feat: add JACK and ASIO backend support

Add support for professional audio backends:
- JACK backend for audio routing between applications (Linux only)
- ASIO backend for low-latency audio with direct hardware access (Windows only)
- Update device examples to include new backends
- Document build requirements and dependencies

.github/workflows/check-beta.yml

@@ -11,12 +11,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          - os: ubuntu-latest
+            features: --features jack
 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Install build tools and ALSA dependencies (Linux only)
+      - name: Install build tools and dependencies (Linux only)
         if: matrix.os == 'ubuntu-latest'
         run: |
           sudo apt-get update && sudo apt-get install -y libasound2-dev
@@ -27,6 +30,6 @@ jobs:
       - name: Cache Rust dependencies
         uses: Swatinem/rust-cache@v2
 
-      - name: Check on ${{ matrix.os }} with Rust stable
+      - name: Check on ${{ matrix.os }} with Rust beta
         run: |
-          cargo check --verbose
+          cargo check --verbose ${{ matrix.features || '' }}

.github/workflows/check-stable.yml

@@ -19,15 +19,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          - os: ubuntu-latest
+            features: --features jack
 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Install build tools and ALSA dependencies (Linux only)
+      - name: Install build tools and dependencies (Linux only)
         if: matrix.os == 'ubuntu-latest'
         run: |
-          sudo apt-get update && sudo apt-get install -y libasound2-dev
+          sudo apt-get update && sudo apt-get install -y libasound2-dev libjack-dev
 
       - name: Install Rust stable
         run: rustup toolchain install stable --profile minimal
@@ -37,4 +40,4 @@ jobs:
 
       - name: Compile on ${{ matrix.os }} with Rust stable
         run: |
-          cargo check --verbose
+          cargo check --verbose ${{ matrix.features || '' }}

.github/workflows/code-quality.yml

@@ -20,9 +20,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Install build tools and ALSA dependencies
+      - name: Install build tools and dependencies
         run: |
-          sudo apt-get update && sudo apt-get install -y libasound2-dev
+          sudo apt-get update && sudo apt-get install -y libasound2-dev libjack-dev
 
       - name: Install Rust stable
         run: rustup toolchain install stable
@@ -34,4 +34,4 @@ jobs:
         run: cargo fmt --all -- --check
 
       - name: Check Clippy lints
-        run: cargo clippy --all-targets -- -D warnings
+        run: cargo clippy --all-targets --all-features -- -D warnings

CHANGELOG.md

@@ -8,6 +8,7 @@ and [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/).
 ## [Unreleased]
 
 ### Added
+- [player] Support JACK and ASIO audio backends
 - [player] Queue reordering with position tracking
 - [remote] Queue shuffle support with state synchronization
 - [remote] Initial volume setting that remains active until client takes control below maximum

Cargo.toml

@@ -17,8 +17,22 @@ maintenance = { status = "actively-developed" }
 
 [features]
 default = ["binary"]
+
+# Enable command-line interface and binary build
 binary = ["dep:clap"]
 
+# Enable ASIO (Audio Stream Input/Output) backend for low-latency audio (Windows only)
+# Requires Steinberg ASIO SDK and additional build setup
+# See: https://docs.rs/crate/cpal/latest
+asio = ["cpal/asio"]
+
+# Enable JACK (JACK Audio Connection Kit) backend for low-latency audio with flexible routing
+# (Linux only)
+# Requires JACK development files:
+# - Debian/Ubuntu: libjack-dev
+# - Fedora: jack-audio-connection-kit-devel
+jack = ["cpal/jack"]
+
 [dependencies]
 base64 = "0.22"
 blowfish = "0.9"
@@ -111,6 +125,7 @@ protoc-bin-vendored = "3"
 [package.metadata.deb]
 copyright = "2024, Roderick van Domburg"
 depends = "libasound2"
+suggests = "libjack-dev"
 section = "sound"
 priority = "optional"
 assets = [