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libavutil: Add fixed_dsp

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Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/64/head
Nedeljko Babic 11 years ago committed by Michael Niedermayer
parent 254f653b24
commit 284cfc7180
4 changed files with 244 additions and 1 deletions
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  1. 1
      libavutil/Makefile
  2. 98
      libavutil/fixed_dsp.c
  3. 144
      libavutil/fixed_dsp.h
  4. 2
      libavutil/version.h

1
libavutil/Makefile
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@ -89,6 +89,7 @@ OBJS = adler32.o \
file.o \
file_open.o \
float_dsp.o \
fixed_dsp.o \
frame.o \
hash.o \
hmac.o \

98
libavutil/fixed_dsp.c
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@ -0,0 +1,98 @@
/*
* Copyright (c) 2012
* MIPS Technologies, Inc., California.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Nedeljko Babic (nbabic@mips.com)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "fixed_dsp.h"
static void vector_fmul_window_fixed_scaled_c(int16_t *dst, const int32_t *src0,
const int32_t *src1, const int32_t *win,
int len, uint8_t bits)
{
int32_t s0, s1, wi, wj, i,j, round;
dst += len;
win += len;
src0+= len;
round = bits? 1 << (bits-1) : 0;
for (i=-len, j=len-1; i<0; i++, j--) {
s0 = src0[i];
s1 = src1[j];
wi = win[i];
wj = win[j];
dst[i] = av_clip_int16_c(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits);
dst[j] = av_clip_int16_c(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits);
}
}
static void vector_fmul_window_fixed_c(int32_t *dst, const int32_t *src0,
const int32_t *src1, const int32_t *win,
int len)
{
int32_t s0, s1, wi, wj, i, j;
dst += len;
win += len;
src0+= len;
for (i=-len, j=len-1; i<0; i++, j--) {
s0 = src0[i];
s1 = src1[j];
wi = win[i];
wj = win[j];
dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31;
dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31;
}
}
AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact)
{
AVFixedDSPContext * fdsp = (AVFixedDSPContext*)av_malloc(sizeof(AVFixedDSPContext));
fdsp->vector_fmul_window_scaled = vector_fmul_window_fixed_scaled_c;
fdsp->vector_fmul_window = vector_fmul_window_fixed_c;
return fdsp;
}

144
libavutil/fixed_dsp.h
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@ -0,0 +1,144 @@
/*
* Copyright (c) 2012
* MIPS Technologies, Inc., California.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Nedeljko Babic (nbabic@mips.com)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_FIXED_DSP_H
#define AVUTIL_FIXED_DSP_H
#include <stdint.h>
#include "attributes.h"
#include "common.h"
#include "libavcodec/mathops.h"
typedef struct AVFixedDSPContext {
/**
* Overlap/add with window function.
* Used primarily by MDCT-based audio codecs.
* Source and destination vectors must overlap exactly or not at all.
*
* @param dst result vector
* constraints: 16-byte aligned
* @param src0 first source vector
* constraints: 16-byte aligned
* @param src1 second source vector
* constraints: 16-byte aligned
* @param win half-window vector
* constraints: 16-byte aligned
* @param len length of vector
* constraints: multiple of 4
* @param bits scaling parameter
*
*/
void (*vector_fmul_window_scaled)(int16_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len, uint8_t bits);
/**
* Overlap/add with window function.
* Used primarily by MDCT-based audio codecs.
* Source and destination vectors must overlap exactly or not at all.
*
* @param dst result vector
* constraints: 32-byte aligned
* @param src0 first source vector
* constraints: 16-byte aligned
* @param src1 second source vector
* constraints: 16-byte aligned
* @param win half-window vector
* constraints: 16-byte aligned
* @param len length of vector
* constraints: multiple of 4
*/
void (*vector_fmul_window)(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len);
} AVFixedDSPContext;
/**
* Allocate and initialize a fixed DSP context.
* note: should be freed with a av_free call when no longer needed.
*
* @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant
*/
AVFixedDSPContext * avpriv_alloc_fixed_dsp(int strict);
/**
* Calculate the square root
*
* @param x input fixed point number
*
* @param bits format of fixed point number (32 - bits).bits
*
* note: input is normalized to (0, 1) fixed point value
*/
static av_always_inline int fixed_sqrt(int x, int bits)
{
int retval, bit_mask, guess, square, i;
int64_t accu;
int shift1 = 30 - bits;
int shift2 = bits - 15;
if (shift1 > 0) retval = ff_sqrt(x << shift1);
else retval = ff_sqrt(x >> -shift1);
if (shift2 > 0) {
retval = retval << shift2;
bit_mask = (1 << (shift2 - 1));
for (i=0; i<shift2; i++){
guess = retval + bit_mask;
accu = (int64_t)guess * guess;
square = (int)((accu + bit_mask) >> bits);
if (x >= square)
retval += bit_mask;
bit_mask >>= 1;
}
}
else retval >>= (-shift2);
return retval;
}
#endif /* AVUTIL_FIXED_DSP_H */

2
libavutil/version.h
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@ -56,7 +56,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 70
#define LIBAVUTIL_VERSION_MINOR 71
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

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