339 lines
9.4 KiB
C
339 lines
9.4 KiB
C
/*
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mpg123lib_intern: Common non-public stuff for libmpg123
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copyright 1995-2008 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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derived from the old mpg123.h
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*/
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#ifndef MPG123_H_INTERN
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#define MPG123_H_INTERN
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#define MPG123_RATES 9
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#define MPG123_ENCODINGS 12
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#include "config.h" /* Load this before _anything_ */
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#include "intsym.h" /* Prefixing of internal symbols that still are public in a static lib. */
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/* ABI conformance for other compilers.
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mpg123 needs 16byte-aligned stack for SSE and friends.
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gcc provides that, but others don't necessarily. */
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#ifdef ABI_ALIGN_FUN
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#ifndef attribute_align_arg
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#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__>1)
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# define attribute_align_arg __attribute__((force_align_arg_pointer))
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/* The gcc that can align the stack does not need the check... nor does it work with gcc 4.3+, anyway. */
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#else
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# define attribute_align_arg
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/* Other compilers get code to catch misaligned stack.
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Well, except Sun Studio, which accepts the aligned attribute but does not honor it. */
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#if !defined(__SUNPRO_C)
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# define NEED_ALIGNCHECK
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#endif
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#endif
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#endif
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#else
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#define attribute_align_arg
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/* We won't try the align check... */
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#endif
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/* export DLL symbols */
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#if defined(WIN32) && defined(DYNAMIC_BUILD)
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#define BUILD_MPG123_DLL
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#endif
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#include "compat.h"
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#include "mpg123.h"
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#define SKIP_JUNK 1
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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#ifndef M_SQRT2
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# define M_SQRT2 1.41421356237309504880
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#endif
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#ifdef SUNOS
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#define memmove(dst,src,size) bcopy(src,dst,size)
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#endif
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/* some stuff has to go back to mpg123.h */
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#ifdef REAL_IS_FLOAT
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# define real float
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# define REAL_SCANF "%f"
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# define REAL_PRINTF "%f"
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#elif defined(REAL_IS_LONG_DOUBLE)
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# define real long double
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# define REAL_SCANF "%Lf"
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# define REAL_PRINTF "%Lf"
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#elif defined(REAL_IS_FIXED)
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/* Disable some output formats for fixed point decoder... */
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# define real long
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/*
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for fixed-point decoders, use pre-calculated tables to avoid expensive floating-point maths
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undef this macro for run-time calculation
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*/
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#define PRECALC_TABLES
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# define REAL_RADIX 24
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# define REAL_FACTOR 16777216.0
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static inline long double_to_long_rounded(double x, double scalefac)
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{
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x *= scalefac;
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x += (x > 0) ? 0.5 : -0.5;
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return (long)x;
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}
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static inline long scale_rounded(long x, int shift)
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{
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x += (x >> 31);
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x >>= (shift - 1);
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x += (x & 1);
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return (x >> 1);
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}
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# ifdef __GNUC__
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# if defined(OPT_I386)
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/* for i386_nofpu decoder */
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# define REAL_MUL_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y); \
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__asm__ ( \
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"imull %1 \n\t" \
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"shrdl %2, %%edx, %0 \n\t" \
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: "+&a" (_x) \
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: "mr" (_y), "I" (radix) \
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: "%edx", "cc" \
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); \
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_x; \
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})
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# define REAL_MUL_SCALE_LAYER3_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y), _radix=(radix); \
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__asm__ ( \
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"imull %1 \n\t" \
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"shrdl %%cl, %%edx, %0 \n\t" \
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: "+&a" (_x) \
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: "mr" (_y), "c" (_radix) \
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: "%edx", "cc" \
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); \
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_x; \
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})
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# elif defined(OPT_PPC)
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/* for powerpc */
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# define REAL_MUL_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y), _mull, _mulh; \
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__asm__ ( \
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"mullw %0, %2, %3 \n\t" \
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"mulhw %1, %2, %3 \n\t" \
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"srwi %0, %0, %4 \n\t" \
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"rlwimi %0, %1, %5, 0, %6 \n\t" \
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: "=&r" (_mull), "=&r" (_mulh) \
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: "r" (_x), "r" (_y), "i" (radix), "i" (32-(radix)), "i" ((radix)-1) \
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); \
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_mull; \
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})
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# define REAL_MUL_SCALE_LAYER3_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y), _radix=(radix), _mull, _mulh, _radix2; \
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__asm__ ( \
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"mullw %0, %3, %4 \n\t" \
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"mulhw %1, %3, %4 \n\t" \
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"subfic %2, %5, 32 \n\t" \
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"srw %0, %0, %5 \n\t" \
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"slw %1, %1, %2 \n\t" \
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"or %0, %0, %1 \n\t" \
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: "=&r" (_mull), "=&r" (_mulh), "=&r" (_radix2) \
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: "r" (_x), "r" (_y), "r" (_radix) \
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: "cc" \
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); \
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_mull; \
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})
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# elif defined(OPT_ARM)
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/* for arm */
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# define REAL_MUL_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y), _mull, _mulh; \
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__asm__ ( \
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"smull %0, %1, %2, %3 \n\t" \
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"mov %0, %0, lsr %4 \n\t" \
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"orr %0, %0, %1, lsl %5 \n\t" \
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: "=&r" (_mull), "=&r" (_mulh) \
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: "r" (_x), "r" (_y), "M" (radix), "M" (32-(radix)) \
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); \
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_mull; \
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})
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# define REAL_MUL_SCALE_LAYER3_ASM(x, y, radix) \
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({ \
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long _x=(x), _y=(y), _radix=(radix), _mull, _mulh, _radix2; \
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__asm__ ( \
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"smull %0, %1, %3, %4 \n\t" \
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"mov %0, %0, lsr %5 \n\t" \
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"rsb %2, %5, #32 \n\t" \
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"mov %1, %1, lsl %2 \n\t" \
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"orr %0, %0, %1 \n\t" \
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: "=&r" (_mull), "=&r" (_mulh), "=&r" (_radix2) \
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: "r" (_x), "r" (_y), "r" (_radix) \
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); \
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_mull; \
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})
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# endif
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# endif
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/* I just changed the (int) to (long) there... seemed right. */
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# define DOUBLE_TO_REAL(x) (double_to_long_rounded(x, REAL_FACTOR))
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# define DOUBLE_TO_REAL_15(x) (double_to_long_rounded(x, 32768.0))
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# define DOUBLE_TO_REAL_POW43(x) (double_to_long_rounded(x, 8192.0))
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# define DOUBLE_TO_REAL_SCALE_LAYER12(x) (double_to_long_rounded(x, 1073741824.0))
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# define DOUBLE_TO_REAL_SCALE_LAYER3(x, y) (double_to_long_rounded(x, pow(2.0,gainpow2_scale[y])))
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# define REAL_TO_DOUBLE(x) ((double)(x) / REAL_FACTOR)
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# ifdef REAL_MUL_ASM
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# define REAL_MUL(x, y) REAL_MUL_ASM(x, y, REAL_RADIX)
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# define REAL_MUL_15(x, y) REAL_MUL_ASM(x, y, 15)
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# define REAL_MUL_SCALE_LAYER12(x, y) REAL_MUL_ASM(x, y, 15 + 30 - REAL_RADIX)
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# else
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# define REAL_MUL(x, y) (((long long)(x) * (long long)(y)) >> REAL_RADIX)
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# define REAL_MUL_15(x, y) (((long long)(x) * (long long)(y)) >> 15)
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# define REAL_MUL_SCALE_LAYER12(x, y) (((long long)(x) * (long long)(y)) >> (15 + 30 - REAL_RADIX))
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# endif
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# ifdef REAL_MUL_SCALE_LAYER3_ASM
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# define REAL_MUL_SCALE_LAYER3(x, y, z) REAL_MUL_SCALE_LAYER3_ASM(x, y, 13 + gainpow2_scale[z] - REAL_RADIX)
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# else
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# define REAL_MUL_SCALE_LAYER3(x, y, z) (((long long)(x) * (long long)(y)) >> (13 + gainpow2_scale[z] - REAL_RADIX))
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# endif
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# define REAL_SCALE_LAYER12(x) ((long)((x) >> (30 - REAL_RADIX)))
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# define REAL_SCALE_LAYER3(x, y) ((long)((x) >> (gainpow2_scale[y] - REAL_RADIX)))
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# ifdef ACCURATE_ROUNDING
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# define REAL_MUL_SYNTH(x, y) REAL_MUL(x, y)
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# define REAL_SCALE_DCT64(x) (x)
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# define REAL_SCALE_WINDOW(x) (x)
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# else
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# define REAL_MUL_SYNTH(x, y) ((x) * (y))
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# define REAL_SCALE_DCT64(x) ((x) >> 8)
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# define REAL_SCALE_WINDOW(x) scale_rounded(x, 16)
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# endif
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# define REAL_SCANF "%ld"
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# define REAL_PRINTF "%ld"
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#else
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# define real double
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# define REAL_SCANF "%lf"
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# define REAL_PRINTF "%f"
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#endif
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#ifndef REAL_IS_FIXED
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# if (defined SIZEOF_INT32_T) && (SIZEOF_INT32_T != 4)
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# error "Bad 32bit types!!!"
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# endif
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#endif
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#ifndef DOUBLE_TO_REAL
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# define DOUBLE_TO_REAL(x) (real)(x)
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#endif
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#ifndef DOUBLE_TO_REAL_15
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# define DOUBLE_TO_REAL_15(x) (real)(x)
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#endif
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#ifndef DOUBLE_TO_REAL_POW43
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# define DOUBLE_TO_REAL_POW43(x) (real)(x)
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#endif
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#ifndef DOUBLE_TO_REAL_SCALE_LAYER12
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# define DOUBLE_TO_REAL_SCALE_LAYER12(x) (real)(x)
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#endif
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#ifndef DOUBLE_TO_REAL_SCALE_LAYER3
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# define DOUBLE_TO_REAL_SCALE_LAYER3(x, y) (real)(x)
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#endif
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#ifndef REAL_TO_DOUBLE
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# define REAL_TO_DOUBLE(x) (x)
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#endif
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#ifndef REAL_MUL
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# define REAL_MUL(x, y) ((x) * (y))
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#endif
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#ifndef REAL_MUL_SYNTH
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# define REAL_MUL_SYNTH(x, y) ((x) * (y))
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#endif
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#ifndef REAL_MUL_15
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# define REAL_MUL_15(x, y) ((x) * (y))
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#endif
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#ifndef REAL_MUL_SCALE_LAYER12
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# define REAL_MUL_SCALE_LAYER12(x, y) ((x) * (y))
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#endif
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#ifndef REAL_MUL_SCALE_LAYER3
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# define REAL_MUL_SCALE_LAYER3(x, y, z) ((x) * (y))
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#endif
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#ifndef REAL_SCALE_LAYER12
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# define REAL_SCALE_LAYER12(x) (x)
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#endif
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#ifndef REAL_SCALE_LAYER3
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# define REAL_SCALE_LAYER3(x, y) (x)
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#endif
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#ifndef REAL_SCALE_DCT64
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# define REAL_SCALE_DCT64(x) (x)
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#endif
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/* used to be: AUDIOBUFSIZE = n*64 with n=1,2,3 ...
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now: factor on minimum frame buffer size (which takes upsampling into account) */
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#define AUDIOBUFSIZE 2
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#include "true.h"
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#define MAX_NAME_SIZE 81
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#define SBLIMIT 32
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#define SCALE_BLOCK 12
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#define SSLIMIT 18
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/* Same as MPG_M_* */
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#define MPG_MD_STEREO 0
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#define MPG_MD_JOINT_STEREO 1
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#define MPG_MD_DUAL_CHANNEL 2
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#define MPG_MD_MONO 3
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/* We support short or float output samples...
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Short integer amplitude is scaled by this. */
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#define SHORT_SCALE 32768
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/* That scales a short-scaled value to a 32bit integer scaled one
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value = 2**31/2**15 */
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#define S32_RESCALE 65536
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/* Pre Shift fo 16 to 8 bit converter table */
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#define AUSHIFT (3)
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#include "optimize.h"
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#include "decode.h"
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#include "parse.h"
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#include "frame.h"
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/* fr is a mpg123_handle* by convention here... */
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#define NOQUIET (!(fr->p.flags & MPG123_QUIET))
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#define VERBOSE (NOQUIET && fr->p.verbose)
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#define VERBOSE2 (NOQUIET && fr->p.verbose > 1)
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#define VERBOSE3 (NOQUIET && fr->p.verbose > 2)
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#define VERBOSE4 (NOQUIET && fr->p.verbose > 3)
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#define PVERB(mp, level) (!((mp)->flags & MPG123_QUIET) && (mp)->verbose >= (level))
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int decode_update(mpg123_handle *mh);
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/* residing in format.c */
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off_t samples_to_storage(mpg123_handle *fr , off_t s);
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off_t samples_to_bytes(mpg123_handle *fr , off_t s);
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off_t bytes_to_samples(mpg123_handle *fr , off_t b);
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/* Postprocessing format conversion of freshly decoded buffer. */
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void postprocess_buffer(mpg123_handle *fr);
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/* If networking is enabled and we really mean internal networking, the timeout_read function is available. */
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#if defined (NETWORK) && !defined (WANT_WIN32_SOCKETS)
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/* Does not work with win32 */
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#define TIMEOUT_READ
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#endif
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#endif
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