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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 St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#ifndef AVCODEC_H
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#define 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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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "avutil.h"
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#include <sys/types.h> /* size_t */
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#define AV_STRINGIFY(s)         AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBAVCODEC_VERSION_INT  ((51<<16)+(40<<8)+2)
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#define LIBAVCODEC_VERSION      51.40.2
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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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 *
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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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    /* 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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    /* 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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    /* 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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    /* 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_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_NB
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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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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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/* motion estimation type, EPZS by default */
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enum Motion_Est_ID {
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    ME_ZERO = 1,
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,
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    ME_X1,
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    ME_HEX,
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    ME_UMH,
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    ME_ITER,
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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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/* 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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#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 location instead
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                                            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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/* Unsupported options :
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 *              Syntax Arithmetic coding (SAC)
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 *              Reference Picture Selection
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 *              Independent Segment Decoding */
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/* /Fx */
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/* codec capabilities */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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/**
411
 * Codec uses get_buffer() for allocating buffers.
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 * direct rendering method 1
413
 */
414
#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). */
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#define CODEC_CAP_HWACCEL         0x0010
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/**
421
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
422
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
423
 */
424
#define CODEC_CAP_DELAY           0x0020
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/**
426
 * Codec can be fed a final frame with a smaller size.
427
 * This can be used to prevent truncation of the last audio samples.
428
 */
429
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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431
//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
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#define MB_TYPE_DIRECT2     0x0100 //FIXME
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#define MB_TYPE_ACPRED     0x0200
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#define MB_TYPE_GMC        0x0400
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#define MB_TYPE_SKIP       0x0800
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#define MB_TYPE_P0L0       0x1000
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#define MB_TYPE_P1L0       0x2000
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#define MB_TYPE_P0L1       0x4000
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#define MB_TYPE_P1L1       0x8000
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#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
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#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
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#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
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#define MB_TYPE_QUANT      0x00010000
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#define MB_TYPE_CBP        0x00020000
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//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
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455
/**
456
 * Pan Scan area.
457
 * This specifies the area which should be displayed.
458
 * Note there may be multiple such areas for one frame.
459
 */
460
typedef struct AVPanScan{
461
    /**
462
     * id
463
     * - encoding: Set by user.
464
     * - decoding: Set by libavcodec.
465
     */
466
    int id;
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468
    /**
469
     * width and height in 1/16 pel
470
     * - encoding: Set by user.
471
     * - decoding: Set by libavcodec.
472
     */
473
    int width;
474
    int height;
475

    
476
    /**
477
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
478
     * - encoding: Set by user.
479
     * - decoding: Set by libavcodec.
480
     */
481
    int16_t position[3][2];
482
}AVPanScan;
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484
#define FF_COMMON_FRAME \
485
    /**\
486
     * pointer to the picture planes.\
487
     * This might be different from the first allocated byte\
488
     * - encoding: \
489
     * - decoding: \
490
     */\
491
    uint8_t *data[4];\
492
    int linesize[4];\
493
    /**\
494
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
495
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
496
     * - encoding: \
497
     * - decoding: \
498
     */\
499
    uint8_t *base[4];\
500
    /**\
501
     * 1 -> keyframe, 0-> not\
502
     * - encoding: Set by libavcodec.\
503
     * - decoding: Set by libavcodec.\
504
     */\
505
    int key_frame;\
506
\
507
    /**\
508
     * Picture type of the frame, see ?_TYPE below.\
509
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
510
     * - decoding: Set by libavcodec.\
511
     */\
512
    int pict_type;\
513
\
514
    /**\
515
     * presentation timestamp in time_base units (time when frame should be shown to user)\
516
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
517
     * - encoding: MUST be set by user.\
518
     * - decoding: Set by libavcodec.\
519
     */\
520
    int64_t pts;\
521
\
522
    /**\
523
     * picture number in bitstream order\
524
     * - encoding: set by\
525
     * - decoding: Set by libavcodec.\
526
     */\
527
    int coded_picture_number;\
528
    /**\
529
     * picture number in display order\
530
     * - encoding: set by\
531
     * - decoding: Set by libavcodec.\
532
     */\
533
    int display_picture_number;\
534
\
535
    /**\
536
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
537
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
538
     * - decoding: Set by libavcodec.\
539
     */\
540
    int quality; \
541
\
542
    /**\
543
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
544
     * Set to INT_MAX if the buffer has not been used yet.\
545
     * - encoding: unused\
546
     * - decoding: MUST be set by get_buffer().\
547
     */\
548
    int age;\
549
\
550
    /**\
551
     * is this picture used as reference\
552
     * - encoding: unused\
553
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
554
     */\
555
    int reference;\
556
\
557
    /**\
558
     * QP table\
559
     * - encoding: unused\
560
     * - decoding: Set by libavcodec.\
561
     */\
562
    int8_t *qscale_table;\
563
    /**\
564
     * QP store stride\
565
     * - encoding: unused\
566
     * - decoding: Set by libavcodec.\
567
     */\
568
    int qstride;\
569
\
570
    /**\
571
     * mbskip_table[mb]>=1 if MB didn't change\
572
     * stride= mb_width = (width+15)>>4\
573
     * - encoding: unused\
574
     * - decoding: Set by libavcodec.\
575
     */\
576
    uint8_t *mbskip_table;\
577
\
578
    /**\
579
     * motion vector table\
580
     * @code\
581
     * example:\
582
     * int mv_sample_log2= 4 - motion_subsample_log2;\
583
     * int mb_width= (width+15)>>4;\
584
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
585
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
586
     * @endcode\
587
     * - encoding: Set by user.\
588
     * - decoding: Set by libavcodec.\
589
     */\
590
    int16_t (*motion_val[2])[2];\
591
\
592
    /**\
593
     * macroblock type table\
594
     * mb_type_base + mb_width + 2\
595
     * - encoding: Set by user.\
596
     * - decoding: Set by libavcodec.\
597
     */\
598
    uint32_t *mb_type;\
599
\
600
    /**\
601
     * log2 of the size of the block which a single vector in motion_val represents: \
602
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
603
     * - encoding: unused\
604
     * - decoding: Set by libavcodec.\
605
     */\
606
    uint8_t motion_subsample_log2;\
607
\
608
    /**\
609
     * for some private data of the user\
610
     * - encoding: unused\
611
     * - decoding: Set by user.\
612
     */\
613
    void *opaque;\
614
\
615
    /**\
616
     * error\
617
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
618
     * - decoding: unused\
619
     */\
620
    uint64_t error[4];\
621
\
622
    /**\
623
     * type of the buffer (to keep track of who has to deallocate data[*])\
624
     * - encoding: Set by the one who allocates it.\
625
     * - decoding: Set by the one who allocates it.\
626
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
627
     */\
628
    int type;\
629
    \
630
    /**\
631
     * When decoding, this signals how much the picture must be delayed.\
632
     * extra_delay = repeat_pict / (2*fps)\
633
     * - encoding: unused\
634
     * - decoding: Set by libavcodec.\
635
     */\
636
    int repeat_pict;\
637
    \
638
    /**\
639
     * \
640
     */\
641
    int qscale_type;\
642
    \
643
    /**\
644
     * The content of the picture is interlaced.\
645
     * - encoding: Set by user.\
646
     * - decoding: Set by libavcodec. (default 0)\
647
     */\
648
    int interlaced_frame;\
649
    \
650
    /**\
651
     * If the content is interlaced, is top field displayed first.\
652
     * - encoding: Set by user.\
653
     * - decoding: Set by libavcodec.\
654
     */\
655
    int top_field_first;\
656
    \
657
    /**\
658
     * Pan scan.\
659
     * - encoding: Set by user.\
660
     * - decoding: Set by libavcodec.\
661
     */\
662
    AVPanScan *pan_scan;\
663
    \
664
    /**\
665
     * Tell user application that palette has changed from previous frame.\
666
     * - encoding: ??? (no palette-enabled encoder yet)\
667
     * - decoding: Set by libavcodec. (default 0).\
668
     */\
669
    int palette_has_changed;\
670
    \
671
    /**\
672
     * codec suggestion on buffer type if != 0\
673
     * - encoding: unused\
674
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
675
     */\
676
    int buffer_hints;\
677
\
678
    /**\
679
     * DCT coefficients\
680
     * - encoding: unused\
681
     * - decoding: Set by libavcodec.\
682
     */\
683
    short *dct_coeff;\
684
\
685
    /**\
686
     * motion referece frame index\
687
     * - encoding: Set by user.\
688
     * - decoding: Set by libavcodec.\
689
     */\
690
    int8_t *ref_index[2];
691

    
692
#define FF_QSCALE_TYPE_MPEG1 0
693
#define FF_QSCALE_TYPE_MPEG2 1
694
#define FF_QSCALE_TYPE_H264  2
695

    
696
#define FF_BUFFER_TYPE_INTERNAL 1
697
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
698
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
699
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
700

    
701

    
702
#define FF_I_TYPE 1 // Intra
703
#define FF_P_TYPE 2 // Predicted
704
#define FF_B_TYPE 3 // Bi-dir predicted
705
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
706
#define FF_SI_TYPE 5
707
#define FF_SP_TYPE 6
708

    
709
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
710
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
711
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
712
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
713

    
714
/**
715
 * Audio Video Frame.
716
 */
717
typedef struct AVFrame {
718
    FF_COMMON_FRAME
719
} AVFrame;
720

    
721
#define DEFAULT_FRAME_RATE_BASE 1001000
722

    
723
/**
724
 * main external API structure
725
 */
726
typedef struct AVCodecContext {
727
    /**
728
     * information on struct for av_log
729
     * - set by avcodec_alloc_context
730
     */
731
    AVClass *av_class;
732
    /**
733
     * the average bitrate
734
     * - encoding: Set by user; unused for constant quantizer encoding.
735
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
736
     */
737
    int bit_rate;
738

    
739
    /**
740
     * number of bits the bitstream is allowed to diverge from the reference.
741
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
742
     * - encoding: Set by user; unused for constant quantizer encoding.
743
     * - decoding: unused
744
     */
745
    int bit_rate_tolerance;
746

    
747
    /**
748
     * CODEC_FLAG_*.
749
     * - encoding: Set by user.
750
     * - decoding: Set by user.
751
     */
752
    int flags;
753

    
754
    /**
755
     * Some codecs need additional format info. It is stored here.
756
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
757
     * specific codec MUST set it correctly otherwise stream copy breaks.
758
     * In general use of this field by muxers is not recommanded.
759
     * - encoding: Set by libavcodec.
760
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
761
     */
762
    int sub_id;
763

    
764
    /**
765
     * Motion estimation algorithm used for video coding.
766
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
767
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
768
     * - encoding: MUST be set by user.
769
     * - decoding: unused
770
     */
771
    int me_method;
772

    
773
    /**
774
     * some codecs need / can use extradata like Huffman tables.
775
     * mjpeg: Huffman tables
776
     * rv10: additional flags
777
     * mpeg4: global headers (they can be in the bitstream or here)
778
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
779
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
780
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
781
     * - encoding: Set/allocated/freed by libavcodec.
782
     * - decoding: Set/allocated/freed by user.
783
     */
784
    uint8_t *extradata;
785
    int extradata_size;
786

    
787
    /**
788
     * This is the fundamental unit of time (in seconds) in terms
789
     * of which frame timestamps are represented. For fixed-fps content,
790
     * timebase should be 1/framerate and timestamp increments should be
791
     * identically 1.
792
     * - encoding: MUST be set by user.
793
     * - decoding: Set by libavcodec.
794
     */
795
    AVRational time_base;
796

    
797
    /* video only */
798
    /**
799
     * picture width / height.
800
     * - encoding: MUST be set by user.
801
     * - decoding: Set by libavcodec.
802
     * Note: For compatibility it is possible to set this instead of
803
     * coded_width/height before decoding.
804
     */
805
    int width, height;
806

    
807
#define FF_ASPECT_EXTENDED 15
808

    
809
    /**
810
     * the number of pictures in a group of pictures, or 0 for intra_only
811
     * - encoding: Set by user.
812
     * - decoding: unused
813
     */
814
    int gop_size;
815

    
816
    /**
817
     * Pixel format, see PIX_FMT_xxx.
818
     * - encoding: Set by user.
819
     * - decoding: Set by libavcodec.
820
     */
821
    enum PixelFormat pix_fmt;
822

    
823
    /**
824
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
825
     * has to read frames at native frame rate.
826
     * - encoding: Set by user.
827
     * - decoding: unused
828
     */
829
    int rate_emu;
830

    
831
    /**
832
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
833
     * decoder to draw a horizontal band. It improves cache usage. Not
834
     * all codecs can do that. You must check the codec capabilities
835
     * beforehand.
836
     * - encoding: unused
837
     * - decoding: Set by user.
838
     * @param height the height of the slice
839
     * @param y the y position of the slice
840
     * @param type 1->top field, 2->bottom field, 3->frame
841
     * @param offset offset into the AVFrame.data from which the slice should be read
842
     */
843
    void (*draw_horiz_band)(struct AVCodecContext *s,
844
                            const AVFrame *src, int offset[4],
845
                            int y, int type, int height);
846

    
847
    /* audio only */
848
    int sample_rate; ///< samples per second
849
    int channels;
850

    
851
    /**
852
     * audio sample format
853
     * - encoding: Set by user.
854
     * - decoding: Set by libavcodec.
855
     */
856
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
857

    
858
    /* The following data should not be initialized. */
859
    /**
860
     * Samples per packet, initialized when calling 'init'.
861
     */
862
    int frame_size;
863
    int frame_number;   ///< audio or video frame number
864
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
865

    
866
    /**
867
     * Number of frames the decoded output will be delayed relative to
868
     * the encoded input.
869
     * - encoding: Set by libavcodec.
870
     * - decoding: unused
871
     */
872
    int delay;
873

    
874
    /* - encoding parameters */
875
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
876
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
877

    
878
    /**
879
     * minimum quantizer
880
     * - encoding: Set by user.
881
     * - decoding: unused
882
     */
883
    int qmin;
884

    
885
    /**
886
     * maximum quantizer
887
     * - encoding: Set by user.
888
     * - decoding: unused
889
     */
890
    int qmax;
891

    
892
    /**
893
     * maximum quantizer difference between frames
894
     * - encoding: Set by user.
895
     * - decoding: unused
896
     */
897
    int max_qdiff;
898

    
899
    /**
900
     * maximum number of B-frames between non-B-frames
901
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
902
     * - encoding: Set by user.
903
     * - decoding: unused
904
     */
905
    int max_b_frames;
906

    
907
    /**
908
     * qscale factor between IP and B-frames
909
     * - encoding: Set by user.
910
     * - decoding: unused
911
     */
912
    float b_quant_factor;
913

    
914
    /** obsolete FIXME remove */
915
    int rc_strategy;
916
#define FF_RC_STRATEGY_XVID 1
917

    
918
    int b_frame_strategy;
919

    
920
    /**
921
     * hurry up amount
922
     * - encoding: unused
923
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
924
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
925
     */
926
    int hurry_up;
927

    
928
    struct AVCodec *codec;
929

    
930
    void *priv_data;
931

    
932
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
933
    /* unused, FIXME remove*/
934
    int rtp_mode;
935
#endif
936

    
937
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
938
                            /* do its best to deliver a chunk with size     */
939
                            /* below rtp_payload_size, the chunk will start */
940
                            /* with a start code on some codecs like H.263. */
941
                            /* This doesn't take account of any particular  */
942
                            /* headers inside the transmitted RTP payload.  */
943

    
944

    
945
    /* The RTP callback: This function is called    */
946
    /* every time the encoder has a packet to send. */
947
    /* It depends on the encoder if the data starts */
948
    /* with a Start Code (it should). H.263 does.   */
949
    /* mb_nb contains the number of macroblocks     */
950
    /* encoded in the RTP payload.                  */
951
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
952

    
953
    /* statistics, used for 2-pass encoding */
954
    int mv_bits;
955
    int header_bits;
956
    int i_tex_bits;
957
    int p_tex_bits;
958
    int i_count;
959
    int p_count;
960
    int skip_count;
961
    int misc_bits;
962

    
963
    /**
964
     * number of bits used for the previously encoded frame
965
     * - encoding: Set by libavcodec.
966
     * - decoding: unused
967
     */
968
    int frame_bits;
969

    
970
    /**
971
     * Private data of the user, can be used to carry app specific stuff.
972
     * - encoding: Set by user.
973
     * - decoding: Set by user.
974
     */
975
    void *opaque;
976

    
977
    char codec_name[32];
978
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
979
    enum CodecID codec_id; /* see CODEC_ID_xxx */
980

    
981
    /**
982
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
983
     * This is used to work around some encoder bugs.
984
     * A demuxer should set this to what is stored in the field used to identify the codec.
985
     * If there are multiple such fields in a container then the demuxer should choose the one
986
     * which maximizes the information about the used codec.
987
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
988
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
989
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
990
     * first.
991
     * - encoding: Set by user, if not then the default based on codec_id will be used.
992
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
993
     */
994
    unsigned int codec_tag;
995

    
996
    /**
997
     * Work around bugs in encoders which sometimes cannot be detected automatically.
998
     * - encoding: Set by user
999
     * - decoding: Set by user
1000
     */
1001
    int workaround_bugs;
1002
#define FF_BUG_AUTODETECT       1  ///< autodetection
1003
#define FF_BUG_OLD_MSMPEG4      2
1004
#define FF_BUG_XVID_ILACE       4
1005
#define FF_BUG_UMP4             8
1006
#define FF_BUG_NO_PADDING       16
1007
#define FF_BUG_AMV              32
1008
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1009
#define FF_BUG_QPEL_CHROMA      64
1010
#define FF_BUG_STD_QPEL         128
1011
#define FF_BUG_QPEL_CHROMA2     256
1012
#define FF_BUG_DIRECT_BLOCKSIZE 512
1013
#define FF_BUG_EDGE             1024
1014
#define FF_BUG_HPEL_CHROMA      2048
1015
#define FF_BUG_DC_CLIP          4096
1016
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1017
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1018

    
1019
    /**
1020
     * luma single coefficient elimination threshold
1021
     * - encoding: Set by user.
1022
     * - decoding: unused
1023
     */
1024
    int luma_elim_threshold;
1025

    
1026
    /**
1027
     * chroma single coeff elimination threshold
1028
     * - encoding: Set by user.
1029
     * - decoding: unused
1030
     */
1031
    int chroma_elim_threshold;
1032

    
1033
    /**
1034
     * strictly follow the standard (MPEG4, ...).
1035
     * - encoding: Set by user.
1036
     * - decoding: unused
1037
     */
1038
    int strict_std_compliance;
1039
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1040
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1041
#define FF_COMPLIANCE_NORMAL        0
1042
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1043
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1044

    
1045
    /**
1046
     * qscale offset between IP and B-frames
1047
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1048
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1049
     * - encoding: Set by user.
1050
     * - decoding: unused
1051
     */
1052
    float b_quant_offset;
1053

    
1054
    /**
1055
     * Error resilience; higher values will detect more errors but may
1056
     * misdetect some more or less valid parts as errors.
1057
     * - encoding: unused
1058
     * - decoding: Set by user.
1059
     */
1060
    int error_resilience;
1061
#define FF_ER_CAREFUL         1
1062
#define FF_ER_COMPLIANT       2
1063
#define FF_ER_AGGRESSIVE      3
1064
#define FF_ER_VERY_AGGRESSIVE 4
1065

    
1066
    /**
1067
     * Called at the beginning of each frame to get a buffer for it.
1068
     * If pic.reference is set then the frame will be read later by libavcodec.
1069
     * avcodec_align_dimensions() should be used to find the required width and
1070
     * height, as they normally need to be rounded up to the next multiple of 16.
1071
     * - encoding: unused
1072
     * - decoding: Set by libavcodec., user can override.
1073
     */
1074
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1075

    
1076
    /**
1077
     * Called to release buffers which where allocated with get_buffer.
1078
     * A released buffer can be reused in get_buffer().
1079
     * pic.data[*] must be set to NULL.
1080
     * - encoding: unused
1081
     * - decoding: Set by libavcodec., user can override.
1082
     */
1083
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1084

    
1085
    /**
1086
     * If 1 the stream has a 1 frame delay during decoding.
1087
     * - encoding: Set by libavcodec.
1088
     * - decoding: Set by libavcodec.
1089
     */
1090
    int has_b_frames;
1091

    
1092
    /**
1093
     * number of bytes per packet if constant and known or 0
1094
     * Used by some WAV based audio codecs.
1095
     */
1096
    int block_align;
1097

    
1098
    int parse_only; /* - decoding only: If true, only parsing is done
1099
                       (function avcodec_parse_frame()). The frame
1100
                       data is returned. Only MPEG codecs support this now. */
1101

    
1102
    /**
1103
     * 0-> h263 quant 1-> mpeg quant
1104
     * - encoding: Set by user.
1105
     * - decoding: unused
1106
     */
1107
    int mpeg_quant;
1108

    
1109
    /**
1110
     * pass1 encoding statistics output buffer
1111
     * - encoding: Set by libavcodec.
1112
     * - decoding: unused
1113
     */
1114
    char *stats_out;
1115

    
1116
    /**
1117
     * pass2 encoding statistics input buffer
1118
     * Concatenated stuff from stats_out of pass1 should be placed here.
1119
     * - encoding: Allocated/set/freed by user.
1120
     * - decoding: unused
1121
     */
1122
    char *stats_in;
1123

    
1124
    /**
1125
     * ratecontrol qmin qmax limiting method
1126
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1127
     * - encoding: Set by user.
1128
     * - decoding: unused
1129
     */
1130
    float rc_qsquish;
1131

    
1132
    float rc_qmod_amp;
1133
    int rc_qmod_freq;
1134

    
1135
    /**
1136
     * ratecontrol override, see RcOverride
1137
     * - encoding: Allocated/set/freed by user.
1138
     * - decoding: unused
1139
     */
1140
    RcOverride *rc_override;
1141
    int rc_override_count;
1142

    
1143
    /**
1144
     * rate control equation
1145
     * - encoding: Set by user
1146
     * - decoding: unused
1147
     */
1148
    char *rc_eq;
1149

    
1150
    /**
1151
     * maximum bitrate
1152
     * - encoding: Set by user.
1153
     * - decoding: unused
1154
     */
1155
    int rc_max_rate;
1156

    
1157
    /**
1158
     * minimum bitrate
1159
     * - encoding: Set by user.
1160
     * - decoding: unused
1161
     */
1162
    int rc_min_rate;
1163

    
1164
    /**
1165
     * decoder bitstream buffer size
1166
     * - encoding: Set by user.
1167
     * - decoding: unused
1168
     */
1169
    int rc_buffer_size;
1170
    float rc_buffer_aggressivity;
1171

    
1172
    /**
1173
     * qscale factor between P and I-frames
1174
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1175
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1176
     * - encoding: Set by user.
1177
     * - decoding: unused
1178
     */
1179
    float i_quant_factor;
1180

    
1181
    /**
1182
     * qscale offset between P and I-frames
1183
     * - encoding: Set by user.
1184
     * - decoding: unused
1185
     */
1186
    float i_quant_offset;
1187

    
1188
    /**
1189
     * initial complexity for pass1 ratecontrol
1190
     * - encoding: Set by user.
1191
     * - decoding: unused
1192
     */
1193
    float rc_initial_cplx;
1194

    
1195
    /**
1196
     * DCT algorithm, see FF_DCT_* below
1197
     * - encoding: Set by user.
1198
     * - decoding: unused
1199
     */
1200
    int dct_algo;
1201
#define FF_DCT_AUTO    0
1202
#define FF_DCT_FASTINT 1
1203
#define FF_DCT_INT     2
1204
#define FF_DCT_MMX     3
1205
#define FF_DCT_MLIB    4
1206
#define FF_DCT_ALTIVEC 5
1207
#define FF_DCT_FAAN    6
1208

    
1209
    /**
1210
     * luminance masking (0-> disabled)
1211
     * - encoding: Set by user.
1212
     * - decoding: unused
1213
     */
1214
    float lumi_masking;
1215

    
1216
    /**
1217
     * temporary complexity masking (0-> disabled)
1218
     * - encoding: Set by user.
1219
     * - decoding: unused
1220
     */
1221
    float temporal_cplx_masking;
1222

    
1223
    /**
1224
     * spatial complexity masking (0-> disabled)
1225
     * - encoding: Set by user.
1226
     * - decoding: unused
1227
     */
1228
    float spatial_cplx_masking;
1229

    
1230
    /**
1231
     * p block masking (0-> disabled)
1232
     * - encoding: Set by user.
1233
     * - decoding: unused
1234
     */
1235
    float p_masking;
1236

    
1237
    /**
1238
     * darkness masking (0-> disabled)
1239
     * - encoding: Set by user.
1240
     * - decoding: unused
1241
     */
1242
    float dark_masking;
1243

    
1244

    
1245
    /* for binary compatibility */
1246
    int unused;
1247

    
1248
    /**
1249
     * IDCT algorithm, see FF_IDCT_* below.
1250
     * - encoding: Set by user.
1251
     * - decoding: Set by user.
1252
     */
1253
    int idct_algo;
1254
#define FF_IDCT_AUTO         0
1255
#define FF_IDCT_INT          1
1256
#define FF_IDCT_SIMPLE       2
1257
#define FF_IDCT_SIMPLEMMX    3
1258
#define FF_IDCT_LIBMPEG2MMX  4
1259
#define FF_IDCT_PS2          5
1260
#define FF_IDCT_MLIB         6
1261
#define FF_IDCT_ARM          7
1262
#define FF_IDCT_ALTIVEC      8
1263
#define FF_IDCT_SH4          9
1264
#define FF_IDCT_SIMPLEARM    10
1265
#define FF_IDCT_H264         11
1266
#define FF_IDCT_VP3          12
1267
#define FF_IDCT_IPP          13
1268
#define FF_IDCT_XVIDMMX      14
1269
#define FF_IDCT_CAVS         15
1270
#define FF_IDCT_SIMPLEARMV5TE 16
1271
#define FF_IDCT_SIMPLEARMV6  17
1272

    
1273
    /**
1274
     * slice count
1275
     * - encoding: Set by libavcodec.
1276
     * - decoding: Set by user (or 0).
1277
     */
1278
    int slice_count;
1279
    /**
1280
     * slice offsets in the frame in bytes
1281
     * - encoding: Set/allocated by libavcodec.
1282
     * - decoding: Set/allocated by user (or NULL).
1283
     */
1284
    int *slice_offset;
1285

    
1286
    /**
1287
     * error concealment flags
1288
     * - encoding: unused
1289
     * - decoding: Set by user.
1290
     */
1291
    int error_concealment;
1292
#define FF_EC_GUESS_MVS   1
1293
#define FF_EC_DEBLOCK     2
1294

    
1295
    /**
1296
     * dsp_mask could be add used to disable unwanted CPU features
1297
     * CPU features (i.e. MMX, SSE. ...)
1298
     *
1299
     * With the FORCE flag you may instead enable given CPU features.
1300
     * (Dangerous: Usable in case of misdetection, improper usage however will
1301
     * result into program crash.)
1302
     */
1303
    unsigned dsp_mask;
1304
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1305
    /* lower 16 bits - CPU features */
1306
#ifdef HAVE_MMX
1307
#define FF_MM_MMX      0x0001 /* standard MMX */
1308
#define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1309
#define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1310
#define FF_MM_SSE      0x0008 /* SSE functions */
1311
#define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1312
#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1313
#endif /* HAVE_MMX */
1314
#ifdef HAVE_IWMMXT
1315
#define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1316
#endif /* HAVE_IWMMXT */
1317

    
1318
    /**
1319
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1320
     * - encoding: Set by libavcodec.
1321
     * - decoding: Set by user.
1322
     */
1323
     int bits_per_sample;
1324

    
1325
    /**
1326
     * prediction method (needed for huffyuv)
1327
     * - encoding: Set by user.
1328
     * - decoding: unused
1329
     */
1330
     int prediction_method;
1331
#define FF_PRED_LEFT   0
1332
#define FF_PRED_PLANE  1
1333
#define FF_PRED_MEDIAN 2
1334

    
1335
    /**
1336
     * sample aspect ratio (0 if unknown)
1337
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1338
     * - encoding: Set by user.
1339
     * - decoding: Set by libavcodec.
1340
     */
1341
    AVRational sample_aspect_ratio;
1342

    
1343
    /**
1344
     * the picture in the bitstream
1345
     * - encoding: Set by libavcodec.
1346
     * - decoding: Set by libavcodec.
1347
     */
1348
    AVFrame *coded_frame;
1349

    
1350
    /**
1351
     * debug
1352
     * - encoding: Set by user.
1353
     * - decoding: Set by user.
1354
     */
1355
    int debug;
1356
#define FF_DEBUG_PICT_INFO 1
1357
#define FF_DEBUG_RC        2
1358
#define FF_DEBUG_BITSTREAM 4
1359
#define FF_DEBUG_MB_TYPE   8
1360
#define FF_DEBUG_QP        16
1361
#define FF_DEBUG_MV        32
1362
#define FF_DEBUG_DCT_COEFF 0x00000040
1363
#define FF_DEBUG_SKIP      0x00000080
1364
#define FF_DEBUG_STARTCODE 0x00000100
1365
#define FF_DEBUG_PTS       0x00000200
1366
#define FF_DEBUG_ER        0x00000400
1367
#define FF_DEBUG_MMCO      0x00000800
1368
#define FF_DEBUG_BUGS      0x00001000
1369
#define FF_DEBUG_VIS_QP    0x00002000
1370
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1371

    
1372
    /**
1373
     * debug
1374
     * - encoding: Set by user.
1375
     * - decoding: Set by user.
1376
     */
1377
    int debug_mv;
1378
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1379
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1380
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1381

    
1382
    /**
1383
     * error
1384
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1385
     * - decoding: unused
1386
     */
1387
    uint64_t error[4];
1388

    
1389
    /**
1390
     * minimum MB quantizer
1391
     * - encoding: unused
1392
     * - decoding: unused
1393
     */
1394
    int mb_qmin;
1395

    
1396
    /**
1397
     * maximum MB quantizer
1398
     * - encoding: unused
1399
     * - decoding: unused
1400
     */
1401
    int mb_qmax;
1402

    
1403
    /**
1404
     * motion estimation comparison function
1405
     * - encoding: Set by user.
1406
     * - decoding: unused
1407
     */
1408
    int me_cmp;
1409
    /**
1410
     * subpixel motion estimation comparison function
1411
     * - encoding: Set by user.
1412
     * - decoding: unused
1413
     */
1414
    int me_sub_cmp;
1415
    /**
1416
     * macroblock comparison function (not supported yet)
1417
     * - encoding: Set by user.
1418
     * - decoding: unused
1419
     */
1420
    int mb_cmp;
1421
    /**
1422
     * interlaced DCT comparison function
1423
     * - encoding: Set by user.
1424
     * - decoding: unused
1425
     */
1426
    int ildct_cmp;
1427
#define FF_CMP_SAD  0
1428
#define FF_CMP_SSE  1
1429
#define FF_CMP_SATD 2
1430
#define FF_CMP_DCT  3
1431
#define FF_CMP_PSNR 4
1432
#define FF_CMP_BIT  5
1433
#define FF_CMP_RD   6
1434
#define FF_CMP_ZERO 7
1435
#define FF_CMP_VSAD 8
1436
#define FF_CMP_VSSE 9
1437
#define FF_CMP_NSSE 10
1438
#define FF_CMP_W53  11
1439
#define FF_CMP_W97  12
1440
#define FF_CMP_DCTMAX 13
1441
#define FF_CMP_DCT264 14
1442
#define FF_CMP_CHROMA 256
1443

    
1444
    /**
1445
     * ME diamond size & shape
1446
     * - encoding: Set by user.
1447
     * - decoding: unused
1448
     */
1449
    int dia_size;
1450

    
1451
    /**
1452
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1453
     * - encoding: Set by user.
1454
     * - decoding: unused
1455
     */
1456
    int last_predictor_count;
1457

    
1458
    /**
1459
     * prepass for motion estimation
1460
     * - encoding: Set by user.
1461
     * - decoding: unused
1462
     */
1463
    int pre_me;
1464

    
1465
    /**
1466
     * motion estimation prepass comparison function
1467
     * - encoding: Set by user.
1468
     * - decoding: unused
1469
     */
1470
    int me_pre_cmp;
1471

    
1472
    /**
1473
     * ME prepass diamond size & shape
1474
     * - encoding: Set by user.
1475
     * - decoding: unused
1476
     */
1477
    int pre_dia_size;
1478

    
1479
    /**
1480
     * subpel ME quality
1481
     * - encoding: Set by user.
1482
     * - decoding: unused
1483
     */
1484
    int me_subpel_quality;
1485

    
1486
    /**
1487
     * callback to negotiate the pixelFormat
1488
     * @param fmt is the list of formats which are supported by the codec,
1489
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1490
     * The first is always the native one.
1491
     * @return the chosen format
1492
     * - encoding: unused
1493
     * - decoding: Set by user, if not set the native format will be chosen.
1494
     */
1495
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1496

    
1497
    /**
1498
     * DTG active format information (additional aspect ratio
1499
     * information only used in DVB MPEG-2 transport streams)
1500
     * 0 if not set.
1501
     *
1502
     * - encoding: unused
1503
     * - decoding: Set by decoder.
1504
     */
1505
    int dtg_active_format;
1506
#define FF_DTG_AFD_SAME         8
1507
#define FF_DTG_AFD_4_3          9
1508
#define FF_DTG_AFD_16_9         10
1509
#define FF_DTG_AFD_14_9         11
1510
#define FF_DTG_AFD_4_3_SP_14_9  13
1511
#define FF_DTG_AFD_16_9_SP_14_9 14
1512
#define FF_DTG_AFD_SP_4_3       15
1513

    
1514
    /**
1515
     * maximum motion estimation search range in subpel units
1516
     * If 0 then no limit.
1517
     *
1518
     * - encoding: Set by user.
1519
     * - decoding: unused
1520
     */
1521
    int me_range;
1522

    
1523
    /**
1524
     * intra quantizer bias
1525
     * - encoding: Set by user.
1526
     * - decoding: unused
1527
     */
1528
    int intra_quant_bias;
1529
#define FF_DEFAULT_QUANT_BIAS 999999
1530

    
1531
    /**
1532
     * inter quantizer bias
1533
     * - encoding: Set by user.
1534
     * - decoding: unused
1535
     */
1536
    int inter_quant_bias;
1537

    
1538
    /**
1539
     * color table ID
1540
     * - encoding: unused
1541
     * - decoding: Which clrtable should be used for 8bit RGB images.
1542
     *             Tables have to be stored somewhere. FIXME
1543
     */
1544
    int color_table_id;
1545

    
1546
    /**
1547
     * internal_buffer count
1548
     * Don't touch, used by libavcodec default_get_buffer().
1549
     */
1550
    int internal_buffer_count;
1551

    
1552
    /**
1553
     * internal_buffers
1554
     * Don't touch, used by libavcodec default_get_buffer().
1555
     */
1556
    void *internal_buffer;
1557

    
1558
#define FF_LAMBDA_SHIFT 7
1559
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1560
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1561
#define FF_LAMBDA_MAX (256*128-1)
1562

    
1563
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1564
    /**
1565
     * Global quality for codecs which cannot change it per frame.
1566
     * This should be proportional to MPEG-1/2/4 qscale.
1567
     * - encoding: Set by user.
1568
     * - decoding: unused
1569
     */
1570
    int global_quality;
1571

    
1572
#define FF_CODER_TYPE_VLC       0
1573
#define FF_CODER_TYPE_AC        1
1574
#define FF_CODER_TYPE_RAW       2
1575
#define FF_CODER_TYPE_RLE       3
1576
#define FF_CODER_TYPE_DEFLATE   4
1577
    /**
1578
     * coder type
1579
     * - encoding: Set by user.
1580
     * - decoding: unused
1581
     */
1582
    int coder_type;
1583

    
1584
    /**
1585
     * context model
1586
     * - encoding: Set by user.
1587
     * - decoding: unused
1588
     */
1589
    int context_model;
1590
#if 0
1591
    /**
1592
     *
1593
     * - encoding: unused
1594
     * - decoding: Set by user.
1595
     */
1596
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1597
#endif
1598

    
1599
    /**
1600
     * slice flags
1601
     * - encoding: unused
1602
     * - decoding: Set by user.
1603
     */
1604
    int slice_flags;
1605
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1606
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1607
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1608

    
1609
    /**
1610
     * XVideo Motion Acceleration
1611
     * - encoding: forbidden
1612
     * - decoding: set by decoder
1613
     */
1614
    int xvmc_acceleration;
1615

    
1616
    /**
1617
     * macroblock decision mode
1618
     * - encoding: Set by user.
1619
     * - decoding: unused
1620
     */
1621
    int mb_decision;
1622
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1623
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1624
#define FF_MB_DECISION_RD     2        ///< rate distoration
1625

    
1626
    /**
1627
     * custom intra quantization matrix
1628
     * - encoding: Set by user, can be NULL.
1629
     * - decoding: Set by libavcodec.
1630
     */
1631
    uint16_t *intra_matrix;
1632

    
1633
    /**
1634
     * custom inter quantization matrix
1635
     * - encoding: Set by user, can be NULL.
1636
     * - decoding: Set by libavcodec.
1637
     */
1638
    uint16_t *inter_matrix;
1639

    
1640
    /**
1641
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1642
     * This is used to work around some encoder bugs.
1643
     * - encoding: unused
1644
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1645
     */
1646
    unsigned int stream_codec_tag;
1647

    
1648
    /**
1649
     * scene change detection threshold
1650
     * 0 is default, larger means fewer detected scene changes.
1651
     * - encoding: Set by user.
1652
     * - decoding: unused
1653
     */
1654
    int scenechange_threshold;
1655

    
1656
    /**
1657
     * minimum Lagrange multipler
1658
     * - encoding: Set by user.
1659
     * - decoding: unused
1660
     */
1661
    int lmin;
1662

    
1663
    /**
1664
     * maximum Lagrange multipler
1665
     * - encoding: Set by user.
1666
     * - decoding: unused
1667
     */
1668
    int lmax;
1669

    
1670
    /**
1671
     * palette control structure
1672
     * - encoding: ??? (no palette-enabled encoder yet)
1673
     * - decoding: Set by user.
1674
     */
1675
    struct AVPaletteControl *palctrl;
1676

    
1677
    /**
1678
     * noise reduction strength
1679
     * - encoding: Set by user.
1680
     * - decoding: unused
1681
     */
1682
    int noise_reduction;
1683

    
1684
    /**
1685
     * Called at the beginning of a frame to get cr buffer for it.
1686
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1687
     * libavcodec will pass previous buffer in pic, function should return
1688
     * same buffer or new buffer with old frame "painted" into it.
1689
     * If pic.data[0] == NULL must behave like get_buffer().
1690
     * - encoding: unused
1691
     * - decoding: Set by libavcodec., user can override
1692
     */
1693
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1694

    
1695
    /**
1696
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1697
     * - encoding: Set by user.
1698
     * - decoding: unused
1699
     */
1700
    int rc_initial_buffer_occupancy;
1701

    
1702
    /**
1703
     *
1704
     * - encoding: Set by user.
1705
     * - decoding: unused
1706
     */
1707
    int inter_threshold;
1708

    
1709
    /**
1710
     * CODEC_FLAG2_*
1711
     * - encoding: Set by user.
1712
     * - decoding: Set by user.
1713
     */
1714
    int flags2;
1715

    
1716
    /**
1717
     * Simulates errors in the bitstream to test error concealment.
1718
     * - encoding: Set by user.
1719
     * - decoding: unused
1720
     */
1721
    int error_rate;
1722

    
1723
    /**
1724
     * MP3 antialias algorithm, see FF_AA_* below.
1725
     * - encoding: unused
1726
     * - decoding: Set by user.
1727
     */
1728
    int antialias_algo;
1729
#define FF_AA_AUTO    0
1730
#define FF_AA_FASTINT 1 //not implemented yet
1731
#define FF_AA_INT     2
1732
#define FF_AA_FLOAT   3
1733
    /**
1734
     * quantizer noise shaping
1735
     * - encoding: Set by user.
1736
     * - decoding: unused
1737
     */
1738
    int quantizer_noise_shaping;
1739

    
1740
    /**
1741
     * thread count
1742
     * is used to decide how many independent tasks should be passed to execute()
1743
     * - encoding: Set by user.
1744
     * - decoding: Set by user.
1745
     */
1746
    int thread_count;
1747

    
1748
    /**
1749
     * The codec may call this to execute several independent things.
1750
     * It will return only after finishing all tasks.
1751
     * The user may replace this with some multithreaded implementation,
1752
     * the default implementation will execute the parts serially.
1753
     * @param count the number of things to execute
1754
     * - encoding: Set by libavcodec, user can override.
1755
     * - decoding: Set by libavcodec, user can override.
1756
     */
1757
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1758

    
1759
    /**
1760
     * thread opaque
1761
     * Can be used by execute() to store some per AVCodecContext stuff.
1762
     * - encoding: set by execute()
1763
     * - decoding: set by execute()
1764
     */
1765
    void *thread_opaque;
1766

    
1767
    /**
1768
     * Motion estimation threshold below which no motion estimation is
1769
     * performed, but instead the user specified motion vectors are used.
1770
     *
1771
     * - encoding: Set by user.
1772
     * - decoding: unused
1773
     */
1774
     int me_threshold;
1775

    
1776
    /**
1777
     * Macroblock threshold below which the user specified macroblock types will be used.
1778
     * - encoding: Set by user.
1779
     * - decoding: unused
1780
     */
1781
     int mb_threshold;
1782

    
1783
    /**
1784
     * precision of the intra DC coefficient - 8
1785
     * - encoding: Set by user.
1786
     * - decoding: unused
1787
     */
1788
     int intra_dc_precision;
1789

    
1790
    /**
1791
     * noise vs. sse weight for the nsse comparsion function
1792
     * - encoding: Set by user.
1793
     * - decoding: unused
1794
     */
1795
     int nsse_weight;
1796

    
1797
    /**
1798
     * Number of macroblock rows at the top which are skipped.
1799
     * - encoding: unused
1800
     * - decoding: Set by user.
1801
     */
1802
     int skip_top;
1803

    
1804
    /**
1805
     * Number of macroblock rows at the bottom which are skipped.
1806
     * - encoding: unused
1807
     * - decoding: Set by user.
1808
     */
1809
     int skip_bottom;
1810

    
1811
    /**
1812
     * profile
1813
     * - encoding: Set by user.
1814
     * - decoding: Set by libavcodec.
1815
     */
1816
     int profile;
1817
#define FF_PROFILE_UNKNOWN -99
1818

    
1819
    /**
1820
     * level
1821
     * - encoding: Set by user.
1822
     * - decoding: Set by libavcodec.
1823
     */
1824
     int level;
1825
#define FF_LEVEL_UNKNOWN -99
1826

    
1827
    /**
1828
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1829
     * - encoding: unused
1830
     * - decoding: Set by user.
1831
     */
1832
     int lowres;
1833

    
1834
    /**
1835
     * Bitstream width / height, may be different from width/height if lowres
1836
     * or other things are used.
1837
     * - encoding: unused
1838
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1839
     */
1840
    int coded_width, coded_height;
1841

    
1842
    /**
1843
     * frame skip threshold
1844
     * - encoding: Set by user.
1845
     * - decoding: unused
1846
     */
1847
    int frame_skip_threshold;
1848

    
1849
    /**
1850
     * frame skip factor
1851
     * - encoding: Set by user.
1852
     * - decoding: unused
1853
     */
1854
    int frame_skip_factor;
1855

    
1856
    /**
1857
     * frame skip exponent
1858
     * - encoding: Set by user.
1859
     * - decoding: unused
1860
     */
1861
    int frame_skip_exp;
1862

    
1863
    /**
1864
     * frame skip comparison function
1865
     * - encoding: Set by user.
1866
     * - decoding: unused
1867
     */
1868
    int frame_skip_cmp;
1869

    
1870
    /**
1871
     * Border processing masking, raises the quantizer for mbs on the borders
1872
     * of the picture.
1873
     * - encoding: Set by user.
1874
     * - decoding: unused
1875
     */
1876
    float border_masking;
1877

    
1878
    /**
1879
     * minimum MB lagrange multipler
1880
     * - encoding: Set by user.
1881
     * - decoding: unused
1882
     */
1883
    int mb_lmin;
1884

    
1885
    /**
1886
     * maximum MB lagrange multipler
1887
     * - encoding: Set by user.
1888
     * - decoding: unused
1889
     */
1890
    int mb_lmax;
1891

    
1892
    /**
1893
     *
1894
     * - encoding: Set by user.
1895
     * - decoding: unused
1896
     */
1897
    int me_penalty_compensation;
1898

    
1899
    /**
1900
     *
1901
     * - encoding: unused
1902
     * - decoding: Set by user.
1903
     */
1904
    enum AVDiscard skip_loop_filter;
1905

    
1906
    /**
1907
     *
1908
     * - encoding: unused
1909
     * - decoding: Set by user.
1910
     */
1911
    enum AVDiscard skip_idct;
1912

    
1913
    /**
1914
     *
1915
     * - encoding: unused
1916
     * - decoding: Set by user.
1917
     */
1918
    enum AVDiscard skip_frame;
1919

    
1920
    /**
1921
     *
1922
     * - encoding: Set by user.
1923
     * - decoding: unused
1924
     */
1925
    int bidir_refine;
1926

    
1927
    /**
1928
     *
1929
     * - encoding: Set by user.
1930
     * - decoding: unused
1931
     */
1932
    int brd_scale;
1933

    
1934
    /**
1935
     * constant rate factor - quality-based VBR - values ~correspond to qps
1936
     * - encoding: Set by user.
1937
     * - decoding: unused
1938
     */
1939
    float crf;
1940

    
1941
    /**
1942
     * constant quantization parameter rate control method
1943
     * - encoding: Set by user.
1944
     * - decoding: unused
1945
     */
1946
    int cqp;
1947

    
1948
    /**
1949
     * minimum GOP size
1950
     * - encoding: Set by user.
1951
     * - decoding: unused
1952
     */
1953
    int keyint_min;
1954

    
1955
    /**
1956
     * number of reference frames
1957
     * - encoding: Set by user.
1958
     * - decoding: unused
1959
     */
1960
    int refs;
1961

    
1962
    /**
1963
     * chroma qp offset from luma
1964
     * - encoding: Set by user.
1965
     * - decoding: unused
1966
     */
1967
    int chromaoffset;
1968

    
1969
    /**
1970
     * Influences how often B-frames are used.
1971
     * - encoding: Set by user.
1972
     * - decoding: unused
1973
     */
1974
    int bframebias;
1975

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

    
1983
    /**
1984
     * Reduce fluctuations in qp (before curve compression).
1985
     * - encoding: Set by user.
1986
     * - decoding: unused
1987
     */
1988
    float complexityblur;
1989

    
1990
    /**
1991
     * in-loop deblocking filter alphac0 parameter
1992
     * alpha is in the range -6...6
1993
     * - encoding: Set by user.
1994
     * - decoding: unused
1995
     */
1996
    int deblockalpha;
1997

    
1998
    /**
1999
     * in-loop deblocking filter beta parameter
2000
     * beta is in the range -6...6
2001
     * - encoding: Set by user.
2002
     * - decoding: unused
2003
     */
2004
    int deblockbeta;
2005

    
2006
    /**
2007
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2008
     * - encoding: Set by user.
2009
     * - decoding: unused
2010
     */
2011
    int partitions;
2012
#define X264_PART_I4X4 0x001  /* Analyse i4x4 */
2013
#define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
2014
#define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
2015
#define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
2016
#define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
2017

    
2018
    /**
2019
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2020
     * - encoding: Set by user.
2021
     * - decoding: unused
2022
     */
2023
    int directpred;
2024

    
2025
    /**
2026
     * Audio cutoff bandwidth (0 means "automatic"), currently used only by FAAC.
2027
     * - encoding: Set by user.
2028
     * - decoding: unused
2029
     */
2030
    int cutoff;
2031

    
2032
    /**
2033
     * Multiplied by qscale for each frame and added to scene_change_score.
2034
     * - encoding: Set by user.
2035
     * - decoding: unused
2036
     */
2037
    int scenechange_factor;
2038

    
2039
    /**
2040
     *
2041
     * Note: Value depends upon the compare function used for fullpel ME.
2042
     * - encoding: Set by user.
2043
     * - decoding: unused
2044
     */
2045
    int mv0_threshold;
2046

    
2047
    /**
2048
     * Adjusts sensitivity of b_frame_strategy 1.
2049
     * - encoding: Set by user.
2050
     * - decoding: unused
2051
     */
2052
    int b_sensitivity;
2053

    
2054
    /**
2055
     * - encoding: Set by user.
2056
     * - decoding: unused
2057
     */
2058
    int compression_level;
2059
#define FF_COMPRESSION_DEFAULT -1
2060

    
2061
    /**
2062
     * Sets whether to use LPC mode - used by FLAC encoder.
2063
     * - encoding: Set by user.
2064
     * - decoding: unused
2065
     */
2066
    int use_lpc;
2067

    
2068
    /**
2069
     * LPC coefficient precision - used by FLAC encoder
2070
     * - encoding: Set by user.
2071
     * - decoding: unused
2072
     */
2073
    int lpc_coeff_precision;
2074

    
2075
    /**
2076
     * - encoding: Set by user.
2077
     * - decoding: unused
2078
     */
2079
    int min_prediction_order;
2080

    
2081
    /**
2082
     * - encoding: Set by user.
2083
     * - decoding: unused
2084
     */
2085
    int max_prediction_order;
2086

    
2087
    /**
2088
     * search method for selecting prediction order
2089
     * - encoding: Set by user.
2090
     * - decoding: unused
2091
     */
2092
    int prediction_order_method;
2093

    
2094
    /**
2095
     * - encoding: Set by user.
2096
     * - decoding: unused
2097
     */
2098
    int min_partition_order;
2099

    
2100
    /**
2101
     * - encoding: Set by user.
2102
     * - decoding: unused
2103
     */
2104
    int max_partition_order;
2105

    
2106
    /**
2107
     * GOP timecode frame start number, in non drop frame format
2108
     * - encoding: Set by user.
2109
     * - decoding: unused
2110
     */
2111
    int64_t timecode_frame_start;
2112
} AVCodecContext;
2113

    
2114
/**
2115
 * AVCodec.
2116
 */
2117
typedef struct AVCodec {
2118
    const char *name;
2119
    enum CodecType type;
2120
    enum CodecID id;
2121
    int priv_data_size;
2122
    int (*init)(AVCodecContext *);
2123
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2124
    int (*close)(AVCodecContext *);
2125
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2126
                  uint8_t *buf, int buf_size);
2127
    int capabilities;
2128
    struct AVCodec *next;
2129
    void (*flush)(AVCodecContext *);
2130
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2131
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2132
} AVCodec;
2133

    
2134
/**
2135
 * four components are given, that's all.
2136
 * the last component is alpha
2137
 */
2138
typedef struct AVPicture {
2139
    uint8_t *data[4];
2140
    int linesize[4];       ///< number of bytes per line
2141
} AVPicture;
2142

    
2143
/**
2144
 * AVPaletteControl
2145
 * This structure defines a method for communicating palette changes
2146
 * between and demuxer and a decoder.
2147
 * This is totally broken, palette changes should be sent as AVPackets.
2148
 */
2149
#define AVPALETTE_SIZE 1024
2150
#define AVPALETTE_COUNT 256
2151
typedef struct AVPaletteControl {
2152

    
2153
    /* Demuxer sets this to 1 to indicate the palette has changed;
2154
     * decoder resets to 0. */
2155
    int palette_changed;
2156

    
2157
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2158
     * the individual palette components should be on a 8-bit scale; if
2159
     * the palette data comes from an IBM VGA native format, the component
2160
     * data is probably 6 bits in size and needs to be scaled. */
2161
    unsigned int palette[AVPALETTE_COUNT];
2162

    
2163
} AVPaletteControl attribute_deprecated;
2164

    
2165
typedef struct AVSubtitleRect {
2166
    uint16_t x;
2167
    uint16_t y;
2168
    uint16_t w;
2169
    uint16_t h;
2170
    uint16_t nb_colors;
2171
    int linesize;
2172
    uint32_t *rgba_palette;
2173
    uint8_t *bitmap;
2174
} AVSubtitleRect;
2175

    
2176
typedef struct AVSubtitle {
2177
    uint16_t format; /* 0 = graphics */
2178
    uint32_t start_display_time; /* relative to packet pts, in ms */
2179
    uint32_t end_display_time; /* relative to packet pts, in ms */
2180
    uint32_t num_rects;
2181
    AVSubtitleRect *rects;
2182
} AVSubtitle;
2183

    
2184
extern AVCodec ac3_encoder;
2185
extern AVCodec amr_nb_encoder;
2186
extern AVCodec amr_wb_encoder;
2187
extern AVCodec asv1_encoder;
2188
extern AVCodec asv2_encoder;
2189
extern AVCodec bmp_encoder;
2190
extern AVCodec dvvideo_encoder;
2191
extern AVCodec faac_encoder;
2192
extern AVCodec ffv1_encoder;
2193
extern AVCodec ffvhuff_encoder;
2194
extern AVCodec flac_encoder;
2195
extern AVCodec flashsv_encoder;
2196
extern AVCodec flv_encoder;
2197
extern AVCodec gif_encoder;
2198
extern AVCodec h261_encoder;
2199
extern AVCodec h263_encoder;
2200
extern AVCodec h263p_encoder;
2201
extern AVCodec h264_encoder;
2202
extern AVCodec huffyuv_encoder;
2203
extern AVCodec jpegls_encoder;
2204
extern AVCodec libgsm_encoder;
2205
extern AVCodec libgsm_ms_encoder;
2206
extern AVCodec libtheora_encoder;
2207
extern AVCodec ljpeg_encoder;
2208
extern AVCodec mdec_encoder;
2209
extern AVCodec mjpeg_encoder;
2210
extern AVCodec mp2_encoder;
2211
extern AVCodec mp3lame_encoder;
2212
extern AVCodec mpeg1video_encoder;
2213
extern AVCodec mpeg2video_encoder;
2214
extern AVCodec mpeg4_encoder;
2215
extern AVCodec msmpeg4v1_encoder;
2216
extern AVCodec msmpeg4v2_encoder;
2217
extern AVCodec msmpeg4v3_encoder;
2218
extern AVCodec oggvorbis_encoder;
2219
extern AVCodec pam_encoder;
2220
extern AVCodec pbm_encoder;
2221
extern AVCodec pgm_encoder;
2222
extern AVCodec pgmyuv_encoder;
2223
extern AVCodec png_encoder;
2224
extern AVCodec ppm_encoder;
2225
extern AVCodec rv10_encoder;
2226
extern AVCodec rv20_encoder;
2227
extern AVCodec sgi_encoder;
2228
extern AVCodec snow_encoder;
2229
extern AVCodec sonic_encoder;
2230
extern AVCodec sonic_ls_encoder;
2231
extern AVCodec svq1_encoder;
2232
extern AVCodec targa_encoder;
2233
extern AVCodec tiff_encoder;
2234
extern AVCodec vcr1_encoder;
2235
extern AVCodec vorbis_encoder;
2236
extern AVCodec wmav1_encoder;
2237
extern AVCodec wmav2_encoder;
2238
extern AVCodec wmv1_encoder;
2239
extern AVCodec wmv2_encoder;
2240
extern AVCodec x264_encoder;
2241
extern AVCodec xvid_encoder;
2242
extern AVCodec zlib_encoder;
2243
extern AVCodec zmbv_encoder;
2244

    
2245
extern AVCodec aac_decoder;
2246
extern AVCodec aasc_decoder;
2247
extern AVCodec alac_decoder;
2248
extern AVCodec amr_nb_decoder;
2249
extern AVCodec amr_wb_decoder;
2250
extern AVCodec asv1_decoder;
2251
extern AVCodec asv2_decoder;
2252
extern AVCodec avs_decoder;
2253
extern AVCodec bmp_decoder;
2254
extern AVCodec cavs_decoder;
2255
extern AVCodec cinepak_decoder;
2256
extern AVCodec cljr_decoder;
2257
extern AVCodec cook_decoder;
2258
extern AVCodec cscd_decoder;
2259
extern AVCodec cyuv_decoder;
2260
extern AVCodec dca_decoder;
2261
extern AVCodec dnxhd_decoder;
2262
extern AVCodec dsicinaudio_decoder;
2263
extern AVCodec dsicinvideo_decoder;
2264
extern AVCodec dvvideo_decoder;
2265
extern AVCodec dxa_decoder;
2266
extern AVCodec eightbps_decoder;
2267
extern AVCodec ffv1_decoder;
2268
extern AVCodec ffvhuff_decoder;
2269
extern AVCodec flac_decoder;
2270
extern AVCodec flashsv_decoder;
2271
extern AVCodec flic_decoder;
2272
extern AVCodec flv_decoder;
2273
extern AVCodec fourxm_decoder;
2274
extern AVCodec fraps_decoder;
2275
extern AVCodec gif_decoder;
2276
extern AVCodec h261_decoder;
2277
extern AVCodec h263_decoder;
2278
extern AVCodec h263i_decoder;
2279
extern AVCodec h264_decoder;
2280
extern AVCodec huffyuv_decoder;
2281
extern AVCodec idcin_decoder;
2282
extern AVCodec imc_decoder;
2283
extern AVCodec indeo2_decoder;
2284
extern AVCodec indeo3_decoder;
2285
extern AVCodec interplay_dpcm_decoder;
2286
extern AVCodec interplay_video_decoder;
2287
extern AVCodec kmvc_decoder;
2288
extern AVCodec libgsm_decoder;
2289
extern AVCodec libgsm_ms_decoder;
2290
extern AVCodec loco_decoder;
2291
extern AVCodec mace3_decoder;
2292
extern AVCodec mace6_decoder;
2293
extern AVCodec mdec_decoder;
2294
extern AVCodec mjpeg_decoder;
2295
extern AVCodec mjpegb_decoder;
2296
extern AVCodec mmvideo_decoder;
2297
extern AVCodec mp2_decoder;
2298
extern AVCodec mp3_decoder;
2299
extern AVCodec mp3adu_decoder;
2300
extern AVCodec mp3on4_decoder;
2301
extern AVCodec mpc7_decoder;
2302
extern AVCodec mpeg1video_decoder;
2303
extern AVCodec mpeg2video_decoder;
2304
extern AVCodec mpeg4_decoder;
2305
extern AVCodec mpeg4aac_decoder;
2306
extern AVCodec mpeg_xvmc_decoder;
2307
extern AVCodec mpegvideo_decoder;
2308
extern AVCodec msmpeg4v1_decoder;
2309
extern AVCodec msmpeg4v2_decoder;
2310
extern AVCodec msmpeg4v3_decoder;
2311
extern AVCodec msrle_decoder;
2312
extern AVCodec msvideo1_decoder;
2313
extern AVCodec mszh_decoder;
2314
extern AVCodec nuv_decoder;
2315
extern AVCodec oggvorbis_decoder;
2316
extern AVCodec png_decoder;
2317
extern AVCodec qdm2_decoder;
2318
extern AVCodec qdraw_decoder;
2319
extern AVCodec qpeg_decoder;
2320
extern AVCodec qtrle_decoder;
2321
extern AVCodec ra_144_decoder;
2322
extern AVCodec ra_288_decoder;
2323
extern AVCodec roq_decoder;
2324
extern AVCodec roq_dpcm_decoder;
2325
extern AVCodec rpza_decoder;
2326
extern AVCodec rv10_decoder;
2327
extern AVCodec rv20_decoder;
2328
extern AVCodec rv30_decoder;
2329
extern AVCodec rv40_decoder;
2330
extern AVCodec sgi_decoder;
2331
extern AVCodec shorten_decoder;
2332
extern AVCodec smackaud_decoder;
2333
extern AVCodec smacker_decoder;
2334
extern AVCodec smc_decoder;
2335
extern AVCodec snow_decoder;
2336
extern AVCodec sol_dpcm_decoder;
2337
extern AVCodec sonic_decoder;
2338
extern AVCodec sp5x_decoder;
2339
extern AVCodec svq1_decoder;
2340
extern AVCodec svq3_decoder;
2341
extern AVCodec targa_decoder;
2342
extern AVCodec theora_decoder;
2343
extern AVCodec thp_decoder;
2344
extern AVCodec tiertexseqvideo_decoder;
2345
extern AVCodec tiff_decoder;
2346
extern AVCodec truemotion1_decoder;
2347
extern AVCodec truemotion2_decoder;
2348
extern AVCodec truespeech_decoder;
2349
extern AVCodec tscc_decoder;
2350
extern AVCodec tta_decoder;
2351
extern AVCodec ulti_decoder;
2352
extern AVCodec vc1_decoder;
2353
extern AVCodec vcr1_decoder;
2354
extern AVCodec vmdaudio_decoder;
2355
extern AVCodec vmdvideo_decoder;
2356
extern AVCodec vmnc_decoder;
2357
extern AVCodec vorbis_decoder;
2358
extern AVCodec vp3_decoder;
2359
extern AVCodec vp5_decoder;
2360
extern AVCodec vp6_decoder;
2361
extern AVCodec vp6f_decoder;
2362
extern AVCodec vqa_decoder;
2363
extern AVCodec wavpack_decoder;
2364
extern AVCodec wmav1_decoder;
2365
extern AVCodec wmav2_decoder;
2366
extern AVCodec wmv1_decoder;
2367
extern AVCodec wmv2_decoder;
2368
extern AVCodec wmv3_decoder;
2369
extern AVCodec wnv1_decoder;
2370
extern AVCodec ws_snd1_decoder;
2371
extern AVCodec xan_dpcm_decoder;
2372
extern AVCodec xan_wc3_decoder;
2373
extern AVCodec xl_decoder;
2374
extern AVCodec zlib_decoder;
2375
extern AVCodec zmbv_decoder;
2376

    
2377
/* PCM codecs */
2378
#define PCM_CODEC(id, name) \
2379
extern AVCodec name ## _decoder; \
2380
extern AVCodec name ## _encoder
2381

    
2382
PCM_CODEC(CODEC_ID_PCM_ALAW,    pcm_alaw);
2383
PCM_CODEC(CODEC_ID_PCM_MULAW,   pcm_mulaw);
2384
PCM_CODEC(CODEC_ID_PCM_S8,      pcm_s8);
2385
PCM_CODEC(CODEC_ID_PCM_S16BE,   pcm_s16be);
2386
PCM_CODEC(CODEC_ID_PCM_S16LE,   pcm_s16le);
2387
PCM_CODEC(CODEC_ID_PCM_S24BE,   pcm_s24be);
2388
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2389
PCM_CODEC(CODEC_ID_PCM_S24LE,   pcm_s24le);
2390
PCM_CODEC(CODEC_ID_PCM_S32BE,   pcm_s32be);
2391
PCM_CODEC(CODEC_ID_PCM_S32LE,   pcm_s32le);
2392
PCM_CODEC(CODEC_ID_PCM_U8,      pcm_u8);
2393
PCM_CODEC(CODEC_ID_PCM_U16BE,   pcm_u16be);
2394
PCM_CODEC(CODEC_ID_PCM_U16LE,   pcm_u16le);
2395
PCM_CODEC(CODEC_ID_PCM_U24BE,   pcm_u24be);
2396
PCM_CODEC(CODEC_ID_PCM_U24LE,   pcm_u24le);
2397
PCM_CODEC(CODEC_ID_PCM_U32BE,   pcm_u32be);
2398
PCM_CODEC(CODEC_ID_PCM_U32LE,   pcm_u32le);
2399

    
2400
/* ADPCM codecs */
2401

    
2402
PCM_CODEC(CODEC_ID_ADPCM_4XM,     adpcm_4xm);
2403
PCM_CODEC(CODEC_ID_ADPCM_ADX,     adpcm_adx);
2404
PCM_CODEC(CODEC_ID_ADPCM_CT,      adpcm_ct);
2405
PCM_CODEC(CODEC_ID_ADPCM_EA,      adpcm_ea);
2406
PCM_CODEC(CODEC_ID_ADPCM_G726,    adpcm_g726);
2407
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2408
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2409
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT,  adpcm_ima_qt);
2410
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2411
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS,  adpcm_ima_ws);
2412
PCM_CODEC(CODEC_ID_ADPCM_MS,      adpcm_ms);
2413
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2414
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2415
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2416
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG,  adpcm_ima_smjpeg);
2417
PCM_CODEC(CODEC_ID_ADPCM_SWF,     adpcm_swf);
2418
PCM_CODEC(CODEC_ID_ADPCM_XA,      adpcm_xa);
2419
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA,  adpcm_yamaha);
2420

    
2421
#undef PCM_CODEC
2422

    
2423
/* dummy raw video codec */
2424
extern AVCodec rawvideo_decoder;
2425
extern AVCodec rawvideo_encoder;
2426

    
2427
/* the following codecs use external GPL libs */
2428
extern AVCodec dts_decoder;
2429
extern AVCodec liba52_decoder;
2430

    
2431
/* subtitles */
2432
extern AVCodec dvbsub_decoder;
2433
extern AVCodec dvbsub_encoder;
2434
extern AVCodec dvdsub_decoder;
2435
extern AVCodec dvdsub_encoder;
2436

    
2437
/* resample.c */
2438

    
2439
struct ReSampleContext;
2440
struct AVResampleContext;
2441

    
2442
typedef struct ReSampleContext ReSampleContext;
2443

    
2444
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2445
                                     int output_rate, int input_rate);
2446
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2447
void audio_resample_close(ReSampleContext *s);
2448

    
2449
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2450
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2451
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2452
void av_resample_close(struct AVResampleContext *c);
2453

    
2454
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2455
/* YUV420 format is assumed ! */
2456

    
2457
struct ImgReSampleContext attribute_deprecated;
2458

    
2459
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2460

    
2461
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2462
                                      int input_width, int input_height);
2463

    
2464
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2465
                                      int iwidth, int iheight,
2466
                                      int topBand, int bottomBand,
2467
                                      int leftBand, int rightBand,
2468
                                      int padtop, int padbottom,
2469
                                      int padleft, int padright);
2470

    
2471

    
2472
attribute_deprecated void img_resample(ImgReSampleContext *s,
2473
                  AVPicture *output, const AVPicture *input);
2474

    
2475
attribute_deprecated void img_resample_close(ImgReSampleContext *s);
2476

    
2477
#endif
2478

    
2479
/**
2480
 * Allocate memory for a picture.  Call avpicture_free to free it.
2481
 *
2482
 * @param picture the picture to be filled in
2483
 * @param pix_fmt the format of the picture
2484
 * @param width the width of the picture
2485
 * @param height the height of the picture
2486
 * @return zero if successful, a negative value if not
2487
 */
2488
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2489

    
2490
/**
2491
 * Free a picture previously allocated by avpicture_alloc().
2492
 *
2493
 * @param picture the AVPicture to be freed
2494
 */
2495
void avpicture_free(AVPicture *picture);
2496

    
2497
/**
2498
 * Fill in the AVPicture fields.
2499
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2500
 * which points to the image data buffer. Depending on the specified picture
2501
 * format, one or multiple image data pointers and line sizes will be set.
2502
 * If a planar format is specified, several pointers will be set pointing to
2503
 * the different picture planes and the line sizes of the different planes
2504
 * will be stored in the lines_sizes array.
2505
 *
2506
 * @param picture AVPicture whose fields are to be filled in
2507
 * @param ptr Buffer which will contain or contains the actual image data
2508
 * @param pix_fmt The format in which the picture data is stored.
2509
 * @param width the width of the image in pixels
2510
 * @param height the height of the image in pixels
2511
 * @return size of the image data in bytes
2512
 */
2513
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2514
                   int pix_fmt, int width, int height);
2515
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2516
                     unsigned char *dest, int dest_size);
2517

    
2518
/**
2519
 * Calculate the size in bytes that a picture of the given width and height
2520
 * would occupy if stored in the given picture format.
2521
 *
2522
 * @param pix_fmt the given picture format
2523
 * @param width the width of the image
2524
 * @param height the height of the image
2525
 * @return Image data size in bytes
2526
 */
2527
int avpicture_get_size(int pix_fmt, int width, int height);
2528
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2529
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2530
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2531
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2532
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2533

    
2534
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2535
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2536
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2537
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2538
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2539
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2540

    
2541
/**
2542
 * Computes what kind of losses will occur when converting from one specific
2543
 * pixel format to another.
2544
 * When converting from one pixel format to another, information loss may occur.
2545
 * For example, when converting from RGB24 to GRAY, the color information will
2546
 * be lost. Similarly, other losses occur when converting from some formats to
2547
 * other formats. These losses can involve loss of chroma, but also loss of
2548
 * resolution, loss of color depth, loss due to the color space conversion, loss
2549
 * of the alpha bits or loss due to color quantization.
2550
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2551
 * which will occur when converting from one pixel format to another.
2552
 *
2553
 * @param[in] dst_pix_fmt destination pixel format
2554
 * @param[in] src_pix_fmt source pixel format
2555
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2556
 * @return Combination of flags informing you what kind of losses will occur.
2557
 */
2558
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2559
                             int has_alpha);
2560

    
2561
/**
2562
 * Finds the best pixel format to convert to given a certain source pixel
2563
 * format.  When converting from one pixel format to another, information loss
2564
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2565
 * information will be lost. Similarly, other losses occur when converting from
2566
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2567
 * the given pixel formats should be used to suffer the least amount of loss.
2568
 * The pixel formats from which it chooses one, are determined by the
2569
 * \p pix_fmt_mask parameter.
2570
 *
2571
 * @code
2572
 * src_pix_fmt = PIX_FMT_YUV420P;
2573
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2574
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2575
 * @endcode
2576
 *
2577
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2578
 * @param[in] src_pix_fmt source pixel format
2579
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2580
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2581
 * @return The best pixel format to convert to or -1 if none was found.
2582
 */
2583
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2584
                              int has_alpha, int *loss_ptr);
2585

    
2586
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2587
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2588

    
2589
/**
2590
 * Tell if an image really has transparent alpha values.
2591
 * @return ored mask of FF_ALPHA_xxx constants
2592
 */
2593
int img_get_alpha_info(const AVPicture *src,
2594
                       int pix_fmt, int width, int height);
2595

    
2596
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2597
/* convert among pixel formats */
2598
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2599
                const AVPicture *src, int pix_fmt,
2600
                int width, int height);
2601
#endif
2602

    
2603
/* deinterlace a picture */
2604
/* deinterlace - if not supported return -1 */
2605
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2606
                          int pix_fmt, int width, int height);
2607

    
2608
/* external high level API */
2609

    
2610
extern AVCodec *first_avcodec;
2611

    
2612
/* returns LIBAVCODEC_VERSION_INT constant */
2613
unsigned avcodec_version(void);
2614
/* returns LIBAVCODEC_BUILD constant */
2615
unsigned avcodec_build(void);
2616

    
2617
/**
2618
 * Initializes libavcodec.
2619
 *
2620
 * @warning This function \e must be called before any other libavcodec
2621
 * function.
2622
 */
2623
void avcodec_init(void);
2624

    
2625
void register_avcodec(AVCodec *format);
2626

    
2627
/**
2628
 * Finds an encoder with a matching codec ID.
2629
 *
2630
 * @param id CodecID of the requested encoder
2631
 * @return An encoder if one was found, NULL otherwise.
2632
 */
2633
AVCodec *avcodec_find_encoder(enum CodecID id);
2634

    
2635
/**
2636
 * Finds an encoder with the specified name.
2637
 *
2638
 * @param name name of the requested encoder
2639
 * @return An encoder if one was found, NULL otherwise.
2640
 */
2641
AVCodec *avcodec_find_encoder_by_name(const char *name);
2642

    
2643
/**
2644
 * Finds a decoder with a matching codec ID.
2645
 *
2646
 * @param id CodecID of the requested decoder
2647
 * @return A decoder if one was found, NULL otherwise.
2648
 */
2649
AVCodec *avcodec_find_decoder(enum CodecID id);
2650

    
2651
/**
2652
 * Finds an decoder with the specified name.
2653
 *
2654
 * @param name name of the requested decoder
2655
 * @return A decoder if one was found, NULL otherwise.
2656
 */
2657
AVCodec *avcodec_find_decoder_by_name(const char *name);
2658
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2659

    
2660
/**
2661
 * Sets the fields of the given AVCodecContext to default values.
2662
 *
2663
 * @param s The AVCodecContext of which the fields should be set to default values.
2664
 */
2665
void avcodec_get_context_defaults(AVCodecContext *s);
2666

    
2667
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2668
 *  we WILL change its arguments and name a few times! */
2669
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2670

    
2671
/**
2672
 * Allocates an AVCodecContext and sets its fields to default values.  The
2673
 * resulting struct can be deallocated by simply calling av_free().
2674
 *
2675
 * @return An AVCodecContext filled with default values or NULL on failure.
2676
 * @see avcodec_get_context_defaults
2677
 */
2678
AVCodecContext *avcodec_alloc_context(void);
2679

    
2680
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2681
 *  we WILL change its arguments and name a few times! */
2682
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2683

    
2684
/**
2685
 * Sets the fields of the given AVFrame to default values.
2686
 *
2687
 * @param pic The AVFrame of which the fields should be set to default values.
2688
 */
2689
void avcodec_get_frame_defaults(AVFrame *pic);
2690

    
2691
/**
2692
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2693
 * struct can be deallocated by simply calling av_free().
2694
 *
2695
 * @return An AVFrame filled with default values or NULL on failure.
2696
 * @see avcodec_get_frame_defaults
2697
 */
2698
AVFrame *avcodec_alloc_frame(void);
2699

    
2700
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2701
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2702
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2703
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2704

    
2705
/**
2706
 * Checks if the given dimension of a picture is valid, meaning that all
2707
 * bytes of the picture can be addressed with a signed int.
2708
 *
2709
 * @param[in] w Width of the picture.
2710
 * @param[in] h Height of the picture.
2711
 * @return Zero if valid, a negative value if invalid.
2712
 */
2713
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2714
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2715

    
2716
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2717
void avcodec_thread_free(AVCodecContext *s);
2718
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2719
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2720
//FIXME func typedef
2721

    
2722
/**
2723
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2724
 * function the context has to be allocated.
2725
 *
2726
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2727
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2728
 * retrieving a codec.
2729
 *
2730
 * @warning This function is not thread safe!
2731
 *
2732
 * @code
2733
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2734
 * if (!codec)
2735
 *     exit(1);
2736
 *
2737
 * context = avcodec_alloc_context();
2738
 *
2739
 * if (avcodec_open(context, codec) < 0)
2740
 *     exit(1);
2741
 * @endcode
2742
 *
2743
 * @param avctx The context which will be set up to use the given codec.
2744
 * @param codec The codec to use within the context.
2745
 * @return zero on success, a negative value on error
2746
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2747
 */
2748
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2749

    
2750
/**
2751
 * @deprecated Use avcodec_decode_audio2() instead.
2752
 */
2753
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2754
                         int *frame_size_ptr,
2755
                         uint8_t *buf, int buf_size);
2756

    
2757
/**
2758
 * Decodes an audio frame from \p buf into \p samples.
2759
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2760
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2761
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2762
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2763
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2764
 * decompressed frame size in \e bytes.
2765
 *
2766
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2767
 * output buffer before calling avcodec_decode_audio2().
2768
 *
2769
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2770
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2771
 * bits at once and could read over the end.
2772
 *
2773
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2774
 * no overreading happens for damaged MPEG streams.
2775
 *
2776
 * @note You might have to align the input buffer \p buf and output buffer \p
2777
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2778
 * necessary at all, on others it won't work at all if not aligned and on others
2779
 * it will work but it will have an impact on performance. In practice, the
2780
 * bitstream should have 4 byte alignment at minimum and all sample data should
2781
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2782
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2783
 * start of the buffer to 16.
2784
 *
2785
 * @param avctx the codec context
2786
 * @param[out] samples the output buffer
2787
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2788
 * @param[in] buf the input buffer
2789
 * @param[in] buf_size the input buffer size in bytes
2790
 * @return On error a negative value is returned, otherwise the number of bytes
2791
 * used or zero if no frame could be decompressed.
2792
 */
2793
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2794
                         int *frame_size_ptr,
2795
                         uint8_t *buf, int buf_size);
2796

    
2797
/**
2798
 * Decodes a video frame from \p buf into \p picture.
2799
 * The avcodec_decode_video() function decodes a video frame from the input
2800
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2801
 * video codec which was coupled with \p avctx using avcodec_open(). The
2802
 * resulting decoded frame is stored in \p picture.
2803
 *
2804
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2805
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2806
 * bits at once and could read over the end.
2807
 *
2808
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2809
 * no overreading happens for damaged MPEG streams.
2810
 *
2811
 * @note You might have to align the input buffer \p buf and output buffer \p
2812
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2813
 * necessary at all, on others it won't work at all if not aligned and on others
2814
 * it will work but it will have an impact on performance. In practice, the
2815
 * bitstream should have 4 byte alignment at minimum and all sample data should
2816
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2817
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2818
 * start of the buffer to 16.
2819
 *
2820
 * @param avctx the codec context
2821
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2822
 * @param[in] buf the input buffer
2823
 * @param[in] buf_size the size of the input buffer in bytes
2824
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2825
 * @return On error a negative value is returned, otherwise the number of bytes
2826
 * used or zero if no frame could be decompressed.
2827
 */
2828
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2829
                         int *got_picture_ptr,
2830
                         uint8_t *buf, int buf_size);
2831

    
2832
/* Decode a subtitle message. Return -1 if error, otherwise return the
2833
 * number of bytes used. If no subtitle could be decompressed,
2834
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2835
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2836
                            int *got_sub_ptr,
2837
                            const uint8_t *buf, int buf_size);
2838
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2839
                        int *data_size_ptr,
2840
                        uint8_t *buf, int buf_size);
2841

    
2842
/**
2843
 * Encodes an audio frame from \p samples into \p buf.
2844
 * The avcodec_encode_audio() function encodes an audio frame from the input
2845
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2846
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2847
 * stored in output buffer \p buf.
2848
 *
2849
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2850
 *
2851
 * @param avctx the codec context
2852
 * @param[out] buf the output buffer
2853
 * @param[in] buf_size the output buffer size
2854
 * @param[in] samples the input buffer containing the samples
2855
 * @return On error a negative value is returned, on succes zero or the number
2856
 * of bytes used from the input buffer.
2857
 */
2858
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2859
                         const short *samples);
2860

    
2861
/**
2862
 * Encodes a video frame from \p pict into \p buf.
2863
 * The avcodec_encode_video() function encodes a video frame from the input
2864
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2865
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2866
 * frame are stored in the output buffer \p buf. The input picture should be
2867
 * stored using a specific format, namely \c avctx.pix_fmt.
2868
 *
2869
 * @param avctx the codec context
2870
 * @param[out] buf the output buffer for the bitstream of encoded frame
2871
 * @param[in] buf_size the size of the output buffer in bytes
2872
 * @param[in] pict the input picture to encode
2873
 * @return On error a negative value is returned, on success zero or the number
2874
 * of bytes used from the input buffer.
2875
 */
2876
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2877
                         const AVFrame *pict);
2878
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2879
                            const AVSubtitle *sub);
2880

    
2881
int avcodec_close(AVCodecContext *avctx);
2882

    
2883
void avcodec_register_all(void);
2884

    
2885
/**
2886
 * Flush buffers, should be called when seeking or when switching to a different stream.
2887
 */
2888
void avcodec_flush_buffers(AVCodecContext *avctx);
2889

    
2890
void avcodec_default_free_buffers(AVCodecContext *s);
2891

    
2892
/* misc useful functions */
2893

    
2894
/**
2895
 * Returns a single letter to describe the given picture type \p pict_type.
2896
 *
2897
 * @param[in] pict_type the picture type
2898
 * @return A single character representing the picture type.
2899
 */
2900
char av_get_pict_type_char(int pict_type);
2901

    
2902
/**
2903
 * Returns codec bits per sample.
2904
 *
2905
 * @param[in] codec_id the codec
2906
 * @return Number of bits per sample or zero if unknown for the given codec.
2907
 */
2908
int av_get_bits_per_sample(enum CodecID codec_id);
2909

    
2910
/* frame parsing */
2911
typedef struct AVCodecParserContext {
2912
    void *priv_data;
2913
    struct AVCodecParser *parser;
2914
    int64_t frame_offset; /* offset of the current frame */
2915
    int64_t cur_offset; /* current offset
2916
                           (incremented by each av_parser_parse()) */
2917
    int64_t last_frame_offset; /* offset of the last frame */
2918
    /* video info */
2919
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2920
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2921
    int64_t pts;     /* pts of the current frame */
2922
    int64_t dts;     /* dts of the current frame */
2923

    
2924
    /* private data */
2925
    int64_t last_pts;
2926
    int64_t last_dts;
2927
    int fetch_timestamp;
2928

    
2929
#define AV_PARSER_PTS_NB 4
2930
    int cur_frame_start_index;
2931
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2932
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2933
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2934

    
2935
    int flags;
2936
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2937
} AVCodecParserContext;
2938

    
2939
typedef struct AVCodecParser {
2940
    int codec_ids[5]; /* several codec IDs are permitted */
2941
    int priv_data_size;
2942
    int (*parser_init)(AVCodecParserContext *s);
2943
    int (*parser_parse)(AVCodecParserContext *s,
2944
                        AVCodecContext *avctx,
2945
                        uint8_t **poutbuf, int *poutbuf_size,
2946
                        const uint8_t *buf, int buf_size);
2947
    void (*parser_close)(AVCodecParserContext *s);
2948
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2949
    struct AVCodecParser *next;
2950
} AVCodecParser;
2951

    
2952
extern AVCodecParser *av_first_parser;
2953

    
2954
void av_register_codec_parser(AVCodecParser *parser);
2955
AVCodecParserContext *av_parser_init(int codec_id);
2956
int av_parser_parse(AVCodecParserContext *s,
2957
                    AVCodecContext *avctx,
2958
                    uint8_t **poutbuf, int *poutbuf_size,
2959
                    const uint8_t *buf, int buf_size,
2960
                    int64_t pts, int64_t dts);
2961
int av_parser_change(AVCodecParserContext *s,
2962
                     AVCodecContext *avctx,
2963
                     uint8_t **poutbuf, int *poutbuf_size,
2964
                     const uint8_t *buf, int buf_size, int keyframe);
2965
void av_parser_close(AVCodecParserContext *s);
2966

    
2967
extern AVCodecParser aac_parser;
2968
extern AVCodecParser ac3_parser;
2969
extern AVCodecParser cavsvideo_parser;
2970
extern AVCodecParser dca_parser;
2971
extern AVCodecParser dvbsub_parser;
2972
extern AVCodecParser dvdsub_parser;
2973
extern AVCodecParser h261_parser;
2974
extern AVCodecParser h263_parser;
2975
extern AVCodecParser h264_parser;
2976
extern AVCodecParser mjpeg_parser;
2977
extern AVCodecParser mpeg4video_parser;
2978
extern AVCodecParser mpegaudio_parser;
2979
extern AVCodecParser mpegvideo_parser;
2980
extern AVCodecParser pnm_parser;
2981
extern AVCodecParser vc1_parser;
2982

    
2983

    
2984
typedef struct AVBitStreamFilterContext {
2985
    void *priv_data;
2986
    struct AVBitStreamFilter *filter;
2987
    AVCodecParserContext *parser;
2988
    struct AVBitStreamFilterContext *next;
2989
} AVBitStreamFilterContext;
2990

    
2991

    
2992
typedef struct AVBitStreamFilter {
2993
    const char *name;
2994
    int priv_data_size;
2995
    int (*filter)(AVBitStreamFilterContext *bsfc,
2996
                  AVCodecContext *avctx, const char *args,
2997
                  uint8_t **poutbuf, int *poutbuf_size,
2998
                  const uint8_t *buf, int buf_size, int keyframe);
2999
    struct AVBitStreamFilter *next;
3000
} AVBitStreamFilter;
3001

    
3002
extern AVBitStreamFilter *av_first_bitstream_filter;
3003

    
3004
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3005
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3006
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3007
                               AVCodecContext *avctx, const char *args,
3008
                               uint8_t **poutbuf, int *poutbuf_size,
3009
                               const uint8_t *buf, int buf_size, int keyframe);
3010
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
3011

    
3012
extern AVBitStreamFilter dump_extradata_bsf;
3013
extern AVBitStreamFilter remove_extradata_bsf;
3014
extern AVBitStreamFilter noise_bsf;
3015
extern AVBitStreamFilter mp3_header_compress_bsf;
3016
extern AVBitStreamFilter mp3_header_decompress_bsf;
3017
extern AVBitStreamFilter mjpega_dump_header_bsf;
3018
extern AVBitStreamFilter imx_dump_header_bsf;
3019

    
3020

    
3021
/* memory */
3022

    
3023
/**
3024
 * Reallocates the given block if it is not large enough, otherwise it
3025
 * does nothing.
3026
 *
3027
 * @see av_realloc
3028
 */
3029
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3030

    
3031
/* for static data only */
3032

    
3033
/**
3034
 * Frees all static arrays and resets their pointers to 0.
3035
 * Call this function to release all statically allocated tables.
3036
 */
3037
attribute_deprecated void av_free_static(void);
3038

    
3039
/**
3040
 * Allocation of static arrays.
3041
 *
3042
 * @warning Do not use for normal allocation.
3043
 *
3044
 * @param[in] size The amount of memory you need in bytes.
3045
 * @return block of memory of the requested size
3046
 */
3047
attribute_deprecated void *av_mallocz_static(unsigned int size);
3048

    
3049
/**
3050
 * Copy image 'src' to 'dst'.
3051
 */
3052
void av_picture_copy(AVPicture *dst, const AVPicture *src,
3053
              int pix_fmt, int width, int height);
3054

    
3055
/**
3056
 * Crop image top and left side.
3057
 */
3058
int av_picture_crop(AVPicture *dst, const AVPicture *src,
3059
             int pix_fmt, int top_band, int left_band);
3060

    
3061
/**
3062
 * Pad image.
3063
 */
3064
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3065
            int padtop, int padbottom, int padleft, int padright, int *color);
3066

    
3067
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
3068
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
3069
              int pix_fmt, int width, int height);
3070

    
3071
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
3072
             int pix_fmt, int top_band, int left_band);
3073

    
3074
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3075
            int padtop, int padbottom, int padleft, int padright, int *color);
3076
#endif
3077

    
3078
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3079

    
3080
/* error handling */
3081
#if EINVAL > 0
3082
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3083
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3084
#else
3085
/* Some platforms have E* and errno already negated. */
3086
#define AVERROR(e) (e)
3087
#define AVUNERROR(e) (e)
3088
#endif
3089
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3090
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3091
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3092
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3093
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3094
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3095
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3096

    
3097
#ifdef __cplusplus
3098
}
3099
#endif
3100

    
3101
#endif /* AVCODEC_H */