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)+(9<<8)+0)
  25 #define LIBAVCODEC_VERSION      51.9.0
  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     CODEC_ID_NUV,
 123     CODEC_ID_KMVC,
 124
 125     /* various pcm "codecs" */
 126     CODEC_ID_PCM_S16LE= 0x10000,
 127     CODEC_ID_PCM_S16BE,
 128     CODEC_ID_PCM_U16LE,
 129     CODEC_ID_PCM_U16BE,
 130     CODEC_ID_PCM_S8,
 131     CODEC_ID_PCM_U8,
 132     CODEC_ID_PCM_MULAW,
 133     CODEC_ID_PCM_ALAW,
 134     CODEC_ID_PCM_S32LE,
 135     CODEC_ID_PCM_S32BE,
 136     CODEC_ID_PCM_U32LE,
 137     CODEC_ID_PCM_U32BE,
 138     CODEC_ID_PCM_S24LE,
 139     CODEC_ID_PCM_S24BE,
 140     CODEC_ID_PCM_U24LE,
 141     CODEC_ID_PCM_U24BE,
 142     CODEC_ID_PCM_S24DAUD,
 143
 144     /* various adpcm codecs */
 145     CODEC_ID_ADPCM_IMA_QT= 0x11000,
 146     CODEC_ID_ADPCM_IMA_WAV,
 147     CODEC_ID_ADPCM_IMA_DK3,
 148     CODEC_ID_ADPCM_IMA_DK4,
 149     CODEC_ID_ADPCM_IMA_WS,
 150     CODEC_ID_ADPCM_IMA_SMJPEG,
 151     CODEC_ID_ADPCM_MS,
 152     CODEC_ID_ADPCM_4XM,
 153     CODEC_ID_ADPCM_XA,
 154     CODEC_ID_ADPCM_ADX,
 155     CODEC_ID_ADPCM_EA,
 156     CODEC_ID_ADPCM_G726,
 157     CODEC_ID_ADPCM_CT,
 158     CODEC_ID_ADPCM_SWF,
 159     CODEC_ID_ADPCM_YAMAHA,
 160     CODEC_ID_ADPCM_SBPRO_4,
 161     CODEC_ID_ADPCM_SBPRO_3,
 162     CODEC_ID_ADPCM_SBPRO_2,
 163
 164     /* AMR */
 165     CODEC_ID_AMR_NB= 0x12000,
 166     CODEC_ID_AMR_WB,
 167
 168     /* RealAudio codecs*/
 169     CODEC_ID_RA_144= 0x13000,
 170     CODEC_ID_RA_288,
 171
 172     /* various DPCM codecs */
 173     CODEC_ID_ROQ_DPCM= 0x14000,
 174     CODEC_ID_INTERPLAY_DPCM,
 175     CODEC_ID_XAN_DPCM,
 176     CODEC_ID_SOL_DPCM,
 177
 178     CODEC_ID_MP2= 0x15000,
 179     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
 180     CODEC_ID_AAC,
 181     CODEC_ID_MPEG4AAC,
 182     CODEC_ID_AC3,
 183     CODEC_ID_DTS,
 184     CODEC_ID_VORBIS,
 185     CODEC_ID_DVAUDIO,
 186     CODEC_ID_WMAV1,
 187     CODEC_ID_WMAV2,
 188     CODEC_ID_MACE3,
 189     CODEC_ID_MACE6,
 190     CODEC_ID_VMDAUDIO,
 191     CODEC_ID_SONIC,
 192     CODEC_ID_SONIC_LS,
 193     CODEC_ID_FLAC,
 194     CODEC_ID_MP3ADU,
 195     CODEC_ID_MP3ON4,
 196     CODEC_ID_SHORTEN,
 197     CODEC_ID_ALAC,
 198     CODEC_ID_WESTWOOD_SND1,
 199     CODEC_ID_GSM,
 200     CODEC_ID_QDM2,
 201     CODEC_ID_COOK,
 202     CODEC_ID_TRUESPEECH,
 203     CODEC_ID_TTA,
 204     CODEC_ID_SMACKAUDIO,
 205
 206     CODEC_ID_OGGTHEORA= 0x16000,
 207
 208     /* subtitle codecs */
 209     CODEC_ID_DVD_SUBTITLE= 0x17000,
 210     CODEC_ID_DVB_SUBTITLE,
 211
 212     CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
 213                          stream (only used by libavformat) */
 214 };
 215
 216 /* CODEC_ID_MP3LAME is absolete */
 217 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 218
 219 enum CodecType {
 220     CODEC_TYPE_UNKNOWN = -1,
 221     CODEC_TYPE_VIDEO,
 222     CODEC_TYPE_AUDIO,
 223     CODEC_TYPE_DATA,
 224     CODEC_TYPE_SUBTITLE,
 225 };
 226
 227 /* currently unused, may be used if 24/32 bits samples ever supported */
 228 /* all in native endian */
 229 enum SampleFormat {
 230     SAMPLE_FMT_NONE = -1,
 231     SAMPLE_FMT_U8,              ///< unsigned 8 bits
 232     SAMPLE_FMT_S16,             ///< signed 16 bits
 233     SAMPLE_FMT_S24,             ///< signed 24 bits
 234     SAMPLE_FMT_S32,             ///< signed 32 bits
 235     SAMPLE_FMT_FLT,             ///< float
 236 };
 237
 238 /* in bytes */
 239 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
 240
 241 /**
 242  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 243  * this is mainly needed because some optimized bitstream readers read
 244  * 32 or 64 bit at once and could read over the end<br>
 245  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 246  * MPEG bitstreams could cause overread and segfault
 247  */
 248 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 249
 250 /**
 251  * minimum encoding buffer size.
 252  * used to avoid some checks during header writing
 253  */
 254 #define FF_MIN_BUFFER_SIZE 16384
 255
 256 /* motion estimation type, EPZS by default */
 257 enum Motion_Est_ID {
 258     ME_ZERO = 1,
 259     ME_FULL,
 260     ME_LOG,
 261     ME_PHODS,
 262     ME_EPZS,
 263     ME_X1,
 264     ME_HEX,
 265     ME_UMH,
 266     ME_ITER,
 267 };
 268
 269 enum AVDiscard{
 270 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
 271     AVDISCARD_NONE   =-16, ///< discard nothing
 272     AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
 273     AVDISCARD_NONREF =  8, ///< discard all non reference
 274     AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
 275     AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
 276     AVDISCARD_ALL    = 48, ///< discard all
 277 };
 278
 279 typedef struct RcOverride{
 280     int start_frame;
 281     int end_frame;
 282     int qscale; // if this is 0 then quality_factor will be used instead
 283     float quality_factor;
 284 } RcOverride;
 285
 286 /* only for ME compatiblity with old apps */
 287 extern int motion_estimation_method;
 288
 289 #define FF_MAX_B_FRAMES 16
 290
 291 /* encoding support
 292    these flags can be passed in AVCodecContext.flags before initing
 293    Note: not everything is supported yet.
 294 */
 295
 296 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 297 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
 298 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 299 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 300 #define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0>
 301 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 302 /* parent program gurantees that the input for b-frame containing streams is not written to
 303    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 304 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 305 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 306 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 307 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 308 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 309 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
 310 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 311 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 312                                             of only at frame boundaries */
 313 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 314 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 315 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 316 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 317 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 318 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 319 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 320 /* Fx : Flag for h263+ extra options */
 321 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
 322 #define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
 323 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 324 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 325 #define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
 326 #define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
 327 #define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
 328 #define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
 329 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 330 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
 331 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
 332 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 333 #define CODEC_FLAG2_FAST          0x00000001 ///< allow non spec compliant speedup tricks
 334 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< strictly enforce GOP size
 335 #define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< skip bitstream encoding
 336 #define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< place global headers at every keyframe instead of in extradata
 337 #define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow b-frames to be used as references
 338 #define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for b-frames
 339 #define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 multiple references per partition
 340 #define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
 341 #define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
 342 #define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
 343 #define CODEC_FLAG2_BRDO          0x00000400 ///< b-frame rate-distortion optimization
 344
 345 /* Unsupported options :
 346  *              Syntax Arithmetic coding (SAC)
 347  *              Reference Picture Selection
 348  *              Independant Segment Decoding */
 349 /* /Fx */
 350 /* codec capabilities */
 351
 352 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 353 /**
 354  * Codec uses get_buffer() for allocating buffers.
 355  * direct rendering method 1
 356  */
 357 #define CODEC_CAP_DR1             0x0002
 358 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 359    used */
 360 #define CODEC_CAP_PARSE_ONLY      0x0004
 361 #define CODEC_CAP_TRUNCATED       0x0008
 362 /* codec can export data for HW decoding (XvMC) */
 363 #define CODEC_CAP_HWACCEL         0x0010
 364 /**
 365  * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
 366  * if this is not set, the codec is guranteed to never be feeded with NULL data
 367  */
 368 #define CODEC_CAP_DELAY           0x0020
 369
 370 //the following defines may change, don't expect compatibility if you use them
 371 #define MB_TYPE_INTRA4x4   0x0001
 372 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
 373 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
 374 #define MB_TYPE_16x16      0x0008
 375 #define MB_TYPE_16x8       0x0010
 376 #define MB_TYPE_8x16       0x0020
 377 #define MB_TYPE_8x8        0x0040
 378 #define MB_TYPE_INTERLACED 0x0080
 379 #define MB_TYPE_DIRECT2     0x0100 //FIXME
 380 #define MB_TYPE_ACPRED     0x0200
 381 #define MB_TYPE_GMC        0x0400
 382 #define MB_TYPE_SKIP       0x0800
 383 #define MB_TYPE_P0L0       0x1000
 384 #define MB_TYPE_P1L0       0x2000
 385 #define MB_TYPE_P0L1       0x4000
 386 #define MB_TYPE_P1L1       0x8000
 387 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 388 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 389 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 390 #define MB_TYPE_QUANT      0x00010000
 391 #define MB_TYPE_CBP        0x00020000
 392 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
 393
 394 /**
 395  * Pan Scan area.
 396  * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
 397  */
 398 typedef struct AVPanScan{
 399     /**
 400      * id.
 401      * - encoding: set by user.
 402      * - decoding: set by lavc
 403      */
 404     int id;
 405
 406     /**
 407      * width and height in 1/16 pel
 408      * - encoding: set by user.
 409      * - decoding: set by lavc
 410      */
 411     int width;
 412     int height;
 413
 414     /**
 415      * position of the top left corner in 1/16 pel for up to 3 fields/frames.
 416      * - encoding: set by user.
 417      * - decoding: set by lavc
 418      */
 419     int16_t position[3][2];
 420 }AVPanScan;
 421
 422 #define FF_COMMON_FRAME \
 423     /**\
 424      * pointer to the picture planes.\
 425      * this might be different from the first allocated byte\
 426      * - encoding: \
 427      * - decoding: \
 428      */\
 429     uint8_t *data[4];\
 430     int linesize[4];\
 431     /**\
 432      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 433      * this isn't used by lavc unless the default get/release_buffer() is used\
 434      * - encoding: \
 435      * - decoding: \
 436      */\
 437     uint8_t *base[4];\
 438     /**\
 439      * 1 -> keyframe, 0-> not\
 440      * - encoding: set by lavc\
 441      * - decoding: set by lavc\
 442      */\
 443     int key_frame;\
 444 \
 445     /**\
 446      * picture type of the frame, see ?_TYPE below.\
 447      * - encoding: set by lavc for coded_picture (and set by user for input)\
 448      * - decoding: set by lavc\
 449      */\
 450     int pict_type;\
 451 \
 452     /**\
 453      * presentation timestamp in time_base units (time when frame should be shown to user)\
 454      * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
 455      * - encoding: MUST be set by user\
 456      * - decoding: set by lavc\
 457      */\
 458     int64_t pts;\
 459 \
 460     /**\
 461      * picture number in bitstream order.\
 462      * - encoding: set by\
 463      * - decoding: set by lavc\
 464      */\
 465     int coded_picture_number;\
 466     /**\
 467      * picture number in display order.\
 468      * - encoding: set by\
 469      * - decoding: set by lavc\
 470      */\
 471     int display_picture_number;\
 472 \
 473     /**\
 474      * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
 475      * - encoding: set by lavc for coded_picture (and set by user for input)\
 476      * - decoding: set by lavc\
 477      */\
 478     int quality; \
 479 \
 480     /**\
 481      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 482      * set to INT_MAX if the buffer has not been used yet \
 483      * - encoding: unused\
 484      * - decoding: MUST be set by get_buffer()\
 485      */\
 486     int age;\
 487 \
 488     /**\
 489      * is this picture used as reference\
 490      * - encoding: unused\
 491      * - decoding: set by lavc (before get_buffer() call))\
 492      */\
 493     int reference;\
 494 \
 495     /**\
 496      * QP table\
 497      * - encoding: unused\
 498      * - decoding: set by lavc\
 499      */\
 500     int8_t *qscale_table;\
 501     /**\
 502      * QP store stride\
 503      * - encoding: unused\
 504      * - decoding: set by lavc\
 505      */\
 506     int qstride;\
 507 \
 508     /**\
 509      * mbskip_table[mb]>=1 if MB didnt change\
 510      * stride= mb_width = (width+15)>>4\
 511      * - encoding: unused\
 512      * - decoding: set by lavc\
 513      */\
 514     uint8_t *mbskip_table;\
 515 \
 516     /**\
 517      * Motion vector table.\
 518      * @code\
 519      * example:\
 520      * int mv_sample_log2= 4 - motion_subsample_log2;\
 521      * int mb_width= (width+15)>>4;\
 522      * int mv_stride= (mb_width << mv_sample_log2) + 1;\
 523      * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
 524      * @endcode\
 525      * - encoding: set by user\
 526      * - decoding: set by lavc\
 527      */\
 528     int16_t (*motion_val[2])[2];\
 529 \
 530     /**\
 531      * Macroblock type table\
 532      * mb_type_base + mb_width + 2\
 533      * - encoding: set by user\
 534      * - decoding: set by lavc\
 535      */\
 536     uint32_t *mb_type;\
 537 \
 538     /**\
 539      * log2 of the size of the block which a single vector in motion_val represents: \
 540      * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
 541      * - encoding: unused\
 542      * - decoding: set by lavc\
 543      */\
 544     uint8_t motion_subsample_log2;\
 545 \
 546     /**\
 547      * for some private data of the user\
 548      * - encoding: unused\
 549      * - decoding: set by user\
 550      */\
 551     void *opaque;\
 552 \
 553     /**\
 554      * error\
 555      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 556      * - decoding: unused\
 557      */\
 558     uint64_t error[4];\
 559 \
 560     /**\
 561      * type of the buffer (to keep track of who has to dealloc data[*])\
 562      * - encoding: set by the one who allocs it\
 563      * - decoding: set by the one who allocs it\
 564      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 565      */\
 566     int type;\
 567     \
 568     /**\
 569      * when decoding, this signal how much the picture must be delayed.\
 570      * extra_delay = repeat_pict / (2*fps)\
 571      * - encoding: unused\
 572      * - decoding: set by lavc\
 573      */\
 574     int repeat_pict;\
 575     \
 576     /**\
 577      * \
 578      */\
 579     int qscale_type;\
 580     \
 581     /**\
 582      * The content of the picture is interlaced.\
 583      * - encoding: set by user\
 584      * - decoding: set by lavc (default 0)\
 585      */\
 586     int interlaced_frame;\
 587     \
 588     /**\
 589      * if the content is interlaced, is top field displayed first.\
 590      * - encoding: set by user\
 591      * - decoding: set by lavc\
 592      */\
 593     int top_field_first;\
 594     \
 595     /**\
 596      * Pan scan.\
 597      * - encoding: set by user\
 598      * - decoding: set by lavc\
 599      */\
 600     AVPanScan *pan_scan;\
 601     \
 602     /**\
 603      * tell user application that palette has changed from previous frame.\
 604      * - encoding: ??? (no palette-enabled encoder yet)\
 605      * - decoding: set by lavc (default 0)\
 606      */\
 607     int palette_has_changed;\
 608     \
 609     /**\
 610      * Codec suggestion on buffer type if != 0\
 611      * - encoding: unused\
 612      * - decoding: set by lavc (before get_buffer() call))\
 613      */\
 614     int buffer_hints;\
 615 \
 616     /**\
 617      * DCT coeffitients\
 618      * - encoding: unused\
 619      * - decoding: set by lavc\
 620      */\
 621     short *dct_coeff;\
 622 \
 623     /**\
 624      * Motion referece frame index\
 625      * - encoding: set by user\
 626      * - decoding: set by lavc\
 627      */\
 628     int8_t *ref_index[2];
 629
 630 #define FF_QSCALE_TYPE_MPEG1 0
 631 #define FF_QSCALE_TYPE_MPEG2 1
 632 #define FF_QSCALE_TYPE_H264  2
 633
 634 #define FF_BUFFER_TYPE_INTERNAL 1
 635 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 636 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
 637 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
 638
 639
 640 #define FF_I_TYPE 1 // Intra
 641 #define FF_P_TYPE 2 // Predicted
 642 #define FF_B_TYPE 3 // Bi-dir predicted
 643 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 644 #define FF_SI_TYPE 5
 645 #define FF_SP_TYPE 6
 646
 647 #define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
 648 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
 649 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
 650 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
 651
 652 /**
 653  * Audio Video Frame.
 654  */
 655 typedef struct AVFrame {
 656     FF_COMMON_FRAME
 657 } AVFrame;
 658
 659 #define DEFAULT_FRAME_RATE_BASE 1001000
 660
 661 /**
 662  * Used by av_log
 663  */
 664 typedef struct AVCLASS AVClass;
 665 struct AVCLASS {
 666     const char* class_name;
 667     const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
 668                                         or AVFormatContext, which begin with an AVClass.
 669                                         Needed because av_log is in libavcodec and has no visibility
 670                                         of AVIn/OutputFormat */
 671     struct AVOption *option;
 672 };
 673
 674 /**
 675  * main external api structure.
 676  */
 677 typedef struct AVCodecContext {
 678     /**
 679      * Info on struct for av_log
 680      * - set by avcodec_alloc_context
 681      */
 682     AVClass *av_class;
 683     /**
 684      * the average bitrate.
 685      * - encoding: set by user. unused for constant quantizer encoding
 686      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 687      */
 688     int bit_rate;
 689
 690     /**
 691      * number of bits the bitstream is allowed to diverge from the reference.
 692      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 693      * - encoding: set by user. unused for constant quantizer encoding
 694      * - decoding: unused
 695      */
 696     int bit_rate_tolerance;
 697
 698     /**
 699      * CODEC_FLAG_*.
 700      * - encoding: set by user.
 701      * - decoding: set by user.
 702      */
 703     int flags;
 704
 705     /**
 706      * some codecs needs additionnal format info. It is stored here
 707      * - encoding: set by user.
 708      * - decoding: set by lavc. (FIXME is this ok?)
 709      */
 710     int sub_id;
 711
 712     /**
 713      * motion estimation algorithm used for video coding.
 714      * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
 715      * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
 716      * - encoding: MUST be set by user.
 717      * - decoding: unused
 718      */
 719     int me_method;
 720
 721     /**
 722      * some codecs need / can use extra-data like huffman tables.
 723      * mjpeg: huffman tables
 724      * rv10: additional flags
 725      * mpeg4: global headers (they can be in the bitstream or here)
 726      * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
 727      * then extradata_size to avoid prolems if its read with the bitstream reader
 728      * the bytewise contents of extradata must not depend on the architecture or cpu endianness
 729      * - encoding: set/allocated/freed by lavc.
 730      * - decoding: set/allocated/freed by user.
 731      */
 732     void *extradata;
 733     int extradata_size;
 734
 735     /**
 736      * this is the fundamental unit of time (in seconds) in terms
 737      * of which frame timestamps are represented. for fixed-fps content,
 738      * timebase should be 1/framerate and timestamp increments should be
 739      * identically 1.
 740      * - encoding: MUST be set by user
 741      * - decoding: set by lavc.
 742      */
 743     AVRational time_base;
 744
 745     /* video only */
 746     /**
 747      * picture width / height.
 748      * - encoding: MUST be set by user.
 749      * - decoding: set by lavc.
 750      * Note, for compatibility its possible to set this instead of
 751      * coded_width/height before decoding
 752      */
 753     int width, height;
 754
 755 #define FF_ASPECT_EXTENDED 15
 756
 757     /**
 758      * the number of pictures in a group of pitures, or 0 for intra_only.
 759      * - encoding: set by user.
 760      * - decoding: unused
 761      */
 762     int gop_size;
 763
 764     /**
 765      * pixel format, see PIX_FMT_xxx.
 766      * - encoding: set by user.
 767      * - decoding: set by lavc.
 768      */
 769     enum PixelFormat pix_fmt;
 770
 771     /**
 772      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 773      * has to read frames at native frame rate.
 774      * - encoding: set by user.
 775      * - decoding: unused.
 776      */
 777     int rate_emu;
 778
 779     /**
 780      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 781      * decoder to draw an horizontal band. It improve cache usage. Not
 782      * all codecs can do that. You must check the codec capabilities
 783      * before
 784      * - encoding: unused
 785      * - decoding: set by user.
 786      * @param height the height of the slice
 787      * @param y the y position of the slice
 788      * @param type 1->top field, 2->bottom field, 3->frame
 789      * @param offset offset into the AVFrame.data from which the slice should be read
 790      */
 791     void (*draw_horiz_band)(struct AVCodecContext *s,
 792                             const AVFrame *src, int offset[4],
 793                             int y, int type, int height);
 794
 795     /* audio only */
 796     int sample_rate; ///< samples per sec
 797     int channels;
 798
 799     /**
 800      * audio sample format.
 801      * - encoding: set by user.
 802      * - decoding: set by lavc.
 803      */
 804     enum SampleFormat sample_fmt;  ///< sample format, currenly unused
 805
 806     /* the following data should not be initialized */
 807     /**
 808      * samples per packet. initialized when calling 'init'
 809      */
 810     int frame_size;
 811     int frame_number;   ///< audio or video frame number
 812     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 813
 814     /**
 815      * number of frames the decoded output will be delayed relative to
 816      * the encoded input.
 817      * - encoding: set by lavc.
 818      * - decoding: unused
 819      */
 820     int delay;
 821
 822     /* - encoding parameters */
 823     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 824     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 825
 826     /**
 827      * minimum quantizer.
 828      * - encoding: set by user.
 829      * - decoding: unused
 830      */
 831     int qmin;
 832
 833     /**
 834      * maximum quantizer.
 835      * - encoding: set by user.
 836      * - decoding: unused
 837      */
 838     int qmax;
 839
 840     /**
 841      * maximum quantizer difference etween frames.
 842      * - encoding: set by user.
 843      * - decoding: unused
 844      */
 845     int max_qdiff;
 846
 847     /**
 848      * maximum number of b frames between non b frames.
 849      * note: the output will be delayed by max_b_frames+1 relative to the input
 850      * - encoding: set by user.
 851      * - decoding: unused
 852      */
 853     int max_b_frames;
 854
 855     /**
 856      * qscale factor between ip and b frames.
 857      * - encoding: set by user.
 858      * - decoding: unused
 859      */
 860     float b_quant_factor;
 861
 862     /** obsolete FIXME remove */
 863     int rc_strategy;
 864 #define FF_RC_STRATEGY_XVID 1
 865
 866     int b_frame_strategy;
 867
 868     /**
 869      * hurry up amount.
 870      * deprecated in favor of skip_idct and skip_frame
 871      * - encoding: unused
 872      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 873      */
 874     int hurry_up;
 875
 876     struct AVCodec *codec;
 877
 878     void *priv_data;
 879
 880     /* unused, FIXME remove*/
 881     int rtp_mode;
 882
 883     int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
 884                             /* do it's best to deliver a chunk with size    */
 885                             /* below rtp_payload_size, the chunk will start */
 886                             /* with a start code on some codecs like H.263  */
 887                             /* This doesn't take account of any particular  */
 888                             /* headers inside the transmited RTP payload    */
 889
 890
 891     /* The RTP callback: This function is called   */
 892     /* every time the encoder has a packet to send */
 893     /* Depends on the encoder if the data starts   */
 894     /* with a Start Code (it should) H.263 does.   */
 895     /* mb_nb contains the number of macroblocks    */
 896     /* encoded in the RTP payload                  */
 897     void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
 898
 899     /* statistics, used for 2-pass encoding */
 900     int mv_bits;
 901     int header_bits;
 902     int i_tex_bits;
 903     int p_tex_bits;
 904     int i_count;
 905     int p_count;
 906     int skip_count;
 907     int misc_bits;
 908
 909     /**
 910      * number of bits used for the previously encoded frame.
 911      * - encoding: set by lavc
 912      * - decoding: unused
 913      */
 914     int frame_bits;
 915
 916     /**
 917      * private data of the user, can be used to carry app specific stuff.
 918      * - encoding: set by user
 919      * - decoding: set by user
 920      */
 921     void *opaque;
 922
 923     char codec_name[32];
 924     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 925     enum CodecID codec_id; /* see CODEC_ID_xxx */
 926
 927     /**
 928      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 929      * this is used to workaround some encoder bugs
 930      * - encoding: set by user, if not then the default based on codec_id will be used
 931      * - decoding: set by user, will be converted to upper case by lavc during init
 932      */
 933     unsigned int codec_tag;
 934
 935     /**
 936      * workaround bugs in encoders which sometimes cannot be detected automatically.
 937      * - encoding: set by user
 938      * - decoding: set by user
 939      */
 940     int workaround_bugs;
 941 #define FF_BUG_AUTODETECT       1  ///< autodetection
 942 #define FF_BUG_OLD_MSMPEG4      2
 943 #define FF_BUG_XVID_ILACE       4
 944 #define FF_BUG_UMP4             8
 945 #define FF_BUG_NO_PADDING       16
 946 #define FF_BUG_AMV              32
 947 #define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
 948 #define FF_BUG_QPEL_CHROMA      64
 949 #define FF_BUG_STD_QPEL         128
 950 #define FF_BUG_QPEL_CHROMA2     256
 951 #define FF_BUG_DIRECT_BLOCKSIZE 512
 952 #define FF_BUG_EDGE             1024
 953 #define FF_BUG_HPEL_CHROMA      2048
 954 #define FF_BUG_DC_CLIP          4096
 955 #define FF_BUG_MS               8192 ///< workaround various bugs in microsofts broken decoders
 956 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
 957
 958     /**
 959      * luma single coeff elimination threshold.
 960      * - encoding: set by user
 961      * - decoding: unused
 962      */
 963     int luma_elim_threshold;
 964
 965     /**
 966      * chroma single coeff elimination threshold.
 967      * - encoding: set by user
 968      * - decoding: unused
 969      */
 970     int chroma_elim_threshold;
 971
 972     /**
 973      * strictly follow the std (MPEG4, ...).
 974      * - encoding: set by user
 975      * - decoding: unused
 976      */
 977     int strict_std_compliance;
 978 #define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a older more strict version of the spec or reference software
 979 #define FF_COMPLIANCE_STRICT        1 ///< strictly conform to all the things in the spec no matter what consequences
 980 #define FF_COMPLIANCE_NORMAL        0
 981 #define FF_COMPLIANCE_INOFFICIAL   -1 ///< allow inofficial extensions
 982 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
 983
 984     /**
 985      * qscale offset between ip and b frames.
 986      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 987      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 988      * - encoding: set by user.
 989      * - decoding: unused
 990      */
 991     float b_quant_offset;
 992
 993     /**
 994      * error resilience higher values will detect more errors but may missdetect
 995      * some more or less valid parts as errors.
 996      * - encoding: unused
 997      * - decoding: set by user
 998      */
 999     int error_resilience;
1000 #define FF_ER_CAREFUL         1
1001 #define FF_ER_COMPLIANT       2
1002 #define FF_ER_AGGRESSIVE      3
1003 #define FF_ER_VERY_AGGRESSIVE 4
1004
1005     /**
1006      * called at the beginning of each frame to get a buffer for it.
1007      * if pic.reference is set then the frame will be read later by lavc
1008      * avcodec_align_dimensions() should be used to find the required width and
1009      * height, as they normally need to be rounded up to the next multiple of 16
1010      * - encoding: unused
1011      * - decoding: set by lavc, user can override
1012      */
1013     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1014
1015     /**
1016      * called to release buffers which where allocated with get_buffer.
1017      * a released buffer can be reused in get_buffer()
1018      * pic.data[*] must be set to NULL
1019      * - encoding: unused
1020      * - decoding: set by lavc, user can override
1021      */
1022     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1023
1024     /**
1025      * if 1 the stream has a 1 frame delay during decoding.
1026      * - encoding: set by lavc
1027      * - decoding: set by lavc
1028      */
1029     int has_b_frames;
1030
1031     /**
1032      * number of bytes per packet if constant and known or 0
1033      * used by some WAV based audio codecs
1034      */
1035     int block_align;
1036
1037     int parse_only; /* - decoding only: if true, only parsing is done
1038                        (function avcodec_parse_frame()). The frame
1039                        data is returned. Only MPEG codecs support this now. */
1040
1041     /**
1042      * 0-> h263 quant 1-> mpeg quant.
1043      * - encoding: set by user.
1044      * - decoding: unused
1045      */
1046     int mpeg_quant;
1047
1048     /**
1049      * pass1 encoding statistics output buffer.
1050      * - encoding: set by lavc
1051      * - decoding: unused
1052      */
1053     char *stats_out;
1054
1055     /**
1056      * pass2 encoding statistics input buffer.
1057      * concatenated stuff from stats_out of pass1 should be placed here
1058      * - encoding: allocated/set/freed by user
1059      * - decoding: unused
1060      */
1061     char *stats_in;
1062
1063     /**
1064      * ratecontrol qmin qmax limiting method.
1065      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1066      * - encoding: set by user.
1067      * - decoding: unused
1068      */
1069     float rc_qsquish;
1070
1071     float rc_qmod_amp;
1072     int rc_qmod_freq;
1073
1074     /**
1075      * ratecontrol override, see RcOverride.
1076      * - encoding: allocated/set/freed by user.
1077      * - decoding: unused
1078      */
1079     RcOverride *rc_override;
1080     int rc_override_count;
1081
1082     /**
1083      * rate control equation.
1084      * - encoding: set by user
1085      * - decoding: unused
1086      */
1087     char *rc_eq;
1088
1089     /**
1090      * maximum bitrate.
1091      * - encoding: set by user.
1092      * - decoding: unused
1093      */
1094     int rc_max_rate;
1095
1096     /**
1097      * minimum bitrate.
1098      * - encoding: set by user.
1099      * - decoding: unused
1100      */
1101     int rc_min_rate;
1102
1103     /**
1104      * decoder bitstream buffer size.
1105      * - encoding: set by user.
1106      * - decoding: unused
1107      */
1108     int rc_buffer_size;
1109     float rc_buffer_aggressivity;
1110
1111     /**
1112      * qscale factor between p and i frames.
1113      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1114      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1115      * - encoding: set by user.
1116      * - decoding: unused
1117      */
1118     float i_quant_factor;
1119
1120     /**
1121      * qscale offset between p and i frames.
1122      * - encoding: set by user.
1123      * - decoding: unused
1124      */
1125     float i_quant_offset;
1126
1127     /**
1128      * initial complexity for pass1 ratecontrol.
1129      * - encoding: set by user.
1130      * - decoding: unused
1131      */
1132     float rc_initial_cplx;
1133
1134     /**
1135      * dct algorithm, see FF_DCT_* below.
1136      * - encoding: set by user
1137      * - decoding: unused
1138      */
1139     int dct_algo;
1140 #define FF_DCT_AUTO    0
1141 #define FF_DCT_FASTINT 1
1142 #define FF_DCT_INT     2
1143 #define FF_DCT_MMX     3
1144 #define FF_DCT_MLIB    4
1145 #define FF_DCT_ALTIVEC 5
1146 #define FF_DCT_FAAN    6
1147
1148     /**
1149      * luminance masking (0-> disabled).
1150      * - encoding: set by user
1151      * - decoding: unused
1152      */
1153     float lumi_masking;
1154
1155     /**
1156      * temporary complexity masking (0-> disabled).
1157      * - encoding: set by user
1158      * - decoding: unused
1159      */
1160     float temporal_cplx_masking;
1161
1162     /**
1163      * spatial complexity masking (0-> disabled).
1164      * - encoding: set by user
1165      * - decoding: unused
1166      */
1167     float spatial_cplx_masking;
1168
1169     /**
1170      * p block masking (0-> disabled).
1171      * - encoding: set by user
1172      * - decoding: unused
1173      */
1174     float p_masking;
1175
1176     /**
1177      * darkness masking (0-> disabled).
1178      * - encoding: set by user
1179      * - decoding: unused
1180      */
1181     float dark_masking;
1182
1183
1184     /* for binary compatibility */
1185     int unused;
1186
1187     /**
1188      * idct algorithm, see FF_IDCT_* below.
1189      * - encoding: set by user
1190      * - decoding: set by user
1191      */
1192     int idct_algo;
1193 #define FF_IDCT_AUTO         0
1194 #define FF_IDCT_INT          1
1195 #define FF_IDCT_SIMPLE       2
1196 #define FF_IDCT_SIMPLEMMX    3
1197 #define FF_IDCT_LIBMPEG2MMX  4
1198 #define FF_IDCT_PS2          5
1199 #define FF_IDCT_MLIB         6
1200 #define FF_IDCT_ARM          7
1201 #define FF_IDCT_ALTIVEC      8
1202 #define FF_IDCT_SH4          9
1203 #define FF_IDCT_SIMPLEARM    10
1204 #define FF_IDCT_H264         11
1205 #define FF_IDCT_VP3          12
1206 #define FF_IDCT_IPP          13
1207 #define FF_IDCT_XVIDMMX      14
1208
1209     /**
1210      * slice count.
1211      * - encoding: set by lavc
1212      * - decoding: set by user (or 0)
1213      */
1214     int slice_count;
1215     /**
1216      * slice offsets in the frame in bytes.
1217      * - encoding: set/allocated by lavc
1218      * - decoding: set/allocated by user (or NULL)
1219      */
1220     int *slice_offset;
1221
1222     /**
1223      * error concealment flags.
1224      * - encoding: unused
1225      * - decoding: set by user
1226      */
1227     int error_concealment;
1228 #define FF_EC_GUESS_MVS   1
1229 #define FF_EC_DEBLOCK     2
1230
1231     /**
1232      * dsp_mask could be add used to disable unwanted CPU features
1233      * CPU features (i.e. MMX, SSE. ...)
1234      *
1235      * with FORCE flag you may instead enable given CPU features
1236      * (Dangerous: usable in case of misdetection, improper usage however will
1237      * result into program crash)
1238      */
1239     unsigned dsp_mask;
1240 #define FF_MM_FORCE    0x80000000 /* force usage of selected flags (OR) */
1241     /* lower 16 bits - CPU features */
1242 #ifdef HAVE_MMX
1243 #define FF_MM_MMX      0x0001 /* standard MMX */
1244 #define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1245 #define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1246 #define FF_MM_SSE      0x0008 /* SSE functions */
1247 #define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1248 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1249 #endif /* HAVE_MMX */
1250 #ifdef HAVE_IWMMXT
1251 #define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1252 #endif /* HAVE_IWMMXT */
1253
1254     /**
1255      * bits per sample/pixel from the demuxer (needed for huffyuv).
1256      * - encoding: set by lavc
1257      * - decoding: set by user
1258      */
1259      int bits_per_sample;
1260
1261     /**
1262      * prediction method (needed for huffyuv).
1263      * - encoding: set by user
1264      * - decoding: unused
1265      */
1266      int prediction_method;
1267 #define FF_PRED_LEFT   0
1268 #define FF_PRED_PLANE  1
1269 #define FF_PRED_MEDIAN 2
1270
1271     /**
1272      * sample aspect ratio (0 if unknown).
1273      * numerator and denominator must be relative prime and smaller then 256 for some video standards
1274      * - encoding: set by user.
1275      * - decoding: set by lavc.
1276      */
1277     AVRational sample_aspect_ratio;
1278
1279     /**
1280      * the picture in the bitstream.
1281      * - encoding: set by lavc
1282      * - decoding: set by lavc
1283      */
1284     AVFrame *coded_frame;
1285
1286     /**
1287      * debug.
1288      * - encoding: set by user.
1289      * - decoding: set by user.
1290      */
1291     int debug;
1292 #define FF_DEBUG_PICT_INFO 1
1293 #define FF_DEBUG_RC        2
1294 #define FF_DEBUG_BITSTREAM 4
1295 #define FF_DEBUG_MB_TYPE   8
1296 #define FF_DEBUG_QP        16
1297 #define FF_DEBUG_MV        32
1298 #define FF_DEBUG_DCT_COEFF 0x00000040
1299 #define FF_DEBUG_SKIP      0x00000080
1300 #define FF_DEBUG_STARTCODE 0x00000100
1301 #define FF_DEBUG_PTS       0x00000200
1302 #define FF_DEBUG_ER        0x00000400
1303 #define FF_DEBUG_MMCO      0x00000800
1304 #define FF_DEBUG_BUGS      0x00001000
1305 #define FF_DEBUG_VIS_QP    0x00002000
1306 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1307
1308     /**
1309      * debug.
1310      * - encoding: set by user.
1311      * - decoding: set by user.
1312      */
1313     int debug_mv;
1314 #define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1315 #define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1316 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1317
1318     /**
1319      * error.
1320      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1321      * - decoding: unused
1322      */
1323     uint64_t error[4];
1324
1325     /**
1326      * minimum MB quantizer.
1327      * - encoding: unused
1328      * - decoding: unused
1329      */
1330     int mb_qmin;
1331
1332     /**
1333      * maximum MB quantizer.
1334      * - encoding: unused
1335      * - decoding: unused
1336      */
1337     int mb_qmax;
1338
1339     /**
1340      * motion estimation compare function.
1341      * - encoding: set by user.
1342      * - decoding: unused
1343      */
1344     int me_cmp;
1345     /**
1346      * subpixel motion estimation compare function.
1347      * - encoding: set by user.
1348      * - decoding: unused
1349      */
1350     int me_sub_cmp;
1351     /**
1352      * macroblock compare function (not supported yet).
1353      * - encoding: set by user.
1354      * - decoding: unused
1355      */
1356     int mb_cmp;
1357     /**
1358      * interlaced dct compare function
1359      * - encoding: set by user.
1360      * - decoding: unused
1361      */
1362     int ildct_cmp;
1363 #define FF_CMP_SAD  0
1364 #define FF_CMP_SSE  1
1365 #define FF_CMP_SATD 2
1366 #define FF_CMP_DCT  3
1367 #define FF_CMP_PSNR 4
1368 #define FF_CMP_BIT  5
1369 #define FF_CMP_RD   6
1370 #define FF_CMP_ZERO 7
1371 #define FF_CMP_VSAD 8
1372 #define FF_CMP_VSSE 9
1373 #define FF_CMP_NSSE 10
1374 #define FF_CMP_W53  11
1375 #define FF_CMP_W97  12
1376 #define FF_CMP_DCTMAX 13
1377 #define FF_CMP_DCT264 14
1378 #define FF_CMP_CHROMA 256
1379
1380     /**
1381      * ME diamond size & shape.
1382      * - encoding: set by user.
1383      * - decoding: unused
1384      */
1385     int dia_size;
1386
1387     /**
1388      * amount of previous MV predictors (2a+1 x 2a+1 square).
1389      * - encoding: set by user.
1390      * - decoding: unused
1391      */
1392     int last_predictor_count;
1393
1394     /**
1395      * pre pass for motion estimation.
1396      * - encoding: set by user.
1397      * - decoding: unused
1398      */
1399     int pre_me;
1400
1401     /**
1402      * motion estimation pre pass compare function.
1403      * - encoding: set by user.
1404      * - decoding: unused
1405      */
1406     int me_pre_cmp;
1407
1408     /**
1409      * ME pre pass diamond size & shape.
1410      * - encoding: set by user.
1411      * - decoding: unused
1412      */
1413     int pre_dia_size;
1414
1415     /**
1416      * subpel ME quality.
1417      * - encoding: set by user.
1418      * - decoding: unused
1419      */
1420     int me_subpel_quality;
1421
1422     /**
1423      * callback to negotiate the pixelFormat.
1424      * @param fmt is the list of formats which are supported by the codec,
1425      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1426      * the first is allways the native one
1427      * @return the choosen format
1428      * - encoding: unused
1429      * - decoding: set by user, if not set then the native format will always be choosen
1430      */
1431     enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1432
1433     /**
1434      * DTG active format information (additionnal aspect ratio
1435      * information only used in DVB MPEG2 transport streams). 0 if
1436      * not set.
1437      *
1438      * - encoding: unused.
1439      * - decoding: set by decoder
1440      */
1441     int dtg_active_format;
1442 #define FF_DTG_AFD_SAME         8
1443 #define FF_DTG_AFD_4_3          9
1444 #define FF_DTG_AFD_16_9         10
1445 #define FF_DTG_AFD_14_9         11
1446 #define FF_DTG_AFD_4_3_SP_14_9  13
1447 #define FF_DTG_AFD_16_9_SP_14_9 14
1448 #define FF_DTG_AFD_SP_4_3       15
1449
1450     /**
1451      * Maximum motion estimation search range in subpel units.
1452      * if 0 then no limit
1453      *
1454      * - encoding: set by user.
1455      * - decoding: unused.
1456      */
1457     int me_range;
1458
1459     /**
1460      * intra quantizer bias.
1461      * - encoding: set by user.
1462      * - decoding: unused
1463      */
1464     int intra_quant_bias;
1465 #define FF_DEFAULT_QUANT_BIAS 999999
1466
1467     /**
1468      * inter quantizer bias.
1469      * - encoding: set by user.
1470      * - decoding: unused
1471      */
1472     int inter_quant_bias;
1473
1474     /**
1475      * color table ID.
1476      * - encoding: unused.
1477      * - decoding: which clrtable should be used for 8bit RGB images
1478      *             table have to be stored somewhere FIXME
1479      */
1480     int color_table_id;
1481
1482     /**
1483      * internal_buffer count.
1484      * Don't touch, used by lavc default_get_buffer()
1485      */
1486     int internal_buffer_count;
1487
1488     /**
1489      * internal_buffers.
1490      * Don't touch, used by lavc default_get_buffer()
1491      */
1492     void *internal_buffer;
1493
1494 #define FF_LAMBDA_SHIFT 7
1495 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1496 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1497 #define FF_LAMBDA_MAX (256*128-1)
1498
1499 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1500     /**
1501      * global quality for codecs which cannot change it per frame.
1502      * this should be proportional to MPEG1/2/4 qscale.
1503      * - encoding: set by user.
1504      * - decoding: unused
1505      */
1506     int global_quality;
1507
1508 #define FF_CODER_TYPE_VLC   0
1509 #define FF_CODER_TYPE_AC    1
1510     /**
1511      * coder type
1512      * - encoding: set by user.
1513      * - decoding: unused
1514      */
1515     int coder_type;
1516
1517     /**
1518      * context model
1519      * - encoding: set by user.
1520      * - decoding: unused
1521      */
1522     int context_model;
1523 #if 0
1524     /**
1525      *
1526      * - encoding: unused
1527      * - decoding: set by user.
1528      */
1529     uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1530 #endif
1531
1532     /**
1533      * slice flags
1534      * - encoding: unused
1535      * - decoding: set by user.
1536      */
1537     int slice_flags;
1538 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1539 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1540 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1541
1542     /**
1543      * XVideo Motion Acceleration
1544      * - encoding: forbidden
1545      * - decoding: set by decoder
1546      */
1547     int xvmc_acceleration;
1548
1549     /**
1550      * macroblock decision mode
1551      * - encoding: set by user.
1552      * - decoding: unused
1553      */
1554     int mb_decision;
1555 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1556 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1557 #define FF_MB_DECISION_RD     2        ///< rate distoration
1558
1559     /**
1560      * custom intra quantization matrix
1561      * - encoding: set by user, can be NULL
1562      * - decoding: set by lavc
1563      */
1564     uint16_t *intra_matrix;
1565
1566     /**
1567      * custom inter quantization matrix
1568      * - encoding: set by user, can be NULL
1569      * - decoding: set by lavc
1570      */
1571     uint16_t *inter_matrix;
1572
1573     /**
1574      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1575      * this is used to workaround some encoder bugs
1576      * - encoding: unused
1577      * - decoding: set by user, will be converted to upper case by lavc during init
1578      */
1579     unsigned int stream_codec_tag;
1580
1581     /**
1582      * scene change detection threshold.
1583      * 0 is default, larger means fewer detected scene changes
1584      * - encoding: set by user.
1585      * - decoding: unused
1586      */
1587     int scenechange_threshold;
1588
1589     /**
1590      * minimum lagrange multipler
1591      * - encoding: set by user.
1592      * - decoding: unused
1593      */
1594     int lmin;
1595
1596     /**
1597      * maximum lagrange multipler
1598      * - encoding: set by user.
1599      * - decoding: unused
1600      */
1601     int lmax;
1602
1603     /**
1604      * Palette control structure
1605      * - encoding: ??? (no palette-enabled encoder yet)
1606      * - decoding: set by user.
1607      */
1608     struct AVPaletteControl *palctrl;
1609
1610     /**
1611      * noise reduction strength
1612      * - encoding: set by user.
1613      * - decoding: unused
1614      */
1615     int noise_reduction;
1616
1617     /**
1618      * called at the beginning of a frame to get cr buffer for it.
1619      * buffer type (size, hints) must be the same. lavc won't check it.
1620      * lavc will pass previous buffer in pic, function should return
1621      * same buffer or new buffer with old frame "painted" into it.
1622      * if pic.data[0] == NULL must behave like get_buffer().
1623      * - encoding: unused
1624      * - decoding: set by lavc, user can override
1625      */
1626     int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1627
1628     /**
1629      * number of bits which should be loaded into the rc buffer before decoding starts
1630      * - encoding: set by user.
1631      * - decoding: unused
1632      */
1633     int rc_initial_buffer_occupancy;
1634
1635     /**
1636      *
1637      * - encoding: set by user.
1638      * - decoding: unused
1639      */
1640     int inter_threshold;
1641
1642     /**
1643      * CODEC_FLAG2_*.
1644      * - encoding: set by user.
1645      * - decoding: set by user.
1646      */
1647     int flags2;
1648
1649     /**
1650      * simulates errors in the bitstream to test error concealment.
1651      * - encoding: set by user.
1652      * - decoding: unused.
1653      */
1654     int error_rate;
1655
1656     /**
1657      * MP3 antialias algorithm, see FF_AA_* below.
1658      * - encoding: unused
1659      * - decoding: set by user
1660      */
1661     int antialias_algo;
1662 #define FF_AA_AUTO    0
1663 #define FF_AA_FASTINT 1 //not implemented yet
1664 #define FF_AA_INT     2
1665 #define FF_AA_FLOAT   3
1666     /**
1667      * Quantizer noise shaping.
1668      * - encoding: set by user
1669      * - decoding: unused
1670      */
1671     int quantizer_noise_shaping;
1672
1673     /**
1674      * Thread count.
1675      * is used to decide how many independant tasks should be passed to execute()
1676      * - encoding: set by user
1677      * - decoding: set by user
1678      */
1679     int thread_count;
1680
1681     /**
1682      * the codec may call this to execute several independant things. it will return only after
1683      * finishing all tasks, the user may replace this with some multithreaded implementation, the
1684      * default implementation will execute the parts serially
1685      * @param count the number of things to execute
1686      * - encoding: set by lavc, user can override
1687      * - decoding: set by lavc, user can override
1688      */
1689     int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1690
1691     /**
1692      * Thread opaque.
1693      * can be used by execute() to store some per AVCodecContext stuff.
1694      * - encoding: set by execute()
1695      * - decoding: set by execute()
1696      */
1697     void *thread_opaque;
1698
1699     /**
1700      * Motion estimation threshold. under which no motion estimation is
1701      * performed, but instead the user specified motion vectors are used
1702      *
1703      * - encoding: set by user
1704      * - decoding: unused
1705      */
1706      int me_threshold;
1707
1708     /**
1709      * Macroblock threshold. under which the user specified macroblock types will be used
1710      * - encoding: set by user
1711      * - decoding: unused
1712      */
1713      int mb_threshold;
1714
1715     /**
1716      * precision of the intra dc coefficient - 8.
1717      * - encoding: set by user
1718      * - decoding: unused
1719      */
1720      int intra_dc_precision;
1721
1722     /**
1723      * noise vs. sse weight for the nsse comparsion function.
1724      * - encoding: set by user
1725      * - decoding: unused
1726      */
1727      int nsse_weight;
1728
1729     /**
1730      * number of macroblock rows at the top which are skipped.
1731      * - encoding: unused
1732      * - decoding: set by user
1733      */
1734      int skip_top;
1735
1736     /**
1737      * number of macroblock rows at the bottom which are skipped.
1738      * - encoding: unused
1739      * - decoding: set by user
1740      */
1741      int skip_bottom;
1742
1743     /**
1744      * profile
1745      * - encoding: set by user
1746      * - decoding: set by lavc
1747      */
1748      int profile;
1749 #define FF_PROFILE_UNKNOWN -99
1750
1751     /**
1752      * level
1753      * - encoding: set by user
1754      * - decoding: set by lavc
1755      */
1756      int level;
1757 #define FF_LEVEL_UNKNOWN -99
1758
1759     /**
1760      * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1761      * - encoding: unused
1762      * - decoding: set by user
1763      */
1764      int lowres;
1765
1766     /**
1767      * bitsream width / height. may be different from width/height if lowres
1768      * or other things are used
1769      * - encoding: unused
1770      * - decoding: set by user before init if known, codec should override / dynamically change if needed
1771      */
1772     int coded_width, coded_height;
1773
1774     /**
1775      * frame skip threshold
1776      * - encoding: set by user
1777      * - decoding: unused
1778      */
1779     int frame_skip_threshold;
1780
1781     /**
1782      * frame skip factor
1783      * - encoding: set by user
1784      * - decoding: unused
1785      */
1786     int frame_skip_factor;
1787
1788     /**
1789      * frame skip exponent
1790      * - encoding: set by user
1791      * - decoding: unused
1792      */
1793     int frame_skip_exp;
1794
1795     /**
1796      * frame skip comparission function
1797      * - encoding: set by user.
1798      * - decoding: unused
1799      */
1800     int frame_skip_cmp;
1801
1802     /**
1803      * border processing masking. raises the quantizer for mbs on the borders
1804      * of the picture.
1805      * - encoding: set by user
1806      * - decoding: unused
1807      */
1808     float border_masking;
1809
1810     /**
1811      * minimum MB lagrange multipler.
1812      * - encoding: set by user.
1813      * - decoding: unused
1814      */
1815     int mb_lmin;
1816
1817     /**
1818      * maximum MB lagrange multipler.
1819      * - encoding: set by user.
1820      * - decoding: unused
1821      */
1822     int mb_lmax;
1823
1824     /**
1825      *
1826      * - encoding: set by user.
1827      * - decoding: unused
1828      */
1829     int me_penalty_compensation;
1830
1831     /**
1832      *
1833      * - encoding: unused
1834      * - decoding: set by user.
1835      */
1836     enum AVDiscard skip_loop_filter;
1837
1838     /**
1839      *
1840      * - encoding: unused
1841      * - decoding: set by user.
1842      */
1843     enum AVDiscard skip_idct;
1844
1845     /**
1846      *
1847      * - encoding: unused
1848      * - decoding: set by user.
1849      */
1850     enum AVDiscard skip_frame;
1851
1852     /**
1853      *
1854      * - encoding: set by user.
1855      * - decoding: unused
1856      */
1857     int bidir_refine;
1858
1859     /**
1860      *
1861      * - encoding: set by user.
1862      * - decoding: unused
1863      */
1864     int brd_scale;
1865
1866     /**
1867      * constant rate factor - quality-based VBR - values ~correspond to qps
1868      * - encoding: set by user.
1869      * - decoding: unused
1870      */
1871     int crf;
1872
1873     /**
1874      * constant quantization parameter rate control method
1875      * - encoding: set by user.
1876      * - decoding: unused
1877      */
1878     int cqp;
1879
1880     /**
1881      * minimum gop size
1882      * - encoding: set by user.
1883      * - decoding: unused
1884      */
1885     int keyint_min;
1886
1887     /**
1888      * number of reference frames
1889      * - encoding: set by user.
1890      * - decoding: unused
1891      */
1892     int refs;
1893
1894     /**
1895      * chroma qp offset from luma
1896      * - encoding: set by user.
1897      * - decoding: unused
1898      */
1899     int chromaoffset;
1900
1901     /**
1902      * influences how often b-frames are used
1903      * - encoding: set by user.
1904      * - decoding: unused
1905      */
1906     int bframebias;
1907
1908     /**
1909      * trellis RD quantization
1910      * - encoding: set by user.
1911      * - decoding: unused
1912      */
1913     int trellis;
1914
1915     /**
1916      * reduce fluctuations in qp (before curve compression)
1917      * - encoding: set by user.
1918      * - decoding: unused
1919      */
1920     float complexityblur;
1921
1922     /**
1923      * in-loop deblocking filter alphac0 parameter
1924      * alpha is in the range -6...6
1925      * - encoding: set by user.
1926      * - decoding: unused
1927      */
1928     int deblockalpha;
1929
1930     /**
1931      * in-loop deblocking filter beta parameter
1932      * beta is in the range -6...6
1933      * - encoding: set by user.
1934      * - decoding: unused
1935      */
1936     int deblockbeta;
1937
1938     /**
1939      * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1940      * - encoding: set by user.
1941      * - decoding: unused
1942      */
1943     int partitions;
1944 #define X264_PART_I4X4 0x001  /* Analyse i4x4 */
1945 #define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
1946 #define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
1947 #define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
1948 #define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
1949
1950     /**
1951      * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1952      * - encoding: set by user.
1953      * - decoding: unused
1954      */
1955     int directpred;
1956
1957     /**
1958      * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1959      * - encoding: set by user.
1960      * - decoding: unused
1961      */
1962     int cutoff;
1963
1964     /**
1965      * multiplied by qscale for each frame and added to scene_change_score
1966      * - encoding: set by user.
1967      * - decoding: unused
1968      */
1969     int scenechange_factor;
1970 } AVCodecContext;
1971
1972 /**
1973  * AVCodec.
1974  */
1975 typedef struct AVCodec {
1976     const char *name;
1977     enum CodecType type;
1978     enum CodecID id;
1979     int priv_data_size;
1980     int (*init)(AVCodecContext *);
1981     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1982     int (*close)(AVCodecContext *);
1983     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1984                   uint8_t *buf, int buf_size);
1985     int capabilities;
1986 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
1987     void *dummy; // FIXME remove next time we break binary compatibility
1988 #endif
1989     struct AVCodec *next;
1990     void (*flush)(AVCodecContext *);
1991     const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1992     const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1993 } AVCodec;
1994
1995 /**
1996  * four components are given, that's all.
1997  * the last component is alpha
1998  */
1999 typedef struct AVPicture {
2000     uint8_t *data[4];
2001     int linesize[4];       ///< number of bytes per line
2002 } AVPicture;
2003
2004 /**
2005  * AVPaletteControl
2006  * This structure defines a method for communicating palette changes
2007  * between and demuxer and a decoder.
2008  */
2009 #define AVPALETTE_SIZE 1024
2010 #define AVPALETTE_COUNT 256
2011 typedef struct AVPaletteControl {
2012
2013     /* demuxer sets this to 1 to indicate the palette has changed;
2014      * decoder resets to 0 */
2015     int palette_changed;
2016
2017     /* 4-byte ARGB palette entries, stored in native byte order; note that
2018      * the individual palette components should be on a 8-bit scale; if
2019      * the palette data comes from a IBM VGA native format, the component
2020      * data is probably 6 bits in size and needs to be scaled */
2021     unsigned int palette[AVPALETTE_COUNT];
2022
2023 } AVPaletteControl;
2024
2025 typedef struct AVSubtitleRect {
2026     uint16_t x;
2027     uint16_t y;
2028     uint16_t w;
2029     uint16_t h;
2030     uint16_t nb_colors;
2031     int linesize;
2032     uint32_t *rgba_palette;
2033     uint8_t *bitmap;
2034 } AVSubtitleRect;
2035
2036 typedef struct AVSubtitle {
2037     uint16_t format; /* 0 = graphics */
2038     uint32_t start_display_time; /* relative to packet pts, in ms */
2039     uint32_t end_display_time; /* relative to packet pts, in ms */
2040     uint32_t num_rects;
2041     AVSubtitleRect *rects;
2042 } AVSubtitle;
2043
2044 extern AVCodec ac3_encoder;
2045 extern AVCodec mp2_encoder;
2046 extern AVCodec mp3lame_encoder;
2047 extern AVCodec oggvorbis_encoder;
2048 extern AVCodec oggtheora_encoder;
2049 extern AVCodec faac_encoder;
2050 extern AVCodec xvid_encoder;
2051 extern AVCodec mpeg1video_encoder;
2052 extern AVCodec mpeg2video_encoder;
2053 extern AVCodec h261_encoder;
2054 extern AVCodec h263_encoder;
2055 extern AVCodec h263p_encoder;
2056 extern AVCodec flv_encoder;
2057 extern AVCodec rv10_encoder;
2058 extern AVCodec rv20_encoder;
2059 extern AVCodec dvvideo_encoder;
2060 extern AVCodec mjpeg_encoder;
2061 extern AVCodec ljpeg_encoder;
2062 extern AVCodec jpegls_encoder;
2063 extern AVCodec png_encoder;
2064 extern AVCodec ppm_encoder;
2065 extern AVCodec pgm_encoder;
2066 extern AVCodec pgmyuv_encoder;
2067 extern AVCodec pbm_encoder;
2068 extern AVCodec pam_encoder;
2069 extern AVCodec mpeg4_encoder;
2070 extern AVCodec msmpeg4v1_encoder;
2071 extern AVCodec msmpeg4v2_encoder;
2072 extern AVCodec msmpeg4v3_encoder;
2073 extern AVCodec wmv1_encoder;
2074 extern AVCodec wmv2_encoder;
2075 extern AVCodec huffyuv_encoder;
2076 extern AVCodec ffvhuff_encoder;
2077 extern AVCodec h264_encoder;
2078 extern AVCodec asv1_encoder;
2079 extern AVCodec asv2_encoder;
2080 extern AVCodec vcr1_encoder;
2081 extern AVCodec ffv1_encoder;
2082 extern AVCodec snow_encoder;
2083 extern AVCodec mdec_encoder;
2084 extern AVCodec zlib_encoder;
2085 extern AVCodec sonic_encoder;
2086 extern AVCodec sonic_ls_encoder;
2087 extern AVCodec svq1_encoder;
2088 extern AVCodec x264_encoder;
2089
2090 extern AVCodec h263_decoder;
2091 extern AVCodec h261_decoder;
2092 extern AVCodec mpeg4_decoder;
2093 extern AVCodec msmpeg4v1_decoder;
2094 extern AVCodec msmpeg4v2_decoder;
2095 extern AVCodec msmpeg4v3_decoder;
2096 extern AVCodec wmv1_decoder;
2097 extern AVCodec wmv2_decoder;
2098 extern AVCodec vc9_decoder;
2099 extern AVCodec wmv3_decoder;
2100 extern AVCodec mpeg1video_decoder;
2101 extern AVCodec mpeg2video_decoder;
2102 extern AVCodec mpegvideo_decoder;
2103 extern AVCodec mpeg_xvmc_decoder;
2104 extern AVCodec h263i_decoder;
2105 extern AVCodec flv_decoder;
2106 extern AVCodec rv10_decoder;
2107 extern AVCodec rv20_decoder;
2108 extern AVCodec rv30_decoder;
2109 extern AVCodec rv40_decoder;
2110 extern AVCodec svq1_decoder;
2111 extern AVCodec svq3_decoder;
2112 extern AVCodec dvvideo_decoder;
2113 extern AVCodec wmav1_decoder;
2114 extern AVCodec wmav2_decoder;
2115 extern AVCodec mjpeg_decoder;
2116 extern AVCodec mjpegb_decoder;
2117 extern AVCodec sp5x_decoder;
2118 extern AVCodec png_decoder;
2119 extern AVCodec mp2_decoder;
2120 extern AVCodec mp3_decoder;
2121 extern AVCodec mp3adu_decoder;
2122 extern AVCodec mp3on4_decoder;
2123 extern AVCodec qdm2_decoder;
2124 extern AVCodec cook_decoder;
2125 extern AVCodec truespeech_decoder;
2126 extern AVCodec tta_decoder;
2127 extern AVCodec mace3_decoder;
2128 extern AVCodec mace6_decoder;
2129 extern AVCodec huffyuv_decoder;
2130 extern AVCodec ffvhuff_decoder;
2131 extern AVCodec oggvorbis_decoder;
2132 extern AVCodec oggtheora_decoder;
2133 extern AVCodec cyuv_decoder;
2134 extern AVCodec h264_decoder;
2135 extern AVCodec indeo3_decoder;
2136 extern AVCodec vp3_decoder;
2137 extern AVCodec theora_decoder;
2138 extern AVCodec amr_nb_decoder;
2139 extern AVCodec amr_nb_encoder;
2140 extern AVCodec amr_wb_encoder;
2141 extern AVCodec amr_wb_decoder;
2142 extern AVCodec aac_decoder;
2143 extern AVCodec mpeg4aac_decoder;
2144 extern AVCodec asv1_decoder;
2145 extern AVCodec asv2_decoder;
2146 extern AVCodec vcr1_decoder;
2147 extern AVCodec cljr_decoder;
2148 extern AVCodec ffv1_decoder;
2149 extern AVCodec snow_decoder;
2150 extern AVCodec fourxm_decoder;
2151 extern AVCodec mdec_decoder;
2152 extern AVCodec roq_decoder;
2153 extern AVCodec interplay_video_decoder;
2154 extern AVCodec xan_wc3_decoder;
2155 extern AVCodec rpza_decoder;
2156 extern AVCodec cinepak_decoder;
2157 extern AVCodec msrle_decoder;
2158 extern AVCodec msvideo1_decoder;
2159 extern AVCodec vqa_decoder;
2160 extern AVCodec idcin_decoder;
2161 extern AVCodec eightbps_decoder;
2162 extern AVCodec smc_decoder;
2163 extern AVCodec flic_decoder;
2164 extern AVCodec vmdvideo_decoder;
2165 extern AVCodec vmdaudio_decoder;
2166 extern AVCodec truemotion1_decoder;
2167 extern AVCodec truemotion2_decoder;
2168 extern AVCodec mszh_decoder;
2169 extern AVCodec zlib_decoder;
2170 extern AVCodec ra_144_decoder;
2171 extern AVCodec ra_288_decoder;
2172 extern AVCodec roq_dpcm_decoder;
2173 extern AVCodec interplay_dpcm_decoder;
2174 extern AVCodec xan_dpcm_decoder;
2175 extern AVCodec sol_dpcm_decoder;
2176 extern AVCodec sonic_decoder;
2177 extern AVCodec qtrle_decoder;
2178 extern AVCodec flac_decoder;
2179 extern AVCodec tscc_decoder;
2180 extern AVCodec cscd_decoder;
2181 extern AVCodec nuv_decoder;
2182 extern AVCodec ulti_decoder;
2183 extern AVCodec qdraw_decoder;
2184 extern AVCodec xl_decoder;
2185 extern AVCodec qpeg_decoder;
2186 extern AVCodec shorten_decoder;
2187 extern AVCodec loco_decoder;
2188 extern AVCodec wnv1_decoder;
2189 extern AVCodec aasc_decoder;
2190 extern AVCodec alac_decoder;
2191 extern AVCodec ws_snd1_decoder;
2192 extern AVCodec indeo2_decoder;
2193 extern AVCodec vorbis_decoder;
2194 extern AVCodec fraps_decoder;
2195 extern AVCodec libgsm_encoder;
2196 extern AVCodec libgsm_decoder;
2197 extern AVCodec bmp_decoder;
2198 extern AVCodec mmvideo_decoder;
2199 extern AVCodec zmbv_decoder;
2200 extern AVCodec avs_decoder;
2201 extern AVCodec smacker_decoder;
2202 extern AVCodec smackaud_decoder;
2203
2204 /* pcm codecs */
2205 #define PCM_CODEC(id, name) \
2206 extern AVCodec name ## _decoder; \
2207 extern AVCodec name ## _encoder
2208
2209 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2210 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2211 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2212 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2213 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2214 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2215 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2216 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2217 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2218 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2219 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2220 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2221 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2222 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2223 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2224 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2225 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2226
2227 /* adpcm codecs */
2228
2229 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2230 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2231 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2232 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2233 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2234 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2235 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2236 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2237 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2238 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2239 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2240 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2241 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2242 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2243 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2244 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2245 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2246 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2247
2248 #undef PCM_CODEC
2249
2250 /* dummy raw video codec */
2251 extern AVCodec rawvideo_encoder;
2252 extern AVCodec rawvideo_decoder;
2253
2254 /* the following codecs use external GPL libs */
2255 extern AVCodec ac3_decoder;
2256 extern AVCodec dts_decoder;
2257
2258 /* subtitles */
2259 extern AVCodec dvdsub_encoder;
2260 extern AVCodec dvdsub_decoder;
2261 extern AVCodec dvbsub_encoder;
2262 extern AVCodec dvbsub_decoder;
2263
2264 /* resample.c */
2265
2266 struct ReSampleContext;
2267 struct AVResampleContext;
2268
2269 typedef struct ReSampleContext ReSampleContext;
2270
2271 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2272                                      int output_rate, int input_rate);
2273 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2274 void audio_resample_close(ReSampleContext *s);
2275
2276 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2277 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2278 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2279 void av_resample_close(struct AVResampleContext *c);
2280
2281 /* YUV420 format is assumed ! */
2282
2283 struct ImgReSampleContext;
2284
2285 typedef struct ImgReSampleContext ImgReSampleContext;
2286
2287 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2288                                       int input_width, int input_height);
2289
2290 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2291                                       int iwidth, int iheight,
2292                                       int topBand, int bottomBand,
2293                                       int leftBand, int rightBand,
2294                                       int padtop, int padbottom,
2295                                       int padleft, int padright);
2296
2297
2298 void img_resample(ImgReSampleContext *s,
2299                   AVPicture *output, const AVPicture *input);
2300
2301 void img_resample_close(ImgReSampleContext *s);
2302
2303 /**
2304  * Allocate memory for a picture.  Call avpicture_free to free it.
2305  *
2306  * @param picture the picture to be filled in.
2307  * @param pix_fmt the format of the picture.
2308  * @param width the width of the picture.
2309  * @param height the height of the picture.
2310  * @return 0 if successful, -1 if not.
2311  */
2312 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2313
2314 /* Free a picture previously allocated by avpicture_alloc. */
2315 void avpicture_free(AVPicture *picture);
2316
2317 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2318                    int pix_fmt, int width, int height);
2319 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2320                      unsigned char *dest, int dest_size);
2321 int avpicture_get_size(int pix_fmt, int width, int height);
2322 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2323 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2324 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2325 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2326 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2327
2328 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
2329 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
2330 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
2331 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
2332 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
2333 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2334
2335 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2336                              int has_alpha);
2337 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2338                               int has_alpha, int *loss_ptr);
2339
2340 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2341 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2342 int img_get_alpha_info(const AVPicture *src,
2343                        int pix_fmt, int width, int height);
2344
2345 /* convert among pixel formats */
2346 int img_convert(AVPicture *dst, int dst_pix_fmt,
2347                 const AVPicture *src, int pix_fmt,
2348                 int width, int height);
2349
2350 /* deinterlace a picture */
2351 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2352                           int pix_fmt, int width, int height);
2353
2354 /* external high level API */
2355
2356 extern AVCodec *first_avcodec;
2357
2358 /* returns LIBAVCODEC_VERSION_INT constant */
2359 unsigned avcodec_version(void);
2360 /* returns LIBAVCODEC_BUILD constant */
2361 unsigned avcodec_build(void);
2362 void avcodec_init(void);
2363
2364 void register_avcodec(AVCodec *format);
2365 AVCodec *avcodec_find_encoder(enum CodecID id);
2366 AVCodec *avcodec_find_encoder_by_name(const char *name);
2367 AVCodec *avcodec_find_decoder(enum CodecID id);
2368 AVCodec *avcodec_find_decoder_by_name(const char *name);
2369 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2370
2371 void avcodec_get_context_defaults(AVCodecContext *s);
2372 AVCodecContext *avcodec_alloc_context(void);
2373 void avcodec_get_frame_defaults(AVFrame *pic);
2374 AVFrame *avcodec_alloc_frame(void);
2375
2376 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2377 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2378 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2379 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2380 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2381 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2382
2383 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2384 void avcodec_thread_free(AVCodecContext *s);
2385 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2386 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2387 //FIXME func typedef
2388
2389 /**
2390  * opens / inits the AVCodecContext.
2391  * not thread save!
2392  */
2393 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2394
2395 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2396                          int *frame_size_ptr,
2397                          uint8_t *buf, int buf_size);
2398 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2399                          int *got_picture_ptr,
2400                          uint8_t *buf, int buf_size);
2401 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2402                             int *got_sub_ptr,
2403                             const uint8_t *buf, int buf_size);
2404 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2405                         int *data_size_ptr,
2406                         uint8_t *buf, int buf_size);
2407 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2408                          const short *samples);
2409 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2410                          const AVFrame *pict);
2411 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2412                             const AVSubtitle *sub);
2413
2414 int avcodec_close(AVCodecContext *avctx);
2415
2416 void avcodec_register_all(void);
2417
2418 void avcodec_flush_buffers(AVCodecContext *avctx);
2419
2420 void avcodec_default_free_buffers(AVCodecContext *s);
2421
2422 /* misc usefull functions */
2423
2424 /**
2425  * returns a single letter to describe the picture type
2426  */
2427 char av_get_pict_type_char(int pict_type);
2428
2429
2430 /* frame parsing */
2431 typedef struct AVCodecParserContext {
2432     void *priv_data;
2433     struct AVCodecParser *parser;
2434     int64_t frame_offset; /* offset of the current frame */
2435     int64_t cur_offset; /* current offset
2436                            (incremented by each av_parser_parse()) */
2437     int64_t last_frame_offset; /* offset of the last frame */
2438     /* video info */
2439     int pict_type; /* XXX: put it back in AVCodecContext */
2440     int repeat_pict; /* XXX: put it back in AVCodecContext */
2441     int64_t pts;     /* pts of the current frame */
2442     int64_t dts;     /* dts of the current frame */
2443
2444     /* private data */
2445     int64_t last_pts;
2446     int64_t last_dts;
2447     int fetch_timestamp;
2448
2449 #define AV_PARSER_PTS_NB 4
2450     int cur_frame_start_index;
2451     int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2452     int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2453     int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2454
2455     int flags;
2456 #define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2457 } AVCodecParserContext;
2458
2459 typedef struct AVCodecParser {
2460     int codec_ids[5]; /* several codec IDs are permitted */
2461     int priv_data_size;
2462     int (*parser_init)(AVCodecParserContext *s);
2463     int (*parser_parse)(AVCodecParserContext *s,
2464                         AVCodecContext *avctx,
2465                         uint8_t **poutbuf, int *poutbuf_size,
2466                         const uint8_t *buf, int buf_size);
2467     void (*parser_close)(AVCodecParserContext *s);
2468     int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2469     struct AVCodecParser *next;
2470 } AVCodecParser;
2471
2472 extern AVCodecParser *av_first_parser;
2473
2474 void av_register_codec_parser(AVCodecParser *parser);
2475 AVCodecParserContext *av_parser_init(int codec_id);
2476 int av_parser_parse(AVCodecParserContext *s,
2477                     AVCodecContext *avctx,
2478                     uint8_t **poutbuf, int *poutbuf_size,
2479                     const uint8_t *buf, int buf_size,
2480                     int64_t pts, int64_t dts);
2481 int av_parser_change(AVCodecParserContext *s,
2482                      AVCodecContext *avctx,
2483                      uint8_t **poutbuf, int *poutbuf_size,
2484                      const uint8_t *buf, int buf_size, int keyframe);
2485 void av_parser_close(AVCodecParserContext *s);
2486
2487 extern AVCodecParser mpegvideo_parser;
2488 extern AVCodecParser mpeg4video_parser;
2489 extern AVCodecParser h261_parser;
2490 extern AVCodecParser h263_parser;
2491 extern AVCodecParser h264_parser;
2492 extern AVCodecParser mjpeg_parser;
2493 extern AVCodecParser pnm_parser;
2494 extern AVCodecParser mpegaudio_parser;
2495 extern AVCodecParser ac3_parser;
2496 extern AVCodecParser dvdsub_parser;
2497 extern AVCodecParser dvbsub_parser;
2498 extern AVCodecParser aac_parser;
2499
2500 /* memory */
2501 void *av_malloc(unsigned int size);
2502 void *av_mallocz(unsigned int size);
2503 void *av_realloc(void *ptr, unsigned int size);
2504 void av_free(void *ptr);
2505 char *av_strdup(const char *s);
2506 void av_freep(void *ptr);
2507 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2508 /* for static data only */
2509 /* call av_free_static to release all staticaly allocated tables */
2510 void av_free_static(void);
2511 void *av_mallocz_static(unsigned int size);
2512 void *av_realloc_static(void *ptr, unsigned int size);
2513
2514 /* add by bero : in adx.c */
2515 int is_adx(const unsigned char *buf,size_t bufsize);
2516
2517 void img_copy(AVPicture *dst, const AVPicture *src,
2518               int pix_fmt, int width, int height);
2519
2520 int img_crop(AVPicture *dst, const AVPicture *src,
2521              int pix_fmt, int top_band, int left_band);
2522
2523 /* av_log API */
2524
2525 #include <stdarg.h>
2526
2527 #define AV_LOG_QUIET -1
2528 #define AV_LOG_ERROR 0
2529 #define AV_LOG_INFO 1
2530 #define AV_LOG_DEBUG 2
2531
2532 #ifdef __GNUC__
2533 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2534 #else
2535 extern void av_log(void*, int level, const char *fmt, ...);
2536 #endif
2537
2538 extern void av_vlog(void*, int level, const char *fmt, va_list);
2539 extern int av_log_get_level(void);
2540 extern void av_log_set_level(int);
2541 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2542
2543 /* endian macros */
2544 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2545 #define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2546 #define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
2547                    (((uint8_t*)(x))[1] << 16) | \
2548                    (((uint8_t*)(x))[2] << 8) | \
2549                     ((uint8_t*)(x))[3])
2550 #define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2551 #define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
2552                    (((uint8_t*)(x))[2] << 16) | \
2553                    (((uint8_t*)(x))[1] << 8) | \
2554                     ((uint8_t*)(x))[0])
2555 #endif
2556
2557 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2558
2559 #ifdef __cplusplus
2560 }
2561 #endif
2562
2563 #endif /* AVCODEC_H */