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
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26
27 /* configuration for windows */
28 #if defined(_WIN64)
29 # define FPM_64BIT
30 #elif defined(_M_IX86) || defined(__i386__) || defined(__386__)
31 # define FPM_INTEL
32 #else
33 # define FPM_DEFAULT
34 #endif
35
36 /* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */
37
38 # ifndef LIBMAD_VERSION_H
39 # define LIBMAD_VERSION_H
40
41 # define MAD_VERSION_MAJOR 0
42 # define MAD_VERSION_MINOR 15
43 # define MAD_VERSION_PATCH 1
44 # define MAD_VERSION_EXTRA " (beta)"
45
46 # define MAD_VERSION_STRINGIZE(str) #str
47 # define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
48
49 # define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
50 MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
51 MAD_VERSION_STRING(MAD_VERSION_PATCH) \
52 MAD_VERSION_EXTRA
53
54 # define MAD_PUBLISHYEAR "2000-2004"
55 # define MAD_AUTHOR "Underbit Technologies, Inc."
56 # define MAD_EMAIL "info@underbit.com"
57
58 extern char const mad_version[];
59 extern char const mad_copyright[];
60 extern char const mad_author[];
61 extern char const mad_build[];
62
63 # endif
64
65 /* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */
66
67 # ifndef LIBMAD_FIXED_H
68 # define LIBMAD_FIXED_H
69
70 # include <limits.h>
71
72 # if INT_MAX >= 2147483647
73 typedef signed int mad_fixed_t;
74
75 typedef signed int mad_fixed64hi_t;
76 typedef unsigned int mad_fixed64lo_t;
77 # else
78 typedef signed long mad_fixed_t;
79
80 typedef signed long mad_fixed64hi_t;
81 typedef unsigned long mad_fixed64lo_t;
82 # endif
83 /* compile-time assert: */
84 typedef int _mad_check_fixed_t[2*(sizeof(mad_fixed_t)>=4) - 1];
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)
93 typedef double mad_sample_t;
94 # else
95 typedef 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 */
194 static __forceinline
mad_f_mul_inline(mad_fixed_t x,mad_fixed_t y)195 mad_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
214 # elif defined(__WATCOMC__) && defined(__386__)
215 mad_fixed_t mad_f_mul_inl(mad_fixed_t,mad_fixed_t);
216 /* 28 == MAD_F_FRACBITS */
217 #pragma aux mad_f_mul_inl = \
218 "imul ebx", \
219 "shrd eax,edx,28" \
220 parm [eax] [ebx] \
221 value [eax] \
222 modify exact [eax edx]
223
224 # define mad_f_mul mad_f_mul_inl
225 # define mad_f_scale64
226
227 # else
228 /*
229 * This Intel version is fast and accurate; the disposition of the least
230 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
231 */
232 # define MAD_F_MLX(hi, lo, x, y) \
233 asm ("imull %3" \
234 : "=a" (lo), "=d" (hi) \
235 : "%a" (x), "rm" (y) \
236 : "cc")
237
238 # if defined(OPT_ACCURACY)
239 /*
240 * This gives best accuracy but is not very fast.
241 */
242 # define MAD_F_MLA(hi, lo, x, y) \
243 ({ mad_fixed64hi_t __hi; \
244 mad_fixed64lo_t __lo; \
245 MAD_F_MLX(__hi, __lo, (x), (y)); \
246 asm ("addl %2,%0\n\t" \
247 "adcl %3,%1" \
248 : "=rm" (lo), "=rm" (hi) \
249 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
250 : "cc"); \
251 })
252 # endif /* OPT_ACCURACY */
253
254 # if defined(OPT_ACCURACY)
255 /*
256 * Surprisingly, this is faster than SHRD followed by ADC.
257 */
258 # define mad_f_scale64(hi, lo) \
259 ({ mad_fixed64hi_t __hi_; \
260 mad_fixed64lo_t __lo_; \
261 mad_fixed_t __result; \
262 asm ("addl %4,%2\n\t" \
263 "adcl %5,%3" \
264 : "=rm" (__lo_), "=rm" (__hi_) \
265 : "0" (lo), "1" (hi), \
266 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
267 : "cc"); \
268 asm ("shrdl %3,%2,%1" \
269 : "=rm" (__result) \
270 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
271 : "cc"); \
272 __result; \
273 })
274 # elif defined(OPT_INTEL)
275 /*
276 * Alternate Intel scaling that may or may not perform better.
277 */
278 # define mad_f_scale64(hi, lo) \
279 ({ mad_fixed_t __result; \
280 asm ("shrl %3,%1\n\t" \
281 "shll %4,%2\n\t" \
282 "orl %2,%1" \
283 : "=rm" (__result) \
284 : "0" (lo), "r" (hi), \
285 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
286 : "cc"); \
287 __result; \
288 })
289 # else
290 # define mad_f_scale64(hi, lo) \
291 ({ mad_fixed_t __result; \
292 asm ("shrdl %3,%2,%1" \
293 : "=rm" (__result) \
294 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
295 : "cc"); \
296 __result; \
297 })
298 # endif /* OPT_ACCURACY */
299
300 # define MAD_F_SCALEBITS MAD_F_FRACBITS
301 # endif
302
303 /* --- ARM ----------------------------------------------------------------- */
304
305 # elif defined(FPM_ARM)
306
307 /*
308 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The
309 * least significant bit is properly rounded at no CPU cycle cost!
310 */
311 # if 1
312 /*
313 * This is faster than the default implementation via MAD_F_MLX() and
314 * mad_f_scale64().
315 */
316 # define mad_f_mul(x, y) \
317 ({ mad_fixed64hi_t __hi; \
318 mad_fixed64lo_t __lo; \
319 mad_fixed_t __result; \
320 asm ("smull %0, %1, %3, %4\n\t" \
321 "movs %0, %0, lsr %5\n\t" \
322 "adc %2, %0, %1, lsl %6" \
323 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
324 : "%r" (x), "r" (y), \
325 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
326 : "cc"); \
327 __result; \
328 })
329 # endif
330
331 # define MAD_F_MLX(hi, lo, x, y) \
332 asm ("smull %0, %1, %2, %3" \
333 : "=&r" (lo), "=&r" (hi) \
334 : "%r" (x), "r" (y))
335
336 # define MAD_F_MLA(hi, lo, x, y) \
337 asm ("smlal %0, %1, %2, %3" \
338 : "+r" (lo), "+r" (hi) \
339 : "%r" (x), "r" (y))
340
341 #ifdef __thumb__
342 /* In Thumb-2, the RSB-immediate instruction is only allowed with a zero
343 operand. If needed this code can also support Thumb-1
344 (simply append "s" to the end of the second two instructions). */
345 # define MAD_F_MLN(hi, lo) \
346 asm ("rsbs %0, %0, #0\n\t" \
347 "sbc %1, %1, %1\n\t" \
348 "sub %1, %1, %2" \
349 : "+&r" (lo), "=&r" (hi) \
350 : "r" (hi) \
351 : "cc")
352 #else /* ! __thumb__ */
353 # define MAD_F_MLN(hi, lo) \
354 asm ("rsbs %0, %2, #0\n\t" \
355 "rsc %1, %3, #0" \
356 : "=&r" (lo), "=r" (hi) \
357 : "0" (lo), "1" (hi) \
358 : "cc")
359 #endif /* __thumb__ */
360
361 # define mad_f_scale64(hi, lo) \
362 ({ mad_fixed_t __result; \
363 asm ("movs %0, %1, lsr %3\n\t" \
364 "adc %0, %0, %2, lsl %4" \
365 : "=&r" (__result) \
366 : "r" (lo), "r" (hi), \
367 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
368 : "cc"); \
369 __result; \
370 })
371
372 # define MAD_F_SCALEBITS MAD_F_FRACBITS
373
374 /* --- MIPS ---------------------------------------------------------------- */
375
376 # elif defined(FPM_MIPS)
377
378 #if defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
379 typedef unsigned int u64_di_t __attribute__ ((mode (DI)));
380 # define MAD_F_MLX(hi, lo, x, y) \
381 do { \
382 u64_di_t __ll = (u64_di_t) (x) * (y); \
383 hi = __ll >> 32; \
384 lo = __ll; \
385 } while (0)
386 #else
387 /*
388 * This MIPS version is fast and accurate; the disposition of the least
389 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
390 */
391 # define MAD_F_MLX(hi, lo, x, y) \
392 asm ("mult %2,%3" \
393 : "=l" (lo), "=h" (hi) \
394 : "%r" (x), "r" (y))
395
396 # if defined(HAVE_MADD_ASM)
397 # define MAD_F_MLA(hi, lo, x, y) \
398 asm ("madd %2,%3" \
399 : "+l" (lo), "+h" (hi) \
400 : "%r" (x), "r" (y))
401 # elif defined(HAVE_MADD16_ASM)
402 /*
403 * This loses significant accuracy due to the 16-bit integer limit in the
404 * multiply/accumulate instruction.
405 */
406 # define MAD_F_ML0(hi, lo, x, y) \
407 asm ("mult %2,%3" \
408 : "=l" (lo), "=h" (hi) \
409 : "%r" ((x) >> 12), "r" ((y) >> 16))
410 # define MAD_F_MLA(hi, lo, x, y) \
411 asm ("madd16 %2,%3" \
412 : "+l" (lo), "+h" (hi) \
413 : "%r" ((x) >> 12), "r" ((y) >> 16))
414 # define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
415 # endif
416 #endif /* MIPS / gcc-4.4. */
417
418 # if defined(OPT_SPEED)
419 # define mad_f_scale64(hi, lo) \
420 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
421 # define MAD_F_SCALEBITS MAD_F_FRACBITS
422 # endif
423
424 /* --- SPARC --------------------------------------------------------------- */
425
426 # elif defined(FPM_SPARC)
427
428 /*
429 * This SPARC V8 version is fast and accurate; the disposition of the least
430 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
431 */
432 # define MAD_F_MLX(hi, lo, x, y) \
433 asm ("smul %2, %3, %0\n\t" \
434 "rd %%y, %1" \
435 : "=r" (lo), "=r" (hi) \
436 : "%r" (x), "rI" (y))
437
438 /* --- PowerPC ------------------------------------------------------------- */
439
440 # elif defined(FPM_PPC)
441
442 /*
443 * This PowerPC version is fast and accurate; the disposition of the least
444 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
445 */
446 # define MAD_F_MLX(hi, lo, x, y) \
447 do { \
448 asm ("mullw %0,%1,%2" \
449 : "=r" (lo) \
450 : "%r" (x), "r" (y)); \
451 asm ("mulhw %0,%1,%2" \
452 : "=r" (hi) \
453 : "%r" (x), "r" (y)); \
454 } \
455 while (0)
456
457 # if defined(OPT_ACCURACY)
458 /*
459 * This gives best accuracy but is not very fast.
460 */
461 # define MAD_F_MLA(hi, lo, x, y) \
462 ({ mad_fixed64hi_t __hi; \
463 mad_fixed64lo_t __lo; \
464 MAD_F_MLX(__hi, __lo, (x), (y)); \
465 asm ("addc %0,%2,%3\n\t" \
466 "adde %1,%4,%5" \
467 : "=r" (lo), "=r" (hi) \
468 : "0" (lo), "r" (__lo), \
469 "1" (hi), "r" (__hi) \
470 : "xer"); \
471 })
472 # endif
473
474 # if defined(OPT_ACCURACY)
475 /*
476 * This is slower than the truncating version below it.
477 */
478 # define mad_f_scale64(hi, lo) \
479 ({ mad_fixed_t __result, __round; \
480 asm ("rotrwi %0,%1,%2" \
481 : "=r" (__result) \
482 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
483 asm ("extrwi %0,%1,1,0" \
484 : "=r" (__round) \
485 : "r" (__result)); \
486 asm ("insrwi %0,%1,%2,0" \
487 : "+r" (__result) \
488 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
489 asm ("add %0,%1,%2" \
490 : "=r" (__result) \
491 : "%r" (__result), "r" (__round)); \
492 __result; \
493 })
494 # else
495 # define mad_f_scale64(hi, lo) \
496 ({ mad_fixed_t __result; \
497 asm ("rotrwi %0,%1,%2" \
498 : "=r" (__result) \
499 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
500 asm ("insrwi %0,%1,%2,0" \
501 : "+r" (__result) \
502 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
503 __result; \
504 })
505 # endif
506
507 # define MAD_F_SCALEBITS MAD_F_FRACBITS
508
509 /* --- Default ------------------------------------------------------------- */
510
511 # elif defined(FPM_DEFAULT)
512
513 /*
514 * This version is the most portable but it loses significant accuracy.
515 * Furthermore, accuracy is biased against the second argument, so care
516 * should be taken when ordering operands.
517 *
518 * The scale factors are constant as this is not used with SSO.
519 *
520 * Pre-rounding is required to stay within the limits of compliance.
521 */
522 # if defined(OPT_SPEED)
523 # define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
524 # else
525 # define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
526 (((y) + (1L << 15)) >> 16))
527 # endif
528
529 /* ------------------------------------------------------------------------- */
530
531 # else
532 # error "no FPM selected"
533 # endif
534
535 /* default implementations */
536
537 # if !defined(mad_f_mul)
538 # define mad_f_mul(x, y) \
539 ({ register mad_fixed64hi_t __hi; \
540 register mad_fixed64lo_t __lo; \
541 MAD_F_MLX(__hi, __lo, (x), (y)); \
542 mad_f_scale64(__hi, __lo); \
543 })
544 # endif
545
546 # if !defined(MAD_F_MLA)
547 # define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
548 # define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
549 # define MAD_F_MLN(hi, lo) ((lo) = -(lo))
550 # define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
551 # endif
552
553 # if !defined(MAD_F_ML0)
554 # define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
555 # endif
556
557 # if !defined(MAD_F_MLN)
558 # define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
559 # endif
560
561 # if !defined(MAD_F_MLZ)
562 # define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
563 # endif
564
565 # if !defined(mad_f_scale64)
566 # if defined(OPT_ACCURACY)
567 # define mad_f_scale64(hi, lo) \
568 ((((mad_fixed_t) \
569 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
570 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
571 # else
572 # define mad_f_scale64(hi, lo) \
573 ((mad_fixed_t) \
574 (((hi) << (32 - MAD_F_SCALEBITS)) | \
575 ((lo) >> MAD_F_SCALEBITS)))
576 # endif
577 # define MAD_F_SCALEBITS MAD_F_FRACBITS
578 # endif
579
580 /* C routines */
581
582 mad_fixed_t mad_f_abs(mad_fixed_t);
583 mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);
584
585 # endif
586
587 /* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */
588
589 # ifndef LIBMAD_BIT_H
590 # define LIBMAD_BIT_H
591
592 struct mad_bitptr {
593 unsigned char const *byte;
594 unsigned short cache;
595 unsigned short left;
596 };
597
598 void mad_bit_init(struct mad_bitptr *, unsigned char const *);
599
600 # define mad_bit_finish(bitptr) /* nothing */
601
602 unsigned int mad_bit_length(struct mad_bitptr const *,
603 struct mad_bitptr const *);
604
605 # define mad_bit_bitsleft(bitptr) ((bitptr)->left)
606 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
607
608 void mad_bit_skip(struct mad_bitptr *, unsigned int);
609 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
610 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
611
612 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
613
614 # endif
615
616 /* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */
617
618 # ifndef LIBMAD_TIMER_H
619 # define LIBMAD_TIMER_H
620
621 typedef struct {
622 signed long seconds; /* whole seconds */
623 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
624 } mad_timer_t;
625
626 extern mad_timer_t const mad_timer_zero;
627
628 # define MAD_TIMER_RESOLUTION 352800000UL
629
630 enum mad_units {
631 MAD_UNITS_HOURS = -2,
632 MAD_UNITS_MINUTES = -1,
633 MAD_UNITS_SECONDS = 0,
634
635 /* metric units */
636
637 MAD_UNITS_DECISECONDS = 10,
638 MAD_UNITS_CENTISECONDS = 100,
639 MAD_UNITS_MILLISECONDS = 1000,
640
641 /* audio sample units */
642
643 MAD_UNITS_8000_HZ = 8000,
644 MAD_UNITS_11025_HZ = 11025,
645 MAD_UNITS_12000_HZ = 12000,
646
647 MAD_UNITS_16000_HZ = 16000,
648 MAD_UNITS_22050_HZ = 22050,
649 MAD_UNITS_24000_HZ = 24000,
650
651 MAD_UNITS_32000_HZ = 32000,
652 MAD_UNITS_44100_HZ = 44100,
653 MAD_UNITS_48000_HZ = 48000,
654
655 /* video frame/field units */
656
657 MAD_UNITS_24_FPS = 24,
658 MAD_UNITS_25_FPS = 25,
659 MAD_UNITS_30_FPS = 30,
660 MAD_UNITS_48_FPS = 48,
661 MAD_UNITS_50_FPS = 50,
662 MAD_UNITS_60_FPS = 60,
663
664 /* CD audio frames */
665
666 MAD_UNITS_75_FPS = 75,
667
668 /* video drop-frame units */
669
670 MAD_UNITS_23_976_FPS = -24,
671 MAD_UNITS_24_975_FPS = -25,
672 MAD_UNITS_29_97_FPS = -30,
673 MAD_UNITS_47_952_FPS = -48,
674 MAD_UNITS_49_95_FPS = -50,
675 MAD_UNITS_59_94_FPS = -60
676 };
677
678 # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
679
680 int mad_timer_compare(mad_timer_t, mad_timer_t);
681
682 # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
683
684 void mad_timer_negate(mad_timer_t *);
685 mad_timer_t mad_timer_abs(mad_timer_t);
686
687 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
688 void mad_timer_add(mad_timer_t *, mad_timer_t);
689 void mad_timer_multiply(mad_timer_t *, signed long);
690
691 signed long mad_timer_count(mad_timer_t, enum mad_units);
692 unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
693 void mad_timer_string(mad_timer_t, char *, char const *,
694 enum mad_units, enum mad_units, unsigned long);
695
696 # endif
697
698 /* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */
699
700 # ifndef LIBMAD_STREAM_H
701 # define LIBMAD_STREAM_H
702
703
704 # define MAD_BUFFER_GUARD 8
705 # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
706
707 enum mad_error {
708 MAD_ERROR_NONE = 0x0000, /* no error */
709
710 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
711 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
712
713 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
714
715 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
716 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
717 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
718 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
719 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
720
721 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
722 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
723 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
724 MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
725 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
726 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
727 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
728 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
729 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
730 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
731 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
732 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
733 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
734 };
735
736 # define MAD_RECOVERABLE(error) ((error) & 0xff00)
737
738 struct mad_stream {
739 unsigned char const *buffer; /* input bitstream buffer */
740 unsigned char const *bufend; /* end of buffer */
741 unsigned long skiplen; /* bytes to skip before next frame */
742
743 int sync; /* stream sync found */
744 unsigned long freerate; /* free bitrate (fixed) */
745
746 unsigned char const *this_frame; /* start of current frame */
747 unsigned char const *next_frame; /* start of next frame */
748 struct mad_bitptr ptr; /* current processing bit pointer */
749
750 struct mad_bitptr anc_ptr; /* ancillary bits pointer */
751 unsigned int anc_bitlen; /* number of ancillary bits */
752
753 unsigned char (*main_data)[MAD_BUFFER_MDLEN];
754 /* Layer III main_data() */
755 unsigned int md_len; /* bytes in main_data */
756
757 int options; /* decoding options (see below) */
758 enum mad_error error; /* error code (see above) */
759 };
760
761 enum {
762 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
763 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
764 # if 0 /* not yet implemented */
765 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
766 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
767 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
768 # endif
769 };
770
771 void mad_stream_init(struct mad_stream *);
772 void mad_stream_finish(struct mad_stream *);
773
774 # define mad_stream_options(stream, opts) \
775 ((void) ((stream)->options = (opts)))
776
777 void mad_stream_buffer(struct mad_stream *,
778 unsigned char const *, unsigned long);
779 void mad_stream_skip(struct mad_stream *, unsigned long);
780
781 int mad_stream_sync(struct mad_stream *);
782
783 char const *mad_stream_errorstr(struct mad_stream const *);
784
785 # endif
786
787 /* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */
788
789 # ifndef LIBMAD_FRAME_H
790 # define LIBMAD_FRAME_H
791
792
793 enum mad_layer {
794 MAD_LAYER_I = 1, /* Layer I */
795 MAD_LAYER_II = 2, /* Layer II */
796 MAD_LAYER_III = 3 /* Layer III */
797 };
798
799 enum mad_mode {
800 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
801 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
802 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
803 MAD_MODE_STEREO = 3 /* normal LR stereo */
804 };
805
806 enum mad_emphasis {
807 MAD_EMPHASIS_NONE = 0, /* no emphasis */
808 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
809 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
810 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
811 };
812
813 struct mad_header {
814 enum mad_layer layer; /* audio layer (1, 2, or 3) */
815 enum mad_mode mode; /* channel mode (see above) */
816 int mode_extension; /* additional mode info */
817 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
818
819 unsigned long bitrate; /* stream bitrate (bps) */
820 unsigned int samplerate; /* sampling frequency (Hz) */
821
822 unsigned short crc_check; /* frame CRC accumulator */
823 unsigned short crc_target; /* final target CRC checksum */
824
825 int flags; /* flags (see below) */
826 int private_bits; /* private bits (see below) */
827
828 mad_timer_t duration; /* audio playing time of frame */
829 };
830
831 struct mad_frame {
832 struct mad_header header; /* MPEG audio header */
833
834 int options; /* decoding options (from stream) */
835
836 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
837 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
838 };
839
840 # define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
841 # define MAD_NSBSAMPLES(header) \
842 ((header)->layer == MAD_LAYER_I ? 12 : \
843 (((header)->layer == MAD_LAYER_III && \
844 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
845
846 enum {
847 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
848 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
849
850 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
851 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
852 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
853 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
854
855 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
856 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
857 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
858
859 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
860 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
861 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
862 };
863
864 enum {
865 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
866 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
867 };
868
869 void mad_header_init(struct mad_header *);
870
871 # define mad_header_finish(header) /* nothing */
872
873 int mad_header_decode(struct mad_header *, struct mad_stream *);
874
875 void mad_frame_init(struct mad_frame *);
876 void mad_frame_finish(struct mad_frame *);
877
878 int mad_frame_decode(struct mad_frame *, struct mad_stream *);
879
880 void mad_frame_mute(struct mad_frame *);
881
882 # endif
883
884 /* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */
885
886 # ifndef LIBMAD_SYNTH_H
887 # define LIBMAD_SYNTH_H
888
889
890 struct mad_pcm {
891 unsigned int samplerate; /* sampling frequency (Hz) */
892 unsigned short channels; /* number of channels */
893 unsigned short length; /* number of samples per channel */
894 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
895 };
896
897 struct mad_synth {
898 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
899 /* [ch][eo][peo][s][v] */
900
901 unsigned int phase; /* current processing phase */
902
903 struct mad_pcm pcm; /* PCM output */
904 };
905
906 /* single channel PCM selector */
907 enum {
908 MAD_PCM_CHANNEL_SINGLE = 0
909 };
910
911 /* dual channel PCM selector */
912 enum {
913 MAD_PCM_CHANNEL_DUAL_1 = 0,
914 MAD_PCM_CHANNEL_DUAL_2 = 1
915 };
916
917 /* stereo PCM selector */
918 enum {
919 MAD_PCM_CHANNEL_STEREO_LEFT = 0,
920 MAD_PCM_CHANNEL_STEREO_RIGHT = 1
921 };
922
923 void mad_synth_init(struct mad_synth *);
924
925 # define mad_synth_finish(synth) /* nothing */
926
927 void mad_synth_mute(struct mad_synth *);
928
929 void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
930
931 # endif
932
933 /* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */
934
935 # ifndef LIBMAD_DECODER_H
936 # define LIBMAD_DECODER_H
937
938
939 enum mad_decoder_mode {
940 MAD_DECODER_MODE_SYNC = 0,
941 MAD_DECODER_MODE_ASYNC
942 };
943
944 enum mad_flow {
945 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
946 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
947 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
948 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
949 };
950
951 struct mad_decoder {
952 enum mad_decoder_mode mode;
953
954 int options;
955
956 struct {
957 long pid;
958 int in;
959 int out;
960 } async;
961
962 struct {
963 struct mad_stream stream;
964 struct mad_frame frame;
965 struct mad_synth synth;
966 } *sync;
967
968 void *cb_data;
969
970 enum mad_flow (*input_func)(void *, struct mad_stream *);
971 enum mad_flow (*header_func)(void *, struct mad_header const *);
972 enum mad_flow (*filter_func)(void *,
973 struct mad_stream const *, struct mad_frame *);
974 enum mad_flow (*output_func)(void *,
975 struct mad_header const *, struct mad_pcm *);
976 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
977 enum mad_flow (*message_func)(void *, void *, unsigned int *);
978 };
979
980 void mad_decoder_init(struct mad_decoder *, void *,
981 enum mad_flow (*)(void *, struct mad_stream *),
982 enum mad_flow (*)(void *, struct mad_header const *),
983 enum mad_flow (*)(void *,
984 struct mad_stream const *,
985 struct mad_frame *),
986 enum mad_flow (*)(void *,
987 struct mad_header const *,
988 struct mad_pcm *),
989 enum mad_flow (*)(void *,
990 struct mad_stream *,
991 struct mad_frame *),
992 enum mad_flow (*)(void *, void *, unsigned int *));
993 int mad_decoder_finish(struct mad_decoder *);
994
995 # define mad_decoder_options(decoder, opts) \
996 ((void) ((decoder)->options = (opts)))
997
998 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
999 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
1000
1001 # endif
1002
1003 #ifdef __cplusplus
1004 }
1005 #endif
1006