code.octet-stream.net Git - m17rt/blob - m17codec2/src/soundcards.rs

   1 //! Utilities for selecting suitable sound cards.
   2
   3 use cpal::{
   4     traits::{DeviceTrait, HostTrait},
   5     SampleFormat,
   6 };
   7
   8 /// List sound cards supported for audio output.
   9 ///
  10 /// M17RT will handle any card with 1 or 2 channels and 16-bit output.
  11 pub fn supported_output_cards() -> Vec<String> {
  12     let mut out = vec![];
  13     let host = cpal::default_host();
  14     let Ok(output_devices) = host.output_devices() else {
  15         return out;
  16     };
  17     for d in output_devices {
  18         let Ok(mut configs) = d.supported_output_configs() else {
  19             continue;
  20         };
  21         if configs.any(|config| {
  22             (config.channels() == 1 || config.channels() == 2)
  23                 && config.sample_format() == SampleFormat::I16
  24         }) {
  25             let Ok(name) = d.name() else {
  26                 continue;
  27             };
  28             out.push(name);
  29         }
  30     }
  31     out.sort();
  32     out
  33 }
  34
  35 /// List sound cards supported for audio input.
  36 ///
  37 ///
  38 /// M17RT will handle any card with 1 or 2 channels and 16-bit output.
  39 pub fn supported_input_cards() -> Vec<String> {
  40     let mut out = vec![];
  41     let host = cpal::default_host();
  42     let Ok(input_devices) = host.input_devices() else {
  43         return out;
  44     };
  45     for d in input_devices {
  46         let Ok(mut configs) = d.supported_input_configs() else {
  47             continue;
  48         };
  49         if configs.any(|config| {
  50             (config.channels() == 1 || config.channels() == 2)
  51                 && config.sample_format() == SampleFormat::I16
  52         }) {
  53             let Ok(name) = d.name() else {
  54                 continue;
  55             };
  56             out.push(name);
  57         }
  58     }
  59     out.sort();
  60     out
  61 }