void
fft (float x[], int n, int isign)
{
//int isReverse = 0; // never used
int c;
kiss_fft_cfg cfg;
if (cfg_forward == NULL)
{
initialize_fft (n);
}
for (c = 0; c < n * 2; c += 2)
{
fin[c / 2].r = x[c];
fin[c / 2].i = -x[c + 1];
}
if (isign == -1)
{
cfg = cfg_reverse;
}
else
{
cfg = cfg_forward;
}
kiss_fft (cfg, fin, fout);
for (c = 0; c < n * 2; c += 2)
{
x[c] = fout[(c) / 2].r;
x[c + 1] = -fout[(c) / 2].i;
}
}
ReplayAudioBufferPlayout::ReplayAudioBufferPlayout( ) {
max_channel_no = 0;
/*
* FIXME
* these need to agree between playout and ingest, but they're
* defined separately in both places.
*/
fft_size = 1024;
fft_hop = 128;
scale_factor = float(fft_hop) / (float(fft_size) * float(fft_size));
initialize_fft( );
}
