16 #include <sys/types.h> /* size_t */
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "0.4.9-pre1"
20 #define LIBAVCODEC_BUILD 4747
22 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
23 #define LIBAVCODEC_VERSION FFMPEG_VERSION
25 #define AV_STRINGIFY(s) AV_TOSTRING(s)
26 #define AV_TOSTRING(s) #s
27 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
29 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
30 #define AV_TIME_BASE 1000000
35 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
36 CODEC_ID_MPEG2VIDEO_XVMC,
72 CODEC_ID_INTERPLAY_VIDEO,
109 /* various pcm "codecs" */
110 CODEC_ID_PCM_S16LE= 0x10000,
119 /* various adpcm codecs */
120 CODEC_ID_ADPCM_IMA_QT= 0x11000,
121 CODEC_ID_ADPCM_IMA_WAV,
122 CODEC_ID_ADPCM_IMA_DK3,
123 CODEC_ID_ADPCM_IMA_DK4,
124 CODEC_ID_ADPCM_IMA_WS,
125 CODEC_ID_ADPCM_IMA_SMJPEG,
136 CODEC_ID_AMR_NB= 0x12000,
139 /* RealAudio codecs*/
140 CODEC_ID_RA_144= 0x13000,
143 /* various DPCM codecs */
144 CODEC_ID_ROQ_DPCM= 0x14000,
145 CODEC_ID_INTERPLAY_DPCM,
149 CODEC_ID_MP2= 0x15000,
150 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
170 CODEC_ID_OGGTHEORA= 0x16000,
172 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
173 stream (only used by libavformat) */
176 /* CODEC_ID_MP3LAME is absolete */
177 #define CODEC_ID_MP3LAME CODEC_ID_MP3
180 CODEC_TYPE_UNKNOWN = -1,
187 * Pixel format. Notes:
189 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
190 * color is put together as:
191 * (A << 24) | (R << 16) | (G << 8) | B
192 * This is stored as BGRA on little endian CPU architectures and ARGB on
195 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
196 * image data is stored in AVFrame.data[0]. The palette is transported in
197 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
198 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
199 * also endian-specific). Note also that the individual RGB palette
200 * components stored in AVFrame.data[1] should be in the range 0..255.
201 * This is important as many custom PAL8 video codecs that were designed
202 * to run on the IBM VGA graphics adapter use 6-bit palette components.
205 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
206 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
207 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
208 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
209 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
210 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
211 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
212 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
213 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
214 PIX_FMT_RGB565, ///< always stored in cpu endianness
215 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
217 PIX_FMT_MONOWHITE, ///< 0 is white
218 PIX_FMT_MONOBLACK, ///< 0 is black
219 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
220 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
221 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
222 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
223 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
224 PIX_FMT_XVMC_MPEG2_IDCT,
225 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
226 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
230 /* currently unused, may be used if 24/32 bits samples ever supported */
232 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
233 SAMPLE_FMT_S32, ///< signed 32 bits
234 SAMPLE_FMT_FLT, ///< float
235 SAMPLE_FMT_DBL, ///< double
239 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
242 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
243 * this is mainly needed because some optimized bitstream readers read
244 * 32 or 64 bit at once and could read over the end<br>
245 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
246 * MPEG bitstreams could cause overread and segfault
248 #define FF_INPUT_BUFFER_PADDING_SIZE 8
251 * minimum encoding buffer size.
252 * used to avoid some checks during header writing
254 #define FF_MIN_BUFFER_SIZE 16384
256 /* motion estimation type, EPZS by default */
267 AV_ROUND_ZERO = 0, ///< round toward zero
268 AV_ROUND_INF = 1, ///< round away from zero
269 AV_ROUND_DOWN = 2, ///< round toward -infinity
270 AV_ROUND_UP = 3, ///< round toward +infinity
271 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
274 typedef struct RcOverride{
277 int qscale; // if this is 0 then quality_factor will be used instead
278 float quality_factor;
281 /* only for ME compatiblity with old apps */
282 extern int motion_estimation_method;
284 #define FF_MAX_B_FRAMES 8
287 these flags can be passed in AVCodecContext.flags before initing
288 Note: note not everything is supported yet
291 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
292 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
293 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
294 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
295 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
296 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
297 /* parent program gurantees that the input for b-frame containing streams is not written to
298 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
299 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
300 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
301 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
302 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
303 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
304 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
305 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
306 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
307 of only at frame boundaries */
308 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
309 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
310 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
311 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
312 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
313 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
314 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
315 /* Fx : Flag for h263+ extra options */
316 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
317 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
318 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
319 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
320 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
321 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
322 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
323 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
324 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
325 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
326 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
327 #define CODEC_FLAG_CLOSED_GOP 0x80000000
328 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
329 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
330 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
332 /* Unsupported options :
333 * Syntax Arithmetic coding (SAC)
334 * Reference Picture Selection
335 * Independant Segment Decoding */
337 /* codec capabilities */
339 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
341 * Codec uses get_buffer() for allocating buffers.
342 * direct rendering method 1
344 #define CODEC_CAP_DR1 0x0002
345 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
347 #define CODEC_CAP_PARSE_ONLY 0x0004
348 #define CODEC_CAP_TRUNCATED 0x0008
349 /* codec can export data for HW decoding (XvMC) */
350 #define CODEC_CAP_HWACCEL 0x0010
352 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
353 * if this is not set, the codec is guranteed to never be feeded with NULL data
355 #define CODEC_CAP_DELAY 0x0020
357 //the following defines might change, so dont expect compatibility if u use them
358 #define MB_TYPE_INTRA4x4 0x0001
359 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
360 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
361 #define MB_TYPE_16x16 0x0008
362 #define MB_TYPE_16x8 0x0010
363 #define MB_TYPE_8x16 0x0020
364 #define MB_TYPE_8x8 0x0040
365 #define MB_TYPE_INTERLACED 0x0080
366 #define MB_TYPE_DIRECT2 0x0100 //FIXME
367 #define MB_TYPE_ACPRED 0x0200
368 #define MB_TYPE_GMC 0x0400
369 #define MB_TYPE_SKIP 0x0800
370 #define MB_TYPE_P0L0 0x1000
371 #define MB_TYPE_P1L0 0x2000
372 #define MB_TYPE_P0L1 0x4000
373 #define MB_TYPE_P1L1 0x8000
374 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
375 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
376 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
377 #define MB_TYPE_QUANT 0x00010000
378 #define MB_TYPE_CBP 0x00020000
379 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
383 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
385 typedef struct AVPanScan{
388 * - encoding: set by user.
389 * - decoding: set by lavc
394 * width and height in 1/16 pel
395 * - encoding: set by user.
396 * - decoding: set by lavc
402 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
403 * - encoding: set by user.
404 * - decoding: set by lavc
406 int16_t position[3][2];
409 #define FF_COMMON_FRAME \
411 * pointer to the picture planes.\
412 * this might be different from the first allocated byte\
419 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
420 * this isnt used by lavc unless the default get/release_buffer() is used\
426 * 1 -> keyframe, 0-> not\
427 * - encoding: set by lavc\
428 * - decoding: set by lavc\
433 * picture type of the frame, see ?_TYPE below.\
434 * - encoding: set by lavc for coded_picture (and set by user for input)\
435 * - decoding: set by lavc\
440 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
441 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
442 * - encoding: MUST be set by user\
443 * - decoding: set by lavc\
448 * picture number in bitstream order.\
449 * - encoding: set by\
450 * - decoding: set by lavc\
452 int coded_picture_number;\
454 * picture number in display order.\
455 * - encoding: set by\
456 * - decoding: set by lavc\
458 int display_picture_number;\
461 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
462 * - encoding: set by lavc for coded_picture (and set by user for input)\
463 * - decoding: set by lavc\
468 * buffer age (1->was last buffer and dint change, 2->..., ...).\
469 * set to INT_MAX if the buffer has not been used yet \
470 * - encoding: unused\
471 * - decoding: MUST be set by get_buffer()\
476 * is this picture used as reference\
477 * - encoding: unused\
478 * - decoding: set by lavc (before get_buffer() call))\
484 * - encoding: unused\
485 * - decoding: set by lavc\
487 int8_t *qscale_table;\
490 * - encoding: unused\
491 * - decoding: set by lavc\
496 * mbskip_table[mb]>=1 if MB didnt change\
497 * stride= mb_width = (width+15)>>4\
498 * - encoding: unused\
499 * - decoding: set by lavc\
501 uint8_t *mbskip_table;\
504 * Motion vector table.\
507 * int mv_sample_log2= 4 - motion_subsample_log2;\
508 * int mb_width= (width+15)>>4;\
509 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
510 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
512 * - encoding: set by user\
513 * - decoding: set by lavc\
515 int16_t (*motion_val[2])[2];\
518 * Macroblock type table\
519 * mb_type_base + mb_width + 2\
520 * - encoding: set by user\
521 * - decoding: set by lavc\
526 * log2 of the size of the block which a single vector in motion_val represents: \
527 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
528 * - encoding: unused\
529 * - decoding: set by lavc\
531 uint8_t motion_subsample_log2;\
534 * for some private data of the user\
535 * - encoding: unused\
536 * - decoding: set by user\
542 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
543 * - decoding: unused\
548 * type of the buffer (to keep track of who has to dealloc data[*])\
549 * - encoding: set by the one who allocs it\
550 * - decoding: set by the one who allocs it\
551 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
556 * when decoding, this signal how much the picture must be delayed.\
557 * extra_delay = repeat_pict / (2*fps)\
558 * - encoding: unused\
559 * - decoding: set by lavc\
569 * The content of the picture is interlaced.\
570 * - encoding: set by user\
571 * - decoding: set by lavc (default 0)\
573 int interlaced_frame;\
576 * if the content is interlaced, is top field displayed first.\
577 * - encoding: set by user\
578 * - decoding: set by lavc\
580 int top_field_first;\
584 * - encoding: set by user\
585 * - decoding: set by lavc\
587 AVPanScan *pan_scan;\
590 * tell user application that palette has changed from previous frame.\
591 * - encoding: ??? (no palette-enabled encoder yet)\
592 * - decoding: set by lavc (default 0)\
594 int palette_has_changed;\
597 * Codec suggestion on buffer type if != 0\
598 * - encoding: unused\
599 * - decoding: set by lavc (before get_buffer() call))\
605 * - encoding: unused\
606 * - decoding: set by lavc\
611 * Motion referece frame index\
612 * - encoding: set by user\
613 * - decoding: set by lavc\
615 int8_t *ref_index[2];
617 #define FF_QSCALE_TYPE_MPEG1 0
618 #define FF_QSCALE_TYPE_MPEG2 1
620 #define FF_BUFFER_TYPE_INTERNAL 1
621 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
622 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
623 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
626 #define FF_I_TYPE 1 // Intra
627 #define FF_P_TYPE 2 // Predicted
628 #define FF_B_TYPE 3 // Bi-dir predicted
629 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
633 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
634 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
635 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
636 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
641 typedef struct AVFrame {
645 #define DEFAULT_FRAME_RATE_BASE 1001000
650 typedef struct AVCLASS AVClass;
652 const char* class_name;
653 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
654 or AVFormatContext, which begin with an AVClass.
655 Needed because av_log is in libavcodec and has no visibility
656 of AVIn/OutputFormat */
660 * main external api structure.
662 typedef struct AVCodecContext {
664 * Info on struct for av_log
665 * - set by avcodec_alloc_context
669 * the average bitrate.
670 * - encoding: set by user. unused for constant quantizer encoding
671 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
676 * number of bits the bitstream is allowed to diverge from the reference.
677 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
678 * - encoding: set by user. unused for constant quantizer encoding
681 int bit_rate_tolerance;
685 * - encoding: set by user.
686 * - decoding: set by user.
691 * some codecs needs additionnal format info. It is stored here
692 * - encoding: set by user.
693 * - decoding: set by lavc. (FIXME is this ok?)
698 * motion estimation algorithm used for video coding.
699 * - encoding: MUST be set by user.
705 * some codecs need / can use extra-data like huffman tables.
706 * mjpeg: huffman tables
707 * rv10: additional flags
708 * mpeg4: global headers (they can be in the bitstream or here)
709 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
710 * then extradata_size to avoid prolems if its read with the bitstream reader
711 * - encoding: set/allocated/freed by lavc.
712 * - decoding: set/allocated/freed by user.
719 * frames per sec multiplied by frame_rate_base.
720 * for variable fps this is the precission, so if the timestamps
721 * can be specified in msec precssion then this is 1000*frame_rate_base
722 * - encoding: MUST be set by user
723 * - decoding: set by lavc. 0 or the frame_rate if available
728 * picture width / height.
729 * - encoding: MUST be set by user.
730 * - decoding: set by lavc.
731 * Note, for compatibility its possible to set this instead of
732 * coded_width/height before decoding
736 #define FF_ASPECT_EXTENDED 15
739 * the number of pictures in a group of pitures, or 0 for intra_only.
740 * - encoding: set by user.
746 * pixel format, see PIX_FMT_xxx.
747 * - encoding: set by user.
748 * - decoding: set by lavc.
750 enum PixelFormat pix_fmt;
753 * Frame rate emulation. If not zero lower layer (i.e. format handler)
754 * has to read frames at native frame rate.
755 * - encoding: set by user.
756 * - decoding: unused.
761 * if non NULL, 'draw_horiz_band' is called by the libavcodec
762 * decoder to draw an horizontal band. It improve cache usage. Not
763 * all codecs can do that. You must check the codec capabilities
766 * - decoding: set by user.
767 * @param height the height of the slice
768 * @param y the y position of the slice
769 * @param type 1->top field, 2->bottom field, 3->frame
770 * @param offset offset into the AVFrame.data from which the slice should be read
772 void (*draw_horiz_band)(struct AVCodecContext *s,
773 const AVFrame *src, int offset[4],
774 int y, int type, int height);
777 int sample_rate; ///< samples per sec
781 * audio sample format.
782 * - encoding: set by user.
783 * - decoding: set by lavc.
785 enum SampleFormat sample_fmt; ///< sample format, currenly unused
787 /* the following data should not be initialized */
788 int frame_size; ///< in samples, initialized when calling 'init'
789 int frame_number; ///< audio or video frame number
790 int real_pict_num; ///< returns the real picture number of previous encoded frame
793 * number of frames the decoded output will be delayed relative to
795 * - encoding: set by lavc.
800 /* - encoding parameters */
801 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
802 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
806 * - encoding: set by user.
813 * - encoding: set by user.
819 * maximum quantizer difference etween frames.
820 * - encoding: set by user.
826 * maximum number of b frames between non b frames.
827 * note: the output will be delayed by max_b_frames+1 relative to the input
828 * - encoding: set by user.
834 * qscale factor between ip and b frames.
835 * - encoding: set by user.
838 float b_quant_factor;
840 /** obsolete FIXME remove */
842 int b_frame_strategy;
847 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
851 struct AVCodec *codec;
855 /* unused, FIXME remove*/
858 int rtp_payload_size; /* The size of the RTP payload, the coder will */
859 /* do it's best to deliver a chunk with size */
860 /* below rtp_payload_size, the chunk will start */
861 /* with a start code on some codecs like H.263 */
862 /* This doesn't take account of any particular */
863 /* headers inside the transmited RTP payload */
866 /* The RTP callcack: This function is called */
867 /* every time the encoder as a packet to send */
868 /* Depends on the encoder if the data starts */
869 /* with a Start Code (it should) H.263 does. */
870 /* mb_nb contains the number of macroblocks */
871 /* encoded in the RTP payload */
872 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
874 /* statistics, used for 2-pass encoding */
885 * number of bits used for the previously encoded frame.
886 * - encoding: set by lavc
892 * private data of the user, can be used to carry app specific stuff.
893 * - encoding: set by user
894 * - decoding: set by user
899 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
900 enum CodecID codec_id; /* see CODEC_ID_xxx */
903 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
904 * this is used to workaround some encoder bugs
905 * - encoding: set by user, if not then the default based on codec_id will be used
906 * - decoding: set by user, will be converted to upper case by lavc during init
908 unsigned int codec_tag;
911 * workaround bugs in encoders which sometimes cannot be detected automatically.
913 * - decoding: set by user
916 #define FF_BUG_AUTODETECT 1 ///< autodetection
917 #define FF_BUG_OLD_MSMPEG4 2
918 #define FF_BUG_XVID_ILACE 4
919 #define FF_BUG_UMP4 8
920 #define FF_BUG_NO_PADDING 16
921 #define FF_BUG_AMV 32
922 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
923 #define FF_BUG_QPEL_CHROMA 64
924 #define FF_BUG_STD_QPEL 128
925 #define FF_BUG_QPEL_CHROMA2 256
926 #define FF_BUG_DIRECT_BLOCKSIZE 512
927 #define FF_BUG_EDGE 1024
928 #define FF_BUG_HPEL_CHROMA 2048
929 #define FF_BUG_DC_CLIP 4096
930 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
933 * luma single coeff elimination threshold.
934 * - encoding: set by user
937 int luma_elim_threshold;
940 * chroma single coeff elimination threshold.
941 * - encoding: set by user
944 int chroma_elim_threshold;
947 * strictly follow the std (MPEG4, ...).
948 * - encoding: set by user
951 int strict_std_compliance;
954 * qscale offset between ip and b frames.
955 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
956 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
957 * - encoding: set by user.
960 float b_quant_offset;
963 * error resilience higher values will detect more errors but may missdetect
964 * some more or less valid parts as errors.
966 * - decoding: set by user
968 int error_resilience;
969 #define FF_ER_CAREFULL 1
970 #define FF_ER_COMPLIANT 2
971 #define FF_ER_AGGRESSIVE 3
972 #define FF_ER_VERY_AGGRESSIVE 4
975 * called at the beginning of each frame to get a buffer for it.
976 * if pic.reference is set then the frame will be read later by lavc
977 * avcodec_align_dimensions() should be used to find the required width and
978 * height, as they normally need to be rounded up to the next multiple of 16
980 * - decoding: set by lavc, user can override
982 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
985 * called to release buffers which where allocated with get_buffer.
986 * a released buffer can be reused in get_buffer()
987 * pic.data[*] must be set to NULL
989 * - decoding: set by lavc, user can override
991 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
994 * if 1 the stream has a 1 frame delay during decoding.
995 * - encoding: set by lavc
996 * - decoding: set by lavc
1000 int block_align; ///< used by some WAV based audio codecs
1002 int parse_only; /* - decoding only: if true, only parsing is done
1003 (function avcodec_parse_frame()). The frame
1004 data is returned. Only MPEG codecs support this now. */
1007 * 0-> h263 quant 1-> mpeg quant.
1008 * - encoding: set by user.
1009 * - decoding: unused
1014 * pass1 encoding statistics output buffer.
1015 * - encoding: set by lavc
1016 * - decoding: unused
1021 * pass2 encoding statistics input buffer.
1022 * concatenated stuff from stats_out of pass1 should be placed here
1023 * - encoding: allocated/set/freed by user
1024 * - decoding: unused
1029 * ratecontrol qmin qmax limiting method.
1030 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1031 * - encoding: set by user.
1032 * - decoding: unused
1040 * ratecontrol override, see RcOverride.
1041 * - encoding: allocated/set/freed by user.
1042 * - decoding: unused
1044 RcOverride *rc_override;
1045 int rc_override_count;
1048 * rate control equation.
1049 * - encoding: set by user
1050 * - decoding: unused
1056 * - encoding: set by user.
1057 * - decoding: unused
1063 * - encoding: set by user.
1064 * - decoding: unused
1069 * decoder bitstream buffer size.
1070 * - encoding: set by user.
1071 * - decoding: unused
1074 float rc_buffer_aggressivity;
1077 * qscale factor between p and i frames.
1078 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1079 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1080 * - encoding: set by user.
1081 * - decoding: unused
1083 float i_quant_factor;
1086 * qscale offset between p and i frames.
1087 * - encoding: set by user.
1088 * - decoding: unused
1090 float i_quant_offset;
1093 * initial complexity for pass1 ratecontrol.
1094 * - encoding: set by user.
1095 * - decoding: unused
1097 float rc_initial_cplx;
1100 * dct algorithm, see FF_DCT_* below.
1101 * - encoding: set by user
1102 * - decoding: unused
1105 #define FF_DCT_AUTO 0
1106 #define FF_DCT_FASTINT 1
1107 #define FF_DCT_INT 2
1108 #define FF_DCT_MMX 3
1109 #define FF_DCT_MLIB 4
1110 #define FF_DCT_ALTIVEC 5
1111 #define FF_DCT_FAAN 6
1114 * luminance masking (0-> disabled).
1115 * - encoding: set by user
1116 * - decoding: unused
1121 * temporary complexity masking (0-> disabled).
1122 * - encoding: set by user
1123 * - decoding: unused
1125 float temporal_cplx_masking;
1128 * spatial complexity masking (0-> disabled).
1129 * - encoding: set by user
1130 * - decoding: unused
1132 float spatial_cplx_masking;
1135 * p block masking (0-> disabled).
1136 * - encoding: set by user
1137 * - decoding: unused
1142 * darkness masking (0-> disabled).
1143 * - encoding: set by user
1144 * - decoding: unused
1149 /* for binary compatibility */
1153 * idct algorithm, see FF_IDCT_* below.
1154 * - encoding: set by user
1155 * - decoding: set by user
1158 #define FF_IDCT_AUTO 0
1159 #define FF_IDCT_INT 1
1160 #define FF_IDCT_SIMPLE 2
1161 #define FF_IDCT_SIMPLEMMX 3
1162 #define FF_IDCT_LIBMPEG2MMX 4
1163 #define FF_IDCT_PS2 5
1164 #define FF_IDCT_MLIB 6
1165 #define FF_IDCT_ARM 7
1166 #define FF_IDCT_ALTIVEC 8
1167 #define FF_IDCT_SH4 9
1168 #define FF_IDCT_SIMPLEARM 10
1169 #define FF_IDCT_H264 11
1173 * - encoding: set by lavc
1174 * - decoding: set by user (or 0)
1178 * slice offsets in the frame in bytes.
1179 * - encoding: set/allocated by lavc
1180 * - decoding: set/allocated by user (or NULL)
1185 * error concealment flags.
1186 * - encoding: unused
1187 * - decoding: set by user
1189 int error_concealment;
1190 #define FF_EC_GUESS_MVS 1
1191 #define FF_EC_DEBLOCK 2
1194 * dsp_mask could be add used to disable unwanted CPU features
1195 * CPU features (i.e. MMX, SSE. ...)
1197 * with FORCE flag you may instead enable given CPU features
1198 * (Dangerous: usable in case of misdetection, improper usage however will
1199 * result into program crash)
1202 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1203 /* lower 16 bits - CPU features */
1205 #define FF_MM_MMX 0x0001 /* standard MMX */
1206 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1207 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1208 #define FF_MM_SSE 0x0008 /* SSE functions */
1209 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1210 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1211 #endif /* HAVE_MMX */
1214 * bits per sample/pixel from the demuxer (needed for huffyuv).
1215 * - encoding: set by lavc
1216 * - decoding: set by user
1218 int bits_per_sample;
1221 * prediction method (needed for huffyuv).
1222 * - encoding: set by user
1223 * - decoding: unused
1225 int prediction_method;
1226 #define FF_PRED_LEFT 0
1227 #define FF_PRED_PLANE 1
1228 #define FF_PRED_MEDIAN 2
1231 * sample aspect ratio (0 if unknown).
1232 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1233 * - encoding: set by user.
1234 * - decoding: set by lavc.
1236 AVRational sample_aspect_ratio;
1239 * the picture in the bitstream.
1240 * - encoding: set by lavc
1241 * - decoding: set by lavc
1243 AVFrame *coded_frame;
1247 * - encoding: set by user.
1248 * - decoding: set by user.
1251 #define FF_DEBUG_PICT_INFO 1
1252 #define FF_DEBUG_RC 2
1253 #define FF_DEBUG_BITSTREAM 4
1254 #define FF_DEBUG_MB_TYPE 8
1255 #define FF_DEBUG_QP 16
1256 #define FF_DEBUG_MV 32
1257 #define FF_DEBUG_DCT_COEFF 0x00000040
1258 #define FF_DEBUG_SKIP 0x00000080
1259 #define FF_DEBUG_STARTCODE 0x00000100
1260 #define FF_DEBUG_PTS 0x00000200
1261 #define FF_DEBUG_ER 0x00000400
1262 #define FF_DEBUG_MMCO 0x00000800
1263 #define FF_DEBUG_BUGS 0x00001000
1264 #define FF_DEBUG_VIS_QP 0x00002000
1265 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1269 * - encoding: set by user.
1270 * - decoding: set by user.
1273 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1274 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1275 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1279 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1280 * - decoding: unused
1285 * minimum MB quantizer.
1286 * - encoding: unused
1287 * - decoding: unused
1292 * maximum MB quantizer.
1293 * - encoding: unused
1294 * - decoding: unused
1299 * motion estimation compare function.
1300 * - encoding: set by user.
1301 * - decoding: unused
1305 * subpixel motion estimation compare function.
1306 * - encoding: set by user.
1307 * - decoding: unused
1311 * macroblock compare function (not supported yet).
1312 * - encoding: set by user.
1313 * - decoding: unused
1317 * interlaced dct compare function
1318 * - encoding: set by user.
1319 * - decoding: unused
1322 #define FF_CMP_SAD 0
1323 #define FF_CMP_SSE 1
1324 #define FF_CMP_SATD 2
1325 #define FF_CMP_DCT 3
1326 #define FF_CMP_PSNR 4
1327 #define FF_CMP_BIT 5
1329 #define FF_CMP_ZERO 7
1330 #define FF_CMP_VSAD 8
1331 #define FF_CMP_VSSE 9
1332 #define FF_CMP_NSSE 10
1333 #define FF_CMP_W53 11
1334 #define FF_CMP_W97 12
1335 #define FF_CMP_DCTMAX 13
1336 #define FF_CMP_CHROMA 256
1339 * ME diamond size & shape.
1340 * - encoding: set by user.
1341 * - decoding: unused
1346 * amount of previous MV predictors (2a+1 x 2a+1 square).
1347 * - encoding: set by user.
1348 * - decoding: unused
1350 int last_predictor_count;
1353 * pre pass for motion estimation.
1354 * - encoding: set by user.
1355 * - decoding: unused
1360 * motion estimation pre pass compare function.
1361 * - encoding: set by user.
1362 * - decoding: unused
1367 * ME pre pass diamond size & shape.
1368 * - encoding: set by user.
1369 * - decoding: unused
1374 * subpel ME quality.
1375 * - encoding: set by user.
1376 * - decoding: unused
1378 int me_subpel_quality;
1381 * callback to negotiate the pixelFormat.
1382 * @param fmt is the list of formats which are supported by the codec,
1383 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1384 * the first is allways the native one
1385 * @return the choosen format
1386 * - encoding: unused
1387 * - decoding: set by user, if not set then the native format will always be choosen
1389 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1392 * DTG active format information (additionnal aspect ratio
1393 * information only used in DVB MPEG2 transport streams). 0 if
1396 * - encoding: unused.
1397 * - decoding: set by decoder
1399 int dtg_active_format;
1400 #define FF_DTG_AFD_SAME 8
1401 #define FF_DTG_AFD_4_3 9
1402 #define FF_DTG_AFD_16_9 10
1403 #define FF_DTG_AFD_14_9 11
1404 #define FF_DTG_AFD_4_3_SP_14_9 13
1405 #define FF_DTG_AFD_16_9_SP_14_9 14
1406 #define FF_DTG_AFD_SP_4_3 15
1409 * Maximum motion estimation search range in subpel units.
1410 * if 0 then no limit
1412 * - encoding: set by user.
1413 * - decoding: unused.
1419 * for variable fps this is 1
1420 * - encoding: set by user.
1421 * - decoding: set by lavc.
1422 * @todo move this after frame_rate
1425 int frame_rate_base;
1427 * intra quantizer bias.
1428 * - encoding: set by user.
1429 * - decoding: unused
1431 int intra_quant_bias;
1432 #define FF_DEFAULT_QUANT_BIAS 999999
1435 * inter quantizer bias.
1436 * - encoding: set by user.
1437 * - decoding: unused
1439 int inter_quant_bias;
1443 * - encoding: unused.
1444 * - decoding: which clrtable should be used for 8bit RGB images
1445 * table have to be stored somewhere FIXME
1450 * internal_buffer count.
1451 * Dont touch, used by lavc default_get_buffer()
1453 int internal_buffer_count;
1457 * Dont touch, used by lavc default_get_buffer()
1459 void *internal_buffer;
1461 #define FF_LAMBDA_SHIFT 7
1462 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1463 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1464 #define FF_LAMBDA_MAX (256*128-1)
1466 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1468 * global quality for codecs which cannot change it per frame.
1469 * this should be proportional to MPEG1/2/4 qscale.
1470 * - encoding: set by user.
1471 * - decoding: unused
1475 #define FF_CODER_TYPE_VLC 0
1476 #define FF_CODER_TYPE_AC 1
1479 * - encoding: set by user.
1480 * - decoding: unused
1486 * - encoding: set by user.
1487 * - decoding: unused
1493 * - encoding: unused
1494 * - decoding: set by user.
1497 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1498 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1499 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1502 * XVideo Motion Acceleration
1503 * - encoding: forbidden
1504 * - decoding: set by decoder
1506 int xvmc_acceleration;
1509 * macroblock decision mode
1510 * - encoding: set by user.
1511 * - decoding: unused
1514 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1515 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1516 #define FF_MB_DECISION_RD 2 ///< rate distoration
1519 * custom intra quantization matrix
1520 * - encoding: set by user, can be NULL
1521 * - decoding: set by lavc
1523 uint16_t *intra_matrix;
1526 * custom inter quantization matrix
1527 * - encoding: set by user, can be NULL
1528 * - decoding: set by lavc
1530 uint16_t *inter_matrix;
1533 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1534 * this is used to workaround some encoder bugs
1535 * - encoding: unused
1536 * - decoding: set by user, will be converted to upper case by lavc during init
1538 unsigned int stream_codec_tag;
1541 * scene change detection threshold.
1542 * 0 is default, larger means fewer detected scene changes
1543 * - encoding: set by user.
1544 * - decoding: unused
1546 int scenechange_threshold;
1549 * minimum lagrange multipler
1550 * - encoding: set by user.
1551 * - decoding: unused
1556 * maximum lagrange multipler
1557 * - encoding: set by user.
1558 * - decoding: unused
1563 * Palette control structure
1564 * - encoding: ??? (no palette-enabled encoder yet)
1565 * - decoding: set by user.
1567 struct AVPaletteControl *palctrl;
1570 * noise reduction strength
1571 * - encoding: set by user.
1572 * - decoding: unused
1574 int noise_reduction;
1577 * called at the beginning of a frame to get cr buffer for it.
1578 * buffer type (size, hints) must be the same. lavc won't check it.
1579 * lavc will pass previous buffer in pic, function should return
1580 * same buffer or new buffer with old frame "painted" into it.
1581 * if pic.data[0] == NULL must behave like get_buffer().
1582 * - encoding: unused
1583 * - decoding: set by lavc, user can override
1585 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1588 * number of bits which should be loaded into the rc buffer before decoding starts
1589 * - encoding: set by user.
1590 * - decoding: unused
1592 int rc_initial_buffer_occupancy;
1596 * - encoding: set by user.
1597 * - decoding: unused
1599 int inter_threshold;
1603 * - encoding: set by user.
1604 * - decoding: set by user.
1609 * simulates errors in the bitstream to test error concealment.
1610 * - encoding: set by user.
1611 * - decoding: unused.
1616 * MP3 antialias algorithm, see FF_AA_* below.
1617 * - encoding: unused
1618 * - decoding: set by user
1621 #define FF_AA_AUTO 0
1622 #define FF_AA_FASTINT 1 //not implemented yet
1624 #define FF_AA_FLOAT 3
1626 * Quantizer noise shaping.
1627 * - encoding: set by user
1628 * - decoding: unused
1630 int quantizer_noise_shaping;
1634 * is used to decide how many independant tasks should be passed to execute()
1635 * - encoding: set by user
1636 * - decoding: set by user
1641 * the codec may call this to execute several independant things. it will return only after
1642 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1643 * default implementation will execute the parts serially
1644 * @param count the number of things to execute
1645 * - encoding: set by lavc, user can override
1646 * - decoding: set by lavc, user can override
1648 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1652 * can be used by execute() to store some per AVCodecContext stuff.
1653 * - encoding: set by execute()
1654 * - decoding: set by execute()
1656 void *thread_opaque;
1659 * Motion estimation threshold. under which no motion estimation is
1660 * performed, but instead the user specified motion vectors are used
1662 * - encoding: set by user
1663 * - decoding: unused
1668 * Macroblock threshold. under which the user specified macroblock types will be used
1669 * - encoding: set by user
1670 * - decoding: unused
1675 * precision of the intra dc coefficient - 8.
1676 * - encoding: set by user
1677 * - decoding: unused
1679 int intra_dc_precision;
1682 * noise vs. sse weight for the nsse comparsion function.
1683 * - encoding: set by user
1684 * - decoding: unused
1689 * number of macroblock rows at the top which are skiped.
1690 * - encoding: unused
1691 * - decoding: set by user
1696 * number of macroblock rows at the bottom which are skiped.
1697 * - encoding: unused
1698 * - decoding: set by user
1704 * - encoding: set by user
1705 * - decoding: set by lavc
1708 #define FF_PROFILE_UNKNOWN -99
1712 * - encoding: set by user
1713 * - decoding: set by lavc
1716 #define FF_LEVEL_UNKNOWN -99
1719 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1720 * - encoding: unused
1721 * - decoding: set by user
1726 * bitsream width / height. may be different from width/height if lowres
1727 * or other things are used
1728 * - encoding: unused
1729 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1731 int coded_width, coded_height;
1734 * frame skip threshold
1735 * - encoding: set by user
1736 * - decoding: unused
1738 int frame_skip_threshold;
1742 * - encoding: set by user
1743 * - decoding: unused
1745 int frame_skip_factor;
1748 * frame skip exponent
1749 * - encoding: set by user
1750 * - decoding: unused
1755 * frame skip comparission function
1756 * - encoding: set by user.
1757 * - decoding: unused
1762 * border processing masking. raises the quantizer for mbs on the borders
1764 * - encoding: set by user
1765 * - decoding: unused
1767 float border_masking;
1770 * minimum MB lagrange multipler.
1771 * - encoding: set by user.
1772 * - decoding: unused
1777 * maximum MB lagrange multipler.
1778 * - encoding: set by user.
1779 * - decoding: unused
1788 typedef struct AVOption {
1789 /** options' name */
1790 const char *name; /* if name is NULL, it indicates a link to next */
1791 /** short English text help or const struct AVOption* subpointer */
1792 const char *help; // const struct AVOption* sub;
1793 /** offset to context structure where the parsed value should be stored */
1795 /** options' type */
1797 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1798 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1799 #define FF_OPT_TYPE_INT 3 ///< integer
1800 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1801 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1802 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1803 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1804 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1805 /** min value (min == max -> no limits) */
1807 /** maximum value for double/int */
1809 /** default boo [0,1]l/double/int value */
1812 * default string value (with optional semicolon delimited extra option-list
1813 * i.e. option1;option2;option3
1814 * defval might select other then first argument as default
1817 #define FF_OPT_MAX_DEPTH 10
1823 typedef struct AVCodec {
1825 enum CodecType type;
1828 int (*init)(AVCodecContext *);
1829 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1830 int (*close)(AVCodecContext *);
1831 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1832 uint8_t *buf, int buf_size);
1834 void *dummy; // FIXME remove next time we break binary compatibility
1835 struct AVCodec *next;
1836 void (*flush)(AVCodecContext *);
1837 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1838 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1842 * four components are given, that's all.
1843 * the last component is alpha
1845 typedef struct AVPicture {
1847 int linesize[4]; ///< number of bytes per line
1852 * This structure defines a method for communicating palette changes
1853 * between and demuxer and a decoder.
1855 #define AVPALETTE_SIZE 1024
1856 #define AVPALETTE_COUNT 256
1857 typedef struct AVPaletteControl {
1859 /* demuxer sets this to 1 to indicate the palette has changed;
1860 * decoder resets to 0 */
1861 int palette_changed;
1863 /* 4-byte ARGB palette entries, stored in native byte order; note that
1864 * the individual palette components should be on a 8-bit scale; if
1865 * the palette data comes from a IBM VGA native format, the component
1866 * data is probably 6 bits in size and needs to be scaled */
1867 unsigned int palette[AVPALETTE_COUNT];
1871 extern AVCodec ac3_encoder;
1872 extern AVCodec mp2_encoder;
1873 extern AVCodec mp3lame_encoder;
1874 extern AVCodec oggvorbis_encoder;
1875 extern AVCodec oggtheora_encoder;
1876 extern AVCodec faac_encoder;
1877 extern AVCodec xvid_encoder;
1878 extern AVCodec mpeg1video_encoder;
1879 extern AVCodec mpeg2video_encoder;
1880 extern AVCodec h261_encoder;
1881 extern AVCodec h263_encoder;
1882 extern AVCodec h263p_encoder;
1883 extern AVCodec flv_encoder;
1884 extern AVCodec rv10_encoder;
1885 extern AVCodec rv20_encoder;
1886 extern AVCodec dvvideo_encoder;
1887 extern AVCodec mjpeg_encoder;
1888 extern AVCodec ljpeg_encoder;
1889 extern AVCodec png_encoder;
1890 extern AVCodec ppm_encoder;
1891 extern AVCodec pgm_encoder;
1892 extern AVCodec pgmyuv_encoder;
1893 extern AVCodec pbm_encoder;
1894 extern AVCodec pam_encoder;
1895 extern AVCodec mpeg4_encoder;
1896 extern AVCodec msmpeg4v1_encoder;
1897 extern AVCodec msmpeg4v2_encoder;
1898 extern AVCodec msmpeg4v3_encoder;
1899 extern AVCodec wmv1_encoder;
1900 extern AVCodec wmv2_encoder;
1901 extern AVCodec huffyuv_encoder;
1902 extern AVCodec ffvhuff_encoder;
1903 extern AVCodec h264_encoder;
1904 extern AVCodec asv1_encoder;
1905 extern AVCodec asv2_encoder;
1906 extern AVCodec vcr1_encoder;
1907 extern AVCodec ffv1_encoder;
1908 extern AVCodec snow_encoder;
1909 extern AVCodec mdec_encoder;
1910 extern AVCodec zlib_encoder;
1911 extern AVCodec sonic_encoder;
1912 extern AVCodec sonic_ls_encoder;
1913 extern AVCodec svq1_encoder;
1914 extern AVCodec x264_encoder;
1916 extern AVCodec h263_decoder;
1917 extern AVCodec h261_decoder;
1918 extern AVCodec mpeg4_decoder;
1919 extern AVCodec msmpeg4v1_decoder;
1920 extern AVCodec msmpeg4v2_decoder;
1921 extern AVCodec msmpeg4v3_decoder;
1922 extern AVCodec wmv1_decoder;
1923 extern AVCodec wmv2_decoder;
1924 extern AVCodec vc9_decoder;
1925 extern AVCodec wmv3_decoder;
1926 extern AVCodec mpeg1video_decoder;
1927 extern AVCodec mpeg2video_decoder;
1928 extern AVCodec mpegvideo_decoder;
1929 extern AVCodec mpeg_xvmc_decoder;
1930 extern AVCodec h263i_decoder;
1931 extern AVCodec flv_decoder;
1932 extern AVCodec rv10_decoder;
1933 extern AVCodec rv20_decoder;
1934 extern AVCodec rv30_decoder;
1935 extern AVCodec rv40_decoder;
1936 extern AVCodec svq1_decoder;
1937 extern AVCodec svq3_decoder;
1938 extern AVCodec dvvideo_decoder;
1939 extern AVCodec wmav1_decoder;
1940 extern AVCodec wmav2_decoder;
1941 extern AVCodec mjpeg_decoder;
1942 extern AVCodec mjpegb_decoder;
1943 extern AVCodec sp5x_decoder;
1944 extern AVCodec png_decoder;
1945 extern AVCodec mp2_decoder;
1946 extern AVCodec mp3_decoder;
1947 extern AVCodec mp3adu_decoder;
1948 extern AVCodec mp3on4_decoder;
1949 extern AVCodec mace3_decoder;
1950 extern AVCodec mace6_decoder;
1951 extern AVCodec huffyuv_decoder;
1952 extern AVCodec ffvhuff_decoder;
1953 extern AVCodec oggvorbis_decoder;
1954 extern AVCodec oggtheora_decoder;
1955 extern AVCodec cyuv_decoder;
1956 extern AVCodec h264_decoder;
1957 extern AVCodec indeo3_decoder;
1958 extern AVCodec vp3_decoder;
1959 extern AVCodec theora_decoder;
1960 extern AVCodec amr_nb_decoder;
1961 extern AVCodec amr_nb_encoder;
1962 extern AVCodec amr_wb_encoder;
1963 extern AVCodec amr_wb_decoder;
1964 extern AVCodec aac_decoder;
1965 extern AVCodec mpeg4aac_decoder;
1966 extern AVCodec asv1_decoder;
1967 extern AVCodec asv2_decoder;
1968 extern AVCodec vcr1_decoder;
1969 extern AVCodec cljr_decoder;
1970 extern AVCodec ffv1_decoder;
1971 extern AVCodec snow_decoder;
1972 extern AVCodec fourxm_decoder;
1973 extern AVCodec mdec_decoder;
1974 extern AVCodec roq_decoder;
1975 extern AVCodec interplay_video_decoder;
1976 extern AVCodec xan_wc3_decoder;
1977 extern AVCodec rpza_decoder;
1978 extern AVCodec cinepak_decoder;
1979 extern AVCodec msrle_decoder;
1980 extern AVCodec msvideo1_decoder;
1981 extern AVCodec vqa_decoder;
1982 extern AVCodec idcin_decoder;
1983 extern AVCodec eightbps_decoder;
1984 extern AVCodec smc_decoder;
1985 extern AVCodec flic_decoder;
1986 extern AVCodec vmdvideo_decoder;
1987 extern AVCodec vmdaudio_decoder;
1988 extern AVCodec truemotion1_decoder;
1989 extern AVCodec mszh_decoder;
1990 extern AVCodec zlib_decoder;
1991 extern AVCodec ra_144_decoder;
1992 extern AVCodec ra_288_decoder;
1993 extern AVCodec roq_dpcm_decoder;
1994 extern AVCodec interplay_dpcm_decoder;
1995 extern AVCodec xan_dpcm_decoder;
1996 extern AVCodec sol_dpcm_decoder;
1997 extern AVCodec sonic_decoder;
1998 extern AVCodec qtrle_decoder;
1999 extern AVCodec flac_decoder;
2000 extern AVCodec tscc_decoder;
2001 extern AVCodec ulti_decoder;
2002 extern AVCodec qdraw_decoder;
2003 extern AVCodec xl_decoder;
2004 extern AVCodec qpeg_decoder;
2005 extern AVCodec shorten_decoder;
2006 extern AVCodec loco_decoder;
2007 extern AVCodec alac_decoder;
2010 #define PCM_CODEC(id, name) \
2011 extern AVCodec name ## _decoder; \
2012 extern AVCodec name ## _encoder
2014 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2015 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2016 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2017 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2018 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2019 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2020 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2021 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2025 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2026 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2027 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2028 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2029 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2030 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2031 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2032 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2033 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2034 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2035 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2036 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2037 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2038 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2042 /* dummy raw video codec */
2043 extern AVCodec rawvideo_encoder;
2044 extern AVCodec rawvideo_decoder;
2046 /* the following codecs use external GPL libs */
2047 extern AVCodec ac3_decoder;
2048 extern AVCodec dts_decoder;
2052 struct ReSampleContext;
2053 struct AVResampleContext;
2055 typedef struct ReSampleContext ReSampleContext;
2057 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2058 int output_rate, int input_rate);
2059 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2060 void audio_resample_close(ReSampleContext *s);
2062 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2063 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2064 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2065 void av_resample_close(struct AVResampleContext *c);
2067 /* YUV420 format is assumed ! */
2069 struct ImgReSampleContext;
2071 typedef struct ImgReSampleContext ImgReSampleContext;
2073 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2074 int input_width, int input_height);
2076 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2077 int iwidth, int iheight,
2078 int topBand, int bottomBand,
2079 int leftBand, int rightBand,
2080 int padtop, int padbottom,
2081 int padleft, int padright);
2084 void img_resample(ImgReSampleContext *s,
2085 AVPicture *output, const AVPicture *input);
2087 void img_resample_close(ImgReSampleContext *s);
2090 * Allocate memory for a picture. Call avpicture_free to free it.
2092 * @param picture the picture to be filled in.
2093 * @param pix_fmt the format of the picture.
2094 * @param width the width of the picture.
2095 * @param height the height of the picture.
2096 * @return 0 if successful, -1 if not.
2098 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2100 /* Free a picture previously allocated by avpicture_alloc. */
2101 void avpicture_free(AVPicture *picture);
2103 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2104 int pix_fmt, int width, int height);
2105 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2106 unsigned char *dest, int dest_size);
2107 int avpicture_get_size(int pix_fmt, int width, int height);
2108 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2109 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2110 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2111 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2112 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2114 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2115 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2116 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2117 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2118 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2119 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2121 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2123 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2124 int has_alpha, int *loss_ptr);
2126 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2127 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2128 int img_get_alpha_info(const AVPicture *src,
2129 int pix_fmt, int width, int height);
2131 /* convert among pixel formats */
2132 int img_convert(AVPicture *dst, int dst_pix_fmt,
2133 const AVPicture *src, int pix_fmt,
2134 int width, int height);
2136 /* deinterlace a picture */
2137 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2138 int pix_fmt, int width, int height);
2140 /* external high level API */
2142 extern AVCodec *first_avcodec;
2144 /* returns LIBAVCODEC_VERSION_INT constant */
2145 unsigned avcodec_version(void);
2146 /* returns LIBAVCODEC_BUILD constant */
2147 unsigned avcodec_build(void);
2148 void avcodec_init(void);
2150 void register_avcodec(AVCodec *format);
2151 AVCodec *avcodec_find_encoder(enum CodecID id);
2152 AVCodec *avcodec_find_encoder_by_name(const char *name);
2153 AVCodec *avcodec_find_decoder(enum CodecID id);
2154 AVCodec *avcodec_find_decoder_by_name(const char *name);
2155 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2157 void avcodec_get_context_defaults(AVCodecContext *s);
2158 AVCodecContext *avcodec_alloc_context(void);
2159 void avcodec_get_frame_defaults(AVFrame *pic);
2160 AVFrame *avcodec_alloc_frame(void);
2162 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2163 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2164 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2165 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2166 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2167 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2169 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2170 void avcodec_thread_free(AVCodecContext *s);
2171 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2172 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2173 //FIXME func typedef
2176 * opens / inits the AVCodecContext.
2179 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2181 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2182 int *frame_size_ptr,
2183 uint8_t *buf, int buf_size);
2184 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2185 int *got_picture_ptr,
2186 uint8_t *buf, int buf_size);
2187 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2189 uint8_t *buf, int buf_size);
2190 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2191 const short *samples);
2192 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2193 const AVFrame *pict);
2195 int avcodec_close(AVCodecContext *avctx);
2197 void avcodec_register_all(void);
2199 void avcodec_flush_buffers(AVCodecContext *avctx);
2201 void avcodec_default_free_buffers(AVCodecContext *s);
2203 /* misc usefull functions */
2206 * returns a single letter to describe the picture type
2208 char av_get_pict_type_char(int pict_type);
2211 * reduce a fraction.
2212 * this is usefull for framerate calculations
2213 * @param max the maximum allowed for dst_nom & dst_den
2214 * @return 1 if exact, 0 otherwise
2216 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2219 * rescale a 64bit integer with rounding to nearest.
2220 * a simple a*b/c isnt possible as it can overflow
2222 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2225 * rescale a 64bit integer with specified rounding.
2226 * a simple a*b/c isnt possible as it can overflow
2228 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2231 typedef struct AVCodecParserContext {
2233 struct AVCodecParser *parser;
2234 int64_t frame_offset; /* offset of the current frame */
2235 int64_t cur_offset; /* current offset
2236 (incremented by each av_parser_parse()) */
2237 int64_t last_frame_offset; /* offset of the last frame */
2239 int pict_type; /* XXX: put it back in AVCodecContext */
2240 int repeat_pict; /* XXX: put it back in AVCodecContext */
2241 int64_t pts; /* pts of the current frame */
2242 int64_t dts; /* dts of the current frame */
2247 int fetch_timestamp;
2249 #define AV_PARSER_PTS_NB 4
2250 int cur_frame_start_index;
2251 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2252 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2253 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2254 } AVCodecParserContext;
2256 typedef struct AVCodecParser {
2257 int codec_ids[5]; /* several codec IDs are permitted */
2259 int (*parser_init)(AVCodecParserContext *s);
2260 int (*parser_parse)(AVCodecParserContext *s,
2261 AVCodecContext *avctx,
2262 uint8_t **poutbuf, int *poutbuf_size,
2263 const uint8_t *buf, int buf_size);
2264 void (*parser_close)(AVCodecParserContext *s);
2265 struct AVCodecParser *next;
2268 extern AVCodecParser *av_first_parser;
2270 void av_register_codec_parser(AVCodecParser *parser);
2271 AVCodecParserContext *av_parser_init(int codec_id);
2272 int av_parser_parse(AVCodecParserContext *s,
2273 AVCodecContext *avctx,
2274 uint8_t **poutbuf, int *poutbuf_size,
2275 const uint8_t *buf, int buf_size,
2276 int64_t pts, int64_t dts);
2277 void av_parser_close(AVCodecParserContext *s);
2279 extern AVCodecParser mpegvideo_parser;
2280 extern AVCodecParser mpeg4video_parser;
2281 extern AVCodecParser h261_parser;
2282 extern AVCodecParser h263_parser;
2283 extern AVCodecParser h264_parser;
2284 extern AVCodecParser mjpeg_parser;
2285 extern AVCodecParser pnm_parser;
2286 extern AVCodecParser mpegaudio_parser;
2287 extern AVCodecParser ac3_parser;
2290 void *av_malloc(unsigned int size);
2291 void *av_mallocz(unsigned int size);
2292 void *av_realloc(void *ptr, unsigned int size);
2293 void av_free(void *ptr);
2294 char *av_strdup(const char *s);
2295 void av_freep(void *ptr);
2296 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2297 /* for static data only */
2298 /* call av_free_static to release all staticaly allocated tables */
2299 void av_free_static(void);
2300 void *av_mallocz_static(unsigned int size);
2301 void *av_realloc_static(void *ptr, unsigned int size);
2303 /* add by bero : in adx.c */
2304 int is_adx(const unsigned char *buf,size_t bufsize);
2306 void img_copy(AVPicture *dst, const AVPicture *src,
2307 int pix_fmt, int width, int height);
2313 #define AV_LOG_QUIET -1
2314 #define AV_LOG_ERROR 0
2315 #define AV_LOG_INFO 1
2316 #define AV_LOG_DEBUG 2
2319 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2321 extern void av_log(void*, int level, const char *fmt, ...);
2324 extern void av_vlog(void*, int level, const char *fmt, va_list);
2325 extern int av_log_get_level(void);
2326 extern void av_log_set_level(int);
2327 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2330 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2331 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2332 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2333 (((uint8_t*)(x))[1] << 16) | \
2334 (((uint8_t*)(x))[2] << 8) | \
2336 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2337 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2338 (((uint8_t*)(x))[2] << 16) | \
2339 (((uint8_t*)(x))[1] << 8) | \
2347 #endif /* AVCODEC_H */