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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 FFMPEG_AVCODEC_H
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#define FFMPEG_AVCODEC_H
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/**
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 * @file avcodec.h
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 * external API header
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 */
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#include "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 51
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#define LIBAVCODEC_VERSION_MINOR 57
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#define LIBAVCODEC_VERSION_MICRO  2
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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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#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
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#define AV_TIME_BASE            1000000
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#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
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/**
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 * Identifies the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. it is as close as possible to similar codecs.
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 */
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enum CodecID {
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    CODEC_ID_NONE,
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    /* video codecs */
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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    CODEC_ID_MPEG2VIDEO_XVMC,
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    CODEC_ID_H261,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_RV20,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MJPEGB,
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    CODEC_ID_LJPEG,
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    CODEC_ID_SP5X,
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    CODEC_ID_JPEGLS,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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    CODEC_ID_WMV2,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    CODEC_ID_FLV1,
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    CODEC_ID_SVQ1,
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    CODEC_ID_SVQ3,
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    CODEC_ID_DVVIDEO,
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    CODEC_ID_HUFFYUV,
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    CODEC_ID_CYUV,
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    CODEC_ID_H264,
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    CODEC_ID_INDEO3,
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    CODEC_ID_VP3,
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    CODEC_ID_THEORA,
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    CODEC_ID_ASV1,
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    CODEC_ID_ASV2,
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    CODEC_ID_FFV1,
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    CODEC_ID_4XM,
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    CODEC_ID_VCR1,
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    CODEC_ID_CLJR,
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    CODEC_ID_MDEC,
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    CODEC_ID_ROQ,
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    CODEC_ID_INTERPLAY_VIDEO,
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    CODEC_ID_XAN_WC3,
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    CODEC_ID_XAN_WC4,
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    CODEC_ID_RPZA,
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    CODEC_ID_CINEPAK,
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    CODEC_ID_WS_VQA,
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    CODEC_ID_MSRLE,
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    CODEC_ID_MSVIDEO1,
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    CODEC_ID_IDCIN,
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    CODEC_ID_8BPS,
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    CODEC_ID_SMC,
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    CODEC_ID_FLIC,
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    CODEC_ID_TRUEMOTION1,
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    CODEC_ID_VMDVIDEO,
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    CODEC_ID_MSZH,
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    CODEC_ID_ZLIB,
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    CODEC_ID_QTRLE,
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    CODEC_ID_SNOW,
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    CODEC_ID_TSCC,
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    CODEC_ID_ULTI,
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    CODEC_ID_QDRAW,
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    CODEC_ID_VIXL,
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    CODEC_ID_QPEG,
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    CODEC_ID_XVID,
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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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    /* 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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    /* 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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    /* 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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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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    CODEC_ID_MPEG4AAC,
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#endif
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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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    /* 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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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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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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};
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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/* CODEC_ID_MP3LAME is obsolete */
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#define CODEC_ID_MP3LAME CODEC_ID_MP3
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
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#endif
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enum CodecType {
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    CODEC_TYPE_UNKNOWN = -1,
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    CODEC_TYPE_VIDEO,
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    CODEC_TYPE_AUDIO,
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    CODEC_TYPE_DATA,
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    CODEC_TYPE_SUBTITLE,
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    CODEC_TYPE_ATTACHMENT,
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    CODEC_TYPE_NB
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};
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/**
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 * Currently unused, may be used if 24/32 bits samples are ever supported.
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 * all in native-endian format
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 */
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enum SampleFormat {
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    SAMPLE_FMT_NONE = -1,
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    SAMPLE_FMT_U8,              ///< unsigned 8 bits
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    SAMPLE_FMT_S16,             ///< signed 16 bits
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    SAMPLE_FMT_S24,             ///< signed 24 bits
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    SAMPLE_FMT_S32,             ///< signed 32 bits
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    SAMPLE_FMT_FLT,             ///< float
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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/**
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 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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 * This is mainly needed because some optimized bitstream readers read
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 * 32 or 64 bit at once and could read over the end.<br>
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 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
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 * MPEG bitstreams could cause overread and segfault.
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 */
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/**
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 * minimum encoding buffer size
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 * Used to avoid some checks during header writing.
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 */
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#define FF_MIN_BUFFER_SIZE 16384
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/**
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 * motion estimation type.
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 */
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enum Motion_Est_ID {
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    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,        ///< enhanced predictive zonal search
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    ME_X1,          ///< reserved for experiments
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    ME_HEX,         ///< hexagon based search
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    ME_UMH,         ///< uneven multi-hexagon search
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    ME_ITER,        ///< iterative search
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    ME_TESA,        ///< transformed exhaustive search algorithm
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};
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enum AVDiscard{
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    /* We leave some space between them for extensions (drop some
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     * keyframes for intra-only or drop just some bidir frames). */
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    AVDISCARD_NONE   =-16, ///< discard nothing
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    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
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    AVDISCARD_NONREF =  8, ///< discard all non reference
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    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
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    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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    AVDISCARD_ALL    = 48, ///< discard all
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};
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typedef struct RcOverride{
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    int start_frame;
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    int end_frame;
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    int qscale; // If this is 0 then quality_factor will be used instead.
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    float quality_factor;
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} RcOverride;
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#define FF_MAX_B_FRAMES 16
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/* encoding support
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   These flags can be passed in AVCodecContext.flags before initialization.
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   Note: Not everything is supported yet.
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*/
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#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
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#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
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#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
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#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
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#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
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#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
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/**
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 * The parent program guarantees that the input for B-frames containing
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 * streams is not written to for at least s->max_b_frames+1 frames, if
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 * this is not set the input will be copied.
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 */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
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#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
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#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
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#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
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#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
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#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
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#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
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                                                  location instead of only at frame boundaries. */
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#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
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#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
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#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
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#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< Use trellis quantization.
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#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
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#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
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/* Fx : Flag for h263+ extra options */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
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#endif
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#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
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#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
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#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
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#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
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#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
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#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
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#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
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#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
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#define CODEC_FLAG_CLOSED_GOP     0x80000000
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#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
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#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
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#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
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#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
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#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
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#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
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#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
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#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
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#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
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#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
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#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
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#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
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#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
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#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
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#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
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#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
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#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
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/* Unsupported options :
467
 *              Syntax Arithmetic coding (SAC)
468
 *              Reference Picture Selection
469
 *              Independent Segment Decoding */
470
/* /Fx */
471
/* codec capabilities */
472

    
473
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
474
/**
475
 * Codec uses get_buffer() for allocating buffers.
476
 * direct rendering method 1
477
 */
478
#define CODEC_CAP_DR1             0x0002
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/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
480
#define CODEC_CAP_PARSE_ONLY      0x0004
481
#define CODEC_CAP_TRUNCATED       0x0008
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/* Codec can export data for HW decoding (XvMC). */
483
#define CODEC_CAP_HWACCEL         0x0010
484
/**
485
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
486
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
487
 */
488
#define CODEC_CAP_DELAY           0x0020
489
/**
490
 * Codec can be fed a final frame with a smaller size.
491
 * This can be used to prevent truncation of the last audio samples.
492
 */
493
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
494

    
495
//The following defines may change, don't expect compatibility if you use them.
496
#define MB_TYPE_INTRA4x4   0x0001
497
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
498
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
499
#define MB_TYPE_16x16      0x0008
500
#define MB_TYPE_16x8       0x0010
501
#define MB_TYPE_8x16       0x0020
502
#define MB_TYPE_8x8        0x0040
503
#define MB_TYPE_INTERLACED 0x0080
504
#define MB_TYPE_DIRECT2    0x0100 //FIXME
505
#define MB_TYPE_ACPRED     0x0200
506
#define MB_TYPE_GMC        0x0400
507
#define MB_TYPE_SKIP       0x0800
508
#define MB_TYPE_P0L0       0x1000
509
#define MB_TYPE_P1L0       0x2000
510
#define MB_TYPE_P0L1       0x4000
511
#define MB_TYPE_P1L1       0x8000
512
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
513
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
514
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
515
#define MB_TYPE_QUANT      0x00010000
516
#define MB_TYPE_CBP        0x00020000
517
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
518

    
519
/**
520
 * Pan Scan area.
521
 * This specifies the area which should be displayed.
522
 * Note there may be multiple such areas for one frame.
523
 */
524
typedef struct AVPanScan{
525
    /**
526
     * id
527
     * - encoding: Set by user.
528
     * - decoding: Set by libavcodec.
529
     */
530
    int id;
531

    
532
    /**
533
     * width and height in 1/16 pel
534
     * - encoding: Set by user.
535
     * - decoding: Set by libavcodec.
536
     */
537
    int width;
538
    int height;
539

    
540
    /**
541
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
542
     * - encoding: Set by user.
543
     * - decoding: Set by libavcodec.
544
     */
545
    int16_t position[3][2];
546
}AVPanScan;
547

    
548
#define FF_COMMON_FRAME \
549
    /**\
550
     * pointer to the picture planes.\
551
     * This might be different from the first allocated byte\
552
     * - encoding: \
553
     * - decoding: \
554
     */\
555
    uint8_t *data[4];\
556
    int linesize[4];\
557
    /**\
558
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
559
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
560
     * - encoding: \
561
     * - decoding: \
562
     */\
563
    uint8_t *base[4];\
564
    /**\
565
     * 1 -> keyframe, 0-> not\
566
     * - encoding: Set by libavcodec.\
567
     * - decoding: Set by libavcodec.\
568
     */\
569
    int key_frame;\
570
\
571
    /**\
572
     * Picture type of the frame, see ?_TYPE below.\
573
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
574
     * - decoding: Set by libavcodec.\
575
     */\
576
    int pict_type;\
577
\
578
    /**\
579
     * presentation timestamp in time_base units (time when frame should be shown to user)\
580
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
581
     * - encoding: MUST be set by user.\
582
     * - decoding: Set by libavcodec.\
583
     */\
584
    int64_t pts;\
585
\
586
    /**\
587
     * picture number in bitstream order\
588
     * - encoding: set by\
589
     * - decoding: Set by libavcodec.\
590
     */\
591
    int coded_picture_number;\
592
    /**\
593
     * picture number in display order\
594
     * - encoding: set by\
595
     * - decoding: Set by libavcodec.\
596
     */\
597
    int display_picture_number;\
598
\
599
    /**\
600
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
601
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
602
     * - decoding: Set by libavcodec.\
603
     */\
604
    int quality; \
605
\
606
    /**\
607
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
608
     * Set to INT_MAX if the buffer has not been used yet.\
609
     * - encoding: unused\
610
     * - decoding: MUST be set by get_buffer().\
611
     */\
612
    int age;\
613
\
614
    /**\
615
     * is this picture used as reference\
616
     * The values for this are the same as the MpegEncContext.picture_structure\
617
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
618
     * - encoding: unused\
619
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
620
     */\
621
    int reference;\
622
\
623
    /**\
624
     * QP table\
625
     * - encoding: unused\
626
     * - decoding: Set by libavcodec.\
627
     */\
628
    int8_t *qscale_table;\
629
    /**\
630
     * QP store stride\
631
     * - encoding: unused\
632
     * - decoding: Set by libavcodec.\
633
     */\
634
    int qstride;\
635
\
636
    /**\
637
     * mbskip_table[mb]>=1 if MB didn't change\
638
     * stride= mb_width = (width+15)>>4\
639
     * - encoding: unused\
640
     * - decoding: Set by libavcodec.\
641
     */\
642
    uint8_t *mbskip_table;\
643
\
644
    /**\
645
     * motion vector table\
646
     * @code\
647
     * example:\
648
     * int mv_sample_log2= 4 - motion_subsample_log2;\
649
     * int mb_width= (width+15)>>4;\
650
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
651
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
652
     * @endcode\
653
     * - encoding: Set by user.\
654
     * - decoding: Set by libavcodec.\
655
     */\
656
    int16_t (*motion_val[2])[2];\
657
\
658
    /**\
659
     * macroblock type table\
660
     * mb_type_base + mb_width + 2\
661
     * - encoding: Set by user.\
662
     * - decoding: Set by libavcodec.\
663
     */\
664
    uint32_t *mb_type;\
665
\
666
    /**\
667
     * log2 of the size of the block which a single vector in motion_val represents: \
668
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
669
     * - encoding: unused\
670
     * - decoding: Set by libavcodec.\
671
     */\
672
    uint8_t motion_subsample_log2;\
673
\
674
    /**\
675
     * for some private data of the user\
676
     * - encoding: unused\
677
     * - decoding: Set by user.\
678
     */\
679
    void *opaque;\
680
\
681
    /**\
682
     * error\
683
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
684
     * - decoding: unused\
685
     */\
686
    uint64_t error[4];\
687
\
688
    /**\
689
     * type of the buffer (to keep track of who has to deallocate data[*])\
690
     * - encoding: Set by the one who allocates it.\
691
     * - decoding: Set by the one who allocates it.\
692
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
693
     */\
694
    int type;\
695
    \
696
    /**\
697
     * When decoding, this signals how much the picture must be delayed.\
698
     * extra_delay = repeat_pict / (2*fps)\
699
     * - encoding: unused\
700
     * - decoding: Set by libavcodec.\
701
     */\
702
    int repeat_pict;\
703
    \
704
    /**\
705
     * \
706
     */\
707
    int qscale_type;\
708
    \
709
    /**\
710
     * The content of the picture is interlaced.\
711
     * - encoding: Set by user.\
712
     * - decoding: Set by libavcodec. (default 0)\
713
     */\
714
    int interlaced_frame;\
715
    \
716
    /**\
717
     * If the content is interlaced, is top field displayed first.\
718
     * - encoding: Set by user.\
719
     * - decoding: Set by libavcodec.\
720
     */\
721
    int top_field_first;\
722
    \
723
    /**\
724
     * Pan scan.\
725
     * - encoding: Set by user.\
726
     * - decoding: Set by libavcodec.\
727
     */\
728
    AVPanScan *pan_scan;\
729
    \
730
    /**\
731
     * Tell user application that palette has changed from previous frame.\
732
     * - encoding: ??? (no palette-enabled encoder yet)\
733
     * - decoding: Set by libavcodec. (default 0).\
734
     */\
735
    int palette_has_changed;\
736
    \
737
    /**\
738
     * codec suggestion on buffer type if != 0\
739
     * - encoding: unused\
740
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
741
     */\
742
    int buffer_hints;\
743
\
744
    /**\
745
     * DCT coefficients\
746
     * - encoding: unused\
747
     * - decoding: Set by libavcodec.\
748
     */\
749
    short *dct_coeff;\
750
\
751
    /**\
752
     * motion referece frame index\
753
     * - encoding: Set by user.\
754
     * - decoding: Set by libavcodec.\
755
     */\
756
    int8_t *ref_index[2];
757

    
758
#define FF_QSCALE_TYPE_MPEG1 0
759
#define FF_QSCALE_TYPE_MPEG2 1
760
#define FF_QSCALE_TYPE_H264  2
761

    
762
#define FF_BUFFER_TYPE_INTERNAL 1
763
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
764
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
765
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
766

    
767

    
768
#define FF_I_TYPE  1 ///< Intra
769
#define FF_P_TYPE  2 ///< Predicted
770
#define FF_B_TYPE  3 ///< Bi-dir predicted
771
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
772
#define FF_SI_TYPE 5 ///< Switching Intra
773
#define FF_SP_TYPE 6 ///< Switching Predicted
774
#define FF_BI_TYPE 7
775

    
776
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
777
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
778
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
779
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
780

    
781
/**
782
 * Audio Video Frame.
783
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
784
 * bumps.
785
 * Removal, reordering and changes to existing fields require a major
786
 * version bump. No fields should be added into AVFrame before or after
787
 * FF_COMMON_FRAME!
788
 * sizeof(AVFrame) must not be used outside libav*.
789
 */
790
typedef struct AVFrame {
791
    FF_COMMON_FRAME
792
} AVFrame;
793

    
794
#define DEFAULT_FRAME_RATE_BASE 1001000
795

    
796
/**
797
 * main external API structure.
798
 * New fields can be added to the end with minor version bumps.
799
 * Removal, reordering and changes to existing fields require a major
800
 * version bump.
801
 * sizeof(AVCodecContext) must not be used outside libav*.
802
 */
803
typedef struct AVCodecContext {
804
    /**
805
     * information on struct for av_log
806
     * - set by avcodec_alloc_context
807
     */
808
    const AVClass *av_class;
809
    /**
810
     * the average bitrate
811
     * - encoding: Set by user; unused for constant quantizer encoding.
812
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
813
     */
814
    int bit_rate;
815

    
816
    /**
817
     * number of bits the bitstream is allowed to diverge from the reference.
818
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
819
     * - encoding: Set by user; unused for constant quantizer encoding.
820
     * - decoding: unused
821
     */
822
    int bit_rate_tolerance;
823

    
824
    /**
825
     * CODEC_FLAG_*.
826
     * - encoding: Set by user.
827
     * - decoding: Set by user.
828
     */
829
    int flags;
830

    
831
    /**
832
     * Some codecs need additional format info. It is stored here.
833
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
834
     * specific codec MUST set it correctly otherwise stream copy breaks.
835
     * In general use of this field by muxers is not recommanded.
836
     * - encoding: Set by libavcodec.
837
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
838
     */
839
    int sub_id;
840

    
841
    /**
842
     * Motion estimation algorithm used for video coding.
843
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
844
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
845
     * - encoding: MUST be set by user.
846
     * - decoding: unused
847
     */
848
    int me_method;
849

    
850
    /**
851
     * some codecs need / can use extradata like Huffman tables.
852
     * mjpeg: Huffman tables
853
     * rv10: additional flags
854
     * mpeg4: global headers (they can be in the bitstream or here)
855
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
856
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
857
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
858
     * - encoding: Set/allocated/freed by libavcodec.
859
     * - decoding: Set/allocated/freed by user.
860
     */
861
    uint8_t *extradata;
862
    int extradata_size;
863

    
864
    /**
865
     * This is the fundamental unit of time (in seconds) in terms
866
     * of which frame timestamps are represented. For fixed-fps content,
867
     * timebase should be 1/framerate and timestamp increments should be
868
     * identically 1.
869
     * - encoding: MUST be set by user.
870
     * - decoding: Set by libavcodec.
871
     */
872
    AVRational time_base;
873

    
874
    /* video only */
875
    /**
876
     * picture width / height.
877
     * - encoding: MUST be set by user.
878
     * - decoding: Set by libavcodec.
879
     * Note: For compatibility it is possible to set this instead of
880
     * coded_width/height before decoding.
881
     */
882
    int width, height;
883

    
884
#define FF_ASPECT_EXTENDED 15
885

    
886
    /**
887
     * the number of pictures in a group of pictures, or 0 for intra_only
888
     * - encoding: Set by user.
889
     * - decoding: unused
890
     */
891
    int gop_size;
892

    
893
    /**
894
     * Pixel format, see PIX_FMT_xxx.
895
     * - encoding: Set by user.
896
     * - decoding: Set by libavcodec.
897
     */
898
    enum PixelFormat pix_fmt;
899

    
900
    /**
901
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
902
     * has to read frames at native frame rate.
903
     * - encoding: Set by user.
904
     * - decoding: unused
905
     */
906
    int rate_emu;
907

    
908
    /**
909
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
910
     * decoder to draw a horizontal band. It improves cache usage. Not
911
     * all codecs can do that. You must check the codec capabilities
912
     * beforehand.
913
     * - encoding: unused
914
     * - decoding: Set by user.
915
     * @param height the height of the slice
916
     * @param y the y position of the slice
917
     * @param type 1->top field, 2->bottom field, 3->frame
918
     * @param offset offset into the AVFrame.data from which the slice should be read
919
     */
920
    void (*draw_horiz_band)(struct AVCodecContext *s,
921
                            const AVFrame *src, int offset[4],
922
                            int y, int type, int height);
923

    
924
    /* audio only */
925
    int sample_rate; ///< samples per second
926
    int channels;    ///< number of audio channels
927

    
928
    /**
929
     * audio sample format
930
     * - encoding: Set by user.
931
     * - decoding: Set by libavcodec.
932
     */
933
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
934

    
935
    /* The following data should not be initialized. */
936
    /**
937
     * Samples per packet, initialized when calling 'init'.
938
     */
939
    int frame_size;
940
    int frame_number;   ///< audio or video frame number
941
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
942

    
943
    /**
944
     * Number of frames the decoded output will be delayed relative to
945
     * the encoded input.
946
     * - encoding: Set by libavcodec.
947
     * - decoding: unused
948
     */
949
    int delay;
950

    
951
    /* - encoding parameters */
952
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
953
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
954

    
955
    /**
956
     * minimum quantizer
957
     * - encoding: Set by user.
958
     * - decoding: unused
959
     */
960
    int qmin;
961

    
962
    /**
963
     * maximum quantizer
964
     * - encoding: Set by user.
965
     * - decoding: unused
966
     */
967
    int qmax;
968

    
969
    /**
970
     * maximum quantizer difference between frames
971
     * - encoding: Set by user.
972
     * - decoding: unused
973
     */
974
    int max_qdiff;
975

    
976
    /**
977
     * maximum number of B-frames between non-B-frames
978
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
979
     * - encoding: Set by user.
980
     * - decoding: unused
981
     */
982
    int max_b_frames;
983

    
984
    /**
985
     * qscale factor between IP and B-frames
986
     * - encoding: Set by user.
987
     * - decoding: unused
988
     */
989
    float b_quant_factor;
990

    
991
    /** obsolete FIXME remove */
992
    int rc_strategy;
993
#define FF_RC_STRATEGY_XVID 1
994

    
995
    int b_frame_strategy;
996

    
997
    /**
998
     * hurry up amount
999
     * - encoding: unused
1000
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1001
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1002
     */
1003
    int hurry_up;
1004

    
1005
    struct AVCodec *codec;
1006

    
1007
    void *priv_data;
1008

    
1009
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1010
    /* unused, FIXME remove*/
1011
    int rtp_mode;
1012
#endif
1013

    
1014
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1015
                            /* do its best to deliver a chunk with size     */
1016
                            /* below rtp_payload_size, the chunk will start */
1017
                            /* with a start code on some codecs like H.263. */
1018
                            /* This doesn't take account of any particular  */
1019
                            /* headers inside the transmitted RTP payload.  */
1020

    
1021

    
1022
    /* The RTP callback: This function is called    */
1023
    /* every time the encoder has a packet to send. */
1024
    /* It depends on the encoder if the data starts */
1025
    /* with a Start Code (it should). H.263 does.   */
1026
    /* mb_nb contains the number of macroblocks     */
1027
    /* encoded in the RTP payload.                  */
1028
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1029

    
1030
    /* statistics, used for 2-pass encoding */
1031
    int mv_bits;
1032
    int header_bits;
1033
    int i_tex_bits;
1034
    int p_tex_bits;
1035
    int i_count;
1036
    int p_count;
1037
    int skip_count;
1038
    int misc_bits;
1039

    
1040
    /**
1041
     * number of bits used for the previously encoded frame
1042
     * - encoding: Set by libavcodec.
1043
     * - decoding: unused
1044
     */
1045
    int frame_bits;
1046

    
1047
    /**
1048
     * Private data of the user, can be used to carry app specific stuff.
1049
     * - encoding: Set by user.
1050
     * - decoding: Set by user.
1051
     */
1052
    void *opaque;
1053

    
1054
    char codec_name[32];
1055
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1056
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1057

    
1058
    /**
1059
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1060
     * This is used to work around some encoder bugs.
1061
     * A demuxer should set this to what is stored in the field used to identify the codec.
1062
     * If there are multiple such fields in a container then the demuxer should choose the one
1063
     * which maximizes the information about the used codec.
1064
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1065
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1066
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1067
     * first.
1068
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1069
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1070
     */
1071
    unsigned int codec_tag;
1072

    
1073
    /**
1074
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1075
     * - encoding: Set by user
1076
     * - decoding: Set by user
1077
     */
1078
    int workaround_bugs;
1079
#define FF_BUG_AUTODETECT       1  ///< autodetection
1080
#define FF_BUG_OLD_MSMPEG4      2
1081
#define FF_BUG_XVID_ILACE       4
1082
#define FF_BUG_UMP4             8
1083
#define FF_BUG_NO_PADDING       16
1084
#define FF_BUG_AMV              32
1085
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1086
#define FF_BUG_QPEL_CHROMA      64
1087
#define FF_BUG_STD_QPEL         128
1088
#define FF_BUG_QPEL_CHROMA2     256
1089
#define FF_BUG_DIRECT_BLOCKSIZE 512
1090
#define FF_BUG_EDGE             1024
1091
#define FF_BUG_HPEL_CHROMA      2048
1092
#define FF_BUG_DC_CLIP          4096
1093
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1094
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1095

    
1096
    /**
1097
     * luma single coefficient elimination threshold
1098
     * - encoding: Set by user.
1099
     * - decoding: unused
1100
     */
1101
    int luma_elim_threshold;
1102

    
1103
    /**
1104
     * chroma single coeff elimination threshold
1105
     * - encoding: Set by user.
1106
     * - decoding: unused
1107
     */
1108
    int chroma_elim_threshold;
1109

    
1110
    /**
1111
     * strictly follow the standard (MPEG4, ...).
1112
     * - encoding: Set by user.
1113
     * - decoding: unused
1114
     */
1115
    int strict_std_compliance;
1116
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1117
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1118
#define FF_COMPLIANCE_NORMAL        0
1119
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1120
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1121

    
1122
    /**
1123
     * qscale offset between IP and B-frames
1124
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1125
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1126
     * - encoding: Set by user.
1127
     * - decoding: unused
1128
     */
1129
    float b_quant_offset;
1130

    
1131
    /**
1132
     * Error resilience; higher values will detect more errors but may
1133
     * misdetect some more or less valid parts as errors.
1134
     * - encoding: unused
1135
     * - decoding: Set by user.
1136
     */
1137
    int error_resilience;
1138
#define FF_ER_CAREFUL         1
1139
#define FF_ER_COMPLIANT       2
1140
#define FF_ER_AGGRESSIVE      3
1141
#define FF_ER_VERY_AGGRESSIVE 4
1142

    
1143
    /**
1144
     * Called at the beginning of each frame to get a buffer for it.
1145
     * If pic.reference is set then the frame will be read later by libavcodec.
1146
     * avcodec_align_dimensions() should be used to find the required width and
1147
     * height, as they normally need to be rounded up to the next multiple of 16.
1148
     * - encoding: unused
1149
     * - decoding: Set by libavcodec., user can override.
1150
     */
1151
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1152

    
1153
    /**
1154
     * Called to release buffers which were allocated with get_buffer.
1155
     * A released buffer can be reused in get_buffer().
1156
     * pic.data[*] must be set to NULL.
1157
     * - encoding: unused
1158
     * - decoding: Set by libavcodec., user can override.
1159
     */
1160
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1161

    
1162
    /**
1163
     * If 1 the stream has a 1 frame delay during decoding.
1164
     * - encoding: Set by libavcodec.
1165
     * - decoding: Set by libavcodec.
1166
     */
1167
    int has_b_frames;
1168

    
1169
    /**
1170
     * number of bytes per packet if constant and known or 0
1171
     * Used by some WAV based audio codecs.
1172
     */
1173
    int block_align;
1174

    
1175
    int parse_only; /* - decoding only: If true, only parsing is done
1176
                       (function avcodec_parse_frame()). The frame
1177
                       data is returned. Only MPEG codecs support this now. */
1178

    
1179
    /**
1180
     * 0-> h263 quant 1-> mpeg quant
1181
     * - encoding: Set by user.
1182
     * - decoding: unused
1183
     */
1184
    int mpeg_quant;
1185

    
1186
    /**
1187
     * pass1 encoding statistics output buffer
1188
     * - encoding: Set by libavcodec.
1189
     * - decoding: unused
1190
     */
1191
    char *stats_out;
1192

    
1193
    /**
1194
     * pass2 encoding statistics input buffer
1195
     * Concatenated stuff from stats_out of pass1 should be placed here.
1196
     * - encoding: Allocated/set/freed by user.
1197
     * - decoding: unused
1198
     */
1199
    char *stats_in;
1200

    
1201
    /**
1202
     * ratecontrol qmin qmax limiting method
1203
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1204
     * - encoding: Set by user.
1205
     * - decoding: unused
1206
     */
1207
    float rc_qsquish;
1208

    
1209
    float rc_qmod_amp;
1210
    int rc_qmod_freq;
1211

    
1212
    /**
1213
     * ratecontrol override, see RcOverride
1214
     * - encoding: Allocated/set/freed by user.
1215
     * - decoding: unused
1216
     */
1217
    RcOverride *rc_override;
1218
    int rc_override_count;
1219

    
1220
    /**
1221
     * rate control equation
1222
     * - encoding: Set by user
1223
     * - decoding: unused
1224
     */
1225
    const char *rc_eq;
1226

    
1227
    /**
1228
     * maximum bitrate
1229
     * - encoding: Set by user.
1230
     * - decoding: unused
1231
     */
1232
    int rc_max_rate;
1233

    
1234
    /**
1235
     * minimum bitrate
1236
     * - encoding: Set by user.
1237
     * - decoding: unused
1238
     */
1239
    int rc_min_rate;
1240

    
1241
    /**
1242
     * decoder bitstream buffer size
1243
     * - encoding: Set by user.
1244
     * - decoding: unused
1245
     */
1246
    int rc_buffer_size;
1247
    float rc_buffer_aggressivity;
1248

    
1249
    /**
1250
     * qscale factor between P and I-frames
1251
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1252
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1253
     * - encoding: Set by user.
1254
     * - decoding: unused
1255
     */
1256
    float i_quant_factor;
1257

    
1258
    /**
1259
     * qscale offset between P and I-frames
1260
     * - encoding: Set by user.
1261
     * - decoding: unused
1262
     */
1263
    float i_quant_offset;
1264

    
1265
    /**
1266
     * initial complexity for pass1 ratecontrol
1267
     * - encoding: Set by user.
1268
     * - decoding: unused
1269
     */
1270
    float rc_initial_cplx;
1271

    
1272
    /**
1273
     * DCT algorithm, see FF_DCT_* below
1274
     * - encoding: Set by user.
1275
     * - decoding: unused
1276
     */
1277
    int dct_algo;
1278
#define FF_DCT_AUTO    0
1279
#define FF_DCT_FASTINT 1
1280
#define FF_DCT_INT     2
1281
#define FF_DCT_MMX     3
1282
#define FF_DCT_MLIB    4
1283
#define FF_DCT_ALTIVEC 5
1284
#define FF_DCT_FAAN    6
1285

    
1286
    /**
1287
     * luminance masking (0-> disabled)
1288
     * - encoding: Set by user.
1289
     * - decoding: unused
1290
     */
1291
    float lumi_masking;
1292

    
1293
    /**
1294
     * temporary complexity masking (0-> disabled)
1295
     * - encoding: Set by user.
1296
     * - decoding: unused
1297
     */
1298
    float temporal_cplx_masking;
1299

    
1300
    /**
1301
     * spatial complexity masking (0-> disabled)
1302
     * - encoding: Set by user.
1303
     * - decoding: unused
1304
     */
1305
    float spatial_cplx_masking;
1306

    
1307
    /**
1308
     * p block masking (0-> disabled)
1309
     * - encoding: Set by user.
1310
     * - decoding: unused
1311
     */
1312
    float p_masking;
1313

    
1314
    /**
1315
     * darkness masking (0-> disabled)
1316
     * - encoding: Set by user.
1317
     * - decoding: unused
1318
     */
1319
    float dark_masking;
1320

    
1321

    
1322
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1323
    /* for binary compatibility */
1324
    int unused;
1325
#endif
1326

    
1327
    /**
1328
     * IDCT algorithm, see FF_IDCT_* below.
1329
     * - encoding: Set by user.
1330
     * - decoding: Set by user.
1331
     */
1332
    int idct_algo;
1333
#define FF_IDCT_AUTO          0
1334
#define FF_IDCT_INT           1
1335
#define FF_IDCT_SIMPLE        2
1336
#define FF_IDCT_SIMPLEMMX     3
1337
#define FF_IDCT_LIBMPEG2MMX   4
1338
#define FF_IDCT_PS2           5
1339
#define FF_IDCT_MLIB          6
1340
#define FF_IDCT_ARM           7
1341
#define FF_IDCT_ALTIVEC       8
1342
#define FF_IDCT_SH4           9
1343
#define FF_IDCT_SIMPLEARM     10
1344
#define FF_IDCT_H264          11
1345
#define FF_IDCT_VP3           12
1346
#define FF_IDCT_IPP           13
1347
#define FF_IDCT_XVIDMMX       14
1348
#define FF_IDCT_CAVS          15
1349
#define FF_IDCT_SIMPLEARMV5TE 16
1350
#define FF_IDCT_SIMPLEARMV6   17
1351
#define FF_IDCT_SIMPLEVIS     18
1352
#define FF_IDCT_WMV2          19
1353
#define FF_IDCT_FAAN          20
1354

    
1355
    /**
1356
     * slice count
1357
     * - encoding: Set by libavcodec.
1358
     * - decoding: Set by user (or 0).
1359
     */
1360
    int slice_count;
1361
    /**
1362
     * slice offsets in the frame in bytes
1363
     * - encoding: Set/allocated by libavcodec.
1364
     * - decoding: Set/allocated by user (or NULL).
1365
     */
1366
    int *slice_offset;
1367

    
1368
    /**
1369
     * error concealment flags
1370
     * - encoding: unused
1371
     * - decoding: Set by user.
1372
     */
1373
    int error_concealment;
1374
#define FF_EC_GUESS_MVS   1
1375
#define FF_EC_DEBLOCK     2
1376

    
1377
    /**
1378
     * dsp_mask could be add used to disable unwanted CPU features
1379
     * CPU features (i.e. MMX, SSE. ...)
1380
     *
1381
     * With the FORCE flag you may instead enable given CPU features.
1382
     * (Dangerous: Usable in case of misdetection, improper usage however will
1383
     * result into program crash.)
1384
     */
1385
    unsigned dsp_mask;
1386
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1387
    /* lower 16 bits - CPU features */
1388
#define FF_MM_MMX      0x0001 ///< standard MMX
1389
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1390
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1391
#define FF_MM_SSE      0x0008 ///< SSE functions
1392
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1393
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1394
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1395
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1396
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1397

    
1398
    /**
1399
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1400
     * - encoding: Set by libavcodec.
1401
     * - decoding: Set by user.
1402
     */
1403
     int bits_per_sample;
1404

    
1405
    /**
1406
     * prediction method (needed for huffyuv)
1407
     * - encoding: Set by user.
1408
     * - decoding: unused
1409
     */
1410
     int prediction_method;
1411
#define FF_PRED_LEFT   0
1412
#define FF_PRED_PLANE  1
1413
#define FF_PRED_MEDIAN 2
1414

    
1415
    /**
1416
     * sample aspect ratio (0 if unknown)
1417
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1418
     * - encoding: Set by user.
1419
     * - decoding: Set by libavcodec.
1420
     */
1421
    AVRational sample_aspect_ratio;
1422

    
1423
    /**
1424
     * the picture in the bitstream
1425
     * - encoding: Set by libavcodec.
1426
     * - decoding: Set by libavcodec.
1427
     */
1428
    AVFrame *coded_frame;
1429

    
1430
    /**
1431
     * debug
1432
     * - encoding: Set by user.
1433
     * - decoding: Set by user.
1434
     */
1435
    int debug;
1436
#define FF_DEBUG_PICT_INFO   1
1437
#define FF_DEBUG_RC          2
1438
#define FF_DEBUG_BITSTREAM   4
1439
#define FF_DEBUG_MB_TYPE     8
1440
#define FF_DEBUG_QP          16
1441
#define FF_DEBUG_MV          32
1442
#define FF_DEBUG_DCT_COEFF   0x00000040
1443
#define FF_DEBUG_SKIP        0x00000080
1444
#define FF_DEBUG_STARTCODE   0x00000100
1445
#define FF_DEBUG_PTS         0x00000200
1446
#define FF_DEBUG_ER          0x00000400
1447
#define FF_DEBUG_MMCO        0x00000800
1448
#define FF_DEBUG_BUGS        0x00001000
1449
#define FF_DEBUG_VIS_QP      0x00002000
1450
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1451

    
1452
    /**
1453
     * debug
1454
     * - encoding: Set by user.
1455
     * - decoding: Set by user.
1456
     */
1457
    int debug_mv;
1458
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1459
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1460
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1461

    
1462
    /**
1463
     * error
1464
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1465
     * - decoding: unused
1466
     */
1467
    uint64_t error[4];
1468

    
1469
    /**
1470
     * minimum MB quantizer
1471
     * - encoding: unused
1472
     * - decoding: unused
1473
     */
1474
    int mb_qmin;
1475

    
1476
    /**
1477
     * maximum MB quantizer
1478
     * - encoding: unused
1479
     * - decoding: unused
1480
     */
1481
    int mb_qmax;
1482

    
1483
    /**
1484
     * motion estimation comparison function
1485
     * - encoding: Set by user.
1486
     * - decoding: unused
1487
     */
1488
    int me_cmp;
1489
    /**
1490
     * subpixel motion estimation comparison function
1491
     * - encoding: Set by user.
1492
     * - decoding: unused
1493
     */
1494
    int me_sub_cmp;
1495
    /**
1496
     * macroblock comparison function (not supported yet)
1497
     * - encoding: Set by user.
1498
     * - decoding: unused
1499
     */
1500
    int mb_cmp;
1501
    /**
1502
     * interlaced DCT comparison function
1503
     * - encoding: Set by user.
1504
     * - decoding: unused
1505
     */
1506
    int ildct_cmp;
1507
#define FF_CMP_SAD    0
1508
#define FF_CMP_SSE    1
1509
#define FF_CMP_SATD   2
1510
#define FF_CMP_DCT    3
1511
#define FF_CMP_PSNR   4
1512
#define FF_CMP_BIT    5
1513
#define FF_CMP_RD     6
1514
#define FF_CMP_ZERO   7
1515
#define FF_CMP_VSAD   8
1516
#define FF_CMP_VSSE   9
1517
#define FF_CMP_NSSE   10
1518
#define FF_CMP_W53    11
1519
#define FF_CMP_W97    12
1520
#define FF_CMP_DCTMAX 13
1521
#define FF_CMP_DCT264 14
1522
#define FF_CMP_CHROMA 256
1523

    
1524
    /**
1525
     * ME diamond size & shape
1526
     * - encoding: Set by user.
1527
     * - decoding: unused
1528
     */
1529
    int dia_size;
1530

    
1531
    /**
1532
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1533
     * - encoding: Set by user.
1534
     * - decoding: unused
1535
     */
1536
    int last_predictor_count;
1537

    
1538
    /**
1539
     * prepass for motion estimation
1540
     * - encoding: Set by user.
1541
     * - decoding: unused
1542
     */
1543
    int pre_me;
1544

    
1545
    /**
1546
     * motion estimation prepass comparison function
1547
     * - encoding: Set by user.
1548
     * - decoding: unused
1549
     */
1550
    int me_pre_cmp;
1551

    
1552
    /**
1553
     * ME prepass diamond size & shape
1554
     * - encoding: Set by user.
1555
     * - decoding: unused
1556
     */
1557
    int pre_dia_size;
1558

    
1559
    /**
1560
     * subpel ME quality
1561
     * - encoding: Set by user.
1562
     * - decoding: unused
1563
     */
1564
    int me_subpel_quality;
1565

    
1566
    /**
1567
     * callback to negotiate the pixelFormat
1568
     * @param fmt is the list of formats which are supported by the codec,
1569
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1570
     * The first is always the native one.
1571
     * @return the chosen format
1572
     * - encoding: unused
1573
     * - decoding: Set by user, if not set the native format will be chosen.
1574
     */
1575
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1576

    
1577
    /**
1578
     * DTG active format information (additional aspect ratio
1579
     * information only used in DVB MPEG-2 transport streams)
1580
     * 0 if not set.
1581
     *
1582
     * - encoding: unused
1583
     * - decoding: Set by decoder.
1584
     */
1585
    int dtg_active_format;
1586
#define FF_DTG_AFD_SAME         8
1587
#define FF_DTG_AFD_4_3          9
1588
#define FF_DTG_AFD_16_9         10
1589
#define FF_DTG_AFD_14_9         11
1590
#define FF_DTG_AFD_4_3_SP_14_9  13
1591
#define FF_DTG_AFD_16_9_SP_14_9 14
1592
#define FF_DTG_AFD_SP_4_3       15
1593

    
1594
    /**
1595
     * maximum motion estimation search range in subpel units
1596
     * If 0 then no limit.
1597
     *
1598
     * - encoding: Set by user.
1599
     * - decoding: unused
1600
     */
1601
    int me_range;
1602

    
1603
    /**
1604
     * intra quantizer bias
1605
     * - encoding: Set by user.
1606
     * - decoding: unused
1607
     */
1608
    int intra_quant_bias;
1609
#define FF_DEFAULT_QUANT_BIAS 999999
1610

    
1611
    /**
1612
     * inter quantizer bias
1613
     * - encoding: Set by user.
1614
     * - decoding: unused
1615
     */
1616
    int inter_quant_bias;
1617

    
1618
    /**
1619
     * color table ID
1620
     * - encoding: unused
1621
     * - decoding: Which clrtable should be used for 8bit RGB images.
1622
     *             Tables have to be stored somewhere. FIXME
1623
     */
1624
    int color_table_id;
1625

    
1626
    /**
1627
     * internal_buffer count
1628
     * Don't touch, used by libavcodec default_get_buffer().
1629
     */
1630
    int internal_buffer_count;
1631

    
1632
    /**
1633
     * internal_buffers
1634
     * Don't touch, used by libavcodec default_get_buffer().
1635
     */
1636
    void *internal_buffer;
1637

    
1638
#define FF_LAMBDA_SHIFT 7
1639
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1640
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1641
#define FF_LAMBDA_MAX (256*128-1)
1642

    
1643
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1644
    /**
1645
     * Global quality for codecs which cannot change it per frame.
1646
     * This should be proportional to MPEG-1/2/4 qscale.
1647
     * - encoding: Set by user.
1648
     * - decoding: unused
1649
     */
1650
    int global_quality;
1651

    
1652
#define FF_CODER_TYPE_VLC       0
1653
#define FF_CODER_TYPE_AC        1
1654
#define FF_CODER_TYPE_RAW       2
1655
#define FF_CODER_TYPE_RLE       3
1656
#define FF_CODER_TYPE_DEFLATE   4
1657
    /**
1658
     * coder type
1659
     * - encoding: Set by user.
1660
     * - decoding: unused
1661
     */
1662
    int coder_type;
1663

    
1664
    /**
1665
     * context model
1666
     * - encoding: Set by user.
1667
     * - decoding: unused
1668
     */
1669
    int context_model;
1670
#if 0
1671
    /**
1672
     *
1673
     * - encoding: unused
1674
     * - decoding: Set by user.
1675
     */
1676
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1677
#endif
1678

    
1679
    /**
1680
     * slice flags
1681
     * - encoding: unused
1682
     * - decoding: Set by user.
1683
     */
1684
    int slice_flags;
1685
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1686
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1687
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1688

    
1689
    /**
1690
     * XVideo Motion Acceleration
1691
     * - encoding: forbidden
1692
     * - decoding: set by decoder
1693
     */
1694
    int xvmc_acceleration;
1695

    
1696
    /**
1697
     * macroblock decision mode
1698
     * - encoding: Set by user.
1699
     * - decoding: unused
1700
     */
1701
    int mb_decision;
1702
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1703
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1704
#define FF_MB_DECISION_RD     2        ///< rate distortion
1705

    
1706
    /**
1707
     * custom intra quantization matrix
1708
     * - encoding: Set by user, can be NULL.
1709
     * - decoding: Set by libavcodec.
1710
     */
1711
    uint16_t *intra_matrix;
1712

    
1713
    /**
1714
     * custom inter quantization matrix
1715
     * - encoding: Set by user, can be NULL.
1716
     * - decoding: Set by libavcodec.
1717
     */
1718
    uint16_t *inter_matrix;
1719

    
1720
    /**
1721
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1722
     * This is used to work around some encoder bugs.
1723
     * - encoding: unused
1724
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1725
     */
1726
    unsigned int stream_codec_tag;
1727

    
1728
    /**
1729
     * scene change detection threshold
1730
     * 0 is default, larger means fewer detected scene changes.
1731
     * - encoding: Set by user.
1732
     * - decoding: unused
1733
     */
1734
    int scenechange_threshold;
1735

    
1736
    /**
1737
     * minimum Lagrange multipler
1738
     * - encoding: Set by user.
1739
     * - decoding: unused
1740
     */
1741
    int lmin;
1742

    
1743
    /**
1744
     * maximum Lagrange multipler
1745
     * - encoding: Set by user.
1746
     * - decoding: unused
1747
     */
1748
    int lmax;
1749

    
1750
    /**
1751
     * palette control structure
1752
     * - encoding: ??? (no palette-enabled encoder yet)
1753
     * - decoding: Set by user.
1754
     */
1755
    struct AVPaletteControl *palctrl;
1756

    
1757
    /**
1758
     * noise reduction strength
1759
     * - encoding: Set by user.
1760
     * - decoding: unused
1761
     */
1762
    int noise_reduction;
1763

    
1764
    /**
1765
     * Called at the beginning of a frame to get cr buffer for it.
1766
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1767
     * libavcodec will pass previous buffer in pic, function should return
1768
     * same buffer or new buffer with old frame "painted" into it.
1769
     * If pic.data[0] == NULL must behave like get_buffer().
1770
     * - encoding: unused
1771
     * - decoding: Set by libavcodec., user can override
1772
     */
1773
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1774

    
1775
    /**
1776
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1777
     * - encoding: Set by user.
1778
     * - decoding: unused
1779
     */
1780
    int rc_initial_buffer_occupancy;
1781

    
1782
    /**
1783
     *
1784
     * - encoding: Set by user.
1785
     * - decoding: unused
1786
     */
1787
    int inter_threshold;
1788

    
1789
    /**
1790
     * CODEC_FLAG2_*
1791
     * - encoding: Set by user.
1792
     * - decoding: Set by user.
1793
     */
1794
    int flags2;
1795

    
1796
    /**
1797
     * Simulates errors in the bitstream to test error concealment.
1798
     * - encoding: Set by user.
1799
     * - decoding: unused
1800
     */
1801
    int error_rate;
1802

    
1803
    /**
1804
     * MP3 antialias algorithm, see FF_AA_* below.
1805
     * - encoding: unused
1806
     * - decoding: Set by user.
1807
     */
1808
    int antialias_algo;
1809
#define FF_AA_AUTO    0
1810
#define FF_AA_FASTINT 1 //not implemented yet
1811
#define FF_AA_INT     2
1812
#define FF_AA_FLOAT   3
1813
    /**
1814
     * quantizer noise shaping
1815
     * - encoding: Set by user.
1816
     * - decoding: unused
1817
     */
1818
    int quantizer_noise_shaping;
1819

    
1820
    /**
1821
     * thread count
1822
     * is used to decide how many independent tasks should be passed to execute()
1823
     * - encoding: Set by user.
1824
     * - decoding: Set by user.
1825
     */
1826
    int thread_count;
1827

    
1828
    /**
1829
     * The codec may call this to execute several independent things.
1830
     * It will return only after finishing all tasks.
1831
     * The user may replace this with some multithreaded implementation,
1832
     * the default implementation will execute the parts serially.
1833
     * @param count the number of things to execute
1834
     * - encoding: Set by libavcodec, user can override.
1835
     * - decoding: Set by libavcodec, user can override.
1836
     */
1837
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1838

    
1839
    /**
1840
     * thread opaque
1841
     * Can be used by execute() to store some per AVCodecContext stuff.
1842
     * - encoding: set by execute()
1843
     * - decoding: set by execute()
1844
     */
1845
    void *thread_opaque;
1846

    
1847
    /**
1848
     * Motion estimation threshold below which no motion estimation is
1849
     * performed, but instead the user specified motion vectors are used.
1850
     *
1851
     * - encoding: Set by user.
1852
     * - decoding: unused
1853
     */
1854
     int me_threshold;
1855

    
1856
    /**
1857
     * Macroblock threshold below which the user specified macroblock types will be used.
1858
     * - encoding: Set by user.
1859
     * - decoding: unused
1860
     */
1861
     int mb_threshold;
1862

    
1863
    /**
1864
     * precision of the intra DC coefficient - 8
1865
     * - encoding: Set by user.
1866
     * - decoding: unused
1867
     */
1868
     int intra_dc_precision;
1869

    
1870
    /**
1871
     * noise vs. sse weight for the nsse comparsion function
1872
     * - encoding: Set by user.
1873
     * - decoding: unused
1874
     */
1875
     int nsse_weight;
1876

    
1877
    /**
1878
     * Number of macroblock rows at the top which are skipped.
1879
     * - encoding: unused
1880
     * - decoding: Set by user.
1881
     */
1882
     int skip_top;
1883

    
1884
    /**
1885
     * Number of macroblock rows at the bottom which are skipped.
1886
     * - encoding: unused
1887
     * - decoding: Set by user.
1888
     */
1889
     int skip_bottom;
1890

    
1891
    /**
1892
     * profile
1893
     * - encoding: Set by user.
1894
     * - decoding: Set by libavcodec.
1895
     */
1896
     int profile;
1897
#define FF_PROFILE_UNKNOWN -99
1898
#define FF_PROFILE_AAC_MAIN 0
1899
#define FF_PROFILE_AAC_LOW  1
1900
#define FF_PROFILE_AAC_SSR  2
1901
#define FF_PROFILE_AAC_LTP  3
1902

    
1903
    /**
1904
     * level
1905
     * - encoding: Set by user.
1906
     * - decoding: Set by libavcodec.
1907
     */
1908
     int level;
1909
#define FF_LEVEL_UNKNOWN -99
1910

    
1911
    /**
1912
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1913
     * - encoding: unused
1914
     * - decoding: Set by user.
1915
     */
1916
     int lowres;
1917

    
1918
    /**
1919
     * Bitstream width / height, may be different from width/height if lowres
1920
     * or other things are used.
1921
     * - encoding: unused
1922
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1923
     */
1924
    int coded_width, coded_height;
1925

    
1926
    /**
1927
     * frame skip threshold
1928
     * - encoding: Set by user.
1929
     * - decoding: unused
1930
     */
1931
    int frame_skip_threshold;
1932

    
1933
    /**
1934
     * frame skip factor
1935
     * - encoding: Set by user.
1936
     * - decoding: unused
1937
     */
1938
    int frame_skip_factor;
1939

    
1940
    /**
1941
     * frame skip exponent
1942
     * - encoding: Set by user.
1943
     * - decoding: unused
1944
     */
1945
    int frame_skip_exp;
1946

    
1947
    /**
1948
     * frame skip comparison function
1949
     * - encoding: Set by user.
1950
     * - decoding: unused
1951
     */
1952
    int frame_skip_cmp;
1953

    
1954
    /**
1955
     * Border processing masking, raises the quantizer for mbs on the borders
1956
     * of the picture.
1957
     * - encoding: Set by user.
1958
     * - decoding: unused
1959
     */
1960
    float border_masking;
1961

    
1962
    /**
1963
     * minimum MB lagrange multipler
1964
     * - encoding: Set by user.
1965
     * - decoding: unused
1966
     */
1967
    int mb_lmin;
1968

    
1969
    /**
1970
     * maximum MB lagrange multipler
1971
     * - encoding: Set by user.
1972
     * - decoding: unused
1973
     */
1974
    int mb_lmax;
1975

    
1976
    /**
1977
     *
1978
     * - encoding: Set by user.
1979
     * - decoding: unused
1980
     */
1981
    int me_penalty_compensation;
1982

    
1983
    /**
1984
     *
1985
     * - encoding: unused
1986
     * - decoding: Set by user.
1987
     */
1988
    enum AVDiscard skip_loop_filter;
1989

    
1990
    /**
1991
     *
1992
     * - encoding: unused
1993
     * - decoding: Set by user.
1994
     */
1995
    enum AVDiscard skip_idct;
1996

    
1997
    /**
1998
     *
1999
     * - encoding: unused
2000
     * - decoding: Set by user.
2001
     */
2002
    enum AVDiscard skip_frame;
2003

    
2004
    /**
2005
     *
2006
     * - encoding: Set by user.
2007
     * - decoding: unused
2008
     */
2009
    int bidir_refine;
2010

    
2011
    /**
2012
     *
2013
     * - encoding: Set by user.
2014
     * - decoding: unused
2015
     */
2016
    int brd_scale;
2017

    
2018
    /**
2019
     * constant rate factor - quality-based VBR - values ~correspond to qps
2020
     * - encoding: Set by user.
2021
     * - decoding: unused
2022
     */
2023
    float crf;
2024

    
2025
    /**
2026
     * constant quantization parameter rate control method
2027
     * - encoding: Set by user.
2028
     * - decoding: unused
2029
     */
2030
    int cqp;
2031

    
2032
    /**
2033
     * minimum GOP size
2034
     * - encoding: Set by user.
2035
     * - decoding: unused
2036
     */
2037
    int keyint_min;
2038

    
2039
    /**
2040
     * number of reference frames
2041
     * - encoding: Set by user.
2042
     * - decoding: unused
2043
     */
2044
    int refs;
2045

    
2046
    /**
2047
     * chroma qp offset from luma
2048
     * - encoding: Set by user.
2049
     * - decoding: unused
2050
     */
2051
    int chromaoffset;
2052

    
2053
    /**
2054
     * Influences how often B-frames are used.
2055
     * - encoding: Set by user.
2056
     * - decoding: unused
2057
     */
2058
    int bframebias;
2059

    
2060
    /**
2061
     * trellis RD quantization
2062
     * - encoding: Set by user.
2063
     * - decoding: unused
2064
     */
2065
    int trellis;
2066

    
2067
    /**
2068
     * Reduce fluctuations in qp (before curve compression).
2069
     * - encoding: Set by user.
2070
     * - decoding: unused
2071
     */
2072
    float complexityblur;
2073

    
2074
    /**
2075
     * in-loop deblocking filter alphac0 parameter
2076
     * alpha is in the range -6...6
2077
     * - encoding: Set by user.
2078
     * - decoding: unused
2079
     */
2080
    int deblockalpha;
2081

    
2082
    /**
2083
     * in-loop deblocking filter beta parameter
2084
     * beta is in the range -6...6
2085
     * - encoding: Set by user.
2086
     * - decoding: unused
2087
     */
2088
    int deblockbeta;
2089

    
2090
    /**
2091
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2092
     * - encoding: Set by user.
2093
     * - decoding: unused
2094
     */
2095
    int partitions;
2096
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2097
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2098
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2099
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2100
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2101

    
2102
    /**
2103
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2104
     * - encoding: Set by user.
2105
     * - decoding: unused
2106
     */
2107
    int directpred;
2108

    
2109
    /**
2110
     * Audio cutoff bandwidth (0 means "automatic")
2111
     * - encoding: Set by user.
2112
     * - decoding: unused
2113
     */
2114
    int cutoff;
2115

    
2116
    /**
2117
     * Multiplied by qscale for each frame and added to scene_change_score.
2118
     * - encoding: Set by user.
2119
     * - decoding: unused
2120
     */
2121
    int scenechange_factor;
2122

    
2123
    /**
2124
     *
2125
     * Note: Value depends upon the compare function used for fullpel ME.
2126
     * - encoding: Set by user.
2127
     * - decoding: unused
2128
     */
2129
    int mv0_threshold;
2130

    
2131
    /**
2132
     * Adjusts sensitivity of b_frame_strategy 1.
2133
     * - encoding: Set by user.
2134
     * - decoding: unused
2135
     */
2136
    int b_sensitivity;
2137

    
2138
    /**
2139
     * - encoding: Set by user.
2140
     * - decoding: unused
2141
     */
2142
    int compression_level;
2143
#define FF_COMPRESSION_DEFAULT -1
2144

    
2145
    /**
2146
     * Sets whether to use LPC mode - used by FLAC encoder.
2147
     * - encoding: Set by user.
2148
     * - decoding: unused
2149
     */
2150
    int use_lpc;
2151

    
2152
    /**
2153
     * LPC coefficient precision - used by FLAC encoder
2154
     * - encoding: Set by user.
2155
     * - decoding: unused
2156
     */
2157
    int lpc_coeff_precision;
2158

    
2159
    /**
2160
     * - encoding: Set by user.
2161
     * - decoding: unused
2162
     */
2163
    int min_prediction_order;
2164

    
2165
    /**
2166
     * - encoding: Set by user.
2167
     * - decoding: unused
2168
     */
2169
    int max_prediction_order;
2170

    
2171
    /**
2172
     * search method for selecting prediction order
2173
     * - encoding: Set by user.
2174
     * - decoding: unused
2175
     */
2176
    int prediction_order_method;
2177

    
2178
    /**
2179
     * - encoding: Set by user.
2180
     * - decoding: unused
2181
     */
2182
    int min_partition_order;
2183

    
2184
    /**
2185
     * - encoding: Set by user.
2186
     * - decoding: unused
2187
     */
2188
    int max_partition_order;
2189

    
2190
    /**
2191
     * GOP timecode frame start number, in non drop frame format
2192
     * - encoding: Set by user.
2193
     * - decoding: unused
2194
     */
2195
    int64_t timecode_frame_start;
2196

    
2197
    /**
2198
     * Decoder should decode to this many channels if it can (0 for default)
2199
     * - encoding: unused
2200
     * - decoding: Set by user.
2201
     */
2202
    int request_channels;
2203

    
2204
    /**
2205
     * Percentage of dynamic range compression to be applied by the decoder.
2206
     * The default value is 1.0, corresponding to full compression.
2207
     * - encoding: unused
2208
     * - decoding: Set by user.
2209
     */
2210
    float drc_scale;
2211
} AVCodecContext;
2212

    
2213
/**
2214
 * AVCodec.
2215
 */
2216
typedef struct AVCodec {
2217
    /**
2218
     * Name of the codec implementation.
2219
     * The name is globally unique among encoders and among decoders (but an
2220
     * encoder and a decoder can share the same name).
2221
     * This is the primary way to find a codec from the user perspective.
2222
     */
2223
    const char *name;
2224
    enum CodecType type;
2225
    enum CodecID id;
2226
    int priv_data_size;
2227
    int (*init)(AVCodecContext *);
2228
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2229
    int (*close)(AVCodecContext *);
2230
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2231
                  const uint8_t *buf, int buf_size);
2232
    /**
2233
     * Codec capabilities.
2234
     * see CODEC_CAP_*
2235
     */
2236
    int capabilities;
2237
    struct AVCodec *next;
2238
    /**
2239
     * Flush buffers.
2240
     * Will be called when seeking
2241
     */
2242
    void (*flush)(AVCodecContext *);
2243
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2244
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2245
    const char *long_name;                  ///< descriptive name for the codec, meant to be more human readable than \p name
2246
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2247
} AVCodec;
2248

    
2249
/**
2250
 * four components are given, that's all.
2251
 * the last component is alpha
2252
 */
2253
typedef struct AVPicture {
2254
    uint8_t *data[4];
2255
    int linesize[4];       ///< number of bytes per line
2256
} AVPicture;
2257

    
2258
/**
2259
 * AVPaletteControl
2260
 * This structure defines a method for communicating palette changes
2261
 * between and demuxer and a decoder.
2262
 *
2263
 * @deprecated Use AVPacket to send palette changes instead.
2264
 * This is totally broken.
2265
 */
2266
#define AVPALETTE_SIZE 1024
2267
#define AVPALETTE_COUNT 256
2268
typedef struct AVPaletteControl {
2269

    
2270
    /* Demuxer sets this to 1 to indicate the palette has changed;
2271
     * decoder resets to 0. */
2272
    int palette_changed;
2273

    
2274
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2275
     * the individual palette components should be on a 8-bit scale; if
2276
     * the palette data comes from an IBM VGA native format, the component
2277
     * data is probably 6 bits in size and needs to be scaled. */
2278
    unsigned int palette[AVPALETTE_COUNT];
2279

    
2280
} AVPaletteControl attribute_deprecated;
2281

    
2282
typedef struct AVSubtitleRect {
2283
    uint16_t x;
2284
    uint16_t y;
2285
    uint16_t w;
2286
    uint16_t h;
2287
    uint16_t nb_colors;
2288
    int linesize;
2289
    uint32_t *rgba_palette;
2290
    uint8_t *bitmap;
2291
} AVSubtitleRect;
2292

    
2293
typedef struct AVSubtitle {
2294
    uint16_t format; /* 0 = graphics */
2295
    uint32_t start_display_time; /* relative to packet pts, in ms */
2296
    uint32_t end_display_time; /* relative to packet pts, in ms */
2297
    uint32_t num_rects;
2298
    AVSubtitleRect *rects;
2299
} AVSubtitle;
2300

    
2301

    
2302
/* resample.c */
2303

    
2304
struct ReSampleContext;
2305
struct AVResampleContext;
2306

    
2307
typedef struct ReSampleContext ReSampleContext;
2308

    
2309
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2310
                                     int output_rate, int input_rate);
2311
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2312
void audio_resample_close(ReSampleContext *s);
2313

    
2314
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2315
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2316
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2317
void av_resample_close(struct AVResampleContext *c);
2318

    
2319
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2320
/* YUV420 format is assumed ! */
2321

    
2322
/**
2323
 * @deprecated Use the software scaler (swscale) instead.
2324
 */
2325
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2326

    
2327
/**
2328
 * @deprecated Use the software scaler (swscale) instead.
2329
 */
2330
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2331
                                      int input_width, int input_height);
2332

    
2333
/**
2334
 * @deprecated Use the software scaler (swscale) instead.
2335
 */
2336
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2337
                                      int iwidth, int iheight,
2338
                                      int topBand, int bottomBand,
2339
                                      int leftBand, int rightBand,
2340
                                      int padtop, int padbottom,
2341
                                      int padleft, int padright);
2342

    
2343
/**
2344
 * @deprecated Use the software scaler (swscale) instead.
2345
 */
2346
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2347
                  AVPicture *output, const AVPicture *input);
2348

    
2349
/**
2350
 * @deprecated Use the software scaler (swscale) instead.
2351
 */
2352
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2353

    
2354
#endif
2355

    
2356
/**
2357
 * Allocate memory for a picture.  Call avpicture_free to free it.
2358
 *
2359
 * @param picture the picture to be filled in
2360
 * @param pix_fmt the format of the picture
2361
 * @param width the width of the picture
2362
 * @param height the height of the picture
2363
 * @return zero if successful, a negative value if not
2364
 */
2365
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2366

    
2367
/**
2368
 * Free a picture previously allocated by avpicture_alloc().
2369
 *
2370
 * @param picture the AVPicture to be freed
2371
 */
2372
void avpicture_free(AVPicture *picture);
2373

    
2374
/**
2375
 * Fill in the AVPicture fields.
2376
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2377
 * which points to the image data buffer. Depending on the specified picture
2378
 * format, one or multiple image data pointers and line sizes will be set.
2379
 * If a planar format is specified, several pointers will be set pointing to
2380
 * the different picture planes and the line sizes of the different planes
2381
 * will be stored in the lines_sizes array.
2382
 *
2383
 * @param picture AVPicture whose fields are to be filled in
2384
 * @param ptr Buffer which will contain or contains the actual image data
2385
 * @param pix_fmt The format in which the picture data is stored.
2386
 * @param width the width of the image in pixels
2387
 * @param height the height of the image in pixels
2388
 * @return size of the image data in bytes
2389
 */
2390
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2391
                   int pix_fmt, int width, int height);
2392
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2393
                     unsigned char *dest, int dest_size);
2394

    
2395
/**
2396
 * Calculate the size in bytes that a picture of the given width and height
2397
 * would occupy if stored in the given picture format.
2398
 *
2399
 * @param pix_fmt the given picture format
2400
 * @param width the width of the image
2401
 * @param height the height of the image
2402
 * @return Image data size in bytes
2403
 */
2404
int avpicture_get_size(int pix_fmt, int width, int height);
2405
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2406
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2407
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2408
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2409
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2410

    
2411
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2412
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2413
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2414
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2415
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2416
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2417

    
2418
/**
2419
 * Computes what kind of losses will occur when converting from one specific
2420
 * pixel format to another.
2421
 * When converting from one pixel format to another, information loss may occur.
2422
 * For example, when converting from RGB24 to GRAY, the color information will
2423
 * be lost. Similarly, other losses occur when converting from some formats to
2424
 * other formats. These losses can involve loss of chroma, but also loss of
2425
 * resolution, loss of color depth, loss due to the color space conversion, loss
2426
 * of the alpha bits or loss due to color quantization.
2427
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2428
 * which will occur when converting from one pixel format to another.
2429
 *
2430
 * @param[in] dst_pix_fmt destination pixel format
2431
 * @param[in] src_pix_fmt source pixel format
2432
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2433
 * @return Combination of flags informing you what kind of losses will occur.
2434
 */
2435
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2436
                             int has_alpha);
2437

    
2438
/**
2439
 * Finds the best pixel format to convert to given a certain source pixel
2440
 * format.  When converting from one pixel format to another, information loss
2441
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2442
 * information will be lost. Similarly, other losses occur when converting from
2443
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2444
 * the given pixel formats should be used to suffer the least amount of loss.
2445
 * The pixel formats from which it chooses one, are determined by the
2446
 * \p pix_fmt_mask parameter.
2447
 *
2448
 * @code
2449
 * src_pix_fmt = PIX_FMT_YUV420P;
2450
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2451
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2452
 * @endcode
2453
 *
2454
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2455
 * @param[in] src_pix_fmt source pixel format
2456
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2457
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2458
 * @return The best pixel format to convert to or -1 if none was found.
2459
 */
2460
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2461
                              int has_alpha, int *loss_ptr);
2462

    
2463

    
2464
/**
2465
 * Print in buf the string corresponding to the pixel format with
2466
 * number pix_fmt, or an header if pix_fmt is negative.
2467
 *
2468
 * @param[in] buf the buffer where to write the string
2469
 * @param[in] buf_size the size of buf
2470
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2471
 * a negative value to print the corresponding header.
2472
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2473
 */
2474
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2475

    
2476
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2477
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2478

    
2479
/**
2480
 * Tell if an image really has transparent alpha values.
2481
 * @return ored mask of FF_ALPHA_xxx constants
2482
 */
2483
int img_get_alpha_info(const AVPicture *src,
2484
                       int pix_fmt, int width, int height);
2485

    
2486
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2487
/**
2488
 * convert among pixel formats
2489
 * @deprecated Use the software scaler (swscale) instead.
2490
 */
2491
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2492
                const AVPicture *src, int pix_fmt,
2493
                int width, int height);
2494
#endif
2495

    
2496
/* deinterlace a picture */
2497
/* deinterlace - if not supported return -1 */
2498
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2499
                          int pix_fmt, int width, int height);
2500

    
2501
/* external high level API */
2502

    
2503
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2504
extern AVCodec *first_avcodec;
2505
#endif
2506
AVCodec *av_codec_next(AVCodec *c);
2507

    
2508
/* returns LIBAVCODEC_VERSION_INT constant */
2509
unsigned avcodec_version(void);
2510
/* returns LIBAVCODEC_BUILD constant */
2511
unsigned avcodec_build(void);
2512

    
2513
/**
2514
 * Initializes libavcodec.
2515
 *
2516
 * @warning This function \e must be called before any other libavcodec
2517
 * function.
2518
 */
2519
void avcodec_init(void);
2520

    
2521
void register_avcodec(AVCodec *format);
2522

    
2523
/**
2524
 * Finds a registered encoder with a matching codec ID.
2525
 *
2526
 * @param id CodecID of the requested encoder
2527
 * @return An encoder if one was found, NULL otherwise.
2528
 */
2529
AVCodec *avcodec_find_encoder(enum CodecID id);
2530

    
2531
/**
2532
 * Finds a registered encoder with the specified name.
2533
 *
2534
 * @param name name of the requested encoder
2535
 * @return An encoder if one was found, NULL otherwise.
2536
 */
2537
AVCodec *avcodec_find_encoder_by_name(const char *name);
2538

    
2539
/**
2540
 * Finds a registered decoder with a matching codec ID.
2541
 *
2542
 * @param id CodecID of the requested decoder
2543
 * @return A decoder if one was found, NULL otherwise.
2544
 */
2545
AVCodec *avcodec_find_decoder(enum CodecID id);
2546

    
2547
/**
2548
 * Finds a registered decoder with the specified name.
2549
 *
2550
 * @param name name of the requested decoder
2551
 * @return A decoder if one was found, NULL otherwise.
2552
 */
2553
AVCodec *avcodec_find_decoder_by_name(const char *name);
2554
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2555

    
2556
/**
2557
 * Sets the fields of the given AVCodecContext to default values.
2558
 *
2559
 * @param s The AVCodecContext of which the fields should be set to default values.
2560
 */
2561
void avcodec_get_context_defaults(AVCodecContext *s);
2562

    
2563
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2564
 *  we WILL change its arguments and name a few times! */
2565
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2566

    
2567
/**
2568
 * Allocates an AVCodecContext and sets its fields to default values.  The
2569
 * resulting struct can be deallocated by simply calling av_free().
2570
 *
2571
 * @return An AVCodecContext filled with default values or NULL on failure.
2572
 * @see avcodec_get_context_defaults
2573
 */
2574
AVCodecContext *avcodec_alloc_context(void);
2575

    
2576
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2577
 *  we WILL change its arguments and name a few times! */
2578
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2579

    
2580
/**
2581
 * Sets the fields of the given AVFrame to default values.
2582
 *
2583
 * @param pic The AVFrame of which the fields should be set to default values.
2584
 */
2585
void avcodec_get_frame_defaults(AVFrame *pic);
2586

    
2587
/**
2588
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2589
 * struct can be deallocated by simply calling av_free().
2590
 *
2591
 * @return An AVFrame filled with default values or NULL on failure.
2592
 * @see avcodec_get_frame_defaults
2593
 */
2594
AVFrame *avcodec_alloc_frame(void);
2595

    
2596
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2597
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2598
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2599
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2600

    
2601
/**
2602
 * Checks if the given dimension of a picture is valid, meaning that all
2603
 * bytes of the picture can be addressed with a signed int.
2604
 *
2605
 * @param[in] w Width of the picture.
2606
 * @param[in] h Height of the picture.
2607
 * @return Zero if valid, a negative value if invalid.
2608
 */
2609
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2610
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2611

    
2612
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2613
void avcodec_thread_free(AVCodecContext *s);
2614
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2615
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2616
//FIXME func typedef
2617

    
2618
/**
2619
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2620
 * function the context has to be allocated.
2621
 *
2622
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2623
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2624
 * retrieving a codec.
2625
 *
2626
 * @warning This function is not thread safe!
2627
 *
2628
 * @code
2629
 * avcodec_register_all();
2630
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2631
 * if (!codec)
2632
 *     exit(1);
2633
 *
2634
 * context = avcodec_alloc_context();
2635
 *
2636
 * if (avcodec_open(context, codec) < 0)
2637
 *     exit(1);
2638
 * @endcode
2639
 *
2640
 * @param avctx The context which will be set up to use the given codec.
2641
 * @param codec The codec to use within the context.
2642
 * @return zero on success, a negative value on error
2643
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2644
 */
2645
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2646

    
2647
/**
2648
 * @deprecated Use avcodec_decode_audio2() instead.
2649
 */
2650
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2651
                         int *frame_size_ptr,
2652
                         const uint8_t *buf, int buf_size);
2653

    
2654
/**
2655
 * Decodes an audio frame from \p buf into \p samples.
2656
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2657
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2658
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2659
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2660
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2661
 * decompressed frame size in \e bytes.
2662
 *
2663
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2664
 * output buffer before calling avcodec_decode_audio2().
2665
 *
2666
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2667
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2668
 * bits at once and could read over the end.
2669
 *
2670
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2671
 * no overreading happens for damaged MPEG streams.
2672
 *
2673
 * @note You might have to align the input buffer \p buf and output buffer \p
2674
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2675
 * necessary at all, on others it won't work at all if not aligned and on others
2676
 * it will work but it will have an impact on performance. In practice, the
2677
 * bitstream should have 4 byte alignment at minimum and all sample data should
2678
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2679
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2680
 * start of the buffer to 16.
2681
 *
2682
 * @param avctx the codec context
2683
 * @param[out] samples the output buffer
2684
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2685
 * @param[in] buf the input buffer
2686
 * @param[in] buf_size the input buffer size in bytes
2687
 * @return On error a negative value is returned, otherwise the number of bytes
2688
 * used or zero if no frame could be decompressed.
2689
 */
2690
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2691
                         int *frame_size_ptr,
2692
                         const uint8_t *buf, int buf_size);
2693

    
2694
/**
2695
 * Decodes a video frame from \p buf into \p picture.
2696
 * The avcodec_decode_video() function decodes a video frame from the input
2697
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2698
 * video codec which was coupled with \p avctx using avcodec_open(). The
2699
 * resulting decoded frame is stored in \p picture.
2700
 *
2701
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2702
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2703
 * bits at once and could read over the end.
2704
 *
2705
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2706
 * no overreading happens for damaged MPEG streams.
2707
 *
2708
 * @note You might have to align the input buffer \p buf and output buffer \p
2709
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2710
 * necessary at all, on others it won't work at all if not aligned and on others
2711
 * it will work but it will have an impact on performance. In practice, the
2712
 * bitstream should have 4 byte alignment at minimum and all sample data should
2713
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2714
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2715
 * start of the buffer to 16.
2716
 *
2717
 * @param avctx the codec context
2718
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2719
 * @param[in] buf the input buffer
2720
 * @param[in] buf_size the size of the input buffer in bytes
2721
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2722
 * @return On error a negative value is returned, otherwise the number of bytes
2723
 * used or zero if no frame could be decompressed.
2724
 */
2725
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2726
                         int *got_picture_ptr,
2727
                         const uint8_t *buf, int buf_size);
2728

    
2729
/* Decode a subtitle message. Return -1 if error, otherwise return the
2730
 * number of bytes used. If no subtitle could be decompressed,
2731
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2732
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2733
                            int *got_sub_ptr,
2734
                            const uint8_t *buf, int buf_size);
2735
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2736
                        int *data_size_ptr,
2737
                        uint8_t *buf, int buf_size);
2738

    
2739
/**
2740
 * Encodes an audio frame from \p samples into \p buf.
2741
 * The avcodec_encode_audio() function encodes an audio frame from the input
2742
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2743
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2744
 * stored in output buffer \p buf.
2745
 *
2746
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2747
 *
2748
 * @param avctx the codec context
2749
 * @param[out] buf the output buffer
2750
 * @param[in] buf_size the output buffer size
2751
 * @param[in] samples the input buffer containing the samples
2752
 * The number of samples read from this buffer is frame_size*channels,
2753
 * both of which are defined in \p avctx.
2754
 * For PCM audio the number of samples read from \p samples is equal to
2755
 * \p buf_size * input_sample_size / output_sample_size.
2756
 * @return On error a negative value is returned, on success zero or the number
2757
 * of bytes used to encode the data read from the input buffer.
2758
 */
2759
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2760
                         const short *samples);
2761

    
2762
/**
2763
 * Encodes a video frame from \p pict into \p buf.
2764
 * The avcodec_encode_video() function encodes a video frame from the input
2765
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2766
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2767
 * frame are stored in the output buffer \p buf. The input picture should be
2768
 * stored using a specific format, namely \c avctx.pix_fmt.
2769
 *
2770
 * @param avctx the codec context
2771
 * @param[out] buf the output buffer for the bitstream of encoded frame
2772
 * @param[in] buf_size the size of the output buffer in bytes
2773
 * @param[in] pict the input picture to encode
2774
 * @return On error a negative value is returned, on success zero or the number
2775
 * of bytes used from the input buffer.
2776
 */
2777
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2778
                         const AVFrame *pict);
2779
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2780
                            const AVSubtitle *sub);
2781

    
2782
int avcodec_close(AVCodecContext *avctx);
2783

    
2784
void avcodec_register_all(void);
2785

    
2786
/**
2787
 * Flush buffers, should be called when seeking or when switching to a different stream.
2788
 */
2789
void avcodec_flush_buffers(AVCodecContext *avctx);
2790

    
2791
void avcodec_default_free_buffers(AVCodecContext *s);
2792

    
2793
/* misc useful functions */
2794

    
2795
/**
2796
 * Returns a single letter to describe the given picture type \p pict_type.
2797
 *
2798
 * @param[in] pict_type the picture type
2799
 * @return A single character representing the picture type.
2800
 */
2801
char av_get_pict_type_char(int pict_type);
2802

    
2803
/**
2804
 * Returns codec bits per sample.
2805
 *
2806
 * @param[in] codec_id the codec
2807
 * @return Number of bits per sample or zero if unknown for the given codec.
2808
 */
2809
int av_get_bits_per_sample(enum CodecID codec_id);
2810

    
2811
/**
2812
 * Returns sample format bits per sample.
2813
 *
2814
 * @param[in] sample_fmt the sample format
2815
 * @return Number of bits per sample or zero if unknown for the given sample format.
2816
 */
2817
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2818

    
2819
/* frame parsing */
2820
typedef struct AVCodecParserContext {
2821
    void *priv_data;
2822
    struct AVCodecParser *parser;
2823
    int64_t frame_offset; /* offset of the current frame */
2824
    int64_t cur_offset; /* current offset
2825
                           (incremented by each av_parser_parse()) */
2826
    int64_t next_frame_offset; /* offset of the next frame */
2827
    /* video info */
2828
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2829
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2830
    int64_t pts;     /* pts of the current frame */
2831
    int64_t dts;     /* dts of the current frame */
2832

    
2833
    /* private data */
2834
    int64_t last_pts;
2835
    int64_t last_dts;
2836
    int fetch_timestamp;
2837

    
2838
#define AV_PARSER_PTS_NB 4
2839
    int cur_frame_start_index;
2840
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2841
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2842
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2843

    
2844
    int flags;
2845
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2846

    
2847
    int64_t offset;      ///< byte offset from starting packet start
2848
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
2849
} AVCodecParserContext;
2850

    
2851
typedef struct AVCodecParser {
2852
    int codec_ids[5]; /* several codec IDs are permitted */
2853
    int priv_data_size;
2854
    int (*parser_init)(AVCodecParserContext *s);
2855
    int (*parser_parse)(AVCodecParserContext *s,
2856
                        AVCodecContext *avctx,
2857
                        const uint8_t **poutbuf, int *poutbuf_size,
2858
                        const uint8_t *buf, int buf_size);
2859
    void (*parser_close)(AVCodecParserContext *s);
2860
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2861
    struct AVCodecParser *next;
2862
} AVCodecParser;
2863

    
2864
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2865
extern AVCodecParser *av_first_parser;
2866
#endif
2867
AVCodecParser *av_parser_next(AVCodecParser *c);
2868

    
2869
void av_register_codec_parser(AVCodecParser *parser);
2870
AVCodecParserContext *av_parser_init(int codec_id);
2871
int av_parser_parse(AVCodecParserContext *s,
2872
                    AVCodecContext *avctx,
2873
                    uint8_t **poutbuf, int *poutbuf_size,
2874
                    const uint8_t *buf, int buf_size,
2875
                    int64_t pts, int64_t dts);
2876
int av_parser_change(AVCodecParserContext *s,
2877
                     AVCodecContext *avctx,
2878
                     uint8_t **poutbuf, int *poutbuf_size,
2879
                     const uint8_t *buf, int buf_size, int keyframe);
2880
void av_parser_close(AVCodecParserContext *s);
2881

    
2882

    
2883
typedef struct AVBitStreamFilterContext {
2884
    void *priv_data;
2885
    struct AVBitStreamFilter *filter;
2886
    AVCodecParserContext *parser;
2887
    struct AVBitStreamFilterContext *next;
2888
} AVBitStreamFilterContext;
2889

    
2890

    
2891
typedef struct AVBitStreamFilter {
2892
    const char *name;
2893
    int priv_data_size;
2894
    int (*filter)(AVBitStreamFilterContext *bsfc,
2895
                  AVCodecContext *avctx, const char *args,
2896
                  uint8_t **poutbuf, int *poutbuf_size,
2897
                  const uint8_t *buf, int buf_size, int keyframe);
2898
    void (*close)(AVBitStreamFilterContext *bsfc);
2899
    struct AVBitStreamFilter *next;
2900
} AVBitStreamFilter;
2901

    
2902
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2903
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2904
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2905
                               AVCodecContext *avctx, const char *args,
2906
                               uint8_t **poutbuf, int *poutbuf_size,
2907
                               const uint8_t *buf, int buf_size, int keyframe);
2908
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2909

    
2910
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2911

    
2912
/* memory */
2913

    
2914
/**
2915
 * Reallocates the given block if it is not large enough, otherwise it
2916
 * does nothing.
2917
 *
2918
 * @see av_realloc
2919
 */
2920
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2921

    
2922
/**
2923
 * Copy image 'src' to 'dst'.
2924
 */
2925
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2926
              int pix_fmt, int width, int height);
2927

    
2928
/**
2929
 * Crop image top and left side.
2930
 */
2931
int av_picture_crop(AVPicture *dst, const AVPicture *src,
2932
             int pix_fmt, int top_band, int left_band);
2933

    
2934
/**
2935
 * Pad image.
2936
 */
2937
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2938
            int padtop, int padbottom, int padleft, int padright, int *color);
2939

    
2940
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2941
/**
2942
 * @deprecated Use the software scaler (swscale) instead.
2943
 */
2944
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
2945
              int pix_fmt, int width, int height);
2946

    
2947
/**
2948
 * @deprecated Use the software scaler (swscale) instead.
2949
 */
2950
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
2951
             int pix_fmt, int top_band, int left_band);
2952

    
2953
/**
2954
 * @deprecated Use the software scaler (swscale) instead.
2955
 */
2956
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2957
            int padtop, int padbottom, int padleft, int padright, int *color);
2958
#endif
2959

    
2960
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2961

    
2962
/**
2963
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
2964
 *
2965
 * @return 0 in case of a successful parsing, a negative value otherwise
2966
 * @param[in] str the string to parse: it has to be a string in the format
2967
 * <width>x<height> or a valid video frame size abbreviation.
2968
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
2969
 * frame width value
2970
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
2971
 * frame height value
2972
 */
2973
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
2974

    
2975
/**
2976
 * Parses \p str and put in \p frame_rate the detected values.
2977
 *
2978
 * @return 0 in case of a successful parsing, a negative value otherwise
2979
 * @param[in] str the string to parse: it has to be a string in the format
2980
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
2981
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
2982
 * frame rate
2983
 */
2984
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
2985

    
2986
/* error handling */
2987
#if EINVAL > 0
2988
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
2989
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
2990
#else
2991
/* Some platforms have E* and errno already negated. */
2992
#define AVERROR(e) (e)
2993
#define AVUNERROR(e) (e)
2994
#endif
2995
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
2996
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
2997
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
2998
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
2999
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3000
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3001
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3002
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3003
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3004

    
3005
#endif /* FFMPEG_AVCODEC_H */