feat(stereo): 新增不同型号的小爱音箱组立体声应用

examples/stereo/src/audio/config.rs

@@ -0,0 +1,61 @@
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum AudioScene {
+    Music,
+    Voice,
+}
+
+#[derive(Debug, Clone)]
+pub struct AudioConfig {
+    // ALSA 设备参数，用于录音和播放
+    pub capture_device: String,
+    pub playback_device: String,
+    pub sample_rate: u32,
+    pub channels: u16,
+    pub frame_size: usize, // 帧大小，单位为采样点
+
+    // Opus 编解码参数，用于音频传输
+    pub audio_scene: AudioScene,
+    pub bitrate: i32,
+    pub vbr: bool, // 是否启用 VBR（动态比特率）
+    pub fec: bool, // 是否启用 FEC（内联前向纠错）
+}
+
+impl AudioConfig {
+    pub fn music() -> Self {
+        Self {
+            audio_scene: AudioScene::Music,
+            sample_rate: 48_000, // 48kHz
+            channels: 2,
+            frame_size: 960,  // 20ms at 48kHz
+            bitrate: 320_000, // 320 kbps
+            ..Default::default()
+        }
+    }
+
+    pub fn voice() -> Self {
+        Self {
+            audio_scene: AudioScene::Voice,
+            sample_rate: 16_000, // 16kHz
+            channels: 1,
+            frame_size: 320, // 20ms at 16kHz
+            bitrate: 32_000, // 32 kbps
+            ..Default::default()
+        }
+    }
+}
+
+impl Default for AudioConfig {
+    fn default() -> Self {
+        Self {
+            audio_scene: AudioScene::Voice,
+            capture_device: "plug:Capture".to_string(),
+            playback_device: "default".to_string(),
+            sample_rate: 16_000,
+            channels: 1,
+            frame_size: 320, // 20ms at 16kHz
+            bitrate: 32_000,
+            vbr: false,
+            fec: false,
+        }
+    }
+}