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/*
* 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
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