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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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#include <sys/types.h> /* size_t */
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#define LIBAVCODEC_VERSION_TRIPLET 51,50,1
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_TRIPLET)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_TRIPLET)
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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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    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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    /* 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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    /* 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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    /* 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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    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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    /* 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 (generaly 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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};
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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     ((int)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 :
446
 *              Syntax Arithmetic coding (SAC)
447
 *              Reference Picture Selection
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 *              Independent Segment Decoding */
449
/* /Fx */
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/* codec capabilities */
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452
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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/**
454
 * Codec uses get_buffer() for allocating buffers.
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 * direct rendering method 1
456
 */
457
#define CODEC_CAP_DR1             0x0002
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/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
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#define CODEC_CAP_PARSE_ONLY      0x0004
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#define CODEC_CAP_TRUNCATED       0x0008
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/* Codec can export data for HW decoding (XvMC). */
462
#define CODEC_CAP_HWACCEL         0x0010
463
/**
464
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
465
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
466
 */
467
#define CODEC_CAP_DELAY           0x0020
468
/**
469
 * Codec can be fed a final frame with a smaller size.
470
 * This can be used to prevent truncation of the last audio samples.
471
 */
472
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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474
//The following defines may change, don't expect compatibility if you use them.
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#define MB_TYPE_INTRA4x4   0x0001
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#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
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#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
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#define MB_TYPE_16x16      0x0008
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#define MB_TYPE_16x8       0x0010
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#define MB_TYPE_8x16       0x0020
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#define MB_TYPE_8x8        0x0040
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#define MB_TYPE_INTERLACED 0x0080
483
#define MB_TYPE_DIRECT2    0x0100 //FIXME
484
#define MB_TYPE_ACPRED     0x0200
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#define MB_TYPE_GMC        0x0400
486
#define MB_TYPE_SKIP       0x0800
487
#define MB_TYPE_P0L0       0x1000
488
#define MB_TYPE_P1L0       0x2000
489
#define MB_TYPE_P0L1       0x4000
490
#define MB_TYPE_P1L1       0x8000
491
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
492
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
493
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
494
#define MB_TYPE_QUANT      0x00010000
495
#define MB_TYPE_CBP        0x00020000
496
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
497

    
498
/**
499
 * Pan Scan area.
500
 * This specifies the area which should be displayed.
501
 * Note there may be multiple such areas for one frame.
502
 */
503
typedef struct AVPanScan{
504
    /**
505
     * id
506
     * - encoding: Set by user.
507
     * - decoding: Set by libavcodec.
508
     */
509
    int id;
510

    
511
    /**
512
     * width and height in 1/16 pel
513
     * - encoding: Set by user.
514
     * - decoding: Set by libavcodec.
515
     */
516
    int width;
517
    int height;
518

    
519
    /**
520
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
521
     * - encoding: Set by user.
522
     * - decoding: Set by libavcodec.
523
     */
524
    int16_t position[3][2];
525
}AVPanScan;
526

    
527
#define FF_COMMON_FRAME \
528
    /**\
529
     * pointer to the picture planes.\
530
     * This might be different from the first allocated byte\
531
     * - encoding: \
532
     * - decoding: \
533
     */\
534
    uint8_t *data[4];\
535
    int linesize[4];\
536
    /**\
537
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
538
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
539
     * - encoding: \
540
     * - decoding: \
541
     */\
542
    uint8_t *base[4];\
543
    /**\
544
     * 1 -> keyframe, 0-> not\
545
     * - encoding: Set by libavcodec.\
546
     * - decoding: Set by libavcodec.\
547
     */\
548
    int key_frame;\
549
\
550
    /**\
551
     * Picture type of the frame, see ?_TYPE below.\
552
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
553
     * - decoding: Set by libavcodec.\
554
     */\
555
    int pict_type;\
556
\
557
    /**\
558
     * presentation timestamp in time_base units (time when frame should be shown to user)\
559
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
560
     * - encoding: MUST be set by user.\
561
     * - decoding: Set by libavcodec.\
562
     */\
563
    int64_t pts;\
564
\
565
    /**\
566
     * picture number in bitstream order\
567
     * - encoding: set by\
568
     * - decoding: Set by libavcodec.\
569
     */\
570
    int coded_picture_number;\
571
    /**\
572
     * picture number in display order\
573
     * - encoding: set by\
574
     * - decoding: Set by libavcodec.\
575
     */\
576
    int display_picture_number;\
577
\
578
    /**\
579
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
580
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
581
     * - decoding: Set by libavcodec.\
582
     */\
583
    int quality; \
584
\
585
    /**\
586
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
587
     * Set to INT_MAX if the buffer has not been used yet.\
588
     * - encoding: unused\
589
     * - decoding: MUST be set by get_buffer().\
590
     */\
591
    int age;\
592
\
593
    /**\
594
     * is this picture used as reference\
595
     * - encoding: unused\
596
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
597
     */\
598
    int reference;\
599
\
600
    /**\
601
     * QP table\
602
     * - encoding: unused\
603
     * - decoding: Set by libavcodec.\
604
     */\
605
    int8_t *qscale_table;\
606
    /**\
607
     * QP store stride\
608
     * - encoding: unused\
609
     * - decoding: Set by libavcodec.\
610
     */\
611
    int qstride;\
612
\
613
    /**\
614
     * mbskip_table[mb]>=1 if MB didn't change\
615
     * stride= mb_width = (width+15)>>4\
616
     * - encoding: unused\
617
     * - decoding: Set by libavcodec.\
618
     */\
619
    uint8_t *mbskip_table;\
620
\
621
    /**\
622
     * motion vector table\
623
     * @code\
624
     * example:\
625
     * int mv_sample_log2= 4 - motion_subsample_log2;\
626
     * int mb_width= (width+15)>>4;\
627
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
628
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
629
     * @endcode\
630
     * - encoding: Set by user.\
631
     * - decoding: Set by libavcodec.\
632
     */\
633
    int16_t (*motion_val[2])[2];\
634
\
635
    /**\
636
     * macroblock type table\
637
     * mb_type_base + mb_width + 2\
638
     * - encoding: Set by user.\
639
     * - decoding: Set by libavcodec.\
640
     */\
641
    uint32_t *mb_type;\
642
\
643
    /**\
644
     * log2 of the size of the block which a single vector in motion_val represents: \
645
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
646
     * - encoding: unused\
647
     * - decoding: Set by libavcodec.\
648
     */\
649
    uint8_t motion_subsample_log2;\
650
\
651
    /**\
652
     * for some private data of the user\
653
     * - encoding: unused\
654
     * - decoding: Set by user.\
655
     */\
656
    void *opaque;\
657
\
658
    /**\
659
     * error\
660
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
661
     * - decoding: unused\
662
     */\
663
    uint64_t error[4];\
664
\
665
    /**\
666
     * type of the buffer (to keep track of who has to deallocate data[*])\
667
     * - encoding: Set by the one who allocates it.\
668
     * - decoding: Set by the one who allocates it.\
669
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
670
     */\
671
    int type;\
672
    \
673
    /**\
674
     * When decoding, this signals how much the picture must be delayed.\
675
     * extra_delay = repeat_pict / (2*fps)\
676
     * - encoding: unused\
677
     * - decoding: Set by libavcodec.\
678
     */\
679
    int repeat_pict;\
680
    \
681
    /**\
682
     * \
683
     */\
684
    int qscale_type;\
685
    \
686
    /**\
687
     * The content of the picture is interlaced.\
688
     * - encoding: Set by user.\
689
     * - decoding: Set by libavcodec. (default 0)\
690
     */\
691
    int interlaced_frame;\
692
    \
693
    /**\
694
     * If the content is interlaced, is top field displayed first.\
695
     * - encoding: Set by user.\
696
     * - decoding: Set by libavcodec.\
697
     */\
698
    int top_field_first;\
699
    \
700
    /**\
701
     * Pan scan.\
702
     * - encoding: Set by user.\
703
     * - decoding: Set by libavcodec.\
704
     */\
705
    AVPanScan *pan_scan;\
706
    \
707
    /**\
708
     * Tell user application that palette has changed from previous frame.\
709
     * - encoding: ??? (no palette-enabled encoder yet)\
710
     * - decoding: Set by libavcodec. (default 0).\
711
     */\
712
    int palette_has_changed;\
713
    \
714
    /**\
715
     * codec suggestion on buffer type if != 0\
716
     * - encoding: unused\
717
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
718
     */\
719
    int buffer_hints;\
720
\
721
    /**\
722
     * DCT coefficients\
723
     * - encoding: unused\
724
     * - decoding: Set by libavcodec.\
725
     */\
726
    short *dct_coeff;\
727
\
728
    /**\
729
     * motion referece frame index\
730
     * - encoding: Set by user.\
731
     * - decoding: Set by libavcodec.\
732
     */\
733
    int8_t *ref_index[2];
734

    
735
#define FF_QSCALE_TYPE_MPEG1 0
736
#define FF_QSCALE_TYPE_MPEG2 1
737
#define FF_QSCALE_TYPE_H264  2
738

    
739
#define FF_BUFFER_TYPE_INTERNAL 1
740
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
741
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
742
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
743

    
744

    
745
#define FF_I_TYPE  1 // Intra
746
#define FF_P_TYPE  2 // Predicted
747
#define FF_B_TYPE  3 // Bi-dir predicted
748
#define FF_S_TYPE  4 // S(GMC)-VOP MPEG4
749
#define FF_SI_TYPE 5
750
#define FF_SP_TYPE 6
751

    
752
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
753
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
754
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
755
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
756

    
757
/**
758
 * Audio Video Frame.
759
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
760
 * bumps.
761
 * Removal, reordering and changes to existing fields require a major
762
 * version bump. No fields should be added into AVFrame before or after
763
 * FF_COMMON_FRAME!
764
 * sizeof(AVFrame) must not be used outside libav*.
765
 */
766
typedef struct AVFrame {
767
    FF_COMMON_FRAME
768
} AVFrame;
769

    
770
#define DEFAULT_FRAME_RATE_BASE 1001000
771

    
772
/**
773
 * main external API structure.
774
 * New fields can be added to the end with minor version bumps.
775
 * Removal, reordering and changes to existing fields require a major
776
 * version bump.
777
 * sizeof(AVCodecContext) must not be used outside libav*.
778
 */
779
typedef struct AVCodecContext {
780
    /**
781
     * information on struct for av_log
782
     * - set by avcodec_alloc_context
783
     */
784
    AVClass *av_class;
785
    /**
786
     * the average bitrate
787
     * - encoding: Set by user; unused for constant quantizer encoding.
788
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
789
     */
790
    int bit_rate;
791

    
792
    /**
793
     * number of bits the bitstream is allowed to diverge from the reference.
794
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
795
     * - encoding: Set by user; unused for constant quantizer encoding.
796
     * - decoding: unused
797
     */
798
    int bit_rate_tolerance;
799

    
800
    /**
801
     * CODEC_FLAG_*.
802
     * - encoding: Set by user.
803
     * - decoding: Set by user.
804
     */
805
    int flags;
806

    
807
    /**
808
     * Some codecs need additional format info. It is stored here.
809
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
810
     * specific codec MUST set it correctly otherwise stream copy breaks.
811
     * In general use of this field by muxers is not recommanded.
812
     * - encoding: Set by libavcodec.
813
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
814
     */
815
    int sub_id;
816

    
817
    /**
818
     * Motion estimation algorithm used for video coding.
819
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
820
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
821
     * - encoding: MUST be set by user.
822
     * - decoding: unused
823
     */
824
    int me_method;
825

    
826
    /**
827
     * some codecs need / can use extradata like Huffman tables.
828
     * mjpeg: Huffman tables
829
     * rv10: additional flags
830
     * mpeg4: global headers (they can be in the bitstream or here)
831
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
832
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
833
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
834
     * - encoding: Set/allocated/freed by libavcodec.
835
     * - decoding: Set/allocated/freed by user.
836
     */
837
    uint8_t *extradata;
838
    int extradata_size;
839

    
840
    /**
841
     * This is the fundamental unit of time (in seconds) in terms
842
     * of which frame timestamps are represented. For fixed-fps content,
843
     * timebase should be 1/framerate and timestamp increments should be
844
     * identically 1.
845
     * - encoding: MUST be set by user.
846
     * - decoding: Set by libavcodec.
847
     */
848
    AVRational time_base;
849

    
850
    /* video only */
851
    /**
852
     * picture width / height.
853
     * - encoding: MUST be set by user.
854
     * - decoding: Set by libavcodec.
855
     * Note: For compatibility it is possible to set this instead of
856
     * coded_width/height before decoding.
857
     */
858
    int width, height;
859

    
860
#define FF_ASPECT_EXTENDED 15
861

    
862
    /**
863
     * the number of pictures in a group of pictures, or 0 for intra_only
864
     * - encoding: Set by user.
865
     * - decoding: unused
866
     */
867
    int gop_size;
868

    
869
    /**
870
     * Pixel format, see PIX_FMT_xxx.
871
     * - encoding: Set by user.
872
     * - decoding: Set by libavcodec.
873
     */
874
    enum PixelFormat pix_fmt;
875

    
876
    /**
877
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
878
     * has to read frames at native frame rate.
879
     * - encoding: Set by user.
880
     * - decoding: unused
881
     */
882
    int rate_emu;
883

    
884
    /**
885
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
886
     * decoder to draw a horizontal band. It improves cache usage. Not
887
     * all codecs can do that. You must check the codec capabilities
888
     * beforehand.
889
     * - encoding: unused
890
     * - decoding: Set by user.
891
     * @param height the height of the slice
892
     * @param y the y position of the slice
893
     * @param type 1->top field, 2->bottom field, 3->frame
894
     * @param offset offset into the AVFrame.data from which the slice should be read
895
     */
896
    void (*draw_horiz_band)(struct AVCodecContext *s,
897
                            const AVFrame *src, int offset[4],
898
                            int y, int type, int height);
899

    
900
    /* audio only */
901
    int sample_rate; ///< samples per second
902
    int channels;
903

    
904
    /**
905
     * audio sample format
906
     * - encoding: Set by user.
907
     * - decoding: Set by libavcodec.
908
     */
909
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
910

    
911
    /* The following data should not be initialized. */
912
    /**
913
     * Samples per packet, initialized when calling 'init'.
914
     */
915
    int frame_size;
916
    int frame_number;   ///< audio or video frame number
917
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
918

    
919
    /**
920
     * Number of frames the decoded output will be delayed relative to
921
     * the encoded input.
922
     * - encoding: Set by libavcodec.
923
     * - decoding: unused
924
     */
925
    int delay;
926

    
927
    /* - encoding parameters */
928
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
929
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
930

    
931
    /**
932
     * minimum quantizer
933
     * - encoding: Set by user.
934
     * - decoding: unused
935
     */
936
    int qmin;
937

    
938
    /**
939
     * maximum quantizer
940
     * - encoding: Set by user.
941
     * - decoding: unused
942
     */
943
    int qmax;
944

    
945
    /**
946
     * maximum quantizer difference between frames
947
     * - encoding: Set by user.
948
     * - decoding: unused
949
     */
950
    int max_qdiff;
951

    
952
    /**
953
     * maximum number of B-frames between non-B-frames
954
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
955
     * - encoding: Set by user.
956
     * - decoding: unused
957
     */
958
    int max_b_frames;
959

    
960
    /**
961
     * qscale factor between IP and B-frames
962
     * - encoding: Set by user.
963
     * - decoding: unused
964
     */
965
    float b_quant_factor;
966

    
967
    /** obsolete FIXME remove */
968
    int rc_strategy;
969
#define FF_RC_STRATEGY_XVID 1
970

    
971
    int b_frame_strategy;
972

    
973
    /**
974
     * hurry up amount
975
     * - encoding: unused
976
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
977
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
978
     */
979
    int hurry_up;
980

    
981
    struct AVCodec *codec;
982

    
983
    void *priv_data;
984

    
985
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
986
    /* unused, FIXME remove*/
987
    int rtp_mode;
988
#endif
989

    
990
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
991
                            /* do its best to deliver a chunk with size     */
992
                            /* below rtp_payload_size, the chunk will start */
993
                            /* with a start code on some codecs like H.263. */
994
                            /* This doesn't take account of any particular  */
995
                            /* headers inside the transmitted RTP payload.  */
996

    
997

    
998
    /* The RTP callback: This function is called    */
999
    /* every time the encoder has a packet to send. */
1000
    /* It depends on the encoder if the data starts */
1001
    /* with a Start Code (it should). H.263 does.   */
1002
    /* mb_nb contains the number of macroblocks     */
1003
    /* encoded in the RTP payload.                  */
1004
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1005

    
1006
    /* statistics, used for 2-pass encoding */
1007
    int mv_bits;
1008
    int header_bits;
1009
    int i_tex_bits;
1010
    int p_tex_bits;
1011
    int i_count;
1012
    int p_count;
1013
    int skip_count;
1014
    int misc_bits;
1015

    
1016
    /**
1017
     * number of bits used for the previously encoded frame
1018
     * - encoding: Set by libavcodec.
1019
     * - decoding: unused
1020
     */
1021
    int frame_bits;
1022

    
1023
    /**
1024
     * Private data of the user, can be used to carry app specific stuff.
1025
     * - encoding: Set by user.
1026
     * - decoding: Set by user.
1027
     */
1028
    void *opaque;
1029

    
1030
    char codec_name[32];
1031
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1032
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1033

    
1034
    /**
1035
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1036
     * This is used to work around some encoder bugs.
1037
     * A demuxer should set this to what is stored in the field used to identify the codec.
1038
     * If there are multiple such fields in a container then the demuxer should choose the one
1039
     * which maximizes the information about the used codec.
1040
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1041
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1042
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1043
     * first.
1044
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1045
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1046
     */
1047
    unsigned int codec_tag;
1048

    
1049
    /**
1050
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1051
     * - encoding: Set by user
1052
     * - decoding: Set by user
1053
     */
1054
    int workaround_bugs;
1055
#define FF_BUG_AUTODETECT       1  ///< autodetection
1056
#define FF_BUG_OLD_MSMPEG4      2
1057
#define FF_BUG_XVID_ILACE       4
1058
#define FF_BUG_UMP4             8
1059
#define FF_BUG_NO_PADDING       16
1060
#define FF_BUG_AMV              32
1061
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1062
#define FF_BUG_QPEL_CHROMA      64
1063
#define FF_BUG_STD_QPEL         128
1064
#define FF_BUG_QPEL_CHROMA2     256
1065
#define FF_BUG_DIRECT_BLOCKSIZE 512
1066
#define FF_BUG_EDGE             1024
1067
#define FF_BUG_HPEL_CHROMA      2048
1068
#define FF_BUG_DC_CLIP          4096
1069
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1070
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1071

    
1072
    /**
1073
     * luma single coefficient elimination threshold
1074
     * - encoding: Set by user.
1075
     * - decoding: unused
1076
     */
1077
    int luma_elim_threshold;
1078

    
1079
    /**
1080
     * chroma single coeff elimination threshold
1081
     * - encoding: Set by user.
1082
     * - decoding: unused
1083
     */
1084
    int chroma_elim_threshold;
1085

    
1086
    /**
1087
     * strictly follow the standard (MPEG4, ...).
1088
     * - encoding: Set by user.
1089
     * - decoding: unused
1090
     */
1091
    int strict_std_compliance;
1092
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1093
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1094
#define FF_COMPLIANCE_NORMAL        0
1095
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1096
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1097

    
1098
    /**
1099
     * qscale offset between IP and B-frames
1100
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1101
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1102
     * - encoding: Set by user.
1103
     * - decoding: unused
1104
     */
1105
    float b_quant_offset;
1106

    
1107
    /**
1108
     * Error resilience; higher values will detect more errors but may
1109
     * misdetect some more or less valid parts as errors.
1110
     * - encoding: unused
1111
     * - decoding: Set by user.
1112
     */
1113
    int error_resilience;
1114
#define FF_ER_CAREFUL         1
1115
#define FF_ER_COMPLIANT       2
1116
#define FF_ER_AGGRESSIVE      3
1117
#define FF_ER_VERY_AGGRESSIVE 4
1118

    
1119
    /**
1120
     * Called at the beginning of each frame to get a buffer for it.
1121
     * If pic.reference is set then the frame will be read later by libavcodec.
1122
     * avcodec_align_dimensions() should be used to find the required width and
1123
     * height, as they normally need to be rounded up to the next multiple of 16.
1124
     * - encoding: unused
1125
     * - decoding: Set by libavcodec., user can override.
1126
     */
1127
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1128

    
1129
    /**
1130
     * Called to release buffers which where allocated with get_buffer.
1131
     * A released buffer can be reused in get_buffer().
1132
     * pic.data[*] must be set to NULL.
1133
     * - encoding: unused
1134
     * - decoding: Set by libavcodec., user can override.
1135
     */
1136
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1137

    
1138
    /**
1139
     * If 1 the stream has a 1 frame delay during decoding.
1140
     * - encoding: Set by libavcodec.
1141
     * - decoding: Set by libavcodec.
1142
     */
1143
    int has_b_frames;
1144

    
1145
    /**
1146
     * number of bytes per packet if constant and known or 0
1147
     * Used by some WAV based audio codecs.
1148
     */
1149
    int block_align;
1150

    
1151
    int parse_only; /* - decoding only: If true, only parsing is done
1152
                       (function avcodec_parse_frame()). The frame
1153
                       data is returned. Only MPEG codecs support this now. */
1154

    
1155
    /**
1156
     * 0-> h263 quant 1-> mpeg quant
1157
     * - encoding: Set by user.
1158
     * - decoding: unused
1159
     */
1160
    int mpeg_quant;
1161

    
1162
    /**
1163
     * pass1 encoding statistics output buffer
1164
     * - encoding: Set by libavcodec.
1165
     * - decoding: unused
1166
     */
1167
    char *stats_out;
1168

    
1169
    /**
1170
     * pass2 encoding statistics input buffer
1171
     * Concatenated stuff from stats_out of pass1 should be placed here.
1172
     * - encoding: Allocated/set/freed by user.
1173
     * - decoding: unused
1174
     */
1175
    char *stats_in;
1176

    
1177
    /**
1178
     * ratecontrol qmin qmax limiting method
1179
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1180
     * - encoding: Set by user.
1181
     * - decoding: unused
1182
     */
1183
    float rc_qsquish;
1184

    
1185
    float rc_qmod_amp;
1186
    int rc_qmod_freq;
1187

    
1188
    /**
1189
     * ratecontrol override, see RcOverride
1190
     * - encoding: Allocated/set/freed by user.
1191
     * - decoding: unused
1192
     */
1193
    RcOverride *rc_override;
1194
    int rc_override_count;
1195

    
1196
    /**
1197
     * rate control equation
1198
     * - encoding: Set by user
1199
     * - decoding: unused
1200
     */
1201
    const char *rc_eq;
1202

    
1203
    /**
1204
     * maximum bitrate
1205
     * - encoding: Set by user.
1206
     * - decoding: unused
1207
     */
1208
    int rc_max_rate;
1209

    
1210
    /**
1211
     * minimum bitrate
1212
     * - encoding: Set by user.
1213
     * - decoding: unused
1214
     */
1215
    int rc_min_rate;
1216

    
1217
    /**
1218
     * decoder bitstream buffer size
1219
     * - encoding: Set by user.
1220
     * - decoding: unused
1221
     */
1222
    int rc_buffer_size;
1223
    float rc_buffer_aggressivity;
1224

    
1225
    /**
1226
     * qscale factor between P and I-frames
1227
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1228
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1229
     * - encoding: Set by user.
1230
     * - decoding: unused
1231
     */
1232
    float i_quant_factor;
1233

    
1234
    /**
1235
     * qscale offset between P and I-frames
1236
     * - encoding: Set by user.
1237
     * - decoding: unused
1238
     */
1239
    float i_quant_offset;
1240

    
1241
    /**
1242
     * initial complexity for pass1 ratecontrol
1243
     * - encoding: Set by user.
1244
     * - decoding: unused
1245
     */
1246
    float rc_initial_cplx;
1247

    
1248
    /**
1249
     * DCT algorithm, see FF_DCT_* below
1250
     * - encoding: Set by user.
1251
     * - decoding: unused
1252
     */
1253
    int dct_algo;
1254
#define FF_DCT_AUTO    0
1255
#define FF_DCT_FASTINT 1
1256
#define FF_DCT_INT     2
1257
#define FF_DCT_MMX     3
1258
#define FF_DCT_MLIB    4
1259
#define FF_DCT_ALTIVEC 5
1260
#define FF_DCT_FAAN    6
1261

    
1262
    /**
1263
     * luminance masking (0-> disabled)
1264
     * - encoding: Set by user.
1265
     * - decoding: unused
1266
     */
1267
    float lumi_masking;
1268

    
1269
    /**
1270
     * temporary complexity masking (0-> disabled)
1271
     * - encoding: Set by user.
1272
     * - decoding: unused
1273
     */
1274
    float temporal_cplx_masking;
1275

    
1276
    /**
1277
     * spatial complexity masking (0-> disabled)
1278
     * - encoding: Set by user.
1279
     * - decoding: unused
1280
     */
1281
    float spatial_cplx_masking;
1282

    
1283
    /**
1284
     * p block masking (0-> disabled)
1285
     * - encoding: Set by user.
1286
     * - decoding: unused
1287
     */
1288
    float p_masking;
1289

    
1290
    /**
1291
     * darkness masking (0-> disabled)
1292
     * - encoding: Set by user.
1293
     * - decoding: unused
1294
     */
1295
    float dark_masking;
1296

    
1297

    
1298
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1299
    /* for binary compatibility */
1300
    int unused;
1301
#endif
1302

    
1303
    /**
1304
     * IDCT algorithm, see FF_IDCT_* below.
1305
     * - encoding: Set by user.
1306
     * - decoding: Set by user.
1307
     */
1308
    int idct_algo;
1309
#define FF_IDCT_AUTO          0
1310
#define FF_IDCT_INT           1
1311
#define FF_IDCT_SIMPLE        2
1312
#define FF_IDCT_SIMPLEMMX     3
1313
#define FF_IDCT_LIBMPEG2MMX   4
1314
#define FF_IDCT_PS2           5
1315
#define FF_IDCT_MLIB          6
1316
#define FF_IDCT_ARM           7
1317
#define FF_IDCT_ALTIVEC       8
1318
#define FF_IDCT_SH4           9
1319
#define FF_IDCT_SIMPLEARM     10
1320
#define FF_IDCT_H264          11
1321
#define FF_IDCT_VP3           12
1322
#define FF_IDCT_IPP           13
1323
#define FF_IDCT_XVIDMMX       14
1324
#define FF_IDCT_CAVS          15
1325
#define FF_IDCT_SIMPLEARMV5TE 16
1326
#define FF_IDCT_SIMPLEARMV6   17
1327
#define FF_IDCT_SIMPLEVIS     18
1328
#define FF_IDCT_WMV2          19
1329
#define FF_IDCT_FAAN          20
1330

    
1331
    /**
1332
     * slice count
1333
     * - encoding: Set by libavcodec.
1334
     * - decoding: Set by user (or 0).
1335
     */
1336
    int slice_count;
1337
    /**
1338
     * slice offsets in the frame in bytes
1339
     * - encoding: Set/allocated by libavcodec.
1340
     * - decoding: Set/allocated by user (or NULL).
1341
     */
1342
    int *slice_offset;
1343

    
1344
    /**
1345
     * error concealment flags
1346
     * - encoding: unused
1347
     * - decoding: Set by user.
1348
     */
1349
    int error_concealment;
1350
#define FF_EC_GUESS_MVS   1
1351
#define FF_EC_DEBLOCK     2
1352

    
1353
    /**
1354
     * dsp_mask could be add used to disable unwanted CPU features
1355
     * CPU features (i.e. MMX, SSE. ...)
1356
     *
1357
     * With the FORCE flag you may instead enable given CPU features.
1358
     * (Dangerous: Usable in case of misdetection, improper usage however will
1359
     * result into program crash.)
1360
     */
1361
    unsigned dsp_mask;
1362
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1363
    /* lower 16 bits - CPU features */
1364
#define FF_MM_MMX      0x0001 ///< standard MMX
1365
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1366
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1367
#define FF_MM_SSE      0x0008 ///< SSE functions
1368
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1369
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1370
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1371
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1372
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1373

    
1374
    /**
1375
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1376
     * - encoding: Set by libavcodec.
1377
     * - decoding: Set by user.
1378
     */
1379
     int bits_per_sample;
1380

    
1381
    /**
1382
     * prediction method (needed for huffyuv)
1383
     * - encoding: Set by user.
1384
     * - decoding: unused
1385
     */
1386
     int prediction_method;
1387
#define FF_PRED_LEFT   0
1388
#define FF_PRED_PLANE  1
1389
#define FF_PRED_MEDIAN 2
1390

    
1391
    /**
1392
     * sample aspect ratio (0 if unknown)
1393
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1394
     * - encoding: Set by user.
1395
     * - decoding: Set by libavcodec.
1396
     */
1397
    AVRational sample_aspect_ratio;
1398

    
1399
    /**
1400
     * the picture in the bitstream
1401
     * - encoding: Set by libavcodec.
1402
     * - decoding: Set by libavcodec.
1403
     */
1404
    AVFrame *coded_frame;
1405

    
1406
    /**
1407
     * debug
1408
     * - encoding: Set by user.
1409
     * - decoding: Set by user.
1410
     */
1411
    int debug;
1412
#define FF_DEBUG_PICT_INFO   1
1413
#define FF_DEBUG_RC          2
1414
#define FF_DEBUG_BITSTREAM   4
1415
#define FF_DEBUG_MB_TYPE     8
1416
#define FF_DEBUG_QP          16
1417
#define FF_DEBUG_MV          32
1418
#define FF_DEBUG_DCT_COEFF   0x00000040
1419
#define FF_DEBUG_SKIP        0x00000080
1420
#define FF_DEBUG_STARTCODE   0x00000100
1421
#define FF_DEBUG_PTS         0x00000200
1422
#define FF_DEBUG_ER          0x00000400
1423
#define FF_DEBUG_MMCO        0x00000800
1424
#define FF_DEBUG_BUGS        0x00001000
1425
#define FF_DEBUG_VIS_QP      0x00002000
1426
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1427

    
1428
    /**
1429
     * debug
1430
     * - encoding: Set by user.
1431
     * - decoding: Set by user.
1432
     */
1433
    int debug_mv;
1434
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1435
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1436
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1437

    
1438
    /**
1439
     * error
1440
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1441
     * - decoding: unused
1442
     */
1443
    uint64_t error[4];
1444

    
1445
    /**
1446
     * minimum MB quantizer
1447
     * - encoding: unused
1448
     * - decoding: unused
1449
     */
1450
    int mb_qmin;
1451

    
1452
    /**
1453
     * maximum MB quantizer
1454
     * - encoding: unused
1455
     * - decoding: unused
1456
     */
1457
    int mb_qmax;
1458

    
1459
    /**
1460
     * motion estimation comparison function
1461
     * - encoding: Set by user.
1462
     * - decoding: unused
1463
     */
1464
    int me_cmp;
1465
    /**
1466
     * subpixel motion estimation comparison function
1467
     * - encoding: Set by user.
1468
     * - decoding: unused
1469
     */
1470
    int me_sub_cmp;
1471
    /**
1472
     * macroblock comparison function (not supported yet)
1473
     * - encoding: Set by user.
1474
     * - decoding: unused
1475
     */
1476
    int mb_cmp;
1477
    /**
1478
     * interlaced DCT comparison function
1479
     * - encoding: Set by user.
1480
     * - decoding: unused
1481
     */
1482
    int ildct_cmp;
1483
#define FF_CMP_SAD    0
1484
#define FF_CMP_SSE    1
1485
#define FF_CMP_SATD   2
1486
#define FF_CMP_DCT    3
1487
#define FF_CMP_PSNR   4
1488
#define FF_CMP_BIT    5
1489
#define FF_CMP_RD     6
1490
#define FF_CMP_ZERO   7
1491
#define FF_CMP_VSAD   8
1492
#define FF_CMP_VSSE   9
1493
#define FF_CMP_NSSE   10
1494
#define FF_CMP_W53    11
1495
#define FF_CMP_W97    12
1496
#define FF_CMP_DCTMAX 13
1497
#define FF_CMP_DCT264 14
1498
#define FF_CMP_CHROMA 256
1499

    
1500
    /**
1501
     * ME diamond size & shape
1502
     * - encoding: Set by user.
1503
     * - decoding: unused
1504
     */
1505
    int dia_size;
1506

    
1507
    /**
1508
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1509
     * - encoding: Set by user.
1510
     * - decoding: unused
1511
     */
1512
    int last_predictor_count;
1513

    
1514
    /**
1515
     * prepass for motion estimation
1516
     * - encoding: Set by user.
1517
     * - decoding: unused
1518
     */
1519
    int pre_me;
1520

    
1521
    /**
1522
     * motion estimation prepass comparison function
1523
     * - encoding: Set by user.
1524
     * - decoding: unused
1525
     */
1526
    int me_pre_cmp;
1527

    
1528
    /**
1529
     * ME prepass diamond size & shape
1530
     * - encoding: Set by user.
1531
     * - decoding: unused
1532
     */
1533
    int pre_dia_size;
1534

    
1535
    /**
1536
     * subpel ME quality
1537
     * - encoding: Set by user.
1538
     * - decoding: unused
1539
     */
1540
    int me_subpel_quality;
1541

    
1542
    /**
1543
     * callback to negotiate the pixelFormat
1544
     * @param fmt is the list of formats which are supported by the codec,
1545
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1546
     * The first is always the native one.
1547
     * @return the chosen format
1548
     * - encoding: unused
1549
     * - decoding: Set by user, if not set the native format will be chosen.
1550
     */
1551
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1552

    
1553
    /**
1554
     * DTG active format information (additional aspect ratio
1555
     * information only used in DVB MPEG-2 transport streams)
1556
     * 0 if not set.
1557
     *
1558
     * - encoding: unused
1559
     * - decoding: Set by decoder.
1560
     */
1561
    int dtg_active_format;
1562
#define FF_DTG_AFD_SAME         8
1563
#define FF_DTG_AFD_4_3          9
1564
#define FF_DTG_AFD_16_9         10
1565
#define FF_DTG_AFD_14_9         11
1566
#define FF_DTG_AFD_4_3_SP_14_9  13
1567
#define FF_DTG_AFD_16_9_SP_14_9 14
1568
#define FF_DTG_AFD_SP_4_3       15
1569

    
1570
    /**
1571
     * maximum motion estimation search range in subpel units
1572
     * If 0 then no limit.
1573
     *
1574
     * - encoding: Set by user.
1575
     * - decoding: unused
1576
     */
1577
    int me_range;
1578

    
1579
    /**
1580
     * intra quantizer bias
1581
     * - encoding: Set by user.
1582
     * - decoding: unused
1583
     */
1584
    int intra_quant_bias;
1585
#define FF_DEFAULT_QUANT_BIAS 999999
1586

    
1587
    /**
1588
     * inter quantizer bias
1589
     * - encoding: Set by user.
1590
     * - decoding: unused
1591
     */
1592
    int inter_quant_bias;
1593

    
1594
    /**
1595
     * color table ID
1596
     * - encoding: unused
1597
     * - decoding: Which clrtable should be used for 8bit RGB images.
1598
     *             Tables have to be stored somewhere. FIXME
1599
     */
1600
    int color_table_id;
1601

    
1602
    /**
1603
     * internal_buffer count
1604
     * Don't touch, used by libavcodec default_get_buffer().
1605
     */
1606
    int internal_buffer_count;
1607

    
1608
    /**
1609
     * internal_buffers
1610
     * Don't touch, used by libavcodec default_get_buffer().
1611
     */
1612
    void *internal_buffer;
1613

    
1614
#define FF_LAMBDA_SHIFT 7
1615
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1616
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1617
#define FF_LAMBDA_MAX (256*128-1)
1618

    
1619
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1620
    /**
1621
     * Global quality for codecs which cannot change it per frame.
1622
     * This should be proportional to MPEG-1/2/4 qscale.
1623
     * - encoding: Set by user.
1624
     * - decoding: unused
1625
     */
1626
    int global_quality;
1627

    
1628
#define FF_CODER_TYPE_VLC       0
1629
#define FF_CODER_TYPE_AC        1
1630
#define FF_CODER_TYPE_RAW       2
1631
#define FF_CODER_TYPE_RLE       3
1632
#define FF_CODER_TYPE_DEFLATE   4
1633
    /**
1634
     * coder type
1635
     * - encoding: Set by user.
1636
     * - decoding: unused
1637
     */
1638
    int coder_type;
1639

    
1640
    /**
1641
     * context model
1642
     * - encoding: Set by user.
1643
     * - decoding: unused
1644
     */
1645
    int context_model;
1646
#if 0
1647
    /**
1648
     *
1649
     * - encoding: unused
1650
     * - decoding: Set by user.
1651
     */
1652
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1653
#endif
1654

    
1655
    /**
1656
     * slice flags
1657
     * - encoding: unused
1658
     * - decoding: Set by user.
1659
     */
1660
    int slice_flags;
1661
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1662
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1663
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1664

    
1665
    /**
1666
     * XVideo Motion Acceleration
1667
     * - encoding: forbidden
1668
     * - decoding: set by decoder
1669
     */
1670
    int xvmc_acceleration;
1671

    
1672
    /**
1673
     * macroblock decision mode
1674
     * - encoding: Set by user.
1675
     * - decoding: unused
1676
     */
1677
    int mb_decision;
1678
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1679
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1680
#define FF_MB_DECISION_RD     2        ///< rate distoration
1681

    
1682
    /**
1683
     * custom intra quantization matrix
1684
     * - encoding: Set by user, can be NULL.
1685
     * - decoding: Set by libavcodec.
1686
     */
1687
    uint16_t *intra_matrix;
1688

    
1689
    /**
1690
     * custom inter quantization matrix
1691
     * - encoding: Set by user, can be NULL.
1692
     * - decoding: Set by libavcodec.
1693
     */
1694
    uint16_t *inter_matrix;
1695

    
1696
    /**
1697
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1698
     * This is used to work around some encoder bugs.
1699
     * - encoding: unused
1700
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1701
     */
1702
    unsigned int stream_codec_tag;
1703

    
1704
    /**
1705
     * scene change detection threshold
1706
     * 0 is default, larger means fewer detected scene changes.
1707
     * - encoding: Set by user.
1708
     * - decoding: unused
1709
     */
1710
    int scenechange_threshold;
1711

    
1712
    /**
1713
     * minimum Lagrange multipler
1714
     * - encoding: Set by user.
1715
     * - decoding: unused
1716
     */
1717
    int lmin;
1718

    
1719
    /**
1720
     * maximum Lagrange multipler
1721
     * - encoding: Set by user.
1722
     * - decoding: unused
1723
     */
1724
    int lmax;
1725

    
1726
    /**
1727
     * palette control structure
1728
     * - encoding: ??? (no palette-enabled encoder yet)
1729
     * - decoding: Set by user.
1730
     */
1731
    struct AVPaletteControl *palctrl;
1732

    
1733
    /**
1734
     * noise reduction strength
1735
     * - encoding: Set by user.
1736
     * - decoding: unused
1737
     */
1738
    int noise_reduction;
1739

    
1740
    /**
1741
     * Called at the beginning of a frame to get cr buffer for it.
1742
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1743
     * libavcodec will pass previous buffer in pic, function should return
1744
     * same buffer or new buffer with old frame "painted" into it.
1745
     * If pic.data[0] == NULL must behave like get_buffer().
1746
     * - encoding: unused
1747
     * - decoding: Set by libavcodec., user can override
1748
     */
1749
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1750

    
1751
    /**
1752
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1753
     * - encoding: Set by user.
1754
     * - decoding: unused
1755
     */
1756
    int rc_initial_buffer_occupancy;
1757

    
1758
    /**
1759
     *
1760
     * - encoding: Set by user.
1761
     * - decoding: unused
1762
     */
1763
    int inter_threshold;
1764

    
1765
    /**
1766
     * CODEC_FLAG2_*
1767
     * - encoding: Set by user.
1768
     * - decoding: Set by user.
1769
     */
1770
    int flags2;
1771

    
1772
    /**
1773
     * Simulates errors in the bitstream to test error concealment.
1774
     * - encoding: Set by user.
1775
     * - decoding: unused
1776
     */
1777
    int error_rate;
1778

    
1779
    /**
1780
     * MP3 antialias algorithm, see FF_AA_* below.
1781
     * - encoding: unused
1782
     * - decoding: Set by user.
1783
     */
1784
    int antialias_algo;
1785
#define FF_AA_AUTO    0
1786
#define FF_AA_FASTINT 1 //not implemented yet
1787
#define FF_AA_INT     2
1788
#define FF_AA_FLOAT   3
1789
    /**
1790
     * quantizer noise shaping
1791
     * - encoding: Set by user.
1792
     * - decoding: unused
1793
     */
1794
    int quantizer_noise_shaping;
1795

    
1796
    /**
1797
     * thread count
1798
     * is used to decide how many independent tasks should be passed to execute()
1799
     * - encoding: Set by user.
1800
     * - decoding: Set by user.
1801
     */
1802
    int thread_count;
1803

    
1804
    /**
1805
     * The codec may call this to execute several independent things.
1806
     * It will return only after finishing all tasks.
1807
     * The user may replace this with some multithreaded implementation,
1808
     * the default implementation will execute the parts serially.
1809
     * @param count the number of things to execute
1810
     * - encoding: Set by libavcodec, user can override.
1811
     * - decoding: Set by libavcodec, user can override.
1812
     */
1813
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1814

    
1815
    /**
1816
     * thread opaque
1817
     * Can be used by execute() to store some per AVCodecContext stuff.
1818
     * - encoding: set by execute()
1819
     * - decoding: set by execute()
1820
     */
1821
    void *thread_opaque;
1822

    
1823
    /**
1824
     * Motion estimation threshold below which no motion estimation is
1825
     * performed, but instead the user specified motion vectors are used.
1826
     *
1827
     * - encoding: Set by user.
1828
     * - decoding: unused
1829
     */
1830
     int me_threshold;
1831

    
1832
    /**
1833
     * Macroblock threshold below which the user specified macroblock types will be used.
1834
     * - encoding: Set by user.
1835
     * - decoding: unused
1836
     */
1837
     int mb_threshold;
1838

    
1839
    /**
1840
     * precision of the intra DC coefficient - 8
1841
     * - encoding: Set by user.
1842
     * - decoding: unused
1843
     */
1844
     int intra_dc_precision;
1845

    
1846
    /**
1847
     * noise vs. sse weight for the nsse comparsion function
1848
     * - encoding: Set by user.
1849
     * - decoding: unused
1850
     */
1851
     int nsse_weight;
1852

    
1853
    /**
1854
     * Number of macroblock rows at the top which are skipped.
1855
     * - encoding: unused
1856
     * - decoding: Set by user.
1857
     */
1858
     int skip_top;
1859

    
1860
    /**
1861
     * Number of macroblock rows at the bottom which are skipped.
1862
     * - encoding: unused
1863
     * - decoding: Set by user.
1864
     */
1865
     int skip_bottom;
1866

    
1867
    /**
1868
     * profile
1869
     * - encoding: Set by user.
1870
     * - decoding: Set by libavcodec.
1871
     */
1872
     int profile;
1873
#define FF_PROFILE_UNKNOWN -99
1874
#define FF_PROFILE_AAC_MAIN 0
1875
#define FF_PROFILE_AAC_LOW  1
1876
#define FF_PROFILE_AAC_SSR  2
1877
#define FF_PROFILE_AAC_LTP  3
1878

    
1879
    /**
1880
     * level
1881
     * - encoding: Set by user.
1882
     * - decoding: Set by libavcodec.
1883
     */
1884
     int level;
1885
#define FF_LEVEL_UNKNOWN -99
1886

    
1887
    /**
1888
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1889
     * - encoding: unused
1890
     * - decoding: Set by user.
1891
     */
1892
     int lowres;
1893

    
1894
    /**
1895
     * Bitstream width / height, may be different from width/height if lowres
1896
     * or other things are used.
1897
     * - encoding: unused
1898
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1899
     */
1900
    int coded_width, coded_height;
1901

    
1902
    /**
1903
     * frame skip threshold
1904
     * - encoding: Set by user.
1905
     * - decoding: unused
1906
     */
1907
    int frame_skip_threshold;
1908

    
1909
    /**
1910
     * frame skip factor
1911
     * - encoding: Set by user.
1912
     * - decoding: unused
1913
     */
1914
    int frame_skip_factor;
1915

    
1916
    /**
1917
     * frame skip exponent
1918
     * - encoding: Set by user.
1919
     * - decoding: unused
1920
     */
1921
    int frame_skip_exp;
1922

    
1923
    /**
1924
     * frame skip comparison function
1925
     * - encoding: Set by user.
1926
     * - decoding: unused
1927
     */
1928
    int frame_skip_cmp;
1929

    
1930
    /**
1931
     * Border processing masking, raises the quantizer for mbs on the borders
1932
     * of the picture.
1933
     * - encoding: Set by user.
1934
     * - decoding: unused
1935
     */
1936
    float border_masking;
1937

    
1938
    /**
1939
     * minimum MB lagrange multipler
1940
     * - encoding: Set by user.
1941
     * - decoding: unused
1942
     */
1943
    int mb_lmin;
1944

    
1945
    /**
1946
     * maximum MB lagrange multipler
1947
     * - encoding: Set by user.
1948
     * - decoding: unused
1949
     */
1950
    int mb_lmax;
1951

    
1952
    /**
1953
     *
1954
     * - encoding: Set by user.
1955
     * - decoding: unused
1956
     */
1957
    int me_penalty_compensation;
1958

    
1959
    /**
1960
     *
1961
     * - encoding: unused
1962
     * - decoding: Set by user.
1963
     */
1964
    enum AVDiscard skip_loop_filter;
1965

    
1966
    /**
1967
     *
1968
     * - encoding: unused
1969
     * - decoding: Set by user.
1970
     */
1971
    enum AVDiscard skip_idct;
1972

    
1973
    /**
1974
     *
1975
     * - encoding: unused
1976
     * - decoding: Set by user.
1977
     */
1978
    enum AVDiscard skip_frame;
1979

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

    
1987
    /**
1988
     *
1989
     * - encoding: Set by user.
1990
     * - decoding: unused
1991
     */
1992
    int brd_scale;
1993

    
1994
    /**
1995
     * constant rate factor - quality-based VBR - values ~correspond to qps
1996
     * - encoding: Set by user.
1997
     * - decoding: unused
1998
     */
1999
    float crf;
2000

    
2001
    /**
2002
     * constant quantization parameter rate control method
2003
     * - encoding: Set by user.
2004
     * - decoding: unused
2005
     */
2006
    int cqp;
2007

    
2008
    /**
2009
     * minimum GOP size
2010
     * - encoding: Set by user.
2011
     * - decoding: unused
2012
     */
2013
    int keyint_min;
2014

    
2015
    /**
2016
     * number of reference frames
2017
     * - encoding: Set by user.
2018
     * - decoding: unused
2019
     */
2020
    int refs;
2021

    
2022
    /**
2023
     * chroma qp offset from luma
2024
     * - encoding: Set by user.
2025
     * - decoding: unused
2026
     */
2027
    int chromaoffset;
2028

    
2029
    /**
2030
     * Influences how often B-frames are used.
2031
     * - encoding: Set by user.
2032
     * - decoding: unused
2033
     */
2034
    int bframebias;
2035

    
2036
    /**
2037
     * trellis RD quantization
2038
     * - encoding: Set by user.
2039
     * - decoding: unused
2040
     */
2041
    int trellis;
2042

    
2043
    /**
2044
     * Reduce fluctuations in qp (before curve compression).
2045
     * - encoding: Set by user.
2046
     * - decoding: unused
2047
     */
2048
    float complexityblur;
2049

    
2050
    /**
2051
     * in-loop deblocking filter alphac0 parameter
2052
     * alpha is in the range -6...6
2053
     * - encoding: Set by user.
2054
     * - decoding: unused
2055
     */
2056
    int deblockalpha;
2057

    
2058
    /**
2059
     * in-loop deblocking filter beta parameter
2060
     * beta is in the range -6...6
2061
     * - encoding: Set by user.
2062
     * - decoding: unused
2063
     */
2064
    int deblockbeta;
2065

    
2066
    /**
2067
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2068
     * - encoding: Set by user.
2069
     * - decoding: unused
2070
     */
2071
    int partitions;
2072
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2073
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2074
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2075
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2076
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2077

    
2078
    /**
2079
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2080
     * - encoding: Set by user.
2081
     * - decoding: unused
2082
     */
2083
    int directpred;
2084

    
2085
    /**
2086
     * Audio cutoff bandwidth (0 means "automatic")
2087
     * - encoding: Set by user.
2088
     * - decoding: unused
2089
     */
2090
    int cutoff;
2091

    
2092
    /**
2093
     * Multiplied by qscale for each frame and added to scene_change_score.
2094
     * - encoding: Set by user.
2095
     * - decoding: unused
2096
     */
2097
    int scenechange_factor;
2098

    
2099
    /**
2100
     *
2101
     * Note: Value depends upon the compare function used for fullpel ME.
2102
     * - encoding: Set by user.
2103
     * - decoding: unused
2104
     */
2105
    int mv0_threshold;
2106

    
2107
    /**
2108
     * Adjusts sensitivity of b_frame_strategy 1.
2109
     * - encoding: Set by user.
2110
     * - decoding: unused
2111
     */
2112
    int b_sensitivity;
2113

    
2114
    /**
2115
     * - encoding: Set by user.
2116
     * - decoding: unused
2117
     */
2118
    int compression_level;
2119
#define FF_COMPRESSION_DEFAULT -1
2120

    
2121
    /**
2122
     * Sets whether to use LPC mode - used by FLAC encoder.
2123
     * - encoding: Set by user.
2124
     * - decoding: unused
2125
     */
2126
    int use_lpc;
2127

    
2128
    /**
2129
     * LPC coefficient precision - used by FLAC encoder
2130
     * - encoding: Set by user.
2131
     * - decoding: unused
2132
     */
2133
    int lpc_coeff_precision;
2134

    
2135
    /**
2136
     * - encoding: Set by user.
2137
     * - decoding: unused
2138
     */
2139
    int min_prediction_order;
2140

    
2141
    /**
2142
     * - encoding: Set by user.
2143
     * - decoding: unused
2144
     */
2145
    int max_prediction_order;
2146

    
2147
    /**
2148
     * search method for selecting prediction order
2149
     * - encoding: Set by user.
2150
     * - decoding: unused
2151
     */
2152
    int prediction_order_method;
2153

    
2154
    /**
2155
     * - encoding: Set by user.
2156
     * - decoding: unused
2157
     */
2158
    int min_partition_order;
2159

    
2160
    /**
2161
     * - encoding: Set by user.
2162
     * - decoding: unused
2163
     */
2164
    int max_partition_order;
2165

    
2166
    /**
2167
     * GOP timecode frame start number, in non drop frame format
2168
     * - encoding: Set by user.
2169
     * - decoding: unused
2170
     */
2171
    int64_t timecode_frame_start;
2172

    
2173
    /**
2174
     * Decoder should decode to this many channels if it can (0 for default)
2175
     * - encoding: unused
2176
     * - decoding: Set by user.
2177
     */
2178
    int request_channels;
2179

    
2180
    /**
2181
     * Percentage of dynamic range compression to be applied by the decoder.
2182
     * The default value is 1.0, corresponding to full compression.
2183
     * - encoding: unused
2184
     * - decoding: Set by user.
2185
     */
2186
    float drc_scale;
2187
} AVCodecContext;
2188

    
2189
/**
2190
 * AVCodec.
2191
 */
2192
typedef struct AVCodec {
2193
    /**
2194
     * Name of the codec implementation.
2195
     * The name is globally unique among encoders and among decoders (but an
2196
     * encoder and a decoder can share the same name).
2197
     * This is the primary way to find a codec from the user perspective.
2198
     */
2199
    const char *name;
2200
    enum CodecType type;
2201
    enum CodecID id;
2202
    int priv_data_size;
2203
    int (*init)(AVCodecContext *);
2204
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2205
    int (*close)(AVCodecContext *);
2206
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2207
                  const uint8_t *buf, int buf_size);
2208
    int capabilities;
2209
    struct AVCodec *next;
2210
    void (*flush)(AVCodecContext *);
2211
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2212
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2213
} AVCodec;
2214

    
2215
/**
2216
 * four components are given, that's all.
2217
 * the last component is alpha
2218
 */
2219
typedef struct AVPicture {
2220
    uint8_t *data[4];
2221
    int linesize[4];       ///< number of bytes per line
2222
} AVPicture;
2223

    
2224
/**
2225
 * AVPaletteControl
2226
 * This structure defines a method for communicating palette changes
2227
 * between and demuxer and a decoder.
2228
 *
2229
 * @deprecated Use AVPacket to send palette changes instead.
2230
 * This is totally broken.
2231
 */
2232
#define AVPALETTE_SIZE 1024
2233
#define AVPALETTE_COUNT 256
2234
typedef struct AVPaletteControl {
2235

    
2236
    /* Demuxer sets this to 1 to indicate the palette has changed;
2237
     * decoder resets to 0. */
2238
    int palette_changed;
2239

    
2240
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2241
     * the individual palette components should be on a 8-bit scale; if
2242
     * the palette data comes from an IBM VGA native format, the component
2243
     * data is probably 6 bits in size and needs to be scaled. */
2244
    unsigned int palette[AVPALETTE_COUNT];
2245

    
2246
} AVPaletteControl attribute_deprecated;
2247

    
2248
typedef struct AVSubtitleRect {
2249
    uint16_t x;
2250
    uint16_t y;
2251
    uint16_t w;
2252
    uint16_t h;
2253
    uint16_t nb_colors;
2254
    int linesize;
2255
    uint32_t *rgba_palette;
2256
    uint8_t *bitmap;
2257
} AVSubtitleRect;
2258

    
2259
typedef struct AVSubtitle {
2260
    uint16_t format; /* 0 = graphics */
2261
    uint32_t start_display_time; /* relative to packet pts, in ms */
2262
    uint32_t end_display_time; /* relative to packet pts, in ms */
2263
    uint32_t num_rects;
2264
    AVSubtitleRect *rects;
2265
} AVSubtitle;
2266

    
2267

    
2268
/* resample.c */
2269

    
2270
struct ReSampleContext;
2271
struct AVResampleContext;
2272

    
2273
typedef struct ReSampleContext ReSampleContext;
2274

    
2275
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2276
                                     int output_rate, int input_rate);
2277
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2278
void audio_resample_close(ReSampleContext *s);
2279

    
2280
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2281
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2282
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2283
void av_resample_close(struct AVResampleContext *c);
2284

    
2285
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2286
/* YUV420 format is assumed ! */
2287

    
2288
/**
2289
 * @deprecated Use the software scaler (swscale) instead.
2290
 */
2291
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2292

    
2293
/**
2294
 * @deprecated Use the software scaler (swscale) instead.
2295
 */
2296
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2297
                                      int input_width, int input_height);
2298

    
2299
/**
2300
 * @deprecated Use the software scaler (swscale) instead.
2301
 */
2302
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2303
                                      int iwidth, int iheight,
2304
                                      int topBand, int bottomBand,
2305
                                      int leftBand, int rightBand,
2306
                                      int padtop, int padbottom,
2307
                                      int padleft, int padright);
2308

    
2309
/**
2310
 * @deprecated Use the software scaler (swscale) instead.
2311
 */
2312
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2313
                  AVPicture *output, const AVPicture *input);
2314

    
2315
/**
2316
 * @deprecated Use the software scaler (swscale) instead.
2317
 */
2318
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2319

    
2320
#endif
2321

    
2322
/**
2323
 * Allocate memory for a picture.  Call avpicture_free to free it.
2324
 *
2325
 * @param picture the picture to be filled in
2326
 * @param pix_fmt the format of the picture
2327
 * @param width the width of the picture
2328
 * @param height the height of the picture
2329
 * @return zero if successful, a negative value if not
2330
 */
2331
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2332

    
2333
/**
2334
 * Free a picture previously allocated by avpicture_alloc().
2335
 *
2336
 * @param picture the AVPicture to be freed
2337
 */
2338
void avpicture_free(AVPicture *picture);
2339

    
2340
/**
2341
 * Fill in the AVPicture fields.
2342
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2343
 * which points to the image data buffer. Depending on the specified picture
2344
 * format, one or multiple image data pointers and line sizes will be set.
2345
 * If a planar format is specified, several pointers will be set pointing to
2346
 * the different picture planes and the line sizes of the different planes
2347
 * will be stored in the lines_sizes array.
2348
 *
2349
 * @param picture AVPicture whose fields are to be filled in
2350
 * @param ptr Buffer which will contain or contains the actual image data
2351
 * @param pix_fmt The format in which the picture data is stored.
2352
 * @param width the width of the image in pixels
2353
 * @param height the height of the image in pixels
2354
 * @return size of the image data in bytes
2355
 */
2356
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2357
                   int pix_fmt, int width, int height);
2358
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2359
                     unsigned char *dest, int dest_size);
2360

    
2361
/**
2362
 * Calculate the size in bytes that a picture of the given width and height
2363
 * would occupy if stored in the given picture format.
2364
 *
2365
 * @param pix_fmt the given picture format
2366
 * @param width the width of the image
2367
 * @param height the height of the image
2368
 * @return Image data size in bytes
2369
 */
2370
int avpicture_get_size(int pix_fmt, int width, int height);
2371
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2372
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2373
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2374
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2375
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2376

    
2377
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2378
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2379
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2380
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2381
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2382
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2383

    
2384
/**
2385
 * Computes what kind of losses will occur when converting from one specific
2386
 * pixel format to another.
2387
 * When converting from one pixel format to another, information loss may occur.
2388
 * For example, when converting from RGB24 to GRAY, the color information will
2389
 * be lost. Similarly, other losses occur when converting from some formats to
2390
 * other formats. These losses can involve loss of chroma, but also loss of
2391
 * resolution, loss of color depth, loss due to the color space conversion, loss
2392
 * of the alpha bits or loss due to color quantization.
2393
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2394
 * which will occur when converting from one pixel format to another.
2395
 *
2396
 * @param[in] dst_pix_fmt destination pixel format
2397
 * @param[in] src_pix_fmt source pixel format
2398
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2399
 * @return Combination of flags informing you what kind of losses will occur.
2400
 */
2401
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2402
                             int has_alpha);
2403

    
2404
/**
2405
 * Finds the best pixel format to convert to given a certain source pixel
2406
 * format.  When converting from one pixel format to another, information loss
2407
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2408
 * information will be lost. Similarly, other losses occur when converting from
2409
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2410
 * the given pixel formats should be used to suffer the least amount of loss.
2411
 * The pixel formats from which it chooses one, are determined by the
2412
 * \p pix_fmt_mask parameter.
2413
 *
2414
 * @code
2415
 * src_pix_fmt = PIX_FMT_YUV420P;
2416
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2417
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2418
 * @endcode
2419
 *
2420
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2421
 * @param[in] src_pix_fmt source pixel format
2422
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2423
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2424
 * @return The best pixel format to convert to or -1 if none was found.
2425
 */
2426
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2427
                              int has_alpha, int *loss_ptr);
2428

    
2429

    
2430
/**
2431
 * Print in buf the string corresponding to the pixel format with
2432
 * number pix_fmt, or an header if pix_fmt is negative.
2433
 *
2434
 * @param[in] buf the buffer where to write the string
2435
 * @param[in] buf_size the size of buf
2436
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2437
 * a negative value to print the corresponding header.
2438
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2439
 */
2440
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2441

    
2442
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2443
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2444

    
2445
/**
2446
 * Tell if an image really has transparent alpha values.
2447
 * @return ored mask of FF_ALPHA_xxx constants
2448
 */
2449
int img_get_alpha_info(const AVPicture *src,
2450
                       int pix_fmt, int width, int height);
2451

    
2452
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2453
/**
2454
 * convert among pixel formats
2455
 * @deprecated Use the software scaler (swscale) instead.
2456
 */
2457
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2458
                const AVPicture *src, int pix_fmt,
2459
                int width, int height);
2460
#endif
2461

    
2462
/* deinterlace a picture */
2463
/* deinterlace - if not supported return -1 */
2464
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2465
                          int pix_fmt, int width, int height);
2466

    
2467
/* external high level API */
2468

    
2469
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2470
extern AVCodec *first_avcodec;
2471
#endif
2472
AVCodec *av_codec_next(AVCodec *c);
2473

    
2474
/* returns LIBAVCODEC_VERSION_INT constant */
2475
unsigned avcodec_version(void);
2476
/* returns LIBAVCODEC_BUILD constant */
2477
unsigned avcodec_build(void);
2478

    
2479
/**
2480
 * Initializes libavcodec.
2481
 *
2482
 * @warning This function \e must be called before any other libavcodec
2483
 * function.
2484
 */
2485
void avcodec_init(void);
2486

    
2487
void register_avcodec(AVCodec *format);
2488

    
2489
/**
2490
 * Finds a registered encoder with a matching codec ID.
2491
 *
2492
 * @param id CodecID of the requested encoder
2493
 * @return An encoder if one was found, NULL otherwise.
2494
 */
2495
AVCodec *avcodec_find_encoder(enum CodecID id);
2496

    
2497
/**
2498
 * Finds a registered encoder with the specified name.
2499
 *
2500
 * @param name name of the requested encoder
2501
 * @return An encoder if one was found, NULL otherwise.
2502
 */
2503
AVCodec *avcodec_find_encoder_by_name(const char *name);
2504

    
2505
/**
2506
 * Finds a registered decoder with a matching codec ID.
2507
 *
2508
 * @param id CodecID of the requested decoder
2509
 * @return A decoder if one was found, NULL otherwise.
2510
 */
2511
AVCodec *avcodec_find_decoder(enum CodecID id);
2512

    
2513
/**
2514
 * Finds a registered decoder with the specified name.
2515
 *
2516
 * @param name name of the requested decoder
2517
 * @return A decoder if one was found, NULL otherwise.
2518
 */
2519
AVCodec *avcodec_find_decoder_by_name(const char *name);
2520
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2521

    
2522
/**
2523
 * Sets the fields of the given AVCodecContext to default values.
2524
 *
2525
 * @param s The AVCodecContext of which the fields should be set to default values.
2526
 */
2527
void avcodec_get_context_defaults(AVCodecContext *s);
2528

    
2529
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2530
 *  we WILL change its arguments and name a few times! */
2531
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2532

    
2533
/**
2534
 * Allocates an AVCodecContext and sets its fields to default values.  The
2535
 * resulting struct can be deallocated by simply calling av_free().
2536
 *
2537
 * @return An AVCodecContext filled with default values or NULL on failure.
2538
 * @see avcodec_get_context_defaults
2539
 */
2540
AVCodecContext *avcodec_alloc_context(void);
2541

    
2542
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2543
 *  we WILL change its arguments and name a few times! */
2544
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2545

    
2546
/**
2547
 * Sets the fields of the given AVFrame to default values.
2548
 *
2549
 * @param pic The AVFrame of which the fields should be set to default values.
2550
 */
2551
void avcodec_get_frame_defaults(AVFrame *pic);
2552

    
2553
/**
2554
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2555
 * struct can be deallocated by simply calling av_free().
2556
 *
2557
 * @return An AVFrame filled with default values or NULL on failure.
2558
 * @see avcodec_get_frame_defaults
2559
 */
2560
AVFrame *avcodec_alloc_frame(void);
2561

    
2562
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2563
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2564
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2565
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2566

    
2567
/**
2568
 * Checks if the given dimension of a picture is valid, meaning that all
2569
 * bytes of the picture can be addressed with a signed int.
2570
 *
2571
 * @param[in] w Width of the picture.
2572
 * @param[in] h Height of the picture.
2573
 * @return Zero if valid, a negative value if invalid.
2574
 */
2575
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2576
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2577

    
2578
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2579
void avcodec_thread_free(AVCodecContext *s);
2580
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2581
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2582
//FIXME func typedef
2583

    
2584
/**
2585
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2586
 * function the context has to be allocated.
2587
 *
2588
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2589
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2590
 * retrieving a codec.
2591
 *
2592
 * @warning This function is not thread safe!
2593
 *
2594
 * @code
2595
 * avcodec_register_all();
2596
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2597
 * if (!codec)
2598
 *     exit(1);
2599
 *
2600
 * context = avcodec_alloc_context();
2601
 *
2602
 * if (avcodec_open(context, codec) < 0)
2603
 *     exit(1);
2604
 * @endcode
2605
 *
2606
 * @param avctx The context which will be set up to use the given codec.
2607
 * @param codec The codec to use within the context.
2608
 * @return zero on success, a negative value on error
2609
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2610
 */
2611
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2612

    
2613
/**
2614
 * @deprecated Use avcodec_decode_audio2() instead.
2615
 */
2616
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2617
                         int *frame_size_ptr,
2618
                         const uint8_t *buf, int buf_size);
2619

    
2620
/**
2621
 * Decodes an audio frame from \p buf into \p samples.
2622
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2623
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2624
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2625
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2626
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2627
 * decompressed frame size in \e bytes.
2628
 *
2629
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2630
 * output buffer before calling avcodec_decode_audio2().
2631
 *
2632
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2633
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2634
 * bits at once and could read over the end.
2635
 *
2636
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2637
 * no overreading happens for damaged MPEG streams.
2638
 *
2639
 * @note You might have to align the input buffer \p buf and output buffer \p
2640
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2641
 * necessary at all, on others it won't work at all if not aligned and on others
2642
 * it will work but it will have an impact on performance. In practice, the
2643
 * bitstream should have 4 byte alignment at minimum and all sample data should
2644
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2645
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2646
 * start of the buffer to 16.
2647
 *
2648
 * @param avctx the codec context
2649
 * @param[out] samples the output buffer
2650
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2651
 * @param[in] buf the input buffer
2652
 * @param[in] buf_size the input buffer size in bytes
2653
 * @return On error a negative value is returned, otherwise the number of bytes
2654
 * used or zero if no frame could be decompressed.
2655
 */
2656
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2657
                         int *frame_size_ptr,
2658
                         const uint8_t *buf, int buf_size);
2659

    
2660
/**
2661
 * Decodes a video frame from \p buf into \p picture.
2662
 * The avcodec_decode_video() function decodes a video frame from the input
2663
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2664
 * video codec which was coupled with \p avctx using avcodec_open(). The
2665
 * resulting decoded frame is stored in \p picture.
2666
 *
2667
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2668
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2669
 * bits at once and could read over the end.
2670
 *
2671
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2672
 * no overreading happens for damaged MPEG streams.
2673
 *
2674
 * @note You might have to align the input buffer \p buf and output buffer \p
2675
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2676
 * necessary at all, on others it won't work at all if not aligned and on others
2677
 * it will work but it will have an impact on performance. In practice, the
2678
 * bitstream should have 4 byte alignment at minimum and all sample data should
2679
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2680
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2681
 * start of the buffer to 16.
2682
 *
2683
 * @param avctx the codec context
2684
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2685
 * @param[in] buf the input buffer
2686
 * @param[in] buf_size the size of the input buffer in bytes
2687
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2688
 * @return On error a negative value is returned, otherwise the number of bytes
2689
 * used or zero if no frame could be decompressed.
2690
 */
2691
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2692
                         int *got_picture_ptr,
2693
                         const uint8_t *buf, int buf_size);
2694

    
2695
/* Decode a subtitle message. Return -1 if error, otherwise return the
2696
 * number of bytes used. If no subtitle could be decompressed,
2697
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2698
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2699
                            int *got_sub_ptr,
2700
                            const uint8_t *buf, int buf_size);
2701
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2702
                        int *data_size_ptr,
2703
                        uint8_t *buf, int buf_size);
2704

    
2705
/**
2706
 * Encodes an audio frame from \p samples into \p buf.
2707
 * The avcodec_encode_audio() function encodes an audio frame from the input
2708
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2709
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2710
 * stored in output buffer \p buf.
2711
 *
2712
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2713
 *
2714
 * @param avctx the codec context
2715
 * @param[out] buf the output buffer
2716
 * @param[in] buf_size the output buffer size
2717
 * @param[in] samples the input buffer containing the samples
2718
 * The number of samples read from this buffer is frame_size*channels,
2719
 * both of which are defined in \p avctx.
2720
 * @return On error a negative value is returned, on success zero or the number
2721
 * of bytes used to encode the data read from the input buffer.
2722
 */
2723
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2724
                         const short *samples);
2725

    
2726
/**
2727
 * Encodes a video frame from \p pict into \p buf.
2728
 * The avcodec_encode_video() function encodes a video frame from the input
2729
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2730
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2731
 * frame are stored in the output buffer \p buf. The input picture should be
2732
 * stored using a specific format, namely \c avctx.pix_fmt.
2733
 *
2734
 * @param avctx the codec context
2735
 * @param[out] buf the output buffer for the bitstream of encoded frame
2736
 * @param[in] buf_size the size of the output buffer in bytes
2737
 * @param[in] pict the input picture to encode
2738
 * @return On error a negative value is returned, on success zero or the number
2739
 * of bytes used from the input buffer.
2740
 */
2741
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2742
                         const AVFrame *pict);
2743
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2744
                            const AVSubtitle *sub);
2745

    
2746
int avcodec_close(AVCodecContext *avctx);
2747

    
2748
void avcodec_register_all(void);
2749

    
2750
/**
2751
 * Flush buffers, should be called when seeking or when switching to a different stream.
2752
 */
2753
void avcodec_flush_buffers(AVCodecContext *avctx);
2754

    
2755
void avcodec_default_free_buffers(AVCodecContext *s);
2756

    
2757
/* misc useful functions */
2758

    
2759
/**
2760
 * Returns a single letter to describe the given picture type \p pict_type.
2761
 *
2762
 * @param[in] pict_type the picture type
2763
 * @return A single character representing the picture type.
2764
 */
2765
char av_get_pict_type_char(int pict_type);
2766

    
2767
/**
2768
 * Returns codec bits per sample.
2769
 *
2770
 * @param[in] codec_id the codec
2771
 * @return Number of bits per sample or zero if unknown for the given codec.
2772
 */
2773
int av_get_bits_per_sample(enum CodecID codec_id);
2774

    
2775
/**
2776
 * Returns sample format bits per sample.
2777
 *
2778
 * @param[in] sample_fmt the sample format
2779
 * @return Number of bits per sample or zero if unknown for the given sample format.
2780
 */
2781
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2782

    
2783
/* frame parsing */
2784
typedef struct AVCodecParserContext {
2785
    void *priv_data;
2786
    struct AVCodecParser *parser;
2787
    int64_t frame_offset; /* offset of the current frame */
2788
    int64_t cur_offset; /* current offset
2789
                           (incremented by each av_parser_parse()) */
2790
    int64_t last_frame_offset; /* offset of the last frame */
2791
    /* video info */
2792
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2793
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2794
    int64_t pts;     /* pts of the current frame */
2795
    int64_t dts;     /* dts of the current frame */
2796

    
2797
    /* private data */
2798
    int64_t last_pts;
2799
    int64_t last_dts;
2800
    int fetch_timestamp;
2801

    
2802
#define AV_PARSER_PTS_NB 4
2803
    int cur_frame_start_index;
2804
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2805
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2806
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2807

    
2808
    int flags;
2809
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2810

    
2811
    int64_t offset;      ///< byte offset from starting packet start
2812
    int64_t last_offset;
2813
} AVCodecParserContext;
2814

    
2815
typedef struct AVCodecParser {
2816
    int codec_ids[5]; /* several codec IDs are permitted */
2817
    int priv_data_size;
2818
    int (*parser_init)(AVCodecParserContext *s);
2819
    int (*parser_parse)(AVCodecParserContext *s,
2820
                        AVCodecContext *avctx,
2821
                        const uint8_t **poutbuf, int *poutbuf_size,
2822
                        const uint8_t *buf, int buf_size);
2823
    void (*parser_close)(AVCodecParserContext *s);
2824
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2825
    struct AVCodecParser *next;
2826
} AVCodecParser;
2827

    
2828
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2829
extern AVCodecParser *av_first_parser;
2830
#endif
2831
AVCodecParser *av_parser_next(AVCodecParser *c);
2832

    
2833
void av_register_codec_parser(AVCodecParser *parser);
2834
AVCodecParserContext *av_parser_init(int codec_id);
2835
int av_parser_parse(AVCodecParserContext *s,
2836
                    AVCodecContext *avctx,
2837
                    uint8_t **poutbuf, int *poutbuf_size,
2838
                    const uint8_t *buf, int buf_size,
2839
                    int64_t pts, int64_t dts);
2840
int av_parser_change(AVCodecParserContext *s,
2841
                     AVCodecContext *avctx,
2842
                     uint8_t **poutbuf, int *poutbuf_size,
2843
                     const uint8_t *buf, int buf_size, int keyframe);
2844
void av_parser_close(AVCodecParserContext *s);
2845

    
2846

    
2847
typedef struct AVBitStreamFilterContext {
2848
    void *priv_data;
2849
    struct AVBitStreamFilter *filter;
2850
    AVCodecParserContext *parser;
2851
    struct AVBitStreamFilterContext *next;
2852
} AVBitStreamFilterContext;
2853

    
2854

    
2855
typedef struct AVBitStreamFilter {
2856
    const char *name;
2857
    int priv_data_size;
2858
    int (*filter)(AVBitStreamFilterContext *bsfc,
2859
                  AVCodecContext *avctx, const char *args,
2860
                  uint8_t **poutbuf, int *poutbuf_size,
2861
                  const uint8_t *buf, int buf_size, int keyframe);
2862
    void (*close)(AVBitStreamFilterContext *bsfc);
2863
    struct AVBitStreamFilter *next;
2864
} AVBitStreamFilter;
2865

    
2866
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2867
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2868
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2869
                               AVCodecContext *avctx, const char *args,
2870
                               uint8_t **poutbuf, int *poutbuf_size,
2871
                               const uint8_t *buf, int buf_size, int keyframe);
2872
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2873

    
2874
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2875

    
2876
/* memory */
2877

    
2878
/**
2879
 * Reallocates the given block if it is not large enough, otherwise it
2880
 * does nothing.
2881
 *
2882
 * @see av_realloc
2883
 */
2884
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2885

    
2886
/* for static data only */
2887

    
2888
/**
2889
 * Frees all static arrays and resets their pointers to 0.
2890
 * Call this function to release all statically allocated tables.
2891
 *
2892
 * @deprecated. Code which uses av_free_static is broken/misdesigned
2893
 * and should correctly use static arrays
2894
 *
2895
 */
2896
attribute_deprecated void av_free_static(void);
2897

    
2898
/**
2899
 * Allocation of static arrays.
2900
 *
2901
 * @warning Do not use for normal allocation.
2902
 *
2903
 * @param[in] size The amount of memory you need in bytes.
2904
 * @return block of memory of the requested size
2905
 * @deprecated. Code which uses av_mallocz_static is broken/misdesigned
2906
 * and should correctly use static arrays
2907
 */
2908
attribute_deprecated void *av_mallocz_static(unsigned int size);
2909

    
2910
/**
2911
 * Copy image 'src' to 'dst'.
2912
 */
2913
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2914
              int pix_fmt, int width, int height);
2915

    
2916
/**
2917
 * Crop image top and left side.
2918
 */
2919
int av_picture_crop(AVPicture *dst, const AVPicture *src,
2920
             int pix_fmt, int top_band, int left_band);
2921

    
2922
/**
2923
 * Pad image.
2924
 */
2925
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2926
            int padtop, int padbottom, int padleft, int padright, int *color);
2927

    
2928
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2929
/**
2930
 * @deprecated Use the software scaler (swscale) instead.
2931
 */
2932
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
2933
              int pix_fmt, int width, int height);
2934

    
2935
/**
2936
 * @deprecated Use the software scaler (swscale) instead.
2937
 */
2938
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
2939
             int pix_fmt, int top_band, int left_band);
2940

    
2941
/**
2942
 * @deprecated Use the software scaler (swscale) instead.
2943
 */
2944
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2945
            int padtop, int padbottom, int padleft, int padright, int *color);
2946
#endif
2947

    
2948
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2949

    
2950
/**
2951
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
2952
 *
2953
 * @return 0 in case of a successful parsing, a negative value otherwise
2954
 * @param[in] str the string to parse: it has to be a string in the format
2955
 * <width>x<height> or a valid video frame size abbreviation.
2956
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
2957
 * frame width value
2958
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
2959
 * frame height value
2960
 */
2961
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
2962

    
2963
/**
2964
 * Parses \p str and put in \p frame_rate the detected values.
2965
 *
2966
 * @return 0 in case of a successful parsing, a negative value otherwise
2967
 * @param[in] str the string to parse: it has to be a string in the format
2968
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
2969
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
2970
 * frame rate
2971
 */
2972
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
2973

    
2974
/* error handling */
2975
#if EINVAL > 0
2976
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
2977
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
2978
#else
2979
/* Some platforms have E* and errno already negated. */
2980
#define AVERROR(e) (e)
2981
#define AVUNERROR(e) (e)
2982
#endif
2983
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
2984
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
2985
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
2986
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
2987
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
2988
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
2989
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
2990
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
2991
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
2992

    
2993
#endif /* FFMPEG_AVCODEC_H */