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 Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_AVCODEC_H
22 #define AVCODEC_AVCODEC_H
30 #include "libavutil/avutil.h"
32 #define LIBAVCODEC_VERSION_MAJOR 52
33 #define LIBAVCODEC_VERSION_MINOR 83
34 #define LIBAVCODEC_VERSION_MICRO 0
36 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
37 LIBAVCODEC_VERSION_MINOR, \
38 LIBAVCODEC_VERSION_MICRO)
39 #define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
40 LIBAVCODEC_VERSION_MINOR, \
41 LIBAVCODEC_VERSION_MICRO)
42 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
44 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
46 #define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
47 #define AV_TIME_BASE 1000000
48 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
51 * Identify the syntax and semantics of the bitstream.
52 * The principle is roughly:
53 * Two decoders with the same ID can decode the same streams.
54 * Two encoders with the same ID can encode compatible streams.
55 * There may be slight deviations from the principle due to implementation
58 * If you add a codec ID to this list, add it so that
59 * 1. no value of a existing codec ID changes (that would break ABI),
60 * 2. it is as close as possible to similar codecs.
67 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
68 CODEC_ID_MPEG2VIDEO_XVMC,
105 CODEC_ID_INTERPLAY_VIDEO,
117 CODEC_ID_TRUEMOTION1,
128 #if LIBAVCODEC_VERSION_MAJOR < 53
147 CODEC_ID_TRUEMOTION2,
164 CODEC_ID_DSICINVIDEO,
165 CODEC_ID_TIERTEXSEQVIDEO,
174 CODEC_ID_BETHSOFTVID,
192 CODEC_ID_MOTIONPIXELS,
210 CODEC_ID_IFF_BYTERUN1,
216 /* various PCM "codecs" */
217 CODEC_ID_PCM_S16LE= 0x10000,
233 CODEC_ID_PCM_S24DAUD,
235 CODEC_ID_PCM_S16LE_PLANAR,
243 /* various ADPCM codecs */
244 CODEC_ID_ADPCM_IMA_QT= 0x11000,
245 CODEC_ID_ADPCM_IMA_WAV,
246 CODEC_ID_ADPCM_IMA_DK3,
247 CODEC_ID_ADPCM_IMA_DK4,
248 CODEC_ID_ADPCM_IMA_WS,
249 CODEC_ID_ADPCM_IMA_SMJPEG,
258 CODEC_ID_ADPCM_YAMAHA,
259 CODEC_ID_ADPCM_SBPRO_4,
260 CODEC_ID_ADPCM_SBPRO_3,
261 CODEC_ID_ADPCM_SBPRO_2,
263 CODEC_ID_ADPCM_IMA_AMV,
264 CODEC_ID_ADPCM_EA_R1,
265 CODEC_ID_ADPCM_EA_R3,
266 CODEC_ID_ADPCM_EA_R2,
267 CODEC_ID_ADPCM_IMA_EA_SEAD,
268 CODEC_ID_ADPCM_IMA_EA_EACS,
269 CODEC_ID_ADPCM_EA_XAS,
270 CODEC_ID_ADPCM_EA_MAXIS_XA,
271 CODEC_ID_ADPCM_IMA_ISS,
274 CODEC_ID_AMR_NB= 0x12000,
277 /* RealAudio codecs*/
278 CODEC_ID_RA_144= 0x13000,
281 /* various DPCM codecs */
282 CODEC_ID_ROQ_DPCM= 0x14000,
283 CODEC_ID_INTERPLAY_DPCM,
288 CODEC_ID_MP2= 0x15000,
289 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
307 CODEC_ID_WESTWOOD_SND1,
308 CODEC_ID_GSM, ///< as in Berlin toast format
316 CODEC_ID_DSICINAUDIO,
320 CODEC_ID_GSM_MS, /* as found in WAV */
329 CODEC_ID_WMALOSSLESS,
338 CODEC_ID_BINKAUDIO_RDFT,
339 CODEC_ID_BINKAUDIO_DCT,
341 /* subtitle codecs */
342 CODEC_ID_DVD_SUBTITLE= 0x17000,
343 CODEC_ID_DVB_SUBTITLE,
344 CODEC_ID_TEXT, ///< raw UTF-8 text
348 CODEC_ID_HDMV_PGS_SUBTITLE,
349 CODEC_ID_DVB_TELETEXT,
351 /* other specific kind of codecs (generally used for attachments) */
352 CODEC_ID_TTF= 0x18000,
354 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
356 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
357 * stream (only used by libavformat) */
360 #if LIBAVCODEC_VERSION_MAJOR < 53
361 #define CodecType AVMediaType
363 #define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
364 #define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
365 #define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
366 #define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
367 #define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
368 #define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
369 #define CODEC_TYPE_NB AVMEDIA_TYPE_NB
373 * all in native-endian format
376 SAMPLE_FMT_NONE = -1,
377 SAMPLE_FMT_U8, ///< unsigned 8 bits
378 SAMPLE_FMT_S16, ///< signed 16 bits
379 SAMPLE_FMT_S32, ///< signed 32 bits
380 SAMPLE_FMT_FLT, ///< float
381 SAMPLE_FMT_DBL, ///< double
382 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
385 /* Audio channel masks */
386 #define CH_FRONT_LEFT 0x00000001
387 #define CH_FRONT_RIGHT 0x00000002
388 #define CH_FRONT_CENTER 0x00000004
389 #define CH_LOW_FREQUENCY 0x00000008
390 #define CH_BACK_LEFT 0x00000010
391 #define CH_BACK_RIGHT 0x00000020
392 #define CH_FRONT_LEFT_OF_CENTER 0x00000040
393 #define CH_FRONT_RIGHT_OF_CENTER 0x00000080
394 #define CH_BACK_CENTER 0x00000100
395 #define CH_SIDE_LEFT 0x00000200
396 #define CH_SIDE_RIGHT 0x00000400
397 #define CH_TOP_CENTER 0x00000800
398 #define CH_TOP_FRONT_LEFT 0x00001000
399 #define CH_TOP_FRONT_CENTER 0x00002000
400 #define CH_TOP_FRONT_RIGHT 0x00004000
401 #define CH_TOP_BACK_LEFT 0x00008000
402 #define CH_TOP_BACK_CENTER 0x00010000
403 #define CH_TOP_BACK_RIGHT 0x00020000
404 #define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
405 #define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
407 /** Channel mask value used for AVCodecContext.request_channel_layout
408 to indicate that the user requests the channel order of the decoder output
409 to be the native codec channel order. */
410 #define CH_LAYOUT_NATIVE 0x8000000000000000LL
412 /* Audio channel convenience macros */
413 #define CH_LAYOUT_MONO (CH_FRONT_CENTER)
414 #define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
415 #define CH_LAYOUT_2_1 (CH_LAYOUT_STEREO|CH_BACK_CENTER)
416 #define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
417 #define CH_LAYOUT_4POINT0 (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
418 #define CH_LAYOUT_2_2 (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
419 #define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
420 #define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
421 #define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
422 #define CH_LAYOUT_5POINT0_BACK (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
423 #define CH_LAYOUT_5POINT1_BACK (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
424 #define CH_LAYOUT_7POINT0 (CH_LAYOUT_5POINT0|CH_BACK_LEFT|CH_BACK_RIGHT)
425 #define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
426 #define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_5POINT1_BACK|\
427 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
428 #define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
431 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
434 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
435 * This is mainly needed because some optimized bitstream readers read
436 * 32 or 64 bit at once and could read over the end.<br>
437 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
438 * MPEG bitstreams could cause overread and segfault.
440 #define FF_INPUT_BUFFER_PADDING_SIZE 8
443 * minimum encoding buffer size
444 * Used to avoid some checks during header writing.
446 #define FF_MIN_BUFFER_SIZE 16384
450 * motion estimation type.
453 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
457 ME_EPZS, ///< enhanced predictive zonal search
458 ME_X1, ///< reserved for experiments
459 ME_HEX, ///< hexagon based search
460 ME_UMH, ///< uneven multi-hexagon search
461 ME_ITER, ///< iterative search
462 ME_TESA, ///< transformed exhaustive search algorithm
466 /* We leave some space between them for extensions (drop some
467 * keyframes for intra-only or drop just some bidir frames). */
468 AVDISCARD_NONE =-16, ///< discard nothing
469 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
470 AVDISCARD_NONREF = 8, ///< discard all non reference
471 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
472 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
473 AVDISCARD_ALL = 48, ///< discard all
476 enum AVColorPrimaries{
477 AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
478 AVCOL_PRI_UNSPECIFIED=2,
480 AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
481 AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
482 AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
484 AVCOL_PRI_NB , ///< Not part of ABI
487 enum AVColorTransferCharacteristic{
488 AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
489 AVCOL_TRC_UNSPECIFIED=2,
490 AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
491 AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
492 AVCOL_TRC_NB , ///< Not part of ABI
497 AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
498 AVCOL_SPC_UNSPECIFIED=2,
500 AVCOL_SPC_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
501 AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
502 AVCOL_SPC_SMPTE240M =7,
503 AVCOL_SPC_NB , ///< Not part of ABI
507 AVCOL_RANGE_UNSPECIFIED=0,
508 AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
509 AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
510 AVCOL_RANGE_NB , ///< Not part of ABI
514 * X X 3 4 X X are luma samples,
515 * 1 2 1-6 are possible chroma positions
516 * X X 5 6 X 0 is undefined/unknown position
518 enum AVChromaLocation{
519 AVCHROMA_LOC_UNSPECIFIED=0,
520 AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
521 AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
522 AVCHROMA_LOC_TOPLEFT =3, ///< DV
524 AVCHROMA_LOC_BOTTOMLEFT =5,
525 AVCHROMA_LOC_BOTTOM =6,
526 AVCHROMA_LOC_NB , ///< Not part of ABI
533 AV_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type
534 AV_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients
535 AV_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients
536 AV_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion
537 AV_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization
538 AV_LPC_TYPE_NB , ///< Not part of ABI
541 typedef struct RcOverride{
544 int qscale; // If this is 0 then quality_factor will be used instead.
545 float quality_factor;
548 #define FF_MAX_B_FRAMES 16
551 These flags can be passed in AVCodecContext.flags before initialization.
552 Note: Not everything is supported yet.
555 #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
556 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
557 #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
558 #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
559 #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
560 #define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
562 * The parent program guarantees that the input for B-frames containing
563 * streams is not written to for at least s->max_b_frames+1 frames, if
564 * this is not set the input will be copied.
566 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
567 #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
568 #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
569 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
570 #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
571 #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
572 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
573 #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
574 location instead of only at frame boundaries. */
575 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
576 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
577 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
578 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
579 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
580 #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
581 /* Fx : Flag for h263+ extra options */
582 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
583 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
584 #define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
585 #define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
586 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
587 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
588 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
589 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
590 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
591 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
592 #define CODEC_FLAG_CLOSED_GOP 0x80000000
593 #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
594 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
595 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
596 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
597 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
598 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
599 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
600 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
601 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
602 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
603 #define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
604 #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
605 #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
606 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
607 #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
608 #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
609 #define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
610 #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
611 #define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
612 #define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
613 #define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
614 #define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
616 /* Unsupported options :
617 * Syntax Arithmetic coding (SAC)
618 * Reference Picture Selection
619 * Independent Segment Decoding */
621 /* codec capabilities */
623 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
625 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
626 * If not set, it might not use get_buffer() at all or use operations that
627 * assume the buffer was allocated by avcodec_default_get_buffer.
629 #define CODEC_CAP_DR1 0x0002
630 /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
631 #define CODEC_CAP_PARSE_ONLY 0x0004
632 #define CODEC_CAP_TRUNCATED 0x0008
633 /* Codec can export data for HW decoding (XvMC). */
634 #define CODEC_CAP_HWACCEL 0x0010
636 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
637 * If this is not set, the codec is guaranteed to never be fed with NULL data.
639 #define CODEC_CAP_DELAY 0x0020
641 * Codec can be fed a final frame with a smaller size.
642 * This can be used to prevent truncation of the last audio samples.
644 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
646 * Codec can export data for HW decoding (VDPAU).
648 #define CODEC_CAP_HWACCEL_VDPAU 0x0080
650 * Codec can output multiple frames per AVPacket
651 * Normally demuxers return one frame at a time, demuxers which do not do
652 * are connected to a parser to split what they return into proper frames.
653 * This flag is reserved to the very rare category of codecs which have a
654 * bitstream that cannot be split into frames without timeconsuming
655 * operations like full decoding. Demuxers carring such bitstreams thus
656 * may return multiple frames in a packet. This has many disadvantages like
657 * prohibiting stream copy in many cases thus it should only be considered
660 #define CODEC_CAP_SUBFRAMES 0x0100
662 * Codec is experimental and is thus avoided in favor of non experimental
665 #define CODEC_CAP_EXPERIMENTAL 0x0200
667 //The following defines may change, don't expect compatibility if you use them.
668 #define MB_TYPE_INTRA4x4 0x0001
669 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
670 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
671 #define MB_TYPE_16x16 0x0008
672 #define MB_TYPE_16x8 0x0010
673 #define MB_TYPE_8x16 0x0020
674 #define MB_TYPE_8x8 0x0040
675 #define MB_TYPE_INTERLACED 0x0080
676 #define MB_TYPE_DIRECT2 0x0100 //FIXME
677 #define MB_TYPE_ACPRED 0x0200
678 #define MB_TYPE_GMC 0x0400
679 #define MB_TYPE_SKIP 0x0800
680 #define MB_TYPE_P0L0 0x1000
681 #define MB_TYPE_P1L0 0x2000
682 #define MB_TYPE_P0L1 0x4000
683 #define MB_TYPE_P1L1 0x8000
684 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
685 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
686 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
687 #define MB_TYPE_QUANT 0x00010000
688 #define MB_TYPE_CBP 0x00020000
689 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
693 * This specifies the area which should be displayed.
694 * Note there may be multiple such areas for one frame.
696 typedef struct AVPanScan{
699 * - encoding: Set by user.
700 * - decoding: Set by libavcodec.
705 * width and height in 1/16 pel
706 * - encoding: Set by user.
707 * - decoding: Set by libavcodec.
713 * position of the top left corner in 1/16 pel for up to 3 fields/frames
714 * - encoding: Set by user.
715 * - decoding: Set by libavcodec.
717 int16_t position[3][2];
720 #define FF_COMMON_FRAME \
722 * pointer to the picture planes.\
723 * This might be different from the first allocated byte\
730 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
731 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
737 * 1 -> keyframe, 0-> not\
738 * - encoding: Set by libavcodec.\
739 * - decoding: Set by libavcodec.\
744 * Picture type of the frame, see ?_TYPE below.\
745 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
746 * - decoding: Set by libavcodec.\
751 * presentation timestamp in time_base units (time when frame should be shown to user)\
752 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
753 * - encoding: MUST be set by user.\
754 * - decoding: Set by libavcodec.\
759 * picture number in bitstream order\
760 * - encoding: set by\
761 * - decoding: Set by libavcodec.\
763 int coded_picture_number;\
765 * picture number in display order\
766 * - encoding: set by\
767 * - decoding: Set by libavcodec.\
769 int display_picture_number;\
772 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
773 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
774 * - decoding: Set by libavcodec.\
779 * buffer age (1->was last buffer and dint change, 2->..., ...).\
780 * Set to INT_MAX if the buffer has not been used yet.\
781 * - encoding: unused\
782 * - decoding: MUST be set by get_buffer().\
787 * is this picture used as reference\
788 * The values for this are the same as the MpegEncContext.picture_structure\
789 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
790 * Set to 4 for delayed, non-reference frames.\
791 * - encoding: unused\
792 * - decoding: Set by libavcodec. (before get_buffer() call)).\
798 * - encoding: unused\
799 * - decoding: Set by libavcodec.\
801 int8_t *qscale_table;\
804 * - encoding: unused\
805 * - decoding: Set by libavcodec.\
810 * mbskip_table[mb]>=1 if MB didn't change\
811 * stride= mb_width = (width+15)>>4\
812 * - encoding: unused\
813 * - decoding: Set by libavcodec.\
815 uint8_t *mbskip_table;\
818 * motion vector table\
821 * int mv_sample_log2= 4 - motion_subsample_log2;\
822 * int mb_width= (width+15)>>4;\
823 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
824 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
826 * - encoding: Set by user.\
827 * - decoding: Set by libavcodec.\
829 int16_t (*motion_val[2])[2];\
832 * macroblock type table\
833 * mb_type_base + mb_width + 2\
834 * - encoding: Set by user.\
835 * - decoding: Set by libavcodec.\
840 * log2 of the size of the block which a single vector in motion_val represents: \
841 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
842 * - encoding: unused\
843 * - decoding: Set by libavcodec.\
845 uint8_t motion_subsample_log2;\
848 * for some private data of the user\
849 * - encoding: unused\
850 * - decoding: Set by user.\
856 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
857 * - decoding: unused\
862 * type of the buffer (to keep track of who has to deallocate data[*])\
863 * - encoding: Set by the one who allocates it.\
864 * - decoding: Set by the one who allocates it.\
865 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
870 * When decoding, this signals how much the picture must be delayed.\
871 * extra_delay = repeat_pict / (2*fps)\
872 * - encoding: unused\
873 * - decoding: Set by libavcodec.\
883 * The content of the picture is interlaced.\
884 * - encoding: Set by user.\
885 * - decoding: Set by libavcodec. (default 0)\
887 int interlaced_frame;\
890 * If the content is interlaced, is top field displayed first.\
891 * - encoding: Set by user.\
892 * - decoding: Set by libavcodec.\
894 int top_field_first;\
898 * - encoding: Set by user.\
899 * - decoding: Set by libavcodec.\
901 AVPanScan *pan_scan;\
904 * Tell user application that palette has changed from previous frame.\
905 * - encoding: ??? (no palette-enabled encoder yet)\
906 * - decoding: Set by libavcodec. (default 0).\
908 int palette_has_changed;\
911 * codec suggestion on buffer type if != 0\
912 * - encoding: unused\
913 * - decoding: Set by libavcodec. (before get_buffer() call)).\
919 * - encoding: unused\
920 * - decoding: Set by libavcodec.\
925 * motion reference frame index\
926 * the order in which these are stored can depend on the codec.\
927 * - encoding: Set by user.\
928 * - decoding: Set by libavcodec.\
930 int8_t *ref_index[2];\
933 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
934 * output in AVFrame.reordered_opaque\
935 * - encoding: unused\
936 * - decoding: Read by user.\
938 int64_t reordered_opaque;\
941 * hardware accelerator private data (FFmpeg allocated)\
942 * - encoding: unused\
943 * - decoding: Set by libavcodec\
945 void *hwaccel_picture_private;\
948 #define FF_QSCALE_TYPE_MPEG1 0
949 #define FF_QSCALE_TYPE_MPEG2 1
950 #define FF_QSCALE_TYPE_H264 2
951 #define FF_QSCALE_TYPE_VP56 3
953 #define FF_BUFFER_TYPE_INTERNAL 1
954 #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
955 #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
956 #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
959 #define FF_I_TYPE 1 ///< Intra
960 #define FF_P_TYPE 2 ///< Predicted
961 #define FF_B_TYPE 3 ///< Bi-dir predicted
962 #define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
963 #define FF_SI_TYPE 5 ///< Switching Intra
964 #define FF_SP_TYPE 6 ///< Switching Predicted
967 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
968 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
969 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
970 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
972 typedef struct AVPacket {
974 * Presentation timestamp in AVStream->time_base units; the time at which
975 * the decompressed packet will be presented to the user.
976 * Can be AV_NOPTS_VALUE if it is not stored in the file.
977 * pts MUST be larger or equal to dts as presentation cannot happen before
978 * decompression, unless one wants to view hex dumps. Some formats misuse
979 * the terms dts and pts/cts to mean something different. Such timestamps
980 * must be converted to true pts/dts before they are stored in AVPacket.
984 * Decompression timestamp in AVStream->time_base units; the time at which
985 * the packet is decompressed.
986 * Can be AV_NOPTS_VALUE if it is not stored in the file.
994 * Duration of this packet in AVStream->time_base units, 0 if unknown.
995 * Equals next_pts - this_pts in presentation order.
998 void (*destruct)(struct AVPacket *);
1000 int64_t pos; ///< byte position in stream, -1 if unknown
1003 * Time difference in AVStream->time_base units from the pts of this
1004 * packet to the point at which the output from the decoder has converged
1005 * independent from the availability of previous frames. That is, the
1006 * frames are virtually identical no matter if decoding started from
1007 * the very first frame or from this keyframe.
1008 * Is AV_NOPTS_VALUE if unknown.
1009 * This field is not the display duration of the current packet.
1010 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1013 * The purpose of this field is to allow seeking in streams that have no
1014 * keyframes in the conventional sense. It corresponds to the
1015 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1016 * essential for some types of subtitle streams to ensure that all
1017 * subtitles are correctly displayed after seeking.
1019 int64_t convergence_duration;
1021 #define AV_PKT_FLAG_KEY 0x0001
1022 #if LIBAVCODEC_VERSION_MAJOR < 53
1023 #define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1027 * Audio Video Frame.
1028 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1030 * Removal, reordering and changes to existing fields require a major
1031 * version bump. No fields should be added into AVFrame before or after
1033 * sizeof(AVFrame) must not be used outside libav*.
1035 typedef struct AVFrame {
1040 * main external API structure.
1041 * New fields can be added to the end with minor version bumps.
1042 * Removal, reordering and changes to existing fields require a major
1044 * sizeof(AVCodecContext) must not be used outside libav*.
1046 typedef struct AVCodecContext {
1048 * information on struct for av_log
1049 * - set by avcodec_alloc_context
1051 const AVClass *av_class;
1053 * the average bitrate
1054 * - encoding: Set by user; unused for constant quantizer encoding.
1055 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1060 * number of bits the bitstream is allowed to diverge from the reference.
1061 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1062 * - encoding: Set by user; unused for constant quantizer encoding.
1063 * - decoding: unused
1065 int bit_rate_tolerance;
1069 * - encoding: Set by user.
1070 * - decoding: Set by user.
1075 * Some codecs need additional format info. It is stored here.
1076 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1077 * specific codec MUST set it correctly otherwise stream copy breaks.
1078 * In general use of this field by muxers is not recommanded.
1079 * - encoding: Set by libavcodec.
1080 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1085 * Motion estimation algorithm used for video coding.
1086 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1087 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1088 * - encoding: MUST be set by user.
1089 * - decoding: unused
1094 * some codecs need / can use extradata like Huffman tables.
1095 * mjpeg: Huffman tables
1096 * rv10: additional flags
1097 * mpeg4: global headers (they can be in the bitstream or here)
1098 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1099 * than extradata_size to avoid prolems if it is read with the bitstream reader.
1100 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1101 * - encoding: Set/allocated/freed by libavcodec.
1102 * - decoding: Set/allocated/freed by user.
1108 * This is the fundamental unit of time (in seconds) in terms
1109 * of which frame timestamps are represented. For fixed-fps content,
1110 * timebase should be 1/framerate and timestamp increments should be
1112 * - encoding: MUST be set by user.
1113 * - decoding: Set by libavcodec.
1115 AVRational time_base;
1119 * picture width / height.
1120 * - encoding: MUST be set by user.
1121 * - decoding: Set by libavcodec.
1122 * Note: For compatibility it is possible to set this instead of
1123 * coded_width/height before decoding.
1127 #define FF_ASPECT_EXTENDED 15
1130 * the number of pictures in a group of pictures, or 0 for intra_only
1131 * - encoding: Set by user.
1132 * - decoding: unused
1137 * Pixel format, see PIX_FMT_xxx.
1138 * May be set by the demuxer if known from headers.
1139 * May be overriden by the decoder if it knows better.
1140 * - encoding: Set by user.
1141 * - decoding: Set by user if known, overridden by libavcodec if known
1143 enum PixelFormat pix_fmt;
1146 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1147 * has to read frames at native frame rate.
1148 * - encoding: Set by user.
1149 * - decoding: unused
1154 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1155 * decoder to draw a horizontal band. It improves cache usage. Not
1156 * all codecs can do that. You must check the codec capabilities
1158 * The function is also used by hardware acceleration APIs.
1159 * It is called at least once during frame decoding to pass
1160 * the data needed for hardware render.
1161 * In that mode instead of pixel data, AVFrame points to
1162 * a structure specific to the acceleration API. The application
1163 * reads the structure and can change some fields to indicate progress
1165 * - encoding: unused
1166 * - decoding: Set by user.
1167 * @param height the height of the slice
1168 * @param y the y position of the slice
1169 * @param type 1->top field, 2->bottom field, 3->frame
1170 * @param offset offset into the AVFrame.data from which the slice should be read
1172 void (*draw_horiz_band)(struct AVCodecContext *s,
1173 const AVFrame *src, int offset[4],
1174 int y, int type, int height);
1177 int sample_rate; ///< samples per second
1178 int channels; ///< number of audio channels
1181 * audio sample format
1182 * - encoding: Set by user.
1183 * - decoding: Set by libavcodec.
1185 enum SampleFormat sample_fmt; ///< sample format
1187 /* The following data should not be initialized. */
1189 * Samples per packet, initialized when calling 'init'.
1192 int frame_number; ///< audio or video frame number
1193 #if LIBAVCODEC_VERSION_MAJOR < 53
1194 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
1198 * Number of frames the decoded output will be delayed relative to
1199 * the encoded input.
1200 * - encoding: Set by libavcodec.
1201 * - decoding: unused
1205 /* - encoding parameters */
1206 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1207 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1211 * - encoding: Set by user.
1212 * - decoding: unused
1218 * - encoding: Set by user.
1219 * - decoding: unused
1224 * maximum quantizer difference between frames
1225 * - encoding: Set by user.
1226 * - decoding: unused
1231 * maximum number of B-frames between non-B-frames
1232 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1233 * - encoding: Set by user.
1234 * - decoding: unused
1239 * qscale factor between IP and B-frames
1240 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1241 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1242 * - encoding: Set by user.
1243 * - decoding: unused
1245 float b_quant_factor;
1247 /** obsolete FIXME remove */
1249 #define FF_RC_STRATEGY_XVID 1
1251 int b_frame_strategy;
1255 * - encoding: unused
1256 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1257 * @deprecated Deprecated in favor of skip_idct and skip_frame.
1261 struct AVCodec *codec;
1265 int rtp_payload_size; /* The size of the RTP payload: the coder will */
1266 /* do its best to deliver a chunk with size */
1267 /* below rtp_payload_size, the chunk will start */
1268 /* with a start code on some codecs like H.263. */
1269 /* This doesn't take account of any particular */
1270 /* headers inside the transmitted RTP payload. */
1273 /* The RTP callback: This function is called */
1274 /* every time the encoder has a packet to send. */
1275 /* It depends on the encoder if the data starts */
1276 /* with a Start Code (it should). H.263 does. */
1277 /* mb_nb contains the number of macroblocks */
1278 /* encoded in the RTP payload. */
1279 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1281 /* statistics, used for 2-pass encoding */
1292 * number of bits used for the previously encoded frame
1293 * - encoding: Set by libavcodec.
1294 * - decoding: unused
1299 * Private data of the user, can be used to carry app specific stuff.
1300 * - encoding: Set by user.
1301 * - decoding: Set by user.
1305 char codec_name[32];
1306 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1307 enum CodecID codec_id; /* see CODEC_ID_xxx */
1310 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1311 * This is used to work around some encoder bugs.
1312 * A demuxer should set this to what is stored in the field used to identify the codec.
1313 * If there are multiple such fields in a container then the demuxer should choose the one
1314 * which maximizes the information about the used codec.
1315 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1316 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1317 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1319 * - encoding: Set by user, if not then the default based on codec_id will be used.
1320 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1322 unsigned int codec_tag;
1325 * Work around bugs in encoders which sometimes cannot be detected automatically.
1326 * - encoding: Set by user
1327 * - decoding: Set by user
1329 int workaround_bugs;
1330 #define FF_BUG_AUTODETECT 1 ///< autodetection
1331 #define FF_BUG_OLD_MSMPEG4 2
1332 #define FF_BUG_XVID_ILACE 4
1333 #define FF_BUG_UMP4 8
1334 #define FF_BUG_NO_PADDING 16
1335 #define FF_BUG_AMV 32
1336 #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1337 #define FF_BUG_QPEL_CHROMA 64
1338 #define FF_BUG_STD_QPEL 128
1339 #define FF_BUG_QPEL_CHROMA2 256
1340 #define FF_BUG_DIRECT_BLOCKSIZE 512
1341 #define FF_BUG_EDGE 1024
1342 #define FF_BUG_HPEL_CHROMA 2048
1343 #define FF_BUG_DC_CLIP 4096
1344 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1345 #define FF_BUG_TRUNCATED 16384
1346 //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1349 * luma single coefficient elimination threshold
1350 * - encoding: Set by user.
1351 * - decoding: unused
1353 int luma_elim_threshold;
1356 * chroma single coeff elimination threshold
1357 * - encoding: Set by user.
1358 * - decoding: unused
1360 int chroma_elim_threshold;
1363 * strictly follow the standard (MPEG4, ...).
1364 * - encoding: Set by user.
1365 * - decoding: Set by user.
1366 * Setting this to STRICT or higher means the encoder and decoder will
1367 * generally do stupid things, whereas setting it to unofficial or lower
1368 * will mean the encoder might produce output that is not supported by all
1369 * spec-compliant decoders. Decoders don't differentiate between normal,
1370 * unofficial and experimental (that is, they always try to decode things
1371 * when they can) unless they are explicitly asked to behave stupidly
1372 * (=strictly conform to the specs)
1374 int strict_std_compliance;
1375 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
1376 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
1377 #define FF_COMPLIANCE_NORMAL 0
1378 #if LIBAVCODEC_VERSION_MAJOR < 53
1379 #define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1381 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
1382 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1385 * qscale offset between IP and B-frames
1386 * - encoding: Set by user.
1387 * - decoding: unused
1389 float b_quant_offset;
1392 * Error recognization; higher values will detect more errors but may
1393 * misdetect some more or less valid parts as errors.
1394 * - encoding: unused
1395 * - decoding: Set by user.
1397 int error_recognition;
1398 #define FF_ER_CAREFUL 1
1399 #define FF_ER_COMPLIANT 2
1400 #define FF_ER_AGGRESSIVE 3
1401 #define FF_ER_VERY_AGGRESSIVE 4
1404 * Called at the beginning of each frame to get a buffer for it.
1405 * If pic.reference is set then the frame will be read later by libavcodec.
1406 * avcodec_align_dimensions2() should be used to find the required width and
1407 * height, as they normally need to be rounded up to the next multiple of 16.
1408 * if CODEC_CAP_DR1 is not set then get_buffer() must call
1409 * avcodec_default_get_buffer() instead of providing buffers allocated by
1411 * - encoding: unused
1412 * - decoding: Set by libavcodec, user can override.
1414 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1417 * Called to release buffers which were allocated with get_buffer.
1418 * A released buffer can be reused in get_buffer().
1419 * pic.data[*] must be set to NULL.
1420 * - encoding: unused
1421 * - decoding: Set by libavcodec, user can override.
1423 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1426 * Size of the frame reordering buffer in the decoder.
1427 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1428 * - encoding: Set by libavcodec.
1429 * - decoding: Set by libavcodec.
1434 * number of bytes per packet if constant and known or 0
1435 * Used by some WAV based audio codecs.
1439 int parse_only; /* - decoding only: If true, only parsing is done
1440 (function avcodec_parse_frame()). The frame
1441 data is returned. Only MPEG codecs support this now. */
1444 * 0-> h263 quant 1-> mpeg quant
1445 * - encoding: Set by user.
1446 * - decoding: unused
1451 * pass1 encoding statistics output buffer
1452 * - encoding: Set by libavcodec.
1453 * - decoding: unused
1458 * pass2 encoding statistics input buffer
1459 * Concatenated stuff from stats_out of pass1 should be placed here.
1460 * - encoding: Allocated/set/freed by user.
1461 * - decoding: unused
1466 * ratecontrol qmin qmax limiting method
1467 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1468 * - encoding: Set by user.
1469 * - decoding: unused
1477 * ratecontrol override, see RcOverride
1478 * - encoding: Allocated/set/freed by user.
1479 * - decoding: unused
1481 RcOverride *rc_override;
1482 int rc_override_count;
1485 * rate control equation
1486 * - encoding: Set by user
1487 * - decoding: unused
1493 * - encoding: Set by user.
1494 * - decoding: unused
1500 * - encoding: Set by user.
1501 * - decoding: unused
1506 * decoder bitstream buffer size
1507 * - encoding: Set by user.
1508 * - decoding: unused
1511 float rc_buffer_aggressivity;
1514 * qscale factor between P and I-frames
1515 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1516 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1517 * - encoding: Set by user.
1518 * - decoding: unused
1520 float i_quant_factor;
1523 * qscale offset between P and I-frames
1524 * - encoding: Set by user.
1525 * - decoding: unused
1527 float i_quant_offset;
1530 * initial complexity for pass1 ratecontrol
1531 * - encoding: Set by user.
1532 * - decoding: unused
1534 float rc_initial_cplx;
1537 * DCT algorithm, see FF_DCT_* below
1538 * - encoding: Set by user.
1539 * - decoding: unused
1542 #define FF_DCT_AUTO 0
1543 #define FF_DCT_FASTINT 1
1544 #define FF_DCT_INT 2
1545 #define FF_DCT_MMX 3
1546 #define FF_DCT_MLIB 4
1547 #define FF_DCT_ALTIVEC 5
1548 #define FF_DCT_FAAN 6
1551 * luminance masking (0-> disabled)
1552 * - encoding: Set by user.
1553 * - decoding: unused
1558 * temporary complexity masking (0-> disabled)
1559 * - encoding: Set by user.
1560 * - decoding: unused
1562 float temporal_cplx_masking;
1565 * spatial complexity masking (0-> disabled)
1566 * - encoding: Set by user.
1567 * - decoding: unused
1569 float spatial_cplx_masking;
1572 * p block masking (0-> disabled)
1573 * - encoding: Set by user.
1574 * - decoding: unused
1579 * darkness masking (0-> disabled)
1580 * - encoding: Set by user.
1581 * - decoding: unused
1586 * IDCT algorithm, see FF_IDCT_* below.
1587 * - encoding: Set by user.
1588 * - decoding: Set by user.
1591 #define FF_IDCT_AUTO 0
1592 #define FF_IDCT_INT 1
1593 #define FF_IDCT_SIMPLE 2
1594 #define FF_IDCT_SIMPLEMMX 3
1595 #define FF_IDCT_LIBMPEG2MMX 4
1596 #define FF_IDCT_PS2 5
1597 #define FF_IDCT_MLIB 6
1598 #define FF_IDCT_ARM 7
1599 #define FF_IDCT_ALTIVEC 8
1600 #define FF_IDCT_SH4 9
1601 #define FF_IDCT_SIMPLEARM 10
1602 #define FF_IDCT_H264 11
1603 #define FF_IDCT_VP3 12
1604 #define FF_IDCT_IPP 13
1605 #define FF_IDCT_XVIDMMX 14
1606 #define FF_IDCT_CAVS 15
1607 #define FF_IDCT_SIMPLEARMV5TE 16
1608 #define FF_IDCT_SIMPLEARMV6 17
1609 #define FF_IDCT_SIMPLEVIS 18
1610 #define FF_IDCT_WMV2 19
1611 #define FF_IDCT_FAAN 20
1612 #define FF_IDCT_EA 21
1613 #define FF_IDCT_SIMPLENEON 22
1614 #define FF_IDCT_SIMPLEALPHA 23
1615 #define FF_IDCT_BINK 24
1619 * - encoding: Set by libavcodec.
1620 * - decoding: Set by user (or 0).
1624 * slice offsets in the frame in bytes
1625 * - encoding: Set/allocated by libavcodec.
1626 * - decoding: Set/allocated by user (or NULL).
1631 * error concealment flags
1632 * - encoding: unused
1633 * - decoding: Set by user.
1635 int error_concealment;
1636 #define FF_EC_GUESS_MVS 1
1637 #define FF_EC_DEBLOCK 2
1640 * dsp_mask could be add used to disable unwanted CPU features
1641 * CPU features (i.e. MMX, SSE. ...)
1643 * With the FORCE flag you may instead enable given CPU features.
1644 * (Dangerous: Usable in case of misdetection, improper usage however will
1645 * result into program crash.)
1648 #define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
1649 /* lower 16 bits - CPU features */
1650 #define FF_MM_MMX 0x0001 ///< standard MMX
1651 #define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1652 #if LIBAVCODEC_VERSION_MAJOR < 53
1653 #define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1655 #define FF_MM_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
1656 #define FF_MM_SSE 0x0008 ///< SSE functions
1657 #define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1658 #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1659 #define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1660 #define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1661 #define FF_MM_SSE4 0x0100 ///< Penryn SSE4.1 functions
1662 #define FF_MM_SSE42 0x0200 ///< Nehalem SSE4.2 functions
1663 #define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
1664 #define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
1667 * bits per sample/pixel from the demuxer (needed for huffyuv).
1668 * - encoding: Set by libavcodec.
1669 * - decoding: Set by user.
1671 int bits_per_coded_sample;
1674 * prediction method (needed for huffyuv)
1675 * - encoding: Set by user.
1676 * - decoding: unused
1678 int prediction_method;
1679 #define FF_PRED_LEFT 0
1680 #define FF_PRED_PLANE 1
1681 #define FF_PRED_MEDIAN 2
1684 * sample aspect ratio (0 if unknown)
1685 * That is the width of a pixel divided by the height of the pixel.
1686 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1687 * - encoding: Set by user.
1688 * - decoding: Set by libavcodec.
1690 AVRational sample_aspect_ratio;
1693 * the picture in the bitstream
1694 * - encoding: Set by libavcodec.
1695 * - decoding: Set by libavcodec.
1697 AVFrame *coded_frame;
1701 * - encoding: Set by user.
1702 * - decoding: Set by user.
1705 #define FF_DEBUG_PICT_INFO 1
1706 #define FF_DEBUG_RC 2
1707 #define FF_DEBUG_BITSTREAM 4
1708 #define FF_DEBUG_MB_TYPE 8
1709 #define FF_DEBUG_QP 16
1710 #define FF_DEBUG_MV 32
1711 #define FF_DEBUG_DCT_COEFF 0x00000040
1712 #define FF_DEBUG_SKIP 0x00000080
1713 #define FF_DEBUG_STARTCODE 0x00000100
1714 #define FF_DEBUG_PTS 0x00000200
1715 #define FF_DEBUG_ER 0x00000400
1716 #define FF_DEBUG_MMCO 0x00000800
1717 #define FF_DEBUG_BUGS 0x00001000
1718 #define FF_DEBUG_VIS_QP 0x00002000
1719 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1720 #define FF_DEBUG_BUFFERS 0x00008000
1724 * - encoding: Set by user.
1725 * - decoding: Set by user.
1728 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1729 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1730 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1734 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1735 * - decoding: unused
1740 * minimum MB quantizer
1741 * - encoding: unused
1742 * - decoding: unused
1747 * maximum MB quantizer
1748 * - encoding: unused
1749 * - decoding: unused
1754 * motion estimation comparison function
1755 * - encoding: Set by user.
1756 * - decoding: unused
1760 * subpixel motion estimation comparison function
1761 * - encoding: Set by user.
1762 * - decoding: unused
1766 * macroblock comparison function (not supported yet)
1767 * - encoding: Set by user.
1768 * - decoding: unused
1772 * interlaced DCT comparison function
1773 * - encoding: Set by user.
1774 * - decoding: unused
1777 #define FF_CMP_SAD 0
1778 #define FF_CMP_SSE 1
1779 #define FF_CMP_SATD 2
1780 #define FF_CMP_DCT 3
1781 #define FF_CMP_PSNR 4
1782 #define FF_CMP_BIT 5
1784 #define FF_CMP_ZERO 7
1785 #define FF_CMP_VSAD 8
1786 #define FF_CMP_VSSE 9
1787 #define FF_CMP_NSSE 10
1788 #define FF_CMP_W53 11
1789 #define FF_CMP_W97 12
1790 #define FF_CMP_DCTMAX 13
1791 #define FF_CMP_DCT264 14
1792 #define FF_CMP_CHROMA 256
1795 * ME diamond size & shape
1796 * - encoding: Set by user.
1797 * - decoding: unused
1802 * amount of previous MV predictors (2a+1 x 2a+1 square)
1803 * - encoding: Set by user.
1804 * - decoding: unused
1806 int last_predictor_count;
1809 * prepass for motion estimation
1810 * - encoding: Set by user.
1811 * - decoding: unused
1816 * motion estimation prepass comparison function
1817 * - encoding: Set by user.
1818 * - decoding: unused
1823 * ME prepass diamond size & shape
1824 * - encoding: Set by user.
1825 * - decoding: unused
1831 * - encoding: Set by user.
1832 * - decoding: unused
1834 int me_subpel_quality;
1837 * callback to negotiate the pixelFormat
1838 * @param fmt is the list of formats which are supported by the codec,
1839 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1840 * The first is always the native one.
1841 * @return the chosen format
1842 * - encoding: unused
1843 * - decoding: Set by user, if not set the native format will be chosen.
1845 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1848 * DTG active format information (additional aspect ratio
1849 * information only used in DVB MPEG-2 transport streams)
1852 * - encoding: unused
1853 * - decoding: Set by decoder.
1855 int dtg_active_format;
1856 #define FF_DTG_AFD_SAME 8
1857 #define FF_DTG_AFD_4_3 9
1858 #define FF_DTG_AFD_16_9 10
1859 #define FF_DTG_AFD_14_9 11
1860 #define FF_DTG_AFD_4_3_SP_14_9 13
1861 #define FF_DTG_AFD_16_9_SP_14_9 14
1862 #define FF_DTG_AFD_SP_4_3 15
1865 * maximum motion estimation search range in subpel units
1866 * If 0 then no limit.
1868 * - encoding: Set by user.
1869 * - decoding: unused
1874 * intra quantizer bias
1875 * - encoding: Set by user.
1876 * - decoding: unused
1878 int intra_quant_bias;
1879 #define FF_DEFAULT_QUANT_BIAS 999999
1882 * inter quantizer bias
1883 * - encoding: Set by user.
1884 * - decoding: unused
1886 int inter_quant_bias;
1890 * - encoding: unused
1891 * - decoding: Which clrtable should be used for 8bit RGB images.
1892 * Tables have to be stored somewhere. FIXME
1897 * internal_buffer count
1898 * Don't touch, used by libavcodec default_get_buffer().
1900 int internal_buffer_count;
1904 * Don't touch, used by libavcodec default_get_buffer().
1906 void *internal_buffer;
1908 #define FF_LAMBDA_SHIFT 7
1909 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1910 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1911 #define FF_LAMBDA_MAX (256*128-1)
1913 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1915 * Global quality for codecs which cannot change it per frame.
1916 * This should be proportional to MPEG-1/2/4 qscale.
1917 * - encoding: Set by user.
1918 * - decoding: unused
1922 #define FF_CODER_TYPE_VLC 0
1923 #define FF_CODER_TYPE_AC 1
1924 #define FF_CODER_TYPE_RAW 2
1925 #define FF_CODER_TYPE_RLE 3
1926 #define FF_CODER_TYPE_DEFLATE 4
1929 * - encoding: Set by user.
1930 * - decoding: unused
1936 * - encoding: Set by user.
1937 * - decoding: unused
1943 * - encoding: unused
1944 * - decoding: Set by user.
1946 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1951 * - encoding: unused
1952 * - decoding: Set by user.
1955 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1956 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1957 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1960 * XVideo Motion Acceleration
1961 * - encoding: forbidden
1962 * - decoding: set by decoder
1964 int xvmc_acceleration;
1967 * macroblock decision mode
1968 * - encoding: Set by user.
1969 * - decoding: unused
1972 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1973 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1974 #define FF_MB_DECISION_RD 2 ///< rate distortion
1977 * custom intra quantization matrix
1978 * - encoding: Set by user, can be NULL.
1979 * - decoding: Set by libavcodec.
1981 uint16_t *intra_matrix;
1984 * custom inter quantization matrix
1985 * - encoding: Set by user, can be NULL.
1986 * - decoding: Set by libavcodec.
1988 uint16_t *inter_matrix;
1991 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1992 * This is used to work around some encoder bugs.
1993 * - encoding: unused
1994 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1996 unsigned int stream_codec_tag;
1999 * scene change detection threshold
2000 * 0 is default, larger means fewer detected scene changes.
2001 * - encoding: Set by user.
2002 * - decoding: unused
2004 int scenechange_threshold;
2007 * minimum Lagrange multipler
2008 * - encoding: Set by user.
2009 * - decoding: unused
2014 * maximum Lagrange multipler
2015 * - encoding: Set by user.
2016 * - decoding: unused
2021 * palette control structure
2022 * - encoding: ??? (no palette-enabled encoder yet)
2023 * - decoding: Set by user.
2025 struct AVPaletteControl *palctrl;
2028 * noise reduction strength
2029 * - encoding: Set by user.
2030 * - decoding: unused
2032 int noise_reduction;
2035 * Called at the beginning of a frame to get cr buffer for it.
2036 * Buffer type (size, hints) must be the same. libavcodec won't check it.
2037 * libavcodec will pass previous buffer in pic, function should return
2038 * same buffer or new buffer with old frame "painted" into it.
2039 * If pic.data[0] == NULL must behave like get_buffer().
2040 * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2041 * avcodec_default_reget_buffer() instead of providing buffers allocated by
2043 * - encoding: unused
2044 * - decoding: Set by libavcodec, user can override.
2046 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2049 * Number of bits which should be loaded into the rc buffer before decoding starts.
2050 * - encoding: Set by user.
2051 * - decoding: unused
2053 int rc_initial_buffer_occupancy;
2057 * - encoding: Set by user.
2058 * - decoding: unused
2060 int inter_threshold;
2064 * - encoding: Set by user.
2065 * - decoding: Set by user.
2070 * Simulates errors in the bitstream to test error concealment.
2071 * - encoding: Set by user.
2072 * - decoding: unused
2077 * MP3 antialias algorithm, see FF_AA_* below.
2078 * - encoding: unused
2079 * - decoding: Set by user.
2082 #define FF_AA_AUTO 0
2083 #define FF_AA_FASTINT 1 //not implemented yet
2085 #define FF_AA_FLOAT 3
2087 * quantizer noise shaping
2088 * - encoding: Set by user.
2089 * - decoding: unused
2091 int quantizer_noise_shaping;
2095 * is used to decide how many independent tasks should be passed to execute()
2096 * - encoding: Set by user.
2097 * - decoding: Set by user.
2102 * The codec may call this to execute several independent things.
2103 * It will return only after finishing all tasks.
2104 * The user may replace this with some multithreaded implementation,
2105 * the default implementation will execute the parts serially.
2106 * @param count the number of things to execute
2107 * - encoding: Set by libavcodec, user can override.
2108 * - decoding: Set by libavcodec, user can override.
2110 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2114 * Can be used by execute() to store some per AVCodecContext stuff.
2115 * - encoding: set by execute()
2116 * - decoding: set by execute()
2118 void *thread_opaque;
2121 * Motion estimation threshold below which no motion estimation is
2122 * performed, but instead the user specified motion vectors are used.
2124 * - encoding: Set by user.
2125 * - decoding: unused
2130 * Macroblock threshold below which the user specified macroblock types will be used.
2131 * - encoding: Set by user.
2132 * - decoding: unused
2137 * precision of the intra DC coefficient - 8
2138 * - encoding: Set by user.
2139 * - decoding: unused
2141 int intra_dc_precision;
2144 * noise vs. sse weight for the nsse comparsion function
2145 * - encoding: Set by user.
2146 * - decoding: unused
2151 * Number of macroblock rows at the top which are skipped.
2152 * - encoding: unused
2153 * - decoding: Set by user.
2158 * Number of macroblock rows at the bottom which are skipped.
2159 * - encoding: unused
2160 * - decoding: Set by user.
2166 * - encoding: Set by user.
2167 * - decoding: Set by libavcodec.
2170 #define FF_PROFILE_UNKNOWN -99
2172 #define FF_PROFILE_AAC_MAIN 0
2173 #define FF_PROFILE_AAC_LOW 1
2174 #define FF_PROFILE_AAC_SSR 2
2175 #define FF_PROFILE_AAC_LTP 3
2177 #define FF_PROFILE_H264_BASELINE 66
2178 #define FF_PROFILE_H264_MAIN 77
2179 #define FF_PROFILE_H264_EXTENDED 88
2180 #define FF_PROFILE_H264_HIGH 100
2181 #define FF_PROFILE_H264_HIGH_10 110
2182 #define FF_PROFILE_H264_HIGH_422 122
2183 #define FF_PROFILE_H264_HIGH_444 244
2184 #define FF_PROFILE_H264_CAVLC_444 44
2188 * - encoding: Set by user.
2189 * - decoding: Set by libavcodec.
2192 #define FF_LEVEL_UNKNOWN -99
2195 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2196 * - encoding: unused
2197 * - decoding: Set by user.
2202 * Bitstream width / height, may be different from width/height if lowres
2203 * or other things are used.
2204 * - encoding: unused
2205 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2207 int coded_width, coded_height;
2210 * frame skip threshold
2211 * - encoding: Set by user.
2212 * - decoding: unused
2214 int frame_skip_threshold;
2218 * - encoding: Set by user.
2219 * - decoding: unused
2221 int frame_skip_factor;
2224 * frame skip exponent
2225 * - encoding: Set by user.
2226 * - decoding: unused
2231 * frame skip comparison function
2232 * - encoding: Set by user.
2233 * - decoding: unused
2238 * Border processing masking, raises the quantizer for mbs on the borders
2240 * - encoding: Set by user.
2241 * - decoding: unused
2243 float border_masking;
2246 * minimum MB lagrange multipler
2247 * - encoding: Set by user.
2248 * - decoding: unused
2253 * maximum MB lagrange multipler
2254 * - encoding: Set by user.
2255 * - decoding: unused
2261 * - encoding: Set by user.
2262 * - decoding: unused
2264 int me_penalty_compensation;
2268 * - encoding: unused
2269 * - decoding: Set by user.
2271 enum AVDiscard skip_loop_filter;
2275 * - encoding: unused
2276 * - decoding: Set by user.
2278 enum AVDiscard skip_idct;
2282 * - encoding: unused
2283 * - decoding: Set by user.
2285 enum AVDiscard skip_frame;
2289 * - encoding: Set by user.
2290 * - decoding: unused
2296 * - encoding: Set by user.
2297 * - decoding: unused
2302 * constant rate factor - quality-based VBR - values ~correspond to qps
2303 * - encoding: Set by user.
2304 * - decoding: unused
2309 * constant quantization parameter rate control method
2310 * - encoding: Set by user.
2311 * - decoding: unused
2317 * - encoding: Set by user.
2318 * - decoding: unused
2323 * number of reference frames
2324 * - encoding: Set by user.
2325 * - decoding: Set by lavc.
2330 * chroma qp offset from luma
2331 * - encoding: Set by user.
2332 * - decoding: unused
2337 * Influences how often B-frames are used.
2338 * - encoding: Set by user.
2339 * - decoding: unused
2344 * trellis RD quantization
2345 * - encoding: Set by user.
2346 * - decoding: unused
2351 * Reduce fluctuations in qp (before curve compression).
2352 * - encoding: Set by user.
2353 * - decoding: unused
2355 float complexityblur;
2358 * in-loop deblocking filter alphac0 parameter
2359 * alpha is in the range -6...6
2360 * - encoding: Set by user.
2361 * - decoding: unused
2366 * in-loop deblocking filter beta parameter
2367 * beta is in the range -6...6
2368 * - encoding: Set by user.
2369 * - decoding: unused
2374 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2375 * - encoding: Set by user.
2376 * - decoding: unused
2379 #define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2380 #define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2381 #define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2382 #define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2383 #define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
2386 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2387 * - encoding: Set by user.
2388 * - decoding: unused
2393 * Audio cutoff bandwidth (0 means "automatic")
2394 * - encoding: Set by user.
2395 * - decoding: unused
2400 * Multiplied by qscale for each frame and added to scene_change_score.
2401 * - encoding: Set by user.
2402 * - decoding: unused
2404 int scenechange_factor;
2408 * Note: Value depends upon the compare function used for fullpel ME.
2409 * - encoding: Set by user.
2410 * - decoding: unused
2415 * Adjusts sensitivity of b_frame_strategy 1.
2416 * - encoding: Set by user.
2417 * - decoding: unused
2422 * - encoding: Set by user.
2423 * - decoding: unused
2425 int compression_level;
2426 #define FF_COMPRESSION_DEFAULT -1
2428 #if LIBAVCODEC_VERSION_MAJOR < 53
2430 * Sets whether to use LPC mode - used by FLAC encoder.
2431 * - encoding: Set by user.
2432 * - decoding: unused
2433 * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2439 * LPC coefficient precision - used by FLAC encoder
2440 * - encoding: Set by user.
2441 * - decoding: unused
2443 int lpc_coeff_precision;
2446 * - encoding: Set by user.
2447 * - decoding: unused
2449 int min_prediction_order;
2452 * - encoding: Set by user.
2453 * - decoding: unused
2455 int max_prediction_order;
2458 * search method for selecting prediction order
2459 * - encoding: Set by user.
2460 * - decoding: unused
2462 int prediction_order_method;
2465 * - encoding: Set by user.
2466 * - decoding: unused
2468 int min_partition_order;
2471 * - encoding: Set by user.
2472 * - decoding: unused
2474 int max_partition_order;
2477 * GOP timecode frame start number, in non drop frame format
2478 * - encoding: Set by user.
2479 * - decoding: unused
2481 int64_t timecode_frame_start;
2483 #if LIBAVCODEC_VERSION_MAJOR < 53
2485 * Decoder should decode to this many channels if it can (0 for default)
2486 * - encoding: unused
2487 * - decoding: Set by user.
2488 * @deprecated Deprecated in favor of request_channel_layout.
2490 int request_channels;
2494 * Percentage of dynamic range compression to be applied by the decoder.
2495 * The default value is 1.0, corresponding to full compression.
2496 * - encoding: unused
2497 * - decoding: Set by user.
2502 * opaque 64bit number (generally a PTS) that will be reordered and
2503 * output in AVFrame.reordered_opaque
2504 * - encoding: unused
2505 * - decoding: Set by user.
2507 int64_t reordered_opaque;
2510 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2511 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2512 * - encoding: set by user.
2513 * - decoding: set by libavcodec.
2515 int bits_per_raw_sample;
2518 * Audio channel layout.
2519 * - encoding: set by user.
2520 * - decoding: set by libavcodec.
2522 int64_t channel_layout;
2525 * Request decoder to use this channel layout if it can (0 for default)
2526 * - encoding: unused
2527 * - decoding: Set by user.
2529 int64_t request_channel_layout;
2532 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2533 * - encoding: Set by user.
2534 * - decoding: unused.
2536 float rc_max_available_vbv_use;
2539 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2540 * - encoding: Set by user.
2541 * - decoding: unused.
2543 float rc_min_vbv_overflow_use;
2546 * Hardware accelerator in use
2547 * - encoding: unused.
2548 * - decoding: Set by libavcodec
2550 struct AVHWAccel *hwaccel;
2553 * For some codecs, the time base is closer to the field rate than the frame rate.
2554 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2555 * if no telecine is used ...
2557 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2559 int ticks_per_frame;
2562 * Hardware accelerator context.
2563 * For some hardware accelerators, a global context needs to be
2564 * provided by the user. In that case, this holds display-dependent
2565 * data FFmpeg cannot instantiate itself. Please refer to the
2566 * FFmpeg HW accelerator documentation to know how to fill this
2567 * is. e.g. for VA API, this is a struct vaapi_context.
2568 * - encoding: unused
2569 * - decoding: Set by user
2571 void *hwaccel_context;
2574 * Chromaticity coordinates of the source primaries.
2575 * - encoding: Set by user
2576 * - decoding: Set by libavcodec
2578 enum AVColorPrimaries color_primaries;
2581 * Color Transfer Characteristic.
2582 * - encoding: Set by user
2583 * - decoding: Set by libavcodec
2585 enum AVColorTransferCharacteristic color_trc;
2588 * YUV colorspace type.
2589 * - encoding: Set by user
2590 * - decoding: Set by libavcodec
2592 enum AVColorSpace colorspace;
2595 * MPEG vs JPEG YUV range.
2596 * - encoding: Set by user
2597 * - decoding: Set by libavcodec
2599 enum AVColorRange color_range;
2602 * This defines the location of chroma samples.
2603 * - encoding: Set by user
2604 * - decoding: Set by libavcodec
2606 enum AVChromaLocation chroma_sample_location;
2609 * The codec may call this to execute several independent things.
2610 * It will return only after finishing all tasks.
2611 * The user may replace this with some multithreaded implementation,
2612 * the default implementation will execute the parts serially.
2613 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2614 * @param c context passed also to func
2615 * @param count the number of things to execute
2616 * @param arg2 argument passed unchanged to func
2617 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2618 * @param func function that will be called count times, with jobnr from 0 to count-1.
2619 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2620 * two instances of func executing at the same time will have the same threadnr.
2621 * @return always 0 currently, but code should handle a future improvement where when any call to func
2622 * returns < 0 no further calls to func may be done and < 0 is returned.
2623 * - encoding: Set by libavcodec, user can override.
2624 * - decoding: Set by libavcodec, user can override.
2626 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2629 * explicit P-frame weighted prediction analysis method
2631 * 1: fast blind weighting (one reference duplicate with -1 offset)
2632 * 2: smart weighting (full fade detection analysis)
2633 * - encoding: Set by user.
2634 * - decoding: unused
2636 int weighted_p_pred;
2641 * 1: Variance AQ (complexity mask)
2642 * 2: Auto-variance AQ (experimental)
2643 * - encoding: Set by user
2644 * - decoding: unused
2650 * Reduces blocking and blurring in flat and textured areas.
2651 * - encoding: Set by user
2652 * - decoding: unused
2658 * Strength of psychovisual optimization
2659 * - encoding: Set by user
2660 * - decoding: unused
2666 * Strength of psychovisual optimization
2667 * - encoding: Set by user
2668 * - decoding: unused
2674 * Number of frames for frametype and ratecontrol lookahead
2675 * - encoding: Set by user
2676 * - decoding: unused
2681 * Constant rate factor maximum
2682 * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2683 * than crf_max, even if doing so would violate VBV restrictions.
2684 * - encoding: Set by user.
2685 * - decoding: unused
2689 int log_level_offset;
2692 * Determines which LPC analysis algorithm to use.
2693 * - encoding: Set by user
2694 * - decoding: unused
2696 enum AVLPCType lpc_type;
2699 * Number of passes to use for Cholesky factorization during LPC analysis
2700 * - encoding: Set by user
2701 * - decoding: unused
2709 typedef struct AVCodec {
2711 * Name of the codec implementation.
2712 * The name is globally unique among encoders and among decoders (but an
2713 * encoder and a decoder can share the same name).
2714 * This is the primary way to find a codec from the user perspective.
2717 enum AVMediaType type;
2720 int (*init)(AVCodecContext *);
2721 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2722 int (*close)(AVCodecContext *);
2723 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2725 * Codec capabilities.
2729 struct AVCodec *next;
2732 * Will be called when seeking
2734 void (*flush)(AVCodecContext *);
2735 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2736 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2738 * Descriptive name for the codec, meant to be more human readable than name.
2739 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2741 const char *long_name;
2742 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2743 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2744 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2745 uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
2751 typedef struct AVHWAccel {
2753 * Name of the hardware accelerated codec.
2754 * The name is globally unique among encoders and among decoders (but an
2755 * encoder and a decoder can share the same name).
2760 * Type of codec implemented by the hardware accelerator.
2762 * See AVMEDIA_TYPE_xxx
2764 enum AVMediaType type;
2767 * Codec implemented by the hardware accelerator.
2774 * Supported pixel format.
2776 * Only hardware accelerated formats are supported here.
2778 enum PixelFormat pix_fmt;
2781 * Hardware accelerated codec capabilities.
2782 * see FF_HWACCEL_CODEC_CAP_*
2786 struct AVHWAccel *next;
2789 * Called at the beginning of each frame or field picture.
2791 * Meaningful frame information (codec specific) is guaranteed to
2792 * be parsed at this point. This function is mandatory.
2794 * Note that buf can be NULL along with buf_size set to 0.
2795 * Otherwise, this means the whole frame is available at this point.
2797 * @param avctx the codec context
2798 * @param buf the frame data buffer base
2799 * @param buf_size the size of the frame in bytes
2800 * @return zero if successful, a negative value otherwise
2802 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2805 * Callback for each slice.
2807 * Meaningful slice information (codec specific) is guaranteed to
2808 * be parsed at this point. This function is mandatory.
2810 * @param avctx the codec context
2811 * @param buf the slice data buffer base
2812 * @param buf_size the size of the slice in bytes
2813 * @return zero if successful, a negative value otherwise
2815 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2818 * Called at the end of each frame or field picture.
2820 * The whole picture is parsed at this point and can now be sent
2821 * to the hardware accelerator. This function is mandatory.
2823 * @param avctx the codec context
2824 * @return zero if successful, a negative value otherwise
2826 int (*end_frame)(AVCodecContext *avctx);
2829 * Size of HW accelerator private data.
2831 * Private data is allocated with av_mallocz() before
2832 * AVCodecContext.get_buffer() and deallocated after
2833 * AVCodecContext.release_buffer().
2839 * four components are given, that's all.
2840 * the last component is alpha
2842 typedef struct AVPicture {
2844 int linesize[4]; ///< number of bytes per line
2847 #if LIBAVCODEC_VERSION_MAJOR < 53
2850 * This structure defines a method for communicating palette changes
2851 * between and demuxer and a decoder.
2853 * @deprecated Use AVPacket to send palette changes instead.
2854 * This is totally broken.
2856 #define AVPALETTE_SIZE 1024
2857 #define AVPALETTE_COUNT 256
2858 typedef struct AVPaletteControl {
2860 /* Demuxer sets this to 1 to indicate the palette has changed;
2861 * decoder resets to 0. */
2862 int palette_changed;
2864 /* 4-byte ARGB palette entries, stored in native byte order; note that
2865 * the individual palette components should be on a 8-bit scale; if
2866 * the palette data comes from an IBM VGA native format, the component
2867 * data is probably 6 bits in size and needs to be scaled. */
2868 unsigned int palette[AVPALETTE_COUNT];
2870 } AVPaletteControl attribute_deprecated;
2873 enum AVSubtitleType {
2876 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2879 * Plain text, the text field must be set by the decoder and is
2880 * authoritative. ass and pict fields may contain approximations.
2885 * Formatted text, the ass field must be set by the decoder and is
2886 * authoritative. pict and text fields may contain approximations.
2891 typedef struct AVSubtitleRect {
2892 int x; ///< top left corner of pict, undefined when pict is not set
2893 int y; ///< top left corner of pict, undefined when pict is not set
2894 int w; ///< width of pict, undefined when pict is not set
2895 int h; ///< height of pict, undefined when pict is not set
2896 int nb_colors; ///< number of colors in pict, undefined when pict is not set
2899 * data+linesize for the bitmap of this subtitle.
2900 * can be set for text/ass as well once they where rendered
2903 enum AVSubtitleType type;
2905 char *text; ///< 0 terminated plain UTF-8 text
2908 * 0 terminated ASS/SSA compatible event line.
2909 * The pressentation of this is unaffected by the other values in this
2915 typedef struct AVSubtitle {
2916 uint16_t format; /* 0 = graphics */
2917 uint32_t start_display_time; /* relative to packet pts, in ms */
2918 uint32_t end_display_time; /* relative to packet pts, in ms */
2920 AVSubtitleRect **rects;
2921 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
2924 /* packet functions */
2927 * @deprecated use NULL instead
2929 attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2932 * Default packet destructor.
2934 void av_destruct_packet(AVPacket *pkt);
2937 * Initialize optional fields of a packet with default values.
2941 void av_init_packet(AVPacket *pkt);
2944 * Allocate the payload of a packet and initialize its fields with
2948 * @param size wanted payload size
2949 * @return 0 if OK, AVERROR_xxx otherwise
2951 int av_new_packet(AVPacket *pkt, int size);
2954 * Reduce packet size, correctly zeroing padding
2957 * @param size new size
2959 void av_shrink_packet(AVPacket *pkt, int size);
2962 * @warning This is a hack - the packet memory allocation stuff is broken. The
2963 * packet is allocated if it was not really allocated.
2965 int av_dup_packet(AVPacket *pkt);
2970 * @param pkt packet to free
2972 void av_free_packet(AVPacket *pkt);
2976 struct ReSampleContext;
2977 struct AVResampleContext;
2979 typedef struct ReSampleContext ReSampleContext;
2981 #if LIBAVCODEC_VERSION_MAJOR < 53
2983 * @deprecated Use av_audio_resample_init() instead.
2985 attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2986 int output_rate, int input_rate);
2989 * Initialize audio resampling context
2991 * @param output_channels number of output channels
2992 * @param input_channels number of input channels
2993 * @param output_rate output sample rate
2994 * @param input_rate input sample rate
2995 * @param sample_fmt_out requested output sample format
2996 * @param sample_fmt_in input sample format
2997 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2998 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2999 * @param linear If 1 then the used FIR filter will be linearly interpolated
3000 between the 2 closest, if 0 the closest will be used
3001 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3002 * @return allocated ReSampleContext, NULL if error occured
3004 ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3005 int output_rate, int input_rate,
3006 enum SampleFormat sample_fmt_out,
3007 enum SampleFormat sample_fmt_in,
3008 int filter_length, int log2_phase_count,
3009 int linear, double cutoff);
3011 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3012 void audio_resample_close(ReSampleContext *s);
3016 * Initialize an audio resampler.
3017 * Note, if either rate is not an integer then simply scale both rates up so they are.
3018 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3019 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3020 * @param linear If 1 then the used FIR filter will be linearly interpolated
3021 between the 2 closest, if 0 the closest will be used
3022 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3024 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3027 * Resample an array of samples using a previously configured context.
3028 * @param src an array of unconsumed samples
3029 * @param consumed the number of samples of src which have been consumed are returned here
3030 * @param src_size the number of unconsumed samples available
3031 * @param dst_size the amount of space in samples available in dst
3032 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
3033 * @return the number of samples written in dst or -1 if an error occurred
3035 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3039 * Compensate samplerate/timestamp drift. The compensation is done by changing
3040 * the resampler parameters, so no audible clicks or similar distortions occur
3041 * @param compensation_distance distance in output samples over which the compensation should be performed
3042 * @param sample_delta number of output samples which should be output less
3044 * example: av_resample_compensate(c, 10, 500)
3045 * here instead of 510 samples only 500 samples would be output
3047 * note, due to rounding the actual compensation might be slightly different,
3048 * especially if the compensation_distance is large and the in_rate used during init is small
3050 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3051 void av_resample_close(struct AVResampleContext *c);
3054 * Allocate memory for a picture. Call avpicture_free to free it.
3056 * @param picture the picture to be filled in
3057 * @param pix_fmt the format of the picture
3058 * @param width the width of the picture
3059 * @param height the height of the picture
3060 * @return zero if successful, a negative value if not
3062 int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3065 * Free a picture previously allocated by avpicture_alloc().
3067 * @param picture the AVPicture to be freed
3069 void avpicture_free(AVPicture *picture);
3072 * Fill in the AVPicture fields.
3073 * The fields of the given AVPicture are filled in by using the 'ptr' address
3074 * which points to the image data buffer. Depending on the specified picture
3075 * format, one or multiple image data pointers and line sizes will be set.
3076 * If a planar format is specified, several pointers will be set pointing to
3077 * the different picture planes and the line sizes of the different planes
3078 * will be stored in the lines_sizes array.
3079 * Call with ptr == NULL to get the required size for the ptr buffer.
3081 * @param picture AVPicture whose fields are to be filled in
3082 * @param ptr Buffer which will contain or contains the actual image data
3083 * @param pix_fmt The format in which the picture data is stored.
3084 * @param width the width of the image in pixels
3085 * @param height the height of the image in pixels
3086 * @return size of the image data in bytes
3088 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3089 enum PixelFormat pix_fmt, int width, int height);
3090 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3091 unsigned char *dest, int dest_size);
3094 * Calculate the size in bytes that a picture of the given width and height
3095 * would occupy if stored in the given picture format.
3096 * Note that this returns the size of a compact representation as generated
3097 * by avpicture_layout, which can be smaller than the size required for e.g.
3100 * @param pix_fmt the given picture format
3101 * @param width the width of the image
3102 * @param height the height of the image
3103 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3105 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3106 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3107 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3108 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3110 #if LIBAVCODEC_VERSION_MAJOR < 53
3112 * Return the pixel format corresponding to the name name.
3114 * If there is no pixel format with name name, then look for a
3115 * pixel format with the name corresponding to the native endian
3117 * For example in a little-endian system, first look for "gray16",
3118 * then for "gray16le".
3120 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3122 * @deprecated Deprecated in favor of av_get_pix_fmt().
3124 attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3128 * Return a value representing the fourCC code associated to the
3129 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3132 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3135 * Put a string representing the codec tag codec_tag in buf.
3137 * @param buf_size size in bytes of buf
3138 * @return the length of the string that would have been generated if
3139 * enough space had been available, excluding the trailing null
3141 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3143 #define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
3144 #define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
3145 #define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
3146 #define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
3147 #define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
3148 #define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3151 * Compute what kind of losses will occur when converting from one specific
3152 * pixel format to another.
3153 * When converting from one pixel format to another, information loss may occur.
3154 * For example, when converting from RGB24 to GRAY, the color information will
3155 * be lost. Similarly, other losses occur when converting from some formats to
3156 * other formats. These losses can involve loss of chroma, but also loss of
3157 * resolution, loss of color depth, loss due to the color space conversion, loss
3158 * of the alpha bits or loss due to color quantization.
3159 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3160 * which will occur when converting from one pixel format to another.
3162 * @param[in] dst_pix_fmt destination pixel format
3163 * @param[in] src_pix_fmt source pixel format
3164 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3165 * @return Combination of flags informing you what kind of losses will occur.
3167 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3171 * Find the best pixel format to convert to given a certain source pixel
3172 * format. When converting from one pixel format to another, information loss
3173 * may occur. For example, when converting from RGB24 to GRAY, the color
3174 * information will be lost. Similarly, other losses occur when converting from
3175 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3176 * the given pixel formats should be used to suffer the least amount of loss.
3177 * The pixel formats from which it chooses one, are determined by the
3178 * pix_fmt_mask parameter.
3181 * src_pix_fmt = PIX_FMT_YUV420P;
3182 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3183 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3186 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3187 * @param[in] src_pix_fmt source pixel format
3188 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3189 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3190 * @return The best pixel format to convert to or -1 if none was found.
3192 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3193 int has_alpha, int *loss_ptr);
3197 * Print in buf the string corresponding to the pixel format with
3198 * number pix_fmt, or an header if pix_fmt is negative.
3200 * @param[in] buf the buffer where to write the string
3201 * @param[in] buf_size the size of buf
3202 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
3203 * a negative value to print the corresponding header.
3204 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
3206 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3208 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
3209 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
3212 * Tell if an image really has transparent alpha values.
3213 * @return ored mask of FF_ALPHA_xxx constants
3215 int img_get_alpha_info(const AVPicture *src,
3216 enum PixelFormat pix_fmt, int width, int height);
3218 /* deinterlace a picture */
3219 /* deinterlace - if not supported return -1 */
3220 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3221 enum PixelFormat pix_fmt, int width, int height);
3223 /* external high level API */
3226 * If c is NULL, returns the first registered codec,
3227 * if c is non-NULL, returns the next registered codec after c,
3228 * or NULL if c is the last one.
3230 AVCodec *av_codec_next(AVCodec *c);
3233 * Return the LIBAVCODEC_VERSION_INT constant.
3235 unsigned avcodec_version(void);
3238 * Return the libavcodec build-time configuration.
3240 const char *avcodec_configuration(void);
3243 * Return the libavcodec license.
3245 const char *avcodec_license(void);
3248 * Initialize libavcodec.
3250 * @warning This function must be called before any other libavcodec
3253 void avcodec_init(void);
3255 #if LIBAVCODEC_VERSION_MAJOR < 53
3257 * @deprecated Deprecated in favor of avcodec_register().
3259 attribute_deprecated void register_avcodec(AVCodec *codec);
3263 * Register the codec codec and initialize libavcodec.
3265 * @see avcodec_init()
3267 void avcodec_register(AVCodec *codec);
3270 * Find a registered encoder with a matching codec ID.
3272 * @param id CodecID of the requested encoder
3273 * @return An encoder if one was found, NULL otherwise.
3275 AVCodec *avcodec_find_encoder(enum CodecID id);
3278 * Find a registered encoder with the specified name.
3280 * @param name name of the requested encoder
3281 * @return An encoder if one was found, NULL otherwise.
3283 AVCodec *avcodec_find_encoder_by_name(const char *name);
3286 * Find a registered decoder with a matching codec ID.
3288 * @param id CodecID of the requested decoder
3289 * @return A decoder if one was found, NULL otherwise.
3291 AVCodec *avcodec_find_decoder(enum CodecID id);
3294 * Find a registered decoder with the specified name.
3296 * @param name name of the requested decoder
3297 * @return A decoder if one was found, NULL otherwise.
3299 AVCodec *avcodec_find_decoder_by_name(const char *name);
3300 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3303 * Set the fields of the given AVCodecContext to default values.
3305 * @param s The AVCodecContext of which the fields should be set to default values.
3307 void avcodec_get_context_defaults(AVCodecContext *s);
3309 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3310 * we WILL change its arguments and name a few times! */
3311 void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3314 * Allocate an AVCodecContext and set its fields to default values. The
3315 * resulting struct can be deallocated by simply calling av_free().
3317 * @return An AVCodecContext filled with default values or NULL on failure.
3318 * @see avcodec_get_context_defaults
3320 AVCodecContext *avcodec_alloc_context(void);
3322 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3323 * we WILL change its arguments and name a few times! */
3324 AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3327 * Copy the settings of the source AVCodecContext into the destination
3328 * AVCodecContext. The resulting destination codec context will be
3329 * unopened, i.e. you are required to call avcodec_open() before you
3330 * can use this AVCodecContext to decode/encode video/audio data.
3332 * @param dest target codec context, should be initialized with
3333 * avcodec_alloc_context(), but otherwise uninitialized
3334 * @param src source codec context
3335 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3337 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3340 * Set the fields of the given AVFrame to default values.
3342 * @param pic The AVFrame of which the fields should be set to default values.
3344 void avcodec_get_frame_defaults(AVFrame *pic);
3347 * Allocate an AVFrame and set its fields to default values. The resulting
3348 * struct can be deallocated by simply calling av_free().
3350 * @return An AVFrame filled with default values or NULL on failure.
3351 * @see avcodec_get_frame_defaults
3353 AVFrame *avcodec_alloc_frame(void);
3355 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3356 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3357 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3360 * Return the amount of padding in pixels which the get_buffer callback must
3361 * provide around the edge of the image for codecs which do not have the
3362 * CODEC_FLAG_EMU_EDGE flag.
3364 * @return Required padding in pixels.
3366 unsigned avcodec_get_edge_width(void);
3368 * Modify width and height values so that they will result in a memory
3369 * buffer that is acceptable for the codec if you do not use any horizontal
3372 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3373 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3374 * according to avcodec_get_edge_width() before.
3376 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3378 * Modify width and height values so that they will result in a memory
3379 * buffer that is acceptable for the codec if you also ensure that all
3380 * line sizes are a multiple of the respective linesize_align[i].
3382 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3383 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3384 * according to avcodec_get_edge_width() before.
3386 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3387 int linesize_align[4]);
3390 * Check if the given dimension of a picture is valid, meaning that all
3391 * bytes of the picture can be addressed with a signed int.
3393 * @param[in] w Width of the picture.
3394 * @param[in] h Height of the picture.
3395 * @return Zero if valid, a negative value if invalid.
3397 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3398 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3400 int avcodec_thread_init(AVCodecContext *s, int thread_count);
3401 void avcodec_thread_free(AVCodecContext *s);
3402 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3403 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3404 //FIXME func typedef
3407 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3408 * function the context has to be allocated.
3410 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3411 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3412 * retrieving a codec.
3414 * @warning This function is not thread safe!
3417 * avcodec_register_all();
3418 * codec = avcodec_find_decoder(CODEC_ID_H264);
3422 * context = avcodec_alloc_context();
3424 * if (avcodec_open(context, codec) < 0)
3428 * @param avctx The context which will be set up to use the given codec.
3429 * @param codec The codec to use within the context.
3430 * @return zero on success, a negative value on error
3431 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3433 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3435 #if LIBAVCODEC_VERSION_MAJOR < 53
3437 * Decode an audio frame from buf into samples.
3438 * Wrapper function which calls avcodec_decode_audio3.
3440 * @deprecated Use avcodec_decode_audio3 instead.
3441 * @param avctx the codec context
3442 * @param[out] samples the output buffer
3443 * @param[in,out] frame_size_ptr the output buffer size in bytes
3444 * @param[in] buf the input buffer
3445 * @param[in] buf_size the input buffer size in bytes
3446 * @return On error a negative value is returned, otherwise the number of bytes
3447 * used or zero if no frame could be decompressed.
3449 attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3450 int *frame_size_ptr,
3451 const uint8_t *buf, int buf_size);
3455 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3456 * Some decoders may support multiple frames in a single AVPacket, such
3457 * decoders would then just decode the first frame. In this case,
3458 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3459 * the remaining data in order to decode the second frame etc.
3461 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3462 * decompressed frame size in bytes.
3464 * @warning You must set frame_size_ptr to the allocated size of the
3465 * output buffer before calling avcodec_decode_audio3().
3467 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3468 * the actual read bytes because some optimized bitstream readers read 32 or 64
3469 * bits at once and could read over the end.
3471 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3472 * no overreading happens for damaged MPEG streams.
3474 * @note You might have to align the input buffer avpkt->data and output buffer
3475 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3476 * necessary at all, on others it won't work at all if not aligned and on others
3477 * it will work but it will have an impact on performance.
3479 * In practice, avpkt->data should have 4 byte alignment at minimum and
3480 * samples should be 16 byte aligned unless the CPU doesn't need it
3481 * (AltiVec and SSE do).
3483 * @param avctx the codec context
3484 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3485 * @param[in,out] frame_size_ptr the output buffer size in bytes
3486 * @param[in] avpkt The input AVPacket containing the input buffer.
3487 * You can create such packet with av_init_packet() and by then setting
3488 * data and size, some decoders might in addition need other fields.
3489 * All decoders are designed to use the least fields possible though.
3490 * @return On error a negative value is returned, otherwise the number of bytes
3491 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3493 int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3494 int *frame_size_ptr,
3497 #if LIBAVCODEC_VERSION_MAJOR < 53
3499 * Decode a video frame from buf into picture.
3500 * Wrapper function which calls avcodec_decode_video2.
3502 * @deprecated Use avcodec_decode_video2 instead.
3503 * @param avctx the codec context
3504 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3505 * @param[in] buf the input buffer
3506 * @param[in] buf_size the size of the input buffer in bytes
3507 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3508 * @return On error a negative value is returned, otherwise the number of bytes
3509 * used or zero if no frame could be decompressed.
3511 attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3512 int *got_picture_ptr,
3513 const uint8_t *buf, int buf_size);
3517 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3518 * Some decoders may support multiple frames in a single AVPacket, such
3519 * decoders would then just decode the first frame.
3521 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3522 * the actual read bytes because some optimized bitstream readers read 32 or 64
3523 * bits at once and could read over the end.
3525 * @warning The end of the input buffer buf should be set to 0 to ensure that
3526 * no overreading happens for damaged MPEG streams.
3528 * @note You might have to align the input buffer avpkt->data.
3529 * The alignment requirements depend on the CPU: on some CPUs it isn't
3530 * necessary at all, on others it won't work at all if not aligned and on others
3531 * it will work but it will have an impact on performance.
3533 * In practice, avpkt->data should have 4 byte alignment at minimum.
3535 * @note Some codecs have a delay between input and output, these need to be
3536 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3538 * @param avctx the codec context
3539 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3540 * Use avcodec_alloc_frame to get an AVFrame, the codec will
3541 * allocate memory for the actual bitmap.
3542 * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3543 * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3544 * decodes and the decoder tells the user once it does not need the data anymore,
3545 * the user app can at this point free/reuse/keep the memory as it sees fit.
3547 * @param[in] avpkt The input AVpacket containing the input buffer.
3548 * You can create such packet with av_init_packet() and by then setting
3549 * data and size, some decoders might in addition need other fields like
3550 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3552 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3553 * @return On error a negative value is returned, otherwise the number of bytes
3554 * used or zero if no frame could be decompressed.
3556 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3557 int *got_picture_ptr,
3560 #if LIBAVCODEC_VERSION_MAJOR < 53
3561 /* Decode a subtitle message. Return -1 if error, otherwise return the
3562 * number of bytes used. If no subtitle could be decompressed,
3563 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3564 attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3566 const uint8_t *buf, int buf_size);
3570 * Decode a subtitle message.
3571 * Return a negative value on error, otherwise return the number of bytes used.
3572 * If no subtitle could be decompressed, got_sub_ptr is zero.
3573 * Otherwise, the subtitle is stored in *sub.
3574 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3575 * simplicity, because the performance difference is expect to be negligible
3576 * and reusing a get_buffer written for video codecs would probably perform badly
3577 * due to a potentially very different allocation pattern.
3579 * @param avctx the codec context
3580 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3581 freed with avsubtitle_free if *got_sub_ptr is set.
3582 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3583 * @param[in] avpkt The input AVPacket containing the input buffer.
3585 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3590 * Frees all allocated data in the given subtitle struct.
3592 * @param sub AVSubtitle to free.
3594 void avsubtitle_free(AVSubtitle *sub);
3596 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3598 uint8_t *buf, int buf_size);
3601 * Encode an audio frame from samples into buf.
3603 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3604 * However, for PCM audio the user will know how much space is needed
3605 * because it depends on the value passed in buf_size as described
3606 * below. In that case a lower value can be used.
3608 * @param avctx the codec context
3609 * @param[out] buf the output buffer
3610 * @param[in] buf_size the output buffer size
3611 * @param[in] samples the input buffer containing the samples
3612 * The number of samples read from this buffer is frame_size*channels,
3613 * both of which are defined in avctx.
3614 * For PCM audio the number of samples read from samples is equal to
3615 * buf_size * input_sample_size / output_sample_size.
3616 * @return On error a negative value is returned, on success zero or the number
3617 * of bytes used to encode the data read from the input buffer.
3619 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3620 const short *samples);
3623 * Encode a video frame from pict into buf.
3624 * The input picture should be
3625 * stored using a specific format, namely avctx.pix_fmt.
3627 * @param avctx the codec context
3628 * @param[out] buf the output buffer for the bitstream of encoded frame
3629 * @param[in] buf_size the size of the output buffer in bytes
3630 * @param[in] pict the input picture to encode
3631 * @return On error a negative value is returned, on success zero or the number
3632 * of bytes used from the output buffer.
3634 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3635 const AVFrame *pict);
3636 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3637 const AVSubtitle *sub);
3639 int avcodec_close(AVCodecContext *avctx);
3642 * Register all the codecs, parsers and bitstream filters which were enabled at
3643 * configuration time. If you do not call this function you can select exactly
3644 * which formats you want to support, by using the individual registration
3647 * @see avcodec_register
3648 * @see av_register_codec_parser
3649 * @see av_register_bitstream_filter
3651 void avcodec_register_all(void);
3654 * Flush buffers, should be called when seeking or when switching to a different stream.
3656 void avcodec_flush_buffers(AVCodecContext *avctx);
3658 void avcodec_default_free_buffers(AVCodecContext *s);
3660 /* misc useful functions */
3663 * Return a single letter to describe the given picture type pict_type.
3665 * @param[in] pict_type the picture type
3666 * @return A single character representing the picture type.
3668 char av_get_pict_type_char(int pict_type);
3671 * Return codec bits per sample.
3673 * @param[in] codec_id the codec
3674 * @return Number of bits per sample or zero if unknown for the given codec.
3676 int av_get_bits_per_sample(enum CodecID codec_id);
3679 * Return sample format bits per sample.
3681 * @param[in] sample_fmt the sample format
3682 * @return Number of bits per sample or zero if unknown for the given sample format.
3684 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3687 typedef struct AVCodecParserContext {
3689 struct AVCodecParser *parser;
3690 int64_t frame_offset; /* offset of the current frame */
3691 int64_t cur_offset; /* current offset
3692 (incremented by each av_parser_parse()) */
3693 int64_t next_frame_offset; /* offset of the next frame */
3695 int pict_type; /* XXX: Put it back in AVCodecContext. */
3697 * This field is used for proper frame duration computation in lavf.
3698 * It signals, how much longer the frame duration of the current frame
3699 * is compared to normal frame duration.
3701 * frame_duration = (1 + repeat_pict) * time_base
3703 * It is used by codecs like H.264 to display telecined material.
3705 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3706 int64_t pts; /* pts of the current frame */
3707 int64_t dts; /* dts of the current frame */
3712 int fetch_timestamp;
3714 #define AV_PARSER_PTS_NB 4
3715 int cur_frame_start_index;
3716 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3717 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3718 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3721 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
3722 #define PARSER_FLAG_ONCE 0x0002
3724 int64_t offset; ///< byte offset from starting packet start
3725 int64_t cur_frame_end[AV_PARSER_PTS_NB];
3728 * Set by parser to 1 for key frames and 0 for non-key frames.
3729 * It is initialized to -1, so if the parser doesn't set this flag,
3730 * old-style fallback using FF_I_TYPE picture type as key frames
3736 * Time difference in stream time base units from the pts of this
3737 * packet to the point at which the output from the decoder has converged
3738 * independent from the availability of previous frames. That is, the
3739 * frames are virtually identical no matter if decoding started from
3740 * the very first frame or from this keyframe.
3741 * Is AV_NOPTS_VALUE if unknown.
3742 * This field is not the display duration of the current frame.
3743 * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3746 * The purpose of this field is to allow seeking in streams that have no
3747 * keyframes in the conventional sense. It corresponds to the
3748 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3749 * essential for some types of subtitle streams to ensure that all
3750 * subtitles are correctly displayed after seeking.
3752 int64_t convergence_duration;
3754 // Timestamp generation support:
3756 * Synchronization point for start of timestamp generation.
3758 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3761 * For example, this corresponds to presence of H.264 buffering period
3767 * Offset of the current timestamp against last timestamp sync point in
3768 * units of AVCodecContext.time_base.
3770 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3771 * contain a valid timestamp offset.
3773 * Note that the timestamp of sync point has usually a nonzero
3774 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3775 * the next frame after timestamp sync point will be usually 1.
3777 * For example, this corresponds to H.264 cpb_removal_delay.
3779 int dts_ref_dts_delta;
3782 * Presentation delay of current frame in units of AVCodecContext.time_base.
3784 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3785 * contain valid non-negative timestamp delta (presentation time of a frame
3786 * must not lie in the past).
3788 * This delay represents the difference between decoding and presentation
3789 * time of the frame.
3791 * For example, this corresponds to H.264 dpb_output_delay.
3796 * Position of the packet in file.
3798 * Analogous to cur_frame_pts/dts
3800 int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3803 * Byte position of currently parsed frame in stream.
3808 * Previous frame byte position.
3811 } AVCodecParserContext;
3813 typedef struct AVCodecParser {
3814 int codec_ids[5]; /* several codec IDs are permitted */
3816 int (*parser_init)(AVCodecParserContext *s);
3817 int (*parser_parse)(AVCodecParserContext *s,
3818 AVCodecContext *avctx,
3819 const uint8_t **poutbuf, int *poutbuf_size,
3820 const uint8_t *buf, int buf_size);
3821 void (*parser_close)(AVCodecParserContext *s);
3822 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3823 struct AVCodecParser *next;
3826 AVCodecParser *av_parser_next(AVCodecParser *c);
3828 void av_register_codec_parser(AVCodecParser *parser);
3829 AVCodecParserContext *av_parser_init(int codec_id);
3831 #if LIBAVCODEC_VERSION_MAJOR < 53
3832 attribute_deprecated
3833 int av_parser_parse(AVCodecParserContext *s,
3834 AVCodecContext *avctx,
3835 uint8_t **poutbuf, int *poutbuf_size,
3836 const uint8_t *buf, int buf_size,
3837 int64_t pts, int64_t dts);
3843 * @param s parser context.
3844 * @param avctx codec context.
3845 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
3846 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
3847 * @param buf input buffer.
3848 * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
3849 * @param pts input presentation timestamp.
3850 * @param dts input decoding timestamp.
3851 * @param pos input byte position in stream.
3852 * @return the number of bytes of the input bitstream used.
3857 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3864 * decode_frame(data, size);
3868 int av_parser_parse2(AVCodecParserContext *s,
3869 AVCodecContext *avctx,
3870 uint8_t **poutbuf, int *poutbuf_size,
3871 const uint8_t *buf, int buf_size,
3872 int64_t pts, int64_t dts,
3875 int av_parser_change(AVCodecParserContext *s,
3876 AVCodecContext *avctx,
3877 uint8_t **poutbuf, int *poutbuf_size,
3878 const uint8_t *buf, int buf_size, int keyframe);
3879 void av_parser_close(AVCodecParserContext *s);
3882 typedef struct AVBitStreamFilterContext {
3884 struct AVBitStreamFilter *filter;
3885 AVCodecParserContext *parser;
3886 struct AVBitStreamFilterContext *next;
3887 } AVBitStreamFilterContext;
3890 typedef struct AVBitStreamFilter {
3893 int (*filter)(AVBitStreamFilterContext *bsfc,
3894 AVCodecContext *avctx, const char *args,
3895 uint8_t **poutbuf, int *poutbuf_size,
3896 const uint8_t *buf, int buf_size, int keyframe);
3897 void (*close)(AVBitStreamFilterContext *bsfc);
3898 struct AVBitStreamFilter *next;
3899 } AVBitStreamFilter;
3901 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3902 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3903 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3904 AVCodecContext *avctx, const char *args,
3905 uint8_t **poutbuf, int *poutbuf_size,
3906 const uint8_t *buf, int buf_size, int keyframe);
3907 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
3909 AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
3914 * Reallocate the given block if it is not large enough, otherwise do nothing.
3918 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3921 * Allocate a buffer, reusing the given one if large enough.
3923 * Contrary to av_fast_realloc the current buffer contents might not be
3924 * preserved and on error the old buffer is freed, thus no special
3925 * handling to avoid memleaks is necessary.
3927 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
3928 * @param size size of the buffer *ptr points to
3929 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
3930 * *size 0 if an error occurred.
3932 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size);
3935 * Copy image 'src' to 'dst'.
3937 void av_picture_copy(AVPicture *dst, const AVPicture *src,
3938 enum PixelFormat pix_fmt, int width, int height);
3941 * Crop image top and left side.
3943 int av_picture_crop(AVPicture *dst, const AVPicture *src,
3944 enum PixelFormat pix_fmt, int top_band, int left_band);
3949 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
3950 int padtop, int padbottom, int padleft, int padright, int *color);
3953 * Encode extradata length to a buffer. Used by xiph codecs.
3955 * @param s buffer to write to; must be at least (v/255+1) bytes long
3956 * @param v size of extradata in bytes
3957 * @return number of bytes written to the buffer.
3959 unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3962 * Parse str and put in width_ptr and height_ptr the detected values.
3964 * @return 0 in case of a successful parsing, a negative value otherwise
3965 * @param[in] str the string to parse: it has to be a string in the format
3966 * width x height or a valid video frame size abbreviation.
3967 * @param[in,out] width_ptr pointer to the variable which will contain the detected
3969 * @param[in,out] height_ptr pointer to the variable which will contain the detected
3970 * frame height value
3972 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
3975 * Parse str and store the detected values in *frame_rate.
3977 * @return 0 in case of a successful parsing, a negative value otherwise
3978 * @param[in] str the string to parse: it has to be a string in the format
3979 * frame_rate_num / frame_rate_den, a float number or a valid video rate abbreviation
3980 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
3983 int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
3986 * Logs a generic warning message about a missing feature. This function is
3987 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
3988 * only, and would normally not be used by applications.
3989 * @param[in] avc a pointer to an arbitrary struct of which the first field is
3990 * a pointer to an AVClass struct
3991 * @param[in] feature string containing the name of the missing feature
3992 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
3993 * If want_sample is non-zero, additional verbage will be added to the log
3994 * message which tells the user how to report samples to the development
3997 void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4000 * Log a generic warning message asking for a sample. This function is
4001 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4002 * only, and would normally not be used by applications.
4003 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4004 * a pointer to an AVClass struct
4005 * @param[in] msg string containing an optional message, or NULL if no message
4007 void av_log_ask_for_sample(void *avc, const char *msg);
4010 * Register the hardware accelerator hwaccel.
4012 void av_register_hwaccel(AVHWAccel *hwaccel);
4015 * If hwaccel is NULL, returns the first registered hardware accelerator,
4016 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4017 * after hwaccel, or NULL if hwaccel is the last one.
4019 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4023 * Lock operation used by lockmgr
4026 AV_LOCK_CREATE, ///< Create a mutex
4027 AV_LOCK_OBTAIN, ///< Lock the mutex
4028 AV_LOCK_RELEASE, ///< Unlock the mutex
4029 AV_LOCK_DESTROY, ///< Free mutex resources
4033 * Register a user provided lock manager supporting the operations
4034 * specified by AVLockOp. mutex points to a (void *) where the
4035 * lockmgr should store/get a pointer to a user allocated mutex. It's
4036 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4038 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4039 * callback during the call to av_lockmgr_register().
4040 * Thus, the application must be prepared to handle that.
4041 * If cb is set to NULL the lockmgr will be unregistered.
4042 * Also note that during unregistration the previously registered
4043 * lockmgr callback may also be invoked.
4045 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4047 #endif /* AVCODEC_AVCODEC_H */