2 * copyright (c) 2001 Fabrice Bellard
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 * external api header.
35 #include <sys/types.h> /* size_t */
37 #define AV_STRINGIFY(s) AV_TOSTRING(s)
38 #define AV_TOSTRING(s) #s
40 #define LIBAVCODEC_VERSION_INT ((51<<16)+(16<<8)+0)
41 #define LIBAVCODEC_VERSION 51.16.0
42 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
44 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
46 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
47 #define AV_TIME_BASE 1000000
48 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
53 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
54 CODEC_ID_MPEG2VIDEO_XVMC,
91 CODEC_ID_INTERPLAY_VIDEO,
103 CODEC_ID_TRUEMOTION1,
131 CODEC_ID_TRUEMOTION2,
148 /* various pcm "codecs" */
149 CODEC_ID_PCM_S16LE= 0x10000,
165 CODEC_ID_PCM_S24DAUD,
167 /* various adpcm codecs */
168 CODEC_ID_ADPCM_IMA_QT= 0x11000,
169 CODEC_ID_ADPCM_IMA_WAV,
170 CODEC_ID_ADPCM_IMA_DK3,
171 CODEC_ID_ADPCM_IMA_DK4,
172 CODEC_ID_ADPCM_IMA_WS,
173 CODEC_ID_ADPCM_IMA_SMJPEG,
182 CODEC_ID_ADPCM_YAMAHA,
183 CODEC_ID_ADPCM_SBPRO_4,
184 CODEC_ID_ADPCM_SBPRO_3,
185 CODEC_ID_ADPCM_SBPRO_2,
188 CODEC_ID_AMR_NB= 0x12000,
191 /* RealAudio codecs*/
192 CODEC_ID_RA_144= 0x13000,
195 /* various DPCM codecs */
196 CODEC_ID_ROQ_DPCM= 0x14000,
197 CODEC_ID_INTERPLAY_DPCM,
201 CODEC_ID_MP2= 0x15000,
202 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
221 CODEC_ID_WESTWOOD_SND1,
231 /* subtitle codecs */
232 CODEC_ID_DVD_SUBTITLE= 0x17000,
233 CODEC_ID_DVB_SUBTITLE,
235 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
236 stream (only used by libavformat) */
239 /* CODEC_ID_MP3LAME is absolete */
240 #define CODEC_ID_MP3LAME CODEC_ID_MP3
243 CODEC_TYPE_UNKNOWN = -1,
250 /* currently unused, may be used if 24/32 bits samples ever supported */
251 /* all in native endian */
253 SAMPLE_FMT_NONE = -1,
254 SAMPLE_FMT_U8, ///< unsigned 8 bits
255 SAMPLE_FMT_S16, ///< signed 16 bits
256 SAMPLE_FMT_S24, ///< signed 24 bits
257 SAMPLE_FMT_S32, ///< signed 32 bits
258 SAMPLE_FMT_FLT, ///< float
262 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
265 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
266 * this is mainly needed because some optimized bitstream readers read
267 * 32 or 64 bit at once and could read over the end<br>
268 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
269 * MPEG bitstreams could cause overread and segfault
271 #define FF_INPUT_BUFFER_PADDING_SIZE 8
274 * minimum encoding buffer size.
275 * used to avoid some checks during header writing
277 #define FF_MIN_BUFFER_SIZE 16384
279 /* motion estimation type, EPZS by default */
293 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
294 AVDISCARD_NONE =-16, ///< discard nothing
295 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
296 AVDISCARD_NONREF = 8, ///< discard all non reference
297 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
298 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
299 AVDISCARD_ALL = 48, ///< discard all
302 typedef struct RcOverride{
305 int qscale; // if this is 0 then quality_factor will be used instead
306 float quality_factor;
309 #define FF_MAX_B_FRAMES 16
312 these flags can be passed in AVCodecContext.flags before initing
313 Note: not everything is supported yet.
316 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
317 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
318 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
319 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
320 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
321 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
322 /* parent program gurantees that the input for b-frame containing streams is not written to
323 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
324 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
325 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
326 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
327 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
328 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
329 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
330 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
331 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
332 of only at frame boundaries */
333 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
334 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
335 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
336 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
337 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
338 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
339 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
340 /* Fx : Flag for h263+ extra options */
341 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
342 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
343 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
344 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
345 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
346 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
347 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
348 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
349 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
350 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
351 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
352 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
353 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
354 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
355 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
356 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
357 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
358 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
359 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
360 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
361 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
362 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
363 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
364 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
365 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
367 /* Unsupported options :
368 * Syntax Arithmetic coding (SAC)
369 * Reference Picture Selection
370 * Independant Segment Decoding */
372 /* codec capabilities */
374 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
376 * Codec uses get_buffer() for allocating buffers.
377 * direct rendering method 1
379 #define CODEC_CAP_DR1 0x0002
380 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
382 #define CODEC_CAP_PARSE_ONLY 0x0004
383 #define CODEC_CAP_TRUNCATED 0x0008
384 /* codec can export data for HW decoding (XvMC) */
385 #define CODEC_CAP_HWACCEL 0x0010
387 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
388 * if this is not set, the codec is guranteed to never be feeded with NULL data
390 #define CODEC_CAP_DELAY 0x0020
392 * Codec can be fed a final frame with a smaller size.
393 * This can be used to prevent truncation of the last audio samples.
395 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
397 //the following defines may change, don't expect compatibility if you use them
398 #define MB_TYPE_INTRA4x4 0x0001
399 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
400 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
401 #define MB_TYPE_16x16 0x0008
402 #define MB_TYPE_16x8 0x0010
403 #define MB_TYPE_8x16 0x0020
404 #define MB_TYPE_8x8 0x0040
405 #define MB_TYPE_INTERLACED 0x0080
406 #define MB_TYPE_DIRECT2 0x0100 //FIXME
407 #define MB_TYPE_ACPRED 0x0200
408 #define MB_TYPE_GMC 0x0400
409 #define MB_TYPE_SKIP 0x0800
410 #define MB_TYPE_P0L0 0x1000
411 #define MB_TYPE_P1L0 0x2000
412 #define MB_TYPE_P0L1 0x4000
413 #define MB_TYPE_P1L1 0x8000
414 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
415 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
416 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
417 #define MB_TYPE_QUANT 0x00010000
418 #define MB_TYPE_CBP 0x00020000
419 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
423 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
425 typedef struct AVPanScan{
428 * - encoding: set by user.
429 * - decoding: set by lavc
434 * width and height in 1/16 pel
435 * - encoding: set by user.
436 * - decoding: set by lavc
442 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
443 * - encoding: set by user.
444 * - decoding: set by lavc
446 int16_t position[3][2];
449 #define FF_COMMON_FRAME \
451 * pointer to the picture planes.\
452 * this might be different from the first allocated byte\
459 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
460 * this isn't used by lavc unless the default get/release_buffer() is used\
466 * 1 -> keyframe, 0-> not\
467 * - encoding: set by lavc\
468 * - decoding: set by lavc\
473 * picture type of the frame, see ?_TYPE below.\
474 * - encoding: set by lavc for coded_picture (and set by user for input)\
475 * - decoding: set by lavc\
480 * presentation timestamp in time_base units (time when frame should be shown to user)\
481 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
482 * - encoding: MUST be set by user\
483 * - decoding: set by lavc\
488 * picture number in bitstream order.\
489 * - encoding: set by\
490 * - decoding: set by lavc\
492 int coded_picture_number;\
494 * picture number in display order.\
495 * - encoding: set by\
496 * - decoding: set by lavc\
498 int display_picture_number;\
501 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
502 * - encoding: set by lavc for coded_picture (and set by user for input)\
503 * - decoding: set by lavc\
508 * buffer age (1->was last buffer and dint change, 2->..., ...).\
509 * set to INT_MAX if the buffer has not been used yet \
510 * - encoding: unused\
511 * - decoding: MUST be set by get_buffer()\
516 * is this picture used as reference\
517 * - encoding: unused\
518 * - decoding: set by lavc (before get_buffer() call))\
524 * - encoding: unused\
525 * - decoding: set by lavc\
527 int8_t *qscale_table;\
530 * - encoding: unused\
531 * - decoding: set by lavc\
536 * mbskip_table[mb]>=1 if MB didnt change\
537 * stride= mb_width = (width+15)>>4\
538 * - encoding: unused\
539 * - decoding: set by lavc\
541 uint8_t *mbskip_table;\
544 * Motion vector table.\
547 * int mv_sample_log2= 4 - motion_subsample_log2;\
548 * int mb_width= (width+15)>>4;\
549 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
550 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
552 * - encoding: set by user\
553 * - decoding: set by lavc\
555 int16_t (*motion_val[2])[2];\
558 * Macroblock type table\
559 * mb_type_base + mb_width + 2\
560 * - encoding: set by user\
561 * - decoding: set by lavc\
566 * log2 of the size of the block which a single vector in motion_val represents: \
567 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
568 * - encoding: unused\
569 * - decoding: set by lavc\
571 uint8_t motion_subsample_log2;\
574 * for some private data of the user\
575 * - encoding: unused\
576 * - decoding: set by user\
582 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
583 * - decoding: unused\
588 * type of the buffer (to keep track of who has to dealloc data[*])\
589 * - encoding: set by the one who allocs it\
590 * - decoding: set by the one who allocs it\
591 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
596 * when decoding, this signal how much the picture must be delayed.\
597 * extra_delay = repeat_pict / (2*fps)\
598 * - encoding: unused\
599 * - decoding: set by lavc\
609 * The content of the picture is interlaced.\
610 * - encoding: set by user\
611 * - decoding: set by lavc (default 0)\
613 int interlaced_frame;\
616 * if the content is interlaced, is top field displayed first.\
617 * - encoding: set by user\
618 * - decoding: set by lavc\
620 int top_field_first;\
624 * - encoding: set by user\
625 * - decoding: set by lavc\
627 AVPanScan *pan_scan;\
630 * tell user application that palette has changed from previous frame.\
631 * - encoding: ??? (no palette-enabled encoder yet)\
632 * - decoding: set by lavc (default 0)\
634 int palette_has_changed;\
637 * Codec suggestion on buffer type if != 0\
638 * - encoding: unused\
639 * - decoding: set by lavc (before get_buffer() call))\
645 * - encoding: unused\
646 * - decoding: set by lavc\
651 * Motion referece frame index\
652 * - encoding: set by user\
653 * - decoding: set by lavc\
655 int8_t *ref_index[2];
657 #define FF_QSCALE_TYPE_MPEG1 0
658 #define FF_QSCALE_TYPE_MPEG2 1
659 #define FF_QSCALE_TYPE_H264 2
661 #define FF_BUFFER_TYPE_INTERNAL 1
662 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
663 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
664 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
667 #define FF_I_TYPE 1 // Intra
668 #define FF_P_TYPE 2 // Predicted
669 #define FF_B_TYPE 3 // Bi-dir predicted
670 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
674 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
675 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
676 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
677 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
682 typedef struct AVFrame {
686 #define DEFAULT_FRAME_RATE_BASE 1001000
689 * main external api structure.
691 typedef struct AVCodecContext {
693 * Info on struct for av_log
694 * - set by avcodec_alloc_context
698 * the average bitrate.
699 * - encoding: set by user. unused for constant quantizer encoding
700 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
705 * number of bits the bitstream is allowed to diverge from the reference.
706 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
707 * - encoding: set by user. unused for constant quantizer encoding
710 int bit_rate_tolerance;
714 * - encoding: set by user.
715 * - decoding: set by user.
720 * some codecs needs additionnal format info. It is stored here
721 * - encoding: set by user.
722 * - decoding: set by lavc. (FIXME is this ok?)
727 * motion estimation algorithm used for video coding.
728 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
729 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
730 * - encoding: MUST be set by user.
736 * some codecs need / can use extra-data like huffman tables.
737 * mjpeg: huffman tables
738 * rv10: additional flags
739 * mpeg4: global headers (they can be in the bitstream or here)
740 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
741 * then extradata_size to avoid prolems if its read with the bitstream reader
742 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
743 * - encoding: set/allocated/freed by lavc.
744 * - decoding: set/allocated/freed by user.
750 * this is the fundamental unit of time (in seconds) in terms
751 * of which frame timestamps are represented. for fixed-fps content,
752 * timebase should be 1/framerate and timestamp increments should be
754 * - encoding: MUST be set by user
755 * - decoding: set by lavc.
757 AVRational time_base;
761 * picture width / height.
762 * - encoding: MUST be set by user.
763 * - decoding: set by lavc.
764 * Note, for compatibility its possible to set this instead of
765 * coded_width/height before decoding
769 #define FF_ASPECT_EXTENDED 15
772 * the number of pictures in a group of pitures, or 0 for intra_only.
773 * - encoding: set by user.
779 * pixel format, see PIX_FMT_xxx.
780 * - encoding: set by user.
781 * - decoding: set by lavc.
783 enum PixelFormat pix_fmt;
786 * Frame rate emulation. If not zero lower layer (i.e. format handler)
787 * has to read frames at native frame rate.
788 * - encoding: set by user.
789 * - decoding: unused.
794 * if non NULL, 'draw_horiz_band' is called by the libavcodec
795 * decoder to draw an horizontal band. It improve cache usage. Not
796 * all codecs can do that. You must check the codec capabilities
799 * - decoding: set by user.
800 * @param height the height of the slice
801 * @param y the y position of the slice
802 * @param type 1->top field, 2->bottom field, 3->frame
803 * @param offset offset into the AVFrame.data from which the slice should be read
805 void (*draw_horiz_band)(struct AVCodecContext *s,
806 const AVFrame *src, int offset[4],
807 int y, int type, int height);
810 int sample_rate; ///< samples per sec
814 * audio sample format.
815 * - encoding: set by user.
816 * - decoding: set by lavc.
818 enum SampleFormat sample_fmt; ///< sample format, currenly unused
820 /* the following data should not be initialized */
822 * samples per packet. initialized when calling 'init'
825 int frame_number; ///< audio or video frame number
826 int real_pict_num; ///< returns the real picture number of previous encoded frame
829 * number of frames the decoded output will be delayed relative to
831 * - encoding: set by lavc.
836 /* - encoding parameters */
837 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
838 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
842 * - encoding: set by user.
849 * - encoding: set by user.
855 * maximum quantizer difference etween frames.
856 * - encoding: set by user.
862 * maximum number of b frames between non b frames.
863 * note: the output will be delayed by max_b_frames+1 relative to the input
864 * - encoding: set by user.
870 * qscale factor between ip and b frames.
871 * - encoding: set by user.
874 float b_quant_factor;
876 /** obsolete FIXME remove */
878 #define FF_RC_STRATEGY_XVID 1
880 int b_frame_strategy;
884 * deprecated in favor of skip_idct and skip_frame
886 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
890 struct AVCodec *codec;
894 /* unused, FIXME remove*/
897 int rtp_payload_size; /* The size of the RTP payload: the coder will */
898 /* do it's best to deliver a chunk with size */
899 /* below rtp_payload_size, the chunk will start */
900 /* with a start code on some codecs like H.263 */
901 /* This doesn't take account of any particular */
902 /* headers inside the transmited RTP payload */
905 /* The RTP callback: This function is called */
906 /* every time the encoder has a packet to send */
907 /* Depends on the encoder if the data starts */
908 /* with a Start Code (it should) H.263 does. */
909 /* mb_nb contains the number of macroblocks */
910 /* encoded in the RTP payload */
911 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
913 /* statistics, used for 2-pass encoding */
924 * number of bits used for the previously encoded frame.
925 * - encoding: set by lavc
931 * private data of the user, can be used to carry app specific stuff.
932 * - encoding: set by user
933 * - decoding: set by user
938 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
939 enum CodecID codec_id; /* see CODEC_ID_xxx */
942 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
943 * this is used to workaround some encoder bugs
944 * - encoding: set by user, if not then the default based on codec_id will be used
945 * - decoding: set by user, will be converted to upper case by lavc during init
947 unsigned int codec_tag;
950 * workaround bugs in encoders which sometimes cannot be detected automatically.
951 * - encoding: set by user
952 * - decoding: set by user
955 #define FF_BUG_AUTODETECT 1 ///< autodetection
956 #define FF_BUG_OLD_MSMPEG4 2
957 #define FF_BUG_XVID_ILACE 4
958 #define FF_BUG_UMP4 8
959 #define FF_BUG_NO_PADDING 16
960 #define FF_BUG_AMV 32
961 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
962 #define FF_BUG_QPEL_CHROMA 64
963 #define FF_BUG_STD_QPEL 128
964 #define FF_BUG_QPEL_CHROMA2 256
965 #define FF_BUG_DIRECT_BLOCKSIZE 512
966 #define FF_BUG_EDGE 1024
967 #define FF_BUG_HPEL_CHROMA 2048
968 #define FF_BUG_DC_CLIP 4096
969 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
970 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
973 * luma single coeff elimination threshold.
974 * - encoding: set by user
977 int luma_elim_threshold;
980 * chroma single coeff elimination threshold.
981 * - encoding: set by user
984 int chroma_elim_threshold;
987 * strictly follow the std (MPEG4, ...).
988 * - encoding: set by user
991 int strict_std_compliance;
992 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
993 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
994 #define FF_COMPLIANCE_NORMAL 0
995 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
996 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
999 * qscale offset between ip and b frames.
1000 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1001 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1002 * - encoding: set by user.
1003 * - decoding: unused
1005 float b_quant_offset;
1008 * error resilience higher values will detect more errors but may missdetect
1009 * some more or less valid parts as errors.
1010 * - encoding: unused
1011 * - decoding: set by user
1013 int error_resilience;
1014 #define FF_ER_CAREFUL 1
1015 #define FF_ER_COMPLIANT 2
1016 #define FF_ER_AGGRESSIVE 3
1017 #define FF_ER_VERY_AGGRESSIVE 4
1020 * called at the beginning of each frame to get a buffer for it.
1021 * if pic.reference is set then the frame will be read later by lavc
1022 * avcodec_align_dimensions() should be used to find the required width and
1023 * height, as they normally need to be rounded up to the next multiple of 16
1024 * - encoding: unused
1025 * - decoding: set by lavc, user can override
1027 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1030 * called to release buffers which where allocated with get_buffer.
1031 * a released buffer can be reused in get_buffer()
1032 * pic.data[*] must be set to NULL
1033 * - encoding: unused
1034 * - decoding: set by lavc, user can override
1036 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1039 * if 1 the stream has a 1 frame delay during decoding.
1040 * - encoding: set by lavc
1041 * - decoding: set by lavc
1046 * number of bytes per packet if constant and known or 0
1047 * used by some WAV based audio codecs
1051 int parse_only; /* - decoding only: if true, only parsing is done
1052 (function avcodec_parse_frame()). The frame
1053 data is returned. Only MPEG codecs support this now. */
1056 * 0-> h263 quant 1-> mpeg quant.
1057 * - encoding: set by user.
1058 * - decoding: unused
1063 * pass1 encoding statistics output buffer.
1064 * - encoding: set by lavc
1065 * - decoding: unused
1070 * pass2 encoding statistics input buffer.
1071 * concatenated stuff from stats_out of pass1 should be placed here
1072 * - encoding: allocated/set/freed by user
1073 * - decoding: unused
1078 * ratecontrol qmin qmax limiting method.
1079 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1080 * - encoding: set by user.
1081 * - decoding: unused
1089 * ratecontrol override, see RcOverride.
1090 * - encoding: allocated/set/freed by user.
1091 * - decoding: unused
1093 RcOverride *rc_override;
1094 int rc_override_count;
1097 * rate control equation.
1098 * - encoding: set by user
1099 * - decoding: unused
1105 * - encoding: set by user.
1106 * - decoding: unused
1112 * - encoding: set by user.
1113 * - decoding: unused
1118 * decoder bitstream buffer size.
1119 * - encoding: set by user.
1120 * - decoding: unused
1123 float rc_buffer_aggressivity;
1126 * qscale factor between p and i frames.
1127 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1128 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1129 * - encoding: set by user.
1130 * - decoding: unused
1132 float i_quant_factor;
1135 * qscale offset between p and i frames.
1136 * - encoding: set by user.
1137 * - decoding: unused
1139 float i_quant_offset;
1142 * initial complexity for pass1 ratecontrol.
1143 * - encoding: set by user.
1144 * - decoding: unused
1146 float rc_initial_cplx;
1149 * dct algorithm, see FF_DCT_* below.
1150 * - encoding: set by user
1151 * - decoding: unused
1154 #define FF_DCT_AUTO 0
1155 #define FF_DCT_FASTINT 1
1156 #define FF_DCT_INT 2
1157 #define FF_DCT_MMX 3
1158 #define FF_DCT_MLIB 4
1159 #define FF_DCT_ALTIVEC 5
1160 #define FF_DCT_FAAN 6
1163 * luminance masking (0-> disabled).
1164 * - encoding: set by user
1165 * - decoding: unused
1170 * temporary complexity masking (0-> disabled).
1171 * - encoding: set by user
1172 * - decoding: unused
1174 float temporal_cplx_masking;
1177 * spatial complexity masking (0-> disabled).
1178 * - encoding: set by user
1179 * - decoding: unused
1181 float spatial_cplx_masking;
1184 * p block masking (0-> disabled).
1185 * - encoding: set by user
1186 * - decoding: unused
1191 * darkness masking (0-> disabled).
1192 * - encoding: set by user
1193 * - decoding: unused
1198 /* for binary compatibility */
1202 * idct algorithm, see FF_IDCT_* below.
1203 * - encoding: set by user
1204 * - decoding: set by user
1207 #define FF_IDCT_AUTO 0
1208 #define FF_IDCT_INT 1
1209 #define FF_IDCT_SIMPLE 2
1210 #define FF_IDCT_SIMPLEMMX 3
1211 #define FF_IDCT_LIBMPEG2MMX 4
1212 #define FF_IDCT_PS2 5
1213 #define FF_IDCT_MLIB 6
1214 #define FF_IDCT_ARM 7
1215 #define FF_IDCT_ALTIVEC 8
1216 #define FF_IDCT_SH4 9
1217 #define FF_IDCT_SIMPLEARM 10
1218 #define FF_IDCT_H264 11
1219 #define FF_IDCT_VP3 12
1220 #define FF_IDCT_IPP 13
1221 #define FF_IDCT_XVIDMMX 14
1222 #define FF_IDCT_CAVS 15
1223 #define FF_IDCT_SIMPLEARMV5TE 16
1227 * - encoding: set by lavc
1228 * - decoding: set by user (or 0)
1232 * slice offsets in the frame in bytes.
1233 * - encoding: set/allocated by lavc
1234 * - decoding: set/allocated by user (or NULL)
1239 * error concealment flags.
1240 * - encoding: unused
1241 * - decoding: set by user
1243 int error_concealment;
1244 #define FF_EC_GUESS_MVS 1
1245 #define FF_EC_DEBLOCK 2
1248 * dsp_mask could be add used to disable unwanted CPU features
1249 * CPU features (i.e. MMX, SSE. ...)
1251 * with FORCE flag you may instead enable given CPU features
1252 * (Dangerous: usable in case of misdetection, improper usage however will
1253 * result into program crash)
1256 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1257 /* lower 16 bits - CPU features */
1259 #define FF_MM_MMX 0x0001 /* standard MMX */
1260 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1261 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1262 #define FF_MM_SSE 0x0008 /* SSE functions */
1263 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1264 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1265 #endif /* HAVE_MMX */
1267 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1268 #endif /* HAVE_IWMMXT */
1271 * bits per sample/pixel from the demuxer (needed for huffyuv).
1272 * - encoding: set by lavc
1273 * - decoding: set by user
1275 int bits_per_sample;
1278 * prediction method (needed for huffyuv).
1279 * - encoding: set by user
1280 * - decoding: unused
1282 int prediction_method;
1283 #define FF_PRED_LEFT 0
1284 #define FF_PRED_PLANE 1
1285 #define FF_PRED_MEDIAN 2
1288 * sample aspect ratio (0 if unknown).
1289 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1290 * - encoding: set by user.
1291 * - decoding: set by lavc.
1293 AVRational sample_aspect_ratio;
1296 * the picture in the bitstream.
1297 * - encoding: set by lavc
1298 * - decoding: set by lavc
1300 AVFrame *coded_frame;
1304 * - encoding: set by user.
1305 * - decoding: set by user.
1308 #define FF_DEBUG_PICT_INFO 1
1309 #define FF_DEBUG_RC 2
1310 #define FF_DEBUG_BITSTREAM 4
1311 #define FF_DEBUG_MB_TYPE 8
1312 #define FF_DEBUG_QP 16
1313 #define FF_DEBUG_MV 32
1314 #define FF_DEBUG_DCT_COEFF 0x00000040
1315 #define FF_DEBUG_SKIP 0x00000080
1316 #define FF_DEBUG_STARTCODE 0x00000100
1317 #define FF_DEBUG_PTS 0x00000200
1318 #define FF_DEBUG_ER 0x00000400
1319 #define FF_DEBUG_MMCO 0x00000800
1320 #define FF_DEBUG_BUGS 0x00001000
1321 #define FF_DEBUG_VIS_QP 0x00002000
1322 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1326 * - encoding: set by user.
1327 * - decoding: set by user.
1330 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1331 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1332 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1336 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1337 * - decoding: unused
1342 * minimum MB quantizer.
1343 * - encoding: unused
1344 * - decoding: unused
1349 * maximum MB quantizer.
1350 * - encoding: unused
1351 * - decoding: unused
1356 * motion estimation compare function.
1357 * - encoding: set by user.
1358 * - decoding: unused
1362 * subpixel motion estimation compare function.
1363 * - encoding: set by user.
1364 * - decoding: unused
1368 * macroblock compare function (not supported yet).
1369 * - encoding: set by user.
1370 * - decoding: unused
1374 * interlaced dct compare function
1375 * - encoding: set by user.
1376 * - decoding: unused
1379 #define FF_CMP_SAD 0
1380 #define FF_CMP_SSE 1
1381 #define FF_CMP_SATD 2
1382 #define FF_CMP_DCT 3
1383 #define FF_CMP_PSNR 4
1384 #define FF_CMP_BIT 5
1386 #define FF_CMP_ZERO 7
1387 #define FF_CMP_VSAD 8
1388 #define FF_CMP_VSSE 9
1389 #define FF_CMP_NSSE 10
1390 #define FF_CMP_W53 11
1391 #define FF_CMP_W97 12
1392 #define FF_CMP_DCTMAX 13
1393 #define FF_CMP_DCT264 14
1394 #define FF_CMP_CHROMA 256
1397 * ME diamond size & shape.
1398 * - encoding: set by user.
1399 * - decoding: unused
1404 * amount of previous MV predictors (2a+1 x 2a+1 square).
1405 * - encoding: set by user.
1406 * - decoding: unused
1408 int last_predictor_count;
1411 * pre pass for motion estimation.
1412 * - encoding: set by user.
1413 * - decoding: unused
1418 * motion estimation pre pass compare function.
1419 * - encoding: set by user.
1420 * - decoding: unused
1425 * ME pre pass diamond size & shape.
1426 * - encoding: set by user.
1427 * - decoding: unused
1432 * subpel ME quality.
1433 * - encoding: set by user.
1434 * - decoding: unused
1436 int me_subpel_quality;
1439 * callback to negotiate the pixelFormat.
1440 * @param fmt is the list of formats which are supported by the codec,
1441 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1442 * the first is allways the native one
1443 * @return the choosen format
1444 * - encoding: unused
1445 * - decoding: set by user, if not set then the native format will always be choosen
1447 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1450 * DTG active format information (additionnal aspect ratio
1451 * information only used in DVB MPEG2 transport streams). 0 if
1454 * - encoding: unused.
1455 * - decoding: set by decoder
1457 int dtg_active_format;
1458 #define FF_DTG_AFD_SAME 8
1459 #define FF_DTG_AFD_4_3 9
1460 #define FF_DTG_AFD_16_9 10
1461 #define FF_DTG_AFD_14_9 11
1462 #define FF_DTG_AFD_4_3_SP_14_9 13
1463 #define FF_DTG_AFD_16_9_SP_14_9 14
1464 #define FF_DTG_AFD_SP_4_3 15
1467 * Maximum motion estimation search range in subpel units.
1468 * if 0 then no limit
1470 * - encoding: set by user.
1471 * - decoding: unused.
1476 * intra quantizer bias.
1477 * - encoding: set by user.
1478 * - decoding: unused
1480 int intra_quant_bias;
1481 #define FF_DEFAULT_QUANT_BIAS 999999
1484 * inter quantizer bias.
1485 * - encoding: set by user.
1486 * - decoding: unused
1488 int inter_quant_bias;
1492 * - encoding: unused.
1493 * - decoding: which clrtable should be used for 8bit RGB images
1494 * table have to be stored somewhere FIXME
1499 * internal_buffer count.
1500 * Don't touch, used by lavc default_get_buffer()
1502 int internal_buffer_count;
1506 * Don't touch, used by lavc default_get_buffer()
1508 void *internal_buffer;
1510 #define FF_LAMBDA_SHIFT 7
1511 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1512 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1513 #define FF_LAMBDA_MAX (256*128-1)
1515 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1517 * global quality for codecs which cannot change it per frame.
1518 * this should be proportional to MPEG1/2/4 qscale.
1519 * - encoding: set by user.
1520 * - decoding: unused
1524 #define FF_CODER_TYPE_VLC 0
1525 #define FF_CODER_TYPE_AC 1
1528 * - encoding: set by user.
1529 * - decoding: unused
1535 * - encoding: set by user.
1536 * - decoding: unused
1542 * - encoding: unused
1543 * - decoding: set by user.
1545 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1550 * - encoding: unused
1551 * - decoding: set by user.
1554 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1555 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1556 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1559 * XVideo Motion Acceleration
1560 * - encoding: forbidden
1561 * - decoding: set by decoder
1563 int xvmc_acceleration;
1566 * macroblock decision mode
1567 * - encoding: set by user.
1568 * - decoding: unused
1571 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1572 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1573 #define FF_MB_DECISION_RD 2 ///< rate distoration
1576 * custom intra quantization matrix
1577 * - encoding: set by user, can be NULL
1578 * - decoding: set by lavc
1580 uint16_t *intra_matrix;
1583 * custom inter quantization matrix
1584 * - encoding: set by user, can be NULL
1585 * - decoding: set by lavc
1587 uint16_t *inter_matrix;
1590 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1591 * this is used to workaround some encoder bugs
1592 * - encoding: unused
1593 * - decoding: set by user, will be converted to upper case by lavc during init
1595 unsigned int stream_codec_tag;
1598 * scene change detection threshold.
1599 * 0 is default, larger means fewer detected scene changes
1600 * - encoding: set by user.
1601 * - decoding: unused
1603 int scenechange_threshold;
1606 * minimum lagrange multipler
1607 * - encoding: set by user.
1608 * - decoding: unused
1613 * maximum lagrange multipler
1614 * - encoding: set by user.
1615 * - decoding: unused
1620 * Palette control structure
1621 * - encoding: ??? (no palette-enabled encoder yet)
1622 * - decoding: set by user.
1624 struct AVPaletteControl *palctrl;
1627 * noise reduction strength
1628 * - encoding: set by user.
1629 * - decoding: unused
1631 int noise_reduction;
1634 * called at the beginning of a frame to get cr buffer for it.
1635 * buffer type (size, hints) must be the same. lavc won't check it.
1636 * lavc will pass previous buffer in pic, function should return
1637 * same buffer or new buffer with old frame "painted" into it.
1638 * if pic.data[0] == NULL must behave like get_buffer().
1639 * - encoding: unused
1640 * - decoding: set by lavc, user can override
1642 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1645 * number of bits which should be loaded into the rc buffer before decoding starts
1646 * - encoding: set by user.
1647 * - decoding: unused
1649 int rc_initial_buffer_occupancy;
1653 * - encoding: set by user.
1654 * - decoding: unused
1656 int inter_threshold;
1660 * - encoding: set by user.
1661 * - decoding: set by user.
1666 * simulates errors in the bitstream to test error concealment.
1667 * - encoding: set by user.
1668 * - decoding: unused.
1673 * MP3 antialias algorithm, see FF_AA_* below.
1674 * - encoding: unused
1675 * - decoding: set by user
1678 #define FF_AA_AUTO 0
1679 #define FF_AA_FASTINT 1 //not implemented yet
1681 #define FF_AA_FLOAT 3
1683 * Quantizer noise shaping.
1684 * - encoding: set by user
1685 * - decoding: unused
1687 int quantizer_noise_shaping;
1691 * is used to decide how many independant tasks should be passed to execute()
1692 * - encoding: set by user
1693 * - decoding: set by user
1698 * the codec may call this to execute several independant things. it will return only after
1699 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1700 * default implementation will execute the parts serially
1701 * @param count the number of things to execute
1702 * - encoding: set by lavc, user can override
1703 * - decoding: set by lavc, user can override
1705 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1709 * can be used by execute() to store some per AVCodecContext stuff.
1710 * - encoding: set by execute()
1711 * - decoding: set by execute()
1713 void *thread_opaque;
1716 * Motion estimation threshold. under which no motion estimation is
1717 * performed, but instead the user specified motion vectors are used
1719 * - encoding: set by user
1720 * - decoding: unused
1725 * Macroblock threshold. under which the user specified macroblock types will be used
1726 * - encoding: set by user
1727 * - decoding: unused
1732 * precision of the intra dc coefficient - 8.
1733 * - encoding: set by user
1734 * - decoding: unused
1736 int intra_dc_precision;
1739 * noise vs. sse weight for the nsse comparsion function.
1740 * - encoding: set by user
1741 * - decoding: unused
1746 * number of macroblock rows at the top which are skipped.
1747 * - encoding: unused
1748 * - decoding: set by user
1753 * number of macroblock rows at the bottom which are skipped.
1754 * - encoding: unused
1755 * - decoding: set by user
1761 * - encoding: set by user
1762 * - decoding: set by lavc
1765 #define FF_PROFILE_UNKNOWN -99
1769 * - encoding: set by user
1770 * - decoding: set by lavc
1773 #define FF_LEVEL_UNKNOWN -99
1776 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1777 * - encoding: unused
1778 * - decoding: set by user
1783 * bitsream width / height. may be different from width/height if lowres
1784 * or other things are used
1785 * - encoding: unused
1786 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1788 int coded_width, coded_height;
1791 * frame skip threshold
1792 * - encoding: set by user
1793 * - decoding: unused
1795 int frame_skip_threshold;
1799 * - encoding: set by user
1800 * - decoding: unused
1802 int frame_skip_factor;
1805 * frame skip exponent
1806 * - encoding: set by user
1807 * - decoding: unused
1812 * frame skip comparission function
1813 * - encoding: set by user.
1814 * - decoding: unused
1819 * border processing masking. raises the quantizer for mbs on the borders
1821 * - encoding: set by user
1822 * - decoding: unused
1824 float border_masking;
1827 * minimum MB lagrange multipler.
1828 * - encoding: set by user.
1829 * - decoding: unused
1834 * maximum MB lagrange multipler.
1835 * - encoding: set by user.
1836 * - decoding: unused
1842 * - encoding: set by user.
1843 * - decoding: unused
1845 int me_penalty_compensation;
1849 * - encoding: unused
1850 * - decoding: set by user.
1852 enum AVDiscard skip_loop_filter;
1856 * - encoding: unused
1857 * - decoding: set by user.
1859 enum AVDiscard skip_idct;
1863 * - encoding: unused
1864 * - decoding: set by user.
1866 enum AVDiscard skip_frame;
1870 * - encoding: set by user.
1871 * - decoding: unused
1877 * - encoding: set by user.
1878 * - decoding: unused
1883 * constant rate factor - quality-based VBR - values ~correspond to qps
1884 * - encoding: set by user.
1885 * - decoding: unused
1890 * constant quantization parameter rate control method
1891 * - encoding: set by user.
1892 * - decoding: unused
1898 * - encoding: set by user.
1899 * - decoding: unused
1904 * number of reference frames
1905 * - encoding: set by user.
1906 * - decoding: unused
1911 * chroma qp offset from luma
1912 * - encoding: set by user.
1913 * - decoding: unused
1918 * influences how often b-frames are used
1919 * - encoding: set by user.
1920 * - decoding: unused
1925 * trellis RD quantization
1926 * - encoding: set by user.
1927 * - decoding: unused
1932 * reduce fluctuations in qp (before curve compression)
1933 * - encoding: set by user.
1934 * - decoding: unused
1936 float complexityblur;
1939 * in-loop deblocking filter alphac0 parameter
1940 * alpha is in the range -6...6
1941 * - encoding: set by user.
1942 * - decoding: unused
1947 * in-loop deblocking filter beta parameter
1948 * beta is in the range -6...6
1949 * - encoding: set by user.
1950 * - decoding: unused
1955 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1956 * - encoding: set by user.
1957 * - decoding: unused
1960 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1961 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1962 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1963 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1964 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1967 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1968 * - encoding: set by user.
1969 * - decoding: unused
1974 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1975 * - encoding: set by user.
1976 * - decoding: unused
1981 * multiplied by qscale for each frame and added to scene_change_score
1982 * - encoding: set by user.
1983 * - decoding: unused
1985 int scenechange_factor;
1989 * note: value depends upon the compare functin used for fullpel ME
1990 * - encoding: set by user.
1991 * - decoding: unused
1996 * adjusts sensitivity of b_frame_strategy 1
1997 * - encoding: set by user.
1998 * - decoding: unused
2003 * - encoding: set by user.
2004 * - decoding: unused
2006 int compression_level;
2007 #define FF_COMPRESSION_DEFAULT -1
2010 * sets whether to use LPC mode - used by FLAC encoder
2011 * - encoding: set by user.
2012 * - decoding: unused.
2017 * LPC coefficient precision - used by FLAC encoder
2018 * - encoding: set by user.
2019 * - decoding: unused.
2021 int lpc_coeff_precision;
2024 * - encoding: set by user.
2025 * - decoding: unused.
2027 int min_prediction_order;
2030 * - encoding: set by user.
2031 * - decoding: unused.
2033 int max_prediction_order;
2036 * search method for selecting prediction order
2037 * - encoding: set by user.
2038 * - decoding: unused.
2040 int prediction_order_method;
2043 * - encoding: set by user.
2044 * - decoding: unused.
2046 int min_partition_order;
2049 * - encoding: set by user.
2050 * - decoding: unused.
2052 int max_partition_order;
2058 typedef struct AVCodec {
2060 enum CodecType type;
2063 int (*init)(AVCodecContext *);
2064 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2065 int (*close)(AVCodecContext *);
2066 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2067 uint8_t *buf, int buf_size);
2069 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2070 void *dummy; // FIXME remove next time we break binary compatibility
2072 struct AVCodec *next;
2073 void (*flush)(AVCodecContext *);
2074 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2075 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2079 * four components are given, that's all.
2080 * the last component is alpha
2082 typedef struct AVPicture {
2084 int linesize[4]; ///< number of bytes per line
2089 * This structure defines a method for communicating palette changes
2090 * between and demuxer and a decoder.
2091 * this is totally broken, palette changes should be sent as AVPackets
2093 #define AVPALETTE_SIZE 1024
2094 #define AVPALETTE_COUNT 256
2095 typedef struct AVPaletteControl {
2097 /* demuxer sets this to 1 to indicate the palette has changed;
2098 * decoder resets to 0 */
2099 int palette_changed;
2101 /* 4-byte ARGB palette entries, stored in native byte order; note that
2102 * the individual palette components should be on a 8-bit scale; if
2103 * the palette data comes from a IBM VGA native format, the component
2104 * data is probably 6 bits in size and needs to be scaled */
2105 unsigned int palette[AVPALETTE_COUNT];
2107 } AVPaletteControl attribute_deprecated;
2109 typedef struct AVSubtitleRect {
2116 uint32_t *rgba_palette;
2120 typedef struct AVSubtitle {
2121 uint16_t format; /* 0 = graphics */
2122 uint32_t start_display_time; /* relative to packet pts, in ms */
2123 uint32_t end_display_time; /* relative to packet pts, in ms */
2125 AVSubtitleRect *rects;
2128 extern AVCodec ac3_encoder;
2129 extern AVCodec mp2_encoder;
2130 extern AVCodec mp3lame_encoder;
2131 extern AVCodec oggvorbis_encoder;
2132 extern AVCodec faac_encoder;
2133 extern AVCodec flac_encoder;
2134 extern AVCodec xvid_encoder;
2135 extern AVCodec mpeg1video_encoder;
2136 extern AVCodec mpeg2video_encoder;
2137 extern AVCodec h261_encoder;
2138 extern AVCodec h263_encoder;
2139 extern AVCodec h263p_encoder;
2140 extern AVCodec flv_encoder;
2141 extern AVCodec rv10_encoder;
2142 extern AVCodec rv20_encoder;
2143 extern AVCodec dvvideo_encoder;
2144 extern AVCodec mjpeg_encoder;
2145 extern AVCodec ljpeg_encoder;
2146 extern AVCodec jpegls_encoder;
2147 extern AVCodec png_encoder;
2148 extern AVCodec ppm_encoder;
2149 extern AVCodec pgm_encoder;
2150 extern AVCodec pgmyuv_encoder;
2151 extern AVCodec pbm_encoder;
2152 extern AVCodec pam_encoder;
2153 extern AVCodec mpeg4_encoder;
2154 extern AVCodec msmpeg4v1_encoder;
2155 extern AVCodec msmpeg4v2_encoder;
2156 extern AVCodec msmpeg4v3_encoder;
2157 extern AVCodec wmv1_encoder;
2158 extern AVCodec wmv2_encoder;
2159 extern AVCodec huffyuv_encoder;
2160 extern AVCodec ffvhuff_encoder;
2161 extern AVCodec h264_encoder;
2162 extern AVCodec asv1_encoder;
2163 extern AVCodec asv2_encoder;
2164 extern AVCodec vcr1_encoder;
2165 extern AVCodec ffv1_encoder;
2166 extern AVCodec snow_encoder;
2167 extern AVCodec vorbis_encoder;
2168 extern AVCodec mdec_encoder;
2169 extern AVCodec zlib_encoder;
2170 extern AVCodec sonic_encoder;
2171 extern AVCodec sonic_ls_encoder;
2172 extern AVCodec svq1_encoder;
2173 extern AVCodec x264_encoder;
2175 extern AVCodec h263_decoder;
2176 extern AVCodec h261_decoder;
2177 extern AVCodec mpeg4_decoder;
2178 extern AVCodec msmpeg4v1_decoder;
2179 extern AVCodec msmpeg4v2_decoder;
2180 extern AVCodec msmpeg4v3_decoder;
2181 extern AVCodec wmv1_decoder;
2182 extern AVCodec wmv2_decoder;
2183 extern AVCodec vc1_decoder;
2184 extern AVCodec wmv3_decoder;
2185 extern AVCodec mpeg1video_decoder;
2186 extern AVCodec mpeg2video_decoder;
2187 extern AVCodec mpegvideo_decoder;
2188 extern AVCodec mpeg_xvmc_decoder;
2189 extern AVCodec h263i_decoder;
2190 extern AVCodec flv_decoder;
2191 extern AVCodec rv10_decoder;
2192 extern AVCodec rv20_decoder;
2193 extern AVCodec rv30_decoder;
2194 extern AVCodec rv40_decoder;
2195 extern AVCodec svq1_decoder;
2196 extern AVCodec svq3_decoder;
2197 extern AVCodec dvvideo_decoder;
2198 extern AVCodec wmav1_decoder;
2199 extern AVCodec wmav2_decoder;
2200 extern AVCodec mjpeg_decoder;
2201 extern AVCodec mjpegb_decoder;
2202 extern AVCodec sp5x_decoder;
2203 extern AVCodec png_decoder;
2204 extern AVCodec mp2_decoder;
2205 extern AVCodec mp3_decoder;
2206 extern AVCodec mp3adu_decoder;
2207 extern AVCodec mp3on4_decoder;
2208 extern AVCodec qdm2_decoder;
2209 extern AVCodec cook_decoder;
2210 extern AVCodec truespeech_decoder;
2211 extern AVCodec tta_decoder;
2212 extern AVCodec mace3_decoder;
2213 extern AVCodec mace6_decoder;
2214 extern AVCodec huffyuv_decoder;
2215 extern AVCodec ffvhuff_decoder;
2216 extern AVCodec oggvorbis_decoder;
2217 extern AVCodec cyuv_decoder;
2218 extern AVCodec h264_decoder;
2219 extern AVCodec indeo3_decoder;
2220 extern AVCodec vp3_decoder;
2221 extern AVCodec theora_decoder;
2222 extern AVCodec vp5_decoder;
2223 extern AVCodec vp6_decoder;
2224 extern AVCodec vp6f_decoder;
2225 extern AVCodec amr_nb_decoder;
2226 extern AVCodec amr_nb_encoder;
2227 extern AVCodec amr_wb_encoder;
2228 extern AVCodec amr_wb_decoder;
2229 extern AVCodec aac_decoder;
2230 extern AVCodec mpeg4aac_decoder;
2231 extern AVCodec asv1_decoder;
2232 extern AVCodec asv2_decoder;
2233 extern AVCodec vcr1_decoder;
2234 extern AVCodec cljr_decoder;
2235 extern AVCodec ffv1_decoder;
2236 extern AVCodec snow_decoder;
2237 extern AVCodec fourxm_decoder;
2238 extern AVCodec mdec_decoder;
2239 extern AVCodec roq_decoder;
2240 extern AVCodec interplay_video_decoder;
2241 extern AVCodec xan_wc3_decoder;
2242 extern AVCodec rpza_decoder;
2243 extern AVCodec cinepak_decoder;
2244 extern AVCodec msrle_decoder;
2245 extern AVCodec msvideo1_decoder;
2246 extern AVCodec vqa_decoder;
2247 extern AVCodec idcin_decoder;
2248 extern AVCodec eightbps_decoder;
2249 extern AVCodec smc_decoder;
2250 extern AVCodec flic_decoder;
2251 extern AVCodec vmdvideo_decoder;
2252 extern AVCodec vmdaudio_decoder;
2253 extern AVCodec truemotion1_decoder;
2254 extern AVCodec truemotion2_decoder;
2255 extern AVCodec mszh_decoder;
2256 extern AVCodec zlib_decoder;
2257 extern AVCodec ra_144_decoder;
2258 extern AVCodec ra_288_decoder;
2259 extern AVCodec roq_dpcm_decoder;
2260 extern AVCodec interplay_dpcm_decoder;
2261 extern AVCodec xan_dpcm_decoder;
2262 extern AVCodec sol_dpcm_decoder;
2263 extern AVCodec sonic_decoder;
2264 extern AVCodec qtrle_decoder;
2265 extern AVCodec flac_decoder;
2266 extern AVCodec tscc_decoder;
2267 extern AVCodec cscd_decoder;
2268 extern AVCodec nuv_decoder;
2269 extern AVCodec ulti_decoder;
2270 extern AVCodec qdraw_decoder;
2271 extern AVCodec xl_decoder;
2272 extern AVCodec qpeg_decoder;
2273 extern AVCodec shorten_decoder;
2274 extern AVCodec loco_decoder;
2275 extern AVCodec wnv1_decoder;
2276 extern AVCodec aasc_decoder;
2277 extern AVCodec alac_decoder;
2278 extern AVCodec ws_snd1_decoder;
2279 extern AVCodec indeo2_decoder;
2280 extern AVCodec vorbis_decoder;
2281 extern AVCodec fraps_decoder;
2282 extern AVCodec libgsm_encoder;
2283 extern AVCodec libgsm_decoder;
2284 extern AVCodec bmp_decoder;
2285 extern AVCodec mmvideo_decoder;
2286 extern AVCodec zmbv_decoder;
2287 extern AVCodec avs_decoder;
2288 extern AVCodec smacker_decoder;
2289 extern AVCodec smackaud_decoder;
2290 extern AVCodec kmvc_decoder;
2291 extern AVCodec flashsv_decoder;
2292 extern AVCodec cavs_decoder;
2293 extern AVCodec vmnc_decoder;
2294 extern AVCodec wavpack_decoder;
2297 #define PCM_CODEC(id, name) \
2298 extern AVCodec name ## _decoder; \
2299 extern AVCodec name ## _encoder
2301 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2302 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2303 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2304 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2305 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2306 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2307 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2308 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2309 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2310 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2311 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2312 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2313 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2314 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2315 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2316 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2317 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2321 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2322 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2323 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2324 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2325 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2326 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2327 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2328 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2329 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2330 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2331 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2332 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2333 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2334 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2335 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2336 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2337 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2338 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2342 /* dummy raw video codec */
2343 extern AVCodec rawvideo_encoder;
2344 extern AVCodec rawvideo_decoder;
2346 /* the following codecs use external GPL libs */
2347 extern AVCodec ac3_decoder;
2348 extern AVCodec dts_decoder;
2351 extern AVCodec dvdsub_encoder;
2352 extern AVCodec dvdsub_decoder;
2353 extern AVCodec dvbsub_encoder;
2354 extern AVCodec dvbsub_decoder;
2358 struct ReSampleContext;
2359 struct AVResampleContext;
2361 typedef struct ReSampleContext ReSampleContext;
2363 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2364 int output_rate, int input_rate);
2365 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2366 void audio_resample_close(ReSampleContext *s);
2368 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2369 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2370 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2371 void av_resample_close(struct AVResampleContext *c);
2373 /* YUV420 format is assumed ! */
2375 struct ImgReSampleContext;
2377 typedef struct ImgReSampleContext ImgReSampleContext;
2379 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2380 int input_width, int input_height);
2382 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2383 int iwidth, int iheight,
2384 int topBand, int bottomBand,
2385 int leftBand, int rightBand,
2386 int padtop, int padbottom,
2387 int padleft, int padright);
2390 void img_resample(ImgReSampleContext *s,
2391 AVPicture *output, const AVPicture *input);
2393 void img_resample_close(ImgReSampleContext *s);
2396 * Allocate memory for a picture. Call avpicture_free to free it.
2398 * @param picture the picture to be filled in.
2399 * @param pix_fmt the format of the picture.
2400 * @param width the width of the picture.
2401 * @param height the height of the picture.
2402 * @return 0 if successful, -1 if not.
2404 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2406 /* Free a picture previously allocated by avpicture_alloc. */
2407 void avpicture_free(AVPicture *picture);
2409 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2410 int pix_fmt, int width, int height);
2411 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2412 unsigned char *dest, int dest_size);
2413 int avpicture_get_size(int pix_fmt, int width, int height);
2414 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2415 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2416 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2417 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2418 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2420 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2421 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2422 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2423 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2424 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2425 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2427 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2429 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2430 int has_alpha, int *loss_ptr);
2432 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2433 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2434 int img_get_alpha_info(const AVPicture *src,
2435 int pix_fmt, int width, int height);
2437 /* convert among pixel formats */
2438 int img_convert(AVPicture *dst, int dst_pix_fmt,
2439 const AVPicture *src, int pix_fmt,
2440 int width, int height);
2442 /* deinterlace a picture */
2443 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2444 int pix_fmt, int width, int height);
2446 /* external high level API */
2448 extern AVCodec *first_avcodec;
2450 /* returns LIBAVCODEC_VERSION_INT constant */
2451 unsigned avcodec_version(void);
2452 /* returns LIBAVCODEC_BUILD constant */
2453 unsigned avcodec_build(void);
2454 void avcodec_init(void);
2456 void register_avcodec(AVCodec *format);
2457 AVCodec *avcodec_find_encoder(enum CodecID id);
2458 AVCodec *avcodec_find_encoder_by_name(const char *name);
2459 AVCodec *avcodec_find_decoder(enum CodecID id);
2460 AVCodec *avcodec_find_decoder_by_name(const char *name);
2461 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2463 void avcodec_get_context_defaults(AVCodecContext *s);
2464 AVCodecContext *avcodec_alloc_context(void);
2465 void avcodec_get_frame_defaults(AVFrame *pic);
2466 AVFrame *avcodec_alloc_frame(void);
2468 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2469 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2470 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2471 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2472 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2473 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2475 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2476 void avcodec_thread_free(AVCodecContext *s);
2477 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2478 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2479 //FIXME func typedef
2482 * opens / inits the AVCodecContext.
2485 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2488 * Decode an audio frame.
2490 * @param avctx the codec context.
2491 * @param samples output buffer, 16 byte aligned
2492 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2493 * @param buf input buffer, 16 byte aligned
2494 * @param buf_size the input buffer size
2495 * @return 0 if successful, -1 if not.
2498 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2499 int *frame_size_ptr,
2500 uint8_t *buf, int buf_size);
2501 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2502 int *got_picture_ptr,
2503 uint8_t *buf, int buf_size);
2504 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2506 const uint8_t *buf, int buf_size);
2507 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2509 uint8_t *buf, int buf_size);
2510 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2511 const short *samples);
2512 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2513 const AVFrame *pict);
2514 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2515 const AVSubtitle *sub);
2517 int avcodec_close(AVCodecContext *avctx);
2519 void avcodec_register_all(void);
2521 void avcodec_flush_buffers(AVCodecContext *avctx);
2523 void avcodec_default_free_buffers(AVCodecContext *s);
2525 /* misc usefull functions */
2528 * returns a single letter to describe the picture type
2530 char av_get_pict_type_char(int pict_type);
2533 * returns codec bits per sample
2535 int av_get_bits_per_sample(enum CodecID codec_id);
2538 typedef struct AVCodecParserContext {
2540 struct AVCodecParser *parser;
2541 int64_t frame_offset; /* offset of the current frame */
2542 int64_t cur_offset; /* current offset
2543 (incremented by each av_parser_parse()) */
2544 int64_t last_frame_offset; /* offset of the last frame */
2546 int pict_type; /* XXX: put it back in AVCodecContext */
2547 int repeat_pict; /* XXX: put it back in AVCodecContext */
2548 int64_t pts; /* pts of the current frame */
2549 int64_t dts; /* dts of the current frame */
2554 int fetch_timestamp;
2556 #define AV_PARSER_PTS_NB 4
2557 int cur_frame_start_index;
2558 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2559 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2560 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2563 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2564 } AVCodecParserContext;
2566 typedef struct AVCodecParser {
2567 int codec_ids[5]; /* several codec IDs are permitted */
2569 int (*parser_init)(AVCodecParserContext *s);
2570 int (*parser_parse)(AVCodecParserContext *s,
2571 AVCodecContext *avctx,
2572 uint8_t **poutbuf, int *poutbuf_size,
2573 const uint8_t *buf, int buf_size);
2574 void (*parser_close)(AVCodecParserContext *s);
2575 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2576 struct AVCodecParser *next;
2579 extern AVCodecParser *av_first_parser;
2581 void av_register_codec_parser(AVCodecParser *parser);
2582 AVCodecParserContext *av_parser_init(int codec_id);
2583 int av_parser_parse(AVCodecParserContext *s,
2584 AVCodecContext *avctx,
2585 uint8_t **poutbuf, int *poutbuf_size,
2586 const uint8_t *buf, int buf_size,
2587 int64_t pts, int64_t dts);
2588 int av_parser_change(AVCodecParserContext *s,
2589 AVCodecContext *avctx,
2590 uint8_t **poutbuf, int *poutbuf_size,
2591 const uint8_t *buf, int buf_size, int keyframe);
2592 void av_parser_close(AVCodecParserContext *s);
2594 extern AVCodecParser mpegvideo_parser;
2595 extern AVCodecParser mpeg4video_parser;
2596 extern AVCodecParser cavsvideo_parser;
2597 extern AVCodecParser h261_parser;
2598 extern AVCodecParser h263_parser;
2599 extern AVCodecParser h264_parser;
2600 extern AVCodecParser mjpeg_parser;
2601 extern AVCodecParser pnm_parser;
2602 extern AVCodecParser mpegaudio_parser;
2603 extern AVCodecParser ac3_parser;
2604 extern AVCodecParser dvdsub_parser;
2605 extern AVCodecParser dvbsub_parser;
2606 extern AVCodecParser aac_parser;
2609 typedef struct AVBitStreamFilterContext {
2611 struct AVBitStreamFilter *filter;
2612 AVCodecParserContext *parser;
2613 struct AVBitStreamFilterContext *next;
2614 } AVBitStreamFilterContext;
2617 typedef struct AVBitStreamFilter {
2620 int (*filter)(AVBitStreamFilterContext *bsfc,
2621 AVCodecContext *avctx, const char *args,
2622 uint8_t **poutbuf, int *poutbuf_size,
2623 const uint8_t *buf, int buf_size, int keyframe);
2624 struct AVBitStreamFilter *next;
2625 } AVBitStreamFilter;
2627 extern AVBitStreamFilter *av_first_bitstream_filter;
2629 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2630 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2631 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2632 AVCodecContext *avctx, const char *args,
2633 uint8_t **poutbuf, int *poutbuf_size,
2634 const uint8_t *buf, int buf_size, int keyframe);
2635 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2637 extern AVBitStreamFilter dump_extradata_bsf;
2638 extern AVBitStreamFilter remove_extradata_bsf;
2639 extern AVBitStreamFilter noise_bsf;
2643 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2644 /* for static data only */
2645 /* call av_free_static to release all staticaly allocated tables */
2646 void av_free_static(void);
2647 void *av_mallocz_static(unsigned int size);
2648 void *av_realloc_static(void *ptr, unsigned int size);
2650 void img_copy(AVPicture *dst, const AVPicture *src,
2651 int pix_fmt, int width, int height);
2653 int img_crop(AVPicture *dst, const AVPicture *src,
2654 int pix_fmt, int top_band, int left_band);
2656 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2657 int padtop, int padbottom, int padleft, int padright, int *color);
2660 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2661 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2662 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2663 (((uint8_t*)(x))[1] << 16) | \
2664 (((uint8_t*)(x))[2] << 8) | \
2666 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2667 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2668 (((uint8_t*)(x))[2] << 16) | \
2669 (((uint8_t*)(x))[1] << 8) | \
2673 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2679 #endif /* AVCODEC_H */