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1/*
2 * libmad - MPEG audio decoder library
3 * Copyright (C) 2000-2001 Robert Leslie
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 the author: Robert Leslie <rob@mars.org>
21 */
22
23# ifdef __cplusplus
24extern "C" {
25# endif
26
27# define FPM_INTEL
28
29# define SIZEOF_INT 4
30# define SIZEOF_LONG 4
31# define SIZEOF_LONG_LONG 8
32
33/* Id: version.h,v 1.20 2001/10/27 22:47:32 rob Exp */
34
35# ifndef LIBMAD_VERSION_H
36# define LIBMAD_VERSION_H
37
38# define MAD_VERSION_MAJOR 0
39# define MAD_VERSION_MINOR 14
40# define MAD_VERSION_PATCH 2
41# define MAD_VERSION_EXTRA " (beta)"
42
43# define MAD_VERSION_STRINGIZE(str) #str
44# define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
45
46# define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
47 MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
48 MAD_VERSION_STRING(MAD_VERSION_PATCH) \
49 MAD_VERSION_EXTRA
50
51# define MAD_PUBLISHYEAR "2000-2001"
52# define MAD_AUTHOR "Robert Leslie"
53# define MAD_EMAIL "rob@mars.org"
54
55extern char const mad_version[];
56extern char const mad_copyright[];
57extern char const mad_author[];
58extern char const mad_build[];
59
60# endif
61
62/* Id: fixed.h,v 1.30 2001/11/02 09:51:06 rob Exp */
63
64# ifndef LIBMAD_FIXED_H
65# define LIBMAD_FIXED_H
66
67# if SIZEOF_INT >= 4
68typedef signed int mad_fixed_t;
69
70typedef signed int mad_fixed64hi_t;
71typedef unsigned int mad_fixed64lo_t;
72# else
73typedef signed long mad_fixed_t;
74
75typedef signed long mad_fixed64hi_t;
76typedef unsigned long mad_fixed64lo_t;
77# endif
78
79# if defined(_MSC_VER)
80# define mad_fixed64_t signed __int64
81# elif 1 || defined(__GNUC__)
82# define mad_fixed64_t signed long long
83# endif
84
85# if defined(FPM_FLOAT)
86typedef double mad_sample_t;
87# else
88typedef mad_fixed_t mad_sample_t;
89# endif
90
91/*
92 * Fixed-point format: 0xABBBBBBB
93 * A == whole part (sign + 3 bits)
94 * B == fractional part (28 bits)
95 *
96 * Values are signed two's complement, so the effective range is:
97 * 0x80000000 to 0x7fffffff
98 * -8.0 to +7.9999999962747097015380859375
99 *
100 * The smallest representable value is:
101 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
102 *
103 * 28 bits of fractional accuracy represent about
104 * 8.6 digits of decimal accuracy.
105 *
106 * Fixed-point numbers can be added or subtracted as normal
107 * integers, but multiplication requires shifting the 64-bit result
108 * from 56 fractional bits back to 28 (and rounding.)
109 *
110 * Changing the definition of MAD_F_FRACBITS is only partially
111 * supported, and must be done with care.
112 */
113
114# define MAD_F_FRACBITS 28
115
116# if MAD_F_FRACBITS == 28
117# define MAD_F(x) ((mad_fixed_t) (x##L))
118# else
119# if MAD_F_FRACBITS < 28
120# warning "MAD_F_FRACBITS < 28"
121# define MAD_F(x) ((mad_fixed_t) \
122 (((x##L) + \
123 (1L << (28 - MAD_F_FRACBITS - 1))) >> \
124 (28 - MAD_F_FRACBITS)))
125# elif MAD_F_FRACBITS > 28
126# error "MAD_F_FRACBITS > 28 not currently supported"
127# define MAD_F(x) ((mad_fixed_t) \
128 ((x##L) << (MAD_F_FRACBITS - 28)))
129# endif
130# endif
131
132# define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
133# define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)
134
135# define MAD_F_ONE MAD_F(0x10000000)
136
137# define mad_f_tofixed(x) ((mad_fixed_t) \
138 ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
139# define mad_f_todouble(x) ((double) \
140 ((x) / (double) (1L << MAD_F_FRACBITS)))
141
142# define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
143# define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
144 /* (x should be positive) */
145
146# define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)
147
148# define mad_f_add(x, y) ((x) + (y))
149# define mad_f_sub(x, y) ((x) - (y))
150
151# if defined(FPM_FLOAT)
152# error "FPM_FLOAT not yet supported"
153
154# undef MAD_F
155# define MAD_F(x) mad_f_todouble(x)
156
157# define mad_f_mul(x, y) ((x) * (y))
158# define mad_f_scale64
159
160# undef ASO_ZEROCHECK
161
162# elif defined(FPM_64BIT)
163
164/*
165 * This version should be the most accurate if 64-bit types are supported by
166 * the compiler, although it may not be the most efficient.
167 */
168# if defined(OPT_ACCURACY)
169# define mad_f_mul(x, y) \
170 ((mad_fixed_t) \
171 ((((mad_fixed64_t) (x) * (y)) + \
172 (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
173# else
174# define mad_f_mul(x, y) \
175 ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
176# endif
177
178# define MAD_F_SCALEBITS MAD_F_FRACBITS
179
180/* --- Intel --------------------------------------------------------------- */
181
182# elif defined(FPM_INTEL)
183
184# if defined(_MSC_VER)
185# pragma warning(push)
186# pragma warning(disable: 4035) /* no return value */
187static __forceinline
188mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
189{
190 enum {
191 fracbits = MAD_F_FRACBITS
192 };
193
194 __asm {
195 mov eax, x
196 imul y
197 shrd eax, edx, fracbits
198 }
199
200 /* implicit return of eax */
201}
202# pragma warning(pop)
203
204# define mad_f_mul mad_f_mul_inline
205# define mad_f_scale64
206# else
207/*
208 * This Intel version is fast and accurate; the disposition of the least
209 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
210 */
211# define MAD_F_MLX(hi, lo, x, y) \
212 asm ("imull %3" \
213 : "=a" (lo), "=d" (hi) \
214 : "%a" (x), "rm" (y) \
215 : "cc")
216
217# if defined(OPT_ACCURACY)
218/*
219 * This gives best accuracy but is not very fast.
220 */
221# define MAD_F_MLA(hi, lo, x, y) \
222 ({ mad_fixed64hi_t __hi; \
223 mad_fixed64lo_t __lo; \
224 MAD_F_MLX(__hi, __lo, (x), (y)); \
225 asm ("addl %2,%0\n\t" \
226 "adcl %3,%1" \
227 : "=rm" (lo), "=rm" (hi) \
228 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
229 : "cc"); \
230 })
231# endif /* OPT_ACCURACY */
232
233# if defined(OPT_ACCURACY)
234/*
235 * Surprisingly, this is faster than SHRD followed by ADC.
236 */
237# define mad_f_scale64(hi, lo) \
238 ({ mad_fixed64hi_t __hi_; \
239 mad_fixed64lo_t __lo_; \
240 mad_fixed_t __result; \
241 asm ("addl %4,%2\n\t" \
242 "adcl %5,%3" \
243 : "=rm" (__lo_), "=rm" (__hi_) \
244 : "0" (lo), "1" (hi), \
245 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
246 : "cc"); \
247 asm ("shrdl %3,%2,%1" \
248 : "=rm" (__result) \
249 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
250 : "cc"); \
251 __result; \
252 })
253# else
254# define mad_f_scale64(hi, lo) \
255 ({ mad_fixed_t __result; \
256 asm ("shrdl %3,%2,%1" \
257 : "=rm" (__result) \
258 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
259 : "cc"); \
260 __result; \
261 })
262# endif /* OPT_ACCURACY */
263
264# define MAD_F_SCALEBITS MAD_F_FRACBITS
265# endif
266
267/* --- ARM ----------------------------------------------------------------- */
268
269# elif defined(FPM_ARM)
270
271/*
272 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The
273 * least significant bit is properly rounded at no CPU cycle cost!
274 */
275# if 1
276/*
277 * There's a bug somewhere, possibly in the compiler, that sometimes makes
278 * this necessary instead of the default implementation via MAD_F_MLX and
279 * mad_f_scale64. It may be related to the use (or lack) of
280 * -finline-functions and/or -fstrength-reduce.
281 *
282 * This is also apparently faster than MAD_F_MLX/mad_f_scale64.
283 */
284# define mad_f_mul(x, y) \
285 ({ mad_fixed64hi_t __hi; \
286 mad_fixed64lo_t __lo; \
287 mad_fixed_t __result; \
288 asm ("smull %0, %1, %3, %4\n\t" \
289 "movs %0, %0, lsr %5\n\t" \
290 "adc %2, %0, %1, lsl %6" \
291 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
292 : "%r" (x), "r" (y), \
293 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
294 : "cc"); \
295 __result; \
296 })
297# endif
298
299# define MAD_F_MLX(hi, lo, x, y) \
300 asm ("smull %0, %1, %2, %3" \
301 : "=&r" (lo), "=&r" (hi) \
302 : "%r" (x), "r" (y))
303
304# define MAD_F_MLA(hi, lo, x, y) \
305 asm ("smlal %0, %1, %2, %3" \
306 : "+r" (lo), "+r" (hi) \
307 : "%r" (x), "r" (y))
308
309# define MAD_F_MLN(hi, lo) \
310 asm ("rsbs %0, %2, #0\n\t" \
311 "rsc %1, %3, #0" \
312 : "=r" (lo), "=r" (hi) \
313 : "0" (lo), "1" (hi) \
314 : "cc")
315
316# define mad_f_scale64(hi, lo) \
317 ({ mad_fixed_t __result; \
318 asm ("movs %0, %1, lsr %3\n\t" \
319 "adc %0, %0, %2, lsl %4" \
320 : "=r" (__result) \
321 : "r" (lo), "r" (hi), \
322 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
323 : "cc"); \
324 __result; \
325 })
326
327# define MAD_F_SCALEBITS MAD_F_FRACBITS
328
329/* --- MIPS ---------------------------------------------------------------- */
330
331# elif defined(FPM_MIPS)
332
333/*
334 * This MIPS version is fast and accurate; the disposition of the least
335 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
336 */
337# define MAD_F_MLX(hi, lo, x, y) \
338 asm ("mult %2,%3" \
339 : "=l" (lo), "=h" (hi) \
340 : "%r" (x), "r" (y))
341
342# if defined(HAVE_MADD_ASM)
343# define MAD_F_MLA(hi, lo, x, y) \
344 asm ("madd %2,%3" \
345 : "+l" (lo), "+h" (hi) \
346 : "%r" (x), "r" (y))
347# elif defined(HAVE_MADD16_ASM)
348/*
349 * This loses significant accuracy due to the 16-bit integer limit in the
350 * multiply/accumulate instruction.
351 */
352# define MAD_F_ML0(hi, lo, x, y) \
353 asm ("mult %2,%3" \
354 : "=l" (lo), "=h" (hi) \
355 : "%r" ((x) >> 12), "r" ((y) >> 16))
356# define MAD_F_MLA(hi, lo, x, y) \
357 asm ("madd16 %2,%3" \
358 : "+l" (lo), "+h" (hi) \
359 : "%r" ((x) >> 12), "r" ((y) >> 16))
360# define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
361# endif
362
363# if defined(OPT_SPEED)
364# define mad_f_scale64(hi, lo) \
365 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
366# define MAD_F_SCALEBITS MAD_F_FRACBITS
367# endif
368
369/* --- SPARC --------------------------------------------------------------- */
370
371# elif defined(FPM_SPARC)
372
373/*
374 * This SPARC V8 version is fast and accurate; the disposition of the least
375 * significant bit depends on OPT_ACCURACY via mad_f_scale64().
376 */
377# define MAD_F_MLX(hi, lo, x, y) \
378 asm ("smul %2, %3, %0\n\t" \
379 "rd %%y, %1" \
380 : "=r" (lo), "=r" (hi) \
381 : "%r" (x), "rI" (y))
382
383/* --- PowerPC ------------------------------------------------------------- */
384
385# elif defined(FPM_PPC)
386
387/*
388 * This PowerPC version is tuned for the 4xx embedded processors. It is
389 * effectively a tuned version of FPM_64BIT. It is a little faster and just
390 * as accurate. The disposition of the least significant bit depends on
391 * OPT_ACCURACY via mad_f_scale64().
392 */
393# define MAD_F_MLX(hi, lo, x, y) \
394 asm ("mulhw %1, %2, %3\n\t" \
395 "mullw %0, %2, %3" \
396 : "=&r" (lo), "=&r" (hi) \
397 : "%r" (x), "r" (y))
398
399# define MAD_F_MLA(hi, lo, x, y) \
400 ({ mad_fixed64hi_t __hi; \
401 mad_fixed64lo_t __lo; \
402 MAD_F_MLX(__hi, __lo, (x), (y)); \
403 asm ("addc %0, %2, %3\n\t" \
404 "adde %1, %4, %5" \
405 : "=r" (lo), "=r" (hi) \
406 : "%r" (__lo), "0" (lo), "%r" (__hi), "1" (hi)); \
407 })
408
409# if defined(OPT_ACCURACY)
410/*
411 * This is accurate and ~2 - 2.5 times slower than the unrounded version.
412 *
413 * The __volatile__ improves the generated code by another 5% (fewer spills
414 * to memory); eventually they should be removed.
415 */
416# define mad_f_scale64(hi, lo) \
417 ({ mad_fixed_t __result; \
418 mad_fixed64hi_t __hi_; \
419 mad_fixed64lo_t __lo_; \
420 asm __volatile__ ("addc %0, %2, %4\n\t" \
421 "addze %1, %3" \
422 : "=r" (__lo_), "=r" (__hi_) \
423 : "r" (lo), "r" (hi), "r" (1 << (MAD_F_SCALEBITS - 1))); \
424 asm __volatile__ ("rlwinm %0, %2,32-%3,0,%3-1\n\t" \
425 "rlwimi %0, %1,32-%3,%3,31" \
426 : "=&r" (__result) \
427 : "r" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS)); \
428 __result; \
429 })
430# else
431# define mad_f_scale64(hi, lo) \
432 ({ mad_fixed_t __result; \
433 asm ("rlwinm %0, %2,32-%3,0,%3-1\n\t" \
434 "rlwimi %0, %1,32-%3,%3,31" \
435 : "=r" (__result) \
436 : "r" (lo), "r" (hi), "I" (MAD_F_SCALEBITS)); \
437 __result; \
438 })
439# endif /* OPT_ACCURACY */
440
441# define MAD_F_SCALEBITS MAD_F_FRACBITS
442
443/* --- Default ------------------------------------------------------------- */
444
445# elif defined(FPM_DEFAULT)
446
447/*
448 * This version is the most portable but it loses significant accuracy.
449 * Furthermore, accuracy is biased against the second argument, so care
450 * should be taken when ordering operands.
451 *
452 * The scale factors are constant as this is not used with SSO.
453 *
454 * Pre-rounding is required to stay within the limits of compliance.
455 */
456# if defined(OPT_SPEED)
457# define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
458# else
459# define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
460 (((y) + (1L << 15)) >> 16))
461# endif
462
463/* ------------------------------------------------------------------------- */
464
465# else
466# error "no FPM selected"
467# endif
468
469/* default implementations */
470
471# if !defined(mad_f_mul)
472# define mad_f_mul(x, y) \
473 ({ mad_fixed64hi_t __hi; \
474 mad_fixed64lo_t __lo; \
475 MAD_F_MLX(__hi, __lo, (x), (y)); \
476 mad_f_scale64(__hi, __lo); \
477 })
478# endif
479
480# if !defined(MAD_F_MLA)
481# define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
482# define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
483# define MAD_F_MLN(hi, lo) ((lo) = -(lo))
484# define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
485# endif
486
487# if !defined(MAD_F_ML0)
488# define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
489# endif
490
491# if !defined(MAD_F_MLN)
492# define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
493# endif
494
495# if !defined(MAD_F_MLZ)
496# define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
497# endif
498
499# if !defined(mad_f_scale64)
500# if defined(OPT_ACCURACY)
501# define mad_f_scale64(hi, lo) \
502 ((((mad_fixed_t) \
503 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
504 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
505# else
506# define mad_f_scale64(hi, lo) \
507 ((mad_fixed_t) \
508 (((hi) << (32 - MAD_F_SCALEBITS)) | \
509 ((lo) >> MAD_F_SCALEBITS)))
510# endif
511# define MAD_F_SCALEBITS MAD_F_FRACBITS
512# endif
513
514/* miscellaneous C routines */
515
516mad_fixed_t mad_f_abs(mad_fixed_t);
517
518# endif
519
520/* Id: bit.h,v 1.8 2001/10/17 19:14:47 rob Exp */
521
522# ifndef LIBMAD_BIT_H
523# define LIBMAD_BIT_H
524
525struct mad_bitptr {
526 unsigned char const *byte;
527 unsigned short cache;
528 unsigned short left;
529};
530
531void mad_bit_init(struct mad_bitptr *, unsigned char const *);
532
533# define mad_bit_finish(bitptr) /* nothing */
534
535unsigned int mad_bit_length(struct mad_bitptr const *,
536 struct mad_bitptr const *);
537
538# define mad_bit_bitsleft(bitptr) ((bitptr)->left)
539unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
540
541void mad_bit_skip(struct mad_bitptr *, unsigned int);
542unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
543void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
544
545unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
546
547# endif
548
549/* Id: timer.h,v 1.12 2001/11/03 03:57:11 rob Exp */
550
551# ifndef LIBMAD_TIMER_H
552# define LIBMAD_TIMER_H
553
554typedef struct {
555 signed long seconds; /* whole seconds */
556 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
557} mad_timer_t;
558
559extern mad_timer_t const mad_timer_zero;
560
561# define MAD_TIMER_RESOLUTION 352800000UL
562
563enum mad_units {
564 MAD_UNITS_HOURS = -2,
565 MAD_UNITS_MINUTES = -1,
566 MAD_UNITS_SECONDS = 0,
567
568 /* metric units */
569
570 MAD_UNITS_DECISECONDS = 10,
571 MAD_UNITS_CENTISECONDS = 100,
572 MAD_UNITS_MILLISECONDS = 1000,
573
574 /* audio sample units */
575
576 MAD_UNITS_8000_HZ = 8000,
577 MAD_UNITS_11025_HZ = 11025,
578 MAD_UNITS_12000_HZ = 12000,
579
580 MAD_UNITS_16000_HZ = 16000,
581 MAD_UNITS_22050_HZ = 22050,
582 MAD_UNITS_24000_HZ = 24000,
583
584 MAD_UNITS_32000_HZ = 32000,
585 MAD_UNITS_44100_HZ = 44100,
586 MAD_UNITS_48000_HZ = 48000,
587
588 /* video frame/field units */
589
590 MAD_UNITS_24_FPS = 24,
591 MAD_UNITS_25_FPS = 25,
592 MAD_UNITS_30_FPS = 30,
593 MAD_UNITS_48_FPS = 48,
594 MAD_UNITS_50_FPS = 50,
595 MAD_UNITS_60_FPS = 60,
596
597 /* CD audio frames */
598
599 MAD_UNITS_75_FPS = 75,
600
601 /* video drop-frame units */
602
603 MAD_UNITS_23_976_FPS = -24,
604 MAD_UNITS_24_975_FPS = -25,
605 MAD_UNITS_29_97_FPS = -30,
606 MAD_UNITS_47_952_FPS = -48,
607 MAD_UNITS_49_95_FPS = -50,
608 MAD_UNITS_59_94_FPS = -60
609};
610
611# define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
612
613int mad_timer_compare(mad_timer_t, mad_timer_t);
614
615# define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
616
617void mad_timer_negate(mad_timer_t *);
618mad_timer_t mad_timer_abs(mad_timer_t);
619
620void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
621void mad_timer_add(mad_timer_t *, mad_timer_t);
622void mad_timer_multiply(mad_timer_t *, signed long);
623
624signed long mad_timer_count(mad_timer_t, enum mad_units);
625unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
626void mad_timer_string(mad_timer_t, char *, char const *,
627 enum mad_units, enum mad_units, unsigned long);
628
629# endif
630
631/* Id: stream.h,v 1.15 2001/11/08 23:28:03 rob Exp */
632
633# ifndef LIBMAD_STREAM_H
634# define LIBMAD_STREAM_H
635
636# define MAD_BUFFER_GUARD 8
637# define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
638
639enum mad_error {
640 MAD_ERROR_NONE = 0x0000, /* no error */
641
642 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
643 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
644
645 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
646
647 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
648 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
649 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
650 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
651 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
652
653 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
654 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
655 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
656 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
657 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
658 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
659 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
660 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
661 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
662 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
663 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
664 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
665};
666
667# define MAD_RECOVERABLE(error) ((error) & 0xff00)
668
669struct mad_stream {
670 unsigned char const *buffer; /* input bitstream buffer */
671 unsigned char const *bufend; /* end of buffer */
672 unsigned long skiplen; /* bytes to skip before next frame */
673
674 int sync; /* stream sync found */
675 unsigned long freerate; /* free bitrate (fixed) */
676
677 unsigned char const *this_frame; /* start of current frame */
678 unsigned char const *next_frame; /* start of next frame */
679 struct mad_bitptr ptr; /* current processing bit pointer */
680
681 struct mad_bitptr anc_ptr; /* ancillary bits pointer */
682 unsigned int anc_bitlen; /* number of ancillary bits */
683
684 unsigned char (*main_data)[MAD_BUFFER_MDLEN];
685 /* Layer III main_data() */
686 unsigned int md_len; /* bytes in main_data */
687
688 int options; /* decoding options (see below) */
689 enum mad_error error; /* error code (see above) */
690};
691
692enum {
693 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
694 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
695# if 0 /* not yet implemented */
696 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
697 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
698 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
699# endif
700};
701
702void mad_stream_init(struct mad_stream *);
703void mad_stream_finish(struct mad_stream *);
704
705# define mad_stream_options(stream, opts) \
706 ((void) ((stream)->options = (opts)))
707
708void mad_stream_buffer(struct mad_stream *,
709 unsigned char const *, unsigned long);
710void mad_stream_skip(struct mad_stream *, unsigned long);
711
712int mad_stream_sync(struct mad_stream *);
713
714char const *mad_stream_errorstr(struct mad_stream const *);
715
716# endif
717
718/* Id: frame.h,v 1.16 2001/10/17 19:13:41 rob Exp */
719
720# ifndef LIBMAD_FRAME_H
721# define LIBMAD_FRAME_H
722
723enum mad_layer {
724 MAD_LAYER_I = 1, /* Layer I */
725 MAD_LAYER_II = 2, /* Layer II */
726 MAD_LAYER_III = 3 /* Layer III */
727};
728
729enum mad_mode {
730 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
731 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
732 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
733 MAD_MODE_STEREO = 3 /* normal LR stereo */
734};
735
736enum mad_emphasis {
737 MAD_EMPHASIS_NONE = 0, /* no emphasis */
738 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
739 MAD_EMPHASIS_CCITT_J_17 = 3 /* CCITT J.17 emphasis */
740};
741
742struct mad_header {
743 enum mad_layer layer; /* audio layer (1, 2, or 3) */
744 enum mad_mode mode; /* channel mode (see above) */
745 int mode_extension; /* additional mode info */
746 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
747
748 unsigned long bitrate; /* stream bitrate (bps) */
749 unsigned int samplerate; /* sampling frequency (Hz) */
750
751 unsigned short crc_check; /* frame CRC accumulator */
752 unsigned short crc_target; /* final target CRC checksum */
753
754 int flags; /* flags (see below) */
755 int private_bits; /* private bits (see below) */
756
757 mad_timer_t duration; /* audio playing time of frame */
758};
759
760struct mad_frame {
761 struct mad_header header; /* MPEG audio header */
762
763 int options; /* decoding options (from stream) */
764
765 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
766 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
767};
768
769# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
770# define MAD_NSBSAMPLES(header) \
771 ((header)->layer == MAD_LAYER_I ? 12 : \
772 (((header)->layer == MAD_LAYER_III && \
773 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
774
775enum {
776 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
777 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
778
779 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
780 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
781 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
782 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
783
784 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
785 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
786 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
787
788 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
789 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
790 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
791};
792
793enum {
794 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
795 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
796};
797
798void mad_header_init(struct mad_header *);
799
800# define mad_header_finish(header) /* nothing */
801
802int mad_header_decode(struct mad_header *, struct mad_stream *);
803
804void mad_frame_init(struct mad_frame *);
805void mad_frame_finish(struct mad_frame *);
806
807int mad_frame_decode(struct mad_frame *, struct mad_stream *);
808
809void mad_frame_mute(struct mad_frame *);
810
811# endif
812
813/* Id: synth.h,v 1.11 2001/11/08 23:28:03 rob Exp */
814
815# ifndef LIBMAD_SYNTH_H
816# define LIBMAD_SYNTH_H
817
818struct mad_pcm {
819 unsigned int samplerate; /* sampling frequency (Hz) */
820 unsigned short channels; /* number of channels */
821 unsigned short length; /* number of samples per channel */
822 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
823};
824
825struct mad_synth {
826 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
827 /* [ch][eo][peo][s][v] */
828
829 unsigned int phase; /* current processing phase */
830
831 struct mad_pcm pcm; /* PCM output */
832};
833
834/* single channel PCM selector */
835enum {
836 MAD_PCM_CHANNEL_SINGLE = 0
837};
838
839/* dual channel PCM selector */
840enum {
841 MAD_PCM_CHANNEL_DUAL_1 = 0,
842 MAD_PCM_CHANNEL_DUAL_2 = 1
843};
844
845/* stereo PCM selector */
846enum {
847 MAD_PCM_CHANNEL_STEREO_LEFT = 0,
848 MAD_PCM_CHANNEL_STEREO_RIGHT = 1
849};
850
851void mad_synth_init(struct mad_synth *);
852
853# define mad_synth_finish(synth) /* nothing */
854
855void mad_synth_mute(struct mad_synth *);
856
857void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
858
859# endif
860
861/* Id: decoder.h,v 1.13 2001/11/03 03:57:11 rob Exp */
862
863# ifndef LIBMAD_DECODER_H
864# define LIBMAD_DECODER_H
865
866enum mad_decoder_mode {
867 MAD_DECODER_MODE_SYNC = 0,
868 MAD_DECODER_MODE_ASYNC
869};
870
871enum mad_flow {
872 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
873 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
874 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
875 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
876};
877
878struct mad_decoder {
879 enum mad_decoder_mode mode;
880
881 int options;
882
883 struct {
884 long pid;
885 int in;
886 int out;
887 } async;
888
889 struct {
890 struct mad_stream stream;
891 struct mad_frame frame;
892 struct mad_synth synth;
893 } *sync;
894
895 void *cb_data;
896
897 enum mad_flow (*input_func)(void *, struct mad_stream *);
898 enum mad_flow (*header_func)(void *, struct mad_header const *);
899 enum mad_flow (*filter_func)(void *,
900 struct mad_stream const *, struct mad_frame *);
901 enum mad_flow (*output_func)(void *,
902 struct mad_header const *, struct mad_pcm *);
903 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
904 enum mad_flow (*message_func)(void *, void *, unsigned int *);
905};
906
907void mad_decoder_init(struct mad_decoder *, void *,
908 enum mad_flow (*)(void *, struct mad_stream *),
909 enum mad_flow (*)(void *, struct mad_header const *),
910 enum mad_flow (*)(void *,
911 struct mad_stream const *,
912 struct mad_frame *),
913 enum mad_flow (*)(void *,
914 struct mad_header const *,
915 struct mad_pcm *),
916 enum mad_flow (*)(void *,
917 struct mad_stream *,
918 struct mad_frame *),
919 enum mad_flow (*)(void *, void *, unsigned int *));
920int mad_decoder_finish(struct mad_decoder *);
921
922# define mad_decoder_options(decoder, opts) \
923 ((void) ((decoder)->options = (opts)))
924
925int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
926int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
927
928# endif
929
930# ifdef __cplusplus
931}
932# endif
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