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)+(20<<8)+0)
41 #define LIBAVCODEC_VERSION 51.20.0
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 CODEC_ID_DSICINVIDEO,
149 CODEC_ID_TIERTEXSEQVIDEO,
152 /* various pcm "codecs" */
153 CODEC_ID_PCM_S16LE= 0x10000,
169 CODEC_ID_PCM_S24DAUD,
171 /* various adpcm codecs */
172 CODEC_ID_ADPCM_IMA_QT= 0x11000,
173 CODEC_ID_ADPCM_IMA_WAV,
174 CODEC_ID_ADPCM_IMA_DK3,
175 CODEC_ID_ADPCM_IMA_DK4,
176 CODEC_ID_ADPCM_IMA_WS,
177 CODEC_ID_ADPCM_IMA_SMJPEG,
186 CODEC_ID_ADPCM_YAMAHA,
187 CODEC_ID_ADPCM_SBPRO_4,
188 CODEC_ID_ADPCM_SBPRO_3,
189 CODEC_ID_ADPCM_SBPRO_2,
192 CODEC_ID_AMR_NB= 0x12000,
195 /* RealAudio codecs*/
196 CODEC_ID_RA_144= 0x13000,
199 /* various DPCM codecs */
200 CODEC_ID_ROQ_DPCM= 0x14000,
201 CODEC_ID_INTERPLAY_DPCM,
205 CODEC_ID_MP2= 0x15000,
206 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
225 CODEC_ID_WESTWOOD_SND1,
234 CODEC_ID_DSICINAUDIO,
236 /* subtitle codecs */
237 CODEC_ID_DVD_SUBTITLE= 0x17000,
238 CODEC_ID_DVB_SUBTITLE,
240 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
241 stream (only used by libavformat) */
244 /* CODEC_ID_MP3LAME is absolete */
245 #define CODEC_ID_MP3LAME CODEC_ID_MP3
248 CODEC_TYPE_UNKNOWN = -1,
255 /* currently unused, may be used if 24/32 bits samples ever supported */
256 /* all in native endian */
258 SAMPLE_FMT_NONE = -1,
259 SAMPLE_FMT_U8, ///< unsigned 8 bits
260 SAMPLE_FMT_S16, ///< signed 16 bits
261 SAMPLE_FMT_S24, ///< signed 24 bits
262 SAMPLE_FMT_S32, ///< signed 32 bits
263 SAMPLE_FMT_FLT, ///< float
267 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
270 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
271 * this is mainly needed because some optimized bitstream readers read
272 * 32 or 64 bit at once and could read over the end<br>
273 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
274 * MPEG bitstreams could cause overread and segfault
276 #define FF_INPUT_BUFFER_PADDING_SIZE 8
279 * minimum encoding buffer size.
280 * used to avoid some checks during header writing
282 #define FF_MIN_BUFFER_SIZE 16384
284 /* motion estimation type, EPZS by default */
298 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
299 AVDISCARD_NONE =-16, ///< discard nothing
300 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
301 AVDISCARD_NONREF = 8, ///< discard all non reference
302 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
303 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
304 AVDISCARD_ALL = 48, ///< discard all
307 typedef struct RcOverride{
310 int qscale; // if this is 0 then quality_factor will be used instead
311 float quality_factor;
314 #define FF_MAX_B_FRAMES 16
317 these flags can be passed in AVCodecContext.flags before initing
318 Note: not everything is supported yet.
321 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
322 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
323 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
324 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
325 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
326 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
327 /* parent program gurantees that the input for b-frame containing streams is not written to
328 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
329 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
330 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
331 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
332 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
333 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
334 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
335 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
336 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
337 of only at frame boundaries */
338 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
339 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
340 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
341 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
342 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
343 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
344 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
345 /* Fx : Flag for h263+ extra options */
346 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
347 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
348 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
349 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
350 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
351 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
352 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
353 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
354 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
355 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
356 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
357 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
358 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
359 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
360 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
361 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
362 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
363 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
364 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
365 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
366 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
367 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
368 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
369 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
370 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
372 /* Unsupported options :
373 * Syntax Arithmetic coding (SAC)
374 * Reference Picture Selection
375 * Independant Segment Decoding */
377 /* codec capabilities */
379 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
381 * Codec uses get_buffer() for allocating buffers.
382 * direct rendering method 1
384 #define CODEC_CAP_DR1 0x0002
385 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
387 #define CODEC_CAP_PARSE_ONLY 0x0004
388 #define CODEC_CAP_TRUNCATED 0x0008
389 /* codec can export data for HW decoding (XvMC) */
390 #define CODEC_CAP_HWACCEL 0x0010
392 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
393 * if this is not set, the codec is guranteed to never be feeded with NULL data
395 #define CODEC_CAP_DELAY 0x0020
397 * Codec can be fed a final frame with a smaller size.
398 * This can be used to prevent truncation of the last audio samples.
400 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
402 //the following defines may change, don't expect compatibility if you use them
403 #define MB_TYPE_INTRA4x4 0x0001
404 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
405 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
406 #define MB_TYPE_16x16 0x0008
407 #define MB_TYPE_16x8 0x0010
408 #define MB_TYPE_8x16 0x0020
409 #define MB_TYPE_8x8 0x0040
410 #define MB_TYPE_INTERLACED 0x0080
411 #define MB_TYPE_DIRECT2 0x0100 //FIXME
412 #define MB_TYPE_ACPRED 0x0200
413 #define MB_TYPE_GMC 0x0400
414 #define MB_TYPE_SKIP 0x0800
415 #define MB_TYPE_P0L0 0x1000
416 #define MB_TYPE_P1L0 0x2000
417 #define MB_TYPE_P0L1 0x4000
418 #define MB_TYPE_P1L1 0x8000
419 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
420 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
421 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
422 #define MB_TYPE_QUANT 0x00010000
423 #define MB_TYPE_CBP 0x00020000
424 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
428 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
430 typedef struct AVPanScan{
433 * - encoding: set by user.
434 * - decoding: set by lavc
439 * width and height in 1/16 pel
440 * - encoding: set by user.
441 * - decoding: set by lavc
447 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
448 * - encoding: set by user.
449 * - decoding: set by lavc
451 int16_t position[3][2];
454 #define FF_COMMON_FRAME \
456 * pointer to the picture planes.\
457 * this might be different from the first allocated byte\
464 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
465 * this isn't used by lavc unless the default get/release_buffer() is used\
471 * 1 -> keyframe, 0-> not\
472 * - encoding: set by lavc\
473 * - decoding: set by lavc\
478 * picture type of the frame, see ?_TYPE below.\
479 * - encoding: set by lavc for coded_picture (and set by user for input)\
480 * - decoding: set by lavc\
485 * presentation timestamp in time_base units (time when frame should be shown to user)\
486 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
487 * - encoding: MUST be set by user\
488 * - decoding: set by lavc\
493 * picture number in bitstream order.\
494 * - encoding: set by\
495 * - decoding: set by lavc\
497 int coded_picture_number;\
499 * picture number in display order.\
500 * - encoding: set by\
501 * - decoding: set by lavc\
503 int display_picture_number;\
506 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
507 * - encoding: set by lavc for coded_picture (and set by user for input)\
508 * - decoding: set by lavc\
513 * buffer age (1->was last buffer and dint change, 2->..., ...).\
514 * set to INT_MAX if the buffer has not been used yet \
515 * - encoding: unused\
516 * - decoding: MUST be set by get_buffer()\
521 * is this picture used as reference\
522 * - encoding: unused\
523 * - decoding: set by lavc (before get_buffer() call))\
529 * - encoding: unused\
530 * - decoding: set by lavc\
532 int8_t *qscale_table;\
535 * - encoding: unused\
536 * - decoding: set by lavc\
541 * mbskip_table[mb]>=1 if MB didnt change\
542 * stride= mb_width = (width+15)>>4\
543 * - encoding: unused\
544 * - decoding: set by lavc\
546 uint8_t *mbskip_table;\
549 * Motion vector table.\
552 * int mv_sample_log2= 4 - motion_subsample_log2;\
553 * int mb_width= (width+15)>>4;\
554 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
555 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
557 * - encoding: set by user\
558 * - decoding: set by lavc\
560 int16_t (*motion_val[2])[2];\
563 * Macroblock type table\
564 * mb_type_base + mb_width + 2\
565 * - encoding: set by user\
566 * - decoding: set by lavc\
571 * log2 of the size of the block which a single vector in motion_val represents: \
572 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
573 * - encoding: unused\
574 * - decoding: set by lavc\
576 uint8_t motion_subsample_log2;\
579 * for some private data of the user\
580 * - encoding: unused\
581 * - decoding: set by user\
587 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
588 * - decoding: unused\
593 * type of the buffer (to keep track of who has to dealloc data[*])\
594 * - encoding: set by the one who allocs it\
595 * - decoding: set by the one who allocs it\
596 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
601 * when decoding, this signal how much the picture must be delayed.\
602 * extra_delay = repeat_pict / (2*fps)\
603 * - encoding: unused\
604 * - decoding: set by lavc\
614 * The content of the picture is interlaced.\
615 * - encoding: set by user\
616 * - decoding: set by lavc (default 0)\
618 int interlaced_frame;\
621 * if the content is interlaced, is top field displayed first.\
622 * - encoding: set by user\
623 * - decoding: set by lavc\
625 int top_field_first;\
629 * - encoding: set by user\
630 * - decoding: set by lavc\
632 AVPanScan *pan_scan;\
635 * tell user application that palette has changed from previous frame.\
636 * - encoding: ??? (no palette-enabled encoder yet)\
637 * - decoding: set by lavc (default 0)\
639 int palette_has_changed;\
642 * Codec suggestion on buffer type if != 0\
643 * - encoding: unused\
644 * - decoding: set by lavc (before get_buffer() call))\
650 * - encoding: unused\
651 * - decoding: set by lavc\
656 * Motion referece frame index\
657 * - encoding: set by user\
658 * - decoding: set by lavc\
660 int8_t *ref_index[2];
662 #define FF_QSCALE_TYPE_MPEG1 0
663 #define FF_QSCALE_TYPE_MPEG2 1
664 #define FF_QSCALE_TYPE_H264 2
666 #define FF_BUFFER_TYPE_INTERNAL 1
667 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
668 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
669 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
672 #define FF_I_TYPE 1 // Intra
673 #define FF_P_TYPE 2 // Predicted
674 #define FF_B_TYPE 3 // Bi-dir predicted
675 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
679 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
680 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
681 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
682 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
687 typedef struct AVFrame {
691 #define DEFAULT_FRAME_RATE_BASE 1001000
694 * main external api structure.
696 typedef struct AVCodecContext {
698 * Info on struct for av_log
699 * - set by avcodec_alloc_context
703 * the average bitrate.
704 * - encoding: set by user. unused for constant quantizer encoding
705 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
710 * number of bits the bitstream is allowed to diverge from the reference.
711 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
712 * - encoding: set by user. unused for constant quantizer encoding
715 int bit_rate_tolerance;
719 * - encoding: set by user.
720 * - decoding: set by user.
725 * some codecs needs additionnal format info. It is stored here
726 * - encoding: set by user.
727 * - decoding: set by lavc. (FIXME is this ok?)
732 * motion estimation algorithm used for video coding.
733 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
734 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
735 * - encoding: MUST be set by user.
741 * some codecs need / can use extra-data like huffman tables.
742 * mjpeg: huffman tables
743 * rv10: additional flags
744 * mpeg4: global headers (they can be in the bitstream or here)
745 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
746 * then extradata_size to avoid prolems if its read with the bitstream reader
747 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
748 * - encoding: set/allocated/freed by lavc.
749 * - decoding: set/allocated/freed by user.
755 * this is the fundamental unit of time (in seconds) in terms
756 * of which frame timestamps are represented. for fixed-fps content,
757 * timebase should be 1/framerate and timestamp increments should be
759 * - encoding: MUST be set by user
760 * - decoding: set by lavc.
762 AVRational time_base;
766 * picture width / height.
767 * - encoding: MUST be set by user.
768 * - decoding: set by lavc.
769 * Note, for compatibility its possible to set this instead of
770 * coded_width/height before decoding
774 #define FF_ASPECT_EXTENDED 15
777 * the number of pictures in a group of pitures, or 0 for intra_only.
778 * - encoding: set by user.
784 * pixel format, see PIX_FMT_xxx.
785 * - encoding: set by user.
786 * - decoding: set by lavc.
788 enum PixelFormat pix_fmt;
791 * Frame rate emulation. If not zero lower layer (i.e. format handler)
792 * has to read frames at native frame rate.
793 * - encoding: set by user.
794 * - decoding: unused.
799 * if non NULL, 'draw_horiz_band' is called by the libavcodec
800 * decoder to draw an horizontal band. It improve cache usage. Not
801 * all codecs can do that. You must check the codec capabilities
804 * - decoding: set by user.
805 * @param height the height of the slice
806 * @param y the y position of the slice
807 * @param type 1->top field, 2->bottom field, 3->frame
808 * @param offset offset into the AVFrame.data from which the slice should be read
810 void (*draw_horiz_band)(struct AVCodecContext *s,
811 const AVFrame *src, int offset[4],
812 int y, int type, int height);
815 int sample_rate; ///< samples per sec
819 * audio sample format.
820 * - encoding: set by user.
821 * - decoding: set by lavc.
823 enum SampleFormat sample_fmt; ///< sample format, currenly unused
825 /* the following data should not be initialized */
827 * samples per packet. initialized when calling 'init'
830 int frame_number; ///< audio or video frame number
831 int real_pict_num; ///< returns the real picture number of previous encoded frame
834 * number of frames the decoded output will be delayed relative to
836 * - encoding: set by lavc.
841 /* - encoding parameters */
842 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
843 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
847 * - encoding: set by user.
854 * - encoding: set by user.
860 * maximum quantizer difference etween frames.
861 * - encoding: set by user.
867 * maximum number of b frames between non b frames.
868 * note: the output will be delayed by max_b_frames+1 relative to the input
869 * - encoding: set by user.
875 * qscale factor between ip and b frames.
876 * - encoding: set by user.
879 float b_quant_factor;
881 /** obsolete FIXME remove */
883 #define FF_RC_STRATEGY_XVID 1
885 int b_frame_strategy;
889 * deprecated in favor of skip_idct and skip_frame
891 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
895 struct AVCodec *codec;
899 /* unused, FIXME remove*/
902 int rtp_payload_size; /* The size of the RTP payload: the coder will */
903 /* do it's best to deliver a chunk with size */
904 /* below rtp_payload_size, the chunk will start */
905 /* with a start code on some codecs like H.263 */
906 /* This doesn't take account of any particular */
907 /* headers inside the transmited RTP payload */
910 /* The RTP callback: This function is called */
911 /* every time the encoder has a packet to send */
912 /* Depends on the encoder if the data starts */
913 /* with a Start Code (it should) H.263 does. */
914 /* mb_nb contains the number of macroblocks */
915 /* encoded in the RTP payload */
916 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
918 /* statistics, used for 2-pass encoding */
929 * number of bits used for the previously encoded frame.
930 * - encoding: set by lavc
936 * private data of the user, can be used to carry app specific stuff.
937 * - encoding: set by user
938 * - decoding: set by user
943 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
944 enum CodecID codec_id; /* see CODEC_ID_xxx */
947 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
948 * this is used to workaround some encoder bugs
949 * - encoding: set by user, if not then the default based on codec_id will be used
950 * - decoding: set by user, will be converted to upper case by lavc during init
952 unsigned int codec_tag;
955 * workaround bugs in encoders which sometimes cannot be detected automatically.
956 * - encoding: set by user
957 * - decoding: set by user
960 #define FF_BUG_AUTODETECT 1 ///< autodetection
961 #define FF_BUG_OLD_MSMPEG4 2
962 #define FF_BUG_XVID_ILACE 4
963 #define FF_BUG_UMP4 8
964 #define FF_BUG_NO_PADDING 16
965 #define FF_BUG_AMV 32
966 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
967 #define FF_BUG_QPEL_CHROMA 64
968 #define FF_BUG_STD_QPEL 128
969 #define FF_BUG_QPEL_CHROMA2 256
970 #define FF_BUG_DIRECT_BLOCKSIZE 512
971 #define FF_BUG_EDGE 1024
972 #define FF_BUG_HPEL_CHROMA 2048
973 #define FF_BUG_DC_CLIP 4096
974 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
975 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
978 * luma single coeff elimination threshold.
979 * - encoding: set by user
982 int luma_elim_threshold;
985 * chroma single coeff elimination threshold.
986 * - encoding: set by user
989 int chroma_elim_threshold;
992 * strictly follow the std (MPEG4, ...).
993 * - encoding: set by user
996 int strict_std_compliance;
997 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
998 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
999 #define FF_COMPLIANCE_NORMAL 0
1000 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
1001 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1004 * qscale offset between ip and b frames.
1005 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1006 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1007 * - encoding: set by user.
1008 * - decoding: unused
1010 float b_quant_offset;
1013 * error resilience higher values will detect more errors but may missdetect
1014 * some more or less valid parts as errors.
1015 * - encoding: unused
1016 * - decoding: set by user
1018 int error_resilience;
1019 #define FF_ER_CAREFUL 1
1020 #define FF_ER_COMPLIANT 2
1021 #define FF_ER_AGGRESSIVE 3
1022 #define FF_ER_VERY_AGGRESSIVE 4
1025 * called at the beginning of each frame to get a buffer for it.
1026 * if pic.reference is set then the frame will be read later by lavc
1027 * avcodec_align_dimensions() should be used to find the required width and
1028 * height, as they normally need to be rounded up to the next multiple of 16
1029 * - encoding: unused
1030 * - decoding: set by lavc, user can override
1032 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1035 * called to release buffers which where allocated with get_buffer.
1036 * a released buffer can be reused in get_buffer()
1037 * pic.data[*] must be set to NULL
1038 * - encoding: unused
1039 * - decoding: set by lavc, user can override
1041 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1044 * if 1 the stream has a 1 frame delay during decoding.
1045 * - encoding: set by lavc
1046 * - decoding: set by lavc
1051 * number of bytes per packet if constant and known or 0
1052 * used by some WAV based audio codecs
1056 int parse_only; /* - decoding only: if true, only parsing is done
1057 (function avcodec_parse_frame()). The frame
1058 data is returned. Only MPEG codecs support this now. */
1061 * 0-> h263 quant 1-> mpeg quant.
1062 * - encoding: set by user.
1063 * - decoding: unused
1068 * pass1 encoding statistics output buffer.
1069 * - encoding: set by lavc
1070 * - decoding: unused
1075 * pass2 encoding statistics input buffer.
1076 * concatenated stuff from stats_out of pass1 should be placed here
1077 * - encoding: allocated/set/freed by user
1078 * - decoding: unused
1083 * ratecontrol qmin qmax limiting method.
1084 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1085 * - encoding: set by user.
1086 * - decoding: unused
1094 * ratecontrol override, see RcOverride.
1095 * - encoding: allocated/set/freed by user.
1096 * - decoding: unused
1098 RcOverride *rc_override;
1099 int rc_override_count;
1102 * rate control equation.
1103 * - encoding: set by user
1104 * - decoding: unused
1110 * - encoding: set by user.
1111 * - decoding: unused
1117 * - encoding: set by user.
1118 * - decoding: unused
1123 * decoder bitstream buffer size.
1124 * - encoding: set by user.
1125 * - decoding: unused
1128 float rc_buffer_aggressivity;
1131 * qscale factor between p and i frames.
1132 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1133 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1134 * - encoding: set by user.
1135 * - decoding: unused
1137 float i_quant_factor;
1140 * qscale offset between p and i frames.
1141 * - encoding: set by user.
1142 * - decoding: unused
1144 float i_quant_offset;
1147 * initial complexity for pass1 ratecontrol.
1148 * - encoding: set by user.
1149 * - decoding: unused
1151 float rc_initial_cplx;
1154 * dct algorithm, see FF_DCT_* below.
1155 * - encoding: set by user
1156 * - decoding: unused
1159 #define FF_DCT_AUTO 0
1160 #define FF_DCT_FASTINT 1
1161 #define FF_DCT_INT 2
1162 #define FF_DCT_MMX 3
1163 #define FF_DCT_MLIB 4
1164 #define FF_DCT_ALTIVEC 5
1165 #define FF_DCT_FAAN 6
1168 * luminance masking (0-> disabled).
1169 * - encoding: set by user
1170 * - decoding: unused
1175 * temporary complexity masking (0-> disabled).
1176 * - encoding: set by user
1177 * - decoding: unused
1179 float temporal_cplx_masking;
1182 * spatial complexity masking (0-> disabled).
1183 * - encoding: set by user
1184 * - decoding: unused
1186 float spatial_cplx_masking;
1189 * p block masking (0-> disabled).
1190 * - encoding: set by user
1191 * - decoding: unused
1196 * darkness masking (0-> disabled).
1197 * - encoding: set by user
1198 * - decoding: unused
1203 /* for binary compatibility */
1207 * idct algorithm, see FF_IDCT_* below.
1208 * - encoding: set by user
1209 * - decoding: set by user
1212 #define FF_IDCT_AUTO 0
1213 #define FF_IDCT_INT 1
1214 #define FF_IDCT_SIMPLE 2
1215 #define FF_IDCT_SIMPLEMMX 3
1216 #define FF_IDCT_LIBMPEG2MMX 4
1217 #define FF_IDCT_PS2 5
1218 #define FF_IDCT_MLIB 6
1219 #define FF_IDCT_ARM 7
1220 #define FF_IDCT_ALTIVEC 8
1221 #define FF_IDCT_SH4 9
1222 #define FF_IDCT_SIMPLEARM 10
1223 #define FF_IDCT_H264 11
1224 #define FF_IDCT_VP3 12
1225 #define FF_IDCT_IPP 13
1226 #define FF_IDCT_XVIDMMX 14
1227 #define FF_IDCT_CAVS 15
1228 #define FF_IDCT_SIMPLEARMV5TE 16
1232 * - encoding: set by lavc
1233 * - decoding: set by user (or 0)
1237 * slice offsets in the frame in bytes.
1238 * - encoding: set/allocated by lavc
1239 * - decoding: set/allocated by user (or NULL)
1244 * error concealment flags.
1245 * - encoding: unused
1246 * - decoding: set by user
1248 int error_concealment;
1249 #define FF_EC_GUESS_MVS 1
1250 #define FF_EC_DEBLOCK 2
1253 * dsp_mask could be add used to disable unwanted CPU features
1254 * CPU features (i.e. MMX, SSE. ...)
1256 * with FORCE flag you may instead enable given CPU features
1257 * (Dangerous: usable in case of misdetection, improper usage however will
1258 * result into program crash)
1261 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1262 /* lower 16 bits - CPU features */
1264 #define FF_MM_MMX 0x0001 /* standard MMX */
1265 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1266 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1267 #define FF_MM_SSE 0x0008 /* SSE functions */
1268 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1269 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1270 #endif /* HAVE_MMX */
1272 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1273 #endif /* HAVE_IWMMXT */
1276 * bits per sample/pixel from the demuxer (needed for huffyuv).
1277 * - encoding: set by lavc
1278 * - decoding: set by user
1280 int bits_per_sample;
1283 * prediction method (needed for huffyuv).
1284 * - encoding: set by user
1285 * - decoding: unused
1287 int prediction_method;
1288 #define FF_PRED_LEFT 0
1289 #define FF_PRED_PLANE 1
1290 #define FF_PRED_MEDIAN 2
1293 * sample aspect ratio (0 if unknown).
1294 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1295 * - encoding: set by user.
1296 * - decoding: set by lavc.
1298 AVRational sample_aspect_ratio;
1301 * the picture in the bitstream.
1302 * - encoding: set by lavc
1303 * - decoding: set by lavc
1305 AVFrame *coded_frame;
1309 * - encoding: set by user.
1310 * - decoding: set by user.
1313 #define FF_DEBUG_PICT_INFO 1
1314 #define FF_DEBUG_RC 2
1315 #define FF_DEBUG_BITSTREAM 4
1316 #define FF_DEBUG_MB_TYPE 8
1317 #define FF_DEBUG_QP 16
1318 #define FF_DEBUG_MV 32
1319 #define FF_DEBUG_DCT_COEFF 0x00000040
1320 #define FF_DEBUG_SKIP 0x00000080
1321 #define FF_DEBUG_STARTCODE 0x00000100
1322 #define FF_DEBUG_PTS 0x00000200
1323 #define FF_DEBUG_ER 0x00000400
1324 #define FF_DEBUG_MMCO 0x00000800
1325 #define FF_DEBUG_BUGS 0x00001000
1326 #define FF_DEBUG_VIS_QP 0x00002000
1327 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1331 * - encoding: set by user.
1332 * - decoding: set by user.
1335 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1336 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1337 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1341 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1342 * - decoding: unused
1347 * minimum MB quantizer.
1348 * - encoding: unused
1349 * - decoding: unused
1354 * maximum MB quantizer.
1355 * - encoding: unused
1356 * - decoding: unused
1361 * motion estimation compare function.
1362 * - encoding: set by user.
1363 * - decoding: unused
1367 * subpixel motion estimation compare function.
1368 * - encoding: set by user.
1369 * - decoding: unused
1373 * macroblock compare function (not supported yet).
1374 * - encoding: set by user.
1375 * - decoding: unused
1379 * interlaced dct compare function
1380 * - encoding: set by user.
1381 * - decoding: unused
1384 #define FF_CMP_SAD 0
1385 #define FF_CMP_SSE 1
1386 #define FF_CMP_SATD 2
1387 #define FF_CMP_DCT 3
1388 #define FF_CMP_PSNR 4
1389 #define FF_CMP_BIT 5
1391 #define FF_CMP_ZERO 7
1392 #define FF_CMP_VSAD 8
1393 #define FF_CMP_VSSE 9
1394 #define FF_CMP_NSSE 10
1395 #define FF_CMP_W53 11
1396 #define FF_CMP_W97 12
1397 #define FF_CMP_DCTMAX 13
1398 #define FF_CMP_DCT264 14
1399 #define FF_CMP_CHROMA 256
1402 * ME diamond size & shape.
1403 * - encoding: set by user.
1404 * - decoding: unused
1409 * amount of previous MV predictors (2a+1 x 2a+1 square).
1410 * - encoding: set by user.
1411 * - decoding: unused
1413 int last_predictor_count;
1416 * pre pass for motion estimation.
1417 * - encoding: set by user.
1418 * - decoding: unused
1423 * motion estimation pre pass compare function.
1424 * - encoding: set by user.
1425 * - decoding: unused
1430 * ME pre pass diamond size & shape.
1431 * - encoding: set by user.
1432 * - decoding: unused
1437 * subpel ME quality.
1438 * - encoding: set by user.
1439 * - decoding: unused
1441 int me_subpel_quality;
1444 * callback to negotiate the pixelFormat.
1445 * @param fmt is the list of formats which are supported by the codec,
1446 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1447 * the first is allways the native one
1448 * @return the choosen format
1449 * - encoding: unused
1450 * - decoding: set by user, if not set then the native format will always be choosen
1452 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1455 * DTG active format information (additionnal aspect ratio
1456 * information only used in DVB MPEG2 transport streams). 0 if
1459 * - encoding: unused.
1460 * - decoding: set by decoder
1462 int dtg_active_format;
1463 #define FF_DTG_AFD_SAME 8
1464 #define FF_DTG_AFD_4_3 9
1465 #define FF_DTG_AFD_16_9 10
1466 #define FF_DTG_AFD_14_9 11
1467 #define FF_DTG_AFD_4_3_SP_14_9 13
1468 #define FF_DTG_AFD_16_9_SP_14_9 14
1469 #define FF_DTG_AFD_SP_4_3 15
1472 * Maximum motion estimation search range in subpel units.
1473 * if 0 then no limit
1475 * - encoding: set by user.
1476 * - decoding: unused.
1481 * intra quantizer bias.
1482 * - encoding: set by user.
1483 * - decoding: unused
1485 int intra_quant_bias;
1486 #define FF_DEFAULT_QUANT_BIAS 999999
1489 * inter quantizer bias.
1490 * - encoding: set by user.
1491 * - decoding: unused
1493 int inter_quant_bias;
1497 * - encoding: unused.
1498 * - decoding: which clrtable should be used for 8bit RGB images
1499 * table have to be stored somewhere FIXME
1504 * internal_buffer count.
1505 * Don't touch, used by lavc default_get_buffer()
1507 int internal_buffer_count;
1511 * Don't touch, used by lavc default_get_buffer()
1513 void *internal_buffer;
1515 #define FF_LAMBDA_SHIFT 7
1516 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1517 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1518 #define FF_LAMBDA_MAX (256*128-1)
1520 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1522 * global quality for codecs which cannot change it per frame.
1523 * this should be proportional to MPEG1/2/4 qscale.
1524 * - encoding: set by user.
1525 * - decoding: unused
1529 #define FF_CODER_TYPE_VLC 0
1530 #define FF_CODER_TYPE_AC 1
1533 * - encoding: set by user.
1534 * - decoding: unused
1540 * - encoding: set by user.
1541 * - decoding: unused
1547 * - encoding: unused
1548 * - decoding: set by user.
1550 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1555 * - encoding: unused
1556 * - decoding: set by user.
1559 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1560 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1561 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1564 * XVideo Motion Acceleration
1565 * - encoding: forbidden
1566 * - decoding: set by decoder
1568 int xvmc_acceleration;
1571 * macroblock decision mode
1572 * - encoding: set by user.
1573 * - decoding: unused
1576 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1577 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1578 #define FF_MB_DECISION_RD 2 ///< rate distoration
1581 * custom intra quantization matrix
1582 * - encoding: set by user, can be NULL
1583 * - decoding: set by lavc
1585 uint16_t *intra_matrix;
1588 * custom inter quantization matrix
1589 * - encoding: set by user, can be NULL
1590 * - decoding: set by lavc
1592 uint16_t *inter_matrix;
1595 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1596 * this is used to workaround some encoder bugs
1597 * - encoding: unused
1598 * - decoding: set by user, will be converted to upper case by lavc during init
1600 unsigned int stream_codec_tag;
1603 * scene change detection threshold.
1604 * 0 is default, larger means fewer detected scene changes
1605 * - encoding: set by user.
1606 * - decoding: unused
1608 int scenechange_threshold;
1611 * minimum lagrange multipler
1612 * - encoding: set by user.
1613 * - decoding: unused
1618 * maximum lagrange multipler
1619 * - encoding: set by user.
1620 * - decoding: unused
1625 * Palette control structure
1626 * - encoding: ??? (no palette-enabled encoder yet)
1627 * - decoding: set by user.
1629 struct AVPaletteControl *palctrl;
1632 * noise reduction strength
1633 * - encoding: set by user.
1634 * - decoding: unused
1636 int noise_reduction;
1639 * called at the beginning of a frame to get cr buffer for it.
1640 * buffer type (size, hints) must be the same. lavc won't check it.
1641 * lavc will pass previous buffer in pic, function should return
1642 * same buffer or new buffer with old frame "painted" into it.
1643 * if pic.data[0] == NULL must behave like get_buffer().
1644 * - encoding: unused
1645 * - decoding: set by lavc, user can override
1647 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1650 * number of bits which should be loaded into the rc buffer before decoding starts
1651 * - encoding: set by user.
1652 * - decoding: unused
1654 int rc_initial_buffer_occupancy;
1658 * - encoding: set by user.
1659 * - decoding: unused
1661 int inter_threshold;
1665 * - encoding: set by user.
1666 * - decoding: set by user.
1671 * simulates errors in the bitstream to test error concealment.
1672 * - encoding: set by user.
1673 * - decoding: unused.
1678 * MP3 antialias algorithm, see FF_AA_* below.
1679 * - encoding: unused
1680 * - decoding: set by user
1683 #define FF_AA_AUTO 0
1684 #define FF_AA_FASTINT 1 //not implemented yet
1686 #define FF_AA_FLOAT 3
1688 * Quantizer noise shaping.
1689 * - encoding: set by user
1690 * - decoding: unused
1692 int quantizer_noise_shaping;
1696 * is used to decide how many independant tasks should be passed to execute()
1697 * - encoding: set by user
1698 * - decoding: set by user
1703 * the codec may call this to execute several independant things. it will return only after
1704 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1705 * default implementation will execute the parts serially
1706 * @param count the number of things to execute
1707 * - encoding: set by lavc, user can override
1708 * - decoding: set by lavc, user can override
1710 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1714 * can be used by execute() to store some per AVCodecContext stuff.
1715 * - encoding: set by execute()
1716 * - decoding: set by execute()
1718 void *thread_opaque;
1721 * Motion estimation threshold. under which no motion estimation is
1722 * performed, but instead the user specified motion vectors are used
1724 * - encoding: set by user
1725 * - decoding: unused
1730 * Macroblock threshold. under which the user specified macroblock types will be used
1731 * - encoding: set by user
1732 * - decoding: unused
1737 * precision of the intra dc coefficient - 8.
1738 * - encoding: set by user
1739 * - decoding: unused
1741 int intra_dc_precision;
1744 * noise vs. sse weight for the nsse comparsion function.
1745 * - encoding: set by user
1746 * - decoding: unused
1751 * number of macroblock rows at the top which are skipped.
1752 * - encoding: unused
1753 * - decoding: set by user
1758 * number of macroblock rows at the bottom which are skipped.
1759 * - encoding: unused
1760 * - decoding: set by user
1766 * - encoding: set by user
1767 * - decoding: set by lavc
1770 #define FF_PROFILE_UNKNOWN -99
1774 * - encoding: set by user
1775 * - decoding: set by lavc
1778 #define FF_LEVEL_UNKNOWN -99
1781 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1782 * - encoding: unused
1783 * - decoding: set by user
1788 * bitsream width / height. may be different from width/height if lowres
1789 * or other things are used
1790 * - encoding: unused
1791 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1793 int coded_width, coded_height;
1796 * frame skip threshold
1797 * - encoding: set by user
1798 * - decoding: unused
1800 int frame_skip_threshold;
1804 * - encoding: set by user
1805 * - decoding: unused
1807 int frame_skip_factor;
1810 * frame skip exponent
1811 * - encoding: set by user
1812 * - decoding: unused
1817 * frame skip comparission function
1818 * - encoding: set by user.
1819 * - decoding: unused
1824 * border processing masking. raises the quantizer for mbs on the borders
1826 * - encoding: set by user
1827 * - decoding: unused
1829 float border_masking;
1832 * minimum MB lagrange multipler.
1833 * - encoding: set by user.
1834 * - decoding: unused
1839 * maximum MB lagrange multipler.
1840 * - encoding: set by user.
1841 * - decoding: unused
1847 * - encoding: set by user.
1848 * - decoding: unused
1850 int me_penalty_compensation;
1854 * - encoding: unused
1855 * - decoding: set by user.
1857 enum AVDiscard skip_loop_filter;
1861 * - encoding: unused
1862 * - decoding: set by user.
1864 enum AVDiscard skip_idct;
1868 * - encoding: unused
1869 * - decoding: set by user.
1871 enum AVDiscard skip_frame;
1875 * - encoding: set by user.
1876 * - decoding: unused
1882 * - encoding: set by user.
1883 * - decoding: unused
1888 * constant rate factor - quality-based VBR - values ~correspond to qps
1889 * - encoding: set by user.
1890 * - decoding: unused
1895 * constant quantization parameter rate control method
1896 * - encoding: set by user.
1897 * - decoding: unused
1903 * - encoding: set by user.
1904 * - decoding: unused
1909 * number of reference frames
1910 * - encoding: set by user.
1911 * - decoding: unused
1916 * chroma qp offset from luma
1917 * - encoding: set by user.
1918 * - decoding: unused
1923 * influences how often b-frames are used
1924 * - encoding: set by user.
1925 * - decoding: unused
1930 * trellis RD quantization
1931 * - encoding: set by user.
1932 * - decoding: unused
1937 * reduce fluctuations in qp (before curve compression)
1938 * - encoding: set by user.
1939 * - decoding: unused
1941 float complexityblur;
1944 * in-loop deblocking filter alphac0 parameter
1945 * alpha is in the range -6...6
1946 * - encoding: set by user.
1947 * - decoding: unused
1952 * in-loop deblocking filter beta parameter
1953 * beta is in the range -6...6
1954 * - encoding: set by user.
1955 * - decoding: unused
1960 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1961 * - encoding: set by user.
1962 * - decoding: unused
1965 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1966 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1967 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1968 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1969 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1972 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1973 * - encoding: set by user.
1974 * - decoding: unused
1979 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1980 * - encoding: set by user.
1981 * - decoding: unused
1986 * multiplied by qscale for each frame and added to scene_change_score
1987 * - encoding: set by user.
1988 * - decoding: unused
1990 int scenechange_factor;
1994 * note: value depends upon the compare functin used for fullpel ME
1995 * - encoding: set by user.
1996 * - decoding: unused
2001 * adjusts sensitivity of b_frame_strategy 1
2002 * - encoding: set by user.
2003 * - decoding: unused
2008 * - encoding: set by user.
2009 * - decoding: unused
2011 int compression_level;
2012 #define FF_COMPRESSION_DEFAULT -1
2015 * sets whether to use LPC mode - used by FLAC encoder
2016 * - encoding: set by user.
2017 * - decoding: unused.
2022 * LPC coefficient precision - used by FLAC encoder
2023 * - encoding: set by user.
2024 * - decoding: unused.
2026 int lpc_coeff_precision;
2029 * - encoding: set by user.
2030 * - decoding: unused.
2032 int min_prediction_order;
2035 * - encoding: set by user.
2036 * - decoding: unused.
2038 int max_prediction_order;
2041 * search method for selecting prediction order
2042 * - encoding: set by user.
2043 * - decoding: unused.
2045 int prediction_order_method;
2048 * - encoding: set by user.
2049 * - decoding: unused.
2051 int min_partition_order;
2054 * - encoding: set by user.
2055 * - decoding: unused.
2057 int max_partition_order;
2063 typedef struct AVCodec {
2065 enum CodecType type;
2068 int (*init)(AVCodecContext *);
2069 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2070 int (*close)(AVCodecContext *);
2071 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2072 uint8_t *buf, int buf_size);
2074 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2075 void *dummy; // FIXME remove next time we break binary compatibility
2077 struct AVCodec *next;
2078 void (*flush)(AVCodecContext *);
2079 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2080 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2084 * four components are given, that's all.
2085 * the last component is alpha
2087 typedef struct AVPicture {
2089 int linesize[4]; ///< number of bytes per line
2094 * This structure defines a method for communicating palette changes
2095 * between and demuxer and a decoder.
2096 * this is totally broken, palette changes should be sent as AVPackets
2098 #define AVPALETTE_SIZE 1024
2099 #define AVPALETTE_COUNT 256
2100 typedef struct AVPaletteControl {
2102 /* demuxer sets this to 1 to indicate the palette has changed;
2103 * decoder resets to 0 */
2104 int palette_changed;
2106 /* 4-byte ARGB palette entries, stored in native byte order; note that
2107 * the individual palette components should be on a 8-bit scale; if
2108 * the palette data comes from a IBM VGA native format, the component
2109 * data is probably 6 bits in size and needs to be scaled */
2110 unsigned int palette[AVPALETTE_COUNT];
2112 } AVPaletteControl attribute_deprecated;
2114 typedef struct AVSubtitleRect {
2121 uint32_t *rgba_palette;
2125 typedef struct AVSubtitle {
2126 uint16_t format; /* 0 = graphics */
2127 uint32_t start_display_time; /* relative to packet pts, in ms */
2128 uint32_t end_display_time; /* relative to packet pts, in ms */
2130 AVSubtitleRect *rects;
2133 extern AVCodec ac3_encoder;
2134 extern AVCodec mp2_encoder;
2135 extern AVCodec mp3lame_encoder;
2136 extern AVCodec oggvorbis_encoder;
2137 extern AVCodec faac_encoder;
2138 extern AVCodec flac_encoder;
2139 extern AVCodec xvid_encoder;
2140 extern AVCodec mpeg1video_encoder;
2141 extern AVCodec mpeg2video_encoder;
2142 extern AVCodec h261_encoder;
2143 extern AVCodec h263_encoder;
2144 extern AVCodec h263p_encoder;
2145 extern AVCodec flv_encoder;
2146 extern AVCodec rv10_encoder;
2147 extern AVCodec rv20_encoder;
2148 extern AVCodec dvvideo_encoder;
2149 extern AVCodec mjpeg_encoder;
2150 extern AVCodec ljpeg_encoder;
2151 extern AVCodec jpegls_encoder;
2152 extern AVCodec png_encoder;
2153 extern AVCodec ppm_encoder;
2154 extern AVCodec pgm_encoder;
2155 extern AVCodec pgmyuv_encoder;
2156 extern AVCodec pbm_encoder;
2157 extern AVCodec pam_encoder;
2158 extern AVCodec mpeg4_encoder;
2159 extern AVCodec msmpeg4v1_encoder;
2160 extern AVCodec msmpeg4v2_encoder;
2161 extern AVCodec msmpeg4v3_encoder;
2162 extern AVCodec wmv1_encoder;
2163 extern AVCodec wmv2_encoder;
2164 extern AVCodec huffyuv_encoder;
2165 extern AVCodec ffvhuff_encoder;
2166 extern AVCodec h264_encoder;
2167 extern AVCodec asv1_encoder;
2168 extern AVCodec asv2_encoder;
2169 extern AVCodec vcr1_encoder;
2170 extern AVCodec ffv1_encoder;
2171 extern AVCodec snow_encoder;
2172 extern AVCodec vorbis_encoder;
2173 extern AVCodec mdec_encoder;
2174 extern AVCodec zlib_encoder;
2175 extern AVCodec sonic_encoder;
2176 extern AVCodec sonic_ls_encoder;
2177 extern AVCodec svq1_encoder;
2178 extern AVCodec x264_encoder;
2180 extern AVCodec h263_decoder;
2181 extern AVCodec h261_decoder;
2182 extern AVCodec mpeg4_decoder;
2183 extern AVCodec msmpeg4v1_decoder;
2184 extern AVCodec msmpeg4v2_decoder;
2185 extern AVCodec msmpeg4v3_decoder;
2186 extern AVCodec wmv1_decoder;
2187 extern AVCodec wmv2_decoder;
2188 extern AVCodec vc1_decoder;
2189 extern AVCodec wmv3_decoder;
2190 extern AVCodec mpeg1video_decoder;
2191 extern AVCodec mpeg2video_decoder;
2192 extern AVCodec mpegvideo_decoder;
2193 extern AVCodec mpeg_xvmc_decoder;
2194 extern AVCodec h263i_decoder;
2195 extern AVCodec flv_decoder;
2196 extern AVCodec rv10_decoder;
2197 extern AVCodec rv20_decoder;
2198 extern AVCodec rv30_decoder;
2199 extern AVCodec rv40_decoder;
2200 extern AVCodec svq1_decoder;
2201 extern AVCodec svq3_decoder;
2202 extern AVCodec dvvideo_decoder;
2203 extern AVCodec wmav1_decoder;
2204 extern AVCodec wmav2_decoder;
2205 extern AVCodec mjpeg_decoder;
2206 extern AVCodec mjpegb_decoder;
2207 extern AVCodec sp5x_decoder;
2208 extern AVCodec png_decoder;
2209 extern AVCodec mp2_decoder;
2210 extern AVCodec mp3_decoder;
2211 extern AVCodec mp3adu_decoder;
2212 extern AVCodec mp3on4_decoder;
2213 extern AVCodec qdm2_decoder;
2214 extern AVCodec cook_decoder;
2215 extern AVCodec truespeech_decoder;
2216 extern AVCodec tta_decoder;
2217 extern AVCodec mace3_decoder;
2218 extern AVCodec mace6_decoder;
2219 extern AVCodec huffyuv_decoder;
2220 extern AVCodec ffvhuff_decoder;
2221 extern AVCodec oggvorbis_decoder;
2222 extern AVCodec cyuv_decoder;
2223 extern AVCodec h264_decoder;
2224 extern AVCodec indeo3_decoder;
2225 extern AVCodec vp3_decoder;
2226 extern AVCodec theora_decoder;
2227 extern AVCodec vp5_decoder;
2228 extern AVCodec vp6_decoder;
2229 extern AVCodec vp6f_decoder;
2230 extern AVCodec amr_nb_decoder;
2231 extern AVCodec amr_nb_encoder;
2232 extern AVCodec amr_wb_encoder;
2233 extern AVCodec amr_wb_decoder;
2234 extern AVCodec aac_decoder;
2235 extern AVCodec mpeg4aac_decoder;
2236 extern AVCodec asv1_decoder;
2237 extern AVCodec asv2_decoder;
2238 extern AVCodec vcr1_decoder;
2239 extern AVCodec cljr_decoder;
2240 extern AVCodec ffv1_decoder;
2241 extern AVCodec snow_decoder;
2242 extern AVCodec fourxm_decoder;
2243 extern AVCodec mdec_decoder;
2244 extern AVCodec roq_decoder;
2245 extern AVCodec interplay_video_decoder;
2246 extern AVCodec xan_wc3_decoder;
2247 extern AVCodec rpza_decoder;
2248 extern AVCodec cinepak_decoder;
2249 extern AVCodec msrle_decoder;
2250 extern AVCodec msvideo1_decoder;
2251 extern AVCodec vqa_decoder;
2252 extern AVCodec idcin_decoder;
2253 extern AVCodec eightbps_decoder;
2254 extern AVCodec smc_decoder;
2255 extern AVCodec flic_decoder;
2256 extern AVCodec vmdvideo_decoder;
2257 extern AVCodec vmdaudio_decoder;
2258 extern AVCodec truemotion1_decoder;
2259 extern AVCodec truemotion2_decoder;
2260 extern AVCodec mszh_decoder;
2261 extern AVCodec zlib_decoder;
2262 extern AVCodec ra_144_decoder;
2263 extern AVCodec ra_288_decoder;
2264 extern AVCodec roq_dpcm_decoder;
2265 extern AVCodec interplay_dpcm_decoder;
2266 extern AVCodec xan_dpcm_decoder;
2267 extern AVCodec sol_dpcm_decoder;
2268 extern AVCodec sonic_decoder;
2269 extern AVCodec qtrle_decoder;
2270 extern AVCodec flac_decoder;
2271 extern AVCodec tscc_decoder;
2272 extern AVCodec cscd_decoder;
2273 extern AVCodec nuv_decoder;
2274 extern AVCodec ulti_decoder;
2275 extern AVCodec qdraw_decoder;
2276 extern AVCodec xl_decoder;
2277 extern AVCodec qpeg_decoder;
2278 extern AVCodec shorten_decoder;
2279 extern AVCodec loco_decoder;
2280 extern AVCodec wnv1_decoder;
2281 extern AVCodec aasc_decoder;
2282 extern AVCodec alac_decoder;
2283 extern AVCodec ws_snd1_decoder;
2284 extern AVCodec indeo2_decoder;
2285 extern AVCodec vorbis_decoder;
2286 extern AVCodec fraps_decoder;
2287 extern AVCodec libgsm_encoder;
2288 extern AVCodec libgsm_decoder;
2289 extern AVCodec bmp_decoder;
2290 extern AVCodec mmvideo_decoder;
2291 extern AVCodec zmbv_decoder;
2292 extern AVCodec avs_decoder;
2293 extern AVCodec smacker_decoder;
2294 extern AVCodec smackaud_decoder;
2295 extern AVCodec kmvc_decoder;
2296 extern AVCodec flashsv_decoder;
2297 extern AVCodec cavs_decoder;
2298 extern AVCodec vmnc_decoder;
2299 extern AVCodec wavpack_decoder;
2300 extern AVCodec targa_decoder;
2301 extern AVCodec dsicinvideo_decoder;
2302 extern AVCodec dsicinaudio_decoder;
2303 extern AVCodec tiertexseqvideo_decoder;
2304 extern AVCodec tiff_decoder;
2307 #define PCM_CODEC(id, name) \
2308 extern AVCodec name ## _decoder; \
2309 extern AVCodec name ## _encoder
2311 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2312 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2313 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2314 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2315 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2316 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2317 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2318 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2319 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2320 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2321 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2322 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2323 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2324 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2325 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2326 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2327 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2331 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2332 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2333 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2334 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2335 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2336 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2337 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2338 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2339 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2340 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2341 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2342 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2343 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2344 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2345 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2346 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2347 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2348 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2352 /* dummy raw video codec */
2353 extern AVCodec rawvideo_encoder;
2354 extern AVCodec rawvideo_decoder;
2356 /* the following codecs use external GPL libs */
2357 extern AVCodec ac3_decoder;
2358 extern AVCodec dts_decoder;
2361 extern AVCodec dvdsub_encoder;
2362 extern AVCodec dvdsub_decoder;
2363 extern AVCodec dvbsub_encoder;
2364 extern AVCodec dvbsub_decoder;
2368 struct ReSampleContext;
2369 struct AVResampleContext;
2371 typedef struct ReSampleContext ReSampleContext;
2373 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2374 int output_rate, int input_rate);
2375 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2376 void audio_resample_close(ReSampleContext *s);
2378 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2379 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2380 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2381 void av_resample_close(struct AVResampleContext *c);
2383 /* YUV420 format is assumed ! */
2385 struct ImgReSampleContext;
2387 typedef struct ImgReSampleContext ImgReSampleContext;
2389 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2390 int input_width, int input_height);
2392 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2393 int iwidth, int iheight,
2394 int topBand, int bottomBand,
2395 int leftBand, int rightBand,
2396 int padtop, int padbottom,
2397 int padleft, int padright);
2400 void img_resample(ImgReSampleContext *s,
2401 AVPicture *output, const AVPicture *input);
2403 void img_resample_close(ImgReSampleContext *s);
2406 * Allocate memory for a picture. Call avpicture_free to free it.
2408 * @param picture the picture to be filled in.
2409 * @param pix_fmt the format of the picture.
2410 * @param width the width of the picture.
2411 * @param height the height of the picture.
2412 * @return 0 if successful, -1 if not.
2414 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2416 /* Free a picture previously allocated by avpicture_alloc. */
2417 void avpicture_free(AVPicture *picture);
2419 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2420 int pix_fmt, int width, int height);
2421 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2422 unsigned char *dest, int dest_size);
2423 int avpicture_get_size(int pix_fmt, int width, int height);
2424 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2425 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2426 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2427 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2428 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2430 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2431 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2432 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2433 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2434 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2435 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2437 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2439 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2440 int has_alpha, int *loss_ptr);
2442 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2443 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2444 int img_get_alpha_info(const AVPicture *src,
2445 int pix_fmt, int width, int height);
2447 /* convert among pixel formats */
2448 int img_convert(AVPicture *dst, int dst_pix_fmt,
2449 const AVPicture *src, int pix_fmt,
2450 int width, int height);
2452 /* deinterlace a picture */
2453 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2454 int pix_fmt, int width, int height);
2456 /* external high level API */
2458 extern AVCodec *first_avcodec;
2460 /* returns LIBAVCODEC_VERSION_INT constant */
2461 unsigned avcodec_version(void);
2462 /* returns LIBAVCODEC_BUILD constant */
2463 unsigned avcodec_build(void);
2464 void avcodec_init(void);
2466 void register_avcodec(AVCodec *format);
2467 AVCodec *avcodec_find_encoder(enum CodecID id);
2468 AVCodec *avcodec_find_encoder_by_name(const char *name);
2469 AVCodec *avcodec_find_decoder(enum CodecID id);
2470 AVCodec *avcodec_find_decoder_by_name(const char *name);
2471 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2473 void avcodec_get_context_defaults(AVCodecContext *s);
2474 AVCodecContext *avcodec_alloc_context(void);
2475 void avcodec_get_frame_defaults(AVFrame *pic);
2476 AVFrame *avcodec_alloc_frame(void);
2478 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2479 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2480 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2481 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2482 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2483 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2485 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2486 void avcodec_thread_free(AVCodecContext *s);
2487 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2488 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2489 //FIXME func typedef
2492 * opens / inits the AVCodecContext.
2495 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2498 * Decode an audio frame.
2500 * @param avctx the codec context.
2501 * @param samples output buffer, 16 byte aligned
2502 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2503 * @param buf input buffer, 16 byte aligned
2504 * @param buf_size the input buffer size
2505 * @return 0 if successful, -1 if not.
2508 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2509 int *frame_size_ptr,
2510 uint8_t *buf, int buf_size);
2511 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2512 int *got_picture_ptr,
2513 uint8_t *buf, int buf_size);
2514 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2516 const uint8_t *buf, int buf_size);
2517 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2519 uint8_t *buf, int buf_size);
2520 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2521 const short *samples);
2522 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2523 const AVFrame *pict);
2524 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2525 const AVSubtitle *sub);
2527 int avcodec_close(AVCodecContext *avctx);
2529 void avcodec_register_all(void);
2531 void avcodec_flush_buffers(AVCodecContext *avctx);
2533 void avcodec_default_free_buffers(AVCodecContext *s);
2535 /* misc usefull functions */
2538 * returns a single letter to describe the picture type
2540 char av_get_pict_type_char(int pict_type);
2543 * returns codec bits per sample
2545 int av_get_bits_per_sample(enum CodecID codec_id);
2548 typedef struct AVCodecParserContext {
2550 struct AVCodecParser *parser;
2551 int64_t frame_offset; /* offset of the current frame */
2552 int64_t cur_offset; /* current offset
2553 (incremented by each av_parser_parse()) */
2554 int64_t last_frame_offset; /* offset of the last frame */
2556 int pict_type; /* XXX: put it back in AVCodecContext */
2557 int repeat_pict; /* XXX: put it back in AVCodecContext */
2558 int64_t pts; /* pts of the current frame */
2559 int64_t dts; /* dts of the current frame */
2564 int fetch_timestamp;
2566 #define AV_PARSER_PTS_NB 4
2567 int cur_frame_start_index;
2568 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2569 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2570 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2573 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2574 } AVCodecParserContext;
2576 typedef struct AVCodecParser {
2577 int codec_ids[5]; /* several codec IDs are permitted */
2579 int (*parser_init)(AVCodecParserContext *s);
2580 int (*parser_parse)(AVCodecParserContext *s,
2581 AVCodecContext *avctx,
2582 uint8_t **poutbuf, int *poutbuf_size,
2583 const uint8_t *buf, int buf_size);
2584 void (*parser_close)(AVCodecParserContext *s);
2585 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2586 struct AVCodecParser *next;
2589 extern AVCodecParser *av_first_parser;
2591 void av_register_codec_parser(AVCodecParser *parser);
2592 AVCodecParserContext *av_parser_init(int codec_id);
2593 int av_parser_parse(AVCodecParserContext *s,
2594 AVCodecContext *avctx,
2595 uint8_t **poutbuf, int *poutbuf_size,
2596 const uint8_t *buf, int buf_size,
2597 int64_t pts, int64_t dts);
2598 int av_parser_change(AVCodecParserContext *s,
2599 AVCodecContext *avctx,
2600 uint8_t **poutbuf, int *poutbuf_size,
2601 const uint8_t *buf, int buf_size, int keyframe);
2602 void av_parser_close(AVCodecParserContext *s);
2604 extern AVCodecParser mpegvideo_parser;
2605 extern AVCodecParser mpeg4video_parser;
2606 extern AVCodecParser cavsvideo_parser;
2607 extern AVCodecParser h261_parser;
2608 extern AVCodecParser h263_parser;
2609 extern AVCodecParser h264_parser;
2610 extern AVCodecParser mjpeg_parser;
2611 extern AVCodecParser pnm_parser;
2612 extern AVCodecParser mpegaudio_parser;
2613 extern AVCodecParser ac3_parser;
2614 extern AVCodecParser dvdsub_parser;
2615 extern AVCodecParser dvbsub_parser;
2616 extern AVCodecParser aac_parser;
2619 typedef struct AVBitStreamFilterContext {
2621 struct AVBitStreamFilter *filter;
2622 AVCodecParserContext *parser;
2623 struct AVBitStreamFilterContext *next;
2624 } AVBitStreamFilterContext;
2627 typedef struct AVBitStreamFilter {
2630 int (*filter)(AVBitStreamFilterContext *bsfc,
2631 AVCodecContext *avctx, const char *args,
2632 uint8_t **poutbuf, int *poutbuf_size,
2633 const uint8_t *buf, int buf_size, int keyframe);
2634 struct AVBitStreamFilter *next;
2635 } AVBitStreamFilter;
2637 extern AVBitStreamFilter *av_first_bitstream_filter;
2639 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2640 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2641 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2642 AVCodecContext *avctx, const char *args,
2643 uint8_t **poutbuf, int *poutbuf_size,
2644 const uint8_t *buf, int buf_size, int keyframe);
2645 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2647 extern AVBitStreamFilter dump_extradata_bsf;
2648 extern AVBitStreamFilter remove_extradata_bsf;
2649 extern AVBitStreamFilter noise_bsf;
2653 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2654 /* for static data only */
2655 /* call av_free_static to release all staticaly allocated tables */
2656 void av_free_static(void);
2657 void *av_mallocz_static(unsigned int size);
2658 void *av_realloc_static(void *ptr, unsigned int size);
2660 void img_copy(AVPicture *dst, const AVPicture *src,
2661 int pix_fmt, int width, int height);
2663 int img_crop(AVPicture *dst, const AVPicture *src,
2664 int pix_fmt, int top_band, int left_band);
2666 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2667 int padtop, int padbottom, int padleft, int padright, int *color);
2670 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2671 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2672 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2673 (((uint8_t*)(x))[1] << 16) | \
2674 (((uint8_t*)(x))[2] << 8) | \
2676 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2677 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2678 (((uint8_t*)(x))[2] << 16) | \
2679 (((uint8_t*)(x))[1] << 8) | \
2683 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2689 #endif /* AVCODEC_H */