int main(void)
{
long max,min;
int i;
for( i=0; i<10000; i++ )
{
long dither = PaConvert_TriangularDither();
// printf("dither = 0x%08X\n", dither );
if( dither < min ) min = dither;
else if( dither > max ) max = dither;
}
printf("min = 0x%08X = %d, max = 0x%08X = %d\n", min, min, max, max );
}
static void PaConvert_Float32_Int16_Dither(
float *sourceBuffer, int sourceStride,
short *targetBuffer, int targetStride,
int numSamples )
{
int i;
for( i=0; i<numSamples; i++ )
{
/* use smaller scaler to prevent overflow when we add the dither */
float dither = PaConvert_TriangularDither() * PA_DITHER_SCALE;
float dithered = (*sourceBuffer * (32766.0f)) + dither;
*targetBuffer = (short) dithered;
sourceBuffer += sourceStride;
targetBuffer += targetStride;
}
}
static void PaConvert_Float32_Int8_Dither(
float *sourceBuffer, int sourceStride,
char *targetBuffer, int targetStride,
int numSamples )
{
int i;
for( i=0; i<numSamples; i++ )
{
/* use smaller scaler to prevent overflow when we add the dither */
float dither = PaConvert_TriangularDither() * PA_DITHER_SCALE; /* FIXME */
float dithered = (*sourceBuffer * (126.0f)) + dither;
long samp = (long) dithered;
*targetBuffer = (char) samp;
sourceBuffer += sourceStride;
targetBuffer += targetStride;
}
}