void ProcessBuffer()
///////////////////////////////////////////////////////////////////////
// Purpose: Processes the data in buffer[ready_index] and stores
// the results back into the buffer
//
// Input: None
//
// Returns: Nothing
//
// Calls: Nothing
//
// Notes: None
///////////////////////////////////////////////////////////////////////
{
Uint32 i;
volatile float *pL = buffer[ready_index][LEFT];
// volatile float *pR = buffer[ready_index][RIGHT];
static int frame_count = 0;
/* copy left channel to complex array */
for(i=0;i < BUFFER_LENGTH;i++){
x[i].real = *pL++;
x[i].imag = 0;
}
/* calculate the FFT of x[N] */
fft_c(N, x, W);
/* get magnitude of complex array */
for(i=0;i < BUFFER_LENGTH;i++){
y[i] = sqrtf(x[i].real*x[i].real + x[i].imag*x[i].imag);
}
if(frame_count++ > 0) {
frame_count = 0; // put probe point here
}
buffer_ready = 0;
}
void ZeroBuffers()
////////////////////////////////////////////////////////////////////////
// Purpose: Sets all buffer locations to 0
//
// Input: None
//
// Returns: Nothing
//
// Calls: Nothing
//
// Notes: None
///////////////////////////////////////////////////////////////////////
{
Int32 i = BUFFER_COUNT * NUM_BUFFERS;
Int32 *p = (Int32 *)buffer;
while(i--)
*p++ = 0;
init_W(N, W);
init_W_neg(N, WN);
padToN(B, N_coeff + 1);
for(i = 0; i < N; i++)
{
coeffs[i].real = B_pad[i];
coeffs[i].imag = 0.0f;
}
for(i = 0; i < (N - BUFFER_COUNT); i++) {
saved[i] = 0;
}
fft_c(N, coeffs, W);
}
void fft_execute(struct fft_desc_t * desc, struct complex_t * signal)
{
fft_c(desc->size, signal, desc->W);
}
void fft(struct fft_desc_t * desc, struct complex_t * data)
{
fft_c(desc->size, data, desc->W);
}
