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)+(8<<8)+0)
  25 #define LIBAVCODEC_VERSION      51.8.0
  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     CODEC_ID_MMVIDEO,
 119     CODEC_ID_ZMBV,
 120     CODEC_ID_AVS,
 121     CODEC_ID_SMACKVIDEO,
 122
 123     /* various pcm "codecs" */
 124     CODEC_ID_PCM_S16LE= 0x10000,
 125     CODEC_ID_PCM_S16BE,
 126     CODEC_ID_PCM_U16LE,
 127     CODEC_ID_PCM_U16BE,
 128     CODEC_ID_PCM_S8,
 129     CODEC_ID_PCM_U8,
 130     CODEC_ID_PCM_MULAW,
 131     CODEC_ID_PCM_ALAW,
 132     CODEC_ID_PCM_S32LE,
 133     CODEC_ID_PCM_S32BE,
 134     CODEC_ID_PCM_U32LE,
 135     CODEC_ID_PCM_U32BE,
 136     CODEC_ID_PCM_S24LE,
 137     CODEC_ID_PCM_S24BE,
 138     CODEC_ID_PCM_U24LE,
 139     CODEC_ID_PCM_U24BE,
 140     CODEC_ID_PCM_S24DAUD,
 141
 142     /* various adpcm codecs */
 143     CODEC_ID_ADPCM_IMA_QT= 0x11000,
 144     CODEC_ID_ADPCM_IMA_WAV,
 145     CODEC_ID_ADPCM_IMA_DK3,
 146     CODEC_ID_ADPCM_IMA_DK4,
 147     CODEC_ID_ADPCM_IMA_WS,
 148     CODEC_ID_ADPCM_IMA_SMJPEG,
 149     CODEC_ID_ADPCM_MS,
 150     CODEC_ID_ADPCM_4XM,
 151     CODEC_ID_ADPCM_XA,
 152     CODEC_ID_ADPCM_ADX,
 153     CODEC_ID_ADPCM_EA,
 154     CODEC_ID_ADPCM_G726,
 155     CODEC_ID_ADPCM_CT,
 156     CODEC_ID_ADPCM_SWF,
 157     CODEC_ID_ADPCM_YAMAHA,
 158     CODEC_ID_ADPCM_SBPRO_4,
 159     CODEC_ID_ADPCM_SBPRO_3,
 160     CODEC_ID_ADPCM_SBPRO_2,
 161
 162     /* AMR */
 163     CODEC_ID_AMR_NB= 0x12000,
 164     CODEC_ID_AMR_WB,
 165
 166     /* RealAudio codecs*/
 167     CODEC_ID_RA_144= 0x13000,
 168     CODEC_ID_RA_288,
 169
 170     /* various DPCM codecs */
 171     CODEC_ID_ROQ_DPCM= 0x14000,
 172     CODEC_ID_INTERPLAY_DPCM,
 173     CODEC_ID_XAN_DPCM,
 174     CODEC_ID_SOL_DPCM,
 175
 176     CODEC_ID_MP2= 0x15000,
 177     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
 178     CODEC_ID_AAC,
 179     CODEC_ID_MPEG4AAC,
 180     CODEC_ID_AC3,
 181     CODEC_ID_DTS,
 182     CODEC_ID_VORBIS,
 183     CODEC_ID_DVAUDIO,
 184     CODEC_ID_WMAV1,
 185     CODEC_ID_WMAV2,
 186     CODEC_ID_MACE3,
 187     CODEC_ID_MACE6,
 188     CODEC_ID_VMDAUDIO,
 189     CODEC_ID_SONIC,
 190     CODEC_ID_SONIC_LS,
 191     CODEC_ID_FLAC,
 192     CODEC_ID_MP3ADU,
 193     CODEC_ID_MP3ON4,
 194     CODEC_ID_SHORTEN,
 195     CODEC_ID_ALAC,
 196     CODEC_ID_WESTWOOD_SND1,
 197     CODEC_ID_GSM,
 198     CODEC_ID_QDM2,
 199     CODEC_ID_COOK,
 200     CODEC_ID_TRUESPEECH,
 201     CODEC_ID_TTA,
 202     CODEC_ID_SMACKAUDIO,
 203
 204     CODEC_ID_OGGTHEORA= 0x16000,
 205
 206     /* subtitle codecs */
 207     CODEC_ID_DVD_SUBTITLE= 0x17000,
 208     CODEC_ID_DVB_SUBTITLE,
 209
 210     CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
 211                          stream (only used by libavformat) */
 212 };
 213
 214 /* CODEC_ID_MP3LAME is absolete */
 215 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 216
 217 enum CodecType {
 218     CODEC_TYPE_UNKNOWN = -1,
 219     CODEC_TYPE_VIDEO,
 220     CODEC_TYPE_AUDIO,
 221     CODEC_TYPE_DATA,
 222     CODEC_TYPE_SUBTITLE,
 223 };
 224
 225 /**
 226  * Pixel format. Notes:
 227  *
 228  * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
 229  * color is put together as:
 230  *  (A << 24) | (R << 16) | (G << 8) | B
 231  * This is stored as BGRA on little endian CPU architectures and ARGB on
 232  * big endian CPUs.
 233  *
 234  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
 235  * image data is stored in AVFrame.data[0]. The palette is transported in
 236  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
 237  * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
 238  * also endian-specific). Note also that the individual RGB palette
 239  * components stored in AVFrame.data[1] should be in the range 0..255.
 240  * This is important as many custom PAL8 video codecs that were designed
 241  * to run on the IBM VGA graphics adapter use 6-bit palette components.
 242  */
 243 enum PixelFormat {
 244     PIX_FMT_NONE= -1,
 245     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
 246     PIX_FMT_YUV422,    ///< Packed pixel, Y0 Cb Y1 Cr
 247     PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
 248     PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
 249     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
 250     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
 251     PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
 252     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
 253     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
 254     PIX_FMT_RGB565,    ///< always stored in cpu endianness
 255     PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
 256     PIX_FMT_GRAY8,
 257     PIX_FMT_MONOWHITE, ///< 0 is white
 258     PIX_FMT_MONOBLACK, ///< 0 is black
 259     PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
 260     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
 261     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
 262     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
 263     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
 264     PIX_FMT_XVMC_MPEG2_IDCT,
 265     PIX_FMT_UYVY422,   ///< Packed pixel, Cb Y0 Cr Y1
 266     PIX_FMT_UYVY411,   ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
 267     PIX_FMT_NB,
 268 };
 269
 270 /* currently unused, may be used if 24/32 bits samples ever supported */
 271 /* all in native endian */
 272 enum SampleFormat {
 273     SAMPLT_FMT_NONE = -1,
 274     SAMPLE_FMT_U8,              ///< unsigned 8 bits
 275     SAMPLE_FMT_S16,             ///< signed 16 bits
 276     SAMPLE_FMT_S24,             ///< signed 24 bits
 277     SAMPLE_FMT_S32,             ///< signed 32 bits
 278     SAMPLE_FMT_FLT,             ///< float
 279 };
 280
 281 /* in bytes */
 282 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
 283
 284 /**
 285  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 286  * this is mainly needed because some optimized bitstream readers read
 287  * 32 or 64 bit at once and could read over the end<br>
 288  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 289  * MPEG bitstreams could cause overread and segfault
 290  */
 291 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 292
 293 /**
 294  * minimum encoding buffer size.
 295  * used to avoid some checks during header writing
 296  */
 297 #define FF_MIN_BUFFER_SIZE 16384
 298
 299 /* motion estimation type, EPZS by default */
 300 enum Motion_Est_ID {
 301     ME_ZERO = 1,
 302     ME_FULL,
 303     ME_LOG,
 304     ME_PHODS,
 305     ME_EPZS,
 306     ME_X1,
 307     ME_HEX,
 308     ME_UMH,
 309     ME_ITER,
 310 };
 311
 312 enum AVDiscard{
 313 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
 314     AVDISCARD_NONE   =-16, ///< discard nothing
 315     AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
 316     AVDISCARD_NONREF =  8, ///< discard all non reference
 317     AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
 318     AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
 319     AVDISCARD_ALL    = 48, ///< discard all
 320 };
 321
 322 typedef struct RcOverride{
 323     int start_frame;
 324     int end_frame;
 325     int qscale; // if this is 0 then quality_factor will be used instead
 326     float quality_factor;
 327 } RcOverride;
 328
 329 /* only for ME compatiblity with old apps */
 330 extern int motion_estimation_method;
 331
 332 #define FF_MAX_B_FRAMES 16
 333
 334 /* encoding support
 335    these flags can be passed in AVCodecContext.flags before initing
 336    Note: not everything is supported yet.
 337 */
 338
 339 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 340 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
 341 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 342 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 343 #define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0>
 344 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 345 /* parent program gurantees that the input for b-frame containing streams is not written to
 346    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 347 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 348 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 349 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 350 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 351 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 352 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
 353 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 354 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 355                                             of only at frame boundaries */
 356 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 357 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 358 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 359 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 360 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 361 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 362 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 363 /* Fx : Flag for h263+ extra options */
 364 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
 365 #define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
 366 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 367 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 368 #define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
 369 #define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
 370 #define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
 371 #define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
 372 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 373 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
 374 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
 375 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 376 #define CODEC_FLAG2_FAST          0x00000001 ///< allow non spec compliant speedup tricks
 377 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< strictly enforce GOP size
 378 #define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< skip bitstream encoding
 379 #define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< place global headers at every keyframe instead of in extradata
 380 #define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow b-frames to be used as references
 381 #define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for b-frames
 382 #define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 multiple references per partition
 383 #define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
 384 #define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
 385 #define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
 386 #define CODEC_FLAG2_BRDO          0x00000400 ///< b-frame rate-distortion optimization
 387
 388 /* Unsupported options :
 389  *              Syntax Arithmetic coding (SAC)
 390  *              Reference Picture Selection
 391  *              Independant Segment Decoding */
 392 /* /Fx */
 393 /* codec capabilities */
 394
 395 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 396 /**
 397  * Codec uses get_buffer() for allocating buffers.
 398  * direct rendering method 1
 399  */
 400 #define CODEC_CAP_DR1             0x0002
 401 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 402    used */
 403 #define CODEC_CAP_PARSE_ONLY      0x0004
 404 #define CODEC_CAP_TRUNCATED       0x0008
 405 /* codec can export data for HW decoding (XvMC) */
 406 #define CODEC_CAP_HWACCEL         0x0010
 407 /**
 408  * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
 409  * if this is not set, the codec is guranteed to never be feeded with NULL data
 410  */
 411 #define CODEC_CAP_DELAY           0x0020
 412
 413 //the following defines may change, don't expect compatibility if you use them
 414 #define MB_TYPE_INTRA4x4   0x0001
 415 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
 416 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
 417 #define MB_TYPE_16x16      0x0008
 418 #define MB_TYPE_16x8       0x0010
 419 #define MB_TYPE_8x16       0x0020
 420 #define MB_TYPE_8x8        0x0040
 421 #define MB_TYPE_INTERLACED 0x0080
 422 #define MB_TYPE_DIRECT2     0x0100 //FIXME
 423 #define MB_TYPE_ACPRED     0x0200
 424 #define MB_TYPE_GMC        0x0400
 425 #define MB_TYPE_SKIP       0x0800
 426 #define MB_TYPE_P0L0       0x1000
 427 #define MB_TYPE_P1L0       0x2000
 428 #define MB_TYPE_P0L1       0x4000
 429 #define MB_TYPE_P1L1       0x8000
 430 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 431 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 432 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 433 #define MB_TYPE_QUANT      0x00010000
 434 #define MB_TYPE_CBP        0x00020000
 435 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
 436
 437 /**
 438  * Pan Scan area.
 439  * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
 440  */
 441 typedef struct AVPanScan{
 442     /**
 443      * id.
 444      * - encoding: set by user.
 445      * - decoding: set by lavc
 446      */
 447     int id;
 448
 449     /**
 450      * width and height in 1/16 pel
 451      * - encoding: set by user.
 452      * - decoding: set by lavc
 453      */
 454     int width;
 455     int height;
 456
 457     /**
 458      * position of the top left corner in 1/16 pel for up to 3 fields/frames.
 459      * - encoding: set by user.
 460      * - decoding: set by lavc
 461      */
 462     int16_t position[3][2];
 463 }AVPanScan;
 464
 465 #define FF_COMMON_FRAME \
 466     /**\
 467      * pointer to the picture planes.\
 468      * this might be different from the first allocated byte\
 469      * - encoding: \
 470      * - decoding: \
 471      */\
 472     uint8_t *data[4];\
 473     int linesize[4];\
 474     /**\
 475      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 476      * this isn't used by lavc unless the default get/release_buffer() is used\
 477      * - encoding: \
 478      * - decoding: \
 479      */\
 480     uint8_t *base[4];\
 481     /**\
 482      * 1 -> keyframe, 0-> not\
 483      * - encoding: set by lavc\
 484      * - decoding: set by lavc\
 485      */\
 486     int key_frame;\
 487 \
 488     /**\
 489      * picture type of the frame, see ?_TYPE below.\
 490      * - encoding: set by lavc for coded_picture (and set by user for input)\
 491      * - decoding: set by lavc\
 492      */\
 493     int pict_type;\
 494 \
 495     /**\
 496      * presentation timestamp in time_base units (time when frame should be shown to user)\
 497      * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
 498      * - encoding: MUST be set by user\
 499      * - decoding: set by lavc\
 500      */\
 501     int64_t pts;\
 502 \
 503     /**\
 504      * picture number in bitstream order.\
 505      * - encoding: set by\
 506      * - decoding: set by lavc\
 507      */\
 508     int coded_picture_number;\
 509     /**\
 510      * picture number in display order.\
 511      * - encoding: set by\
 512      * - decoding: set by lavc\
 513      */\
 514     int display_picture_number;\
 515 \
 516     /**\
 517      * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
 518      * - encoding: set by lavc for coded_picture (and set by user for input)\
 519      * - decoding: set by lavc\
 520      */\
 521     int quality; \
 522 \
 523     /**\
 524      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 525      * set to INT_MAX if the buffer has not been used yet \
 526      * - encoding: unused\
 527      * - decoding: MUST be set by get_buffer()\
 528      */\
 529     int age;\
 530 \
 531     /**\
 532      * is this picture used as reference\
 533      * - encoding: unused\
 534      * - decoding: set by lavc (before get_buffer() call))\
 535      */\
 536     int reference;\
 537 \
 538     /**\
 539      * QP table\
 540      * - encoding: unused\
 541      * - decoding: set by lavc\
 542      */\
 543     int8_t *qscale_table;\
 544     /**\
 545      * QP store stride\
 546      * - encoding: unused\
 547      * - decoding: set by lavc\
 548      */\
 549     int qstride;\
 550 \
 551     /**\
 552      * mbskip_table[mb]>=1 if MB didnt change\
 553      * stride= mb_width = (width+15)>>4\
 554      * - encoding: unused\
 555      * - decoding: set by lavc\
 556      */\
 557     uint8_t *mbskip_table;\
 558 \
 559     /**\
 560      * Motion vector table.\
 561      * @code\
 562      * example:\
 563      * int mv_sample_log2= 4 - motion_subsample_log2;\
 564      * int mb_width= (width+15)>>4;\
 565      * int mv_stride= (mb_width << mv_sample_log2) + 1;\
 566      * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
 567      * @endcode\
 568      * - encoding: set by user\
 569      * - decoding: set by lavc\
 570      */\
 571     int16_t (*motion_val[2])[2];\
 572 \
 573     /**\
 574      * Macroblock type table\
 575      * mb_type_base + mb_width + 2\
 576      * - encoding: set by user\
 577      * - decoding: set by lavc\
 578      */\
 579     uint32_t *mb_type;\
 580 \
 581     /**\
 582      * log2 of the size of the block which a single vector in motion_val represents: \
 583      * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
 584      * - encoding: unused\
 585      * - decoding: set by lavc\
 586      */\
 587     uint8_t motion_subsample_log2;\
 588 \
 589     /**\
 590      * for some private data of the user\
 591      * - encoding: unused\
 592      * - decoding: set by user\
 593      */\
 594     void *opaque;\
 595 \
 596     /**\
 597      * error\
 598      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 599      * - decoding: unused\
 600      */\
 601     uint64_t error[4];\
 602 \
 603     /**\
 604      * type of the buffer (to keep track of who has to dealloc data[*])\
 605      * - encoding: set by the one who allocs it\
 606      * - decoding: set by the one who allocs it\
 607      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 608      */\
 609     int type;\
 610     \
 611     /**\
 612      * when decoding, this signal how much the picture must be delayed.\
 613      * extra_delay = repeat_pict / (2*fps)\
 614      * - encoding: unused\
 615      * - decoding: set by lavc\
 616      */\
 617     int repeat_pict;\
 618     \
 619     /**\
 620      * \
 621      */\
 622     int qscale_type;\
 623     \
 624     /**\
 625      * The content of the picture is interlaced.\
 626      * - encoding: set by user\
 627      * - decoding: set by lavc (default 0)\
 628      */\
 629     int interlaced_frame;\
 630     \
 631     /**\
 632      * if the content is interlaced, is top field displayed first.\
 633      * - encoding: set by user\
 634      * - decoding: set by lavc\
 635      */\
 636     int top_field_first;\
 637     \
 638     /**\
 639      * Pan scan.\
 640      * - encoding: set by user\
 641      * - decoding: set by lavc\
 642      */\
 643     AVPanScan *pan_scan;\
 644     \
 645     /**\
 646      * tell user application that palette has changed from previous frame.\
 647      * - encoding: ??? (no palette-enabled encoder yet)\
 648      * - decoding: set by lavc (default 0)\
 649      */\
 650     int palette_has_changed;\
 651     \
 652     /**\
 653      * Codec suggestion on buffer type if != 0\
 654      * - encoding: unused\
 655      * - decoding: set by lavc (before get_buffer() call))\
 656      */\
 657     int buffer_hints;\
 658 \
 659     /**\
 660      * DCT coeffitients\
 661      * - encoding: unused\
 662      * - decoding: set by lavc\
 663      */\
 664     short *dct_coeff;\
 665 \
 666     /**\
 667      * Motion referece frame index\
 668      * - encoding: set by user\
 669      * - decoding: set by lavc\
 670      */\
 671     int8_t *ref_index[2];
 672
 673 #define FF_QSCALE_TYPE_MPEG1 0
 674 #define FF_QSCALE_TYPE_MPEG2 1
 675 #define FF_QSCALE_TYPE_H264  2
 676
 677 #define FF_BUFFER_TYPE_INTERNAL 1
 678 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 679 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
 680 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
 681
 682
 683 #define FF_I_TYPE 1 // Intra
 684 #define FF_P_TYPE 2 // Predicted
 685 #define FF_B_TYPE 3 // Bi-dir predicted
 686 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 687 #define FF_SI_TYPE 5
 688 #define FF_SP_TYPE 6
 689
 690 #define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
 691 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
 692 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
 693 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
 694
 695 /**
 696  * Audio Video Frame.
 697  */
 698 typedef struct AVFrame {
 699     FF_COMMON_FRAME
 700 } AVFrame;
 701
 702 #define DEFAULT_FRAME_RATE_BASE 1001000
 703
 704 /**
 705  * Used by av_log
 706  */
 707 typedef struct AVCLASS AVClass;
 708 struct AVCLASS {
 709     const char* class_name;
 710     const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
 711                                         or AVFormatContext, which begin with an AVClass.
 712                                         Needed because av_log is in libavcodec and has no visibility
 713                                         of AVIn/OutputFormat */
 714     struct AVOption *option;
 715 };
 716
 717 /**
 718  * main external api structure.
 719  */
 720 typedef struct AVCodecContext {
 721     /**
 722      * Info on struct for av_log
 723      * - set by avcodec_alloc_context
 724      */
 725     AVClass *av_class;
 726     /**
 727      * the average bitrate.
 728      * - encoding: set by user. unused for constant quantizer encoding
 729      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 730      */
 731     int bit_rate;
 732
 733     /**
 734      * number of bits the bitstream is allowed to diverge from the reference.
 735      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 736      * - encoding: set by user. unused for constant quantizer encoding
 737      * - decoding: unused
 738      */
 739     int bit_rate_tolerance;
 740
 741     /**
 742      * CODEC_FLAG_*.
 743      * - encoding: set by user.
 744      * - decoding: set by user.
 745      */
 746     int flags;
 747
 748     /**
 749      * some codecs needs additionnal format info. It is stored here
 750      * - encoding: set by user.
 751      * - decoding: set by lavc. (FIXME is this ok?)
 752      */
 753     int sub_id;
 754
 755     /**
 756      * motion estimation algorithm used for video coding.
 757      * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
 758      * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
 759      * - encoding: MUST be set by user.
 760      * - decoding: unused
 761      */
 762     int me_method;
 763
 764     /**
 765      * some codecs need / can use extra-data like huffman tables.
 766      * mjpeg: huffman tables
 767      * rv10: additional flags
 768      * mpeg4: global headers (they can be in the bitstream or here)
 769      * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
 770      * then extradata_size to avoid prolems if its read with the bitstream reader
 771      * the bytewise contents of extradata must not depend on the architecture or cpu endianness
 772      * - encoding: set/allocated/freed by lavc.
 773      * - decoding: set/allocated/freed by user.
 774      */
 775     void *extradata;
 776     int extradata_size;
 777
 778     /**
 779      * this is the fundamental unit of time (in seconds) in terms
 780      * of which frame timestamps are represented. for fixed-fps content,
 781      * timebase should be 1/framerate and timestamp increments should be
 782      * identically 1.
 783      * - encoding: MUST be set by user
 784      * - decoding: set by lavc.
 785      */
 786     AVRational time_base;
 787
 788     /* video only */
 789     /**
 790      * picture width / height.
 791      * - encoding: MUST be set by user.
 792      * - decoding: set by lavc.
 793      * Note, for compatibility its possible to set this instead of
 794      * coded_width/height before decoding
 795      */
 796     int width, height;
 797
 798 #define FF_ASPECT_EXTENDED 15
 799
 800     /**
 801      * the number of pictures in a group of pitures, or 0 for intra_only.
 802      * - encoding: set by user.
 803      * - decoding: unused
 804      */
 805     int gop_size;
 806
 807     /**
 808      * pixel format, see PIX_FMT_xxx.
 809      * - encoding: set by user.
 810      * - decoding: set by lavc.
 811      */
 812     enum PixelFormat pix_fmt;
 813
 814     /**
 815      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 816      * has to read frames at native frame rate.
 817      * - encoding: set by user.
 818      * - decoding: unused.
 819      */
 820     int rate_emu;
 821
 822     /**
 823      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 824      * decoder to draw an horizontal band. It improve cache usage. Not
 825      * all codecs can do that. You must check the codec capabilities
 826      * before
 827      * - encoding: unused
 828      * - decoding: set by user.
 829      * @param height the height of the slice
 830      * @param y the y position of the slice
 831      * @param type 1->top field, 2->bottom field, 3->frame
 832      * @param offset offset into the AVFrame.data from which the slice should be read
 833      */
 834     void (*draw_horiz_band)(struct AVCodecContext *s,
 835                             const AVFrame *src, int offset[4],
 836                             int y, int type, int height);
 837
 838     /* audio only */
 839     int sample_rate; ///< samples per sec
 840     int channels;
 841
 842     /**
 843      * audio sample format.
 844      * - encoding: set by user.
 845      * - decoding: set by lavc.
 846      */
 847     enum SampleFormat sample_fmt;  ///< sample format, currenly unused
 848
 849     /* the following data should not be initialized */
 850     /**
 851      * samples per packet. initialized when calling 'init'
 852      */
 853     int frame_size;
 854     int frame_number;   ///< audio or video frame number
 855     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 856
 857     /**
 858      * number of frames the decoded output will be delayed relative to
 859      * the encoded input.
 860      * - encoding: set by lavc.
 861      * - decoding: unused
 862      */
 863     int delay;
 864
 865     /* - encoding parameters */
 866     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 867     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 868
 869     /**
 870      * minimum quantizer.
 871      * - encoding: set by user.
 872      * - decoding: unused
 873      */
 874     int qmin;
 875
 876     /**
 877      * maximum quantizer.
 878      * - encoding: set by user.
 879      * - decoding: unused
 880      */
 881     int qmax;
 882
 883     /**
 884      * maximum quantizer difference etween frames.
 885      * - encoding: set by user.
 886      * - decoding: unused
 887      */
 888     int max_qdiff;
 889
 890     /**
 891      * maximum number of b frames between non b frames.
 892      * note: the output will be delayed by max_b_frames+1 relative to the input
 893      * - encoding: set by user.
 894      * - decoding: unused
 895      */
 896     int max_b_frames;
 897
 898     /**
 899      * qscale factor between ip and b frames.
 900      * - encoding: set by user.
 901      * - decoding: unused
 902      */
 903     float b_quant_factor;
 904
 905     /** obsolete FIXME remove */
 906     int rc_strategy;
 907 #define FF_RC_STRATEGY_XVID 1
 908
 909     int b_frame_strategy;
 910
 911     /**
 912      * hurry up amount.
 913      * deprecated in favor of skip_idct and skip_frame
 914      * - encoding: unused
 915      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 916      */
 917     int hurry_up;
 918
 919     struct AVCodec *codec;
 920
 921     void *priv_data;
 922
 923     /* unused, FIXME remove*/
 924     int rtp_mode;
 925
 926     int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
 927                             /* do it's best to deliver a chunk with size    */
 928                             /* below rtp_payload_size, the chunk will start */
 929                             /* with a start code on some codecs like H.263  */
 930                             /* This doesn't take account of any particular  */
 931                             /* headers inside the transmited RTP payload    */
 932
 933
 934     /* The RTP callback: This function is called   */
 935     /* every time the encoder has a packet to send */
 936     /* Depends on the encoder if the data starts   */
 937     /* with a Start Code (it should) H.263 does.   */
 938     /* mb_nb contains the number of macroblocks    */
 939     /* encoded in the RTP payload                  */
 940     void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
 941
 942     /* statistics, used for 2-pass encoding */
 943     int mv_bits;
 944     int header_bits;
 945     int i_tex_bits;
 946     int p_tex_bits;
 947     int i_count;
 948     int p_count;
 949     int skip_count;
 950     int misc_bits;
 951
 952     /**
 953      * number of bits used for the previously encoded frame.
 954      * - encoding: set by lavc
 955      * - decoding: unused
 956      */
 957     int frame_bits;
 958
 959     /**
 960      * private data of the user, can be used to carry app specific stuff.
 961      * - encoding: set by user
 962      * - decoding: set by user
 963      */
 964     void *opaque;
 965
 966     char codec_name[32];
 967     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 968     enum CodecID codec_id; /* see CODEC_ID_xxx */
 969
 970     /**
 971      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 972      * this is used to workaround some encoder bugs
 973      * - encoding: set by user, if not then the default based on codec_id will be used
 974      * - decoding: set by user, will be converted to upper case by lavc during init
 975      */
 976     unsigned int codec_tag;
 977
 978     /**
 979      * workaround bugs in encoders which sometimes cannot be detected automatically.
 980      * - encoding: set by user
 981      * - decoding: set by user
 982      */
 983     int workaround_bugs;
 984 #define FF_BUG_AUTODETECT       1  ///< autodetection
 985 #define FF_BUG_OLD_MSMPEG4      2
 986 #define FF_BUG_XVID_ILACE       4
 987 #define FF_BUG_UMP4             8
 988 #define FF_BUG_NO_PADDING       16
 989 #define FF_BUG_AMV              32
 990 #define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
 991 #define FF_BUG_QPEL_CHROMA      64
 992 #define FF_BUG_STD_QPEL         128
 993 #define FF_BUG_QPEL_CHROMA2     256
 994 #define FF_BUG_DIRECT_BLOCKSIZE 512
 995 #define FF_BUG_EDGE             1024
 996 #define FF_BUG_HPEL_CHROMA      2048
 997 #define FF_BUG_DC_CLIP          4096
 998 #define FF_BUG_MS               8192 ///< workaround various bugs in microsofts broken decoders
 999 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
1000
1001     /**
1002      * luma single coeff elimination threshold.
1003      * - encoding: set by user
1004      * - decoding: unused
1005      */
1006     int luma_elim_threshold;
1007
1008     /**
1009      * chroma single coeff elimination threshold.
1010      * - encoding: set by user
1011      * - decoding: unused
1012      */
1013     int chroma_elim_threshold;
1014
1015     /**
1016      * strictly follow the std (MPEG4, ...).
1017      * - encoding: set by user
1018      * - decoding: unused
1019      */
1020     int strict_std_compliance;
1021 #define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a older more strict version of the spec or reference software
1022 #define FF_COMPLIANCE_STRICT        1 ///< strictly conform to all the things in the spec no matter what consequences
1023 #define FF_COMPLIANCE_NORMAL        0
1024 #define FF_COMPLIANCE_INOFFICIAL   -1 ///< allow inofficial extensions
1025 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1026
1027     /**
1028      * qscale offset between ip and b frames.
1029      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1030      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1031      * - encoding: set by user.
1032      * - decoding: unused
1033      */
1034     float b_quant_offset;
1035
1036     /**
1037      * error resilience higher values will detect more errors but may missdetect
1038      * some more or less valid parts as errors.
1039      * - encoding: unused
1040      * - decoding: set by user
1041      */
1042     int error_resilience;
1043 #define FF_ER_CAREFUL         1
1044 #define FF_ER_COMPLIANT       2
1045 #define FF_ER_AGGRESSIVE      3
1046 #define FF_ER_VERY_AGGRESSIVE 4
1047
1048     /**
1049      * called at the beginning of each frame to get a buffer for it.
1050      * if pic.reference is set then the frame will be read later by lavc
1051      * avcodec_align_dimensions() should be used to find the required width and
1052      * height, as they normally need to be rounded up to the next multiple of 16
1053      * - encoding: unused
1054      * - decoding: set by lavc, user can override
1055      */
1056     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1057
1058     /**
1059      * called to release buffers which where allocated with get_buffer.
1060      * a released buffer can be reused in get_buffer()
1061      * pic.data[*] must be set to NULL
1062      * - encoding: unused
1063      * - decoding: set by lavc, user can override
1064      */
1065     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1066
1067     /**
1068      * if 1 the stream has a 1 frame delay during decoding.
1069      * - encoding: set by lavc
1070      * - decoding: set by lavc
1071      */
1072     int has_b_frames;
1073
1074     /**
1075      * number of bytes per packet if constant and known or 0
1076      * used by some WAV based audio codecs
1077      */
1078     int block_align;
1079
1080     int parse_only; /* - decoding only: if true, only parsing is done
1081                        (function avcodec_parse_frame()). The frame
1082                        data is returned. Only MPEG codecs support this now. */
1083
1084     /**
1085      * 0-> h263 quant 1-> mpeg quant.
1086      * - encoding: set by user.
1087      * - decoding: unused
1088      */
1089     int mpeg_quant;
1090
1091     /**
1092      * pass1 encoding statistics output buffer.
1093      * - encoding: set by lavc
1094      * - decoding: unused
1095      */
1096     char *stats_out;
1097
1098     /**
1099      * pass2 encoding statistics input buffer.
1100      * concatenated stuff from stats_out of pass1 should be placed here
1101      * - encoding: allocated/set/freed by user
1102      * - decoding: unused
1103      */
1104     char *stats_in;
1105
1106     /**
1107      * ratecontrol qmin qmax limiting method.
1108      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1109      * - encoding: set by user.
1110      * - decoding: unused
1111      */
1112     float rc_qsquish;
1113
1114     float rc_qmod_amp;
1115     int rc_qmod_freq;
1116
1117     /**
1118      * ratecontrol override, see RcOverride.
1119      * - encoding: allocated/set/freed by user.
1120      * - decoding: unused
1121      */
1122     RcOverride *rc_override;
1123     int rc_override_count;
1124
1125     /**
1126      * rate control equation.
1127      * - encoding: set by user
1128      * - decoding: unused
1129      */
1130     char *rc_eq;
1131
1132     /**
1133      * maximum bitrate.
1134      * - encoding: set by user.
1135      * - decoding: unused
1136      */
1137     int rc_max_rate;
1138
1139     /**
1140      * minimum bitrate.
1141      * - encoding: set by user.
1142      * - decoding: unused
1143      */
1144     int rc_min_rate;
1145
1146     /**
1147      * decoder bitstream buffer size.
1148      * - encoding: set by user.
1149      * - decoding: unused
1150      */
1151     int rc_buffer_size;
1152     float rc_buffer_aggressivity;
1153
1154     /**
1155      * qscale factor between p and i frames.
1156      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1157      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1158      * - encoding: set by user.
1159      * - decoding: unused
1160      */
1161     float i_quant_factor;
1162
1163     /**
1164      * qscale offset between p and i frames.
1165      * - encoding: set by user.
1166      * - decoding: unused
1167      */
1168     float i_quant_offset;
1169
1170     /**
1171      * initial complexity for pass1 ratecontrol.
1172      * - encoding: set by user.
1173      * - decoding: unused
1174      */
1175     float rc_initial_cplx;
1176
1177     /**
1178      * dct algorithm, see FF_DCT_* below.
1179      * - encoding: set by user
1180      * - decoding: unused
1181      */
1182     int dct_algo;
1183 #define FF_DCT_AUTO    0
1184 #define FF_DCT_FASTINT 1
1185 #define FF_DCT_INT     2
1186 #define FF_DCT_MMX     3
1187 #define FF_DCT_MLIB    4
1188 #define FF_DCT_ALTIVEC 5
1189 #define FF_DCT_FAAN    6
1190
1191     /**
1192      * luminance masking (0-> disabled).
1193      * - encoding: set by user
1194      * - decoding: unused
1195      */
1196     float lumi_masking;
1197
1198     /**
1199      * temporary complexity masking (0-> disabled).
1200      * - encoding: set by user
1201      * - decoding: unused
1202      */
1203     float temporal_cplx_masking;
1204
1205     /**
1206      * spatial complexity masking (0-> disabled).
1207      * - encoding: set by user
1208      * - decoding: unused
1209      */
1210     float spatial_cplx_masking;
1211
1212     /**
1213      * p block masking (0-> disabled).
1214      * - encoding: set by user
1215      * - decoding: unused
1216      */
1217     float p_masking;
1218
1219     /**
1220      * darkness masking (0-> disabled).
1221      * - encoding: set by user
1222      * - decoding: unused
1223      */
1224     float dark_masking;
1225
1226
1227     /* for binary compatibility */
1228     int unused;
1229
1230     /**
1231      * idct algorithm, see FF_IDCT_* below.
1232      * - encoding: set by user
1233      * - decoding: set by user
1234      */
1235     int idct_algo;
1236 #define FF_IDCT_AUTO         0
1237 #define FF_IDCT_INT          1
1238 #define FF_IDCT_SIMPLE       2
1239 #define FF_IDCT_SIMPLEMMX    3
1240 #define FF_IDCT_LIBMPEG2MMX  4
1241 #define FF_IDCT_PS2          5
1242 #define FF_IDCT_MLIB         6
1243 #define FF_IDCT_ARM          7
1244 #define FF_IDCT_ALTIVEC      8
1245 #define FF_IDCT_SH4          9
1246 #define FF_IDCT_SIMPLEARM    10
1247 #define FF_IDCT_H264         11
1248 #define FF_IDCT_VP3          12
1249 #define FF_IDCT_IPP          13
1250 #define FF_IDCT_XVIDMMX      14
1251
1252     /**
1253      * slice count.
1254      * - encoding: set by lavc
1255      * - decoding: set by user (or 0)
1256      */
1257     int slice_count;
1258     /**
1259      * slice offsets in the frame in bytes.
1260      * - encoding: set/allocated by lavc
1261      * - decoding: set/allocated by user (or NULL)
1262      */
1263     int *slice_offset;
1264
1265     /**
1266      * error concealment flags.
1267      * - encoding: unused
1268      * - decoding: set by user
1269      */
1270     int error_concealment;
1271 #define FF_EC_GUESS_MVS   1
1272 #define FF_EC_DEBLOCK     2
1273
1274     /**
1275      * dsp_mask could be add used to disable unwanted CPU features
1276      * CPU features (i.e. MMX, SSE. ...)
1277      *
1278      * with FORCE flag you may instead enable given CPU features
1279      * (Dangerous: usable in case of misdetection, improper usage however will
1280      * result into program crash)
1281      */
1282     unsigned dsp_mask;
1283 #define FF_MM_FORCE    0x80000000 /* force usage of selected flags (OR) */
1284     /* lower 16 bits - CPU features */
1285 #ifdef HAVE_MMX
1286 #define FF_MM_MMX      0x0001 /* standard MMX */
1287 #define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1288 #define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1289 #define FF_MM_SSE      0x0008 /* SSE functions */
1290 #define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1291 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1292 #endif /* HAVE_MMX */
1293 #ifdef HAVE_IWMMXT
1294 #define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1295 #endif /* HAVE_IWMMXT */
1296
1297     /**
1298      * bits per sample/pixel from the demuxer (needed for huffyuv).
1299      * - encoding: set by lavc
1300      * - decoding: set by user
1301      */
1302      int bits_per_sample;
1303
1304     /**
1305      * prediction method (needed for huffyuv).
1306      * - encoding: set by user
1307      * - decoding: unused
1308      */
1309      int prediction_method;
1310 #define FF_PRED_LEFT   0
1311 #define FF_PRED_PLANE  1
1312 #define FF_PRED_MEDIAN 2
1313
1314     /**
1315      * sample aspect ratio (0 if unknown).
1316      * numerator and denominator must be relative prime and smaller then 256 for some video standards
1317      * - encoding: set by user.
1318      * - decoding: set by lavc.
1319      */
1320     AVRational sample_aspect_ratio;
1321
1322     /**
1323      * the picture in the bitstream.
1324      * - encoding: set by lavc
1325      * - decoding: set by lavc
1326      */
1327     AVFrame *coded_frame;
1328
1329     /**
1330      * debug.
1331      * - encoding: set by user.
1332      * - decoding: set by user.
1333      */
1334     int debug;
1335 #define FF_DEBUG_PICT_INFO 1
1336 #define FF_DEBUG_RC        2
1337 #define FF_DEBUG_BITSTREAM 4
1338 #define FF_DEBUG_MB_TYPE   8
1339 #define FF_DEBUG_QP        16
1340 #define FF_DEBUG_MV        32
1341 #define FF_DEBUG_DCT_COEFF 0x00000040
1342 #define FF_DEBUG_SKIP      0x00000080
1343 #define FF_DEBUG_STARTCODE 0x00000100
1344 #define FF_DEBUG_PTS       0x00000200
1345 #define FF_DEBUG_ER        0x00000400
1346 #define FF_DEBUG_MMCO      0x00000800
1347 #define FF_DEBUG_BUGS      0x00001000
1348 #define FF_DEBUG_VIS_QP    0x00002000
1349 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1350
1351     /**
1352      * debug.
1353      * - encoding: set by user.
1354      * - decoding: set by user.
1355      */
1356     int debug_mv;
1357 #define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1358 #define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1359 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1360
1361     /**
1362      * error.
1363      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1364      * - decoding: unused
1365      */
1366     uint64_t error[4];
1367
1368     /**
1369      * minimum MB quantizer.
1370      * - encoding: unused
1371      * - decoding: unused
1372      */
1373     int mb_qmin;
1374
1375     /**
1376      * maximum MB quantizer.
1377      * - encoding: unused
1378      * - decoding: unused
1379      */
1380     int mb_qmax;
1381
1382     /**
1383      * motion estimation compare function.
1384      * - encoding: set by user.
1385      * - decoding: unused
1386      */
1387     int me_cmp;
1388     /**
1389      * subpixel motion estimation compare function.
1390      * - encoding: set by user.
1391      * - decoding: unused
1392      */
1393     int me_sub_cmp;
1394     /**
1395      * macroblock compare function (not supported yet).
1396      * - encoding: set by user.
1397      * - decoding: unused
1398      */
1399     int mb_cmp;
1400     /**
1401      * interlaced dct compare function
1402      * - encoding: set by user.
1403      * - decoding: unused
1404      */
1405     int ildct_cmp;
1406 #define FF_CMP_SAD  0
1407 #define FF_CMP_SSE  1
1408 #define FF_CMP_SATD 2
1409 #define FF_CMP_DCT  3
1410 #define FF_CMP_PSNR 4
1411 #define FF_CMP_BIT  5
1412 #define FF_CMP_RD   6
1413 #define FF_CMP_ZERO 7
1414 #define FF_CMP_VSAD 8
1415 #define FF_CMP_VSSE 9
1416 #define FF_CMP_NSSE 10
1417 #define FF_CMP_W53  11
1418 #define FF_CMP_W97  12
1419 #define FF_CMP_DCTMAX 13
1420 #define FF_CMP_DCT264 14
1421 #define FF_CMP_CHROMA 256
1422
1423     /**
1424      * ME diamond size & shape.
1425      * - encoding: set by user.
1426      * - decoding: unused
1427      */
1428     int dia_size;
1429
1430     /**
1431      * amount of previous MV predictors (2a+1 x 2a+1 square).
1432      * - encoding: set by user.
1433      * - decoding: unused
1434      */
1435     int last_predictor_count;
1436
1437     /**
1438      * pre pass for motion estimation.
1439      * - encoding: set by user.
1440      * - decoding: unused
1441      */
1442     int pre_me;
1443
1444     /**
1445      * motion estimation pre pass compare function.
1446      * - encoding: set by user.
1447      * - decoding: unused
1448      */
1449     int me_pre_cmp;
1450
1451     /**
1452      * ME pre pass diamond size & shape.
1453      * - encoding: set by user.
1454      * - decoding: unused
1455      */
1456     int pre_dia_size;
1457
1458     /**
1459      * subpel ME quality.
1460      * - encoding: set by user.
1461      * - decoding: unused
1462      */
1463     int me_subpel_quality;
1464
1465     /**
1466      * callback to negotiate the pixelFormat.
1467      * @param fmt is the list of formats which are supported by the codec,
1468      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1469      * the first is allways the native one
1470      * @return the choosen format
1471      * - encoding: unused
1472      * - decoding: set by user, if not set then the native format will always be choosen
1473      */
1474     enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1475
1476     /**
1477      * DTG active format information (additionnal aspect ratio
1478      * information only used in DVB MPEG2 transport streams). 0 if
1479      * not set.
1480      *
1481      * - encoding: unused.
1482      * - decoding: set by decoder
1483      */
1484     int dtg_active_format;
1485 #define FF_DTG_AFD_SAME         8
1486 #define FF_DTG_AFD_4_3          9
1487 #define FF_DTG_AFD_16_9         10
1488 #define FF_DTG_AFD_14_9         11
1489 #define FF_DTG_AFD_4_3_SP_14_9  13
1490 #define FF_DTG_AFD_16_9_SP_14_9 14
1491 #define FF_DTG_AFD_SP_4_3       15
1492
1493     /**
1494      * Maximum motion estimation search range in subpel units.
1495      * if 0 then no limit
1496      *
1497      * - encoding: set by user.
1498      * - decoding: unused.
1499      */
1500     int me_range;
1501
1502     /**
1503      * intra quantizer bias.
1504      * - encoding: set by user.
1505      * - decoding: unused
1506      */
1507     int intra_quant_bias;
1508 #define FF_DEFAULT_QUANT_BIAS 999999
1509
1510     /**
1511      * inter quantizer bias.
1512      * - encoding: set by user.
1513      * - decoding: unused
1514      */
1515     int inter_quant_bias;
1516
1517     /**
1518      * color table ID.
1519      * - encoding: unused.
1520      * - decoding: which clrtable should be used for 8bit RGB images
1521      *             table have to be stored somewhere FIXME
1522      */
1523     int color_table_id;
1524
1525     /**
1526      * internal_buffer count.
1527      * Don't touch, used by lavc default_get_buffer()
1528      */
1529     int internal_buffer_count;
1530
1531     /**
1532      * internal_buffers.
1533      * Don't touch, used by lavc default_get_buffer()
1534      */
1535     void *internal_buffer;
1536
1537 #define FF_LAMBDA_SHIFT 7
1538 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1539 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1540 #define FF_LAMBDA_MAX (256*128-1)
1541
1542 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1543     /**
1544      * global quality for codecs which cannot change it per frame.
1545      * this should be proportional to MPEG1/2/4 qscale.
1546      * - encoding: set by user.
1547      * - decoding: unused
1548      */
1549     int global_quality;
1550
1551 #define FF_CODER_TYPE_VLC   0
1552 #define FF_CODER_TYPE_AC    1
1553     /**
1554      * coder type
1555      * - encoding: set by user.
1556      * - decoding: unused
1557      */
1558     int coder_type;
1559
1560     /**
1561      * context model
1562      * - encoding: set by user.
1563      * - decoding: unused
1564      */
1565     int context_model;
1566 #if 0
1567     /**
1568      *
1569      * - encoding: unused
1570      * - decoding: set by user.
1571      */
1572     uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1573 #endif
1574
1575     /**
1576      * slice flags
1577      * - encoding: unused
1578      * - decoding: set by user.
1579      */
1580     int slice_flags;
1581 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1582 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1583 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1584
1585     /**
1586      * XVideo Motion Acceleration
1587      * - encoding: forbidden
1588      * - decoding: set by decoder
1589      */
1590     int xvmc_acceleration;
1591
1592     /**
1593      * macroblock decision mode
1594      * - encoding: set by user.
1595      * - decoding: unused
1596      */
1597     int mb_decision;
1598 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1599 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1600 #define FF_MB_DECISION_RD     2        ///< rate distoration
1601
1602     /**
1603      * custom intra quantization matrix
1604      * - encoding: set by user, can be NULL
1605      * - decoding: set by lavc
1606      */
1607     uint16_t *intra_matrix;
1608
1609     /**
1610      * custom inter quantization matrix
1611      * - encoding: set by user, can be NULL
1612      * - decoding: set by lavc
1613      */
1614     uint16_t *inter_matrix;
1615
1616     /**
1617      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1618      * this is used to workaround some encoder bugs
1619      * - encoding: unused
1620      * - decoding: set by user, will be converted to upper case by lavc during init
1621      */
1622     unsigned int stream_codec_tag;
1623
1624     /**
1625      * scene change detection threshold.
1626      * 0 is default, larger means fewer detected scene changes
1627      * - encoding: set by user.
1628      * - decoding: unused
1629      */
1630     int scenechange_threshold;
1631
1632     /**
1633      * minimum lagrange multipler
1634      * - encoding: set by user.
1635      * - decoding: unused
1636      */
1637     int lmin;
1638
1639     /**
1640      * maximum lagrange multipler
1641      * - encoding: set by user.
1642      * - decoding: unused
1643      */
1644     int lmax;
1645
1646     /**
1647      * Palette control structure
1648      * - encoding: ??? (no palette-enabled encoder yet)
1649      * - decoding: set by user.
1650      */
1651     struct AVPaletteControl *palctrl;
1652
1653     /**
1654      * noise reduction strength
1655      * - encoding: set by user.
1656      * - decoding: unused
1657      */
1658     int noise_reduction;
1659
1660     /**
1661      * called at the beginning of a frame to get cr buffer for it.
1662      * buffer type (size, hints) must be the same. lavc won't check it.
1663      * lavc will pass previous buffer in pic, function should return
1664      * same buffer or new buffer with old frame "painted" into it.
1665      * if pic.data[0] == NULL must behave like get_buffer().
1666      * - encoding: unused
1667      * - decoding: set by lavc, user can override
1668      */
1669     int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1670
1671     /**
1672      * number of bits which should be loaded into the rc buffer before decoding starts
1673      * - encoding: set by user.
1674      * - decoding: unused
1675      */
1676     int rc_initial_buffer_occupancy;
1677
1678     /**
1679      *
1680      * - encoding: set by user.
1681      * - decoding: unused
1682      */
1683     int inter_threshold;
1684
1685     /**
1686      * CODEC_FLAG2_*.
1687      * - encoding: set by user.
1688      * - decoding: set by user.
1689      */
1690     int flags2;
1691
1692     /**
1693      * simulates errors in the bitstream to test error concealment.
1694      * - encoding: set by user.
1695      * - decoding: unused.
1696      */
1697     int error_rate;
1698
1699     /**
1700      * MP3 antialias algorithm, see FF_AA_* below.
1701      * - encoding: unused
1702      * - decoding: set by user
1703      */
1704     int antialias_algo;
1705 #define FF_AA_AUTO    0
1706 #define FF_AA_FASTINT 1 //not implemented yet
1707 #define FF_AA_INT     2
1708 #define FF_AA_FLOAT   3
1709     /**
1710      * Quantizer noise shaping.
1711      * - encoding: set by user
1712      * - decoding: unused
1713      */
1714     int quantizer_noise_shaping;
1715
1716     /**
1717      * Thread count.
1718      * is used to decide how many independant tasks should be passed to execute()
1719      * - encoding: set by user
1720      * - decoding: set by user
1721      */
1722     int thread_count;
1723
1724     /**
1725      * the codec may call this to execute several independant things. it will return only after
1726      * finishing all tasks, the user may replace this with some multithreaded implementation, the
1727      * default implementation will execute the parts serially
1728      * @param count the number of things to execute
1729      * - encoding: set by lavc, user can override
1730      * - decoding: set by lavc, user can override
1731      */
1732     int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1733
1734     /**
1735      * Thread opaque.
1736      * can be used by execute() to store some per AVCodecContext stuff.
1737      * - encoding: set by execute()
1738      * - decoding: set by execute()
1739      */
1740     void *thread_opaque;
1741
1742     /**
1743      * Motion estimation threshold. under which no motion estimation is
1744      * performed, but instead the user specified motion vectors are used
1745      *
1746      * - encoding: set by user
1747      * - decoding: unused
1748      */
1749      int me_threshold;
1750
1751     /**
1752      * Macroblock threshold. under which the user specified macroblock types will be used
1753      * - encoding: set by user
1754      * - decoding: unused
1755      */
1756      int mb_threshold;
1757
1758     /**
1759      * precision of the intra dc coefficient - 8.
1760      * - encoding: set by user
1761      * - decoding: unused
1762      */
1763      int intra_dc_precision;
1764
1765     /**
1766      * noise vs. sse weight for the nsse comparsion function.
1767      * - encoding: set by user
1768      * - decoding: unused
1769      */
1770      int nsse_weight;
1771
1772     /**
1773      * number of macroblock rows at the top which are skipped.
1774      * - encoding: unused
1775      * - decoding: set by user
1776      */
1777      int skip_top;
1778
1779     /**
1780      * number of macroblock rows at the bottom which are skipped.
1781      * - encoding: unused
1782      * - decoding: set by user
1783      */
1784      int skip_bottom;
1785
1786     /**
1787      * profile
1788      * - encoding: set by user
1789      * - decoding: set by lavc
1790      */
1791      int profile;
1792 #define FF_PROFILE_UNKNOWN -99
1793
1794     /**
1795      * level
1796      * - encoding: set by user
1797      * - decoding: set by lavc
1798      */
1799      int level;
1800 #define FF_LEVEL_UNKNOWN -99
1801
1802     /**
1803      * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1804      * - encoding: unused
1805      * - decoding: set by user
1806      */
1807      int lowres;
1808
1809     /**
1810      * bitsream width / height. may be different from width/height if lowres
1811      * or other things are used
1812      * - encoding: unused
1813      * - decoding: set by user before init if known, codec should override / dynamically change if needed
1814      */
1815     int coded_width, coded_height;
1816
1817     /**
1818      * frame skip threshold
1819      * - encoding: set by user
1820      * - decoding: unused
1821      */
1822     int frame_skip_threshold;
1823
1824     /**
1825      * frame skip factor
1826      * - encoding: set by user
1827      * - decoding: unused
1828      */
1829     int frame_skip_factor;
1830
1831     /**
1832      * frame skip exponent
1833      * - encoding: set by user
1834      * - decoding: unused
1835      */
1836     int frame_skip_exp;
1837
1838     /**
1839      * frame skip comparission function
1840      * - encoding: set by user.
1841      * - decoding: unused
1842      */
1843     int frame_skip_cmp;
1844
1845     /**
1846      * border processing masking. raises the quantizer for mbs on the borders
1847      * of the picture.
1848      * - encoding: set by user
1849      * - decoding: unused
1850      */
1851     float border_masking;
1852
1853     /**
1854      * minimum MB lagrange multipler.
1855      * - encoding: set by user.
1856      * - decoding: unused
1857      */
1858     int mb_lmin;
1859
1860     /**
1861      * maximum MB lagrange multipler.
1862      * - encoding: set by user.
1863      * - decoding: unused
1864      */
1865     int mb_lmax;
1866
1867     /**
1868      *
1869      * - encoding: set by user.
1870      * - decoding: unused
1871      */
1872     int me_penalty_compensation;
1873
1874     /**
1875      *
1876      * - encoding: unused
1877      * - decoding: set by user.
1878      */
1879     enum AVDiscard skip_loop_filter;
1880
1881     /**
1882      *
1883      * - encoding: unused
1884      * - decoding: set by user.
1885      */
1886     enum AVDiscard skip_idct;
1887
1888     /**
1889      *
1890      * - encoding: unused
1891      * - decoding: set by user.
1892      */
1893     enum AVDiscard skip_frame;
1894
1895     /**
1896      *
1897      * - encoding: set by user.
1898      * - decoding: unused
1899      */
1900     int bidir_refine;
1901
1902     /**
1903      *
1904      * - encoding: set by user.
1905      * - decoding: unused
1906      */
1907     int brd_scale;
1908
1909     /**
1910      * constant rate factor - quality-based VBR - values ~correspond to qps
1911      * - encoding: set by user.
1912      * - decoding: unused
1913      */
1914     int crf;
1915
1916     /**
1917      * constant quantization parameter rate control method
1918      * - encoding: set by user.
1919      * - decoding: unused
1920      */
1921     int cqp;
1922
1923     /**
1924      * minimum gop size
1925      * - encoding: set by user.
1926      * - decoding: unused
1927      */
1928     int keyint_min;
1929
1930     /**
1931      * number of reference frames
1932      * - encoding: set by user.
1933      * - decoding: unused
1934      */
1935     int refs;
1936
1937     /**
1938      * chroma qp offset from luma
1939      * - encoding: set by user.
1940      * - decoding: unused
1941      */
1942     int chromaoffset;
1943
1944     /**
1945      * influences how often b-frames are used
1946      * - encoding: set by user.
1947      * - decoding: unused
1948      */
1949     int bframebias;
1950
1951     /**
1952      * trellis RD quantization
1953      * - encoding: set by user.
1954      * - decoding: unused
1955      */
1956     int trellis;
1957
1958     /**
1959      * reduce fluctuations in qp (before curve compression)
1960      * - encoding: set by user.
1961      * - decoding: unused
1962      */
1963     float complexityblur;
1964
1965     /**
1966      * in-loop deblocking filter alphac0 parameter
1967      * alpha is in the range -6...6
1968      * - encoding: set by user.
1969      * - decoding: unused
1970      */
1971     int deblockalpha;
1972
1973     /**
1974      * in-loop deblocking filter beta parameter
1975      * beta is in the range -6...6
1976      * - encoding: set by user.
1977      * - decoding: unused
1978      */
1979     int deblockbeta;
1980
1981     /**
1982      * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1983      * - encoding: set by user.
1984      * - decoding: unused
1985      */
1986     int partitions;
1987 #define X264_PART_I4X4 0x001  /* Analyse i4x4 */
1988 #define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
1989 #define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
1990 #define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
1991 #define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
1992
1993     /**
1994      * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1995      * - encoding: set by user.
1996      * - decoding: unused
1997      */
1998     int directpred;
1999
2000     /**
2001      * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
2002      * - encoding: set by user.
2003      * - decoding: unused
2004      */
2005     int cutoff;
2006
2007     /**
2008      * multiplied by qscale for each frame and added to scene_change_score
2009      * - encoding: set by user.
2010      * - decoding: unused
2011      */
2012     int scenechange_factor;
2013 } AVCodecContext;
2014
2015 /**
2016  * AVCodec.
2017  */
2018 typedef struct AVCodec {
2019     const char *name;
2020     enum CodecType type;
2021     enum CodecID id;
2022     int priv_data_size;
2023     int (*init)(AVCodecContext *);
2024     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2025     int (*close)(AVCodecContext *);
2026     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2027                   uint8_t *buf, int buf_size);
2028     int capabilities;
2029 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2030     void *dummy; // FIXME remove next time we break binary compatibility
2031 #endif
2032     struct AVCodec *next;
2033     void (*flush)(AVCodecContext *);
2034     const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2035     const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2036 } AVCodec;
2037
2038 /**
2039  * four components are given, that's all.
2040  * the last component is alpha
2041  */
2042 typedef struct AVPicture {
2043     uint8_t *data[4];
2044     int linesize[4];       ///< number of bytes per line
2045 } AVPicture;
2046
2047 /**
2048  * AVPaletteControl
2049  * This structure defines a method for communicating palette changes
2050  * between and demuxer and a decoder.
2051  */
2052 #define AVPALETTE_SIZE 1024
2053 #define AVPALETTE_COUNT 256
2054 typedef struct AVPaletteControl {
2055
2056     /* demuxer sets this to 1 to indicate the palette has changed;
2057      * decoder resets to 0 */
2058     int palette_changed;
2059
2060     /* 4-byte ARGB palette entries, stored in native byte order; note that
2061      * the individual palette components should be on a 8-bit scale; if
2062      * the palette data comes from a IBM VGA native format, the component
2063      * data is probably 6 bits in size and needs to be scaled */
2064     unsigned int palette[AVPALETTE_COUNT];
2065
2066 } AVPaletteControl;
2067
2068 typedef struct AVSubtitleRect {
2069     uint16_t x;
2070     uint16_t y;
2071     uint16_t w;
2072     uint16_t h;
2073     uint16_t nb_colors;
2074     int linesize;
2075     uint32_t *rgba_palette;
2076     uint8_t *bitmap;
2077 } AVSubtitleRect;
2078
2079 typedef struct AVSubtitle {
2080     uint16_t format; /* 0 = graphics */
2081     uint32_t start_display_time; /* relative to packet pts, in ms */
2082     uint32_t end_display_time; /* relative to packet pts, in ms */
2083     uint32_t num_rects;
2084     AVSubtitleRect *rects;
2085 } AVSubtitle;
2086
2087 extern AVCodec ac3_encoder;
2088 extern AVCodec mp2_encoder;
2089 extern AVCodec mp3lame_encoder;
2090 extern AVCodec oggvorbis_encoder;
2091 extern AVCodec oggtheora_encoder;
2092 extern AVCodec faac_encoder;
2093 extern AVCodec xvid_encoder;
2094 extern AVCodec mpeg1video_encoder;
2095 extern AVCodec mpeg2video_encoder;
2096 extern AVCodec h261_encoder;
2097 extern AVCodec h263_encoder;
2098 extern AVCodec h263p_encoder;
2099 extern AVCodec flv_encoder;
2100 extern AVCodec rv10_encoder;
2101 extern AVCodec rv20_encoder;
2102 extern AVCodec dvvideo_encoder;
2103 extern AVCodec mjpeg_encoder;
2104 extern AVCodec ljpeg_encoder;
2105 extern AVCodec jpegls_encoder;
2106 extern AVCodec png_encoder;
2107 extern AVCodec ppm_encoder;
2108 extern AVCodec pgm_encoder;
2109 extern AVCodec pgmyuv_encoder;
2110 extern AVCodec pbm_encoder;
2111 extern AVCodec pam_encoder;
2112 extern AVCodec mpeg4_encoder;
2113 extern AVCodec msmpeg4v1_encoder;
2114 extern AVCodec msmpeg4v2_encoder;
2115 extern AVCodec msmpeg4v3_encoder;
2116 extern AVCodec wmv1_encoder;
2117 extern AVCodec wmv2_encoder;
2118 extern AVCodec huffyuv_encoder;
2119 extern AVCodec ffvhuff_encoder;
2120 extern AVCodec h264_encoder;
2121 extern AVCodec asv1_encoder;
2122 extern AVCodec asv2_encoder;
2123 extern AVCodec vcr1_encoder;
2124 extern AVCodec ffv1_encoder;
2125 extern AVCodec snow_encoder;
2126 extern AVCodec mdec_encoder;
2127 extern AVCodec zlib_encoder;
2128 extern AVCodec sonic_encoder;
2129 extern AVCodec sonic_ls_encoder;
2130 extern AVCodec svq1_encoder;
2131 extern AVCodec x264_encoder;
2132
2133 extern AVCodec h263_decoder;
2134 extern AVCodec h261_decoder;
2135 extern AVCodec mpeg4_decoder;
2136 extern AVCodec msmpeg4v1_decoder;
2137 extern AVCodec msmpeg4v2_decoder;
2138 extern AVCodec msmpeg4v3_decoder;
2139 extern AVCodec wmv1_decoder;
2140 extern AVCodec wmv2_decoder;
2141 extern AVCodec vc9_decoder;
2142 extern AVCodec wmv3_decoder;
2143 extern AVCodec mpeg1video_decoder;
2144 extern AVCodec mpeg2video_decoder;
2145 extern AVCodec mpegvideo_decoder;
2146 extern AVCodec mpeg_xvmc_decoder;
2147 extern AVCodec h263i_decoder;
2148 extern AVCodec flv_decoder;
2149 extern AVCodec rv10_decoder;
2150 extern AVCodec rv20_decoder;
2151 extern AVCodec rv30_decoder;
2152 extern AVCodec rv40_decoder;
2153 extern AVCodec svq1_decoder;
2154 extern AVCodec svq3_decoder;
2155 extern AVCodec dvvideo_decoder;
2156 extern AVCodec wmav1_decoder;
2157 extern AVCodec wmav2_decoder;
2158 extern AVCodec mjpeg_decoder;
2159 extern AVCodec mjpegb_decoder;
2160 extern AVCodec sp5x_decoder;
2161 extern AVCodec png_decoder;
2162 extern AVCodec mp2_decoder;
2163 extern AVCodec mp3_decoder;
2164 extern AVCodec mp3adu_decoder;
2165 extern AVCodec mp3on4_decoder;
2166 extern AVCodec qdm2_decoder;
2167 extern AVCodec cook_decoder;
2168 extern AVCodec truespeech_decoder;
2169 extern AVCodec tta_decoder;
2170 extern AVCodec mace3_decoder;
2171 extern AVCodec mace6_decoder;
2172 extern AVCodec huffyuv_decoder;
2173 extern AVCodec ffvhuff_decoder;
2174 extern AVCodec oggvorbis_decoder;
2175 extern AVCodec oggtheora_decoder;
2176 extern AVCodec cyuv_decoder;
2177 extern AVCodec h264_decoder;
2178 extern AVCodec indeo3_decoder;
2179 extern AVCodec vp3_decoder;
2180 extern AVCodec theora_decoder;
2181 extern AVCodec amr_nb_decoder;
2182 extern AVCodec amr_nb_encoder;
2183 extern AVCodec amr_wb_encoder;
2184 extern AVCodec amr_wb_decoder;
2185 extern AVCodec aac_decoder;
2186 extern AVCodec mpeg4aac_decoder;
2187 extern AVCodec asv1_decoder;
2188 extern AVCodec asv2_decoder;
2189 extern AVCodec vcr1_decoder;
2190 extern AVCodec cljr_decoder;
2191 extern AVCodec ffv1_decoder;
2192 extern AVCodec snow_decoder;
2193 extern AVCodec fourxm_decoder;
2194 extern AVCodec mdec_decoder;
2195 extern AVCodec roq_decoder;
2196 extern AVCodec interplay_video_decoder;
2197 extern AVCodec xan_wc3_decoder;
2198 extern AVCodec rpza_decoder;
2199 extern AVCodec cinepak_decoder;
2200 extern AVCodec msrle_decoder;
2201 extern AVCodec msvideo1_decoder;
2202 extern AVCodec vqa_decoder;
2203 extern AVCodec idcin_decoder;
2204 extern AVCodec eightbps_decoder;
2205 extern AVCodec smc_decoder;
2206 extern AVCodec flic_decoder;
2207 extern AVCodec vmdvideo_decoder;
2208 extern AVCodec vmdaudio_decoder;
2209 extern AVCodec truemotion1_decoder;
2210 extern AVCodec truemotion2_decoder;
2211 extern AVCodec mszh_decoder;
2212 extern AVCodec zlib_decoder;
2213 extern AVCodec ra_144_decoder;
2214 extern AVCodec ra_288_decoder;
2215 extern AVCodec roq_dpcm_decoder;
2216 extern AVCodec interplay_dpcm_decoder;
2217 extern AVCodec xan_dpcm_decoder;
2218 extern AVCodec sol_dpcm_decoder;
2219 extern AVCodec sonic_decoder;
2220 extern AVCodec qtrle_decoder;
2221 extern AVCodec flac_decoder;
2222 extern AVCodec tscc_decoder;
2223 extern AVCodec cscd_decoder;
2224 extern AVCodec ulti_decoder;
2225 extern AVCodec qdraw_decoder;
2226 extern AVCodec xl_decoder;
2227 extern AVCodec qpeg_decoder;
2228 extern AVCodec shorten_decoder;
2229 extern AVCodec loco_decoder;
2230 extern AVCodec wnv1_decoder;
2231 extern AVCodec aasc_decoder;
2232 extern AVCodec alac_decoder;
2233 extern AVCodec ws_snd1_decoder;
2234 extern AVCodec indeo2_decoder;
2235 extern AVCodec vorbis_decoder;
2236 extern AVCodec fraps_decoder;
2237 extern AVCodec libgsm_encoder;
2238 extern AVCodec libgsm_decoder;
2239 extern AVCodec bmp_decoder;
2240 extern AVCodec mmvideo_decoder;
2241 extern AVCodec zmbv_decoder;
2242 extern AVCodec avs_decoder;
2243 extern AVCodec smacker_decoder;
2244 extern AVCodec smackaud_decoder;
2245
2246 /* pcm codecs */
2247 #define PCM_CODEC(id, name) \
2248 extern AVCodec name ## _decoder; \
2249 extern AVCodec name ## _encoder
2250
2251 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2252 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2253 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2254 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2255 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2256 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2257 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2258 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2259 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2260 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2261 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2262 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2263 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2264 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2265 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2266 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2267 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2268
2269 /* adpcm codecs */
2270
2271 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2272 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2273 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2274 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2275 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2276 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2277 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2278 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2279 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2280 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2281 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2282 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2283 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2284 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2285 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2286 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2287 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2288 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2289
2290 #undef PCM_CODEC
2291
2292 /* dummy raw video codec */
2293 extern AVCodec rawvideo_encoder;
2294 extern AVCodec rawvideo_decoder;
2295
2296 /* the following codecs use external GPL libs */
2297 extern AVCodec ac3_decoder;
2298 extern AVCodec dts_decoder;
2299
2300 /* subtitles */
2301 extern AVCodec dvdsub_encoder;
2302 extern AVCodec dvdsub_decoder;
2303 extern AVCodec dvbsub_encoder;
2304 extern AVCodec dvbsub_decoder;
2305
2306 /* resample.c */
2307
2308 struct ReSampleContext;
2309 struct AVResampleContext;
2310
2311 typedef struct ReSampleContext ReSampleContext;
2312
2313 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2314                                      int output_rate, int input_rate);
2315 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2316 void audio_resample_close(ReSampleContext *s);
2317
2318 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2319 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2320 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2321 void av_resample_close(struct AVResampleContext *c);
2322
2323 /* YUV420 format is assumed ! */
2324
2325 struct ImgReSampleContext;
2326
2327 typedef struct ImgReSampleContext ImgReSampleContext;
2328
2329 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2330                                       int input_width, int input_height);
2331
2332 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2333                                       int iwidth, int iheight,
2334                                       int topBand, int bottomBand,
2335                                       int leftBand, int rightBand,
2336                                       int padtop, int padbottom,
2337                                       int padleft, int padright);
2338
2339
2340 void img_resample(ImgReSampleContext *s,
2341                   AVPicture *output, const AVPicture *input);
2342
2343 void img_resample_close(ImgReSampleContext *s);
2344
2345 /**
2346  * Allocate memory for a picture.  Call avpicture_free to free it.
2347  *
2348  * @param picture the picture to be filled in.
2349  * @param pix_fmt the format of the picture.
2350  * @param width the width of the picture.
2351  * @param height the height of the picture.
2352  * @return 0 if successful, -1 if not.
2353  */
2354 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2355
2356 /* Free a picture previously allocated by avpicture_alloc. */
2357 void avpicture_free(AVPicture *picture);
2358
2359 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2360                    int pix_fmt, int width, int height);
2361 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2362                      unsigned char *dest, int dest_size);
2363 int avpicture_get_size(int pix_fmt, int width, int height);
2364 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2365 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2366 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2367 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2368 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2369
2370 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
2371 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
2372 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
2373 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
2374 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
2375 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2376
2377 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2378                              int has_alpha);
2379 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2380                               int has_alpha, int *loss_ptr);
2381
2382 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2383 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2384 int img_get_alpha_info(const AVPicture *src,
2385                        int pix_fmt, int width, int height);
2386
2387 /* convert among pixel formats */
2388 int img_convert(AVPicture *dst, int dst_pix_fmt,
2389                 const AVPicture *src, int pix_fmt,
2390                 int width, int height);
2391
2392 /* deinterlace a picture */
2393 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2394                           int pix_fmt, int width, int height);
2395
2396 /* external high level API */
2397
2398 extern AVCodec *first_avcodec;
2399
2400 /* returns LIBAVCODEC_VERSION_INT constant */
2401 unsigned avcodec_version(void);
2402 /* returns LIBAVCODEC_BUILD constant */
2403 unsigned avcodec_build(void);
2404 void avcodec_init(void);
2405
2406 void register_avcodec(AVCodec *format);
2407 AVCodec *avcodec_find_encoder(enum CodecID id);
2408 AVCodec *avcodec_find_encoder_by_name(const char *name);
2409 AVCodec *avcodec_find_decoder(enum CodecID id);
2410 AVCodec *avcodec_find_decoder_by_name(const char *name);
2411 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2412
2413 void avcodec_get_context_defaults(AVCodecContext *s);
2414 AVCodecContext *avcodec_alloc_context(void);
2415 void avcodec_get_frame_defaults(AVFrame *pic);
2416 AVFrame *avcodec_alloc_frame(void);
2417
2418 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2419 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2420 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2421 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2422 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2423 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2424
2425 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2426 void avcodec_thread_free(AVCodecContext *s);
2427 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2428 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2429 //FIXME func typedef
2430
2431 /**
2432  * opens / inits the AVCodecContext.
2433  * not thread save!
2434  */
2435 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2436
2437 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2438                          int *frame_size_ptr,
2439                          uint8_t *buf, int buf_size);
2440 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2441                          int *got_picture_ptr,
2442                          uint8_t *buf, int buf_size);
2443 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2444                             int *got_sub_ptr,
2445                             const uint8_t *buf, int buf_size);
2446 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2447                         int *data_size_ptr,
2448                         uint8_t *buf, int buf_size);
2449 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2450                          const short *samples);
2451 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2452                          const AVFrame *pict);
2453 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2454                             const AVSubtitle *sub);
2455
2456 int avcodec_close(AVCodecContext *avctx);
2457
2458 void avcodec_register_all(void);
2459
2460 void avcodec_flush_buffers(AVCodecContext *avctx);
2461
2462 void avcodec_default_free_buffers(AVCodecContext *s);
2463
2464 /* misc usefull functions */
2465
2466 /**
2467  * returns a single letter to describe the picture type
2468  */
2469 char av_get_pict_type_char(int pict_type);
2470
2471
2472 /* frame parsing */
2473 typedef struct AVCodecParserContext {
2474     void *priv_data;
2475     struct AVCodecParser *parser;
2476     int64_t frame_offset; /* offset of the current frame */
2477     int64_t cur_offset; /* current offset
2478                            (incremented by each av_parser_parse()) */
2479     int64_t last_frame_offset; /* offset of the last frame */
2480     /* video info */
2481     int pict_type; /* XXX: put it back in AVCodecContext */
2482     int repeat_pict; /* XXX: put it back in AVCodecContext */
2483     int64_t pts;     /* pts of the current frame */
2484     int64_t dts;     /* dts of the current frame */
2485
2486     /* private data */
2487     int64_t last_pts;
2488     int64_t last_dts;
2489     int fetch_timestamp;
2490
2491 #define AV_PARSER_PTS_NB 4
2492     int cur_frame_start_index;
2493     int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2494     int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2495     int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2496
2497     int flags;
2498 #define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2499 } AVCodecParserContext;
2500
2501 typedef struct AVCodecParser {
2502     int codec_ids[5]; /* several codec IDs are permitted */
2503     int priv_data_size;
2504     int (*parser_init)(AVCodecParserContext *s);
2505     int (*parser_parse)(AVCodecParserContext *s,
2506                         AVCodecContext *avctx,
2507                         uint8_t **poutbuf, int *poutbuf_size,
2508                         const uint8_t *buf, int buf_size);
2509     void (*parser_close)(AVCodecParserContext *s);
2510     int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2511     struct AVCodecParser *next;
2512 } AVCodecParser;
2513
2514 extern AVCodecParser *av_first_parser;
2515
2516 void av_register_codec_parser(AVCodecParser *parser);
2517 AVCodecParserContext *av_parser_init(int codec_id);
2518 int av_parser_parse(AVCodecParserContext *s,
2519                     AVCodecContext *avctx,
2520                     uint8_t **poutbuf, int *poutbuf_size,
2521                     const uint8_t *buf, int buf_size,
2522                     int64_t pts, int64_t dts);
2523 int av_parser_change(AVCodecParserContext *s,
2524                      AVCodecContext *avctx,
2525                      uint8_t **poutbuf, int *poutbuf_size,
2526                      const uint8_t *buf, int buf_size, int keyframe);
2527 void av_parser_close(AVCodecParserContext *s);
2528
2529 extern AVCodecParser mpegvideo_parser;
2530 extern AVCodecParser mpeg4video_parser;
2531 extern AVCodecParser h261_parser;
2532 extern AVCodecParser h263_parser;
2533 extern AVCodecParser h264_parser;
2534 extern AVCodecParser mjpeg_parser;
2535 extern AVCodecParser pnm_parser;
2536 extern AVCodecParser mpegaudio_parser;
2537 extern AVCodecParser ac3_parser;
2538 extern AVCodecParser dvdsub_parser;
2539 extern AVCodecParser dvbsub_parser;
2540 extern AVCodecParser aac_parser;
2541
2542 /* memory */
2543 void *av_malloc(unsigned int size);
2544 void *av_mallocz(unsigned int size);
2545 void *av_realloc(void *ptr, unsigned int size);
2546 void av_free(void *ptr);
2547 char *av_strdup(const char *s);
2548 void av_freep(void *ptr);
2549 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2550 /* for static data only */
2551 /* call av_free_static to release all staticaly allocated tables */
2552 void av_free_static(void);
2553 void *av_mallocz_static(unsigned int size);
2554 void *av_realloc_static(void *ptr, unsigned int size);
2555
2556 /* add by bero : in adx.c */
2557 int is_adx(const unsigned char *buf,size_t bufsize);
2558
2559 void img_copy(AVPicture *dst, const AVPicture *src,
2560               int pix_fmt, int width, int height);
2561
2562 int img_crop(AVPicture *dst, const AVPicture *src,
2563              int pix_fmt, int top_band, int left_band);
2564
2565 /* av_log API */
2566
2567 #include <stdarg.h>
2568
2569 #define AV_LOG_QUIET -1
2570 #define AV_LOG_ERROR 0
2571 #define AV_LOG_INFO 1
2572 #define AV_LOG_DEBUG 2
2573
2574 #ifdef __GNUC__
2575 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2576 #else
2577 extern void av_log(void*, int level, const char *fmt, ...);
2578 #endif
2579
2580 extern void av_vlog(void*, int level, const char *fmt, va_list);
2581 extern int av_log_get_level(void);
2582 extern void av_log_set_level(int);
2583 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2584
2585 /* endian macros */
2586 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2587 #define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2588 #define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
2589                    (((uint8_t*)(x))[1] << 16) | \
2590                    (((uint8_t*)(x))[2] << 8) | \
2591                     ((uint8_t*)(x))[3])
2592 #define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2593 #define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
2594                    (((uint8_t*)(x))[2] << 16) | \
2595                    (((uint8_t*)(x))[1] << 8) | \
2596                     ((uint8_t*)(x))[0])
2597 #endif
2598
2599 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2600
2601 #ifdef __cplusplus
2602 }
2603 #endif
2604
2605 #endif /* AVCODEC_H */