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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 <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "endianmacros.h"
#include "sconv.h"
#include "g711.h"
#include "sconv-s16le.h"
#include "sconv-s16be.h"
static void u8_to_float32ne(unsigned n, const void *a, unsigned an, float *b) {
unsigned i;
const uint8_t *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
float sum = 0;
for (i = 0; i < an; i++) {
uint8_t v = *(ca++);
sum += (((float) v)-128)/127;
}
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
static void u8_from_float32ne(unsigned n, const float *a, void *b, unsigned bn) {
unsigned i;
uint8_t *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
float v = *(a++);
uint8_t u;
if (v > 1)
v = 1;
if (v < -1)
v = -1;
u = (uint8_t) (v*127+128);
for (i = 0; i < bn; i++)
*(cb++) = u;
}
}
static void float32ne_to_float32ne(unsigned n, const void *a, unsigned an, float *b) {
unsigned i;
const float *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
float sum = 0;
for (i = 0; i < an; i++)
sum += *(ca++);
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
static void float32ne_from_float32ne(unsigned n, const float *a, void *b, unsigned bn) {
unsigned i;
float *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
float v = *(a++);
for (i = 0; i < bn; i++)
*(cb++) = v;
}
}
static void ulaw_to_float32ne(unsigned n, const void *a, unsigned an, float *b) {
unsigned i;
const uint8_t *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
float sum = 0;
for (i = 0; i < an; i++)
sum += (float) st_ulaw2linear16(*ca++) / 0x7FFF;
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
static void ulaw_from_float32ne(unsigned n, const float *a, void *b, unsigned bn) {
unsigned i;
uint8_t *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
float v = *(a++);
uint8_t u;
if (v > 1)
v = 1;
if (v < -1)
v = -1;
u = st_14linear2ulaw((int16_t) (v * 0x1FFF));
for (i = 0; i < bn; i++)
*(cb++) = u;
}
}
static void alaw_to_float32ne(unsigned n, const void *a, unsigned an, float *b) {
unsigned i;
const uint8_t *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
float sum = 0;
for (i = 0; i < an; i++)
sum += (float) st_alaw2linear16(*ca++) / 0x7FFF;
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
static void alaw_from_float32ne(unsigned n, const float *a, void *b, unsigned bn) {
unsigned i;
uint8_t *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
float v = *(a++);
uint8_t u;
if (v > 1)
v = 1;
if (v < -1)
v = -1;
u = st_13linear2alaw((int16_t) (v * 0xFFF));
for (i = 0; i < bn; i++)
*(cb++) = u;
}
}
pa_convert_to_float32ne_func_t pa_get_convert_to_float32ne_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_U8:
return u8_to_float32ne;
case PA_SAMPLE_S16LE:
return pa_sconv_s16le_to_float32ne;
case PA_SAMPLE_S16BE:
return pa_sconv_s16be_to_float32ne;
case PA_SAMPLE_FLOAT32NE:
return float32ne_to_float32ne;
case PA_SAMPLE_ALAW:
return alaw_to_float32ne;
case PA_SAMPLE_ULAW:
return ulaw_to_float32ne;
default:
return NULL;
}
}
pa_convert_from_float32ne_func_t pa_get_convert_from_float32ne_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_U8:
return u8_from_float32ne;
case PA_SAMPLE_S16LE:
return pa_sconv_s16le_from_float32ne;
case PA_SAMPLE_S16BE:
return pa_sconv_s16be_from_float32ne;
case PA_SAMPLE_FLOAT32NE:
return float32ne_from_float32ne;
case PA_SAMPLE_ALAW:
return alaw_from_float32ne;
case PA_SAMPLE_ULAW:
return ulaw_from_float32ne;
default:
return NULL;
}
}
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