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+/*
+ * libmad - MPEG audio decoder library
+ * Copyright (C) 2000-2001 Robert Leslie
+ *
+ * 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 the author: Robert Leslie <rob@mars.org>
+ */
+
+# 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 1.20 2001/10/27 22:47:32 rob Exp */
+
+# ifndef LIBMAD_VERSION_H
+# define LIBMAD_VERSION_H
+
+# define MAD_VERSION_MAJOR 0
+# define MAD_VERSION_MINOR 14
+# define MAD_VERSION_PATCH 2
+# 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 "2000-2001"
+# define MAD_AUTHOR "Robert Leslie"
+# define MAD_EMAIL "rob@mars.org"
+
+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 1.30 2001/11/02 09:51:06 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
+/*
+ * There's a bug somewhere, possibly in the compiler, that sometimes makes
+ * this necessary instead of the default implementation via MAD_F_MLX and
+ * mad_f_scale64. It may be related to the use (or lack) of
+ * -finline-functions and/or -fstrength-reduce.
+ *
+ * This is also apparently faster than MAD_F_MLX/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 tuned for the 4xx embedded processors. It is
+ * effectively a tuned version of FPM_64BIT. It is a little faster and just
+ * as 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 ("mulhw %1, %2, %3\n\t" \
+ "mullw %0, %2, %3" \
+ : "=&r" (lo), "=&r" (hi) \
+ : "%r" (x), "r" (y))
+
+# 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), "0" (lo), "%r" (__hi), "1" (hi)); \
+ })
+
+# if defined(OPT_ACCURACY)
+/*
+ * This is accurate and ~2 - 2.5 times slower than the unrounded version.
+ *
+ * The __volatile__ improves the generated code by another 5% (fewer spills
+ * to memory); eventually they should be removed.
+ */
+# define mad_f_scale64(hi, lo) \
+ ({ mad_fixed_t __result; \
+ mad_fixed64hi_t __hi_; \
+ mad_fixed64lo_t __lo_; \
+ asm __volatile__ ("addc %0, %2, %4\n\t" \
+ "addze %1, %3" \
+ : "=r" (__lo_), "=r" (__hi_) \
+ : "r" (lo), "r" (hi), "r" (1 << (MAD_F_SCALEBITS - 1))); \
+ asm __volatile__ ("rlwinm %0, %2,32-%3,0,%3-1\n\t" \
+ "rlwimi %0, %1,32-%3,%3,31" \
+ : "=&r" (__result) \
+ : "r" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS)); \
+ __result; \
+ })
+# else
+# define mad_f_scale64(hi, lo) \
+ ({ mad_fixed_t __result; \
+ asm ("rlwinm %0, %2,32-%3,0,%3-1\n\t" \
+ "rlwimi %0, %1,32-%3,%3,31" \
+ : "=r" (__result) \
+ : "r" (lo), "r" (hi), "I" (MAD_F_SCALEBITS)); \
+ __result; \
+ })
+# endif /* OPT_ACCURACY */
+
+# 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) \
+ ({ mad_fixed64hi_t __hi; \
+ 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
+
+/* miscellaneous C routines */
+
+mad_fixed_t mad_f_abs(mad_fixed_t);
+
+# endif
+
+/* Id: bit.h,v 1.8 2001/10/17 19:14:47 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 1.12 2001/11/03 03:57:11 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 1.15 2001/11/08 23:28:03 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 1.16 2001/10/17 19:13:41 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 */
+};
+
+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 1.11 2001/11/08 23:28:03 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 1.13 2001/11/03 03:57:11 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