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)+(11<<8)+0)
21 #define LIBAVCODEC_VERSION 51.11.0
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,
123 /* various pcm "codecs" */
124 CODEC_ID_PCM_S16LE= 0x10000,
140 CODEC_ID_PCM_S24DAUD,
142 /* various adpcm codecs */
143 CODEC_ID_ADPCM_IMA_QT= 0x11000,
144 CODEC_ID_ADPCM_IMA_WAV,
145 CODEC_ID_ADPCM_IMA_DK3,
146 CODEC_ID_ADPCM_IMA_DK4,
147 CODEC_ID_ADPCM_IMA_WS,
148 CODEC_ID_ADPCM_IMA_SMJPEG,
157 CODEC_ID_ADPCM_YAMAHA,
158 CODEC_ID_ADPCM_SBPRO_4,
159 CODEC_ID_ADPCM_SBPRO_3,
160 CODEC_ID_ADPCM_SBPRO_2,
163 CODEC_ID_AMR_NB= 0x12000,
166 /* RealAudio codecs*/
167 CODEC_ID_RA_144= 0x13000,
170 /* various DPCM codecs */
171 CODEC_ID_ROQ_DPCM= 0x14000,
172 CODEC_ID_INTERPLAY_DPCM,
176 CODEC_ID_MP2= 0x15000,
177 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
196 CODEC_ID_WESTWOOD_SND1,
204 /* subtitle codecs */
205 CODEC_ID_DVD_SUBTITLE= 0x17000,
206 CODEC_ID_DVB_SUBTITLE,
208 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
209 stream (only used by libavformat) */
212 /* CODEC_ID_MP3LAME is absolete */
213 #define CODEC_ID_MP3LAME CODEC_ID_MP3
216 CODEC_TYPE_UNKNOWN = -1,
223 /* currently unused, may be used if 24/32 bits samples ever supported */
224 /* all in native endian */
226 SAMPLE_FMT_NONE = -1,
227 SAMPLE_FMT_U8, ///< unsigned 8 bits
228 SAMPLE_FMT_S16, ///< signed 16 bits
229 SAMPLE_FMT_S24, ///< signed 24 bits
230 SAMPLE_FMT_S32, ///< signed 32 bits
231 SAMPLE_FMT_FLT, ///< float
235 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
238 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
239 * this is mainly needed because some optimized bitstream readers read
240 * 32 or 64 bit at once and could read over the end<br>
241 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
242 * MPEG bitstreams could cause overread and segfault
244 #define FF_INPUT_BUFFER_PADDING_SIZE 8
247 * minimum encoding buffer size.
248 * used to avoid some checks during header writing
250 #define FF_MIN_BUFFER_SIZE 16384
252 /* motion estimation type, EPZS by default */
266 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
267 AVDISCARD_NONE =-16, ///< discard nothing
268 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
269 AVDISCARD_NONREF = 8, ///< discard all non reference
270 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
271 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
272 AVDISCARD_ALL = 48, ///< discard all
275 typedef struct RcOverride{
278 int qscale; // if this is 0 then quality_factor will be used instead
279 float quality_factor;
282 #define FF_MAX_B_FRAMES 16
285 these flags can be passed in AVCodecContext.flags before initing
286 Note: not everything is supported yet.
289 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
290 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
291 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
292 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
293 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
294 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
295 /* parent program gurantees that the input for b-frame containing streams is not written to
296 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
297 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
298 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
299 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
300 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
301 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
302 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
303 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
304 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
305 of only at frame boundaries */
306 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
307 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
308 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
309 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
310 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
311 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
312 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
313 /* Fx : Flag for h263+ extra options */
314 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
315 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
316 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
317 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
318 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
319 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
320 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
321 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
322 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
323 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
324 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
325 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
326 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
327 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
328 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
329 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
330 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
331 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
332 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
333 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
334 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
335 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
336 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
337 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
338 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
340 /* Unsupported options :
341 * Syntax Arithmetic coding (SAC)
342 * Reference Picture Selection
343 * Independant Segment Decoding */
345 /* codec capabilities */
347 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
349 * Codec uses get_buffer() for allocating buffers.
350 * direct rendering method 1
352 #define CODEC_CAP_DR1 0x0002
353 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
355 #define CODEC_CAP_PARSE_ONLY 0x0004
356 #define CODEC_CAP_TRUNCATED 0x0008
357 /* codec can export data for HW decoding (XvMC) */
358 #define CODEC_CAP_HWACCEL 0x0010
360 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
361 * if this is not set, the codec is guranteed to never be feeded with NULL data
363 #define CODEC_CAP_DELAY 0x0020
365 * Codec can be fed a final frame with a smaller size.
366 * This can be used to prevent truncation of the last audio samples.
368 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
370 //the following defines may change, don't expect compatibility if you use them
371 #define MB_TYPE_INTRA4x4 0x0001
372 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
373 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
374 #define MB_TYPE_16x16 0x0008
375 #define MB_TYPE_16x8 0x0010
376 #define MB_TYPE_8x16 0x0020
377 #define MB_TYPE_8x8 0x0040
378 #define MB_TYPE_INTERLACED 0x0080
379 #define MB_TYPE_DIRECT2 0x0100 //FIXME
380 #define MB_TYPE_ACPRED 0x0200
381 #define MB_TYPE_GMC 0x0400
382 #define MB_TYPE_SKIP 0x0800
383 #define MB_TYPE_P0L0 0x1000
384 #define MB_TYPE_P1L0 0x2000
385 #define MB_TYPE_P0L1 0x4000
386 #define MB_TYPE_P1L1 0x8000
387 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
388 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
389 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
390 #define MB_TYPE_QUANT 0x00010000
391 #define MB_TYPE_CBP 0x00020000
392 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
396 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
398 typedef struct AVPanScan{
401 * - encoding: set by user.
402 * - decoding: set by lavc
407 * width and height in 1/16 pel
408 * - encoding: set by user.
409 * - decoding: set by lavc
415 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
416 * - encoding: set by user.
417 * - decoding: set by lavc
419 int16_t position[3][2];
422 #define FF_COMMON_FRAME \
424 * pointer to the picture planes.\
425 * this might be different from the first allocated byte\
432 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
433 * this isn't used by lavc unless the default get/release_buffer() is used\
439 * 1 -> keyframe, 0-> not\
440 * - encoding: set by lavc\
441 * - decoding: set by lavc\
446 * picture type of the frame, see ?_TYPE below.\
447 * - encoding: set by lavc for coded_picture (and set by user for input)\
448 * - decoding: set by lavc\
453 * presentation timestamp in time_base units (time when frame should be shown to user)\
454 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
455 * - encoding: MUST be set by user\
456 * - decoding: set by lavc\
461 * picture number in bitstream order.\
462 * - encoding: set by\
463 * - decoding: set by lavc\
465 int coded_picture_number;\
467 * picture number in display order.\
468 * - encoding: set by\
469 * - decoding: set by lavc\
471 int display_picture_number;\
474 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
475 * - encoding: set by lavc for coded_picture (and set by user for input)\
476 * - decoding: set by lavc\
481 * buffer age (1->was last buffer and dint change, 2->..., ...).\
482 * set to INT_MAX if the buffer has not been used yet \
483 * - encoding: unused\
484 * - decoding: MUST be set by get_buffer()\
489 * is this picture used as reference\
490 * - encoding: unused\
491 * - decoding: set by lavc (before get_buffer() call))\
497 * - encoding: unused\
498 * - decoding: set by lavc\
500 int8_t *qscale_table;\
503 * - encoding: unused\
504 * - decoding: set by lavc\
509 * mbskip_table[mb]>=1 if MB didnt change\
510 * stride= mb_width = (width+15)>>4\
511 * - encoding: unused\
512 * - decoding: set by lavc\
514 uint8_t *mbskip_table;\
517 * Motion vector table.\
520 * int mv_sample_log2= 4 - motion_subsample_log2;\
521 * int mb_width= (width+15)>>4;\
522 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
523 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
525 * - encoding: set by user\
526 * - decoding: set by lavc\
528 int16_t (*motion_val[2])[2];\
531 * Macroblock type table\
532 * mb_type_base + mb_width + 2\
533 * - encoding: set by user\
534 * - decoding: set by lavc\
539 * log2 of the size of the block which a single vector in motion_val represents: \
540 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
541 * - encoding: unused\
542 * - decoding: set by lavc\
544 uint8_t motion_subsample_log2;\
547 * for some private data of the user\
548 * - encoding: unused\
549 * - decoding: set by user\
555 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
556 * - decoding: unused\
561 * type of the buffer (to keep track of who has to dealloc data[*])\
562 * - encoding: set by the one who allocs it\
563 * - decoding: set by the one who allocs it\
564 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
569 * when decoding, this signal how much the picture must be delayed.\
570 * extra_delay = repeat_pict / (2*fps)\
571 * - encoding: unused\
572 * - decoding: set by lavc\
582 * The content of the picture is interlaced.\
583 * - encoding: set by user\
584 * - decoding: set by lavc (default 0)\
586 int interlaced_frame;\
589 * if the content is interlaced, is top field displayed first.\
590 * - encoding: set by user\
591 * - decoding: set by lavc\
593 int top_field_first;\
597 * - encoding: set by user\
598 * - decoding: set by lavc\
600 AVPanScan *pan_scan;\
603 * tell user application that palette has changed from previous frame.\
604 * - encoding: ??? (no palette-enabled encoder yet)\
605 * - decoding: set by lavc (default 0)\
607 int palette_has_changed;\
610 * Codec suggestion on buffer type if != 0\
611 * - encoding: unused\
612 * - decoding: set by lavc (before get_buffer() call))\
618 * - encoding: unused\
619 * - decoding: set by lavc\
624 * Motion referece frame index\
625 * - encoding: set by user\
626 * - decoding: set by lavc\
628 int8_t *ref_index[2];
630 #define FF_QSCALE_TYPE_MPEG1 0
631 #define FF_QSCALE_TYPE_MPEG2 1
632 #define FF_QSCALE_TYPE_H264 2
634 #define FF_BUFFER_TYPE_INTERNAL 1
635 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
636 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
637 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
640 #define FF_I_TYPE 1 // Intra
641 #define FF_P_TYPE 2 // Predicted
642 #define FF_B_TYPE 3 // Bi-dir predicted
643 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
647 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
648 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
649 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
650 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
655 typedef struct AVFrame {
659 #define DEFAULT_FRAME_RATE_BASE 1001000
662 * main external api structure.
664 typedef struct AVCodecContext {
666 * Info on struct for av_log
667 * - set by avcodec_alloc_context
671 * the average bitrate.
672 * - encoding: set by user. unused for constant quantizer encoding
673 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
678 * number of bits the bitstream is allowed to diverge from the reference.
679 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
680 * - encoding: set by user. unused for constant quantizer encoding
683 int bit_rate_tolerance;
687 * - encoding: set by user.
688 * - decoding: set by user.
693 * some codecs needs additionnal format info. It is stored here
694 * - encoding: set by user.
695 * - decoding: set by lavc. (FIXME is this ok?)
700 * motion estimation algorithm used for video coding.
701 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
702 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
703 * - encoding: MUST be set by user.
709 * some codecs need / can use extra-data like huffman tables.
710 * mjpeg: huffman tables
711 * rv10: additional flags
712 * mpeg4: global headers (they can be in the bitstream or here)
713 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
714 * then extradata_size to avoid prolems if its read with the bitstream reader
715 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
716 * - encoding: set/allocated/freed by lavc.
717 * - decoding: set/allocated/freed by user.
723 * this is the fundamental unit of time (in seconds) in terms
724 * of which frame timestamps are represented. for fixed-fps content,
725 * timebase should be 1/framerate and timestamp increments should be
727 * - encoding: MUST be set by user
728 * - decoding: set by lavc.
730 AVRational time_base;
734 * picture width / height.
735 * - encoding: MUST be set by user.
736 * - decoding: set by lavc.
737 * Note, for compatibility its possible to set this instead of
738 * coded_width/height before decoding
742 #define FF_ASPECT_EXTENDED 15
745 * the number of pictures in a group of pitures, or 0 for intra_only.
746 * - encoding: set by user.
752 * pixel format, see PIX_FMT_xxx.
753 * - encoding: set by user.
754 * - decoding: set by lavc.
756 enum PixelFormat pix_fmt;
759 * Frame rate emulation. If not zero lower layer (i.e. format handler)
760 * has to read frames at native frame rate.
761 * - encoding: set by user.
762 * - decoding: unused.
767 * if non NULL, 'draw_horiz_band' is called by the libavcodec
768 * decoder to draw an horizontal band. It improve cache usage. Not
769 * all codecs can do that. You must check the codec capabilities
772 * - decoding: set by user.
773 * @param height the height of the slice
774 * @param y the y position of the slice
775 * @param type 1->top field, 2->bottom field, 3->frame
776 * @param offset offset into the AVFrame.data from which the slice should be read
778 void (*draw_horiz_band)(struct AVCodecContext *s,
779 const AVFrame *src, int offset[4],
780 int y, int type, int height);
783 int sample_rate; ///< samples per sec
787 * audio sample format.
788 * - encoding: set by user.
789 * - decoding: set by lavc.
791 enum SampleFormat sample_fmt; ///< sample format, currenly unused
793 /* the following data should not be initialized */
795 * samples per packet. initialized when calling 'init'
798 int frame_number; ///< audio or video frame number
799 int real_pict_num; ///< returns the real picture number of previous encoded frame
802 * number of frames the decoded output will be delayed relative to
804 * - encoding: set by lavc.
809 /* - encoding parameters */
810 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
811 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
815 * - encoding: set by user.
822 * - encoding: set by user.
828 * maximum quantizer difference etween frames.
829 * - encoding: set by user.
835 * maximum number of b frames between non b frames.
836 * note: the output will be delayed by max_b_frames+1 relative to the input
837 * - encoding: set by user.
843 * qscale factor between ip and b frames.
844 * - encoding: set by user.
847 float b_quant_factor;
849 /** obsolete FIXME remove */
851 #define FF_RC_STRATEGY_XVID 1
853 int b_frame_strategy;
857 * deprecated in favor of skip_idct and skip_frame
859 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
863 struct AVCodec *codec;
867 /* unused, FIXME remove*/
870 int rtp_payload_size; /* The size of the RTP payload: the coder will */
871 /* do it's best to deliver a chunk with size */
872 /* below rtp_payload_size, the chunk will start */
873 /* with a start code on some codecs like H.263 */
874 /* This doesn't take account of any particular */
875 /* headers inside the transmited RTP payload */
878 /* The RTP callback: This function is called */
879 /* every time the encoder has a packet to send */
880 /* Depends on the encoder if the data starts */
881 /* with a Start Code (it should) H.263 does. */
882 /* mb_nb contains the number of macroblocks */
883 /* encoded in the RTP payload */
884 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
886 /* statistics, used for 2-pass encoding */
897 * number of bits used for the previously encoded frame.
898 * - encoding: set by lavc
904 * private data of the user, can be used to carry app specific stuff.
905 * - encoding: set by user
906 * - decoding: set by user
911 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
912 enum CodecID codec_id; /* see CODEC_ID_xxx */
915 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
916 * this is used to workaround some encoder bugs
917 * - encoding: set by user, if not then the default based on codec_id will be used
918 * - decoding: set by user, will be converted to upper case by lavc during init
920 unsigned int codec_tag;
923 * workaround bugs in encoders which sometimes cannot be detected automatically.
924 * - encoding: set by user
925 * - decoding: set by user
928 #define FF_BUG_AUTODETECT 1 ///< autodetection
929 #define FF_BUG_OLD_MSMPEG4 2
930 #define FF_BUG_XVID_ILACE 4
931 #define FF_BUG_UMP4 8
932 #define FF_BUG_NO_PADDING 16
933 #define FF_BUG_AMV 32
934 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
935 #define FF_BUG_QPEL_CHROMA 64
936 #define FF_BUG_STD_QPEL 128
937 #define FF_BUG_QPEL_CHROMA2 256
938 #define FF_BUG_DIRECT_BLOCKSIZE 512
939 #define FF_BUG_EDGE 1024
940 #define FF_BUG_HPEL_CHROMA 2048
941 #define FF_BUG_DC_CLIP 4096
942 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
943 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
946 * luma single coeff elimination threshold.
947 * - encoding: set by user
950 int luma_elim_threshold;
953 * chroma single coeff elimination threshold.
954 * - encoding: set by user
957 int chroma_elim_threshold;
960 * strictly follow the std (MPEG4, ...).
961 * - encoding: set by user
964 int strict_std_compliance;
965 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
966 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
967 #define FF_COMPLIANCE_NORMAL 0
968 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
969 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
972 * qscale offset between ip and b frames.
973 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
974 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
975 * - encoding: set by user.
978 float b_quant_offset;
981 * error resilience higher values will detect more errors but may missdetect
982 * some more or less valid parts as errors.
984 * - decoding: set by user
986 int error_resilience;
987 #define FF_ER_CAREFUL 1
988 #define FF_ER_COMPLIANT 2
989 #define FF_ER_AGGRESSIVE 3
990 #define FF_ER_VERY_AGGRESSIVE 4
993 * called at the beginning of each frame to get a buffer for it.
994 * if pic.reference is set then the frame will be read later by lavc
995 * avcodec_align_dimensions() should be used to find the required width and
996 * height, as they normally need to be rounded up to the next multiple of 16
998 * - decoding: set by lavc, user can override
1000 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1003 * called to release buffers which where allocated with get_buffer.
1004 * a released buffer can be reused in get_buffer()
1005 * pic.data[*] must be set to NULL
1006 * - encoding: unused
1007 * - decoding: set by lavc, user can override
1009 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1012 * if 1 the stream has a 1 frame delay during decoding.
1013 * - encoding: set by lavc
1014 * - decoding: set by lavc
1019 * number of bytes per packet if constant and known or 0
1020 * used by some WAV based audio codecs
1024 int parse_only; /* - decoding only: if true, only parsing is done
1025 (function avcodec_parse_frame()). The frame
1026 data is returned. Only MPEG codecs support this now. */
1029 * 0-> h263 quant 1-> mpeg quant.
1030 * - encoding: set by user.
1031 * - decoding: unused
1036 * pass1 encoding statistics output buffer.
1037 * - encoding: set by lavc
1038 * - decoding: unused
1043 * pass2 encoding statistics input buffer.
1044 * concatenated stuff from stats_out of pass1 should be placed here
1045 * - encoding: allocated/set/freed by user
1046 * - decoding: unused
1051 * ratecontrol qmin qmax limiting method.
1052 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1053 * - encoding: set by user.
1054 * - decoding: unused
1062 * ratecontrol override, see RcOverride.
1063 * - encoding: allocated/set/freed by user.
1064 * - decoding: unused
1066 RcOverride *rc_override;
1067 int rc_override_count;
1070 * rate control equation.
1071 * - encoding: set by user
1072 * - decoding: unused
1078 * - encoding: set by user.
1079 * - decoding: unused
1085 * - encoding: set by user.
1086 * - decoding: unused
1091 * decoder bitstream buffer size.
1092 * - encoding: set by user.
1093 * - decoding: unused
1096 float rc_buffer_aggressivity;
1099 * qscale factor between p and i frames.
1100 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1101 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1102 * - encoding: set by user.
1103 * - decoding: unused
1105 float i_quant_factor;
1108 * qscale offset between p and i frames.
1109 * - encoding: set by user.
1110 * - decoding: unused
1112 float i_quant_offset;
1115 * initial complexity for pass1 ratecontrol.
1116 * - encoding: set by user.
1117 * - decoding: unused
1119 float rc_initial_cplx;
1122 * dct algorithm, see FF_DCT_* below.
1123 * - encoding: set by user
1124 * - decoding: unused
1127 #define FF_DCT_AUTO 0
1128 #define FF_DCT_FASTINT 1
1129 #define FF_DCT_INT 2
1130 #define FF_DCT_MMX 3
1131 #define FF_DCT_MLIB 4
1132 #define FF_DCT_ALTIVEC 5
1133 #define FF_DCT_FAAN 6
1136 * luminance masking (0-> disabled).
1137 * - encoding: set by user
1138 * - decoding: unused
1143 * temporary complexity masking (0-> disabled).
1144 * - encoding: set by user
1145 * - decoding: unused
1147 float temporal_cplx_masking;
1150 * spatial complexity masking (0-> disabled).
1151 * - encoding: set by user
1152 * - decoding: unused
1154 float spatial_cplx_masking;
1157 * p block masking (0-> disabled).
1158 * - encoding: set by user
1159 * - decoding: unused
1164 * darkness masking (0-> disabled).
1165 * - encoding: set by user
1166 * - decoding: unused
1171 /* for binary compatibility */
1175 * idct algorithm, see FF_IDCT_* below.
1176 * - encoding: set by user
1177 * - decoding: set by user
1180 #define FF_IDCT_AUTO 0
1181 #define FF_IDCT_INT 1
1182 #define FF_IDCT_SIMPLE 2
1183 #define FF_IDCT_SIMPLEMMX 3
1184 #define FF_IDCT_LIBMPEG2MMX 4
1185 #define FF_IDCT_PS2 5
1186 #define FF_IDCT_MLIB 6
1187 #define FF_IDCT_ARM 7
1188 #define FF_IDCT_ALTIVEC 8
1189 #define FF_IDCT_SH4 9
1190 #define FF_IDCT_SIMPLEARM 10
1191 #define FF_IDCT_H264 11
1192 #define FF_IDCT_VP3 12
1193 #define FF_IDCT_IPP 13
1194 #define FF_IDCT_XVIDMMX 14
1195 #define FF_IDCT_CAVS 15
1199 * - encoding: set by lavc
1200 * - decoding: set by user (or 0)
1204 * slice offsets in the frame in bytes.
1205 * - encoding: set/allocated by lavc
1206 * - decoding: set/allocated by user (or NULL)
1211 * error concealment flags.
1212 * - encoding: unused
1213 * - decoding: set by user
1215 int error_concealment;
1216 #define FF_EC_GUESS_MVS 1
1217 #define FF_EC_DEBLOCK 2
1220 * dsp_mask could be add used to disable unwanted CPU features
1221 * CPU features (i.e. MMX, SSE. ...)
1223 * with FORCE flag you may instead enable given CPU features
1224 * (Dangerous: usable in case of misdetection, improper usage however will
1225 * result into program crash)
1228 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1229 /* lower 16 bits - CPU features */
1231 #define FF_MM_MMX 0x0001 /* standard MMX */
1232 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1233 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1234 #define FF_MM_SSE 0x0008 /* SSE functions */
1235 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1236 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1237 #endif /* HAVE_MMX */
1239 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1240 #endif /* HAVE_IWMMXT */
1243 * bits per sample/pixel from the demuxer (needed for huffyuv).
1244 * - encoding: set by lavc
1245 * - decoding: set by user
1247 int bits_per_sample;
1250 * prediction method (needed for huffyuv).
1251 * - encoding: set by user
1252 * - decoding: unused
1254 int prediction_method;
1255 #define FF_PRED_LEFT 0
1256 #define FF_PRED_PLANE 1
1257 #define FF_PRED_MEDIAN 2
1260 * sample aspect ratio (0 if unknown).
1261 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1262 * - encoding: set by user.
1263 * - decoding: set by lavc.
1265 AVRational sample_aspect_ratio;
1268 * the picture in the bitstream.
1269 * - encoding: set by lavc
1270 * - decoding: set by lavc
1272 AVFrame *coded_frame;
1276 * - encoding: set by user.
1277 * - decoding: set by user.
1280 #define FF_DEBUG_PICT_INFO 1
1281 #define FF_DEBUG_RC 2
1282 #define FF_DEBUG_BITSTREAM 4
1283 #define FF_DEBUG_MB_TYPE 8
1284 #define FF_DEBUG_QP 16
1285 #define FF_DEBUG_MV 32
1286 #define FF_DEBUG_DCT_COEFF 0x00000040
1287 #define FF_DEBUG_SKIP 0x00000080
1288 #define FF_DEBUG_STARTCODE 0x00000100
1289 #define FF_DEBUG_PTS 0x00000200
1290 #define FF_DEBUG_ER 0x00000400
1291 #define FF_DEBUG_MMCO 0x00000800
1292 #define FF_DEBUG_BUGS 0x00001000
1293 #define FF_DEBUG_VIS_QP 0x00002000
1294 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1298 * - encoding: set by user.
1299 * - decoding: set by user.
1302 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1303 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1304 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1308 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1309 * - decoding: unused
1314 * minimum MB quantizer.
1315 * - encoding: unused
1316 * - decoding: unused
1321 * maximum MB quantizer.
1322 * - encoding: unused
1323 * - decoding: unused
1328 * motion estimation compare function.
1329 * - encoding: set by user.
1330 * - decoding: unused
1334 * subpixel motion estimation compare function.
1335 * - encoding: set by user.
1336 * - decoding: unused
1340 * macroblock compare function (not supported yet).
1341 * - encoding: set by user.
1342 * - decoding: unused
1346 * interlaced dct compare function
1347 * - encoding: set by user.
1348 * - decoding: unused
1351 #define FF_CMP_SAD 0
1352 #define FF_CMP_SSE 1
1353 #define FF_CMP_SATD 2
1354 #define FF_CMP_DCT 3
1355 #define FF_CMP_PSNR 4
1356 #define FF_CMP_BIT 5
1358 #define FF_CMP_ZERO 7
1359 #define FF_CMP_VSAD 8
1360 #define FF_CMP_VSSE 9
1361 #define FF_CMP_NSSE 10
1362 #define FF_CMP_W53 11
1363 #define FF_CMP_W97 12
1364 #define FF_CMP_DCTMAX 13
1365 #define FF_CMP_DCT264 14
1366 #define FF_CMP_CHROMA 256
1369 * ME diamond size & shape.
1370 * - encoding: set by user.
1371 * - decoding: unused
1376 * amount of previous MV predictors (2a+1 x 2a+1 square).
1377 * - encoding: set by user.
1378 * - decoding: unused
1380 int last_predictor_count;
1383 * pre pass for motion estimation.
1384 * - encoding: set by user.
1385 * - decoding: unused
1390 * motion estimation pre pass compare function.
1391 * - encoding: set by user.
1392 * - decoding: unused
1397 * ME pre pass diamond size & shape.
1398 * - encoding: set by user.
1399 * - decoding: unused
1404 * subpel ME quality.
1405 * - encoding: set by user.
1406 * - decoding: unused
1408 int me_subpel_quality;
1411 * callback to negotiate the pixelFormat.
1412 * @param fmt is the list of formats which are supported by the codec,
1413 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1414 * the first is allways the native one
1415 * @return the choosen format
1416 * - encoding: unused
1417 * - decoding: set by user, if not set then the native format will always be choosen
1419 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1422 * DTG active format information (additionnal aspect ratio
1423 * information only used in DVB MPEG2 transport streams). 0 if
1426 * - encoding: unused.
1427 * - decoding: set by decoder
1429 int dtg_active_format;
1430 #define FF_DTG_AFD_SAME 8
1431 #define FF_DTG_AFD_4_3 9
1432 #define FF_DTG_AFD_16_9 10
1433 #define FF_DTG_AFD_14_9 11
1434 #define FF_DTG_AFD_4_3_SP_14_9 13
1435 #define FF_DTG_AFD_16_9_SP_14_9 14
1436 #define FF_DTG_AFD_SP_4_3 15
1439 * Maximum motion estimation search range in subpel units.
1440 * if 0 then no limit
1442 * - encoding: set by user.
1443 * - decoding: unused.
1448 * intra quantizer bias.
1449 * - encoding: set by user.
1450 * - decoding: unused
1452 int intra_quant_bias;
1453 #define FF_DEFAULT_QUANT_BIAS 999999
1456 * inter quantizer bias.
1457 * - encoding: set by user.
1458 * - decoding: unused
1460 int inter_quant_bias;
1464 * - encoding: unused.
1465 * - decoding: which clrtable should be used for 8bit RGB images
1466 * table have to be stored somewhere FIXME
1471 * internal_buffer count.
1472 * Don't touch, used by lavc default_get_buffer()
1474 int internal_buffer_count;
1478 * Don't touch, used by lavc default_get_buffer()
1480 void *internal_buffer;
1482 #define FF_LAMBDA_SHIFT 7
1483 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1484 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1485 #define FF_LAMBDA_MAX (256*128-1)
1487 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1489 * global quality for codecs which cannot change it per frame.
1490 * this should be proportional to MPEG1/2/4 qscale.
1491 * - encoding: set by user.
1492 * - decoding: unused
1496 #define FF_CODER_TYPE_VLC 0
1497 #define FF_CODER_TYPE_AC 1
1500 * - encoding: set by user.
1501 * - decoding: unused
1507 * - encoding: set by user.
1508 * - decoding: unused
1514 * - encoding: unused
1515 * - decoding: set by user.
1517 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1522 * - encoding: unused
1523 * - decoding: set by user.
1526 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1527 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1528 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1531 * XVideo Motion Acceleration
1532 * - encoding: forbidden
1533 * - decoding: set by decoder
1535 int xvmc_acceleration;
1538 * macroblock decision mode
1539 * - encoding: set by user.
1540 * - decoding: unused
1543 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1544 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1545 #define FF_MB_DECISION_RD 2 ///< rate distoration
1548 * custom intra quantization matrix
1549 * - encoding: set by user, can be NULL
1550 * - decoding: set by lavc
1552 uint16_t *intra_matrix;
1555 * custom inter quantization matrix
1556 * - encoding: set by user, can be NULL
1557 * - decoding: set by lavc
1559 uint16_t *inter_matrix;
1562 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1563 * this is used to workaround some encoder bugs
1564 * - encoding: unused
1565 * - decoding: set by user, will be converted to upper case by lavc during init
1567 unsigned int stream_codec_tag;
1570 * scene change detection threshold.
1571 * 0 is default, larger means fewer detected scene changes
1572 * - encoding: set by user.
1573 * - decoding: unused
1575 int scenechange_threshold;
1578 * minimum lagrange multipler
1579 * - encoding: set by user.
1580 * - decoding: unused
1585 * maximum lagrange multipler
1586 * - encoding: set by user.
1587 * - decoding: unused
1592 * Palette control structure
1593 * - encoding: ??? (no palette-enabled encoder yet)
1594 * - decoding: set by user.
1596 struct AVPaletteControl *palctrl;
1599 * noise reduction strength
1600 * - encoding: set by user.
1601 * - decoding: unused
1603 int noise_reduction;
1606 * called at the beginning of a frame to get cr buffer for it.
1607 * buffer type (size, hints) must be the same. lavc won't check it.
1608 * lavc will pass previous buffer in pic, function should return
1609 * same buffer or new buffer with old frame "painted" into it.
1610 * if pic.data[0] == NULL must behave like get_buffer().
1611 * - encoding: unused
1612 * - decoding: set by lavc, user can override
1614 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1617 * number of bits which should be loaded into the rc buffer before decoding starts
1618 * - encoding: set by user.
1619 * - decoding: unused
1621 int rc_initial_buffer_occupancy;
1625 * - encoding: set by user.
1626 * - decoding: unused
1628 int inter_threshold;
1632 * - encoding: set by user.
1633 * - decoding: set by user.
1638 * simulates errors in the bitstream to test error concealment.
1639 * - encoding: set by user.
1640 * - decoding: unused.
1645 * MP3 antialias algorithm, see FF_AA_* below.
1646 * - encoding: unused
1647 * - decoding: set by user
1650 #define FF_AA_AUTO 0
1651 #define FF_AA_FASTINT 1 //not implemented yet
1653 #define FF_AA_FLOAT 3
1655 * Quantizer noise shaping.
1656 * - encoding: set by user
1657 * - decoding: unused
1659 int quantizer_noise_shaping;
1663 * is used to decide how many independant tasks should be passed to execute()
1664 * - encoding: set by user
1665 * - decoding: set by user
1670 * the codec may call this to execute several independant things. it will return only after
1671 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1672 * default implementation will execute the parts serially
1673 * @param count the number of things to execute
1674 * - encoding: set by lavc, user can override
1675 * - decoding: set by lavc, user can override
1677 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1681 * can be used by execute() to store some per AVCodecContext stuff.
1682 * - encoding: set by execute()
1683 * - decoding: set by execute()
1685 void *thread_opaque;
1688 * Motion estimation threshold. under which no motion estimation is
1689 * performed, but instead the user specified motion vectors are used
1691 * - encoding: set by user
1692 * - decoding: unused
1697 * Macroblock threshold. under which the user specified macroblock types will be used
1698 * - encoding: set by user
1699 * - decoding: unused
1704 * precision of the intra dc coefficient - 8.
1705 * - encoding: set by user
1706 * - decoding: unused
1708 int intra_dc_precision;
1711 * noise vs. sse weight for the nsse comparsion function.
1712 * - encoding: set by user
1713 * - decoding: unused
1718 * number of macroblock rows at the top which are skipped.
1719 * - encoding: unused
1720 * - decoding: set by user
1725 * number of macroblock rows at the bottom which are skipped.
1726 * - encoding: unused
1727 * - decoding: set by user
1733 * - encoding: set by user
1734 * - decoding: set by lavc
1737 #define FF_PROFILE_UNKNOWN -99
1741 * - encoding: set by user
1742 * - decoding: set by lavc
1745 #define FF_LEVEL_UNKNOWN -99
1748 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1749 * - encoding: unused
1750 * - decoding: set by user
1755 * bitsream width / height. may be different from width/height if lowres
1756 * or other things are used
1757 * - encoding: unused
1758 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1760 int coded_width, coded_height;
1763 * frame skip threshold
1764 * - encoding: set by user
1765 * - decoding: unused
1767 int frame_skip_threshold;
1771 * - encoding: set by user
1772 * - decoding: unused
1774 int frame_skip_factor;
1777 * frame skip exponent
1778 * - encoding: set by user
1779 * - decoding: unused
1784 * frame skip comparission function
1785 * - encoding: set by user.
1786 * - decoding: unused
1791 * border processing masking. raises the quantizer for mbs on the borders
1793 * - encoding: set by user
1794 * - decoding: unused
1796 float border_masking;
1799 * minimum MB lagrange multipler.
1800 * - encoding: set by user.
1801 * - decoding: unused
1806 * maximum MB lagrange multipler.
1807 * - encoding: set by user.
1808 * - decoding: unused
1814 * - encoding: set by user.
1815 * - decoding: unused
1817 int me_penalty_compensation;
1821 * - encoding: unused
1822 * - decoding: set by user.
1824 enum AVDiscard skip_loop_filter;
1828 * - encoding: unused
1829 * - decoding: set by user.
1831 enum AVDiscard skip_idct;
1835 * - encoding: unused
1836 * - decoding: set by user.
1838 enum AVDiscard skip_frame;
1842 * - encoding: set by user.
1843 * - decoding: unused
1849 * - encoding: set by user.
1850 * - decoding: unused
1855 * constant rate factor - quality-based VBR - values ~correspond to qps
1856 * - encoding: set by user.
1857 * - decoding: unused
1862 * constant quantization parameter rate control method
1863 * - encoding: set by user.
1864 * - decoding: unused
1870 * - encoding: set by user.
1871 * - decoding: unused
1876 * number of reference frames
1877 * - encoding: set by user.
1878 * - decoding: unused
1883 * chroma qp offset from luma
1884 * - encoding: set by user.
1885 * - decoding: unused
1890 * influences how often b-frames are used
1891 * - encoding: set by user.
1892 * - decoding: unused
1897 * trellis RD quantization
1898 * - encoding: set by user.
1899 * - decoding: unused
1904 * reduce fluctuations in qp (before curve compression)
1905 * - encoding: set by user.
1906 * - decoding: unused
1908 float complexityblur;
1911 * in-loop deblocking filter alphac0 parameter
1912 * alpha is in the range -6...6
1913 * - encoding: set by user.
1914 * - decoding: unused
1919 * in-loop deblocking filter beta parameter
1920 * beta is in the range -6...6
1921 * - encoding: set by user.
1922 * - decoding: unused
1927 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1928 * - encoding: set by user.
1929 * - decoding: unused
1932 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1933 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1934 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1935 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1936 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1939 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1940 * - encoding: set by user.
1941 * - decoding: unused
1946 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1947 * - encoding: set by user.
1948 * - decoding: unused
1953 * multiplied by qscale for each frame and added to scene_change_score
1954 * - encoding: set by user.
1955 * - decoding: unused
1957 int scenechange_factor;
1961 * note: value depends upon the compare functin used for fullpel ME
1962 * - encoding: set by user.
1963 * - decoding: unused
1968 * adjusts sensitivity of b_frame_strategy 1
1969 * - encoding: set by user.
1970 * - decoding: unused
1975 * - encoding: set by user.
1976 * - decoding: unused
1978 int compression_level;
1979 #define FF_COMPRESSION_DEFAULT -1
1982 * sets whether to use LPC mode - used by FLAC encoder
1983 * - encoding: set by user.
1984 * - decoding: unused.
1989 * LPC coefficient precision - used by FLAC encoder
1990 * - encoding: set by user.
1991 * - decoding: unused.
1993 int lpc_coeff_precision;
1996 * - encoding: set by user.
1997 * - decoding: unused.
1999 int min_prediction_order;
2002 * - encoding: set by user.
2003 * - decoding: unused.
2005 int max_prediction_order;
2008 * search method for selecting prediction order
2009 * - encoding: set by user.
2010 * - decoding: unused.
2012 int prediction_order_method;
2015 * - encoding: set by user.
2016 * - decoding: unused.
2018 int min_partition_order;
2021 * - encoding: set by user.
2022 * - decoding: unused.
2024 int max_partition_order;
2030 typedef struct AVCodec {
2032 enum CodecType type;
2035 int (*init)(AVCodecContext *);
2036 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2037 int (*close)(AVCodecContext *);
2038 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2039 uint8_t *buf, int buf_size);
2041 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2042 void *dummy; // FIXME remove next time we break binary compatibility
2044 struct AVCodec *next;
2045 void (*flush)(AVCodecContext *);
2046 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2047 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2051 * four components are given, that's all.
2052 * the last component is alpha
2054 typedef struct AVPicture {
2056 int linesize[4]; ///< number of bytes per line
2061 * This structure defines a method for communicating palette changes
2062 * between and demuxer and a decoder.
2064 #define AVPALETTE_SIZE 1024
2065 #define AVPALETTE_COUNT 256
2066 typedef struct AVPaletteControl {
2068 /* demuxer sets this to 1 to indicate the palette has changed;
2069 * decoder resets to 0 */
2070 int palette_changed;
2072 /* 4-byte ARGB palette entries, stored in native byte order; note that
2073 * the individual palette components should be on a 8-bit scale; if
2074 * the palette data comes from a IBM VGA native format, the component
2075 * data is probably 6 bits in size and needs to be scaled */
2076 unsigned int palette[AVPALETTE_COUNT];
2080 typedef struct AVSubtitleRect {
2087 uint32_t *rgba_palette;
2091 typedef struct AVSubtitle {
2092 uint16_t format; /* 0 = graphics */
2093 uint32_t start_display_time; /* relative to packet pts, in ms */
2094 uint32_t end_display_time; /* relative to packet pts, in ms */
2096 AVSubtitleRect *rects;
2099 extern AVCodec ac3_encoder;
2100 extern AVCodec mp2_encoder;
2101 extern AVCodec mp3lame_encoder;
2102 extern AVCodec oggvorbis_encoder;
2103 extern AVCodec faac_encoder;
2104 extern AVCodec flac_encoder;
2105 extern AVCodec xvid_encoder;
2106 extern AVCodec mpeg1video_encoder;
2107 extern AVCodec mpeg2video_encoder;
2108 extern AVCodec h261_encoder;
2109 extern AVCodec h263_encoder;
2110 extern AVCodec h263p_encoder;
2111 extern AVCodec flv_encoder;
2112 extern AVCodec rv10_encoder;
2113 extern AVCodec rv20_encoder;
2114 extern AVCodec dvvideo_encoder;
2115 extern AVCodec mjpeg_encoder;
2116 extern AVCodec ljpeg_encoder;
2117 extern AVCodec jpegls_encoder;
2118 extern AVCodec png_encoder;
2119 extern AVCodec ppm_encoder;
2120 extern AVCodec pgm_encoder;
2121 extern AVCodec pgmyuv_encoder;
2122 extern AVCodec pbm_encoder;
2123 extern AVCodec pam_encoder;
2124 extern AVCodec mpeg4_encoder;
2125 extern AVCodec msmpeg4v1_encoder;
2126 extern AVCodec msmpeg4v2_encoder;
2127 extern AVCodec msmpeg4v3_encoder;
2128 extern AVCodec wmv1_encoder;
2129 extern AVCodec wmv2_encoder;
2130 extern AVCodec huffyuv_encoder;
2131 extern AVCodec ffvhuff_encoder;
2132 extern AVCodec h264_encoder;
2133 extern AVCodec asv1_encoder;
2134 extern AVCodec asv2_encoder;
2135 extern AVCodec vcr1_encoder;
2136 extern AVCodec ffv1_encoder;
2137 extern AVCodec snow_encoder;
2138 extern AVCodec mdec_encoder;
2139 extern AVCodec zlib_encoder;
2140 extern AVCodec sonic_encoder;
2141 extern AVCodec sonic_ls_encoder;
2142 extern AVCodec svq1_encoder;
2143 extern AVCodec x264_encoder;
2145 extern AVCodec h263_decoder;
2146 extern AVCodec h261_decoder;
2147 extern AVCodec mpeg4_decoder;
2148 extern AVCodec msmpeg4v1_decoder;
2149 extern AVCodec msmpeg4v2_decoder;
2150 extern AVCodec msmpeg4v3_decoder;
2151 extern AVCodec wmv1_decoder;
2152 extern AVCodec wmv2_decoder;
2153 extern AVCodec vc1_decoder;
2154 extern AVCodec wmv3_decoder;
2155 extern AVCodec mpeg1video_decoder;
2156 extern AVCodec mpeg2video_decoder;
2157 extern AVCodec mpegvideo_decoder;
2158 extern AVCodec mpeg_xvmc_decoder;
2159 extern AVCodec h263i_decoder;
2160 extern AVCodec flv_decoder;
2161 extern AVCodec rv10_decoder;
2162 extern AVCodec rv20_decoder;
2163 extern AVCodec rv30_decoder;
2164 extern AVCodec rv40_decoder;
2165 extern AVCodec svq1_decoder;
2166 extern AVCodec svq3_decoder;
2167 extern AVCodec dvvideo_decoder;
2168 extern AVCodec wmav1_decoder;
2169 extern AVCodec wmav2_decoder;
2170 extern AVCodec mjpeg_decoder;
2171 extern AVCodec mjpegb_decoder;
2172 extern AVCodec sp5x_decoder;
2173 extern AVCodec png_decoder;
2174 extern AVCodec mp2_decoder;
2175 extern AVCodec mp3_decoder;
2176 extern AVCodec mp3adu_decoder;
2177 extern AVCodec mp3on4_decoder;
2178 extern AVCodec qdm2_decoder;
2179 extern AVCodec cook_decoder;
2180 extern AVCodec truespeech_decoder;
2181 extern AVCodec tta_decoder;
2182 extern AVCodec mace3_decoder;
2183 extern AVCodec mace6_decoder;
2184 extern AVCodec huffyuv_decoder;
2185 extern AVCodec ffvhuff_decoder;
2186 extern AVCodec oggvorbis_decoder;
2187 extern AVCodec cyuv_decoder;
2188 extern AVCodec h264_decoder;
2189 extern AVCodec indeo3_decoder;
2190 extern AVCodec vp3_decoder;
2191 extern AVCodec theora_decoder;
2192 extern AVCodec amr_nb_decoder;
2193 extern AVCodec amr_nb_encoder;
2194 extern AVCodec amr_wb_encoder;
2195 extern AVCodec amr_wb_decoder;
2196 extern AVCodec aac_decoder;
2197 extern AVCodec mpeg4aac_decoder;
2198 extern AVCodec asv1_decoder;
2199 extern AVCodec asv2_decoder;
2200 extern AVCodec vcr1_decoder;
2201 extern AVCodec cljr_decoder;
2202 extern AVCodec ffv1_decoder;
2203 extern AVCodec snow_decoder;
2204 extern AVCodec fourxm_decoder;
2205 extern AVCodec mdec_decoder;
2206 extern AVCodec roq_decoder;
2207 extern AVCodec interplay_video_decoder;
2208 extern AVCodec xan_wc3_decoder;
2209 extern AVCodec rpza_decoder;
2210 extern AVCodec cinepak_decoder;
2211 extern AVCodec msrle_decoder;
2212 extern AVCodec msvideo1_decoder;
2213 extern AVCodec vqa_decoder;
2214 extern AVCodec idcin_decoder;
2215 extern AVCodec eightbps_decoder;
2216 extern AVCodec smc_decoder;
2217 extern AVCodec flic_decoder;
2218 extern AVCodec vmdvideo_decoder;
2219 extern AVCodec vmdaudio_decoder;
2220 extern AVCodec truemotion1_decoder;
2221 extern AVCodec truemotion2_decoder;
2222 extern AVCodec mszh_decoder;
2223 extern AVCodec zlib_decoder;
2224 extern AVCodec ra_144_decoder;
2225 extern AVCodec ra_288_decoder;
2226 extern AVCodec roq_dpcm_decoder;
2227 extern AVCodec interplay_dpcm_decoder;
2228 extern AVCodec xan_dpcm_decoder;
2229 extern AVCodec sol_dpcm_decoder;
2230 extern AVCodec sonic_decoder;
2231 extern AVCodec qtrle_decoder;
2232 extern AVCodec flac_decoder;
2233 extern AVCodec tscc_decoder;
2234 extern AVCodec cscd_decoder;
2235 extern AVCodec nuv_decoder;
2236 extern AVCodec ulti_decoder;
2237 extern AVCodec qdraw_decoder;
2238 extern AVCodec xl_decoder;
2239 extern AVCodec qpeg_decoder;
2240 extern AVCodec shorten_decoder;
2241 extern AVCodec loco_decoder;
2242 extern AVCodec wnv1_decoder;
2243 extern AVCodec aasc_decoder;
2244 extern AVCodec alac_decoder;
2245 extern AVCodec ws_snd1_decoder;
2246 extern AVCodec indeo2_decoder;
2247 extern AVCodec vorbis_decoder;
2248 extern AVCodec fraps_decoder;
2249 extern AVCodec libgsm_encoder;
2250 extern AVCodec libgsm_decoder;
2251 extern AVCodec bmp_decoder;
2252 extern AVCodec mmvideo_decoder;
2253 extern AVCodec zmbv_decoder;
2254 extern AVCodec avs_decoder;
2255 extern AVCodec smacker_decoder;
2256 extern AVCodec smackaud_decoder;
2257 extern AVCodec kmvc_decoder;
2258 extern AVCodec flashsv_decoder;
2259 extern AVCodec cavs_decoder;
2262 #define PCM_CODEC(id, name) \
2263 extern AVCodec name ## _decoder; \
2264 extern AVCodec name ## _encoder
2266 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2267 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2268 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2269 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2270 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2271 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2272 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2273 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2274 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2275 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2276 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2277 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2278 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2279 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2280 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2281 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2282 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2286 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2287 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2288 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2289 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2290 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2291 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2292 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2293 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2294 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2295 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2296 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2297 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2298 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2299 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2300 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2301 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2302 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2303 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2307 /* dummy raw video codec */
2308 extern AVCodec rawvideo_encoder;
2309 extern AVCodec rawvideo_decoder;
2311 /* the following codecs use external GPL libs */
2312 extern AVCodec ac3_decoder;
2313 extern AVCodec dts_decoder;
2316 extern AVCodec dvdsub_encoder;
2317 extern AVCodec dvdsub_decoder;
2318 extern AVCodec dvbsub_encoder;
2319 extern AVCodec dvbsub_decoder;
2323 struct ReSampleContext;
2324 struct AVResampleContext;
2326 typedef struct ReSampleContext ReSampleContext;
2328 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2329 int output_rate, int input_rate);
2330 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2331 void audio_resample_close(ReSampleContext *s);
2333 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2334 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2335 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2336 void av_resample_close(struct AVResampleContext *c);
2338 /* YUV420 format is assumed ! */
2340 struct ImgReSampleContext;
2342 typedef struct ImgReSampleContext ImgReSampleContext;
2344 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2345 int input_width, int input_height);
2347 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2348 int iwidth, int iheight,
2349 int topBand, int bottomBand,
2350 int leftBand, int rightBand,
2351 int padtop, int padbottom,
2352 int padleft, int padright);
2355 void img_resample(ImgReSampleContext *s,
2356 AVPicture *output, const AVPicture *input);
2358 void img_resample_close(ImgReSampleContext *s);
2361 * Allocate memory for a picture. Call avpicture_free to free it.
2363 * @param picture the picture to be filled in.
2364 * @param pix_fmt the format of the picture.
2365 * @param width the width of the picture.
2366 * @param height the height of the picture.
2367 * @return 0 if successful, -1 if not.
2369 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2371 /* Free a picture previously allocated by avpicture_alloc. */
2372 void avpicture_free(AVPicture *picture);
2374 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2375 int pix_fmt, int width, int height);
2376 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2377 unsigned char *dest, int dest_size);
2378 int avpicture_get_size(int pix_fmt, int width, int height);
2379 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2380 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2381 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2382 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2383 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2385 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2386 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2387 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2388 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2389 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2390 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2392 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2394 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2395 int has_alpha, int *loss_ptr);
2397 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2398 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2399 int img_get_alpha_info(const AVPicture *src,
2400 int pix_fmt, int width, int height);
2402 /* convert among pixel formats */
2403 int img_convert(AVPicture *dst, int dst_pix_fmt,
2404 const AVPicture *src, int pix_fmt,
2405 int width, int height);
2407 /* deinterlace a picture */
2408 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2409 int pix_fmt, int width, int height);
2411 /* external high level API */
2413 extern AVCodec *first_avcodec;
2415 /* returns LIBAVCODEC_VERSION_INT constant */
2416 unsigned avcodec_version(void);
2417 /* returns LIBAVCODEC_BUILD constant */
2418 unsigned avcodec_build(void);
2419 void avcodec_init(void);
2421 void register_avcodec(AVCodec *format);
2422 AVCodec *avcodec_find_encoder(enum CodecID id);
2423 AVCodec *avcodec_find_encoder_by_name(const char *name);
2424 AVCodec *avcodec_find_decoder(enum CodecID id);
2425 AVCodec *avcodec_find_decoder_by_name(const char *name);
2426 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2428 void avcodec_get_context_defaults(AVCodecContext *s);
2429 AVCodecContext *avcodec_alloc_context(void);
2430 void avcodec_get_frame_defaults(AVFrame *pic);
2431 AVFrame *avcodec_alloc_frame(void);
2433 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2434 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2435 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2436 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2437 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2438 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2440 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2441 void avcodec_thread_free(AVCodecContext *s);
2442 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2443 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2444 //FIXME func typedef
2447 * opens / inits the AVCodecContext.
2450 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2452 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2453 int *frame_size_ptr,
2454 uint8_t *buf, int buf_size);
2455 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2456 int *got_picture_ptr,
2457 uint8_t *buf, int buf_size);
2458 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2460 const uint8_t *buf, int buf_size);
2461 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2463 uint8_t *buf, int buf_size);
2464 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2465 const short *samples);
2466 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2467 const AVFrame *pict);
2468 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2469 const AVSubtitle *sub);
2471 int avcodec_close(AVCodecContext *avctx);
2473 void avcodec_register_all(void);
2475 void avcodec_flush_buffers(AVCodecContext *avctx);
2477 void avcodec_default_free_buffers(AVCodecContext *s);
2479 /* misc usefull functions */
2482 * returns a single letter to describe the picture type
2484 char av_get_pict_type_char(int pict_type);
2487 * returns codec bits per sample
2489 int av_get_bits_per_sample(enum CodecID codec_id);
2492 typedef struct AVCodecParserContext {
2494 struct AVCodecParser *parser;
2495 int64_t frame_offset; /* offset of the current frame */
2496 int64_t cur_offset; /* current offset
2497 (incremented by each av_parser_parse()) */
2498 int64_t last_frame_offset; /* offset of the last frame */
2500 int pict_type; /* XXX: put it back in AVCodecContext */
2501 int repeat_pict; /* XXX: put it back in AVCodecContext */
2502 int64_t pts; /* pts of the current frame */
2503 int64_t dts; /* dts of the current frame */
2508 int fetch_timestamp;
2510 #define AV_PARSER_PTS_NB 4
2511 int cur_frame_start_index;
2512 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2513 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2514 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2517 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2518 } AVCodecParserContext;
2520 typedef struct AVCodecParser {
2521 int codec_ids[5]; /* several codec IDs are permitted */
2523 int (*parser_init)(AVCodecParserContext *s);
2524 int (*parser_parse)(AVCodecParserContext *s,
2525 AVCodecContext *avctx,
2526 uint8_t **poutbuf, int *poutbuf_size,
2527 const uint8_t *buf, int buf_size);
2528 void (*parser_close)(AVCodecParserContext *s);
2529 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2530 struct AVCodecParser *next;
2533 extern AVCodecParser *av_first_parser;
2535 void av_register_codec_parser(AVCodecParser *parser);
2536 AVCodecParserContext *av_parser_init(int codec_id);
2537 int av_parser_parse(AVCodecParserContext *s,
2538 AVCodecContext *avctx,
2539 uint8_t **poutbuf, int *poutbuf_size,
2540 const uint8_t *buf, int buf_size,
2541 int64_t pts, int64_t dts);
2542 int av_parser_change(AVCodecParserContext *s,
2543 AVCodecContext *avctx,
2544 uint8_t **poutbuf, int *poutbuf_size,
2545 const uint8_t *buf, int buf_size, int keyframe);
2546 void av_parser_close(AVCodecParserContext *s);
2548 extern AVCodecParser mpegvideo_parser;
2549 extern AVCodecParser mpeg4video_parser;
2550 extern AVCodecParser cavsvideo_parser;
2551 extern AVCodecParser h261_parser;
2552 extern AVCodecParser h263_parser;
2553 extern AVCodecParser h264_parser;
2554 extern AVCodecParser mjpeg_parser;
2555 extern AVCodecParser pnm_parser;
2556 extern AVCodecParser mpegaudio_parser;
2557 extern AVCodecParser ac3_parser;
2558 extern AVCodecParser dvdsub_parser;
2559 extern AVCodecParser dvbsub_parser;
2560 extern AVCodecParser aac_parser;
2563 typedef struct AVBitStreamFilterContext {
2565 struct AVBitStreamFilter *filter;
2566 AVCodecParserContext *parser;
2567 struct AVBitStreamFilterContext *next;
2568 } AVBitStreamFilterContext;
2571 typedef struct AVBitStreamFilter {
2574 int (*filter)(AVBitStreamFilterContext *bsfc,
2575 AVCodecContext *avctx, const char *args,
2576 uint8_t **poutbuf, int *poutbuf_size,
2577 const uint8_t *buf, int buf_size, int keyframe);
2578 struct AVBitStreamFilter *next;
2579 } AVBitStreamFilter;
2581 extern AVBitStreamFilter *av_first_bitstream_filter;
2583 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2584 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2585 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2586 AVCodecContext *avctx, const char *args,
2587 uint8_t **poutbuf, int *poutbuf_size,
2588 const uint8_t *buf, int buf_size, int keyframe);
2589 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2591 extern AVBitStreamFilter dump_extradata_bsf;
2592 extern AVBitStreamFilter remove_extradata_bsf;
2593 extern AVBitStreamFilter noise_bsf;
2597 void *av_mallocz(unsigned int size);
2598 char *av_strdup(const char *s);
2599 void av_freep(void *ptr);
2600 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2601 /* for static data only */
2602 /* call av_free_static to release all staticaly allocated tables */
2603 void av_free_static(void);
2604 void *av_mallocz_static(unsigned int size);
2605 void *av_realloc_static(void *ptr, unsigned int size);
2607 void img_copy(AVPicture *dst, const AVPicture *src,
2608 int pix_fmt, int width, int height);
2610 int img_crop(AVPicture *dst, const AVPicture *src,
2611 int pix_fmt, int top_band, int left_band);
2613 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2614 int padtop, int padbottom, int padleft, int padright, int *color);
2617 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2618 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2619 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2620 (((uint8_t*)(x))[1] << 16) | \
2621 (((uint8_t*)(x))[2] << 8) | \
2623 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2624 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2625 (((uint8_t*)(x))[2] << 16) | \
2626 (((uint8_t*)(x))[1] << 8) | \
2630 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2636 #endif /* AVCODEC_H */