Use objc2

Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "coreaudio-rs"
 version = "0.12.1"
-authors = ["mitchmindtree <[email protected]>", "yupferris <[email protected]>"]
+authors = [
+    "mitchmindtree <[email protected]>",
+    "yupferris <[email protected]>",
+]
 description = "A friendly rust interface for Apple's CoreAudio API."
 keywords = ["core", "audio", "unit", "osx", "ios"]
 readme = "README.md"
@@ -14,19 +17,33 @@ homepage = "https://github.com/RustAudio/coreaudio-rs"
 name = "coreaudio"
 
 [features]
-default = ["audio_toolbox", "audio_unit", "core_audio", "open_al", "core_midi"]
-audio_toolbox = ["coreaudio-sys/audio_toolbox"]
-audio_unit = ["coreaudio-sys/audio_unit"]
-core_audio = ["coreaudio-sys/core_audio"]
-open_al = ["coreaudio-sys/open_al"]
-core_midi = ["coreaudio-sys/core_midi"]
+default = ["audio_toolbox", "audio_unit", "core_audio", "core_midi"]
+audio_toolbox = ["dep:objc2-audio-toolbox"]
+core_audio = ["dep:objc2-core-audio", "dep:objc2-core-audio-types"]
+core_midi = ["dep:objc2-core-midi"]
+
+# Deprecated
+audio_unit = ["audio_toolbox"]
+
+# Unsupported
+open_al = []
 
 [dependencies]
 bitflags = "1.0"
-coreaudio-sys = { version = "0.2", default-features = false }
-core-foundation-sys = "0.8.3"
+libc = "0.2"
+
+objc2-core-foundation = { version = "0.3", default-features = false, features = [
+    "std",
+    "CFBase",
+    "CFString",
+] }
+# TODO: Only enable needed features.
+objc2-audio-toolbox = { version = "0.3", optional = true }
+objc2-core-audio = { version = "0.3", optional = true }
+objc2-core-audio-types = { version = "0.3", optional = true }
+objc2-core-midi = { version = "0.3", optional = true }
 
 [package.metadata.docs.rs]
 all-features = true
-default-target = "x86_64-apple-darwin"
-targets = ["x86_64-apple-darwin", "x86_64-apple-ios"]
+default-target = "aarch64-apple-darwin"
+targets = ["aarch64-apple-darwin", "x86_64-apple-darwin", "x86_64-apple-ios"]