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audio: update examples

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Signed-off-by: HiFiPhile <admin@hifiphile.com>
This commit is contained in:
HiFiPhile
2025-06-14 19:37:10 +02:00
parent 19b5ec5fd9
commit 545690c834
18 changed files with 839 additions and 1120 deletions
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51
examples/device/cdc_uac2/src/uac2_app.c
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@@ -49,17 +49,36 @@ uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
int8_t mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1]; // +1 for master channel 0
int16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1]; // +1 for master channel 0
// Buffer for microphone data
int32_t mic_buf[CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ / 4];
// Buffer for speaker data
int32_t spk_buf[CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ / 4];
// Speaker data size received in the last frame
int spk_data_size;
uint16_t spk_data_size;
// Resolution per format
const uint8_t resolutions_per_format[CFG_TUD_AUDIO_FUNC_1_N_FORMATS] = {CFG_TUD_AUDIO_FUNC_1_FORMAT_1_RESOLUTION_RX};
// Current resolution, update on format change
uint8_t current_resolution;
//--------------------------------------------------------------------+
// AUDIO Task
//--------------------------------------------------------------------+
// This task simulates an audio transfer callback, one frame is sent/received every 1ms.
// In a real application, this would be replaced with actual I2S send/receive callback.
void audio_task(void) {
static uint32_t start_ms = 0;
uint32_t curr_ms = board_millis();
if (start_ms == curr_ms) return;// not enough time
start_ms = curr_ms;
// When new data arrived, copy data from speaker buffer, to microphone buffer
// and send it over
// Only support speaker & headphone both have the same resolution
// If one is 16bit another is 24bit be care of LOUD noise !
spk_data_size = tud_audio_read(spk_buf, sizeof(spk_buf));
if (spk_data_size) {
tud_audio_write((uint8_t *) spk_buf, spk_data_size);
}
}
// Helper for clock get requests
static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t const *request)
{
@@ -265,8 +284,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque
blink_interval_ms = BLINK_STREAMING;
}
// Clear buffer when streaming format is changed
spk_data_size = 0;
if(alt != 0)
{
current_resolution = resolutions_per_format[alt-1];
@@ -275,30 +292,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque
return true;
}
bool tud_audio_rx_done_pre_read_cb(uint8_t rhport, uint16_t n_bytes_received, uint8_t func_id, uint8_t ep_out, uint8_t cur_alt_setting)
{
(void)rhport;
(void)func_id;
(void)ep_out;
(void)cur_alt_setting;
spk_data_size = tud_audio_read(spk_buf, n_bytes_received);
tud_audio_write(spk_buf, n_bytes_received);
return true;
}
bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
{
(void)rhport;
(void)itf;
(void)ep_in;
(void)cur_alt_setting;
// This callback could be used to fill microphone data separately
return true;
}
//--------------------------------------------------------------------+
// BLINKING TASK
//--------------------------------------------------------------------+