206 lines
7.6 KiB
C
Executable File
206 lines
7.6 KiB
C
Executable File
/*
|
|
* 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 {
|
|
/* Assume len is a multiple of 16, and arrays are 32-byte aligned */
|
|
/* Results of multiplications are scaled down by 31 bit (and rounded) if not
|
|
* stated otherwise */
|
|
|
|
/**
|
|
* Overlap/add with window function.
|
|
* Result is scaled down by "bits" bits.
|
|
* 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);
|
|
|
|
/**
|
|
* Fixed-point multiplication that calculates the entry wise product of two
|
|
* vectors of integers and stores the result in a vector of integers.
|
|
*
|
|
* @param dst output vector
|
|
* constraints: 32-byte aligned
|
|
* @param src0 first input vector
|
|
* constraints: 32-byte aligned
|
|
* @param src1 second input vector
|
|
* constraints: 32-byte aligned
|
|
* @param len number of elements in the input
|
|
* constraints: multiple of 16
|
|
*/
|
|
void (*vector_fmul)(int *dst, const int *src0, const int *src1,
|
|
int len);
|
|
|
|
void (*vector_fmul_reverse)(int *dst, const int *src0, const int *src1, int len);
|
|
/**
|
|
* Calculate the entry wise product of two vectors of integers, add a third vector of
|
|
* integers and store the result in a vector of integers.
|
|
*
|
|
* @param dst output vector
|
|
* constraints: 32-byte aligned
|
|
* @param src0 first input vector
|
|
* constraints: 32-byte aligned
|
|
* @param src1 second input vector
|
|
* constraints: 32-byte aligned
|
|
* @param src2 third input vector
|
|
* constraints: 32-byte aligned
|
|
* @param len number of elements in the input
|
|
* constraints: multiple of 16
|
|
*/
|
|
void (*vector_fmul_add)(int *dst, const int *src0, const int *src1,
|
|
const int *src2, int len);
|
|
|
|
/**
|
|
* Calculate the scalar product of two vectors of integers.
|
|
*
|
|
* @param v1 first vector, 16-byte aligned
|
|
* @param v2 second vector, 16-byte aligned
|
|
* @param len length of vectors, multiple of 4
|
|
*
|
|
* @return sum of elementwise products
|
|
*/
|
|
int (*scalarproduct_fixed)(const int *v1, const int *v2, int len);
|
|
|
|
/**
|
|
* Calculate the sum and difference of two vectors of integers.
|
|
*
|
|
* @param v1 first input vector, sum output, 16-byte aligned
|
|
* @param v2 second input vector, difference output, 16-byte aligned
|
|
* @param len length of vectors, multiple of 4
|
|
*/
|
|
void (*butterflies_fixed)(int *av_restrict v1, int *av_restrict v2, 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);
|
|
|
|
void ff_fixed_dsp_init_x86(AVFixedDSPContext *fdsp);
|
|
|
|
/**
|
|
* 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 */
|