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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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 of the License,
or (at your option) any later version.
polypaudio 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 Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <inttypes.h>
#include <liboil/liboilfuncs.h>
#include "endianmacros.h"
#include "sconv.h"
#include "sconv-s16le.h"
#include "log.h"
#ifndef INT16_FROM
#define INT16_FROM INT16_FROM_LE
#endif
#ifndef INT16_TO
#define INT16_TO INT16_TO_LE
#endif
#ifndef SWAP_WORDS
#ifdef WORDS_BIGENDIAN
#define SWAP_WORDS 1
#else
#define SWAP_WORDS 0
#endif
#endif
void pa_sconv_s16le_to_float32ne(unsigned n, const void *a, float *b) {
const int16_t *ca = a;
assert(a);
assert(b);
#if SWAP_WORDS == 1
for (; n > 0; n--) {
int16_t s = *(ca++);
*(b++) = ((float) INT16_FROM(s))/0x7FFF;
}
#else
{
static const double add = 0, factor = 1.0/0x7FFF;
oil_scaleconv_f32_s16(b, ca, n, &add, &factor);
}
#endif
}
void pa_sconv_s16le_from_float32ne(unsigned n, const float *a, void *b) {
int16_t *cb = b;
assert(a);
assert(b);
#if SWAP_WORDS == 1
for (; n > 0; n--) {
int16_t s;
float v = *(a++);
if (v > 1)
v = 1;
if (v < -1)
v = -1;
s = (int16_t) (v * 0x7FFF);
*(cb++) = INT16_TO(s);
}
#else
{
static const double add = 0, factor = 0x7FFF;
oil_scaleconv_s16_f32(cb, a, n, &add, &factor);
}
#endif
}
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