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apps/auracast_usb: use float instead of double

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Cortex M-33 FPU doesn't support double precision arithmetic. Use float
instead of double so the performance can be improved. This allows to use
better interpolator in resampler.
This commit is contained in:
Krzysztof Kopyściński
2024-04-15 11:50:18 +02:00
committed by Krzysztof Kopyściński
parent 0c401ebb0c
commit 2c1b130cf0
1 changed files with 5 additions and 5 deletions
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apps/auracast_usb/src/audio_usb.c
+5 -5
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@@ -60,9 +60,9 @@ static int16_t samples_read[AUDIO_BUF_SIZE];
/* 155 is maximum value Octets Per Codec Frame described in Table 3.5 of BAP specification */
static float samples_read_float[AUDIO_BUF_SIZE];
static float resampled_float[AUDIO_BUF_SIZE];
double resampler_in_rate = AUDIO_PCM_SAMPLE_RATE;
double resampler_out_rate = LC3_SAMPLING_FREQ;
double resampler_ratio;
float resampler_in_rate = AUDIO_PCM_SAMPLE_RATE;
float resampler_out_rate = LC3_SAMPLING_FREQ;
float resampler_ratio;
SRC_STATE *resampler_state;
static struct ble_gap_event_listener feedback_listener;
#endif
@@ -74,7 +74,7 @@ static int
ble_hs_gap_event_handler(struct ble_gap_event *event, void *arg)
{
struct ble_hci_vs_subev_iso_hci_feedback *feedback_pkt;
double adjust = 0;
float adjust = 0;
if (event->type == BLE_GAP_EVENT_UNHANDLED_HCI_EVENT &&
event->unhandled_hci.is_le_meta == false &&
@@ -266,7 +266,7 @@ audio_usb_init(void)
int rc;
assert(resampler_state == NULL);
resampler_state = src_new(SRC_ZERO_ORDER_HOLD, AUDIO_CHANNELS, NULL);
resampler_state = src_new(SRC_SINC_FASTEST, AUDIO_CHANNELS, NULL);
assert(resampler_state != NULL);
rc = ble_gap_event_listener_register(&feedback_listener,