static int allocate_internal_mem(void) {
u32 i;
c_amplitudes = (REAL *)malloc(BPM_DETECT_FFT_POINTS / 2 * sizeof(REAL));
c_samples = (complex_t *)malloc(BPM_DETECT_FFT_POINTS * sizeof(complex_t));
c_pfl_window = (REAL *)malloc(BPM_DETECT_FFT_POINTS * sizeof(REAL));
c_pn_offset = (u16 *)malloc((BPM_DETECT_MAX_BPM + BPM_DETECT_MAX_MARGIN + 2) * sizeof(u16));
if (c_amplitudes == 0 || c_samples == 0 || c_pfl_window == 0 || c_pn_offset == 0) {
free_internal_mem();
return -1;
}
memset(c_amplitudes, 0, BPM_DETECT_FFT_POINTS / 2 * sizeof(REAL));
memset(c_samples, 0, BPM_DETECT_FFT_POINTS * sizeof(complex_t));
memset(c_pfl_window, 0, BPM_DETECT_FFT_POINTS * sizeof(REAL));
memset(c_pn_offset, 0, (BPM_DETECT_MAX_BPM + BPM_DETECT_MAX_MARGIN + 2) * sizeof(u16));
c_pSubBand = (struct subband_t *)malloc(BPM_NUMBER_OF_SUBBANDS * sizeof(struct subband_t));
if (c_pSubBand == 0) {
free_internal_mem();
return -1;
}
memset(c_pSubBand, 0, BPM_NUMBER_OF_SUBBANDS * sizeof(struct subband_t));
for (i = 0; i < BPM_NUMBER_OF_SUBBANDS; i++) {
c_pSubBand[i].buffer = (REAL *)malloc(c_buffer_size * sizeof(REAL));
if (c_pSubBand[i].buffer == 0) {
free_internal_mem();
return -1;
}
memset(c_pSubBand[i].buffer, 0, c_buffer_size * sizeof(REAL));
c_pSubBand[i].BPM_history_hit = (u16 *)malloc((BPM_DETECT_MAX_BPM + 2) * sizeof(u16));
if (c_pSubBand[i].BPM_history_hit == 0) {
free_internal_mem();
return -1;
}
}
/*
* create COSINE window
*/
for (i = 0; i < BPM_DETECT_FFT_POINTS; i++) {
c_pfl_window[i] = (REAL)(sin((PI * i) / (BPM_DETECT_FFT_POINTS - 1.0)));
}
DEBUG("c_pfl_window:\n");
for (i = 1; i < BPM_DETECT_FFT_POINTS; i++) {
if (i % 5 == 0) DEBUG("\n");
DEBUG("%f, ", c_pfl_window[i]);
}
DEBUG("\n");
c_ready = 1;
return 0;
}
static void
pin_stats_tree_free (PinStatAddress *node)
{
if (!node)
return;
pin_stats_tree_free (node->left);
pin_stats_tree_free (node->right);
free_internal_mem (node, INTERNAL_MEM_STATISTICS);
}
/*
* de-initialize of BPM detetion algorithm
*
* PARAMETERS:
* None
*
* RETURN VALUES:
* None
*
* REMARKS:
* Call this function if you do not need the BPM detection algorythm
*
*/
void BPM_release(void) {
free_internal_mem();
}
