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#include <stdlib.h>
#include <assert.h>
#include "endianmacros.h"
#include "sconv.h"
static void s16le_to_float32(unsigned n, const void *a, unsigned an, float *b) {
const int16_t *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
unsigned i;
float sum = 0;
for (i = 0; i < an; i++) {
int16_t s = *(ca++);
sum += ((float) INT16_FROM_LE(s))/0x7FFF;
}
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
static void s16le_from_float32(unsigned n, const float *a, void *b, unsigned bn) {
int16_t *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
unsigned i;
int16_t s;
float v = *(a++);
if (v > 1)
v = 1;
if (v < -1)
v = -1;
s = (int16_t) (v * 0x7FFF);
for (i = 0; i < bn; i++)
*(cb++) = INT16_TO_LE(v);
}
}
static void float32_to_float32(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 float32_from_float32(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;
}
}
convert_to_float32_func_t get_convert_to_float32_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_S16LE:
return s16le_to_float32;
case PA_SAMPLE_FLOAT32:
return float32_to_float32;
default:
return NULL;
}
}
convert_from_float32_func_t get_convert_from_float32_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_S16LE:
return s16le_from_float32;
case PA_SAMPLE_FLOAT32:
return float32_from_float32;
default:
return NULL;
}
}
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