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first working decoding frame

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Blue 2018-12-27 18:29:06 +03:00 committed by Yuriy Gubich
parent 54895768d5
commit 16c6a65b54
7 changed files with 1259 additions and 0 deletions
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CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.0)
function(em_file name)
execute_process(COMMAND
emcc --bind
${CMAKE_SOURCE_DIR}/libmad.bc
${CMAKE_SOURCE_DIR}/${name}.cpp
-o ${CMAKE_BINARY_DIR}/${name}.js
-s WASM=0
)
endfunction(em_file)
configure_file(index.html index.html)
em_file(wrapper)

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README.md Normal file
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index.html Normal file
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<!doctype html>
<html>
<head>
</head>
<body>
<script>
var Module = {
onRuntimeInitialized: function() {
}
};
</script>
<script src="wrapper.js"></script>
<input type="file" id="file" name="file" />
<script>
function onChange(e) {
var file = e.target.files[0];
var reader = new FileReader();
reader.onload = function(e) {
var buffer = reader.result;
var src = new Uint8Array(buffer);
var ptr = Module._malloc(buffer.byteLength);
var arr = new Uint8Array(Module.HEAPU8.buffer, ptr, buffer.byteLength);
arr.set(src, 0);
var stream = new Module.MadStream();
var frame = new Module.MadFrame();
stream.setBuffer(ptr, buffer.byteLength);
frame.decode(stream);
debugger;
}
reader.readAsArrayBuffer(file);
}
document.getElementById("file").addEventListener("change", onChange, false);
</script>
</body>
</html>

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libmad.bc Normal file
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/*
* 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_64BIT
# define SIZEOF_INT 4
# define SIZEOF_LONG 4
# define SIZEOF_LONG_LONG 8
/* Id: version.h,v 1.26 2004/01/23 09:41:33 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 "2000-2004"
# 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 1.38 2004/02/17 02:02:03 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; \
})
# elif defined(OPT_INTEL)
/*
* Alternate Intel scaling that may or may not perform better.
*/
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result; \
asm ("shrl %3,%1\n\t" \
"shll %4,%2\n\t" \
"orl %2,%1" \
: "=rm" (__result) \
: "0" (lo), "r" (hi), \
"I" (MAD_F_SCALEBITS), "I" (32 - 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 1.12 2004/01/23 09:41:32 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 1.16 2004/01/23 09:41:33 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 1.20 2004/02/05 09:02:39 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_BADMODE = 0x0222, /* bad bitrate/mode combination */
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 1.20 2004/01/23 09:41:32 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 1.15 2004/01/23 09:41:33 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 1.17 2004/01/23 09:41:32 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

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#include "wrapper.h"
MadHeader * mad_header_create()
{
MadHeader* header = new MadHeader;
mad_header_init(header);
return header;
}
MadFrame * mad_frame_create()
{
MadFrame* frame = new MadFrame;
mad_frame_init(frame);
return frame;
}
emscripten::val MadFrame::getOverlap() const
{
unsigned char* ptr = (unsigned char(*))overlap;
return emscripten::val(typed_memory_view(sizeof *overlap, ptr));
}
emscripten::val MadFrame::getSbsample() const
{
unsigned char* ptr = (unsigned char(*))&sbsample;
return emscripten::val(typed_memory_view(sizeof sbsample, ptr));
}
MadStream* mad_stream_create() {
MadStream* stream = new MadStream;
mad_stream_init(stream);
return stream;
}
emscripten::val MadStream::mainData()
{
return emscripten::val(typed_memory_view(MAD_BUFFER_MDLEN, (unsigned char(*))main_data));
}
void MadStream::setBuffer(intptr_t bufferPtr, unsigned long length)
{
mad_stream_buffer(this, (const unsigned char(*))bufferPtr, length);
}
int MadFrame::decode(mad_stream* stream)
{
return mad_frame_decode(this, stream);
}

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#ifndef WRAPPER_H
#define WRAPPER_H
#include <emscripten/bind.h>
#include <emscripten/val.h>
#include "mad.h"
using namespace emscripten;
class MadHeader : public mad_header {
public:
mad_layer getLayer() const {return layer;}
void setLayer(mad_layer lay) {layer = lay;}
int getMode_extension() const {return mode_extension;}
void setMode_extension(int ext) {mode_extension = ext;}
mad_mode getMode() const {return mode;}
void setMode(mad_mode value) {mode = value;}
mad_emphasis getEmphasis() const {return emphasis;}
void setEmphasis(mad_emphasis value) {emphasis = value;}
long unsigned int getBitrate() const {return bitrate;}
void setBitrate(long unsigned int value) {bitrate = value;}
unsigned int getSamplerate() const {return samplerate;}
void setSamplerate(unsigned int value) {samplerate = value;}
short unsigned int getCrc_check() const {return crc_check;}
void setCrc_check(short unsigned int value) {crc_check = value;}
short unsigned int getCrc_target() const {return crc_target;}
void setCrc_target(unsigned long int value) {crc_target = value;}
int getFlags() const {return flags;}
void setFlags(int ext) {flags = ext;}
int getPrivate_bits() const {return private_bits;}
void setPrivate_bits(int ext) {private_bits = ext;}
mad_timer_t getDuration() const {return duration;}
void setDuration(mad_timer_t ext) {duration = ext;}
};
MadHeader* mad_header_create();
class MadFrame : public mad_frame {
public:
const MadHeader& getHeader() const {return static_cast<const MadHeader&>(header);}
void setHeader(const MadHeader& head) {header = head;}
int getOptions() const {return options;}
void setOptions(int lay) {options = lay;}
val getSbsample() const;
val getOverlap() const;
int decode(mad_stream* stream);
};
MadFrame* mad_frame_create();
class MadStream : public 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 */
//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 */
public:
int getSync() const {return sync;}
void setSync(int value) {sync = value;}
unsigned long getFreeRate() const {return freerate;}
void setFreeRate(unsigned long value) {freerate = value;}
int getOptions() const {return options;}
void setOptions(int value) {options = value;}
mad_error getError() const {return error;}
void setError(mad_error value) {error = value;}
val mainData();
unsigned int getMdLen() const {return md_len;}
void setMdLen(unsigned int value) {md_len = value;}
void setBuffer(intptr_t bufferPtr, unsigned long length);
};
MadStream* mad_stream_create();
EMSCRIPTEN_BINDINGS(jsmad) {
enum_<mad_layer>("mad_layer")
.value("MAD_LAYER_I", MAD_LAYER_I)
.value("MAD_LAYER_II", MAD_LAYER_II)
.value("MAD_LAYER_III", MAD_LAYER_III);
enum_<mad_mode>("mad_mode")
.value("MAD_MODE_DUAL_CHANNEL", MAD_MODE_DUAL_CHANNEL)
.value("MAD_MODE_JOINT_STEREO", MAD_MODE_JOINT_STEREO)
.value("MAD_MODE_SINGLE_CHANNEL", MAD_MODE_SINGLE_CHANNEL)
.value("MAD_MODE_STEREO", MAD_MODE_STEREO);
enum_<mad_emphasis>("mad_emphasis")
.value("MAD_EMPHASIS_50_15_US", MAD_EMPHASIS_50_15_US)
.value("MAD_EMPHASIS_CCITT_J_17", MAD_EMPHASIS_CCITT_J_17)
.value("MAD_EMPHASIS_NONE", MAD_EMPHASIS_NONE)
.value("MAD_EMPHASIS_RESERVED", MAD_EMPHASIS_RESERVED);
enum_<mad_error>("mad_error")
.value("MAD_ERROR_NONE", MAD_ERROR_NONE) /* no error */
.value("MAD_ERROR_BUFLEN", MAD_ERROR_BUFLEN) /* input buffer too small (or EOF) */
.value("MAD_ERROR_BUFPTR", MAD_ERROR_BUFPTR) /* invalid (null) buffer pointer */
.value("MAD_ERROR_NOMEM", MAD_ERROR_NOMEM) /* not enough memory */
.value("MAD_ERROR_LOSTSYNC", MAD_ERROR_LOSTSYNC) /* lost synchronization */
.value("MAD_ERROR_BADLAYER", MAD_ERROR_BADLAYER) /* reserved header layer value */
.value("MAD_ERROR_BADBITRATE", MAD_ERROR_BADBITRATE) /* forbidden bitrate value */
.value("MAD_ERROR_BADSAMPLERATE", MAD_ERROR_BADSAMPLERATE) /* reserved sample frequency value */
.value("MAD_ERROR_BADEMPHASIS", MAD_ERROR_BADEMPHASIS) /* reserved emphasis value */
.value("MAD_ERROR_BADCRC", MAD_ERROR_BADCRC) /* CRC check failed */
.value("MAD_ERROR_BADBITALLOC", MAD_ERROR_BADBITALLOC) /* forbidden bit allocation value */
.value("MAD_ERROR_BADSCALEFACTOR", MAD_ERROR_BADSCALEFACTOR)/* bad scalefactor index */
.value("MAD_ERROR_BADMODE", MAD_ERROR_BADMODE) /* bad bitrate/mode combination */
.value("MAD_ERROR_BADFRAMELEN", MAD_ERROR_BADFRAMELEN) /* bad frame length */
.value("MAD_ERROR_BADBIGVALUES", MAD_ERROR_BADBIGVALUES) /* bad big_values count */
.value("MAD_ERROR_BADBLOCKTYPE", MAD_ERROR_BADBLOCKTYPE) /* reserved block_type */
.value("MAD_ERROR_BADSCFSI", MAD_ERROR_BADSCFSI) /* bad scalefactor selection info */
.value("MAD_ERROR_BADDATAPTR", MAD_ERROR_BADDATAPTR) /* bad main_data_begin pointer */
.value("MAD_ERROR_BADPART3LEN", MAD_ERROR_BADPART3LEN) /* bad audio data length */
.value("MAD_ERROR_BADHUFFTABLE", MAD_ERROR_BADHUFFTABLE) /* bad Huffman table select */
.value("MAD_ERROR_BADHUFFDATA", MAD_ERROR_BADHUFFDATA) /* Huffman data overrun */
.value("MAD_ERROR_BADSTEREO", MAD_ERROR_BADSTEREO); /* incompatible block_type for JS */
class_<mad_header>("mad_header");
class_<MadHeader, base<mad_header>>("MadHeader")
.constructor(&mad_header_create, allow_raw_pointers())
.property("layer", &MadHeader::getLayer, &MadHeader::setLayer)
.property("mode_extension", &MadHeader::getMode_extension, &MadHeader::setMode_extension)
.property("mode", &MadHeader::getMode, &MadHeader::setMode)
.property("emphasis", &MadHeader::getEmphasis, &MadHeader::setEmphasis)
.property("bitrate", &MadHeader::getBitrate, &MadHeader::setBitrate)
.property("samplerate", &MadHeader::getSamplerate, &MadHeader::setSamplerate)
.property("crc_check", &MadHeader::getCrc_check, &MadHeader::setCrc_check)
.property("crc_target", &MadHeader::getCrc_target, &MadHeader::setCrc_target)
.property("flags", &MadHeader::getFlags, &MadHeader::setFlags)
.property("private_bits", &MadHeader::getPrivate_bits, &MadHeader::setPrivate_bits)
.property("duration", &MadHeader::getDuration, &MadHeader::setDuration);
function("mad_header_init", &mad_header_init, allow_raw_pointers());
class_<mad_frame>("mad_frame");
class_<MadFrame, base<mad_frame>>("MadFrame")
.constructor(&mad_frame_create, allow_raw_pointers())
.property("header", &MadFrame::getHeader, &MadFrame::setHeader)
.property("options", &MadFrame::getOptions, &MadFrame::setOptions)
.function("sbsample", &MadFrame::getSbsample)
.function("overlap", &MadFrame::getOverlap)
.function("decode", &MadFrame::decode, allow_raw_pointers());
value_object<mad_timer_t>("mad_timer_t")
.field("seconds", &mad_timer_t::seconds)
.field("fraction", &mad_timer_t::fraction);
function("mad_frame_init", &mad_frame_init, allow_raw_pointers());
function("mad_frame_finish", &mad_frame_finish, allow_raw_pointers());
class_<mad_bitptr>("mad_bitptr");
class_<mad_stream>("mad_stream");
class_<MadStream, base<mad_stream>>("MadStream")
.constructor(&mad_stream_create, allow_raw_pointers())
.property("sync", &MadStream::getSync, &MadStream::setSync)
.property("freerate", &MadStream::getFreeRate, &MadStream::setFreeRate)
.property("options", &MadStream::getOptions, &MadStream::setOptions)
.property("error", &MadStream::getError, &MadStream::setError)
.property("mdLen", &MadStream::getMdLen, &MadStream::setMdLen)
.function("mainData", &MadStream::mainData)
.function("setBuffer", &MadStream::setBuffer, allow_raw_pointers());
function("mad_stream_init", &mad_stream_init, allow_raw_pointers());
function("mad_stream_finish", &mad_stream_finish, allow_raw_pointers());
function("mad_stream_buffer", &mad_stream_buffer, allow_raw_pointers());
}
#endif // WRAPPER_H