Stereo support in soundmodem soundcards

[m17rt] / m17codec2 / src / tx.rs

diff --git a/m17codec2/src/tx.rs b/m17codec2/src/tx.rs
index c0eb5968fcdd31217ba3dbac6fec5ee0019ed1fe..a54d864a651ec000750dbab27dbfaa082c5e1c11 100644 (file)
--- a/m17codec2/src/tx.rs
+++ b/m17codec2/src/tx.rs
@@ -134,6 +134,33 @@ impl Codec2TxAdapter {
             tx: self.event_tx.clone(),
         }
     }
+
+    /// List sound cards supported for audio input.
+    ///
+    /// M17RT will handle any card with 1 or 2 channels and 16-bit output.
+    pub fn supported_input_cards() -> Vec<String> {
+        let mut out = vec![];
+        let host = cpal::default_host();
+        let Ok(input_devices) = host.input_devices() else {
+            return out;
+        };
+        for d in input_devices {
+            let Ok(mut configs) = d.supported_input_configs() else {
+                continue;
+            };
+            if configs.any(|config| {
+                (config.channels() == 1 || config.channels() == 2)
+                    && config.sample_format() == SampleFormat::I16
+            }) {
+                let Ok(name) = d.name() else {
+                    continue;
+                };
+                out.push(name);
+            }
+        }
+        out.sort();
+        out
+    }
 }
 
 enum Event {