mirror of
https://github.com/xiph/opus.git
synced 2025-05-16 00:18:29 +00:00
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/* Copyright (c) 2007-2008 CSIRO
|
|
Copyright (c) 2007-2009 Xiph.Org Foundation
|
|
Written by Jean-Marc Valin */
|
|
/**
|
|
@file pitch.h
|
|
@brief Pitch analysis
|
|
*/
|
|
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- 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.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``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 COPYRIGHT OWNER
|
|
OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#ifndef PITCH_H
|
|
#define PITCH_H
|
|
|
|
#include "arch.h"
|
|
|
|
/* OPT: This is the kernel you really want to optimize. It gets used a lot
|
|
by the prefilter and by the PLC. */
|
|
static OPUS_INLINE void xcorr_kernel(const opus_val16 * x, const opus_val16 * y, opus_val32 sum[4], int len)
|
|
{
|
|
int j;
|
|
opus_val16 y_0, y_1, y_2, y_3;
|
|
celt_assert(len>=3);
|
|
y_3=0; /* gcc doesn't realize that y_3 can't be used uninitialized */
|
|
y_0=*y++;
|
|
y_1=*y++;
|
|
y_2=*y++;
|
|
for (j=0;j<len-3;j+=4)
|
|
{
|
|
opus_val16 tmp;
|
|
tmp = *x++;
|
|
y_3=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_0);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_1);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_2);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_3);
|
|
tmp=*x++;
|
|
y_0=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_1);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_2);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_3);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_0);
|
|
tmp=*x++;
|
|
y_1=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_2);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_3);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_0);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_1);
|
|
tmp=*x++;
|
|
y_2=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_3);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_0);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_1);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_2);
|
|
}
|
|
if (j++<len)
|
|
{
|
|
opus_val16 tmp = *x++;
|
|
y_3=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_0);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_1);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_2);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_3);
|
|
}
|
|
if (j++<len)
|
|
{
|
|
opus_val16 tmp=*x++;
|
|
y_0=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_1);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_2);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_3);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_0);
|
|
}
|
|
if (j<len)
|
|
{
|
|
opus_val16 tmp=*x++;
|
|
y_1=*y++;
|
|
sum[0] = MAC16_16(sum[0],tmp,y_2);
|
|
sum[1] = MAC16_16(sum[1],tmp,y_3);
|
|
sum[2] = MAC16_16(sum[2],tmp,y_0);
|
|
sum[3] = MAC16_16(sum[3],tmp,y_1);
|
|
}
|
|
}
|
|
|
|
/*We make sure a C version is always available for cases where the overhead of
|
|
vectorization and passing around an arch flag aren't worth it.*/
|
|
static OPUS_INLINE opus_val32 celt_inner_prod(const opus_val16 *x,
|
|
const opus_val16 *y, int N)
|
|
{
|
|
int i;
|
|
opus_val32 xy=0;
|
|
for (i=0;i<N;i++)
|
|
xy = MAC16_16(xy, x[i], y[i]);
|
|
return xy;
|
|
}
|
|
|
|
void celt_pitch_xcorr(const opus_val16 *_x, const opus_val16 *_y,
|
|
opus_val32 *xcorr, int len, int max_pitch);
|
|
|
|
#endif
|