feat(lambda-rs): Add audio device enumeration & playback

.github/workflows/compile_lambda_rs.yml

@@ -23,12 +23,21 @@ jobs:
           - os: ubuntu-latest
             rustup-toolchain: "stable"
             features: "lambda-rs/with-vulkan"
+          - os: ubuntu-latest
+            rustup-toolchain: "stable"
+            features: "lambda-rs/with-vulkan,lambda-rs/audio-output-device"
           - os: windows-latest
             rustup-toolchain: "stable"
             features: "lambda-rs/with-dx12"
+          - os: windows-latest
+            rustup-toolchain: "stable"
+            features: "lambda-rs/with-dx12,lambda-rs/audio-output-device"
           - os: macos-latest
             rustup-toolchain: "stable"
             features: "lambda-rs/with-metal"
+          - os: macos-latest
+            rustup-toolchain: "stable"
+            features: "lambda-rs/with-metal,lambda-rs/audio-output-device"
 
     steps:
       - name: Checkout Repository
@@ -50,6 +59,13 @@ jobs:
             libwayland-dev libudev-dev \
             libvulkan-dev libvulkan1 mesa-vulkan-drivers vulkan-tools
 
+      - name: Install Linux deps for audio
+        if: ${{ matrix.os == 'ubuntu-latest' && contains(matrix.features, 'lambda-rs/audio-output-device') }}
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libasound2-dev
+
       - name: Configure Vulkan (Ubuntu)
         if: ${{ matrix.os == 'ubuntu-latest' }}
         run: |

crates/lambda-rs-platform/Cargo.toml

@@ -22,6 +22,7 @@ obj-rs = "=0.7.4"
 wgpu = { version = "=28.0.0", optional = true, features = ["wgsl", "spirv"] }
 pollster = { version = "=0.4.0", optional = true }
 lambda-rs-logging = { path = "../lambda-rs-logging", version = "2023.1.30" }
+cpal = { version = "=0.17.1", optional = true }
 
 # Force windows crate to 0.62 to unify wgpu-hal and gpu-allocator dependencies.
 # Both crates support this version range, but Cargo may resolve to different
@@ -48,3 +49,11 @@ wgpu-with-vulkan = ["wgpu"]
 wgpu-with-metal = ["wgpu", "wgpu/metal"]
 wgpu-with-dx12 = ["wgpu", "wgpu/dx12"]
 wgpu-with-gl = ["wgpu", "wgpu/webgl"]
+
+# ---------------------------------- AUDIO ------------------------------------
+
+# Umbrella features (disabled by default)
+audio = ["audio-device"]
+
+# Granular feature flags (disabled by default)
+audio-device = ["dep:cpal"]