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 4718
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,
42 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
83 CODEC_ID_INTERPLAY_VIDEO,
102 /* various pcm "codecs" */
112 /* various adpcm codecs */
113 CODEC_ID_ADPCM_IMA_QT,
114 CODEC_ID_ADPCM_IMA_WAV,
115 CODEC_ID_ADPCM_IMA_DK3,
116 CODEC_ID_ADPCM_IMA_DK4,
117 CODEC_ID_ADPCM_IMA_WS,
118 CODEC_ID_ADPCM_IMA_SMJPEG,
130 /* RealAudio codecs*/
134 /* various DPCM codecs */
136 CODEC_ID_INTERPLAY_DPCM,
141 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
142 stream (only used by libavformat) */
145 /* CODEC_ID_MP3LAME is absolete */
146 #define CODEC_ID_MP3LAME CODEC_ID_MP3
149 CODEC_TYPE_UNKNOWN = -1,
156 * Pixel format. Notes:
158 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
159 * color is put together as:
160 * (A << 24) | (R << 16) | (G << 8) | B
161 * This is stored as BGRA on little endian CPU architectures and ARGB on
164 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
165 * image data is stored in AVFrame.data[0]. The palette is transported in
166 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
167 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
168 * also endian-specific). Note also that the individual RGB palette
169 * components stored in AVFrame.data[1] should be in the range 0..255.
170 * This is important as many custom PAL8 video codecs that were designed
171 * to run on the IBM VGA graphics adapter use 6-bit palette components.
174 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
176 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
177 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
178 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
179 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
180 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
181 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
182 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
183 PIX_FMT_RGB565, ///< always stored in cpu endianness
184 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
186 PIX_FMT_MONOWHITE, ///< 0 is white
187 PIX_FMT_MONOBLACK, ///< 0 is black
188 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
189 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
190 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
191 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
192 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
193 PIX_FMT_XVMC_MPEG2_IDCT,
197 /* currently unused, may be used if 24/32 bits samples ever supported */
199 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
203 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
206 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
207 * this is mainly needed because some optimized bitstream readers read
208 * 32 or 64 bit at once and could read over the end<br>
209 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
210 * MPEG bitstreams could cause overread and segfault
212 #define FF_INPUT_BUFFER_PADDING_SIZE 8
214 /* motion estimation type, EPZS by default */
224 typedef struct RcOverride{
227 int qscale; // if this is 0 then quality_factor will be used instead
228 float quality_factor;
231 /* only for ME compatiblity with old apps */
232 extern int motion_estimation_method;
234 #define FF_MAX_B_FRAMES 8
237 these flags can be passed in AVCodecContext.flags before initing
238 Note: note not everything is supported yet
241 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
242 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
243 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
244 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
245 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
246 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
247 /* parent program gurantees that the input for b-frame containing streams is not written to
248 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
249 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
250 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
251 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
252 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
253 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
254 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
255 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
256 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
257 of only at frame boundaries */
258 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
259 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
260 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
261 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
262 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
263 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
264 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
265 /* Fx : Flag for h263+ extra options */
266 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
267 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
268 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
269 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
270 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
271 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
272 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
273 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
274 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
275 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
276 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
277 #define CODEC_FLAG_CLOSED_GOP 0x80000000
278 /* Unsupported options :
279 * Syntax Arithmetic coding (SAC)
280 * Reference Picture Selection
281 * Independant Segment Decoding */
283 /* codec capabilities */
285 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
287 * Codec uses get_buffer() for allocating buffers.
288 * direct rendering method 1
290 #define CODEC_CAP_DR1 0x0002
291 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
293 #define CODEC_CAP_PARSE_ONLY 0x0004
294 #define CODEC_CAP_TRUNCATED 0x0008
295 /* codec can export data for HW decoding (XvMC) */
296 #define CODEC_CAP_HWACCEL 0x0010
297 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
298 #define CODEC_CAP_DELAY 0x0020
300 //the following defines might change, so dont expect compatibility if u use them
301 #define MB_TYPE_INTRA4x4 0x0001
302 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
303 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
304 #define MB_TYPE_16x16 0x0008
305 #define MB_TYPE_16x8 0x0010
306 #define MB_TYPE_8x16 0x0020
307 #define MB_TYPE_8x8 0x0040
308 #define MB_TYPE_INTERLACED 0x0080
309 #define MB_TYPE_DIRECT2 0x0100 //FIXME
310 #define MB_TYPE_ACPRED 0x0200
311 #define MB_TYPE_GMC 0x0400
312 #define MB_TYPE_SKIP 0x0800
313 #define MB_TYPE_P0L0 0x1000
314 #define MB_TYPE_P1L0 0x2000
315 #define MB_TYPE_P0L1 0x4000
316 #define MB_TYPE_P1L1 0x8000
317 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
318 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
319 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
320 #define MB_TYPE_QUANT 0x00010000
321 #define MB_TYPE_CBP 0x00020000
322 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
326 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
328 typedef struct AVPanScan{
331 * - encoding: set by user.
332 * - decoding: set by lavc
337 * width and height in 1/16 pel
338 * - encoding: set by user.
339 * - decoding: set by lavc
345 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
346 * - encoding: set by user.
347 * - decoding: set by lavc
349 int16_t position[3][2];
352 #define FF_COMMON_FRAME \
354 * pointer to the picture planes.\
355 * this might be different from the first allocated byte\
362 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
363 * this isnt used by lavc unless the default get/release_buffer() is used\
369 * 1 -> keyframe, 0-> not\
370 * - encoding: set by lavc\
371 * - decoding: set by lavc\
376 * picture type of the frame, see ?_TYPE below.\
377 * - encoding: set by lavc for coded_picture (and set by user for input)\
378 * - decoding: set by lavc\
383 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
384 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
385 * - encoding: MUST be set by user\
386 * - decoding: set by lavc\
391 * picture number in bitstream order.\
392 * - encoding: set by\
393 * - decoding: set by lavc\
395 int coded_picture_number;\
397 * picture number in display order.\
398 * - encoding: set by\
399 * - decoding: set by lavc\
401 int display_picture_number;\
404 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
405 * - encoding: set by lavc for coded_picture (and set by user for input)\
406 * - decoding: set by lavc\
411 * buffer age (1->was last buffer and dint change, 2->..., ...).\
412 * set to INT_MAX if the buffer has not been used yet \
413 * - encoding: unused\
414 * - decoding: MUST be set by get_buffer()\
419 * is this picture used as reference\
420 * - encoding: unused\
421 * - decoding: set by lavc (before get_buffer() call))\
427 * - encoding: unused\
428 * - decoding: set by lavc\
430 int8_t *qscale_table;\
433 * - encoding: unused\
434 * - decoding: set by lavc\
439 * mbskip_table[mb]>=1 if MB didnt change\
440 * stride= mb_width = (width+15)>>4\
441 * - encoding: unused\
442 * - decoding: set by lavc\
444 uint8_t *mbskip_table;\
447 * Motion vector table\
448 * - encoding: set by user\
449 * - decoding: set by lavc\
451 int16_t (*motion_val[2])[2];\
454 * Macroblock type table\
455 * mb_type_base + mb_width + 2\
456 * - encoding: set by user\
457 * - decoding: set by lavc\
462 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
463 * - encoding: unused\
464 * - decoding: set by lavc\
466 uint8_t motion_subsample_log2;\
469 * for some private data of the user\
470 * - encoding: unused\
471 * - decoding: set by user\
477 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
478 * - decoding: unused\
483 * type of the buffer (to keep track of who has to dealloc data[*])\
484 * - encoding: set by the one who allocs it\
485 * - decoding: set by the one who allocs it\
486 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
491 * when decoding, this signal how much the picture must be delayed.\
492 * extra_delay = repeat_pict / (2*fps)\
493 * - encoding: unused\
494 * - decoding: set by lavc\
504 * The content of the picture is interlaced.\
505 * - encoding: set by user\
506 * - decoding: set by lavc (default 0)\
508 int interlaced_frame;\
511 * if the content is interlaced, is top field displayed first.\
512 * - encoding: set by user\
513 * - decoding: set by lavc\
515 int top_field_first;\
519 * - encoding: set by user\
520 * - decoding: set by lavc\
522 AVPanScan *pan_scan;\
525 * tell user application that palette has changed from previous frame.\
526 * - encoding: ??? (no palette-enabled encoder yet)\
527 * - decoding: set by lavc (default 0)\
529 int palette_has_changed;\
532 * Codec suggestion on buffer type if != 0\
533 * - encoding: unused\
534 * - decoding: set by lavc (before get_buffer() call))\
540 * - encoding: unused\
541 * - decoding: set by lavc\
546 * Motion referece frame index\
547 * - encoding: set by user\
548 * - decoding: set by lavc\
550 int8_t *ref_index[2];
552 #define FF_QSCALE_TYPE_MPEG1 0
553 #define FF_QSCALE_TYPE_MPEG2 1
555 #define FF_BUFFER_TYPE_INTERNAL 1
556 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
557 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
558 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
561 #define FF_I_TYPE 1 // Intra
562 #define FF_P_TYPE 2 // Predicted
563 #define FF_B_TYPE 3 // Bi-dir predicted
564 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
568 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
569 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
570 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
571 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
576 typedef struct AVFrame {
580 #define DEFAULT_FRAME_RATE_BASE 1001000
585 typedef struct AVCLASS AVClass;
587 const char* class_name;
588 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
589 or AVFormatContext, which begin with an AVClass.
590 Needed because av_log is in libavcodec and has no visibility
591 of AVIn/OutputFormat */
595 * main external api structure.
597 typedef struct AVCodecContext {
599 * Info on struct for av_log
600 * - set by avcodec_alloc_context
604 * the average bitrate.
605 * - encoding: set by user. unused for constant quantizer encoding
606 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
611 * number of bits the bitstream is allowed to diverge from the reference.
612 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
613 * - encoding: set by user. unused for constant quantizer encoding
616 int bit_rate_tolerance;
620 * - encoding: set by user.
621 * - decoding: set by user.
626 * some codecs needs additionnal format info. It is stored here
627 * - encoding: set by user.
628 * - decoding: set by lavc. (FIXME is this ok?)
633 * motion estimation algorithm used for video coding.
634 * - encoding: MUST be set by user.
640 * some codecs need / can use extra-data like huffman tables.
641 * mjpeg: huffman tables
642 * rv10: additional flags
643 * mpeg4: global headers (they can be in the bitstream or here)
644 * - encoding: set/allocated/freed by lavc.
645 * - decoding: set/allocated/freed by user.
652 * frames per sec multiplied by frame_rate_base.
653 * for variable fps this is the precission, so if the timestamps
654 * can be specified in msec precssion then this is 1000*frame_rate_base
655 * - encoding: MUST be set by user
656 * - decoding: set by lavc. 0 or the frame_rate if available
662 * - encoding: MUST be set by user.
663 * - decoding: set by user if known, codec should override / dynamically change if needed
667 #define FF_ASPECT_EXTENDED 15
670 * the number of pictures in a group of pitures, or 0 for intra_only.
671 * - encoding: set by user.
677 * pixel format, see PIX_FMT_xxx.
678 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
679 * conversion is in order. This only works for
680 * codecs with one supported pix_fmt, we should
681 * do something for a generic case as well.
682 * - decoding: set by lavc.
684 enum PixelFormat pix_fmt;
687 * Frame rate emulation. If not zero lower layer (i.e. format handler)
688 * has to read frames at native frame rate.
689 * - encoding: set by user.
690 * - decoding: unused.
695 * if non NULL, 'draw_horiz_band' is called by the libavcodec
696 * decoder to draw an horizontal band. It improve cache usage. Not
697 * all codecs can do that. You must check the codec capabilities
700 * - decoding: set by user.
701 * @param height the height of the slice
702 * @param y the y position of the slice
703 * @param type 1->top field, 2->bottom field, 3->frame
704 * @param offset offset into the AVFrame.data from which the slice should be read
706 void (*draw_horiz_band)(struct AVCodecContext *s,
707 const AVFrame *src, int offset[4],
708 int y, int type, int height);
711 int sample_rate; ///< samples per sec
713 int sample_fmt; ///< sample format, currenly unused
715 /* the following data should not be initialized */
716 int frame_size; ///< in samples, initialized when calling 'init'
717 int frame_number; ///< audio or video frame number
718 int real_pict_num; ///< returns the real picture number of previous encoded frame
721 * number of frames the decoded output will be delayed relative to
723 * - encoding: set by lavc.
728 /* - encoding parameters */
729 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
730 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
734 * - encoding: set by user.
741 * - encoding: set by user.
747 * maximum quantizer difference etween frames.
748 * - encoding: set by user.
754 * maximum number of b frames between non b frames.
755 * note: the output will be delayed by max_b_frames+1 relative to the input
756 * - encoding: set by user.
762 * qscale factor between ip and b frames.
763 * - encoding: set by user.
766 float b_quant_factor;
768 /** obsolete FIXME remove */
770 int b_frame_strategy;
775 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
779 struct AVCodec *codec;
783 /* unused, FIXME remove*/
786 int rtp_payload_size; /* The size of the RTP payload, the coder will */
787 /* do it's best to deliver a chunk with size */
788 /* below rtp_payload_size, the chunk will start */
789 /* with a start code on some codecs like H.263 */
790 /* This doesn't take account of any particular */
791 /* headers inside the transmited RTP payload */
794 /* The RTP callcack: This function is called */
795 /* every time the encoder as a packet to send */
796 /* Depends on the encoder if the data starts */
797 /* with a Start Code (it should) H.263 does */
798 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
800 /* statistics, used for 2-pass encoding */
811 * number of bits used for the previously encoded frame.
812 * - encoding: set by lavc
818 * private data of the user, can be used to carry app specific stuff.
819 * - encoding: set by user
820 * - decoding: set by user
825 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
826 enum CodecID codec_id; /* see CODEC_ID_xxx */
829 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
830 * this is used to workaround some encoder bugs
831 * - encoding: set by user, if not then the default based on codec_id will be used
832 * - decoding: set by user, will be converted to upper case by lavc during init
834 unsigned int codec_tag;
837 * workaround bugs in encoders which sometimes cannot be detected automatically.
839 * - decoding: set by user
842 #define FF_BUG_AUTODETECT 1 ///< autodetection
843 #define FF_BUG_OLD_MSMPEG4 2
844 #define FF_BUG_XVID_ILACE 4
845 #define FF_BUG_UMP4 8
846 #define FF_BUG_NO_PADDING 16
847 #define FF_BUG_AMV 32
848 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
849 #define FF_BUG_QPEL_CHROMA 64
850 #define FF_BUG_STD_QPEL 128
851 #define FF_BUG_QPEL_CHROMA2 256
852 #define FF_BUG_DIRECT_BLOCKSIZE 512
853 #define FF_BUG_EDGE 1024
854 #define FF_BUG_HPEL_CHROMA 2048
855 #define FF_BUG_DC_CLIP 4096
856 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
859 * luma single coeff elimination threshold.
860 * - encoding: set by user
863 int luma_elim_threshold;
866 * chroma single coeff elimination threshold.
867 * - encoding: set by user
870 int chroma_elim_threshold;
873 * strictly follow the std (MPEG4, ...).
874 * - encoding: set by user
877 int strict_std_compliance;
880 * qscale offset between ip and b frames.
881 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
882 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
883 * - encoding: set by user.
886 float b_quant_offset;
889 * error resilience higher values will detect more errors but may missdetect
890 * some more or less valid parts as errors.
892 * - decoding: set by user
894 int error_resilience;
895 #define FF_ER_CAREFULL 1
896 #define FF_ER_COMPLIANT 2
897 #define FF_ER_AGGRESSIVE 3
898 #define FF_ER_VERY_AGGRESSIVE 4
901 * called at the beginning of each frame to get a buffer for it.
902 * if pic.reference is set then the frame will be read later by lavc
903 * avcodec_align_dimensions() should be used to find the required width and
904 * height, as they normally need to be rounded up to the next multiple of 16
906 * - decoding: set by lavc, user can override
908 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
911 * called to release buffers which where allocated with get_buffer.
912 * a released buffer can be reused in get_buffer()
913 * pic.data[*] must be set to NULL
915 * - decoding: set by lavc, user can override
917 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
920 * if 1 the stream has a 1 frame delay during decoding.
921 * - encoding: set by lavc
922 * - decoding: set by lavc
926 int block_align; ///< used by some WAV based audio codecs
928 int parse_only; /* - decoding only: if true, only parsing is done
929 (function avcodec_parse_frame()). The frame
930 data is returned. Only MPEG codecs support this now. */
933 * 0-> h263 quant 1-> mpeg quant.
934 * - encoding: set by user.
940 * pass1 encoding statistics output buffer.
941 * - encoding: set by lavc
947 * pass2 encoding statistics input buffer.
948 * concatenated stuff from stats_out of pass1 should be placed here
949 * - encoding: allocated/set/freed by user
955 * ratecontrol qmin qmax limiting method.
956 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
957 * - encoding: set by user.
966 * ratecontrol override, see RcOverride.
967 * - encoding: allocated/set/freed by user.
970 RcOverride *rc_override;
971 int rc_override_count;
974 * rate control equation.
975 * - encoding: set by user
982 * - encoding: set by user.
989 * - encoding: set by user.
995 * decoder bitstream buffer size.
996 * - encoding: set by user.
1000 float rc_buffer_aggressivity;
1003 * qscale factor between p and i frames.
1004 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1005 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1006 * - encoding: set by user.
1007 * - decoding: unused
1009 float i_quant_factor;
1012 * qscale offset between p and i frames.
1013 * - encoding: set by user.
1014 * - decoding: unused
1016 float i_quant_offset;
1019 * initial complexity for pass1 ratecontrol.
1020 * - encoding: set by user.
1021 * - decoding: unused
1023 float rc_initial_cplx;
1026 * dct algorithm, see FF_DCT_* below.
1027 * - encoding: set by user
1028 * - decoding: unused
1031 #define FF_DCT_AUTO 0
1032 #define FF_DCT_FASTINT 1
1033 #define FF_DCT_INT 2
1034 #define FF_DCT_MMX 3
1035 #define FF_DCT_MLIB 4
1036 #define FF_DCT_ALTIVEC 5
1037 #define FF_DCT_FAAN 6
1040 * luminance masking (0-> disabled).
1041 * - encoding: set by user
1042 * - decoding: unused
1047 * temporary complexity masking (0-> disabled).
1048 * - encoding: set by user
1049 * - decoding: unused
1051 float temporal_cplx_masking;
1054 * spatial complexity masking (0-> disabled).
1055 * - encoding: set by user
1056 * - decoding: unused
1058 float spatial_cplx_masking;
1061 * p block masking (0-> disabled).
1062 * - encoding: set by user
1063 * - decoding: unused
1068 * darkness masking (0-> disabled).
1069 * - encoding: set by user
1070 * - decoding: unused
1075 /* for binary compatibility */
1079 * idct algorithm, see FF_IDCT_* below.
1080 * - encoding: set by user
1081 * - decoding: set by user
1084 #define FF_IDCT_AUTO 0
1085 #define FF_IDCT_INT 1
1086 #define FF_IDCT_SIMPLE 2
1087 #define FF_IDCT_SIMPLEMMX 3
1088 #define FF_IDCT_LIBMPEG2MMX 4
1089 #define FF_IDCT_PS2 5
1090 #define FF_IDCT_MLIB 6
1091 #define FF_IDCT_ARM 7
1092 #define FF_IDCT_ALTIVEC 8
1093 #define FF_IDCT_SH4 9
1094 #define FF_IDCT_SIMPLEARM 10
1098 * - encoding: set by lavc
1099 * - decoding: set by user (or 0)
1103 * slice offsets in the frame in bytes.
1104 * - encoding: set/allocated by lavc
1105 * - decoding: set/allocated by user (or NULL)
1110 * error concealment flags.
1111 * - encoding: unused
1112 * - decoding: set by user
1114 int error_concealment;
1115 #define FF_EC_GUESS_MVS 1
1116 #define FF_EC_DEBLOCK 2
1119 * dsp_mask could be add used to disable unwanted CPU features
1120 * CPU features (i.e. MMX, SSE. ...)
1122 * with FORCE flag you may instead enable given CPU features
1123 * (Dangerous: usable in case of misdetection, improper usage however will
1124 * result into program crash)
1127 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1128 /* lower 16 bits - CPU features */
1130 #define FF_MM_MMX 0x0001 /* standard MMX */
1131 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1132 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1133 #define FF_MM_SSE 0x0008 /* SSE functions */
1134 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1135 #endif /* HAVE_MMX */
1138 * bits per sample/pixel from the demuxer (needed for huffyuv).
1139 * - encoding: set by lavc
1140 * - decoding: set by user
1142 int bits_per_sample;
1145 * prediction method (needed for huffyuv).
1146 * - encoding: set by user
1147 * - decoding: unused
1149 int prediction_method;
1150 #define FF_PRED_LEFT 0
1151 #define FF_PRED_PLANE 1
1152 #define FF_PRED_MEDIAN 2
1155 * sample aspect ratio (0 if unknown).
1156 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1157 * - encoding: set by user.
1158 * - decoding: set by lavc.
1160 AVRational sample_aspect_ratio;
1163 * the picture in the bitstream.
1164 * - encoding: set by lavc
1165 * - decoding: set by lavc
1167 AVFrame *coded_frame;
1171 * - encoding: set by user.
1172 * - decoding: set by user.
1175 #define FF_DEBUG_PICT_INFO 1
1176 #define FF_DEBUG_RC 2
1177 #define FF_DEBUG_BITSTREAM 4
1178 #define FF_DEBUG_MB_TYPE 8
1179 #define FF_DEBUG_QP 16
1180 #define FF_DEBUG_MV 32
1181 #define FF_DEBUG_DCT_COEFF 0x00000040
1182 #define FF_DEBUG_SKIP 0x00000080
1183 #define FF_DEBUG_STARTCODE 0x00000100
1184 #define FF_DEBUG_PTS 0x00000200
1185 #define FF_DEBUG_ER 0x00000400
1186 #define FF_DEBUG_MMCO 0x00000800
1187 #define FF_DEBUG_BUGS 0x00001000
1188 #define FF_DEBUG_VIS_QP 0x00002000
1189 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1193 * - encoding: set by user.
1194 * - decoding: set by user.
1197 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1198 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1199 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1203 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1204 * - decoding: unused
1209 * minimum MB quantizer.
1210 * - encoding: set by user.
1211 * - decoding: unused
1216 * maximum MB quantizer.
1217 * - encoding: set by user.
1218 * - decoding: unused
1223 * motion estimation compare function.
1224 * - encoding: set by user.
1225 * - decoding: unused
1229 * subpixel motion estimation compare function.
1230 * - encoding: set by user.
1231 * - decoding: unused
1235 * macroblock compare function (not supported yet).
1236 * - encoding: set by user.
1237 * - decoding: unused
1241 * interlaced dct compare function
1242 * - encoding: set by user.
1243 * - decoding: unused
1246 #define FF_CMP_SAD 0
1247 #define FF_CMP_SSE 1
1248 #define FF_CMP_SATD 2
1249 #define FF_CMP_DCT 3
1250 #define FF_CMP_PSNR 4
1251 #define FF_CMP_BIT 5
1253 #define FF_CMP_ZERO 7
1254 #define FF_CMP_VSAD 8
1255 #define FF_CMP_VSSE 9
1256 #define FF_CMP_NSSE 10
1257 #define FF_CMP_CHROMA 256
1260 * ME diamond size & shape.
1261 * - encoding: set by user.
1262 * - decoding: unused
1267 * amount of previous MV predictors (2a+1 x 2a+1 square).
1268 * - encoding: set by user.
1269 * - decoding: unused
1271 int last_predictor_count;
1274 * pre pass for motion estimation.
1275 * - encoding: set by user.
1276 * - decoding: unused
1281 * motion estimation pre pass compare function.
1282 * - encoding: set by user.
1283 * - decoding: unused
1288 * ME pre pass diamond size & shape.
1289 * - encoding: set by user.
1290 * - decoding: unused
1295 * subpel ME quality.
1296 * - encoding: set by user.
1297 * - decoding: unused
1299 int me_subpel_quality;
1302 * callback to negotiate the pixelFormat.
1303 * @param fmt is the list of formats which are supported by the codec,
1304 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1305 * the first is allways the native one
1306 * @return the choosen format
1307 * - encoding: unused
1308 * - decoding: set by user, if not set then the native format will always be choosen
1310 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1313 * DTG active format information (additionnal aspect ratio
1314 * information only used in DVB MPEG2 transport streams). 0 if
1317 * - encoding: unused.
1318 * - decoding: set by decoder
1320 int dtg_active_format;
1321 #define FF_DTG_AFD_SAME 8
1322 #define FF_DTG_AFD_4_3 9
1323 #define FF_DTG_AFD_16_9 10
1324 #define FF_DTG_AFD_14_9 11
1325 #define FF_DTG_AFD_4_3_SP_14_9 13
1326 #define FF_DTG_AFD_16_9_SP_14_9 14
1327 #define FF_DTG_AFD_SP_4_3 15
1330 * Maximum motion estimation search range in subpel units.
1331 * if 0 then no limit
1333 * - encoding: set by user.
1334 * - decoding: unused.
1340 * for variable fps this is 1
1341 * - encoding: set by user.
1342 * - decoding: set by lavc.
1343 * @todo move this after frame_rate
1346 int frame_rate_base;
1348 * intra quantizer bias.
1349 * - encoding: set by user.
1350 * - decoding: unused
1352 int intra_quant_bias;
1353 #define FF_DEFAULT_QUANT_BIAS 999999
1356 * inter quantizer bias.
1357 * - encoding: set by user.
1358 * - decoding: unused
1360 int inter_quant_bias;
1364 * - encoding: unused.
1365 * - decoding: which clrtable should be used for 8bit RGB images
1366 * table have to be stored somewhere FIXME
1371 * internal_buffer count.
1372 * Dont touch, used by lavc default_get_buffer()
1374 int internal_buffer_count;
1378 * Dont touch, used by lavc default_get_buffer()
1380 void *internal_buffer;
1382 #define FF_LAMBDA_SHIFT 7
1383 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1384 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1385 #define FF_LAMBDA_MAX (256*128-1)
1387 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1389 * global quality for codecs which cannot change it per frame.
1390 * this should be proportional to MPEG1/2/4 qscale.
1391 * - encoding: set by user.
1392 * - decoding: unused
1396 #define FF_CODER_TYPE_VLC 0
1397 #define FF_CODER_TYPE_AC 1
1400 * - encoding: set by user.
1401 * - decoding: unused
1407 * - encoding: set by user.
1408 * - decoding: unused
1414 * - encoding: unused
1415 * - decoding: set by user.
1418 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1419 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1420 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1423 * XVideo Motion Acceleration
1424 * - encoding: forbidden
1425 * - decoding: set by decoder
1427 int xvmc_acceleration;
1430 * macroblock decision mode
1431 * - encoding: set by user.
1432 * - decoding: unused
1435 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1436 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1437 #define FF_MB_DECISION_RD 2 ///< rate distoration
1440 * custom intra quantization matrix
1441 * - encoding: set by user, can be NULL
1442 * - decoding: set by lavc
1444 uint16_t *intra_matrix;
1447 * custom inter quantization matrix
1448 * - encoding: set by user, can be NULL
1449 * - decoding: set by lavc
1451 uint16_t *inter_matrix;
1454 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1455 * this is used to workaround some encoder bugs
1456 * - encoding: unused
1457 * - decoding: set by user, will be converted to upper case by lavc during init
1459 unsigned int stream_codec_tag;
1462 * scene change detection threshold.
1463 * 0 is default, larger means fewer detected scene changes
1464 * - encoding: set by user.
1465 * - decoding: unused
1467 int scenechange_threshold;
1470 * minimum lagrange multipler
1471 * - encoding: set by user.
1472 * - decoding: unused
1477 * maximum lagrange multipler
1478 * - encoding: set by user.
1479 * - decoding: unused
1484 * Palette control structure
1485 * - encoding: ??? (no palette-enabled encoder yet)
1486 * - decoding: set by user.
1488 struct AVPaletteControl *palctrl;
1491 * noise reduction strength
1492 * - encoding: set by user.
1493 * - decoding: unused
1495 int noise_reduction;
1498 * called at the beginning of a frame to get cr buffer for it.
1499 * buffer type (size, hints) must be the same. lavc won't check it.
1500 * lavc will pass previous buffer in pic, function should return
1501 * same buffer or new buffer with old frame "painted" into it.
1502 * if pic.data[0] == NULL must behave like get_buffer().
1503 * - encoding: unused
1504 * - decoding: set by lavc, user can override
1506 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1509 * number of bits which should be loaded into the rc buffer before decoding starts
1510 * - encoding: set by user.
1511 * - decoding: unused
1513 int rc_initial_buffer_occupancy;
1517 * - encoding: set by user.
1518 * - decoding: unused
1520 int inter_threshold;
1524 * - encoding: set by user.
1525 * - decoding: set by user.
1530 * simulates errors in the bitstream to test error concealment.
1531 * - encoding: set by user.
1532 * - decoding: unused.
1537 * MP3 antialias algorithm, see FF_AA_* below.
1538 * - encoding: unused
1539 * - decoding: set by user
1542 #define FF_AA_AUTO 0
1543 #define FF_AA_FASTINT 1 //not implemented yet
1545 #define FF_AA_FLOAT 3
1547 * Quantizer noise shaping.
1548 * - encoding: set by user
1549 * - decoding: unused
1551 int quantizer_noise_shaping;
1555 * is used to decide how many independant tasks should be passed to execute()
1556 * - encoding: set by user
1557 * - decoding: set by user
1562 * the codec may call this to execute several independant things. it will return only after
1563 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1564 * default implementation will execute the parts serially
1565 * @param count the number of things to execute
1566 * - encoding: set by lavc, user can override
1567 * - decoding: set by lavc, user can override
1569 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1573 * can be used by execute() to store some per AVCodecContext stuff.
1574 * - encoding: set by execute()
1575 * - decoding: set by execute()
1577 void *thread_opaque;
1580 * Motion estimation threshold. under which no motion estimation is
1581 * performed, but instead the user specified motion vectors are used
1583 * - encoding: set by user
1584 * - decoding: unused
1589 * Macroblock threshold. under which the user specified macroblock types will be used
1590 * - encoding: set by user
1591 * - decoding: unused
1596 * precision of the intra dc coefficient - 8.
1597 * - encoding: set by user
1598 * - decoding: unused
1600 int intra_dc_precision;
1603 * noise vs. sse weight for the nsse comparsion function.
1604 * - encoding: set by user
1605 * - decoding: unused
1610 * number of macroblock rows at the top which are skiped.
1611 * - encoding: unused
1612 * - decoding: set by user
1617 * number of macroblock rows at the bottom which are skiped.
1618 * - encoding: unused
1619 * - decoding: set by user
1628 typedef struct AVOption {
1629 /** options' name */
1630 const char *name; /* if name is NULL, it indicates a link to next */
1631 /** short English text help or const struct AVOption* subpointer */
1632 const char *help; // const struct AVOption* sub;
1633 /** offset to context structure where the parsed value should be stored */
1635 /** options' type */
1637 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1638 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1639 #define FF_OPT_TYPE_INT 3 ///< integer
1640 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1641 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1642 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1643 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1644 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1645 /** min value (min == max -> no limits) */
1647 /** maximum value for double/int */
1649 /** default boo [0,1]l/double/int value */
1652 * default string value (with optional semicolon delimited extra option-list
1653 * i.e. option1;option2;option3
1654 * defval might select other then first argument as default
1657 #define FF_OPT_MAX_DEPTH 10
1661 * Parse option(s) and sets fields in passed structure
1662 * @param strct structure where the parsed results will be written
1663 * @param list list with AVOptions
1664 * @param opts string with options for parsing
1666 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1672 typedef struct AVCodec {
1674 enum CodecType type;
1677 int (*init)(AVCodecContext *);
1678 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1679 int (*close)(AVCodecContext *);
1680 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1681 uint8_t *buf, int buf_size);
1683 const AVOption *options;
1684 struct AVCodec *next;
1685 void (*flush)(AVCodecContext *);
1686 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1687 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1691 * four components are given, that's all.
1692 * the last component is alpha
1694 typedef struct AVPicture {
1696 int linesize[4]; ///< number of bytes per line
1701 * This structure defines a method for communicating palette changes
1702 * between and demuxer and a decoder.
1704 #define AVPALETTE_SIZE 1024
1705 #define AVPALETTE_COUNT 256
1706 typedef struct AVPaletteControl {
1708 /* demuxer sets this to 1 to indicate the palette has changed;
1709 * decoder resets to 0 */
1710 int palette_changed;
1712 /* 4-byte ARGB palette entries, stored in native byte order; note that
1713 * the individual palette components should be on a 8-bit scale; if
1714 * the palette data comes from a IBM VGA native format, the component
1715 * data is probably 6 bits in size and needs to be scaled */
1716 unsigned int palette[AVPALETTE_COUNT];
1720 extern AVCodec ac3_encoder;
1721 extern AVCodec mp2_encoder;
1722 extern AVCodec mp3lame_encoder;
1723 extern AVCodec oggvorbis_encoder;
1724 extern AVCodec faac_encoder;
1725 extern AVCodec mpeg1video_encoder;
1726 extern AVCodec mpeg2video_encoder;
1727 extern AVCodec h263_encoder;
1728 extern AVCodec h263p_encoder;
1729 extern AVCodec flv_encoder;
1730 extern AVCodec rv10_encoder;
1731 extern AVCodec rv20_encoder;
1732 extern AVCodec dvvideo_encoder;
1733 extern AVCodec mjpeg_encoder;
1734 extern AVCodec ljpeg_encoder;
1735 extern AVCodec mpeg4_encoder;
1736 extern AVCodec msmpeg4v1_encoder;
1737 extern AVCodec msmpeg4v2_encoder;
1738 extern AVCodec msmpeg4v3_encoder;
1739 extern AVCodec wmv1_encoder;
1740 extern AVCodec wmv2_encoder;
1741 extern AVCodec huffyuv_encoder;
1742 extern AVCodec h264_encoder;
1743 extern AVCodec asv1_encoder;
1744 extern AVCodec asv2_encoder;
1745 extern AVCodec vcr1_encoder;
1746 extern AVCodec ffv1_encoder;
1747 extern AVCodec mdec_encoder;
1748 extern AVCodec zlib_encoder;
1749 extern AVCodec svq1_encoder;
1751 extern AVCodec h263_decoder;
1752 extern AVCodec h261_decoder;
1753 extern AVCodec mpeg4_decoder;
1754 extern AVCodec msmpeg4v1_decoder;
1755 extern AVCodec msmpeg4v2_decoder;
1756 extern AVCodec msmpeg4v3_decoder;
1757 extern AVCodec wmv1_decoder;
1758 extern AVCodec wmv2_decoder;
1759 extern AVCodec mpeg1video_decoder;
1760 extern AVCodec mpeg2video_decoder;
1761 extern AVCodec mpegvideo_decoder;
1762 extern AVCodec mpeg_xvmc_decoder;
1763 extern AVCodec h263i_decoder;
1764 extern AVCodec flv_decoder;
1765 extern AVCodec rv10_decoder;
1766 extern AVCodec rv20_decoder;
1767 extern AVCodec svq1_decoder;
1768 extern AVCodec svq3_decoder;
1769 extern AVCodec dvvideo_decoder;
1770 extern AVCodec wmav1_decoder;
1771 extern AVCodec wmav2_decoder;
1772 extern AVCodec mjpeg_decoder;
1773 extern AVCodec mjpegb_decoder;
1774 extern AVCodec sp5x_decoder;
1775 extern AVCodec mp2_decoder;
1776 extern AVCodec mp3_decoder;
1777 extern AVCodec mace3_decoder;
1778 extern AVCodec mace6_decoder;
1779 extern AVCodec huffyuv_decoder;
1780 extern AVCodec oggvorbis_decoder;
1781 extern AVCodec cyuv_decoder;
1782 extern AVCodec h264_decoder;
1783 extern AVCodec indeo3_decoder;
1784 extern AVCodec vp3_decoder;
1785 extern AVCodec theora_decoder;
1786 extern AVCodec amr_nb_decoder;
1787 extern AVCodec amr_nb_encoder;
1788 extern AVCodec amr_wb_encoder;
1789 extern AVCodec amr_wb_decoder;
1790 extern AVCodec aac_decoder;
1791 extern AVCodec mpeg4aac_decoder;
1792 extern AVCodec asv1_decoder;
1793 extern AVCodec asv2_decoder;
1794 extern AVCodec vcr1_decoder;
1795 extern AVCodec cljr_decoder;
1796 extern AVCodec ffv1_decoder;
1797 extern AVCodec fourxm_decoder;
1798 extern AVCodec mdec_decoder;
1799 extern AVCodec roq_decoder;
1800 extern AVCodec interplay_video_decoder;
1801 extern AVCodec xan_wc3_decoder;
1802 extern AVCodec rpza_decoder;
1803 extern AVCodec cinepak_decoder;
1804 extern AVCodec msrle_decoder;
1805 extern AVCodec msvideo1_decoder;
1806 extern AVCodec vqa_decoder;
1807 extern AVCodec idcin_decoder;
1808 extern AVCodec eightbps_decoder;
1809 extern AVCodec smc_decoder;
1810 extern AVCodec flic_decoder;
1811 extern AVCodec vmdvideo_decoder;
1812 extern AVCodec vmdaudio_decoder;
1813 extern AVCodec truemotion1_decoder;
1814 extern AVCodec mszh_decoder;
1815 extern AVCodec zlib_decoder;
1816 extern AVCodec ra_144_decoder;
1817 extern AVCodec ra_288_decoder;
1818 extern AVCodec roq_dpcm_decoder;
1819 extern AVCodec interplay_dpcm_decoder;
1820 extern AVCodec xan_dpcm_decoder;
1821 extern AVCodec qtrle_decoder;
1822 extern AVCodec flac_decoder;
1825 #define PCM_CODEC(id, name) \
1826 extern AVCodec name ## _decoder; \
1827 extern AVCodec name ## _encoder
1829 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1830 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1831 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1832 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1833 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1834 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1835 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1836 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1840 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1841 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1842 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1843 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1844 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1845 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1846 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1847 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1848 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1849 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1850 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1851 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1855 /* dummy raw video codec */
1856 extern AVCodec rawvideo_encoder;
1857 extern AVCodec rawvideo_decoder;
1859 /* the following codecs use external GPL libs */
1860 extern AVCodec ac3_decoder;
1864 struct ReSampleContext;
1865 struct AVResampleContext;
1867 typedef struct ReSampleContext ReSampleContext;
1869 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1870 int output_rate, int input_rate);
1871 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1872 void audio_resample_close(ReSampleContext *s);
1874 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1875 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1876 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1877 void av_resample_close(struct AVResampleContext *c);
1879 /* YUV420 format is assumed ! */
1881 struct ImgReSampleContext;
1883 typedef struct ImgReSampleContext ImgReSampleContext;
1885 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1886 int input_width, int input_height);
1888 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1889 int iwidth, int iheight,
1890 int topBand, int bottomBand,
1891 int leftBand, int rightBand,
1892 int padtop, int padbottom,
1893 int padleft, int padright);
1896 void img_resample(ImgReSampleContext *s,
1897 AVPicture *output, const AVPicture *input);
1899 void img_resample_close(ImgReSampleContext *s);
1902 * Allocate memory for a picture. Call avpicture_free to free it.
1904 * @param picture the picture to be filled in.
1905 * @param pix_fmt the format of the picture.
1906 * @param width the width of the picture.
1907 * @param height the height of the picture.
1908 * @return 0 if successful, -1 if not.
1910 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1912 /* Free a picture previously allocated by avpicture_alloc. */
1913 void avpicture_free(AVPicture *picture);
1915 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1916 int pix_fmt, int width, int height);
1917 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1918 unsigned char *dest, int dest_size);
1919 int avpicture_get_size(int pix_fmt, int width, int height);
1920 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1921 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1922 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1924 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1925 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1926 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1927 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1928 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1929 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1931 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1933 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1934 int has_alpha, int *loss_ptr);
1936 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1937 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1938 int img_get_alpha_info(const AVPicture *src,
1939 int pix_fmt, int width, int height);
1941 /* convert among pixel formats */
1942 int img_convert(AVPicture *dst, int dst_pix_fmt,
1943 const AVPicture *src, int pix_fmt,
1944 int width, int height);
1946 /* deinterlace a picture */
1947 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1948 int pix_fmt, int width, int height);
1950 /* external high level API */
1952 extern AVCodec *first_avcodec;
1954 /* returns LIBAVCODEC_VERSION_INT constant */
1955 unsigned avcodec_version(void);
1956 /* returns LIBAVCODEC_BUILD constant */
1957 unsigned avcodec_build(void);
1958 void avcodec_init(void);
1960 void register_avcodec(AVCodec *format);
1961 AVCodec *avcodec_find_encoder(enum CodecID id);
1962 AVCodec *avcodec_find_encoder_by_name(const char *name);
1963 AVCodec *avcodec_find_decoder(enum CodecID id);
1964 AVCodec *avcodec_find_decoder_by_name(const char *name);
1965 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1967 void avcodec_get_context_defaults(AVCodecContext *s);
1968 AVCodecContext *avcodec_alloc_context(void);
1969 void avcodec_get_frame_defaults(AVFrame *pic);
1970 AVFrame *avcodec_alloc_frame(void);
1972 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1973 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1974 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
1975 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
1976 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
1978 int avcodec_thread_init(AVCodecContext *s, int thread_count);
1979 void avcodec_thread_free(AVCodecContext *s);
1980 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1981 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
1982 //FIXME func typedef
1985 * opens / inits the AVCodecContext.
1988 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1990 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1991 int *frame_size_ptr,
1992 uint8_t *buf, int buf_size);
1993 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1994 int *got_picture_ptr,
1995 uint8_t *buf, int buf_size);
1996 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1998 uint8_t *buf, int buf_size);
1999 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2000 const short *samples);
2001 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2002 const AVFrame *pict);
2004 int avcodec_close(AVCodecContext *avctx);
2006 void avcodec_register_all(void);
2008 void avcodec_flush_buffers(AVCodecContext *avctx);
2010 /* misc usefull functions */
2013 * returns a single letter to describe the picture type
2015 char av_get_pict_type_char(int pict_type);
2018 * reduce a fraction.
2019 * this is usefull for framerate calculations
2020 * @param max the maximum allowed for dst_nom & dst_den
2021 * @return 1 if exact, 0 otherwise
2023 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2026 * rescale a 64bit integer.
2027 * a simple a*b/c isnt possible as it can overflow
2029 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2033 * Interface for 0.5.0 version
2035 * do not even think about it's usage for this moment
2039 /// compressed size used from given memory buffer
2041 /// I/P/B frame type
2047 * order can't be changed - once it was defined
2051 AVC_OPEN_BY_NAME = 0xACA000,
2052 AVC_OPEN_BY_CODEC_ID,
2057 // pin - struct { uint8_t* src, uint_t src_size }
2058 // pout - struct { AVPicture* img, consumed_bytes,
2060 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2061 // pout - uint_t used_from_dest_size
2064 // query/get video commands
2065 AVC_GET_VERSION = 0xACB000,
2069 AVC_GET_QUANT_TABLE,
2072 // query/get audio commands
2073 AVC_GET_FRAME_SIZE = 0xABC000,
2075 // maybe define some simple structure which
2076 // might be passed to the user - but they can't
2077 // contain any codec specific parts and these
2078 // calls are usualy necessary only few times
2080 // set video commands
2081 AVC_SET_WIDTH = 0xACD000,
2084 // set video encoding commands
2085 AVC_SET_FRAME_RATE = 0xACD800,
2089 // set audio commands
2090 AVC_SET_SAMPLE_RATE = 0xACE000,
2096 * \param handle allocated private structure by libavcodec
2097 * for initialization pass NULL - will be returned pout
2098 * user is supposed to know nothing about its structure
2099 * \param cmd type of operation to be performed
2100 * \param pint input parameter
2101 * \param pout output parameter
2103 * \returns command status - eventually for query command it might return
2104 * integer resulting value
2106 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2109 typedef struct AVCodecParserContext {
2111 struct AVCodecParser *parser;
2112 int64_t frame_offset; /* offset of the current frame */
2113 int64_t cur_offset; /* current offset
2114 (incremented by each av_parser_parse()) */
2115 int64_t last_frame_offset; /* offset of the last frame */
2117 int pict_type; /* XXX: put it back in AVCodecContext */
2118 int repeat_pict; /* XXX: put it back in AVCodecContext */
2119 int64_t pts; /* pts of the current frame */
2120 int64_t dts; /* dts of the current frame */
2125 int fetch_timestamp;
2127 #define AV_PARSER_PTS_NB 4
2128 int cur_frame_start_index;
2129 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2130 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2131 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2132 } AVCodecParserContext;
2134 typedef struct AVCodecParser {
2135 int codec_ids[3]; /* several codec IDs are permitted */
2137 int (*parser_init)(AVCodecParserContext *s);
2138 int (*parser_parse)(AVCodecParserContext *s,
2139 AVCodecContext *avctx,
2140 uint8_t **poutbuf, int *poutbuf_size,
2141 const uint8_t *buf, int buf_size);
2142 void (*parser_close)(AVCodecParserContext *s);
2143 struct AVCodecParser *next;
2146 extern AVCodecParser *av_first_parser;
2148 void av_register_codec_parser(AVCodecParser *parser);
2149 AVCodecParserContext *av_parser_init(int codec_id);
2150 int av_parser_parse(AVCodecParserContext *s,
2151 AVCodecContext *avctx,
2152 uint8_t **poutbuf, int *poutbuf_size,
2153 const uint8_t *buf, int buf_size,
2154 int64_t pts, int64_t dts);
2155 void av_parser_close(AVCodecParserContext *s);
2157 extern AVCodecParser mpegvideo_parser;
2158 extern AVCodecParser mpeg4video_parser;
2159 extern AVCodecParser h261_parser;
2160 extern AVCodecParser h263_parser;
2161 extern AVCodecParser h264_parser;
2162 extern AVCodecParser mpegaudio_parser;
2163 extern AVCodecParser ac3_parser;
2166 void *av_malloc(unsigned int size);
2167 void *av_mallocz(unsigned int size);
2168 void *av_realloc(void *ptr, unsigned int size);
2169 void av_free(void *ptr);
2170 char *av_strdup(const char *s);
2171 void av_freep(void *ptr);
2172 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2173 /* for static data only */
2174 /* call av_free_static to release all staticaly allocated tables */
2175 void av_free_static(void);
2176 void *av_mallocz_static(unsigned int size);
2178 /* add by bero : in adx.c */
2179 int is_adx(const unsigned char *buf,size_t bufsize);
2181 void img_copy(AVPicture *dst, const AVPicture *src,
2182 int pix_fmt, int width, int height);
2188 #define AV_LOG_QUIET -1
2189 #define AV_LOG_ERROR 0
2190 #define AV_LOG_INFO 1
2191 #define AV_LOG_DEBUG 2
2194 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2196 extern void av_log(void*, int level, const char *fmt, ...);
2199 extern void av_vlog(void*, int level, const char *fmt, va_list);
2200 extern int av_log_get_level(void);
2201 extern void av_log_set_level(int);
2202 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2205 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2206 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2207 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2208 (((uint8_t*)(x))[1] << 16) | \
2209 (((uint8_t*)(x))[2] << 8) | \
2211 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2212 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2213 (((uint8_t*)(x))[2] << 16) | \
2214 (((uint8_t*)(x))[1] << 8) | \
2222 #endif /* AVCODEC_H */