fix(alsa): wrong channel map in stream config sent to callback

Author: SolarLiner

src/backends/alsa/input.rs

@@ -21,7 +21,7 @@ impl<Callback: 'static + Send + AudioInputCallback> AlsaStream<Callback> {
                 }
                 let buffer = AudioRef::from_interleaved(&ctx.buffer, ctx.num_channels).unwrap();
                 let context = AudioCallbackContext {
-                    stream_config,
+                    stream_config: *ctx.config,
                     timestamp: *ctx.timestamp,
                 };
                 let input = AudioInput {

src/backends/alsa/stream.rs

@@ -71,8 +71,7 @@ impl<Callback: 'static + Send> AlsaStream<Callback> {
                 log::info!("Sample rate : {samplerate}");
                 let stream_config = StreamConfig {
                     samplerate,
-                    channels: ChannelMap32::default()
-                        .with_indices(std::iter::repeat(1).take(num_channels)),
+                    channels: ChannelMap32::default().with_indices(0..num_channels),
                     buffer_size_range: (Some(period_size), Some(period_size)),
                     exclusive: false,
                 };