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)+(17<<8)+0)
41 #define LIBAVCODEC_VERSION 51.17.0
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,
149 /* various pcm "codecs" */
150 CODEC_ID_PCM_S16LE= 0x10000,
166 CODEC_ID_PCM_S24DAUD,
168 /* various adpcm codecs */
169 CODEC_ID_ADPCM_IMA_QT= 0x11000,
170 CODEC_ID_ADPCM_IMA_WAV,
171 CODEC_ID_ADPCM_IMA_DK3,
172 CODEC_ID_ADPCM_IMA_DK4,
173 CODEC_ID_ADPCM_IMA_WS,
174 CODEC_ID_ADPCM_IMA_SMJPEG,
183 CODEC_ID_ADPCM_YAMAHA,
184 CODEC_ID_ADPCM_SBPRO_4,
185 CODEC_ID_ADPCM_SBPRO_3,
186 CODEC_ID_ADPCM_SBPRO_2,
189 CODEC_ID_AMR_NB= 0x12000,
192 /* RealAudio codecs*/
193 CODEC_ID_RA_144= 0x13000,
196 /* various DPCM codecs */
197 CODEC_ID_ROQ_DPCM= 0x14000,
198 CODEC_ID_INTERPLAY_DPCM,
202 CODEC_ID_MP2= 0x15000,
203 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
222 CODEC_ID_WESTWOOD_SND1,
232 /* subtitle codecs */
233 CODEC_ID_DVD_SUBTITLE= 0x17000,
234 CODEC_ID_DVB_SUBTITLE,
236 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
237 stream (only used by libavformat) */
240 /* CODEC_ID_MP3LAME is absolete */
241 #define CODEC_ID_MP3LAME CODEC_ID_MP3
244 CODEC_TYPE_UNKNOWN = -1,
251 /* currently unused, may be used if 24/32 bits samples ever supported */
252 /* all in native endian */
254 SAMPLE_FMT_NONE = -1,
255 SAMPLE_FMT_U8, ///< unsigned 8 bits
256 SAMPLE_FMT_S16, ///< signed 16 bits
257 SAMPLE_FMT_S24, ///< signed 24 bits
258 SAMPLE_FMT_S32, ///< signed 32 bits
259 SAMPLE_FMT_FLT, ///< float
263 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
266 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
267 * this is mainly needed because some optimized bitstream readers read
268 * 32 or 64 bit at once and could read over the end<br>
269 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
270 * MPEG bitstreams could cause overread and segfault
272 #define FF_INPUT_BUFFER_PADDING_SIZE 8
275 * minimum encoding buffer size.
276 * used to avoid some checks during header writing
278 #define FF_MIN_BUFFER_SIZE 16384
280 /* motion estimation type, EPZS by default */
294 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
295 AVDISCARD_NONE =-16, ///< discard nothing
296 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
297 AVDISCARD_NONREF = 8, ///< discard all non reference
298 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
299 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
300 AVDISCARD_ALL = 48, ///< discard all
303 typedef struct RcOverride{
306 int qscale; // if this is 0 then quality_factor will be used instead
307 float quality_factor;
310 #define FF_MAX_B_FRAMES 16
313 these flags can be passed in AVCodecContext.flags before initing
314 Note: not everything is supported yet.
317 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
318 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
319 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
320 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
321 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
322 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
323 /* parent program gurantees that the input for b-frame containing streams is not written to
324 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
325 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
326 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
327 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
328 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
329 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
330 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
331 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
332 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
333 of only at frame boundaries */
334 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
335 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
336 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
337 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
338 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
339 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
340 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
341 /* Fx : Flag for h263+ extra options */
342 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
343 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
344 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
345 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
346 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
347 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
348 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
349 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
350 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
351 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
352 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
353 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
354 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
355 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
356 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
357 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
358 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
359 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
360 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
361 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
362 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
363 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
364 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
365 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
366 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
368 /* Unsupported options :
369 * Syntax Arithmetic coding (SAC)
370 * Reference Picture Selection
371 * Independant Segment Decoding */
373 /* codec capabilities */
375 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
377 * Codec uses get_buffer() for allocating buffers.
378 * direct rendering method 1
380 #define CODEC_CAP_DR1 0x0002
381 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
383 #define CODEC_CAP_PARSE_ONLY 0x0004
384 #define CODEC_CAP_TRUNCATED 0x0008
385 /* codec can export data for HW decoding (XvMC) */
386 #define CODEC_CAP_HWACCEL 0x0010
388 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
389 * if this is not set, the codec is guranteed to never be feeded with NULL data
391 #define CODEC_CAP_DELAY 0x0020
393 * Codec can be fed a final frame with a smaller size.
394 * This can be used to prevent truncation of the last audio samples.
396 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
398 //the following defines may change, don't expect compatibility if you use them
399 #define MB_TYPE_INTRA4x4 0x0001
400 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
401 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
402 #define MB_TYPE_16x16 0x0008
403 #define MB_TYPE_16x8 0x0010
404 #define MB_TYPE_8x16 0x0020
405 #define MB_TYPE_8x8 0x0040
406 #define MB_TYPE_INTERLACED 0x0080
407 #define MB_TYPE_DIRECT2 0x0100 //FIXME
408 #define MB_TYPE_ACPRED 0x0200
409 #define MB_TYPE_GMC 0x0400
410 #define MB_TYPE_SKIP 0x0800
411 #define MB_TYPE_P0L0 0x1000
412 #define MB_TYPE_P1L0 0x2000
413 #define MB_TYPE_P0L1 0x4000
414 #define MB_TYPE_P1L1 0x8000
415 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
416 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
417 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
418 #define MB_TYPE_QUANT 0x00010000
419 #define MB_TYPE_CBP 0x00020000
420 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
424 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
426 typedef struct AVPanScan{
429 * - encoding: set by user.
430 * - decoding: set by lavc
435 * width and height in 1/16 pel
436 * - encoding: set by user.
437 * - decoding: set by lavc
443 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
444 * - encoding: set by user.
445 * - decoding: set by lavc
447 int16_t position[3][2];
450 #define FF_COMMON_FRAME \
452 * pointer to the picture planes.\
453 * this might be different from the first allocated byte\
460 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
461 * this isn't used by lavc unless the default get/release_buffer() is used\
467 * 1 -> keyframe, 0-> not\
468 * - encoding: set by lavc\
469 * - decoding: set by lavc\
474 * picture type of the frame, see ?_TYPE below.\
475 * - encoding: set by lavc for coded_picture (and set by user for input)\
476 * - decoding: set by lavc\
481 * presentation timestamp in time_base units (time when frame should be shown to user)\
482 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
483 * - encoding: MUST be set by user\
484 * - decoding: set by lavc\
489 * picture number in bitstream order.\
490 * - encoding: set by\
491 * - decoding: set by lavc\
493 int coded_picture_number;\
495 * picture number in display order.\
496 * - encoding: set by\
497 * - decoding: set by lavc\
499 int display_picture_number;\
502 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
503 * - encoding: set by lavc for coded_picture (and set by user for input)\
504 * - decoding: set by lavc\
509 * buffer age (1->was last buffer and dint change, 2->..., ...).\
510 * set to INT_MAX if the buffer has not been used yet \
511 * - encoding: unused\
512 * - decoding: MUST be set by get_buffer()\
517 * is this picture used as reference\
518 * - encoding: unused\
519 * - decoding: set by lavc (before get_buffer() call))\
525 * - encoding: unused\
526 * - decoding: set by lavc\
528 int8_t *qscale_table;\
531 * - encoding: unused\
532 * - decoding: set by lavc\
537 * mbskip_table[mb]>=1 if MB didnt change\
538 * stride= mb_width = (width+15)>>4\
539 * - encoding: unused\
540 * - decoding: set by lavc\
542 uint8_t *mbskip_table;\
545 * Motion vector table.\
548 * int mv_sample_log2= 4 - motion_subsample_log2;\
549 * int mb_width= (width+15)>>4;\
550 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
551 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
553 * - encoding: set by user\
554 * - decoding: set by lavc\
556 int16_t (*motion_val[2])[2];\
559 * Macroblock type table\
560 * mb_type_base + mb_width + 2\
561 * - encoding: set by user\
562 * - decoding: set by lavc\
567 * log2 of the size of the block which a single vector in motion_val represents: \
568 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
569 * - encoding: unused\
570 * - decoding: set by lavc\
572 uint8_t motion_subsample_log2;\
575 * for some private data of the user\
576 * - encoding: unused\
577 * - decoding: set by user\
583 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
584 * - decoding: unused\
589 * type of the buffer (to keep track of who has to dealloc data[*])\
590 * - encoding: set by the one who allocs it\
591 * - decoding: set by the one who allocs it\
592 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
597 * when decoding, this signal how much the picture must be delayed.\
598 * extra_delay = repeat_pict / (2*fps)\
599 * - encoding: unused\
600 * - decoding: set by lavc\
610 * The content of the picture is interlaced.\
611 * - encoding: set by user\
612 * - decoding: set by lavc (default 0)\
614 int interlaced_frame;\
617 * if the content is interlaced, is top field displayed first.\
618 * - encoding: set by user\
619 * - decoding: set by lavc\
621 int top_field_first;\
625 * - encoding: set by user\
626 * - decoding: set by lavc\
628 AVPanScan *pan_scan;\
631 * tell user application that palette has changed from previous frame.\
632 * - encoding: ??? (no palette-enabled encoder yet)\
633 * - decoding: set by lavc (default 0)\
635 int palette_has_changed;\
638 * Codec suggestion on buffer type if != 0\
639 * - encoding: unused\
640 * - decoding: set by lavc (before get_buffer() call))\
646 * - encoding: unused\
647 * - decoding: set by lavc\
652 * Motion referece frame index\
653 * - encoding: set by user\
654 * - decoding: set by lavc\
656 int8_t *ref_index[2];
658 #define FF_QSCALE_TYPE_MPEG1 0
659 #define FF_QSCALE_TYPE_MPEG2 1
660 #define FF_QSCALE_TYPE_H264 2
662 #define FF_BUFFER_TYPE_INTERNAL 1
663 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
664 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
665 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
668 #define FF_I_TYPE 1 // Intra
669 #define FF_P_TYPE 2 // Predicted
670 #define FF_B_TYPE 3 // Bi-dir predicted
671 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
675 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
676 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
677 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
678 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
683 typedef struct AVFrame {
687 #define DEFAULT_FRAME_RATE_BASE 1001000
690 * main external api structure.
692 typedef struct AVCodecContext {
694 * Info on struct for av_log
695 * - set by avcodec_alloc_context
699 * the average bitrate.
700 * - encoding: set by user. unused for constant quantizer encoding
701 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
706 * number of bits the bitstream is allowed to diverge from the reference.
707 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
708 * - encoding: set by user. unused for constant quantizer encoding
711 int bit_rate_tolerance;
715 * - encoding: set by user.
716 * - decoding: set by user.
721 * some codecs needs additionnal format info. It is stored here
722 * - encoding: set by user.
723 * - decoding: set by lavc. (FIXME is this ok?)
728 * motion estimation algorithm used for video coding.
729 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
730 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
731 * - encoding: MUST be set by user.
737 * some codecs need / can use extra-data like huffman tables.
738 * mjpeg: huffman tables
739 * rv10: additional flags
740 * mpeg4: global headers (they can be in the bitstream or here)
741 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
742 * then extradata_size to avoid prolems if its read with the bitstream reader
743 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
744 * - encoding: set/allocated/freed by lavc.
745 * - decoding: set/allocated/freed by user.
751 * this is the fundamental unit of time (in seconds) in terms
752 * of which frame timestamps are represented. for fixed-fps content,
753 * timebase should be 1/framerate and timestamp increments should be
755 * - encoding: MUST be set by user
756 * - decoding: set by lavc.
758 AVRational time_base;
762 * picture width / height.
763 * - encoding: MUST be set by user.
764 * - decoding: set by lavc.
765 * Note, for compatibility its possible to set this instead of
766 * coded_width/height before decoding
770 #define FF_ASPECT_EXTENDED 15
773 * the number of pictures in a group of pitures, or 0 for intra_only.
774 * - encoding: set by user.
780 * pixel format, see PIX_FMT_xxx.
781 * - encoding: set by user.
782 * - decoding: set by lavc.
784 enum PixelFormat pix_fmt;
787 * Frame rate emulation. If not zero lower layer (i.e. format handler)
788 * has to read frames at native frame rate.
789 * - encoding: set by user.
790 * - decoding: unused.
795 * if non NULL, 'draw_horiz_band' is called by the libavcodec
796 * decoder to draw an horizontal band. It improve cache usage. Not
797 * all codecs can do that. You must check the codec capabilities
800 * - decoding: set by user.
801 * @param height the height of the slice
802 * @param y the y position of the slice
803 * @param type 1->top field, 2->bottom field, 3->frame
804 * @param offset offset into the AVFrame.data from which the slice should be read
806 void (*draw_horiz_band)(struct AVCodecContext *s,
807 const AVFrame *src, int offset[4],
808 int y, int type, int height);
811 int sample_rate; ///< samples per sec
815 * audio sample format.
816 * - encoding: set by user.
817 * - decoding: set by lavc.
819 enum SampleFormat sample_fmt; ///< sample format, currenly unused
821 /* the following data should not be initialized */
823 * samples per packet. initialized when calling 'init'
826 int frame_number; ///< audio or video frame number
827 int real_pict_num; ///< returns the real picture number of previous encoded frame
830 * number of frames the decoded output will be delayed relative to
832 * - encoding: set by lavc.
837 /* - encoding parameters */
838 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
839 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
843 * - encoding: set by user.
850 * - encoding: set by user.
856 * maximum quantizer difference etween frames.
857 * - encoding: set by user.
863 * maximum number of b frames between non b frames.
864 * note: the output will be delayed by max_b_frames+1 relative to the input
865 * - encoding: set by user.
871 * qscale factor between ip and b frames.
872 * - encoding: set by user.
875 float b_quant_factor;
877 /** obsolete FIXME remove */
879 #define FF_RC_STRATEGY_XVID 1
881 int b_frame_strategy;
885 * deprecated in favor of skip_idct and skip_frame
887 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
891 struct AVCodec *codec;
895 /* unused, FIXME remove*/
898 int rtp_payload_size; /* The size of the RTP payload: the coder will */
899 /* do it's best to deliver a chunk with size */
900 /* below rtp_payload_size, the chunk will start */
901 /* with a start code on some codecs like H.263 */
902 /* This doesn't take account of any particular */
903 /* headers inside the transmited RTP payload */
906 /* The RTP callback: This function is called */
907 /* every time the encoder has a packet to send */
908 /* Depends on the encoder if the data starts */
909 /* with a Start Code (it should) H.263 does. */
910 /* mb_nb contains the number of macroblocks */
911 /* encoded in the RTP payload */
912 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
914 /* statistics, used for 2-pass encoding */
925 * number of bits used for the previously encoded frame.
926 * - encoding: set by lavc
932 * private data of the user, can be used to carry app specific stuff.
933 * - encoding: set by user
934 * - decoding: set by user
939 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
940 enum CodecID codec_id; /* see CODEC_ID_xxx */
943 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
944 * this is used to workaround some encoder bugs
945 * - encoding: set by user, if not then the default based on codec_id will be used
946 * - decoding: set by user, will be converted to upper case by lavc during init
948 unsigned int codec_tag;
951 * workaround bugs in encoders which sometimes cannot be detected automatically.
952 * - encoding: set by user
953 * - decoding: set by user
956 #define FF_BUG_AUTODETECT 1 ///< autodetection
957 #define FF_BUG_OLD_MSMPEG4 2
958 #define FF_BUG_XVID_ILACE 4
959 #define FF_BUG_UMP4 8
960 #define FF_BUG_NO_PADDING 16
961 #define FF_BUG_AMV 32
962 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
963 #define FF_BUG_QPEL_CHROMA 64
964 #define FF_BUG_STD_QPEL 128
965 #define FF_BUG_QPEL_CHROMA2 256
966 #define FF_BUG_DIRECT_BLOCKSIZE 512
967 #define FF_BUG_EDGE 1024
968 #define FF_BUG_HPEL_CHROMA 2048
969 #define FF_BUG_DC_CLIP 4096
970 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
971 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
974 * luma single coeff elimination threshold.
975 * - encoding: set by user
978 int luma_elim_threshold;
981 * chroma single coeff elimination threshold.
982 * - encoding: set by user
985 int chroma_elim_threshold;
988 * strictly follow the std (MPEG4, ...).
989 * - encoding: set by user
992 int strict_std_compliance;
993 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
994 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
995 #define FF_COMPLIANCE_NORMAL 0
996 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
997 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1000 * qscale offset between ip and b frames.
1001 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1002 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1003 * - encoding: set by user.
1004 * - decoding: unused
1006 float b_quant_offset;
1009 * error resilience higher values will detect more errors but may missdetect
1010 * some more or less valid parts as errors.
1011 * - encoding: unused
1012 * - decoding: set by user
1014 int error_resilience;
1015 #define FF_ER_CAREFUL 1
1016 #define FF_ER_COMPLIANT 2
1017 #define FF_ER_AGGRESSIVE 3
1018 #define FF_ER_VERY_AGGRESSIVE 4
1021 * called at the beginning of each frame to get a buffer for it.
1022 * if pic.reference is set then the frame will be read later by lavc
1023 * avcodec_align_dimensions() should be used to find the required width and
1024 * height, as they normally need to be rounded up to the next multiple of 16
1025 * - encoding: unused
1026 * - decoding: set by lavc, user can override
1028 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1031 * called to release buffers which where allocated with get_buffer.
1032 * a released buffer can be reused in get_buffer()
1033 * pic.data[*] must be set to NULL
1034 * - encoding: unused
1035 * - decoding: set by lavc, user can override
1037 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1040 * if 1 the stream has a 1 frame delay during decoding.
1041 * - encoding: set by lavc
1042 * - decoding: set by lavc
1047 * number of bytes per packet if constant and known or 0
1048 * used by some WAV based audio codecs
1052 int parse_only; /* - decoding only: if true, only parsing is done
1053 (function avcodec_parse_frame()). The frame
1054 data is returned. Only MPEG codecs support this now. */
1057 * 0-> h263 quant 1-> mpeg quant.
1058 * - encoding: set by user.
1059 * - decoding: unused
1064 * pass1 encoding statistics output buffer.
1065 * - encoding: set by lavc
1066 * - decoding: unused
1071 * pass2 encoding statistics input buffer.
1072 * concatenated stuff from stats_out of pass1 should be placed here
1073 * - encoding: allocated/set/freed by user
1074 * - decoding: unused
1079 * ratecontrol qmin qmax limiting method.
1080 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1081 * - encoding: set by user.
1082 * - decoding: unused
1090 * ratecontrol override, see RcOverride.
1091 * - encoding: allocated/set/freed by user.
1092 * - decoding: unused
1094 RcOverride *rc_override;
1095 int rc_override_count;
1098 * rate control equation.
1099 * - encoding: set by user
1100 * - decoding: unused
1106 * - encoding: set by user.
1107 * - decoding: unused
1113 * - encoding: set by user.
1114 * - decoding: unused
1119 * decoder bitstream buffer size.
1120 * - encoding: set by user.
1121 * - decoding: unused
1124 float rc_buffer_aggressivity;
1127 * qscale factor between p and i frames.
1128 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1129 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1130 * - encoding: set by user.
1131 * - decoding: unused
1133 float i_quant_factor;
1136 * qscale offset between p and i frames.
1137 * - encoding: set by user.
1138 * - decoding: unused
1140 float i_quant_offset;
1143 * initial complexity for pass1 ratecontrol.
1144 * - encoding: set by user.
1145 * - decoding: unused
1147 float rc_initial_cplx;
1150 * dct algorithm, see FF_DCT_* below.
1151 * - encoding: set by user
1152 * - decoding: unused
1155 #define FF_DCT_AUTO 0
1156 #define FF_DCT_FASTINT 1
1157 #define FF_DCT_INT 2
1158 #define FF_DCT_MMX 3
1159 #define FF_DCT_MLIB 4
1160 #define FF_DCT_ALTIVEC 5
1161 #define FF_DCT_FAAN 6
1164 * luminance masking (0-> disabled).
1165 * - encoding: set by user
1166 * - decoding: unused
1171 * temporary complexity masking (0-> disabled).
1172 * - encoding: set by user
1173 * - decoding: unused
1175 float temporal_cplx_masking;
1178 * spatial complexity masking (0-> disabled).
1179 * - encoding: set by user
1180 * - decoding: unused
1182 float spatial_cplx_masking;
1185 * p block masking (0-> disabled).
1186 * - encoding: set by user
1187 * - decoding: unused
1192 * darkness masking (0-> disabled).
1193 * - encoding: set by user
1194 * - decoding: unused
1199 /* for binary compatibility */
1203 * idct algorithm, see FF_IDCT_* below.
1204 * - encoding: set by user
1205 * - decoding: set by user
1208 #define FF_IDCT_AUTO 0
1209 #define FF_IDCT_INT 1
1210 #define FF_IDCT_SIMPLE 2
1211 #define FF_IDCT_SIMPLEMMX 3
1212 #define FF_IDCT_LIBMPEG2MMX 4
1213 #define FF_IDCT_PS2 5
1214 #define FF_IDCT_MLIB 6
1215 #define FF_IDCT_ARM 7
1216 #define FF_IDCT_ALTIVEC 8
1217 #define FF_IDCT_SH4 9
1218 #define FF_IDCT_SIMPLEARM 10
1219 #define FF_IDCT_H264 11
1220 #define FF_IDCT_VP3 12
1221 #define FF_IDCT_IPP 13
1222 #define FF_IDCT_XVIDMMX 14
1223 #define FF_IDCT_CAVS 15
1224 #define FF_IDCT_SIMPLEARMV5TE 16
1228 * - encoding: set by lavc
1229 * - decoding: set by user (or 0)
1233 * slice offsets in the frame in bytes.
1234 * - encoding: set/allocated by lavc
1235 * - decoding: set/allocated by user (or NULL)
1240 * error concealment flags.
1241 * - encoding: unused
1242 * - decoding: set by user
1244 int error_concealment;
1245 #define FF_EC_GUESS_MVS 1
1246 #define FF_EC_DEBLOCK 2
1249 * dsp_mask could be add used to disable unwanted CPU features
1250 * CPU features (i.e. MMX, SSE. ...)
1252 * with FORCE flag you may instead enable given CPU features
1253 * (Dangerous: usable in case of misdetection, improper usage however will
1254 * result into program crash)
1257 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1258 /* lower 16 bits - CPU features */
1260 #define FF_MM_MMX 0x0001 /* standard MMX */
1261 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1262 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1263 #define FF_MM_SSE 0x0008 /* SSE functions */
1264 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1265 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1266 #endif /* HAVE_MMX */
1268 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1269 #endif /* HAVE_IWMMXT */
1272 * bits per sample/pixel from the demuxer (needed for huffyuv).
1273 * - encoding: set by lavc
1274 * - decoding: set by user
1276 int bits_per_sample;
1279 * prediction method (needed for huffyuv).
1280 * - encoding: set by user
1281 * - decoding: unused
1283 int prediction_method;
1284 #define FF_PRED_LEFT 0
1285 #define FF_PRED_PLANE 1
1286 #define FF_PRED_MEDIAN 2
1289 * sample aspect ratio (0 if unknown).
1290 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1291 * - encoding: set by user.
1292 * - decoding: set by lavc.
1294 AVRational sample_aspect_ratio;
1297 * the picture in the bitstream.
1298 * - encoding: set by lavc
1299 * - decoding: set by lavc
1301 AVFrame *coded_frame;
1305 * - encoding: set by user.
1306 * - decoding: set by user.
1309 #define FF_DEBUG_PICT_INFO 1
1310 #define FF_DEBUG_RC 2
1311 #define FF_DEBUG_BITSTREAM 4
1312 #define FF_DEBUG_MB_TYPE 8
1313 #define FF_DEBUG_QP 16
1314 #define FF_DEBUG_MV 32
1315 #define FF_DEBUG_DCT_COEFF 0x00000040
1316 #define FF_DEBUG_SKIP 0x00000080
1317 #define FF_DEBUG_STARTCODE 0x00000100
1318 #define FF_DEBUG_PTS 0x00000200
1319 #define FF_DEBUG_ER 0x00000400
1320 #define FF_DEBUG_MMCO 0x00000800
1321 #define FF_DEBUG_BUGS 0x00001000
1322 #define FF_DEBUG_VIS_QP 0x00002000
1323 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1327 * - encoding: set by user.
1328 * - decoding: set by user.
1331 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1332 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1333 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1337 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1338 * - decoding: unused
1343 * minimum MB quantizer.
1344 * - encoding: unused
1345 * - decoding: unused
1350 * maximum MB quantizer.
1351 * - encoding: unused
1352 * - decoding: unused
1357 * motion estimation compare function.
1358 * - encoding: set by user.
1359 * - decoding: unused
1363 * subpixel motion estimation compare function.
1364 * - encoding: set by user.
1365 * - decoding: unused
1369 * macroblock compare function (not supported yet).
1370 * - encoding: set by user.
1371 * - decoding: unused
1375 * interlaced dct compare function
1376 * - encoding: set by user.
1377 * - decoding: unused
1380 #define FF_CMP_SAD 0
1381 #define FF_CMP_SSE 1
1382 #define FF_CMP_SATD 2
1383 #define FF_CMP_DCT 3
1384 #define FF_CMP_PSNR 4
1385 #define FF_CMP_BIT 5
1387 #define FF_CMP_ZERO 7
1388 #define FF_CMP_VSAD 8
1389 #define FF_CMP_VSSE 9
1390 #define FF_CMP_NSSE 10
1391 #define FF_CMP_W53 11
1392 #define FF_CMP_W97 12
1393 #define FF_CMP_DCTMAX 13
1394 #define FF_CMP_DCT264 14
1395 #define FF_CMP_CHROMA 256
1398 * ME diamond size & shape.
1399 * - encoding: set by user.
1400 * - decoding: unused
1405 * amount of previous MV predictors (2a+1 x 2a+1 square).
1406 * - encoding: set by user.
1407 * - decoding: unused
1409 int last_predictor_count;
1412 * pre pass for motion estimation.
1413 * - encoding: set by user.
1414 * - decoding: unused
1419 * motion estimation pre pass compare function.
1420 * - encoding: set by user.
1421 * - decoding: unused
1426 * ME pre pass diamond size & shape.
1427 * - encoding: set by user.
1428 * - decoding: unused
1433 * subpel ME quality.
1434 * - encoding: set by user.
1435 * - decoding: unused
1437 int me_subpel_quality;
1440 * callback to negotiate the pixelFormat.
1441 * @param fmt is the list of formats which are supported by the codec,
1442 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1443 * the first is allways the native one
1444 * @return the choosen format
1445 * - encoding: unused
1446 * - decoding: set by user, if not set then the native format will always be choosen
1448 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1451 * DTG active format information (additionnal aspect ratio
1452 * information only used in DVB MPEG2 transport streams). 0 if
1455 * - encoding: unused.
1456 * - decoding: set by decoder
1458 int dtg_active_format;
1459 #define FF_DTG_AFD_SAME 8
1460 #define FF_DTG_AFD_4_3 9
1461 #define FF_DTG_AFD_16_9 10
1462 #define FF_DTG_AFD_14_9 11
1463 #define FF_DTG_AFD_4_3_SP_14_9 13
1464 #define FF_DTG_AFD_16_9_SP_14_9 14
1465 #define FF_DTG_AFD_SP_4_3 15
1468 * Maximum motion estimation search range in subpel units.
1469 * if 0 then no limit
1471 * - encoding: set by user.
1472 * - decoding: unused.
1477 * intra quantizer bias.
1478 * - encoding: set by user.
1479 * - decoding: unused
1481 int intra_quant_bias;
1482 #define FF_DEFAULT_QUANT_BIAS 999999
1485 * inter quantizer bias.
1486 * - encoding: set by user.
1487 * - decoding: unused
1489 int inter_quant_bias;
1493 * - encoding: unused.
1494 * - decoding: which clrtable should be used for 8bit RGB images
1495 * table have to be stored somewhere FIXME
1500 * internal_buffer count.
1501 * Don't touch, used by lavc default_get_buffer()
1503 int internal_buffer_count;
1507 * Don't touch, used by lavc default_get_buffer()
1509 void *internal_buffer;
1511 #define FF_LAMBDA_SHIFT 7
1512 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1513 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1514 #define FF_LAMBDA_MAX (256*128-1)
1516 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1518 * global quality for codecs which cannot change it per frame.
1519 * this should be proportional to MPEG1/2/4 qscale.
1520 * - encoding: set by user.
1521 * - decoding: unused
1525 #define FF_CODER_TYPE_VLC 0
1526 #define FF_CODER_TYPE_AC 1
1529 * - encoding: set by user.
1530 * - decoding: unused
1536 * - encoding: set by user.
1537 * - decoding: unused
1543 * - encoding: unused
1544 * - decoding: set by user.
1546 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1551 * - encoding: unused
1552 * - decoding: set by user.
1555 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1556 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1557 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1560 * XVideo Motion Acceleration
1561 * - encoding: forbidden
1562 * - decoding: set by decoder
1564 int xvmc_acceleration;
1567 * macroblock decision mode
1568 * - encoding: set by user.
1569 * - decoding: unused
1572 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1573 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1574 #define FF_MB_DECISION_RD 2 ///< rate distoration
1577 * custom intra quantization matrix
1578 * - encoding: set by user, can be NULL
1579 * - decoding: set by lavc
1581 uint16_t *intra_matrix;
1584 * custom inter quantization matrix
1585 * - encoding: set by user, can be NULL
1586 * - decoding: set by lavc
1588 uint16_t *inter_matrix;
1591 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1592 * this is used to workaround some encoder bugs
1593 * - encoding: unused
1594 * - decoding: set by user, will be converted to upper case by lavc during init
1596 unsigned int stream_codec_tag;
1599 * scene change detection threshold.
1600 * 0 is default, larger means fewer detected scene changes
1601 * - encoding: set by user.
1602 * - decoding: unused
1604 int scenechange_threshold;
1607 * minimum lagrange multipler
1608 * - encoding: set by user.
1609 * - decoding: unused
1614 * maximum lagrange multipler
1615 * - encoding: set by user.
1616 * - decoding: unused
1621 * Palette control structure
1622 * - encoding: ??? (no palette-enabled encoder yet)
1623 * - decoding: set by user.
1625 struct AVPaletteControl *palctrl;
1628 * noise reduction strength
1629 * - encoding: set by user.
1630 * - decoding: unused
1632 int noise_reduction;
1635 * called at the beginning of a frame to get cr buffer for it.
1636 * buffer type (size, hints) must be the same. lavc won't check it.
1637 * lavc will pass previous buffer in pic, function should return
1638 * same buffer or new buffer with old frame "painted" into it.
1639 * if pic.data[0] == NULL must behave like get_buffer().
1640 * - encoding: unused
1641 * - decoding: set by lavc, user can override
1643 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1646 * number of bits which should be loaded into the rc buffer before decoding starts
1647 * - encoding: set by user.
1648 * - decoding: unused
1650 int rc_initial_buffer_occupancy;
1654 * - encoding: set by user.
1655 * - decoding: unused
1657 int inter_threshold;
1661 * - encoding: set by user.
1662 * - decoding: set by user.
1667 * simulates errors in the bitstream to test error concealment.
1668 * - encoding: set by user.
1669 * - decoding: unused.
1674 * MP3 antialias algorithm, see FF_AA_* below.
1675 * - encoding: unused
1676 * - decoding: set by user
1679 #define FF_AA_AUTO 0
1680 #define FF_AA_FASTINT 1 //not implemented yet
1682 #define FF_AA_FLOAT 3
1684 * Quantizer noise shaping.
1685 * - encoding: set by user
1686 * - decoding: unused
1688 int quantizer_noise_shaping;
1692 * is used to decide how many independant tasks should be passed to execute()
1693 * - encoding: set by user
1694 * - decoding: set by user
1699 * the codec may call this to execute several independant things. it will return only after
1700 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1701 * default implementation will execute the parts serially
1702 * @param count the number of things to execute
1703 * - encoding: set by lavc, user can override
1704 * - decoding: set by lavc, user can override
1706 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1710 * can be used by execute() to store some per AVCodecContext stuff.
1711 * - encoding: set by execute()
1712 * - decoding: set by execute()
1714 void *thread_opaque;
1717 * Motion estimation threshold. under which no motion estimation is
1718 * performed, but instead the user specified motion vectors are used
1720 * - encoding: set by user
1721 * - decoding: unused
1726 * Macroblock threshold. under which the user specified macroblock types will be used
1727 * - encoding: set by user
1728 * - decoding: unused
1733 * precision of the intra dc coefficient - 8.
1734 * - encoding: set by user
1735 * - decoding: unused
1737 int intra_dc_precision;
1740 * noise vs. sse weight for the nsse comparsion function.
1741 * - encoding: set by user
1742 * - decoding: unused
1747 * number of macroblock rows at the top which are skipped.
1748 * - encoding: unused
1749 * - decoding: set by user
1754 * number of macroblock rows at the bottom which are skipped.
1755 * - encoding: unused
1756 * - decoding: set by user
1762 * - encoding: set by user
1763 * - decoding: set by lavc
1766 #define FF_PROFILE_UNKNOWN -99
1770 * - encoding: set by user
1771 * - decoding: set by lavc
1774 #define FF_LEVEL_UNKNOWN -99
1777 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1778 * - encoding: unused
1779 * - decoding: set by user
1784 * bitsream width / height. may be different from width/height if lowres
1785 * or other things are used
1786 * - encoding: unused
1787 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1789 int coded_width, coded_height;
1792 * frame skip threshold
1793 * - encoding: set by user
1794 * - decoding: unused
1796 int frame_skip_threshold;
1800 * - encoding: set by user
1801 * - decoding: unused
1803 int frame_skip_factor;
1806 * frame skip exponent
1807 * - encoding: set by user
1808 * - decoding: unused
1813 * frame skip comparission function
1814 * - encoding: set by user.
1815 * - decoding: unused
1820 * border processing masking. raises the quantizer for mbs on the borders
1822 * - encoding: set by user
1823 * - decoding: unused
1825 float border_masking;
1828 * minimum MB lagrange multipler.
1829 * - encoding: set by user.
1830 * - decoding: unused
1835 * maximum MB lagrange multipler.
1836 * - encoding: set by user.
1837 * - decoding: unused
1843 * - encoding: set by user.
1844 * - decoding: unused
1846 int me_penalty_compensation;
1850 * - encoding: unused
1851 * - decoding: set by user.
1853 enum AVDiscard skip_loop_filter;
1857 * - encoding: unused
1858 * - decoding: set by user.
1860 enum AVDiscard skip_idct;
1864 * - encoding: unused
1865 * - decoding: set by user.
1867 enum AVDiscard skip_frame;
1871 * - encoding: set by user.
1872 * - decoding: unused
1878 * - encoding: set by user.
1879 * - decoding: unused
1884 * constant rate factor - quality-based VBR - values ~correspond to qps
1885 * - encoding: set by user.
1886 * - decoding: unused
1891 * constant quantization parameter rate control method
1892 * - encoding: set by user.
1893 * - decoding: unused
1899 * - encoding: set by user.
1900 * - decoding: unused
1905 * number of reference frames
1906 * - encoding: set by user.
1907 * - decoding: unused
1912 * chroma qp offset from luma
1913 * - encoding: set by user.
1914 * - decoding: unused
1919 * influences how often b-frames are used
1920 * - encoding: set by user.
1921 * - decoding: unused
1926 * trellis RD quantization
1927 * - encoding: set by user.
1928 * - decoding: unused
1933 * reduce fluctuations in qp (before curve compression)
1934 * - encoding: set by user.
1935 * - decoding: unused
1937 float complexityblur;
1940 * in-loop deblocking filter alphac0 parameter
1941 * alpha is in the range -6...6
1942 * - encoding: set by user.
1943 * - decoding: unused
1948 * in-loop deblocking filter beta parameter
1949 * beta is in the range -6...6
1950 * - encoding: set by user.
1951 * - decoding: unused
1956 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1957 * - encoding: set by user.
1958 * - decoding: unused
1961 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1962 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1963 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1964 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1965 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1968 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1969 * - encoding: set by user.
1970 * - decoding: unused
1975 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1976 * - encoding: set by user.
1977 * - decoding: unused
1982 * multiplied by qscale for each frame and added to scene_change_score
1983 * - encoding: set by user.
1984 * - decoding: unused
1986 int scenechange_factor;
1990 * note: value depends upon the compare functin used for fullpel ME
1991 * - encoding: set by user.
1992 * - decoding: unused
1997 * adjusts sensitivity of b_frame_strategy 1
1998 * - encoding: set by user.
1999 * - decoding: unused
2004 * - encoding: set by user.
2005 * - decoding: unused
2007 int compression_level;
2008 #define FF_COMPRESSION_DEFAULT -1
2011 * sets whether to use LPC mode - used by FLAC encoder
2012 * - encoding: set by user.
2013 * - decoding: unused.
2018 * LPC coefficient precision - used by FLAC encoder
2019 * - encoding: set by user.
2020 * - decoding: unused.
2022 int lpc_coeff_precision;
2025 * - encoding: set by user.
2026 * - decoding: unused.
2028 int min_prediction_order;
2031 * - encoding: set by user.
2032 * - decoding: unused.
2034 int max_prediction_order;
2037 * search method for selecting prediction order
2038 * - encoding: set by user.
2039 * - decoding: unused.
2041 int prediction_order_method;
2044 * - encoding: set by user.
2045 * - decoding: unused.
2047 int min_partition_order;
2050 * - encoding: set by user.
2051 * - decoding: unused.
2053 int max_partition_order;
2059 typedef struct AVCodec {
2061 enum CodecType type;
2064 int (*init)(AVCodecContext *);
2065 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2066 int (*close)(AVCodecContext *);
2067 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2068 uint8_t *buf, int buf_size);
2070 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2071 void *dummy; // FIXME remove next time we break binary compatibility
2073 struct AVCodec *next;
2074 void (*flush)(AVCodecContext *);
2075 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2076 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2080 * four components are given, that's all.
2081 * the last component is alpha
2083 typedef struct AVPicture {
2085 int linesize[4]; ///< number of bytes per line
2090 * This structure defines a method for communicating palette changes
2091 * between and demuxer and a decoder.
2092 * this is totally broken, palette changes should be sent as AVPackets
2094 #define AVPALETTE_SIZE 1024
2095 #define AVPALETTE_COUNT 256
2096 typedef struct AVPaletteControl {
2098 /* demuxer sets this to 1 to indicate the palette has changed;
2099 * decoder resets to 0 */
2100 int palette_changed;
2102 /* 4-byte ARGB palette entries, stored in native byte order; note that
2103 * the individual palette components should be on a 8-bit scale; if
2104 * the palette data comes from a IBM VGA native format, the component
2105 * data is probably 6 bits in size and needs to be scaled */
2106 unsigned int palette[AVPALETTE_COUNT];
2108 } AVPaletteControl attribute_deprecated;
2110 typedef struct AVSubtitleRect {
2117 uint32_t *rgba_palette;
2121 typedef struct AVSubtitle {
2122 uint16_t format; /* 0 = graphics */
2123 uint32_t start_display_time; /* relative to packet pts, in ms */
2124 uint32_t end_display_time; /* relative to packet pts, in ms */
2126 AVSubtitleRect *rects;
2129 extern AVCodec ac3_encoder;
2130 extern AVCodec mp2_encoder;
2131 extern AVCodec mp3lame_encoder;
2132 extern AVCodec oggvorbis_encoder;
2133 extern AVCodec faac_encoder;
2134 extern AVCodec flac_encoder;
2135 extern AVCodec xvid_encoder;
2136 extern AVCodec mpeg1video_encoder;
2137 extern AVCodec mpeg2video_encoder;
2138 extern AVCodec h261_encoder;
2139 extern AVCodec h263_encoder;
2140 extern AVCodec h263p_encoder;
2141 extern AVCodec flv_encoder;
2142 extern AVCodec rv10_encoder;
2143 extern AVCodec rv20_encoder;
2144 extern AVCodec dvvideo_encoder;
2145 extern AVCodec mjpeg_encoder;
2146 extern AVCodec ljpeg_encoder;
2147 extern AVCodec jpegls_encoder;
2148 extern AVCodec png_encoder;
2149 extern AVCodec ppm_encoder;
2150 extern AVCodec pgm_encoder;
2151 extern AVCodec pgmyuv_encoder;
2152 extern AVCodec pbm_encoder;
2153 extern AVCodec pam_encoder;
2154 extern AVCodec mpeg4_encoder;
2155 extern AVCodec msmpeg4v1_encoder;
2156 extern AVCodec msmpeg4v2_encoder;
2157 extern AVCodec msmpeg4v3_encoder;
2158 extern AVCodec wmv1_encoder;
2159 extern AVCodec wmv2_encoder;
2160 extern AVCodec huffyuv_encoder;
2161 extern AVCodec ffvhuff_encoder;
2162 extern AVCodec h264_encoder;
2163 extern AVCodec asv1_encoder;
2164 extern AVCodec asv2_encoder;
2165 extern AVCodec vcr1_encoder;
2166 extern AVCodec ffv1_encoder;
2167 extern AVCodec snow_encoder;
2168 extern AVCodec vorbis_encoder;
2169 extern AVCodec mdec_encoder;
2170 extern AVCodec zlib_encoder;
2171 extern AVCodec sonic_encoder;
2172 extern AVCodec sonic_ls_encoder;
2173 extern AVCodec svq1_encoder;
2174 extern AVCodec x264_encoder;
2176 extern AVCodec h263_decoder;
2177 extern AVCodec h261_decoder;
2178 extern AVCodec mpeg4_decoder;
2179 extern AVCodec msmpeg4v1_decoder;
2180 extern AVCodec msmpeg4v2_decoder;
2181 extern AVCodec msmpeg4v3_decoder;
2182 extern AVCodec wmv1_decoder;
2183 extern AVCodec wmv2_decoder;
2184 extern AVCodec vc1_decoder;
2185 extern AVCodec wmv3_decoder;
2186 extern AVCodec mpeg1video_decoder;
2187 extern AVCodec mpeg2video_decoder;
2188 extern AVCodec mpegvideo_decoder;
2189 extern AVCodec mpeg_xvmc_decoder;
2190 extern AVCodec h263i_decoder;
2191 extern AVCodec flv_decoder;
2192 extern AVCodec rv10_decoder;
2193 extern AVCodec rv20_decoder;
2194 extern AVCodec rv30_decoder;
2195 extern AVCodec rv40_decoder;
2196 extern AVCodec svq1_decoder;
2197 extern AVCodec svq3_decoder;
2198 extern AVCodec dvvideo_decoder;
2199 extern AVCodec wmav1_decoder;
2200 extern AVCodec wmav2_decoder;
2201 extern AVCodec mjpeg_decoder;
2202 extern AVCodec mjpegb_decoder;
2203 extern AVCodec sp5x_decoder;
2204 extern AVCodec png_decoder;
2205 extern AVCodec mp2_decoder;
2206 extern AVCodec mp3_decoder;
2207 extern AVCodec mp3adu_decoder;
2208 extern AVCodec mp3on4_decoder;
2209 extern AVCodec qdm2_decoder;
2210 extern AVCodec cook_decoder;
2211 extern AVCodec truespeech_decoder;
2212 extern AVCodec tta_decoder;
2213 extern AVCodec mace3_decoder;
2214 extern AVCodec mace6_decoder;
2215 extern AVCodec huffyuv_decoder;
2216 extern AVCodec ffvhuff_decoder;
2217 extern AVCodec oggvorbis_decoder;
2218 extern AVCodec cyuv_decoder;
2219 extern AVCodec h264_decoder;
2220 extern AVCodec indeo3_decoder;
2221 extern AVCodec vp3_decoder;
2222 extern AVCodec theora_decoder;
2223 extern AVCodec vp5_decoder;
2224 extern AVCodec vp6_decoder;
2225 extern AVCodec vp6f_decoder;
2226 extern AVCodec amr_nb_decoder;
2227 extern AVCodec amr_nb_encoder;
2228 extern AVCodec amr_wb_encoder;
2229 extern AVCodec amr_wb_decoder;
2230 extern AVCodec aac_decoder;
2231 extern AVCodec mpeg4aac_decoder;
2232 extern AVCodec asv1_decoder;
2233 extern AVCodec asv2_decoder;
2234 extern AVCodec vcr1_decoder;
2235 extern AVCodec cljr_decoder;
2236 extern AVCodec ffv1_decoder;
2237 extern AVCodec snow_decoder;
2238 extern AVCodec fourxm_decoder;
2239 extern AVCodec mdec_decoder;
2240 extern AVCodec roq_decoder;
2241 extern AVCodec interplay_video_decoder;
2242 extern AVCodec xan_wc3_decoder;
2243 extern AVCodec rpza_decoder;
2244 extern AVCodec cinepak_decoder;
2245 extern AVCodec msrle_decoder;
2246 extern AVCodec msvideo1_decoder;
2247 extern AVCodec vqa_decoder;
2248 extern AVCodec idcin_decoder;
2249 extern AVCodec eightbps_decoder;
2250 extern AVCodec smc_decoder;
2251 extern AVCodec flic_decoder;
2252 extern AVCodec vmdvideo_decoder;
2253 extern AVCodec vmdaudio_decoder;
2254 extern AVCodec truemotion1_decoder;
2255 extern AVCodec truemotion2_decoder;
2256 extern AVCodec mszh_decoder;
2257 extern AVCodec zlib_decoder;
2258 extern AVCodec ra_144_decoder;
2259 extern AVCodec ra_288_decoder;
2260 extern AVCodec roq_dpcm_decoder;
2261 extern AVCodec interplay_dpcm_decoder;
2262 extern AVCodec xan_dpcm_decoder;
2263 extern AVCodec sol_dpcm_decoder;
2264 extern AVCodec sonic_decoder;
2265 extern AVCodec qtrle_decoder;
2266 extern AVCodec flac_decoder;
2267 extern AVCodec tscc_decoder;
2268 extern AVCodec cscd_decoder;
2269 extern AVCodec nuv_decoder;
2270 extern AVCodec ulti_decoder;
2271 extern AVCodec qdraw_decoder;
2272 extern AVCodec xl_decoder;
2273 extern AVCodec qpeg_decoder;
2274 extern AVCodec shorten_decoder;
2275 extern AVCodec loco_decoder;
2276 extern AVCodec wnv1_decoder;
2277 extern AVCodec aasc_decoder;
2278 extern AVCodec alac_decoder;
2279 extern AVCodec ws_snd1_decoder;
2280 extern AVCodec indeo2_decoder;
2281 extern AVCodec vorbis_decoder;
2282 extern AVCodec fraps_decoder;
2283 extern AVCodec libgsm_encoder;
2284 extern AVCodec libgsm_decoder;
2285 extern AVCodec bmp_decoder;
2286 extern AVCodec mmvideo_decoder;
2287 extern AVCodec zmbv_decoder;
2288 extern AVCodec avs_decoder;
2289 extern AVCodec smacker_decoder;
2290 extern AVCodec smackaud_decoder;
2291 extern AVCodec kmvc_decoder;
2292 extern AVCodec flashsv_decoder;
2293 extern AVCodec cavs_decoder;
2294 extern AVCodec vmnc_decoder;
2295 extern AVCodec wavpack_decoder;
2296 extern AVCodec targa_decoder;
2299 #define PCM_CODEC(id, name) \
2300 extern AVCodec name ## _decoder; \
2301 extern AVCodec name ## _encoder
2303 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2304 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2305 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2306 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2307 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2308 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2309 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2310 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2311 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2312 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2313 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2314 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2315 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2316 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2317 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2318 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2319 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2323 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2324 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2325 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2326 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2327 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2328 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2329 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2330 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2331 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2332 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2333 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2334 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2335 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2336 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2337 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2338 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2339 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2340 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2344 /* dummy raw video codec */
2345 extern AVCodec rawvideo_encoder;
2346 extern AVCodec rawvideo_decoder;
2348 /* the following codecs use external GPL libs */
2349 extern AVCodec ac3_decoder;
2350 extern AVCodec dts_decoder;
2353 extern AVCodec dvdsub_encoder;
2354 extern AVCodec dvdsub_decoder;
2355 extern AVCodec dvbsub_encoder;
2356 extern AVCodec dvbsub_decoder;
2360 struct ReSampleContext;
2361 struct AVResampleContext;
2363 typedef struct ReSampleContext ReSampleContext;
2365 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2366 int output_rate, int input_rate);
2367 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2368 void audio_resample_close(ReSampleContext *s);
2370 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2371 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2372 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2373 void av_resample_close(struct AVResampleContext *c);
2375 /* YUV420 format is assumed ! */
2377 struct ImgReSampleContext;
2379 typedef struct ImgReSampleContext ImgReSampleContext;
2381 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2382 int input_width, int input_height);
2384 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2385 int iwidth, int iheight,
2386 int topBand, int bottomBand,
2387 int leftBand, int rightBand,
2388 int padtop, int padbottom,
2389 int padleft, int padright);
2392 void img_resample(ImgReSampleContext *s,
2393 AVPicture *output, const AVPicture *input);
2395 void img_resample_close(ImgReSampleContext *s);
2398 * Allocate memory for a picture. Call avpicture_free to free it.
2400 * @param picture the picture to be filled in.
2401 * @param pix_fmt the format of the picture.
2402 * @param width the width of the picture.
2403 * @param height the height of the picture.
2404 * @return 0 if successful, -1 if not.
2406 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2408 /* Free a picture previously allocated by avpicture_alloc. */
2409 void avpicture_free(AVPicture *picture);
2411 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2412 int pix_fmt, int width, int height);
2413 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2414 unsigned char *dest, int dest_size);
2415 int avpicture_get_size(int pix_fmt, int width, int height);
2416 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2417 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2418 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2419 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2420 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2422 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2423 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2424 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2425 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2426 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2427 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2429 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2431 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2432 int has_alpha, int *loss_ptr);
2434 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2435 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2436 int img_get_alpha_info(const AVPicture *src,
2437 int pix_fmt, int width, int height);
2439 /* convert among pixel formats */
2440 int img_convert(AVPicture *dst, int dst_pix_fmt,
2441 const AVPicture *src, int pix_fmt,
2442 int width, int height);
2444 /* deinterlace a picture */
2445 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2446 int pix_fmt, int width, int height);
2448 /* external high level API */
2450 extern AVCodec *first_avcodec;
2452 /* returns LIBAVCODEC_VERSION_INT constant */
2453 unsigned avcodec_version(void);
2454 /* returns LIBAVCODEC_BUILD constant */
2455 unsigned avcodec_build(void);
2456 void avcodec_init(void);
2458 void register_avcodec(AVCodec *format);
2459 AVCodec *avcodec_find_encoder(enum CodecID id);
2460 AVCodec *avcodec_find_encoder_by_name(const char *name);
2461 AVCodec *avcodec_find_decoder(enum CodecID id);
2462 AVCodec *avcodec_find_decoder_by_name(const char *name);
2463 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2465 void avcodec_get_context_defaults(AVCodecContext *s);
2466 AVCodecContext *avcodec_alloc_context(void);
2467 void avcodec_get_frame_defaults(AVFrame *pic);
2468 AVFrame *avcodec_alloc_frame(void);
2470 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2471 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2472 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2473 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2474 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2475 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2477 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2478 void avcodec_thread_free(AVCodecContext *s);
2479 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2480 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2481 //FIXME func typedef
2484 * opens / inits the AVCodecContext.
2487 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2490 * Decode an audio frame.
2492 * @param avctx the codec context.
2493 * @param samples output buffer, 16 byte aligned
2494 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2495 * @param buf input buffer, 16 byte aligned
2496 * @param buf_size the input buffer size
2497 * @return 0 if successful, -1 if not.
2500 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2501 int *frame_size_ptr,
2502 uint8_t *buf, int buf_size);
2503 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2504 int *got_picture_ptr,
2505 uint8_t *buf, int buf_size);
2506 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2508 const uint8_t *buf, int buf_size);
2509 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2511 uint8_t *buf, int buf_size);
2512 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2513 const short *samples);
2514 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2515 const AVFrame *pict);
2516 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2517 const AVSubtitle *sub);
2519 int avcodec_close(AVCodecContext *avctx);
2521 void avcodec_register_all(void);
2523 void avcodec_flush_buffers(AVCodecContext *avctx);
2525 void avcodec_default_free_buffers(AVCodecContext *s);
2527 /* misc usefull functions */
2530 * returns a single letter to describe the picture type
2532 char av_get_pict_type_char(int pict_type);
2535 * returns codec bits per sample
2537 int av_get_bits_per_sample(enum CodecID codec_id);
2540 typedef struct AVCodecParserContext {
2542 struct AVCodecParser *parser;
2543 int64_t frame_offset; /* offset of the current frame */
2544 int64_t cur_offset; /* current offset
2545 (incremented by each av_parser_parse()) */
2546 int64_t last_frame_offset; /* offset of the last frame */
2548 int pict_type; /* XXX: put it back in AVCodecContext */
2549 int repeat_pict; /* XXX: put it back in AVCodecContext */
2550 int64_t pts; /* pts of the current frame */
2551 int64_t dts; /* dts of the current frame */
2556 int fetch_timestamp;
2558 #define AV_PARSER_PTS_NB 4
2559 int cur_frame_start_index;
2560 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2561 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2562 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2565 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2566 } AVCodecParserContext;
2568 typedef struct AVCodecParser {
2569 int codec_ids[5]; /* several codec IDs are permitted */
2571 int (*parser_init)(AVCodecParserContext *s);
2572 int (*parser_parse)(AVCodecParserContext *s,
2573 AVCodecContext *avctx,
2574 uint8_t **poutbuf, int *poutbuf_size,
2575 const uint8_t *buf, int buf_size);
2576 void (*parser_close)(AVCodecParserContext *s);
2577 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2578 struct AVCodecParser *next;
2581 extern AVCodecParser *av_first_parser;
2583 void av_register_codec_parser(AVCodecParser *parser);
2584 AVCodecParserContext *av_parser_init(int codec_id);
2585 int av_parser_parse(AVCodecParserContext *s,
2586 AVCodecContext *avctx,
2587 uint8_t **poutbuf, int *poutbuf_size,
2588 const uint8_t *buf, int buf_size,
2589 int64_t pts, int64_t dts);
2590 int av_parser_change(AVCodecParserContext *s,
2591 AVCodecContext *avctx,
2592 uint8_t **poutbuf, int *poutbuf_size,
2593 const uint8_t *buf, int buf_size, int keyframe);
2594 void av_parser_close(AVCodecParserContext *s);
2596 extern AVCodecParser mpegvideo_parser;
2597 extern AVCodecParser mpeg4video_parser;
2598 extern AVCodecParser cavsvideo_parser;
2599 extern AVCodecParser h261_parser;
2600 extern AVCodecParser h263_parser;
2601 extern AVCodecParser h264_parser;
2602 extern AVCodecParser mjpeg_parser;
2603 extern AVCodecParser pnm_parser;
2604 extern AVCodecParser mpegaudio_parser;
2605 extern AVCodecParser ac3_parser;
2606 extern AVCodecParser dvdsub_parser;
2607 extern AVCodecParser dvbsub_parser;
2608 extern AVCodecParser aac_parser;
2611 typedef struct AVBitStreamFilterContext {
2613 struct AVBitStreamFilter *filter;
2614 AVCodecParserContext *parser;
2615 struct AVBitStreamFilterContext *next;
2616 } AVBitStreamFilterContext;
2619 typedef struct AVBitStreamFilter {
2622 int (*filter)(AVBitStreamFilterContext *bsfc,
2623 AVCodecContext *avctx, const char *args,
2624 uint8_t **poutbuf, int *poutbuf_size,
2625 const uint8_t *buf, int buf_size, int keyframe);
2626 struct AVBitStreamFilter *next;
2627 } AVBitStreamFilter;
2629 extern AVBitStreamFilter *av_first_bitstream_filter;
2631 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2632 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2633 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2634 AVCodecContext *avctx, const char *args,
2635 uint8_t **poutbuf, int *poutbuf_size,
2636 const uint8_t *buf, int buf_size, int keyframe);
2637 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2639 extern AVBitStreamFilter dump_extradata_bsf;
2640 extern AVBitStreamFilter remove_extradata_bsf;
2641 extern AVBitStreamFilter noise_bsf;
2645 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2646 /* for static data only */
2647 /* call av_free_static to release all staticaly allocated tables */
2648 void av_free_static(void);
2649 void *av_mallocz_static(unsigned int size);
2650 void *av_realloc_static(void *ptr, unsigned int size);
2652 void img_copy(AVPicture *dst, const AVPicture *src,
2653 int pix_fmt, int width, int height);
2655 int img_crop(AVPicture *dst, const AVPicture *src,
2656 int pix_fmt, int top_band, int left_band);
2658 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2659 int padtop, int padbottom, int padleft, int padright, int *color);
2662 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2663 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2664 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2665 (((uint8_t*)(x))[1] << 16) | \
2666 (((uint8_t*)(x))[2] << 8) | \
2668 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2669 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2670 (((uint8_t*)(x))[2] << 16) | \
2671 (((uint8_t*)(x))[1] << 8) | \
2675 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2681 #endif /* AVCODEC_H */