Add tvOS support for CoreAudio backend

.github/workflows/platforms.yml

@@ -26,7 +26,7 @@ env:
   # MSRV varies by backend due to platform-specific dependencies
   MSRV_AAUDIO: "1.85"
   MSRV_ALSA: "1.82"
-  MSRV_COREAUDIO: "1.80"
+  MSRV_COREAUDIO: "1.85"
   MSRV_JACK: "1.82"
   MSRV_PIPEWIRE: "1.85"
   MSRV_PULSEAUDIO: "1.88"
@@ -405,6 +405,33 @@ jobs:
         working-directory: examples/ios-feedback
         run: xcodebuild -scheme cpal-ios-example -configuration Debug -derivedDataPath build -sdk iphonesimulator -arch arm64
 
+  # tvOS (Tier 3 target, requires nightly + build-std)
+  tvos:
+    runs-on: macOS-latest
+    env:
+      TARGET: aarch64-apple-tvos
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Install Rust nightly (for build-std)
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rust-src
+
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: tvos
+
+      - name: Check examples (default features)
+        run: cargo +nightly check --examples --workspace --verbose --target ${{ env.TARGET }} -Z build-std
+
+      - name: Check examples (no default features)
+        run: cargo +nightly check --examples --no-default-features --workspace --verbose --target ${{ env.TARGET }} -Z build-std
+
+      - name: Check examples (all features)
+        run: cargo +nightly check --examples --all-features --workspace --verbose --target ${{ env.TARGET }} -Z build-std
+
   # WebAssembly - wasm-bindgen
   wasm-bindgen:
     runs-on: ubuntu-latest
@@ -546,6 +573,7 @@ jobs:
       - macos
       - android
       - ios
+      - tvos
       - wasm-bindgen
       - wasm-audioworklet
       - wasm-wasip1

.github/workflows/quality.yml

@@ -114,12 +114,33 @@ jobs:
         run: cargo clippy --all --target ${{ matrix.target }} ${{ matrix.features }} -- -D warnings
 
   lints-nightly:
-    name: clippy-WASM-worklet
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # WASM - AudioWorklet (requires atomics + build-std)
+          - target: wasm32-unknown-unknown
+            name: WASM-worklet
+            features: --features audioworklet
+            os: ubuntu-latest
+            build_std: std,panic_abort
+            rustflags: -C target-feature=+atomics,+bulk-memory,+mutable-globals
+
+          # tvOS - CoreAudio (Tier 3 target)
+          - target: aarch64-apple-tvos
+            name: tvOS
+            features: ""
+            os: macOS-latest
+            build_std: std
+            rustflags: ""
+
+    name: clippy-${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5
 
       - name: Cache Linux audio packages
+        if: runner.os == 'Linux'
         uses: awalsh128/cache-apt-pkgs-action@latest
         with:
           packages: libasound2-dev libjack-jackd2-dev libjack-jackd2-0 libdbus-1-dev libpipewire-0.3-dev
@@ -128,14 +149,14 @@ jobs:
         uses: dtolnay/rust-toolchain@nightly
         with:
           components: clippy, rust-src
-          targets: wasm32-unknown-unknown
+          targets: ${{ matrix.target }}
 
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
         with:
-          key: clippy-wasm32-worklet
+          key: clippy-${{ matrix.target }}-${{ matrix.name }}
 
-      - name: Run clippy (audioworklet)
+      - name: Run clippy
         env:
-          RUSTFLAGS: -C target-feature=+atomics,+bulk-memory,+mutable-globals
-        run: cargo +nightly clippy --all --target wasm32-unknown-unknown --features audioworklet -Z build-std=std,panic_abort -- -D warnings
+          RUSTFLAGS: ${{ matrix.rustflags }}
+        run: cargo +nightly clippy --all --target ${{ matrix.target }} ${{ matrix.features }} -Z build-std=${{ matrix.build_std }} -- -D warnings

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   backends to override it.
 - `StreamTrait::now()` to query the current instant on the stream's clock.
 - **ALSA**: `device_by_id()` now accepts PCM shorthand names such as `hw:0,0` and `plughw:foo`.
+- **CoreAudio**: tvOS target support (Tier 3, requires nightly).
 - **PipeWire**: New host for Linux and some BSDs using the PipeWire API.
 - **PulseAudio**: New host for Linux and some BSDs using the PulseAudio API.
 
@@ -50,6 +51,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **ASIO**: Stream error callback now receives `StreamError::StreamInvalidated` when the driver
   reports a sample rate change (`sampleRateDidChange`) of 1 Hz or more from the configured rate.
 - **AudioWorklet**: `BufferSize::Fixed` now sets `renderSizeHint` on the `AudioContext`.
+- **CoreAudio**: Bump MSRV to 1.85.
+- **CoreAudio**: Bump `mach2` to 0.6 (uses `core::ffi` instead of `libc`, enables tvOS builds).
 - **CoreAudio**: Timestamps now include device latency and safety offset.
 - **CoreAudio**: Poisoned stream mutex in stream functions now propagate panics.
 - **CoreAudio**: Physical stream format is now set directly on the hardware device.

Cargo.toml

@@ -114,7 +114,7 @@ futures = { version = "0.3", optional = true }
 pipewire = { version = "0.9", optional = true, features = ["v0_3_53"] }
 
 [target.'cfg(target_vendor = "apple")'.dependencies]
-mach2 = "0.5"
+mach2 = "0.6"
 coreaudio-rs = { version = "0.14", default-features = false, features = [
     "core_audio",
     "audio_toolbox",
@@ -147,7 +147,7 @@ objc2 = { version = "0.6" }
 [target.'cfg(target_os = "macos")'.dependencies]
 jack = { version = "0.13", optional = true }
 
-[target.'cfg(target_os = "ios")'.dependencies]
+[target.'cfg(any(target_os = "ios", target_os = "tvos"))'.dependencies]
 block2 = "0.6"
 objc2-foundation = { version = "0.3", features = [
     "block2",

README.md

@@ -11,7 +11,7 @@ The minimum Rust version required depends on which audio backend and features yo
 
 - **AAudio (Android):** Rust **1.85**
 - **ALSA (Linux/BSD):** Rust **1.82**
-- **CoreAudio (macOS/iOS):** Rust **1.80**
+- **CoreAudio (macOS/iOS/tvOS):** Rust **1.85**
 - **JACK (Linux/BSD/macOS/Windows):** Rust **1.82**
 - **PipeWire (Linux/BSD):** Rust **1.85**
 - **PulseAudio (Linux/BSD):** Rust **1.88**

src/host/coreaudio/mod.rs

@@ -1,6 +1,6 @@
 //! CoreAudio backend implementation.
 //!
-//! Default backend on macOS and iOS.
+//! Default backend on macOS, iOS, and tvOS.
 
 use objc2_core_audio_types::{
     kAudioFormatFlagIsFloat, kAudioFormatFlagIsPacked, kAudioFormatFlagIsSignedInteger,
@@ -12,12 +12,14 @@ use crate::{BuildStreamError, SupportedStreamConfigsError};
 
 use crate::{BackendSpecificError, SampleFormat, StreamConfig};
 
-#[cfg(target_os = "ios")]
+// iOS and tvOS share the same CoreAudio / AudioUnit surface (RemoteIO,
+// AVAudioSession), so both target the `ios` submodule.
+#[cfg(not(target_os = "macos"))]
 mod ios;
 #[cfg(target_os = "macos")]
 mod macos;
 
-#[cfg(target_os = "ios")]
+#[cfg(not(target_os = "macos"))]
 #[allow(unused_imports)]
 pub use self::ios::{
     enumerate::{Devices, SupportedInputConfigs, SupportedOutputConfigs},

src/host/mod.rs

@@ -19,7 +19,7 @@ pub(crate) mod asio;
 pub(crate) mod audioworklet;
 #[cfg(windows)]
 pub(crate) mod com;
-#[cfg(any(target_os = "macos", target_os = "ios"))]
+#[cfg(target_vendor = "apple")]
 pub(crate) mod coreaudio;
 #[cfg(all(
     feature = "jack",
@@ -66,8 +66,7 @@ pub(crate) mod custom;
     target_os = "dragonfly",
     target_os = "freebsd",
     target_os = "netbsd",
-    target_os = "macos",
-    target_os = "ios",
+    target_vendor = "apple",
     target_os = "android",
     all(target_arch = "wasm32", feature = "wasm-bindgen"),
 )))]

src/platform/mod.rs

@@ -811,9 +811,9 @@ mod platform_impl {
     }
 }
 
-#[cfg(any(target_os = "macos", target_os = "ios"))]
+#[cfg(target_vendor = "apple")]
 mod platform_impl {
-    #[cfg_attr(docsrs, doc(cfg(any(target_os = "macos", target_os = "ios"))))]
+    #[cfg_attr(docsrs, doc(cfg(target_vendor = "apple")))]
     pub use crate::host::coreaudio::Host as CoreAudioHost;
     #[cfg(all(feature = "jack", target_os = "macos"))]
     #[cfg_attr(docsrs, doc(cfg(all(feature = "jack", target_os = "macos"))))]
@@ -915,8 +915,7 @@ mod platform_impl {
     target_os = "dragonfly",
     target_os = "freebsd",
     target_os = "netbsd",
-    target_os = "macos",
-    target_os = "ios",
+    target_vendor = "apple",
     target_os = "android",
     all(target_arch = "wasm32", feature = "wasm-bindgen"),
 )))]
@@ -929,8 +928,7 @@ mod platform_impl {
             target_os = "dragonfly",
             target_os = "freebsd",
             target_os = "netbsd",
-            target_os = "macos",
-            target_os = "ios",
+            target_vendor = "apple",
             target_os = "android",
             all(target_arch = "wasm32", feature = "wasm-bindgen")
         ))))