libavcodec/avcodec.h

   1 #ifndef AVCODEC_H
   2 #define AVCODEC_H
   3
   4 /**
   5  * @file avcodec.h
   6  * external api header.
   7  */
   8
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 #include "avutil.h"
  15 #include <sys/types.h> /* size_t */
  16
  17 //FIXME the following 2 really dont belong in here
  18 #define FFMPEG_VERSION_INT      0x000409
  19 #define FFMPEG_VERSION          "CVS"
  20
  21 #define AV_STRINGIFY(s)         AV_TOSTRING(s)
  22 #define AV_TOSTRING(s) #s
  23
  24 #define LIBAVCODEC_VERSION_INT  ((51<<16)+(1<<8)+0)
  25 #define LIBAVCODEC_VERSION      51.1.0
  26 #define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
  27
  28 #define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
  29
  30 #define AV_NOPTS_VALUE          int64_t_C(0x8000000000000000)
  31 #define AV_TIME_BASE            1000000
  32 #define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
  33
  34 enum CodecID {
  35     CODEC_ID_NONE,
  36     CODEC_ID_MPEG1VIDEO,
  37     CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
  38     CODEC_ID_MPEG2VIDEO_XVMC,
  39     CODEC_ID_H261,
  40     CODEC_ID_H263,
  41     CODEC_ID_RV10,
  42     CODEC_ID_RV20,
  43     CODEC_ID_MJPEG,
  44     CODEC_ID_MJPEGB,
  45     CODEC_ID_LJPEG,
  46     CODEC_ID_SP5X,
  47     CODEC_ID_JPEGLS,
  48     CODEC_ID_MPEG4,
  49     CODEC_ID_RAWVIDEO,
  50     CODEC_ID_MSMPEG4V1,
  51     CODEC_ID_MSMPEG4V2,
  52     CODEC_ID_MSMPEG4V3,
  53     CODEC_ID_WMV1,
  54     CODEC_ID_WMV2,
  55     CODEC_ID_H263P,
  56     CODEC_ID_H263I,
  57     CODEC_ID_FLV1,
  58     CODEC_ID_SVQ1,
  59     CODEC_ID_SVQ3,
  60     CODEC_ID_DVVIDEO,
  61     CODEC_ID_HUFFYUV,
  62     CODEC_ID_CYUV,
  63     CODEC_ID_H264,
  64     CODEC_ID_INDEO3,
  65     CODEC_ID_VP3,
  66     CODEC_ID_THEORA,
  67     CODEC_ID_ASV1,
  68     CODEC_ID_ASV2,
  69     CODEC_ID_FFV1,
  70     CODEC_ID_4XM,
  71     CODEC_ID_VCR1,
  72     CODEC_ID_CLJR,
  73     CODEC_ID_MDEC,
  74     CODEC_ID_ROQ,
  75     CODEC_ID_INTERPLAY_VIDEO,
  76     CODEC_ID_XAN_WC3,
  77     CODEC_ID_XAN_WC4,
  78     CODEC_ID_RPZA,
  79     CODEC_ID_CINEPAK,
  80     CODEC_ID_WS_VQA,
  81     CODEC_ID_MSRLE,
  82     CODEC_ID_MSVIDEO1,
  83     CODEC_ID_IDCIN,
  84     CODEC_ID_8BPS,
  85     CODEC_ID_SMC,
  86     CODEC_ID_FLIC,
  87     CODEC_ID_TRUEMOTION1,
  88     CODEC_ID_VMDVIDEO,
  89     CODEC_ID_MSZH,
  90     CODEC_ID_ZLIB,
  91     CODEC_ID_QTRLE,
  92     CODEC_ID_SNOW,
  93     CODEC_ID_TSCC,
  94     CODEC_ID_ULTI,
  95     CODEC_ID_QDRAW,
  96     CODEC_ID_VIXL,
  97     CODEC_ID_QPEG,
  98     CODEC_ID_XVID,
  99     CODEC_ID_PNG,
 100     CODEC_ID_PPM,
 101     CODEC_ID_PBM,
 102     CODEC_ID_PGM,
 103     CODEC_ID_PGMYUV,
 104     CODEC_ID_PAM,
 105     CODEC_ID_FFVHUFF,
 106     CODEC_ID_RV30,
 107     CODEC_ID_RV40,
 108     CODEC_ID_VC9,
 109     CODEC_ID_WMV3,
 110     CODEC_ID_LOCO,
 111     CODEC_ID_WNV1,
 112     CODEC_ID_AASC,
 113     CODEC_ID_INDEO2,
 114     CODEC_ID_FRAPS,
 115     CODEC_ID_TRUEMOTION2,
 116     CODEC_ID_BMP,
 117     CODEC_ID_CSCD,
 118
 119     /* various pcm "codecs" */
 120     CODEC_ID_PCM_S16LE= 0x10000,
 121     CODEC_ID_PCM_S16BE,
 122     CODEC_ID_PCM_U16LE,
 123     CODEC_ID_PCM_U16BE,
 124     CODEC_ID_PCM_S8,
 125     CODEC_ID_PCM_U8,
 126     CODEC_ID_PCM_MULAW,
 127     CODEC_ID_PCM_ALAW,
 128     CODEC_ID_PCM_S32LE,
 129     CODEC_ID_PCM_S32BE,
 130     CODEC_ID_PCM_U32LE,
 131     CODEC_ID_PCM_U32BE,
 132     CODEC_ID_PCM_S24LE,
 133     CODEC_ID_PCM_S24BE,
 134     CODEC_ID_PCM_U24LE,
 135     CODEC_ID_PCM_U24BE,
 136     CODEC_ID_PCM_S24DAUD,
 137
 138     /* various adpcm codecs */
 139     CODEC_ID_ADPCM_IMA_QT= 0x11000,
 140     CODEC_ID_ADPCM_IMA_WAV,
 141     CODEC_ID_ADPCM_IMA_DK3,
 142     CODEC_ID_ADPCM_IMA_DK4,
 143     CODEC_ID_ADPCM_IMA_WS,
 144     CODEC_ID_ADPCM_IMA_SMJPEG,
 145     CODEC_ID_ADPCM_MS,
 146     CODEC_ID_ADPCM_4XM,
 147     CODEC_ID_ADPCM_XA,
 148     CODEC_ID_ADPCM_ADX,
 149     CODEC_ID_ADPCM_EA,
 150     CODEC_ID_ADPCM_G726,
 151     CODEC_ID_ADPCM_CT,
 152     CODEC_ID_ADPCM_SWF,
 153     CODEC_ID_ADPCM_YAMAHA,
 154
 155     /* AMR */
 156     CODEC_ID_AMR_NB= 0x12000,
 157     CODEC_ID_AMR_WB,
 158
 159     /* RealAudio codecs*/
 160     CODEC_ID_RA_144= 0x13000,
 161     CODEC_ID_RA_288,
 162
 163     /* various DPCM codecs */
 164     CODEC_ID_ROQ_DPCM= 0x14000,
 165     CODEC_ID_INTERPLAY_DPCM,
 166     CODEC_ID_XAN_DPCM,
 167     CODEC_ID_SOL_DPCM,
 168
 169     CODEC_ID_MP2= 0x15000,
 170     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
 171     CODEC_ID_AAC,
 172     CODEC_ID_MPEG4AAC,
 173     CODEC_ID_AC3,
 174     CODEC_ID_DTS,
 175     CODEC_ID_VORBIS,
 176     CODEC_ID_DVAUDIO,
 177     CODEC_ID_WMAV1,
 178     CODEC_ID_WMAV2,
 179     CODEC_ID_MACE3,
 180     CODEC_ID_MACE6,
 181     CODEC_ID_VMDAUDIO,
 182     CODEC_ID_SONIC,
 183     CODEC_ID_SONIC_LS,
 184     CODEC_ID_FLAC,
 185     CODEC_ID_MP3ADU,
 186     CODEC_ID_MP3ON4,
 187     CODEC_ID_SHORTEN,
 188     CODEC_ID_ALAC,
 189     CODEC_ID_WESTWOOD_SND1,
 190     CODEC_ID_GSM,
 191     CODEC_ID_QDM2,
 192     CODEC_ID_COOK,
 193     CODEC_ID_TRUESPEECH,
 194
 195     CODEC_ID_OGGTHEORA= 0x16000,
 196
 197     /* subtitle codecs */
 198     CODEC_ID_DVD_SUBTITLE= 0x17000,
 199     CODEC_ID_DVB_SUBTITLE,
 200
 201     CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
 202                          stream (only used by libavformat) */
 203 };
 204
 205 /* CODEC_ID_MP3LAME is absolete */
 206 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 207
 208 enum CodecType {
 209     CODEC_TYPE_UNKNOWN = -1,
 210     CODEC_TYPE_VIDEO,
 211     CODEC_TYPE_AUDIO,
 212     CODEC_TYPE_DATA,
 213     CODEC_TYPE_SUBTITLE,
 214 };
 215
 216 /**
 217  * Pixel format. Notes:
 218  *
 219  * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
 220  * color is put together as:
 221  *  (A << 24) | (R << 16) | (G << 8) | B
 222  * This is stored as BGRA on little endian CPU architectures and ARGB on
 223  * big endian CPUs.
 224  *
 225  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
 226  * image data is stored in AVFrame.data[0]. The palette is transported in
 227  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
 228  * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
 229  * also endian-specific). Note also that the individual RGB palette
 230  * components stored in AVFrame.data[1] should be in the range 0..255.
 231  * This is important as many custom PAL8 video codecs that were designed
 232  * to run on the IBM VGA graphics adapter use 6-bit palette components.
 233  */
 234 enum PixelFormat {
 235     PIX_FMT_NONE= -1,
 236     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
 237     PIX_FMT_YUV422,    ///< Packed pixel, Y0 Cb Y1 Cr
 238     PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
 239     PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
 240     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
 241     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
 242     PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
 243     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
 244     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
 245     PIX_FMT_RGB565,    ///< always stored in cpu endianness
 246     PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
 247     PIX_FMT_GRAY8,
 248     PIX_FMT_MONOWHITE, ///< 0 is white
 249     PIX_FMT_MONOBLACK, ///< 0 is black
 250     PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
 251     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
 252     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
 253     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
 254     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
 255     PIX_FMT_XVMC_MPEG2_IDCT,
 256     PIX_FMT_UYVY422,   ///< Packed pixel, Cb Y0 Cr Y1
 257     PIX_FMT_UYVY411,   ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
 258     PIX_FMT_NB,
 259 };
 260
 261 /* currently unused, may be used if 24/32 bits samples ever supported */
 262 enum SampleFormat {
 263     SAMPLE_FMT_S16 = 0,         ///< signed 16 bits
 264     SAMPLE_FMT_S32,             ///< signed 32 bits
 265     SAMPLE_FMT_FLT,             ///< float
 266     SAMPLE_FMT_DBL,             ///< double
 267 };
 268
 269 /* in bytes */
 270 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
 271
 272 /**
 273  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 274  * this is mainly needed because some optimized bitstream readers read
 275  * 32 or 64 bit at once and could read over the end<br>
 276  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 277  * MPEG bitstreams could cause overread and segfault
 278  */
 279 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 280
 281 /**
 282  * minimum encoding buffer size.
 283  * used to avoid some checks during header writing
 284  */
 285 #define FF_MIN_BUFFER_SIZE 16384
 286
 287 /* motion estimation type, EPZS by default */
 288 enum Motion_Est_ID {
 289     ME_ZERO = 1,
 290     ME_FULL,
 291     ME_LOG,
 292     ME_PHODS,
 293     ME_EPZS,
 294     ME_X1,
 295     ME_HEX,
 296     ME_UMH,
 297     ME_ITER,
 298 };
 299
 300 enum AVDiscard{
 301 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
 302     AVDISCARD_NONE   =-16, ///< discard nothing
 303     AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
 304     AVDISCARD_NONREF =  8, ///< discard all non reference
 305     AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
 306     AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
 307     AVDISCARD_ALL    = 48, ///< discard all
 308 };
 309
 310 typedef struct RcOverride{
 311     int start_frame;
 312     int end_frame;
 313     int qscale; // if this is 0 then quality_factor will be used instead
 314     float quality_factor;
 315 } RcOverride;
 316
 317 /* only for ME compatiblity with old apps */
 318 extern int motion_estimation_method;
 319
 320 #define FF_MAX_B_FRAMES 8
 321
 322 /* encoding support
 323    these flags can be passed in AVCodecContext.flags before initing
 324    Note: not everything is supported yet.
 325 */
 326
 327 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 328 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
 329 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 330 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 331 #define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0>
 332 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 333 /* parent program gurantees that the input for b-frame containing streams is not written to
 334    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 335 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 336 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 337 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 338 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 339 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 340 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
 341 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 342 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 343                                             of only at frame boundaries */
 344 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 345 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 346 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 347 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 348 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 349 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 350 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 351 /* Fx : Flag for h263+ extra options */
 352 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
 353 #define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
 354 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 355 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 356 #define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
 357 #define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
 358 #define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
 359 #define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
 360 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 361 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
 362 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
 363 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 364 #define CODEC_FLAG2_FAST          0x00000001 ///< allow non spec compliant speedup tricks
 365 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< strictly enforce GOP size
 366 #define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< skip bitstream encoding
 367 #define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< place global headers at every keyframe instead of in extradata
 368 #define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow b-frames to be used as references
 369 #define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for b-frames
 370 #define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 multiple references per partition
 371 #define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
 372 #define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
 373 #define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
 374 #define CODEC_FLAG2_BRDO          0x00000400 ///< b-frame rate-distortion optimization
 375
 376 /* Unsupported options :
 377  *              Syntax Arithmetic coding (SAC)
 378  *              Reference Picture Selection
 379  *              Independant Segment Decoding */
 380 /* /Fx */
 381 /* codec capabilities */
 382
 383 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 384 /**
 385  * Codec uses get_buffer() for allocating buffers.
 386  * direct rendering method 1
 387  */
 388 #define CODEC_CAP_DR1             0x0002
 389 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 390    used */
 391 #define CODEC_CAP_PARSE_ONLY      0x0004
 392 #define CODEC_CAP_TRUNCATED       0x0008
 393 /* codec can export data for HW decoding (XvMC) */
 394 #define CODEC_CAP_HWACCEL         0x0010
 395 /**
 396  * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
 397  * if this is not set, the codec is guranteed to never be feeded with NULL data
 398  */
 399 #define CODEC_CAP_DELAY           0x0020
 400
 401 //the following defines may change, don't expect compatibility if you use them
 402 #define MB_TYPE_INTRA4x4   0x0001
 403 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
 404 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
 405 #define MB_TYPE_16x16      0x0008
 406 #define MB_TYPE_16x8       0x0010
 407 #define MB_TYPE_8x16       0x0020
 408 #define MB_TYPE_8x8        0x0040
 409 #define MB_TYPE_INTERLACED 0x0080
 410 #define MB_TYPE_DIRECT2     0x0100 //FIXME
 411 #define MB_TYPE_ACPRED     0x0200
 412 #define MB_TYPE_GMC        0x0400
 413 #define MB_TYPE_SKIP       0x0800
 414 #define MB_TYPE_P0L0       0x1000
 415 #define MB_TYPE_P1L0       0x2000
 416 #define MB_TYPE_P0L1       0x4000
 417 #define MB_TYPE_P1L1       0x8000
 418 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 419 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 420 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 421 #define MB_TYPE_QUANT      0x00010000
 422 #define MB_TYPE_CBP        0x00020000
 423 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
 424
 425 /**
 426  * Pan Scan area.
 427  * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
 428  */
 429 typedef struct AVPanScan{
 430     /**
 431      * id.
 432      * - encoding: set by user.
 433      * - decoding: set by lavc
 434      */
 435     int id;
 436
 437     /**
 438      * width and height in 1/16 pel
 439      * - encoding: set by user.
 440      * - decoding: set by lavc
 441      */
 442     int width;
 443     int height;
 444
 445     /**
 446      * position of the top left corner in 1/16 pel for up to 3 fields/frames.
 447      * - encoding: set by user.
 448      * - decoding: set by lavc
 449      */
 450     int16_t position[3][2];
 451 }AVPanScan;
 452
 453 #define FF_COMMON_FRAME \
 454     /**\
 455      * pointer to the picture planes.\
 456      * this might be different from the first allocated byte\
 457      * - encoding: \
 458      * - decoding: \
 459      */\
 460     uint8_t *data[4];\
 461     int linesize[4];\
 462     /**\
 463      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 464      * this isn't used by lavc unless the default get/release_buffer() is used\
 465      * - encoding: \
 466      * - decoding: \
 467      */\
 468     uint8_t *base[4];\
 469     /**\
 470      * 1 -> keyframe, 0-> not\
 471      * - encoding: set by lavc\
 472      * - decoding: set by lavc\
 473      */\
 474     int key_frame;\
 475 \
 476     /**\
 477      * picture type of the frame, see ?_TYPE below.\
 478      * - encoding: set by lavc for coded_picture (and set by user for input)\
 479      * - decoding: set by lavc\
 480      */\
 481     int pict_type;\
 482 \
 483     /**\
 484      * presentation timestamp in time_base units (time when frame should be shown to user)\
 485      * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
 486      * - encoding: MUST be set by user\
 487      * - decoding: set by lavc\
 488      */\
 489     int64_t pts;\
 490 \
 491     /**\
 492      * picture number in bitstream order.\
 493      * - encoding: set by\
 494      * - decoding: set by lavc\
 495      */\
 496     int coded_picture_number;\
 497     /**\
 498      * picture number in display order.\
 499      * - encoding: set by\
 500      * - decoding: set by lavc\
 501      */\
 502     int display_picture_number;\
 503 \
 504     /**\
 505      * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
 506      * - encoding: set by lavc for coded_picture (and set by user for input)\
 507      * - decoding: set by lavc\
 508      */\
 509     int quality; \
 510 \
 511     /**\
 512      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 513      * set to INT_MAX if the buffer has not been used yet \
 514      * - encoding: unused\
 515      * - decoding: MUST be set by get_buffer()\
 516      */\
 517     int age;\
 518 \
 519     /**\
 520      * is this picture used as reference\
 521      * - encoding: unused\
 522      * - decoding: set by lavc (before get_buffer() call))\
 523      */\
 524     int reference;\
 525 \
 526     /**\
 527      * QP table\
 528      * - encoding: unused\
 529      * - decoding: set by lavc\
 530      */\
 531     int8_t *qscale_table;\
 532     /**\
 533      * QP store stride\
 534      * - encoding: unused\
 535      * - decoding: set by lavc\
 536      */\
 537     int qstride;\
 538 \
 539     /**\
 540      * mbskip_table[mb]>=1 if MB didnt change\
 541      * stride= mb_width = (width+15)>>4\
 542      * - encoding: unused\
 543      * - decoding: set by lavc\
 544      */\
 545     uint8_t *mbskip_table;\
 546 \
 547     /**\
 548      * Motion vector table.\
 549      * @code\
 550      * example:\
 551      * int mv_sample_log2= 4 - motion_subsample_log2;\
 552      * int mb_width= (width+15)>>4;\
 553      * int mv_stride= (mb_width << mv_sample_log2) + 1;\
 554      * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
 555      * @endcode\
 556      * - encoding: set by user\
 557      * - decoding: set by lavc\
 558      */\
 559     int16_t (*motion_val[2])[2];\
 560 \
 561     /**\
 562      * Macroblock type table\
 563      * mb_type_base + mb_width + 2\
 564      * - encoding: set by user\
 565      * - decoding: set by lavc\
 566      */\
 567     uint32_t *mb_type;\
 568 \
 569     /**\
 570      * log2 of the size of the block which a single vector in motion_val represents: \
 571      * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
 572      * - encoding: unused\
 573      * - decoding: set by lavc\
 574      */\
 575     uint8_t motion_subsample_log2;\
 576 \
 577     /**\
 578      * for some private data of the user\
 579      * - encoding: unused\
 580      * - decoding: set by user\
 581      */\
 582     void *opaque;\
 583 \
 584     /**\
 585      * error\
 586      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 587      * - decoding: unused\
 588      */\
 589     uint64_t error[4];\
 590 \
 591     /**\
 592      * type of the buffer (to keep track of who has to dealloc data[*])\
 593      * - encoding: set by the one who allocs it\
 594      * - decoding: set by the one who allocs it\
 595      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 596      */\
 597     int type;\
 598     \
 599     /**\
 600      * when decoding, this signal how much the picture must be delayed.\
 601      * extra_delay = repeat_pict / (2*fps)\
 602      * - encoding: unused\
 603      * - decoding: set by lavc\
 604      */\
 605     int repeat_pict;\
 606     \
 607     /**\
 608      * \
 609      */\
 610     int qscale_type;\
 611     \
 612     /**\
 613      * The content of the picture is interlaced.\
 614      * - encoding: set by user\
 615      * - decoding: set by lavc (default 0)\
 616      */\
 617     int interlaced_frame;\
 618     \
 619     /**\
 620      * if the content is interlaced, is top field displayed first.\
 621      * - encoding: set by user\
 622      * - decoding: set by lavc\
 623      */\
 624     int top_field_first;\
 625     \
 626     /**\
 627      * Pan scan.\
 628      * - encoding: set by user\
 629      * - decoding: set by lavc\
 630      */\
 631     AVPanScan *pan_scan;\
 632     \
 633     /**\
 634      * tell user application that palette has changed from previous frame.\
 635      * - encoding: ??? (no palette-enabled encoder yet)\
 636      * - decoding: set by lavc (default 0)\
 637      */\
 638     int palette_has_changed;\
 639     \
 640     /**\
 641      * Codec suggestion on buffer type if != 0\
 642      * - encoding: unused\
 643      * - decoding: set by lavc (before get_buffer() call))\
 644      */\
 645     int buffer_hints;\
 646 \
 647     /**\
 648      * DCT coeffitients\
 649      * - encoding: unused\
 650      * - decoding: set by lavc\
 651      */\
 652     short *dct_coeff;\
 653 \
 654     /**\
 655      * Motion referece frame index\
 656      * - encoding: set by user\
 657      * - decoding: set by lavc\
 658      */\
 659     int8_t *ref_index[2];
 660
 661 #define FF_QSCALE_TYPE_MPEG1 0
 662 #define FF_QSCALE_TYPE_MPEG2 1
 663 #define FF_QSCALE_TYPE_H264  2
 664
 665 #define FF_BUFFER_TYPE_INTERNAL 1
 666 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 667 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
 668 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
 669
 670
 671 #define FF_I_TYPE 1 // Intra
 672 #define FF_P_TYPE 2 // Predicted
 673 #define FF_B_TYPE 3 // Bi-dir predicted
 674 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 675 #define FF_SI_TYPE 5
 676 #define FF_SP_TYPE 6
 677
 678 #define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
 679 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
 680 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
 681 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
 682
 683 /**
 684  * Audio Video Frame.
 685  */
 686 typedef struct AVFrame {
 687     FF_COMMON_FRAME
 688 } AVFrame;
 689
 690 #define DEFAULT_FRAME_RATE_BASE 1001000
 691
 692 /**
 693  * Used by av_log
 694  */
 695 typedef struct AVCLASS AVClass;
 696 struct AVCLASS {
 697     const char* class_name;
 698     const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
 699                                         or AVFormatContext, which begin with an AVClass.
 700                                         Needed because av_log is in libavcodec and has no visibility
 701                                         of AVIn/OutputFormat */
 702     struct AVOption *option;
 703 };
 704
 705 /**
 706  * main external api structure.
 707  */
 708 typedef struct AVCodecContext {
 709     /**
 710      * Info on struct for av_log
 711      * - set by avcodec_alloc_context
 712      */
 713     AVClass *av_class;
 714     /**
 715      * the average bitrate.
 716      * - encoding: set by user. unused for constant quantizer encoding
 717      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 718      */
 719     int bit_rate;
 720
 721     /**
 722      * number of bits the bitstream is allowed to diverge from the reference.
 723      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 724      * - encoding: set by user. unused for constant quantizer encoding
 725      * - decoding: unused
 726      */
 727     int bit_rate_tolerance;
 728
 729     /**
 730      * CODEC_FLAG_*.
 731      * - encoding: set by user.
 732      * - decoding: set by user.
 733      */
 734     int flags;
 735
 736     /**
 737      * some codecs needs additionnal format info. It is stored here
 738      * - encoding: set by user.
 739      * - decoding: set by lavc. (FIXME is this ok?)
 740      */
 741     int sub_id;
 742
 743     /**
 744      * motion estimation algorithm used for video coding.
 745      * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
 746      * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
 747      * - encoding: MUST be set by user.
 748      * - decoding: unused
 749      */
 750     int me_method;
 751
 752     /**
 753      * some codecs need / can use extra-data like huffman tables.
 754      * mjpeg: huffman tables
 755      * rv10: additional flags
 756      * mpeg4: global headers (they can be in the bitstream or here)
 757      * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
 758      * then extradata_size to avoid prolems if its read with the bitstream reader
 759      * the bytewise contents of extradata must not depend on the architecture or cpu endianness
 760      * - encoding: set/allocated/freed by lavc.
 761      * - decoding: set/allocated/freed by user.
 762      */
 763     void *extradata;
 764     int extradata_size;
 765
 766     /**
 767      * this is the fundamental unit of time (in seconds) in terms
 768      * of which frame timestamps are represented. for fixed-fps content,
 769      * timebase should be 1/framerate and timestamp increments should be
 770      * identically 1.
 771      * - encoding: MUST be set by user
 772      * - decoding: set by lavc.
 773      */
 774     AVRational time_base;
 775
 776     /* video only */
 777     /**
 778      * picture width / height.
 779      * - encoding: MUST be set by user.
 780      * - decoding: set by lavc.
 781      * Note, for compatibility its possible to set this instead of
 782      * coded_width/height before decoding
 783      */
 784     int width, height;
 785
 786 #define FF_ASPECT_EXTENDED 15
 787
 788     /**
 789      * the number of pictures in a group of pitures, or 0 for intra_only.
 790      * - encoding: set by user.
 791      * - decoding: unused
 792      */
 793     int gop_size;
 794
 795     /**
 796      * pixel format, see PIX_FMT_xxx.
 797      * - encoding: set by user.
 798      * - decoding: set by lavc.
 799      */
 800     enum PixelFormat pix_fmt;
 801
 802     /**
 803      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 804      * has to read frames at native frame rate.
 805      * - encoding: set by user.
 806      * - decoding: unused.
 807      */
 808     int rate_emu;
 809
 810     /**
 811      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 812      * decoder to draw an horizontal band. It improve cache usage. Not
 813      * all codecs can do that. You must check the codec capabilities
 814      * before
 815      * - encoding: unused
 816      * - decoding: set by user.
 817      * @param height the height of the slice
 818      * @param y the y position of the slice
 819      * @param type 1->top field, 2->bottom field, 3->frame
 820      * @param offset offset into the AVFrame.data from which the slice should be read
 821      */
 822     void (*draw_horiz_band)(struct AVCodecContext *s,
 823                             const AVFrame *src, int offset[4],
 824                             int y, int type, int height);
 825
 826     /* audio only */
 827     int sample_rate; ///< samples per sec
 828     int channels;
 829
 830     /**
 831      * audio sample format.
 832      * - encoding: set by user.
 833      * - decoding: set by lavc.
 834      */
 835     enum SampleFormat sample_fmt;  ///< sample format, currenly unused
 836
 837     /* the following data should not be initialized */
 838     /**
 839      * samples per packet. initialized when calling 'init'
 840      */
 841     int frame_size;
 842     int frame_number;   ///< audio or video frame number
 843     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 844
 845     /**
 846      * number of frames the decoded output will be delayed relative to
 847      * the encoded input.
 848      * - encoding: set by lavc.
 849      * - decoding: unused
 850      */
 851     int delay;
 852
 853     /* - encoding parameters */
 854     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 855     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 856
 857     /**
 858      * minimum quantizer.
 859      * - encoding: set by user.
 860      * - decoding: unused
 861      */
 862     int qmin;
 863
 864     /**
 865      * maximum quantizer.
 866      * - encoding: set by user.
 867      * - decoding: unused
 868      */
 869     int qmax;
 870
 871     /**
 872      * maximum quantizer difference etween frames.
 873      * - encoding: set by user.
 874      * - decoding: unused
 875      */
 876     int max_qdiff;
 877
 878     /**
 879      * maximum number of b frames between non b frames.
 880      * note: the output will be delayed by max_b_frames+1 relative to the input
 881      * - encoding: set by user.
 882      * - decoding: unused
 883      */
 884     int max_b_frames;
 885
 886     /**
 887      * qscale factor between ip and b frames.
 888      * - encoding: set by user.
 889      * - decoding: unused
 890      */
 891     float b_quant_factor;
 892
 893     /** obsolete FIXME remove */
 894     int rc_strategy;
 895 #define FF_RC_STRATEGY_XVID 1
 896
 897     int b_frame_strategy;
 898
 899     /**
 900      * hurry up amount.
 901      * deprecated in favor of skip_idct and skip_frame
 902      * - encoding: unused
 903      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 904      */
 905     int hurry_up;
 906
 907     struct AVCodec *codec;
 908
 909     void *priv_data;
 910
 911     /* unused, FIXME remove*/
 912     int rtp_mode;
 913
 914     int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
 915                             /* do it's best to deliver a chunk with size    */
 916                             /* below rtp_payload_size, the chunk will start */
 917                             /* with a start code on some codecs like H.263  */
 918                             /* This doesn't take account of any particular  */
 919                             /* headers inside the transmited RTP payload    */
 920
 921
 922     /* The RTP callback: This function is called   */
 923     /* every time the encoder has a packet to send */
 924     /* Depends on the encoder if the data starts   */
 925     /* with a Start Code (it should) H.263 does.   */
 926     /* mb_nb contains the number of macroblocks    */
 927     /* encoded in the RTP payload                  */
 928     void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
 929
 930     /* statistics, used for 2-pass encoding */
 931     int mv_bits;
 932     int header_bits;
 933     int i_tex_bits;
 934     int p_tex_bits;
 935     int i_count;
 936     int p_count;
 937     int skip_count;
 938     int misc_bits;
 939
 940     /**
 941      * number of bits used for the previously encoded frame.
 942      * - encoding: set by lavc
 943      * - decoding: unused
 944      */
 945     int frame_bits;
 946
 947     /**
 948      * private data of the user, can be used to carry app specific stuff.
 949      * - encoding: set by user
 950      * - decoding: set by user
 951      */
 952     void *opaque;
 953
 954     char codec_name[32];
 955     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 956     enum CodecID codec_id; /* see CODEC_ID_xxx */
 957
 958     /**
 959      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 960      * this is used to workaround some encoder bugs
 961      * - encoding: set by user, if not then the default based on codec_id will be used
 962      * - decoding: set by user, will be converted to upper case by lavc during init
 963      */
 964     unsigned int codec_tag;
 965
 966     /**
 967      * workaround bugs in encoders which sometimes cannot be detected automatically.
 968      * - encoding: set by user
 969      * - decoding: set by user
 970      */
 971     int workaround_bugs;
 972 #define FF_BUG_AUTODETECT       1  ///< autodetection
 973 #define FF_BUG_OLD_MSMPEG4      2
 974 #define FF_BUG_XVID_ILACE       4
 975 #define FF_BUG_UMP4             8
 976 #define FF_BUG_NO_PADDING       16
 977 #define FF_BUG_AMV              32
 978 #define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
 979 #define FF_BUG_QPEL_CHROMA      64
 980 #define FF_BUG_STD_QPEL         128
 981 #define FF_BUG_QPEL_CHROMA2     256
 982 #define FF_BUG_DIRECT_BLOCKSIZE 512
 983 #define FF_BUG_EDGE             1024
 984 #define FF_BUG_HPEL_CHROMA      2048
 985 #define FF_BUG_DC_CLIP          4096
 986 #define FF_BUG_MS               8192 ///< workaround various bugs in microsofts broken decoders
 987 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
 988
 989     /**
 990      * luma single coeff elimination threshold.
 991      * - encoding: set by user
 992      * - decoding: unused
 993      */
 994     int luma_elim_threshold;
 995
 996     /**
 997      * chroma single coeff elimination threshold.
 998      * - encoding: set by user
 999      * - decoding: unused
1000      */
1001     int chroma_elim_threshold;
1002
1003     /**
1004      * strictly follow the std (MPEG4, ...).
1005      * - encoding: set by user
1006      * - decoding: unused
1007      */
1008     int strict_std_compliance;
1009 #define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a older more strict version of the spec or reference software
1010 #define FF_COMPLIANCE_STRICT        1 ///< strictly conform to all the things in the spec no matter what consequences
1011 #define FF_COMPLIANCE_NORMAL        0
1012 #define FF_COMPLIANCE_INOFFICIAL   -1 ///< allow inofficial extensions
1013 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1014
1015     /**
1016      * qscale offset between ip and b frames.
1017      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1018      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1019      * - encoding: set by user.
1020      * - decoding: unused
1021      */
1022     float b_quant_offset;
1023
1024     /**
1025      * error resilience higher values will detect more errors but may missdetect
1026      * some more or less valid parts as errors.
1027      * - encoding: unused
1028      * - decoding: set by user
1029      */
1030     int error_resilience;
1031 #define FF_ER_CAREFUL         1
1032 #define FF_ER_COMPLIANT       2
1033 #define FF_ER_AGGRESSIVE      3
1034 #define FF_ER_VERY_AGGRESSIVE 4
1035
1036     /**
1037      * called at the beginning of each frame to get a buffer for it.
1038      * if pic.reference is set then the frame will be read later by lavc
1039      * avcodec_align_dimensions() should be used to find the required width and
1040      * height, as they normally need to be rounded up to the next multiple of 16
1041      * - encoding: unused
1042      * - decoding: set by lavc, user can override
1043      */
1044     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1045
1046     /**
1047      * called to release buffers which where allocated with get_buffer.
1048      * a released buffer can be reused in get_buffer()
1049      * pic.data[*] must be set to NULL
1050      * - encoding: unused
1051      * - decoding: set by lavc, user can override
1052      */
1053     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1054
1055     /**
1056      * if 1 the stream has a 1 frame delay during decoding.
1057      * - encoding: set by lavc
1058      * - decoding: set by lavc
1059      */
1060     int has_b_frames;
1061
1062     /**
1063      * number of bytes per packet if constant and known or 0
1064      * used by some WAV based audio codecs
1065      */
1066     int block_align;
1067
1068     int parse_only; /* - decoding only: if true, only parsing is done
1069                        (function avcodec_parse_frame()). The frame
1070                        data is returned. Only MPEG codecs support this now. */
1071
1072     /**
1073      * 0-> h263 quant 1-> mpeg quant.
1074      * - encoding: set by user.
1075      * - decoding: unused
1076      */
1077     int mpeg_quant;
1078
1079     /**
1080      * pass1 encoding statistics output buffer.
1081      * - encoding: set by lavc
1082      * - decoding: unused
1083      */
1084     char *stats_out;
1085
1086     /**
1087      * pass2 encoding statistics input buffer.
1088      * concatenated stuff from stats_out of pass1 should be placed here
1089      * - encoding: allocated/set/freed by user
1090      * - decoding: unused
1091      */
1092     char *stats_in;
1093
1094     /**
1095      * ratecontrol qmin qmax limiting method.
1096      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1097      * - encoding: set by user.
1098      * - decoding: unused
1099      */
1100     float rc_qsquish;
1101
1102     float rc_qmod_amp;
1103     int rc_qmod_freq;
1104
1105     /**
1106      * ratecontrol override, see RcOverride.
1107      * - encoding: allocated/set/freed by user.
1108      * - decoding: unused
1109      */
1110     RcOverride *rc_override;
1111     int rc_override_count;
1112
1113     /**
1114      * rate control equation.
1115      * - encoding: set by user
1116      * - decoding: unused
1117      */
1118     char *rc_eq;
1119
1120     /**
1121      * maximum bitrate.
1122      * - encoding: set by user.
1123      * - decoding: unused
1124      */
1125     int rc_max_rate;
1126
1127     /**
1128      * minimum bitrate.
1129      * - encoding: set by user.
1130      * - decoding: unused
1131      */
1132     int rc_min_rate;
1133
1134     /**
1135      * decoder bitstream buffer size.
1136      * - encoding: set by user.
1137      * - decoding: unused
1138      */
1139     int rc_buffer_size;
1140     float rc_buffer_aggressivity;
1141
1142     /**
1143      * qscale factor between p and i frames.
1144      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1145      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1146      * - encoding: set by user.
1147      * - decoding: unused
1148      */
1149     float i_quant_factor;
1150
1151     /**
1152      * qscale offset between p and i frames.
1153      * - encoding: set by user.
1154      * - decoding: unused
1155      */
1156     float i_quant_offset;
1157
1158     /**
1159      * initial complexity for pass1 ratecontrol.
1160      * - encoding: set by user.
1161      * - decoding: unused
1162      */
1163     float rc_initial_cplx;
1164
1165     /**
1166      * dct algorithm, see FF_DCT_* below.
1167      * - encoding: set by user
1168      * - decoding: unused
1169      */
1170     int dct_algo;
1171 #define FF_DCT_AUTO    0
1172 #define FF_DCT_FASTINT 1
1173 #define FF_DCT_INT     2
1174 #define FF_DCT_MMX     3
1175 #define FF_DCT_MLIB    4
1176 #define FF_DCT_ALTIVEC 5
1177 #define FF_DCT_FAAN    6
1178
1179     /**
1180      * luminance masking (0-> disabled).
1181      * - encoding: set by user
1182      * - decoding: unused
1183      */
1184     float lumi_masking;
1185
1186     /**
1187      * temporary complexity masking (0-> disabled).
1188      * - encoding: set by user
1189      * - decoding: unused
1190      */
1191     float temporal_cplx_masking;
1192
1193     /**
1194      * spatial complexity masking (0-> disabled).
1195      * - encoding: set by user
1196      * - decoding: unused
1197      */
1198     float spatial_cplx_masking;
1199
1200     /**
1201      * p block masking (0-> disabled).
1202      * - encoding: set by user
1203      * - decoding: unused
1204      */
1205     float p_masking;
1206
1207     /**
1208      * darkness masking (0-> disabled).
1209      * - encoding: set by user
1210      * - decoding: unused
1211      */
1212     float dark_masking;
1213
1214
1215     /* for binary compatibility */
1216     int unused;
1217
1218     /**
1219      * idct algorithm, see FF_IDCT_* below.
1220      * - encoding: set by user
1221      * - decoding: set by user
1222      */
1223     int idct_algo;
1224 #define FF_IDCT_AUTO         0
1225 #define FF_IDCT_INT          1
1226 #define FF_IDCT_SIMPLE       2
1227 #define FF_IDCT_SIMPLEMMX    3
1228 #define FF_IDCT_LIBMPEG2MMX  4
1229 #define FF_IDCT_PS2          5
1230 #define FF_IDCT_MLIB         6
1231 #define FF_IDCT_ARM          7
1232 #define FF_IDCT_ALTIVEC      8
1233 #define FF_IDCT_SH4          9
1234 #define FF_IDCT_SIMPLEARM    10
1235 #define FF_IDCT_H264         11
1236 #define FF_IDCT_VP3          12
1237 #define FF_IDCT_IPP          13
1238 #define FF_IDCT_XVIDMMX      14
1239
1240     /**
1241      * slice count.
1242      * - encoding: set by lavc
1243      * - decoding: set by user (or 0)
1244      */
1245     int slice_count;
1246     /**
1247      * slice offsets in the frame in bytes.
1248      * - encoding: set/allocated by lavc
1249      * - decoding: set/allocated by user (or NULL)
1250      */
1251     int *slice_offset;
1252
1253     /**
1254      * error concealment flags.
1255      * - encoding: unused
1256      * - decoding: set by user
1257      */
1258     int error_concealment;
1259 #define FF_EC_GUESS_MVS   1
1260 #define FF_EC_DEBLOCK     2
1261
1262     /**
1263      * dsp_mask could be add used to disable unwanted CPU features
1264      * CPU features (i.e. MMX, SSE. ...)
1265      *
1266      * with FORCE flag you may instead enable given CPU features
1267      * (Dangerous: usable in case of misdetection, improper usage however will
1268      * result into program crash)
1269      */
1270     unsigned dsp_mask;
1271 #define FF_MM_FORCE    0x80000000 /* force usage of selected flags (OR) */
1272     /* lower 16 bits - CPU features */
1273 #ifdef HAVE_MMX
1274 #define FF_MM_MMX      0x0001 /* standard MMX */
1275 #define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1276 #define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1277 #define FF_MM_SSE      0x0008 /* SSE functions */
1278 #define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1279 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1280 #endif /* HAVE_MMX */
1281 #ifdef HAVE_IWMMXT
1282 #define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1283 #endif /* HAVE_IWMMXT */
1284
1285     /**
1286      * bits per sample/pixel from the demuxer (needed for huffyuv).
1287      * - encoding: set by lavc
1288      * - decoding: set by user
1289      */
1290      int bits_per_sample;
1291
1292     /**
1293      * prediction method (needed for huffyuv).
1294      * - encoding: set by user
1295      * - decoding: unused
1296      */
1297      int prediction_method;
1298 #define FF_PRED_LEFT   0
1299 #define FF_PRED_PLANE  1
1300 #define FF_PRED_MEDIAN 2
1301
1302     /**
1303      * sample aspect ratio (0 if unknown).
1304      * numerator and denominator must be relative prime and smaller then 256 for some video standards
1305      * - encoding: set by user.
1306      * - decoding: set by lavc.
1307      */
1308     AVRational sample_aspect_ratio;
1309
1310     /**
1311      * the picture in the bitstream.
1312      * - encoding: set by lavc
1313      * - decoding: set by lavc
1314      */
1315     AVFrame *coded_frame;
1316
1317     /**
1318      * debug.
1319      * - encoding: set by user.
1320      * - decoding: set by user.
1321      */
1322     int debug;
1323 #define FF_DEBUG_PICT_INFO 1
1324 #define FF_DEBUG_RC        2
1325 #define FF_DEBUG_BITSTREAM 4
1326 #define FF_DEBUG_MB_TYPE   8
1327 #define FF_DEBUG_QP        16
1328 #define FF_DEBUG_MV        32
1329 #define FF_DEBUG_DCT_COEFF 0x00000040
1330 #define FF_DEBUG_SKIP      0x00000080
1331 #define FF_DEBUG_STARTCODE 0x00000100
1332 #define FF_DEBUG_PTS       0x00000200
1333 #define FF_DEBUG_ER        0x00000400
1334 #define FF_DEBUG_MMCO      0x00000800
1335 #define FF_DEBUG_BUGS      0x00001000
1336 #define FF_DEBUG_VIS_QP    0x00002000
1337 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1338
1339     /**
1340      * debug.
1341      * - encoding: set by user.
1342      * - decoding: set by user.
1343      */
1344     int debug_mv;
1345 #define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1346 #define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1347 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1348
1349     /**
1350      * error.
1351      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1352      * - decoding: unused
1353      */
1354     uint64_t error[4];
1355
1356     /**
1357      * minimum MB quantizer.
1358      * - encoding: unused
1359      * - decoding: unused
1360      */
1361     int mb_qmin;
1362
1363     /**
1364      * maximum MB quantizer.
1365      * - encoding: unused
1366      * - decoding: unused
1367      */
1368     int mb_qmax;
1369
1370     /**
1371      * motion estimation compare function.
1372      * - encoding: set by user.
1373      * - decoding: unused
1374      */
1375     int me_cmp;
1376     /**
1377      * subpixel motion estimation compare function.
1378      * - encoding: set by user.
1379      * - decoding: unused
1380      */
1381     int me_sub_cmp;
1382     /**
1383      * macroblock compare function (not supported yet).
1384      * - encoding: set by user.
1385      * - decoding: unused
1386      */
1387     int mb_cmp;
1388     /**
1389      * interlaced dct compare function
1390      * - encoding: set by user.
1391      * - decoding: unused
1392      */
1393     int ildct_cmp;
1394 #define FF_CMP_SAD  0
1395 #define FF_CMP_SSE  1
1396 #define FF_CMP_SATD 2
1397 #define FF_CMP_DCT  3
1398 #define FF_CMP_PSNR 4
1399 #define FF_CMP_BIT  5
1400 #define FF_CMP_RD   6
1401 #define FF_CMP_ZERO 7
1402 #define FF_CMP_VSAD 8
1403 #define FF_CMP_VSSE 9
1404 #define FF_CMP_NSSE 10
1405 #define FF_CMP_W53  11
1406 #define FF_CMP_W97  12
1407 #define FF_CMP_DCTMAX 13
1408 #define FF_CMP_DCT264 14
1409 #define FF_CMP_CHROMA 256
1410
1411     /**
1412      * ME diamond size & shape.
1413      * - encoding: set by user.
1414      * - decoding: unused
1415      */
1416     int dia_size;
1417
1418     /**
1419      * amount of previous MV predictors (2a+1 x 2a+1 square).
1420      * - encoding: set by user.
1421      * - decoding: unused
1422      */
1423     int last_predictor_count;
1424
1425     /**
1426      * pre pass for motion estimation.
1427      * - encoding: set by user.
1428      * - decoding: unused
1429      */
1430     int pre_me;
1431
1432     /**
1433      * motion estimation pre pass compare function.
1434      * - encoding: set by user.
1435      * - decoding: unused
1436      */
1437     int me_pre_cmp;
1438
1439     /**
1440      * ME pre pass diamond size & shape.
1441      * - encoding: set by user.
1442      * - decoding: unused
1443      */
1444     int pre_dia_size;
1445
1446     /**
1447      * subpel ME quality.
1448      * - encoding: set by user.
1449      * - decoding: unused
1450      */
1451     int me_subpel_quality;
1452
1453     /**
1454      * callback to negotiate the pixelFormat.
1455      * @param fmt is the list of formats which are supported by the codec,
1456      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1457      * the first is allways the native one
1458      * @return the choosen format
1459      * - encoding: unused
1460      * - decoding: set by user, if not set then the native format will always be choosen
1461      */
1462     enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1463
1464     /**
1465      * DTG active format information (additionnal aspect ratio
1466      * information only used in DVB MPEG2 transport streams). 0 if
1467      * not set.
1468      *
1469      * - encoding: unused.
1470      * - decoding: set by decoder
1471      */
1472     int dtg_active_format;
1473 #define FF_DTG_AFD_SAME         8
1474 #define FF_DTG_AFD_4_3          9
1475 #define FF_DTG_AFD_16_9         10
1476 #define FF_DTG_AFD_14_9         11
1477 #define FF_DTG_AFD_4_3_SP_14_9  13
1478 #define FF_DTG_AFD_16_9_SP_14_9 14
1479 #define FF_DTG_AFD_SP_4_3       15
1480
1481     /**
1482      * Maximum motion estimation search range in subpel units.
1483      * if 0 then no limit
1484      *
1485      * - encoding: set by user.
1486      * - decoding: unused.
1487      */
1488     int me_range;
1489
1490     /**
1491      * intra quantizer bias.
1492      * - encoding: set by user.
1493      * - decoding: unused
1494      */
1495     int intra_quant_bias;
1496 #define FF_DEFAULT_QUANT_BIAS 999999
1497
1498     /**
1499      * inter quantizer bias.
1500      * - encoding: set by user.
1501      * - decoding: unused
1502      */
1503     int inter_quant_bias;
1504
1505     /**
1506      * color table ID.
1507      * - encoding: unused.
1508      * - decoding: which clrtable should be used for 8bit RGB images
1509      *             table have to be stored somewhere FIXME
1510      */
1511     int color_table_id;
1512
1513     /**
1514      * internal_buffer count.
1515      * Don't touch, used by lavc default_get_buffer()
1516      */
1517     int internal_buffer_count;
1518
1519     /**
1520      * internal_buffers.
1521      * Don't touch, used by lavc default_get_buffer()
1522      */
1523     void *internal_buffer;
1524
1525 #define FF_LAMBDA_SHIFT 7
1526 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1527 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1528 #define FF_LAMBDA_MAX (256*128-1)
1529
1530 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1531     /**
1532      * global quality for codecs which cannot change it per frame.
1533      * this should be proportional to MPEG1/2/4 qscale.
1534      * - encoding: set by user.
1535      * - decoding: unused
1536      */
1537     int global_quality;
1538
1539 #define FF_CODER_TYPE_VLC   0
1540 #define FF_CODER_TYPE_AC    1
1541     /**
1542      * coder type
1543      * - encoding: set by user.
1544      * - decoding: unused
1545      */
1546     int coder_type;
1547
1548     /**
1549      * context model
1550      * - encoding: set by user.
1551      * - decoding: unused
1552      */
1553     int context_model;
1554 #if 0
1555     /**
1556      *
1557      * - encoding: unused
1558      * - decoding: set by user.
1559      */
1560     uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1561 #endif
1562
1563     /**
1564      * slice flags
1565      * - encoding: unused
1566      * - decoding: set by user.
1567      */
1568     int slice_flags;
1569 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1570 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1571 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1572
1573     /**
1574      * XVideo Motion Acceleration
1575      * - encoding: forbidden
1576      * - decoding: set by decoder
1577      */
1578     int xvmc_acceleration;
1579
1580     /**
1581      * macroblock decision mode
1582      * - encoding: set by user.
1583      * - decoding: unused
1584      */
1585     int mb_decision;
1586 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1587 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1588 #define FF_MB_DECISION_RD     2        ///< rate distoration
1589
1590     /**
1591      * custom intra quantization matrix
1592      * - encoding: set by user, can be NULL
1593      * - decoding: set by lavc
1594      */
1595     uint16_t *intra_matrix;
1596
1597     /**
1598      * custom inter quantization matrix
1599      * - encoding: set by user, can be NULL
1600      * - decoding: set by lavc
1601      */
1602     uint16_t *inter_matrix;
1603
1604     /**
1605      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1606      * this is used to workaround some encoder bugs
1607      * - encoding: unused
1608      * - decoding: set by user, will be converted to upper case by lavc during init
1609      */
1610     unsigned int stream_codec_tag;
1611
1612     /**
1613      * scene change detection threshold.
1614      * 0 is default, larger means fewer detected scene changes
1615      * - encoding: set by user.
1616      * - decoding: unused
1617      */
1618     int scenechange_threshold;
1619
1620     /**
1621      * minimum lagrange multipler
1622      * - encoding: set by user.
1623      * - decoding: unused
1624      */
1625     int lmin;
1626
1627     /**
1628      * maximum lagrange multipler
1629      * - encoding: set by user.
1630      * - decoding: unused
1631      */
1632     int lmax;
1633
1634     /**
1635      * Palette control structure
1636      * - encoding: ??? (no palette-enabled encoder yet)
1637      * - decoding: set by user.
1638      */
1639     struct AVPaletteControl *palctrl;
1640
1641     /**
1642      * noise reduction strength
1643      * - encoding: set by user.
1644      * - decoding: unused
1645      */
1646     int noise_reduction;
1647
1648     /**
1649      * called at the beginning of a frame to get cr buffer for it.
1650      * buffer type (size, hints) must be the same. lavc won't check it.
1651      * lavc will pass previous buffer in pic, function should return
1652      * same buffer or new buffer with old frame "painted" into it.
1653      * if pic.data[0] == NULL must behave like get_buffer().
1654      * - encoding: unused
1655      * - decoding: set by lavc, user can override
1656      */
1657     int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1658
1659     /**
1660      * number of bits which should be loaded into the rc buffer before decoding starts
1661      * - encoding: set by user.
1662      * - decoding: unused
1663      */
1664     int rc_initial_buffer_occupancy;
1665
1666     /**
1667      *
1668      * - encoding: set by user.
1669      * - decoding: unused
1670      */
1671     int inter_threshold;
1672
1673     /**
1674      * CODEC_FLAG2_*.
1675      * - encoding: set by user.
1676      * - decoding: set by user.
1677      */
1678     int flags2;
1679
1680     /**
1681      * simulates errors in the bitstream to test error concealment.
1682      * - encoding: set by user.
1683      * - decoding: unused.
1684      */
1685     int error_rate;
1686
1687     /**
1688      * MP3 antialias algorithm, see FF_AA_* below.
1689      * - encoding: unused
1690      * - decoding: set by user
1691      */
1692     int antialias_algo;
1693 #define FF_AA_AUTO    0
1694 #define FF_AA_FASTINT 1 //not implemented yet
1695 #define FF_AA_INT     2
1696 #define FF_AA_FLOAT   3
1697     /**
1698      * Quantizer noise shaping.
1699      * - encoding: set by user
1700      * - decoding: unused
1701      */
1702     int quantizer_noise_shaping;
1703
1704     /**
1705      * Thread count.
1706      * is used to decide how many independant tasks should be passed to execute()
1707      * - encoding: set by user
1708      * - decoding: set by user
1709      */
1710     int thread_count;
1711
1712     /**
1713      * the codec may call this to execute several independant things. it will return only after
1714      * finishing all tasks, the user may replace this with some multithreaded implementation, the
1715      * default implementation will execute the parts serially
1716      * @param count the number of things to execute
1717      * - encoding: set by lavc, user can override
1718      * - decoding: set by lavc, user can override
1719      */
1720     int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1721
1722     /**
1723      * Thread opaque.
1724      * can be used by execute() to store some per AVCodecContext stuff.
1725      * - encoding: set by execute()
1726      * - decoding: set by execute()
1727      */
1728     void *thread_opaque;
1729
1730     /**
1731      * Motion estimation threshold. under which no motion estimation is
1732      * performed, but instead the user specified motion vectors are used
1733      *
1734      * - encoding: set by user
1735      * - decoding: unused
1736      */
1737      int me_threshold;
1738
1739     /**
1740      * Macroblock threshold. under which the user specified macroblock types will be used
1741      * - encoding: set by user
1742      * - decoding: unused
1743      */
1744      int mb_threshold;
1745
1746     /**
1747      * precision of the intra dc coefficient - 8.
1748      * - encoding: set by user
1749      * - decoding: unused
1750      */
1751      int intra_dc_precision;
1752
1753     /**
1754      * noise vs. sse weight for the nsse comparsion function.
1755      * - encoding: set by user
1756      * - decoding: unused
1757      */
1758      int nsse_weight;
1759
1760     /**
1761      * number of macroblock rows at the top which are skipped.
1762      * - encoding: unused
1763      * - decoding: set by user
1764      */
1765      int skip_top;
1766
1767     /**
1768      * number of macroblock rows at the bottom which are skipped.
1769      * - encoding: unused
1770      * - decoding: set by user
1771      */
1772      int skip_bottom;
1773
1774     /**
1775      * profile
1776      * - encoding: set by user
1777      * - decoding: set by lavc
1778      */
1779      int profile;
1780 #define FF_PROFILE_UNKNOWN -99
1781
1782     /**
1783      * level
1784      * - encoding: set by user
1785      * - decoding: set by lavc
1786      */
1787      int level;
1788 #define FF_LEVEL_UNKNOWN -99
1789
1790     /**
1791      * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1792      * - encoding: unused
1793      * - decoding: set by user
1794      */
1795      int lowres;
1796
1797     /**
1798      * bitsream width / height. may be different from width/height if lowres
1799      * or other things are used
1800      * - encoding: unused
1801      * - decoding: set by user before init if known, codec should override / dynamically change if needed
1802      */
1803     int coded_width, coded_height;
1804
1805     /**
1806      * frame skip threshold
1807      * - encoding: set by user
1808      * - decoding: unused
1809      */
1810     int frame_skip_threshold;
1811
1812     /**
1813      * frame skip factor
1814      * - encoding: set by user
1815      * - decoding: unused
1816      */
1817     int frame_skip_factor;
1818
1819     /**
1820      * frame skip exponent
1821      * - encoding: set by user
1822      * - decoding: unused
1823      */
1824     int frame_skip_exp;
1825
1826     /**
1827      * frame skip comparission function
1828      * - encoding: set by user.
1829      * - decoding: unused
1830      */
1831     int frame_skip_cmp;
1832
1833     /**
1834      * border processing masking. raises the quantizer for mbs on the borders
1835      * of the picture.
1836      * - encoding: set by user
1837      * - decoding: unused
1838      */
1839     float border_masking;
1840
1841     /**
1842      * minimum MB lagrange multipler.
1843      * - encoding: set by user.
1844      * - decoding: unused
1845      */
1846     int mb_lmin;
1847
1848     /**
1849      * maximum MB lagrange multipler.
1850      * - encoding: set by user.
1851      * - decoding: unused
1852      */
1853     int mb_lmax;
1854
1855     /**
1856      *
1857      * - encoding: set by user.
1858      * - decoding: unused
1859      */
1860     int me_penalty_compensation;
1861
1862     /**
1863      *
1864      * - encoding: unused
1865      * - decoding: set by user.
1866      */
1867     enum AVDiscard skip_loop_filter;
1868
1869     /**
1870      *
1871      * - encoding: unused
1872      * - decoding: set by user.
1873      */
1874     enum AVDiscard skip_idct;
1875
1876     /**
1877      *
1878      * - encoding: unused
1879      * - decoding: set by user.
1880      */
1881     enum AVDiscard skip_frame;
1882
1883     /**
1884      *
1885      * - encoding: set by user.
1886      * - decoding: unused
1887      */
1888     int bidir_refine;
1889
1890     /**
1891      *
1892      * - encoding: set by user.
1893      * - decoding: unused
1894      */
1895     int brd_scale;
1896
1897     /**
1898      * constant rate factor - quality-based VBR - values ~correspond to qps
1899      * - encoding: set by user.
1900      * - decoding: unused
1901      */
1902     int crf;
1903
1904     /**
1905      * constant quantization parameter rate control method
1906      * - encoding: set by user.
1907      * - decoding: unused
1908      */
1909     int cqp;
1910
1911     /**
1912      * minimum gop size
1913      * - encoding: set by user.
1914      * - decoding: unused
1915      */
1916     int keyint_min;
1917
1918     /**
1919      * number of reference frames
1920      * - encoding: set by user.
1921      * - decoding: unused
1922      */
1923     int refs;
1924
1925     /**
1926      * chroma qp offset from luma
1927      * - encoding: set by user.
1928      * - decoding: unused
1929      */
1930     int chromaoffset;
1931
1932     /**
1933      * influences how often b-frames are used
1934      * - encoding: set by user.
1935      * - decoding: unused
1936      */
1937     int bframebias;
1938
1939     /**
1940      * trellis RD quantization
1941      * - encoding: set by user.
1942      * - decoding: unused
1943      */
1944     int trellis;
1945
1946     /**
1947      * reduce fluctuations in qp (before curve compression)
1948      * - encoding: set by user.
1949      * - decoding: unused
1950      */
1951     float complexityblur;
1952
1953     /**
1954      * in-loop deblocking filter alphac0 parameter
1955      * alpha is in the range -6...6
1956      * - encoding: set by user.
1957      * - decoding: unused
1958      */
1959     int deblockalpha;
1960
1961     /**
1962      * in-loop deblocking filter beta parameter
1963      * beta is in the range -6...6
1964      * - encoding: set by user.
1965      * - decoding: unused
1966      */
1967     int deblockbeta;
1968
1969     /**
1970      * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1971      * - encoding: set by user.
1972      * - decoding: unused
1973      */
1974     int partitions;
1975 #define X264_PART_I4X4 0x001  /* Analyse i4x4 */
1976 #define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
1977 #define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
1978 #define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
1979 #define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
1980
1981     /**
1982      * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1983      * - encoding: set by user.
1984      * - decoding: unused
1985      */
1986     int directpred;
1987
1988     /**
1989      * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1990      * - encoding: set by user.
1991      * - decoding: unused
1992      */
1993     int cutoff;
1994
1995     /**
1996      * multiplied by qscale for each frame and added to scene_change_score
1997      * - encoding: set by user.
1998      * - decoding: unused
1999      */
2000     int scenechange_factor;
2001 } AVCodecContext;
2002
2003 /**
2004  * AVCodec.
2005  */
2006 typedef struct AVCodec {
2007     const char *name;
2008     enum CodecType type;
2009     enum CodecID id;
2010     int priv_data_size;
2011     int (*init)(AVCodecContext *);
2012     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2013     int (*close)(AVCodecContext *);
2014     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2015                   uint8_t *buf, int buf_size);
2016     int capabilities;
2017 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2018     void *dummy; // FIXME remove next time we break binary compatibility
2019 #endif
2020     struct AVCodec *next;
2021     void (*flush)(AVCodecContext *);
2022     const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2023     const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2024 } AVCodec;
2025
2026 /**
2027  * four components are given, that's all.
2028  * the last component is alpha
2029  */
2030 typedef struct AVPicture {
2031     uint8_t *data[4];
2032     int linesize[4];       ///< number of bytes per line
2033 } AVPicture;
2034
2035 /**
2036  * AVPaletteControl
2037  * This structure defines a method for communicating palette changes
2038  * between and demuxer and a decoder.
2039  */
2040 #define AVPALETTE_SIZE 1024
2041 #define AVPALETTE_COUNT 256
2042 typedef struct AVPaletteControl {
2043
2044     /* demuxer sets this to 1 to indicate the palette has changed;
2045      * decoder resets to 0 */
2046     int palette_changed;
2047
2048     /* 4-byte ARGB palette entries, stored in native byte order; note that
2049      * the individual palette components should be on a 8-bit scale; if
2050      * the palette data comes from a IBM VGA native format, the component
2051      * data is probably 6 bits in size and needs to be scaled */
2052     unsigned int palette[AVPALETTE_COUNT];
2053
2054 } AVPaletteControl;
2055
2056 typedef struct AVSubtitleRect {
2057     uint16_t x;
2058     uint16_t y;
2059     uint16_t w;
2060     uint16_t h;
2061     uint16_t nb_colors;
2062     int linesize;
2063     uint32_t *rgba_palette;
2064     uint8_t *bitmap;
2065 } AVSubtitleRect;
2066
2067 typedef struct AVSubtitle {
2068     uint16_t format; /* 0 = graphics */
2069     uint32_t start_display_time; /* relative to packet pts, in ms */
2070     uint32_t end_display_time; /* relative to packet pts, in ms */
2071     uint32_t num_rects;
2072     AVSubtitleRect *rects;
2073 } AVSubtitle;
2074
2075 extern AVCodec ac3_encoder;
2076 extern AVCodec mp2_encoder;
2077 extern AVCodec mp3lame_encoder;
2078 extern AVCodec oggvorbis_encoder;
2079 extern AVCodec oggtheora_encoder;
2080 extern AVCodec faac_encoder;
2081 extern AVCodec xvid_encoder;
2082 extern AVCodec mpeg1video_encoder;
2083 extern AVCodec mpeg2video_encoder;
2084 extern AVCodec h261_encoder;
2085 extern AVCodec h263_encoder;
2086 extern AVCodec h263p_encoder;
2087 extern AVCodec flv_encoder;
2088 extern AVCodec rv10_encoder;
2089 extern AVCodec rv20_encoder;
2090 extern AVCodec dvvideo_encoder;
2091 extern AVCodec mjpeg_encoder;
2092 extern AVCodec ljpeg_encoder;
2093 extern AVCodec jpegls_encoder;
2094 extern AVCodec png_encoder;
2095 extern AVCodec ppm_encoder;
2096 extern AVCodec pgm_encoder;
2097 extern AVCodec pgmyuv_encoder;
2098 extern AVCodec pbm_encoder;
2099 extern AVCodec pam_encoder;
2100 extern AVCodec mpeg4_encoder;
2101 extern AVCodec msmpeg4v1_encoder;
2102 extern AVCodec msmpeg4v2_encoder;
2103 extern AVCodec msmpeg4v3_encoder;
2104 extern AVCodec wmv1_encoder;
2105 extern AVCodec wmv2_encoder;
2106 extern AVCodec huffyuv_encoder;
2107 extern AVCodec ffvhuff_encoder;
2108 extern AVCodec h264_encoder;
2109 extern AVCodec asv1_encoder;
2110 extern AVCodec asv2_encoder;
2111 extern AVCodec vcr1_encoder;
2112 extern AVCodec ffv1_encoder;
2113 extern AVCodec snow_encoder;
2114 extern AVCodec mdec_encoder;
2115 extern AVCodec zlib_encoder;
2116 extern AVCodec sonic_encoder;
2117 extern AVCodec sonic_ls_encoder;
2118 extern AVCodec svq1_encoder;
2119 extern AVCodec x264_encoder;
2120
2121 extern AVCodec h263_decoder;
2122 extern AVCodec h261_decoder;
2123 extern AVCodec mpeg4_decoder;
2124 extern AVCodec msmpeg4v1_decoder;
2125 extern AVCodec msmpeg4v2_decoder;
2126 extern AVCodec msmpeg4v3_decoder;
2127 extern AVCodec wmv1_decoder;
2128 extern AVCodec wmv2_decoder;
2129 extern AVCodec vc9_decoder;
2130 extern AVCodec wmv3_decoder;
2131 extern AVCodec mpeg1video_decoder;
2132 extern AVCodec mpeg2video_decoder;
2133 extern AVCodec mpegvideo_decoder;
2134 extern AVCodec mpeg_xvmc_decoder;
2135 extern AVCodec h263i_decoder;
2136 extern AVCodec flv_decoder;
2137 extern AVCodec rv10_decoder;
2138 extern AVCodec rv20_decoder;
2139 extern AVCodec rv30_decoder;
2140 extern AVCodec rv40_decoder;
2141 extern AVCodec svq1_decoder;
2142 extern AVCodec svq3_decoder;
2143 extern AVCodec dvvideo_decoder;
2144 extern AVCodec wmav1_decoder;
2145 extern AVCodec wmav2_decoder;
2146 extern AVCodec mjpeg_decoder;
2147 extern AVCodec mjpegb_decoder;
2148 extern AVCodec sp5x_decoder;
2149 extern AVCodec png_decoder;
2150 extern AVCodec mp2_decoder;
2151 extern AVCodec mp3_decoder;
2152 extern AVCodec mp3adu_decoder;
2153 extern AVCodec mp3on4_decoder;
2154 extern AVCodec qdm2_decoder;
2155 extern AVCodec cook_decoder;
2156 extern AVCodec truespeech_decoder;
2157 extern AVCodec mace3_decoder;
2158 extern AVCodec mace6_decoder;
2159 extern AVCodec huffyuv_decoder;
2160 extern AVCodec ffvhuff_decoder;
2161 extern AVCodec oggvorbis_decoder;
2162 extern AVCodec oggtheora_decoder;
2163 extern AVCodec cyuv_decoder;
2164 extern AVCodec h264_decoder;
2165 extern AVCodec indeo3_decoder;
2166 extern AVCodec vp3_decoder;
2167 extern AVCodec theora_decoder;
2168 extern AVCodec amr_nb_decoder;
2169 extern AVCodec amr_nb_encoder;
2170 extern AVCodec amr_wb_encoder;
2171 extern AVCodec amr_wb_decoder;
2172 extern AVCodec aac_decoder;
2173 extern AVCodec mpeg4aac_decoder;
2174 extern AVCodec asv1_decoder;
2175 extern AVCodec asv2_decoder;
2176 extern AVCodec vcr1_decoder;
2177 extern AVCodec cljr_decoder;
2178 extern AVCodec ffv1_decoder;
2179 extern AVCodec snow_decoder;
2180 extern AVCodec fourxm_decoder;
2181 extern AVCodec mdec_decoder;
2182 extern AVCodec roq_decoder;
2183 extern AVCodec interplay_video_decoder;
2184 extern AVCodec xan_wc3_decoder;
2185 extern AVCodec rpza_decoder;
2186 extern AVCodec cinepak_decoder;
2187 extern AVCodec msrle_decoder;
2188 extern AVCodec msvideo1_decoder;
2189 extern AVCodec vqa_decoder;
2190 extern AVCodec idcin_decoder;
2191 extern AVCodec eightbps_decoder;
2192 extern AVCodec smc_decoder;
2193 extern AVCodec flic_decoder;
2194 extern AVCodec vmdvideo_decoder;
2195 extern AVCodec vmdaudio_decoder;
2196 extern AVCodec truemotion1_decoder;
2197 extern AVCodec truemotion2_decoder;
2198 extern AVCodec mszh_decoder;
2199 extern AVCodec zlib_decoder;
2200 extern AVCodec ra_144_decoder;
2201 extern AVCodec ra_288_decoder;
2202 extern AVCodec roq_dpcm_decoder;
2203 extern AVCodec interplay_dpcm_decoder;
2204 extern AVCodec xan_dpcm_decoder;
2205 extern AVCodec sol_dpcm_decoder;
2206 extern AVCodec sonic_decoder;
2207 extern AVCodec qtrle_decoder;
2208 extern AVCodec flac_decoder;
2209 extern AVCodec tscc_decoder;
2210 extern AVCodec cscd_decoder;
2211 extern AVCodec ulti_decoder;
2212 extern AVCodec qdraw_decoder;
2213 extern AVCodec xl_decoder;
2214 extern AVCodec qpeg_decoder;
2215 extern AVCodec shorten_decoder;
2216 extern AVCodec loco_decoder;
2217 extern AVCodec wnv1_decoder;
2218 extern AVCodec aasc_decoder;
2219 extern AVCodec alac_decoder;
2220 extern AVCodec ws_snd1_decoder;
2221 extern AVCodec indeo2_decoder;
2222 extern AVCodec vorbis_decoder;
2223 extern AVCodec fraps_decoder;
2224 extern AVCodec libgsm_encoder;
2225 extern AVCodec libgsm_decoder;
2226 extern AVCodec bmp_decoder;
2227
2228 /* pcm codecs */
2229 #define PCM_CODEC(id, name) \
2230 extern AVCodec name ## _decoder; \
2231 extern AVCodec name ## _encoder
2232
2233 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2234 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2235 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2236 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2237 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2238 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2239 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2240 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2241 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2242 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2243 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2244 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2245 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2246 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2247 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2248 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2249 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2250
2251 /* adpcm codecs */
2252
2253 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2254 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2255 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2256 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2257 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2258 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2259 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2260 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2261 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2262 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2263 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2264 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2265 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2266 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2267 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2268
2269 #undef PCM_CODEC
2270
2271 /* dummy raw video codec */
2272 extern AVCodec rawvideo_encoder;
2273 extern AVCodec rawvideo_decoder;
2274
2275 /* the following codecs use external GPL libs */
2276 extern AVCodec ac3_decoder;
2277 extern AVCodec dts_decoder;
2278
2279 /* subtitles */
2280 extern AVCodec dvdsub_encoder;
2281 extern AVCodec dvdsub_decoder;
2282 extern AVCodec dvbsub_encoder;
2283 extern AVCodec dvbsub_decoder;
2284
2285 /* resample.c */
2286
2287 struct ReSampleContext;
2288 struct AVResampleContext;
2289
2290 typedef struct ReSampleContext ReSampleContext;
2291
2292 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2293                                      int output_rate, int input_rate);
2294 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2295 void audio_resample_close(ReSampleContext *s);
2296
2297 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2298 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2299 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2300 void av_resample_close(struct AVResampleContext *c);
2301
2302 /* YUV420 format is assumed ! */
2303
2304 struct ImgReSampleContext;
2305
2306 typedef struct ImgReSampleContext ImgReSampleContext;
2307
2308 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2309                                       int input_width, int input_height);
2310
2311 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2312                                       int iwidth, int iheight,
2313                                       int topBand, int bottomBand,
2314                                       int leftBand, int rightBand,
2315                                       int padtop, int padbottom,
2316                                       int padleft, int padright);
2317
2318
2319 void img_resample(ImgReSampleContext *s,
2320                   AVPicture *output, const AVPicture *input);
2321
2322 void img_resample_close(ImgReSampleContext *s);
2323
2324 /**
2325  * Allocate memory for a picture.  Call avpicture_free to free it.
2326  *
2327  * @param picture the picture to be filled in.
2328  * @param pix_fmt the format of the picture.
2329  * @param width the width of the picture.
2330  * @param height the height of the picture.
2331  * @return 0 if successful, -1 if not.
2332  */
2333 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2334
2335 /* Free a picture previously allocated by avpicture_alloc. */
2336 void avpicture_free(AVPicture *picture);
2337
2338 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2339                    int pix_fmt, int width, int height);
2340 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2341                      unsigned char *dest, int dest_size);
2342 int avpicture_get_size(int pix_fmt, int width, int height);
2343 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2344 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2345 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2346 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2347 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2348
2349 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
2350 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
2351 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
2352 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
2353 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
2354 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2355
2356 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2357                              int has_alpha);
2358 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2359                               int has_alpha, int *loss_ptr);
2360
2361 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2362 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2363 int img_get_alpha_info(const AVPicture *src,
2364                        int pix_fmt, int width, int height);
2365
2366 /* convert among pixel formats */
2367 int img_convert(AVPicture *dst, int dst_pix_fmt,
2368                 const AVPicture *src, int pix_fmt,
2369                 int width, int height);
2370
2371 /* deinterlace a picture */
2372 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2373                           int pix_fmt, int width, int height);
2374
2375 /* external high level API */
2376
2377 extern AVCodec *first_avcodec;
2378
2379 /* returns LIBAVCODEC_VERSION_INT constant */
2380 unsigned avcodec_version(void);
2381 /* returns LIBAVCODEC_BUILD constant */
2382 unsigned avcodec_build(void);
2383 void avcodec_init(void);
2384
2385 void register_avcodec(AVCodec *format);
2386 AVCodec *avcodec_find_encoder(enum CodecID id);
2387 AVCodec *avcodec_find_encoder_by_name(const char *name);
2388 AVCodec *avcodec_find_decoder(enum CodecID id);
2389 AVCodec *avcodec_find_decoder_by_name(const char *name);
2390 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2391
2392 void avcodec_get_context_defaults(AVCodecContext *s);
2393 AVCodecContext *avcodec_alloc_context(void);
2394 void avcodec_get_frame_defaults(AVFrame *pic);
2395 AVFrame *avcodec_alloc_frame(void);
2396
2397 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2398 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2399 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2400 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2401 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2402 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2403
2404 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2405 void avcodec_thread_free(AVCodecContext *s);
2406 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2407 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2408 //FIXME func typedef
2409
2410 /**
2411  * opens / inits the AVCodecContext.
2412  * not thread save!
2413  */
2414 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2415
2416 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2417                          int *frame_size_ptr,
2418                          uint8_t *buf, int buf_size);
2419 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2420                          int *got_picture_ptr,
2421                          uint8_t *buf, int buf_size);
2422 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2423                             int *got_sub_ptr,
2424                             const uint8_t *buf, int buf_size);
2425 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2426                         int *data_size_ptr,
2427                         uint8_t *buf, int buf_size);
2428 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2429                          const short *samples);
2430 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2431                          const AVFrame *pict);
2432 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2433                             const AVSubtitle *sub);
2434
2435 int avcodec_close(AVCodecContext *avctx);
2436
2437 void avcodec_register_all(void);
2438
2439 void avcodec_flush_buffers(AVCodecContext *avctx);
2440
2441 void avcodec_default_free_buffers(AVCodecContext *s);
2442
2443 /* misc usefull functions */
2444
2445 /**
2446  * returns a single letter to describe the picture type
2447  */
2448 char av_get_pict_type_char(int pict_type);
2449
2450
2451 /* frame parsing */
2452 typedef struct AVCodecParserContext {
2453     void *priv_data;
2454     struct AVCodecParser *parser;
2455     int64_t frame_offset; /* offset of the current frame */
2456     int64_t cur_offset; /* current offset
2457                            (incremented by each av_parser_parse()) */
2458     int64_t last_frame_offset; /* offset of the last frame */
2459     /* video info */
2460     int pict_type; /* XXX: put it back in AVCodecContext */
2461     int repeat_pict; /* XXX: put it back in AVCodecContext */
2462     int64_t pts;     /* pts of the current frame */
2463     int64_t dts;     /* dts of the current frame */
2464
2465     /* private data */
2466     int64_t last_pts;
2467     int64_t last_dts;
2468     int fetch_timestamp;
2469
2470 #define AV_PARSER_PTS_NB 4
2471     int cur_frame_start_index;
2472     int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2473     int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2474     int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2475
2476     int flags;
2477 #define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2478 } AVCodecParserContext;
2479
2480 typedef struct AVCodecParser {
2481     int codec_ids[5]; /* several codec IDs are permitted */
2482     int priv_data_size;
2483     int (*parser_init)(AVCodecParserContext *s);
2484     int (*parser_parse)(AVCodecParserContext *s,
2485                         AVCodecContext *avctx,
2486                         uint8_t **poutbuf, int *poutbuf_size,
2487                         const uint8_t *buf, int buf_size);
2488     void (*parser_close)(AVCodecParserContext *s);
2489     int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2490     struct AVCodecParser *next;
2491 } AVCodecParser;
2492
2493 extern AVCodecParser *av_first_parser;
2494
2495 void av_register_codec_parser(AVCodecParser *parser);
2496 AVCodecParserContext *av_parser_init(int codec_id);
2497 int av_parser_parse(AVCodecParserContext *s,
2498                     AVCodecContext *avctx,
2499                     uint8_t **poutbuf, int *poutbuf_size,
2500                     const uint8_t *buf, int buf_size,
2501                     int64_t pts, int64_t dts);
2502 int av_parser_change(AVCodecParserContext *s,
2503                      AVCodecContext *avctx,
2504                      uint8_t **poutbuf, int *poutbuf_size,
2505                      const uint8_t *buf, int buf_size, int keyframe);
2506 void av_parser_close(AVCodecParserContext *s);
2507
2508 extern AVCodecParser mpegvideo_parser;
2509 extern AVCodecParser mpeg4video_parser;
2510 extern AVCodecParser h261_parser;
2511 extern AVCodecParser h263_parser;
2512 extern AVCodecParser h264_parser;
2513 extern AVCodecParser mjpeg_parser;
2514 extern AVCodecParser pnm_parser;
2515 extern AVCodecParser mpegaudio_parser;
2516 extern AVCodecParser ac3_parser;
2517 extern AVCodecParser dvdsub_parser;
2518 extern AVCodecParser dvbsub_parser;
2519 extern AVCodecParser aac_parser;
2520
2521 /* memory */
2522 void *av_malloc(unsigned int size);
2523 void *av_mallocz(unsigned int size);
2524 void *av_realloc(void *ptr, unsigned int size);
2525 void av_free(void *ptr);
2526 char *av_strdup(const char *s);
2527 void av_freep(void *ptr);
2528 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2529 /* for static data only */
2530 /* call av_free_static to release all staticaly allocated tables */
2531 void av_free_static(void);
2532 void *av_mallocz_static(unsigned int size);
2533 void *av_realloc_static(void *ptr, unsigned int size);
2534
2535 /* add by bero : in adx.c */
2536 int is_adx(const unsigned char *buf,size_t bufsize);
2537
2538 void img_copy(AVPicture *dst, const AVPicture *src,
2539               int pix_fmt, int width, int height);
2540
2541 /* av_log API */
2542
2543 #include <stdarg.h>
2544
2545 #define AV_LOG_QUIET -1
2546 #define AV_LOG_ERROR 0
2547 #define AV_LOG_INFO 1
2548 #define AV_LOG_DEBUG 2
2549
2550 #ifdef __GNUC__
2551 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2552 #else
2553 extern void av_log(void*, int level, const char *fmt, ...);
2554 #endif
2555
2556 extern void av_vlog(void*, int level, const char *fmt, va_list);
2557 extern int av_log_get_level(void);
2558 extern void av_log_set_level(int);
2559 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2560
2561 /* endian macros */
2562 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2563 #define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2564 #define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
2565                    (((uint8_t*)(x))[1] << 16) | \
2566                    (((uint8_t*)(x))[2] << 8) | \
2567                     ((uint8_t*)(x))[3])
2568 #define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2569 #define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
2570                    (((uint8_t*)(x))[2] << 16) | \
2571                    (((uint8_t*)(x))[1] << 8) | \
2572                     ((uint8_t*)(x))[0])
2573 #endif
2574
2575 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2576
2577 #ifdef __cplusplus
2578 }
2579 #endif
2580
2581 #endif /* AVCODEC_H */