17 #define FFMPEG_VERSION_INT 0x000408
18 #define FFMPEG_VERSION "0.4.8"
19 #define LIBAVCODEC_BUILD 4691
21 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
22 #define LIBAVCODEC_VERSION FFMPEG_VERSION
24 #define AV_STRINGIFY(s) AV_TOSTRING(s)
25 #define AV_TOSTRING(s) #s
26 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
31 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
32 CODEC_ID_MPEG2VIDEO_XVMC,
36 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
77 CODEC_ID_INTERPLAY_VIDEO,
87 /* various pcm "codecs" */
97 /* various adpcm codecs */
98 CODEC_ID_ADPCM_IMA_QT,
99 CODEC_ID_ADPCM_IMA_WAV,
100 CODEC_ID_ADPCM_IMA_DK3,
101 CODEC_ID_ADPCM_IMA_DK4,
102 CODEC_ID_ADPCM_IMA_WS,
112 /* RealAudio codecs*/
116 /* various DPCM codecs */
118 CODEC_ID_INTERPLAY_DPCM,
121 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
122 stream (only used by libavformat) */
125 /* CODEC_ID_MP3LAME is absolete */
126 #define CODEC_ID_MP3LAME CODEC_ID_MP3
129 CODEC_TYPE_UNKNOWN = -1,
136 * Pixel format. Notes:
138 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
139 * color is put together as:
140 * (A << 24) | (R << 16) | (G << 8) | B
141 * This is stored as BGRA on little endian CPU architectures and ARGB on
144 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
145 * image data is stored in AVFrame.data[0]. The palette is transported in
146 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
147 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
148 * also endian-specific). Note also that the individual RGB palette
149 * components stored in AVFrame.data[1] should be in the range 0..255.
150 * This is important as many custom PAL8 video codecs that were designed
151 * to run on the IBM VGA graphics adapter use 6-bit palette components.
154 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
156 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
157 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
158 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
159 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
160 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
161 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
162 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
163 PIX_FMT_RGB565, ///< always stored in cpu endianness
164 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
166 PIX_FMT_MONOWHITE, ///< 0 is white
167 PIX_FMT_MONOBLACK, ///< 0 is black
168 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
169 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
170 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
171 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
172 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
173 PIX_FMT_XVMC_MPEG2_IDCT,
177 /* currently unused, may be used if 24/32 bits samples ever supported */
179 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
183 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
186 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
187 * this is mainly needed because some optimized bitstream readers read
188 * 32 or 64 bit at once and could read over the end<br>
189 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
190 * MPEG bitstreams could cause overread and segfault
192 #define FF_INPUT_BUFFER_PADDING_SIZE 8
194 /* motion estimation type, EPZS by default */
204 typedef struct RcOverride{
207 int qscale; // if this is 0 then quality_factor will be used instead
208 float quality_factor;
211 /* only for ME compatiblity with old apps */
212 extern int motion_estimation_method;
214 /* ME algos sorted by quality */
216 static const __attribute__((unused)) int Motion_Est_QTab[] =
217 { ME_ZERO, ME_PHODS, ME_LOG, ME_X1, ME_EPZS, ME_FULL };
220 #define FF_MAX_B_FRAMES 8
223 these flags can be passed in AVCodecContext.flags before initing
224 Note: note not everything is supported yet
227 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
228 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
229 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
230 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
231 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
232 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
233 /* parent program gurantees that the input for b-frame containing streams is not written to
234 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
235 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
236 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
237 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
238 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
239 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
240 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
241 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
242 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
243 of only at frame boundaries */
244 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
245 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
246 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
247 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
248 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
249 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
250 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
251 /* Fx : Flag for h263+ extra options */
252 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
253 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
254 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
255 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
256 /* For advanced prediction mode, we reuse the 4MV flag */
257 /* Unsupported options :
258 * Syntax Arithmetic coding (SAC)
259 * Deblocking filter internal loop
261 * Reference Picture Selection
262 * Independant Segment Decoding
263 * Alternative Inter * VLC
264 * Modified Quantization */
266 /* codec capabilities */
268 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
270 * Codec uses get_buffer() for allocating buffers.
271 * direct rendering method 1
273 #define CODEC_CAP_DR1 0x0002
274 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
276 #define CODEC_CAP_PARSE_ONLY 0x0004
277 #define CODEC_CAP_TRUNCATED 0x0008
279 * Codec can use conditional replenishment if available.
281 #define CODEC_CAP_CR 0x0010
285 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
287 typedef struct AVPanScan{
290 * - encoding: set by user.
291 * - decoding: set by lavc
296 * width and height in 1/16 pel
297 * - encoding: set by user.
298 * - decoding: set by lavc
304 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
305 * - encoding: set by user.
306 * - decoding: set by lavc
308 int16_t position[3][2];
311 #define FF_COMMON_FRAME \
313 * pointer to the picture planes.\
314 * this might be different from the first allocated byte\
321 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
322 * this isnt used by lavc unless the default get/release_buffer() is used\
328 * 1 -> keyframe, 0-> not\
329 * - encoding: set by lavc\
330 * - decoding: set by lavc\
335 * picture type of the frame, see ?_TYPE below.\
336 * - encoding: set by lavc for coded_picture (and set by user for input)\
337 * - decoding: set by lavc\
342 * presentation timestamp in micro seconds (time when frame should be shown to user)\
343 * if 0 then the frame_rate will be used as reference\
344 * - encoding: MUST be set by user\
345 * - decoding: set by lavc\
350 * picture number in bitstream order.\
351 * - encoding: set by\
352 * - decoding: set by lavc\
354 int coded_picture_number;\
356 * picture number in display order.\
357 * - encoding: set by\
358 * - decoding: set by lavc\
360 int display_picture_number;\
363 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
364 * - encoding: set by lavc for coded_picture (and set by user for input)\
365 * - decoding: set by lavc\
370 * buffer age (1->was last buffer and dint change, 2->..., ...).\
371 * set to INT_MAX if the buffer has not been used yet \
372 * - encoding: unused\
373 * - decoding: MUST be set by get_buffer()\
378 * is this picture used as reference\
379 * - encoding: unused\
380 * - decoding: set by lavc (before get_buffer() call))\
386 * - encoding: unused\
387 * - decoding: set by lavc\
389 int8_t *qscale_table;\
392 * - encoding: unused\
393 * - decoding: set by lavc\
398 * mbskip_table[mb]>=1 if MB didnt change\
399 * stride= mb_width = (width+15)>>4\
400 * - encoding: unused\
401 * - decoding: set by lavc\
403 uint8_t *mbskip_table;\
406 * for some private data of the user\
407 * - encoding: unused\
408 * - decoding: set by user\
414 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
415 * - decoding: unused\
420 * type of the buffer (to keep track of who has to dealloc data[*])\
421 * - encoding: set by the one who allocs it\
422 * - decoding: set by the one who allocs it\
423 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
428 * when decoding, this signal how much the picture must be delayed.\
429 * extra_delay = repeat_pict / (2*fps)\
430 * - encoding: unused\
431 * - decoding: set by lavc\
441 * The content of the picture is interlaced.\
442 * - encoding: set by user\
443 * - decoding: set by lavc (default 0)\
445 int interlaced_frame;\
448 * if the content is interlaced, is top field displayed first.\
449 * - encoding: set by user\
450 * - decoding: set by lavc\
452 int top_field_first;\
456 * - encoding: set by user\
457 * - decoding: set by lavc\
459 AVPanScan *pan_scan;\
462 * tell user application that palette has changed from previous frame.\
463 * - encoding: ??? (no palette-enabled encoder yet)\
464 * - decoding: set by lavc (default 0)\
466 int palette_has_changed;\
469 * Codec suggestion on buffer type if != 0\
470 * - encoding: unused\
471 * - decoding: set by lavc (before get_buffer() call))\
475 #define FF_QSCALE_TYPE_MPEG1 0
476 #define FF_QSCALE_TYPE_MPEG2 1
478 #define FF_BUFFER_TYPE_INTERNAL 1
479 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
480 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base)
481 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
484 #define FF_I_TYPE 1 // Intra
485 #define FF_P_TYPE 2 // Predicted
486 #define FF_B_TYPE 3 // Bi-dir predicted
487 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
491 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
492 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
493 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
494 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
499 typedef struct AVFrame {
503 #define DEFAULT_FRAME_RATE_BASE 1001000
506 * main external api structure.
508 typedef struct AVCodecContext {
510 * the average bitrate.
511 * - encoding: set by user. unused for constant quantizer encoding
512 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
517 * number of bits the bitstream is allowed to diverge from the reference.
518 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
519 * - encoding: set by user. unused for constant quantizer encoding
522 int bit_rate_tolerance;
526 * - encoding: set by user.
527 * - decoding: set by user.
532 * some codecs needs additionnal format info. It is stored here
533 * - encoding: set by user.
534 * - decoding: set by lavc. (FIXME is this ok?)
539 * motion estimation algorithm used for video coding.
540 * - encoding: MUST be set by user.
546 * some codecs need / can use extra-data like huffman tables.
547 * mjpeg: huffman tables
548 * rv10: additional flags
549 * mpeg4: global headers (they can be in the bitstream or here)
550 * - encoding: set/allocated/freed by lavc.
551 * - decoding: set/allocated/freed by user.
558 * frames per sec multiplied by frame_rate_base.
559 * for variable fps this is the precission, so if the timestamps
560 * can be specified in msec precssion then this is 1000*frame_rate_base
561 * - encoding: MUST be set by user
562 * - decoding: set by lavc. 0 or the frame_rate if available
568 * - encoding: MUST be set by user.
569 * - decoding: set by user if known, codec should override / dynamically change if needed
573 #define FF_ASPECT_SQUARE 1
574 #define FF_ASPECT_4_3_625 2
575 #define FF_ASPECT_4_3_525 3
576 #define FF_ASPECT_16_9_625 4
577 #define FF_ASPECT_16_9_525 5
578 #define FF_ASPECT_EXTENDED 15
581 * the number of pictures in a group of pitures, or 0 for intra_only.
582 * - encoding: set by user.
588 * pixel format, see PIX_FMT_xxx.
589 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
590 * conversion is in order. This only works for
591 * codecs with one supported pix_fmt, we should
592 * do something for a generic case as well.
593 * - decoding: set by lavc.
595 enum PixelFormat pix_fmt;
598 * Frame rate emulation. If not zero lower layer (i.e. format handler)
599 * has to read frames at native frame rate.
600 * - encoding: set by user.
601 * - decoding: unused.
606 * if non NULL, 'draw_horiz_band' is called by the libavcodec
607 * decoder to draw an horizontal band. It improve cache usage. Not
608 * all codecs can do that. You must check the codec capabilities
611 * - decoding: set by user.
612 * @param height the height of the slice
613 * @param y the y position of the slice
614 * @param type 1->top field, 2->bottom field, 3->frame
615 * @param offset offset into the AVFrame.data from which the slice should be read
617 void (*draw_horiz_band)(struct AVCodecContext *s,
618 const AVFrame *src, int offset[4],
619 int y, int type, int height);
622 int sample_rate; ///< samples per sec
624 int sample_fmt; ///< sample format, currenly unused
626 /* the following data should not be initialized */
627 int frame_size; ///< in samples, initialized when calling 'init'
628 int frame_number; ///< audio or video frame number
629 int real_pict_num; ///< returns the real picture number of previous encoded frame
632 * number of frames the decoded output will be delayed relative to
634 * - encoding: set by lavc.
639 /* - encoding parameters */
640 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
641 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
645 * - encoding: set by user.
652 * - encoding: set by user.
658 * maximum quantizer difference etween frames.
659 * - encoding: set by user.
665 * maximum number of b frames between non b frames.
666 * note: the output will be delayed by max_b_frames+1 relative to the input
667 * - encoding: set by user.
673 * qscale factor between ip and b frames.
674 * - encoding: set by user.
677 float b_quant_factor;
679 /** obsolete FIXME remove */
681 int b_frame_strategy;
686 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
690 struct AVCodec *codec;
694 /* The following data is for RTP friendly coding */
695 /* By now only H.263/H.263+/MPEG4 coder honours this */
696 int rtp_mode; /* 1 for activate RTP friendly-mode */
697 /* highers numbers represent more error-prone */
698 /* enviroments, by now just "1" exist */
700 int rtp_payload_size; /* The size of the RTP payload, the coder will */
701 /* do it's best to deliver a chunk with size */
702 /* below rtp_payload_size, the chunk will start */
703 /* with a start code on some codecs like H.263 */
704 /* This doesn't take account of any particular */
705 /* headers inside the transmited RTP payload */
708 /* The RTP callcack: This function is called */
709 /* every time the encoder as a packet to send */
710 /* Depends on the encoder if the data starts */
711 /* with a Start Code (it should) H.263 does */
712 void (*rtp_callback)(void *data, int size, int packet_number);
714 /* statistics, used for 2-pass encoding */
725 * number of bits used for the previously encoded frame.
726 * - encoding: set by lavc
732 * private data of the user, can be used to carry app specific stuff.
733 * - encoding: set by user
734 * - decoding: set by user
739 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
740 enum CodecID codec_id; /* see CODEC_ID_xxx */
743 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
744 * this is used to workaround some encoder bugs
745 * - encoding: set by user, if not then the default based on codec_id will be used
746 * - decoding: set by user, will be converted to upper case by lavc during init
748 unsigned int codec_tag;
751 * workaround bugs in encoders which sometimes cannot be detected automatically.
753 * - decoding: set by user
756 #define FF_BUG_AUTODETECT 1 ///< autodetection
757 #define FF_BUG_OLD_MSMPEG4 2
758 #define FF_BUG_XVID_ILACE 4
759 #define FF_BUG_UMP4 8
760 #define FF_BUG_NO_PADDING 16
761 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
762 #define FF_BUG_QPEL_CHROMA 64
763 #define FF_BUG_STD_QPEL 128
764 #define FF_BUG_QPEL_CHROMA2 256
765 #define FF_BUG_DIRECT_BLOCKSIZE 512
766 #define FF_BUG_EDGE 1024
767 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
770 * luma single coeff elimination threshold.
771 * - encoding: set by user
774 int luma_elim_threshold;
777 * chroma single coeff elimination threshold.
778 * - encoding: set by user
781 int chroma_elim_threshold;
784 * strictly follow the std (MPEG4, ...).
785 * - encoding: set by user
788 int strict_std_compliance;
791 * qscale offset between ip and b frames.
792 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
793 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
794 * - encoding: set by user.
797 float b_quant_offset;
800 * error resilience higher values will detect more errors but may missdetect
801 * some more or less valid parts as errors.
803 * - decoding: set by user
805 int error_resilience;
806 #define FF_ER_CAREFULL 1
807 #define FF_ER_COMPLIANT 2
808 #define FF_ER_AGGRESSIVE 3
809 #define FF_ER_VERY_AGGRESSIVE 4
812 * called at the beginning of each frame to get a buffer for it.
813 * if pic.reference is set then the frame will be read later by lavc
814 * width and height should be rounded up to the next multiple of 16
816 * - decoding: set by lavc, user can override
818 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
821 * called to release buffers which where allocated with get_buffer.
822 * a released buffer can be reused in get_buffer()
823 * pic.data[*] must be set to NULL
825 * - decoding: set by lavc, user can override
827 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
830 * is 1 if the decoded stream contains b frames, 0 otherwise.
832 * - decoding: set by lavc
836 int block_align; ///< used by some WAV based audio codecs
838 int parse_only; /* - decoding only: if true, only parsing is done
839 (function avcodec_parse_frame()). The frame
840 data is returned. Only MPEG codecs support this now. */
843 * 0-> h263 quant 1-> mpeg quant.
844 * - encoding: set by user.
850 * pass1 encoding statistics output buffer.
851 * - encoding: set by lavc
857 * pass2 encoding statistics input buffer.
858 * concatenated stuff from stats_out of pass1 should be placed here
859 * - encoding: allocated/set/freed by user
865 * ratecontrol qmin qmax limiting method.
866 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
867 * - encoding: set by user.
876 * ratecontrol override, see RcOverride.
877 * - encoding: allocated/set/freed by user.
880 RcOverride *rc_override;
881 int rc_override_count;
884 * rate control equation.
885 * - encoding: set by user
892 * - encoding: set by user.
899 * - encoding: set by user.
905 * decoder bitstream buffer size.
906 * - encoding: set by user.
910 float rc_buffer_aggressivity;
913 * qscale factor between p and i frames.
914 * - encoding: set by user.
917 float i_quant_factor;
920 * qscale offset between p and i frames.
921 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
922 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
923 * - encoding: set by user.
926 float i_quant_offset;
929 * initial complexity for pass1 ratecontrol.
930 * - encoding: set by user.
933 float rc_initial_cplx;
936 * dct algorithm, see FF_DCT_* below.
937 * - encoding: set by user
941 #define FF_DCT_AUTO 0
942 #define FF_DCT_FASTINT 1
945 #define FF_DCT_MLIB 4
946 #define FF_DCT_ALTIVEC 5
947 #define FF_DCT_FAAN 6
950 * luminance masking (0-> disabled).
951 * - encoding: set by user
957 * temporary complexity masking (0-> disabled).
958 * - encoding: set by user
961 float temporal_cplx_masking;
964 * spatial complexity masking (0-> disabled).
965 * - encoding: set by user
968 float spatial_cplx_masking;
971 * p block masking (0-> disabled).
972 * - encoding: set by user
978 * darkness masking (0-> disabled).
979 * - encoding: set by user
985 /* for binary compatibility */
989 * idct algorithm, see FF_IDCT_* below.
990 * - encoding: set by user
991 * - decoding: set by user
994 #define FF_IDCT_AUTO 0
995 #define FF_IDCT_INT 1
996 #define FF_IDCT_SIMPLE 2
997 #define FF_IDCT_SIMPLEMMX 3
998 #define FF_IDCT_LIBMPEG2MMX 4
999 #define FF_IDCT_PS2 5
1000 #define FF_IDCT_MLIB 6
1001 #define FF_IDCT_ARM 7
1002 #define FF_IDCT_ALTIVEC 8
1003 #define FF_IDCT_SH4 9
1004 #define FF_IDCT_SIMPLEARM 10
1008 * - encoding: set by lavc
1009 * - decoding: set by user (or 0)
1013 * slice offsets in the frame in bytes.
1014 * - encoding: set/allocated by lavc
1015 * - decoding: set/allocated by user (or NULL)
1020 * error concealment flags.
1021 * - encoding: unused
1022 * - decoding: set by user
1024 int error_concealment;
1025 #define FF_EC_GUESS_MVS 1
1026 #define FF_EC_DEBLOCK 2
1029 * dsp_mask could be add used to disable unwanted CPU features
1030 * CPU features (i.e. MMX, SSE. ...)
1032 * with FORCE flag you may instead enable given CPU features
1033 * (Dangerous: usable in case of misdetection, improper usage however will
1034 * result into program crash)
1037 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1038 /* lower 16 bits - CPU features */
1040 #define FF_MM_MMX 0x0001 /* standard MMX */
1041 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1042 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1043 #define FF_MM_SSE 0x0008 /* SSE functions */
1044 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1045 #endif /* HAVE_MMX */
1048 * bits per sample/pixel from the demuxer (needed for huffyuv).
1049 * - encoding: set by lavc
1050 * - decoding: set by user
1052 int bits_per_sample;
1055 * prediction method (needed for huffyuv).
1056 * - encoding: set by user
1057 * - decoding: unused
1059 int prediction_method;
1060 #define FF_PRED_LEFT 0
1061 #define FF_PRED_PLANE 1
1062 #define FF_PRED_MEDIAN 2
1065 * sample aspect ratio (0 if unknown).
1066 * - encoding: set by user.
1067 * - decoding: set by lavc.
1069 AVRational sample_aspect_ratio;
1072 * the picture in the bitstream.
1073 * - encoding: set by lavc
1074 * - decoding: set by lavc
1076 AVFrame *coded_frame;
1080 * - encoding: set by user.
1081 * - decoding: set by user.
1084 #define FF_DEBUG_PICT_INFO 1
1085 #define FF_DEBUG_RC 2
1086 #define FF_DEBUG_BITSTREAM 4
1087 #define FF_DEBUG_MB_TYPE 8
1088 #define FF_DEBUG_QP 16
1089 #define FF_DEBUG_MV 32
1090 #define FF_DEBUG_VIS_MV 0x00000040
1091 #define FF_DEBUG_SKIP 0x00000080
1092 #define FF_DEBUG_STARTCODE 0x00000100
1093 #define FF_DEBUG_PTS 0x00000200
1094 #define FF_DEBUG_ER 0x00000400
1095 #define FF_DEBUG_MMCO 0x00000800
1096 #define FF_DEBUG_BUGS 0x00001000
1100 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1101 * - decoding: unused
1106 * minimum MB quantizer.
1107 * - encoding: set by user.
1108 * - decoding: unused
1113 * maximum MB quantizer.
1114 * - encoding: set by user.
1115 * - decoding: unused
1120 * motion estimation compare function.
1121 * - encoding: set by user.
1122 * - decoding: unused
1126 * subpixel motion estimation compare function.
1127 * - encoding: set by user.
1128 * - decoding: unused
1132 * macroblock compare function (not supported yet).
1133 * - encoding: set by user.
1134 * - decoding: unused
1137 #define FF_CMP_SAD 0
1138 #define FF_CMP_SSE 1
1139 #define FF_CMP_SATD 2
1140 #define FF_CMP_DCT 3
1141 #define FF_CMP_PSNR 4
1142 #define FF_CMP_BIT 5
1144 #define FF_CMP_ZERO 7
1145 #define FF_CMP_CHROMA 256
1148 * ME diamond size & shape.
1149 * - encoding: set by user.
1150 * - decoding: unused
1155 * amount of previous MV predictors (2a+1 x 2a+1 square).
1156 * - encoding: set by user.
1157 * - decoding: unused
1159 int last_predictor_count;
1162 * pre pass for motion estimation.
1163 * - encoding: set by user.
1164 * - decoding: unused
1169 * motion estimation pre pass compare function.
1170 * - encoding: set by user.
1171 * - decoding: unused
1176 * ME pre pass diamond size & shape.
1177 * - encoding: set by user.
1178 * - decoding: unused
1183 * subpel ME quality.
1184 * - encoding: set by user.
1185 * - decoding: unused
1187 int me_subpel_quality;
1190 * callback to negotiate the pixelFormat.
1191 * @param fmt is the list of formats which are supported by the codec,
1192 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1193 * the first is allways the native one
1194 * @return the choosen format
1195 * - encoding: unused
1196 * - decoding: set by user, if not set then the native format will always be choosen
1198 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1201 * DTG active format information (additionnal aspect ratio
1202 * information only used in DVB MPEG2 transport streams). 0 if
1205 * - encoding: unused.
1206 * - decoding: set by decoder
1208 int dtg_active_format;
1209 #define FF_DTG_AFD_SAME 8
1210 #define FF_DTG_AFD_4_3 9
1211 #define FF_DTG_AFD_16_9 10
1212 #define FF_DTG_AFD_14_9 11
1213 #define FF_DTG_AFD_4_3_SP_14_9 13
1214 #define FF_DTG_AFD_16_9_SP_14_9 14
1215 #define FF_DTG_AFD_SP_4_3 15
1218 * Maximum motion estimation search range in subpel units.
1219 * if 0 then no limit
1221 * - encoding: set by user.
1222 * - decoding: unused.
1228 * for variable fps this is 1
1229 * - encoding: set by user.
1230 * - decoding: set by lavc.
1231 * @todo move this after frame_rate
1234 int frame_rate_base;
1236 * intra quantizer bias.
1237 * - encoding: set by user.
1238 * - decoding: unused
1240 int intra_quant_bias;
1241 #define FF_DEFAULT_QUANT_BIAS 999999
1244 * inter quantizer bias.
1245 * - encoding: set by user.
1246 * - decoding: unused
1248 int inter_quant_bias;
1252 * - encoding: unused.
1253 * - decoding: which clrtable should be used for 8bit RGB images
1254 * table have to be stored somewhere FIXME
1259 * internal_buffer count.
1260 * Dont touch, used by lavc default_get_buffer()
1262 int internal_buffer_count;
1266 * Dont touch, used by lavc default_get_buffer()
1268 void *internal_buffer;
1270 #define FF_LAMBDA_SHIFT 7
1271 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1272 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1273 #define FF_LAMBDA_MAX (256*128-1)
1275 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1277 * global quality for codecs which cannot change it per frame.
1278 * this should be proportional to MPEG1/2/4 qscale.
1279 * - encoding: set by user.
1280 * - decoding: unused
1284 #define FF_CODER_TYPE_VLC 0
1285 #define FF_CODER_TYPE_AC 1
1288 * - encoding: set by user.
1289 * - decoding: unused
1295 * - encoding: set by user.
1296 * - decoding: unused
1302 * - encoding: unused
1303 * - decoding: set by user.
1306 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1307 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1308 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1311 * XVideo Motion Acceleration
1312 * - encoding: forbidden
1313 * - decoding: set by decoder
1315 int xvmc_acceleration;
1318 * macroblock decision mode
1319 * - encoding: set by user.
1320 * - decoding: unused
1323 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1324 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1325 #define FF_MB_DECISION_RD 2 ///< rate distoration
1328 * custom intra quantization matrix
1329 * - encoding: set by user, can be NULL
1330 * - decoding: set by lavc
1332 uint16_t *intra_matrix;
1335 * custom inter quantization matrix
1336 * - encoding: set by user, can be NULL
1337 * - decoding: set by lavc
1339 uint16_t *inter_matrix;
1342 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1343 * this is used to workaround some encoder bugs
1344 * - encoding: unused
1345 * - decoding: set by user, will be converted to upper case by lavc during init
1347 unsigned int stream_codec_tag;
1350 * scene change detection threshold.
1351 * 0 is default, larger means fewer detected scene changes
1352 * - encoding: set by user.
1353 * - decoding: unused
1355 int scenechange_threshold;
1358 * minimum lagrange multipler
1359 * - encoding: set by user.
1360 * - decoding: unused
1365 * maximum lagrange multipler
1366 * - encoding: set by user.
1367 * - decoding: unused
1372 * Palette control structure
1373 * - encoding: ??? (no palette-enabled encoder yet)
1374 * - decoding: set by user.
1376 struct AVPaletteControl *palctrl;
1379 * noise reduction strength
1380 * - encoding: set by user.
1381 * - decoding: unused
1383 int noise_reduction;
1386 * Conditional replenishment support
1387 * - encoding: unused
1388 * - decoding: set by user, if 1 user can allocate reusable buffers
1398 typedef struct AVOption {
1399 /** options' name */
1400 const char *name; /* if name is NULL, it indicates a link to next */
1401 /** short English text help or const struct AVOption* subpointer */
1402 const char *help; // const struct AVOption* sub;
1403 /** offset to context structure where the parsed value should be stored */
1405 /** options' type */
1407 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1408 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1409 #define FF_OPT_TYPE_INT 3 ///< integer
1410 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1411 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1412 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1413 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1414 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1415 /** min value (min == max -> no limits) */
1417 /** maximum value for double/int */
1419 /** default boo [0,1]l/double/int value */
1422 * default string value (with optional semicolon delimited extra option-list
1423 * i.e. option1;option2;option3
1424 * defval might select other then first argument as default
1427 #define FF_OPT_MAX_DEPTH 10
1431 * Parse option(s) and sets fields in passed structure
1432 * @param strct structure where the parsed results will be written
1433 * @param list list with AVOptions
1434 * @param opts string with options for parsing
1436 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1442 typedef struct AVCodec {
1444 enum CodecType type;
1447 int (*init)(AVCodecContext *);
1448 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1449 int (*close)(AVCodecContext *);
1450 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1451 uint8_t *buf, int buf_size);
1453 const AVOption *options;
1454 struct AVCodec *next;
1455 void (*flush)(AVCodecContext *);
1459 * four components are given, that's all.
1460 * the last component is alpha
1462 typedef struct AVPicture {
1464 int linesize[4]; ///< number of bytes per line
1469 * This structure defines a method for communicating palette changes
1470 * between and demuxer and a decoder.
1472 #define AVPALETTE_SIZE 1024
1473 #define AVPALETTE_COUNT 256
1474 typedef struct AVPaletteControl {
1476 /* demuxer sets this to 1 to indicate the palette has changed;
1477 * decoder resets to 0 */
1478 int palette_changed;
1480 /* 4-byte ARGB palette entries, stored in native byte order; note that
1481 * the individual palette components should be on a 8-bit scale; if
1482 * the palette data comes from a IBM VGA native format, the component
1483 * data is probably 6 bits in size and needs to be scaled */
1484 unsigned int palette[AVPALETTE_COUNT];
1488 extern AVCodec ac3_encoder;
1489 extern AVCodec mp2_encoder;
1490 extern AVCodec mp3lame_encoder;
1491 extern AVCodec oggvorbis_encoder;
1492 extern AVCodec faac_encoder;
1493 extern AVCodec mpeg1video_encoder;
1494 extern AVCodec mpeg2video_encoder;
1495 extern AVCodec h263_encoder;
1496 extern AVCodec h263p_encoder;
1497 extern AVCodec flv_encoder;
1498 extern AVCodec rv10_encoder;
1499 extern AVCodec mjpeg_encoder;
1500 extern AVCodec ljpeg_encoder;
1501 extern AVCodec mpeg4_encoder;
1502 extern AVCodec msmpeg4v1_encoder;
1503 extern AVCodec msmpeg4v2_encoder;
1504 extern AVCodec msmpeg4v3_encoder;
1505 extern AVCodec wmv1_encoder;
1506 extern AVCodec wmv2_encoder;
1507 extern AVCodec huffyuv_encoder;
1508 extern AVCodec h264_encoder;
1509 extern AVCodec asv1_encoder;
1510 extern AVCodec asv2_encoder;
1511 extern AVCodec vcr1_encoder;
1512 extern AVCodec ffv1_encoder;
1513 extern AVCodec mdec_encoder;
1515 extern AVCodec h263_decoder;
1516 extern AVCodec mpeg4_decoder;
1517 extern AVCodec msmpeg4v1_decoder;
1518 extern AVCodec msmpeg4v2_decoder;
1519 extern AVCodec msmpeg4v3_decoder;
1520 extern AVCodec wmv1_decoder;
1521 extern AVCodec wmv2_decoder;
1522 extern AVCodec mpeg1video_decoder;
1523 extern AVCodec mpeg2video_decoder;
1524 extern AVCodec mpeg_xvmc_decoder;
1525 extern AVCodec h263i_decoder;
1526 extern AVCodec flv_decoder;
1527 extern AVCodec rv10_decoder;
1528 extern AVCodec svq1_decoder;
1529 extern AVCodec svq3_decoder;
1530 extern AVCodec dvvideo_decoder;
1531 extern AVCodec wmav1_decoder;
1532 extern AVCodec wmav2_decoder;
1533 extern AVCodec mjpeg_decoder;
1534 extern AVCodec mjpegb_decoder;
1535 extern AVCodec sp5x_decoder;
1536 extern AVCodec mp2_decoder;
1537 extern AVCodec mp3_decoder;
1538 extern AVCodec mace3_decoder;
1539 extern AVCodec mace6_decoder;
1540 extern AVCodec huffyuv_decoder;
1541 extern AVCodec oggvorbis_decoder;
1542 extern AVCodec cyuv_decoder;
1543 extern AVCodec h264_decoder;
1544 extern AVCodec indeo3_decoder;
1545 extern AVCodec vp3_decoder;
1546 extern AVCodec theora_decoder;
1547 extern AVCodec amr_nb_decoder;
1548 extern AVCodec amr_nb_encoder;
1549 extern AVCodec amr_wb_encoder;
1550 extern AVCodec amr_wb_decoder;
1551 extern AVCodec aac_decoder;
1552 extern AVCodec mpeg4aac_decoder;
1553 extern AVCodec asv1_decoder;
1554 extern AVCodec asv2_decoder;
1555 extern AVCodec vcr1_decoder;
1556 extern AVCodec cljr_decoder;
1557 extern AVCodec ffv1_decoder;
1558 extern AVCodec fourxm_decoder;
1559 extern AVCodec mdec_decoder;
1560 extern AVCodec roq_decoder;
1561 extern AVCodec interplay_video_decoder;
1562 extern AVCodec xan_wc3_decoder;
1563 extern AVCodec rpza_decoder;
1564 extern AVCodec cinepak_decoder;
1565 extern AVCodec msrle_decoder;
1566 extern AVCodec msvideo1_decoder;
1567 extern AVCodec vqa_decoder;
1568 extern AVCodec idcin_decoder;
1569 extern AVCodec ra_144_decoder;
1570 extern AVCodec ra_288_decoder;
1571 extern AVCodec roq_dpcm_decoder;
1572 extern AVCodec interplay_dpcm_decoder;
1573 extern AVCodec xan_dpcm_decoder;
1576 #define PCM_CODEC(id, name) \
1577 extern AVCodec name ## _decoder; \
1578 extern AVCodec name ## _encoder
1580 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1581 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1582 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1583 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1584 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1585 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1586 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1587 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1591 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1592 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1593 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1594 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1595 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1596 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1597 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1598 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1599 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1603 /* dummy raw video codec */
1604 extern AVCodec rawvideo_encoder;
1605 extern AVCodec rawvideo_decoder;
1607 /* the following codecs use external GPL libs */
1608 extern AVCodec ac3_decoder;
1612 struct ReSampleContext;
1614 typedef struct ReSampleContext ReSampleContext;
1616 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1617 int output_rate, int input_rate);
1618 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1619 void audio_resample_close(ReSampleContext *s);
1621 /* YUV420 format is assumed ! */
1623 struct ImgReSampleContext;
1625 typedef struct ImgReSampleContext ImgReSampleContext;
1627 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1628 int input_width, int input_height);
1630 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1631 int iwidth, int iheight,
1632 int topBand, int bottomBand,
1633 int leftBand, int rightBand);
1635 void img_resample(ImgReSampleContext *s,
1636 AVPicture *output, const AVPicture *input);
1638 void img_resample_close(ImgReSampleContext *s);
1641 * Allocate memory for a picture. Call avpicture_free to free it.
1643 * @param picture the picture to be filled in.
1644 * @param pix_fmt the format of the picture.
1645 * @param width the width of the picture.
1646 * @param height the height of the picture.
1647 * @return 0 if successful, -1 if not.
1649 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1651 /* Free a picture previously allocated by avpicture_alloc. */
1652 void avpicture_free(AVPicture *picture);
1654 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1655 int pix_fmt, int width, int height);
1656 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1657 unsigned char *dest, int dest_size);
1658 int avpicture_get_size(int pix_fmt, int width, int height);
1659 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1660 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1661 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1663 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1664 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1665 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1666 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1667 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1668 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1670 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1672 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1673 int has_alpha, int *loss_ptr);
1675 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1676 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1677 int img_get_alpha_info(const AVPicture *src,
1678 int pix_fmt, int width, int height);
1680 /* convert among pixel formats */
1681 int img_convert(AVPicture *dst, int dst_pix_fmt,
1682 const AVPicture *src, int pix_fmt,
1683 int width, int height);
1685 /* deinterlace a picture */
1686 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1687 int pix_fmt, int width, int height);
1689 /* external high level API */
1691 extern AVCodec *first_avcodec;
1693 /* returns LIBAVCODEC_VERSION_INT constant */
1694 unsigned avcodec_version(void);
1695 /* returns LIBAVCODEC_BUILD constant */
1696 unsigned avcodec_build(void);
1697 void avcodec_init(void);
1699 void register_avcodec(AVCodec *format);
1700 AVCodec *avcodec_find_encoder(enum CodecID id);
1701 AVCodec *avcodec_find_encoder_by_name(const char *name);
1702 AVCodec *avcodec_find_decoder(enum CodecID id);
1703 AVCodec *avcodec_find_decoder_by_name(const char *name);
1704 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1706 void avcodec_get_context_defaults(AVCodecContext *s);
1707 AVCodecContext *avcodec_alloc_context(void);
1708 AVFrame *avcodec_alloc_frame(void);
1710 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1711 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1712 void avcodec_default_free_buffers(AVCodecContext *s);
1715 * opens / inits the AVCodecContext.
1718 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1720 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1721 int *frame_size_ptr,
1722 uint8_t *buf, int buf_size);
1723 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1724 int *got_picture_ptr,
1725 uint8_t *buf, int buf_size);
1726 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1728 uint8_t *buf, int buf_size);
1729 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1730 const short *samples);
1731 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1732 const AVFrame *pict);
1734 int avcodec_close(AVCodecContext *avctx);
1736 void avcodec_register_all(void);
1738 void avcodec_flush_buffers(AVCodecContext *avctx);
1740 /* misc usefull functions */
1743 * returns a single letter to describe the picture type
1745 char av_get_pict_type_char(int pict_type);
1748 * reduce a fraction.
1749 * this is usefull for framerate calculations
1750 * @param max the maximum allowed for dst_nom & dst_den
1751 * @return 1 if exact, 0 otherwise
1753 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1756 * rescale a 64bit integer.
1757 * a simple a*b/c isnt possible as it can overflow
1759 int64_t av_rescale(int64_t a, int b, int c);
1763 * Interface for 0.5.0 version
1765 * do not even think about it's usage for this moment
1769 /// compressed size used from given memory buffer
1771 /// I/P/B frame type
1777 * order can't be changed - once it was defined
1781 AVC_OPEN_BY_NAME = 0xACA000,
1782 AVC_OPEN_BY_CODEC_ID,
1787 // pin - struct { uint8_t* src, uint_t src_size }
1788 // pout - struct { AVPicture* img, consumed_bytes,
1790 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1791 // pout - uint_t used_from_dest_size
1794 // query/get video commands
1795 AVC_GET_VERSION = 0xACB000,
1799 AVC_GET_QUANT_TABLE,
1802 // query/get audio commands
1803 AVC_GET_FRAME_SIZE = 0xABC000,
1805 // maybe define some simple structure which
1806 // might be passed to the user - but they can't
1807 // contain any codec specific parts and these
1808 // calls are usualy necessary only few times
1810 // set video commands
1811 AVC_SET_WIDTH = 0xACD000,
1814 // set video encoding commands
1815 AVC_SET_FRAME_RATE = 0xACD800,
1819 // set audio commands
1820 AVC_SET_SAMPLE_RATE = 0xACE000,
1826 * \param handle allocated private structure by libavcodec
1827 * for initialization pass NULL - will be returned pout
1828 * user is supposed to know nothing about its structure
1829 * \param cmd type of operation to be performed
1830 * \param pint input parameter
1831 * \param pout output parameter
1833 * \returns command status - eventually for query command it might return
1834 * integer resulting value
1836 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1839 void *av_malloc(unsigned int size);
1840 void *av_mallocz(unsigned int size);
1841 void *av_realloc(void *ptr, unsigned int size);
1842 void av_free(void *ptr);
1843 char *av_strdup(const char *s);
1844 void __av_freep(void **ptr);
1845 #define av_freep(p) __av_freep((void **)(p))
1846 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1847 /* for static data only */
1848 /* call av_free_static to release all staticaly allocated tables */
1849 void av_free_static(void);
1850 void *__av_mallocz_static(void** location, unsigned int size);
1851 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1853 /* add by bero : in adx.c */
1854 int is_adx(const unsigned char *buf,size_t bufsize);
1860 #define AV_LOG_ERROR 0
1861 #define AV_LOG_INFO 1
1862 #define AV_LOG_DEBUG 2
1864 extern void av_log(AVCodecContext*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
1865 extern void av_vlog(AVCodecContext*, int level, const char *fmt, va_list);
1866 extern int av_log_get_level(void);
1867 extern void av_log_set_level(int);
1868 extern void av_log_set_callback(void (*)(AVCodecContext*, int, const char*, va_list));
1870 #undef AV_LOG_TRAP_PRINTF
1871 #ifdef AV_LOG_TRAP_PRINTF
1872 #define printf DO NOT USE
1873 #define fprintf DO NOT USE
1875 #define stderr DO NOT USE
1882 #endif /* AVCODEC_H */