Removed custom FFmpegLock. Removed ffmpeg headers from third_party/ffmpeg/include.

third_party/ffmpeg/include/libavcodec/avcodec.h

-/*
- * copyright (c) 2001 Fabrice Bellard
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVCODEC_AVCODEC_H
-#define AVCODEC_AVCODEC_H
-
-/**
- * @file libavcodec/avcodec.h
- * external API header
- */
-
-#include <errno.h>
-#include "libavutil/avutil.h"
-
-#define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 28
-#define LIBAVCODEC_VERSION_MICRO  0
-
-#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
-                                               LIBAVCODEC_VERSION_MINOR, \
-                                               LIBAVCODEC_VERSION_MICRO)
-#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
-                                           LIBAVCODEC_VERSION_MINOR,    \
-                                           LIBAVCODEC_VERSION_MICRO)
-#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
-
-#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
-
-#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
-#define AV_TIME_BASE            1000000
-#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
-
-/**
- * Identifies the syntax and semantics of the bitstream.
- * The principle is roughly:
- * Two decoders with the same ID can decode the same streams.
- * Two encoders with the same ID can encode compatible streams.
- * There may be slight deviations from the principle due to implementation
- * details.
- *
- * If you add a codec ID to this list, add it so that
- * 1. no value of a existing codec ID changes (that would break ABI),
- * 2. it is as close as possible to similar codecs.
- */
-enum CodecID {
-    CODEC_ID_NONE,
-
-    /* video codecs */
-    CODEC_ID_MPEG1VIDEO,
-    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
-    CODEC_ID_MPEG2VIDEO_XVMC,
-    CODEC_ID_H261,
-    CODEC_ID_H263,
-    CODEC_ID_RV10,
-    CODEC_ID_RV20,
-    CODEC_ID_MJPEG,
-    CODEC_ID_MJPEGB,
-    CODEC_ID_LJPEG,
-    CODEC_ID_SP5X,
-    CODEC_ID_JPEGLS,
-    CODEC_ID_MPEG4,
-    CODEC_ID_RAWVIDEO,
-    CODEC_ID_MSMPEG4V1,
-    CODEC_ID_MSMPEG4V2,
-    CODEC_ID_MSMPEG4V3,
-    CODEC_ID_WMV1,
-    CODEC_ID_WMV2,
-    CODEC_ID_H263P,
-    CODEC_ID_H263I,
-    CODEC_ID_FLV1,
-    CODEC_ID_SVQ1,
-    CODEC_ID_SVQ3,
-    CODEC_ID_DVVIDEO,
-    CODEC_ID_HUFFYUV,
-    CODEC_ID_CYUV,
-    CODEC_ID_H264,
-    CODEC_ID_INDEO3,
-    CODEC_ID_VP3,
-    CODEC_ID_THEORA,
-    CODEC_ID_ASV1,
-    CODEC_ID_ASV2,
-    CODEC_ID_FFV1,
-    CODEC_ID_4XM,
-    CODEC_ID_VCR1,
-    CODEC_ID_CLJR,
-    CODEC_ID_MDEC,
-    CODEC_ID_ROQ,
-    CODEC_ID_INTERPLAY_VIDEO,
-    CODEC_ID_XAN_WC3,
-    CODEC_ID_XAN_WC4,
-    CODEC_ID_RPZA,
-    CODEC_ID_CINEPAK,
-    CODEC_ID_WS_VQA,
-    CODEC_ID_MSRLE,
-    CODEC_ID_MSVIDEO1,
-    CODEC_ID_IDCIN,
-    CODEC_ID_8BPS,
-    CODEC_ID_SMC,
-    CODEC_ID_FLIC,
-    CODEC_ID_TRUEMOTION1,
-    CODEC_ID_VMDVIDEO,
-    CODEC_ID_MSZH,
-    CODEC_ID_ZLIB,
-    CODEC_ID_QTRLE,
-    CODEC_ID_SNOW,
-    CODEC_ID_TSCC,
-    CODEC_ID_ULTI,
-    CODEC_ID_QDRAW,
-    CODEC_ID_VIXL,
-    CODEC_ID_QPEG,
-    CODEC_ID_XVID,
-    CODEC_ID_PNG,
-    CODEC_ID_PPM,
-    CODEC_ID_PBM,
-    CODEC_ID_PGM,
-    CODEC_ID_PGMYUV,
-    CODEC_ID_PAM,
-    CODEC_ID_FFVHUFF,
-    CODEC_ID_RV30,
-    CODEC_ID_RV40,
-    CODEC_ID_VC1,
-    CODEC_ID_WMV3,
-    CODEC_ID_LOCO,
-    CODEC_ID_WNV1,
-    CODEC_ID_AASC,
-    CODEC_ID_INDEO2,
-    CODEC_ID_FRAPS,
-    CODEC_ID_TRUEMOTION2,
-    CODEC_ID_BMP,
-    CODEC_ID_CSCD,
-    CODEC_ID_MMVIDEO,
-    CODEC_ID_ZMBV,
-    CODEC_ID_AVS,
-    CODEC_ID_SMACKVIDEO,
-    CODEC_ID_NUV,
-    CODEC_ID_KMVC,
-    CODEC_ID_FLASHSV,
-    CODEC_ID_CAVS,
-    CODEC_ID_JPEG2000,
-    CODEC_ID_VMNC,
-    CODEC_ID_VP5,
-    CODEC_ID_VP6,
-    CODEC_ID_VP6F,
-    CODEC_ID_TARGA,
-    CODEC_ID_DSICINVIDEO,
-    CODEC_ID_TIERTEXSEQVIDEO,
-    CODEC_ID_TIFF,
-    CODEC_ID_GIF,
-    CODEC_ID_FFH264,
-    CODEC_ID_DXA,
-    CODEC_ID_DNXHD,
-    CODEC_ID_THP,
-    CODEC_ID_SGI,
-    CODEC_ID_C93,
-    CODEC_ID_BETHSOFTVID,
-    CODEC_ID_PTX,
-    CODEC_ID_TXD,
-    CODEC_ID_VP6A,
-    CODEC_ID_AMV,
-    CODEC_ID_VB,
-    CODEC_ID_PCX,
-    CODEC_ID_SUNRAST,
-    CODEC_ID_INDEO4,
-    CODEC_ID_INDEO5,
-    CODEC_ID_MIMIC,
-    CODEC_ID_RL2,
-    CODEC_ID_8SVX_EXP,
-    CODEC_ID_8SVX_FIB,
-    CODEC_ID_ESCAPE124,
-    CODEC_ID_DIRAC,
-    CODEC_ID_BFI,
-    CODEC_ID_CMV,
-    CODEC_ID_MOTIONPIXELS,
-    CODEC_ID_TGV,
-    CODEC_ID_TGQ,
-    CODEC_ID_TQI,
-    CODEC_ID_AURA,
-    CODEC_ID_AURA2,
-    CODEC_ID_V210X,
-    CODEC_ID_TMV,
-
-    /* various PCM "codecs" */
-    CODEC_ID_PCM_S16LE= 0x10000,
-    CODEC_ID_PCM_S16BE,
-    CODEC_ID_PCM_U16LE,
-    CODEC_ID_PCM_U16BE,
-    CODEC_ID_PCM_S8,
-    CODEC_ID_PCM_U8,
-    CODEC_ID_PCM_MULAW,
-    CODEC_ID_PCM_ALAW,
-    CODEC_ID_PCM_S32LE,
-    CODEC_ID_PCM_S32BE,
-    CODEC_ID_PCM_U32LE,
-    CODEC_ID_PCM_U32BE,
-    CODEC_ID_PCM_S24LE,
-    CODEC_ID_PCM_S24BE,
-    CODEC_ID_PCM_U24LE,
-    CODEC_ID_PCM_U24BE,
-    CODEC_ID_PCM_S24DAUD,
-    CODEC_ID_PCM_ZORK,
-    CODEC_ID_PCM_S16LE_PLANAR,
-    CODEC_ID_PCM_DVD,
-    CODEC_ID_PCM_F32BE,
-    CODEC_ID_PCM_F32LE,
-    CODEC_ID_PCM_F64BE,
-    CODEC_ID_PCM_F64LE,
-
-    /* various ADPCM codecs */
-    CODEC_ID_ADPCM_IMA_QT= 0x11000,
-    CODEC_ID_ADPCM_IMA_WAV,
-    CODEC_ID_ADPCM_IMA_DK3,
-    CODEC_ID_ADPCM_IMA_DK4,
-    CODEC_ID_ADPCM_IMA_WS,
-    CODEC_ID_ADPCM_IMA_SMJPEG,
-    CODEC_ID_ADPCM_MS,
-    CODEC_ID_ADPCM_4XM,
-    CODEC_ID_ADPCM_XA,
-    CODEC_ID_ADPCM_ADX,
-    CODEC_ID_ADPCM_EA,
-    CODEC_ID_ADPCM_G726,
-    CODEC_ID_ADPCM_CT,
-    CODEC_ID_ADPCM_SWF,
-    CODEC_ID_ADPCM_YAMAHA,
-    CODEC_ID_ADPCM_SBPRO_4,
-    CODEC_ID_ADPCM_SBPRO_3,
-    CODEC_ID_ADPCM_SBPRO_2,
-    CODEC_ID_ADPCM_THP,
-    CODEC_ID_ADPCM_IMA_AMV,
-    CODEC_ID_ADPCM_EA_R1,
-    CODEC_ID_ADPCM_EA_R3,
-    CODEC_ID_ADPCM_EA_R2,
-    CODEC_ID_ADPCM_IMA_EA_SEAD,
-    CODEC_ID_ADPCM_IMA_EA_EACS,
-    CODEC_ID_ADPCM_EA_XAS,
-    CODEC_ID_ADPCM_EA_MAXIS_XA,
-    CODEC_ID_ADPCM_IMA_ISS,
-
-    /* AMR */
-    CODEC_ID_AMR_NB= 0x12000,
-    CODEC_ID_AMR_WB,
-
-    /* RealAudio codecs*/
-    CODEC_ID_RA_144= 0x13000,
-    CODEC_ID_RA_288,
-
-    /* various DPCM codecs */
-    CODEC_ID_ROQ_DPCM= 0x14000,
-    CODEC_ID_INTERPLAY_DPCM,
-    CODEC_ID_XAN_DPCM,
-    CODEC_ID_SOL_DPCM,
-
-    /* audio codecs */
-    CODEC_ID_MP2= 0x15000,
-    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
-    CODEC_ID_AAC,
-    CODEC_ID_AC3,
-    CODEC_ID_DTS,
-    CODEC_ID_VORBIS,
-    CODEC_ID_DVAUDIO,
-    CODEC_ID_WMAV1,
-    CODEC_ID_WMAV2,
-    CODEC_ID_MACE3,
-    CODEC_ID_MACE6,
-    CODEC_ID_VMDAUDIO,
-    CODEC_ID_SONIC,
-    CODEC_ID_SONIC_LS,
-    CODEC_ID_FLAC,
-    CODEC_ID_MP3ADU,
-    CODEC_ID_MP3ON4,
-    CODEC_ID_SHORTEN,
-    CODEC_ID_ALAC,
-    CODEC_ID_WESTWOOD_SND1,
-    CODEC_ID_GSM, ///< as in Berlin toast format
-    CODEC_ID_QDM2,
-    CODEC_ID_COOK,
-    CODEC_ID_TRUESPEECH,
-    CODEC_ID_TTA,
-    CODEC_ID_SMACKAUDIO,
-    CODEC_ID_QCELP,
-    CODEC_ID_WAVPACK,
-    CODEC_ID_DSICINAUDIO,
-    CODEC_ID_IMC,
-    CODEC_ID_MUSEPACK7,
-    CODEC_ID_MLP,
-    CODEC_ID_GSM_MS, /* as found in WAV */
-    CODEC_ID_ATRAC3,
-    CODEC_ID_VOXWARE,
-    CODEC_ID_APE,
-    CODEC_ID_NELLYMOSER,
-    CODEC_ID_MUSEPACK8,
-    CODEC_ID_SPEEX,
-    CODEC_ID_WMAVOICE,
-    CODEC_ID_WMAPRO,
-    CODEC_ID_WMALOSSLESS,
-    CODEC_ID_ATRAC3P,
-    CODEC_ID_EAC3,
-    CODEC_ID_SIPR,
-    CODEC_ID_MP1,
-    CODEC_ID_TWINVQ,
-    CODEC_ID_TRUEHD,
-    CODEC_ID_MP4ALS,
-
-    /* subtitle codecs */
-    CODEC_ID_DVD_SUBTITLE= 0x17000,
-    CODEC_ID_DVB_SUBTITLE,
-    CODEC_ID_TEXT,  ///< raw UTF-8 text
-    CODEC_ID_XSUB,
-    CODEC_ID_SSA,
-    CODEC_ID_MOV_TEXT,
-
-    /* other specific kind of codecs (generally used for attachments) */
-    CODEC_ID_TTF= 0x18000,
-
-    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
-
-    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
-                                * stream (only used by libavformat) */
-};
-
-enum CodecType {
-    CODEC_TYPE_UNKNOWN = -1,
-    CODEC_TYPE_VIDEO,
-    CODEC_TYPE_AUDIO,
-    CODEC_TYPE_DATA,
-    CODEC_TYPE_SUBTITLE,
-    CODEC_TYPE_ATTACHMENT,
-    CODEC_TYPE_NB
-};
-
-/**
- * all in native-endian format
- */
-enum SampleFormat {
-    SAMPLE_FMT_NONE = -1,
-    SAMPLE_FMT_U8,              ///< unsigned 8 bits
-    SAMPLE_FMT_S16,             ///< signed 16 bits
-    SAMPLE_FMT_S32,             ///< signed 32 bits
-    SAMPLE_FMT_FLT,             ///< float
-    SAMPLE_FMT_DBL,             ///< double
-    SAMPLE_FMT_NB               ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
-};
-
-/* Audio channel masks */
-#define CH_FRONT_LEFT             0x00000001
-#define CH_FRONT_RIGHT            0x00000002
-#define CH_FRONT_CENTER           0x00000004
-#define CH_LOW_FREQUENCY          0x00000008
-#define CH_BACK_LEFT              0x00000010
-#define CH_BACK_RIGHT             0x00000020
-#define CH_FRONT_LEFT_OF_CENTER   0x00000040
-#define CH_FRONT_RIGHT_OF_CENTER  0x00000080
-#define CH_BACK_CENTER            0x00000100
-#define CH_SIDE_LEFT              0x00000200
-#define CH_SIDE_RIGHT             0x00000400
-#define CH_TOP_CENTER             0x00000800
-#define CH_TOP_FRONT_LEFT         0x00001000
-#define CH_TOP_FRONT_CENTER       0x00002000
-#define CH_TOP_FRONT_RIGHT        0x00004000
-#define CH_TOP_BACK_LEFT          0x00008000
-#define CH_TOP_BACK_CENTER        0x00010000
-#define CH_TOP_BACK_RIGHT         0x00020000
-#define CH_STEREO_LEFT            0x20000000  ///< Stereo downmix.
-#define CH_STEREO_RIGHT           0x40000000  ///< See CH_STEREO_LEFT.
-
-/* Audio channel convenience macros */
-#define CH_LAYOUT_MONO              (CH_FRONT_CENTER)
-#define CH_LAYOUT_STEREO            (CH_FRONT_LEFT|CH_FRONT_RIGHT)
-#define CH_LAYOUT_2_1               (CH_LAYOUT_STEREO|CH_BACK_CENTER)
-#define CH_LAYOUT_SURROUND          (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
-#define CH_LAYOUT_4POINT0           (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
-#define CH_LAYOUT_2_2               (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
-#define CH_LAYOUT_QUAD              (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
-#define CH_LAYOUT_5POINT0           (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
-#define CH_LAYOUT_5POINT1           (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
-#define CH_LAYOUT_5POINT0_BACK      (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
-#define CH_LAYOUT_5POINT1_BACK      (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
-#define CH_LAYOUT_7POINT1           (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
-#define CH_LAYOUT_7POINT1_WIDE      (CH_LAYOUT_5POINT1_BACK|\
-                                          CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
-#define CH_LAYOUT_STEREO_DOWNMIX    (CH_STEREO_LEFT|CH_STEREO_RIGHT)
-
-/* in bytes */
-#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
-
-/**
- * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
- * This is mainly needed because some optimized bitstream readers read
- * 32 or 64 bit at once and could read over the end.<br>
- * Note: If the first 23 bits of the additional bytes are not 0, then damaged
- * MPEG bitstreams could cause overread and segfault.
- */
-#define FF_INPUT_BUFFER_PADDING_SIZE 8
-
-/**
- * minimum encoding buffer size
- * Used to avoid some checks during header writing.
- */
-#define FF_MIN_BUFFER_SIZE 16384
-
-
-/**
- * motion estimation type.
- */
-enum Motion_Est_ID {
-    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
-    ME_FULL,
-    ME_LOG,
-    ME_PHODS,
-    ME_EPZS,        ///< enhanced predictive zonal search
-    ME_X1,          ///< reserved for experiments
-    ME_HEX,         ///< hexagon based search
-    ME_UMH,         ///< uneven multi-hexagon search
-    ME_ITER,        ///< iterative search
-    ME_TESA,        ///< transformed exhaustive search algorithm
-};
-
-enum AVDiscard{
-    /* We leave some space between them for extensions (drop some
-     * keyframes for intra-only or drop just some bidir frames). */
-    AVDISCARD_NONE   =-16, ///< discard nothing
-    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
-    AVDISCARD_NONREF =  8, ///< discard all non reference
-    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
-    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
-    AVDISCARD_ALL    = 48, ///< discard all
-};
-
-enum AVColorPrimaries{
-    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
-    AVCOL_PRI_UNSPECIFIED=2,
-    AVCOL_PRI_BT470M     =4,
-    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
-    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
-    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
-    AVCOL_PRI_FILM       =8,
-    AVCOL_PRI_NB           , ///< Not part of ABI
-};
-
-enum AVColorTransferCharacteristic{
-    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
-    AVCOL_TRC_UNSPECIFIED=2,
-    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
-    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
-    AVCOL_TRC_NB           , ///< Not part of ABI
-};
-
-enum AVColorSpace{
-    AVCOL_SPC_RGB        =0,
-    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
-    AVCOL_SPC_UNSPECIFIED=2,
-    AVCOL_SPC_FCC        =4,
-    AVCOL_SPC_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
-    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
-    AVCOL_SPC_SMPTE240M  =7,
-    AVCOL_SPC_NB           , ///< Not part of ABI
-};
-
-enum AVColorRange{
-    AVCOL_RANGE_UNSPECIFIED=0,
-    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
-    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
-    AVCOL_RANGE_NB           , ///< Not part of ABI
-};
-
-typedef struct RcOverride{
-    int start_frame;
-    int end_frame;
-    int qscale; // If this is 0 then quality_factor will be used instead.
-    float quality_factor;
-} RcOverride;
-
-#define FF_MAX_B_FRAMES 16
-
-/* encoding support
-   These flags can be passed in AVCodecContext.flags before initialization.
-   Note: Not everything is supported yet.
-*/
-
-#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
-#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
-#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
-#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
-#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
-#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
-/**
- * The parent program guarantees that the input for B-frames containing
- * streams is not written to for at least s->max_b_frames+1 frames, if
- * this is not set the input will be copied.
- */
-#define CODEC_FLAG_INPUT_PRESERVED 0x0100
-#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
-#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
-#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
-#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
-#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
-#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
-#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
-                                                  location instead of only at frame boundaries. */
-#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
-#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
-#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
-#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
-#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
-#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
-/* Fx : Flag for h263+ extra options */
-#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
-#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
-#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
-#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
-#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
-#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
-#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
-#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
-#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
-#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
-#define CODEC_FLAG_CLOSED_GOP     0x80000000
-#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
-#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
-#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
-#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
-#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
-#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
-#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
-#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
-#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
-#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
-#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
-#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
-#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
-#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
-#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
-#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
-#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
-#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
-
-/* Unsupported options :
- *              Syntax Arithmetic coding (SAC)
- *              Reference Picture Selection
- *              Independent Segment Decoding */
-/* /Fx */
-/* codec capabilities */
-
-#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
-/**
- * Codec uses get_buffer() for allocating buffers.
- * direct rendering method 1
- */
-#define CODEC_CAP_DR1             0x0002
-/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
-#define CODEC_CAP_PARSE_ONLY      0x0004
-#define CODEC_CAP_TRUNCATED       0x0008
-/* Codec can export data for HW decoding (XvMC). */
-#define CODEC_CAP_HWACCEL         0x0010
-/**
- * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
- * If this is not set, the codec is guaranteed to never be fed with NULL data.
- */
-#define CODEC_CAP_DELAY           0x0020
-/**
- * Codec can be fed a final frame with a smaller size.
- * This can be used to prevent truncation of the last audio samples.
- */
-#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
-/**
- * Codec can export data for HW decoding (VDPAU).
- */
-#define CODEC_CAP_HWACCEL_VDPAU    0x0080
-/**
- * Codec supports frame-based multithreading.
- */
-#define CODEC_CAP_FRAME_THREADS    0x0100
-
-//The following defines may change, don't expect compatibility if you use them.
-#define MB_TYPE_INTRA4x4   0x0001
-#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
-#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
-#define MB_TYPE_16x16      0x0008
-#define MB_TYPE_16x8       0x0010
-#define MB_TYPE_8x16       0x0020
-#define MB_TYPE_8x8        0x0040
-#define MB_TYPE_INTERLACED 0x0080
-#define MB_TYPE_DIRECT2    0x0100 //FIXME
-#define MB_TYPE_ACPRED     0x0200
-#define MB_TYPE_GMC        0x0400
-#define MB_TYPE_SKIP       0x0800
-#define MB_TYPE_P0L0       0x1000
-#define MB_TYPE_P1L0       0x2000
-#define MB_TYPE_P0L1       0x4000
-#define MB_TYPE_P1L1       0x8000
-#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
-#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
-#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
-#define MB_TYPE_QUANT      0x00010000
-#define MB_TYPE_CBP        0x00020000
-//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
-
-/**
- * Pan Scan area.
- * This specifies the area which should be displayed.
- * Note there may be multiple such areas for one frame.
- */
-typedef struct AVPanScan{
-    /**
-     * id
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    int id;
-
-    /**
-     * width and height in 1/16 pel
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    int width;
-    int height;
-
-    /**
-     * position of the top left corner in 1/16 pel for up to 3 fields/frames
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    int16_t position[3][2];
-}AVPanScan;
-
-#define FF_COMMON_FRAME \
-    /**\
-     * pointer to the picture planes.\
-     * This might be different from the first allocated byte\
-     * - encoding: \
-     * - decoding: \
-     */\
-    uint8_t *data[4];\
-    int linesize[4];\
-    /**\
-     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
-     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
-     * - encoding: \
-     * - decoding: \
-     */\
-    uint8_t *base[4];\
-    /**\
-     * 1 -> keyframe, 0-> not\
-     * - encoding: Set by libavcodec.\
-     * - decoding: Set by libavcodec.\
-     */\
-    int key_frame;\
-\
-    /**\
-     * Picture type of the frame, see ?_TYPE below.\
-     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
-     * - decoding: Set by libavcodec.\
-     */\
-    int pict_type;\
-\
-    /**\
-     * presentation timestamp in time_base units (time when frame should be shown to user)\
-     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
-     * - encoding: MUST be set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    int64_t pts;\
-\
-    /**\
-     * picture number in bitstream order\
-     * - encoding: set by\
-     * - decoding: Set by libavcodec.\
-     */\
-    int coded_picture_number;\
-    /**\
-     * picture number in display order\
-     * - encoding: set by\
-     * - decoding: Set by libavcodec.\
-     */\
-    int display_picture_number;\
-\
-    /**\
-     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
-     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
-     * - decoding: Set by libavcodec.\
-     */\
-    int quality; \
-\
-    /**\
-     * buffer age (1->was last buffer and dint change, 2->..., ...).\
-     * Set to INT_MAX if the buffer has not been used yet.\
-     * - encoding: unused\
-     * - decoding: MUST be set by get_buffer().\
-     */\
-    int age;\
-\
-    /**\
-     * is this picture used as reference\
-     * The values for this are the same as the MpegEncContext.picture_structure\
-     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
-     * Set to 4 for delayed, non-reference frames.\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec. (before get_buffer() call)).\
-     */\
-    int reference;\
-\
-    /**\
-     * QP table\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    int8_t *qscale_table;\
-    /**\
-     * QP store stride\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    int qstride;\
-\
-    /**\
-     * mbskip_table[mb]>=1 if MB didn't change\
-     * stride= mb_width = (width+15)>>4\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    uint8_t *mbskip_table;\
-\
-    /**\
-     * motion vector table\
-     * @code\
-     * example:\
-     * int mv_sample_log2= 4 - motion_subsample_log2;\
-     * int mb_width= (width+15)>>4;\
-     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
-     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
-     * @endcode\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    int16_t (*motion_val[2])[2];\
-\
-    /**\
-     * macroblock type table\
-     * mb_type_base + mb_width + 2\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    uint32_t *mb_type;\
-\
-    /**\
-     * log2 of the size of the block which a single vector in motion_val represents: \
-     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    uint8_t motion_subsample_log2;\
-\
-    /**\
-     * for some private data of the user\
-     * - encoding: unused\
-     * - decoding: Set by user.\
-     */\
-    void *opaque;\
-\
-    /**\
-     * error\
-     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
-     * - decoding: unused\
-     */\
-    uint64_t error[4];\
-\
-    /**\
-     * type of the buffer (to keep track of who has to deallocate data[*])\
-     * - encoding: Set by the one who allocates it.\
-     * - decoding: Set by the one who allocates it.\
-     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
-     */\
-    int type;\
-    \
-    /**\
-     * When decoding, this signals how much the picture must be delayed.\
-     * extra_delay = repeat_pict / (2*fps)\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    int repeat_pict;\
-    \
-    /**\
-     * \
-     */\
-    int qscale_type;\
-    \
-    /**\
-     * The content of the picture is interlaced.\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec. (default 0)\
-     */\
-    int interlaced_frame;\
-    \
-    /**\
-     * If the content is interlaced, is top field displayed first.\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    int top_field_first;\
-    \
-    /**\
-     * Pan scan.\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    AVPanScan *pan_scan;\
-    \
-    /**\
-     * Tell user application that palette has changed from previous frame.\
-     * - encoding: ??? (no palette-enabled encoder yet)\
-     * - decoding: Set by libavcodec. (default 0).\
-     */\
-    int palette_has_changed;\
-    \
-    /**\
-     * codec suggestion on buffer type if != 0\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec. (before get_buffer() call)).\
-     */\
-    int buffer_hints;\
-\
-    /**\
-     * DCT coefficients\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec.\
-     */\
-    short *dct_coeff;\
-\
-    /**\
-     * motion referece frame index\
-     * - encoding: Set by user.\
-     * - decoding: Set by libavcodec.\
-     */\
-    int8_t *ref_index[2];\
-\
-    /**\
-     * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
-     * output in AVFrame.reordered_opaque\
-     * - encoding: unused\
-     * - decoding: Read by user.\
-     */\
-    int64_t reordered_opaque;\
-\
-    /**\
-     * hardware accelerator private data (FFmpeg allocated)\
-     * - encoding: unused\
-     * - decoding: Set by libavcodec\
-     */\
-    void *hwaccel_picture_private;\
-\
-    /**\
-     * the AVCodecContext which ff_get_buffer was last called on\
-     * - encoding: Set by libavcodec.\
-     * - decoding: Set by libavcodec.\
-     */\
-    struct AVCodecContext *owner;\
-\
-    /**\
-     * used by multithreading to store frame-specific info\
-     * - encoding: Set by libavcodec.\
-     * - decoding: Set by libavcodec.\
-     */\
-    void *thread_opaque;
-
-#define FF_QSCALE_TYPE_MPEG1 0
-#define FF_QSCALE_TYPE_MPEG2 1
-#define FF_QSCALE_TYPE_H264  2
-
-#define FF_BUFFER_TYPE_INTERNAL 1
-#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
-#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
-#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
-
-
-#define FF_I_TYPE  1 ///< Intra
-#define FF_P_TYPE  2 ///< Predicted
-#define FF_B_TYPE  3 ///< Bi-dir predicted
-#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
-#define FF_SI_TYPE 5 ///< Switching Intra
-#define FF_SP_TYPE 6 ///< Switching Predicted
-#define FF_BI_TYPE 7
-
-#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
-#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
-#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
-#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
-
-typedef struct AVPacket {
-    /**
-     * Presentation timestamp in AVStream->time_base units; the time at which
-     * the decompressed packet will be presented to the user.
-     * Can be AV_NOPTS_VALUE if it is not stored in the file.
-     * pts MUST be larger or equal to dts as presentation cannot happen before
-     * decompression, unless one wants to view hex dumps. Some formats misuse
-     * the terms dts and pts/cts to mean something different. Such timestamps
-     * must be converted to true pts/dts before they are stored in AVPacket.
-     */
-    int64_t pts;
-    /**
-     * Decompression timestamp in AVStream->time_base units; the time at which
-     * the packet is decompressed.
-     * Can be AV_NOPTS_VALUE if it is not stored in the file.
-     */
-    int64_t dts;
-    uint8_t *data;
-    int   size;
-    int   stream_index;
-    int   flags;
-    /**
-     * Duration of this packet in AVStream->time_base units, 0 if unknown.
-     * Equals next_pts - this_pts in presentation order.
-     */
-    int   duration;
-    void  (*destruct)(struct AVPacket *);
-    void  *priv;
-    int64_t pos;                            ///< byte position in stream, -1 if unknown
-
-    /**
-     * Time difference in AVStream->time_base units from the pts of this
-     * packet to the point at which the output from the decoder has converged
-     * independent from the availability of previous frames. That is, the
-     * frames are virtually identical no matter if decoding started from
-     * the very first frame or from this keyframe.
-     * Is AV_NOPTS_VALUE if unknown.
-     * This field is not the display duration of the current packet.
-     *
-     * The purpose of this field is to allow seeking in streams that have no
-     * keyframes in the conventional sense. It corresponds to the
-     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
-     * essential for some types of subtitle streams to ensure that all
-     * subtitles are correctly displayed after seeking.
-     */
-    int64_t convergence_duration;
-} AVPacket;
-#define PKT_FLAG_KEY   0x0001
-
-/**
- * Audio Video Frame.
- * New fields can be added to the end of FF_COMMON_FRAME with minor version
- * bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump. No fields should be added into AVFrame before or after
- * FF_COMMON_FRAME!
- * sizeof(AVFrame) must not be used outside libav*.
- */
-typedef struct AVFrame {
-    FF_COMMON_FRAME
-} AVFrame;
-
-/**
- * main external API structure.
- * New fields can be added to the end with minor version bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump.
- * sizeof(AVCodecContext) must not be used outside libav*.
- */
-typedef struct AVCodecContext {
-    /**
-     * information on struct for av_log
-     * - set by avcodec_alloc_context
-     */
-    const AVClass *av_class;
-    /**
-     * the average bitrate
-     * - encoding: Set by user; unused for constant quantizer encoding.
-     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
-     */
-    int bit_rate;
-
-    /**
-     * number of bits the bitstream is allowed to diverge from the reference.
-     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
-     * - encoding: Set by user; unused for constant quantizer encoding.
-     * - decoding: unused
-     */
-    int bit_rate_tolerance;
-
-    /**
-     * CODEC_FLAG_*.
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int flags;
-
-    /**
-     * Some codecs need additional format info. It is stored here.
-     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
-     * specific codec MUST set it correctly otherwise stream copy breaks.
-     * In general use of this field by muxers is not recommanded.
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
-     */
-    int sub_id;
-
-    /**
-     * Motion estimation algorithm used for video coding.
-     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
-     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
-     * - encoding: MUST be set by user.
-     * - decoding: unused
-     */
-    int me_method;
-
-    /**
-     * some codecs need / can use extradata like Huffman tables.
-     * mjpeg: Huffman tables
-     * rv10: additional flags
-     * mpeg4: global headers (they can be in the bitstream or here)
-     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
-     * than extradata_size to avoid prolems if it is read with the bitstream reader.
-     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
-     * - encoding: Set/allocated/freed by libavcodec.
-     * - decoding: Set/allocated/freed by user.
-     */
-    uint8_t *extradata;
-    int extradata_size;
-
-    /**
-     * This is the fundamental unit of time (in seconds) in terms
-     * of which frame timestamps are represented. For fixed-fps content,
-     * timebase should be 1/framerate and timestamp increments should be
-     * identically 1.
-     * - encoding: MUST be set by user.
-     * - decoding: Set by libavcodec.
-     */
-    AVRational time_base;
-
-    /* video only */
-    /**
-     * picture width / height.
-     * - encoding: MUST be set by user.
-     * - decoding: Set by libavcodec.
-     * Note: For compatibility it is possible to set this instead of
-     * coded_width/height before decoding.
-     */
-    int width, height;
-
-#define FF_ASPECT_EXTENDED 15
-
-    /**
-     * the number of pictures in a group of pictures, or 0 for intra_only
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int gop_size;
-
-    /**
-     * Pixel format, see PIX_FMT_xxx.
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    enum PixelFormat pix_fmt;
-
-    /**
-     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
-     * has to read frames at native frame rate.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rate_emu;
-
-    /**
-     * If non NULL, 'draw_horiz_band' is called by the libavcodec
-     * decoder to draw a horizontal band. It improves cache usage. Not
-     * all codecs can do that. You must check the codec capabilities
-     * beforehand. May be called by different threads at the same time.
-     * The function is also used by hardware acceleration APIs.
-     * It is called at least once during frame decoding to pass
-     * the data needed for hardware render.
-     * In that mode instead of pixel data, AVFrame points to
-     * a structure specific to the acceleration API. The application
-     * reads the structure and can change some fields to indicate progress
-     * or mark state.
-     * - encoding: unused
-     * - decoding: Set by user.
-     * @param height the height of the slice
-     * @param y the y position of the slice
-     * @param type 1->top field, 2->bottom field, 3->frame
-     * @param offset offset into the AVFrame.data from which the slice should be read
-     */
-    void (*draw_horiz_band)(struct AVCodecContext *s,
-                            const AVFrame *src, int offset[4],
-                            int y, int type, int height);
-
-    /* audio only */
-    int sample_rate; ///< samples per second
-    int channels;    ///< number of audio channels
-
-    /**
-     * audio sample format
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    enum SampleFormat sample_fmt;  ///< sample format, currently unused
-
-    /* The following data should not be initialized. */
-    /**
-     * Samples per packet, initialized when calling 'init'.
-     */
-    int frame_size;
-    int frame_number;   ///< Number of audio or video frames returned so far
-    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
-
-    /**
-     * Number of frames the decoded output will be delayed relative to
-     * the encoded input.
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    int delay;
-
-    /* - encoding parameters */
-    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
-    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
-
-    /**
-     * minimum quantizer
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int qmin;
-
-    /**
-     * maximum quantizer
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int qmax;
-
-    /**
-     * maximum quantizer difference between frames
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int max_qdiff;
-
-    /**
-     * maximum number of B-frames between non-B-frames
-     * Note: The output will be delayed by max_b_frames+1 relative to the input.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int max_b_frames;
-
-    /**
-     * qscale factor between IP and B-frames
-     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
-     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float b_quant_factor;
-
-    /** obsolete FIXME remove */
-    int rc_strategy;
-#define FF_RC_STRATEGY_XVID 1
-
-    int b_frame_strategy;
-
-    /**
-     * hurry up amount
-     * - encoding: unused
-     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
-     * @deprecated Deprecated in favor of skip_idct and skip_frame.
-     */
-    int hurry_up;
-
-    struct AVCodec *codec;
-
-    void *priv_data;
-
-    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
-                            /* do its best to deliver a chunk with size     */
-                            /* below rtp_payload_size, the chunk will start */
-                            /* with a start code on some codecs like H.263. */
-                            /* This doesn't take account of any particular  */
-                            /* headers inside the transmitted RTP payload.  */
-
-
-    /* The RTP callback: This function is called    */
-    /* every time the encoder has a packet to send. */
-    /* It depends on the encoder if the data starts */
-    /* with a Start Code (it should). H.263 does.   */
-    /* mb_nb contains the number of macroblocks     */
-    /* encoded in the RTP payload.                  */
-    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
-
-    /* statistics, used for 2-pass encoding */
-    int mv_bits;
-    int header_bits;
-    int i_tex_bits;
-    int p_tex_bits;
-    int i_count;
-    int p_count;
-    int skip_count;
-    int misc_bits;
-
-    /**
-     * number of bits used for the previously encoded frame
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    int frame_bits;
-
-    /**
-     * Private data of the user, can be used to carry app specific stuff.
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    void *opaque;
-
-    char codec_name[32];
-    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
-    enum CodecID codec_id; /* see CODEC_ID_xxx */
-
-    /**
-     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-     * This is used to work around some encoder bugs.
-     * A demuxer should set this to what is stored in the field used to identify the codec.
-     * If there are multiple such fields in a container then the demuxer should choose the one
-     * which maximizes the information about the used codec.
-     * If the codec tag field in a container is larger then 32 bits then the demuxer should
-     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
-     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
-     * first.
-     * - encoding: Set by user, if not then the default based on codec_id will be used.
-     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-     */
-    unsigned int codec_tag;
-
-    /**
-     * Work around bugs in encoders which sometimes cannot be detected automatically.
-     * - encoding: Set by user
-     * - decoding: Set by user
-     */
-    int workaround_bugs;
-#define FF_BUG_AUTODETECT       1  ///< autodetection
-#define FF_BUG_OLD_MSMPEG4      2
-#define FF_BUG_XVID_ILACE       4
-#define FF_BUG_UMP4             8
-#define FF_BUG_NO_PADDING       16
-#define FF_BUG_AMV              32
-#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
-#define FF_BUG_QPEL_CHROMA      64
-#define FF_BUG_STD_QPEL         128
-#define FF_BUG_QPEL_CHROMA2     256
-#define FF_BUG_DIRECT_BLOCKSIZE 512
-#define FF_BUG_EDGE             1024
-#define FF_BUG_HPEL_CHROMA      2048
-#define FF_BUG_DC_CLIP          4096
-#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
-//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
-
-    /**
-     * luma single coefficient elimination threshold
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int luma_elim_threshold;
-
-    /**
-     * chroma single coeff elimination threshold
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int chroma_elim_threshold;
-
-    /**
-     * strictly follow the standard (MPEG4, ...).
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     * Setting this to STRICT or higher means the encoder and decoder will
-     * generally do stupid things. While setting it to inofficial or lower
-     * will mean the encoder might use things that are not supported by all
-     * spec compliant decoders. Decoders make no difference between normal,
-     * inofficial and experimental, that is they always try to decode things
-     * when they can unless they are explicitly asked to behave stupid
-     * (=strictly conform to the specs)
-     */
-    int strict_std_compliance;
-#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
-#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
-#define FF_COMPLIANCE_NORMAL        0
-#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
-#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
-
-    /**
-     * qscale offset between IP and B-frames
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float b_quant_offset;
-
-    /**
-     * Error recognization; higher values will detect more errors but may
-     * misdetect some more or less valid parts as errors.
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int error_recognition;
-#define FF_ER_CAREFUL         1
-#define FF_ER_COMPLIANT       2
-#define FF_ER_AGGRESSIVE      3
-#define FF_ER_VERY_AGGRESSIVE 4
-
-    /**
-     * Called at the beginning of each frame to get a buffer for it.
-     * If pic.reference is set then the frame will be read later by libavcodec.
-     * avcodec_align_dimensions() should be used to find the required width and
-     * height, as they normally need to be rounded up to the next multiple of 16.
-     * May be called by different threads if frame threading is enabled, but not
-     * by more than one at the same time.
-     * - encoding: unused
-     * - decoding: Set by libavcodec., user can override.
-     */
-    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
-
-    /**
-     * Called to release buffers which were allocated with get_buffer.
-     * A released buffer can be reused in get_buffer().
-     * pic.data[*] must be set to NULL. May be called by different threads
-     * if frame threading is enabled, but not more than one at the same time.
-     *
-     * - encoding: unused
-     * - decoding: Set by libavcodec., user can override.
-     */
-    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
-
-    /**
-     * Size of the frame reordering buffer in the decoder.
-     * For MPEG-2 it is 1 IPB or 0 low delay IP.
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec.
-     */
-    int has_b_frames;
-
-    /**
-     * number of bytes per packet if constant and known or 0
-     * Used by some WAV based audio codecs.
-     */
-    int block_align;
-
-    int parse_only; /* - decoding only: If true, only parsing is done
-                       (function avcodec_parse_frame()). The frame
-                       data is returned. Only MPEG codecs support this now. */
-
-    /**
-     * 0-> h263 quant 1-> mpeg quant
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mpeg_quant;
-
-    /**
-     * pass1 encoding statistics output buffer
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    char *stats_out;
-
-    /**
-     * pass2 encoding statistics input buffer
-     * Concatenated stuff from stats_out of pass1 should be placed here.
-     * - encoding: Allocated/set/freed by user.
-     * - decoding: unused
-     */
-    char *stats_in;
-
-    /**
-     * ratecontrol qmin qmax limiting method
-     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float rc_qsquish;
-
-    float rc_qmod_amp;
-    int rc_qmod_freq;
-
-    /**
-     * ratecontrol override, see RcOverride
-     * - encoding: Allocated/set/freed by user.
-     * - decoding: unused
-     */
-    RcOverride *rc_override;
-    int rc_override_count;
-
-    /**
-     * rate control equation
-     * - encoding: Set by user
-     * - decoding: unused
-     */
-    const char *rc_eq;
-
-    /**
-     * maximum bitrate
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_max_rate;
-
-    /**
-     * minimum bitrate
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_min_rate;
-
-    /**
-     * decoder bitstream buffer size
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_buffer_size;
-    float rc_buffer_aggressivity;
-
-    /**
-     * qscale factor between P and I-frames
-     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
-     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float i_quant_factor;
-
-    /**
-     * qscale offset between P and I-frames
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float i_quant_offset;
-
-    /**
-     * initial complexity for pass1 ratecontrol
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float rc_initial_cplx;
-
-    /**
-     * DCT algorithm, see FF_DCT_* below
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int dct_algo;
-#define FF_DCT_AUTO    0
-#define FF_DCT_FASTINT 1
-#define FF_DCT_INT     2
-#define FF_DCT_MMX     3
-#define FF_DCT_MLIB    4
-#define FF_DCT_ALTIVEC 5
-#define FF_DCT_FAAN    6
-
-    /**
-     * luminance masking (0-> disabled)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float lumi_masking;
-
-    /**
-     * temporary complexity masking (0-> disabled)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float temporal_cplx_masking;
-
-    /**
-     * spatial complexity masking (0-> disabled)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float spatial_cplx_masking;
-
-    /**
-     * p block masking (0-> disabled)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float p_masking;
-
-    /**
-     * darkness masking (0-> disabled)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float dark_masking;
-
-    /**
-     * IDCT algorithm, see FF_IDCT_* below.
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int idct_algo;
-#define FF_IDCT_AUTO          0
-#define FF_IDCT_INT           1
-#define FF_IDCT_SIMPLE        2
-#define FF_IDCT_SIMPLEMMX     3
-#define FF_IDCT_LIBMPEG2MMX   4
-#define FF_IDCT_PS2           5
-#define FF_IDCT_MLIB          6
-#define FF_IDCT_ARM           7
-#define FF_IDCT_ALTIVEC       8
-#define FF_IDCT_SH4           9
-#define FF_IDCT_SIMPLEARM     10
-#define FF_IDCT_H264          11
-#define FF_IDCT_VP3           12
-#define FF_IDCT_IPP           13
-#define FF_IDCT_XVIDMMX       14
-#define FF_IDCT_CAVS          15
-#define FF_IDCT_SIMPLEARMV5TE 16
-#define FF_IDCT_SIMPLEARMV6   17
-#define FF_IDCT_SIMPLEVIS     18
-#define FF_IDCT_WMV2          19
-#define FF_IDCT_FAAN          20
-#define FF_IDCT_EA            21
-#define FF_IDCT_SIMPLENEON    22
-#define FF_IDCT_SIMPLEALPHA   23
-
-    /**
-     * slice count
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by user (or 0).
-     */
-    int slice_count;
-    /**
-     * slice offsets in the frame in bytes
-     * - encoding: Set/allocated by libavcodec.
-     * - decoding: Set/allocated by user (or NULL).
-     */
-    int *slice_offset;
-
-    /**
-     * error concealment flags
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int error_concealment;
-#define FF_EC_GUESS_MVS   1
-#define FF_EC_DEBLOCK     2
-
-    /**
-     * dsp_mask could be add used to disable unwanted CPU features
-     * CPU features (i.e. MMX, SSE. ...)
-     *
-     * With the FORCE flag you may instead enable given CPU features.
-     * (Dangerous: Usable in case of misdetection, improper usage however will
-     * result into program crash.)
-     */
-    unsigned dsp_mask;
-#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
-    /* lower 16 bits - CPU features */
-#define FF_MM_MMX      0x0001 ///< standard MMX
-#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
-#endif
-#define FF_MM_MMX2     0x0002 ///< SSE integer functions or AMD MMX ext
-#define FF_MM_SSE      0x0008 ///< SSE functions
-#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
-#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
-#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
-#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
-#define FF_MM_SSE4     0x0100 ///< Penryn SSE4.1 functions
-#define FF_MM_SSE42    0x0200 ///< Nehalem SSE4.2 functions
-#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
-#define FF_MM_ALTIVEC  0x0001 ///< standard AltiVec
-
-    /**
-     * bits per sample/pixel from the demuxer (needed for huffyuv).
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by user.
-     */
-     int bits_per_coded_sample;
-
-    /**
-     * prediction method (needed for huffyuv)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-     int prediction_method;
-#define FF_PRED_LEFT   0
-#define FF_PRED_PLANE  1
-#define FF_PRED_MEDIAN 2
-
-    /**
-     * sample aspect ratio (0 if unknown)
-     * That is the width of a pixel divided by the height of the pixel.
-     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    AVRational sample_aspect_ratio;
-
-    /**
-     * the picture in the bitstream
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec.
-     */
-    AVFrame *coded_frame;
-
-    /**
-     * debug
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int debug;
-#define FF_DEBUG_PICT_INFO   1
-#define FF_DEBUG_RC          2
-#define FF_DEBUG_BITSTREAM   4
-#define FF_DEBUG_MB_TYPE     8
-#define FF_DEBUG_QP          16
-#define FF_DEBUG_MV          32
-#define FF_DEBUG_DCT_COEFF   0x00000040
-#define FF_DEBUG_SKIP        0x00000080
-#define FF_DEBUG_STARTCODE   0x00000100
-#define FF_DEBUG_PTS         0x00000200
-#define FF_DEBUG_ER          0x00000400
-#define FF_DEBUG_MMCO        0x00000800
-#define FF_DEBUG_BUGS        0x00001000
-#define FF_DEBUG_VIS_QP      0x00002000
-#define FF_DEBUG_VIS_MB_TYPE 0x00004000
-#define FF_DEBUG_BUFFERS     0x00008000
-
-    /**
-     * debug
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int debug_mv;
-#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
-#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
-#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
-
-    /**
-     * error
-     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
-     * - decoding: unused
-     */
-    uint64_t error[4];
-
-    /**
-     * minimum MB quantizer
-     * - encoding: unused
-     * - decoding: unused
-     */
-    int mb_qmin;
-
-    /**
-     * maximum MB quantizer
-     * - encoding: unused
-     * - decoding: unused
-     */
-    int mb_qmax;
-
-    /**
-     * motion estimation comparison function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_cmp;
-    /**
-     * subpixel motion estimation comparison function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_sub_cmp;
-    /**
-     * macroblock comparison function (not supported yet)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mb_cmp;
-    /**
-     * interlaced DCT comparison function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int ildct_cmp;
-#define FF_CMP_SAD    0
-#define FF_CMP_SSE    1
-#define FF_CMP_SATD   2
-#define FF_CMP_DCT    3
-#define FF_CMP_PSNR   4
-#define FF_CMP_BIT    5
-#define FF_CMP_RD     6
-#define FF_CMP_ZERO   7
-#define FF_CMP_VSAD   8
-#define FF_CMP_VSSE   9
-#define FF_CMP_NSSE   10
-#define FF_CMP_W53    11
-#define FF_CMP_W97    12
-#define FF_CMP_DCTMAX 13
-#define FF_CMP_DCT264 14
-#define FF_CMP_CHROMA 256
-
-    /**
-     * ME diamond size & shape
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int dia_size;
-
-    /**
-     * amount of previous MV predictors (2a+1 x 2a+1 square)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int last_predictor_count;
-
-    /**
-     * prepass for motion estimation
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int pre_me;
-
-    /**
-     * motion estimation prepass comparison function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_pre_cmp;
-
-    /**
-     * ME prepass diamond size & shape
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int pre_dia_size;
-
-    /**
-     * subpel ME quality
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_subpel_quality;
-
-    /**
-     * callback to negotiate the pixelFormat
-     * @param fmt is the list of formats which are supported by the codec,
-     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
-     * The first is always the native one.
-     * @return the chosen format
-     * - encoding: unused
-     * - decoding: Set by user, if not set the native format will be chosen.
-     */
-    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
-
-    /**
-     * DTG active format information (additional aspect ratio
-     * information only used in DVB MPEG-2 transport streams)
-     * 0 if not set.
-     *
-     * - encoding: unused
-     * - decoding: Set by decoder.
-     */
-    int dtg_active_format;
-#define FF_DTG_AFD_SAME         8
-#define FF_DTG_AFD_4_3          9
-#define FF_DTG_AFD_16_9         10
-#define FF_DTG_AFD_14_9         11
-#define FF_DTG_AFD_4_3_SP_14_9  13
-#define FF_DTG_AFD_16_9_SP_14_9 14
-#define FF_DTG_AFD_SP_4_3       15
-
-    /**
-     * maximum motion estimation search range in subpel units
-     * If 0 then no limit.
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_range;
-
-    /**
-     * intra quantizer bias
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int intra_quant_bias;
-#define FF_DEFAULT_QUANT_BIAS 999999
-
-    /**
-     * inter quantizer bias
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int inter_quant_bias;
-
-    /**
-     * color table ID
-     * - encoding: unused
-     * - decoding: Which clrtable should be used for 8bit RGB images.
-     *             Tables have to be stored somewhere. FIXME
-     */
-    int color_table_id;
-
-    /**
-     * internal_buffer count
-     * Don't touch, used by libavcodec default_get_buffer().
-     */
-    int internal_buffer_count;
-
-    /**
-     * internal_buffers
-     * Don't touch, used by libavcodec default_get_buffer().
-     */
-    void *internal_buffer;
-
-#define FF_LAMBDA_SHIFT 7
-#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
-#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
-#define FF_LAMBDA_MAX (256*128-1)
-
-#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
-    /**
-     * Global quality for codecs which cannot change it per frame.
-     * This should be proportional to MPEG-1/2/4 qscale.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int global_quality;
-
-#define FF_CODER_TYPE_VLC       0
-#define FF_CODER_TYPE_AC        1
-#define FF_CODER_TYPE_RAW       2
-#define FF_CODER_TYPE_RLE       3
-#define FF_CODER_TYPE_DEFLATE   4
-    /**
-     * coder type
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int coder_type;
-
-    /**
-     * context model
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int context_model;
-#if 0
-    /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
-#endif
-
-    /**
-     * slice flags
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int slice_flags;
-#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
-#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
-#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
-
-    /**
-     * XVideo Motion Acceleration
-     * - encoding: forbidden
-     * - decoding: set by decoder
-     */
-    int xvmc_acceleration;
-
-    /**
-     * macroblock decision mode
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mb_decision;
-#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
-#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
-#define FF_MB_DECISION_RD     2        ///< rate distortion
-
-    /**
-     * custom intra quantization matrix
-     * - encoding: Set by user, can be NULL.
-     * - decoding: Set by libavcodec.
-     */
-    uint16_t *intra_matrix;
-
-    /**
-     * custom inter quantization matrix
-     * - encoding: Set by user, can be NULL.
-     * - decoding: Set by libavcodec.
-     */
-    uint16_t *inter_matrix;
-
-    /**
-     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-     * This is used to work around some encoder bugs.
-     * - encoding: unused
-     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-     */
-    unsigned int stream_codec_tag;
-
-    /**
-     * scene change detection threshold
-     * 0 is default, larger means fewer detected scene changes.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int scenechange_threshold;
-
-    /**
-     * minimum Lagrange multipler
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int lmin;
-
-    /**
-     * maximum Lagrange multipler
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int lmax;
-
-    /**
-     * palette control structure
-     * - encoding: ??? (no palette-enabled encoder yet)
-     * - decoding: Set by user.
-     */
-    struct AVPaletteControl *palctrl;
-
-    /**
-     * noise reduction strength
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int noise_reduction;
-
-    /**
-     * Called at the beginning of a frame to get cr buffer for it.
-     * Buffer type (size, hints) must be the same. libavcodec won't check it.
-     * libavcodec will pass previous buffer in pic, function should return
-     * same buffer or new buffer with old frame "painted" into it.
-     * If pic.data[0] == NULL must behave like get_buffer().
-     * - encoding: unused
-     * - decoding: Set by libavcodec., user can override
-     */
-    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
-
-    /**
-     * Number of bits which should be loaded into the rc buffer before decoding starts.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_initial_buffer_occupancy;
-
-    /**
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int inter_threshold;
-
-    /**
-     * CODEC_FLAG2_*
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int flags2;
-
-    /**
-     * Simulates errors in the bitstream to test error concealment.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int error_rate;
-
-    /**
-     * MP3 antialias algorithm, see FF_AA_* below.
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int antialias_algo;
-#define FF_AA_AUTO    0
-#define FF_AA_FASTINT 1 //not implemented yet
-#define FF_AA_INT     2
-#define FF_AA_FLOAT   3
-    /**
-     * quantizer noise shaping
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int quantizer_noise_shaping;
-
-    /**
-     * thread count
-     * is used to decide how many independent tasks should be passed to execute()
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int thread_count;
-
-    /**
-     * The codec may call this to execute several independent things.
-     * It will return only after finishing all tasks.
-     * The user may replace this with some multithreaded implementation,
-     * the default implementation will execute the parts serially.
-     * @param count the number of things to execute
-     * - encoding: Set by libavcodec, user can override.
-     * - decoding: Set by libavcodec, user can override.
-     */
-    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
-
-    /**
-     * thread opaque
-     * Can be used by execute() to store some per AVCodecContext stuff.
-     * - encoding: set by execute()
-     * - decoding: set by execute()
-     */
-    void *thread_opaque;
-
-    /**
-     * Motion estimation threshold below which no motion estimation is
-     * performed, but instead the user specified motion vectors are used.
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-     int me_threshold;
-
-    /**
-     * Macroblock threshold below which the user specified macroblock types will be used.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-     int mb_threshold;
-
-    /**
-     * precision of the intra DC coefficient - 8
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-     int intra_dc_precision;
-
-    /**
-     * noise vs. sse weight for the nsse comparsion function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-     int nsse_weight;
-
-    /**
-     * Number of macroblock rows at the top which are skipped.
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-     int skip_top;
-
-    /**
-     * Number of macroblock rows at the bottom which are skipped.
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-     int skip_bottom;
-
-    /**
-     * profile
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-     int profile;
-#define FF_PROFILE_UNKNOWN -99
-#define FF_PROFILE_AAC_MAIN 0
-#define FF_PROFILE_AAC_LOW  1
-#define FF_PROFILE_AAC_SSR  2
-#define FF_PROFILE_AAC_LTP  3
-
-    /**
-     * level
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-     int level;
-#define FF_LEVEL_UNKNOWN -99
-
-    /**
-     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-     int lowres;
-
-    /**
-     * Bitstream width / height, may be different from width/height if lowres
-     * or other things are used.
-     * - encoding: unused
-     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
-     */
-    int coded_width, coded_height;
-
-    /**
-     * frame skip threshold
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int frame_skip_threshold;
-
-    /**
-     * frame skip factor
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int frame_skip_factor;
-
-    /**
-     * frame skip exponent
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int frame_skip_exp;
-
-    /**
-     * frame skip comparison function
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int frame_skip_cmp;
-
-    /**
-     * Border processing masking, raises the quantizer for mbs on the borders
-     * of the picture.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float border_masking;
-
-    /**
-     * minimum MB lagrange multipler
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mb_lmin;
-
-    /**
-     * maximum MB lagrange multipler
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mb_lmax;
-
-    /**
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int me_penalty_compensation;
-
-    /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    enum AVDiscard skip_loop_filter;
-
-    /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    enum AVDiscard skip_idct;
-
-    /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    enum AVDiscard skip_frame;
-
-    /**
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int bidir_refine;
-
-    /**
-     *
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int brd_scale;
-
-    /**
-     * constant rate factor - quality-based VBR - values ~correspond to qps
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float crf;
-
-    /**
-     * constant quantization parameter rate control method
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int cqp;
-
-    /**
-     * minimum GOP size
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int keyint_min;
-
-    /**
-     * number of reference frames
-     * - encoding: Set by user.
-     * - decoding: Set by lavc.
-     */
-    int refs;
-
-    /**
-     * chroma qp offset from luma
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int chromaoffset;
-
-    /**
-     * Influences how often B-frames are used.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int bframebias;
-
-    /**
-     * trellis RD quantization
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int trellis;
-
-    /**
-     * Reduce fluctuations in qp (before curve compression).
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float complexityblur;
-
-    /**
-     * in-loop deblocking filter alphac0 parameter
-     * alpha is in the range -6...6
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int deblockalpha;
-
-    /**
-     * in-loop deblocking filter beta parameter
-     * beta is in the range -6...6
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int deblockbeta;
-
-    /**
-     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int partitions;
-#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
-#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
-#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
-#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
-#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
-
-    /**
-     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int directpred;
-
-    /**
-     * Audio cutoff bandwidth (0 means "automatic")
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int cutoff;
-
-    /**
-     * Multiplied by qscale for each frame and added to scene_change_score.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int scenechange_factor;
-
-    /**
-     *
-     * Note: Value depends upon the compare function used for fullpel ME.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int mv0_threshold;
-
-    /**
-     * Adjusts sensitivity of b_frame_strategy 1.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int b_sensitivity;
-
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int compression_level;
-#define FF_COMPRESSION_DEFAULT -1
-
-    /**
-     * Sets whether to use LPC mode - used by FLAC encoder.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int use_lpc;
-
-    /**
-     * LPC coefficient precision - used by FLAC encoder
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int lpc_coeff_precision;
-
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int min_prediction_order;
-
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int max_prediction_order;
-
-    /**
-     * search method for selecting prediction order
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int prediction_order_method;
-
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int min_partition_order;
-
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int max_partition_order;
-
-    /**
-     * GOP timecode frame start number, in non drop frame format
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int64_t timecode_frame_start;
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    /**
-     * Decoder should decode to this many channels if it can (0 for default)
-     * - encoding: unused
-     * - decoding: Set by user.
-     * @deprecated Deprecated in favor of request_channel_layout.
-     */
-    int request_channels;
-#endif
-
-    /**
-     * Percentage of dynamic range compression to be applied by the decoder.
-     * The default value is 1.0, corresponding to full compression.
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    float drc_scale;
-
-    /**
-     * opaque 64bit number (generally a PTS) that will be reordered and
-     * output in AVFrame.reordered_opaque
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int64_t reordered_opaque;
-
-    /**
-     * Bits per sample/pixel of internal libavcodec pixel/sample format.
-     * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
-     * - encoding: set by user.
-     * - decoding: set by libavcodec.
-     */
-    int bits_per_raw_sample;
-
-    /**
-     * Audio channel layout.
-     * - encoding: set by user.
-     * - decoding: set by libavcodec.
-     */
-    int64_t channel_layout;
-
-    /**
-     * Request decoder to use this channel layout if it can (0 for default)
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int64_t request_channel_layout;
-
-    /**
-     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
-     * - encoding: Set by user.
-     * - decoding: unused.
-     */
-    float rc_max_available_vbv_use;
-
-    /**
-     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
-     * - encoding: Set by user.
-     * - decoding: unused.
-     */
-    float rc_min_vbv_overflow_use;
-
-        /**
-     * Hardware accelerator in use
-     * - encoding: unused.
-     * - decoding: Set by libavcodec
-     */
-    struct AVHWAccel *hwaccel;
-
-    /**
-     * For some codecs, the time base is closer to the field rate than the frame rate.
-     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
-     * if no telecine is used ...
-     *
-     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
-     */
-    int ticks_per_frame;
-
-    /**
-     * Hardware accelerator context.
-     * For some hardware accelerators, a global context needs to be
-     * provided by the user. In that case, this holds display-dependent
-     * data FFmpeg cannot instantiate itself. Please refer to the
-     * FFmpeg HW accelerator documentation to know how to fill this
-     * is. e.g. for VA API, this is a struct vaapi_context.
-     * - encoding: unused
-     * - decoding: Set by user
-     */
-    void *hwaccel_context;
-
-    /**
-     * Chromaticity coordinates of the source primaries.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
-     */
-    enum AVColorPrimaries color_primaries;
-
-    /**
-     * Color Transfer Characteristic.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
-     */
-    enum AVColorTransferCharacteristic color_trc;
-
-    /**
-     * YUV colorspace type.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
-     */
-    enum AVColorSpace colorspace;
-
-    /**
-     * MPEG vs JPEG YUV range.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
-     */
-    enum AVColorRange color_range;
-
-    /**
-     * Whether this is a copy of the context which had init() called on it.
-     * This is used by multithreading - shared tables and picture pointers
-     * should be freed from the original context only.
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec.
-     */
-    int is_copy;
-
-    /**
-     * Which multithreading methods to use, for codecs that support more than one.
-     * - encoding: Set by user, otherwise the default is used.
-     * - decoding: Set by user, otherwise the default is used.
-     */
-    int thread_type;
-#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
-#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
-#define FF_THREAD_DEFAULT 3 //< Use both if possible.
-
-    /**
-     * Which multithreading methods are actually active at the moment.
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec.
-     */
-    int active_thread_type;
-} AVCodecContext;
-
-/**
- * AVCodec.
- */
-typedef struct AVCodec {
-    /**
-     * Name of the codec implementation.
-     * The name is globally unique among encoders and among decoders (but an
-     * encoder and a decoder can share the same name).
-     * This is the primary way to find a codec from the user perspective.
-     */
-    const char *name;
-    enum CodecType type;
-    enum CodecID id;
-    int priv_data_size;
-    int (*init)(AVCodecContext *);
-    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
-    int (*close)(AVCodecContext *);
-    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
-    /**
-     * Codec capabilities.
-     * see CODEC_CAP_*
-     */
-    int capabilities;
-    struct AVCodec *next;
-    /**
-     * Flush buffers.
-     * Will be called when seeking
-     */
-    void (*flush)(AVCodecContext *);
-    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
-    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
-    /**
-     * Descriptive name for the codec, meant to be more human readable than \p name.
-     * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it.
-     */
-    const char *long_name;
-    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
-    const enum SampleFormat *sample_fmts;   ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
-    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
-
-    /**
-     * @defgroup framethreading Frame threading support functions.
-     * @{
-     */
-    /**
-     * If the codec allocates writable tables in init(), define init_copy() to re-allocate
-     * them in the copied contexts. Before calling it, priv_data will be set to a copy of
-     * the original.
-     */
-    int (*init_copy)(AVCodecContext *);
-    /**
-     * Copy all necessary context variables from the last thread before starting the next one.
-     * If the codec doesn't define this, the next thread will start automatically; otherwise,
-     * the codec must call ff_report_frame_setup_done(). Do not assume anything about the
-     * contents of priv data except that it has been copied from the original some time after
-     * codec init. Will not be called if frame threading is disabled.
-     */
-    int (*update_context)(AVCodecContext *, AVCodecContext *from);
-    /** @} */
-} AVCodec;
-
-/**
- * AVHWAccel.
- */
-typedef struct AVHWAccel {
-    /**
-     * Name of the hardware accelerated codec.
-     * The name is globally unique among encoders and among decoders (but an
-     * encoder and a decoder can share the same name).
-     */
-    const char *name;
-
-    /**
-     * Type of codec implemented by the hardware accelerator.
-     *
-     * See CODEC_TYPE_xxx
-     */
-    enum CodecType type;
-
-    /**
-     * Codec implemented by the hardware accelerator.
-     *
-     * See CODEC_ID_xxx
-     */
-    enum CodecID id;
-
-    /**
-     * Supported pixel format.
-     *
-     * Only hardware accelerated formats are supported here.
-     */
-    enum PixelFormat pix_fmt;
-
-    /**
-     * Hardware accelerated codec capabilities.
-     * see FF_HWACCEL_CODEC_CAP_*
-     */
-    int capabilities;
-
-    struct AVHWAccel *next;
-
-    /**
-     * Called at the beginning of each frame or field picture.
-     *
-     * Meaningful frame information (codec specific) is guaranteed to
-     * be parsed at this point. This function is mandatory.
-     *
-     * Note that \p buf can be NULL along with \p buf_size set to 0.
-     * Otherwise, this means the whole frame is available at this point.
-     *
-     * @param avctx the codec context
-     * @param buf the frame data buffer base
-     * @param buf_size the size of the frame in bytes
-     * @return zero if successful, a negative value otherwise
-     */
-    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
-
-    /**
-     * Callback for each slice.
-     *
-     * Meaningful slice information (codec specific) is guaranteed to
-     * be parsed at this point. This function is mandatory.
-     *
-     * @param avctx the codec context
-     * @param buf the slice data buffer base
-     * @param buf_size the size of the slice in bytes
-     * @return zero if successful, a negative value otherwise
-     */
-    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
-
-    /**
-     * Called at the end of each frame or field picture.
-     *
-     * The whole picture is parsed at this point and can now be sent
-     * to the hardware accelerator. This function is mandatory.
-     *
-     * @param avctx the codec context
-     * @return zero if successful, a negative value otherwise
-     */
-    int (*end_frame)(AVCodecContext *avctx);
-
-    /**
-     * Size of HW accelerator private data.
-     *
-     * Private data is allocated with av_mallocz() before
-     * AVCodecContext.get_buffer() and deallocated after
-     * AVCodecContext.release_buffer().
-     */
-    int priv_data_size;
-} AVHWAccel;
-
-/**
- * four components are given, that's all.
- * the last component is alpha
- */
-typedef struct AVPicture {
-    uint8_t *data[4];
-    int linesize[4];       ///< number of bytes per line
-} AVPicture;
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * AVPaletteControl
- * This structure defines a method for communicating palette changes
- * between and demuxer and a decoder.
- *
- * @deprecated Use AVPacket to send palette changes instead.
- * This is totally broken.
- */
-#define AVPALETTE_SIZE 1024
-#define AVPALETTE_COUNT 256
-typedef struct AVPaletteControl {
-
-    /* Demuxer sets this to 1 to indicate the palette has changed;
-     * decoder resets to 0. */
-    int palette_changed;
-
-    /* 4-byte ARGB palette entries, stored in native byte order; note that
-     * the individual palette components should be on a 8-bit scale; if
-     * the palette data comes from an IBM VGA native format, the component
-     * data is probably 6 bits in size and needs to be scaled. */
-    unsigned int palette[AVPALETTE_COUNT];
-
-} AVPaletteControl attribute_deprecated;
-#endif
-
-enum AVSubtitleType {
-    SUBTITLE_NONE,
-
-    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
-
-    /**
-     * Plain text, the text field must be set by the decoder and is
-     * authoritative. ass and pict fields may contain approximations.
-     */
-    SUBTITLE_TEXT,
-
-    /**
-     * Formatted text, the ass field must be set by the decoder and is
-     * authoritative. pict and text fields may contain approximations.
-     */
-    SUBTITLE_ASS,
-};
-
-typedef struct AVSubtitleRect {
-    int x;         ///< top left corner  of pict, undefined when pict is not set
-    int y;         ///< top left corner  of pict, undefined when pict is not set
-    int w;         ///< width            of pict, undefined when pict is not set
-    int h;         ///< height           of pict, undefined when pict is not set
-    int nb_colors; ///< number of colors in pict, undefined when pict is not set
-
-    /**
-     * data+linesize for the bitmap of this subtitle.
-     * can be set for text/ass as well once they where rendered
-     */
-    AVPicture pict;
-    enum AVSubtitleType type;
-
-    char *text;                     ///< 0 terminated plain UTF-8 text
-
-    /**
-     * 0 terminated ASS/SSA compatible event line.
-     * The pressentation of this is unaffected by the other values in this
-     * struct.
-     */
-    char *ass;
-} AVSubtitleRect;
-
-typedef struct AVSubtitle {
-    uint16_t format; /* 0 = graphics */
-    uint32_t start_display_time; /* relative to packet pts, in ms */
-    uint32_t end_display_time; /* relative to packet pts, in ms */
-    unsigned num_rects;
-    AVSubtitleRect **rects;
-} AVSubtitle;
-
-/* packet functions */
-
-/**
- * @deprecated use NULL instead
- */
-attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
-
-/**
- * Default packet destructor.
- */
-void av_destruct_packet(AVPacket *pkt);
-
-/**
- * Initialize optional fields of a packet with default values.
- *
- * @param pkt packet
- */
-void av_init_packet(AVPacket *pkt);
-
-/**
- * Allocate the payload of a packet and initialize its fields with
- * default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return 0 if OK, AVERROR_xxx otherwise
- */
-int av_new_packet(AVPacket *pkt, int size);
-
-/**
- * Reduce packet size, correctly zeroing padding
- *
- * @param pkt packet
- * @param size new size
- */
-void av_shrink_packet(AVPacket *pkt, int size);
-
-/**
- * @warning This is a hack - the packet memory allocation stuff is broken. The
- * packet is allocated if it was not really allocated.
- */
-int av_dup_packet(AVPacket *pkt);
-
-/**
- * Free a packet.
- *
- * @param pkt packet to free
- */
-void av_free_packet(AVPacket *pkt);
-
-/* resample.c */
-
-struct ReSampleContext;
-struct AVResampleContext;
-
-typedef struct ReSampleContext ReSampleContext;
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Use av_audio_resample_init() instead.
- */
-attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
-                                                          int output_rate, int input_rate);
-#endif
-/**
- *  Initializes audio resampling context
- *
- * @param output_channels  number of output channels
- * @param input_channels   number of input channels
- * @param output_rate      output sample rate
- * @param input_rate       input sample rate
- * @param sample_fmt_out   requested output sample format
- * @param sample_fmt_in    input sample format
- * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff freq
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear           If 1 then the used FIR filter will be linearly interpolated
-                           between the 2 closest, if 0 the closest will be used
- * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
- * @return allocated ReSampleContext, NULL if error occured
- */
-ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
-                                        int output_rate, int input_rate,
-                                        enum SampleFormat sample_fmt_out,
-                                        enum SampleFormat sample_fmt_in,
-                                        int filter_length, int log2_phase_count,
-                                        int linear, double cutoff);
-
-int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
-void audio_resample_close(ReSampleContext *s);
-
-
-/**
- * Initializes an audio resampler.
- * Note, if either rate is not an integer then simply scale both rates up so they are.
- * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear If 1 then the used FIR filter will be linearly interpolated
-                 between the 2 closest, if 0 the closest will be used
- * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
- */
-struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
-
-/**
- * resamples.
- * @param src an array of unconsumed samples
- * @param consumed the number of samples of src which have been consumed are returned here
- * @param src_size the number of unconsumed samples available
- * @param dst_size the amount of space in samples available in dst
- * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
- * @return the number of samples written in dst or -1 if an error occurred
- */
-int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
-
-
-/**
- * Compensates samplerate/timestamp drift. The compensation is done by changing
- * the resampler parameters, so no audible clicks or similar distortions occur
- * @param compensation_distance distance in output samples over which the compensation should be performed
- * @param sample_delta number of output samples which should be output less
- *
- * example: av_resample_compensate(c, 10, 500)
- * here instead of 510 samples only 500 samples would be output
- *
- * note, due to rounding the actual compensation might be slightly different,
- * especially if the compensation_distance is large and the in_rate used during init is small
- */
-void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
-void av_resample_close(struct AVResampleContext *c);
-
-/**
- * Allocate memory for a picture.  Call avpicture_free to free it.
- *
- * @param picture the picture to be filled in
- * @param pix_fmt the format of the picture
- * @param width the width of the picture
- * @param height the height of the picture
- * @return zero if successful, a negative value if not
- */
-int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
-
-/**
- * Free a picture previously allocated by avpicture_alloc().
- *
- * @param picture the AVPicture to be freed
- */
-void avpicture_free(AVPicture *picture);
-
-/**
- * Fill in the AVPicture fields.
- * The fields of the given AVPicture are filled in by using the 'ptr' address
- * which points to the image data buffer. Depending on the specified picture
- * format, one or multiple image data pointers and line sizes will be set.
- * If a planar format is specified, several pointers will be set pointing to
- * the different picture planes and the line sizes of the different planes
- * will be stored in the lines_sizes array.
- * Call with ptr == NULL to get the required size for the ptr buffer.
- *
- * @param picture AVPicture whose fields are to be filled in
- * @param ptr Buffer which will contain or contains the actual image data
- * @param pix_fmt The format in which the picture data is stored.
- * @param width the width of the image in pixels
- * @param height the height of the image in pixels
- * @return size of the image data in bytes
- */
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
-                   int pix_fmt, int width, int height);
-int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
-                     unsigned char *dest, int dest_size);
-
-/**
- * Calculate the size in bytes that a picture of the given width and height
- * would occupy if stored in the given picture format.
- * Note that this returns the size of a compact representation as generated
- * by avpicture_layout, which can be smaller than the size required for e.g.
- * avpicture_fill.
- *
- * @param pix_fmt the given picture format
- * @param width the width of the image
- * @param height the height of the image
- * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
- */
-int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
-void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
-const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
-void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
-
-/**
- * Returns the pixel format corresponding to the name \p name.
- *
- * If there is no pixel format with name \p name, then looks for a
- * pixel format with the name corresponding to the native endian
- * format of \p name.
- * For example in a little-endian system, first looks for "gray16",
- * then for "gray16le".
- *
- * Finally if no pixel format has been found, returns \c PIX_FMT_NONE.
- */
-enum PixelFormat avcodec_get_pix_fmt(const char* name);
-unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
-
-#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
-#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
-#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
-#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
-#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
-#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
-
-/**
- * Computes what kind of losses will occur when converting from one specific
- * pixel format to another.
- * When converting from one pixel format to another, information loss may occur.
- * For example, when converting from RGB24 to GRAY, the color information will
- * be lost. Similarly, other losses occur when converting from some formats to
- * other formats. These losses can involve loss of chroma, but also loss of
- * resolution, loss of color depth, loss due to the color space conversion, loss
- * of the alpha bits or loss due to color quantization.
- * avcodec_get_fix_fmt_loss() informs you about the various types of losses
- * which will occur when converting from one pixel format to another.
- *
- * @param[in] dst_pix_fmt destination pixel format
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @return Combination of flags informing you what kind of losses will occur.
- */
-int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
-                             int has_alpha);
-
-/**
- * Finds the best pixel format to convert to given a certain source pixel
- * format.  When converting from one pixel format to another, information loss
- * may occur.  For example, when converting from RGB24 to GRAY, the color
- * information will be lost. Similarly, other losses occur when converting from
- * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
- * the given pixel formats should be used to suffer the least amount of loss.
- * The pixel formats from which it chooses one, are determined by the
- * \p pix_fmt_mask parameter.
- *
- * @code
- * src_pix_fmt = PIX_FMT_YUV420P;
- * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
- * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
- * @endcode
- *
- * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
- * @return The best pixel format to convert to or -1 if none was found.
- */
-enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
-                              int has_alpha, int *loss_ptr);
-
-
-/**
- * Print in buf the string corresponding to the pixel format with
- * number pix_fmt, or an header if pix_fmt is negative.
- *
- * @param[in] buf the buffer where to write the string
- * @param[in] buf_size the size of buf
- * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
- * a negative value to print the corresponding header.
- * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
- */
-void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
-
-#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
-#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
-
-/**
- * Tell if an image really has transparent alpha values.
- * @return ored mask of FF_ALPHA_xxx constants
- */
-int img_get_alpha_info(const AVPicture *src,
-                       enum PixelFormat pix_fmt, int width, int height);
-
-/* deinterlace a picture */
-/* deinterlace - if not supported return -1 */
-int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
-                          enum PixelFormat pix_fmt, int width, int height);
-
-/* external high level API */
-
-/**
- * If c is NULL, returns the first registered codec,
- * if c is non-NULL, returns the next registered codec after c,
- * or NULL if c is the last one.
- */
-AVCodec *av_codec_next(AVCodec *c);
-
-/**
- * Returns the LIBAVCODEC_VERSION_INT constant.
- */
-unsigned avcodec_version(void);
-
-/**
- * Initializes libavcodec.
- *
- * @warning This function \e must be called before any other libavcodec
- * function.
- */
-void avcodec_init(void);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Deprecated in favor of avcodec_register().
- */
-attribute_deprecated void register_avcodec(AVCodec *codec);
-#endif
-
-/**
- * Register the codec \p codec and initialize libavcodec.
- *
- * @see avcodec_init()
- */
-void avcodec_register(AVCodec *codec);
-
-/**
- * Finds a registered encoder with a matching codec ID.
- *
- * @param id CodecID of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_encoder(enum CodecID id);
-
-/**
- * Finds a registered encoder with the specified name.
- *
- * @param name name of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_encoder_by_name(const char *name);
-
-/**
- * Finds a registered decoder with a matching codec ID.
- *
- * @param id CodecID of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_decoder(enum CodecID id);
-
-/**
- * Finds a registered decoder with the specified name.
- *
- * @param name name of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_decoder_by_name(const char *name);
-void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
-
-/**
- * Sets the fields of the given AVCodecContext to default values.
- *
- * @param s The AVCodecContext of which the fields should be set to default values.
- */
-void avcodec_get_context_defaults(AVCodecContext *s);
-
-/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
- *  we WILL change its arguments and name a few times! */
-void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
-
-/**
- * Allocates an AVCodecContext and sets its fields to default values.  The
- * resulting struct can be deallocated by simply calling av_free().
- *
- * @return An AVCodecContext filled with default values or NULL on failure.
- * @see avcodec_get_context_defaults
- */
-AVCodecContext *avcodec_alloc_context(void);
-
-/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
- *  we WILL change its arguments and name a few times! */
-AVCodecContext *avcodec_alloc_context2(enum CodecType);
-
-/**
- * Sets the fields of the given AVFrame to default values.
- *
- * @param pic The AVFrame of which the fields should be set to default values.
- */
-void avcodec_get_frame_defaults(AVFrame *pic);
-
-/**
- * Allocates an AVFrame and sets its fields to default values.  The resulting
- * struct can be deallocated by simply calling av_free().
- *
- * @return An AVFrame filled with default values or NULL on failure.
- * @see avcodec_get_frame_defaults
- */
-AVFrame *avcodec_alloc_frame(void);
-
-int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
-void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
-int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
-void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
-
-/**
- * Checks if the given dimension of a picture is valid, meaning that all
- * bytes of the picture can be addressed with a signed int.
- *
- * @param[in] w Width of the picture.
- * @param[in] h Height of the picture.
- * @return Zero if valid, a negative value if invalid.
- */
-int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
-enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
-
-int avcodec_thread_init(AVCodecContext *s, int thread_count);
-void avcodec_thread_free(AVCodecContext *s);
-int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
-int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
-//FIXME func typedef
-
-/**
- * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
- * function the context has to be allocated.
- *
- * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
- * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
- * retrieving a codec.
- *
- * @warning This function is not thread safe!
- *
- * @code
- * avcodec_register_all();
- * codec = avcodec_find_decoder(CODEC_ID_H264);
- * if (!codec)
- *     exit(1);
- *
- * context = avcodec_alloc_context();
- *
- * if (avcodec_open(context, codec) < 0)
- *     exit(1);
- * @endcode
- *
- * @param avctx The context which will be set up to use the given codec.
- * @param codec The codec to use within the context.
- * @return zero on success, a negative value on error
- * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
- */
-int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * Decodes an audio frame from \p buf into \p samples.
- * Wrapper function which calls avcodec_decode_audio3.
- *
- * @deprecated Use avcodec_decode_audio3 instead.
- * @param avctx the codec context
- * @param[out] samples the output buffer
- * @param[in,out] frame_size_ptr the output buffer size in bytes
- * @param[in] buf the input buffer
- * @param[in] buf_size the input buffer size in bytes
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
-                         int *frame_size_ptr,
-                         const uint8_t *buf, int buf_size);
-#endif
-
-/**
- * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
- * Some decoders may support multiple frames in a single AVPacket, such
- * decoders would then just decode the first frame.
- * If no frame
- * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
- * decompressed frame size in \e bytes.
- *
- * @warning You \e must set \p frame_size_ptr to the allocated size of the
- * output buffer before calling avcodec_decode_audio3().
- *
- * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer \p avpkt->data should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @note You might have to align the input buffer \p avpkt->data and output buffer \p
- * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance. In practice, the
- * bitstream should have 4 byte alignment at minimum and all sample data should
- * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
- * the linesize is not a multiple of 16 then there's no sense in aligning the
- * start of the buffer to 16.
- *
- * @param avctx the codec context
- * @param[out] samples the output buffer
- * @param[in,out] frame_size_ptr the output buffer size in bytes
- * @param[in] avpkt The input AVPacket containing the input buffer.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
-                         int *frame_size_ptr,
-                         AVPacket *avpkt);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * Decodes a video frame from \p buf into \p picture.
- * Wrapper function which calls avcodec_decode_video2.
- *
- * @deprecated Use avcodec_decode_video2 instead.
- * @param avctx the codec context
- * @param[out] picture The AVFrame in which the decoded video frame will be stored.
- * @param[in] buf the input buffer
- * @param[in] buf_size the size of the input buffer in bytes
- * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
-                         int *got_picture_ptr,
-                         const uint8_t *buf, int buf_size);
-#endif
-
-/**
- * Decodes the video frame of size avpkt->size from avpkt->data into picture.
- * Some decoders may support multiple frames in a single AVPacket, such
- * decoders would then just decode the first frame.
- *
- * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer \p buf should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @note You might have to align the input buffer \p avpkt->data and output buffer \p
- * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance. In practice, the
- * bitstream should have 4 byte alignment at minimum and all sample data should
- * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
- * the linesize is not a multiple of 16 then there's no sense in aligning the
- * start of the buffer to 16.
- *
- * @note Some codecs have a delay between input and output, these need to be
- * feeded with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
- *
- * @param avctx the codec context
- * @param[out] picture The AVFrame in which the decoded video frame will be stored.
- * @param[in] avpkt The input AVpacket containing the input buffer.
- * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
-                         int *got_picture_ptr,
-                         AVPacket *avpkt);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/* Decode a subtitle message. Return -1 if error, otherwise return the
- * number of bytes used. If no subtitle could be decompressed,
- * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
-attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            const uint8_t *buf, int buf_size);
-#endif
-
-/**
- * Decodes a subtitle message.
- * Returns a negative value on error, otherwise returns the number of bytes used.
- * If no subtitle could be decompressed, \p got_sub_ptr is zero.
- * Otherwise, the subtitle is stored in \p *sub.
- *
- * @param avctx the codec context
- * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
- * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
- * @param[in] avpkt The input AVPacket containing the input buffer.
- */
-int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            AVPacket *avpkt);
-int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
-                        int *data_size_ptr,
-                        uint8_t *buf, int buf_size);
-
-/**
- * Encodes an audio frame from \p samples into \p buf.
- *
- * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
- * However, for PCM audio the user will know how much space is needed
- * because it depends on the value passed in \p buf_size as described
- * below. In that case a lower value can be used.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer
- * @param[in] buf_size the output buffer size
- * @param[in] samples the input buffer containing the samples
- * The number of samples read from this buffer is frame_size*channels,
- * both of which are defined in \p avctx.
- * For PCM audio the number of samples read from \p samples is equal to
- * \p buf_size * input_sample_size / output_sample_size.
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used to encode the data read from the input buffer.
- */
-int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                         const short *samples);
-
-/**
- * Encodes a video frame from \p pict into \p buf.
- * The input picture should be
- * stored using a specific format, namely \c avctx.pix_fmt.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer for the bitstream of encoded frame
- * @param[in] buf_size the size of the output buffer in bytes
- * @param[in] pict the input picture to encode
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used from the output buffer.
- */
-int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                         const AVFrame *pict);
-int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                            const AVSubtitle *sub);
-
-int avcodec_close(AVCodecContext *avctx);
-
-/**
- * Register all the codecs, parsers and bitstream filters which were enabled at
- * configuration time. If you do not call this function you can select exactly
- * which formats you want to support, by using the individual registration
- * functions.
- *
- * @see avcodec_register
- * @see av_register_codec_parser
- * @see av_register_bitstream_filter
- */
-void avcodec_register_all(void);
-
-/**
- * Flush buffers, should be called when seeking or when switching to a different stream.
- */
-void avcodec_flush_buffers(AVCodecContext *avctx);
-
-void avcodec_default_free_buffers(AVCodecContext *s);
-
-/* misc useful functions */
-
-/**
- * Returns a single letter to describe the given picture type \p pict_type.
- *
- * @param[in] pict_type the picture type
- * @return A single character representing the picture type.
- */
-char av_get_pict_type_char(int pict_type);
-
-/**
- * Returns codec bits per sample.
- *
- * @param[in] codec_id the codec
- * @return Number of bits per sample or zero if unknown for the given codec.
- */
-int av_get_bits_per_sample(enum CodecID codec_id);
-
-/**
- * Returns sample format bits per sample.
- *
- * @param[in] sample_fmt the sample format
- * @return Number of bits per sample or zero if unknown for the given sample format.
- */
-int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
-
-/* frame parsing */
-typedef struct AVCodecParserContext {
-    void *priv_data;
-    struct AVCodecParser *parser;
-    int64_t frame_offset; /* offset of the current frame */
-    int64_t cur_offset; /* current offset
-                           (incremented by each av_parser_parse()) */
-    int64_t next_frame_offset; /* offset of the next frame */
-    /* video info */
-    int pict_type; /* XXX: Put it back in AVCodecContext. */
-    /**
-     * This field is used for proper frame duration computation in lavf.
-     * It signals, how much longer the frame duration of the current frame
-     * is compared to normal frame duration.
-     *
-     * frame_duration = (1 + repeat_pict) * time_base
-     *
-     * It is used by codecs like H.264 to display telecined material.
-     */
-    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
-    int64_t pts;     /* pts of the current frame */
-    int64_t dts;     /* dts of the current frame */
-
-    /* private data */
-    int64_t last_pts;
-    int64_t last_dts;
-    int fetch_timestamp;
-
-#define AV_PARSER_PTS_NB 4
-    int cur_frame_start_index;
-    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
-    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
-    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
-
-    int flags;
-#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
-
-    int64_t offset;      ///< byte offset from starting packet start
-    int64_t cur_frame_end[AV_PARSER_PTS_NB];
-
-    /*!
-     * Set by parser to 1 for key frames and 0 for non-key frames.
-     * It is initialized to -1, so if the parser doesn't set this flag,
-     * old-style fallback using FF_I_TYPE picture type as key frames
-     * will be used.
-     */
-    int key_frame;
-
-    /**
-     * Time difference in stream time base units from the pts of this
-     * packet to the point at which the output from the decoder has converged
-     * independent from the availability of previous frames. That is, the
-     * frames are virtually identical no matter if decoding started from
-     * the very first frame or from this keyframe.
-     * Is AV_NOPTS_VALUE if unknown.
-     * This field is not the display duration of the current frame.
-     *
-     * The purpose of this field is to allow seeking in streams that have no
-     * keyframes in the conventional sense. It corresponds to the
-     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
-     * essential for some types of subtitle streams to ensure that all
-     * subtitles are correctly displayed after seeking.
-     */
-    int64_t convergence_duration;
-
-    // Timestamp generation support:
-    /**
-     * Synchronization point for start of timestamp generation.
-     *
-     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
-     * (default).
-     *
-     * For example, this corresponds to presence of H.264 buffering period
-     * SEI message.
-     */
-    int dts_sync_point;
-
-    /**
-     * Offset of the current timestamp against last timestamp sync point in
-     * units of AVCodecContext.time_base.
-     *
-     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
-     * contain a valid timestamp offset.
-     *
-     * Note that the timestamp of sync point has usually a nonzero
-     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
-     * the next frame after timestamp sync point will be usually 1.
-     *
-     * For example, this corresponds to H.264 cpb_removal_delay.
-     */
-    int dts_ref_dts_delta;
-
-    /**
-     * Presentation delay of current frame in units of AVCodecContext.time_base.
-     *
-     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
-     * contain valid non-negative timestamp delta (presentation time of a frame
-     * must not lie in the past).
-     *
-     * This delay represents the difference between decoding and presentation
-     * time of the frame.
-     *
-     * For example, this corresponds to H.264 dpb_output_delay.
-     */
-    int pts_dts_delta;
-
-    /**
-     * Position of the packet in file.
-     *
-     * Analogous to cur_frame_pts/dts
-     */
-    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
-
-    /**
-     * Byte position of currently parsed frame in stream.
-     */
-    int64_t pos;
-
-    /**
-     * Previous frame byte position.
-     */
-    int64_t last_pos;
-} AVCodecParserContext;
-
-typedef struct AVCodecParser {
-    int codec_ids[5]; /* several codec IDs are permitted */
-    int priv_data_size;
-    int (*parser_init)(AVCodecParserContext *s);
-    int (*parser_parse)(AVCodecParserContext *s,
-                        AVCodecContext *avctx,
-                        const uint8_t **poutbuf, int *poutbuf_size,
-                        const uint8_t *buf, int buf_size);
-    void (*parser_close)(AVCodecParserContext *s);
-    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
-    struct AVCodecParser *next;
-} AVCodecParser;
-
-AVCodecParser *av_parser_next(AVCodecParser *c);
-
-void av_register_codec_parser(AVCodecParser *parser);
-AVCodecParserContext *av_parser_init(int codec_id);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-attribute_deprecated
-int av_parser_parse(AVCodecParserContext *s,
-                    AVCodecContext *avctx,
-                    uint8_t **poutbuf, int *poutbuf_size,
-                    const uint8_t *buf, int buf_size,
-                    int64_t pts, int64_t dts);
-#endif
-
-/**
- * Parse a packet.
- *
- * @param s             parser context.
- * @param avctx         codec context.
- * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
- * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
- * @param buf           input buffer.
- * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
- * @param pts           input presentation timestamp.
- * @param dts           input decoding timestamp.
- * @param pos           input byte position in stream.
- * @return the number of bytes of the input bitstream used.
- *
- * Example:
- * @code
- *   while(in_len){
- *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
- *                                        in_data, in_len,
- *                                        pts, dts, pos);
- *       in_data += len;
- *       in_len  -= len;
- *
- *       if(size)
- *          decode_frame(data, size);
- *   }
- * @endcode
- */
-int av_parser_parse2(AVCodecParserContext *s,
-                     AVCodecContext *avctx,
-                     uint8_t **poutbuf, int *poutbuf_size,
-                     const uint8_t *buf, int buf_size,
-                     int64_t pts, int64_t dts,
-                     int64_t pos);
-
-int av_parser_change(AVCodecParserContext *s,
-                     AVCodecContext *avctx,
-                     uint8_t **poutbuf, int *poutbuf_size,
-                     const uint8_t *buf, int buf_size, int keyframe);
-void av_parser_close(AVCodecParserContext *s);
-
-
-typedef struct AVBitStreamFilterContext {
-    void *priv_data;
-    struct AVBitStreamFilter *filter;
-    AVCodecParserContext *parser;
-    struct AVBitStreamFilterContext *next;
-} AVBitStreamFilterContext;
-
-
-typedef struct AVBitStreamFilter {
-    const char *name;
-    int priv_data_size;
-    int (*filter)(AVBitStreamFilterContext *bsfc,
-                  AVCodecContext *avctx, const char *args,
-                  uint8_t **poutbuf, int *poutbuf_size,
-                  const uint8_t *buf, int buf_size, int keyframe);
-    void (*close)(AVBitStreamFilterContext *bsfc);
-    struct AVBitStreamFilter *next;
-} AVBitStreamFilter;
-
-void av_register_bitstream_filter(AVBitStreamFilter *bsf);
-AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
-int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
-                               AVCodecContext *avctx, const char *args,
-                               uint8_t **poutbuf, int *poutbuf_size,
-                               const uint8_t *buf, int buf_size, int keyframe);
-void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
-
-AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
-
-/* memory */
-
-/**
- * Reallocates the given block if it is not large enough, otherwise it
- * does nothing.
- *
- * @see av_realloc
- */
-void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
-
-/**
- * Allocates a buffer, reusing the given one if large enough.
- *
- * Contrary to av_fast_realloc the current buffer contents might not be
- * preserved and on error the old buffer is freed, thus no special
- * handling to avoid memleaks is necessary.
- *
- * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
- * @param size size of the buffer *ptr points to
- * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
- *                 *size 0 if an error occurred.
- */
-void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size);
-
-/**
- * Copy image 'src' to 'dst'.
- */
-void av_picture_copy(AVPicture *dst, const AVPicture *src,
-                     enum PixelFormat pix_fmt, int width, int height);
-
-/**
- * Crop image top and left side.
- */
-int av_picture_crop(AVPicture *dst, const AVPicture *src,
-                    enum PixelFormat pix_fmt, int top_band, int left_band);
-
-/**
- * Pad image.
- */
-int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
-            int padtop, int padbottom, int padleft, int padright, int *color);
-
-unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
-
-/**
- * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
- *
- * @return 0 in case of a successful parsing, a negative value otherwise
- * @param[in] str the string to parse: it has to be a string in the format
- * <width>x<height> or a valid video frame size abbreviation.
- * @param[in,out] width_ptr pointer to the variable which will contain the detected
- * frame width value
- * @param[in,out] height_ptr pointer to the variable which will contain the detected
- * frame height value
- */
-int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
-
-/**
- * Parses \p str and put in \p frame_rate the detected values.
- *
- * @return 0 in case of a successful parsing, a negative value otherwise
- * @param[in] str the string to parse: it has to be a string in the format
- * <frame_rate_num>/<frame_rate_den>, a float number or a valid video rate abbreviation
- * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
- * frame rate
- */
-int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
-
-/* error handling */
-#if EINVAL > 0
-#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
-#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
-#else
-/* Some platforms have E* and errno already negated. */
-#define AVERROR(e) (e)
-#define AVUNERROR(e) (e)
-#endif
-#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
-#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
-#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
-#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
-#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
-#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
-#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
-#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
-#define AVERROR_EOF         AVERROR(EPIPE)   /**< End of file. */
-#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
-
-/**
- * Registers the hardware accelerator \p hwaccel.
- */
-void av_register_hwaccel(AVHWAccel *hwaccel);
-
-/**
- * If hwaccel is NULL, returns the first registered hardware accelerator,
- * if hwaccel is non-NULL, returns the next registered hardware accelerator
- * after hwaccel, or NULL if hwaccel is the last one.
- */
-AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
-
-#endif /* AVCODEC_AVCODEC_H */