feat(*): subsonic client with avfoundation playback and apple music ui

Packages/AmphlifyKit/Sources/Domain/AudioFormat.swift

@@ -0,0 +1,32 @@
+import Foundation
+
+public struct AudioFormat: Hashable, Codable, Sendable {
+    public enum Codec: String, Codable, Sendable {
+        case flac, alac, wav, mp3, aac, opus, vorbis, eac3
+    }
+
+    public var codec: Codec
+    public var bitrateKbps: Int?
+    public var sampleRate: Int?
+    public var bitDepth: Int?
+    public var channels: Int
+
+    public init(codec: Codec, bitrateKbps: Int? = nil, sampleRate: Int? = nil, bitDepth: Int? = nil, channels: Int = 2) {
+        self.codec = codec
+        self.bitrateKbps = bitrateKbps
+        self.sampleRate = sampleRate
+        self.bitDepth = bitDepth
+        self.channels = channels
+    }
+
+    public var isLossless: Bool {
+        switch codec {
+        case .flac, .alac, .wav: true
+        default: false
+        }
+    }
+
+    public var isHiRes: Bool {
+        isLossless && ((sampleRate ?? 0) > 48000 || (bitDepth ?? 0) > 16 && (sampleRate ?? 0) > 44100)
+    }
+}