15 #include <sys/types.h> /* size_t */
17 #define AV_STRINGIFY(s) AV_TOSTRING(s)
18 #define AV_TOSTRING(s) #s
20 #define LIBAVCODEC_VERSION_INT ((51<<16)+(14<<8)+0)
21 #define LIBAVCODEC_VERSION 51.14.0
22 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
24 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
26 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
27 #define AV_TIME_BASE 1000000
28 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
33 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
34 CODEC_ID_MPEG2VIDEO_XVMC,
71 CODEC_ID_INTERPLAY_VIDEO,
111 CODEC_ID_TRUEMOTION2,
128 /* various pcm "codecs" */
129 CODEC_ID_PCM_S16LE= 0x10000,
145 CODEC_ID_PCM_S24DAUD,
147 /* various adpcm codecs */
148 CODEC_ID_ADPCM_IMA_QT= 0x11000,
149 CODEC_ID_ADPCM_IMA_WAV,
150 CODEC_ID_ADPCM_IMA_DK3,
151 CODEC_ID_ADPCM_IMA_DK4,
152 CODEC_ID_ADPCM_IMA_WS,
153 CODEC_ID_ADPCM_IMA_SMJPEG,
162 CODEC_ID_ADPCM_YAMAHA,
163 CODEC_ID_ADPCM_SBPRO_4,
164 CODEC_ID_ADPCM_SBPRO_3,
165 CODEC_ID_ADPCM_SBPRO_2,
168 CODEC_ID_AMR_NB= 0x12000,
171 /* RealAudio codecs*/
172 CODEC_ID_RA_144= 0x13000,
175 /* various DPCM codecs */
176 CODEC_ID_ROQ_DPCM= 0x14000,
177 CODEC_ID_INTERPLAY_DPCM,
181 CODEC_ID_MP2= 0x15000,
182 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
201 CODEC_ID_WESTWOOD_SND1,
210 /* subtitle codecs */
211 CODEC_ID_DVD_SUBTITLE= 0x17000,
212 CODEC_ID_DVB_SUBTITLE,
214 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
215 stream (only used by libavformat) */
218 /* CODEC_ID_MP3LAME is absolete */
219 #define CODEC_ID_MP3LAME CODEC_ID_MP3
222 CODEC_TYPE_UNKNOWN = -1,
229 /* currently unused, may be used if 24/32 bits samples ever supported */
230 /* all in native endian */
232 SAMPLE_FMT_NONE = -1,
233 SAMPLE_FMT_U8, ///< unsigned 8 bits
234 SAMPLE_FMT_S16, ///< signed 16 bits
235 SAMPLE_FMT_S24, ///< signed 24 bits
236 SAMPLE_FMT_S32, ///< signed 32 bits
237 SAMPLE_FMT_FLT, ///< float
241 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
244 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
245 * this is mainly needed because some optimized bitstream readers read
246 * 32 or 64 bit at once and could read over the end<br>
247 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
248 * MPEG bitstreams could cause overread and segfault
250 #define FF_INPUT_BUFFER_PADDING_SIZE 8
253 * minimum encoding buffer size.
254 * used to avoid some checks during header writing
256 #define FF_MIN_BUFFER_SIZE 16384
258 /* motion estimation type, EPZS by default */
272 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
273 AVDISCARD_NONE =-16, ///< discard nothing
274 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
275 AVDISCARD_NONREF = 8, ///< discard all non reference
276 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
277 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
278 AVDISCARD_ALL = 48, ///< discard all
281 typedef struct RcOverride{
284 int qscale; // if this is 0 then quality_factor will be used instead
285 float quality_factor;
288 #define FF_MAX_B_FRAMES 16
291 these flags can be passed in AVCodecContext.flags before initing
292 Note: not everything is supported yet.
295 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
296 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
297 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
298 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
299 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
300 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
301 /* parent program gurantees that the input for b-frame containing streams is not written to
302 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
303 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
304 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
305 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
306 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
307 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
308 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
309 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
310 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
311 of only at frame boundaries */
312 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
313 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
314 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
315 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
316 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
317 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
318 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
319 /* Fx : Flag for h263+ extra options */
320 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
321 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
322 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
323 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
324 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
325 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
326 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
327 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
328 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
329 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
330 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
331 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
332 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
333 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
334 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
335 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
336 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
337 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
338 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
339 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
340 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
341 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
342 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
343 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
344 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
346 /* Unsupported options :
347 * Syntax Arithmetic coding (SAC)
348 * Reference Picture Selection
349 * Independant Segment Decoding */
351 /* codec capabilities */
353 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
355 * Codec uses get_buffer() for allocating buffers.
356 * direct rendering method 1
358 #define CODEC_CAP_DR1 0x0002
359 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
361 #define CODEC_CAP_PARSE_ONLY 0x0004
362 #define CODEC_CAP_TRUNCATED 0x0008
363 /* codec can export data for HW decoding (XvMC) */
364 #define CODEC_CAP_HWACCEL 0x0010
366 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
367 * if this is not set, the codec is guranteed to never be feeded with NULL data
369 #define CODEC_CAP_DELAY 0x0020
371 * Codec can be fed a final frame with a smaller size.
372 * This can be used to prevent truncation of the last audio samples.
374 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
376 //the following defines may change, don't expect compatibility if you use them
377 #define MB_TYPE_INTRA4x4 0x0001
378 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
379 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
380 #define MB_TYPE_16x16 0x0008
381 #define MB_TYPE_16x8 0x0010
382 #define MB_TYPE_8x16 0x0020
383 #define MB_TYPE_8x8 0x0040
384 #define MB_TYPE_INTERLACED 0x0080
385 #define MB_TYPE_DIRECT2 0x0100 //FIXME
386 #define MB_TYPE_ACPRED 0x0200
387 #define MB_TYPE_GMC 0x0400
388 #define MB_TYPE_SKIP 0x0800
389 #define MB_TYPE_P0L0 0x1000
390 #define MB_TYPE_P1L0 0x2000
391 #define MB_TYPE_P0L1 0x4000
392 #define MB_TYPE_P1L1 0x8000
393 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
394 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
395 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
396 #define MB_TYPE_QUANT 0x00010000
397 #define MB_TYPE_CBP 0x00020000
398 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
402 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
404 typedef struct AVPanScan{
407 * - encoding: set by user.
408 * - decoding: set by lavc
413 * width and height in 1/16 pel
414 * - encoding: set by user.
415 * - decoding: set by lavc
421 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
422 * - encoding: set by user.
423 * - decoding: set by lavc
425 int16_t position[3][2];
428 #define FF_COMMON_FRAME \
430 * pointer to the picture planes.\
431 * this might be different from the first allocated byte\
438 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
439 * this isn't used by lavc unless the default get/release_buffer() is used\
445 * 1 -> keyframe, 0-> not\
446 * - encoding: set by lavc\
447 * - decoding: set by lavc\
452 * picture type of the frame, see ?_TYPE below.\
453 * - encoding: set by lavc for coded_picture (and set by user for input)\
454 * - decoding: set by lavc\
459 * presentation timestamp in time_base units (time when frame should be shown to user)\
460 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
461 * - encoding: MUST be set by user\
462 * - decoding: set by lavc\
467 * picture number in bitstream order.\
468 * - encoding: set by\
469 * - decoding: set by lavc\
471 int coded_picture_number;\
473 * picture number in display order.\
474 * - encoding: set by\
475 * - decoding: set by lavc\
477 int display_picture_number;\
480 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
481 * - encoding: set by lavc for coded_picture (and set by user for input)\
482 * - decoding: set by lavc\
487 * buffer age (1->was last buffer and dint change, 2->..., ...).\
488 * set to INT_MAX if the buffer has not been used yet \
489 * - encoding: unused\
490 * - decoding: MUST be set by get_buffer()\
495 * is this picture used as reference\
496 * - encoding: unused\
497 * - decoding: set by lavc (before get_buffer() call))\
503 * - encoding: unused\
504 * - decoding: set by lavc\
506 int8_t *qscale_table;\
509 * - encoding: unused\
510 * - decoding: set by lavc\
515 * mbskip_table[mb]>=1 if MB didnt change\
516 * stride= mb_width = (width+15)>>4\
517 * - encoding: unused\
518 * - decoding: set by lavc\
520 uint8_t *mbskip_table;\
523 * Motion vector table.\
526 * int mv_sample_log2= 4 - motion_subsample_log2;\
527 * int mb_width= (width+15)>>4;\
528 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
529 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
531 * - encoding: set by user\
532 * - decoding: set by lavc\
534 int16_t (*motion_val[2])[2];\
537 * Macroblock type table\
538 * mb_type_base + mb_width + 2\
539 * - encoding: set by user\
540 * - decoding: set by lavc\
545 * log2 of the size of the block which a single vector in motion_val represents: \
546 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
547 * - encoding: unused\
548 * - decoding: set by lavc\
550 uint8_t motion_subsample_log2;\
553 * for some private data of the user\
554 * - encoding: unused\
555 * - decoding: set by user\
561 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
562 * - decoding: unused\
567 * type of the buffer (to keep track of who has to dealloc data[*])\
568 * - encoding: set by the one who allocs it\
569 * - decoding: set by the one who allocs it\
570 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
575 * when decoding, this signal how much the picture must be delayed.\
576 * extra_delay = repeat_pict / (2*fps)\
577 * - encoding: unused\
578 * - decoding: set by lavc\
588 * The content of the picture is interlaced.\
589 * - encoding: set by user\
590 * - decoding: set by lavc (default 0)\
592 int interlaced_frame;\
595 * if the content is interlaced, is top field displayed first.\
596 * - encoding: set by user\
597 * - decoding: set by lavc\
599 int top_field_first;\
603 * - encoding: set by user\
604 * - decoding: set by lavc\
606 AVPanScan *pan_scan;\
609 * tell user application that palette has changed from previous frame.\
610 * - encoding: ??? (no palette-enabled encoder yet)\
611 * - decoding: set by lavc (default 0)\
613 int palette_has_changed;\
616 * Codec suggestion on buffer type if != 0\
617 * - encoding: unused\
618 * - decoding: set by lavc (before get_buffer() call))\
624 * - encoding: unused\
625 * - decoding: set by lavc\
630 * Motion referece frame index\
631 * - encoding: set by user\
632 * - decoding: set by lavc\
634 int8_t *ref_index[2];
636 #define FF_QSCALE_TYPE_MPEG1 0
637 #define FF_QSCALE_TYPE_MPEG2 1
638 #define FF_QSCALE_TYPE_H264 2
640 #define FF_BUFFER_TYPE_INTERNAL 1
641 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
642 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
643 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
646 #define FF_I_TYPE 1 // Intra
647 #define FF_P_TYPE 2 // Predicted
648 #define FF_B_TYPE 3 // Bi-dir predicted
649 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
653 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
654 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
655 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
656 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
661 typedef struct AVFrame {
665 #define DEFAULT_FRAME_RATE_BASE 1001000
668 * main external api structure.
670 typedef struct AVCodecContext {
672 * Info on struct for av_log
673 * - set by avcodec_alloc_context
677 * the average bitrate.
678 * - encoding: set by user. unused for constant quantizer encoding
679 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
684 * number of bits the bitstream is allowed to diverge from the reference.
685 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
686 * - encoding: set by user. unused for constant quantizer encoding
689 int bit_rate_tolerance;
693 * - encoding: set by user.
694 * - decoding: set by user.
699 * some codecs needs additionnal format info. It is stored here
700 * - encoding: set by user.
701 * - decoding: set by lavc. (FIXME is this ok?)
706 * motion estimation algorithm used for video coding.
707 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
708 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
709 * - encoding: MUST be set by user.
715 * some codecs need / can use extra-data like huffman tables.
716 * mjpeg: huffman tables
717 * rv10: additional flags
718 * mpeg4: global headers (they can be in the bitstream or here)
719 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
720 * then extradata_size to avoid prolems if its read with the bitstream reader
721 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
722 * - encoding: set/allocated/freed by lavc.
723 * - decoding: set/allocated/freed by user.
729 * this is the fundamental unit of time (in seconds) in terms
730 * of which frame timestamps are represented. for fixed-fps content,
731 * timebase should be 1/framerate and timestamp increments should be
733 * - encoding: MUST be set by user
734 * - decoding: set by lavc.
736 AVRational time_base;
740 * picture width / height.
741 * - encoding: MUST be set by user.
742 * - decoding: set by lavc.
743 * Note, for compatibility its possible to set this instead of
744 * coded_width/height before decoding
748 #define FF_ASPECT_EXTENDED 15
751 * the number of pictures in a group of pitures, or 0 for intra_only.
752 * - encoding: set by user.
758 * pixel format, see PIX_FMT_xxx.
759 * - encoding: set by user.
760 * - decoding: set by lavc.
762 enum PixelFormat pix_fmt;
765 * Frame rate emulation. If not zero lower layer (i.e. format handler)
766 * has to read frames at native frame rate.
767 * - encoding: set by user.
768 * - decoding: unused.
773 * if non NULL, 'draw_horiz_band' is called by the libavcodec
774 * decoder to draw an horizontal band. It improve cache usage. Not
775 * all codecs can do that. You must check the codec capabilities
778 * - decoding: set by user.
779 * @param height the height of the slice
780 * @param y the y position of the slice
781 * @param type 1->top field, 2->bottom field, 3->frame
782 * @param offset offset into the AVFrame.data from which the slice should be read
784 void (*draw_horiz_band)(struct AVCodecContext *s,
785 const AVFrame *src, int offset[4],
786 int y, int type, int height);
789 int sample_rate; ///< samples per sec
793 * audio sample format.
794 * - encoding: set by user.
795 * - decoding: set by lavc.
797 enum SampleFormat sample_fmt; ///< sample format, currenly unused
799 /* the following data should not be initialized */
801 * samples per packet. initialized when calling 'init'
804 int frame_number; ///< audio or video frame number
805 int real_pict_num; ///< returns the real picture number of previous encoded frame
808 * number of frames the decoded output will be delayed relative to
810 * - encoding: set by lavc.
815 /* - encoding parameters */
816 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
817 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
821 * - encoding: set by user.
828 * - encoding: set by user.
834 * maximum quantizer difference etween frames.
835 * - encoding: set by user.
841 * maximum number of b frames between non b frames.
842 * note: the output will be delayed by max_b_frames+1 relative to the input
843 * - encoding: set by user.
849 * qscale factor between ip and b frames.
850 * - encoding: set by user.
853 float b_quant_factor;
855 /** obsolete FIXME remove */
857 #define FF_RC_STRATEGY_XVID 1
859 int b_frame_strategy;
863 * deprecated in favor of skip_idct and skip_frame
865 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
869 struct AVCodec *codec;
873 /* unused, FIXME remove*/
876 int rtp_payload_size; /* The size of the RTP payload: the coder will */
877 /* do it's best to deliver a chunk with size */
878 /* below rtp_payload_size, the chunk will start */
879 /* with a start code on some codecs like H.263 */
880 /* This doesn't take account of any particular */
881 /* headers inside the transmited RTP payload */
884 /* The RTP callback: This function is called */
885 /* every time the encoder has a packet to send */
886 /* Depends on the encoder if the data starts */
887 /* with a Start Code (it should) H.263 does. */
888 /* mb_nb contains the number of macroblocks */
889 /* encoded in the RTP payload */
890 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
892 /* statistics, used for 2-pass encoding */
903 * number of bits used for the previously encoded frame.
904 * - encoding: set by lavc
910 * private data of the user, can be used to carry app specific stuff.
911 * - encoding: set by user
912 * - decoding: set by user
917 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
918 enum CodecID codec_id; /* see CODEC_ID_xxx */
921 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
922 * this is used to workaround some encoder bugs
923 * - encoding: set by user, if not then the default based on codec_id will be used
924 * - decoding: set by user, will be converted to upper case by lavc during init
926 unsigned int codec_tag;
929 * workaround bugs in encoders which sometimes cannot be detected automatically.
930 * - encoding: set by user
931 * - decoding: set by user
934 #define FF_BUG_AUTODETECT 1 ///< autodetection
935 #define FF_BUG_OLD_MSMPEG4 2
936 #define FF_BUG_XVID_ILACE 4
937 #define FF_BUG_UMP4 8
938 #define FF_BUG_NO_PADDING 16
939 #define FF_BUG_AMV 32
940 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
941 #define FF_BUG_QPEL_CHROMA 64
942 #define FF_BUG_STD_QPEL 128
943 #define FF_BUG_QPEL_CHROMA2 256
944 #define FF_BUG_DIRECT_BLOCKSIZE 512
945 #define FF_BUG_EDGE 1024
946 #define FF_BUG_HPEL_CHROMA 2048
947 #define FF_BUG_DC_CLIP 4096
948 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
949 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
952 * luma single coeff elimination threshold.
953 * - encoding: set by user
956 int luma_elim_threshold;
959 * chroma single coeff elimination threshold.
960 * - encoding: set by user
963 int chroma_elim_threshold;
966 * strictly follow the std (MPEG4, ...).
967 * - encoding: set by user
970 int strict_std_compliance;
971 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
972 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
973 #define FF_COMPLIANCE_NORMAL 0
974 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
975 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
978 * qscale offset between ip and b frames.
979 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
980 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
981 * - encoding: set by user.
984 float b_quant_offset;
987 * error resilience higher values will detect more errors but may missdetect
988 * some more or less valid parts as errors.
990 * - decoding: set by user
992 int error_resilience;
993 #define FF_ER_CAREFUL 1
994 #define FF_ER_COMPLIANT 2
995 #define FF_ER_AGGRESSIVE 3
996 #define FF_ER_VERY_AGGRESSIVE 4
999 * called at the beginning of each frame to get a buffer for it.
1000 * if pic.reference is set then the frame will be read later by lavc
1001 * avcodec_align_dimensions() should be used to find the required width and
1002 * height, as they normally need to be rounded up to the next multiple of 16
1003 * - encoding: unused
1004 * - decoding: set by lavc, user can override
1006 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1009 * called to release buffers which where allocated with get_buffer.
1010 * a released buffer can be reused in get_buffer()
1011 * pic.data[*] must be set to NULL
1012 * - encoding: unused
1013 * - decoding: set by lavc, user can override
1015 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1018 * if 1 the stream has a 1 frame delay during decoding.
1019 * - encoding: set by lavc
1020 * - decoding: set by lavc
1025 * number of bytes per packet if constant and known or 0
1026 * used by some WAV based audio codecs
1030 int parse_only; /* - decoding only: if true, only parsing is done
1031 (function avcodec_parse_frame()). The frame
1032 data is returned. Only MPEG codecs support this now. */
1035 * 0-> h263 quant 1-> mpeg quant.
1036 * - encoding: set by user.
1037 * - decoding: unused
1042 * pass1 encoding statistics output buffer.
1043 * - encoding: set by lavc
1044 * - decoding: unused
1049 * pass2 encoding statistics input buffer.
1050 * concatenated stuff from stats_out of pass1 should be placed here
1051 * - encoding: allocated/set/freed by user
1052 * - decoding: unused
1057 * ratecontrol qmin qmax limiting method.
1058 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1059 * - encoding: set by user.
1060 * - decoding: unused
1068 * ratecontrol override, see RcOverride.
1069 * - encoding: allocated/set/freed by user.
1070 * - decoding: unused
1072 RcOverride *rc_override;
1073 int rc_override_count;
1076 * rate control equation.
1077 * - encoding: set by user
1078 * - decoding: unused
1084 * - encoding: set by user.
1085 * - decoding: unused
1091 * - encoding: set by user.
1092 * - decoding: unused
1097 * decoder bitstream buffer size.
1098 * - encoding: set by user.
1099 * - decoding: unused
1102 float rc_buffer_aggressivity;
1105 * qscale factor between p and i frames.
1106 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1107 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1108 * - encoding: set by user.
1109 * - decoding: unused
1111 float i_quant_factor;
1114 * qscale offset between p and i frames.
1115 * - encoding: set by user.
1116 * - decoding: unused
1118 float i_quant_offset;
1121 * initial complexity for pass1 ratecontrol.
1122 * - encoding: set by user.
1123 * - decoding: unused
1125 float rc_initial_cplx;
1128 * dct algorithm, see FF_DCT_* below.
1129 * - encoding: set by user
1130 * - decoding: unused
1133 #define FF_DCT_AUTO 0
1134 #define FF_DCT_FASTINT 1
1135 #define FF_DCT_INT 2
1136 #define FF_DCT_MMX 3
1137 #define FF_DCT_MLIB 4
1138 #define FF_DCT_ALTIVEC 5
1139 #define FF_DCT_FAAN 6
1142 * luminance masking (0-> disabled).
1143 * - encoding: set by user
1144 * - decoding: unused
1149 * temporary complexity masking (0-> disabled).
1150 * - encoding: set by user
1151 * - decoding: unused
1153 float temporal_cplx_masking;
1156 * spatial complexity masking (0-> disabled).
1157 * - encoding: set by user
1158 * - decoding: unused
1160 float spatial_cplx_masking;
1163 * p block masking (0-> disabled).
1164 * - encoding: set by user
1165 * - decoding: unused
1170 * darkness masking (0-> disabled).
1171 * - encoding: set by user
1172 * - decoding: unused
1177 /* for binary compatibility */
1181 * idct algorithm, see FF_IDCT_* below.
1182 * - encoding: set by user
1183 * - decoding: set by user
1186 #define FF_IDCT_AUTO 0
1187 #define FF_IDCT_INT 1
1188 #define FF_IDCT_SIMPLE 2
1189 #define FF_IDCT_SIMPLEMMX 3
1190 #define FF_IDCT_LIBMPEG2MMX 4
1191 #define FF_IDCT_PS2 5
1192 #define FF_IDCT_MLIB 6
1193 #define FF_IDCT_ARM 7
1194 #define FF_IDCT_ALTIVEC 8
1195 #define FF_IDCT_SH4 9
1196 #define FF_IDCT_SIMPLEARM 10
1197 #define FF_IDCT_H264 11
1198 #define FF_IDCT_VP3 12
1199 #define FF_IDCT_IPP 13
1200 #define FF_IDCT_XVIDMMX 14
1201 #define FF_IDCT_CAVS 15
1205 * - encoding: set by lavc
1206 * - decoding: set by user (or 0)
1210 * slice offsets in the frame in bytes.
1211 * - encoding: set/allocated by lavc
1212 * - decoding: set/allocated by user (or NULL)
1217 * error concealment flags.
1218 * - encoding: unused
1219 * - decoding: set by user
1221 int error_concealment;
1222 #define FF_EC_GUESS_MVS 1
1223 #define FF_EC_DEBLOCK 2
1226 * dsp_mask could be add used to disable unwanted CPU features
1227 * CPU features (i.e. MMX, SSE. ...)
1229 * with FORCE flag you may instead enable given CPU features
1230 * (Dangerous: usable in case of misdetection, improper usage however will
1231 * result into program crash)
1234 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1235 /* lower 16 bits - CPU features */
1237 #define FF_MM_MMX 0x0001 /* standard MMX */
1238 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1239 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1240 #define FF_MM_SSE 0x0008 /* SSE functions */
1241 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1242 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1243 #endif /* HAVE_MMX */
1245 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1246 #endif /* HAVE_IWMMXT */
1249 * bits per sample/pixel from the demuxer (needed for huffyuv).
1250 * - encoding: set by lavc
1251 * - decoding: set by user
1253 int bits_per_sample;
1256 * prediction method (needed for huffyuv).
1257 * - encoding: set by user
1258 * - decoding: unused
1260 int prediction_method;
1261 #define FF_PRED_LEFT 0
1262 #define FF_PRED_PLANE 1
1263 #define FF_PRED_MEDIAN 2
1266 * sample aspect ratio (0 if unknown).
1267 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1268 * - encoding: set by user.
1269 * - decoding: set by lavc.
1271 AVRational sample_aspect_ratio;
1274 * the picture in the bitstream.
1275 * - encoding: set by lavc
1276 * - decoding: set by lavc
1278 AVFrame *coded_frame;
1282 * - encoding: set by user.
1283 * - decoding: set by user.
1286 #define FF_DEBUG_PICT_INFO 1
1287 #define FF_DEBUG_RC 2
1288 #define FF_DEBUG_BITSTREAM 4
1289 #define FF_DEBUG_MB_TYPE 8
1290 #define FF_DEBUG_QP 16
1291 #define FF_DEBUG_MV 32
1292 #define FF_DEBUG_DCT_COEFF 0x00000040
1293 #define FF_DEBUG_SKIP 0x00000080
1294 #define FF_DEBUG_STARTCODE 0x00000100
1295 #define FF_DEBUG_PTS 0x00000200
1296 #define FF_DEBUG_ER 0x00000400
1297 #define FF_DEBUG_MMCO 0x00000800
1298 #define FF_DEBUG_BUGS 0x00001000
1299 #define FF_DEBUG_VIS_QP 0x00002000
1300 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1304 * - encoding: set by user.
1305 * - decoding: set by user.
1308 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1309 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1310 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1314 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1315 * - decoding: unused
1320 * minimum MB quantizer.
1321 * - encoding: unused
1322 * - decoding: unused
1327 * maximum MB quantizer.
1328 * - encoding: unused
1329 * - decoding: unused
1334 * motion estimation compare function.
1335 * - encoding: set by user.
1336 * - decoding: unused
1340 * subpixel motion estimation compare function.
1341 * - encoding: set by user.
1342 * - decoding: unused
1346 * macroblock compare function (not supported yet).
1347 * - encoding: set by user.
1348 * - decoding: unused
1352 * interlaced dct compare function
1353 * - encoding: set by user.
1354 * - decoding: unused
1357 #define FF_CMP_SAD 0
1358 #define FF_CMP_SSE 1
1359 #define FF_CMP_SATD 2
1360 #define FF_CMP_DCT 3
1361 #define FF_CMP_PSNR 4
1362 #define FF_CMP_BIT 5
1364 #define FF_CMP_ZERO 7
1365 #define FF_CMP_VSAD 8
1366 #define FF_CMP_VSSE 9
1367 #define FF_CMP_NSSE 10
1368 #define FF_CMP_W53 11
1369 #define FF_CMP_W97 12
1370 #define FF_CMP_DCTMAX 13
1371 #define FF_CMP_DCT264 14
1372 #define FF_CMP_CHROMA 256
1375 * ME diamond size & shape.
1376 * - encoding: set by user.
1377 * - decoding: unused
1382 * amount of previous MV predictors (2a+1 x 2a+1 square).
1383 * - encoding: set by user.
1384 * - decoding: unused
1386 int last_predictor_count;
1389 * pre pass for motion estimation.
1390 * - encoding: set by user.
1391 * - decoding: unused
1396 * motion estimation pre pass compare function.
1397 * - encoding: set by user.
1398 * - decoding: unused
1403 * ME pre pass diamond size & shape.
1404 * - encoding: set by user.
1405 * - decoding: unused
1410 * subpel ME quality.
1411 * - encoding: set by user.
1412 * - decoding: unused
1414 int me_subpel_quality;
1417 * callback to negotiate the pixelFormat.
1418 * @param fmt is the list of formats which are supported by the codec,
1419 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1420 * the first is allways the native one
1421 * @return the choosen format
1422 * - encoding: unused
1423 * - decoding: set by user, if not set then the native format will always be choosen
1425 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1428 * DTG active format information (additionnal aspect ratio
1429 * information only used in DVB MPEG2 transport streams). 0 if
1432 * - encoding: unused.
1433 * - decoding: set by decoder
1435 int dtg_active_format;
1436 #define FF_DTG_AFD_SAME 8
1437 #define FF_DTG_AFD_4_3 9
1438 #define FF_DTG_AFD_16_9 10
1439 #define FF_DTG_AFD_14_9 11
1440 #define FF_DTG_AFD_4_3_SP_14_9 13
1441 #define FF_DTG_AFD_16_9_SP_14_9 14
1442 #define FF_DTG_AFD_SP_4_3 15
1445 * Maximum motion estimation search range in subpel units.
1446 * if 0 then no limit
1448 * - encoding: set by user.
1449 * - decoding: unused.
1454 * intra quantizer bias.
1455 * - encoding: set by user.
1456 * - decoding: unused
1458 int intra_quant_bias;
1459 #define FF_DEFAULT_QUANT_BIAS 999999
1462 * inter quantizer bias.
1463 * - encoding: set by user.
1464 * - decoding: unused
1466 int inter_quant_bias;
1470 * - encoding: unused.
1471 * - decoding: which clrtable should be used for 8bit RGB images
1472 * table have to be stored somewhere FIXME
1477 * internal_buffer count.
1478 * Don't touch, used by lavc default_get_buffer()
1480 int internal_buffer_count;
1484 * Don't touch, used by lavc default_get_buffer()
1486 void *internal_buffer;
1488 #define FF_LAMBDA_SHIFT 7
1489 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1490 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1491 #define FF_LAMBDA_MAX (256*128-1)
1493 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1495 * global quality for codecs which cannot change it per frame.
1496 * this should be proportional to MPEG1/2/4 qscale.
1497 * - encoding: set by user.
1498 * - decoding: unused
1502 #define FF_CODER_TYPE_VLC 0
1503 #define FF_CODER_TYPE_AC 1
1506 * - encoding: set by user.
1507 * - decoding: unused
1513 * - encoding: set by user.
1514 * - decoding: unused
1520 * - encoding: unused
1521 * - decoding: set by user.
1523 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1528 * - encoding: unused
1529 * - decoding: set by user.
1532 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1533 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1534 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1537 * XVideo Motion Acceleration
1538 * - encoding: forbidden
1539 * - decoding: set by decoder
1541 int xvmc_acceleration;
1544 * macroblock decision mode
1545 * - encoding: set by user.
1546 * - decoding: unused
1549 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1550 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1551 #define FF_MB_DECISION_RD 2 ///< rate distoration
1554 * custom intra quantization matrix
1555 * - encoding: set by user, can be NULL
1556 * - decoding: set by lavc
1558 uint16_t *intra_matrix;
1561 * custom inter quantization matrix
1562 * - encoding: set by user, can be NULL
1563 * - decoding: set by lavc
1565 uint16_t *inter_matrix;
1568 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1569 * this is used to workaround some encoder bugs
1570 * - encoding: unused
1571 * - decoding: set by user, will be converted to upper case by lavc during init
1573 unsigned int stream_codec_tag;
1576 * scene change detection threshold.
1577 * 0 is default, larger means fewer detected scene changes
1578 * - encoding: set by user.
1579 * - decoding: unused
1581 int scenechange_threshold;
1584 * minimum lagrange multipler
1585 * - encoding: set by user.
1586 * - decoding: unused
1591 * maximum lagrange multipler
1592 * - encoding: set by user.
1593 * - decoding: unused
1598 * Palette control structure
1599 * - encoding: ??? (no palette-enabled encoder yet)
1600 * - decoding: set by user.
1602 struct AVPaletteControl *palctrl;
1605 * noise reduction strength
1606 * - encoding: set by user.
1607 * - decoding: unused
1609 int noise_reduction;
1612 * called at the beginning of a frame to get cr buffer for it.
1613 * buffer type (size, hints) must be the same. lavc won't check it.
1614 * lavc will pass previous buffer in pic, function should return
1615 * same buffer or new buffer with old frame "painted" into it.
1616 * if pic.data[0] == NULL must behave like get_buffer().
1617 * - encoding: unused
1618 * - decoding: set by lavc, user can override
1620 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1623 * number of bits which should be loaded into the rc buffer before decoding starts
1624 * - encoding: set by user.
1625 * - decoding: unused
1627 int rc_initial_buffer_occupancy;
1631 * - encoding: set by user.
1632 * - decoding: unused
1634 int inter_threshold;
1638 * - encoding: set by user.
1639 * - decoding: set by user.
1644 * simulates errors in the bitstream to test error concealment.
1645 * - encoding: set by user.
1646 * - decoding: unused.
1651 * MP3 antialias algorithm, see FF_AA_* below.
1652 * - encoding: unused
1653 * - decoding: set by user
1656 #define FF_AA_AUTO 0
1657 #define FF_AA_FASTINT 1 //not implemented yet
1659 #define FF_AA_FLOAT 3
1661 * Quantizer noise shaping.
1662 * - encoding: set by user
1663 * - decoding: unused
1665 int quantizer_noise_shaping;
1669 * is used to decide how many independant tasks should be passed to execute()
1670 * - encoding: set by user
1671 * - decoding: set by user
1676 * the codec may call this to execute several independant things. it will return only after
1677 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1678 * default implementation will execute the parts serially
1679 * @param count the number of things to execute
1680 * - encoding: set by lavc, user can override
1681 * - decoding: set by lavc, user can override
1683 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1687 * can be used by execute() to store some per AVCodecContext stuff.
1688 * - encoding: set by execute()
1689 * - decoding: set by execute()
1691 void *thread_opaque;
1694 * Motion estimation threshold. under which no motion estimation is
1695 * performed, but instead the user specified motion vectors are used
1697 * - encoding: set by user
1698 * - decoding: unused
1703 * Macroblock threshold. under which the user specified macroblock types will be used
1704 * - encoding: set by user
1705 * - decoding: unused
1710 * precision of the intra dc coefficient - 8.
1711 * - encoding: set by user
1712 * - decoding: unused
1714 int intra_dc_precision;
1717 * noise vs. sse weight for the nsse comparsion function.
1718 * - encoding: set by user
1719 * - decoding: unused
1724 * number of macroblock rows at the top which are skipped.
1725 * - encoding: unused
1726 * - decoding: set by user
1731 * number of macroblock rows at the bottom which are skipped.
1732 * - encoding: unused
1733 * - decoding: set by user
1739 * - encoding: set by user
1740 * - decoding: set by lavc
1743 #define FF_PROFILE_UNKNOWN -99
1747 * - encoding: set by user
1748 * - decoding: set by lavc
1751 #define FF_LEVEL_UNKNOWN -99
1754 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1755 * - encoding: unused
1756 * - decoding: set by user
1761 * bitsream width / height. may be different from width/height if lowres
1762 * or other things are used
1763 * - encoding: unused
1764 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1766 int coded_width, coded_height;
1769 * frame skip threshold
1770 * - encoding: set by user
1771 * - decoding: unused
1773 int frame_skip_threshold;
1777 * - encoding: set by user
1778 * - decoding: unused
1780 int frame_skip_factor;
1783 * frame skip exponent
1784 * - encoding: set by user
1785 * - decoding: unused
1790 * frame skip comparission function
1791 * - encoding: set by user.
1792 * - decoding: unused
1797 * border processing masking. raises the quantizer for mbs on the borders
1799 * - encoding: set by user
1800 * - decoding: unused
1802 float border_masking;
1805 * minimum MB lagrange multipler.
1806 * - encoding: set by user.
1807 * - decoding: unused
1812 * maximum MB lagrange multipler.
1813 * - encoding: set by user.
1814 * - decoding: unused
1820 * - encoding: set by user.
1821 * - decoding: unused
1823 int me_penalty_compensation;
1827 * - encoding: unused
1828 * - decoding: set by user.
1830 enum AVDiscard skip_loop_filter;
1834 * - encoding: unused
1835 * - decoding: set by user.
1837 enum AVDiscard skip_idct;
1841 * - encoding: unused
1842 * - decoding: set by user.
1844 enum AVDiscard skip_frame;
1848 * - encoding: set by user.
1849 * - decoding: unused
1855 * - encoding: set by user.
1856 * - decoding: unused
1861 * constant rate factor - quality-based VBR - values ~correspond to qps
1862 * - encoding: set by user.
1863 * - decoding: unused
1868 * constant quantization parameter rate control method
1869 * - encoding: set by user.
1870 * - decoding: unused
1876 * - encoding: set by user.
1877 * - decoding: unused
1882 * number of reference frames
1883 * - encoding: set by user.
1884 * - decoding: unused
1889 * chroma qp offset from luma
1890 * - encoding: set by user.
1891 * - decoding: unused
1896 * influences how often b-frames are used
1897 * - encoding: set by user.
1898 * - decoding: unused
1903 * trellis RD quantization
1904 * - encoding: set by user.
1905 * - decoding: unused
1910 * reduce fluctuations in qp (before curve compression)
1911 * - encoding: set by user.
1912 * - decoding: unused
1914 float complexityblur;
1917 * in-loop deblocking filter alphac0 parameter
1918 * alpha is in the range -6...6
1919 * - encoding: set by user.
1920 * - decoding: unused
1925 * in-loop deblocking filter beta parameter
1926 * beta is in the range -6...6
1927 * - encoding: set by user.
1928 * - decoding: unused
1933 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1934 * - encoding: set by user.
1935 * - decoding: unused
1938 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1939 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1940 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1941 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1942 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1945 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1946 * - encoding: set by user.
1947 * - decoding: unused
1952 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1953 * - encoding: set by user.
1954 * - decoding: unused
1959 * multiplied by qscale for each frame and added to scene_change_score
1960 * - encoding: set by user.
1961 * - decoding: unused
1963 int scenechange_factor;
1967 * note: value depends upon the compare functin used for fullpel ME
1968 * - encoding: set by user.
1969 * - decoding: unused
1974 * adjusts sensitivity of b_frame_strategy 1
1975 * - encoding: set by user.
1976 * - decoding: unused
1981 * - encoding: set by user.
1982 * - decoding: unused
1984 int compression_level;
1985 #define FF_COMPRESSION_DEFAULT -1
1988 * sets whether to use LPC mode - used by FLAC encoder
1989 * - encoding: set by user.
1990 * - decoding: unused.
1995 * LPC coefficient precision - used by FLAC encoder
1996 * - encoding: set by user.
1997 * - decoding: unused.
1999 int lpc_coeff_precision;
2002 * - encoding: set by user.
2003 * - decoding: unused.
2005 int min_prediction_order;
2008 * - encoding: set by user.
2009 * - decoding: unused.
2011 int max_prediction_order;
2014 * search method for selecting prediction order
2015 * - encoding: set by user.
2016 * - decoding: unused.
2018 int prediction_order_method;
2021 * - encoding: set by user.
2022 * - decoding: unused.
2024 int min_partition_order;
2027 * - encoding: set by user.
2028 * - decoding: unused.
2030 int max_partition_order;
2036 typedef struct AVCodec {
2038 enum CodecType type;
2041 int (*init)(AVCodecContext *);
2042 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2043 int (*close)(AVCodecContext *);
2044 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2045 uint8_t *buf, int buf_size);
2047 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2048 void *dummy; // FIXME remove next time we break binary compatibility
2050 struct AVCodec *next;
2051 void (*flush)(AVCodecContext *);
2052 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2053 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2057 * four components are given, that's all.
2058 * the last component is alpha
2060 typedef struct AVPicture {
2062 int linesize[4]; ///< number of bytes per line
2067 * This structure defines a method for communicating palette changes
2068 * between and demuxer and a decoder.
2070 #define AVPALETTE_SIZE 1024
2071 #define AVPALETTE_COUNT 256
2072 typedef struct AVPaletteControl {
2074 /* demuxer sets this to 1 to indicate the palette has changed;
2075 * decoder resets to 0 */
2076 int palette_changed;
2078 /* 4-byte ARGB palette entries, stored in native byte order; note that
2079 * the individual palette components should be on a 8-bit scale; if
2080 * the palette data comes from a IBM VGA native format, the component
2081 * data is probably 6 bits in size and needs to be scaled */
2082 unsigned int palette[AVPALETTE_COUNT];
2086 typedef struct AVSubtitleRect {
2093 uint32_t *rgba_palette;
2097 typedef struct AVSubtitle {
2098 uint16_t format; /* 0 = graphics */
2099 uint32_t start_display_time; /* relative to packet pts, in ms */
2100 uint32_t end_display_time; /* relative to packet pts, in ms */
2102 AVSubtitleRect *rects;
2105 extern AVCodec ac3_encoder;
2106 extern AVCodec mp2_encoder;
2107 extern AVCodec mp3lame_encoder;
2108 extern AVCodec oggvorbis_encoder;
2109 extern AVCodec faac_encoder;
2110 extern AVCodec flac_encoder;
2111 extern AVCodec xvid_encoder;
2112 extern AVCodec mpeg1video_encoder;
2113 extern AVCodec mpeg2video_encoder;
2114 extern AVCodec h261_encoder;
2115 extern AVCodec h263_encoder;
2116 extern AVCodec h263p_encoder;
2117 extern AVCodec flv_encoder;
2118 extern AVCodec rv10_encoder;
2119 extern AVCodec rv20_encoder;
2120 extern AVCodec dvvideo_encoder;
2121 extern AVCodec mjpeg_encoder;
2122 extern AVCodec ljpeg_encoder;
2123 extern AVCodec jpegls_encoder;
2124 extern AVCodec png_encoder;
2125 extern AVCodec ppm_encoder;
2126 extern AVCodec pgm_encoder;
2127 extern AVCodec pgmyuv_encoder;
2128 extern AVCodec pbm_encoder;
2129 extern AVCodec pam_encoder;
2130 extern AVCodec mpeg4_encoder;
2131 extern AVCodec msmpeg4v1_encoder;
2132 extern AVCodec msmpeg4v2_encoder;
2133 extern AVCodec msmpeg4v3_encoder;
2134 extern AVCodec wmv1_encoder;
2135 extern AVCodec wmv2_encoder;
2136 extern AVCodec huffyuv_encoder;
2137 extern AVCodec ffvhuff_encoder;
2138 extern AVCodec h264_encoder;
2139 extern AVCodec asv1_encoder;
2140 extern AVCodec asv2_encoder;
2141 extern AVCodec vcr1_encoder;
2142 extern AVCodec ffv1_encoder;
2143 extern AVCodec snow_encoder;
2144 extern AVCodec mdec_encoder;
2145 extern AVCodec zlib_encoder;
2146 extern AVCodec sonic_encoder;
2147 extern AVCodec sonic_ls_encoder;
2148 extern AVCodec svq1_encoder;
2149 extern AVCodec x264_encoder;
2151 extern AVCodec h263_decoder;
2152 extern AVCodec h261_decoder;
2153 extern AVCodec mpeg4_decoder;
2154 extern AVCodec msmpeg4v1_decoder;
2155 extern AVCodec msmpeg4v2_decoder;
2156 extern AVCodec msmpeg4v3_decoder;
2157 extern AVCodec wmv1_decoder;
2158 extern AVCodec wmv2_decoder;
2159 extern AVCodec vc1_decoder;
2160 extern AVCodec wmv3_decoder;
2161 extern AVCodec mpeg1video_decoder;
2162 extern AVCodec mpeg2video_decoder;
2163 extern AVCodec mpegvideo_decoder;
2164 extern AVCodec mpeg_xvmc_decoder;
2165 extern AVCodec h263i_decoder;
2166 extern AVCodec flv_decoder;
2167 extern AVCodec rv10_decoder;
2168 extern AVCodec rv20_decoder;
2169 extern AVCodec rv30_decoder;
2170 extern AVCodec rv40_decoder;
2171 extern AVCodec svq1_decoder;
2172 extern AVCodec svq3_decoder;
2173 extern AVCodec dvvideo_decoder;
2174 extern AVCodec wmav1_decoder;
2175 extern AVCodec wmav2_decoder;
2176 extern AVCodec mjpeg_decoder;
2177 extern AVCodec mjpegb_decoder;
2178 extern AVCodec sp5x_decoder;
2179 extern AVCodec png_decoder;
2180 extern AVCodec mp2_decoder;
2181 extern AVCodec mp3_decoder;
2182 extern AVCodec mp3adu_decoder;
2183 extern AVCodec mp3on4_decoder;
2184 extern AVCodec qdm2_decoder;
2185 extern AVCodec cook_decoder;
2186 extern AVCodec truespeech_decoder;
2187 extern AVCodec tta_decoder;
2188 extern AVCodec mace3_decoder;
2189 extern AVCodec mace6_decoder;
2190 extern AVCodec huffyuv_decoder;
2191 extern AVCodec ffvhuff_decoder;
2192 extern AVCodec oggvorbis_decoder;
2193 extern AVCodec cyuv_decoder;
2194 extern AVCodec h264_decoder;
2195 extern AVCodec indeo3_decoder;
2196 extern AVCodec vp3_decoder;
2197 extern AVCodec theora_decoder;
2198 extern AVCodec vp5_decoder;
2199 extern AVCodec vp6_decoder;
2200 extern AVCodec vp6f_decoder;
2201 extern AVCodec amr_nb_decoder;
2202 extern AVCodec amr_nb_encoder;
2203 extern AVCodec amr_wb_encoder;
2204 extern AVCodec amr_wb_decoder;
2205 extern AVCodec aac_decoder;
2206 extern AVCodec mpeg4aac_decoder;
2207 extern AVCodec asv1_decoder;
2208 extern AVCodec asv2_decoder;
2209 extern AVCodec vcr1_decoder;
2210 extern AVCodec cljr_decoder;
2211 extern AVCodec ffv1_decoder;
2212 extern AVCodec snow_decoder;
2213 extern AVCodec fourxm_decoder;
2214 extern AVCodec mdec_decoder;
2215 extern AVCodec roq_decoder;
2216 extern AVCodec interplay_video_decoder;
2217 extern AVCodec xan_wc3_decoder;
2218 extern AVCodec rpza_decoder;
2219 extern AVCodec cinepak_decoder;
2220 extern AVCodec msrle_decoder;
2221 extern AVCodec msvideo1_decoder;
2222 extern AVCodec vqa_decoder;
2223 extern AVCodec idcin_decoder;
2224 extern AVCodec eightbps_decoder;
2225 extern AVCodec smc_decoder;
2226 extern AVCodec flic_decoder;
2227 extern AVCodec vmdvideo_decoder;
2228 extern AVCodec vmdaudio_decoder;
2229 extern AVCodec truemotion1_decoder;
2230 extern AVCodec truemotion2_decoder;
2231 extern AVCodec mszh_decoder;
2232 extern AVCodec zlib_decoder;
2233 extern AVCodec ra_144_decoder;
2234 extern AVCodec ra_288_decoder;
2235 extern AVCodec roq_dpcm_decoder;
2236 extern AVCodec interplay_dpcm_decoder;
2237 extern AVCodec xan_dpcm_decoder;
2238 extern AVCodec sol_dpcm_decoder;
2239 extern AVCodec sonic_decoder;
2240 extern AVCodec qtrle_decoder;
2241 extern AVCodec flac_decoder;
2242 extern AVCodec tscc_decoder;
2243 extern AVCodec cscd_decoder;
2244 extern AVCodec nuv_decoder;
2245 extern AVCodec ulti_decoder;
2246 extern AVCodec qdraw_decoder;
2247 extern AVCodec xl_decoder;
2248 extern AVCodec qpeg_decoder;
2249 extern AVCodec shorten_decoder;
2250 extern AVCodec loco_decoder;
2251 extern AVCodec wnv1_decoder;
2252 extern AVCodec aasc_decoder;
2253 extern AVCodec alac_decoder;
2254 extern AVCodec ws_snd1_decoder;
2255 extern AVCodec indeo2_decoder;
2256 extern AVCodec vorbis_decoder;
2257 extern AVCodec fraps_decoder;
2258 extern AVCodec libgsm_encoder;
2259 extern AVCodec libgsm_decoder;
2260 extern AVCodec bmp_decoder;
2261 extern AVCodec mmvideo_decoder;
2262 extern AVCodec zmbv_decoder;
2263 extern AVCodec avs_decoder;
2264 extern AVCodec smacker_decoder;
2265 extern AVCodec smackaud_decoder;
2266 extern AVCodec kmvc_decoder;
2267 extern AVCodec flashsv_decoder;
2268 extern AVCodec cavs_decoder;
2269 extern AVCodec vmnc_decoder;
2272 #define PCM_CODEC(id, name) \
2273 extern AVCodec name ## _decoder; \
2274 extern AVCodec name ## _encoder
2276 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2277 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2278 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2279 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2280 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2281 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2282 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2283 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2284 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2285 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2286 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2287 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2288 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2289 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2290 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2291 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2292 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2296 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2297 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2298 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2299 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2300 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2301 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2302 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2303 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2304 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2305 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2306 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2307 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2308 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2309 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2310 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2311 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2312 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2313 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2317 /* dummy raw video codec */
2318 extern AVCodec rawvideo_encoder;
2319 extern AVCodec rawvideo_decoder;
2321 /* the following codecs use external GPL libs */
2322 extern AVCodec ac3_decoder;
2323 extern AVCodec dts_decoder;
2326 extern AVCodec dvdsub_encoder;
2327 extern AVCodec dvdsub_decoder;
2328 extern AVCodec dvbsub_encoder;
2329 extern AVCodec dvbsub_decoder;
2333 struct ReSampleContext;
2334 struct AVResampleContext;
2336 typedef struct ReSampleContext ReSampleContext;
2338 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2339 int output_rate, int input_rate);
2340 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2341 void audio_resample_close(ReSampleContext *s);
2343 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2344 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2345 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2346 void av_resample_close(struct AVResampleContext *c);
2348 /* YUV420 format is assumed ! */
2350 struct ImgReSampleContext;
2352 typedef struct ImgReSampleContext ImgReSampleContext;
2354 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2355 int input_width, int input_height);
2357 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2358 int iwidth, int iheight,
2359 int topBand, int bottomBand,
2360 int leftBand, int rightBand,
2361 int padtop, int padbottom,
2362 int padleft, int padright);
2365 void img_resample(ImgReSampleContext *s,
2366 AVPicture *output, const AVPicture *input);
2368 void img_resample_close(ImgReSampleContext *s);
2371 * Allocate memory for a picture. Call avpicture_free to free it.
2373 * @param picture the picture to be filled in.
2374 * @param pix_fmt the format of the picture.
2375 * @param width the width of the picture.
2376 * @param height the height of the picture.
2377 * @return 0 if successful, -1 if not.
2379 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2381 /* Free a picture previously allocated by avpicture_alloc. */
2382 void avpicture_free(AVPicture *picture);
2384 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2385 int pix_fmt, int width, int height);
2386 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2387 unsigned char *dest, int dest_size);
2388 int avpicture_get_size(int pix_fmt, int width, int height);
2389 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2390 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2391 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2392 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2393 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2395 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2396 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2397 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2398 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2399 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2400 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2402 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2404 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2405 int has_alpha, int *loss_ptr);
2407 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2408 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2409 int img_get_alpha_info(const AVPicture *src,
2410 int pix_fmt, int width, int height);
2412 /* convert among pixel formats */
2413 int img_convert(AVPicture *dst, int dst_pix_fmt,
2414 const AVPicture *src, int pix_fmt,
2415 int width, int height);
2417 /* deinterlace a picture */
2418 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2419 int pix_fmt, int width, int height);
2421 /* external high level API */
2423 extern AVCodec *first_avcodec;
2425 /* returns LIBAVCODEC_VERSION_INT constant */
2426 unsigned avcodec_version(void);
2427 /* returns LIBAVCODEC_BUILD constant */
2428 unsigned avcodec_build(void);
2429 void avcodec_init(void);
2431 void register_avcodec(AVCodec *format);
2432 AVCodec *avcodec_find_encoder(enum CodecID id);
2433 AVCodec *avcodec_find_encoder_by_name(const char *name);
2434 AVCodec *avcodec_find_decoder(enum CodecID id);
2435 AVCodec *avcodec_find_decoder_by_name(const char *name);
2436 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2438 void avcodec_get_context_defaults(AVCodecContext *s);
2439 AVCodecContext *avcodec_alloc_context(void);
2440 void avcodec_get_frame_defaults(AVFrame *pic);
2441 AVFrame *avcodec_alloc_frame(void);
2443 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2444 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2445 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2446 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2447 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2448 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2450 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2451 void avcodec_thread_free(AVCodecContext *s);
2452 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2453 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2454 //FIXME func typedef
2457 * opens / inits the AVCodecContext.
2460 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2463 * Decode an audio frame.
2465 * @param avctx the codec context.
2466 * @param samples output buffer, 16 byte aligned
2467 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2468 * @param buf input buffer, 16 byte aligned
2469 * @param buf_size the input buffer size
2470 * @return 0 if successful, -1 if not.
2473 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2474 int *frame_size_ptr,
2475 uint8_t *buf, int buf_size);
2476 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2477 int *got_picture_ptr,
2478 uint8_t *buf, int buf_size);
2479 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2481 const uint8_t *buf, int buf_size);
2482 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2484 uint8_t *buf, int buf_size);
2485 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2486 const short *samples);
2487 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2488 const AVFrame *pict);
2489 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2490 const AVSubtitle *sub);
2492 int avcodec_close(AVCodecContext *avctx);
2494 void avcodec_register_all(void);
2496 void avcodec_flush_buffers(AVCodecContext *avctx);
2498 void avcodec_default_free_buffers(AVCodecContext *s);
2500 /* misc usefull functions */
2503 * returns a single letter to describe the picture type
2505 char av_get_pict_type_char(int pict_type);
2508 * returns codec bits per sample
2510 int av_get_bits_per_sample(enum CodecID codec_id);
2513 typedef struct AVCodecParserContext {
2515 struct AVCodecParser *parser;
2516 int64_t frame_offset; /* offset of the current frame */
2517 int64_t cur_offset; /* current offset
2518 (incremented by each av_parser_parse()) */
2519 int64_t last_frame_offset; /* offset of the last frame */
2521 int pict_type; /* XXX: put it back in AVCodecContext */
2522 int repeat_pict; /* XXX: put it back in AVCodecContext */
2523 int64_t pts; /* pts of the current frame */
2524 int64_t dts; /* dts of the current frame */
2529 int fetch_timestamp;
2531 #define AV_PARSER_PTS_NB 4
2532 int cur_frame_start_index;
2533 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2534 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2535 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2538 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2539 } AVCodecParserContext;
2541 typedef struct AVCodecParser {
2542 int codec_ids[5]; /* several codec IDs are permitted */
2544 int (*parser_init)(AVCodecParserContext *s);
2545 int (*parser_parse)(AVCodecParserContext *s,
2546 AVCodecContext *avctx,
2547 uint8_t **poutbuf, int *poutbuf_size,
2548 const uint8_t *buf, int buf_size);
2549 void (*parser_close)(AVCodecParserContext *s);
2550 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2551 struct AVCodecParser *next;
2554 extern AVCodecParser *av_first_parser;
2556 void av_register_codec_parser(AVCodecParser *parser);
2557 AVCodecParserContext *av_parser_init(int codec_id);
2558 int av_parser_parse(AVCodecParserContext *s,
2559 AVCodecContext *avctx,
2560 uint8_t **poutbuf, int *poutbuf_size,
2561 const uint8_t *buf, int buf_size,
2562 int64_t pts, int64_t dts);
2563 int av_parser_change(AVCodecParserContext *s,
2564 AVCodecContext *avctx,
2565 uint8_t **poutbuf, int *poutbuf_size,
2566 const uint8_t *buf, int buf_size, int keyframe);
2567 void av_parser_close(AVCodecParserContext *s);
2569 extern AVCodecParser mpegvideo_parser;
2570 extern AVCodecParser mpeg4video_parser;
2571 extern AVCodecParser cavsvideo_parser;
2572 extern AVCodecParser h261_parser;
2573 extern AVCodecParser h263_parser;
2574 extern AVCodecParser h264_parser;
2575 extern AVCodecParser mjpeg_parser;
2576 extern AVCodecParser pnm_parser;
2577 extern AVCodecParser mpegaudio_parser;
2578 extern AVCodecParser ac3_parser;
2579 extern AVCodecParser dvdsub_parser;
2580 extern AVCodecParser dvbsub_parser;
2581 extern AVCodecParser aac_parser;
2584 typedef struct AVBitStreamFilterContext {
2586 struct AVBitStreamFilter *filter;
2587 AVCodecParserContext *parser;
2588 struct AVBitStreamFilterContext *next;
2589 } AVBitStreamFilterContext;
2592 typedef struct AVBitStreamFilter {
2595 int (*filter)(AVBitStreamFilterContext *bsfc,
2596 AVCodecContext *avctx, const char *args,
2597 uint8_t **poutbuf, int *poutbuf_size,
2598 const uint8_t *buf, int buf_size, int keyframe);
2599 struct AVBitStreamFilter *next;
2600 } AVBitStreamFilter;
2602 extern AVBitStreamFilter *av_first_bitstream_filter;
2604 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2605 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2606 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2607 AVCodecContext *avctx, const char *args,
2608 uint8_t **poutbuf, int *poutbuf_size,
2609 const uint8_t *buf, int buf_size, int keyframe);
2610 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2612 extern AVBitStreamFilter dump_extradata_bsf;
2613 extern AVBitStreamFilter remove_extradata_bsf;
2614 extern AVBitStreamFilter noise_bsf;
2618 void *av_mallocz(unsigned int size);
2619 char *av_strdup(const char *s);
2620 void av_freep(void *ptr);
2621 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2622 /* for static data only */
2623 /* call av_free_static to release all staticaly allocated tables */
2624 void av_free_static(void);
2625 void *av_mallocz_static(unsigned int size);
2626 void *av_realloc_static(void *ptr, unsigned int size);
2628 void img_copy(AVPicture *dst, const AVPicture *src,
2629 int pix_fmt, int width, int height);
2631 int img_crop(AVPicture *dst, const AVPicture *src,
2632 int pix_fmt, int top_band, int left_band);
2634 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2635 int padtop, int padbottom, int padleft, int padright, int *color);
2638 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2639 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2640 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2641 (((uint8_t*)(x))[1] << 16) | \
2642 (((uint8_t*)(x))[2] << 8) | \
2644 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2645 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2646 (((uint8_t*)(x))[2] << 16) | \
2647 (((uint8_t*)(x))[1] << 8) | \
2651 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2657 #endif /* AVCODEC_H */