pub fn measure_buffer_latency(
audio_service: State<'_, Mutex<AudioService>>,
) -> Result<BufferLatencyDto, String>Expand description
Estimates the I/O buffer latency from the current CPAL stream configuration.
Reads the configured frame count for both the input and output streams and converts
them to milliseconds using (frames / sample_rate) × 1000. If either stream uses
BufferSize::Default, a fallback of 256 frames is used.
The result is logged at info level and returned to the frontend.
§Returns
Ok(latency) — a BufferLatencyDto with input_buffer_latency_ms,
output_buffer_latency_ms, and total_buffer_latency_ms.
§Errors
Returns Err if the AudioService mutex cannot be locked.