mirror of
https://github.com/mpv-player/mpv
synced 2024-12-16 11:55:42 +00:00
5b38c5c251
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3494 b3059339-0415-0410-9bf9-f77b7e298cf2
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
|
|
* imdct_mlib.c
|
|
* Copyright (C) 2000-2001 Michel Lespinasse <walken@zoy.org>
|
|
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
|
|
*
|
|
* This file is part of a52dec, a free ATSC A-52 stream decoder.
|
|
* See http://liba52.sourceforge.net/ for updates.
|
|
*
|
|
* a52dec is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* a52dec 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef LIBA52_MLIB
|
|
|
|
#include <mlib_types.h>
|
|
#include <mlib_status.h>
|
|
#include <mlib_signal.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
|
|
#include "a52.h"
|
|
#include "a52_internal.h"
|
|
|
|
extern sample_t imdct_window[];
|
|
|
|
void
|
|
imdct_do_512_mlib(sample_t data[], sample_t delay[], sample_t bias)
|
|
{
|
|
sample_t *buf_real;
|
|
sample_t *buf_imag;
|
|
sample_t *data_ptr;
|
|
sample_t *delay_ptr;
|
|
sample_t *window_ptr;
|
|
sample_t tmp[256] __attribute__((aligned(16)));
|
|
int i;
|
|
|
|
memcpy(tmp, data, 256 * sizeof(sample_t));
|
|
mlib_SignalIMDCT_F32(tmp);
|
|
|
|
buf_real = tmp;
|
|
buf_imag = tmp + 128;
|
|
data_ptr = data;
|
|
delay_ptr = delay;
|
|
window_ptr = imdct_window;
|
|
|
|
/* Window and convert to real valued signal */
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*data_ptr++ = -buf_imag[64+i] * *window_ptr++ + *delay_ptr++ + bias;
|
|
*data_ptr++ = buf_real[64-i-1] * *window_ptr++ + *delay_ptr++ + bias;
|
|
}
|
|
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*data_ptr++ = -buf_real[i] * *window_ptr++ + *delay_ptr++ + bias;
|
|
*data_ptr++ = buf_imag[128-i-1] * *window_ptr++ + *delay_ptr++ + bias;
|
|
}
|
|
|
|
/* The trailing edge of the window goes into the delay line */
|
|
delay_ptr = delay;
|
|
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*delay_ptr++ = -buf_real[64+i] * *--window_ptr;
|
|
*delay_ptr++ = buf_imag[64-i-1] * *--window_ptr;
|
|
}
|
|
|
|
for(i=0; i<64; i++)
|
|
{
|
|
*delay_ptr++ = buf_imag[i] * *--window_ptr;
|
|
*delay_ptr++ = -buf_real[128-i-1] * *--window_ptr;
|
|
}
|
|
}
|
|
|
|
void
|
|
imdct_do_256_mlib(sample_t data[], sample_t delay[], sample_t bias)
|
|
{
|
|
sample_t *buf1_real, *buf1_imag;
|
|
sample_t *buf2_real, *buf2_imag;
|
|
sample_t *data_ptr;
|
|
sample_t *delay_ptr;
|
|
sample_t *window_ptr;
|
|
sample_t tmp[256] __attribute__((aligned(16)));
|
|
int i;
|
|
|
|
memcpy(tmp, data, 256 * sizeof(sample_t));
|
|
mlib_SignalIMDCTSplit_F32(tmp);
|
|
|
|
buf1_real = tmp;
|
|
buf1_imag = tmp + 128 + 64;
|
|
buf2_real = tmp + 64;
|
|
buf2_imag = tmp + 128;
|
|
data_ptr = data;
|
|
delay_ptr = delay;
|
|
window_ptr = imdct_window;
|
|
|
|
/* Window and convert to real valued signal */
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*data_ptr++ = -buf1_imag[i] * *window_ptr++ + *delay_ptr++ + bias;
|
|
*data_ptr++ = buf1_real[64-i-1] * *window_ptr++ + *delay_ptr++ + bias;
|
|
}
|
|
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*data_ptr++ = -buf1_real[i] * *window_ptr++ + *delay_ptr++ + bias;
|
|
*data_ptr++ = buf1_imag[64-i-1] * *window_ptr++ + *delay_ptr++ + bias;
|
|
}
|
|
|
|
delay_ptr = delay;
|
|
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*delay_ptr++ = -buf2_real[i] * *--window_ptr;
|
|
*delay_ptr++ = buf2_imag[64-i-1] * *--window_ptr;
|
|
}
|
|
|
|
for(i=0; i< 64; i++)
|
|
{
|
|
*delay_ptr++ = buf2_imag[i] * *--window_ptr;
|
|
*delay_ptr++ = -buf2_real[64-i-1] * *--window_ptr;
|
|
}
|
|
}
|
|
|
|
#endif
|