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 "common.h"
  15
  16 #define FFMPEG_VERSION_INT     0x000408
  17 #define FFMPEG_VERSION         "0.4.8"
  18 #define LIBAVCODEC_BUILD       4681
  19
  20 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
  21 #define LIBAVCODEC_VERSION     FFMPEG_VERSION
  22
  23 #define AV_STRINGIFY(s) AV_TOSTRING(s)
  24 #define AV_TOSTRING(s) #s
  25 #define LIBAVCODEC_IDENT        "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
  26
  27 enum CodecID {
  28     CODEC_ID_NONE,
  29     CODEC_ID_MPEG1VIDEO,
  30     CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
  31     CODEC_ID_MPEG2VIDEO_XVMC,
  32     CODEC_ID_H263,
  33     CODEC_ID_RV10,
  34     CODEC_ID_MP2,
  35     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
  36     CODEC_ID_VORBIS,
  37     CODEC_ID_AC3,
  38     CODEC_ID_MJPEG,
  39     CODEC_ID_MJPEGB,
  40     CODEC_ID_LJPEG,
  41     CODEC_ID_MPEG4,
  42     CODEC_ID_RAWVIDEO,
  43     CODEC_ID_MSMPEG4V1,
  44     CODEC_ID_MSMPEG4V2,
  45     CODEC_ID_MSMPEG4V3,
  46     CODEC_ID_WMV1,
  47     CODEC_ID_WMV2,
  48     CODEC_ID_H263P,
  49     CODEC_ID_H263I,
  50     CODEC_ID_FLV1,
  51     CODEC_ID_SVQ1,
  52     CODEC_ID_SVQ3,
  53     CODEC_ID_DVVIDEO,
  54     CODEC_ID_DVAUDIO,
  55     CODEC_ID_WMAV1,
  56     CODEC_ID_WMAV2,
  57     CODEC_ID_MACE3,
  58     CODEC_ID_MACE6,
  59     CODEC_ID_HUFFYUV,
  60     CODEC_ID_CYUV,
  61     CODEC_ID_H264,
  62     CODEC_ID_INDEO3,
  63     CODEC_ID_VP3,
  64     CODEC_ID_AAC,
  65     CODEC_ID_MPEG4AAC,
  66     CODEC_ID_ASV1,
  67     CODEC_ID_ASV2,
  68     CODEC_ID_FFV1,
  69     CODEC_ID_4XM,
  70     CODEC_ID_VCR1,
  71     CODEC_ID_CLJR,
  72     CODEC_ID_MDEC,
  73     CODEC_ID_ROQ,
  74     CODEC_ID_INTERPLAY_VIDEO,
  75     CODEC_ID_XAN_WC3,
  76     CODEC_ID_XAN_WC4,
  77     CODEC_ID_RPZA,
  78     CODEC_ID_CINEPAK,
  79     CODEC_ID_WS_VQA,
  80     CODEC_ID_MSRLE,
  81     CODEC_ID_MSVIDEO1,
  82
  83     /* various pcm "codecs" */
  84     CODEC_ID_PCM_S16LE,
  85     CODEC_ID_PCM_S16BE,
  86     CODEC_ID_PCM_U16LE,
  87     CODEC_ID_PCM_U16BE,
  88     CODEC_ID_PCM_S8,
  89     CODEC_ID_PCM_U8,
  90     CODEC_ID_PCM_MULAW,
  91     CODEC_ID_PCM_ALAW,
  92
  93     /* various adpcm codecs */
  94     CODEC_ID_ADPCM_IMA_QT,
  95     CODEC_ID_ADPCM_IMA_WAV,
  96     CODEC_ID_ADPCM_IMA_DK3,
  97     CODEC_ID_ADPCM_IMA_DK4,
  98     CODEC_ID_ADPCM_IMA_WS,
  99     CODEC_ID_ADPCM_MS,
 100     CODEC_ID_ADPCM_4XM,
 101
 102         /* AMR */
 103     CODEC_ID_AMR_NB,
 104     CODEC_ID_AMR_WB,
 105
 106     /* RealAudio codecs*/
 107     CODEC_ID_RA_144,
 108     CODEC_ID_RA_288,
 109
 110     /* various DPCM codecs */
 111     CODEC_ID_ROQ_DPCM,
 112     CODEC_ID_INTERPLAY_DPCM,
 113     CODEC_ID_XAN_DPCM,
 114 };
 115
 116 /* CODEC_ID_MP3LAME is absolete */
 117 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 118
 119 enum CodecType {
 120     CODEC_TYPE_UNKNOWN = -1,
 121     CODEC_TYPE_VIDEO,
 122     CODEC_TYPE_AUDIO,
 123 };
 124
 125 /**
 126  * Pixel format. Notes:
 127  *
 128  * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
 129  * color is put together as:
 130  *  (A << 24) | (R << 16) | (G << 8) | B
 131  * This is stored as BGRA on little endian CPU architectures and ARGB on
 132  * big endian CPUs.
 133  *
 134  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
 135  * image data is stored in AVFrame.data[0]. The palette is transported in
 136  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
 137  * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
 138  * also endian-specific).
 139  */
 140 enum PixelFormat {
 141     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
 142     PIX_FMT_YUV422,
 143     PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
 144     PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
 145     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
 146     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
 147     PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
 148     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
 149     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
 150     PIX_FMT_RGB565,    ///< always stored in cpu endianness
 151     PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
 152     PIX_FMT_GRAY8,
 153     PIX_FMT_MONOWHITE, ///< 0 is white
 154     PIX_FMT_MONOBLACK, ///< 0 is black
 155     PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
 156     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
 157     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
 158     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
 159     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
 160     PIX_FMT_XVMC_MPEG2_IDCT,
 161     PIX_FMT_NB,
 162 };
 163
 164 /* currently unused, may be used if 24/32 bits samples ever supported */
 165 enum SampleFormat {
 166     SAMPLE_FMT_S16 = 0,         ///< signed 16 bits
 167 };
 168
 169 /* in bytes */
 170 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
 171
 172 /**
 173  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 174  * this is mainly needed because some optimized bitstream readers read
 175  * 32 or 64 bit at once and could read over the end<br>
 176  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 177  * MPEG bitstreams could cause overread and segfault
 178  */
 179 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 180
 181 /* motion estimation type, EPZS by default */
 182 enum Motion_Est_ID {
 183     ME_ZERO = 1,
 184     ME_FULL,
 185     ME_LOG,
 186     ME_PHODS,
 187     ME_EPZS,
 188     ME_X1
 189 };
 190
 191 typedef struct RcOverride{
 192     int start_frame;
 193     int end_frame;
 194     int qscale; // if this is 0 then quality_factor will be used instead
 195     float quality_factor;
 196 } RcOverride;
 197
 198 /* only for ME compatiblity with old apps */
 199 extern int motion_estimation_method;
 200
 201 /* ME algos sorted by quality */
 202 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
 203                                        ME_X1, ME_EPZS, ME_FULL };
 204
 205
 206 #define FF_MAX_B_FRAMES 8
 207
 208 /* encoding support
 209    these flags can be passed in AVCodecContext.flags before initing
 210    Note: note not everything is supported yet
 211 */
 212
 213 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 214 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed
 215 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 216 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 217 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 218 /* parent program gurantees that the input for b-frame containing streams is not written to
 219    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 220 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 221 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 222 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 223 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 224 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 225 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
 226 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 227 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 228                                             of only at frame boundaries */
 229 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 230 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 231 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 232 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 233 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 234 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 235 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 236 /* Fx : Flag for h263+ extra options */
 237 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< Advanced intra coding
 238 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 239 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 240 /* For advanced prediction mode, we reuse the 4MV flag */
 241 /* Unsupported options :
 242  *              Syntax Arithmetic coding (SAC)
 243  *              Deblocking filter internal loop
 244  *              Slice structured
 245  *              Reference Picture Selection
 246  *              Independant Segment Decoding
 247  *              Alternative Inter *             VLC
 248  *              Modified Quantization */
 249 /* /Fx */
 250 /* codec capabilities */
 251
 252 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 253 /**
 254  * Codec uses get_buffer() for allocating buffers.
 255  * direct rendering method 1
 256  */
 257 #define CODEC_CAP_DR1             0x0002
 258 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 259    used */
 260 #define CODEC_CAP_PARSE_ONLY      0x0004
 261 #define CODEC_CAP_TRUNCATED       0x0008
 262
 263 #define FF_COMMON_FRAME \
 264     /**\
 265      * pointer to the picture planes.\
 266      * this might be different from the first allocated byte\
 267      * - encoding: \
 268      * - decoding: \
 269      */\
 270     uint8_t *data[4];\
 271     int linesize[4];\
 272     /**\
 273      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 274      * this isnt used by lavc unless the default get/release_buffer() is used\
 275      * - encoding: \
 276      * - decoding: \
 277      */\
 278     uint8_t *base[4];\
 279     /**\
 280      * 1 -> keyframe, 0-> not\
 281      * - encoding: set by lavc\
 282      * - decoding: set by lavc\
 283      */\
 284     int key_frame;\
 285 \
 286     /**\
 287      * picture type of the frame, see ?_TYPE below.\
 288      * - encoding: set by lavc for coded_picture (and set by user for input)\
 289      * - decoding: set by lavc\
 290      */\
 291     int pict_type;\
 292 \
 293     /**\
 294      * presentation timestamp in micro seconds (time when frame should be shown to user)\
 295      * if 0 then the frame_rate will be used as reference\
 296      * - encoding: MUST be set by user\
 297      * - decoding: set by lavc\
 298      */\
 299     int64_t pts;\
 300 \
 301     /**\
 302      * picture number in bitstream order.\
 303      * - encoding: set by\
 304      * - decoding: set by lavc\
 305      */\
 306     int coded_picture_number;\
 307     /**\
 308      * picture number in display order.\
 309      * - encoding: set by\
 310      * - decoding: set by lavc\
 311      */\
 312     int display_picture_number;\
 313 \
 314     /**\
 315      * quality (between 1 (good) and 31 (bad)) \
 316      * - encoding: set by lavc for coded_picture (and set by user for input)\
 317      * - decoding: set by lavc\
 318      */\
 319     float quality; \
 320 \
 321     /**\
 322      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 323      * set to something large if the buffer has not been used yet \
 324      * - encoding: unused\
 325      * - decoding: MUST be set by get_buffer()\
 326      */\
 327     int age;\
 328 \
 329     /**\
 330      * is this picture used as reference\
 331      * - encoding: unused\
 332      * - decoding: set by lavc (before get_buffer() call))\
 333      */\
 334     int reference;\
 335 \
 336     /**\
 337      * QP table\
 338      * - encoding: unused\
 339      * - decoding: set by lavc\
 340      */\
 341     int8_t *qscale_table;\
 342     /**\
 343      * QP store stride\
 344      * - encoding: unused\
 345      * - decoding: set by lavc\
 346      */\
 347     int qstride;\
 348 \
 349     /**\
 350      * mbskip_table[mb]>=1 if MB didnt change\
 351      * stride= mb_width = (width+15)>>4\
 352      * - encoding: unused\
 353      * - decoding: set by lavc\
 354      */\
 355     uint8_t *mbskip_table;\
 356 \
 357     /**\
 358      * for some private data of the user\
 359      * - encoding: unused\
 360      * - decoding: set by user\
 361      */\
 362     void *opaque;\
 363 \
 364     /**\
 365      * error\
 366      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 367      * - decoding: unused\
 368      */\
 369     uint64_t error[4];\
 370 \
 371     /**\
 372      * type of the buffer (to keep track of who has to dealloc data[*])\
 373      * - encoding: set by the one who allocs it\
 374      * - decoding: set by the one who allocs it\
 375      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 376      */\
 377     int type;\
 378     \
 379     /**\
 380      * when decoding, this signal how much the picture must be delayed.\
 381      * extra_delay = repeat_pict / (2*fps)\
 382      * - encoding: unused\
 383      * - decoding: set by lavc\
 384      */\
 385     int repeat_pict;\
 386     \
 387     /**\
 388      * \
 389      */\
 390     int qscale_type;\
 391
 392 #define FF_QSCALE_TYPE_MPEG1    0
 393 #define FF_QSCALE_TYPE_MPEG2    1
 394
 395 #define FF_BUFFER_TYPE_INTERNAL 1
 396 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 397 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewher else, dont dealloc image (data/base)
 398 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, dont dealloc anything
 399
 400
 401 #define FF_I_TYPE 1 // Intra
 402 #define FF_P_TYPE 2 // Predicted
 403 #define FF_B_TYPE 3 // Bi-dir predicted
 404 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 405 #define FF_SI_TYPE 5
 406 #define FF_SP_TYPE 6
 407
 408 /**
 409  * Audio Video Frame.
 410  */
 411 typedef struct AVFrame {
 412     FF_COMMON_FRAME
 413 } AVFrame;
 414
 415 #define DEFAULT_FRAME_RATE_BASE 1001000
 416
 417 /**
 418  * main external api structure.
 419  */
 420 typedef struct AVCodecContext {
 421     /**
 422      * the average bitrate.
 423      * - encoding: set by user. unused for constant quantizer encoding
 424      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 425      */
 426     int bit_rate;
 427
 428     /**
 429      * number of bits the bitstream is allowed to diverge from the reference.
 430      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 431      * - encoding: set by user. unused for constant quantizer encoding
 432      * - decoding: unused
 433      */
 434     int bit_rate_tolerance;
 435
 436     /**
 437      * CODEC_FLAG_*.
 438      * - encoding: set by user.
 439      * - decoding: set by user.
 440      */
 441     int flags;
 442
 443     /**
 444      * some codecs needs additionnal format info. It is stored here
 445      * - encoding: set by user.
 446      * - decoding: set by lavc. (FIXME is this ok?)
 447      */
 448     int sub_id;
 449
 450     /**
 451      * motion estimation algorithm used for video coding.
 452      * - encoding: MUST be set by user.
 453      * - decoding: unused
 454      */
 455     int me_method;
 456
 457     /**
 458      * some codecs need / can use extra-data like huffman tables.
 459      * mjpeg: huffman tables
 460      * rv10: additional flags
 461      * mpeg4: global headers (they can be in the bitstream or here)
 462      * - encoding: set/allocated/freed by lavc.
 463      * - decoding: set/allocated/freed by user.
 464      */
 465     void *extradata;
 466     int extradata_size;
 467
 468     /* video only */
 469     /**
 470      * frames per sec multiplied by frame_rate_base.
 471      * for variable fps this is the precission, so if the timestamps
 472      * can be specified in msec precssion then this is 1000*frame_rate_base
 473      * - encoding: MUST be set by user
 474      * - decoding: set by lavc. 0 or the frame_rate if available
 475      */
 476     int frame_rate;
 477
 478     /**
 479      * width / height.
 480      * - encoding: MUST be set by user.
 481      * - decoding: set by user, some codecs might override / change it during playback
 482      */
 483     int width, height;
 484
 485 #define FF_ASPECT_SQUARE 1
 486 #define FF_ASPECT_4_3_625 2
 487 #define FF_ASPECT_4_3_525 3
 488 #define FF_ASPECT_16_9_625 4
 489 #define FF_ASPECT_16_9_525 5
 490 #define FF_ASPECT_EXTENDED 15
 491
 492     /**
 493      * the number of pictures in a group of pitures, or 0 for intra_only.
 494      * - encoding: set by user.
 495      * - decoding: unused
 496      */
 497     int gop_size;
 498
 499     /**
 500      * pixel format, see PIX_FMT_xxx.
 501      * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
 502      *                    conversion is in order. This only works for
 503      *                    codecs with one supported pix_fmt, we should
 504      *                    do something for a generic case as well.
 505      * - decoding: set by lavc.
 506      */
 507     enum PixelFormat pix_fmt;
 508
 509     /**
 510      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 511      * has to read frames at native frame rate.
 512      * - encoding: set by user.
 513      * - decoding: unused.
 514      */
 515     int rate_emu;
 516
 517     /**
 518      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 519      * decoder to draw an horizontal band. It improve cache usage. Not
 520      * all codecs can do that. You must check the codec capabilities
 521      * before
 522      * - encoding: unused
 523      * - decoding: set by user.
 524      * @param height the height of the slice
 525      * @param y the y position of the slice
 526      * @param type 1->top field, 2->bottom field, 3->frame
 527      * @param offset offset into the AVFrame.data from which the slice should be read
 528      */
 529     void (*draw_horiz_band)(struct AVCodecContext *s,
 530                             const AVFrame *src, int offset[4],
 531                             int y, int type, int height);
 532
 533     /* audio only */
 534     int sample_rate; ///< samples per sec
 535     int channels;
 536     int sample_fmt;  ///< sample format, currenly unused
 537
 538     /* the following data should not be initialized */
 539     int frame_size;     ///< in samples, initialized when calling 'init'
 540     int frame_number;   ///< audio or video frame number
 541     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 542
 543     /**
 544      * number of frames the decoded output will be delayed relative to
 545      * the encoded input.
 546      * - encoding: set by lavc.
 547      * - decoding: unused
 548      */
 549     int delay;
 550
 551     /* - encoding parameters */
 552     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 553     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 554
 555     /**
 556      * minimum quantizer.
 557      * - encoding: set by user.
 558      * - decoding: unused
 559      */
 560     int qmin;
 561
 562     /**
 563      * maximum quantizer.
 564      * - encoding: set by user.
 565      * - decoding: unused
 566      */
 567     int qmax;
 568
 569     /**
 570      * maximum quantizer difference etween frames.
 571      * - encoding: set by user.
 572      * - decoding: unused
 573      */
 574     int max_qdiff;
 575
 576     /**
 577      * maximum number of b frames between non b frames.
 578      * note: the output will be delayed by max_b_frames+1 relative to the input
 579      * - encoding: set by user.
 580      * - decoding: unused
 581      */
 582     int max_b_frames;
 583
 584     /**
 585      * qscale factor between ip and b frames.
 586      * - encoding: set by user.
 587      * - decoding: unused
 588      */
 589     float b_quant_factor;
 590
 591     /** obsolete FIXME remove */
 592     int rc_strategy;
 593     int b_frame_strategy;
 594
 595     /**
 596      * hurry up amount.
 597      * - encoding: unused
 598      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 599      */
 600     int hurry_up;
 601
 602     struct AVCodec *codec;
 603
 604     void *priv_data;
 605
 606     /* The following data is for RTP friendly coding */
 607     /* By now only H.263/H.263+/MPEG4 coder honours this   */
 608     int rtp_mode;   /* 1 for activate RTP friendly-mode           */
 609                     /* highers numbers represent more error-prone */
 610                     /* enviroments, by now just "1" exist         */
 611
 612     int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
 613                             /* do it's best to deliver a chunk with size    */
 614                             /* below rtp_payload_size, the chunk will start */
 615                             /* with a start code on some codecs like H.263  */
 616                             /* This doesn't take account of any particular  */
 617                             /* headers inside the transmited RTP payload    */
 618
 619
 620     /* The RTP callcack: This function is called  */
 621     /* every time the encoder as a packet to send */
 622     /* Depends on the encoder if the data starts  */
 623     /* with a Start Code (it should) H.263 does   */
 624     void (*rtp_callback)(void *data, int size, int packet_number);
 625
 626     /* statistics, used for 2-pass encoding */
 627     int mv_bits;
 628     int header_bits;
 629     int i_tex_bits;
 630     int p_tex_bits;
 631     int i_count;
 632     int p_count;
 633     int skip_count;
 634     int misc_bits;
 635
 636     /**
 637      * number of bits used for the previously encoded frame.
 638      * - encoding: set by lavc
 639      * - decoding: unused
 640      */
 641     int frame_bits;
 642
 643     /**
 644      * private data of the user, can be used to carry app specific stuff.
 645      * - encoding: set by user
 646      * - decoding: set by user
 647      */
 648     void *opaque;
 649
 650     char codec_name[32];
 651     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 652     enum CodecID codec_id; /* see CODEC_ID_xxx */
 653
 654     /**
 655      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 656      * this is used to workaround some encoder bugs
 657      * - encoding: set by user, if not then the default based on codec_id will be used
 658      * - decoding: set by user, will be converted to upper case by lavc during init
 659      */
 660     unsigned int codec_tag;
 661
 662     /**
 663      * workaround bugs in encoders which sometimes cannot be detected automatically.
 664      * - encoding: unused
 665      * - decoding: set by user
 666      */
 667     int workaround_bugs;
 668 #define FF_BUG_AUTODETECT       1  ///< autodetection
 669 #define FF_BUG_OLD_MSMPEG4      2
 670 #define FF_BUG_XVID_ILACE       4
 671 #define FF_BUG_UMP4             8
 672 #define FF_BUG_NO_PADDING       16
 673 #define FF_BUG_AC_VLC           32
 674 #define FF_BUG_QPEL_CHROMA      64
 675 #define FF_BUG_STD_QPEL         128
 676 #define FF_BUG_QPEL_CHROMA2     256
 677 #define FF_BUG_DIRECT_BLOCKSIZE 512
 678 #define FF_BUG_EDGE             1024
 679 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
 680
 681     /**
 682      * luma single coeff elimination threshold.
 683      * - encoding: set by user
 684      * - decoding: unused
 685      */
 686     int luma_elim_threshold;
 687
 688     /**
 689      * chroma single coeff elimination threshold.
 690      * - encoding: set by user
 691      * - decoding: unused
 692      */
 693     int chroma_elim_threshold;
 694
 695     /**
 696      * strictly follow the std (MPEG4, ...).
 697      * - encoding: set by user
 698      * - decoding: unused
 699      */
 700     int strict_std_compliance;
 701
 702     /**
 703      * qscale offset between ip and b frames.
 704      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 705      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 706      * - encoding: set by user.
 707      * - decoding: unused
 708      */
 709     float b_quant_offset;
 710
 711     /**
 712      * error resilience higher values will detect more errors but may missdetect
 713      * some more or less valid parts as errors.
 714      * - encoding: unused
 715      * - decoding: set by user
 716      */
 717     int error_resilience;
 718 #define FF_ER_CAREFULL        1
 719 #define FF_ER_COMPLIANT       2
 720 #define FF_ER_AGGRESSIVE      3
 721 #define FF_ER_VERY_AGGRESSIVE 4
 722
 723     /**
 724      * called at the beginning of each frame to get a buffer for it.
 725      * if pic.reference is set then the frame will be read later by lavc
 726      * width and height should be rounded up to the next multiple of 16
 727      * - encoding: unused
 728      * - decoding: set by lavc, user can override
 729      */
 730     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
 731
 732     /**
 733      * called to release buffers which where allocated with get_buffer.
 734      * a released buffer can be reused in get_buffer()
 735      * pic.data[*] must be set to NULL
 736      * - encoding: unused
 737      * - decoding: set by lavc, user can override
 738      */
 739     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
 740
 741     /**
 742      * is 1 if the decoded stream contains b frames, 0 otherwise.
 743      * - encoding: unused
 744      * - decoding: set by lavc
 745      */
 746     int has_b_frames;
 747
 748     int block_align; ///< used by some WAV based audio codecs
 749
 750     int parse_only; /* - decoding only: if true, only parsing is done
 751                        (function avcodec_parse_frame()). The frame
 752                        data is returned. Only MPEG codecs support this now. */
 753
 754     /**
 755      * 0-> h263 quant 1-> mpeg quant.
 756      * - encoding: set by user.
 757      * - decoding: unused
 758      */
 759     int mpeg_quant;
 760
 761     /**
 762      * pass1 encoding statistics output buffer.
 763      * - encoding: set by lavc
 764      * - decoding: unused
 765      */
 766     char *stats_out;
 767
 768     /**
 769      * pass2 encoding statistics input buffer.
 770      * concatenated stuff from stats_out of pass1 should be placed here
 771      * - encoding: allocated/set/freed by user
 772      * - decoding: unused
 773      */
 774     char *stats_in;
 775
 776     /**
 777      * ratecontrol qmin qmax limiting method.
 778      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
 779      * - encoding: set by user.
 780      * - decoding: unused
 781      */
 782     float rc_qsquish;
 783
 784     float rc_qmod_amp;
 785     int rc_qmod_freq;
 786
 787     /**
 788      * ratecontrol override, see RcOverride.
 789      * - encoding: allocated/set/freed by user.
 790      * - decoding: unused
 791      */
 792     RcOverride *rc_override;
 793     int rc_override_count;
 794
 795     /**
 796      * rate control equation.
 797      * - encoding: set by user
 798      * - decoding: unused
 799      */
 800     char *rc_eq;
 801
 802     /**
 803      * maximum bitrate.
 804      * - encoding: set by user.
 805      * - decoding: unused
 806      */
 807     int rc_max_rate;
 808
 809     /**
 810      * minimum bitrate.
 811      * - encoding: set by user.
 812      * - decoding: unused
 813      */
 814     int rc_min_rate;
 815
 816     /**
 817      * decoder bitstream buffer size.
 818      * - encoding: set by user.
 819      * - decoding: unused
 820      */
 821     int rc_buffer_size;
 822     float rc_buffer_aggressivity;
 823
 824     /**
 825      * qscale factor between p and i frames.
 826      * - encoding: set by user.
 827      * - decoding: unused
 828      */
 829     float i_quant_factor;
 830
 831     /**
 832      * qscale offset between p and i frames.
 833      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 834      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 835      * - encoding: set by user.
 836      * - decoding: unused
 837      */
 838     float i_quant_offset;
 839
 840     /**
 841      * initial complexity for pass1 ratecontrol.
 842      * - encoding: set by user.
 843      * - decoding: unused
 844      */
 845     float rc_initial_cplx;
 846
 847     /**
 848      * dct algorithm, see FF_DCT_* below.
 849      * - encoding: set by user
 850      * - decoding: unused
 851      */
 852     int dct_algo;
 853 #define FF_DCT_AUTO    0
 854 #define FF_DCT_FASTINT 1
 855 #define FF_DCT_INT     2
 856 #define FF_DCT_MMX     3
 857 #define FF_DCT_MLIB    4
 858 #define FF_DCT_ALTIVEC 5
 859
 860     /**
 861      * luminance masking (0-> disabled).
 862      * - encoding: set by user
 863      * - decoding: unused
 864      */
 865     float lumi_masking;
 866
 867     /**
 868      * temporary complexity masking (0-> disabled).
 869      * - encoding: set by user
 870      * - decoding: unused
 871      */
 872     float temporal_cplx_masking;
 873
 874     /**
 875      * spatial complexity masking (0-> disabled).
 876      * - encoding: set by user
 877      * - decoding: unused
 878      */
 879     float spatial_cplx_masking;
 880
 881     /**
 882      * p block masking (0-> disabled).
 883      * - encoding: set by user
 884      * - decoding: unused
 885      */
 886     float p_masking;
 887
 888     /**
 889      * darkness masking (0-> disabled).
 890      * - encoding: set by user
 891      * - decoding: unused
 892      */
 893     float dark_masking;
 894
 895
 896     /* for binary compatibility */
 897     int unused;
 898
 899     /**
 900      * idct algorithm, see FF_IDCT_* below.
 901      * - encoding: set by user
 902      * - decoding: set by user
 903      */
 904     int idct_algo;
 905 #define FF_IDCT_AUTO         0
 906 #define FF_IDCT_INT          1
 907 #define FF_IDCT_SIMPLE       2
 908 #define FF_IDCT_SIMPLEMMX    3
 909 #define FF_IDCT_LIBMPEG2MMX  4
 910 #define FF_IDCT_PS2          5
 911 #define FF_IDCT_MLIB         6
 912 #define FF_IDCT_ARM          7
 913 #define FF_IDCT_ALTIVEC      8
 914 #define FF_IDCT_SH4          9
 915 #define FF_IDCT_SIMPLEARM    10
 916
 917     /**
 918      * slice count.
 919      * - encoding: set by lavc
 920      * - decoding: set by user (or 0)
 921      */
 922     int slice_count;
 923     /**
 924      * slice offsets in the frame in bytes.
 925      * - encoding: set/allocated by lavc
 926      * - decoding: set/allocated by user (or NULL)
 927      */
 928     int *slice_offset;
 929
 930     /**
 931      * error concealment flags.
 932      * - encoding: unused
 933      * - decoding: set by user
 934      */
 935     int error_concealment;
 936 #define FF_EC_GUESS_MVS   1
 937 #define FF_EC_DEBLOCK     2
 938
 939     /**
 940      * dsp_mask could be add used to disable unwanted CPU features
 941      * CPU features (i.e. MMX, SSE. ...)
 942      *
 943      * with FORCE flag you may instead enable given CPU features
 944      * (Dangerous: usable in case of misdetection, improper usage however will
 945      * result into program crash)
 946      */
 947     unsigned dsp_mask;
 948 #define FF_MM_FORCE     0x80000000 /* force usage of selected flags (OR) */
 949     /* lower 16 bits - CPU features */
 950 #ifdef HAVE_MMX
 951 #define FF_MM_MMX       0x0001 /* standard MMX */
 952 #define FF_MM_3DNOW     0x0004 /* AMD 3DNOW */
 953 #define FF_MM_MMXEXT    0x0002 /* SSE integer functions or AMD MMX ext */
 954 #define FF_MM_SSE       0x0008 /* SSE functions */
 955 #define FF_MM_SSE2      0x0010 /* PIV SSE2 functions */
 956 #endif /* HAVE_MMX */
 957
 958     /**
 959      * bits per sample/pixel from the demuxer (needed for huffyuv).
 960      * - encoding: set by lavc
 961      * - decoding: set by user
 962      */
 963      int bits_per_sample;
 964
 965     /**
 966      * prediction method (needed for huffyuv).
 967      * - encoding: set by user
 968      * - decoding: unused
 969      */
 970      int prediction_method;
 971 #define FF_PRED_LEFT   0
 972 #define FF_PRED_PLANE  1
 973 #define FF_PRED_MEDIAN 2
 974
 975     /**
 976      * aspect ratio (0 if unknown).
 977      * - encoding: set by user.
 978      * - decoding: set by lavc.
 979      */
 980     float aspect_ratio;
 981
 982     /**
 983      * the picture in the bitstream.
 984      * - encoding: set by lavc
 985      * - decoding: set by lavc
 986      */
 987     AVFrame *coded_frame;
 988
 989     /**
 990      * debug.
 991      * - encoding: set by user.
 992      * - decoding: set by user.
 993      */
 994     int debug;
 995 #define FF_DEBUG_PICT_INFO 1
 996 #define FF_DEBUG_RC        2
 997 #define FF_DEBUG_BITSTREAM 4
 998 #define FF_DEBUG_MB_TYPE   8
 999 #define FF_DEBUG_QP        16
1000 #define FF_DEBUG_MV        32
1001 #define FF_DEBUG_VIS_MV    0x00000040
1002 #define FF_DEBUG_SKIP      0x00000080
1003 #define FF_DEBUG_STARTCODE 0x00000100
1004 #define FF_DEBUG_PTS       0x00000200
1005 #define FF_DEBUG_ER        0x00000400
1006 #define FF_DEBUG_MMCO      0x00000800
1007 #define FF_DEBUG_BUGS      0x00001000
1008
1009     /**
1010      * error.
1011      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1012      * - decoding: unused
1013      */
1014     uint64_t error[4];
1015
1016     /**
1017      * minimum MB quantizer.
1018      * - encoding: set by user.
1019      * - decoding: unused
1020      */
1021     int mb_qmin;
1022
1023     /**
1024      * maximum MB quantizer.
1025      * - encoding: set by user.
1026      * - decoding: unused
1027      */
1028     int mb_qmax;
1029
1030     /**
1031      * motion estimation compare function.
1032      * - encoding: set by user.
1033      * - decoding: unused
1034      */
1035     int me_cmp;
1036     /**
1037      * subpixel motion estimation compare function.
1038      * - encoding: set by user.
1039      * - decoding: unused
1040      */
1041     int me_sub_cmp;
1042     /**
1043      * macroblock compare function (not supported yet).
1044      * - encoding: set by user.
1045      * - decoding: unused
1046      */
1047     int mb_cmp;
1048 #define FF_CMP_SAD  0
1049 #define FF_CMP_SSE  1
1050 #define FF_CMP_SATD 2
1051 #define FF_CMP_DCT  3
1052 #define FF_CMP_PSNR 4
1053 #define FF_CMP_BIT  5
1054 #define FF_CMP_RD   6
1055 #define FF_CMP_ZERO 7
1056 #define FF_CMP_CHROMA 256
1057
1058     /**
1059      * ME diamond size & shape.
1060      * - encoding: set by user.
1061      * - decoding: unused
1062      */
1063     int dia_size;
1064
1065     /**
1066      * amount of previous MV predictors (2a+1 x 2a+1 square).
1067      * - encoding: set by user.
1068      * - decoding: unused
1069      */
1070     int last_predictor_count;
1071
1072     /**
1073      * pre pass for motion estimation.
1074      * - encoding: set by user.
1075      * - decoding: unused
1076      */
1077     int pre_me;
1078
1079     /**
1080      * motion estimation pre pass compare function.
1081      * - encoding: set by user.
1082      * - decoding: unused
1083      */
1084     int me_pre_cmp;
1085
1086     /**
1087      * ME pre pass diamond size & shape.
1088      * - encoding: set by user.
1089      * - decoding: unused
1090      */
1091     int pre_dia_size;
1092
1093     /**
1094      * subpel ME quality.
1095      * - encoding: set by user.
1096      * - decoding: unused
1097      */
1098     int me_subpel_quality;
1099
1100     /**
1101      * callback to negotiate the pixelFormat.
1102      * @param fmt is the list of formats which are supported by the codec,
1103      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1104      * the first is allways the native one
1105      * @return the choosen format
1106      * - encoding: unused
1107      * - decoding: set by user, if not set then the native format will always be choosen
1108      */
1109     enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1110
1111     /**
1112      * DTG active format information (additionnal aspect ratio
1113      * information only used in DVB MPEG2 transport streams). 0 if
1114      * not set.
1115      *
1116      * - encoding: unused.
1117      * - decoding: set by decoder
1118      */
1119     int dtg_active_format;
1120 #define FF_DTG_AFD_SAME         8
1121 #define FF_DTG_AFD_4_3          9
1122 #define FF_DTG_AFD_16_9         10
1123 #define FF_DTG_AFD_14_9         11
1124 #define FF_DTG_AFD_4_3_SP_14_9  13
1125 #define FF_DTG_AFD_16_9_SP_14_9 14
1126 #define FF_DTG_AFD_SP_4_3       15
1127
1128     /**
1129      * Maximum motion estimation search range in subpel units.
1130      * if 0 then no limit
1131      *
1132      * - encoding: set by user.
1133      * - decoding: unused.
1134      */
1135     int me_range;
1136
1137     /**
1138      * frame_rate_base.
1139      * for variable fps this is 1
1140      * - encoding: set by user.
1141      * - decoding: set by lavc.
1142      * @todo move this after frame_rate
1143      */
1144
1145     int frame_rate_base;
1146     /**
1147      * intra quantizer bias.
1148      * - encoding: set by user.
1149      * - decoding: unused
1150      */
1151     int intra_quant_bias;
1152 #define FF_DEFAULT_QUANT_BIAS 999999
1153
1154     /**
1155      * inter quantizer bias.
1156      * - encoding: set by user.
1157      * - decoding: unused
1158      */
1159     int inter_quant_bias;
1160
1161     /**
1162      * color table ID.
1163      * - encoding: unused.
1164      * - decoding: which clrtable should be used for 8bit RGB images
1165      *             table have to be stored somewhere FIXME
1166      */
1167     int color_table_id;
1168
1169     /**
1170      * internal_buffer count.
1171      * Dont touch, used by lavc default_get_buffer()
1172      */
1173     int internal_buffer_count;
1174
1175     /**
1176      * internal_buffers.
1177      * Dont touch, used by lavc default_get_buffer()
1178      */
1179     void *internal_buffer;
1180
1181 #define FF_QUALITY_SCALE 256
1182     /**
1183      * global quality for codecs which cannot change it per frame.
1184      * this should be proportional to MPEG1/2/4 qscale.
1185      * - encoding: set by user.
1186      * - decoding: unused
1187      */
1188     int global_quality;
1189
1190 #define FF_CODER_TYPE_VLC   0
1191 #define FF_CODER_TYPE_AC    1
1192     /**
1193      * coder type
1194      * - encoding: set by user.
1195      * - decoding: unused
1196      */
1197     int coder_type;
1198
1199     /**
1200      * context model
1201      * - encoding: set by user.
1202      * - decoding: unused
1203      */
1204     int context_model;
1205
1206     /**
1207      * slice flags
1208      * - encoding: unused
1209      * - decoding: set by user.
1210      */
1211     int slice_flags;
1212 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1213 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1214 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1215
1216     /**
1217      * XVideo Motion Acceleration
1218      * - encoding: forbidden
1219      * - decoding: set by decoder
1220      */
1221     int xvmc_acceleration;
1222
1223     /**
1224      * macroblock decision mode
1225      * - encoding: set by user.
1226      * - decoding: unused
1227      */
1228     int mb_decision;
1229 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1230 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1231 #define FF_MB_DECISION_RD     2        ///< rate distoration
1232
1233     /**
1234      * custom intra quantization matrix
1235      * - encoding: set by user, can be NULL
1236      * - decoding: set by lavc
1237      */
1238     uint16_t *intra_matrix;
1239
1240     /**
1241      * custom inter quantization matrix
1242      * - encoding: set by user, can be NULL
1243      * - decoding: set by lavc
1244      */
1245     uint16_t *inter_matrix;
1246
1247     /**
1248      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1249      * this is used to workaround some encoder bugs
1250      * - encoding: unused
1251      * - decoding: set by user, will be converted to upper case by lavc during init
1252      */
1253     unsigned int stream_codec_tag;
1254
1255     /**
1256      * scene change detection threshold.
1257      * 0 is default, larger means fewer detected scene changes
1258      * - encoding: set by user.
1259      * - decoding: unused
1260      */
1261     int scenechange_threshold;
1262 } AVCodecContext;
1263
1264
1265 /**
1266  * AVOption.
1267  */
1268 typedef struct AVOption {
1269     /** options' name */
1270     const char *name; /* if name is NULL, it indicates a link to next */
1271     /** short English text help or const struct AVOption* subpointer */
1272     const char *help; //        const struct AVOption* sub;
1273     /** offset to context structure where the parsed value should be stored */
1274     int offset;
1275     /** options' type */
1276     int type;
1277 #define FF_OPT_TYPE_BOOL 1      ///< boolean - true,1,on  (or simply presence)
1278 #define FF_OPT_TYPE_DOUBLE 2    ///< double
1279 #define FF_OPT_TYPE_INT 3       ///< integer
1280 #define FF_OPT_TYPE_STRING 4    ///< string (finished with \0)
1281 #define FF_OPT_TYPE_MASK 0x1f   ///< mask for types - upper bits are various flags
1282 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1283 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1284 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1285     /** min value  (min == max   ->  no limits) */
1286     double min;
1287     /** maximum value for double/int */
1288     double max;
1289     /** default boo [0,1]l/double/int value */
1290     double defval;
1291     /**
1292      * default string value (with optional semicolon delimited extra option-list
1293      * i.e.   option1;option2;option3
1294      * defval might select other then first argument as default
1295      */
1296     const char *defstr;
1297 #define FF_OPT_MAX_DEPTH 10
1298 } AVOption;
1299
1300 /**
1301  * Parse option(s) and sets fields in passed structure
1302  * @param strct structure where the parsed results will be written
1303  * @param list  list with AVOptions
1304  * @param opts  string with options for parsing
1305  */
1306 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1307
1308
1309 /**
1310  * AVCodec.
1311  */
1312 typedef struct AVCodec {
1313     const char *name;
1314     enum CodecType type;
1315     int id;
1316     int priv_data_size;
1317     int (*init)(AVCodecContext *);
1318     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1319     int (*close)(AVCodecContext *);
1320     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1321                   uint8_t *buf, int buf_size);
1322     int capabilities;
1323     const AVOption *options;
1324     struct AVCodec *next;
1325     void (*flush)(AVCodecContext *);
1326 } AVCodec;
1327
1328 /**
1329  * four components are given, that's all.
1330  * the last component is alpha
1331  */
1332 typedef struct AVPicture {
1333     uint8_t *data[4];
1334     int linesize[4];       ///< number of bytes per line
1335 } AVPicture;
1336
1337 /**
1338  * AVPaletteControl
1339  * This structure defines a method for communicating palette changes
1340  * between and demuxer and a decoder.
1341  */
1342 typedef struct AVPaletteControl {
1343
1344     /* demuxer sets this to 1 to indicate the palette has changed;
1345      * decoder resets to 0 */
1346     int palette_changed;
1347
1348     /* 256 3-byte RGB palette entries; the components should be
1349      * formatted in the buffer as "RGBRGB..." and should be scaled to
1350      * 8 bits if they originally represented 6-bit VGA palette
1351      * components */
1352     unsigned char palette[256 * 3];
1353
1354 } AVPaletteControl;
1355
1356 extern AVCodec ac3_encoder;
1357 extern AVCodec mp2_encoder;
1358 extern AVCodec mp3lame_encoder;
1359 extern AVCodec oggvorbis_encoder;
1360 extern AVCodec mpeg1video_encoder;
1361 extern AVCodec mpeg2video_encoder;
1362 extern AVCodec h263_encoder;
1363 extern AVCodec h263p_encoder;
1364 extern AVCodec flv_encoder;
1365 extern AVCodec rv10_encoder;
1366 extern AVCodec mjpeg_encoder;
1367 extern AVCodec ljpeg_encoder;
1368 extern AVCodec mpeg4_encoder;
1369 extern AVCodec msmpeg4v1_encoder;
1370 extern AVCodec msmpeg4v2_encoder;
1371 extern AVCodec msmpeg4v3_encoder;
1372 extern AVCodec wmv1_encoder;
1373 extern AVCodec wmv2_encoder;
1374 extern AVCodec huffyuv_encoder;
1375 extern AVCodec h264_encoder;
1376 extern AVCodec asv1_encoder;
1377 extern AVCodec asv2_encoder;
1378 extern AVCodec vcr1_encoder;
1379 extern AVCodec ffv1_encoder;
1380 extern AVCodec mdec_encoder;
1381
1382 extern AVCodec h263_decoder;
1383 extern AVCodec mpeg4_decoder;
1384 extern AVCodec msmpeg4v1_decoder;
1385 extern AVCodec msmpeg4v2_decoder;
1386 extern AVCodec msmpeg4v3_decoder;
1387 extern AVCodec wmv1_decoder;
1388 extern AVCodec wmv2_decoder;
1389 extern AVCodec mpeg1video_decoder;
1390 extern AVCodec mpeg2video_decoder;
1391 extern AVCodec mpeg_xvmc_decoder;
1392 extern AVCodec h263i_decoder;
1393 extern AVCodec flv_decoder;
1394 extern AVCodec rv10_decoder;
1395 extern AVCodec svq1_decoder;
1396 extern AVCodec svq3_decoder;
1397 extern AVCodec dvvideo_decoder;
1398 extern AVCodec wmav1_decoder;
1399 extern AVCodec wmav2_decoder;
1400 extern AVCodec mjpeg_decoder;
1401 extern AVCodec mjpegb_decoder;
1402 extern AVCodec mp2_decoder;
1403 extern AVCodec mp3_decoder;
1404 extern AVCodec mace3_decoder;
1405 extern AVCodec mace6_decoder;
1406 extern AVCodec huffyuv_decoder;
1407 extern AVCodec oggvorbis_decoder;
1408 extern AVCodec cyuv_decoder;
1409 extern AVCodec h264_decoder;
1410 extern AVCodec indeo3_decoder;
1411 extern AVCodec vp3_decoder;
1412 extern AVCodec amr_nb_decoder;
1413 extern AVCodec amr_nb_encoder;
1414 extern AVCodec amr_wb_encoder;
1415 extern AVCodec amr_wb_decoder;
1416 extern AVCodec aac_decoder;
1417 extern AVCodec mpeg4aac_decoder;
1418 extern AVCodec asv1_decoder;
1419 extern AVCodec asv2_decoder;
1420 extern AVCodec vcr1_decoder;
1421 extern AVCodec cljr_decoder;
1422 extern AVCodec ffv1_decoder;
1423 extern AVCodec fourxm_decoder;
1424 extern AVCodec mdec_decoder;
1425 extern AVCodec roq_decoder;
1426 extern AVCodec interplay_video_decoder;
1427 extern AVCodec xan_wc3_decoder;
1428 extern AVCodec rpza_decoder;
1429 extern AVCodec cinepak_decoder;
1430 extern AVCodec msrle_decoder;
1431 extern AVCodec msvideo1_decoder;
1432 extern AVCodec ra_144_decoder;
1433 extern AVCodec ra_288_decoder;
1434 extern AVCodec roq_dpcm_decoder;
1435 extern AVCodec interplay_dpcm_decoder;
1436 extern AVCodec xan_dpcm_decoder;
1437
1438 /* pcm codecs */
1439 #define PCM_CODEC(id, name) \
1440 extern AVCodec name ## _decoder; \
1441 extern AVCodec name ## _encoder
1442
1443 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1444 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1445 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1446 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1447 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1448 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1449 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1450 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1451
1452 /* adpcm codecs */
1453
1454 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1455 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1456 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1457 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1458 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1459 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1460 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1461
1462 #undef PCM_CODEC
1463
1464 /* dummy raw video codec */
1465 extern AVCodec rawvideo_encoder;
1466 extern AVCodec rawvideo_decoder;
1467
1468 /* the following codecs use external GPL libs */
1469 extern AVCodec ac3_decoder;
1470
1471 /* resample.c */
1472
1473 struct ReSampleContext;
1474
1475 typedef struct ReSampleContext ReSampleContext;
1476
1477 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1478                                      int output_rate, int input_rate);
1479 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1480 void audio_resample_close(ReSampleContext *s);
1481
1482 /* YUV420 format is assumed ! */
1483
1484 struct ImgReSampleContext;
1485
1486 typedef struct ImgReSampleContext ImgReSampleContext;
1487
1488 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1489                                       int input_width, int input_height);
1490
1491 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1492                                       int iwidth, int iheight,
1493                                       int topBand, int bottomBand,
1494                                       int leftBand, int rightBand);
1495
1496 void img_resample(ImgReSampleContext *s,
1497                   AVPicture *output, const AVPicture *input);
1498
1499 void img_resample_close(ImgReSampleContext *s);
1500
1501 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1502                    int pix_fmt, int width, int height);
1503 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1504                      unsigned char *dest, int dest_size);
1505 int avpicture_get_size(int pix_fmt, int width, int height);
1506 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1507 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1508 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1509
1510 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
1511 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
1512 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
1513 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
1514 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
1515 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1516
1517 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1518                              int has_alpha);
1519 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1520                               int has_alpha, int *loss_ptr);
1521
1522 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
1523 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
1524 int img_get_alpha_info(const AVPicture *src,
1525                        int pix_fmt, int width, int height);
1526
1527 /* convert among pixel formats */
1528 int img_convert(AVPicture *dst, int dst_pix_fmt,
1529                 const AVPicture *src, int pix_fmt,
1530                 int width, int height);
1531
1532 /* deinterlace a picture */
1533 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1534                           int pix_fmt, int width, int height);
1535
1536 /* external high level API */
1537
1538 extern AVCodec *first_avcodec;
1539
1540 /* returns LIBAVCODEC_VERSION_INT constant */
1541 unsigned avcodec_version(void);
1542 /* returns LIBAVCODEC_BUILD constant */
1543 unsigned avcodec_build(void);
1544 void avcodec_init(void);
1545
1546 void register_avcodec(AVCodec *format);
1547 AVCodec *avcodec_find_encoder(enum CodecID id);
1548 AVCodec *avcodec_find_encoder_by_name(const char *name);
1549 AVCodec *avcodec_find_decoder(enum CodecID id);
1550 AVCodec *avcodec_find_decoder_by_name(const char *name);
1551 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1552
1553 void avcodec_get_context_defaults(AVCodecContext *s);
1554 AVCodecContext *avcodec_alloc_context(void);
1555 AVFrame *avcodec_alloc_frame(void);
1556
1557 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1558 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1559 void avcodec_default_free_buffers(AVCodecContext *s);
1560
1561 /**
1562  * opens / inits the AVCodecContext.
1563  * not thread save!
1564  */
1565 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1566
1567 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1568                          int *frame_size_ptr,
1569                          uint8_t *buf, int buf_size);
1570 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1571                          int *got_picture_ptr,
1572                          uint8_t *buf, int buf_size);
1573 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1574                         int *data_size_ptr,
1575                         uint8_t *buf, int buf_size);
1576 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1577                          const short *samples);
1578 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1579                          const AVFrame *pict);
1580
1581 int avcodec_close(AVCodecContext *avctx);
1582
1583 void avcodec_register_all(void);
1584
1585 void avcodec_flush_buffers(AVCodecContext *avctx);
1586
1587 /* misc usefull functions */
1588
1589 /**
1590  * returns a single letter to describe the picture type
1591  */
1592 char av_get_pict_type_char(int pict_type);
1593
1594 /**
1595  * reduce a fraction.
1596  * this is usefull for framerate calculations
1597  * @param max the maximum allowed for dst_nom & dst_den
1598  * @return 1 if exact, 0 otherwise
1599  */
1600 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1601
1602 /**
1603  * rescale a 64bit integer.
1604  * a simple a*b/c isnt possible as it can overflow
1605  */
1606 int64_t av_rescale(int64_t a, int b, int c);
1607
1608
1609 /**
1610  * Interface for 0.5.0 version
1611  *
1612  * do not even think about it's usage for this moment
1613  */
1614
1615 typedef struct {
1616     /// compressed size used from given memory buffer
1617     int size;
1618     /// I/P/B frame type
1619     int frame_type;
1620 } avc_enc_result_t;
1621
1622 /**
1623  * Commands
1624  * order can't be changed - once it was defined
1625  */
1626 typedef enum {
1627     // general commands
1628     AVC_OPEN_BY_NAME = 0xACA000,
1629     AVC_OPEN_BY_CODEC_ID,
1630     AVC_OPEN_BY_FOURCC,
1631     AVC_CLOSE,
1632
1633     AVC_FLUSH,
1634     // pin - struct { uint8_t* src, uint_t src_size }
1635     // pout - struct { AVPicture* img, consumed_bytes,
1636     AVC_DECODE,
1637     // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1638     // pout - uint_t used_from_dest_size
1639     AVC_ENCODE,
1640
1641     // query/get video commands
1642     AVC_GET_VERSION = 0xACB000,
1643     AVC_GET_WIDTH,
1644     AVC_GET_HEIGHT,
1645     AVC_GET_DELAY,
1646     AVC_GET_QUANT_TABLE,
1647     // ...
1648
1649     // query/get audio commands
1650     AVC_GET_FRAME_SIZE = 0xABC000,
1651
1652     // maybe define some simple structure which
1653     // might be passed to the user - but they can't
1654     // contain any codec specific parts and these
1655     // calls are usualy necessary only few times
1656
1657     // set video commands
1658     AVC_SET_WIDTH = 0xACD000,
1659     AVC_SET_HEIGHT,
1660
1661     // set video encoding commands
1662     AVC_SET_FRAME_RATE = 0xACD800,
1663     AVC_SET_QUALITY,
1664     AVC_SET_HURRY_UP,
1665
1666     // set audio commands
1667     AVC_SET_SAMPLE_RATE = 0xACE000,
1668     AVC_SET_CHANNELS,
1669
1670 } avc_cmd_t;
1671
1672 /**
1673  * \param handle  allocated private structure by libavcodec
1674  *                for initialization pass NULL - will be returned pout
1675  *                user is supposed to know nothing about its structure
1676  * \param cmd     type of operation to be performed
1677  * \param pint    input parameter
1678  * \param pout    output parameter
1679  *
1680  * \returns  command status - eventually for query command it might return
1681  * integer resulting value
1682  */
1683 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1684
1685 /* memory */
1686 void *av_malloc(unsigned int size);
1687 void *av_mallocz(unsigned int size);
1688 void *av_realloc(void *ptr, unsigned int size);
1689 void av_free(void *ptr);
1690 char *av_strdup(const char *s);
1691 void __av_freep(void **ptr);
1692 #define av_freep(p) __av_freep((void **)(p))
1693 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1694 /* for static data only */
1695 /* call av_free_static to release all staticaly allocated tables */
1696 void av_free_static(void);
1697 void *__av_mallocz_static(void** location, unsigned int size);
1698 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1699
1700 #ifdef __cplusplus
1701 }
1702 #endif
1703
1704 #endif /* AVCODEC_H */