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* libmad - MPEG audio decoder library
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* Copyright (C) 2000-2004 Underbit Technologies, Inc.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* If you would like to negotiate alternate licensing terms, you may do
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* so by contacting: Underbit Technologies, Inc. <info@underbit.com>
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//# define FPM_DEFAULT
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# define SIZEOF_LONG 8
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# define SIZEOF_LONG_LONG 8
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typedef int32_t mad_fixed_t ;
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typedef int32_t mad_fixed64hi_t ;
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typedef uint32_t mad_fixed64lo_t ;
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/* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */
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# ifndef LIBMAD_VERSION_H
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# define LIBMAD_VERSION_H
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# define MAD_VERSION_MAJOR 0
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# define MAD_VERSION_MINOR 15
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# define MAD_VERSION_PATCH 1
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# define MAD_VERSION_EXTRA " (beta)"
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# define MAD_VERSION_STRINGIZE(str) #str
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# define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
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# define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
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MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
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MAD_VERSION_STRING(MAD_VERSION_PATCH) \
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# define MAD_PUBLISHYEAR "2000-2004"
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# define MAD_AUTHOR "Underbit Technologies, Inc."
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# define MAD_EMAIL "info@underbit.com"
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extern char const mad_version[];
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extern char const mad_copyright[];
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extern char const mad_author[];
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extern char const mad_build[];
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/* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */
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# ifndef LIBMAD_FIXED_H
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# define LIBMAD_FIXED_H
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typedef signed int mad_fixed_t;
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typedef signed int mad_fixed64hi_t;
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typedef unsigned int mad_fixed64lo_t;
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typedef signed long mad_fixed_t;
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typedef signed long mad_fixed64hi_t;
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typedef unsigned long mad_fixed64lo_t;
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# if defined(_MSC_VER)
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# define mad_fixed64_t signed __int64
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# elif 1 || defined(__GNUC__)
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# define mad_fixed64_t signed long long
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# if defined(FPM_FLOAT)
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typedef double mad_sample_t;
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typedef mad_fixed_t mad_sample_t;
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* Fixed-point format: 0xABBBBBBB
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* A == whole part (sign + 3 bits)
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* B == fractional part (28 bits)
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* Values are signed two's complement, so the effective range is:
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* 0x80000000 to 0x7fffffff
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* -8.0 to +7.9999999962747097015380859375
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* The smallest representable value is:
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* 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
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* 28 bits of fractional accuracy represent about
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* 8.6 digits of decimal accuracy.
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* Fixed-point numbers can be added or subtracted as normal
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* integers, but multiplication requires shifting the 64-bit result
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* from 56 fractional bits back to 28 (and rounding.)
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* Changing the definition of MAD_F_FRACBITS is only partially
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* supported, and must be done with care.
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# define MAD_F_FRACBITS 28
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# if MAD_F_FRACBITS == 28
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# define MAD_F(x) ((mad_fixed_t) (x##L))
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# if MAD_F_FRACBITS < 28
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# warning "MAD_F_FRACBITS < 28"
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# define MAD_F(x) ((mad_fixed_t) \
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(1L << (28 - MAD_F_FRACBITS - 1))) >> \
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(28 - MAD_F_FRACBITS)))
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# elif MAD_F_FRACBITS > 28
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# error "MAD_F_FRACBITS > 28 not currently supported"
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# define MAD_F(x) ((mad_fixed_t) \
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((x##L) << (MAD_F_FRACBITS - 28)))
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# define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
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# define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)
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# define MAD_F_ONE MAD_F(0x10000000)
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# define mad_f_tofixed(x) ((mad_fixed_t) \
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((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
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# define mad_f_todouble(x) ((double) \
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((x) / (double) (1L << MAD_F_FRACBITS)))
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# define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
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# define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
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/* (x should be positive) */
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# define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)
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# define mad_f_add(x, y) ((x) + (y))
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# define mad_f_sub(x, y) ((x) - (y))
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# if defined(FPM_FLOAT)
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# error "FPM_FLOAT not yet supported"
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# define MAD_F(x) mad_f_todouble(x)
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# define mad_f_mul(x, y) ((x) * (y))
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# define mad_f_scale64
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# undef ASO_ZEROCHECK
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# elif defined(FPM_64BIT)
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* This version should be the most accurate if 64-bit types are supported by
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* the compiler, although it may not be the most efficient.
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# if defined(OPT_ACCURACY)
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# define mad_f_mul(x, y) \
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((((mad_fixed64_t) (x) * (y)) + \
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(1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
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# define mad_f_mul(x, y) \
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((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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/* --- Intel --------------------------------------------------------------- */
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# elif defined(FPM_INTEL)
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# if defined(_MSC_VER)
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# pragma warning(push)
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# pragma warning(disable: 4035) /* no return value */
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mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
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fracbits = MAD_F_FRACBITS
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shrd eax, edx, fracbits
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/* implicit return of eax */
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# pragma warning(pop)
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# define mad_f_mul mad_f_mul_inline
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# define mad_f_scale64
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* This Intel version is fast and accurate; the disposition of the least
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* significant bit depends on OPT_ACCURACY via mad_f_scale64().
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# define MAD_F_MLX(hi, lo, x, y) \
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: "=a" (lo), "=d" (hi) \
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: "%a" (x), "rm" (y) \
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# if defined(OPT_ACCURACY)
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* This gives best accuracy but is not very fast.
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# define MAD_F_MLA(hi, lo, x, y) \
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({ mad_fixed64hi_t __hi; \
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mad_fixed64lo_t __lo; \
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MAD_F_MLX(__hi, __lo, (x), (y)); \
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asm ("addl %2,%0\n\t" \
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: "=rm" (lo), "=rm" (hi) \
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: "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
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# endif /* OPT_ACCURACY */
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# if defined(OPT_ACCURACY)
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* Surprisingly, this is faster than SHRD followed by ADC.
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed64hi_t __hi_; \
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mad_fixed64lo_t __lo_; \
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mad_fixed_t __result; \
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asm ("addl %4,%2\n\t" \
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: "=rm" (__lo_), "=rm" (__hi_) \
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: "0" (lo), "1" (hi), \
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"ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
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asm ("shrdl %3,%2,%1" \
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: "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
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# elif defined(OPT_INTEL)
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* Alternate Intel scaling that may or may not perform better.
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed_t __result; \
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asm ("shrl %3,%1\n\t" \
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: "0" (lo), "r" (hi), \
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"I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed_t __result; \
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asm ("shrdl %3,%2,%1" \
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: "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
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# endif /* OPT_ACCURACY */
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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/* --- ARM ----------------------------------------------------------------- */
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# elif defined(FPM_ARM)
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* This ARM V4 version is as accurate as FPM_64BIT but much faster. The
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* least significant bit is properly rounded at no CPU cycle cost!
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* This is faster than the default implementation via MAD_F_MLX() and
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# define mad_f_mul(x, y) \
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({ mad_fixed64hi_t __hi; \
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mad_fixed64lo_t __lo; \
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mad_fixed_t __result; \
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asm ("smull %0, %1, %3, %4\n\t" \
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"movs %0, %0, lsr %5\n\t" \
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"adc %2, %0, %1, lsl %6" \
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: "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
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: "%r" (x), "r" (y), \
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"M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
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# define MAD_F_MLX(hi, lo, x, y) \
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asm ("smull %0, %1, %2, %3" \
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: "=&r" (lo), "=&r" (hi) \
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# define MAD_F_MLA(hi, lo, x, y) \
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asm ("smlal %0, %1, %2, %3" \
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: "+r" (lo), "+r" (hi) \
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# define MAD_F_MLN(hi, lo) \
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asm ("rsbs %0, %2, #0\n\t" \
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: "=r" (lo), "=r" (hi) \
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: "0" (lo), "1" (hi) \
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed_t __result; \
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asm ("movs %0, %1, lsr %3\n\t" \
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"adc %0, %0, %2, lsl %4" \
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: "r" (lo), "r" (hi), \
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"M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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/* --- MIPS ---------------------------------------------------------------- */
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# elif defined(FPM_MIPS)
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* This MIPS version is fast and accurate; the disposition of the least
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* significant bit depends on OPT_ACCURACY via mad_f_scale64().
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# define MAD_F_MLX(hi, lo, x, y) \
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: "=l" (lo), "=h" (hi) \
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# if defined(HAVE_MADD_ASM)
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# define MAD_F_MLA(hi, lo, x, y) \
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: "+l" (lo), "+h" (hi) \
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# elif defined(HAVE_MADD16_ASM)
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* This loses significant accuracy due to the 16-bit integer limit in the
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* multiply/accumulate instruction.
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# define MAD_F_ML0(hi, lo, x, y) \
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: "=l" (lo), "=h" (hi) \
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: "%r" ((x) >> 12), "r" ((y) >> 16))
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# define MAD_F_MLA(hi, lo, x, y) \
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asm ("madd16 %2,%3" \
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: "+l" (lo), "+h" (hi) \
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: "%r" ((x) >> 12), "r" ((y) >> 16))
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# define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
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# if defined(OPT_SPEED)
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# define mad_f_scale64(hi, lo) \
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((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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/* --- SPARC --------------------------------------------------------------- */
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# elif defined(FPM_SPARC)
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* This SPARC V8 version is fast and accurate; the disposition of the least
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* significant bit depends on OPT_ACCURACY via mad_f_scale64().
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# define MAD_F_MLX(hi, lo, x, y) \
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asm ("smul %2, %3, %0\n\t" \
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: "=r" (lo), "=r" (hi) \
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: "%r" (x), "rI" (y))
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/* --- PowerPC ------------------------------------------------------------- */
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# elif defined(FPM_PPC)
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* This PowerPC version is fast and accurate; the disposition of the least
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* significant bit depends on OPT_ACCURACY via mad_f_scale64().
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# define MAD_F_MLX(hi, lo, x, y) \
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asm ("mullw %0,%1,%2" \
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: "%r" (x), "r" (y)); \
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asm ("mulhw %0,%1,%2" \
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: "%r" (x), "r" (y)); \
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# if defined(OPT_ACCURACY)
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* This gives best accuracy but is not very fast.
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# define MAD_F_MLA(hi, lo, x, y) \
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({ mad_fixed64hi_t __hi; \
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mad_fixed64lo_t __lo; \
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MAD_F_MLX(__hi, __lo, (x), (y)); \
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asm ("addc %0,%2,%3\n\t" \
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: "=r" (lo), "=r" (hi) \
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: "%r" (lo), "r" (__lo), \
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"%r" (hi), "r" (__hi) \
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# if defined(OPT_ACCURACY)
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* This is slower than the truncating version below it.
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed_t __result, __round; \
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asm ("rotrwi %0,%1,%2" \
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: "r" (lo), "i" (MAD_F_SCALEBITS)); \
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asm ("extrwi %0,%1,1,0" \
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asm ("insrwi %0,%1,%2,0" \
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: "r" (hi), "i" (MAD_F_SCALEBITS)); \
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asm ("add %0,%1,%2" \
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: "%r" (__result), "r" (__round)); \
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# define mad_f_scale64(hi, lo) \
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({ mad_fixed_t __result; \
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asm ("rotrwi %0,%1,%2" \
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: "r" (lo), "i" (MAD_F_SCALEBITS)); \
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asm ("insrwi %0,%1,%2,0" \
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: "r" (hi), "i" (MAD_F_SCALEBITS)); \
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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/* --- Default ------------------------------------------------------------- */
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# elif defined(FPM_DEFAULT)
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* This version is the most portable but it loses significant accuracy.
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* Furthermore, accuracy is biased against the second argument, so care
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* should be taken when ordering operands.
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* The scale factors are constant as this is not used with SSO.
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* Pre-rounding is required to stay within the limits of compliance.
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# if defined(OPT_SPEED)
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# define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
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# define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
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(((y) + (1L << 15)) >> 16))
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/* ------------------------------------------------------------------------- */
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# error "no FPM selected"
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/* default implementations */
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# if !defined(mad_f_mul)
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# define mad_f_mul(x, y) \
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({ register mad_fixed64hi_t __hi; \
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register mad_fixed64lo_t __lo; \
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MAD_F_MLX(__hi, __lo, (x), (y)); \
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mad_f_scale64(__hi, __lo); \
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# if !defined(MAD_F_MLA)
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# define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
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# define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
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# define MAD_F_MLN(hi, lo) ((lo) = -(lo))
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# define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
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# if !defined(MAD_F_ML0)
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# define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
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# if !defined(MAD_F_MLN)
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# define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
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# if !defined(MAD_F_MLZ)
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# define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
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# if !defined(mad_f_scale64)
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# if defined(OPT_ACCURACY)
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# define mad_f_scale64(hi, lo) \
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(((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
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((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
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# define mad_f_scale64(hi, lo) \
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(((hi) << (32 - MAD_F_SCALEBITS)) | \
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((lo) >> MAD_F_SCALEBITS)))
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# define MAD_F_SCALEBITS MAD_F_FRACBITS
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mad_fixed_t mad_f_abs(mad_fixed_t);
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mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);
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/* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */
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# ifndef LIBMAD_BIT_H
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# define LIBMAD_BIT_H
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unsigned char const *byte;
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unsigned short cache;
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void mad_bit_init(struct mad_bitptr *, unsigned char const *);
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# define mad_bit_finish(bitptr) /* nothing */
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unsigned int mad_bit_length(struct mad_bitptr const *,
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struct mad_bitptr const *);
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# define mad_bit_bitsleft(bitptr) ((bitptr)->left)
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unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
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void mad_bit_skip(struct mad_bitptr *, unsigned int);
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unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
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void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
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unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
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/* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */
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# ifndef LIBMAD_TIMER_H
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# define LIBMAD_TIMER_H
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signed long seconds; /* whole seconds */
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unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
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extern mad_timer_t const mad_timer_zero;
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# define MAD_TIMER_RESOLUTION 352800000UL
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MAD_UNITS_HOURS = -2,
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MAD_UNITS_MINUTES = -1,
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MAD_UNITS_SECONDS = 0,
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MAD_UNITS_DECISECONDS = 10,
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MAD_UNITS_CENTISECONDS = 100,
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MAD_UNITS_MILLISECONDS = 1000,
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/* audio sample units */
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MAD_UNITS_8000_HZ = 8000,
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MAD_UNITS_11025_HZ = 11025,
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MAD_UNITS_12000_HZ = 12000,
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MAD_UNITS_16000_HZ = 16000,
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MAD_UNITS_22050_HZ = 22050,
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MAD_UNITS_24000_HZ = 24000,
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MAD_UNITS_32000_HZ = 32000,
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MAD_UNITS_44100_HZ = 44100,
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MAD_UNITS_48000_HZ = 48000,
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/* video frame/field units */
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MAD_UNITS_24_FPS = 24,
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MAD_UNITS_25_FPS = 25,
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MAD_UNITS_30_FPS = 30,
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MAD_UNITS_48_FPS = 48,
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MAD_UNITS_50_FPS = 50,
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MAD_UNITS_60_FPS = 60,
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/* CD audio frames */
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MAD_UNITS_75_FPS = 75,
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/* video drop-frame units */
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MAD_UNITS_23_976_FPS = -24,
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MAD_UNITS_24_975_FPS = -25,
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MAD_UNITS_29_97_FPS = -30,
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MAD_UNITS_47_952_FPS = -48,
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MAD_UNITS_49_95_FPS = -50,
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MAD_UNITS_59_94_FPS = -60
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# define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
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int mad_timer_compare(mad_timer_t, mad_timer_t);
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# define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
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void mad_timer_negate(mad_timer_t *);
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mad_timer_t mad_timer_abs(mad_timer_t);
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void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
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void mad_timer_add(mad_timer_t *, mad_timer_t);
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void mad_timer_multiply(mad_timer_t *, signed long);
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signed long mad_timer_count(mad_timer_t, enum mad_units);
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unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
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void mad_timer_string(mad_timer_t, char *, char const *,
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enum mad_units, enum mad_units, unsigned long);
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/* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */
664
# ifndef LIBMAD_STREAM_H
665
# define LIBMAD_STREAM_H
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# define MAD_BUFFER_GUARD 8
669
# define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
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MAD_ERROR_NONE = 0x0000, /* no error */
674
MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
675
MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
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MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
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MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
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MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
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MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
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MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
683
MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
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MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
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MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
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MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
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MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
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MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
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MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
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MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
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MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
693
MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
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MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
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MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
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MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
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MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
700
# define MAD_RECOVERABLE(error) ((error) & 0xff00)
703
unsigned char const *buffer; /* input bitstream buffer */
704
unsigned char const *bufend; /* end of buffer */
705
unsigned long skiplen; /* bytes to skip before next frame */
707
int sync; /* stream sync found */
708
unsigned long freerate; /* free bitrate (fixed) */
710
unsigned char const *this_frame; /* start of current frame */
711
unsigned char const *next_frame; /* start of next frame */
712
struct mad_bitptr ptr; /* current processing bit pointer */
714
struct mad_bitptr anc_ptr; /* ancillary bits pointer */
715
unsigned int anc_bitlen; /* number of ancillary bits */
717
unsigned char (*main_data)[MAD_BUFFER_MDLEN];
718
/* Layer III main_data() */
719
unsigned int md_len; /* bytes in main_data */
721
int options; /* decoding options (see below) */
722
enum mad_error error; /* error code (see above) */
726
MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
727
MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
728
# if 0 /* not yet implemented */
729
MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
730
MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
731
MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
735
void mad_stream_init(struct mad_stream *);
736
void mad_stream_finish(struct mad_stream *);
738
# define mad_stream_options(stream, opts) \
739
((void) ((stream)->options = (opts)))
741
void mad_stream_buffer(struct mad_stream *,
742
unsigned char const *, unsigned long);
743
void mad_stream_skip(struct mad_stream *, unsigned long);
745
int mad_stream_sync(struct mad_stream *);
747
char const *mad_stream_errorstr(struct mad_stream const *);
751
/* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */
753
# ifndef LIBMAD_FRAME_H
754
# define LIBMAD_FRAME_H
758
MAD_LAYER_I = 1, /* Layer I */
759
MAD_LAYER_II = 2, /* Layer II */
760
MAD_LAYER_III = 3 /* Layer III */
764
MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
765
MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
766
MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
767
MAD_MODE_STEREO = 3 /* normal LR stereo */
771
MAD_EMPHASIS_NONE = 0, /* no emphasis */
772
MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
773
MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
774
MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
778
enum mad_layer layer; /* audio layer (1, 2, or 3) */
779
enum mad_mode mode; /* channel mode (see above) */
780
int mode_extension; /* additional mode info */
781
enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
783
unsigned long bitrate; /* stream bitrate (bps) */
784
unsigned int samplerate; /* sampling frequency (Hz) */
786
unsigned short crc_check; /* frame CRC accumulator */
787
unsigned short crc_target; /* final target CRC checksum */
789
int flags; /* flags (see below) */
790
int private_bits; /* private bits (see below) */
792
mad_timer_t duration; /* audio playing time of frame */
796
struct mad_header header; /* MPEG audio header */
798
int options; /* decoding options (from stream) */
800
mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
801
mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
804
# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
805
# define MAD_NSBSAMPLES(header) \
806
((header)->layer == MAD_LAYER_I ? 12 : \
807
(((header)->layer == MAD_LAYER_III && \
808
((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
811
MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
812
MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
814
MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
815
MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
816
MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
817
MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
819
MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
820
MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
821
MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
823
MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
824
MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
825
MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
829
MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
830
MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
833
void mad_header_init(struct mad_header *);
835
# define mad_header_finish(header) /* nothing */
837
int mad_header_decode(struct mad_header *, struct mad_stream *);
839
void mad_frame_init(struct mad_frame *);
840
void mad_frame_finish(struct mad_frame *);
842
int mad_frame_decode(struct mad_frame *, struct mad_stream *);
844
void mad_frame_mute(struct mad_frame *);
848
/* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */
850
# ifndef LIBMAD_SYNTH_H
851
# define LIBMAD_SYNTH_H
855
unsigned int samplerate; /* sampling frequency (Hz) */
856
unsigned short channels; /* number of channels */
857
unsigned short length; /* number of samples per channel */
858
mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
862
mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
863
/* [ch][eo][peo][s][v] */
865
unsigned int phase; /* current processing phase */
867
struct mad_pcm pcm; /* PCM output */
870
/* single channel PCM selector */
872
MAD_PCM_CHANNEL_SINGLE = 0
875
/* dual channel PCM selector */
877
MAD_PCM_CHANNEL_DUAL_1 = 0,
878
MAD_PCM_CHANNEL_DUAL_2 = 1
881
/* stereo PCM selector */
883
MAD_PCM_CHANNEL_STEREO_LEFT = 0,
884
MAD_PCM_CHANNEL_STEREO_RIGHT = 1
887
void mad_synth_init(struct mad_synth *);
889
# define mad_synth_finish(synth) /* nothing */
891
void mad_synth_mute(struct mad_synth *);
893
void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
897
/* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */
899
# ifndef LIBMAD_DECODER_H
900
# define LIBMAD_DECODER_H
903
enum mad_decoder_mode {
904
MAD_DECODER_MODE_SYNC = 0,
905
MAD_DECODER_MODE_ASYNC
909
MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
910
MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
911
MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
912
MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
916
enum mad_decoder_mode mode;
927
struct mad_stream stream;
928
struct mad_frame frame;
929
struct mad_synth synth;
934
enum mad_flow (*input_func)(void *, struct mad_stream *);
935
enum mad_flow (*header_func)(void *, struct mad_header const *);
936
enum mad_flow (*filter_func)(void *,
937
struct mad_stream const *, struct mad_frame *);
938
enum mad_flow (*output_func)(void *,
939
struct mad_header const *, struct mad_pcm *);
940
enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
941
enum mad_flow (*message_func)(void *, void *, unsigned int *);
944
void mad_decoder_init(struct mad_decoder *, void *,
945
enum mad_flow (*)(void *, struct mad_stream *),
946
enum mad_flow (*)(void *, struct mad_header const *),
947
enum mad_flow (*)(void *,
948
struct mad_stream const *,
950
enum mad_flow (*)(void *,
951
struct mad_header const *,
953
enum mad_flow (*)(void *,
956
enum mad_flow (*)(void *, void *, unsigned int *));
957
int mad_decoder_finish(struct mad_decoder *);
959
# define mad_decoder_options(decoder, opts) \
960
((void) ((decoder)->options = (opts)))
962
int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
963
int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
added
removed
avidemux/ADM_libMad/mad.h
