16 #define LIBAVCODEC_VERSION_INT 0x000406
17 #define LIBAVCODEC_VERSION "0.4.6"
18 #define LIBAVCODEC_BUILD 4668
19 #define LIBAVCODEC_BUILD_STR "4668"
21 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
60 /* various pcm "codecs" */
70 /* various adpcm codecs */
71 CODEC_ID_ADPCM_IMA_QT,
72 CODEC_ID_ADPCM_IMA_WAV,
80 CODEC_TYPE_UNKNOWN = -1,
91 PIX_FMT_RGB24, ///< 3 bytes, R is first
92 PIX_FMT_BGR24, ///< 3 bytes, B is first
95 PIX_FMT_RGBA32, ///< always stored in cpu endianness
98 PIX_FMT_RGB565, ///< always stored in cpu endianness
99 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
101 PIX_FMT_MONOWHITE, ///< 0 is white
102 PIX_FMT_MONOBLACK, ///< 0 is black
103 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
104 PIX_FMT_YUVJ420P, ///< YUV full scale (jpeg)
105 PIX_FMT_YUVJ422P, ///< YUV full scale (jpeg)
106 PIX_FMT_YUVJ444P, ///< YUV full scale (jpeg)
110 /* currently unused, may be used if 24/32 bits samples ever supported */
112 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
116 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
119 * Required number of zero bytes at the end of the input bitstream for decoding.
120 * to avoid overreading (and possibly segfaulting)
122 #define FF_INPUT_BUFFER_PADDING_SIZE 8
124 /* motion estimation type, EPZS by default */
134 typedef struct RcOverride{
137 int qscale; // if this is 0 then quality_factor will be used instead
138 float quality_factor;
141 /* only for ME compatiblity with old apps */
142 extern int motion_estimation_method;
144 /* ME algos sorted by quality */
145 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
146 ME_X1, ME_EPZS, ME_FULL };
149 #define FF_MAX_B_FRAMES 8
152 these flags can be passed in AVCodecContext.flags before initing
153 Note: note not everything is supported yet
156 #define CODEC_FLAG_HQ 0x0001 ///< brute force MB-type decission mode (slow)
157 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
158 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
159 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
160 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
161 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
162 /* parent program gurantees that the input for b-frame containing streams is not written to
163 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
164 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
165 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
166 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
167 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
168 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
169 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
170 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
171 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
172 of only at frame boundaries */
173 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
174 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
175 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay / will fail on b frames
176 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
177 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
178 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
179 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
180 /* Fx : Flag for h263+ extra options */
181 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< Advanced intra coding
182 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
183 /* For advanced prediction mode, we reuse the 4MV flag */
184 /* Unsupported options :
185 * Syntax Arithmetic coding (SAC)
186 * Deblocking filter internal loop
188 * Reference Picture Selection
189 * Independant Segment Decoding
190 * Alternative Inter * VLC
191 * Modified Quantization */
193 /* codec capabilities */
195 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
197 * Codec uses get_buffer() for allocating buffers.
198 * direct rendering method 1
200 #define CODEC_CAP_DR1 0x0002
201 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
203 #define CODEC_CAP_PARSE_ONLY 0x0004
204 #define CODEC_CAP_TRUNCATED 0x0008
206 #define FF_COMMON_FRAME \
208 * pointer to the picture planes.\
209 * this might be different from the first allocated byte\
216 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
217 * this isnt used by lavc unless the default get/release_buffer() is used\
223 * 1 -> keyframe, 0-> not\
224 * - encoding: set by lavc\
225 * - decoding: set by lavc\
230 * picture type of the frame, see ?_TYPE below.\
231 * - encoding: set by lavc for coded_picture (and set by user for input)\
232 * - decoding: set by lavc\
237 * presentation timestamp in micro seconds (time when frame should be shown to user)\
238 * if 0 then the frame_rate will be used as reference\
239 * - encoding: MUST be set by user\
240 * - decoding: set by lavc\
245 * picture number in bitstream order.\
246 * - encoding: set by\
247 * - decoding: set by lavc\
249 int coded_picture_number;\
251 * picture number in display order.\
252 * - encoding: set by\
253 * - decoding: set by lavc\
255 int display_picture_number;\
258 * quality (between 1 (good) and 31 (bad)) \
259 * - encoding: set by lavc for coded_picture (and set by user for input)\
260 * - decoding: set by lavc\
265 * buffer age (1->was last buffer and dint change, 2->..., ...).\
266 * set to something large if the buffer has not been used yet \
267 * - encoding: unused\
268 * - decoding: MUST be set by get_buffer()\
273 * is this picture used as reference\
274 * - encoding: unused\
275 * - decoding: set by lavc (before get_buffer() call))\
281 * - encoding: unused\
282 * - decoding: set by lavc\
284 int8_t *qscale_table;\
287 * - encoding: unused\
288 * - decoding: set by lavc\
293 * mbskip_table[mb]>=1 if MB didnt change\
294 * stride= mb_width = (width+15)>>4\
295 * - encoding: unused\
296 * - decoding: set by lavc\
298 uint8_t *mbskip_table;\
301 * for some private data of the user\
302 * - encoding: unused\
303 * - decoding: set by user\
309 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
310 * - decoding: unused\
315 * type of the buffer (to keep track of who has to dealloc data[*])\
316 * - encoding: set by the one who allocs it\
317 * - decoding: set by the one who allocs it\
318 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
323 * when decoding, this signal how much the picture must be delayed.\
324 * extra_delay = repeat_pict / (2*fps)\
325 * - encoding: unused\
326 * - decoding: set by lavc\
335 #define FF_QSCALE_TYPE_MPEG1 0
336 #define FF_QSCALE_TYPE_MPEG2 1
338 #define FF_BUFFER_TYPE_INTERNAL 1
339 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers
340 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc
343 #define FF_I_TYPE 1 // Intra
344 #define FF_P_TYPE 2 // Predicted
345 #define FF_B_TYPE 3 // Bi-dir predicted
346 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
353 typedef struct AVFrame {
357 #define DEFAULT_FRAME_RATE_BASE 1001000
360 * main external api structure.
362 typedef struct AVCodecContext {
364 * the average bitrate.
365 * - encoding: set by user. unused for constant quantizer encoding
366 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
371 * number of bits the bitstream is allowed to diverge from the reference.
372 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
373 * - encoding: set by user. unused for constant quantizer encoding
376 int bit_rate_tolerance;
380 * - encoding: set by user.
381 * - decoding: set by user.
386 * some codecs needs additionnal format info. It is stored here
387 * - encoding: set by user.
388 * - decoding: set by lavc. (FIXME is this ok?)
393 * motion estimation algorithm used for video coding.
394 * - encoding: MUST be set by user.
400 * some codecs need / can use extra-data like huffman tables.
401 * mjpeg: huffman tables
402 * rv10: additional flags
403 * mpeg4: global headers (they can be in the bitstream or here)
404 * - encoding: set/allocated/freed by lavc.
405 * - decoding: set/allocated/freed by user.
412 * frames per sec multiplied by frame_rate_base.
413 * for variable fps this is the precission, so if the timestamps
414 * can be specified in msec precssion then this is 1000*frame_rate_base
415 * - encoding: MUST be set by user
416 * - decoding: set by lavc. 0 or the frame_rate if available
422 * - encoding: MUST be set by user.
423 * - decoding: set by user, some codecs might override / change it during playback
427 #define FF_ASPECT_SQUARE 1
428 #define FF_ASPECT_4_3_625 2
429 #define FF_ASPECT_4_3_525 3
430 #define FF_ASPECT_16_9_625 4
431 #define FF_ASPECT_16_9_525 5
432 #define FF_ASPECT_EXTENDED 15
435 * the number of pictures in a group of pitures, or 0 for intra_only.
436 * - encoding: set by user.
442 * pixel format, see PIX_FMT_xxx.
444 * - decoding: set by lavc.
446 enum PixelFormat pix_fmt;
449 * Frame rate emulation. If not zero lower layer (i.e. format handler)
450 * has to read frames at native frame rate.
451 * - encoding: set by user.
452 * - decoding: unused.
457 * if non NULL, 'draw_horiz_band' is called by the libavcodec
458 * decoder to draw an horizontal band. It improve cache usage. Not
459 * all codecs can do that. You must check the codec capabilities
462 * - decoding: set by user.
464 void (*draw_horiz_band)(struct AVCodecContext *s,
465 uint8_t **src_ptr, int linesize,
466 int y, int width, int height);
469 int sample_rate; ///< samples per sec
471 int sample_fmt; ///< sample format, currenly unused
473 /* the following data should not be initialized */
474 int frame_size; ///< in samples, initialized when calling 'init'
475 int frame_number; ///< audio or video frame number
476 int real_pict_num; ///< returns the real picture number of previous encoded frame
479 * number of frames the decoded output will be delayed relative to
481 * - encoding: set by lavc.
486 /* - encoding parameters */
487 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
488 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
492 * - encoding: set by user.
499 * - encoding: set by user.
505 * maximum quantizer difference etween frames.
506 * - encoding: set by user.
512 * maximum number of b frames between non b frames.
513 * note: the output will be delayed by max_b_frames+1 relative to the input
514 * - encoding: set by user.
520 * qscale factor between ip and b frames.
521 * - encoding: set by user.
524 float b_quant_factor;
526 /** obsolete FIXME remove */
528 int b_frame_strategy;
533 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
537 struct AVCodec *codec;
541 /* The following data is for RTP friendly coding */
542 /* By now only H.263/H.263+/MPEG4 coder honours this */
543 int rtp_mode; /* 1 for activate RTP friendly-mode */
544 /* highers numbers represent more error-prone */
545 /* enviroments, by now just "1" exist */
547 int rtp_payload_size; /* The size of the RTP payload, the coder will */
548 /* do it's best to deliver a chunk with size */
549 /* below rtp_payload_size, the chunk will start */
550 /* with a start code on some codecs like H.263 */
551 /* This doesn't take account of any particular */
552 /* headers inside the transmited RTP payload */
555 /* The RTP callcack: This function is called */
556 /* every time the encoder as a packet to send */
557 /* Depends on the encoder if the data starts */
558 /* with a Start Code (it should) H.263 does */
559 void (*rtp_callback)(void *data, int size, int packet_number);
561 /* statistics, used for 2-pass encoding */
572 * number of bits used for the previously encoded frame.
573 * - encoding: set by lavc
579 * private data of the user, can be used to carry app specific stuff.
580 * - encoding: set by user
581 * - decoding: set by user
586 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
587 enum CodecID codec_id; /* see CODEC_ID_xxx */
590 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
591 * this is used to workaround some encoder bugs
593 * - decoding: set by user, will be converted to upper case by lavc during init
595 unsigned int codec_tag;
598 * workaround bugs in encoders which sometimes cannot be detected automatically.
600 * - decoding: set by user
603 #define FF_BUG_AUTODETECT 1 ///< autodetection
604 #define FF_BUG_OLD_MSMPEG4 2
605 #define FF_BUG_XVID_ILACE 4
606 #define FF_BUG_UMP4 8
607 #define FF_BUG_NO_PADDING 16
608 #define FF_BUG_AC_VLC 32
609 #define FF_BUG_QPEL_CHROMA 64
610 #define FF_BUG_STD_QPEL 128
611 #define FF_BUG_QPEL_CHROMA2 256
612 #define FF_BUG_DIRECT_BLOCKSIZE 512
613 #define FF_BUG_EDGE 1024
614 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
617 * luma single coeff elimination threshold.
618 * - encoding: set by user
621 int luma_elim_threshold;
624 * chroma single coeff elimination threshold.
625 * - encoding: set by user
628 int chroma_elim_threshold;
631 * strictly follow the std (MPEG4, ...).
632 * - encoding: set by user
635 int strict_std_compliance;
638 * qscale offset between ip and b frames.
639 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
640 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
641 * - encoding: set by user.
644 float b_quant_offset;
647 * error resilience higher values will detect more errors but may missdetect
648 * some more or less valid parts as errors.
650 * - decoding: set by user
652 int error_resilience;
653 #define FF_ER_CAREFULL 1
654 #define FF_ER_COMPLIANT 2
655 #define FF_ER_AGGRESSIVE 3
656 #define FF_ER_VERY_AGGRESSIVE 4
659 * called at the beginning of each frame to get a buffer for it.
660 * if pic.reference is set then the frame will be read later by lavc
662 * - decoding: set by lavc, user can override
664 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
667 * called to release buffers which where allocated with get_buffer.
668 * a released buffer can be reused in get_buffer()
669 * pic.data[*] must be set to NULL
671 * - decoding: set by lavc, user can override
673 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
676 * is 1 if the decoded stream contains b frames, 0 otherwise.
678 * - decoding: set by lavc
682 int block_align; ///< used by some WAV based audio codecs
684 int parse_only; /* - decoding only: if true, only parsing is done
685 (function avcodec_parse_frame()). The frame
686 data is returned. Only MPEG codecs support this now. */
689 * 0-> h263 quant 1-> mpeg quant.
690 * - encoding: set by user.
696 * pass1 encoding statistics output buffer.
697 * - encoding: set by lavc
703 * pass2 encoding statistics input buffer.
704 * concatenated stuff from stats_out of pass1 should be placed here
705 * - encoding: allocated/set/freed by user
711 * ratecontrol qmin qmax limiting method.
712 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
713 * - encoding: set by user.
722 * ratecontrol override, see RcOverride.
723 * - encoding: allocated/set/freed by user.
726 RcOverride *rc_override;
727 int rc_override_count;
730 * rate control equation.
731 * - encoding: set by user
738 * - encoding: set by user.
745 * - encoding: set by user.
751 * decoder bitstream buffer size.
752 * - encoding: set by user.
756 float rc_buffer_aggressivity;
759 * qscale factor between p and i frames.
760 * - encoding: set by user.
763 float i_quant_factor;
766 * qscale offset between p and i frames.
767 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
768 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
769 * - encoding: set by user.
772 float i_quant_offset;
775 * initial complexity for pass1 ratecontrol.
776 * - encoding: set by user.
779 float rc_initial_cplx;
782 * dct algorithm, see FF_DCT_* below.
783 * - encoding: set by user
787 #define FF_DCT_AUTO 0
788 #define FF_DCT_FASTINT 1
791 #define FF_DCT_MLIB 4
792 #define FF_DCT_ALTIVEC 5
795 * luminance masking (0-> disabled).
796 * - encoding: set by user
802 * temporary complexity masking (0-> disabled).
803 * - encoding: set by user
806 float temporal_cplx_masking;
809 * spatial complexity masking (0-> disabled).
810 * - encoding: set by user
813 float spatial_cplx_masking;
816 * p block masking (0-> disabled).
817 * - encoding: set by user
823 * darkness masking (0-> disabled).
824 * - encoding: set by user
830 /* for binary compatibility */
834 * idct algorithm, see FF_IDCT_* below.
835 * - encoding: set by user
836 * - decoding: set by user
839 #define FF_IDCT_AUTO 0
840 #define FF_IDCT_INT 1
841 #define FF_IDCT_SIMPLE 2
842 #define FF_IDCT_SIMPLEMMX 3
843 #define FF_IDCT_LIBMPEG2MMX 4
844 #define FF_IDCT_PS2 5
845 #define FF_IDCT_MLIB 6
846 #define FF_IDCT_ARM 7
847 #define FF_IDCT_ALTIVEC 8
848 #define FF_IDCT_SH4 9
852 * - encoding: set by lavc
853 * - decoding: set by user (or 0)
857 * slice offsets in the frame in bytes.
858 * - encoding: set/allocated by lavc
859 * - decoding: set/allocated by user (or NULL)
864 * error concealment flags.
866 * - decoding: set by user
868 int error_concealment;
869 #define FF_EC_GUESS_MVS 1
870 #define FF_EC_DEBLOCK 2
873 * dsp_mask could be add used to disable unwanted CPU features
874 * CPU features (i.e. MMX, SSE. ...)
876 * with FORCE flag you may instead enable given CPU features
877 * (Dangerous: usable in case of misdetection, improper usage however will
878 * result into program crash)
881 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
882 /* lower 16 bits - CPU features */
884 #define FF_MM_MMX 0x0001 /* standard MMX */
885 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
886 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
887 #define FF_MM_SSE 0x0008 /* SSE functions */
888 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
889 #endif /* HAVE_MMX */
892 * bits per sample/pixel from the demuxer (needed for huffyuv).
893 * - encoding: set by lavc
894 * - decoding: set by user
899 * prediction method (needed for huffyuv).
900 * - encoding: set by user
903 int prediction_method;
904 #define FF_PRED_LEFT 0
905 #define FF_PRED_PLANE 1
906 #define FF_PRED_MEDIAN 2
909 * aspect ratio (0 if unknown).
910 * - encoding: set by user.
911 * - decoding: set by lavc.
916 * the picture in the bitstream.
917 * - encoding: set by lavc
918 * - decoding: set by lavc
920 AVFrame *coded_frame;
924 * - encoding: set by user.
925 * - decoding: set by user.
928 #define FF_DEBUG_PICT_INFO 1
929 #define FF_DEBUG_RC 2
930 #define FF_DEBUG_BITSTREAM 4
931 #define FF_DEBUG_MB_TYPE 8
932 #define FF_DEBUG_QP 16
933 #define FF_DEBUG_MV 32
934 #define FF_DEBUG_VIS_MV 0x00000040
935 #define FF_DEBUG_SKIP 0x00000080
936 #define FF_DEBUG_STARTCODE 0x00000100
937 #define FF_DEBUG_PTS 0x00000200
938 #define FF_DEBUG_ER 0x00000400
939 #define FF_DEBUG_MMCO 0x00000800
943 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
949 * minimum MB quantizer.
950 * - encoding: set by user.
956 * maximum MB quantizer.
957 * - encoding: set by user.
963 * motion estimation compare function.
964 * - encoding: set by user.
969 * subpixel motion estimation compare function.
970 * - encoding: set by user.
975 * macroblock compare function (not supported yet).
976 * - encoding: set by user.
982 #define FF_CMP_SATD 2
984 #define FF_CMP_PSNR 4
987 #define FF_CMP_ZERO 7
988 #define FF_CMP_CHROMA 256
991 * ME diamond size & shape.
992 * - encoding: set by user.
998 * amount of previous MV predictors (2a+1 x 2a+1 square).
999 * - encoding: set by user.
1000 * - decoding: unused
1002 int last_predictor_count;
1005 * pre pass for motion estimation.
1006 * - encoding: set by user.
1007 * - decoding: unused
1012 * motion estimation pre pass compare function.
1013 * - encoding: set by user.
1014 * - decoding: unused
1019 * ME pre pass diamond size & shape.
1020 * - encoding: set by user.
1021 * - decoding: unused
1026 * subpel ME quality.
1027 * - encoding: set by user.
1028 * - decoding: unused
1030 int me_subpel_quality;
1033 * callback to negotiate the pixelFormat.
1034 * @param fmt is the list of formats which are supported by the codec,
1035 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1036 * the first is allways the native one
1037 * @return the choosen format
1038 * - encoding: unused
1039 * - decoding: set by user, if not set then the native format will always be choosen
1041 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1044 * DTG active format information (additionnal aspect ratio
1045 * information only used in DVB MPEG2 transport streams). 0 if
1048 * - encoding: unused.
1049 * - decoding: set by decoder
1051 int dtg_active_format;
1052 #define FF_DTG_AFD_SAME 8
1053 #define FF_DTG_AFD_4_3 9
1054 #define FF_DTG_AFD_16_9 10
1055 #define FF_DTG_AFD_14_9 11
1056 #define FF_DTG_AFD_4_3_SP_14_9 13
1057 #define FF_DTG_AFD_16_9_SP_14_9 14
1058 #define FF_DTG_AFD_SP_4_3 15
1061 * Maximum motion estimation search range in subpel units.
1062 * if 0 then no limit
1064 * - encoding: set by user.
1065 * - decoding: unused.
1071 * for variable fps this is 1
1072 * - encoding: set by user.
1073 * - decoding: set by lavc.
1074 * @todo move this after frame_rate
1077 int frame_rate_base;
1079 * intra quantizer bias.
1080 * - encoding: set by user.
1081 * - decoding: unused
1083 int intra_quant_bias;
1084 #define FF_DEFAULT_QUANT_BIAS 999999
1087 * inter quantizer bias.
1088 * - encoding: set by user.
1089 * - decoding: unused
1091 int inter_quant_bias;
1095 * - encoding: unused.
1096 * - decoding: which clrtable should be used for 8bit RGB images
1097 * table have to be stored somewhere FIXME
1102 * internal_buffer count.
1103 * Dont touch, used by lavc default_get_buffer()
1105 int internal_buffer_count;
1109 * Dont touch, used by lavc default_get_buffer()
1111 void *internal_buffer;
1113 #define FF_QUALITY_SCALE 256
1115 * global quality for codecs which cannot change it per frame.
1116 * this should be proportional to MPEG1/2/4 qscale.
1117 * - encoding: set by user.
1118 * - decoding: unused
1127 typedef struct AVOption {
1128 /** options' name */
1129 const char *name; /* if name is NULL, it indicates a link to next */
1130 /** short English text help or const struct AVOption* subpointer */
1131 const char *help; // const struct AVOption* sub;
1132 /** offset to context structure where the parsed value should be stored */
1134 /** options' type */
1136 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1137 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1138 #define FF_OPT_TYPE_INT 3 ///< integer
1139 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1140 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1141 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1142 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1143 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1144 /** min value (min == max -> no limits) */
1146 /** maximum value for double/int */
1148 /** default boo [0,1]l/double/int value */
1151 * default string value (with optional semicolon delimited extra option-list
1152 * i.e. option1;option2;option3
1153 * defval might select other then first argument as default
1156 #define FF_OPT_MAX_DEPTH 10
1160 * Parse option(s) and sets fields in passed structure
1161 * @param strct structure where the parsed results will be written
1162 * @param list list with AVOptions
1163 * @param opts string with options for parsing
1165 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1171 typedef struct AVCodec {
1173 enum CodecType type;
1176 int (*init)(AVCodecContext *);
1177 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1178 int (*close)(AVCodecContext *);
1179 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1180 uint8_t *buf, int buf_size);
1182 const AVOption *options;
1183 struct AVCodec *next;
1187 * four components are given, that's all.
1188 * the last component is alpha
1190 typedef struct AVPicture {
1195 extern AVCodec ac3_encoder;
1196 extern AVCodec mp2_encoder;
1197 extern AVCodec mp3lame_encoder;
1198 extern AVCodec oggvorbis_encoder;
1199 extern AVCodec mpeg1video_encoder;
1200 extern AVCodec h263_encoder;
1201 extern AVCodec h263p_encoder;
1202 extern AVCodec rv10_encoder;
1203 extern AVCodec mjpeg_encoder;
1204 extern AVCodec mpeg4_encoder;
1205 extern AVCodec msmpeg4v1_encoder;
1206 extern AVCodec msmpeg4v2_encoder;
1207 extern AVCodec msmpeg4v3_encoder;
1208 extern AVCodec wmv1_encoder;
1209 extern AVCodec wmv2_encoder;
1210 extern AVCodec huffyuv_encoder;
1211 extern AVCodec h264_encoder;
1212 extern AVCodec asv1_encoder;
1214 extern AVCodec h263_decoder;
1215 extern AVCodec mpeg4_decoder;
1216 extern AVCodec msmpeg4v1_decoder;
1217 extern AVCodec msmpeg4v2_decoder;
1218 extern AVCodec msmpeg4v3_decoder;
1219 extern AVCodec wmv1_decoder;
1220 extern AVCodec wmv2_decoder;
1221 extern AVCodec mpeg_decoder;
1222 extern AVCodec h263i_decoder;
1223 extern AVCodec rv10_decoder;
1224 extern AVCodec svq1_decoder;
1225 extern AVCodec svq3_decoder;
1226 extern AVCodec dvvideo_decoder;
1227 extern AVCodec dvaudio_decoder;
1228 extern AVCodec wmav1_decoder;
1229 extern AVCodec wmav2_decoder;
1230 extern AVCodec mjpeg_decoder;
1231 extern AVCodec mjpegb_decoder;
1232 extern AVCodec mp2_decoder;
1233 extern AVCodec mp3_decoder;
1234 extern AVCodec mace3_decoder;
1235 extern AVCodec mace6_decoder;
1236 extern AVCodec huffyuv_decoder;
1237 extern AVCodec oggvorbis_decoder;
1238 extern AVCodec cyuv_decoder;
1239 extern AVCodec h264_decoder;
1240 extern AVCodec indeo3_decoder;
1241 extern AVCodec vp3_decoder;
1242 extern AVCodec amr_nb_decoder;
1243 extern AVCodec aac_decoder;
1244 extern AVCodec mpeg4aac_decoder;
1245 extern AVCodec asv1_decoder;
1248 #define PCM_CODEC(id, name) \
1249 extern AVCodec name ## _decoder; \
1250 extern AVCodec name ## _encoder
1252 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1253 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1254 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1255 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1256 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1257 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1258 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1259 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1263 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1264 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1265 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1269 /* dummy raw video codec */
1270 extern AVCodec rawvideo_encoder;
1271 extern AVCodec rawvideo_decoder;
1273 /* the following codecs use external GPL libs */
1274 extern AVCodec ac3_decoder;
1278 struct ReSampleContext;
1280 typedef struct ReSampleContext ReSampleContext;
1282 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1283 int output_rate, int input_rate);
1284 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1285 void audio_resample_close(ReSampleContext *s);
1287 /* YUV420 format is assumed ! */
1289 struct ImgReSampleContext;
1291 typedef struct ImgReSampleContext ImgReSampleContext;
1293 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1294 int input_width, int input_height);
1296 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1297 int iwidth, int iheight,
1298 int topBand, int bottomBand,
1299 int leftBand, int rightBand);
1301 void img_resample(ImgReSampleContext *s,
1302 AVPicture *output, AVPicture *input);
1304 void img_resample_close(ImgReSampleContext *s);
1306 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1307 int pix_fmt, int width, int height);
1308 int avpicture_layout(AVPicture* src, int pix_fmt, int width, int height,
1309 unsigned char *dest, int dest_size);
1310 int avpicture_get_size(int pix_fmt, int width, int height);
1311 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1312 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1313 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1315 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1316 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1317 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1318 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1319 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1320 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1322 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1324 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1325 int has_alpha, int *loss_ptr);
1327 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1328 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1329 int img_get_alpha_info(AVPicture *src, int pix_fmt, int width, int height);
1331 /* convert among pixel formats */
1332 int img_convert(AVPicture *dst, int dst_pix_fmt,
1333 AVPicture *src, int pix_fmt,
1334 int width, int height);
1336 /* deinterlace a picture */
1337 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
1338 int pix_fmt, int width, int height);
1340 /* external high level API */
1342 extern AVCodec *first_avcodec;
1344 /* returns LIBAVCODEC_VERSION_INT constant */
1345 unsigned avcodec_version(void);
1346 /* returns LIBAVCODEC_BUILD constant */
1347 unsigned avcodec_build(void);
1348 void avcodec_init(void);
1350 void register_avcodec(AVCodec *format);
1351 AVCodec *avcodec_find_encoder(enum CodecID id);
1352 AVCodec *avcodec_find_encoder_by_name(const char *name);
1353 AVCodec *avcodec_find_decoder(enum CodecID id);
1354 AVCodec *avcodec_find_decoder_by_name(const char *name);
1355 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1357 void avcodec_get_context_defaults(AVCodecContext *s);
1358 AVCodecContext *avcodec_alloc_context(void);
1359 AVFrame *avcodec_alloc_frame(void);
1361 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1362 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1363 void avcodec_default_free_buffers(AVCodecContext *s);
1365 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1366 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1367 int *frame_size_ptr,
1368 uint8_t *buf, int buf_size);
1369 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1370 int *got_picture_ptr,
1371 uint8_t *buf, int buf_size);
1372 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1374 uint8_t *buf, int buf_size);
1375 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1376 const short *samples);
1377 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1378 const AVFrame *pict);
1380 int avcodec_close(AVCodecContext *avctx);
1382 void avcodec_register_all(void);
1384 void avcodec_flush_buffers(AVCodecContext *avctx);
1386 /* misc usefull functions */
1389 * returns a single letter to describe the picture type
1391 char av_get_pict_type_char(int pict_type);
1394 * reduce a fraction.
1395 * this is usefull for framerate calculations
1396 * @param max the maximum allowed for dst_nom & dst_den
1397 * @return 1 if exact, 0 otherwise
1399 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1402 * rescale a 64bit integer.
1403 * a simple a*b/c isnt possible as it can overflow
1405 int64_t av_rescale(int64_t a, int b, int c);
1409 * Interface for 0.5.0 version
1411 * do not even think about it's usage for this moment
1415 /// compressed size used from given memory buffer
1417 /// I/P/B frame type
1423 * order can't be changed - once it was defined
1427 AVC_OPEN_BY_NAME = 0xACA000,
1428 AVC_OPEN_BY_CODEC_ID,
1433 // pin - struct { uint8_t* src, uint_t src_size }
1434 // pout - struct { AVPicture* img, consumed_bytes,
1436 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1437 // pout - uint_t used_from_dest_size
1440 // query/get video commands
1441 AVC_GET_VERSION = 0xACB000,
1445 AVC_GET_QUANT_TABLE,
1448 // query/get audio commands
1449 AVC_GET_FRAME_SIZE = 0xABC000,
1451 // maybe define some simple structure which
1452 // might be passed to the user - but they can't
1453 // contain any codec specific parts and these
1454 // calls are usualy necessary only few times
1456 // set video commands
1457 AVC_SET_WIDTH = 0xACD000,
1460 // set video encoding commands
1461 AVC_SET_FRAME_RATE = 0xACD800,
1465 // set audio commands
1466 AVC_SET_SAMPLE_RATE = 0xACE000,
1472 * \param handle allocated private structure by libavcodec
1473 * for initialization pass NULL - will be returned pout
1474 * user is supposed to know nothing about its structure
1475 * \param cmd type of operation to be performed
1476 * \param pint input parameter
1477 * \param pout output parameter
1479 * \returns command status - eventually for query command it might return
1480 * integer resulting value
1482 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1485 void *av_malloc(unsigned int size);
1486 void *av_mallocz(unsigned int size);
1487 void *av_realloc(void *ptr, unsigned int size);
1488 void av_free(void *ptr);
1489 char *av_strdup(const char *s);
1490 void __av_freep(void **ptr);
1491 #define av_freep(p) __av_freep((void **)(p))
1492 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1493 /* for static data only */
1494 /* call av_free_static to release all staticaly allocated tables */
1495 void av_free_static(void);
1496 void *__av_mallocz_static(void** location, unsigned int size);
1497 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1503 #endif /* AVCODEC_H */