2 * copyright (c) 2001 Fabrice Bellard
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 * external api header.
33 #include <sys/types.h> /* size_t */
35 #define AV_STRINGIFY(s) AV_TOSTRING(s)
36 #define AV_TOSTRING(s) #s
38 #define LIBAVCODEC_VERSION_INT ((51<<16)+(16<<8)+0)
39 #define LIBAVCODEC_VERSION 51.16.0
40 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
42 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
44 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
45 #define AV_TIME_BASE 1000000
46 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
51 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
52 CODEC_ID_MPEG2VIDEO_XVMC,
89 CODEC_ID_INTERPLAY_VIDEO,
101 CODEC_ID_TRUEMOTION1,
129 CODEC_ID_TRUEMOTION2,
146 /* various pcm "codecs" */
147 CODEC_ID_PCM_S16LE= 0x10000,
163 CODEC_ID_PCM_S24DAUD,
165 /* various adpcm codecs */
166 CODEC_ID_ADPCM_IMA_QT= 0x11000,
167 CODEC_ID_ADPCM_IMA_WAV,
168 CODEC_ID_ADPCM_IMA_DK3,
169 CODEC_ID_ADPCM_IMA_DK4,
170 CODEC_ID_ADPCM_IMA_WS,
171 CODEC_ID_ADPCM_IMA_SMJPEG,
180 CODEC_ID_ADPCM_YAMAHA,
181 CODEC_ID_ADPCM_SBPRO_4,
182 CODEC_ID_ADPCM_SBPRO_3,
183 CODEC_ID_ADPCM_SBPRO_2,
186 CODEC_ID_AMR_NB= 0x12000,
189 /* RealAudio codecs*/
190 CODEC_ID_RA_144= 0x13000,
193 /* various DPCM codecs */
194 CODEC_ID_ROQ_DPCM= 0x14000,
195 CODEC_ID_INTERPLAY_DPCM,
199 CODEC_ID_MP2= 0x15000,
200 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
219 CODEC_ID_WESTWOOD_SND1,
229 /* subtitle codecs */
230 CODEC_ID_DVD_SUBTITLE= 0x17000,
231 CODEC_ID_DVB_SUBTITLE,
233 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
234 stream (only used by libavformat) */
237 /* CODEC_ID_MP3LAME is absolete */
238 #define CODEC_ID_MP3LAME CODEC_ID_MP3
241 CODEC_TYPE_UNKNOWN = -1,
248 /* currently unused, may be used if 24/32 bits samples ever supported */
249 /* all in native endian */
251 SAMPLE_FMT_NONE = -1,
252 SAMPLE_FMT_U8, ///< unsigned 8 bits
253 SAMPLE_FMT_S16, ///< signed 16 bits
254 SAMPLE_FMT_S24, ///< signed 24 bits
255 SAMPLE_FMT_S32, ///< signed 32 bits
256 SAMPLE_FMT_FLT, ///< float
260 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
263 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
264 * this is mainly needed because some optimized bitstream readers read
265 * 32 or 64 bit at once and could read over the end<br>
266 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
267 * MPEG bitstreams could cause overread and segfault
269 #define FF_INPUT_BUFFER_PADDING_SIZE 8
272 * minimum encoding buffer size.
273 * used to avoid some checks during header writing
275 #define FF_MIN_BUFFER_SIZE 16384
277 /* motion estimation type, EPZS by default */
291 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
292 AVDISCARD_NONE =-16, ///< discard nothing
293 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
294 AVDISCARD_NONREF = 8, ///< discard all non reference
295 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
296 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
297 AVDISCARD_ALL = 48, ///< discard all
300 typedef struct RcOverride{
303 int qscale; // if this is 0 then quality_factor will be used instead
304 float quality_factor;
307 #define FF_MAX_B_FRAMES 16
310 these flags can be passed in AVCodecContext.flags before initing
311 Note: not everything is supported yet.
314 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
315 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
316 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
317 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
318 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
319 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
320 /* parent program gurantees that the input for b-frame containing streams is not written to
321 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
322 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
323 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
324 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
325 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
326 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
327 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
328 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
329 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
330 of only at frame boundaries */
331 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
332 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
333 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
334 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
335 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
336 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
337 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
338 /* Fx : Flag for h263+ extra options */
339 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
340 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
341 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
342 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
343 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
344 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
345 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
346 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
347 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
348 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
349 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
350 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
351 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
352 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
353 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
354 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
355 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
356 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
357 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
358 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
359 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
360 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
361 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
362 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
363 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
365 /* Unsupported options :
366 * Syntax Arithmetic coding (SAC)
367 * Reference Picture Selection
368 * Independant Segment Decoding */
370 /* codec capabilities */
372 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
374 * Codec uses get_buffer() for allocating buffers.
375 * direct rendering method 1
377 #define CODEC_CAP_DR1 0x0002
378 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
380 #define CODEC_CAP_PARSE_ONLY 0x0004
381 #define CODEC_CAP_TRUNCATED 0x0008
382 /* codec can export data for HW decoding (XvMC) */
383 #define CODEC_CAP_HWACCEL 0x0010
385 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
386 * if this is not set, the codec is guranteed to never be feeded with NULL data
388 #define CODEC_CAP_DELAY 0x0020
390 * Codec can be fed a final frame with a smaller size.
391 * This can be used to prevent truncation of the last audio samples.
393 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
395 //the following defines may change, don't expect compatibility if you use them
396 #define MB_TYPE_INTRA4x4 0x0001
397 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
398 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
399 #define MB_TYPE_16x16 0x0008
400 #define MB_TYPE_16x8 0x0010
401 #define MB_TYPE_8x16 0x0020
402 #define MB_TYPE_8x8 0x0040
403 #define MB_TYPE_INTERLACED 0x0080
404 #define MB_TYPE_DIRECT2 0x0100 //FIXME
405 #define MB_TYPE_ACPRED 0x0200
406 #define MB_TYPE_GMC 0x0400
407 #define MB_TYPE_SKIP 0x0800
408 #define MB_TYPE_P0L0 0x1000
409 #define MB_TYPE_P1L0 0x2000
410 #define MB_TYPE_P0L1 0x4000
411 #define MB_TYPE_P1L1 0x8000
412 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
413 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
414 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
415 #define MB_TYPE_QUANT 0x00010000
416 #define MB_TYPE_CBP 0x00020000
417 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
421 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
423 typedef struct AVPanScan{
426 * - encoding: set by user.
427 * - decoding: set by lavc
432 * width and height in 1/16 pel
433 * - encoding: set by user.
434 * - decoding: set by lavc
440 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
441 * - encoding: set by user.
442 * - decoding: set by lavc
444 int16_t position[3][2];
447 #define FF_COMMON_FRAME \
449 * pointer to the picture planes.\
450 * this might be different from the first allocated byte\
457 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
458 * this isn't used by lavc unless the default get/release_buffer() is used\
464 * 1 -> keyframe, 0-> not\
465 * - encoding: set by lavc\
466 * - decoding: set by lavc\
471 * picture type of the frame, see ?_TYPE below.\
472 * - encoding: set by lavc for coded_picture (and set by user for input)\
473 * - decoding: set by lavc\
478 * presentation timestamp in time_base units (time when frame should be shown to user)\
479 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
480 * - encoding: MUST be set by user\
481 * - decoding: set by lavc\
486 * picture number in bitstream order.\
487 * - encoding: set by\
488 * - decoding: set by lavc\
490 int coded_picture_number;\
492 * picture number in display order.\
493 * - encoding: set by\
494 * - decoding: set by lavc\
496 int display_picture_number;\
499 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
500 * - encoding: set by lavc for coded_picture (and set by user for input)\
501 * - decoding: set by lavc\
506 * buffer age (1->was last buffer and dint change, 2->..., ...).\
507 * set to INT_MAX if the buffer has not been used yet \
508 * - encoding: unused\
509 * - decoding: MUST be set by get_buffer()\
514 * is this picture used as reference\
515 * - encoding: unused\
516 * - decoding: set by lavc (before get_buffer() call))\
522 * - encoding: unused\
523 * - decoding: set by lavc\
525 int8_t *qscale_table;\
528 * - encoding: unused\
529 * - decoding: set by lavc\
534 * mbskip_table[mb]>=1 if MB didnt change\
535 * stride= mb_width = (width+15)>>4\
536 * - encoding: unused\
537 * - decoding: set by lavc\
539 uint8_t *mbskip_table;\
542 * Motion vector table.\
545 * int mv_sample_log2= 4 - motion_subsample_log2;\
546 * int mb_width= (width+15)>>4;\
547 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
548 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
550 * - encoding: set by user\
551 * - decoding: set by lavc\
553 int16_t (*motion_val[2])[2];\
556 * Macroblock type table\
557 * mb_type_base + mb_width + 2\
558 * - encoding: set by user\
559 * - decoding: set by lavc\
564 * log2 of the size of the block which a single vector in motion_val represents: \
565 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
566 * - encoding: unused\
567 * - decoding: set by lavc\
569 uint8_t motion_subsample_log2;\
572 * for some private data of the user\
573 * - encoding: unused\
574 * - decoding: set by user\
580 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
581 * - decoding: unused\
586 * type of the buffer (to keep track of who has to dealloc data[*])\
587 * - encoding: set by the one who allocs it\
588 * - decoding: set by the one who allocs it\
589 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
594 * when decoding, this signal how much the picture must be delayed.\
595 * extra_delay = repeat_pict / (2*fps)\
596 * - encoding: unused\
597 * - decoding: set by lavc\
607 * The content of the picture is interlaced.\
608 * - encoding: set by user\
609 * - decoding: set by lavc (default 0)\
611 int interlaced_frame;\
614 * if the content is interlaced, is top field displayed first.\
615 * - encoding: set by user\
616 * - decoding: set by lavc\
618 int top_field_first;\
622 * - encoding: set by user\
623 * - decoding: set by lavc\
625 AVPanScan *pan_scan;\
628 * tell user application that palette has changed from previous frame.\
629 * - encoding: ??? (no palette-enabled encoder yet)\
630 * - decoding: set by lavc (default 0)\
632 int palette_has_changed;\
635 * Codec suggestion on buffer type if != 0\
636 * - encoding: unused\
637 * - decoding: set by lavc (before get_buffer() call))\
643 * - encoding: unused\
644 * - decoding: set by lavc\
649 * Motion referece frame index\
650 * - encoding: set by user\
651 * - decoding: set by lavc\
653 int8_t *ref_index[2];
655 #define FF_QSCALE_TYPE_MPEG1 0
656 #define FF_QSCALE_TYPE_MPEG2 1
657 #define FF_QSCALE_TYPE_H264 2
659 #define FF_BUFFER_TYPE_INTERNAL 1
660 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
661 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
662 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
665 #define FF_I_TYPE 1 // Intra
666 #define FF_P_TYPE 2 // Predicted
667 #define FF_B_TYPE 3 // Bi-dir predicted
668 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
672 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
673 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
674 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
675 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
680 typedef struct AVFrame {
684 #define DEFAULT_FRAME_RATE_BASE 1001000
687 * main external api structure.
689 typedef struct AVCodecContext {
691 * Info on struct for av_log
692 * - set by avcodec_alloc_context
696 * the average bitrate.
697 * - encoding: set by user. unused for constant quantizer encoding
698 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
703 * number of bits the bitstream is allowed to diverge from the reference.
704 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
705 * - encoding: set by user. unused for constant quantizer encoding
708 int bit_rate_tolerance;
712 * - encoding: set by user.
713 * - decoding: set by user.
718 * some codecs needs additionnal format info. It is stored here
719 * - encoding: set by user.
720 * - decoding: set by lavc. (FIXME is this ok?)
725 * motion estimation algorithm used for video coding.
726 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
727 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
728 * - encoding: MUST be set by user.
734 * some codecs need / can use extra-data like huffman tables.
735 * mjpeg: huffman tables
736 * rv10: additional flags
737 * mpeg4: global headers (they can be in the bitstream or here)
738 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
739 * then extradata_size to avoid prolems if its read with the bitstream reader
740 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
741 * - encoding: set/allocated/freed by lavc.
742 * - decoding: set/allocated/freed by user.
748 * this is the fundamental unit of time (in seconds) in terms
749 * of which frame timestamps are represented. for fixed-fps content,
750 * timebase should be 1/framerate and timestamp increments should be
752 * - encoding: MUST be set by user
753 * - decoding: set by lavc.
755 AVRational time_base;
759 * picture width / height.
760 * - encoding: MUST be set by user.
761 * - decoding: set by lavc.
762 * Note, for compatibility its possible to set this instead of
763 * coded_width/height before decoding
767 #define FF_ASPECT_EXTENDED 15
770 * the number of pictures in a group of pitures, or 0 for intra_only.
771 * - encoding: set by user.
777 * pixel format, see PIX_FMT_xxx.
778 * - encoding: set by user.
779 * - decoding: set by lavc.
781 enum PixelFormat pix_fmt;
784 * Frame rate emulation. If not zero lower layer (i.e. format handler)
785 * has to read frames at native frame rate.
786 * - encoding: set by user.
787 * - decoding: unused.
792 * if non NULL, 'draw_horiz_band' is called by the libavcodec
793 * decoder to draw an horizontal band. It improve cache usage. Not
794 * all codecs can do that. You must check the codec capabilities
797 * - decoding: set by user.
798 * @param height the height of the slice
799 * @param y the y position of the slice
800 * @param type 1->top field, 2->bottom field, 3->frame
801 * @param offset offset into the AVFrame.data from which the slice should be read
803 void (*draw_horiz_band)(struct AVCodecContext *s,
804 const AVFrame *src, int offset[4],
805 int y, int type, int height);
808 int sample_rate; ///< samples per sec
812 * audio sample format.
813 * - encoding: set by user.
814 * - decoding: set by lavc.
816 enum SampleFormat sample_fmt; ///< sample format, currenly unused
818 /* the following data should not be initialized */
820 * samples per packet. initialized when calling 'init'
823 int frame_number; ///< audio or video frame number
824 int real_pict_num; ///< returns the real picture number of previous encoded frame
827 * number of frames the decoded output will be delayed relative to
829 * - encoding: set by lavc.
834 /* - encoding parameters */
835 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
836 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
840 * - encoding: set by user.
847 * - encoding: set by user.
853 * maximum quantizer difference etween frames.
854 * - encoding: set by user.
860 * maximum number of b frames between non b frames.
861 * note: the output will be delayed by max_b_frames+1 relative to the input
862 * - encoding: set by user.
868 * qscale factor between ip and b frames.
869 * - encoding: set by user.
872 float b_quant_factor;
874 /** obsolete FIXME remove */
876 #define FF_RC_STRATEGY_XVID 1
878 int b_frame_strategy;
882 * deprecated in favor of skip_idct and skip_frame
884 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
888 struct AVCodec *codec;
892 /* unused, FIXME remove*/
895 int rtp_payload_size; /* The size of the RTP payload: the coder will */
896 /* do it's best to deliver a chunk with size */
897 /* below rtp_payload_size, the chunk will start */
898 /* with a start code on some codecs like H.263 */
899 /* This doesn't take account of any particular */
900 /* headers inside the transmited RTP payload */
903 /* The RTP callback: This function is called */
904 /* every time the encoder has a packet to send */
905 /* Depends on the encoder if the data starts */
906 /* with a Start Code (it should) H.263 does. */
907 /* mb_nb contains the number of macroblocks */
908 /* encoded in the RTP payload */
909 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
911 /* statistics, used for 2-pass encoding */
922 * number of bits used for the previously encoded frame.
923 * - encoding: set by lavc
929 * private data of the user, can be used to carry app specific stuff.
930 * - encoding: set by user
931 * - decoding: set by user
936 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
937 enum CodecID codec_id; /* see CODEC_ID_xxx */
940 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
941 * this is used to workaround some encoder bugs
942 * - encoding: set by user, if not then the default based on codec_id will be used
943 * - decoding: set by user, will be converted to upper case by lavc during init
945 unsigned int codec_tag;
948 * workaround bugs in encoders which sometimes cannot be detected automatically.
949 * - encoding: set by user
950 * - decoding: set by user
953 #define FF_BUG_AUTODETECT 1 ///< autodetection
954 #define FF_BUG_OLD_MSMPEG4 2
955 #define FF_BUG_XVID_ILACE 4
956 #define FF_BUG_UMP4 8
957 #define FF_BUG_NO_PADDING 16
958 #define FF_BUG_AMV 32
959 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
960 #define FF_BUG_QPEL_CHROMA 64
961 #define FF_BUG_STD_QPEL 128
962 #define FF_BUG_QPEL_CHROMA2 256
963 #define FF_BUG_DIRECT_BLOCKSIZE 512
964 #define FF_BUG_EDGE 1024
965 #define FF_BUG_HPEL_CHROMA 2048
966 #define FF_BUG_DC_CLIP 4096
967 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
968 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
971 * luma single coeff elimination threshold.
972 * - encoding: set by user
975 int luma_elim_threshold;
978 * chroma single coeff elimination threshold.
979 * - encoding: set by user
982 int chroma_elim_threshold;
985 * strictly follow the std (MPEG4, ...).
986 * - encoding: set by user
989 int strict_std_compliance;
990 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
991 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
992 #define FF_COMPLIANCE_NORMAL 0
993 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
994 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
997 * qscale offset between ip and b frames.
998 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
999 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1000 * - encoding: set by user.
1001 * - decoding: unused
1003 float b_quant_offset;
1006 * error resilience higher values will detect more errors but may missdetect
1007 * some more or less valid parts as errors.
1008 * - encoding: unused
1009 * - decoding: set by user
1011 int error_resilience;
1012 #define FF_ER_CAREFUL 1
1013 #define FF_ER_COMPLIANT 2
1014 #define FF_ER_AGGRESSIVE 3
1015 #define FF_ER_VERY_AGGRESSIVE 4
1018 * called at the beginning of each frame to get a buffer for it.
1019 * if pic.reference is set then the frame will be read later by lavc
1020 * avcodec_align_dimensions() should be used to find the required width and
1021 * height, as they normally need to be rounded up to the next multiple of 16
1022 * - encoding: unused
1023 * - decoding: set by lavc, user can override
1025 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1028 * called to release buffers which where allocated with get_buffer.
1029 * a released buffer can be reused in get_buffer()
1030 * pic.data[*] must be set to NULL
1031 * - encoding: unused
1032 * - decoding: set by lavc, user can override
1034 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1037 * if 1 the stream has a 1 frame delay during decoding.
1038 * - encoding: set by lavc
1039 * - decoding: set by lavc
1044 * number of bytes per packet if constant and known or 0
1045 * used by some WAV based audio codecs
1049 int parse_only; /* - decoding only: if true, only parsing is done
1050 (function avcodec_parse_frame()). The frame
1051 data is returned. Only MPEG codecs support this now. */
1054 * 0-> h263 quant 1-> mpeg quant.
1055 * - encoding: set by user.
1056 * - decoding: unused
1061 * pass1 encoding statistics output buffer.
1062 * - encoding: set by lavc
1063 * - decoding: unused
1068 * pass2 encoding statistics input buffer.
1069 * concatenated stuff from stats_out of pass1 should be placed here
1070 * - encoding: allocated/set/freed by user
1071 * - decoding: unused
1076 * ratecontrol qmin qmax limiting method.
1077 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1078 * - encoding: set by user.
1079 * - decoding: unused
1087 * ratecontrol override, see RcOverride.
1088 * - encoding: allocated/set/freed by user.
1089 * - decoding: unused
1091 RcOverride *rc_override;
1092 int rc_override_count;
1095 * rate control equation.
1096 * - encoding: set by user
1097 * - decoding: unused
1103 * - encoding: set by user.
1104 * - decoding: unused
1110 * - encoding: set by user.
1111 * - decoding: unused
1116 * decoder bitstream buffer size.
1117 * - encoding: set by user.
1118 * - decoding: unused
1121 float rc_buffer_aggressivity;
1124 * qscale factor between p and i frames.
1125 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1126 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1127 * - encoding: set by user.
1128 * - decoding: unused
1130 float i_quant_factor;
1133 * qscale offset between p and i frames.
1134 * - encoding: set by user.
1135 * - decoding: unused
1137 float i_quant_offset;
1140 * initial complexity for pass1 ratecontrol.
1141 * - encoding: set by user.
1142 * - decoding: unused
1144 float rc_initial_cplx;
1147 * dct algorithm, see FF_DCT_* below.
1148 * - encoding: set by user
1149 * - decoding: unused
1152 #define FF_DCT_AUTO 0
1153 #define FF_DCT_FASTINT 1
1154 #define FF_DCT_INT 2
1155 #define FF_DCT_MMX 3
1156 #define FF_DCT_MLIB 4
1157 #define FF_DCT_ALTIVEC 5
1158 #define FF_DCT_FAAN 6
1161 * luminance masking (0-> disabled).
1162 * - encoding: set by user
1163 * - decoding: unused
1168 * temporary complexity masking (0-> disabled).
1169 * - encoding: set by user
1170 * - decoding: unused
1172 float temporal_cplx_masking;
1175 * spatial complexity masking (0-> disabled).
1176 * - encoding: set by user
1177 * - decoding: unused
1179 float spatial_cplx_masking;
1182 * p block masking (0-> disabled).
1183 * - encoding: set by user
1184 * - decoding: unused
1189 * darkness masking (0-> disabled).
1190 * - encoding: set by user
1191 * - decoding: unused
1196 /* for binary compatibility */
1200 * idct algorithm, see FF_IDCT_* below.
1201 * - encoding: set by user
1202 * - decoding: set by user
1205 #define FF_IDCT_AUTO 0
1206 #define FF_IDCT_INT 1
1207 #define FF_IDCT_SIMPLE 2
1208 #define FF_IDCT_SIMPLEMMX 3
1209 #define FF_IDCT_LIBMPEG2MMX 4
1210 #define FF_IDCT_PS2 5
1211 #define FF_IDCT_MLIB 6
1212 #define FF_IDCT_ARM 7
1213 #define FF_IDCT_ALTIVEC 8
1214 #define FF_IDCT_SH4 9
1215 #define FF_IDCT_SIMPLEARM 10
1216 #define FF_IDCT_H264 11
1217 #define FF_IDCT_VP3 12
1218 #define FF_IDCT_IPP 13
1219 #define FF_IDCT_XVIDMMX 14
1220 #define FF_IDCT_CAVS 15
1221 #define FF_IDCT_SIMPLEARMV5TE 16
1225 * - encoding: set by lavc
1226 * - decoding: set by user (or 0)
1230 * slice offsets in the frame in bytes.
1231 * - encoding: set/allocated by lavc
1232 * - decoding: set/allocated by user (or NULL)
1237 * error concealment flags.
1238 * - encoding: unused
1239 * - decoding: set by user
1241 int error_concealment;
1242 #define FF_EC_GUESS_MVS 1
1243 #define FF_EC_DEBLOCK 2
1246 * dsp_mask could be add used to disable unwanted CPU features
1247 * CPU features (i.e. MMX, SSE. ...)
1249 * with FORCE flag you may instead enable given CPU features
1250 * (Dangerous: usable in case of misdetection, improper usage however will
1251 * result into program crash)
1254 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1255 /* lower 16 bits - CPU features */
1257 #define FF_MM_MMX 0x0001 /* standard MMX */
1258 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1259 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1260 #define FF_MM_SSE 0x0008 /* SSE functions */
1261 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1262 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1263 #endif /* HAVE_MMX */
1265 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1266 #endif /* HAVE_IWMMXT */
1269 * bits per sample/pixel from the demuxer (needed for huffyuv).
1270 * - encoding: set by lavc
1271 * - decoding: set by user
1273 int bits_per_sample;
1276 * prediction method (needed for huffyuv).
1277 * - encoding: set by user
1278 * - decoding: unused
1280 int prediction_method;
1281 #define FF_PRED_LEFT 0
1282 #define FF_PRED_PLANE 1
1283 #define FF_PRED_MEDIAN 2
1286 * sample aspect ratio (0 if unknown).
1287 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1288 * - encoding: set by user.
1289 * - decoding: set by lavc.
1291 AVRational sample_aspect_ratio;
1294 * the picture in the bitstream.
1295 * - encoding: set by lavc
1296 * - decoding: set by lavc
1298 AVFrame *coded_frame;
1302 * - encoding: set by user.
1303 * - decoding: set by user.
1306 #define FF_DEBUG_PICT_INFO 1
1307 #define FF_DEBUG_RC 2
1308 #define FF_DEBUG_BITSTREAM 4
1309 #define FF_DEBUG_MB_TYPE 8
1310 #define FF_DEBUG_QP 16
1311 #define FF_DEBUG_MV 32
1312 #define FF_DEBUG_DCT_COEFF 0x00000040
1313 #define FF_DEBUG_SKIP 0x00000080
1314 #define FF_DEBUG_STARTCODE 0x00000100
1315 #define FF_DEBUG_PTS 0x00000200
1316 #define FF_DEBUG_ER 0x00000400
1317 #define FF_DEBUG_MMCO 0x00000800
1318 #define FF_DEBUG_BUGS 0x00001000
1319 #define FF_DEBUG_VIS_QP 0x00002000
1320 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1324 * - encoding: set by user.
1325 * - decoding: set by user.
1328 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1329 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1330 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1334 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1335 * - decoding: unused
1340 * minimum MB quantizer.
1341 * - encoding: unused
1342 * - decoding: unused
1347 * maximum MB quantizer.
1348 * - encoding: unused
1349 * - decoding: unused
1354 * motion estimation compare function.
1355 * - encoding: set by user.
1356 * - decoding: unused
1360 * subpixel motion estimation compare function.
1361 * - encoding: set by user.
1362 * - decoding: unused
1366 * macroblock compare function (not supported yet).
1367 * - encoding: set by user.
1368 * - decoding: unused
1372 * interlaced dct compare function
1373 * - encoding: set by user.
1374 * - decoding: unused
1377 #define FF_CMP_SAD 0
1378 #define FF_CMP_SSE 1
1379 #define FF_CMP_SATD 2
1380 #define FF_CMP_DCT 3
1381 #define FF_CMP_PSNR 4
1382 #define FF_CMP_BIT 5
1384 #define FF_CMP_ZERO 7
1385 #define FF_CMP_VSAD 8
1386 #define FF_CMP_VSSE 9
1387 #define FF_CMP_NSSE 10
1388 #define FF_CMP_W53 11
1389 #define FF_CMP_W97 12
1390 #define FF_CMP_DCTMAX 13
1391 #define FF_CMP_DCT264 14
1392 #define FF_CMP_CHROMA 256
1395 * ME diamond size & shape.
1396 * - encoding: set by user.
1397 * - decoding: unused
1402 * amount of previous MV predictors (2a+1 x 2a+1 square).
1403 * - encoding: set by user.
1404 * - decoding: unused
1406 int last_predictor_count;
1409 * pre pass for motion estimation.
1410 * - encoding: set by user.
1411 * - decoding: unused
1416 * motion estimation pre pass compare function.
1417 * - encoding: set by user.
1418 * - decoding: unused
1423 * ME pre pass diamond size & shape.
1424 * - encoding: set by user.
1425 * - decoding: unused
1430 * subpel ME quality.
1431 * - encoding: set by user.
1432 * - decoding: unused
1434 int me_subpel_quality;
1437 * callback to negotiate the pixelFormat.
1438 * @param fmt is the list of formats which are supported by the codec,
1439 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1440 * the first is allways the native one
1441 * @return the choosen format
1442 * - encoding: unused
1443 * - decoding: set by user, if not set then the native format will always be choosen
1445 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1448 * DTG active format information (additionnal aspect ratio
1449 * information only used in DVB MPEG2 transport streams). 0 if
1452 * - encoding: unused.
1453 * - decoding: set by decoder
1455 int dtg_active_format;
1456 #define FF_DTG_AFD_SAME 8
1457 #define FF_DTG_AFD_4_3 9
1458 #define FF_DTG_AFD_16_9 10
1459 #define FF_DTG_AFD_14_9 11
1460 #define FF_DTG_AFD_4_3_SP_14_9 13
1461 #define FF_DTG_AFD_16_9_SP_14_9 14
1462 #define FF_DTG_AFD_SP_4_3 15
1465 * Maximum motion estimation search range in subpel units.
1466 * if 0 then no limit
1468 * - encoding: set by user.
1469 * - decoding: unused.
1474 * intra quantizer bias.
1475 * - encoding: set by user.
1476 * - decoding: unused
1478 int intra_quant_bias;
1479 #define FF_DEFAULT_QUANT_BIAS 999999
1482 * inter quantizer bias.
1483 * - encoding: set by user.
1484 * - decoding: unused
1486 int inter_quant_bias;
1490 * - encoding: unused.
1491 * - decoding: which clrtable should be used for 8bit RGB images
1492 * table have to be stored somewhere FIXME
1497 * internal_buffer count.
1498 * Don't touch, used by lavc default_get_buffer()
1500 int internal_buffer_count;
1504 * Don't touch, used by lavc default_get_buffer()
1506 void *internal_buffer;
1508 #define FF_LAMBDA_SHIFT 7
1509 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1510 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1511 #define FF_LAMBDA_MAX (256*128-1)
1513 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1515 * global quality for codecs which cannot change it per frame.
1516 * this should be proportional to MPEG1/2/4 qscale.
1517 * - encoding: set by user.
1518 * - decoding: unused
1522 #define FF_CODER_TYPE_VLC 0
1523 #define FF_CODER_TYPE_AC 1
1526 * - encoding: set by user.
1527 * - decoding: unused
1533 * - encoding: set by user.
1534 * - decoding: unused
1540 * - encoding: unused
1541 * - decoding: set by user.
1543 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1548 * - encoding: unused
1549 * - decoding: set by user.
1552 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1553 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1554 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1557 * XVideo Motion Acceleration
1558 * - encoding: forbidden
1559 * - decoding: set by decoder
1561 int xvmc_acceleration;
1564 * macroblock decision mode
1565 * - encoding: set by user.
1566 * - decoding: unused
1569 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1570 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1571 #define FF_MB_DECISION_RD 2 ///< rate distoration
1574 * custom intra quantization matrix
1575 * - encoding: set by user, can be NULL
1576 * - decoding: set by lavc
1578 uint16_t *intra_matrix;
1581 * custom inter quantization matrix
1582 * - encoding: set by user, can be NULL
1583 * - decoding: set by lavc
1585 uint16_t *inter_matrix;
1588 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1589 * this is used to workaround some encoder bugs
1590 * - encoding: unused
1591 * - decoding: set by user, will be converted to upper case by lavc during init
1593 unsigned int stream_codec_tag;
1596 * scene change detection threshold.
1597 * 0 is default, larger means fewer detected scene changes
1598 * - encoding: set by user.
1599 * - decoding: unused
1601 int scenechange_threshold;
1604 * minimum lagrange multipler
1605 * - encoding: set by user.
1606 * - decoding: unused
1611 * maximum lagrange multipler
1612 * - encoding: set by user.
1613 * - decoding: unused
1618 * Palette control structure
1619 * - encoding: ??? (no palette-enabled encoder yet)
1620 * - decoding: set by user.
1622 struct AVPaletteControl *palctrl;
1625 * noise reduction strength
1626 * - encoding: set by user.
1627 * - decoding: unused
1629 int noise_reduction;
1632 * called at the beginning of a frame to get cr buffer for it.
1633 * buffer type (size, hints) must be the same. lavc won't check it.
1634 * lavc will pass previous buffer in pic, function should return
1635 * same buffer or new buffer with old frame "painted" into it.
1636 * if pic.data[0] == NULL must behave like get_buffer().
1637 * - encoding: unused
1638 * - decoding: set by lavc, user can override
1640 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1643 * number of bits which should be loaded into the rc buffer before decoding starts
1644 * - encoding: set by user.
1645 * - decoding: unused
1647 int rc_initial_buffer_occupancy;
1651 * - encoding: set by user.
1652 * - decoding: unused
1654 int inter_threshold;
1658 * - encoding: set by user.
1659 * - decoding: set by user.
1664 * simulates errors in the bitstream to test error concealment.
1665 * - encoding: set by user.
1666 * - decoding: unused.
1671 * MP3 antialias algorithm, see FF_AA_* below.
1672 * - encoding: unused
1673 * - decoding: set by user
1676 #define FF_AA_AUTO 0
1677 #define FF_AA_FASTINT 1 //not implemented yet
1679 #define FF_AA_FLOAT 3
1681 * Quantizer noise shaping.
1682 * - encoding: set by user
1683 * - decoding: unused
1685 int quantizer_noise_shaping;
1689 * is used to decide how many independant tasks should be passed to execute()
1690 * - encoding: set by user
1691 * - decoding: set by user
1696 * the codec may call this to execute several independant things. it will return only after
1697 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1698 * default implementation will execute the parts serially
1699 * @param count the number of things to execute
1700 * - encoding: set by lavc, user can override
1701 * - decoding: set by lavc, user can override
1703 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1707 * can be used by execute() to store some per AVCodecContext stuff.
1708 * - encoding: set by execute()
1709 * - decoding: set by execute()
1711 void *thread_opaque;
1714 * Motion estimation threshold. under which no motion estimation is
1715 * performed, but instead the user specified motion vectors are used
1717 * - encoding: set by user
1718 * - decoding: unused
1723 * Macroblock threshold. under which the user specified macroblock types will be used
1724 * - encoding: set by user
1725 * - decoding: unused
1730 * precision of the intra dc coefficient - 8.
1731 * - encoding: set by user
1732 * - decoding: unused
1734 int intra_dc_precision;
1737 * noise vs. sse weight for the nsse comparsion function.
1738 * - encoding: set by user
1739 * - decoding: unused
1744 * number of macroblock rows at the top which are skipped.
1745 * - encoding: unused
1746 * - decoding: set by user
1751 * number of macroblock rows at the bottom which are skipped.
1752 * - encoding: unused
1753 * - decoding: set by user
1759 * - encoding: set by user
1760 * - decoding: set by lavc
1763 #define FF_PROFILE_UNKNOWN -99
1767 * - encoding: set by user
1768 * - decoding: set by lavc
1771 #define FF_LEVEL_UNKNOWN -99
1774 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1775 * - encoding: unused
1776 * - decoding: set by user
1781 * bitsream width / height. may be different from width/height if lowres
1782 * or other things are used
1783 * - encoding: unused
1784 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1786 int coded_width, coded_height;
1789 * frame skip threshold
1790 * - encoding: set by user
1791 * - decoding: unused
1793 int frame_skip_threshold;
1797 * - encoding: set by user
1798 * - decoding: unused
1800 int frame_skip_factor;
1803 * frame skip exponent
1804 * - encoding: set by user
1805 * - decoding: unused
1810 * frame skip comparission function
1811 * - encoding: set by user.
1812 * - decoding: unused
1817 * border processing masking. raises the quantizer for mbs on the borders
1819 * - encoding: set by user
1820 * - decoding: unused
1822 float border_masking;
1825 * minimum MB lagrange multipler.
1826 * - encoding: set by user.
1827 * - decoding: unused
1832 * maximum MB lagrange multipler.
1833 * - encoding: set by user.
1834 * - decoding: unused
1840 * - encoding: set by user.
1841 * - decoding: unused
1843 int me_penalty_compensation;
1847 * - encoding: unused
1848 * - decoding: set by user.
1850 enum AVDiscard skip_loop_filter;
1854 * - encoding: unused
1855 * - decoding: set by user.
1857 enum AVDiscard skip_idct;
1861 * - encoding: unused
1862 * - decoding: set by user.
1864 enum AVDiscard skip_frame;
1868 * - encoding: set by user.
1869 * - decoding: unused
1875 * - encoding: set by user.
1876 * - decoding: unused
1881 * constant rate factor - quality-based VBR - values ~correspond to qps
1882 * - encoding: set by user.
1883 * - decoding: unused
1888 * constant quantization parameter rate control method
1889 * - encoding: set by user.
1890 * - decoding: unused
1896 * - encoding: set by user.
1897 * - decoding: unused
1902 * number of reference frames
1903 * - encoding: set by user.
1904 * - decoding: unused
1909 * chroma qp offset from luma
1910 * - encoding: set by user.
1911 * - decoding: unused
1916 * influences how often b-frames are used
1917 * - encoding: set by user.
1918 * - decoding: unused
1923 * trellis RD quantization
1924 * - encoding: set by user.
1925 * - decoding: unused
1930 * reduce fluctuations in qp (before curve compression)
1931 * - encoding: set by user.
1932 * - decoding: unused
1934 float complexityblur;
1937 * in-loop deblocking filter alphac0 parameter
1938 * alpha is in the range -6...6
1939 * - encoding: set by user.
1940 * - decoding: unused
1945 * in-loop deblocking filter beta parameter
1946 * beta is in the range -6...6
1947 * - encoding: set by user.
1948 * - decoding: unused
1953 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1954 * - encoding: set by user.
1955 * - decoding: unused
1958 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1959 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1960 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1961 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1962 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1965 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1966 * - encoding: set by user.
1967 * - decoding: unused
1972 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1973 * - encoding: set by user.
1974 * - decoding: unused
1979 * multiplied by qscale for each frame and added to scene_change_score
1980 * - encoding: set by user.
1981 * - decoding: unused
1983 int scenechange_factor;
1987 * note: value depends upon the compare functin used for fullpel ME
1988 * - encoding: set by user.
1989 * - decoding: unused
1994 * adjusts sensitivity of b_frame_strategy 1
1995 * - encoding: set by user.
1996 * - decoding: unused
2001 * - encoding: set by user.
2002 * - decoding: unused
2004 int compression_level;
2005 #define FF_COMPRESSION_DEFAULT -1
2008 * sets whether to use LPC mode - used by FLAC encoder
2009 * - encoding: set by user.
2010 * - decoding: unused.
2015 * LPC coefficient precision - used by FLAC encoder
2016 * - encoding: set by user.
2017 * - decoding: unused.
2019 int lpc_coeff_precision;
2022 * - encoding: set by user.
2023 * - decoding: unused.
2025 int min_prediction_order;
2028 * - encoding: set by user.
2029 * - decoding: unused.
2031 int max_prediction_order;
2034 * search method for selecting prediction order
2035 * - encoding: set by user.
2036 * - decoding: unused.
2038 int prediction_order_method;
2041 * - encoding: set by user.
2042 * - decoding: unused.
2044 int min_partition_order;
2047 * - encoding: set by user.
2048 * - decoding: unused.
2050 int max_partition_order;
2056 typedef struct AVCodec {
2058 enum CodecType type;
2061 int (*init)(AVCodecContext *);
2062 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2063 int (*close)(AVCodecContext *);
2064 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2065 uint8_t *buf, int buf_size);
2067 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2068 void *dummy; // FIXME remove next time we break binary compatibility
2070 struct AVCodec *next;
2071 void (*flush)(AVCodecContext *);
2072 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2073 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2077 * four components are given, that's all.
2078 * the last component is alpha
2080 typedef struct AVPicture {
2082 int linesize[4]; ///< number of bytes per line
2087 * This structure defines a method for communicating palette changes
2088 * between and demuxer and a decoder.
2089 * this is totally broken, palette changes should be sent as AVPackets
2091 #define AVPALETTE_SIZE 1024
2092 #define AVPALETTE_COUNT 256
2093 typedef struct AVPaletteControl {
2095 /* demuxer sets this to 1 to indicate the palette has changed;
2096 * decoder resets to 0 */
2097 int palette_changed;
2099 /* 4-byte ARGB palette entries, stored in native byte order; note that
2100 * the individual palette components should be on a 8-bit scale; if
2101 * the palette data comes from a IBM VGA native format, the component
2102 * data is probably 6 bits in size and needs to be scaled */
2103 unsigned int palette[AVPALETTE_COUNT];
2105 } AVPaletteControl attribute_deprecated;
2107 typedef struct AVSubtitleRect {
2114 uint32_t *rgba_palette;
2118 typedef struct AVSubtitle {
2119 uint16_t format; /* 0 = graphics */
2120 uint32_t start_display_time; /* relative to packet pts, in ms */
2121 uint32_t end_display_time; /* relative to packet pts, in ms */
2123 AVSubtitleRect *rects;
2126 extern AVCodec ac3_encoder;
2127 extern AVCodec mp2_encoder;
2128 extern AVCodec mp3lame_encoder;
2129 extern AVCodec oggvorbis_encoder;
2130 extern AVCodec faac_encoder;
2131 extern AVCodec flac_encoder;
2132 extern AVCodec xvid_encoder;
2133 extern AVCodec mpeg1video_encoder;
2134 extern AVCodec mpeg2video_encoder;
2135 extern AVCodec h261_encoder;
2136 extern AVCodec h263_encoder;
2137 extern AVCodec h263p_encoder;
2138 extern AVCodec flv_encoder;
2139 extern AVCodec rv10_encoder;
2140 extern AVCodec rv20_encoder;
2141 extern AVCodec dvvideo_encoder;
2142 extern AVCodec mjpeg_encoder;
2143 extern AVCodec ljpeg_encoder;
2144 extern AVCodec jpegls_encoder;
2145 extern AVCodec png_encoder;
2146 extern AVCodec ppm_encoder;
2147 extern AVCodec pgm_encoder;
2148 extern AVCodec pgmyuv_encoder;
2149 extern AVCodec pbm_encoder;
2150 extern AVCodec pam_encoder;
2151 extern AVCodec mpeg4_encoder;
2152 extern AVCodec msmpeg4v1_encoder;
2153 extern AVCodec msmpeg4v2_encoder;
2154 extern AVCodec msmpeg4v3_encoder;
2155 extern AVCodec wmv1_encoder;
2156 extern AVCodec wmv2_encoder;
2157 extern AVCodec huffyuv_encoder;
2158 extern AVCodec ffvhuff_encoder;
2159 extern AVCodec h264_encoder;
2160 extern AVCodec asv1_encoder;
2161 extern AVCodec asv2_encoder;
2162 extern AVCodec vcr1_encoder;
2163 extern AVCodec ffv1_encoder;
2164 extern AVCodec snow_encoder;
2165 extern AVCodec mdec_encoder;
2166 extern AVCodec zlib_encoder;
2167 extern AVCodec sonic_encoder;
2168 extern AVCodec sonic_ls_encoder;
2169 extern AVCodec svq1_encoder;
2170 extern AVCodec x264_encoder;
2172 extern AVCodec h263_decoder;
2173 extern AVCodec h261_decoder;
2174 extern AVCodec mpeg4_decoder;
2175 extern AVCodec msmpeg4v1_decoder;
2176 extern AVCodec msmpeg4v2_decoder;
2177 extern AVCodec msmpeg4v3_decoder;
2178 extern AVCodec wmv1_decoder;
2179 extern AVCodec wmv2_decoder;
2180 extern AVCodec vc1_decoder;
2181 extern AVCodec wmv3_decoder;
2182 extern AVCodec mpeg1video_decoder;
2183 extern AVCodec mpeg2video_decoder;
2184 extern AVCodec mpegvideo_decoder;
2185 extern AVCodec mpeg_xvmc_decoder;
2186 extern AVCodec h263i_decoder;
2187 extern AVCodec flv_decoder;
2188 extern AVCodec rv10_decoder;
2189 extern AVCodec rv20_decoder;
2190 extern AVCodec rv30_decoder;
2191 extern AVCodec rv40_decoder;
2192 extern AVCodec svq1_decoder;
2193 extern AVCodec svq3_decoder;
2194 extern AVCodec dvvideo_decoder;
2195 extern AVCodec wmav1_decoder;
2196 extern AVCodec wmav2_decoder;
2197 extern AVCodec mjpeg_decoder;
2198 extern AVCodec mjpegb_decoder;
2199 extern AVCodec sp5x_decoder;
2200 extern AVCodec png_decoder;
2201 extern AVCodec mp2_decoder;
2202 extern AVCodec mp3_decoder;
2203 extern AVCodec mp3adu_decoder;
2204 extern AVCodec mp3on4_decoder;
2205 extern AVCodec qdm2_decoder;
2206 extern AVCodec cook_decoder;
2207 extern AVCodec truespeech_decoder;
2208 extern AVCodec tta_decoder;
2209 extern AVCodec mace3_decoder;
2210 extern AVCodec mace6_decoder;
2211 extern AVCodec huffyuv_decoder;
2212 extern AVCodec ffvhuff_decoder;
2213 extern AVCodec oggvorbis_decoder;
2214 extern AVCodec cyuv_decoder;
2215 extern AVCodec h264_decoder;
2216 extern AVCodec indeo3_decoder;
2217 extern AVCodec vp3_decoder;
2218 extern AVCodec theora_decoder;
2219 extern AVCodec vp5_decoder;
2220 extern AVCodec vp6_decoder;
2221 extern AVCodec vp6f_decoder;
2222 extern AVCodec amr_nb_decoder;
2223 extern AVCodec amr_nb_encoder;
2224 extern AVCodec amr_wb_encoder;
2225 extern AVCodec amr_wb_decoder;
2226 extern AVCodec aac_decoder;
2227 extern AVCodec mpeg4aac_decoder;
2228 extern AVCodec asv1_decoder;
2229 extern AVCodec asv2_decoder;
2230 extern AVCodec vcr1_decoder;
2231 extern AVCodec cljr_decoder;
2232 extern AVCodec ffv1_decoder;
2233 extern AVCodec snow_decoder;
2234 extern AVCodec fourxm_decoder;
2235 extern AVCodec mdec_decoder;
2236 extern AVCodec roq_decoder;
2237 extern AVCodec interplay_video_decoder;
2238 extern AVCodec xan_wc3_decoder;
2239 extern AVCodec rpza_decoder;
2240 extern AVCodec cinepak_decoder;
2241 extern AVCodec msrle_decoder;
2242 extern AVCodec msvideo1_decoder;
2243 extern AVCodec vqa_decoder;
2244 extern AVCodec idcin_decoder;
2245 extern AVCodec eightbps_decoder;
2246 extern AVCodec smc_decoder;
2247 extern AVCodec flic_decoder;
2248 extern AVCodec vmdvideo_decoder;
2249 extern AVCodec vmdaudio_decoder;
2250 extern AVCodec truemotion1_decoder;
2251 extern AVCodec truemotion2_decoder;
2252 extern AVCodec mszh_decoder;
2253 extern AVCodec zlib_decoder;
2254 extern AVCodec ra_144_decoder;
2255 extern AVCodec ra_288_decoder;
2256 extern AVCodec roq_dpcm_decoder;
2257 extern AVCodec interplay_dpcm_decoder;
2258 extern AVCodec xan_dpcm_decoder;
2259 extern AVCodec sol_dpcm_decoder;
2260 extern AVCodec sonic_decoder;
2261 extern AVCodec qtrle_decoder;
2262 extern AVCodec flac_decoder;
2263 extern AVCodec tscc_decoder;
2264 extern AVCodec cscd_decoder;
2265 extern AVCodec nuv_decoder;
2266 extern AVCodec ulti_decoder;
2267 extern AVCodec qdraw_decoder;
2268 extern AVCodec xl_decoder;
2269 extern AVCodec qpeg_decoder;
2270 extern AVCodec shorten_decoder;
2271 extern AVCodec loco_decoder;
2272 extern AVCodec wnv1_decoder;
2273 extern AVCodec aasc_decoder;
2274 extern AVCodec alac_decoder;
2275 extern AVCodec ws_snd1_decoder;
2276 extern AVCodec indeo2_decoder;
2277 extern AVCodec vorbis_decoder;
2278 extern AVCodec fraps_decoder;
2279 extern AVCodec libgsm_encoder;
2280 extern AVCodec libgsm_decoder;
2281 extern AVCodec bmp_decoder;
2282 extern AVCodec mmvideo_decoder;
2283 extern AVCodec zmbv_decoder;
2284 extern AVCodec avs_decoder;
2285 extern AVCodec smacker_decoder;
2286 extern AVCodec smackaud_decoder;
2287 extern AVCodec kmvc_decoder;
2288 extern AVCodec flashsv_decoder;
2289 extern AVCodec cavs_decoder;
2290 extern AVCodec vmnc_decoder;
2291 extern AVCodec wavpack_decoder;
2294 #define PCM_CODEC(id, name) \
2295 extern AVCodec name ## _decoder; \
2296 extern AVCodec name ## _encoder
2298 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2299 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2300 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2301 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2302 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2303 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2304 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2305 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2306 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2307 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2308 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2309 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2310 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2311 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2312 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2313 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2314 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2318 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2319 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2320 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2321 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2322 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2323 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2324 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2325 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2326 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2327 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2328 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2329 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2330 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2331 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2332 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2333 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2334 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2335 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2339 /* dummy raw video codec */
2340 extern AVCodec rawvideo_encoder;
2341 extern AVCodec rawvideo_decoder;
2343 /* the following codecs use external GPL libs */
2344 extern AVCodec ac3_decoder;
2345 extern AVCodec dts_decoder;
2348 extern AVCodec dvdsub_encoder;
2349 extern AVCodec dvdsub_decoder;
2350 extern AVCodec dvbsub_encoder;
2351 extern AVCodec dvbsub_decoder;
2355 struct ReSampleContext;
2356 struct AVResampleContext;
2358 typedef struct ReSampleContext ReSampleContext;
2360 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2361 int output_rate, int input_rate);
2362 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2363 void audio_resample_close(ReSampleContext *s);
2365 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2366 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2367 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2368 void av_resample_close(struct AVResampleContext *c);
2370 /* YUV420 format is assumed ! */
2372 struct ImgReSampleContext;
2374 typedef struct ImgReSampleContext ImgReSampleContext;
2376 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2377 int input_width, int input_height);
2379 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2380 int iwidth, int iheight,
2381 int topBand, int bottomBand,
2382 int leftBand, int rightBand,
2383 int padtop, int padbottom,
2384 int padleft, int padright);
2387 void img_resample(ImgReSampleContext *s,
2388 AVPicture *output, const AVPicture *input);
2390 void img_resample_close(ImgReSampleContext *s);
2393 * Allocate memory for a picture. Call avpicture_free to free it.
2395 * @param picture the picture to be filled in.
2396 * @param pix_fmt the format of the picture.
2397 * @param width the width of the picture.
2398 * @param height the height of the picture.
2399 * @return 0 if successful, -1 if not.
2401 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2403 /* Free a picture previously allocated by avpicture_alloc. */
2404 void avpicture_free(AVPicture *picture);
2406 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2407 int pix_fmt, int width, int height);
2408 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2409 unsigned char *dest, int dest_size);
2410 int avpicture_get_size(int pix_fmt, int width, int height);
2411 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2412 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2413 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2414 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2415 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2417 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2418 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2419 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2420 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2421 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2422 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2424 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2426 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2427 int has_alpha, int *loss_ptr);
2429 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2430 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2431 int img_get_alpha_info(const AVPicture *src,
2432 int pix_fmt, int width, int height);
2434 /* convert among pixel formats */
2435 int img_convert(AVPicture *dst, int dst_pix_fmt,
2436 const AVPicture *src, int pix_fmt,
2437 int width, int height);
2439 /* deinterlace a picture */
2440 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2441 int pix_fmt, int width, int height);
2443 /* external high level API */
2445 extern AVCodec *first_avcodec;
2447 /* returns LIBAVCODEC_VERSION_INT constant */
2448 unsigned avcodec_version(void);
2449 /* returns LIBAVCODEC_BUILD constant */
2450 unsigned avcodec_build(void);
2451 void avcodec_init(void);
2453 void register_avcodec(AVCodec *format);
2454 AVCodec *avcodec_find_encoder(enum CodecID id);
2455 AVCodec *avcodec_find_encoder_by_name(const char *name);
2456 AVCodec *avcodec_find_decoder(enum CodecID id);
2457 AVCodec *avcodec_find_decoder_by_name(const char *name);
2458 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2460 void avcodec_get_context_defaults(AVCodecContext *s);
2461 AVCodecContext *avcodec_alloc_context(void);
2462 void avcodec_get_frame_defaults(AVFrame *pic);
2463 AVFrame *avcodec_alloc_frame(void);
2465 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2466 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2467 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2468 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2469 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2470 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2472 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2473 void avcodec_thread_free(AVCodecContext *s);
2474 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2475 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2476 //FIXME func typedef
2479 * opens / inits the AVCodecContext.
2482 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2485 * Decode an audio frame.
2487 * @param avctx the codec context.
2488 * @param samples output buffer, 16 byte aligned
2489 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2490 * @param buf input buffer, 16 byte aligned
2491 * @param buf_size the input buffer size
2492 * @return 0 if successful, -1 if not.
2495 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2496 int *frame_size_ptr,
2497 uint8_t *buf, int buf_size);
2498 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2499 int *got_picture_ptr,
2500 uint8_t *buf, int buf_size);
2501 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2503 const uint8_t *buf, int buf_size);
2504 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2506 uint8_t *buf, int buf_size);
2507 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2508 const short *samples);
2509 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2510 const AVFrame *pict);
2511 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2512 const AVSubtitle *sub);
2514 int avcodec_close(AVCodecContext *avctx);
2516 void avcodec_register_all(void);
2518 void avcodec_flush_buffers(AVCodecContext *avctx);
2520 void avcodec_default_free_buffers(AVCodecContext *s);
2522 /* misc usefull functions */
2525 * returns a single letter to describe the picture type
2527 char av_get_pict_type_char(int pict_type);
2530 * returns codec bits per sample
2532 int av_get_bits_per_sample(enum CodecID codec_id);
2535 typedef struct AVCodecParserContext {
2537 struct AVCodecParser *parser;
2538 int64_t frame_offset; /* offset of the current frame */
2539 int64_t cur_offset; /* current offset
2540 (incremented by each av_parser_parse()) */
2541 int64_t last_frame_offset; /* offset of the last frame */
2543 int pict_type; /* XXX: put it back in AVCodecContext */
2544 int repeat_pict; /* XXX: put it back in AVCodecContext */
2545 int64_t pts; /* pts of the current frame */
2546 int64_t dts; /* dts of the current frame */
2551 int fetch_timestamp;
2553 #define AV_PARSER_PTS_NB 4
2554 int cur_frame_start_index;
2555 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2556 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2557 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2560 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2561 } AVCodecParserContext;
2563 typedef struct AVCodecParser {
2564 int codec_ids[5]; /* several codec IDs are permitted */
2566 int (*parser_init)(AVCodecParserContext *s);
2567 int (*parser_parse)(AVCodecParserContext *s,
2568 AVCodecContext *avctx,
2569 uint8_t **poutbuf, int *poutbuf_size,
2570 const uint8_t *buf, int buf_size);
2571 void (*parser_close)(AVCodecParserContext *s);
2572 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2573 struct AVCodecParser *next;
2576 extern AVCodecParser *av_first_parser;
2578 void av_register_codec_parser(AVCodecParser *parser);
2579 AVCodecParserContext *av_parser_init(int codec_id);
2580 int av_parser_parse(AVCodecParserContext *s,
2581 AVCodecContext *avctx,
2582 uint8_t **poutbuf, int *poutbuf_size,
2583 const uint8_t *buf, int buf_size,
2584 int64_t pts, int64_t dts);
2585 int av_parser_change(AVCodecParserContext *s,
2586 AVCodecContext *avctx,
2587 uint8_t **poutbuf, int *poutbuf_size,
2588 const uint8_t *buf, int buf_size, int keyframe);
2589 void av_parser_close(AVCodecParserContext *s);
2591 extern AVCodecParser mpegvideo_parser;
2592 extern AVCodecParser mpeg4video_parser;
2593 extern AVCodecParser cavsvideo_parser;
2594 extern AVCodecParser h261_parser;
2595 extern AVCodecParser h263_parser;
2596 extern AVCodecParser h264_parser;
2597 extern AVCodecParser mjpeg_parser;
2598 extern AVCodecParser pnm_parser;
2599 extern AVCodecParser mpegaudio_parser;
2600 extern AVCodecParser ac3_parser;
2601 extern AVCodecParser dvdsub_parser;
2602 extern AVCodecParser dvbsub_parser;
2603 extern AVCodecParser aac_parser;
2606 typedef struct AVBitStreamFilterContext {
2608 struct AVBitStreamFilter *filter;
2609 AVCodecParserContext *parser;
2610 struct AVBitStreamFilterContext *next;
2611 } AVBitStreamFilterContext;
2614 typedef struct AVBitStreamFilter {
2617 int (*filter)(AVBitStreamFilterContext *bsfc,
2618 AVCodecContext *avctx, const char *args,
2619 uint8_t **poutbuf, int *poutbuf_size,
2620 const uint8_t *buf, int buf_size, int keyframe);
2621 struct AVBitStreamFilter *next;
2622 } AVBitStreamFilter;
2624 extern AVBitStreamFilter *av_first_bitstream_filter;
2626 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2627 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2628 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2629 AVCodecContext *avctx, const char *args,
2630 uint8_t **poutbuf, int *poutbuf_size,
2631 const uint8_t *buf, int buf_size, int keyframe);
2632 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2634 extern AVBitStreamFilter dump_extradata_bsf;
2635 extern AVBitStreamFilter remove_extradata_bsf;
2636 extern AVBitStreamFilter noise_bsf;
2640 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2641 /* for static data only */
2642 /* call av_free_static to release all staticaly allocated tables */
2643 void av_free_static(void);
2644 void *av_mallocz_static(unsigned int size);
2645 void *av_realloc_static(void *ptr, unsigned int size);
2647 void img_copy(AVPicture *dst, const AVPicture *src,
2648 int pix_fmt, int width, int height);
2650 int img_crop(AVPicture *dst, const AVPicture *src,
2651 int pix_fmt, int top_band, int left_band);
2653 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2654 int padtop, int padbottom, int padleft, int padright, int *color);
2657 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2658 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2659 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2660 (((uint8_t*)(x))[1] << 16) | \
2661 (((uint8_t*)(x))[2] << 8) | \
2663 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2664 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2665 (((uint8_t*)(x))[2] << 16) | \
2666 (((uint8_t*)(x))[1] << 8) | \
2670 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2676 #endif /* AVCODEC_H */