_codec_parser
3803
 * @see av_register_bitstream_filter
3804
 */
3805
void avcodec_register_all(void);
3806

    
3807
/**
3808
 * Flush buffers, should be called when seeking or when switching to a different stream.
3809
 */
3810
void avcodec_flush_buffers(AVCodecContext *avctx);
3811

    
3812
void avcodec_default_free_buffers(AVCodecContext *s);
3813

    
3814
/* misc useful functions */
3815

    
3816
/**
3817
 * Return a single letter to describe the given picture type pict_type.
3818
 *
3819
 * @param[in] pict_type the picture type
3820
 * @return A single character representing the picture type.
3821
 */
3822
char av_get_pict_type_char(int pict_type);
3823

    
3824
/**
3825
 * Return codec bits per sample.
3826
 *
3827
 * @param[in] codec_id the codec
3828
 * @return Number of bits per sample or zero if unknown for the given codec.
3829
 */
3830
int av_get_bits_per_sample(enum CodecID codec_id);
3831

    
3832
#if FF_API_OLD_SAMPLE_FMT
3833
/**
3834
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3835
 */
3836
attribute_deprecated
3837
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3838
#endif
3839

    
3840
/* frame parsing */
3841
typedef struct AVCodecParserContext {
3842
    void *priv_data;
3843
    struct AVCodecParser *parser;
3844
    int64_t frame_offset; /* offset of the current frame */
3845
    int64_t cur_offset; /* current offset
3846
                           (incremented by each av_parser_parse()) */
3847
    int64_t next_frame_offset; /* offset of the next frame */
3848
    /* video info */
3849
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3850
    /**
3851
     * This field is used for proper frame duration computation in lavf.
3852
     * It signals, how much longer the frame duration of the current frame
3853
     * is compared to normal frame duration.
3854
     *
3855
     * frame_duration = (1 + repeat_pict) * time_base
3856
     *
3857
     * It is used by codecs like H.264 to display telecined material.
3858
     */
3859
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3860
    int64_t pts;     /* pts of the current frame */
3861
    int64_t dts;     /* dts of the current frame */
3862

    
3863
    /* private data */
3864
    int64_t last_pts;
3865
    int64_t last_dts;
3866
    int fetch_timestamp;
3867

    
3868
#define AV_PARSER_PTS_NB 4
3869
    int cur_frame_start_index;
3870
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3871
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3872
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3873

    
3874
    int flags;
3875
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3876
#define PARSER_FLAG_ONCE                      0x0002
3877
/// Set if the parser has a valid file offset
3878
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3879

    
3880
    int64_t offset;      ///< byte offset from starting packet start
3881
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3882

    
3883
    /*!
3884
     * Set by parser to 1 for key frames and 0 for non-key frames.
3885
     * It is initialized to -1, so if the parser doesn't set this flag,
3886
     * old-style fallback using FF_I_TYPE picture type as key frames
3887
     * will be used.
3888
     */
3889
    int key_frame;
3890

    
3891
    /**
3892
     * Time difference in stream time base units from the pts of this
3893
     * packet to the point at which the output from the decoder has converged
3894
     * independent from the availability of previous frames. That is, the
3895
     * frames are virtually identical no matter if decoding started from
3896
     * the very first frame or from this keyframe.
3897
     * Is AV_NOPTS_VALUE if unknown.
3898
     * This field is not the display duration of the current frame.
3899
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3900
     * set.
3901
     *
3902
     * The purpose of this field is to allow seeking in streams that have no
3903
     * keyframes in the conventional sense. It corresponds to the
3904
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3905
     * essential for some types of subtitle streams to ensure that all
3906
     * subtitles are correctly displayed after seeking.
3907
     */
3908
    int64_t convergence_duration;
3909

    
3910
    // Timestamp generation support:
3911
    /**
3912
     * Synchronization point for start of timestamp generation.
3913
     *
3914
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3915
     * (default).
3916
     *
3917
     * For example, this corresponds to presence of H.264 buffering period
3918
     * SEI message.
3919
     */
3920
    int dts_sync_point;
3921

    
3922
    /**
3923
     * Offset of the current timestamp against last timestamp sync point in
3924
     * units of AVCodecContext.time_base.
3925
     *
3926
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3927
     * contain a valid timestamp offset.
3928
     *
3929
     * Note that the timestamp of sync point has usually a nonzero
3930
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3931
     * the next frame after timestamp sync point will be usually 1.
3932
     *
3933
     * For example, this corresponds to H.264 cpb_removal_delay.
3934
     */
3935
    int dts_ref_dts_delta;
3936

    
3937
    /**
3938
     * Presentation delay of current frame in units of AVCodecContext.time_base.
3939
     *
3940
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3941
     * contain valid non-negative timestamp delta (presentation time of a frame
3942
     * must not lie in the past).
3943
     *
3944
     * This delay represents the difference between decoding and presentation
3945
     * time of the frame.
3946
     *
3947
     * For example, this corresponds to H.264 dpb_output_delay.
3948
     */
3949
    int pts_dts_delta;
3950

    
3951
    /**
3952
     * Position of the packet in file.
3953
     *
3954
     * Analogous to cur_frame_pts/dts
3955
     */
3956
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3957

    
3958
    /**
3959
     * Byte position of currently parsed frame in stream.
3960
     */
3961
    int64_t pos;
3962

    
3963
    /**
3964
     * Previous frame byte position.
3965
     */
3966
    int64_t last_pos;
3967
} AVCodecParserContext;
3968

    
3969
typedef struct AVCodecParser {
3970
    int codec_ids[5]; /* several codec IDs are permitted */
3971
    int priv_data_size;
3972
    int (*parser_init)(AVCodecParserContext *s);
3973
    int (*parser_parse)(AVCodecParserContext *s,
3974
                        AVCodecContext *avctx,
3975
                        const uint8_t **poutbuf, int *poutbuf_size,
3976
                        const uint8_t *buf, int buf_size);
3977
    void (*parser_close)(AVCodecParserContext *s);
3978
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3979
    struct AVCodecParser *next;
3980
} AVCodecParser;
3981

    
3982
AVCodecParser *av_parser_next(AVCodecParser *c);
3983

    
3984
void av_register_codec_parser(AVCodecParser *parser);
3985
AVCodecParserContext *av_parser_init(int codec_id);
3986

    
3987
#if LIBAVCODEC_VERSION_MAJOR < 53
3988
attribute_deprecated
3989
int av_parser_parse(AVCodecParserContext *s,
3990
                    AVCodecContext *avctx,
3991
                    uint8_t **poutbuf, int *poutbuf_size,
3992
                    const uint8_t *buf, int buf_size,
3993
                    int64_t pts, int64_t dts);
3994
#endif
3995

    
3996
/**
3997
 * Parse a packet.
3998
 *
3999
 * @param s             parser context.
4000
 * @param avctx         codec context.
4001
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4002
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4003
 * @param buf           input buffer.
4004
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4005
 * @param pts           input presentation timestamp.
4006
 * @param dts           input decoding timestamp.
4007
 * @param pos           input byte position in stream.
4008
 * @return the number of bytes of the input bitstream used.
4009
 *
4010
 * Example:
4011
 * @code
4012
 *   while(in_len){
4013
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4014
 *                                        in_data, in_len,
4015
 *                                        pts, dts, pos);
4016
 *       in_data += len;
4017
 *       in_len  -= len;
4018
 *
4019
 *       if(size)
4020
 *          decode_frame(data, size);
4021
 *   }
4022
 * @endcode
4023
 */
4024
int av_parser_parse2(AVCodecParserContext *s,
4025
                     AVCodecContext *avctx,
4026
                     uint8_t **poutbuf, int *poutbuf_size,
4027
                     const uint8_t *buf, int buf_size,
4028
                     int64_t pts, int64_t dts,
4029
                     int64_t pos);
4030

    
4031
int av_parser_change(AVCodecParserContext *s,
4032
                     AVCodecContext *avctx,
4033
                     uint8_t **poutbuf, int *poutbuf_size,
4034
                     const uint8_t *buf, int buf_size, int keyframe);
4035
void av_parser_close(AVCodecParserContext *s);
4036

    
4037

    
4038
typedef struct AVBitStreamFilterContext {
4039
    void *priv_data;
4040
    struct AVBitStreamFilter *filter;
4041
    AVCodecParserContext *parser;
4042
    struct AVBitStreamFilterContext *next;
4043
} AVBitStreamFilterContext;
4044

    
4045

    
4046
typedef struct AVBitStreamFilter {
4047
    const char *name;
4048
    int priv_data_size;
4049
    int (*filter)(AVBitStreamFilterContext *bsfc,
4050
                  AVCodecContext *avctx, const char *args,
4051
                  uint8_t **poutbuf, int *poutbuf_size,
4052
                  const uint8_t *buf, int buf_size, int keyframe);
4053
    void (*close)(AVBitStreamFilterContext *bsfc);
4054
    struct AVBitStreamFilter *next;
4055
} AVBitStreamFilter;
4056

    
4057
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4058
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4059
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4060
                               AVCodecContext *avctx, const char *args,
4061
                               uint8_t **poutbuf, int *poutbuf_size,
4062
                               const uint8_t *buf, int buf_size, int keyframe);
4063
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4064

    
4065
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4066

    
4067
/* memory */
4068

    
4069
/**
4070
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4071
 *
4072
 * @see av_realloc
4073
 */
4074
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4075

    
4076
/**
4077
 * Allocate a buffer, reusing the given one if large enough.
4078
 *
4079
 * Contrary to av_fast_realloc the current buffer contents might not be
4080
 * preserved and on error the old buffer is freed, thus no special
4081
 * handling to avoid memleaks is necessary.
4082
 *
4083
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4084
 * @param size size of the buffer *ptr points to
4085
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4086
 *                 *size 0 if an error occurred.
4087
 */
4088
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4089

    
4090
#if LIBAVCODEC_VERSION_MAJOR < 53
4091
/**
4092
 * @deprecated Deprecated in favor of av_image_copy().
4093
 */
4094
attribute_deprecated
4095
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4096
                          uint8_t *src_data[4], int src_linesize[4],
4097
                          enum PixelFormat pix_fmt, int width, int height);
4098
#endif
4099

    
4100
/**
4101
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4102
 */
4103
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4104
                     enum PixelFormat pix_fmt, int width, int height);
4105

    
4106
/**
4107
 * Crop image top and left side.
4108
 */
4109
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4110
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4111

    
4112
/**
4113
 * Pad image.
4114
 */
4115
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4116
            int padtop, int padbottom, int padleft, int padright, int *color);
4117

    
4118
/**
4119
 * Encode extradata length to a buffer. Used by xiph codecs.
4120
 *
4121
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4122
 * @param v size of extradata in bytes
4123
 * @return number of bytes written to the buffer.
4124
 */
4125
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4126

    
4127
#if LIBAVCODEC_VERSION_MAJOR < 53
4128
/**
4129
 * Parse str and put in width_ptr and height_ptr the detected values.
4130
 *
4131
 * @deprecated Deprecated in favor of av_parse_video_size().
4132
 */
4133
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4134

    
4135
/**
4136
 * Parse str and store the detected values in *frame_rate.
4137
 *
4138
 * @deprecated Deprecated in favor of av_parse_video_rate().
4139
 */
4140
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4141
#endif
4142

    
4143
/**
4144
 * Logs a generic warning message about a missing feature. This function is
4145
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4146
 * only, and would normally not be used by applications.
4147
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4148
 * a pointer to an AVClass struct
4149
 * @param[in] feature string containing the name of the missing feature
4150
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4151
 * If want_sample is non-zero, additional verbage will be added to the log
4152
 * message which tells the user how to report samples to the development
4153
 * mailing list.
4154
 */
4155
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4156

    
4157
/**
4158
 * Log a generic warning message asking for a sample. This function is
4159
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4160
 * only, and would normally not be used by applications.
4161
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4162
 * a pointer to an AVClass struct
4163
 * @param[in] msg string containing an optional message, or NULL if no message
4164
 */
4165
void av_log_ask_for_sample(void *avc, const char *msg);
4166

    
4167
/**
4168
 * Register the hardware accelerator hwaccel.
4169
 */
4170
void av_register_hwaccel(AVHWAccel *hwaccel);
4171

    
4172
/**
4173
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4174
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4175
 * after hwaccel, or NULL if hwaccel is the last one.
4176
 */
4177
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4178

    
4179

    
4180
/**
4181
 * Lock operation used by lockmgr
4182
 */
4183
enum AVLockOp {
4184
  AV_LOCK_CREATE,  ///< Create a mutex
4185
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4186
  AV_LOCK_RELEASE, ///< Unlock the mutex
4187
  AV_LOCK_DESTROY, ///< Free mutex resources
4188
};
4189

    
4190
/**
4191
 * Register a user provided lock manager supporting the operations
4192
 * specified by AVLockOp. mutex points to a (void *) where the
4193
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4194
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4195
 *
4196
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4197
 *           callback during the call to av_lockmgr_register().
4198
 *           Thus, the application must be prepared to handle that.
4199
 *           If cb is set to NULL the lockmgr will be unregistered.
4200
 *           Also note that during unregistration the previously registered
4201
 *           lockmgr callback may also be invoked.
4202
 */
4203
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4204

    
4205
#endif /* AVCODEC_AVCODEC_H */