2 * Interface to MP3 LAME encoding engine
4 * Copyright (c) 1999 Mark Taylor
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
22 /* $Id: lame.h,v 1.189 2011/10/02 14:52:20 robert Exp $ */
27 /* for size_t typedef */
29 /* for va_list typedef */
31 /* for FILE typedef, TODO: remove when removing lame_mp3_tags_fid */
34 #if defined(__cplusplus)
38 typedef void (*lame_report_function)(const char *format, va_list ap);
40 #if defined(WIN32) || defined(_WIN32)
47 #define DEPRECATED_OR_OBSOLETE_CODE_REMOVED 1
49 typedef enum vbr_mode_e {
51 vbr_mt, /* obsolete, same as vbr_mtrh */
55 vbr_max_indicator, /* Don't use this! It's used for sanity checks. */
56 vbr_default=vbr_mtrh /* change this to change the default VBR mode of LAME */
61 typedef enum MPEG_mode_e {
64 DUAL_CHANNEL, /* LAME doesn't supports this! */
67 MAX_INDICATOR /* Don't use this! It's used for sanity checks. */
71 typedef enum Padding_type_e {
75 PAD_MAX_INDICATOR /* Don't use this! It's used for sanity checks. */
81 typedef enum preset_mode_e {
82 /*values from 8 to 320 should be reserved for abr bitrates*/
83 /*for abr I'd suggest to directly use the targeted bitrate as a value*/
87 V9 = 410, /*Vx to match Lame and VBR_xx to match FhG*/
110 /*still there for compatibility*/
115 STANDARD_FAST = 1004,
122 /*asm optimizations*/
123 typedef enum asm_optimizations_e {
130 /* psychoacoustic model */
131 typedef enum Psy_model_e {
137 /* buffer considerations */
138 typedef enum buffer_constraint_e {
145 struct lame_global_struct;
146 typedef struct lame_global_struct lame_global_flags;
147 typedef lame_global_flags *lame_t;
152 /***********************************************************************
155 * These functions should be called, in this order, for each
156 * MP3 file to be encoded. See the file "API" for more documentation
158 ***********************************************************************/
163 * initialize the encoder. sets default for all encoder parameters,
164 * returns NULL if some malloc()'s failed
165 * otherwise returns pointer to structure needed for all future
168 lame_global_flags * CDECL lame_init(void);
169 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
171 /* obsolete version */
172 int CDECL lame_init_old(lame_global_flags *);
177 * set as needed to override defaults
180 /********************************************************************
181 * input stream description
182 ***********************************************************************/
183 /* number of samples. default = 2^32-1 */
184 int CDECL lame_set_num_samples(lame_global_flags *, unsigned long);
185 unsigned long CDECL lame_get_num_samples(const lame_global_flags *);
187 /* input sample rate in Hz. default = 44100hz */
188 int CDECL lame_set_in_samplerate(lame_global_flags *, int);
189 int CDECL lame_get_in_samplerate(const lame_global_flags *);
191 /* number of channels in input stream. default=2 */
192 int CDECL lame_set_num_channels(lame_global_flags *, int);
193 int CDECL lame_get_num_channels(const lame_global_flags *);
196 scale the input by this amount before encoding. default=1
197 (not used by decoding routines)
199 int CDECL lame_set_scale(lame_global_flags *, float);
200 float CDECL lame_get_scale(const lame_global_flags *);
203 scale the channel 0 (left) input by this amount before encoding. default=1
204 (not used by decoding routines)
206 int CDECL lame_set_scale_left(lame_global_flags *, float);
207 float CDECL lame_get_scale_left(const lame_global_flags *);
210 scale the channel 1 (right) input by this amount before encoding. default=1
211 (not used by decoding routines)
213 int CDECL lame_set_scale_right(lame_global_flags *, float);
214 float CDECL lame_get_scale_right(const lame_global_flags *);
217 output sample rate in Hz. default = 0, which means LAME picks best value
218 based on the amount of compression. MPEG only allows:
219 MPEG1 32, 44.1, 48khz
221 MPEG2.5 8, 11.025, 12
222 (not used by decoding routines)
224 int CDECL lame_set_out_samplerate(lame_global_flags *, int);
225 int CDECL lame_get_out_samplerate(const lame_global_flags *);
228 /********************************************************************
229 * general control parameters
230 ***********************************************************************/
231 /* 1=cause LAME to collect data for an MP3 frame analyzer. default=0 */
232 int CDECL lame_set_analysis(lame_global_flags *, int);
233 int CDECL lame_get_analysis(const lame_global_flags *);
236 1 = write a Xing VBR header frame.
238 this variable must have been added by a Hungarian notation Windows programmer :-)
240 int CDECL lame_set_bWriteVbrTag(lame_global_flags *, int);
241 int CDECL lame_get_bWriteVbrTag(const lame_global_flags *);
243 /* 1=decode only. use lame/mpglib to convert mp3/ogg to wav. default=0 */
244 int CDECL lame_set_decode_only(lame_global_flags *, int);
245 int CDECL lame_get_decode_only(const lame_global_flags *);
247 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
249 /* 1=encode a Vorbis .ogg file. default=0 */
251 int CDECL lame_set_ogg(lame_global_flags *, int);
252 int CDECL lame_get_ogg(const lame_global_flags *);
256 internal algorithm selection. True quality is determined by the bitrate
257 but this variable will effect quality by selecting expensive or cheap algorithms.
258 quality=0..9. 0=best (very slow). 9=worst.
259 recommended: 2 near-best quality, not too slow
261 7 ok quality, really fast
263 int CDECL lame_set_quality(lame_global_flags *, int);
264 int CDECL lame_get_quality(const lame_global_flags *);
267 mode = 0,1,2,3 = stereo, jstereo, dual channel (not supported), mono
268 default: lame picks based on compression ration and input channels
270 int CDECL lame_set_mode(lame_global_flags *, MPEG_mode);
271 MPEG_mode CDECL lame_get_mode(const lame_global_flags *);
273 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
276 mode_automs. Use a M/S mode with a switching threshold based on
280 int CDECL lame_set_mode_automs(lame_global_flags *, int);
281 int CDECL lame_get_mode_automs(const lame_global_flags *);
285 force_ms. Force M/S for all frames. For testing only.
286 default = 0 (disabled)
288 int CDECL lame_set_force_ms(lame_global_flags *, int);
289 int CDECL lame_get_force_ms(const lame_global_flags *);
291 /* use free_format? default = 0 (disabled) */
292 int CDECL lame_set_free_format(lame_global_flags *, int);
293 int CDECL lame_get_free_format(const lame_global_flags *);
295 /* perform ReplayGain analysis? default = 0 (disabled) */
296 int CDECL lame_set_findReplayGain(lame_global_flags *, int);
297 int CDECL lame_get_findReplayGain(const lame_global_flags *);
299 /* decode on the fly. Search for the peak sample. If the ReplayGain
300 * analysis is enabled then perform the analysis on the decoded data
301 * stream. default = 0 (disabled)
302 * NOTE: if this option is set the build-in decoder should not be used */
303 int CDECL lame_set_decode_on_the_fly(lame_global_flags *, int);
304 int CDECL lame_get_decode_on_the_fly(const lame_global_flags *);
306 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
308 /* DEPRECATED: now does the same as lame_set_findReplayGain()
309 default = 0 (disabled) */
310 int CDECL lame_set_ReplayGain_input(lame_global_flags *, int);
311 int CDECL lame_get_ReplayGain_input(const lame_global_flags *);
313 /* DEPRECATED: now does the same as
314 lame_set_decode_on_the_fly() && lame_set_findReplayGain()
315 default = 0 (disabled) */
316 int CDECL lame_set_ReplayGain_decode(lame_global_flags *, int);
317 int CDECL lame_get_ReplayGain_decode(const lame_global_flags *);
319 /* DEPRECATED: now does the same as lame_set_decode_on_the_fly()
320 default = 0 (disabled) */
321 int CDECL lame_set_findPeakSample(lame_global_flags *, int);
322 int CDECL lame_get_findPeakSample(const lame_global_flags *);
325 /* counters for gapless encoding */
326 int CDECL lame_set_nogap_total(lame_global_flags*, int);
327 int CDECL lame_get_nogap_total(const lame_global_flags*);
329 int CDECL lame_set_nogap_currentindex(lame_global_flags* , int);
330 int CDECL lame_get_nogap_currentindex(const lame_global_flags*);
335 * Set printf like error/debug/message reporting functions.
336 * The second argument has to be a pointer to a function which looks like
337 * void my_debugf(const char *format, va_list ap)
339 * (void) vfprintf(stdout, format, ap);
341 * If you use NULL as the value of the pointer in the set function, the
342 * lame buildin function will be used (prints to stderr).
343 * To quiet any output you have to replace the body of the example function
344 * with just "return;" and use it in the set function.
346 int CDECL lame_set_errorf(lame_global_flags *, lame_report_function);
347 int CDECL lame_set_debugf(lame_global_flags *, lame_report_function);
348 int CDECL lame_set_msgf (lame_global_flags *, lame_report_function);
352 /* set one of brate compression ratio. default is compression ratio of 11. */
353 int CDECL lame_set_brate(lame_global_flags *, int);
354 int CDECL lame_get_brate(const lame_global_flags *);
355 int CDECL lame_set_compression_ratio(lame_global_flags *, float);
356 float CDECL lame_get_compression_ratio(const lame_global_flags *);
359 int CDECL lame_set_preset( lame_global_flags* gfp, int );
360 int CDECL lame_set_asm_optimizations( lame_global_flags* gfp, int, int );
364 /********************************************************************
366 ***********************************************************************/
367 /* mark as copyright. default=0 */
368 int CDECL lame_set_copyright(lame_global_flags *, int);
369 int CDECL lame_get_copyright(const lame_global_flags *);
371 /* mark as original. default=1 */
372 int CDECL lame_set_original(lame_global_flags *, int);
373 int CDECL lame_get_original(const lame_global_flags *);
375 /* error_protection. Use 2 bytes from each frame for CRC checksum. default=0 */
376 int CDECL lame_set_error_protection(lame_global_flags *, int);
377 int CDECL lame_get_error_protection(const lame_global_flags *);
379 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
381 /* padding_type. 0=pad no frames 1=pad all frames 2=adjust padding(default) */
382 int CDECL lame_set_padding_type(lame_global_flags *, Padding_type);
383 Padding_type CDECL lame_get_padding_type(const lame_global_flags *);
386 /* MP3 'private extension' bit Meaningless. default=0 */
387 int CDECL lame_set_extension(lame_global_flags *, int);
388 int CDECL lame_get_extension(const lame_global_flags *);
390 /* enforce strict ISO compliance. default=0 */
391 int CDECL lame_set_strict_ISO(lame_global_flags *, int);
392 int CDECL lame_get_strict_ISO(const lame_global_flags *);
395 /********************************************************************
396 * quantization/noise shaping
397 ***********************************************************************/
399 /* disable the bit reservoir. For testing only. default=0 */
400 int CDECL lame_set_disable_reservoir(lame_global_flags *, int);
401 int CDECL lame_get_disable_reservoir(const lame_global_flags *);
403 /* select a different "best quantization" function. default=0 */
404 int CDECL lame_set_quant_comp(lame_global_flags *, int);
405 int CDECL lame_get_quant_comp(const lame_global_flags *);
406 int CDECL lame_set_quant_comp_short(lame_global_flags *, int);
407 int CDECL lame_get_quant_comp_short(const lame_global_flags *);
409 int CDECL lame_set_experimentalX(lame_global_flags *, int); /* compatibility*/
410 int CDECL lame_get_experimentalX(const lame_global_flags *);
412 /* another experimental option. for testing only */
413 int CDECL lame_set_experimentalY(lame_global_flags *, int);
414 int CDECL lame_get_experimentalY(const lame_global_flags *);
416 /* another experimental option. for testing only */
417 int CDECL lame_set_experimentalZ(lame_global_flags *, int);
418 int CDECL lame_get_experimentalZ(const lame_global_flags *);
420 /* Naoki's psycho acoustic model. default=0 */
421 int CDECL lame_set_exp_nspsytune(lame_global_flags *, int);
422 int CDECL lame_get_exp_nspsytune(const lame_global_flags *);
424 void CDECL lame_set_msfix(lame_global_flags *, double);
425 float CDECL lame_get_msfix(const lame_global_flags *);
428 /********************************************************************
430 ***********************************************************************/
431 /* Types of VBR. default = vbr_off = CBR */
432 int CDECL lame_set_VBR(lame_global_flags *, vbr_mode);
433 vbr_mode CDECL lame_get_VBR(const lame_global_flags *);
435 /* VBR quality level. 0=highest 9=lowest */
436 int CDECL lame_set_VBR_q(lame_global_flags *, int);
437 int CDECL lame_get_VBR_q(const lame_global_flags *);
439 /* VBR quality level. 0=highest 9=lowest, Range [0,...,10[ */
440 int CDECL lame_set_VBR_quality(lame_global_flags *, float);
441 float CDECL lame_get_VBR_quality(const lame_global_flags *);
443 /* Ignored except for VBR=vbr_abr (ABR mode) */
444 int CDECL lame_set_VBR_mean_bitrate_kbps(lame_global_flags *, int);
445 int CDECL lame_get_VBR_mean_bitrate_kbps(const lame_global_flags *);
447 int CDECL lame_set_VBR_min_bitrate_kbps(lame_global_flags *, int);
448 int CDECL lame_get_VBR_min_bitrate_kbps(const lame_global_flags *);
450 int CDECL lame_set_VBR_max_bitrate_kbps(lame_global_flags *, int);
451 int CDECL lame_get_VBR_max_bitrate_kbps(const lame_global_flags *);
454 1=strictly enforce VBR_min_bitrate. Normally it will be violated for
457 int CDECL lame_set_VBR_hard_min(lame_global_flags *, int);
458 int CDECL lame_get_VBR_hard_min(const lame_global_flags *);
461 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
463 int CDECL lame_set_preset_expopts(lame_global_flags *, int);
466 /********************************************************************
468 ***********************************************************************/
469 /* freq in Hz to apply lowpass. Default = 0 = lame chooses. -1 = disabled */
470 int CDECL lame_set_lowpassfreq(lame_global_flags *, int);
471 int CDECL lame_get_lowpassfreq(const lame_global_flags *);
472 /* width of transition band, in Hz. Default = one polyphase filter band */
473 int CDECL lame_set_lowpasswidth(lame_global_flags *, int);
474 int CDECL lame_get_lowpasswidth(const lame_global_flags *);
476 /* freq in Hz to apply highpass. Default = 0 = lame chooses. -1 = disabled */
477 int CDECL lame_set_highpassfreq(lame_global_flags *, int);
478 int CDECL lame_get_highpassfreq(const lame_global_flags *);
479 /* width of transition band, in Hz. Default = one polyphase filter band */
480 int CDECL lame_set_highpasswidth(lame_global_flags *, int);
481 int CDECL lame_get_highpasswidth(const lame_global_flags *);
484 /********************************************************************
485 * psycho acoustics and other arguments which you should not change
486 * unless you know what you are doing
487 ***********************************************************************/
489 /* only use ATH for masking */
490 int CDECL lame_set_ATHonly(lame_global_flags *, int);
491 int CDECL lame_get_ATHonly(const lame_global_flags *);
493 /* only use ATH for short blocks */
494 int CDECL lame_set_ATHshort(lame_global_flags *, int);
495 int CDECL lame_get_ATHshort(const lame_global_flags *);
498 int CDECL lame_set_noATH(lame_global_flags *, int);
499 int CDECL lame_get_noATH(const lame_global_flags *);
501 /* select ATH formula */
502 int CDECL lame_set_ATHtype(lame_global_flags *, int);
503 int CDECL lame_get_ATHtype(const lame_global_flags *);
505 /* lower ATH by this many db */
506 int CDECL lame_set_ATHlower(lame_global_flags *, float);
507 float CDECL lame_get_ATHlower(const lame_global_flags *);
509 /* select ATH adaptive adjustment type */
510 int CDECL lame_set_athaa_type( lame_global_flags *, int);
511 int CDECL lame_get_athaa_type( const lame_global_flags *);
513 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
515 /* select the loudness approximation used by the ATH adaptive auto-leveling */
516 int CDECL lame_set_athaa_loudapprox( lame_global_flags *, int);
517 int CDECL lame_get_athaa_loudapprox( const lame_global_flags *);
520 /* adjust (in dB) the point below which adaptive ATH level adjustment occurs */
521 int CDECL lame_set_athaa_sensitivity( lame_global_flags *, float);
522 float CDECL lame_get_athaa_sensitivity( const lame_global_flags* );
524 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
526 /* OBSOLETE: predictability limit (ISO tonality formula) */
527 int CDECL lame_set_cwlimit(lame_global_flags *, int);
528 int CDECL lame_get_cwlimit(const lame_global_flags *);
532 allow blocktypes to differ between channels?
533 default: 0 for jstereo, 1 for stereo
535 int CDECL lame_set_allow_diff_short(lame_global_flags *, int);
536 int CDECL lame_get_allow_diff_short(const lame_global_flags *);
538 /* use temporal masking effect (default = 1) */
539 int CDECL lame_set_useTemporal(lame_global_flags *, int);
540 int CDECL lame_get_useTemporal(const lame_global_flags *);
542 /* use temporal masking effect (default = 1) */
543 int CDECL lame_set_interChRatio(lame_global_flags *, float);
544 float CDECL lame_get_interChRatio(const lame_global_flags *);
546 /* disable short blocks */
547 int CDECL lame_set_no_short_blocks(lame_global_flags *, int);
548 int CDECL lame_get_no_short_blocks(const lame_global_flags *);
550 /* force short blocks */
551 int CDECL lame_set_force_short_blocks(lame_global_flags *, int);
552 int CDECL lame_get_force_short_blocks(const lame_global_flags *);
554 /* Input PCM is emphased PCM (for instance from one of the rarely
555 emphased CDs), it is STRONGLY not recommended to use this, because
556 psycho does not take it into account, and last but not least many decoders
558 int CDECL lame_set_emphasis(lame_global_flags *, int);
559 int CDECL lame_get_emphasis(const lame_global_flags *);
563 /************************************************************************/
564 /* internal variables, cannot be set... */
565 /* provided because they may be of use to calling application */
566 /************************************************************************/
567 /* version 0=MPEG-2 1=MPEG-1 (2=MPEG-2.5) */
568 int CDECL lame_get_version(const lame_global_flags *);
571 int CDECL lame_get_encoder_delay(const lame_global_flags *);
574 padding appended to the input to make sure decoder can fully decode
575 all input. Note that this value can only be calculated during the
576 call to lame_encoder_flush(). Before lame_encoder_flush() has
577 been called, the value of encoder_padding = 0.
579 int CDECL lame_get_encoder_padding(const lame_global_flags *);
581 /* size of MPEG frame */
582 int CDECL lame_get_framesize(const lame_global_flags *);
584 /* number of PCM samples buffered, but not yet encoded to mp3 data. */
585 int CDECL lame_get_mf_samples_to_encode( const lame_global_flags* gfp );
588 size (bytes) of mp3 data buffered, but not yet encoded.
589 this is the number of bytes which would be output by a call to
590 lame_encode_flush_nogap. NOTE: lame_encode_flush() will return
591 more bytes than this because it will encode the reamining buffered
592 PCM samples before flushing the mp3 buffers.
594 int CDECL lame_get_size_mp3buffer( const lame_global_flags* gfp );
596 /* number of frames encoded so far */
597 int CDECL lame_get_frameNum(const lame_global_flags *);
600 lame's estimate of the total number of frames to be encoded
601 only valid if calling program set num_samples
603 int CDECL lame_get_totalframes(const lame_global_flags *);
605 /* RadioGain value. Multiplied by 10 and rounded to the nearest. */
606 int CDECL lame_get_RadioGain(const lame_global_flags *);
608 /* AudiophileGain value. Multipled by 10 and rounded to the nearest. */
609 int CDECL lame_get_AudiophileGain(const lame_global_flags *);
611 /* the peak sample */
612 float CDECL lame_get_PeakSample(const lame_global_flags *);
614 /* Gain change required for preventing clipping. The value is correct only if
615 peak sample searching was enabled. If negative then the waveform
616 already does not clip. The value is multiplied by 10 and rounded up. */
617 int CDECL lame_get_noclipGainChange(const lame_global_flags *);
619 /* user-specified scale factor required for preventing clipping. Value is
620 correct only if peak sample searching was enabled and no user-specified
621 scaling was performed. If negative then either the waveform already does
622 not clip or the value cannot be determined */
623 float CDECL lame_get_noclipScale(const lame_global_flags *);
633 * sets more internal configuration based on data provided above.
634 * returns -1 if something failed.
636 int CDECL lame_init_params(lame_global_flags *);
641 * get the version number, in a string. of the form:
642 * "3.63 (beta)" or just "3.63".
644 const char* CDECL get_lame_version ( void );
645 const char* CDECL get_lame_short_version ( void );
646 const char* CDECL get_lame_very_short_version ( void );
647 const char* CDECL get_psy_version ( void );
648 const char* CDECL get_lame_url ( void );
649 const char* CDECL get_lame_os_bitness ( void );
653 * get the version numbers in numerical form.
656 /* generic LAME version */
659 int alpha; /* 0 if not an alpha version */
660 int beta; /* 0 if not a beta version */
662 /* version of the psy model */
665 int psy_alpha; /* 0 if not an alpha version */
666 int psy_beta; /* 0 if not a beta version */
668 /* compile time features */
669 const char *features; /* Don't make assumptions about the contents! */
671 void CDECL get_lame_version_numerical(lame_version_t *);
676 * print internal lame configuration to message handler
678 void CDECL lame_print_config(const lame_global_flags* gfp);
680 void CDECL lame_print_internals( const lame_global_flags *gfp);
684 * input pcm data, output (maybe) mp3 frames.
685 * This routine handles all buffering, resampling and filtering for you.
687 * return code number of bytes output in mp3buf. Can be 0
688 * -1: mp3buf was too small
689 * -2: malloc() problem
690 * -3: lame_init_params() not called
691 * -4: psycho acoustic problems
693 * The required mp3buf_size can be computed from num_samples,
694 * samplerate and encoding rate, but here is a worst case estimate:
696 * mp3buf_size in bytes = 1.25*num_samples + 7200
698 * I think a tighter bound could be: (mt, March 2000)
700 * num_samples*(bitrate/8)/samplerate + 4*1152*(bitrate/8)/samplerate + 512
702 * num_samples*(bitrate/8)/samplerate + 4*576*(bitrate/8)/samplerate + 256
704 * but test first if you use that!
706 * set mp3buf_size = 0 and LAME will not check if mp3buf_size is
710 * if gfp->num_channels=2, but gfp->mode = 3 (mono), the L & R channels
711 * will be averaged into the L channel before encoding only the L channel
712 * This will overwrite the data in buffer_l[] and buffer_r[].
715 int CDECL lame_encode_buffer (
716 lame_global_flags* gfp, /* global context handle */
717 const short int buffer_l [], /* PCM data for left channel */
718 const short int buffer_r [], /* PCM data for right channel */
719 const int nsamples, /* number of samples per channel */
720 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
721 const int mp3buf_size ); /* number of valid octets in this
725 * as above, but input has L & R channel data interleaved.
727 * num_samples = number of samples in the L (or R)
728 * channel, not the total number of samples in pcm[]
730 int CDECL lame_encode_buffer_interleaved(
731 lame_global_flags* gfp, /* global context handlei */
732 short int pcm[], /* PCM data for left and right
733 channel, interleaved */
734 int num_samples, /* number of samples per channel,
735 _not_ number of samples in
737 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
738 int mp3buf_size ); /* number of valid octets in this
742 /* as lame_encode_buffer, but for 'float's.
743 * !! NOTE: !! data must still be scaled to be in the same range as
744 * short int, +/- 32768
746 int CDECL lame_encode_buffer_float(
747 lame_global_flags* gfp, /* global context handle */
748 const float pcm_l [], /* PCM data for left channel */
749 const float pcm_r [], /* PCM data for right channel */
750 const int nsamples, /* number of samples per channel */
751 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
752 const int mp3buf_size ); /* number of valid octets in this
755 /* as lame_encode_buffer, but for 'float's.
756 * !! NOTE: !! data must be scaled to +/- 1 full scale
758 int CDECL lame_encode_buffer_ieee_float(
760 const float pcm_l [], /* PCM data for left channel */
761 const float pcm_r [], /* PCM data for right channel */
763 unsigned char * mp3buf,
764 const int mp3buf_size);
765 int CDECL lame_encode_buffer_interleaved_ieee_float(
767 const float pcm[], /* PCM data for left and right
768 channel, interleaved */
770 unsigned char * mp3buf,
771 const int mp3buf_size);
773 /* as lame_encode_buffer, but for 'double's.
774 * !! NOTE: !! data must be scaled to +/- 1 full scale
776 int CDECL lame_encode_buffer_ieee_double(
778 const double pcm_l [], /* PCM data for left channel */
779 const double pcm_r [], /* PCM data for right channel */
781 unsigned char * mp3buf,
782 const int mp3buf_size);
783 int CDECL lame_encode_buffer_interleaved_ieee_double(
785 const double pcm[], /* PCM data for left and right
786 channel, interleaved */
788 unsigned char * mp3buf,
789 const int mp3buf_size);
791 /* as lame_encode_buffer, but for long's
792 * !! NOTE: !! data must still be scaled to be in the same range as
793 * short int, +/- 32768
795 * This scaling was a mistake (doesn't allow one to exploit full
796 * precision of type 'long'. Use lame_encode_buffer_long2() instead.
799 int CDECL lame_encode_buffer_long(
800 lame_global_flags* gfp, /* global context handle */
801 const long buffer_l [], /* PCM data for left channel */
802 const long buffer_r [], /* PCM data for right channel */
803 const int nsamples, /* number of samples per channel */
804 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
805 const int mp3buf_size ); /* number of valid octets in this
808 /* Same as lame_encode_buffer_long(), but with correct scaling.
809 * !! NOTE: !! data must still be scaled to be in the same range as
810 * type 'long'. Data should be in the range: +/- 2^(8*size(long)-1)
813 int CDECL lame_encode_buffer_long2(
814 lame_global_flags* gfp, /* global context handle */
815 const long buffer_l [], /* PCM data for left channel */
816 const long buffer_r [], /* PCM data for right channel */
817 const int nsamples, /* number of samples per channel */
818 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
819 const int mp3buf_size ); /* number of valid octets in this
822 /* as lame_encode_buffer, but for int's
823 * !! NOTE: !! input should be scaled to the maximum range of 'int'
824 * If int is 4 bytes, then the values should range from
827 * This routine does not (and cannot, without loosing precision) use
828 * the same scaling as the rest of the lame_encode_buffer() routines.
831 int CDECL lame_encode_buffer_int(
832 lame_global_flags* gfp, /* global context handle */
833 const int buffer_l [], /* PCM data for left channel */
834 const int buffer_r [], /* PCM data for right channel */
835 const int nsamples, /* number of samples per channel */
836 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
837 const int mp3buf_size ); /* number of valid octets in this
846 * lame_encode_flush will flush the intenal PCM buffers, padding with
847 * 0's to make sure the final frame is complete, and then flush
848 * the internal MP3 buffers, and thus may return a
849 * final few mp3 frames. 'mp3buf' should be at least 7200 bytes long
850 * to hold all possible emitted data.
852 * will also write id3v1 tags (if any) into the bitstream
854 * return code = number of bytes output to mp3buf. Can be 0
856 int CDECL lame_encode_flush(
857 lame_global_flags * gfp, /* global context handle */
858 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
859 int size); /* number of valid octets in this stream */
863 * lame_encode_flush_nogap will flush the internal mp3 buffers and pad
864 * the last frame with ancillary data so it is a complete mp3 frame.
866 * 'mp3buf' should be at least 7200 bytes long
867 * to hold all possible emitted data.
869 * After a call to this routine, the outputed mp3 data is complete, but
870 * you may continue to encode new PCM samples and write future mp3 data
871 * to a different file. The two mp3 files will play back with no gaps
872 * if they are concatenated together.
874 * This routine will NOT write id3v1 tags into the bitstream.
876 * return code = number of bytes output to mp3buf. Can be 0
878 int CDECL lame_encode_flush_nogap(
879 lame_global_flags * gfp, /* global context handle */
880 unsigned char* mp3buf, /* pointer to encoded MP3 stream */
881 int size); /* number of valid octets in this stream */
885 * Normally, this is called by lame_init_params(). It writes id3v2 and
886 * Xing headers into the front of the bitstream, and sets frame counters
887 * and bitrate histogram data to 0. You can also call this after
888 * lame_encode_flush_nogap().
890 int CDECL lame_init_bitstream(
891 lame_global_flags * gfp); /* global context handle */
896 * OPTIONAL: some simple statistics
897 * a bitrate histogram to visualize the distribution of used frame sizes
898 * a stereo mode histogram to visualize the distribution of used stereo
899 * modes, useful in joint-stereo mode only
900 * 0: LR left-right encoded
901 * 1: LR-I left-right and intensity encoded (currently not supported)
902 * 2: MS mid-side encoded
903 * 3: MS-I mid-side and intensity encoded (currently not supported)
905 * attention: don't call them after lame_encode_finish
906 * suggested: lame_encode_flush -> lame_*_hist -> lame_close
909 void CDECL lame_bitrate_hist(
910 const lame_global_flags * gfp,
911 int bitrate_count[14] );
912 void CDECL lame_bitrate_kbps(
913 const lame_global_flags * gfp,
914 int bitrate_kbps [14] );
915 void CDECL lame_stereo_mode_hist(
916 const lame_global_flags * gfp,
917 int stereo_mode_count[4] );
919 void CDECL lame_bitrate_stereo_mode_hist (
920 const lame_global_flags * gfp,
921 int bitrate_stmode_count[14][4] );
923 void CDECL lame_block_type_hist (
924 const lame_global_flags * gfp,
925 int btype_count[6] );
927 void CDECL lame_bitrate_block_type_hist (
928 const lame_global_flags * gfp,
929 int bitrate_btype_count[14][6] );
931 #if (DEPRECATED_OR_OBSOLETE_CODE_REMOVED && 0)
935 * lame_mp3_tags_fid will rewrite a Xing VBR tag to the mp3 file with file
936 * pointer fid. These calls perform forward and backwards seeks, so make
937 * sure fid is a real file. Make sure lame_encode_flush has been called,
938 * and all mp3 data has been written to the file before calling this
941 * if VBR tags are turned off by the user, or turned off by LAME because
942 * the output is not a regular file, this call does nothing
944 * LAME wants to read from the file to skip an optional ID3v2 tag, so
945 * make sure you opened the file for writing and reading.
947 * You can call lame_get_lametag_frame instead, if you want to insert
948 * the lametag yourself.
950 void CDECL lame_mp3_tags_fid(lame_global_flags *, FILE* fid);
955 * lame_get_lametag_frame copies the final LAME-tag into 'buffer'.
956 * The function returns the number of bytes copied into buffer, or
957 * the required buffer size, if the provided buffer is too small.
958 * Function failed, if the return value is larger than 'size'!
959 * Make sure lame_encode flush has been called before calling this function.
961 * if VBR tags are turned off by the user, or turned off by LAME,
962 * this call does nothing and returns 0.
964 * LAME inserted an empty frame in the beginning of mp3 audio data,
965 * which you have to replace by the final LAME-tag frame after encoding.
966 * In case there is no ID3v2 tag, usually this frame will be the very first
967 * data in your mp3 file. If you put some other leading data into your
968 * file, you'll have to do some bookkeeping about where to write this buffer.
970 size_t CDECL lame_get_lametag_frame(
971 const lame_global_flags *, unsigned char* buffer, size_t size);
975 * final call to free all remaining buffers
977 int CDECL lame_close (lame_global_flags *);
979 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
983 * lame_encode_finish combines lame_encode_flush() and lame_close() in
984 * one call. However, once this call is made, the statistics routines
985 * will no longer work because the data will have been cleared, and
986 * lame_mp3_tags_fid() cannot be called to add data to the VBR header
988 int CDECL lame_encode_finish(
989 lame_global_flags* gfp,
990 unsigned char* mp3buf,
999 /*********************************************************************
1003 * a simple interface to mpglib, part of mpg123, is also included if
1004 * libmp3lame is compiled with HAVE_MPGLIB
1006 *********************************************************************/
1008 struct hip_global_struct;
1009 typedef struct hip_global_struct hip_global_flags;
1010 typedef hip_global_flags *hip_t;
1014 int header_parsed; /* 1 if header was parsed and following data was
1016 int stereo; /* number of channels */
1017 int samplerate; /* sample rate */
1018 int bitrate; /* bitrate */
1019 int mode; /* mp3 frame type */
1020 int mode_ext; /* mp3 frame type */
1021 int framesize; /* number of samples per mp3 frame */
1023 /* this data is only computed if mpglib detects a Xing VBR header */
1024 unsigned long nsamp; /* number of samples in mp3 file. */
1025 int totalframes; /* total number of frames in mp3 file */
1027 /* this data is not currently computed by the mpglib routines */
1028 int framenum; /* frames decoded counter */
1031 /* required call to initialize decoder */
1032 hip_t CDECL hip_decode_init(void);
1034 /* cleanup call to exit decoder */
1035 int CDECL hip_decode_exit(hip_t gfp);
1037 /* HIP reporting functions */
1038 void CDECL hip_set_errorf(hip_t gfp, lame_report_function f);
1039 void CDECL hip_set_debugf(hip_t gfp, lame_report_function f);
1040 void CDECL hip_set_msgf (hip_t gfp, lame_report_function f);
1042 /*********************************************************************
1043 * input 1 mp3 frame, output (maybe) pcm data.
1045 * nout = hip_decode(hip, mp3buf,len,pcm_l,pcm_r);
1048 * len : number of bytes of mp3 data in mp3buf
1049 * mp3buf[len] : mp3 data to be decoded
1052 * nout: -1 : decoding error
1053 * 0 : need more data before we can complete the decode
1054 * >0 : returned 'nout' samples worth of data in pcm_l,pcm_r
1055 * pcm_l[nout] : left channel data
1056 * pcm_r[nout] : right channel data
1058 *********************************************************************/
1059 int CDECL hip_decode( hip_t gfp
1060 , unsigned char * mp3buf
1066 /* same as hip_decode, and also returns mp3 header data */
1067 int CDECL hip_decode_headers( hip_t gfp
1068 , unsigned char* mp3buf
1072 , mp3data_struct* mp3data
1075 /* same as hip_decode, but returns at most one frame */
1076 int CDECL hip_decode1( hip_t gfp
1077 , unsigned char* mp3buf
1083 /* same as hip_decode1, but returns at most one frame and mp3 header data */
1084 int CDECL hip_decode1_headers( hip_t gfp
1085 , unsigned char* mp3buf
1089 , mp3data_struct* mp3data
1092 /* same as hip_decode1_headers, but also returns enc_delay and enc_padding
1093 from VBR Info tag, (-1 if no info tag was found) */
1094 int CDECL hip_decode1_headersB( hip_t gfp
1095 , unsigned char* mp3buf
1099 , mp3data_struct* mp3data
1107 * lame_decode... functions are there to keep old code working
1108 * but it is strongly recommended to replace calls by hip_decode...
1109 * function calls, see above.
1111 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
1113 int CDECL lame_decode_init(void);
1114 int CDECL lame_decode(
1115 unsigned char * mp3buf,
1119 int CDECL lame_decode_headers(
1120 unsigned char* mp3buf,
1124 mp3data_struct* mp3data );
1125 int CDECL lame_decode1(
1126 unsigned char* mp3buf,
1130 int CDECL lame_decode1_headers(
1131 unsigned char* mp3buf,
1135 mp3data_struct* mp3data );
1136 int CDECL lame_decode1_headersB(
1137 unsigned char* mp3buf,
1141 mp3data_struct* mp3data,
1144 int CDECL lame_decode_exit(void);
1146 #endif /* obsolete lame_decode API calls */
1149 /*********************************************************************
1153 *********************************************************************/
1156 * id3tag.h -- Interface to write ID3 version 1 and 2 tags.
1158 * Copyright (C) 2000 Don Melton.
1160 * This library is free software; you can redistribute it and/or
1161 * modify it under the terms of the GNU Library General Public
1162 * License as published by the Free Software Foundation; either
1163 * version 2 of the License, or (at your option) any later version.
1165 * This library is distributed in the hope that it will be useful,
1166 * but WITHOUT ANY WARRANTY; without even the implied warranty of
1167 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1168 * Library General Public License for more details.
1170 * You should have received a copy of the GNU Library General Public
1171 * License along with this library; if not, write to the Free Software
1172 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
1175 /* utility to obtain alphabetically sorted list of genre names with numbers */
1176 void CDECL id3tag_genre_list(
1177 void (*handler)(int, const char *, void *),
1180 void CDECL id3tag_init (lame_t gfp);
1182 /* force addition of version 2 tag */
1183 void CDECL id3tag_add_v2 (lame_t gfp);
1185 /* add only a version 1 tag */
1186 void CDECL id3tag_v1_only (lame_t gfp);
1188 /* add only a version 2 tag */
1189 void CDECL id3tag_v2_only (lame_t gfp);
1191 /* pad version 1 tag with spaces instead of nulls */
1192 void CDECL id3tag_space_v1 (lame_t gfp);
1194 /* pad version 2 tag with extra 128 bytes */
1195 void CDECL id3tag_pad_v2 (lame_t gfp);
1197 /* pad version 2 tag with extra n bytes */
1198 void CDECL id3tag_set_pad (lame_t gfp, size_t n);
1200 void CDECL id3tag_set_title(lame_t gfp, const char* title);
1201 void CDECL id3tag_set_artist(lame_t gfp, const char* artist);
1202 void CDECL id3tag_set_album(lame_t gfp, const char* album);
1203 void CDECL id3tag_set_year(lame_t gfp, const char* year);
1204 void CDECL id3tag_set_comment(lame_t gfp, const char* comment);
1206 /* return -1 result if track number is out of ID3v1 range
1207 and ignored for ID3v1 */
1208 int CDECL id3tag_set_track(lame_t gfp, const char* track);
1210 /* return non-zero result if genre name or number is invalid
1212 result -1: genre number out of range
1213 result -2: no valid ID3v1 genre name, mapped to ID3v1 'Other'
1214 but taken as-is for ID3v2 genre tag */
1215 int CDECL id3tag_set_genre(lame_t gfp, const char* genre);
1217 /* return non-zero result if field name is invalid */
1218 int CDECL id3tag_set_fieldvalue(lame_t gfp, const char* fieldvalue);
1220 /* return non-zero result if image type is invalid */
1221 int CDECL id3tag_set_albumart(lame_t gfp, const char* image, size_t size);
1223 /* lame_get_id3v1_tag copies ID3v1 tag into buffer.
1224 * Function returns number of bytes copied into buffer, or number
1225 * of bytes rquired if buffer 'size' is too small.
1226 * Function fails, if returned value is larger than 'size'.
1228 * This functions does nothing, if user/LAME disabled ID3v1 tag.
1230 size_t CDECL lame_get_id3v1_tag(lame_t gfp, unsigned char* buffer, size_t size);
1232 /* lame_get_id3v2_tag copies ID3v2 tag into buffer.
1233 * Function returns number of bytes copied into buffer, or number
1234 * of bytes rquired if buffer 'size' is too small.
1235 * Function fails, if returned value is larger than 'size'.
1237 * This functions does nothing, if user/LAME disabled ID3v2 tag.
1239 size_t CDECL lame_get_id3v2_tag(lame_t gfp, unsigned char* buffer, size_t size);
1241 /* normaly lame_init_param writes ID3v2 tags into the audio stream
1242 * Call lame_set_write_id3tag_automatic(gfp, 0) before lame_init_param
1243 * to turn off this behaviour and get ID3v2 tag with above function
1244 * write it yourself into your file.
1246 void CDECL lame_set_write_id3tag_automatic(lame_global_flags * gfp, int);
1247 int CDECL lame_get_write_id3tag_automatic(lame_global_flags const* gfp);
1250 int CDECL id3tag_set_textinfo_latin1(lame_global_flags * gfp, char const *id, char const *text);
1253 int CDECL id3tag_set_comment_latin1(lame_global_flags * gfp,
1254 char const *lang, char const *desc, char const *text);
1256 #if DEPRECATED_OR_OBSOLETE_CODE_REMOVED
1259 int CDECL id3tag_set_textinfo_ucs2(lame_global_flags * gfp,
1260 char const *id, unsigned short const *text);
1263 int CDECL id3tag_set_comment_ucs2(lame_global_flags * gfp,
1265 unsigned short const *desc, unsigned short const *text);
1268 int CDECL id3tag_set_fieldvalue_ucs2(lame_t gfp, const unsigned short *fieldvalue);
1272 int CDECL id3tag_set_fieldvalue_utf16(lame_t gfp, const unsigned short *fieldvalue);
1275 int CDECL id3tag_set_textinfo_utf16(lame_global_flags * gfp,
1276 char const *id, unsigned short const *text);
1279 int CDECL id3tag_set_comment_utf16(lame_global_flags * gfp,
1281 unsigned short const *desc, unsigned short const *text);
1284 /***********************************************************************
1286 * list of valid bitrates [kbps] & sample frequencies [Hz].
1287 * first index: 0: MPEG-2 values (sample frequencies 16...24 kHz)
1288 * 1: MPEG-1 values (sample frequencies 32...48 kHz)
1289 * 2: MPEG-2.5 values (sample frequencies 8...12 kHz)
1290 ***********************************************************************/
1292 extern const int bitrate_table [3][16];
1293 extern const int samplerate_table [3][ 4];
1295 /* access functions for use in DLL, global vars are not exported */
1296 int CDECL lame_get_bitrate(int mpeg_version, int table_index);
1297 int CDECL lame_get_samplerate(int mpeg_version, int table_index);
1300 /* maximum size of albumart image (128KB), which affects LAME_MAXMP3BUFFER
1301 as well since lame_encode_buffer() also returns ID3v2 tag data */
1302 #define LAME_MAXALBUMART (128 * 1024)
1304 /* maximum size of mp3buffer needed if you encode at most 1152 samples for
1305 each call to lame_encode_buffer. see lame_encode_buffer() below
1306 (LAME_MAXMP3BUFFER is now obsolete) */
1307 #define LAME_MAXMP3BUFFER (16384 + LAME_MAXALBUMART)
1313 LAME_GENERICERROR = -1,
1315 LAME_BADBITRATE = -11,
1316 LAME_BADSAMPFREQ = -12,
1317 LAME_INTERNALERROR = -13,
1319 FRONTEND_READERROR = -80,
1320 FRONTEND_WRITEERROR = -81,
1321 FRONTEND_FILETOOLARGE = -82
1323 } lame_errorcodes_t;
1325 #if defined(__cplusplus)
1328 #endif /* LAME_LAME_H */