streo mp3 player see: http://mbed.org/users/okini3939/notebook/I2S_AUDIO
Dependencies: FatFileSystemCpp I2SSlave TLV320 mbed
Fork of madplayer by
mad.h
00001 /* 00002 * libmad - MPEG audio decoder library 00003 * Copyright (C) 2000-2004 Underbit Technologies, Inc. 00004 * 00005 * This program is free software; you can redistribute it and/or modify 00006 * it under the terms of the GNU General Public License as published by 00007 * the Free Software Foundation; either version 2 of the License, or 00008 * (at your option) any later version. 00009 * 00010 * This program is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 * GNU General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU General Public License 00016 * along with this program; if not, write to the Free Software 00017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 * 00019 * If you would like to negotiate alternate licensing terms, you may do 00020 * so by contacting: Underbit Technologies, Inc. <info@underbit.com> 00021 */ 00022 00023 # ifdef __cplusplus 00024 extern "C" { 00025 # endif 00026 00027 # define FPM_INTEL 00028 00029 00030 00031 # define SIZEOF_INT 4 00032 # define SIZEOF_LONG 4 00033 # define SIZEOF_LONG_LONG 8 00034 00035 00036 /* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */ 00037 00038 # ifndef LIBMAD_VERSION_H 00039 # define LIBMAD_VERSION_H 00040 00041 # define MAD_VERSION_MAJOR 0 00042 # define MAD_VERSION_MINOR 15 00043 # define MAD_VERSION_PATCH 1 00044 # define MAD_VERSION_EXTRA " (beta)" 00045 00046 # define MAD_VERSION_STRINGIZE(str) #str 00047 # define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num) 00048 00049 # define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \ 00050 MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \ 00051 MAD_VERSION_STRING(MAD_VERSION_PATCH) \ 00052 MAD_VERSION_EXTRA 00053 00054 # define MAD_PUBLISHYEAR "2000-2004" 00055 # define MAD_AUTHOR "Underbit Technologies, Inc." 00056 # define MAD_EMAIL "info@underbit.com" 00057 00058 extern char const mad_version[]; 00059 extern char const mad_copyright[]; 00060 extern char const mad_author[]; 00061 extern char const mad_build[]; 00062 00063 # endif 00064 00065 /* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */ 00066 00067 # ifndef LIBMAD_FIXED_H 00068 # define LIBMAD_FIXED_H 00069 00070 # if SIZEOF_INT >= 4 00071 typedef signed int mad_fixed_t; 00072 00073 typedef signed int mad_fixed64hi_t; 00074 typedef unsigned int mad_fixed64lo_t; 00075 # else 00076 typedef signed long mad_fixed_t; 00077 00078 typedef signed long mad_fixed64hi_t; 00079 typedef unsigned long mad_fixed64lo_t; 00080 # endif 00081 00082 # if defined(_MSC_VER) 00083 # define mad_fixed64_t signed __int64 00084 # elif 1 || defined(__GNUC__) 00085 # define mad_fixed64_t signed long long 00086 # endif 00087 00088 # if defined(FPM_FLOAT) 00089 typedef double mad_sample_t; 00090 # else 00091 typedef mad_fixed_t mad_sample_t; 00092 # endif 00093 00094 /* 00095 * Fixed-point format: 0xABBBBBBB 00096 * A == whole part (sign + 3 bits) 00097 * B == fractional part (28 bits) 00098 * 00099 * Values are signed two's complement, so the effective range is: 00100 * 0x80000000 to 0x7fffffff 00101 * -8.0 to +7.9999999962747097015380859375 00102 * 00103 * The smallest representable value is: 00104 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9) 00105 * 00106 * 28 bits of fractional accuracy represent about 00107 * 8.6 digits of decimal accuracy. 00108 * 00109 * Fixed-point numbers can be added or subtracted as normal 00110 * integers, but multiplication requires shifting the 64-bit result 00111 * from 56 fractional bits back to 28 (and rounding.) 00112 * 00113 * Changing the definition of MAD_F_FRACBITS is only partially 00114 * supported, and must be done with care. 00115 */ 00116 00117 # define MAD_F_FRACBITS 28 00118 00119 # if MAD_F_FRACBITS == 28 00120 # define MAD_F(x) ((mad_fixed_t) (x##L)) 00121 # else 00122 # if MAD_F_FRACBITS < 28 00123 # warning "MAD_F_FRACBITS < 28" 00124 # define MAD_F(x) ((mad_fixed_t) \ 00125 (((x##L) + \ 00126 (1L << (28 - MAD_F_FRACBITS - 1))) >> \ 00127 (28 - MAD_F_FRACBITS))) 00128 # elif MAD_F_FRACBITS > 28 00129 # error "MAD_F_FRACBITS > 28 not currently supported" 00130 # define MAD_F(x) ((mad_fixed_t) \ 00131 ((x##L) << (MAD_F_FRACBITS - 28))) 00132 # endif 00133 # endif 00134 00135 # define MAD_F_MIN ((mad_fixed_t) -0x80000000L) 00136 # define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL) 00137 00138 # define MAD_F_ONE MAD_F(0x10000000) 00139 00140 # define mad_f_tofixed(x) ((mad_fixed_t) \ 00141 ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5)) 00142 # define mad_f_todouble(x) ((double) \ 00143 ((x) / (double) (1L << MAD_F_FRACBITS))) 00144 00145 # define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS) 00146 # define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1)) 00147 /* (x should be positive) */ 00148 00149 # define mad_f_fromint(x) ((x) << MAD_F_FRACBITS) 00150 00151 # define mad_f_add(x, y) ((x) + (y)) 00152 # define mad_f_sub(x, y) ((x) - (y)) 00153 00154 # if defined(FPM_FLOAT) 00155 # error "FPM_FLOAT not yet supported" 00156 00157 # undef MAD_F 00158 # define MAD_F(x) mad_f_todouble(x) 00159 00160 # define mad_f_mul(x, y) ((x) * (y)) 00161 # define mad_f_scale64 00162 00163 # undef ASO_ZEROCHECK 00164 00165 # elif defined(FPM_64BIT) 00166 00167 /* 00168 * This version should be the most accurate if 64-bit types are supported by 00169 * the compiler, although it may not be the most efficient. 00170 */ 00171 # if defined(OPT_ACCURACY) 00172 # define mad_f_mul(x, y) \ 00173 ((mad_fixed_t) \ 00174 ((((mad_fixed64_t) (x) * (y)) + \ 00175 (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS)) 00176 # else 00177 # define mad_f_mul(x, y) \ 00178 ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS)) 00179 # endif 00180 00181 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00182 00183 /* --- Intel --------------------------------------------------------------- */ 00184 00185 # elif defined(FPM_INTEL) 00186 00187 # if defined(_MSC_VER) 00188 # pragma warning(push) 00189 # pragma warning(disable: 4035) /* no return value */ 00190 static __forceinline 00191 mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y) 00192 { 00193 enum { 00194 fracbits = MAD_F_FRACBITS 00195 }; 00196 00197 __asm { 00198 mov eax, x 00199 imul y 00200 shrd eax, edx, fracbits 00201 } 00202 00203 /* implicit return of eax */ 00204 } 00205 # pragma warning(pop) 00206 00207 # define mad_f_mul mad_f_mul_inline 00208 # define mad_f_scale64 00209 # else 00210 /* 00211 * This Intel version is fast and accurate; the disposition of the least 00212 * significant bit depends on OPT_ACCURACY via mad_f_scale64(). 00213 */ 00214 # define MAD_F_MLX(hi, lo, x, y) \ 00215 asm ("imull %3" \ 00216 : "=a" (lo), "=d" (hi) \ 00217 : "%a" (x), "rm" (y) \ 00218 : "cc") 00219 00220 # if defined(OPT_ACCURACY) 00221 /* 00222 * This gives best accuracy but is not very fast. 00223 */ 00224 # define MAD_F_MLA(hi, lo, x, y) \ 00225 ({ mad_fixed64hi_t __hi; \ 00226 mad_fixed64lo_t __lo; \ 00227 MAD_F_MLX(__hi, __lo, (x), (y)); \ 00228 asm ("addl %2,%0\n\t" \ 00229 "adcl %3,%1" \ 00230 : "=rm" (lo), "=rm" (hi) \ 00231 : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \ 00232 : "cc"); \ 00233 }) 00234 # endif /* OPT_ACCURACY */ 00235 00236 # if defined(OPT_ACCURACY) 00237 /* 00238 * Surprisingly, this is faster than SHRD followed by ADC. 00239 */ 00240 # define mad_f_scale64(hi, lo) \ 00241 ({ mad_fixed64hi_t __hi_; \ 00242 mad_fixed64lo_t __lo_; \ 00243 mad_fixed_t __result; \ 00244 asm ("addl %4,%2\n\t" \ 00245 "adcl %5,%3" \ 00246 : "=rm" (__lo_), "=rm" (__hi_) \ 00247 : "0" (lo), "1" (hi), \ 00248 "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \ 00249 : "cc"); \ 00250 asm ("shrdl %3,%2,%1" \ 00251 : "=rm" (__result) \ 00252 : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \ 00253 : "cc"); \ 00254 __result; \ 00255 }) 00256 # elif defined(OPT_INTEL) 00257 /* 00258 * Alternate Intel scaling that may or may not perform better. 00259 */ 00260 # define mad_f_scale64(hi, lo) \ 00261 ({ mad_fixed_t __result; \ 00262 asm ("shrl %3,%1\n\t" \ 00263 "shll %4,%2\n\t" \ 00264 "orl %2,%1" \ 00265 : "=rm" (__result) \ 00266 : "0" (lo), "r" (hi), \ 00267 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \ 00268 : "cc"); \ 00269 __result; \ 00270 }) 00271 # else 00272 # define mad_f_scale64(hi, lo) \ 00273 ({ mad_fixed_t __result; \ 00274 asm ("shrdl %3,%2,%1" \ 00275 : "=rm" (__result) \ 00276 : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \ 00277 : "cc"); \ 00278 __result; \ 00279 }) 00280 # endif /* OPT_ACCURACY */ 00281 00282 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00283 # endif 00284 00285 /* --- ARM ----------------------------------------------------------------- */ 00286 00287 # elif defined(FPM_ARM) 00288 00289 /* 00290 * This ARM V4 version is as accurate as FPM_64BIT but much faster. The 00291 * least significant bit is properly rounded at no CPU cycle cost! 00292 */ 00293 # if 1 00294 /* 00295 * This is faster than the default implementation via MAD_F_MLX() and 00296 * mad_f_scale64(). 00297 */ 00298 # define mad_f_mul(x, y) \ 00299 ({ mad_fixed64hi_t __hi; \ 00300 mad_fixed64lo_t __lo; \ 00301 mad_fixed_t __result; \ 00302 asm ("smull %0, %1, %3, %4\n\t" \ 00303 "movs %0, %0, lsr %5\n\t" \ 00304 "adc %2, %0, %1, lsl %6" \ 00305 : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ 00306 : "%r" (x), "r" (y), \ 00307 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ 00308 : "cc"); \ 00309 __result; \ 00310 }) 00311 # endif 00312 00313 # define MAD_F_MLX(hi, lo, x, y) \ 00314 asm ("smull %0, %1, %2, %3" \ 00315 : "=&r" (lo), "=&r" (hi) \ 00316 : "%r" (x), "r" (y)) 00317 00318 # define MAD_F_MLA(hi, lo, x, y) \ 00319 asm ("smlal %0, %1, %2, %3" \ 00320 : "+r" (lo), "+r" (hi) \ 00321 : "%r" (x), "r" (y)) 00322 00323 # define MAD_F_MLN(hi, lo) \ 00324 asm ("rsbs %0, %2, #0\n\t" \ 00325 "rsc %1, %3, #0" \ 00326 : "=r" (lo), "=r" (hi) \ 00327 : "0" (lo), "1" (hi) \ 00328 : "cc") 00329 00330 # define mad_f_scale64(hi, lo) \ 00331 ({ mad_fixed_t __result; \ 00332 asm ("movs %0, %1, lsr %3\n\t" \ 00333 "adc %0, %0, %2, lsl %4" \ 00334 : "=&r" (__result) \ 00335 : "r" (lo), "r" (hi), \ 00336 "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ 00337 : "cc"); \ 00338 __result; \ 00339 }) 00340 00341 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00342 00343 /* --- MIPS ---------------------------------------------------------------- */ 00344 00345 # elif defined(FPM_MIPS) 00346 00347 /* 00348 * This MIPS version is fast and accurate; the disposition of the least 00349 * significant bit depends on OPT_ACCURACY via mad_f_scale64(). 00350 */ 00351 # define MAD_F_MLX(hi, lo, x, y) \ 00352 asm ("mult %2,%3" \ 00353 : "=l" (lo), "=h" (hi) \ 00354 : "%r" (x), "r" (y)) 00355 00356 # if defined(HAVE_MADD_ASM) 00357 # define MAD_F_MLA(hi, lo, x, y) \ 00358 asm ("madd %2,%3" \ 00359 : "+l" (lo), "+h" (hi) \ 00360 : "%r" (x), "r" (y)) 00361 # elif defined(HAVE_MADD16_ASM) 00362 /* 00363 * This loses significant accuracy due to the 16-bit integer limit in the 00364 * multiply/accumulate instruction. 00365 */ 00366 # define MAD_F_ML0(hi, lo, x, y) \ 00367 asm ("mult %2,%3" \ 00368 : "=l" (lo), "=h" (hi) \ 00369 : "%r" ((x) >> 12), "r" ((y) >> 16)) 00370 # define MAD_F_MLA(hi, lo, x, y) \ 00371 asm ("madd16 %2,%3" \ 00372 : "+l" (lo), "+h" (hi) \ 00373 : "%r" ((x) >> 12), "r" ((y) >> 16)) 00374 # define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo)) 00375 # endif 00376 00377 # if defined(OPT_SPEED) 00378 # define mad_f_scale64(hi, lo) \ 00379 ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS))) 00380 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00381 # endif 00382 00383 /* --- SPARC --------------------------------------------------------------- */ 00384 00385 # elif defined(FPM_SPARC) 00386 00387 /* 00388 * This SPARC V8 version is fast and accurate; the disposition of the least 00389 * significant bit depends on OPT_ACCURACY via mad_f_scale64(). 00390 */ 00391 # define MAD_F_MLX(hi, lo, x, y) \ 00392 asm ("smul %2, %3, %0\n\t" \ 00393 "rd %%y, %1" \ 00394 : "=r" (lo), "=r" (hi) \ 00395 : "%r" (x), "rI" (y)) 00396 00397 /* --- PowerPC ------------------------------------------------------------- */ 00398 00399 # elif defined(FPM_PPC) 00400 00401 /* 00402 * This PowerPC version is fast and accurate; the disposition of the least 00403 * significant bit depends on OPT_ACCURACY via mad_f_scale64(). 00404 */ 00405 # define MAD_F_MLX(hi, lo, x, y) \ 00406 do { \ 00407 asm ("mullw %0,%1,%2" \ 00408 : "=r" (lo) \ 00409 : "%r" (x), "r" (y)); \ 00410 asm ("mulhw %0,%1,%2" \ 00411 : "=r" (hi) \ 00412 : "%r" (x), "r" (y)); \ 00413 } \ 00414 while (0) 00415 00416 # if defined(OPT_ACCURACY) 00417 /* 00418 * This gives best accuracy but is not very fast. 00419 */ 00420 # define MAD_F_MLA(hi, lo, x, y) \ 00421 ({ mad_fixed64hi_t __hi; \ 00422 mad_fixed64lo_t __lo; \ 00423 MAD_F_MLX(__hi, __lo, (x), (y)); \ 00424 asm ("addc %0,%2,%3\n\t" \ 00425 "adde %1,%4,%5" \ 00426 : "=r" (lo), "=r" (hi) \ 00427 : "%r" (lo), "r" (__lo), \ 00428 "%r" (hi), "r" (__hi) \ 00429 : "xer"); \ 00430 }) 00431 # endif 00432 00433 # if defined(OPT_ACCURACY) 00434 /* 00435 * This is slower than the truncating version below it. 00436 */ 00437 # define mad_f_scale64(hi, lo) \ 00438 ({ mad_fixed_t __result, __round; \ 00439 asm ("rotrwi %0,%1,%2" \ 00440 : "=r" (__result) \ 00441 : "r" (lo), "i" (MAD_F_SCALEBITS)); \ 00442 asm ("extrwi %0,%1,1,0" \ 00443 : "=r" (__round) \ 00444 : "r" (__result)); \ 00445 asm ("insrwi %0,%1,%2,0" \ 00446 : "+r" (__result) \ 00447 : "r" (hi), "i" (MAD_F_SCALEBITS)); \ 00448 asm ("add %0,%1,%2" \ 00449 : "=r" (__result) \ 00450 : "%r" (__result), "r" (__round)); \ 00451 __result; \ 00452 }) 00453 # else 00454 # define mad_f_scale64(hi, lo) \ 00455 ({ mad_fixed_t __result; \ 00456 asm ("rotrwi %0,%1,%2" \ 00457 : "=r" (__result) \ 00458 : "r" (lo), "i" (MAD_F_SCALEBITS)); \ 00459 asm ("insrwi %0,%1,%2,0" \ 00460 : "+r" (__result) \ 00461 : "r" (hi), "i" (MAD_F_SCALEBITS)); \ 00462 __result; \ 00463 }) 00464 # endif 00465 00466 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00467 00468 /* --- Default ------------------------------------------------------------- */ 00469 00470 # elif defined(FPM_DEFAULT) 00471 00472 /* 00473 * This version is the most portable but it loses significant accuracy. 00474 * Furthermore, accuracy is biased against the second argument, so care 00475 * should be taken when ordering operands. 00476 * 00477 * The scale factors are constant as this is not used with SSO. 00478 * 00479 * Pre-rounding is required to stay within the limits of compliance. 00480 */ 00481 # if defined(OPT_SPEED) 00482 # define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16)) 00483 # else 00484 # define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \ 00485 (((y) + (1L << 15)) >> 16)) 00486 # endif 00487 00488 /* ------------------------------------------------------------------------- */ 00489 00490 # else 00491 # error "no FPM selected" 00492 # endif 00493 00494 /* default implementations */ 00495 00496 # if !defined(mad_f_mul) 00497 # define mad_f_mul(x, y) \ 00498 ({ register mad_fixed64hi_t __hi; \ 00499 register mad_fixed64lo_t __lo; \ 00500 MAD_F_MLX(__hi, __lo, (x), (y)); \ 00501 mad_f_scale64(__hi, __lo); \ 00502 }) 00503 # endif 00504 00505 # if !defined(MAD_F_MLA) 00506 # define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y))) 00507 # define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y))) 00508 # define MAD_F_MLN(hi, lo) ((lo) = -(lo)) 00509 # define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo)) 00510 # endif 00511 00512 # if !defined(MAD_F_ML0) 00513 # define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y)) 00514 # endif 00515 00516 # if !defined(MAD_F_MLN) 00517 # define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi)) 00518 # endif 00519 00520 # if !defined(MAD_F_MLZ) 00521 # define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo)) 00522 # endif 00523 00524 # if !defined(mad_f_scale64) 00525 # if defined(OPT_ACCURACY) 00526 # define mad_f_scale64(hi, lo) \ 00527 ((((mad_fixed_t) \ 00528 (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \ 00529 ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1) 00530 # else 00531 # define mad_f_scale64(hi, lo) \ 00532 ((mad_fixed_t) \ 00533 (((hi) << (32 - MAD_F_SCALEBITS)) | \ 00534 ((lo) >> MAD_F_SCALEBITS))) 00535 # endif 00536 # define MAD_F_SCALEBITS MAD_F_FRACBITS 00537 # endif 00538 00539 /* C routines */ 00540 00541 mad_fixed_t mad_f_abs(mad_fixed_t); 00542 mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t); 00543 00544 # endif 00545 00546 /* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */ 00547 00548 # ifndef LIBMAD_BIT_H 00549 # define LIBMAD_BIT_H 00550 00551 struct mad_bitptr { 00552 unsigned char const *byte; 00553 unsigned short cache; 00554 unsigned short left; 00555 }; 00556 00557 void mad_bit_init(struct mad_bitptr *, unsigned char const *); 00558 00559 # define mad_bit_finish(bitptr) /* nothing */ 00560 00561 unsigned int mad_bit_length(struct mad_bitptr const *, 00562 struct mad_bitptr const *); 00563 00564 # define mad_bit_bitsleft(bitptr) ((bitptr)->left) 00565 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *); 00566 00567 void mad_bit_skip(struct mad_bitptr *, unsigned int); 00568 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int); 00569 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long); 00570 00571 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short); 00572 00573 # endif 00574 00575 /* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */ 00576 00577 # ifndef LIBMAD_TIMER_H 00578 # define LIBMAD_TIMER_H 00579 00580 typedef struct { 00581 signed long seconds; /* whole seconds */ 00582 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */ 00583 } mad_timer_t; 00584 00585 extern mad_timer_t const mad_timer_zero; 00586 00587 # define MAD_TIMER_RESOLUTION 352800000UL 00588 00589 enum mad_units { 00590 MAD_UNITS_HOURS = -2, 00591 MAD_UNITS_MINUTES = -1, 00592 MAD_UNITS_SECONDS = 0, 00593 00594 /* metric units */ 00595 00596 MAD_UNITS_DECISECONDS = 10, 00597 MAD_UNITS_CENTISECONDS = 100, 00598 MAD_UNITS_MILLISECONDS = 1000, 00599 00600 /* audio sample units */ 00601 00602 MAD_UNITS_8000_HZ = 8000, 00603 MAD_UNITS_11025_HZ = 11025, 00604 MAD_UNITS_12000_HZ = 12000, 00605 00606 MAD_UNITS_16000_HZ = 16000, 00607 MAD_UNITS_22050_HZ = 22050, 00608 MAD_UNITS_24000_HZ = 24000, 00609 00610 MAD_UNITS_32000_HZ = 32000, 00611 MAD_UNITS_44100_HZ = 44100, 00612 MAD_UNITS_48000_HZ = 48000, 00613 00614 /* video frame/field units */ 00615 00616 MAD_UNITS_24_FPS = 24, 00617 MAD_UNITS_25_FPS = 25, 00618 MAD_UNITS_30_FPS = 30, 00619 MAD_UNITS_48_FPS = 48, 00620 MAD_UNITS_50_FPS = 50, 00621 MAD_UNITS_60_FPS = 60, 00622 00623 /* CD audio frames */ 00624 00625 MAD_UNITS_75_FPS = 75, 00626 00627 /* video drop-frame units */ 00628 00629 MAD_UNITS_23_976_FPS = -24, 00630 MAD_UNITS_24_975_FPS = -25, 00631 MAD_UNITS_29_97_FPS = -30, 00632 MAD_UNITS_47_952_FPS = -48, 00633 MAD_UNITS_49_95_FPS = -50, 00634 MAD_UNITS_59_94_FPS = -60 00635 }; 00636 00637 # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero)) 00638 00639 int mad_timer_compare(mad_timer_t, mad_timer_t); 00640 00641 # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero) 00642 00643 void mad_timer_negate(mad_timer_t *); 00644 mad_timer_t mad_timer_abs(mad_timer_t); 00645 00646 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long); 00647 void mad_timer_add(mad_timer_t *, mad_timer_t); 00648 void mad_timer_multiply(mad_timer_t *, signed long); 00649 00650 signed long mad_timer_count(mad_timer_t, enum mad_units); 00651 unsigned long mad_timer_fraction(mad_timer_t, unsigned long); 00652 void mad_timer_string(mad_timer_t, char *, char const *, 00653 enum mad_units, enum mad_units, unsigned long); 00654 00655 # endif 00656 00657 /* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */ 00658 00659 # ifndef LIBMAD_STREAM_H 00660 # define LIBMAD_STREAM_H 00661 00662 00663 # define MAD_BUFFER_GUARD 8 00664 # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD) 00665 00666 enum mad_error { 00667 MAD_ERROR_NONE = 0x0000, /* no error */ 00668 00669 MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */ 00670 MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */ 00671 00672 MAD_ERROR_NOMEM = 0x0031, /* not enough memory */ 00673 00674 MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */ 00675 MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */ 00676 MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */ 00677 MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */ 00678 MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */ 00679 00680 MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */ 00681 MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */ 00682 MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */ 00683 MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */ 00684 MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */ 00685 MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */ 00686 MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */ 00687 MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */ 00688 MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */ 00689 MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */ 00690 MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */ 00691 MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */ 00692 MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */ 00693 }; 00694 00695 # define MAD_RECOVERABLE(error) ((error) & 0xff00) 00696 00697 struct mad_stream { 00698 unsigned char const *buffer; /* input bitstream buffer */ 00699 unsigned char const *bufend; /* end of buffer */ 00700 unsigned long skiplen; /* bytes to skip before next frame */ 00701 00702 int sync; /* stream sync found */ 00703 unsigned long freerate; /* free bitrate (fixed) */ 00704 00705 unsigned char const *this_frame; /* start of current frame */ 00706 unsigned char const *next_frame; /* start of next frame */ 00707 struct mad_bitptr ptr; /* current processing bit pointer */ 00708 00709 struct mad_bitptr anc_ptr; /* ancillary bits pointer */ 00710 unsigned int anc_bitlen; /* number of ancillary bits */ 00711 00712 unsigned char (*main_data)[MAD_BUFFER_MDLEN]; 00713 /* Layer III main_data() */ 00714 unsigned int md_len; /* bytes in main_data */ 00715 00716 int options; /* decoding options (see below) */ 00717 enum mad_error error; /* error code (see above) */ 00718 }; 00719 00720 enum { 00721 MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */ 00722 MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */ 00723 # if 0 /* not yet implemented */ 00724 MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */ 00725 MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */ 00726 MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */ 00727 # endif 00728 }; 00729 00730 void mad_stream_init(struct mad_stream *); 00731 void mad_stream_finish(struct mad_stream *); 00732 00733 # define mad_stream_options(stream, opts) \ 00734 ((void) ((stream)->options = (opts))) 00735 00736 void mad_stream_buffer(struct mad_stream *, 00737 unsigned char const *, unsigned long); 00738 void mad_stream_skip(struct mad_stream *, unsigned long); 00739 00740 int mad_stream_sync(struct mad_stream *); 00741 00742 char const *mad_stream_errorstr(struct mad_stream const *); 00743 00744 # endif 00745 00746 /* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */ 00747 00748 # ifndef LIBMAD_FRAME_H 00749 # define LIBMAD_FRAME_H 00750 00751 00752 enum mad_layer { 00753 MAD_LAYER_I = 1, /* Layer I */ 00754 MAD_LAYER_II = 2, /* Layer II */ 00755 MAD_LAYER_III = 3 /* Layer III */ 00756 }; 00757 00758 enum mad_mode { 00759 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */ 00760 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */ 00761 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */ 00762 MAD_MODE_STEREO = 3 /* normal LR stereo */ 00763 }; 00764 00765 enum mad_emphasis { 00766 MAD_EMPHASIS_NONE = 0, /* no emphasis */ 00767 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */ 00768 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */ 00769 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */ 00770 }; 00771 00772 struct mad_header { 00773 enum mad_layer layer; /* audio layer (1, 2, or 3) */ 00774 enum mad_mode mode; /* channel mode (see above) */ 00775 int mode_extension; /* additional mode info */ 00776 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ 00777 00778 unsigned long bitrate; /* stream bitrate (bps) */ 00779 unsigned int samplerate; /* sampling frequency (Hz) */ 00780 00781 unsigned short crc_check; /* frame CRC accumulator */ 00782 unsigned short crc_target; /* final target CRC checksum */ 00783 00784 int flags; /* flags (see below) */ 00785 int private_bits; /* private bits (see below) */ 00786 00787 mad_timer_t duration; /* audio playing time of frame */ 00788 }; 00789 00790 struct mad_frame { 00791 struct mad_header header; /* MPEG audio header */ 00792 00793 int options; /* decoding options (from stream) */ 00794 00795 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */ 00796 mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */ 00797 }; 00798 00799 # define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1) 00800 # define MAD_NSBSAMPLES(header) \ 00801 ((header)->layer == MAD_LAYER_I ? 12 : \ 00802 (((header)->layer == MAD_LAYER_III && \ 00803 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36)) 00804 00805 enum { 00806 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */ 00807 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */ 00808 00809 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */ 00810 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */ 00811 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */ 00812 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */ 00813 00814 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */ 00815 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */ 00816 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */ 00817 00818 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */ 00819 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */ 00820 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */ 00821 }; 00822 00823 enum { 00824 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */ 00825 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */ 00826 }; 00827 00828 void mad_header_init(struct mad_header *); 00829 00830 # define mad_header_finish(header) /* nothing */ 00831 00832 int mad_header_decode(struct mad_header *, struct mad_stream *); 00833 00834 void mad_frame_init(struct mad_frame *); 00835 void mad_frame_finish(struct mad_frame *); 00836 00837 int mad_frame_decode(struct mad_frame *, struct mad_stream *); 00838 00839 void mad_frame_mute(struct mad_frame *); 00840 00841 # endif 00842 00843 /* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */ 00844 00845 # ifndef LIBMAD_SYNTH_H 00846 # define LIBMAD_SYNTH_H 00847 00848 00849 struct mad_pcm { 00850 unsigned int samplerate; /* sampling frequency (Hz) */ 00851 unsigned short channels; /* number of channels */ 00852 unsigned short length; /* number of samples per channel */ 00853 mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */ 00854 }; 00855 00856 struct mad_synth { 00857 mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */ 00858 /* [ch][eo][peo][s][v] */ 00859 00860 unsigned int phase; /* current processing phase */ 00861 00862 struct mad_pcm pcm; /* PCM output */ 00863 }; 00864 00865 /* single channel PCM selector */ 00866 enum { 00867 MAD_PCM_CHANNEL_SINGLE = 0 00868 }; 00869 00870 /* dual channel PCM selector */ 00871 enum { 00872 MAD_PCM_CHANNEL_DUAL_1 = 0, 00873 MAD_PCM_CHANNEL_DUAL_2 = 1 00874 }; 00875 00876 /* stereo PCM selector */ 00877 enum { 00878 MAD_PCM_CHANNEL_STEREO_LEFT = 0, 00879 MAD_PCM_CHANNEL_STEREO_RIGHT = 1 00880 }; 00881 00882 void mad_synth_init(struct mad_synth *); 00883 00884 # define mad_synth_finish(synth) /* nothing */ 00885 00886 void mad_synth_mute(struct mad_synth *); 00887 00888 void mad_synth_frame(struct mad_synth *, struct mad_frame const *); 00889 00890 # endif 00891 00892 /* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */ 00893 00894 # ifndef LIBMAD_DECODER_H 00895 # define LIBMAD_DECODER_H 00896 00897 00898 enum mad_decoder_mode { 00899 MAD_DECODER_MODE_SYNC = 0, 00900 MAD_DECODER_MODE_ASYNC 00901 }; 00902 00903 enum mad_flow { 00904 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */ 00905 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */ 00906 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */ 00907 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */ 00908 }; 00909 00910 struct mad_sync_s { 00911 struct mad_stream stream; 00912 struct mad_frame frame; 00913 struct mad_synth *synth; 00914 }; 00915 00916 struct mad_decoder { 00917 enum mad_decoder_mode mode; 00918 00919 int options; 00920 00921 struct { 00922 long pid; 00923 int in; 00924 int out; 00925 } async; 00926 00927 struct mad_sync_s *sync; 00928 00929 void *cb_data; 00930 00931 enum mad_flow (*input_func)(void *, struct mad_stream *); 00932 enum mad_flow (*header_func)(void *, struct mad_header const *); 00933 enum mad_flow (*filter_func)(void *, 00934 struct mad_stream const *, struct mad_frame *); 00935 enum mad_flow (*output_func)(void *, 00936 struct mad_header const *, struct mad_pcm *); 00937 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *); 00938 enum mad_flow (*message_func)(void *, void *, unsigned int *); 00939 }; 00940 00941 void mad_decoder_init(struct mad_decoder *, void *, 00942 enum mad_flow (*)(void *, struct mad_stream *), 00943 enum mad_flow (*)(void *, struct mad_header const *), 00944 enum mad_flow (*)(void *, 00945 struct mad_stream const *, 00946 struct mad_frame *), 00947 enum mad_flow (*)(void *, 00948 struct mad_header const *, 00949 struct mad_pcm *), 00950 enum mad_flow (*)(void *, 00951 struct mad_stream *, 00952 struct mad_frame *), 00953 enum mad_flow (*)(void *, void *, unsigned int *)); 00954 int mad_decoder_finish(struct mad_decoder *); 00955 00956 # define mad_decoder_options(decoder, opts) \ 00957 ((void) ((decoder)->options = (opts))) 00958 00959 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode); 00960 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *); 00961 00962 # endif 00963 00964 # ifdef __cplusplus 00965 } 00966 # endif
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