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)+(25<<8)+0)
41 #define LIBAVCODEC_VERSION 51.25.0
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,
153 /* various pcm "codecs" */
154 CODEC_ID_PCM_S16LE= 0x10000,
170 CODEC_ID_PCM_S24DAUD,
172 /* various adpcm codecs */
173 CODEC_ID_ADPCM_IMA_QT= 0x11000,
174 CODEC_ID_ADPCM_IMA_WAV,
175 CODEC_ID_ADPCM_IMA_DK3,
176 CODEC_ID_ADPCM_IMA_DK4,
177 CODEC_ID_ADPCM_IMA_WS,
178 CODEC_ID_ADPCM_IMA_SMJPEG,
187 CODEC_ID_ADPCM_YAMAHA,
188 CODEC_ID_ADPCM_SBPRO_4,
189 CODEC_ID_ADPCM_SBPRO_3,
190 CODEC_ID_ADPCM_SBPRO_2,
193 CODEC_ID_AMR_NB= 0x12000,
196 /* RealAudio codecs*/
197 CODEC_ID_RA_144= 0x13000,
200 /* various DPCM codecs */
201 CODEC_ID_ROQ_DPCM= 0x14000,
202 CODEC_ID_INTERPLAY_DPCM,
206 CODEC_ID_MP2= 0x15000,
207 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
209 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
228 CODEC_ID_WESTWOOD_SND1,
237 CODEC_ID_DSICINAUDIO,
240 /* subtitle codecs */
241 CODEC_ID_DVD_SUBTITLE= 0x17000,
242 CODEC_ID_DVB_SUBTITLE,
244 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
245 stream (only used by libavformat) */
248 /* CODEC_ID_MP3LAME is absolete */
249 #define CODEC_ID_MP3LAME CODEC_ID_MP3
252 CODEC_TYPE_UNKNOWN = -1,
259 /* currently unused, may be used if 24/32 bits samples ever supported */
260 /* all in native endian */
262 SAMPLE_FMT_NONE = -1,
263 SAMPLE_FMT_U8, ///< unsigned 8 bits
264 SAMPLE_FMT_S16, ///< signed 16 bits
265 SAMPLE_FMT_S24, ///< signed 24 bits
266 SAMPLE_FMT_S32, ///< signed 32 bits
267 SAMPLE_FMT_FLT, ///< float
271 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
274 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
275 * this is mainly needed because some optimized bitstream readers read
276 * 32 or 64 bit at once and could read over the end<br>
277 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
278 * MPEG bitstreams could cause overread and segfault
280 #define FF_INPUT_BUFFER_PADDING_SIZE 8
283 * minimum encoding buffer size.
284 * used to avoid some checks during header writing
286 #define FF_MIN_BUFFER_SIZE 16384
288 /* motion estimation type, EPZS by default */
302 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
303 AVDISCARD_NONE =-16, ///< discard nothing
304 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
305 AVDISCARD_NONREF = 8, ///< discard all non reference
306 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
307 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
308 AVDISCARD_ALL = 48, ///< discard all
311 typedef struct RcOverride{
314 int qscale; // if this is 0 then quality_factor will be used instead
315 float quality_factor;
318 #define FF_MAX_B_FRAMES 16
321 these flags can be passed in AVCodecContext.flags before initing
322 Note: not everything is supported yet.
325 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
326 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
327 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
328 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
329 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
330 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
331 /* parent program gurantees that the input for b-frame containing streams is not written to
332 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
333 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
334 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
335 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
336 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
337 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
338 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
339 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
340 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
341 of only at frame boundaries */
342 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
343 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
344 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
345 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
346 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
347 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
348 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
349 /* Fx : Flag for h263+ extra options */
350 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
351 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
352 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
353 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
354 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
355 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
356 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
357 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
358 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
359 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
360 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
361 #define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
362 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
363 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
364 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
365 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
366 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
367 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
368 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
369 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
370 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
371 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
372 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
373 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
374 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
375 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format
377 /* Unsupported options :
378 * Syntax Arithmetic coding (SAC)
379 * Reference Picture Selection
380 * Independant Segment Decoding */
382 /* codec capabilities */
384 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
386 * Codec uses get_buffer() for allocating buffers.
387 * direct rendering method 1
389 #define CODEC_CAP_DR1 0x0002
390 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
392 #define CODEC_CAP_PARSE_ONLY 0x0004
393 #define CODEC_CAP_TRUNCATED 0x0008
394 /* codec can export data for HW decoding (XvMC) */
395 #define CODEC_CAP_HWACCEL 0x0010
397 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
398 * if this is not set, the codec is guranteed to never be feeded with NULL data
400 #define CODEC_CAP_DELAY 0x0020
402 * Codec can be fed a final frame with a smaller size.
403 * This can be used to prevent truncation of the last audio samples.
405 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
407 //the following defines may change, don't expect compatibility if you use them
408 #define MB_TYPE_INTRA4x4 0x0001
409 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
410 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
411 #define MB_TYPE_16x16 0x0008
412 #define MB_TYPE_16x8 0x0010
413 #define MB_TYPE_8x16 0x0020
414 #define MB_TYPE_8x8 0x0040
415 #define MB_TYPE_INTERLACED 0x0080
416 #define MB_TYPE_DIRECT2 0x0100 //FIXME
417 #define MB_TYPE_ACPRED 0x0200
418 #define MB_TYPE_GMC 0x0400
419 #define MB_TYPE_SKIP 0x0800
420 #define MB_TYPE_P0L0 0x1000
421 #define MB_TYPE_P1L0 0x2000
422 #define MB_TYPE_P0L1 0x4000
423 #define MB_TYPE_P1L1 0x8000
424 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
425 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
426 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
427 #define MB_TYPE_QUANT 0x00010000
428 #define MB_TYPE_CBP 0x00020000
429 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
433 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
435 typedef struct AVPanScan{
438 * - encoding: set by user.
439 * - decoding: set by lavc
444 * width and height in 1/16 pel
445 * - encoding: set by user.
446 * - decoding: set by lavc
452 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
453 * - encoding: set by user.
454 * - decoding: set by lavc
456 int16_t position[3][2];
459 #define FF_COMMON_FRAME \
461 * pointer to the picture planes.\
462 * this might be different from the first allocated byte\
469 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
470 * this isn't used by lavc unless the default get/release_buffer() is used\
476 * 1 -> keyframe, 0-> not\
477 * - encoding: set by lavc\
478 * - decoding: set by lavc\
483 * picture type of the frame, see ?_TYPE below.\
484 * - encoding: set by lavc for coded_picture (and set by user for input)\
485 * - decoding: set by lavc\
490 * presentation timestamp in time_base units (time when frame should be shown to user)\
491 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
492 * - encoding: MUST be set by user\
493 * - decoding: set by lavc\
498 * picture number in bitstream order.\
499 * - encoding: set by\
500 * - decoding: set by lavc\
502 int coded_picture_number;\
504 * picture number in display order.\
505 * - encoding: set by\
506 * - decoding: set by lavc\
508 int display_picture_number;\
511 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
512 * - encoding: set by lavc for coded_picture (and set by user for input)\
513 * - decoding: set by lavc\
518 * buffer age (1->was last buffer and dint change, 2->..., ...).\
519 * set to INT_MAX if the buffer has not been used yet \
520 * - encoding: unused\
521 * - decoding: MUST be set by get_buffer()\
526 * is this picture used as reference\
527 * - encoding: unused\
528 * - decoding: set by lavc (before get_buffer() call))\
534 * - encoding: unused\
535 * - decoding: set by lavc\
537 int8_t *qscale_table;\
540 * - encoding: unused\
541 * - decoding: set by lavc\
546 * mbskip_table[mb]>=1 if MB didnt change\
547 * stride= mb_width = (width+15)>>4\
548 * - encoding: unused\
549 * - decoding: set by lavc\
551 uint8_t *mbskip_table;\
554 * Motion vector table.\
557 * int mv_sample_log2= 4 - motion_subsample_log2;\
558 * int mb_width= (width+15)>>4;\
559 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
560 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
562 * - encoding: set by user\
563 * - decoding: set by lavc\
565 int16_t (*motion_val[2])[2];\
568 * Macroblock type table\
569 * mb_type_base + mb_width + 2\
570 * - encoding: set by user\
571 * - decoding: set by lavc\
576 * log2 of the size of the block which a single vector in motion_val represents: \
577 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
578 * - encoding: unused\
579 * - decoding: set by lavc\
581 uint8_t motion_subsample_log2;\
584 * for some private data of the user\
585 * - encoding: unused\
586 * - decoding: set by user\
592 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
593 * - decoding: unused\
598 * type of the buffer (to keep track of who has to dealloc data[*])\
599 * - encoding: set by the one who allocs it\
600 * - decoding: set by the one who allocs it\
601 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
606 * when decoding, this signal how much the picture must be delayed.\
607 * extra_delay = repeat_pict / (2*fps)\
608 * - encoding: unused\
609 * - decoding: set by lavc\
619 * The content of the picture is interlaced.\
620 * - encoding: set by user\
621 * - decoding: set by lavc (default 0)\
623 int interlaced_frame;\
626 * if the content is interlaced, is top field displayed first.\
627 * - encoding: set by user\
628 * - decoding: set by lavc\
630 int top_field_first;\
634 * - encoding: set by user\
635 * - decoding: set by lavc\
637 AVPanScan *pan_scan;\
640 * tell user application that palette has changed from previous frame.\
641 * - encoding: ??? (no palette-enabled encoder yet)\
642 * - decoding: set by lavc (default 0)\
644 int palette_has_changed;\
647 * Codec suggestion on buffer type if != 0\
648 * - encoding: unused\
649 * - decoding: set by lavc (before get_buffer() call))\
655 * - encoding: unused\
656 * - decoding: set by lavc\
661 * Motion referece frame index\
662 * - encoding: set by user\
663 * - decoding: set by lavc\
665 int8_t *ref_index[2];
667 #define FF_QSCALE_TYPE_MPEG1 0
668 #define FF_QSCALE_TYPE_MPEG2 1
669 #define FF_QSCALE_TYPE_H264 2
671 #define FF_BUFFER_TYPE_INTERNAL 1
672 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
673 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
674 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
677 #define FF_I_TYPE 1 // Intra
678 #define FF_P_TYPE 2 // Predicted
679 #define FF_B_TYPE 3 // Bi-dir predicted
680 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
684 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
685 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
686 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
687 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
692 typedef struct AVFrame {
696 #define DEFAULT_FRAME_RATE_BASE 1001000
699 * main external api structure.
701 typedef struct AVCodecContext {
703 * Info on struct for av_log
704 * - set by avcodec_alloc_context
708 * the average bitrate.
709 * - encoding: set by user. unused for constant quantizer encoding
710 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
715 * number of bits the bitstream is allowed to diverge from the reference.
716 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
717 * - encoding: set by user. unused for constant quantizer encoding
720 int bit_rate_tolerance;
724 * - encoding: set by user.
725 * - decoding: set by user.
730 * some codecs needs additionnal format info. It is stored here
731 * - encoding: set by user.
732 * - decoding: set by lavc. (FIXME is this ok?)
737 * motion estimation algorithm used for video coding.
738 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
739 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
740 * - encoding: MUST be set by user.
746 * some codecs need / can use extra-data like huffman tables.
747 * mjpeg: huffman tables
748 * rv10: additional flags
749 * mpeg4: global headers (they can be in the bitstream or here)
750 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
751 * then extradata_size to avoid prolems if its read with the bitstream reader
752 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
753 * - encoding: set/allocated/freed by lavc.
754 * - decoding: set/allocated/freed by user.
760 * this is the fundamental unit of time (in seconds) in terms
761 * of which frame timestamps are represented. for fixed-fps content,
762 * timebase should be 1/framerate and timestamp increments should be
764 * - encoding: MUST be set by user
765 * - decoding: set by lavc.
767 AVRational time_base;
771 * picture width / height.
772 * - encoding: MUST be set by user.
773 * - decoding: set by lavc.
774 * Note, for compatibility its possible to set this instead of
775 * coded_width/height before decoding
779 #define FF_ASPECT_EXTENDED 15
782 * the number of pictures in a group of pitures, or 0 for intra_only.
783 * - encoding: set by user.
789 * pixel format, see PIX_FMT_xxx.
790 * - encoding: set by user.
791 * - decoding: set by lavc.
793 enum PixelFormat pix_fmt;
796 * Frame rate emulation. If not zero lower layer (i.e. format handler)
797 * has to read frames at native frame rate.
798 * - encoding: set by user.
799 * - decoding: unused.
804 * if non NULL, 'draw_horiz_band' is called by the libavcodec
805 * decoder to draw an horizontal band. It improve cache usage. Not
806 * all codecs can do that. You must check the codec capabilities
809 * - decoding: set by user.
810 * @param height the height of the slice
811 * @param y the y position of the slice
812 * @param type 1->top field, 2->bottom field, 3->frame
813 * @param offset offset into the AVFrame.data from which the slice should be read
815 void (*draw_horiz_band)(struct AVCodecContext *s,
816 const AVFrame *src, int offset[4],
817 int y, int type, int height);
820 int sample_rate; ///< samples per sec
824 * audio sample format.
825 * - encoding: set by user.
826 * - decoding: set by lavc.
828 enum SampleFormat sample_fmt; ///< sample format, currenly unused
830 /* the following data should not be initialized */
832 * samples per packet. initialized when calling 'init'
835 int frame_number; ///< audio or video frame number
836 int real_pict_num; ///< returns the real picture number of previous encoded frame
839 * number of frames the decoded output will be delayed relative to
841 * - encoding: set by lavc.
846 /* - encoding parameters */
847 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
848 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
852 * - encoding: set by user.
859 * - encoding: set by user.
865 * maximum quantizer difference etween frames.
866 * - encoding: set by user.
872 * maximum number of b frames between non b frames.
873 * note: the output will be delayed by max_b_frames+1 relative to the input
874 * - encoding: set by user.
880 * qscale factor between ip and b frames.
881 * - encoding: set by user.
884 float b_quant_factor;
886 /** obsolete FIXME remove */
888 #define FF_RC_STRATEGY_XVID 1
890 int b_frame_strategy;
894 * deprecated in favor of skip_idct and skip_frame
896 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
900 struct AVCodec *codec;
904 /* unused, FIXME remove*/
907 int rtp_payload_size; /* The size of the RTP payload: the coder will */
908 /* do it's best to deliver a chunk with size */
909 /* below rtp_payload_size, the chunk will start */
910 /* with a start code on some codecs like H.263 */
911 /* This doesn't take account of any particular */
912 /* headers inside the transmited RTP payload */
915 /* The RTP callback: This function is called */
916 /* every time the encoder has a packet to send */
917 /* Depends on the encoder if the data starts */
918 /* with a Start Code (it should) H.263 does. */
919 /* mb_nb contains the number of macroblocks */
920 /* encoded in the RTP payload */
921 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
923 /* statistics, used for 2-pass encoding */
934 * number of bits used for the previously encoded frame.
935 * - encoding: set by lavc
941 * private data of the user, can be used to carry app specific stuff.
942 * - encoding: set by user
943 * - decoding: set by user
948 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
949 enum CodecID codec_id; /* see CODEC_ID_xxx */
952 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
953 * this is used to workaround some encoder bugs
954 * - encoding: set by user, if not then the default based on codec_id will be used
955 * - decoding: set by user, will be converted to upper case by lavc during init
957 unsigned int codec_tag;
960 * workaround bugs in encoders which sometimes cannot be detected automatically.
961 * - encoding: set by user
962 * - decoding: set by user
965 #define FF_BUG_AUTODETECT 1 ///< autodetection
966 #define FF_BUG_OLD_MSMPEG4 2
967 #define FF_BUG_XVID_ILACE 4
968 #define FF_BUG_UMP4 8
969 #define FF_BUG_NO_PADDING 16
970 #define FF_BUG_AMV 32
971 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
972 #define FF_BUG_QPEL_CHROMA 64
973 #define FF_BUG_STD_QPEL 128
974 #define FF_BUG_QPEL_CHROMA2 256
975 #define FF_BUG_DIRECT_BLOCKSIZE 512
976 #define FF_BUG_EDGE 1024
977 #define FF_BUG_HPEL_CHROMA 2048
978 #define FF_BUG_DC_CLIP 4096
979 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
980 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
983 * luma single coeff elimination threshold.
984 * - encoding: set by user
987 int luma_elim_threshold;
990 * chroma single coeff elimination threshold.
991 * - encoding: set by user
994 int chroma_elim_threshold;
997 * strictly follow the std (MPEG4, ...).
998 * - encoding: set by user
1001 int strict_std_compliance;
1002 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
1003 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
1004 #define FF_COMPLIANCE_NORMAL 0
1005 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
1006 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1009 * qscale offset between ip and b frames.
1010 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1011 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1012 * - encoding: set by user.
1013 * - decoding: unused
1015 float b_quant_offset;
1018 * error resilience higher values will detect more errors but may missdetect
1019 * some more or less valid parts as errors.
1020 * - encoding: unused
1021 * - decoding: set by user
1023 int error_resilience;
1024 #define FF_ER_CAREFUL 1
1025 #define FF_ER_COMPLIANT 2
1026 #define FF_ER_AGGRESSIVE 3
1027 #define FF_ER_VERY_AGGRESSIVE 4
1030 * called at the beginning of each frame to get a buffer for it.
1031 * if pic.reference is set then the frame will be read later by lavc
1032 * avcodec_align_dimensions() should be used to find the required width and
1033 * height, as they normally need to be rounded up to the next multiple of 16
1034 * - encoding: unused
1035 * - decoding: set by lavc, user can override
1037 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1040 * called to release buffers which where allocated with get_buffer.
1041 * a released buffer can be reused in get_buffer()
1042 * pic.data[*] must be set to NULL
1043 * - encoding: unused
1044 * - decoding: set by lavc, user can override
1046 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1049 * if 1 the stream has a 1 frame delay during decoding.
1050 * - encoding: set by lavc
1051 * - decoding: set by lavc
1056 * number of bytes per packet if constant and known or 0
1057 * used by some WAV based audio codecs
1061 int parse_only; /* - decoding only: if true, only parsing is done
1062 (function avcodec_parse_frame()). The frame
1063 data is returned. Only MPEG codecs support this now. */
1066 * 0-> h263 quant 1-> mpeg quant.
1067 * - encoding: set by user.
1068 * - decoding: unused
1073 * pass1 encoding statistics output buffer.
1074 * - encoding: set by lavc
1075 * - decoding: unused
1080 * pass2 encoding statistics input buffer.
1081 * concatenated stuff from stats_out of pass1 should be placed here
1082 * - encoding: allocated/set/freed by user
1083 * - decoding: unused
1088 * ratecontrol qmin qmax limiting method.
1089 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1090 * - encoding: set by user.
1091 * - decoding: unused
1099 * ratecontrol override, see RcOverride.
1100 * - encoding: allocated/set/freed by user.
1101 * - decoding: unused
1103 RcOverride *rc_override;
1104 int rc_override_count;
1107 * rate control equation.
1108 * - encoding: set by user
1109 * - decoding: unused
1115 * - encoding: set by user.
1116 * - decoding: unused
1122 * - encoding: set by user.
1123 * - decoding: unused
1128 * decoder bitstream buffer size.
1129 * - encoding: set by user.
1130 * - decoding: unused
1133 float rc_buffer_aggressivity;
1136 * qscale factor between p and i frames.
1137 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1138 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1139 * - encoding: set by user.
1140 * - decoding: unused
1142 float i_quant_factor;
1145 * qscale offset between p and i frames.
1146 * - encoding: set by user.
1147 * - decoding: unused
1149 float i_quant_offset;
1152 * initial complexity for pass1 ratecontrol.
1153 * - encoding: set by user.
1154 * - decoding: unused
1156 float rc_initial_cplx;
1159 * dct algorithm, see FF_DCT_* below.
1160 * - encoding: set by user
1161 * - decoding: unused
1164 #define FF_DCT_AUTO 0
1165 #define FF_DCT_FASTINT 1
1166 #define FF_DCT_INT 2
1167 #define FF_DCT_MMX 3
1168 #define FF_DCT_MLIB 4
1169 #define FF_DCT_ALTIVEC 5
1170 #define FF_DCT_FAAN 6
1173 * luminance masking (0-> disabled).
1174 * - encoding: set by user
1175 * - decoding: unused
1180 * temporary complexity masking (0-> disabled).
1181 * - encoding: set by user
1182 * - decoding: unused
1184 float temporal_cplx_masking;
1187 * spatial complexity masking (0-> disabled).
1188 * - encoding: set by user
1189 * - decoding: unused
1191 float spatial_cplx_masking;
1194 * p block masking (0-> disabled).
1195 * - encoding: set by user
1196 * - decoding: unused
1201 * darkness masking (0-> disabled).
1202 * - encoding: set by user
1203 * - decoding: unused
1208 /* for binary compatibility */
1212 * idct algorithm, see FF_IDCT_* below.
1213 * - encoding: set by user
1214 * - decoding: set by user
1217 #define FF_IDCT_AUTO 0
1218 #define FF_IDCT_INT 1
1219 #define FF_IDCT_SIMPLE 2
1220 #define FF_IDCT_SIMPLEMMX 3
1221 #define FF_IDCT_LIBMPEG2MMX 4
1222 #define FF_IDCT_PS2 5
1223 #define FF_IDCT_MLIB 6
1224 #define FF_IDCT_ARM 7
1225 #define FF_IDCT_ALTIVEC 8
1226 #define FF_IDCT_SH4 9
1227 #define FF_IDCT_SIMPLEARM 10
1228 #define FF_IDCT_H264 11
1229 #define FF_IDCT_VP3 12
1230 #define FF_IDCT_IPP 13
1231 #define FF_IDCT_XVIDMMX 14
1232 #define FF_IDCT_CAVS 15
1233 #define FF_IDCT_SIMPLEARMV5TE 16
1237 * - encoding: set by lavc
1238 * - decoding: set by user (or 0)
1242 * slice offsets in the frame in bytes.
1243 * - encoding: set/allocated by lavc
1244 * - decoding: set/allocated by user (or NULL)
1249 * error concealment flags.
1250 * - encoding: unused
1251 * - decoding: set by user
1253 int error_concealment;
1254 #define FF_EC_GUESS_MVS 1
1255 #define FF_EC_DEBLOCK 2
1258 * dsp_mask could be add used to disable unwanted CPU features
1259 * CPU features (i.e. MMX, SSE. ...)
1261 * with FORCE flag you may instead enable given CPU features
1262 * (Dangerous: usable in case of misdetection, improper usage however will
1263 * result into program crash)
1266 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1267 /* lower 16 bits - CPU features */
1269 #define FF_MM_MMX 0x0001 /* standard MMX */
1270 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1271 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1272 #define FF_MM_SSE 0x0008 /* SSE functions */
1273 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1274 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1275 #endif /* HAVE_MMX */
1277 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1278 #endif /* HAVE_IWMMXT */
1281 * bits per sample/pixel from the demuxer (needed for huffyuv).
1282 * - encoding: set by lavc
1283 * - decoding: set by user
1285 int bits_per_sample;
1288 * prediction method (needed for huffyuv).
1289 * - encoding: set by user
1290 * - decoding: unused
1292 int prediction_method;
1293 #define FF_PRED_LEFT 0
1294 #define FF_PRED_PLANE 1
1295 #define FF_PRED_MEDIAN 2
1298 * sample aspect ratio (0 if unknown).
1299 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1300 * - encoding: set by user.
1301 * - decoding: set by lavc.
1303 AVRational sample_aspect_ratio;
1306 * the picture in the bitstream.
1307 * - encoding: set by lavc
1308 * - decoding: set by lavc
1310 AVFrame *coded_frame;
1314 * - encoding: set by user.
1315 * - decoding: set by user.
1318 #define FF_DEBUG_PICT_INFO 1
1319 #define FF_DEBUG_RC 2
1320 #define FF_DEBUG_BITSTREAM 4
1321 #define FF_DEBUG_MB_TYPE 8
1322 #define FF_DEBUG_QP 16
1323 #define FF_DEBUG_MV 32
1324 #define FF_DEBUG_DCT_COEFF 0x00000040
1325 #define FF_DEBUG_SKIP 0x00000080
1326 #define FF_DEBUG_STARTCODE 0x00000100
1327 #define FF_DEBUG_PTS 0x00000200
1328 #define FF_DEBUG_ER 0x00000400
1329 #define FF_DEBUG_MMCO 0x00000800
1330 #define FF_DEBUG_BUGS 0x00001000
1331 #define FF_DEBUG_VIS_QP 0x00002000
1332 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1336 * - encoding: set by user.
1337 * - decoding: set by user.
1340 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1341 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1342 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1346 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1347 * - decoding: unused
1352 * minimum MB quantizer.
1353 * - encoding: unused
1354 * - decoding: unused
1359 * maximum MB quantizer.
1360 * - encoding: unused
1361 * - decoding: unused
1366 * motion estimation compare function.
1367 * - encoding: set by user.
1368 * - decoding: unused
1372 * subpixel motion estimation compare function.
1373 * - encoding: set by user.
1374 * - decoding: unused
1378 * macroblock compare function (not supported yet).
1379 * - encoding: set by user.
1380 * - decoding: unused
1384 * interlaced dct compare function
1385 * - encoding: set by user.
1386 * - decoding: unused
1389 #define FF_CMP_SAD 0
1390 #define FF_CMP_SSE 1
1391 #define FF_CMP_SATD 2
1392 #define FF_CMP_DCT 3
1393 #define FF_CMP_PSNR 4
1394 #define FF_CMP_BIT 5
1396 #define FF_CMP_ZERO 7
1397 #define FF_CMP_VSAD 8
1398 #define FF_CMP_VSSE 9
1399 #define FF_CMP_NSSE 10
1400 #define FF_CMP_W53 11
1401 #define FF_CMP_W97 12
1402 #define FF_CMP_DCTMAX 13
1403 #define FF_CMP_DCT264 14
1404 #define FF_CMP_CHROMA 256
1407 * ME diamond size & shape.
1408 * - encoding: set by user.
1409 * - decoding: unused
1414 * amount of previous MV predictors (2a+1 x 2a+1 square).
1415 * - encoding: set by user.
1416 * - decoding: unused
1418 int last_predictor_count;
1421 * pre pass for motion estimation.
1422 * - encoding: set by user.
1423 * - decoding: unused
1428 * motion estimation pre pass compare function.
1429 * - encoding: set by user.
1430 * - decoding: unused
1435 * ME pre pass diamond size & shape.
1436 * - encoding: set by user.
1437 * - decoding: unused
1442 * subpel ME quality.
1443 * - encoding: set by user.
1444 * - decoding: unused
1446 int me_subpel_quality;
1449 * callback to negotiate the pixelFormat.
1450 * @param fmt is the list of formats which are supported by the codec,
1451 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1452 * the first is allways the native one
1453 * @return the choosen format
1454 * - encoding: unused
1455 * - decoding: set by user, if not set then the native format will always be choosen
1457 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1460 * DTG active format information (additionnal aspect ratio
1461 * information only used in DVB MPEG2 transport streams). 0 if
1464 * - encoding: unused.
1465 * - decoding: set by decoder
1467 int dtg_active_format;
1468 #define FF_DTG_AFD_SAME 8
1469 #define FF_DTG_AFD_4_3 9
1470 #define FF_DTG_AFD_16_9 10
1471 #define FF_DTG_AFD_14_9 11
1472 #define FF_DTG_AFD_4_3_SP_14_9 13
1473 #define FF_DTG_AFD_16_9_SP_14_9 14
1474 #define FF_DTG_AFD_SP_4_3 15
1477 * Maximum motion estimation search range in subpel units.
1478 * if 0 then no limit
1480 * - encoding: set by user.
1481 * - decoding: unused.
1486 * intra quantizer bias.
1487 * - encoding: set by user.
1488 * - decoding: unused
1490 int intra_quant_bias;
1491 #define FF_DEFAULT_QUANT_BIAS 999999
1494 * inter quantizer bias.
1495 * - encoding: set by user.
1496 * - decoding: unused
1498 int inter_quant_bias;
1502 * - encoding: unused.
1503 * - decoding: which clrtable should be used for 8bit RGB images
1504 * table have to be stored somewhere FIXME
1509 * internal_buffer count.
1510 * Don't touch, used by lavc default_get_buffer()
1512 int internal_buffer_count;
1516 * Don't touch, used by lavc default_get_buffer()
1518 void *internal_buffer;
1520 #define FF_LAMBDA_SHIFT 7
1521 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1522 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1523 #define FF_LAMBDA_MAX (256*128-1)
1525 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1527 * global quality for codecs which cannot change it per frame.
1528 * this should be proportional to MPEG1/2/4 qscale.
1529 * - encoding: set by user.
1530 * - decoding: unused
1534 #define FF_CODER_TYPE_VLC 0
1535 #define FF_CODER_TYPE_AC 1
1538 * - encoding: set by user.
1539 * - decoding: unused
1545 * - encoding: set by user.
1546 * - decoding: unused
1552 * - encoding: unused
1553 * - decoding: set by user.
1555 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1560 * - encoding: unused
1561 * - decoding: set by user.
1564 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1565 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1566 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1569 * XVideo Motion Acceleration
1570 * - encoding: forbidden
1571 * - decoding: set by decoder
1573 int xvmc_acceleration;
1576 * macroblock decision mode
1577 * - encoding: set by user.
1578 * - decoding: unused
1581 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1582 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1583 #define FF_MB_DECISION_RD 2 ///< rate distoration
1586 * custom intra quantization matrix
1587 * - encoding: set by user, can be NULL
1588 * - decoding: set by lavc
1590 uint16_t *intra_matrix;
1593 * custom inter quantization matrix
1594 * - encoding: set by user, can be NULL
1595 * - decoding: set by lavc
1597 uint16_t *inter_matrix;
1600 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1601 * this is used to workaround some encoder bugs
1602 * - encoding: unused
1603 * - decoding: set by user, will be converted to upper case by lavc during init
1605 unsigned int stream_codec_tag;
1608 * scene change detection threshold.
1609 * 0 is default, larger means fewer detected scene changes
1610 * - encoding: set by user.
1611 * - decoding: unused
1613 int scenechange_threshold;
1616 * minimum lagrange multipler
1617 * - encoding: set by user.
1618 * - decoding: unused
1623 * maximum lagrange multipler
1624 * - encoding: set by user.
1625 * - decoding: unused
1630 * Palette control structure
1631 * - encoding: ??? (no palette-enabled encoder yet)
1632 * - decoding: set by user.
1634 struct AVPaletteControl *palctrl;
1637 * noise reduction strength
1638 * - encoding: set by user.
1639 * - decoding: unused
1641 int noise_reduction;
1644 * called at the beginning of a frame to get cr buffer for it.
1645 * buffer type (size, hints) must be the same. lavc won't check it.
1646 * lavc will pass previous buffer in pic, function should return
1647 * same buffer or new buffer with old frame "painted" into it.
1648 * if pic.data[0] == NULL must behave like get_buffer().
1649 * - encoding: unused
1650 * - decoding: set by lavc, user can override
1652 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1655 * number of bits which should be loaded into the rc buffer before decoding starts
1656 * - encoding: set by user.
1657 * - decoding: unused
1659 int rc_initial_buffer_occupancy;
1663 * - encoding: set by user.
1664 * - decoding: unused
1666 int inter_threshold;
1670 * - encoding: set by user.
1671 * - decoding: set by user.
1676 * simulates errors in the bitstream to test error concealment.
1677 * - encoding: set by user.
1678 * - decoding: unused.
1683 * MP3 antialias algorithm, see FF_AA_* below.
1684 * - encoding: unused
1685 * - decoding: set by user
1688 #define FF_AA_AUTO 0
1689 #define FF_AA_FASTINT 1 //not implemented yet
1691 #define FF_AA_FLOAT 3
1693 * Quantizer noise shaping.
1694 * - encoding: set by user
1695 * - decoding: unused
1697 int quantizer_noise_shaping;
1701 * is used to decide how many independant tasks should be passed to execute()
1702 * - encoding: set by user
1703 * - decoding: set by user
1708 * the codec may call this to execute several independant things. it will return only after
1709 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1710 * default implementation will execute the parts serially
1711 * @param count the number of things to execute
1712 * - encoding: set by lavc, user can override
1713 * - decoding: set by lavc, user can override
1715 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1719 * can be used by execute() to store some per AVCodecContext stuff.
1720 * - encoding: set by execute()
1721 * - decoding: set by execute()
1723 void *thread_opaque;
1726 * Motion estimation threshold. under which no motion estimation is
1727 * performed, but instead the user specified motion vectors are used
1729 * - encoding: set by user
1730 * - decoding: unused
1735 * Macroblock threshold. under which the user specified macroblock types will be used
1736 * - encoding: set by user
1737 * - decoding: unused
1742 * precision of the intra dc coefficient - 8.
1743 * - encoding: set by user
1744 * - decoding: unused
1746 int intra_dc_precision;
1749 * noise vs. sse weight for the nsse comparsion function.
1750 * - encoding: set by user
1751 * - decoding: unused
1756 * number of macroblock rows at the top which are skipped.
1757 * - encoding: unused
1758 * - decoding: set by user
1763 * number of macroblock rows at the bottom which are skipped.
1764 * - encoding: unused
1765 * - decoding: set by user
1771 * - encoding: set by user
1772 * - decoding: set by lavc
1775 #define FF_PROFILE_UNKNOWN -99
1779 * - encoding: set by user
1780 * - decoding: set by lavc
1783 #define FF_LEVEL_UNKNOWN -99
1786 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1787 * - encoding: unused
1788 * - decoding: set by user
1793 * bitsream width / height. may be different from width/height if lowres
1794 * or other things are used
1795 * - encoding: unused
1796 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1798 int coded_width, coded_height;
1801 * frame skip threshold
1802 * - encoding: set by user
1803 * - decoding: unused
1805 int frame_skip_threshold;
1809 * - encoding: set by user
1810 * - decoding: unused
1812 int frame_skip_factor;
1815 * frame skip exponent
1816 * - encoding: set by user
1817 * - decoding: unused
1822 * frame skip comparission function
1823 * - encoding: set by user.
1824 * - decoding: unused
1829 * border processing masking. raises the quantizer for mbs on the borders
1831 * - encoding: set by user
1832 * - decoding: unused
1834 float border_masking;
1837 * minimum MB lagrange multipler.
1838 * - encoding: set by user.
1839 * - decoding: unused
1844 * maximum MB lagrange multipler.
1845 * - encoding: set by user.
1846 * - decoding: unused
1852 * - encoding: set by user.
1853 * - decoding: unused
1855 int me_penalty_compensation;
1859 * - encoding: unused
1860 * - decoding: set by user.
1862 enum AVDiscard skip_loop_filter;
1866 * - encoding: unused
1867 * - decoding: set by user.
1869 enum AVDiscard skip_idct;
1873 * - encoding: unused
1874 * - decoding: set by user.
1876 enum AVDiscard skip_frame;
1880 * - encoding: set by user.
1881 * - decoding: unused
1887 * - encoding: set by user.
1888 * - decoding: unused
1893 * constant rate factor - quality-based VBR - values ~correspond to qps
1894 * - encoding: set by user.
1895 * - decoding: unused
1900 * constant quantization parameter rate control method
1901 * - encoding: set by user.
1902 * - decoding: unused
1908 * - encoding: set by user.
1909 * - decoding: unused
1914 * number of reference frames
1915 * - encoding: set by user.
1916 * - decoding: unused
1921 * chroma qp offset from luma
1922 * - encoding: set by user.
1923 * - decoding: unused
1928 * influences how often b-frames are used
1929 * - encoding: set by user.
1930 * - decoding: unused
1935 * trellis RD quantization
1936 * - encoding: set by user.
1937 * - decoding: unused
1942 * reduce fluctuations in qp (before curve compression)
1943 * - encoding: set by user.
1944 * - decoding: unused
1946 float complexityblur;
1949 * in-loop deblocking filter alphac0 parameter
1950 * alpha is in the range -6...6
1951 * - encoding: set by user.
1952 * - decoding: unused
1957 * in-loop deblocking filter beta parameter
1958 * beta is in the range -6...6
1959 * - encoding: set by user.
1960 * - decoding: unused
1965 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1966 * - encoding: set by user.
1967 * - decoding: unused
1970 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1971 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1972 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1973 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1974 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1977 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1978 * - encoding: set by user.
1979 * - decoding: unused
1984 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1985 * - encoding: set by user.
1986 * - decoding: unused
1991 * multiplied by qscale for each frame and added to scene_change_score
1992 * - encoding: set by user.
1993 * - decoding: unused
1995 int scenechange_factor;
1999 * note: value depends upon the compare functin used for fullpel ME
2000 * - encoding: set by user.
2001 * - decoding: unused
2006 * adjusts sensitivity of b_frame_strategy 1
2007 * - encoding: set by user.
2008 * - decoding: unused
2013 * - encoding: set by user.
2014 * - decoding: unused
2016 int compression_level;
2017 #define FF_COMPRESSION_DEFAULT -1
2020 * sets whether to use LPC mode - used by FLAC encoder
2021 * - encoding: set by user.
2022 * - decoding: unused.
2027 * LPC coefficient precision - used by FLAC encoder
2028 * - encoding: set by user.
2029 * - decoding: unused.
2031 int lpc_coeff_precision;
2034 * - encoding: set by user.
2035 * - decoding: unused.
2037 int min_prediction_order;
2040 * - encoding: set by user.
2041 * - decoding: unused.
2043 int max_prediction_order;
2046 * search method for selecting prediction order
2047 * - encoding: set by user.
2048 * - decoding: unused.
2050 int prediction_order_method;
2053 * - encoding: set by user.
2054 * - decoding: unused.
2056 int min_partition_order;
2059 * - encoding: set by user.
2060 * - decoding: unused.
2062 int max_partition_order;
2065 * GOP timecode frame start number, in non drop frame format
2066 * - encoding: set by user.
2067 * - decoding: unused.
2069 int64_t timecode_frame_start;
2075 typedef struct AVCodec {
2077 enum CodecType type;
2080 int (*init)(AVCodecContext *);
2081 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2082 int (*close)(AVCodecContext *);
2083 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2084 uint8_t *buf, int buf_size);
2086 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2087 void *dummy; // FIXME remove next time we break binary compatibility
2089 struct AVCodec *next;
2090 void (*flush)(AVCodecContext *);
2091 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2092 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2096 * four components are given, that's all.
2097 * the last component is alpha
2099 typedef struct AVPicture {
2101 int linesize[4]; ///< number of bytes per line
2106 * This structure defines a method for communicating palette changes
2107 * between and demuxer and a decoder.
2108 * this is totally broken, palette changes should be sent as AVPackets
2110 #define AVPALETTE_SIZE 1024
2111 #define AVPALETTE_COUNT 256
2112 typedef struct AVPaletteControl {
2114 /* demuxer sets this to 1 to indicate the palette has changed;
2115 * decoder resets to 0 */
2116 int palette_changed;
2118 /* 4-byte ARGB palette entries, stored in native byte order; note that
2119 * the individual palette components should be on a 8-bit scale; if
2120 * the palette data comes from a IBM VGA native format, the component
2121 * data is probably 6 bits in size and needs to be scaled */
2122 unsigned int palette[AVPALETTE_COUNT];
2124 } AVPaletteControl attribute_deprecated;
2126 typedef struct AVSubtitleRect {
2133 uint32_t *rgba_palette;
2137 typedef struct AVSubtitle {
2138 uint16_t format; /* 0 = graphics */
2139 uint32_t start_display_time; /* relative to packet pts, in ms */
2140 uint32_t end_display_time; /* relative to packet pts, in ms */
2142 AVSubtitleRect *rects;
2145 extern AVCodec ac3_encoder;
2146 extern AVCodec mp2_encoder;
2147 extern AVCodec mp3lame_encoder;
2148 extern AVCodec oggvorbis_encoder;
2149 extern AVCodec faac_encoder;
2150 extern AVCodec flac_encoder;
2151 extern AVCodec gif_encoder;
2152 extern AVCodec xvid_encoder;
2153 extern AVCodec mpeg1video_encoder;
2154 extern AVCodec mpeg2video_encoder;
2155 extern AVCodec h261_encoder;
2156 extern AVCodec h263_encoder;
2157 extern AVCodec h263p_encoder;
2158 extern AVCodec flv_encoder;
2159 extern AVCodec rv10_encoder;
2160 extern AVCodec rv20_encoder;
2161 extern AVCodec dvvideo_encoder;
2162 extern AVCodec mjpeg_encoder;
2163 extern AVCodec ljpeg_encoder;
2164 extern AVCodec jpegls_encoder;
2165 extern AVCodec png_encoder;
2166 extern AVCodec ppm_encoder;
2167 extern AVCodec pgm_encoder;
2168 extern AVCodec pgmyuv_encoder;
2169 extern AVCodec pbm_encoder;
2170 extern AVCodec pam_encoder;
2171 extern AVCodec mpeg4_encoder;
2172 extern AVCodec msmpeg4v1_encoder;
2173 extern AVCodec msmpeg4v2_encoder;
2174 extern AVCodec msmpeg4v3_encoder;
2175 extern AVCodec wmv1_encoder;
2176 extern AVCodec wmv2_encoder;
2177 extern AVCodec huffyuv_encoder;
2178 extern AVCodec ffvhuff_encoder;
2179 extern AVCodec h264_encoder;
2180 extern AVCodec asv1_encoder;
2181 extern AVCodec asv2_encoder;
2182 extern AVCodec vcr1_encoder;
2183 extern AVCodec ffv1_encoder;
2184 extern AVCodec snow_encoder;
2185 extern AVCodec vorbis_encoder;
2186 extern AVCodec mdec_encoder;
2187 extern AVCodec zlib_encoder;
2188 extern AVCodec sonic_encoder;
2189 extern AVCodec sonic_ls_encoder;
2190 extern AVCodec svq1_encoder;
2191 extern AVCodec x264_encoder;
2193 extern AVCodec gif_decoder;
2194 extern AVCodec h263_decoder;
2195 extern AVCodec h261_decoder;
2196 extern AVCodec mpeg4_decoder;
2197 extern AVCodec msmpeg4v1_decoder;
2198 extern AVCodec msmpeg4v2_decoder;
2199 extern AVCodec msmpeg4v3_decoder;
2200 extern AVCodec wmv1_decoder;
2201 extern AVCodec wmv2_decoder;
2202 extern AVCodec vc1_decoder;
2203 extern AVCodec wmv3_decoder;
2204 extern AVCodec mpeg1video_decoder;
2205 extern AVCodec mpeg2video_decoder;
2206 extern AVCodec mpegvideo_decoder;
2207 extern AVCodec mpeg_xvmc_decoder;
2208 extern AVCodec h263i_decoder;
2209 extern AVCodec flv_decoder;
2210 extern AVCodec rv10_decoder;
2211 extern AVCodec rv20_decoder;
2212 extern AVCodec rv30_decoder;
2213 extern AVCodec rv40_decoder;
2214 extern AVCodec svq1_decoder;
2215 extern AVCodec svq3_decoder;
2216 extern AVCodec dvvideo_decoder;
2217 extern AVCodec wmav1_decoder;
2218 extern AVCodec wmav2_decoder;
2219 extern AVCodec mjpeg_decoder;
2220 extern AVCodec mjpegb_decoder;
2221 extern AVCodec sp5x_decoder;
2222 extern AVCodec png_decoder;
2223 extern AVCodec mp2_decoder;
2224 extern AVCodec mp3_decoder;
2225 extern AVCodec mp3adu_decoder;
2226 extern AVCodec mp3on4_decoder;
2227 extern AVCodec qdm2_decoder;
2228 extern AVCodec cook_decoder;
2229 extern AVCodec truespeech_decoder;
2230 extern AVCodec tta_decoder;
2231 extern AVCodec mace3_decoder;
2232 extern AVCodec mace6_decoder;
2233 extern AVCodec huffyuv_decoder;
2234 extern AVCodec ffvhuff_decoder;
2235 extern AVCodec oggvorbis_decoder;
2236 extern AVCodec cyuv_decoder;
2237 extern AVCodec h264_decoder;
2238 extern AVCodec indeo3_decoder;
2239 extern AVCodec vp3_decoder;
2240 extern AVCodec theora_decoder;
2241 extern AVCodec vp5_decoder;
2242 extern AVCodec vp6_decoder;
2243 extern AVCodec vp6f_decoder;
2244 extern AVCodec amr_nb_decoder;
2245 extern AVCodec amr_nb_encoder;
2246 extern AVCodec amr_wb_encoder;
2247 extern AVCodec amr_wb_decoder;
2248 extern AVCodec aac_decoder;
2249 extern AVCodec mpeg4aac_decoder;
2250 extern AVCodec asv1_decoder;
2251 extern AVCodec asv2_decoder;
2252 extern AVCodec vcr1_decoder;
2253 extern AVCodec cljr_decoder;
2254 extern AVCodec ffv1_decoder;
2255 extern AVCodec snow_decoder;
2256 extern AVCodec fourxm_decoder;
2257 extern AVCodec mdec_decoder;
2258 extern AVCodec roq_decoder;
2259 extern AVCodec interplay_video_decoder;
2260 extern AVCodec xan_wc3_decoder;
2261 extern AVCodec rpza_decoder;
2262 extern AVCodec cinepak_decoder;
2263 extern AVCodec msrle_decoder;
2264 extern AVCodec msvideo1_decoder;
2265 extern AVCodec vqa_decoder;
2266 extern AVCodec idcin_decoder;
2267 extern AVCodec eightbps_decoder;
2268 extern AVCodec smc_decoder;
2269 extern AVCodec flic_decoder;
2270 extern AVCodec vmdvideo_decoder;
2271 extern AVCodec vmdaudio_decoder;
2272 extern AVCodec truemotion1_decoder;
2273 extern AVCodec truemotion2_decoder;
2274 extern AVCodec mszh_decoder;
2275 extern AVCodec zlib_decoder;
2276 extern AVCodec ra_144_decoder;
2277 extern AVCodec ra_288_decoder;
2278 extern AVCodec roq_dpcm_decoder;
2279 extern AVCodec interplay_dpcm_decoder;
2280 extern AVCodec xan_dpcm_decoder;
2281 extern AVCodec sol_dpcm_decoder;
2282 extern AVCodec sonic_decoder;
2283 extern AVCodec qtrle_decoder;
2284 extern AVCodec flac_decoder;
2285 extern AVCodec tscc_decoder;
2286 extern AVCodec cscd_decoder;
2287 extern AVCodec nuv_decoder;
2288 extern AVCodec ulti_decoder;
2289 extern AVCodec qdraw_decoder;
2290 extern AVCodec xl_decoder;
2291 extern AVCodec qpeg_decoder;
2292 extern AVCodec shorten_decoder;
2293 extern AVCodec loco_decoder;
2294 extern AVCodec wnv1_decoder;
2295 extern AVCodec aasc_decoder;
2296 extern AVCodec alac_decoder;
2297 extern AVCodec ws_snd1_decoder;
2298 extern AVCodec indeo2_decoder;
2299 extern AVCodec vorbis_decoder;
2300 extern AVCodec fraps_decoder;
2301 extern AVCodec libgsm_encoder;
2302 extern AVCodec libgsm_decoder;
2303 extern AVCodec bmp_decoder;
2304 extern AVCodec mmvideo_decoder;
2305 extern AVCodec zmbv_decoder;
2306 extern AVCodec avs_decoder;
2307 extern AVCodec smacker_decoder;
2308 extern AVCodec smackaud_decoder;
2309 extern AVCodec kmvc_decoder;
2310 extern AVCodec flashsv_decoder;
2311 extern AVCodec cavs_decoder;
2312 extern AVCodec vmnc_decoder;
2313 extern AVCodec wavpack_decoder;
2314 extern AVCodec targa_decoder;
2315 extern AVCodec dsicinvideo_decoder;
2316 extern AVCodec dsicinaudio_decoder;
2317 extern AVCodec tiertexseqvideo_decoder;
2318 extern AVCodec tiff_decoder;
2319 extern AVCodec imc_decoder;
2322 #define PCM_CODEC(id, name) \
2323 extern AVCodec name ## _decoder; \
2324 extern AVCodec name ## _encoder
2326 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2327 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2328 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2329 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2330 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2331 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2332 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2333 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2334 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2335 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2336 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2337 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2338 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2339 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2340 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2341 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2342 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2346 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2347 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2348 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2349 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2350 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2351 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2352 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2353 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2354 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2355 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2356 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2357 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2358 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2359 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2360 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2361 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2362 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2363 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2367 /* dummy raw video codec */
2368 extern AVCodec rawvideo_encoder;
2369 extern AVCodec rawvideo_decoder;
2371 /* the following codecs use external GPL libs */
2372 extern AVCodec ac3_decoder;
2373 extern AVCodec dts_decoder;
2376 extern AVCodec dvdsub_encoder;
2377 extern AVCodec dvdsub_decoder;
2378 extern AVCodec dvbsub_encoder;
2379 extern AVCodec dvbsub_decoder;
2383 struct ReSampleContext;
2384 struct AVResampleContext;
2386 typedef struct ReSampleContext ReSampleContext;
2388 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2389 int output_rate, int input_rate);
2390 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2391 void audio_resample_close(ReSampleContext *s);
2393 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2394 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2395 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2396 void av_resample_close(struct AVResampleContext *c);
2398 /* YUV420 format is assumed ! */
2400 struct ImgReSampleContext;
2402 typedef struct ImgReSampleContext ImgReSampleContext;
2404 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2405 int input_width, int input_height);
2407 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2408 int iwidth, int iheight,
2409 int topBand, int bottomBand,
2410 int leftBand, int rightBand,
2411 int padtop, int padbottom,
2412 int padleft, int padright);
2415 void img_resample(ImgReSampleContext *s,
2416 AVPicture *output, const AVPicture *input);
2418 void img_resample_close(ImgReSampleContext *s);
2421 * Allocate memory for a picture. Call avpicture_free to free it.
2423 * @param picture the picture to be filled in.
2424 * @param pix_fmt the format of the picture.
2425 * @param width the width of the picture.
2426 * @param height the height of the picture.
2427 * @return 0 if successful, -1 if not.
2429 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2431 /* Free a picture previously allocated by avpicture_alloc. */
2432 void avpicture_free(AVPicture *picture);
2434 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2435 int pix_fmt, int width, int height);
2436 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2437 unsigned char *dest, int dest_size);
2438 int avpicture_get_size(int pix_fmt, int width, int height);
2439 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2440 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2441 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2442 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2443 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2445 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2446 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2447 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2448 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2449 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2450 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2452 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2454 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2455 int has_alpha, int *loss_ptr);
2457 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2458 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2459 int img_get_alpha_info(const AVPicture *src,
2460 int pix_fmt, int width, int height);
2462 /* convert among pixel formats */
2463 int img_convert(AVPicture *dst, int dst_pix_fmt,
2464 const AVPicture *src, int pix_fmt,
2465 int width, int height);
2467 /* deinterlace a picture */
2468 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2469 int pix_fmt, int width, int height);
2471 /* external high level API */
2473 extern AVCodec *first_avcodec;
2475 /* returns LIBAVCODEC_VERSION_INT constant */
2476 unsigned avcodec_version(void);
2477 /* returns LIBAVCODEC_BUILD constant */
2478 unsigned avcodec_build(void);
2479 void avcodec_init(void);
2481 void register_avcodec(AVCodec *format);
2482 AVCodec *avcodec_find_encoder(enum CodecID id);
2483 AVCodec *avcodec_find_encoder_by_name(const char *name);
2484 AVCodec *avcodec_find_decoder(enum CodecID id);
2485 AVCodec *avcodec_find_decoder_by_name(const char *name);
2486 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2488 void avcodec_get_context_defaults(AVCodecContext *s);
2489 AVCodecContext *avcodec_alloc_context(void);
2490 void avcodec_get_frame_defaults(AVFrame *pic);
2491 AVFrame *avcodec_alloc_frame(void);
2493 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2494 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2495 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2496 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2497 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2498 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2500 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2501 void avcodec_thread_free(AVCodecContext *s);
2502 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2503 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2504 //FIXME func typedef
2507 * opens / inits the AVCodecContext.
2510 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2513 * Decode an audio frame.
2515 * @param avctx the codec context.
2516 * @param samples output buffer, 16 byte aligned
2517 * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
2518 * @param buf input buffer, 16 byte aligned
2519 * @param buf_size the input buffer size
2520 * @return 0 if successful, -1 if not.
2523 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2524 int *frame_size_ptr,
2525 uint8_t *buf, int buf_size);
2526 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2527 int *got_picture_ptr,
2528 uint8_t *buf, int buf_size);
2529 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2531 const uint8_t *buf, int buf_size);
2532 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2534 uint8_t *buf, int buf_size);
2535 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2536 const short *samples);
2537 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2538 const AVFrame *pict);
2539 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2540 const AVSubtitle *sub);
2542 int avcodec_close(AVCodecContext *avctx);
2544 void avcodec_register_all(void);
2546 void avcodec_flush_buffers(AVCodecContext *avctx);
2548 void avcodec_default_free_buffers(AVCodecContext *s);
2550 /* misc usefull functions */
2553 * returns a single letter to describe the picture type
2555 char av_get_pict_type_char(int pict_type);
2558 * returns codec bits per sample
2560 int av_get_bits_per_sample(enum CodecID codec_id);
2563 typedef struct AVCodecParserContext {
2565 struct AVCodecParser *parser;
2566 int64_t frame_offset; /* offset of the current frame */
2567 int64_t cur_offset; /* current offset
2568 (incremented by each av_parser_parse()) */
2569 int64_t last_frame_offset; /* offset of the last frame */
2571 int pict_type; /* XXX: put it back in AVCodecContext */
2572 int repeat_pict; /* XXX: put it back in AVCodecContext */
2573 int64_t pts; /* pts of the current frame */
2574 int64_t dts; /* dts of the current frame */
2579 int fetch_timestamp;
2581 #define AV_PARSER_PTS_NB 4
2582 int cur_frame_start_index;
2583 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2584 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2585 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2588 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2589 } AVCodecParserContext;
2591 typedef struct AVCodecParser {
2592 int codec_ids[5]; /* several codec IDs are permitted */
2594 int (*parser_init)(AVCodecParserContext *s);
2595 int (*parser_parse)(AVCodecParserContext *s,
2596 AVCodecContext *avctx,
2597 uint8_t **poutbuf, int *poutbuf_size,
2598 const uint8_t *buf, int buf_size);
2599 void (*parser_close)(AVCodecParserContext *s);
2600 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2601 struct AVCodecParser *next;
2604 extern AVCodecParser *av_first_parser;
2606 void av_register_codec_parser(AVCodecParser *parser);
2607 AVCodecParserContext *av_parser_init(int codec_id);
2608 int av_parser_parse(AVCodecParserContext *s,
2609 AVCodecContext *avctx,
2610 uint8_t **poutbuf, int *poutbuf_size,
2611 const uint8_t *buf, int buf_size,
2612 int64_t pts, int64_t dts);
2613 int av_parser_change(AVCodecParserContext *s,
2614 AVCodecContext *avctx,
2615 uint8_t **poutbuf, int *poutbuf_size,
2616 const uint8_t *buf, int buf_size, int keyframe);
2617 void av_parser_close(AVCodecParserContext *s);
2619 extern AVCodecParser mpegvideo_parser;
2620 extern AVCodecParser mpeg4video_parser;
2621 extern AVCodecParser cavsvideo_parser;
2622 extern AVCodecParser h261_parser;
2623 extern AVCodecParser h263_parser;
2624 extern AVCodecParser h264_parser;
2625 extern AVCodecParser mjpeg_parser;
2626 extern AVCodecParser pnm_parser;
2627 extern AVCodecParser mpegaudio_parser;
2628 extern AVCodecParser ac3_parser;
2629 extern AVCodecParser dvdsub_parser;
2630 extern AVCodecParser dvbsub_parser;
2631 extern AVCodecParser aac_parser;
2634 typedef struct AVBitStreamFilterContext {
2636 struct AVBitStreamFilter *filter;
2637 AVCodecParserContext *parser;
2638 struct AVBitStreamFilterContext *next;
2639 } AVBitStreamFilterContext;
2642 typedef struct AVBitStreamFilter {
2645 int (*filter)(AVBitStreamFilterContext *bsfc,
2646 AVCodecContext *avctx, const char *args,
2647 uint8_t **poutbuf, int *poutbuf_size,
2648 const uint8_t *buf, int buf_size, int keyframe);
2649 struct AVBitStreamFilter *next;
2650 } AVBitStreamFilter;
2652 extern AVBitStreamFilter *av_first_bitstream_filter;
2654 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2655 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2656 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2657 AVCodecContext *avctx, const char *args,
2658 uint8_t **poutbuf, int *poutbuf_size,
2659 const uint8_t *buf, int buf_size, int keyframe);
2660 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2662 extern AVBitStreamFilter dump_extradata_bsf;
2663 extern AVBitStreamFilter remove_extradata_bsf;
2664 extern AVBitStreamFilter noise_bsf;
2665 extern AVBitStreamFilter mp3_header_compress_bsf;
2666 extern AVBitStreamFilter mp3_header_decompress_bsf;
2667 extern AVBitStreamFilter mjpega_dump_header_bsf;
2671 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2672 /* for static data only */
2673 /* call av_free_static to release all staticaly allocated tables */
2674 void av_free_static(void);
2675 void *av_mallocz_static(unsigned int size);
2676 void *av_realloc_static(void *ptr, unsigned int size);
2678 void img_copy(AVPicture *dst, const AVPicture *src,
2679 int pix_fmt, int width, int height);
2681 int img_crop(AVPicture *dst, const AVPicture *src,
2682 int pix_fmt, int top_band, int left_band);
2684 int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2685 int padtop, int padbottom, int padleft, int padright, int *color);
2687 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2693 #endif /* AVCODEC_H */