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3827a86eac
AMR NB and WB decoders are optimized for MIPS architecture. Appropriate Makefiles are changed accordingly. Cnfigure script is changed in order to support optimizations. Optimizations are enabled by default when compiling is done for mips architecture. Appropriate cflags are automatically set. Support for several mips CPUs is added in configure script. New ffmpeg options are added for disabling optimizations. The FFMPEG option --disable-mipsfpu disables MIPS floating point optimizations. The FFMPEG option --disable-mips32r2 disables MIPS32R2 optimizations. The FFMPEG option --disable-mipsdspr1 disables MIPS DSP ASE R1 optimizations. The FFMPEG option --disable-mipsdspr2 disables MIPS DSP ASE R2 optimizations. Signed-off-by: Nedeljko Babic <nbabic@mips.com> Reviewed-by: Vitor Sessak <vitor1001@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
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* Various fixed-point math operations
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*
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* Copyright (c) 2008 Vladimir Voroshilov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_CELP_MATH_H
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#define AVCODEC_CELP_MATH_H
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#include <stdint.h>
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typedef struct CELPMContext {
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/**
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* Return the dot product.
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* @param a input data array
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* @param b input data array
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* @param length number of elements
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*
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* @return dot product = sum of elementwise products
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*/
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float (*dot_productf)(const float* a, const float* b, int length);
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}CELPMContext;
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/**
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* Initialize CELPMContext.
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*/
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void ff_celp_math_init(CELPMContext *c);
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void ff_celp_math_init_mips(CELPMContext *c);
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/**
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* fixed-point implementation of cosine in [0; PI) domain.
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* @param arg fixed-point cosine argument, 0 <= arg < 0x4000
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*
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* @return value of (1<<15) * cos(arg * PI / (1<<14)), -0x8000 <= result <= 0x7fff
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*/
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int16_t ff_cos(uint16_t arg);
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/**
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* fixed-point implementation of exp2(x) in [0; 1] domain.
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* @param power argument to exp2, 0 <= power <= 0x7fff
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*
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* @return value of (1<<20) * exp2(power / (1<<15))
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* 0x8000c <= result <= 0xfffea
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*/
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int ff_exp2(uint16_t power);
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/**
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* Calculate log2(x).
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* @param value function argument, 0 < value <= 7fff ffff
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*
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* @return value of (1<<15) * log2(value)
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*/
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int ff_log2(uint32_t value);
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/**
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* Shift value left or right depending on sign of offset parameter.
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* @param value value to shift
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* @param offset shift offset
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*
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* @return value << offset, if offset>=0; value >> -offset - otherwise
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*/
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static inline int bidir_sal(int value, int offset)
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{
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if(offset < 0) return value >> -offset;
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else return value << offset;
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}
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/**
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* returns the dot product of 2 int16_t vectors.
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* @param a input data array
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* @param b input data array
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* @param length number of elements
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*
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* @return dot product = sum of elementwise products
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*/
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int64_t ff_dot_product(const int16_t *a, const int16_t *b, int length);
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/**
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* Return the dot product.
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* @param a input data array
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* @param b input data array
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* @param length number of elements
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*
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* @return dot product = sum of elementwise products
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*/
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float ff_dot_productf(const float* a, const float* b, int length);
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#endif /* AVCODEC_CELP_MATH_H */
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