sdk-world v2026.11.05
PS2 SDK - world tier (copyleft-allowed, non-essential packages)
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mad.h
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1/*
2 * libmad - MPEG audio decoder library
3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * If you would like to negotiate alternate licensing terms, you may do
20 * so by contacting: Underbit Technologies, Inc. <info@underbit.com>
21 */
22
27# ifdef __cplusplus
28extern "C" {
29# endif
30
31# define FPM_INTEL
32
33
34
35# define SIZEOF_INT 4
36# define SIZEOF_LONG 4
37# define SIZEOF_LONG_LONG 8
38
39
40/* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */
41
42# ifndef LIBMAD_VERSION_H
43# define LIBMAD_VERSION_H
44
45# define MAD_VERSION_MAJOR 0
46# define MAD_VERSION_MINOR 15
47# define MAD_VERSION_PATCH 1
48# define MAD_VERSION_EXTRA " (beta)"
49
50# define MAD_VERSION_STRINGIZE(str) #str
51# define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
52
53# define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
54 MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
55 MAD_VERSION_STRING(MAD_VERSION_PATCH) \
56 MAD_VERSION_EXTRA
57
58# define MAD_PUBLISHYEAR "2000-2004"
59# define MAD_AUTHOR "Underbit Technologies, Inc."
60# define MAD_EMAIL "info@underbit.com"
61
62extern char const mad_version[];
63extern char const mad_copyright[];
64extern char const mad_author[];
65extern char const mad_build[];
66
67# endif
68
69/* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */
70
71# ifndef LIBMAD_FIXED_H
72# define LIBMAD_FIXED_H
73
74# if SIZEOF_INT >= 4
75typedef signed int mad_fixed_t;
76
77typedef signed int mad_fixed64hi_t;
78typedef unsigned int mad_fixed64lo_t;
79# else
80typedef signed long mad_fixed_t;
81
82typedef signed long mad_fixed64hi_t;
83typedef unsigned long mad_fixed64lo_t;
84# endif
85
86# if defined(_MSC_VER)
87# define mad_fixed64_t signed __int64
88# elif 1 || defined(__GNUC__)
89# define mad_fixed64_t signed long long
90# endif
91
92# if defined(FPM_FLOAT)
93typedef double mad_sample_t;
94# else
95typedef mad_fixed_t mad_sample_t;
96# endif
97
98/*
99 * Fixed-point format: 0xABBBBBBB
100 * A == whole part (sign + 3 bits)
101 * B == fractional part (28 bits)
102 *
103 * Values are signed two's complement, so the effective range is:
104 * 0x80000000 to 0x7fffffff
105 * -8.0 to +7.9999999962747097015380859375
106 *
107 * The smallest representable value is:
108 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
109 *
110 * 28 bits of fractional accuracy represent about
111 * 8.6 digits of decimal accuracy.
112 *
113 * Fixed-point numbers can be added or subtracted as normal
114 * integers, but multiplication requires shifting the 64-bit result
115 * from 56 fractional bits back to 28 (and rounding.)
116 *
117 * Changing the definition of MAD_F_FRACBITS is only partially
118 * supported, and must be done with care.
119 */
120
121# define MAD_F_FRACBITS 28
122
123# if MAD_F_FRACBITS == 28
124# define MAD_F(x) ((mad_fixed_t) (x##L))
125# else
126# if MAD_F_FRACBITS < 28
127# warning "MAD_F_FRACBITS < 28"
128# define MAD_F(x) ((mad_fixed_t) \
129 (((x##L) + \
130 (1L << (28 - MAD_F_FRACBITS - 1))) >> \
131 (28 - MAD_F_FRACBITS)))
132# elif MAD_F_FRACBITS > 28
133# error "MAD_F_FRACBITS > 28 not currently supported"
134# define MAD_F(x) ((mad_fixed_t) \
135 ((x##L) << (MAD_F_FRACBITS - 28)))
136# endif
137# endif
138
139# define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
140# define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)
141
142# define MAD_F_ONE MAD_F(0x10000000)
143
144# define mad_f_tofixed(x) ((mad_fixed_t) \
145 ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
146# define mad_f_todouble(x) ((double) \
147 ((x) / (double) (1L << MAD_F_FRACBITS)))
148
149# define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
150# define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
151 /* (x should be positive) */
152
153# define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)
154
155# define mad_f_add(x, y) ((x) + (y))
156# define mad_f_sub(x, y) ((x) - (y))
157
158# if defined(FPM_FLOAT)
159# error "FPM_FLOAT not yet supported"
160
161# undef MAD_F
162# define MAD_F(x) mad_f_todouble(x)
163
164# define mad_f_mul(x, y) ((x) * (y))
165# define mad_f_scale64
166
167# undef ASO_ZEROCHECK
168
169# elif defined(FPM_64BIT)
170
171/*
172 * This version should be the most accurate if 64-bit types are supported by
173 * the compiler, although it may not be the most efficient.
174 */
175# if defined(OPT_ACCURACY)
176# define mad_f_mul(x, y) \
177 ((mad_fixed_t) \
178 ((((mad_fixed64_t) (x) * (y)) + \
179 (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
180# else
181# define mad_f_mul(x, y) \
182 ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
183# endif
184
185# define MAD_F_SCALEBITS MAD_F_FRACBITS
186
187/* --- Intel --------------------------------------------------------------- */
188
189# elif defined(FPM_INTEL)
190
191# if defined(_MSC_VER)
192# pragma warning(push)
193# pragma warning(disable: 4035) /* no return value */
194static __forceinline
195mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
196{
197 enum {
198 fracbits = MAD_F_FRACBITS
199 };
200
201 __asm {
202 mov eax, x
203 imul y
204 shrd eax, edx, fracbits
205 }
206
207 /* implicit return of eax */
208}
209# pragma warning(pop)
210
211# define mad_f_mul mad_f_mul_inline
212# define mad_f_scale64
213# else
214/*
215 * This Intel version is fast and accurate; the disposition of the least
216 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
217 */
218# define MAD_F_MLX(hi, lo, x, y) \
219 asm ("imull %3" \
220 : "=a" (lo), "=d" (hi) \
221 : "%a" (x), "rm" (y) \
222 : "cc")
223
224# if defined(OPT_ACCURACY)
225/*
226 * This gives best accuracy but is not very fast.
227 */
228# define MAD_F_MLA(hi, lo, x, y) \
229 ({ mad_fixed64hi_t __hi; \
230 mad_fixed64lo_t __lo; \
231 MAD_F_MLX(__hi, __lo, (x), (y)); \
232 asm ("addl %2,%0\n\t" \
233 "adcl %3,%1" \
234 : "=rm" (lo), "=rm" (hi) \
235 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
236 : "cc"); \
237 })
238# endif /* OPT_ACCURACY */
239
240# if defined(OPT_ACCURACY)
241/*
242 * Surprisingly, this is faster than SHRD followed by ADC.
243 */
244# define mad_f_scale64(hi, lo) \
245 ({ mad_fixed64hi_t __hi_; \
246 mad_fixed64lo_t __lo_; \
247 mad_fixed_t __result; \
248 asm ("addl %4,%2\n\t" \
249 "adcl %5,%3" \
250 : "=rm" (__lo_), "=rm" (__hi_) \
251 : "0" (lo), "1" (hi), \
252 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
253 : "cc"); \
254 asm ("shrdl %3,%2,%1" \
255 : "=rm" (__result) \
256 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
257 : "cc"); \
258 __result; \
259 })
260# elif defined(OPT_INTEL)
261/*
262 * Alternate Intel scaling that may or may not perform better.
263 */
264# define mad_f_scale64(hi, lo) \
265 ({ mad_fixed_t __result; \
266 asm ("shrl %3,%1\n\t" \
267 "shll %4,%2\n\t" \
268 "orl %2,%1" \
269 : "=rm" (__result) \
270 : "0" (lo), "r" (hi), \
271 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
272 : "cc"); \
273 __result; \
274 })
275# else
276# define mad_f_scale64(hi, lo) \
277 ({ mad_fixed_t __result; \
278 asm ("shrdl %3,%2,%1" \
279 : "=rm" (__result) \
280 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
281 : "cc"); \
282 __result; \
283 })
284# endif /* OPT_ACCURACY */
285
286# define MAD_F_SCALEBITS MAD_F_FRACBITS
287# endif
288
289/* --- ARM ----------------------------------------------------------------- */
290
291# elif defined(FPM_ARM)
292
293/*
294 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The
295 * least significant bit is properly rounded at no CPU cycle cost!
296 */
297# if 1
298/*
299 * This is faster than the default implementation via MAD_F_MLX() and
300 * mad_f_scale64().
301 */
302# define mad_f_mul(x, y) \
303 ({ mad_fixed64hi_t __hi; \
304 mad_fixed64lo_t __lo; \
305 mad_fixed_t __result; \
306 asm ("smull %0, %1, %3, %4\n\t" \
307 "movs %0, %0, lsr %5\n\t" \
308 "adc %2, %0, %1, lsl %6" \
309 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
310 : "%r" (x), "r" (y), \
311 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
312 : "cc"); \
313 __result; \
314 })
315# endif
316
317# define MAD_F_MLX(hi, lo, x, y) \
318 asm ("smull %0, %1, %2, %3" \
319 : "=&r" (lo), "=&r" (hi) \
320 : "%r" (x), "r" (y))
321
322# define MAD_F_MLA(hi, lo, x, y) \
323 asm ("smlal %0, %1, %2, %3" \
324 : "+r" (lo), "+r" (hi) \
325 : "%r" (x), "r" (y))
326
327# define MAD_F_MLN(hi, lo) \
328 asm ("rsbs %0, %2, #0\n\t" \
329 "rsc %1, %3, #0" \
330 : "=r" (lo), "=r" (hi) \
331 : "0" (lo), "1" (hi) \
332 : "cc")
333
334# define mad_f_scale64(hi, lo) \
335 ({ mad_fixed_t __result; \
336 asm ("movs %0, %1, lsr %3\n\t" \
337 "adc %0, %0, %2, lsl %4" \
338 : "=&r" (__result) \
339 : "r" (lo), "r" (hi), \
340 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
341 : "cc"); \
342 __result; \
343 })
344
345# define MAD_F_SCALEBITS MAD_F_FRACBITS
346
347/* --- MIPS ---------------------------------------------------------------- */
348
349# elif defined(FPM_MIPS)
350
351/*
352 * This MIPS version is fast and accurate; the disposition of the least
353 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
354 */
355# define MAD_F_MLX(hi, lo, x, y) \
356 asm ("mult %2,%3" \
357 : "=l" (lo), "=h" (hi) \
358 : "%r" (x), "r" (y))
359
360# if defined(HAVE_MADD_ASM)
361# define MAD_F_MLA(hi, lo, x, y) \
362 asm ("madd %2,%3" \
363 : "+l" (lo), "+h" (hi) \
364 : "%r" (x), "r" (y))
365# elif defined(HAVE_MADD16_ASM)
366/*
367 * This loses significant accuracy due to the 16-bit integer limit in the
368 * multiply/accumulate instruction.
369 */
370# define MAD_F_ML0(hi, lo, x, y) \
371 asm ("mult %2,%3" \
372 : "=l" (lo), "=h" (hi) \
373 : "%r" ((x) >> 12), "r" ((y) >> 16))
374# define MAD_F_MLA(hi, lo, x, y) \
375 asm ("madd16 %2,%3" \
376 : "+l" (lo), "+h" (hi) \
377 : "%r" ((x) >> 12), "r" ((y) >> 16))
378# define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
379# endif
380
381# if defined(OPT_SPEED)
382# define mad_f_scale64(hi, lo) \
383 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
384# define MAD_F_SCALEBITS MAD_F_FRACBITS
385# endif
386
387/* --- SPARC --------------------------------------------------------------- */
388
389# elif defined(FPM_SPARC)
390
391/*
392 * This SPARC V8 version is fast and accurate; the disposition of the least
393 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
394 */
395# define MAD_F_MLX(hi, lo, x, y) \
396 asm ("smul %2, %3, %0\n\t" \
397 "rd %%y, %1" \
398 : "=r" (lo), "=r" (hi) \
399 : "%r" (x), "rI" (y))
400
401/* --- PowerPC ------------------------------------------------------------- */
402
403# elif defined(FPM_PPC)
404
405/*
406 * This PowerPC version is fast and accurate; the disposition of the least
407 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
408 */
409# define MAD_F_MLX(hi, lo, x, y) \
410 do { \
411 asm ("mullw %0,%1,%2" \
412 : "=r" (lo) \
413 : "%r" (x), "r" (y)); \
414 asm ("mulhw %0,%1,%2" \
415 : "=r" (hi) \
416 : "%r" (x), "r" (y)); \
417 } \
418 while (0)
419
420# if defined(OPT_ACCURACY)
421/*
422 * This gives best accuracy but is not very fast.
423 */
424# define MAD_F_MLA(hi, lo, x, y) \
425 ({ mad_fixed64hi_t __hi; \
426 mad_fixed64lo_t __lo; \
427 MAD_F_MLX(__hi, __lo, (x), (y)); \
428 asm ("addc %0,%2,%3\n\t" \
429 "adde %1,%4,%5" \
430 : "=r" (lo), "=r" (hi) \
431 : "%r" (lo), "r" (__lo), \
432 "%r" (hi), "r" (__hi) \
433 : "xer"); \
434 })
435# endif
436
437# if defined(OPT_ACCURACY)
438/*
439 * This is slower than the truncating version below it.
440 */
441# define mad_f_scale64(hi, lo) \
442 ({ mad_fixed_t __result, __round; \
443 asm ("rotrwi %0,%1,%2" \
444 : "=r" (__result) \
445 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
446 asm ("extrwi %0,%1,1,0" \
447 : "=r" (__round) \
448 : "r" (__result)); \
449 asm ("insrwi %0,%1,%2,0" \
450 : "+r" (__result) \
451 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
452 asm ("add %0,%1,%2" \
453 : "=r" (__result) \
454 : "%r" (__result), "r" (__round)); \
455 __result; \
456 })
457# else
458# define mad_f_scale64(hi, lo) \
459 ({ mad_fixed_t __result; \
460 asm ("rotrwi %0,%1,%2" \
461 : "=r" (__result) \
462 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
463 asm ("insrwi %0,%1,%2,0" \
464 : "+r" (__result) \
465 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
466 __result; \
467 })
468# endif
469
470# define MAD_F_SCALEBITS MAD_F_FRACBITS
471
472/* --- Default ------------------------------------------------------------- */
473
474# elif defined(FPM_DEFAULT)
475
476/*
477 * This version is the most portable but it loses significant accuracy.
478 * Furthermore, accuracy is biased against the second argument, so care
479 * should be taken when ordering operands.
480 *
481 * The scale factors are constant as this is not used with SSO.
482 *
483 * Pre-rounding is required to stay within the limits of compliance.
484 */
485# if defined(OPT_SPEED)
486# define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
487# else
488# define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
489 (((y) + (1L << 15)) >> 16))
490# endif
491
492/* ------------------------------------------------------------------------- */
493
494# else
495# error "no FPM selected"
496# endif
497
498/* default implementations */
499
500# if !defined(mad_f_mul)
501# define mad_f_mul(x, y) \
502 ({ register mad_fixed64hi_t __hi; \
503 register mad_fixed64lo_t __lo; \
504 MAD_F_MLX(__hi, __lo, (x), (y)); \
505 mad_f_scale64(__hi, __lo); \
506 })
507# endif
508
509# if !defined(MAD_F_MLA)
510# define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
511# define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
512# define MAD_F_MLN(hi, lo) ((lo) = -(lo))
513# define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
514# endif
515
516# if !defined(MAD_F_ML0)
517# define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
518# endif
519
520# if !defined(MAD_F_MLN)
521# define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
522# endif
523
524# if !defined(MAD_F_MLZ)
525# define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
526# endif
527
528# if !defined(mad_f_scale64)
529# if defined(OPT_ACCURACY)
530# define mad_f_scale64(hi, lo) \
531 ((((mad_fixed_t) \
532 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
533 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
534# else
535# define mad_f_scale64(hi, lo) \
536 ((mad_fixed_t) \
537 (((hi) << (32 - MAD_F_SCALEBITS)) | \
538 ((lo) >> MAD_F_SCALEBITS)))
539# endif
540# define MAD_F_SCALEBITS MAD_F_FRACBITS
541# endif
542
543/* C routines */
544
545mad_fixed_t mad_f_abs(mad_fixed_t);
546mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);
547
548# endif
549
550/* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */
551
552# ifndef LIBMAD_BIT_H
553# define LIBMAD_BIT_H
554
555struct mad_bitptr {
556 unsigned char const *byte;
557 unsigned short cache;
558 unsigned short left;
559};
560
561void mad_bit_init(struct mad_bitptr *, unsigned char const *);
562
563# define mad_bit_finish(bitptr) /* nothing */
564
565unsigned int mad_bit_length(struct mad_bitptr const *,
566 struct mad_bitptr const *);
567
568# define mad_bit_bitsleft(bitptr) ((bitptr)->left)
569unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
570
571void mad_bit_skip(struct mad_bitptr *, unsigned int);
572unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
573void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
574
575unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
576
577# endif
578
579/* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */
580
581# ifndef LIBMAD_TIMER_H
582# define LIBMAD_TIMER_H
583
584typedef struct {
585 signed long seconds; /* whole seconds */
586 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
587} mad_timer_t;
588
589extern mad_timer_t const mad_timer_zero;
590
591# define MAD_TIMER_RESOLUTION 352800000UL
592
593enum mad_units {
594 MAD_UNITS_HOURS = -2,
595 MAD_UNITS_MINUTES = -1,
596 MAD_UNITS_SECONDS = 0,
597
598 /* metric units */
599
600 MAD_UNITS_DECISECONDS = 10,
601 MAD_UNITS_CENTISECONDS = 100,
602 MAD_UNITS_MILLISECONDS = 1000,
603
604 /* audio sample units */
605
606 MAD_UNITS_8000_HZ = 8000,
607 MAD_UNITS_11025_HZ = 11025,
608 MAD_UNITS_12000_HZ = 12000,
609
610 MAD_UNITS_16000_HZ = 16000,
611 MAD_UNITS_22050_HZ = 22050,
612 MAD_UNITS_24000_HZ = 24000,
613
614 MAD_UNITS_32000_HZ = 32000,
615 MAD_UNITS_44100_HZ = 44100,
616 MAD_UNITS_48000_HZ = 48000,
617
618 /* video frame/field units */
619
620 MAD_UNITS_24_FPS = 24,
621 MAD_UNITS_25_FPS = 25,
622 MAD_UNITS_30_FPS = 30,
623 MAD_UNITS_48_FPS = 48,
624 MAD_UNITS_50_FPS = 50,
625 MAD_UNITS_60_FPS = 60,
626
627 /* CD audio frames */
628
629 MAD_UNITS_75_FPS = 75,
630
631 /* video drop-frame units */
632
633 MAD_UNITS_23_976_FPS = -24,
634 MAD_UNITS_24_975_FPS = -25,
635 MAD_UNITS_29_97_FPS = -30,
636 MAD_UNITS_47_952_FPS = -48,
637 MAD_UNITS_49_95_FPS = -50,
638 MAD_UNITS_59_94_FPS = -60
639};
640
641# define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
642
643int mad_timer_compare(mad_timer_t, mad_timer_t);
644
645# define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
646
647void mad_timer_negate(mad_timer_t *);
648mad_timer_t mad_timer_abs(mad_timer_t);
649
650void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
651void mad_timer_add(mad_timer_t *, mad_timer_t);
652void mad_timer_multiply(mad_timer_t *, signed long);
653
654signed long mad_timer_count(mad_timer_t, enum mad_units);
655unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
656void mad_timer_string(mad_timer_t, char *, char const *,
657 enum mad_units, enum mad_units, unsigned long);
658
659# endif
660
661/* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */
662
663# ifndef LIBMAD_STREAM_H
664# define LIBMAD_STREAM_H
665
666
667# define MAD_BUFFER_GUARD 8
668# define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
669
670enum mad_error {
671 MAD_ERROR_NONE = 0x0000, /* no error */
672
673 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
674 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
675
676 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
677
678 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
679 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
680 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
681 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
682 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
683
684 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
685 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
686 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
687 MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
688 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
689 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
690 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
691 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
692 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
693 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
694 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
695 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
696 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
697};
698
699# define MAD_RECOVERABLE(error) ((error) & 0xff00)
700
701struct mad_stream {
702 unsigned char const *buffer; /* input bitstream buffer */
703 unsigned char const *bufend; /* end of buffer */
704 unsigned long skiplen; /* bytes to skip before next frame */
705
706 int sync; /* stream sync found */
707 unsigned long freerate; /* free bitrate (fixed) */
708
709 unsigned char const *this_frame; /* start of current frame */
710 unsigned char const *next_frame; /* start of next frame */
711 struct mad_bitptr ptr; /* current processing bit pointer */
712
713 struct mad_bitptr anc_ptr; /* ancillary bits pointer */
714 unsigned int anc_bitlen; /* number of ancillary bits */
715
716 unsigned char (*main_data)[MAD_BUFFER_MDLEN];
717 /* Layer III main_data() */
718 unsigned int md_len; /* bytes in main_data */
719
720 int options; /* decoding options (see below) */
721 enum mad_error error; /* error code (see above) */
722};
723
724enum {
725 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
726 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
727# if 0 /* not yet implemented */
728 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
729 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
730 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
731# endif
732};
733
734void mad_stream_init(struct mad_stream *);
735void mad_stream_finish(struct mad_stream *);
736
737# define mad_stream_options(stream, opts) \
738 ((void) ((stream)->options = (opts)))
739
740void mad_stream_buffer(struct mad_stream *,
741 unsigned char const *, unsigned long);
742void mad_stream_skip(struct mad_stream *, unsigned long);
743
744int mad_stream_sync(struct mad_stream *);
745
746char const *mad_stream_errorstr(struct mad_stream const *);
747
748# endif
749
750/* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */
751
752# ifndef LIBMAD_FRAME_H
753# define LIBMAD_FRAME_H
754
755
756enum mad_layer {
757 MAD_LAYER_I = 1, /* Layer I */
758 MAD_LAYER_II = 2, /* Layer II */
759 MAD_LAYER_III = 3 /* Layer III */
760};
761
762enum mad_mode {
763 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
764 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
765 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
766 MAD_MODE_STEREO = 3 /* normal LR stereo */
767};
768
769enum mad_emphasis {
770 MAD_EMPHASIS_NONE = 0, /* no emphasis */
771 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
772 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
773 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
774};
775
776struct mad_header {
777 enum mad_layer layer; /* audio layer (1, 2, or 3) */
778 enum mad_mode mode; /* channel mode (see above) */
779 int mode_extension; /* additional mode info */
780 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
781
782 unsigned long bitrate; /* stream bitrate (bps) */
783 unsigned int samplerate; /* sampling frequency (Hz) */
784
785 unsigned short crc_check; /* frame CRC accumulator */
786 unsigned short crc_target; /* final target CRC checksum */
787
788 int flags; /* flags (see below) */
789 int private_bits; /* private bits (see below) */
790
791 mad_timer_t duration; /* audio playing time of frame */
792};
793
794struct mad_frame {
795 struct mad_header header; /* MPEG audio header */
796
797 int options; /* decoding options (from stream) */
798
799 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
800 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
801};
802
803# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
804# define MAD_NSBSAMPLES(header) \
805 ((header)->layer == MAD_LAYER_I ? 12 : \
806 (((header)->layer == MAD_LAYER_III && \
807 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
808
809enum {
810 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
811 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
812
813 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
814 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
815 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
816 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
817
818 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
819 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
820 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
821
822 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
823 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
824 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
825};
826
827enum {
828 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
829 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
830};
831
832void mad_header_init(struct mad_header *);
833
834# define mad_header_finish(header) /* nothing */
835
836int mad_header_decode(struct mad_header *, struct mad_stream *);
837
838void mad_frame_init(struct mad_frame *);
839void mad_frame_finish(struct mad_frame *);
840
841int mad_frame_decode(struct mad_frame *, struct mad_stream *);
842
843void mad_frame_mute(struct mad_frame *);
844
845# endif
846
847/* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */
848
849# ifndef LIBMAD_SYNTH_H
850# define LIBMAD_SYNTH_H
851
852
853struct mad_pcm {
854 unsigned int samplerate; /* sampling frequency (Hz) */
855 unsigned short channels; /* number of channels */
856 unsigned short length; /* number of samples per channel */
857 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
858};
859
860struct mad_synth {
861 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
862 /* [ch][eo][peo][s][v] */
863
864 unsigned int phase; /* current processing phase */
865
866 struct mad_pcm pcm; /* PCM output */
867};
868
869/* single channel PCM selector */
870enum {
871 MAD_PCM_CHANNEL_SINGLE = 0
872};
873
874/* dual channel PCM selector */
875enum {
876 MAD_PCM_CHANNEL_DUAL_1 = 0,
877 MAD_PCM_CHANNEL_DUAL_2 = 1
878};
879
880/* stereo PCM selector */
881enum {
882 MAD_PCM_CHANNEL_STEREO_LEFT = 0,
883 MAD_PCM_CHANNEL_STEREO_RIGHT = 1
884};
885
886void mad_synth_init(struct mad_synth *);
887
888# define mad_synth_finish(synth) /* nothing */
889
890void mad_synth_mute(struct mad_synth *);
891
892void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
893
894# endif
895
896/* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */
897
898# ifndef LIBMAD_DECODER_H
899# define LIBMAD_DECODER_H
900
901
902enum mad_decoder_mode {
903 MAD_DECODER_MODE_SYNC = 0,
904 MAD_DECODER_MODE_ASYNC
905};
906
907enum mad_flow {
908 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
909 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
910 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
911 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
912};
913
914struct mad_decoder {
915 enum mad_decoder_mode mode;
916
917 int options;
918
919 struct {
920 long pid;
921 int in;
922 int out;
923 } async;
924
925 struct {
926 struct mad_stream stream;
927 struct mad_frame frame;
928 struct mad_synth synth;
929 } *sync;
930
931 void *cb_data;
932
933 enum mad_flow (*input_func)(void *, struct mad_stream *);
934 enum mad_flow (*header_func)(void *, struct mad_header const *);
935 enum mad_flow (*filter_func)(void *,
936 struct mad_stream const *, struct mad_frame *);
937 enum mad_flow (*output_func)(void *,
938 struct mad_header const *, struct mad_pcm *);
939 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
940 enum mad_flow (*message_func)(void *, void *, unsigned int *);
941};
942
943void mad_decoder_init(struct mad_decoder *, void *,
944 enum mad_flow (*)(void *, struct mad_stream *),
945 enum mad_flow (*)(void *, struct mad_header const *),
946 enum mad_flow (*)(void *,
947 struct mad_stream const *,
948 struct mad_frame *),
949 enum mad_flow (*)(void *,
950 struct mad_header const *,
951 struct mad_pcm *),
952 enum mad_flow (*)(void *,
953 struct mad_stream *,
954 struct mad_frame *),
955 enum mad_flow (*)(void *, void *, unsigned int *));
956int mad_decoder_finish(struct mad_decoder *);
957
958# define mad_decoder_options(decoder, opts) \
959 ((void) ((decoder)->options = (opts)))
960
961int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
962int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
963
964# endif
965
966# ifdef __cplusplus
967}
968# endif
mad_bitptr
Definition mad.h:555
mad_decoder
Definition mad.h:914
mad_frame
Definition mad.h:794
mad_header
Definition mad.h:776
mad_pcm
Definition mad.h:853
mad_stream
Definition mad.h:701
mad_synth
Definition mad.h:860
mad_timer_t
Definition mad.h:584