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Diffstat (limited to 'libmad/configured/mad.h')
| -rw-r--r-- | libmad/configured/mad.h | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/libmad/configured/mad.h b/libmad/configured/mad.h new file mode 100644 index 0000000..d483478 --- /dev/null +++ b/libmad/configured/mad.h @@ -0,0 +1,948 @@ +/* + * libmad - MPEG audio decoder library + * Copyright (C) 2000-2004 Underbit Technologies, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * If you would like to negotiate alternate licensing terms, you may do + * so by contacting: Underbit Technologies, Inc. <info@underbit.com> + */ + +# ifdef __cplusplus +extern "C" { +# endif + +# define FPM_INTEL + + + +# define SIZEOF_INT 4 +# define SIZEOF_LONG 4 +# define SIZEOF_LONG_LONG 8 + + +/* Id: version.h,v 1.24 2003/05/27 22:40:37 rob Exp */ + +# ifndef LIBMAD_VERSION_H +# define LIBMAD_VERSION_H + +# define MAD_VERSION_MAJOR 0 +# define MAD_VERSION_MINOR 15 +# define MAD_VERSION_PATCH 1 +# define MAD_VERSION_EXTRA " (beta)" + +# define MAD_VERSION_STRINGIZE(str) #str +# define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num) + +# define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \ + MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \ + MAD_VERSION_STRING(MAD_VERSION_PATCH) \ + MAD_VERSION_EXTRA + +# define MAD_PUBLISHYEAR "2000-2003" +# define MAD_AUTHOR "Underbit Technologies, Inc." +# define MAD_EMAIL "info@underbit.com" + +extern char const mad_version[]; +extern char const mad_copyright[]; +extern char const mad_author[]; +extern char const mad_build[]; + +# endif + +/* Id: fixed.h,v 1.36 2003/05/28 04:36:00 rob Exp */ + +# ifndef LIBMAD_FIXED_H +# define LIBMAD_FIXED_H + +# if SIZEOF_INT >= 4 +typedef signed int mad_fixed_t; + +typedef signed int mad_fixed64hi_t; +typedef unsigned int mad_fixed64lo_t; +# else +typedef signed long mad_fixed_t; + +typedef signed long mad_fixed64hi_t; +typedef unsigned long mad_fixed64lo_t; +# endif + +# if defined(_MSC_VER) +# define mad_fixed64_t signed __int64 +# elif 1 || defined(__GNUC__) +# define mad_fixed64_t signed long long +# endif + +# if defined(FPM_FLOAT) +typedef double mad_sample_t; +# else +typedef mad_fixed_t mad_sample_t; +# endif + +/* + * Fixed-point format: 0xABBBBBBB + * A == whole part (sign + 3 bits) + * B == fractional part (28 bits) + * + * Values are signed two's complement, so the effective range is: + * 0x80000000 to 0x7fffffff + * -8.0 to +7.9999999962747097015380859375 + * + * The smallest representable value is: + * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9) + * + * 28 bits of fractional accuracy represent about + * 8.6 digits of decimal accuracy. + * + * Fixed-point numbers can be added or subtracted as normal + * integers, but multiplication requires shifting the 64-bit result + * from 56 fractional bits back to 28 (and rounding.) + * + * Changing the definition of MAD_F_FRACBITS is only partially + * supported, and must be done with care. + */ + +# define MAD_F_FRACBITS 28 + +# if MAD_F_FRACBITS == 28 +# define MAD_F(x) ((mad_fixed_t) (x##L)) +# else +# if MAD_F_FRACBITS < 28 +# warning "MAD_F_FRACBITS < 28" +# define MAD_F(x) ((mad_fixed_t) \ + (((x##L) + \ + (1L << (28 - MAD_F_FRACBITS - 1))) >> \ + (28 - MAD_F_FRACBITS))) +# elif MAD_F_FRACBITS > 28 +# error "MAD_F_FRACBITS > 28 not currently supported" +# define MAD_F(x) ((mad_fixed_t) \ + ((x##L) << (MAD_F_FRACBITS - 28))) +# endif +# endif + +# define MAD_F_MIN ((mad_fixed_t) -0x80000000L) +# define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL) + +# define MAD_F_ONE MAD_F(0x10000000) + +# define mad_f_tofixed(x) ((mad_fixed_t) \ + ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5)) +# define mad_f_todouble(x) ((double) \ + ((x) / (double) (1L << MAD_F_FRACBITS))) + +# define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS) +# define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1)) + /* (x should be positive) */ + +# define mad_f_fromint(x) ((x) << MAD_F_FRACBITS) + +# define mad_f_add(x, y) ((x) + (y)) +# define mad_f_sub(x, y) ((x) - (y)) + +# if defined(FPM_FLOAT) +# error "FPM_FLOAT not yet supported" + +# undef MAD_F +# define MAD_F(x) mad_f_todouble(x) + +# define mad_f_mul(x, y) ((x) * (y)) +# define mad_f_scale64 + +# undef ASO_ZEROCHECK + +# elif defined(FPM_64BIT) + +/* + * This version should be the most accurate if 64-bit types are supported by + * the compiler, although it may not be the most efficient. + */ +# if defined(OPT_ACCURACY) +# define mad_f_mul(x, y) \ + ((mad_fixed_t) \ + ((((mad_fixed64_t) (x) * (y)) + \ + (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS)) +# else +# define mad_f_mul(x, y) \ + ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS)) +# endif + +# define MAD_F_SCALEBITS MAD_F_FRACBITS + +/* --- Intel --------------------------------------------------------------- */ + +# elif defined(FPM_INTEL) + +# if defined(_MSC_VER) +# pragma warning(push) +# pragma warning(disable: 4035) /* no return value */ +static __forceinline +mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y) +{ + enum { + fracbits = MAD_F_FRACBITS + }; + + __asm { + mov eax, x + imul y + shrd eax, edx, fracbits + } + + /* implicit return of eax */ +} +# pragma warning(pop) + +# define mad_f_mul mad_f_mul_inline +# define mad_f_scale64 +# else +/* + * This Intel version is fast and accurate; the disposition of the least + * significant bit depends on OPT_ACCURACY via mad_f_scale64(). + */ +# define MAD_F_MLX(hi, lo, x, y) \ + asm ("imull %3" \ + : "=a" (lo), "=d" (hi) \ + : "%a" (x), "rm" (y) \ + : "cc") + +# if defined(OPT_ACCURACY) +/* + * This gives best accuracy but is not very fast. + */ +# define MAD_F_MLA(hi, lo, x, y) \ + ({ mad_fixed64hi_t __hi; \ + mad_fixed64lo_t __lo; \ + MAD_F_MLX(__hi, __lo, (x), (y)); \ + asm ("addl %2,%0\n\t" \ + "adcl %3,%1" \ + : "=rm" (lo), "=rm" (hi) \ + : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \ + : "cc"); \ + }) +# endif /* OPT_ACCURACY */ + +# if defined(OPT_ACCURACY) +/* + * Surprisingly, this is faster than SHRD followed by ADC. + */ +# define mad_f_scale64(hi, lo) \ + ({ mad_fixed64hi_t __hi_; \ + mad_fixed64lo_t __lo_; \ + mad_fixed_t __result; \ + asm ("addl %4,%2\n\t" \ + "adcl %5,%3" \ + : "=rm" (__lo_), "=rm" (__hi_) \ + : "0" (lo), "1" (hi), \ + "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \ + : "cc"); \ + asm ("shrdl %3,%2,%1" \ + : "=rm" (__result) \ + : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \ + : "cc"); \ + __result; \ + }) +# else +# define mad_f_scale64(hi, lo) \ + ({ mad_fixed_t __result; \ + asm ("shrdl %3,%2,%1" \ + : "=rm" (__result) \ + : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \ + : "cc"); \ + __result; \ + }) +# endif /* OPT_ACCURACY */ + +# define MAD_F_SCALEBITS MAD_F_FRACBITS +# endif + +/* --- ARM ----------------------------------------------------------------- */ + +# elif defined(FPM_ARM) + +/* + * This ARM V4 version is as accurate as FPM_64BIT but much faster. The + * least significant bit is properly rounded at no CPU cycle cost! + */ +# if 1 +/* + * This is faster than the default implementation via MAD_F_MLX() and + * mad_f_scale64(). + */ +# define mad_f_mul(x, y) \ + ({ mad_fixed64hi_t __hi; \ + mad_fixed64lo_t __lo; \ + mad_fixed_t __result; \ + asm ("smull %0, %1, %3, %4\n\t" \ + "movs %0, %0, lsr %5\n\t" \ + "adc %2, %0, %1, lsl %6" \ + : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ + : "%r" (x), "r" (y), \ + "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ + : "cc"); \ + __result; \ + }) +# endif + +# define MAD_F_MLX(hi, lo, x, y) \ + asm ("smull %0, %1, %2, %3" \ + : "=&r" (lo), "=&r" (hi) \ + : "%r" (x), "r" (y)) + +# define MAD_F_MLA(hi, lo, x, y) \ + asm ("smlal %0, %1, %2, %3" \ + : "+r" (lo), "+r" (hi) \ + : "%r" (x), "r" (y)) + +# define MAD_F_MLN(hi, lo) \ + asm ("rsbs %0, %2, #0\n\t" \ + "rsc %1, %3, #0" \ + : "=r" (lo), "=r" (hi) \ + : "0" (lo), "1" (hi) \ + : "cc") + +# define mad_f_scale64(hi, lo) \ + ({ mad_fixed_t __result; \ + asm ("movs %0, %1, lsr %3\n\t" \ + "adc %0, %0, %2, lsl %4" \ + : "=&r" (__result) \ + : "r" (lo), "r" (hi), \ + "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ + : "cc"); \ + __result; \ + }) + +# define MAD_F_SCALEBITS MAD_F_FRACBITS + +/* --- MIPS ---------------------------------------------------------------- */ + +# elif defined(FPM_MIPS) + +/* + * This MIPS version is fast and accurate; the disposition of the least + * significant bit depends on OPT_ACCURACY via mad_f_scale64(). + */ +# define MAD_F_MLX(hi, lo, x, y) \ + asm ("mult %2,%3" \ + : "=l" (lo), "=h" (hi) \ + : "%r" (x), "r" (y)) + +# if defined(HAVE_MADD_ASM) +# define MAD_F_MLA(hi, lo, x, y) \ + asm ("madd %2,%3" \ + : "+l" (lo), "+h" (hi) \ + : "%r" (x), "r" (y)) +# elif defined(HAVE_MADD16_ASM) +/* + * This loses significant accuracy due to the 16-bit integer limit in the + * multiply/accumulate instruction. + */ +# define MAD_F_ML0(hi, lo, x, y) \ + asm ("mult %2,%3" \ + : "=l" (lo), "=h" (hi) \ + : "%r" ((x) >> 12), "r" ((y) >> 16)) +# define MAD_F_MLA(hi, lo, x, y) \ + asm ("madd16 %2,%3" \ + : "+l" (lo), "+h" (hi) \ + : "%r" ((x) >> 12), "r" ((y) >> 16)) +# define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo)) +# endif + +# if defined(OPT_SPEED) +# define mad_f_scale64(hi, lo) \ + ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS))) +# define MAD_F_SCALEBITS MAD_F_FRACBITS +# endif + +/* --- SPARC --------------------------------------------------------------- */ + +# elif defined(FPM_SPARC) + +/* + * This SPARC V8 version is fast and accurate; the disposition of the least + * significant bit depends on OPT_ACCURACY via mad_f_scale64(). + */ +# define MAD_F_MLX(hi, lo, x, y) \ + asm ("smul %2, %3, %0\n\t" \ + "rd %%y, %1" \ + : "=r" (lo), "=r" (hi) \ + : "%r" (x), "rI" (y)) + +/* --- PowerPC ------------------------------------------------------------- */ + +# elif defined(FPM_PPC) + +/* + * This PowerPC version is fast and accurate; the disposition of the least + * significant bit depends on OPT_ACCURACY via mad_f_scale64(). + */ +# define MAD_F_MLX(hi, lo, x, y) \ + do { \ + asm ("mullw %0,%1,%2" \ + : "=r" (lo) \ + : "%r" (x), "r" (y)); \ + asm ("mulhw %0,%1,%2" \ + : "=r" (hi) \ + : "%r" (x), "r" (y)); \ + } \ + while (0) + +# if defined(OPT_ACCURACY) +/* + * This gives best accuracy but is not very fast. + */ +# define MAD_F_MLA(hi, lo, x, y) \ + ({ mad_fixed64hi_t __hi; \ + mad_fixed64lo_t __lo; \ + MAD_F_MLX(__hi, __lo, (x), (y)); \ + asm ("addc %0,%2,%3\n\t" \ + "adde %1,%4,%5" \ + : "=r" (lo), "=r" (hi) \ + : "%r" (lo), "r" (__lo), \ + "%r" (hi), "r" (__hi) \ + : "xer"); \ + }) +# endif + +# if defined(OPT_ACCURACY) +/* + * This is slower than the truncating version below it. + */ +# define mad_f_scale64(hi, lo) \ + ({ mad_fixed_t __result, __round; \ + asm ("rotrwi %0,%1,%2" \ + : "=r" (__result) \ + : "r" (lo), "i" (MAD_F_SCALEBITS)); \ + asm ("extrwi %0,%1,1,0" \ + : "=r" (__round) \ + : "r" (__result)); \ + asm ("insrwi %0,%1,%2,0" \ + : "+r" (__result) \ + : "r" (hi), "i" (MAD_F_SCALEBITS)); \ + asm ("add %0,%1,%2" \ + : "=r" (__result) \ + : "%r" (__result), "r" (__round)); \ + __result; \ + }) +# else +# define mad_f_scale64(hi, lo) \ + ({ mad_fixed_t __result; \ + asm ("rotrwi %0,%1,%2" \ + : "=r" (__result) \ + : "r" (lo), "i" (MAD_F_SCALEBITS)); \ + asm ("insrwi %0,%1,%2,0" \ + : "+r" (__result) \ + : "r" (hi), "i" (MAD_F_SCALEBITS)); \ + __result; \ + }) +# endif + +# define MAD_F_SCALEBITS MAD_F_FRACBITS + +/* --- Default ------------------------------------------------------------- */ + +# elif defined(FPM_DEFAULT) + +/* + * This version is the most portable but it loses significant accuracy. + * Furthermore, accuracy is biased against the second argument, so care + * should be taken when ordering operands. + * + * The scale factors are constant as this is not used with SSO. + * + * Pre-rounding is required to stay within the limits of compliance. + */ +# if defined(OPT_SPEED) +# define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16)) +# else +# define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \ + (((y) + (1L << 15)) >> 16)) +# endif + +/* ------------------------------------------------------------------------- */ + +# else +# error "no FPM selected" +# endif + +/* default implementations */ + +# if !defined(mad_f_mul) +# define mad_f_mul(x, y) \ + ({ register mad_fixed64hi_t __hi; \ + register mad_fixed64lo_t __lo; \ + MAD_F_MLX(__hi, __lo, (x), (y)); \ + mad_f_scale64(__hi, __lo); \ + }) +# endif + +# if !defined(MAD_F_MLA) +# define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y))) +# define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y))) +# define MAD_F_MLN(hi, lo) ((lo) = -(lo)) +# define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo)) +# endif + +# if !defined(MAD_F_ML0) +# define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y)) +# endif + +# if !defined(MAD_F_MLN) +# define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi)) +# endif + +# if !defined(MAD_F_MLZ) +# define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo)) +# endif + +# if !defined(mad_f_scale64) +# if defined(OPT_ACCURACY) +# define mad_f_scale64(hi, lo) \ + ((((mad_fixed_t) \ + (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \ + ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1) +# else +# define mad_f_scale64(hi, lo) \ + ((mad_fixed_t) \ + (((hi) << (32 - MAD_F_SCALEBITS)) | \ + ((lo) >> MAD_F_SCALEBITS))) +# endif +# define MAD_F_SCALEBITS MAD_F_FRACBITS +# endif + +/* C routines */ + +mad_fixed_t mad_f_abs(mad_fixed_t); +mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t); + +# endif + +/* Id: bit.h,v 1.11 2003/05/27 22:40:36 rob Exp */ + +# ifndef LIBMAD_BIT_H +# define LIBMAD_BIT_H + +struct mad_bitptr { + unsigned char const *byte; + unsigned short cache; + unsigned short left; +}; + +void mad_bit_init(struct mad_bitptr *, unsigned char const *); + +# define mad_bit_finish(bitptr) /* nothing */ + +unsigned int mad_bit_length(struct mad_bitptr const *, + struct mad_bitptr const *); + +# define mad_bit_bitsleft(bitptr) ((bitptr)->left) +unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *); + +void mad_bit_skip(struct mad_bitptr *, unsigned int); +unsigned long mad_bit_read(struct mad_bitptr *, unsigned int); +void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long); + +unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short); + +# endif + +/* Id: timer.h,v 1.15 2003/05/27 22:40:37 rob Exp */ + +# ifndef LIBMAD_TIMER_H +# define LIBMAD_TIMER_H + +typedef struct { + signed long seconds; /* whole seconds */ + unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */ +} mad_timer_t; + +extern mad_timer_t const mad_timer_zero; + +# define MAD_TIMER_RESOLUTION 352800000UL + +enum mad_units { + MAD_UNITS_HOURS = -2, + MAD_UNITS_MINUTES = -1, + MAD_UNITS_SECONDS = 0, + + /* metric units */ + + MAD_UNITS_DECISECONDS = 10, + MAD_UNITS_CENTISECONDS = 100, + MAD_UNITS_MILLISECONDS = 1000, + + /* audio sample units */ + + MAD_UNITS_8000_HZ = 8000, + MAD_UNITS_11025_HZ = 11025, + MAD_UNITS_12000_HZ = 12000, + + MAD_UNITS_16000_HZ = 16000, + MAD_UNITS_22050_HZ = 22050, + MAD_UNITS_24000_HZ = 24000, + + MAD_UNITS_32000_HZ = 32000, + MAD_UNITS_44100_HZ = 44100, + MAD_UNITS_48000_HZ = 48000, + + /* video frame/field units */ + + MAD_UNITS_24_FPS = 24, + MAD_UNITS_25_FPS = 25, + MAD_UNITS_30_FPS = 30, + MAD_UNITS_48_FPS = 48, + MAD_UNITS_50_FPS = 50, + MAD_UNITS_60_FPS = 60, + + /* CD audio frames */ + + MAD_UNITS_75_FPS = 75, + + /* video drop-frame units */ + + MAD_UNITS_23_976_FPS = -24, + MAD_UNITS_24_975_FPS = -25, + MAD_UNITS_29_97_FPS = -30, + MAD_UNITS_47_952_FPS = -48, + MAD_UNITS_49_95_FPS = -50, + MAD_UNITS_59_94_FPS = -60 +}; + +# define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero)) + +int mad_timer_compare(mad_timer_t, mad_timer_t); + +# define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero) + +void mad_timer_negate(mad_timer_t *); +mad_timer_t mad_timer_abs(mad_timer_t); + +void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long); +void mad_timer_add(mad_timer_t *, mad_timer_t); +void mad_timer_multiply(mad_timer_t *, signed long); + +signed long mad_timer_count(mad_timer_t, enum mad_units); +unsigned long mad_timer_fraction(mad_timer_t, unsigned long); +void mad_timer_string(mad_timer_t, char *, char const *, + enum mad_units, enum mad_units, unsigned long); + +# endif + +/* Id: stream.h,v 1.18 2003/05/27 22:40:37 rob Exp */ + +# ifndef LIBMAD_STREAM_H +# define LIBMAD_STREAM_H + + +# define MAD_BUFFER_GUARD 8 +# define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD) + +enum mad_error { + MAD_ERROR_NONE = 0x0000, /* no error */ + + MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */ + MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */ + + MAD_ERROR_NOMEM = 0x0031, /* not enough memory */ + + MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */ + MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */ + MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */ + MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */ + MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */ + + MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */ + MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */ + MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */ + MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */ + MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */ + MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */ + MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */ + MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */ + MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */ + MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */ + MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */ + MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */ +}; + +# define MAD_RECOVERABLE(error) ((error) & 0xff00) + +struct mad_stream { + unsigned char const *buffer; /* input bitstream buffer */ + unsigned char const *bufend; /* end of buffer */ + unsigned long skiplen; /* bytes to skip before next frame */ + + int sync; /* stream sync found */ + unsigned long freerate; /* free bitrate (fixed) */ + + unsigned char const *this_frame; /* start of current frame */ + unsigned char const *next_frame; /* start of next frame */ + struct mad_bitptr ptr; /* current processing bit pointer */ + + struct mad_bitptr anc_ptr; /* ancillary bits pointer */ + unsigned int anc_bitlen; /* number of ancillary bits */ + + unsigned char (*main_data)[MAD_BUFFER_MDLEN]; + /* Layer III main_data() */ + unsigned int md_len; /* bytes in main_data */ + + int options; /* decoding options (see below) */ + enum mad_error error; /* error code (see above) */ +}; + +enum { + MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */ + MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */ +# if 0 /* not yet implemented */ + MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */ + MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */ + MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */ +# endif +}; + +void mad_stream_init(struct mad_stream *); +void mad_stream_finish(struct mad_stream *); + +# define mad_stream_options(stream, opts) \ + ((void) ((stream)->options = (opts))) + +void mad_stream_buffer(struct mad_stream *, + unsigned char const *, unsigned long); +void mad_stream_skip(struct mad_stream *, unsigned long); + +int mad_stream_sync(struct mad_stream *); + +char const *mad_stream_errorstr(struct mad_stream const *); + +# endif + +/* Id: frame.h,v 1.19 2003/05/27 22:40:36 rob Exp */ + +# ifndef LIBMAD_FRAME_H +# define LIBMAD_FRAME_H + + +enum mad_layer { + MAD_LAYER_I = 1, /* Layer I */ + MAD_LAYER_II = 2, /* Layer II */ + MAD_LAYER_III = 3 /* Layer III */ +}; + +enum mad_mode { + MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */ + MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */ + MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */ + MAD_MODE_STEREO = 3 /* normal LR stereo */ +}; + +enum mad_emphasis { + MAD_EMPHASIS_NONE = 0, /* no emphasis */ + MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */ + MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */ + MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */ +}; + +struct mad_header { + enum mad_layer layer; /* audio layer (1, 2, or 3) */ + enum mad_mode mode; /* channel mode (see above) */ + int mode_extension; /* additional mode info */ + enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ + + unsigned long bitrate; /* stream bitrate (bps) */ + unsigned int samplerate; /* sampling frequency (Hz) */ + + unsigned short crc_check; /* frame CRC accumulator */ + unsigned short crc_target; /* final target CRC checksum */ + + int flags; /* flags (see below) */ + int private_bits; /* private bits (see below) */ + + mad_timer_t duration; /* audio playing time of frame */ +}; + +struct mad_frame { + struct mad_header header; /* MPEG audio header */ + + int options; /* decoding options (from stream) */ + + mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */ + mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */ +}; + +# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1) +# define MAD_NSBSAMPLES(header) \ + ((header)->layer == MAD_LAYER_I ? 12 : \ + (((header)->layer == MAD_LAYER_III && \ + ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36)) + +enum { + MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */ + MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */ + + MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */ + MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */ + MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */ + MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */ + + MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */ + MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */ + MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */ + + MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */ + MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */ + MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */ +}; + +enum { + MAD_PRIVATE_HEADER = 0x0100, /* header private bit */ + MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */ +}; + +void mad_header_init(struct mad_header *); + +# define mad_header_finish(header) /* nothing */ + +int mad_header_decode(struct mad_header *, struct mad_stream *); + +void mad_frame_init(struct mad_frame *); +void mad_frame_finish(struct mad_frame *); + +int mad_frame_decode(struct mad_frame *, struct mad_stream *); + +void mad_frame_mute(struct mad_frame *); + +# endif + +/* Id: synth.h,v 1.14 2003/05/27 22:40:37 rob Exp */ + +# ifndef LIBMAD_SYNTH_H +# define LIBMAD_SYNTH_H + + +struct mad_pcm { + unsigned int samplerate; /* sampling frequency (Hz) */ + unsigned short channels; /* number of channels */ + unsigned short length; /* number of samples per channel */ + mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */ +}; + +struct mad_synth { + mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */ + /* [ch][eo][peo][s][v] */ + + unsigned int phase; /* current processing phase */ + + struct mad_pcm pcm; /* PCM output */ +}; + +/* single channel PCM selector */ +enum { + MAD_PCM_CHANNEL_SINGLE = 0 +}; + +/* dual channel PCM selector */ +enum { + MAD_PCM_CHANNEL_DUAL_1 = 0, + MAD_PCM_CHANNEL_DUAL_2 = 1 +}; + +/* stereo PCM selector */ +enum { + MAD_PCM_CHANNEL_STEREO_LEFT = 0, + MAD_PCM_CHANNEL_STEREO_RIGHT = 1 +}; + +void mad_synth_init(struct mad_synth *); + +# define mad_synth_finish(synth) /* nothing */ + +void mad_synth_mute(struct mad_synth *); + +void mad_synth_frame(struct mad_synth *, struct mad_frame const *); + +# endif + +/* Id: decoder.h,v 1.16 2003/05/27 22:40:36 rob Exp */ + +# ifndef LIBMAD_DECODER_H +# define LIBMAD_DECODER_H + + +enum mad_decoder_mode { + MAD_DECODER_MODE_SYNC = 0, + MAD_DECODER_MODE_ASYNC +}; + +enum mad_flow { + MAD_FLOW_CONTINUE = 0x0000, /* continue normally */ + MAD_FLOW_STOP = 0x0010, /* stop decoding normally */ + MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */ + MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */ +}; + +struct mad_decoder { + enum mad_decoder_mode mode; + + int options; + + struct { + long pid; + int in; + int out; + } async; + + struct { + struct mad_stream stream; + struct mad_frame frame; + struct mad_synth synth; + } *sync; + + void *cb_data; + + enum mad_flow (*input_func)(void *, struct mad_stream *); + enum mad_flow (*header_func)(void *, struct mad_header const *); + enum mad_flow (*filter_func)(void *, + struct mad_stream const *, struct mad_frame *); + enum mad_flow (*output_func)(void *, + struct mad_header const *, struct mad_pcm *); + enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *); + enum mad_flow (*message_func)(void *, void *, unsigned int *); +}; + +void mad_decoder_init(struct mad_decoder *, void *, + enum mad_flow (*)(void *, struct mad_stream *), + enum mad_flow (*)(void *, struct mad_header const *), + enum mad_flow (*)(void *, + struct mad_stream const *, + struct mad_frame *), + enum mad_flow (*)(void *, + struct mad_header const *, + struct mad_pcm *), + enum mad_flow (*)(void *, + struct mad_stream *, + struct mad_frame *), + enum mad_flow (*)(void *, void *, unsigned int *)); +int mad_decoder_finish(struct mad_decoder *); + +# define mad_decoder_options(decoder, opts) \ + ((void) ((decoder)->options = (opts))) + +int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode); +int mad_decoder_message(struct mad_decoder *, void *, unsigned int *); + +# endif + +# ifdef __cplusplus +} +# endif |