Add helper to get device id from name

Author: HEnquist

examples/feedback_interleaved.rs

@@ -8,7 +8,7 @@ use std::sync::{Arc, Mutex};
 use coreaudio::audio_unit::audio_format::LinearPcmFlags;
 use coreaudio::audio_unit::render_callback::{self, data};
 use coreaudio::audio_unit::{audio_unit_from_device_id, get_default_device_id, get_device_name};
-use coreaudio::audio_unit::{Element, SampleFormat, Scope, StreamFormat, RateListener};
+use coreaudio::audio_unit::{Element, RateListener, SampleFormat, Scope, StreamFormat};
 use coreaudio::sys::*;
 
 const SAMPLE_RATE: f64 = 44100.0;
@@ -76,7 +76,7 @@ fn main() -> Result<(), coreaudio::Error> {
     // Register a rate listener for playback
     let mut listener_pb = RateListener::new(output_device_id, None)?;
     listener_pb.register()?;
-    
+
     // Register a rate listener for capture
     let mut listener_cap = RateListener::new(input_device_id, None)?;
     listener_cap.register()?;

src/audio_unit/macos_helpers.rs

@@ -61,6 +61,19 @@ pub fn get_default_device_id(input: bool) -> Option<AudioDeviceID> {
     Some(audio_device_id)
 }
 
+/// Helper function to get the device id of from a device name.
+/// Only implemented for macOS, not iOS.
+pub fn get_device_id_from_name(name: &str) -> Option<AudioDeviceID> {
+    if let Ok(all_ids) = get_audio_device_ids() {
+        return all_ids
+            .iter()
+            .find(|id| get_device_name(**id).unwrap_or("".to_string()) == name)
+            .map(|id| *id);
+    } else {
+        return None;
+    }
+}
+
 /// Create an AudioUnit instance from a device id.
 /// Only implemented for macOS, not iOS.
 pub fn audio_unit_from_device_id(