Voice UDP to RF conversion, and better sample rate management in codec2

[m17rt] / m17codec2 / src / soundcards.rs

diff --git a/m17codec2/src/soundcards.rs b/m17codec2/src/soundcards.rs
new file mode 100644 (file)
index 0000000..24cff0a
--- /dev/null
+++ b/m17codec2/src/soundcards.rs
@@ -0,0 +1,61 @@
+//! Utilities for selecting suitable sound cards.
+
+use cpal::{
+    traits::{DeviceTrait, HostTrait},
+    SampleFormat,
+};
+
+/// List sound cards supported for audio output.
+///
+/// M17RT will handle any card with 1 or 2 channels and 16-bit output.
+pub fn supported_output_cards() -> Vec<String> {
+    let mut out = vec![];
+    let host = cpal::default_host();
+    let Ok(output_devices) = host.output_devices() else {
+        return out;
+    };
+    for d in output_devices {
+        let Ok(mut configs) = d.supported_output_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
+}
+
+/// 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
+}