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3d0a39fa2d
FFmpeg/libavcodec/avcodec.h
Panagiotis Issaris 3d0a39fa2d Doxygenize the comments for the av_realloc_static() function. 
Originally committed as revision 8083 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-02-22 19:10:55 +00:00

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/*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_H
#define AVCODEC_H
/**
* @file avcodec.h
* external api header.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "avutil.h"
#include <sys/types.h> /* size_t */
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVCODEC_VERSION_INT ((51<<16)+(34<<8)+0)
#define LIBAVCODEC_VERSION 51.34.0
#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}
enum CodecID {
CODEC_ID_NONE,
CODEC_ID_MPEG1VIDEO,
CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 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,
/* 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,
/* 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,
/* 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,
CODEC_ID_MP2= 0x15000,
CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
CODEC_ID_AAC,
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
CODEC_ID_MPEG4AAC,
#endif
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 */
/* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000,
CODEC_ID_DVB_SUBTITLE,
CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
stream (only used by libavformat) */
};
/* CODEC_ID_MP3LAME is absolete */
#define CODEC_ID_MP3LAME CODEC_ID_MP3
enum CodecType {
CODEC_TYPE_UNKNOWN = -1,
CODEC_TYPE_VIDEO,
CODEC_TYPE_AUDIO,
CODEC_TYPE_DATA,
CODEC_TYPE_SUBTITLE,
};
/* currently unused, may be used if 24/32 bits samples ever supported */
/* all in native endian */
enum SampleFormat {
SAMPLE_FMT_NONE = -1,
SAMPLE_FMT_U8, ///< unsigned 8 bits
SAMPLE_FMT_S16, ///< signed 16 bits
SAMPLE_FMT_S24, ///< signed 24 bits
SAMPLE_FMT_S32, ///< signed 32 bits
SAMPLE_FMT_FLT, ///< float
};
/* 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, EPZS by default */
enum Motion_Est_ID {
ME_ZERO = 1,
ME_FULL,
ME_LOG,
ME_PHODS,
ME_EPZS,
ME_X1,
ME_HEX,
ME_UMH,
ME_ITER,
};
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
};
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 initing
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 H263
#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
/* parent program guarantees that the input for b-frame containing streams is not written to
for at least s->max_b_frames+1 frames, if this is not set than 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_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
#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_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
#define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 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 ///< H263 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 ((int)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 skiping
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Reference Picture Selection
* Independant 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 non zero delay and needs to be feeded with NULL at the end to get the delayed data.
* if this is not set, the codec is guaranteed to never be feeded 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
//the following defines may change, don't expect compatibility if you use them
#define MB_TYPE_INTRA4x4 0x0001
#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
#define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 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 lavc
*/
int id;
/**
* width and height in 1/16 pel
* - encoding: set by user.
* - decoding: set by lavc
*/
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 lavc
*/
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 lavc unless the default get/release_buffer() is used\
* - encoding: \
* - decoding: \
*/\
uint8_t *base[4];\
/**\
* 1 -> keyframe, 0-> not\
* - encoding: set by lavc\
* - decoding: set by lavc\
*/\
int key_frame;\
\
/**\
* picture type of the frame, see ?_TYPE below.\
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
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 lavc\
*/\
int64_t pts;\
\
/**\
* picture number in bitstream order.\
* - encoding: set by\
* - decoding: set by lavc\
*/\
int coded_picture_number;\
/**\
* picture number in display order.\
* - encoding: set by\
* - decoding: set by lavc\
*/\
int display_picture_number;\
\
/**\
* quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
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\
* - encoding: unused\
* - decoding: set by lavc (before get_buffer() call))\
*/\
int reference;\
\
/**\
* QP table\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int8_t *qscale_table;\
/**\
* QP store stride\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int qstride;\
\
/**\
* mbskip_table[mb]>=1 if MB didnt change\
* stride= mb_width = (width+15)>>4\
* - encoding: unused\
* - decoding: set by lavc\
*/\
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 lavc\
*/\
int16_t (*motion_val[2])[2];\
\
/**\
* Macroblock type table\
* mb_type_base + mb_width + 2\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
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 lavc\
*/\
uint8_t motion_subsample_log2;\
\
/**\
* for some private data of the user\
* - encoding: unused\
* - decoding: set by user\
*/\
void *opaque;\
\
/**\
* error\
* - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
* - decoding: unused\
*/\
uint64_t error[4];\
\
/**\
* type of the buffer (to keep track of who has to dealloc data[*])\
* - encoding: set by the one who allocs it\
* - decoding: set by the one who allocs it\
* Note: user allocated (direct rendering) & internal buffers can not coexist currently\
*/\
int type;\
\
/**\
* when decoding, this signal how much the picture must be delayed.\
* extra_delay = repeat_pict / (2*fps)\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int repeat_pict;\
\
/**\
* \
*/\
int qscale_type;\
\
/**\
* The content of the picture is interlaced.\
* - encoding: set by user\
* - decoding: set by lavc (default 0)\
*/\
int interlaced_frame;\
\
/**\
* if the content is interlaced, is top field displayed first.\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
int top_field_first;\
\
/**\
* Pan scan.\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
AVPanScan *pan_scan;\
\
/**\
* tell user application that palette has changed from previous frame.\
* - encoding: ??? (no palette-enabled encoder yet)\
* - decoding: set by lavc (default 0)\
*/\
int palette_has_changed;\
\
/**\
* Codec suggestion on buffer type if != 0\
* - encoding: unused\
* - decoding: set by lavc (before get_buffer() call))\
*/\
int buffer_hints;\
\
/**\
* DCT coeffitients\
* - encoding: unused\
* - decoding: set by lavc\
*/\
short *dct_coeff;\
\
/**\
* Motion referece frame index\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
int8_t *ref_index[2];
#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 dealloc 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 dealloc 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
#define FF_SP_TYPE 6
#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)
/**
* Audio Video Frame.
*/
typedef struct AVFrame {
FF_COMMON_FRAME
} AVFrame;
#define DEFAULT_FRAME_RATE_BASE 1001000
/**
* main external api structure.
*/
typedef struct AVCodecContext {
/**
* Info on struct for av_log
* - set by avcodec_alloc_context
*/
AVClass *av_class;
/**
* the average bitrate.
* - encoding: set by user. unused for constant quantizer encoding
* - decoding: set by lavc. 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 needs additionnal format info. It is stored here
* - encoding: set by user.
* - decoding: set by lavc. (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) [7, 8 are x264 specific, 9 is snow specific]
* - encoding: MUST be set by user.
* - decoding: unused
*/
int me_method;
/**
* some codecs need / can use extra-data 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
* then extradata_size to avoid prolems if its read with the bitstream reader
* the bytewise contents of extradata must not depend on the architecture or cpu endianness
* - encoding: set/allocated/freed by lavc.
* - 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 lavc.
*/
AVRational time_base;
/* video only */
/**
* picture width / height.
* - encoding: MUST be set by user.
* - decoding: set by lavc.
* Note, for compatibility its 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 pitures, 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 lavc.
*/
enum PixelFormat pix_fmt;
/**
* Frame rate emulation. If not zero 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 an horizontal band. It improve cache usage. Not
* all codecs can do that. You must check the codec capabilities
* before
* - 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 sec
int channels;
/**
* audio sample format.
* - encoding: set by user.
* - decoding: set by lavc.
*/
enum SampleFormat sample_fmt; ///< sample format, currenly unused
/* the following data should not be initialized */
/**
* samples per packet. initialized when calling 'init'
*/
int frame_size;
int frame_number; ///< audio or video frame number
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 lavc.
* - 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.
* - 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;
/* unused, FIXME remove*/
int rtp_mode;
int rtp_payload_size; /* The size of the RTP payload: the coder will */
/* do it's 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 transmited RTP payload */
/* The RTP callback: This function is called */
/* every time the encoder has a packet to send */
/* 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 lavc
* - 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 workaround some encoder bugs
* - encoding: set by user, if not then the default based on codec_id will be used
* - decoding: set by user, will be converted to upper case by lavc during init
*/
unsigned int codec_tag;
/**
* workaround 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 ///< workaround various bugs in microsofts broken decoders
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
/**
* luma single coeff 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 std (MPEG4, ...).
* - encoding: set by user
* - decoding: unused
*/
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 non standarized experimental things
/**
* qscale offset 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_offset;
/**
* error resilience higher values will detect more errors but may missdetect
* some more or less valid parts as errors.
* - encoding: unused
* - decoding: set by user
*/
int error_resilience;
#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 lavc
* 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
* - encoding: unused
* - decoding: set by lavc, user can override
*/
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
/**
* called to release buffers which where allocated with get_buffer.
* a released buffer can be reused in get_buffer()
* pic.data[*] must be set to NULL
* - encoding: unused
* - decoding: set by lavc, user can override
*/
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
/**
* if 1 the stream has a 1 frame delay during decoding.
* - encoding: set by lavc
* - decoding: set by lavc
*/
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 lavc
* - 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
*/
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;
/* for binary compatibility */
int unused;
/**
* 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
/**
* slice count.
* - encoding: set by lavc
* - decoding: set by user (or 0)
*/
int slice_count;
/**
* slice offsets in the frame in bytes.
* - encoding: set/allocated by lavc
* - 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 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 */
#ifdef HAVE_MMX
#define FF_MM_MMX 0x0001 /* standard MMX */
#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
#define FF_MM_MMXEXT 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 */
#endif /* HAVE_MMX */
#ifdef HAVE_IWMMXT
#define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
#endif /* HAVE_IWMMXT */
/**
* bits per sample/pixel from the demuxer (needed for huffyuv).
* - encoding: set by lavc
* - decoding: set by user
*/
int bits_per_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).
* numerator and denominator must be relative prime and smaller then 256 for some video standards
* - encoding: set by user.
* - decoding: set by lavc.
*/
AVRational sample_aspect_ratio;
/**
* the picture in the bitstream.
* - encoding: set by lavc
* - decoding: set by lavc
*/
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
/**
* 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 lavc 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 compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_cmp;
/**
* subpixel motion estimation compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_sub_cmp;
/**
* macroblock compare function (not supported yet).
* - encoding: set by user.
* - decoding: unused
*/
int mb_cmp;
/**
* interlaced dct compare 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;
/**
* pre pass for motion estimation.
* - encoding: set by user.
* - decoding: unused
*/
int pre_me;
/**
* motion estimation pre pass compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_pre_cmp;
/**
* ME pre pass 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,
* its terminated by -1 as 0 is a valid format, the formats are ordered by quality
* the first is allways the native one
* @return the choosen format
* - encoding: unused
* - decoding: set by user, if not set then the native format will always be choosen
*/
enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
/**
* DTG active format information (additionnal aspect ratio
* information only used in DVB MPEG2 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
* table have to be stored somewhere FIXME
*/
int color_table_id;
/**
* internal_buffer count.
* Don't touch, used by lavc default_get_buffer()
*/
int internal_buffer_count;
/**
* internal_buffers.
* Don't touch, used by lavc 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 MPEG1/2/4 qscale.
* - encoding: set by user.
* - decoding: unused
*/
int global_quality;
#define FF_CODER_TYPE_VLC 0
#define FF_CODER_TYPE_AC 1
/**
* 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 distoration
/**
* custom intra quantization matrix
* - encoding: set by user, can be NULL
* - decoding: set by lavc
*/
uint16_t *intra_matrix;
/**
* custom inter quantization matrix
* - encoding: set by user, can be NULL
* - decoding: set by lavc
*/
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 workaround some encoder bugs
* - encoding: unused
* - decoding: set by user, will be converted to upper case by lavc 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. lavc won't check it.
* lavc 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 lavc, 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 independant 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 independant 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 lavc, user can override
* - decoding: set by lavc, user can override
*/
int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
/**
* 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. under 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. under 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 lavc
*/
int profile;
#define FF_PROFILE_UNKNOWN -99
/**
* level
* - encoding: set by user
* - decoding: set by lavc
*/
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;
/**
* bitsream 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 comparission 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: unused
*/
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 /* Analyse i4x4 */
#define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
#define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
#define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
#define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
/**
* direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
* - encoding: set by user.
* - decoding: unused
*/
int directpred;
/**
* audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
* - 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 functin 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;
} AVCodecContext;
/**
* AVCodec.
*/
typedef struct AVCodec {
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,
uint8_t *buf, int buf_size);
int capabilities;
struct AVCodec *next;
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 terminanted by -1
} AVCodec;
/**
* 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;
/**
* AVPaletteControl
* This structure defines a method for communicating palette changes
* between and demuxer and a decoder.
* this is totally broken, palette changes should be sent as AVPackets
*/
#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 a 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;
typedef struct AVSubtitleRect {
uint16_t x;
uint16_t y;
uint16_t w;
uint16_t h;
uint16_t nb_colors;
int linesize;
uint32_t *rgba_palette;
uint8_t *bitmap;
} 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 */
uint32_t num_rects;
AVSubtitleRect *rects;
} AVSubtitle;
extern AVCodec ac3_encoder;
extern AVCodec amr_nb_encoder;
extern AVCodec amr_wb_encoder;
extern AVCodec asv1_encoder;
extern AVCodec asv2_encoder;
extern AVCodec bmp_encoder;
extern AVCodec dvvideo_encoder;
extern AVCodec faac_encoder;
extern AVCodec ffv1_encoder;
extern AVCodec ffvhuff_encoder;
extern AVCodec flac_encoder;
extern AVCodec flashsv_encoder;
extern AVCodec flv_encoder;
extern AVCodec gif_encoder;
extern AVCodec h261_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec h264_encoder;
extern AVCodec huffyuv_encoder;
extern AVCodec jpegls_encoder;
extern AVCodec libgsm_encoder;
extern AVCodec libgsm_ms_encoder;
extern AVCodec libtheora_encoder;
extern AVCodec ljpeg_encoder;
extern AVCodec mdec_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec mp2_encoder;
extern AVCodec mp3lame_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec mpeg2video_encoder;
extern AVCodec mpeg4_encoder;
extern AVCodec msmpeg4v1_encoder;
extern AVCodec msmpeg4v2_encoder;
extern AVCodec msmpeg4v3_encoder;
extern AVCodec oggvorbis_encoder;
extern AVCodec pam_encoder;
extern AVCodec pbm_encoder;
extern AVCodec pgm_encoder;
extern AVCodec pgmyuv_encoder;
extern AVCodec png_encoder;
extern AVCodec ppm_encoder;
extern AVCodec rv10_encoder;
extern AVCodec rv20_encoder;
extern AVCodec snow_encoder;
extern AVCodec sonic_encoder;
extern AVCodec sonic_ls_encoder;
extern AVCodec svq1_encoder;
extern AVCodec vcr1_encoder;
extern AVCodec vorbis_encoder;
extern AVCodec wmav1_encoder;
extern AVCodec wmav2_encoder;
extern AVCodec wmv1_encoder;
extern AVCodec wmv2_encoder;
extern AVCodec x264_encoder;
extern AVCodec xvid_encoder;
extern AVCodec zlib_encoder;
extern AVCodec zmbv_encoder;
extern AVCodec aac_decoder;
extern AVCodec aasc_decoder;
extern AVCodec alac_decoder;
extern AVCodec amr_nb_decoder;
extern AVCodec amr_wb_decoder;
extern AVCodec asv1_decoder;
extern AVCodec asv2_decoder;
extern AVCodec avs_decoder;
extern AVCodec bmp_decoder;
extern AVCodec cavs_decoder;
extern AVCodec cinepak_decoder;
extern AVCodec cljr_decoder;
extern AVCodec cook_decoder;
extern AVCodec cscd_decoder;
extern AVCodec cyuv_decoder;
extern AVCodec dsicinaudio_decoder;
extern AVCodec dsicinvideo_decoder;
extern AVCodec dvvideo_decoder;
extern AVCodec eightbps_decoder;
extern AVCodec ffv1_decoder;
extern AVCodec ffvhuff_decoder;
extern AVCodec flac_decoder;
extern AVCodec flashsv_decoder;
extern AVCodec flic_decoder;
extern AVCodec flv_decoder;
extern AVCodec fourxm_decoder;
extern AVCodec fraps_decoder;
extern AVCodec gif_decoder;
extern AVCodec h261_decoder;
extern AVCodec h263_decoder;
extern AVCodec h263i_decoder;
extern AVCodec h264_decoder;
extern AVCodec huffyuv_decoder;
extern AVCodec idcin_decoder;
extern AVCodec imc_decoder;
extern AVCodec indeo2_decoder;
extern AVCodec indeo3_decoder;
extern AVCodec interplay_dpcm_decoder;
extern AVCodec interplay_video_decoder;
extern AVCodec kmvc_decoder;
extern AVCodec libgsm_decoder;
extern AVCodec libgsm_ms_decoder;
extern AVCodec loco_decoder;
extern AVCodec mace3_decoder;
extern AVCodec mace6_decoder;
extern AVCodec mdec_decoder;
extern AVCodec mjpeg_decoder;
extern AVCodec mjpegb_decoder;
extern AVCodec mmvideo_decoder;
extern AVCodec mp2_decoder;
extern AVCodec mp3_decoder;
extern AVCodec mp3adu_decoder;
extern AVCodec mp3on4_decoder;
extern AVCodec mpc7_decoder;
extern AVCodec mpeg1video_decoder;
extern AVCodec mpeg2video_decoder;
extern AVCodec mpeg4_decoder;
extern AVCodec mpeg4aac_decoder;
extern AVCodec mpeg_xvmc_decoder;
extern AVCodec mpegvideo_decoder;
extern AVCodec msmpeg4v1_decoder;
extern AVCodec msmpeg4v2_decoder;
extern AVCodec msmpeg4v3_decoder;
extern AVCodec msrle_decoder;
extern AVCodec msvideo1_decoder;
extern AVCodec mszh_decoder;
extern AVCodec nuv_decoder;
extern AVCodec oggvorbis_decoder;
extern AVCodec png_decoder;
extern AVCodec qdm2_decoder;
extern AVCodec qdraw_decoder;
extern AVCodec qpeg_decoder;
extern AVCodec qtrle_decoder;
extern AVCodec ra_144_decoder;
extern AVCodec ra_288_decoder;
extern AVCodec roq_decoder;
extern AVCodec roq_dpcm_decoder;
extern AVCodec rpza_decoder;
extern AVCodec rv10_decoder;
extern AVCodec rv20_decoder;
extern AVCodec rv30_decoder;
extern AVCodec rv40_decoder;
extern AVCodec shorten_decoder;
extern AVCodec smackaud_decoder;
extern AVCodec smacker_decoder;
extern AVCodec smc_decoder;
extern AVCodec snow_decoder;
extern AVCodec sol_dpcm_decoder;
extern AVCodec sonic_decoder;
extern AVCodec sp5x_decoder;
extern AVCodec svq1_decoder;
extern AVCodec svq3_decoder;
extern AVCodec targa_decoder;
extern AVCodec theora_decoder;
extern AVCodec tiertexseqvideo_decoder;
extern AVCodec tiff_decoder;
extern AVCodec truemotion1_decoder;
extern AVCodec truemotion2_decoder;
extern AVCodec truespeech_decoder;
extern AVCodec tscc_decoder;
extern AVCodec tta_decoder;
extern AVCodec ulti_decoder;
extern AVCodec vc1_decoder;
extern AVCodec vcr1_decoder;
extern AVCodec vmdaudio_decoder;
extern AVCodec vmdvideo_decoder;
extern AVCodec vmnc_decoder;
extern AVCodec vorbis_decoder;
extern AVCodec vp3_decoder;
extern AVCodec vp5_decoder;
extern AVCodec vp6_decoder;
extern AVCodec vp6f_decoder;
extern AVCodec vqa_decoder;
extern AVCodec wavpack_decoder;
extern AVCodec wmav1_decoder;
extern AVCodec wmav2_decoder;
extern AVCodec wmv1_decoder;
extern AVCodec wmv2_decoder;
extern AVCodec wmv3_decoder;
extern AVCodec wnv1_decoder;
extern AVCodec ws_snd1_decoder;
extern AVCodec xan_dpcm_decoder;
extern AVCodec xan_wc3_decoder;
extern AVCodec xl_decoder;
extern AVCodec zlib_decoder;
extern AVCodec zmbv_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \
extern AVCodec name ## _decoder; \
extern AVCodec name ## _encoder
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
/* adpcm codecs */
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
#undef PCM_CODEC
/* dummy raw video codec */
extern AVCodec rawvideo_decoder;
extern AVCodec rawvideo_encoder;
/* the following codecs use external GPL libs */
extern AVCodec dts_decoder;
extern AVCodec liba52_decoder;
/* subtitles */
extern AVCodec dvbsub_decoder;
extern AVCodec dvbsub_encoder;
extern AVCodec dvdsub_decoder;
extern AVCodec dvdsub_encoder;
/* resample.c */
struct ReSampleContext;
struct AVResampleContext;
typedef struct ReSampleContext ReSampleContext;
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
int output_rate, int input_rate);
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
void audio_resample_close(ReSampleContext *s);
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
void av_resample_close(struct AVResampleContext *c);
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
/* YUV420 format is assumed ! */
struct ImgReSampleContext attribute_deprecated;
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
int input_width, int input_height);
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
int iwidth, int iheight,
int topBand, int bottomBand,
int leftBand, int rightBand,
int padtop, int padbottom,
int padleft, int padright);
attribute_deprecated void img_resample(ImgReSampleContext *s,
AVPicture *output, const AVPicture *input);
attribute_deprecated void img_resample_close(ImgReSampleContext *s);
#endif
/**
* 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, int 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);
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
int pix_fmt, int width, int height);
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
unsigned char *dest, int dest_size);
int avpicture_get_size(int pix_fmt, int width, int height);
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
const char *avcodec_get_pix_fmt_name(int pix_fmt);
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
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) */
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
int has_alpha);
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
int has_alpha, int *loss_ptr);
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
int img_get_alpha_info(const AVPicture *src,
int pix_fmt, int width, int height);
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
/* convert among pixel formats */
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
const AVPicture *src, int pix_fmt,
int width, int height);
#endif
/* deinterlace a picture */
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height);
/* external high level API */
extern AVCodec *first_avcodec;
/* returns LIBAVCODEC_VERSION_INT constant */
unsigned avcodec_version(void);
/* returns LIBAVCODEC_BUILD constant */
unsigned avcodec_build(void);
/**
* Initializes libavcodec.
*
* @warning This function \e must be called before any other libavcodec
* function.
*/
void avcodec_init(void);
void register_avcodec(AVCodec *format);
/**
* Finds an 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 an 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 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 an 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);
/**
* 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);
/**
* 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 avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
//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 save!
*
* @code
* 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 setup 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);
/**
* @deprecated Use avcodec_decode_audio2() instead.
*/
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
uint8_t *buf, int buf_size);
/**
* Decodes an audio frame from \p buf into \p samples.
* The avcodec_decode_audio2() function decodes a frame of audio from the input
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
* audiocodec which was coupled with \p avctx using avcodec_open(). The
* resulting decoded frame is stored in output buffer \p samples. 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_audio2().
*
* @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 buf 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] 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.
*/
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
uint8_t *buf, int buf_size);
/**
* Decodes a video frame from \p buf into \p picture.
* The avcodec_decode_video() function decodes a frame of video from the input
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
* videocodec which was coupled with \p avctx using avcodec_open(). The
* resulting decoded frame is stored in \p picture.
*
* @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 buf 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] 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 non zero.
* @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_video(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
uint8_t *buf, int buf_size);
/* 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. */
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
const uint8_t *buf, int buf_size);
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.
* The avcodec_encode_audio() function encodes a frame of audio from the input
* buffer \p samples. To encode it, it makes use of the audiocodec which was
* coupled with \p avctx using avcodec_open(). The resulting encoded frame is
* stored in output buffer \p buf.
*
* @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
*
* @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.
* @return On error a negative value is returned, on succes zero or the number
* of bytes used 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 avcodec_encode_video() function encodes a frame of video from the input
* \p pict. To encode it, it makes use of the videocodec which was coupled with
* \p avctx using avcodec_open(). The resulting encoded bytes representing the
* frame are stored in the output buffer \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 outputbuffer 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 input 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);
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);
/* 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 last_frame_offset; /* offset of the last frame */
/* video info */
int pict_type; /* XXX: put it back in AVCodecContext */
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
} 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,
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;
extern AVCodecParser *av_first_parser;
void av_register_codec_parser(AVCodecParser *parser);
AVCodecParserContext *av_parser_init(int codec_id);
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);
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);
extern AVCodecParser aac_parser;
extern AVCodecParser ac3_parser;
extern AVCodecParser cavsvideo_parser;
extern AVCodecParser dvbsub_parser;
extern AVCodecParser dvdsub_parser;
extern AVCodecParser h261_parser;
extern AVCodecParser h263_parser;
extern AVCodecParser h264_parser;
extern AVCodecParser mjpeg_parser;
extern AVCodecParser mpeg4video_parser;
extern AVCodecParser mpegaudio_parser;
extern AVCodecParser mpegvideo_parser;
extern AVCodecParser pnm_parser;
extern AVCodecParser vc1_parser;
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);
struct AVBitStreamFilter *next;
} AVBitStreamFilter;
extern AVBitStreamFilter *av_first_bitstream_filter;
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);
extern AVBitStreamFilter dump_extradata_bsf;
extern AVBitStreamFilter remove_extradata_bsf;
extern AVBitStreamFilter noise_bsf;
extern AVBitStreamFilter mp3_header_compress_bsf;
extern AVBitStreamFilter mp3_header_decompress_bsf;
extern AVBitStreamFilter mjpega_dump_header_bsf;
/* memory */
/**
* realloc which does nothing if the block is large enough
*/
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
/* for static data only */
/**
* free all static arrays and reset pointers to 0.
* call av_free_static to release all staticaly allocated tables
*/
void av_free_static(void);
/**
* allocation of static arrays - do not use for normal allocation.
*/
void *av_mallocz_static(unsigned int size);
/**
* Same as av_mallocz_static(), but does a realloc.
*
* @param[in] ptr The block of memory to reallocate.
* @param[in] size The requested size.
* @return Block of memory of requested size.
*/
void *av_realloc_static(void *ptr, unsigned int size);
void img_copy(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height);
int img_crop(AVPicture *dst, const AVPicture *src,
int pix_fmt, int top_band, int left_band);
int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
int padtop, int padbottom, int padleft, int padright, int *color);
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
/* 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 */
#ifdef __cplusplus
}
#endif
#endif /* AVCODEC_H */
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