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)+(9<<8)+0)
21 #define LIBAVCODEC_VERSION 51.9.0
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,
122 /* various pcm "codecs" */
123 CODEC_ID_PCM_S16LE= 0x10000,
139 CODEC_ID_PCM_S24DAUD,
141 /* various adpcm codecs */
142 CODEC_ID_ADPCM_IMA_QT= 0x11000,
143 CODEC_ID_ADPCM_IMA_WAV,
144 CODEC_ID_ADPCM_IMA_DK3,
145 CODEC_ID_ADPCM_IMA_DK4,
146 CODEC_ID_ADPCM_IMA_WS,
147 CODEC_ID_ADPCM_IMA_SMJPEG,
156 CODEC_ID_ADPCM_YAMAHA,
157 CODEC_ID_ADPCM_SBPRO_4,
158 CODEC_ID_ADPCM_SBPRO_3,
159 CODEC_ID_ADPCM_SBPRO_2,
162 CODEC_ID_AMR_NB= 0x12000,
165 /* RealAudio codecs*/
166 CODEC_ID_RA_144= 0x13000,
169 /* various DPCM codecs */
170 CODEC_ID_ROQ_DPCM= 0x14000,
171 CODEC_ID_INTERPLAY_DPCM,
175 CODEC_ID_MP2= 0x15000,
176 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
195 CODEC_ID_WESTWOOD_SND1,
203 CODEC_ID_OGGTHEORA= 0x16000,
205 /* subtitle codecs */
206 CODEC_ID_DVD_SUBTITLE= 0x17000,
207 CODEC_ID_DVB_SUBTITLE,
209 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
210 stream (only used by libavformat) */
213 /* CODEC_ID_MP3LAME is absolete */
214 #define CODEC_ID_MP3LAME CODEC_ID_MP3
217 CODEC_TYPE_UNKNOWN = -1,
224 /* currently unused, may be used if 24/32 bits samples ever supported */
225 /* all in native endian */
227 SAMPLE_FMT_NONE = -1,
228 SAMPLE_FMT_U8, ///< unsigned 8 bits
229 SAMPLE_FMT_S16, ///< signed 16 bits
230 SAMPLE_FMT_S24, ///< signed 24 bits
231 SAMPLE_FMT_S32, ///< signed 32 bits
232 SAMPLE_FMT_FLT, ///< float
236 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
239 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
240 * this is mainly needed because some optimized bitstream readers read
241 * 32 or 64 bit at once and could read over the end<br>
242 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
243 * MPEG bitstreams could cause overread and segfault
245 #define FF_INPUT_BUFFER_PADDING_SIZE 8
248 * minimum encoding buffer size.
249 * used to avoid some checks during header writing
251 #define FF_MIN_BUFFER_SIZE 16384
253 /* motion estimation type, EPZS by default */
267 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
268 AVDISCARD_NONE =-16, ///< discard nothing
269 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
270 AVDISCARD_NONREF = 8, ///< discard all non reference
271 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
272 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
273 AVDISCARD_ALL = 48, ///< discard all
276 typedef struct RcOverride{
279 int qscale; // if this is 0 then quality_factor will be used instead
280 float quality_factor;
283 #define FF_MAX_B_FRAMES 16
286 these flags can be passed in AVCodecContext.flags before initing
287 Note: not everything is supported yet.
290 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
291 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
292 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
293 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
294 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
295 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
296 /* parent program gurantees that the input for b-frame containing streams is not written to
297 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
298 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
299 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
300 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
301 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
302 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
303 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
304 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
305 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
306 of only at frame boundaries */
307 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
308 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
309 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
310 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
311 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
312 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
313 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
314 /* Fx : Flag for h263+ extra options */
315 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
316 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
317 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
318 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
319 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
320 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
321 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
322 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
323 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
324 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
325 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
326 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
327 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
328 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
329 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
330 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
331 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
332 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
333 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
334 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
335 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
336 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
337 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
338 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
339 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
341 /* Unsupported options :
342 * Syntax Arithmetic coding (SAC)
343 * Reference Picture Selection
344 * Independant Segment Decoding */
346 /* codec capabilities */
348 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
350 * Codec uses get_buffer() for allocating buffers.
351 * direct rendering method 1
353 #define CODEC_CAP_DR1 0x0002
354 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
356 #define CODEC_CAP_PARSE_ONLY 0x0004
357 #define CODEC_CAP_TRUNCATED 0x0008
358 /* codec can export data for HW decoding (XvMC) */
359 #define CODEC_CAP_HWACCEL 0x0010
361 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
362 * if this is not set, the codec is guranteed to never be feeded with NULL data
364 #define CODEC_CAP_DELAY 0x0020
366 * Codec can be fed a final frame with a smaller size.
367 * This can be used to prevent truncation of the last audio samples.
369 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
371 //the following defines may change, don't expect compatibility if you use them
372 #define MB_TYPE_INTRA4x4 0x0001
373 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
374 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
375 #define MB_TYPE_16x16 0x0008
376 #define MB_TYPE_16x8 0x0010
377 #define MB_TYPE_8x16 0x0020
378 #define MB_TYPE_8x8 0x0040
379 #define MB_TYPE_INTERLACED 0x0080
380 #define MB_TYPE_DIRECT2 0x0100 //FIXME
381 #define MB_TYPE_ACPRED 0x0200
382 #define MB_TYPE_GMC 0x0400
383 #define MB_TYPE_SKIP 0x0800
384 #define MB_TYPE_P0L0 0x1000
385 #define MB_TYPE_P1L0 0x2000
386 #define MB_TYPE_P0L1 0x4000
387 #define MB_TYPE_P1L1 0x8000
388 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
389 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
390 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
391 #define MB_TYPE_QUANT 0x00010000
392 #define MB_TYPE_CBP 0x00020000
393 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
397 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
399 typedef struct AVPanScan{
402 * - encoding: set by user.
403 * - decoding: set by lavc
408 * width and height in 1/16 pel
409 * - encoding: set by user.
410 * - decoding: set by lavc
416 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
417 * - encoding: set by user.
418 * - decoding: set by lavc
420 int16_t position[3][2];
423 #define FF_COMMON_FRAME \
425 * pointer to the picture planes.\
426 * this might be different from the first allocated byte\
433 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
434 * this isn't used by lavc unless the default get/release_buffer() is used\
440 * 1 -> keyframe, 0-> not\
441 * - encoding: set by lavc\
442 * - decoding: set by lavc\
447 * picture type of the frame, see ?_TYPE below.\
448 * - encoding: set by lavc for coded_picture (and set by user for input)\
449 * - decoding: set by lavc\
454 * presentation timestamp in time_base units (time when frame should be shown to user)\
455 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
456 * - encoding: MUST be set by user\
457 * - decoding: set by lavc\
462 * picture number in bitstream order.\
463 * - encoding: set by\
464 * - decoding: set by lavc\
466 int coded_picture_number;\
468 * picture number in display order.\
469 * - encoding: set by\
470 * - decoding: set by lavc\
472 int display_picture_number;\
475 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
476 * - encoding: set by lavc for coded_picture (and set by user for input)\
477 * - decoding: set by lavc\
482 * buffer age (1->was last buffer and dint change, 2->..., ...).\
483 * set to INT_MAX if the buffer has not been used yet \
484 * - encoding: unused\
485 * - decoding: MUST be set by get_buffer()\
490 * is this picture used as reference\
491 * - encoding: unused\
492 * - decoding: set by lavc (before get_buffer() call))\
498 * - encoding: unused\
499 * - decoding: set by lavc\
501 int8_t *qscale_table;\
504 * - encoding: unused\
505 * - decoding: set by lavc\
510 * mbskip_table[mb]>=1 if MB didnt change\
511 * stride= mb_width = (width+15)>>4\
512 * - encoding: unused\
513 * - decoding: set by lavc\
515 uint8_t *mbskip_table;\
518 * Motion vector table.\
521 * int mv_sample_log2= 4 - motion_subsample_log2;\
522 * int mb_width= (width+15)>>4;\
523 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
524 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
526 * - encoding: set by user\
527 * - decoding: set by lavc\
529 int16_t (*motion_val[2])[2];\
532 * Macroblock type table\
533 * mb_type_base + mb_width + 2\
534 * - encoding: set by user\
535 * - decoding: set by lavc\
540 * log2 of the size of the block which a single vector in motion_val represents: \
541 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
542 * - encoding: unused\
543 * - decoding: set by lavc\
545 uint8_t motion_subsample_log2;\
548 * for some private data of the user\
549 * - encoding: unused\
550 * - decoding: set by user\
556 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
557 * - decoding: unused\
562 * type of the buffer (to keep track of who has to dealloc data[*])\
563 * - encoding: set by the one who allocs it\
564 * - decoding: set by the one who allocs it\
565 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
570 * when decoding, this signal how much the picture must be delayed.\
571 * extra_delay = repeat_pict / (2*fps)\
572 * - encoding: unused\
573 * - decoding: set by lavc\
583 * The content of the picture is interlaced.\
584 * - encoding: set by user\
585 * - decoding: set by lavc (default 0)\
587 int interlaced_frame;\
590 * if the content is interlaced, is top field displayed first.\
591 * - encoding: set by user\
592 * - decoding: set by lavc\
594 int top_field_first;\
598 * - encoding: set by user\
599 * - decoding: set by lavc\
601 AVPanScan *pan_scan;\
604 * tell user application that palette has changed from previous frame.\
605 * - encoding: ??? (no palette-enabled encoder yet)\
606 * - decoding: set by lavc (default 0)\
608 int palette_has_changed;\
611 * Codec suggestion on buffer type if != 0\
612 * - encoding: unused\
613 * - decoding: set by lavc (before get_buffer() call))\
619 * - encoding: unused\
620 * - decoding: set by lavc\
625 * Motion referece frame index\
626 * - encoding: set by user\
627 * - decoding: set by lavc\
629 int8_t *ref_index[2];
631 #define FF_QSCALE_TYPE_MPEG1 0
632 #define FF_QSCALE_TYPE_MPEG2 1
633 #define FF_QSCALE_TYPE_H264 2
635 #define FF_BUFFER_TYPE_INTERNAL 1
636 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
637 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
638 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
641 #define FF_I_TYPE 1 // Intra
642 #define FF_P_TYPE 2 // Predicted
643 #define FF_B_TYPE 3 // Bi-dir predicted
644 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
648 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
649 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
650 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
651 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
656 typedef struct AVFrame {
660 #define DEFAULT_FRAME_RATE_BASE 1001000
665 typedef struct AVCLASS AVClass;
667 const char* class_name;
668 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
669 or AVFormatContext, which begin with an AVClass.
670 Needed because av_log is in libavcodec and has no visibility
671 of AVIn/OutputFormat */
672 struct AVOption *option;
676 * main external api structure.
678 typedef struct AVCodecContext {
680 * Info on struct for av_log
681 * - set by avcodec_alloc_context
685 * the average bitrate.
686 * - encoding: set by user. unused for constant quantizer encoding
687 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
692 * number of bits the bitstream is allowed to diverge from the reference.
693 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
694 * - encoding: set by user. unused for constant quantizer encoding
697 int bit_rate_tolerance;
701 * - encoding: set by user.
702 * - decoding: set by user.
707 * some codecs needs additionnal format info. It is stored here
708 * - encoding: set by user.
709 * - decoding: set by lavc. (FIXME is this ok?)
714 * motion estimation algorithm used for video coding.
715 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
716 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
717 * - encoding: MUST be set by user.
723 * some codecs need / can use extra-data like huffman tables.
724 * mjpeg: huffman tables
725 * rv10: additional flags
726 * mpeg4: global headers (they can be in the bitstream or here)
727 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
728 * then extradata_size to avoid prolems if its read with the bitstream reader
729 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
730 * - encoding: set/allocated/freed by lavc.
731 * - decoding: set/allocated/freed by user.
737 * this is the fundamental unit of time (in seconds) in terms
738 * of which frame timestamps are represented. for fixed-fps content,
739 * timebase should be 1/framerate and timestamp increments should be
741 * - encoding: MUST be set by user
742 * - decoding: set by lavc.
744 AVRational time_base;
748 * picture width / height.
749 * - encoding: MUST be set by user.
750 * - decoding: set by lavc.
751 * Note, for compatibility its possible to set this instead of
752 * coded_width/height before decoding
756 #define FF_ASPECT_EXTENDED 15
759 * the number of pictures in a group of pitures, or 0 for intra_only.
760 * - encoding: set by user.
766 * pixel format, see PIX_FMT_xxx.
767 * - encoding: set by user.
768 * - decoding: set by lavc.
770 enum PixelFormat pix_fmt;
773 * Frame rate emulation. If not zero lower layer (i.e. format handler)
774 * has to read frames at native frame rate.
775 * - encoding: set by user.
776 * - decoding: unused.
781 * if non NULL, 'draw_horiz_band' is called by the libavcodec
782 * decoder to draw an horizontal band. It improve cache usage. Not
783 * all codecs can do that. You must check the codec capabilities
786 * - decoding: set by user.
787 * @param height the height of the slice
788 * @param y the y position of the slice
789 * @param type 1->top field, 2->bottom field, 3->frame
790 * @param offset offset into the AVFrame.data from which the slice should be read
792 void (*draw_horiz_band)(struct AVCodecContext *s,
793 const AVFrame *src, int offset[4],
794 int y, int type, int height);
797 int sample_rate; ///< samples per sec
801 * audio sample format.
802 * - encoding: set by user.
803 * - decoding: set by lavc.
805 enum SampleFormat sample_fmt; ///< sample format, currenly unused
807 /* the following data should not be initialized */
809 * samples per packet. initialized when calling 'init'
812 int frame_number; ///< audio or video frame number
813 int real_pict_num; ///< returns the real picture number of previous encoded frame
816 * number of frames the decoded output will be delayed relative to
818 * - encoding: set by lavc.
823 /* - encoding parameters */
824 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
825 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
829 * - encoding: set by user.
836 * - encoding: set by user.
842 * maximum quantizer difference etween frames.
843 * - encoding: set by user.
849 * maximum number of b frames between non b frames.
850 * note: the output will be delayed by max_b_frames+1 relative to the input
851 * - encoding: set by user.
857 * qscale factor between ip and b frames.
858 * - encoding: set by user.
861 float b_quant_factor;
863 /** obsolete FIXME remove */
865 #define FF_RC_STRATEGY_XVID 1
867 int b_frame_strategy;
871 * deprecated in favor of skip_idct and skip_frame
873 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
877 struct AVCodec *codec;
881 /* unused, FIXME remove*/
884 int rtp_payload_size; /* The size of the RTP payload: the coder will */
885 /* do it's best to deliver a chunk with size */
886 /* below rtp_payload_size, the chunk will start */
887 /* with a start code on some codecs like H.263 */
888 /* This doesn't take account of any particular */
889 /* headers inside the transmited RTP payload */
892 /* The RTP callback: This function is called */
893 /* every time the encoder has a packet to send */
894 /* Depends on the encoder if the data starts */
895 /* with a Start Code (it should) H.263 does. */
896 /* mb_nb contains the number of macroblocks */
897 /* encoded in the RTP payload */
898 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
900 /* statistics, used for 2-pass encoding */
911 * number of bits used for the previously encoded frame.
912 * - encoding: set by lavc
918 * private data of the user, can be used to carry app specific stuff.
919 * - encoding: set by user
920 * - decoding: set by user
925 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
926 enum CodecID codec_id; /* see CODEC_ID_xxx */
929 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
930 * this is used to workaround some encoder bugs
931 * - encoding: set by user, if not then the default based on codec_id will be used
932 * - decoding: set by user, will be converted to upper case by lavc during init
934 unsigned int codec_tag;
937 * workaround bugs in encoders which sometimes cannot be detected automatically.
938 * - encoding: set by user
939 * - decoding: set by user
942 #define FF_BUG_AUTODETECT 1 ///< autodetection
943 #define FF_BUG_OLD_MSMPEG4 2
944 #define FF_BUG_XVID_ILACE 4
945 #define FF_BUG_UMP4 8
946 #define FF_BUG_NO_PADDING 16
947 #define FF_BUG_AMV 32
948 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
949 #define FF_BUG_QPEL_CHROMA 64
950 #define FF_BUG_STD_QPEL 128
951 #define FF_BUG_QPEL_CHROMA2 256
952 #define FF_BUG_DIRECT_BLOCKSIZE 512
953 #define FF_BUG_EDGE 1024
954 #define FF_BUG_HPEL_CHROMA 2048
955 #define FF_BUG_DC_CLIP 4096
956 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
957 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
960 * luma single coeff elimination threshold.
961 * - encoding: set by user
964 int luma_elim_threshold;
967 * chroma single coeff elimination threshold.
968 * - encoding: set by user
971 int chroma_elim_threshold;
974 * strictly follow the std (MPEG4, ...).
975 * - encoding: set by user
978 int strict_std_compliance;
979 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
980 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
981 #define FF_COMPLIANCE_NORMAL 0
982 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
983 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
986 * qscale offset between ip and b frames.
987 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
988 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
989 * - encoding: set by user.
992 float b_quant_offset;
995 * error resilience higher values will detect more errors but may missdetect
996 * some more or less valid parts as errors.
998 * - decoding: set by user
1000 int error_resilience;
1001 #define FF_ER_CAREFUL 1
1002 #define FF_ER_COMPLIANT 2
1003 #define FF_ER_AGGRESSIVE 3
1004 #define FF_ER_VERY_AGGRESSIVE 4
1007 * called at the beginning of each frame to get a buffer for it.
1008 * if pic.reference is set then the frame will be read later by lavc
1009 * avcodec_align_dimensions() should be used to find the required width and
1010 * height, as they normally need to be rounded up to the next multiple of 16
1011 * - encoding: unused
1012 * - decoding: set by lavc, user can override
1014 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1017 * called to release buffers which where allocated with get_buffer.
1018 * a released buffer can be reused in get_buffer()
1019 * pic.data[*] must be set to NULL
1020 * - encoding: unused
1021 * - decoding: set by lavc, user can override
1023 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1026 * if 1 the stream has a 1 frame delay during decoding.
1027 * - encoding: set by lavc
1028 * - decoding: set by lavc
1033 * number of bytes per packet if constant and known or 0
1034 * used by some WAV based audio codecs
1038 int parse_only; /* - decoding only: if true, only parsing is done
1039 (function avcodec_parse_frame()). The frame
1040 data is returned. Only MPEG codecs support this now. */
1043 * 0-> h263 quant 1-> mpeg quant.
1044 * - encoding: set by user.
1045 * - decoding: unused
1050 * pass1 encoding statistics output buffer.
1051 * - encoding: set by lavc
1052 * - decoding: unused
1057 * pass2 encoding statistics input buffer.
1058 * concatenated stuff from stats_out of pass1 should be placed here
1059 * - encoding: allocated/set/freed by user
1060 * - decoding: unused
1065 * ratecontrol qmin qmax limiting method.
1066 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1067 * - encoding: set by user.
1068 * - decoding: unused
1076 * ratecontrol override, see RcOverride.
1077 * - encoding: allocated/set/freed by user.
1078 * - decoding: unused
1080 RcOverride *rc_override;
1081 int rc_override_count;
1084 * rate control equation.
1085 * - encoding: set by user
1086 * - decoding: unused
1092 * - encoding: set by user.
1093 * - decoding: unused
1099 * - encoding: set by user.
1100 * - decoding: unused
1105 * decoder bitstream buffer size.
1106 * - encoding: set by user.
1107 * - decoding: unused
1110 float rc_buffer_aggressivity;
1113 * qscale factor between p and i frames.
1114 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1115 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1116 * - encoding: set by user.
1117 * - decoding: unused
1119 float i_quant_factor;
1122 * qscale offset between p and i frames.
1123 * - encoding: set by user.
1124 * - decoding: unused
1126 float i_quant_offset;
1129 * initial complexity for pass1 ratecontrol.
1130 * - encoding: set by user.
1131 * - decoding: unused
1133 float rc_initial_cplx;
1136 * dct algorithm, see FF_DCT_* below.
1137 * - encoding: set by user
1138 * - decoding: unused
1141 #define FF_DCT_AUTO 0
1142 #define FF_DCT_FASTINT 1
1143 #define FF_DCT_INT 2
1144 #define FF_DCT_MMX 3
1145 #define FF_DCT_MLIB 4
1146 #define FF_DCT_ALTIVEC 5
1147 #define FF_DCT_FAAN 6
1150 * luminance masking (0-> disabled).
1151 * - encoding: set by user
1152 * - decoding: unused
1157 * temporary complexity masking (0-> disabled).
1158 * - encoding: set by user
1159 * - decoding: unused
1161 float temporal_cplx_masking;
1164 * spatial complexity masking (0-> disabled).
1165 * - encoding: set by user
1166 * - decoding: unused
1168 float spatial_cplx_masking;
1171 * p block masking (0-> disabled).
1172 * - encoding: set by user
1173 * - decoding: unused
1178 * darkness masking (0-> disabled).
1179 * - encoding: set by user
1180 * - decoding: unused
1185 /* for binary compatibility */
1189 * idct algorithm, see FF_IDCT_* below.
1190 * - encoding: set by user
1191 * - decoding: set by user
1194 #define FF_IDCT_AUTO 0
1195 #define FF_IDCT_INT 1
1196 #define FF_IDCT_SIMPLE 2
1197 #define FF_IDCT_SIMPLEMMX 3
1198 #define FF_IDCT_LIBMPEG2MMX 4
1199 #define FF_IDCT_PS2 5
1200 #define FF_IDCT_MLIB 6
1201 #define FF_IDCT_ARM 7
1202 #define FF_IDCT_ALTIVEC 8
1203 #define FF_IDCT_SH4 9
1204 #define FF_IDCT_SIMPLEARM 10
1205 #define FF_IDCT_H264 11
1206 #define FF_IDCT_VP3 12
1207 #define FF_IDCT_IPP 13
1208 #define FF_IDCT_XVIDMMX 14
1212 * - encoding: set by lavc
1213 * - decoding: set by user (or 0)
1217 * slice offsets in the frame in bytes.
1218 * - encoding: set/allocated by lavc
1219 * - decoding: set/allocated by user (or NULL)
1224 * error concealment flags.
1225 * - encoding: unused
1226 * - decoding: set by user
1228 int error_concealment;
1229 #define FF_EC_GUESS_MVS 1
1230 #define FF_EC_DEBLOCK 2
1233 * dsp_mask could be add used to disable unwanted CPU features
1234 * CPU features (i.e. MMX, SSE. ...)
1236 * with FORCE flag you may instead enable given CPU features
1237 * (Dangerous: usable in case of misdetection, improper usage however will
1238 * result into program crash)
1241 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1242 /* lower 16 bits - CPU features */
1244 #define FF_MM_MMX 0x0001 /* standard MMX */
1245 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1246 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1247 #define FF_MM_SSE 0x0008 /* SSE functions */
1248 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1249 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1250 #endif /* HAVE_MMX */
1252 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1253 #endif /* HAVE_IWMMXT */
1256 * bits per sample/pixel from the demuxer (needed for huffyuv).
1257 * - encoding: set by lavc
1258 * - decoding: set by user
1260 int bits_per_sample;
1263 * prediction method (needed for huffyuv).
1264 * - encoding: set by user
1265 * - decoding: unused
1267 int prediction_method;
1268 #define FF_PRED_LEFT 0
1269 #define FF_PRED_PLANE 1
1270 #define FF_PRED_MEDIAN 2
1273 * sample aspect ratio (0 if unknown).
1274 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1275 * - encoding: set by user.
1276 * - decoding: set by lavc.
1278 AVRational sample_aspect_ratio;
1281 * the picture in the bitstream.
1282 * - encoding: set by lavc
1283 * - decoding: set by lavc
1285 AVFrame *coded_frame;
1289 * - encoding: set by user.
1290 * - decoding: set by user.
1293 #define FF_DEBUG_PICT_INFO 1
1294 #define FF_DEBUG_RC 2
1295 #define FF_DEBUG_BITSTREAM 4
1296 #define FF_DEBUG_MB_TYPE 8
1297 #define FF_DEBUG_QP 16
1298 #define FF_DEBUG_MV 32
1299 #define FF_DEBUG_DCT_COEFF 0x00000040
1300 #define FF_DEBUG_SKIP 0x00000080
1301 #define FF_DEBUG_STARTCODE 0x00000100
1302 #define FF_DEBUG_PTS 0x00000200
1303 #define FF_DEBUG_ER 0x00000400
1304 #define FF_DEBUG_MMCO 0x00000800
1305 #define FF_DEBUG_BUGS 0x00001000
1306 #define FF_DEBUG_VIS_QP 0x00002000
1307 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1311 * - encoding: set by user.
1312 * - decoding: set by user.
1315 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1316 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1317 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1321 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1322 * - decoding: unused
1327 * minimum MB quantizer.
1328 * - encoding: unused
1329 * - decoding: unused
1334 * maximum MB quantizer.
1335 * - encoding: unused
1336 * - decoding: unused
1341 * motion estimation compare function.
1342 * - encoding: set by user.
1343 * - decoding: unused
1347 * subpixel motion estimation compare function.
1348 * - encoding: set by user.
1349 * - decoding: unused
1353 * macroblock compare function (not supported yet).
1354 * - encoding: set by user.
1355 * - decoding: unused
1359 * interlaced dct compare function
1360 * - encoding: set by user.
1361 * - decoding: unused
1364 #define FF_CMP_SAD 0
1365 #define FF_CMP_SSE 1
1366 #define FF_CMP_SATD 2
1367 #define FF_CMP_DCT 3
1368 #define FF_CMP_PSNR 4
1369 #define FF_CMP_BIT 5
1371 #define FF_CMP_ZERO 7
1372 #define FF_CMP_VSAD 8
1373 #define FF_CMP_VSSE 9
1374 #define FF_CMP_NSSE 10
1375 #define FF_CMP_W53 11
1376 #define FF_CMP_W97 12
1377 #define FF_CMP_DCTMAX 13
1378 #define FF_CMP_DCT264 14
1379 #define FF_CMP_CHROMA 256
1382 * ME diamond size & shape.
1383 * - encoding: set by user.
1384 * - decoding: unused
1389 * amount of previous MV predictors (2a+1 x 2a+1 square).
1390 * - encoding: set by user.
1391 * - decoding: unused
1393 int last_predictor_count;
1396 * pre pass for motion estimation.
1397 * - encoding: set by user.
1398 * - decoding: unused
1403 * motion estimation pre pass compare function.
1404 * - encoding: set by user.
1405 * - decoding: unused
1410 * ME pre pass diamond size & shape.
1411 * - encoding: set by user.
1412 * - decoding: unused
1417 * subpel ME quality.
1418 * - encoding: set by user.
1419 * - decoding: unused
1421 int me_subpel_quality;
1424 * callback to negotiate the pixelFormat.
1425 * @param fmt is the list of formats which are supported by the codec,
1426 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1427 * the first is allways the native one
1428 * @return the choosen format
1429 * - encoding: unused
1430 * - decoding: set by user, if not set then the native format will always be choosen
1432 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1435 * DTG active format information (additionnal aspect ratio
1436 * information only used in DVB MPEG2 transport streams). 0 if
1439 * - encoding: unused.
1440 * - decoding: set by decoder
1442 int dtg_active_format;
1443 #define FF_DTG_AFD_SAME 8
1444 #define FF_DTG_AFD_4_3 9
1445 #define FF_DTG_AFD_16_9 10
1446 #define FF_DTG_AFD_14_9 11
1447 #define FF_DTG_AFD_4_3_SP_14_9 13
1448 #define FF_DTG_AFD_16_9_SP_14_9 14
1449 #define FF_DTG_AFD_SP_4_3 15
1452 * Maximum motion estimation search range in subpel units.
1453 * if 0 then no limit
1455 * - encoding: set by user.
1456 * - decoding: unused.
1461 * intra quantizer bias.
1462 * - encoding: set by user.
1463 * - decoding: unused
1465 int intra_quant_bias;
1466 #define FF_DEFAULT_QUANT_BIAS 999999
1469 * inter quantizer bias.
1470 * - encoding: set by user.
1471 * - decoding: unused
1473 int inter_quant_bias;
1477 * - encoding: unused.
1478 * - decoding: which clrtable should be used for 8bit RGB images
1479 * table have to be stored somewhere FIXME
1484 * internal_buffer count.
1485 * Don't touch, used by lavc default_get_buffer()
1487 int internal_buffer_count;
1491 * Don't touch, used by lavc default_get_buffer()
1493 void *internal_buffer;
1495 #define FF_LAMBDA_SHIFT 7
1496 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1497 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1498 #define FF_LAMBDA_MAX (256*128-1)
1500 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1502 * global quality for codecs which cannot change it per frame.
1503 * this should be proportional to MPEG1/2/4 qscale.
1504 * - encoding: set by user.
1505 * - decoding: unused
1509 #define FF_CODER_TYPE_VLC 0
1510 #define FF_CODER_TYPE_AC 1
1513 * - encoding: set by user.
1514 * - decoding: unused
1520 * - encoding: set by user.
1521 * - decoding: unused
1527 * - encoding: unused
1528 * - decoding: set by user.
1530 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1535 * - encoding: unused
1536 * - decoding: set by user.
1539 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1540 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1541 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1544 * XVideo Motion Acceleration
1545 * - encoding: forbidden
1546 * - decoding: set by decoder
1548 int xvmc_acceleration;
1551 * macroblock decision mode
1552 * - encoding: set by user.
1553 * - decoding: unused
1556 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1557 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1558 #define FF_MB_DECISION_RD 2 ///< rate distoration
1561 * custom intra quantization matrix
1562 * - encoding: set by user, can be NULL
1563 * - decoding: set by lavc
1565 uint16_t *intra_matrix;
1568 * custom inter quantization matrix
1569 * - encoding: set by user, can be NULL
1570 * - decoding: set by lavc
1572 uint16_t *inter_matrix;
1575 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1576 * this is used to workaround some encoder bugs
1577 * - encoding: unused
1578 * - decoding: set by user, will be converted to upper case by lavc during init
1580 unsigned int stream_codec_tag;
1583 * scene change detection threshold.
1584 * 0 is default, larger means fewer detected scene changes
1585 * - encoding: set by user.
1586 * - decoding: unused
1588 int scenechange_threshold;
1591 * minimum lagrange multipler
1592 * - encoding: set by user.
1593 * - decoding: unused
1598 * maximum lagrange multipler
1599 * - encoding: set by user.
1600 * - decoding: unused
1605 * Palette control structure
1606 * - encoding: ??? (no palette-enabled encoder yet)
1607 * - decoding: set by user.
1609 struct AVPaletteControl *palctrl;
1612 * noise reduction strength
1613 * - encoding: set by user.
1614 * - decoding: unused
1616 int noise_reduction;
1619 * called at the beginning of a frame to get cr buffer for it.
1620 * buffer type (size, hints) must be the same. lavc won't check it.
1621 * lavc will pass previous buffer in pic, function should return
1622 * same buffer or new buffer with old frame "painted" into it.
1623 * if pic.data[0] == NULL must behave like get_buffer().
1624 * - encoding: unused
1625 * - decoding: set by lavc, user can override
1627 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1630 * number of bits which should be loaded into the rc buffer before decoding starts
1631 * - encoding: set by user.
1632 * - decoding: unused
1634 int rc_initial_buffer_occupancy;
1638 * - encoding: set by user.
1639 * - decoding: unused
1641 int inter_threshold;
1645 * - encoding: set by user.
1646 * - decoding: set by user.
1651 * simulates errors in the bitstream to test error concealment.
1652 * - encoding: set by user.
1653 * - decoding: unused.
1658 * MP3 antialias algorithm, see FF_AA_* below.
1659 * - encoding: unused
1660 * - decoding: set by user
1663 #define FF_AA_AUTO 0
1664 #define FF_AA_FASTINT 1 //not implemented yet
1666 #define FF_AA_FLOAT 3
1668 * Quantizer noise shaping.
1669 * - encoding: set by user
1670 * - decoding: unused
1672 int quantizer_noise_shaping;
1676 * is used to decide how many independant tasks should be passed to execute()
1677 * - encoding: set by user
1678 * - decoding: set by user
1683 * the codec may call this to execute several independant things. it will return only after
1684 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1685 * default implementation will execute the parts serially
1686 * @param count the number of things to execute
1687 * - encoding: set by lavc, user can override
1688 * - decoding: set by lavc, user can override
1690 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1694 * can be used by execute() to store some per AVCodecContext stuff.
1695 * - encoding: set by execute()
1696 * - decoding: set by execute()
1698 void *thread_opaque;
1701 * Motion estimation threshold. under which no motion estimation is
1702 * performed, but instead the user specified motion vectors are used
1704 * - encoding: set by user
1705 * - decoding: unused
1710 * Macroblock threshold. under which the user specified macroblock types will be used
1711 * - encoding: set by user
1712 * - decoding: unused
1717 * precision of the intra dc coefficient - 8.
1718 * - encoding: set by user
1719 * - decoding: unused
1721 int intra_dc_precision;
1724 * noise vs. sse weight for the nsse comparsion function.
1725 * - encoding: set by user
1726 * - decoding: unused
1731 * number of macroblock rows at the top which are skipped.
1732 * - encoding: unused
1733 * - decoding: set by user
1738 * number of macroblock rows at the bottom which are skipped.
1739 * - encoding: unused
1740 * - decoding: set by user
1746 * - encoding: set by user
1747 * - decoding: set by lavc
1750 #define FF_PROFILE_UNKNOWN -99
1754 * - encoding: set by user
1755 * - decoding: set by lavc
1758 #define FF_LEVEL_UNKNOWN -99
1761 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1762 * - encoding: unused
1763 * - decoding: set by user
1768 * bitsream width / height. may be different from width/height if lowres
1769 * or other things are used
1770 * - encoding: unused
1771 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1773 int coded_width, coded_height;
1776 * frame skip threshold
1777 * - encoding: set by user
1778 * - decoding: unused
1780 int frame_skip_threshold;
1784 * - encoding: set by user
1785 * - decoding: unused
1787 int frame_skip_factor;
1790 * frame skip exponent
1791 * - encoding: set by user
1792 * - decoding: unused
1797 * frame skip comparission function
1798 * - encoding: set by user.
1799 * - decoding: unused
1804 * border processing masking. raises the quantizer for mbs on the borders
1806 * - encoding: set by user
1807 * - decoding: unused
1809 float border_masking;
1812 * minimum MB lagrange multipler.
1813 * - encoding: set by user.
1814 * - decoding: unused
1819 * maximum MB lagrange multipler.
1820 * - encoding: set by user.
1821 * - decoding: unused
1827 * - encoding: set by user.
1828 * - decoding: unused
1830 int me_penalty_compensation;
1834 * - encoding: unused
1835 * - decoding: set by user.
1837 enum AVDiscard skip_loop_filter;
1841 * - encoding: unused
1842 * - decoding: set by user.
1844 enum AVDiscard skip_idct;
1848 * - encoding: unused
1849 * - decoding: set by user.
1851 enum AVDiscard skip_frame;
1855 * - encoding: set by user.
1856 * - decoding: unused
1862 * - encoding: set by user.
1863 * - decoding: unused
1868 * constant rate factor - quality-based VBR - values ~correspond to qps
1869 * - encoding: set by user.
1870 * - decoding: unused
1875 * constant quantization parameter rate control method
1876 * - encoding: set by user.
1877 * - decoding: unused
1883 * - encoding: set by user.
1884 * - decoding: unused
1889 * number of reference frames
1890 * - encoding: set by user.
1891 * - decoding: unused
1896 * chroma qp offset from luma
1897 * - encoding: set by user.
1898 * - decoding: unused
1903 * influences how often b-frames are used
1904 * - encoding: set by user.
1905 * - decoding: unused
1910 * trellis RD quantization
1911 * - encoding: set by user.
1912 * - decoding: unused
1917 * reduce fluctuations in qp (before curve compression)
1918 * - encoding: set by user.
1919 * - decoding: unused
1921 float complexityblur;
1924 * in-loop deblocking filter alphac0 parameter
1925 * alpha is in the range -6...6
1926 * - encoding: set by user.
1927 * - decoding: unused
1932 * in-loop deblocking filter beta parameter
1933 * beta is in the range -6...6
1934 * - encoding: set by user.
1935 * - decoding: unused
1940 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1941 * - encoding: set by user.
1942 * - decoding: unused
1945 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1946 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1947 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1948 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1949 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1952 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1953 * - encoding: set by user.
1954 * - decoding: unused
1959 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1960 * - encoding: set by user.
1961 * - decoding: unused
1966 * multiplied by qscale for each frame and added to scene_change_score
1967 * - encoding: set by user.
1968 * - decoding: unused
1970 int scenechange_factor;
1974 * note: value depends upon the compare functin used for fullpel ME
1975 * - encoding: set by user.
1976 * - decoding: unused
1981 * adjusts sensitivity of b_frame_strategy 1
1982 * - encoding: set by user.
1983 * - decoding: unused
1991 typedef struct AVCodec {
1993 enum CodecType type;
1996 int (*init)(AVCodecContext *);
1997 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1998 int (*close)(AVCodecContext *);
1999 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2000 uint8_t *buf, int buf_size);
2002 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2003 void *dummy; // FIXME remove next time we break binary compatibility
2005 struct AVCodec *next;
2006 void (*flush)(AVCodecContext *);
2007 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2008 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2012 * four components are given, that's all.
2013 * the last component is alpha
2015 typedef struct AVPicture {
2017 int linesize[4]; ///< number of bytes per line
2022 * This structure defines a method for communicating palette changes
2023 * between and demuxer and a decoder.
2025 #define AVPALETTE_SIZE 1024
2026 #define AVPALETTE_COUNT 256
2027 typedef struct AVPaletteControl {
2029 /* demuxer sets this to 1 to indicate the palette has changed;
2030 * decoder resets to 0 */
2031 int palette_changed;
2033 /* 4-byte ARGB palette entries, stored in native byte order; note that
2034 * the individual palette components should be on a 8-bit scale; if
2035 * the palette data comes from a IBM VGA native format, the component
2036 * data is probably 6 bits in size and needs to be scaled */
2037 unsigned int palette[AVPALETTE_COUNT];
2041 typedef struct AVSubtitleRect {
2048 uint32_t *rgba_palette;
2052 typedef struct AVSubtitle {
2053 uint16_t format; /* 0 = graphics */
2054 uint32_t start_display_time; /* relative to packet pts, in ms */
2055 uint32_t end_display_time; /* relative to packet pts, in ms */
2057 AVSubtitleRect *rects;
2060 extern AVCodec ac3_encoder;
2061 extern AVCodec mp2_encoder;
2062 extern AVCodec mp3lame_encoder;
2063 extern AVCodec oggvorbis_encoder;
2064 extern AVCodec oggtheora_encoder;
2065 extern AVCodec faac_encoder;
2066 extern AVCodec flac_encoder;
2067 extern AVCodec xvid_encoder;
2068 extern AVCodec mpeg1video_encoder;
2069 extern AVCodec mpeg2video_encoder;
2070 extern AVCodec h261_encoder;
2071 extern AVCodec h263_encoder;
2072 extern AVCodec h263p_encoder;
2073 extern AVCodec flv_encoder;
2074 extern AVCodec rv10_encoder;
2075 extern AVCodec rv20_encoder;
2076 extern AVCodec dvvideo_encoder;
2077 extern AVCodec mjpeg_encoder;
2078 extern AVCodec ljpeg_encoder;
2079 extern AVCodec jpegls_encoder;
2080 extern AVCodec png_encoder;
2081 extern AVCodec ppm_encoder;
2082 extern AVCodec pgm_encoder;
2083 extern AVCodec pgmyuv_encoder;
2084 extern AVCodec pbm_encoder;
2085 extern AVCodec pam_encoder;
2086 extern AVCodec mpeg4_encoder;
2087 extern AVCodec msmpeg4v1_encoder;
2088 extern AVCodec msmpeg4v2_encoder;
2089 extern AVCodec msmpeg4v3_encoder;
2090 extern AVCodec wmv1_encoder;
2091 extern AVCodec wmv2_encoder;
2092 extern AVCodec huffyuv_encoder;
2093 extern AVCodec ffvhuff_encoder;
2094 extern AVCodec h264_encoder;
2095 extern AVCodec asv1_encoder;
2096 extern AVCodec asv2_encoder;
2097 extern AVCodec vcr1_encoder;
2098 extern AVCodec ffv1_encoder;
2099 extern AVCodec snow_encoder;
2100 extern AVCodec mdec_encoder;
2101 extern AVCodec zlib_encoder;
2102 extern AVCodec sonic_encoder;
2103 extern AVCodec sonic_ls_encoder;
2104 extern AVCodec svq1_encoder;
2105 extern AVCodec x264_encoder;
2107 extern AVCodec h263_decoder;
2108 extern AVCodec h261_decoder;
2109 extern AVCodec mpeg4_decoder;
2110 extern AVCodec msmpeg4v1_decoder;
2111 extern AVCodec msmpeg4v2_decoder;
2112 extern AVCodec msmpeg4v3_decoder;
2113 extern AVCodec wmv1_decoder;
2114 extern AVCodec wmv2_decoder;
2115 extern AVCodec vc9_decoder;
2116 extern AVCodec wmv3_decoder;
2117 extern AVCodec mpeg1video_decoder;
2118 extern AVCodec mpeg2video_decoder;
2119 extern AVCodec mpegvideo_decoder;
2120 extern AVCodec mpeg_xvmc_decoder;
2121 extern AVCodec h263i_decoder;
2122 extern AVCodec flv_decoder;
2123 extern AVCodec rv10_decoder;
2124 extern AVCodec rv20_decoder;
2125 extern AVCodec rv30_decoder;
2126 extern AVCodec rv40_decoder;
2127 extern AVCodec svq1_decoder;
2128 extern AVCodec svq3_decoder;
2129 extern AVCodec dvvideo_decoder;
2130 extern AVCodec wmav1_decoder;
2131 extern AVCodec wmav2_decoder;
2132 extern AVCodec mjpeg_decoder;
2133 extern AVCodec mjpegb_decoder;
2134 extern AVCodec sp5x_decoder;
2135 extern AVCodec png_decoder;
2136 extern AVCodec mp2_decoder;
2137 extern AVCodec mp3_decoder;
2138 extern AVCodec mp3adu_decoder;
2139 extern AVCodec mp3on4_decoder;
2140 extern AVCodec qdm2_decoder;
2141 extern AVCodec cook_decoder;
2142 extern AVCodec truespeech_decoder;
2143 extern AVCodec tta_decoder;
2144 extern AVCodec mace3_decoder;
2145 extern AVCodec mace6_decoder;
2146 extern AVCodec huffyuv_decoder;
2147 extern AVCodec ffvhuff_decoder;
2148 extern AVCodec oggvorbis_decoder;
2149 extern AVCodec oggtheora_decoder;
2150 extern AVCodec cyuv_decoder;
2151 extern AVCodec h264_decoder;
2152 extern AVCodec indeo3_decoder;
2153 extern AVCodec vp3_decoder;
2154 extern AVCodec theora_decoder;
2155 extern AVCodec amr_nb_decoder;
2156 extern AVCodec amr_nb_encoder;
2157 extern AVCodec amr_wb_encoder;
2158 extern AVCodec amr_wb_decoder;
2159 extern AVCodec aac_decoder;
2160 extern AVCodec mpeg4aac_decoder;
2161 extern AVCodec asv1_decoder;
2162 extern AVCodec asv2_decoder;
2163 extern AVCodec vcr1_decoder;
2164 extern AVCodec cljr_decoder;
2165 extern AVCodec ffv1_decoder;
2166 extern AVCodec snow_decoder;
2167 extern AVCodec fourxm_decoder;
2168 extern AVCodec mdec_decoder;
2169 extern AVCodec roq_decoder;
2170 extern AVCodec interplay_video_decoder;
2171 extern AVCodec xan_wc3_decoder;
2172 extern AVCodec rpza_decoder;
2173 extern AVCodec cinepak_decoder;
2174 extern AVCodec msrle_decoder;
2175 extern AVCodec msvideo1_decoder;
2176 extern AVCodec vqa_decoder;
2177 extern AVCodec idcin_decoder;
2178 extern AVCodec eightbps_decoder;
2179 extern AVCodec smc_decoder;
2180 extern AVCodec flic_decoder;
2181 extern AVCodec vmdvideo_decoder;
2182 extern AVCodec vmdaudio_decoder;
2183 extern AVCodec truemotion1_decoder;
2184 extern AVCodec truemotion2_decoder;
2185 extern AVCodec mszh_decoder;
2186 extern AVCodec zlib_decoder;
2187 extern AVCodec ra_144_decoder;
2188 extern AVCodec ra_288_decoder;
2189 extern AVCodec roq_dpcm_decoder;
2190 extern AVCodec interplay_dpcm_decoder;
2191 extern AVCodec xan_dpcm_decoder;
2192 extern AVCodec sol_dpcm_decoder;
2193 extern AVCodec sonic_decoder;
2194 extern AVCodec qtrle_decoder;
2195 extern AVCodec flac_decoder;
2196 extern AVCodec tscc_decoder;
2197 extern AVCodec cscd_decoder;
2198 extern AVCodec nuv_decoder;
2199 extern AVCodec ulti_decoder;
2200 extern AVCodec qdraw_decoder;
2201 extern AVCodec xl_decoder;
2202 extern AVCodec qpeg_decoder;
2203 extern AVCodec shorten_decoder;
2204 extern AVCodec loco_decoder;
2205 extern AVCodec wnv1_decoder;
2206 extern AVCodec aasc_decoder;
2207 extern AVCodec alac_decoder;
2208 extern AVCodec ws_snd1_decoder;
2209 extern AVCodec indeo2_decoder;
2210 extern AVCodec vorbis_decoder;
2211 extern AVCodec fraps_decoder;
2212 extern AVCodec libgsm_encoder;
2213 extern AVCodec libgsm_decoder;
2214 extern AVCodec bmp_decoder;
2215 extern AVCodec mmvideo_decoder;
2216 extern AVCodec zmbv_decoder;
2217 extern AVCodec avs_decoder;
2218 extern AVCodec smacker_decoder;
2219 extern AVCodec smackaud_decoder;
2220 extern AVCodec kmvc_decoder;
2221 extern AVCodec flashsv_decoder;
2224 #define PCM_CODEC(id, name) \
2225 extern AVCodec name ## _decoder; \
2226 extern AVCodec name ## _encoder
2228 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2229 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2230 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2231 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2232 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2233 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2234 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2235 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2236 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2237 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2238 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2239 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2240 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2241 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2242 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2243 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2244 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2248 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2249 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2250 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2251 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2252 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2253 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2254 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2255 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2256 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2257 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2258 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2259 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2260 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2261 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2262 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2263 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2264 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2265 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2269 /* dummy raw video codec */
2270 extern AVCodec rawvideo_encoder;
2271 extern AVCodec rawvideo_decoder;
2273 /* the following codecs use external GPL libs */
2274 extern AVCodec ac3_decoder;
2275 extern AVCodec dts_decoder;
2278 extern AVCodec dvdsub_encoder;
2279 extern AVCodec dvdsub_decoder;
2280 extern AVCodec dvbsub_encoder;
2281 extern AVCodec dvbsub_decoder;
2285 struct ReSampleContext;
2286 struct AVResampleContext;
2288 typedef struct ReSampleContext ReSampleContext;
2290 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2291 int output_rate, int input_rate);
2292 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2293 void audio_resample_close(ReSampleContext *s);
2295 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2296 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2297 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2298 void av_resample_close(struct AVResampleContext *c);
2300 /* YUV420 format is assumed ! */
2302 struct ImgReSampleContext;
2304 typedef struct ImgReSampleContext ImgReSampleContext;
2306 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2307 int input_width, int input_height);
2309 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2310 int iwidth, int iheight,
2311 int topBand, int bottomBand,
2312 int leftBand, int rightBand,
2313 int padtop, int padbottom,
2314 int padleft, int padright);
2317 void img_resample(ImgReSampleContext *s,
2318 AVPicture *output, const AVPicture *input);
2320 void img_resample_close(ImgReSampleContext *s);
2323 * Allocate memory for a picture. Call avpicture_free to free it.
2325 * @param picture the picture to be filled in.
2326 * @param pix_fmt the format of the picture.
2327 * @param width the width of the picture.
2328 * @param height the height of the picture.
2329 * @return 0 if successful, -1 if not.
2331 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2333 /* Free a picture previously allocated by avpicture_alloc. */
2334 void avpicture_free(AVPicture *picture);
2336 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2337 int pix_fmt, int width, int height);
2338 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2339 unsigned char *dest, int dest_size);
2340 int avpicture_get_size(int pix_fmt, int width, int height);
2341 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2342 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2343 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2344 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2345 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2347 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2348 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2349 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2350 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2351 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2352 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2354 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2356 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2357 int has_alpha, int *loss_ptr);
2359 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2360 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2361 int img_get_alpha_info(const AVPicture *src,
2362 int pix_fmt, int width, int height);
2364 /* convert among pixel formats */
2365 int img_convert(AVPicture *dst, int dst_pix_fmt,
2366 const AVPicture *src, int pix_fmt,
2367 int width, int height);
2369 /* deinterlace a picture */
2370 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2371 int pix_fmt, int width, int height);
2373 /* external high level API */
2375 extern AVCodec *first_avcodec;
2377 /* returns LIBAVCODEC_VERSION_INT constant */
2378 unsigned avcodec_version(void);
2379 /* returns LIBAVCODEC_BUILD constant */
2380 unsigned avcodec_build(void);
2381 void avcodec_init(void);
2383 void register_avcodec(AVCodec *format);
2384 AVCodec *avcodec_find_encoder(enum CodecID id);
2385 AVCodec *avcodec_find_encoder_by_name(const char *name);
2386 AVCodec *avcodec_find_decoder(enum CodecID id);
2387 AVCodec *avcodec_find_decoder_by_name(const char *name);
2388 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2390 void avcodec_get_context_defaults(AVCodecContext *s);
2391 AVCodecContext *avcodec_alloc_context(void);
2392 void avcodec_get_frame_defaults(AVFrame *pic);
2393 AVFrame *avcodec_alloc_frame(void);
2395 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2396 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2397 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2398 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2399 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2400 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2402 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2403 void avcodec_thread_free(AVCodecContext *s);
2404 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2405 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2406 //FIXME func typedef
2409 * opens / inits the AVCodecContext.
2412 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2414 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2415 int *frame_size_ptr,
2416 uint8_t *buf, int buf_size);
2417 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2418 int *got_picture_ptr,
2419 uint8_t *buf, int buf_size);
2420 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2422 const uint8_t *buf, int buf_size);
2423 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2425 uint8_t *buf, int buf_size);
2426 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2427 const short *samples);
2428 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2429 const AVFrame *pict);
2430 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2431 const AVSubtitle *sub);
2433 int avcodec_close(AVCodecContext *avctx);
2435 void avcodec_register_all(void);
2437 void avcodec_flush_buffers(AVCodecContext *avctx);
2439 void avcodec_default_free_buffers(AVCodecContext *s);
2441 /* misc usefull functions */
2444 * returns a single letter to describe the picture type
2446 char av_get_pict_type_char(int pict_type);
2450 typedef struct AVCodecParserContext {
2452 struct AVCodecParser *parser;
2453 int64_t frame_offset; /* offset of the current frame */
2454 int64_t cur_offset; /* current offset
2455 (incremented by each av_parser_parse()) */
2456 int64_t last_frame_offset; /* offset of the last frame */
2458 int pict_type; /* XXX: put it back in AVCodecContext */
2459 int repeat_pict; /* XXX: put it back in AVCodecContext */
2460 int64_t pts; /* pts of the current frame */
2461 int64_t dts; /* dts of the current frame */
2466 int fetch_timestamp;
2468 #define AV_PARSER_PTS_NB 4
2469 int cur_frame_start_index;
2470 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2471 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2472 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2475 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2476 } AVCodecParserContext;
2478 typedef struct AVCodecParser {
2479 int codec_ids[5]; /* several codec IDs are permitted */
2481 int (*parser_init)(AVCodecParserContext *s);
2482 int (*parser_parse)(AVCodecParserContext *s,
2483 AVCodecContext *avctx,
2484 uint8_t **poutbuf, int *poutbuf_size,
2485 const uint8_t *buf, int buf_size);
2486 void (*parser_close)(AVCodecParserContext *s);
2487 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2488 struct AVCodecParser *next;
2491 extern AVCodecParser *av_first_parser;
2493 void av_register_codec_parser(AVCodecParser *parser);
2494 AVCodecParserContext *av_parser_init(int codec_id);
2495 int av_parser_parse(AVCodecParserContext *s,
2496 AVCodecContext *avctx,
2497 uint8_t **poutbuf, int *poutbuf_size,
2498 const uint8_t *buf, int buf_size,
2499 int64_t pts, int64_t dts);
2500 int av_parser_change(AVCodecParserContext *s,
2501 AVCodecContext *avctx,
2502 uint8_t **poutbuf, int *poutbuf_size,
2503 const uint8_t *buf, int buf_size, int keyframe);
2504 void av_parser_close(AVCodecParserContext *s);
2506 extern AVCodecParser mpegvideo_parser;
2507 extern AVCodecParser mpeg4video_parser;
2508 extern AVCodecParser h261_parser;
2509 extern AVCodecParser h263_parser;
2510 extern AVCodecParser h264_parser;
2511 extern AVCodecParser mjpeg_parser;
2512 extern AVCodecParser pnm_parser;
2513 extern AVCodecParser mpegaudio_parser;
2514 extern AVCodecParser ac3_parser;
2515 extern AVCodecParser dvdsub_parser;
2516 extern AVCodecParser dvbsub_parser;
2517 extern AVCodecParser aac_parser;
2520 void *av_malloc(unsigned int size);
2521 void *av_mallocz(unsigned int size);
2522 void *av_realloc(void *ptr, unsigned int size);
2523 void av_free(void *ptr);
2524 char *av_strdup(const char *s);
2525 void av_freep(void *ptr);
2526 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2527 /* for static data only */
2528 /* call av_free_static to release all staticaly allocated tables */
2529 void av_free_static(void);
2530 void *av_mallocz_static(unsigned int size);
2531 void *av_realloc_static(void *ptr, unsigned int size);
2533 void img_copy(AVPicture *dst, const AVPicture *src,
2534 int pix_fmt, int width, int height);
2536 int img_crop(AVPicture *dst, const AVPicture *src,
2537 int pix_fmt, int top_band, int left_band);
2539 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2540 int padtop, int padbottom, int padleft, int padright, int *color);
2546 #define AV_LOG_QUIET -1
2547 #define AV_LOG_ERROR 0
2548 #define AV_LOG_INFO 1
2549 #define AV_LOG_DEBUG 2
2552 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2554 extern void av_log(void*, int level, const char *fmt, ...);
2557 extern void av_vlog(void*, int level, const char *fmt, va_list);
2558 extern int av_log_get_level(void);
2559 extern void av_log_set_level(int);
2560 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2563 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2564 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2565 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2566 (((uint8_t*)(x))[1] << 16) | \
2567 (((uint8_t*)(x))[2] << 8) | \
2569 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2570 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2571 (((uint8_t*)(x))[2] << 16) | \
2572 (((uint8_t*)(x))[1] << 8) | \
2576 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2582 #endif /* AVCODEC_H */