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Merged
finger563 merged 2 commits into from
Oct 28, 2025
Merged

feat(t-deck): Improve audio configuration and behavior #555

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feat(t-deck): Improve audio configuration and behavior
finger563 Oct 28, 2025
4c9f028
minor improvement
finger563 Oct 28, 2025
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2 changes: 0 additions & 2 deletions components/t-deck/include/t-deck.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -651,7 +651,5 @@ class TDeck : public BaseComponent {
std::vector<uint8_t> audio_tx_buffer;
StreamBufferHandle_t audio_tx_stream;
i2s_std_config_t audio_std_cfg;
i2s_event_callbacks_t audio_tx_callbacks_;
std::atomic<bool> has_sound{false};
}; // class TDeck
} // namespace espp
26 changes: 3 additions & 23 deletions components/t-deck/src/audio.cpp
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Expand Up @@ -6,15 +6,6 @@ using namespace espp;
// Audio Functions //
////////////////////////

static TaskHandle_t play_audio_task_handle_ = NULL;

static bool IRAM_ATTR audio_tx_sent_callback(i2s_chan_handle_t handle, i2s_event_data_t *event,
void *user_ctx) {
// notify the main task that we're done
vTaskNotifyGiveFromISR(play_audio_task_handle_, NULL);
return true;
}

bool TDeck::initialize_i2s(uint32_t default_audio_rate) {
logger_.info("initializing i2s driver");
logger_.debug("Using newer I2S standard");
Expand Down Expand Up @@ -65,12 +56,6 @@ bool TDeck::initialize_i2s(uint32_t default_audio_rate) {

audio_tx_stream = xStreamBufferCreate(buffer_size * 4, 0);

play_audio_task_handle_ = xTaskGetCurrentTaskHandle();

memset(&audio_tx_callbacks_, 0, sizeof(audio_tx_callbacks_));
audio_tx_callbacks_.on_sent = audio_tx_sent_callback;
i2s_channel_register_event_callback(audio_tx_handle, &audio_tx_callbacks_, NULL);

xStreamBufferReset(audio_tx_stream);

ESP_ERROR_CHECK(i2s_channel_enable(audio_tx_handle));
Expand Down Expand Up @@ -125,13 +110,13 @@ bool TDeck::audio_task_callback(std::mutex &m, std::condition_variable &cv, bool
// pointers to the buffer to the correct positions.
int16_t *ptr = reinterpret_cast<int16_t *>(buffer);
for (int i = 0; i < (available / 2); ++i) {
int16_t sample = ptr[i];
ptr[i] = static_cast<int16_t>((sample * volume_) / 100.0f);
int32_t sample = (ptr[i] * volume_) / 100.0f;
ptr[i] = std::clamp<int16_t>(static_cast<int16_t>(sample), INT16_MIN, INT16_MAX);
}
}

// write the buffer to the I2S channel
i2s_channel_write(audio_tx_handle, buffer, available, NULL, portMAX_DELAY);
i2s_channel_write(audio_tx_handle, buffer, buffer_size, NULL, portMAX_DELAY);
}
return false; // don't stop the task
}
Expand Down Expand Up @@ -164,11 +149,6 @@ void TDeck::audio_sample_rate(uint32_t sample_rate) {
void TDeck::play_audio(const std::vector<uint8_t> &data) { play_audio(data.data(), data.size()); }

void TDeck::play_audio(const uint8_t *data, uint32_t num_bytes) {
play_audio_task_handle_ = xTaskGetCurrentTaskHandle();
if (has_sound) {
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
}
// don't block here
xStreamBufferSendFromISR(audio_tx_stream, data, num_bytes, NULL);
has_sound = true;
}
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