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 //# define FPM_DEFAULT
28
29 #if 0 //MEANX
30
31 # define SIZEOF_INT 4
32 # define SIZEOF_LONG 8
33 # define SIZEOF_LONG_LONG 8
34 #else
35 typedef int32_t mad_fixed_t ;
36 typedef int32_t mad_fixed64hi_t ;
37 typedef uint32_t mad_fixed64lo_t ;
38
39 #endif //MEANX
40
41 /* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */
42
43 # ifndef LIBMAD_VERSION_H
44 # define LIBMAD_VERSION_H
45
46 # define MAD_VERSION_MAJOR 0
47 # define MAD_VERSION_MINOR 15
48 # define MAD_VERSION_PATCH 1
49 # define MAD_VERSION_EXTRA " (beta)"
50
51 # define MAD_VERSION_STRINGIZE(str) #str
52 # define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
53
54 # define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
55 MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
56 MAD_VERSION_STRING(MAD_VERSION_PATCH) \
57 MAD_VERSION_EXTRA
58
59 # define MAD_PUBLISHYEAR "2000-2004"
60 # define MAD_AUTHOR "Underbit Technologies, Inc."
61 # define MAD_EMAIL "info@underbit.com"
62
63 extern char const mad_version[];
64 extern char const mad_copyright[];
65 extern char const mad_author[];
66 extern char const mad_build[];
67
68 # endif
69
70 /* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */
71
72 # ifndef LIBMAD_FIXED_H
73 # define LIBMAD_FIXED_H
74 #if 0 //MEANX
75 # if SIZEOF_INT >= 4
76 typedef signed int mad_fixed_t;
77
78 typedef signed int mad_fixed64hi_t;
79 typedef unsigned int mad_fixed64lo_t;
80 # else
81 typedef signed long mad_fixed_t;
82
83 typedef signed long mad_fixed64hi_t;
84 typedef unsigned long mad_fixed64lo_t;
85 # endif
86 #endif
87 # if defined(_MSC_VER)
88 # define mad_fixed64_t signed __int64
89 # elif 1 || defined(__GNUC__)
90 # define mad_fixed64_t signed long long
91 # endif
92
93 # if defined(FPM_FLOAT)
94 typedef double mad_sample_t;
95 # else
96 typedef mad_fixed_t mad_sample_t;
97 # endif
98
99 /*
100 * Fixed-point format: 0xABBBBBBB
101 * A == whole part (sign + 3 bits)
102 * B == fractional part (28 bits)
103 *
104 * Values are signed two's complement, so the effective range is:
105 * 0x80000000 to 0x7fffffff
106 * -8.0 to +7.9999999962747097015380859375
107 *
108 * The smallest representable value is:
109 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
110 *
111 * 28 bits of fractional accuracy represent about
112 * 8.6 digits of decimal accuracy.
113 *
114 * Fixed-point numbers can be added or subtracted as normal
115 * integers, but multiplication requires shifting the 64-bit result
116 * from 56 fractional bits back to 28 (and rounding.)
117 *
118 * Changing the definition of MAD_F_FRACBITS is only partially
119 * supported, and must be done with care.
120 */
121
122 # define MAD_F_FRACBITS 28
123
124 # if MAD_F_FRACBITS == 28
125 # define MAD_F(x) ((mad_fixed_t) (x##L))
126 # else
127 # if MAD_F_FRACBITS < 28
128 # warning "MAD_F_FRACBITS < 28"
129 # define MAD_F(x) ((mad_fixed_t) \
130 (((x##L) + \
131 (1L << (28 - MAD_F_FRACBITS - 1))) >> \
132 (28 - MAD_F_FRACBITS)))
133 # elif MAD_F_FRACBITS > 28
134 # error "MAD_F_FRACBITS > 28 not currently supported"
135 # define MAD_F(x) ((mad_fixed_t) \
136 ((x##L) << (MAD_F_FRACBITS - 28)))
137 # endif
138 # endif
139
140 # define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
141 # define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)
142
143 # define MAD_F_ONE MAD_F(0x10000000)
144
145 # define mad_f_tofixed(x) ((mad_fixed_t) \
146 ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
147 # define mad_f_todouble(x) ((double) \
148 ((x) / (double) (1L << MAD_F_FRACBITS)))
149
150 # define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
151 # define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
152 /* (x should be positive) */
153
154 # define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)
155
156 # define mad_f_add(x, y) ((x) + (y))
157 # define mad_f_sub(x, y) ((x) - (y))
158
159 # if defined(FPM_FLOAT)
160 # error "FPM_FLOAT not yet supported"
161
162 # undef MAD_F
163 # define MAD_F(x) mad_f_todouble(x)
164
165 # define mad_f_mul(x, y) ((x) * (y))
166 # define mad_f_scale64
167
168 # undef ASO_ZEROCHECK
169
170 # elif defined(FPM_64BIT)
171
172 /*
173 * This version should be the most accurate if 64-bit types are supported by
174 * the compiler, although it may not be the most efficient.
175 */
176 # if defined(OPT_ACCURACY)
177 # define mad_f_mul(x, y) \
178 ((mad_fixed_t) \
179 ((((mad_fixed64_t) (x) * (y)) + \
180 (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
181 # else
182 # define mad_f_mul(x, y) \
183 ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
184 # endif
185
186 # define MAD_F_SCALEBITS MAD_F_FRACBITS
187
188 /* --- Intel --------------------------------------------------------------- */
189
190 # elif defined(FPM_INTEL)
191
192 # if defined(_MSC_VER)
193 # pragma warning(push)
194 # pragma warning(disable: 4035) /* no return value */
195 static __forceinline
mad_f_mul_inline(mad_fixed_t x,mad_fixed_t y)196 mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
197 {
198 enum {
199 fracbits = MAD_F_FRACBITS
200 };
201
202 __asm {
203 mov eax, x
204 imul y
205 shrd eax, edx, fracbits
206 }
207
208 /* implicit return of eax */
209 }
210 # pragma warning(pop)
211
212 # define mad_f_mul mad_f_mul_inline
213 # define mad_f_scale64
214 # else
215 /*
216 * This Intel version is fast and accurate; the disposition of the least
217 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
218 */
219 # define MAD_F_MLX(hi, lo, x, y) \
220 asm ("imull %3" \
221 : "=a" (lo), "=d" (hi) \
222 : "%a" (x), "rm" (y) \
223 : "cc")
224
225 # if defined(OPT_ACCURACY)
226 /*
227 * This gives best accuracy but is not very fast.
228 */
229 # define MAD_F_MLA(hi, lo, x, y) \
230 ({ mad_fixed64hi_t __hi; \
231 mad_fixed64lo_t __lo; \
232 MAD_F_MLX(__hi, __lo, (x), (y)); \
233 asm ("addl %2,%0\n\t" \
234 "adcl %3,%1" \
235 : "=rm" (lo), "=rm" (hi) \
236 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
237 : "cc"); \
238 })
239 # endif /* OPT_ACCURACY */
240
241 # if defined(OPT_ACCURACY)
242 /*
243 * Surprisingly, this is faster than SHRD followed by ADC.
244 */
245 # define mad_f_scale64(hi, lo) \
246 ({ mad_fixed64hi_t __hi_; \
247 mad_fixed64lo_t __lo_; \
248 mad_fixed_t __result; \
249 asm ("addl %4,%2\n\t" \
250 "adcl %5,%3" \
251 : "=rm" (__lo_), "=rm" (__hi_) \
252 : "0" (lo), "1" (hi), \
253 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
254 : "cc"); \
255 asm ("shrdl %3,%2,%1" \
256 : "=rm" (__result) \
257 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
258 : "cc"); \
259 __result; \
260 })
261 # elif defined(OPT_INTEL)
262 /*
263 * Alternate Intel scaling that may or may not perform better.
264 */
265 # define mad_f_scale64(hi, lo) \
266 ({ mad_fixed_t __result; \
267 asm ("shrl %3,%1\n\t" \
268 "shll %4,%2\n\t" \
269 "orl %2,%1" \
270 : "=rm" (__result) \
271 : "0" (lo), "r" (hi), \
272 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
273 : "cc"); \
274 __result; \
275 })
276 # else
277 # define mad_f_scale64(hi, lo) \
278 ({ mad_fixed_t __result; \
279 asm ("shrdl %3,%2,%1" \
280 : "=rm" (__result) \
281 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
282 : "cc"); \
283 __result; \
284 })
285 # endif /* OPT_ACCURACY */
286
287 # define MAD_F_SCALEBITS MAD_F_FRACBITS
288 # endif
289
290 /* --- ARM ----------------------------------------------------------------- */
291
292 # elif defined(FPM_ARM)
293
294 /*
295 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The
296 * least significant bit is properly rounded at no CPU cycle cost!
297 */
298 # if 1
299 /*
300 * This is faster than the default implementation via MAD_F_MLX() and
301 * mad_f_scale64().
302 */
303 # define mad_f_mul(x, y) \
304 ({ mad_fixed64hi_t __hi; \
305 mad_fixed64lo_t __lo; \
306 mad_fixed_t __result; \
307 asm ("smull %0, %1, %3, %4\n\t" \
308 "movs %0, %0, lsr %5\n\t" \
309 "adc %2, %0, %1, lsl %6" \
310 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
311 : "%r" (x), "r" (y), \
312 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
313 : "cc"); \
314 __result; \
315 })
316 # endif
317
318 # define MAD_F_MLX(hi, lo, x, y) \
319 asm ("smull %0, %1, %2, %3" \
320 : "=&r" (lo), "=&r" (hi) \
321 : "%r" (x), "r" (y))
322
323 # define MAD_F_MLA(hi, lo, x, y) \
324 asm ("smlal %0, %1, %2, %3" \
325 : "+r" (lo), "+r" (hi) \
326 : "%r" (x), "r" (y))
327
328 # define MAD_F_MLN(hi, lo) \
329 asm ("rsbs %0, %2, #0\n\t" \
330 "rsc %1, %3, #0" \
331 : "=r" (lo), "=r" (hi) \
332 : "0" (lo), "1" (hi) \
333 : "cc")
334
335 # define mad_f_scale64(hi, lo) \
336 ({ mad_fixed_t __result; \
337 asm ("movs %0, %1, lsr %3\n\t" \
338 "adc %0, %0, %2, lsl %4" \
339 : "=&r" (__result) \
340 : "r" (lo), "r" (hi), \
341 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
342 : "cc"); \
343 __result; \
344 })
345
346 # define MAD_F_SCALEBITS MAD_F_FRACBITS
347
348 /* --- MIPS ---------------------------------------------------------------- */
349
350 # elif defined(FPM_MIPS)
351
352 /*
353 * This MIPS version is fast and accurate; the disposition of the least
354 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
355 */
356 # define MAD_F_MLX(hi, lo, x, y) \
357 asm ("mult %2,%3" \
358 : "=l" (lo), "=h" (hi) \
359 : "%r" (x), "r" (y))
360
361 # if defined(HAVE_MADD_ASM)
362 # define MAD_F_MLA(hi, lo, x, y) \
363 asm ("madd %2,%3" \
364 : "+l" (lo), "+h" (hi) \
365 : "%r" (x), "r" (y))
366 # elif defined(HAVE_MADD16_ASM)
367 /*
368 * This loses significant accuracy due to the 16-bit integer limit in the
369 * multiply/accumulate instruction.
370 */
371 # define MAD_F_ML0(hi, lo, x, y) \
372 asm ("mult %2,%3" \
373 : "=l" (lo), "=h" (hi) \
374 : "%r" ((x) >> 12), "r" ((y) >> 16))
375 # define MAD_F_MLA(hi, lo, x, y) \
376 asm ("madd16 %2,%3" \
377 : "+l" (lo), "+h" (hi) \
378 : "%r" ((x) >> 12), "r" ((y) >> 16))
379 # define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
380 # endif
381
382 # if defined(OPT_SPEED)
383 # define mad_f_scale64(hi, lo) \
384 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
385 # define MAD_F_SCALEBITS MAD_F_FRACBITS
386 # endif
387
388 /* --- SPARC --------------------------------------------------------------- */
389
390 # elif defined(FPM_SPARC)
391
392 /*
393 * This SPARC V8 version is fast and accurate; the disposition of the least
394 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
395 */
396 # define MAD_F_MLX(hi, lo, x, y) \
397 asm ("smul %2, %3, %0\n\t" \
398 "rd %%y, %1" \
399 : "=r" (lo), "=r" (hi) \
400 : "%r" (x), "rI" (y))
401
402 /* --- PowerPC ------------------------------------------------------------- */
403
404 # elif defined(FPM_PPC)
405
406 /*
407 * This PowerPC version is fast and accurate; the disposition of the least
408 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
409 */
410 # define MAD_F_MLX(hi, lo, x, y) \
411 do { \
412 asm ("mullw %0,%1,%2" \
413 : "=r" (lo) \
414 : "%r" (x), "r" (y)); \
415 asm ("mulhw %0,%1,%2" \
416 : "=r" (hi) \
417 : "%r" (x), "r" (y)); \
418 } \
419 while (0)
420
421 # if defined(OPT_ACCURACY)
422 /*
423 * This gives best accuracy but is not very fast.
424 */
425 # define MAD_F_MLA(hi, lo, x, y) \
426 ({ mad_fixed64hi_t __hi; \
427 mad_fixed64lo_t __lo; \
428 MAD_F_MLX(__hi, __lo, (x), (y)); \
429 asm ("addc %0,%2,%3\n\t" \
430 "adde %1,%4,%5" \
431 : "=r" (lo), "=r" (hi) \
432 : "%r" (lo), "r" (__lo), \
433 "%r" (hi), "r" (__hi) \
434 : "xer"); \
435 })
436 # endif
437
438 # if defined(OPT_ACCURACY)
439 /*
440 * This is slower than the truncating version below it.
441 */
442 # define mad_f_scale64(hi, lo) \
443 ({ mad_fixed_t __result, __round; \
444 asm ("rotrwi %0,%1,%2" \
445 : "=r" (__result) \
446 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
447 asm ("extrwi %0,%1,1,0" \
448 : "=r" (__round) \
449 : "r" (__result)); \
450 asm ("insrwi %0,%1,%2,0" \
451 : "+r" (__result) \
452 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
453 asm ("add %0,%1,%2" \
454 : "=r" (__result) \
455 : "%r" (__result), "r" (__round)); \
456 __result; \
457 })
458 # else
459 # define mad_f_scale64(hi, lo) \
460 ({ mad_fixed_t __result; \
461 asm ("rotrwi %0,%1,%2" \
462 : "=r" (__result) \
463 : "r" (lo), "i" (MAD_F_SCALEBITS)); \
464 asm ("insrwi %0,%1,%2,0" \
465 : "+r" (__result) \
466 : "r" (hi), "i" (MAD_F_SCALEBITS)); \
467 __result; \
468 })
469 # endif
470
471 # define MAD_F_SCALEBITS MAD_F_FRACBITS
472
473 /* --- Default ------------------------------------------------------------- */
474
475 # elif defined(FPM_DEFAULT)
476
477 /*
478 * This version is the most portable but it loses significant accuracy.
479 * Furthermore, accuracy is biased against the second argument, so care
480 * should be taken when ordering operands.
481 *
482 * The scale factors are constant as this is not used with SSO.
483 *
484 * Pre-rounding is required to stay within the limits of compliance.
485 */
486 # if defined(OPT_SPEED)
487 # define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
488 # else
489 # define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
490 (((y) + (1L << 15)) >> 16))
491 # endif
492
493 /* ------------------------------------------------------------------------- */
494
495 # else
496 # error "no FPM selected"
497 # endif
498
499 /* default implementations */
500
501 # if !defined(mad_f_mul)
502 # define mad_f_mul(x, y) \
503 ({ register mad_fixed64hi_t __hi; \
504 register mad_fixed64lo_t __lo; \
505 MAD_F_MLX(__hi, __lo, (x), (y)); \
506 mad_f_scale64(__hi, __lo); \
507 })
508 # endif
509
510 # if !defined(MAD_F_MLA)
511 # define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
512 # define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
513 # define MAD_F_MLN(hi, lo) ((lo) = -(lo))
514 # define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
515 # endif
516
517 # if !defined(MAD_F_ML0)
518 # define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
519 # endif
520
521 # if !defined(MAD_F_MLN)
522 # define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
523 # endif
524
525 # if !defined(MAD_F_MLZ)
526 # define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
527 # endif
528
529 # if !defined(mad_f_scale64)
530 # if defined(OPT_ACCURACY)
531 # define mad_f_scale64(hi, lo) \
532 ((((mad_fixed_t) \
533 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
534 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
535 # else
536 # define mad_f_scale64(hi, lo) \
537 ((mad_fixed_t) \
538 (((hi) << (32 - MAD_F_SCALEBITS)) | \
539 ((lo) >> MAD_F_SCALEBITS)))
540 # endif
541 # define MAD_F_SCALEBITS MAD_F_FRACBITS
542 # endif
543
544 /* C routines */
545
546 mad_fixed_t mad_f_abs(mad_fixed_t);
547 mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);
548
549 # endif
550
551 /* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */
552
553 # ifndef LIBMAD_BIT_H
554 # define LIBMAD_BIT_H
555
556 struct mad_bitptr {
557 unsigned char const *byte;
558 unsigned short cache;
559 unsigned short left;
560 };
561
562 void mad_bit_init(struct mad_bitptr *, unsigned char const *);
563
564 # define mad_bit_finish(bitptr) /* nothing */
565
566 unsigned int mad_bit_length(struct mad_bitptr const *,
567 struct mad_bitptr const *);
568
569 # define mad_bit_bitsleft(bitptr) ((bitptr)->left)
570 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
571
572 void mad_bit_skip(struct mad_bitptr *, unsigned int);
573 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
574 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
575
576 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
577
578 # endif
579
580 /* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */
581
582 # ifndef LIBMAD_TIMER_H
583 # define LIBMAD_TIMER_H
584
585 typedef struct {
586 signed long seconds; /* whole seconds */
587 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
588 } mad_timer_t;
589
590 extern mad_timer_t const mad_timer_zero;
591
592 # define MAD_TIMER_RESOLUTION 352800000UL
593
594 enum mad_units {
595 MAD_UNITS_HOURS = -2,
596 MAD_UNITS_MINUTES = -1,
597 MAD_UNITS_SECONDS = 0,
598
599 /* metric units */
600
601 MAD_UNITS_DECISECONDS = 10,
602 MAD_UNITS_CENTISECONDS = 100,
603 MAD_UNITS_MILLISECONDS = 1000,
604
605 /* audio sample units */
606
607 MAD_UNITS_8000_HZ = 8000,
608 MAD_UNITS_11025_HZ = 11025,
609 MAD_UNITS_12000_HZ = 12000,
610
611 MAD_UNITS_16000_HZ = 16000,
612 MAD_UNITS_22050_HZ = 22050,
613 MAD_UNITS_24000_HZ = 24000,
614
615 MAD_UNITS_32000_HZ = 32000,
616 MAD_UNITS_44100_HZ = 44100,
617 MAD_UNITS_48000_HZ = 48000,
618
619 /* video frame/field units */
620
621 MAD_UNITS_24_FPS = 24,
622 MAD_UNITS_25_FPS = 25,
623 MAD_UNITS_30_FPS = 30,
624 MAD_UNITS_48_FPS = 48,
625 MAD_UNITS_50_FPS = 50,
626 MAD_UNITS_60_FPS = 60,
627
628 /* CD audio frames */
629
630 MAD_UNITS_75_FPS = 75,
631
632 /* video drop-frame units */
633
634 MAD_UNITS_23_976_FPS = -24,
635 MAD_UNITS_24_975_FPS = -25,
636 MAD_UNITS_29_97_FPS = -30,
637 MAD_UNITS_47_952_FPS = -48,
638 MAD_UNITS_49_95_FPS = -50,
639 MAD_UNITS_59_94_FPS = -60
640 };
641
642 # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
643
644 int mad_timer_compare(mad_timer_t, mad_timer_t);
645
646 # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
647
648 void mad_timer_negate(mad_timer_t *);
649 mad_timer_t mad_timer_abs(mad_timer_t);
650
651 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
652 void mad_timer_add(mad_timer_t *, mad_timer_t);
653 void mad_timer_multiply(mad_timer_t *, signed long);
654
655 signed long mad_timer_count(mad_timer_t, enum mad_units);
656 unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
657 void mad_timer_string(mad_timer_t, char *, char const *,
658 enum mad_units, enum mad_units, unsigned long);
659
660 # endif
661
662 /* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */
663
664 # ifndef LIBMAD_STREAM_H
665 # define LIBMAD_STREAM_H
666
667
668 # define MAD_BUFFER_GUARD 8
669 # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
670
671 enum mad_error {
672 MAD_ERROR_NONE = 0x0000, /* no error */
673
674 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
675 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
676
677 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
678
679 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
680 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
681 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
682 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
683 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
684
685 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
686 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
687 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
688 MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
689 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
690 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
691 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
692 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
693 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
694 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
695 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
696 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
697 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
698 };
699
700 # define MAD_RECOVERABLE(error) ((error) & 0xff00)
701
702 struct mad_stream {
703 unsigned char const *buffer; /* input bitstream buffer */
704 unsigned char const *bufend; /* end of buffer */
705 unsigned long skiplen; /* bytes to skip before next frame */
706
707 int sync; /* stream sync found */
708 unsigned long freerate; /* free bitrate (fixed) */
709
710 unsigned char const *this_frame; /* start of current frame */
711 unsigned char const *next_frame; /* start of next frame */
712 struct mad_bitptr ptr; /* current processing bit pointer */
713
714 struct mad_bitptr anc_ptr; /* ancillary bits pointer */
715 unsigned int anc_bitlen; /* number of ancillary bits */
716
717 unsigned char (*main_data)[MAD_BUFFER_MDLEN];
718 /* Layer III main_data() */
719 unsigned int md_len; /* bytes in main_data */
720
721 int options; /* decoding options (see below) */
722 enum mad_error error; /* error code (see above) */
723 };
724
725 enum {
726 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
727 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
728 # if 0 /* not yet implemented */
729 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
730 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
731 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
732 # endif
733 };
734
735 void mad_stream_init(struct mad_stream *);
736 void mad_stream_finish(struct mad_stream *);
737
738 # define mad_stream_options(stream, opts) \
739 ((void) ((stream)->options = (opts)))
740
741 void mad_stream_buffer(struct mad_stream *,
742 unsigned char const *, unsigned long);
743 void mad_stream_skip(struct mad_stream *, unsigned long);
744
745 int mad_stream_sync(struct mad_stream *);
746
747 char const *mad_stream_errorstr(struct mad_stream const *);
748
749 # endif
750
751 /* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */
752
753 # ifndef LIBMAD_FRAME_H
754 # define LIBMAD_FRAME_H
755
756
757 enum mad_layer {
758 MAD_LAYER_I = 1, /* Layer I */
759 MAD_LAYER_II = 2, /* Layer II */
760 MAD_LAYER_III = 3 /* Layer III */
761 };
762
763 enum mad_mode {
764 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
765 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
766 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
767 MAD_MODE_STEREO = 3 /* normal LR stereo */
768 };
769
770 enum mad_emphasis {
771 MAD_EMPHASIS_NONE = 0, /* no emphasis */
772 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
773 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
774 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
775 };
776
777 struct mad_header {
778 enum mad_layer layer; /* audio layer (1, 2, or 3) */
779 enum mad_mode mode; /* channel mode (see above) */
780 int mode_extension; /* additional mode info */
781 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
782
783 unsigned long bitrate; /* stream bitrate (bps) */
784 unsigned int samplerate; /* sampling frequency (Hz) */
785
786 unsigned short crc_check; /* frame CRC accumulator */
787 unsigned short crc_target; /* final target CRC checksum */
788
789 int flags; /* flags (see below) */
790 int private_bits; /* private bits (see below) */
791
792 mad_timer_t duration; /* audio playing time of frame */
793 };
794
795 struct mad_frame {
796 struct mad_header header; /* MPEG audio header */
797
798 int options; /* decoding options (from stream) */
799
800 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
801 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
802 };
803
804 # define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
805 # define MAD_NSBSAMPLES(header) \
806 ((header)->layer == MAD_LAYER_I ? 12 : \
807 (((header)->layer == MAD_LAYER_III && \
808 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
809
810 enum {
811 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
812 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
813
814 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
815 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
816 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
817 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
818
819 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
820 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
821 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
822
823 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
824 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
825 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
826 };
827
828 enum {
829 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
830 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
831 };
832
833 void mad_header_init(struct mad_header *);
834
835 # define mad_header_finish(header) /* nothing */
836
837 int mad_header_decode(struct mad_header *, struct mad_stream *);
838
839 void mad_frame_init(struct mad_frame *);
840 void mad_frame_finish(struct mad_frame *);
841
842 int mad_frame_decode(struct mad_frame *, struct mad_stream *);
843
844 void mad_frame_mute(struct mad_frame *);
845
846 # endif
847
848 /* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */
849
850 # ifndef LIBMAD_SYNTH_H
851 # define LIBMAD_SYNTH_H
852
853
854 struct mad_pcm {
855 unsigned int samplerate; /* sampling frequency (Hz) */
856 unsigned short channels; /* number of channels */
857 unsigned short length; /* number of samples per channel */
858 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
859 };
860
861 struct mad_synth {
862 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
863 /* [ch][eo][peo][s][v] */
864
865 unsigned int phase; /* current processing phase */
866
867 struct mad_pcm pcm; /* PCM output */
868 };
869
870 /* single channel PCM selector */
871 enum {
872 MAD_PCM_CHANNEL_SINGLE = 0
873 };
874
875 /* dual channel PCM selector */
876 enum {
877 MAD_PCM_CHANNEL_DUAL_1 = 0,
878 MAD_PCM_CHANNEL_DUAL_2 = 1
879 };
880
881 /* stereo PCM selector */
882 enum {
883 MAD_PCM_CHANNEL_STEREO_LEFT = 0,
884 MAD_PCM_CHANNEL_STEREO_RIGHT = 1
885 };
886
887 void mad_synth_init(struct mad_synth *);
888
889 # define mad_synth_finish(synth) /* nothing */
890
891 void mad_synth_mute(struct mad_synth *);
892
893 void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
894
895 # endif
896
897 /* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */
898
899 # ifndef LIBMAD_DECODER_H
900 # define LIBMAD_DECODER_H
901
902
903 enum mad_decoder_mode {
904 MAD_DECODER_MODE_SYNC = 0,
905 MAD_DECODER_MODE_ASYNC
906 };
907
908 enum mad_flow {
909 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
910 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
911 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
912 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
913 };
914
915 struct mad_decoder {
916 enum mad_decoder_mode mode;
917
918 int options;
919
920 struct {
921 long pid;
922 int in;
923 int out;
924 } async;
925
926 struct {
927 struct mad_stream stream;
928 struct mad_frame frame;
929 struct mad_synth synth;
930 } *sync;
931
932 void *cb_data;
933
934 enum mad_flow (*input_func)(void *, struct mad_stream *);
935 enum mad_flow (*header_func)(void *, struct mad_header const *);
936 enum mad_flow (*filter_func)(void *,
937 struct mad_stream const *, struct mad_frame *);
938 enum mad_flow (*output_func)(void *,
939 struct mad_header const *, struct mad_pcm *);
940 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
941 enum mad_flow (*message_func)(void *, void *, unsigned int *);
942 };
943
944 void mad_decoder_init(struct mad_decoder *, void *,
945 enum mad_flow (*)(void *, struct mad_stream *),
946 enum mad_flow (*)(void *, struct mad_header const *),
947 enum mad_flow (*)(void *,
948 struct mad_stream const *,
949 struct mad_frame *),
950 enum mad_flow (*)(void *,
951 struct mad_header const *,
952 struct mad_pcm *),
953 enum mad_flow (*)(void *,
954 struct mad_stream *,
955 struct mad_frame *),
956 enum mad_flow (*)(void *, void *, unsigned int *));
957 int mad_decoder_finish(struct mad_decoder *);
958
959 # define mad_decoder_options(decoder, opts) \
960 ((void) ((decoder)->options = (opts)))
961
962 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
963 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
964
965 # endif
966
967 # ifdef __cplusplus
968 }
969 # endif
970