Refactored channel count determination to new ChannelFormat channelCount property

Author: orchetect

Sources/SwiftAudioFileConverter/AudioFileConverter/AudioFileConverter+ExtAudioFile.swift

@@ -47,7 +47,7 @@ extension AudioFileConverter {
 
         // 4. We’ll set a “client format” to read and write in a consistent format (e.g., float32 PCM).
         //    Even for compressed output like AAC, we often use a PCM client format for reading/writing.
-        let channels = (settings.channelFormat == .mono) ? UInt32(1) : UInt32(2)
+        let channels = UInt32(settings.channelFormat.channelCount)
 
         var clientFormat = AudioStreamBasicDescription(
             mSampleRate: settings.sampleRate.hzDouble,
@@ -125,7 +125,7 @@ extension AudioFileConverter {
     nonisolated private static func audioFormat(
         for settings: Settings
     ) throws -> (AudioStreamBasicDescription, AudioFileTypeID) {
-        let channels = (settings.channelFormat == .mono) ? UInt32(1) : UInt32(2)
+        let channels = UInt32(settings.channelFormat.channelCount)
 
         // Base description; we’ll adjust for each format
         var asbd = AudioStreamBasicDescription()

Sources/SwiftAudioFileConverter/AudioFileConverter/AudioFileConverter+FLAC.swift

@@ -27,7 +27,7 @@ extension AudioFileConverter {
         defer { ExtAudioFileDispose(inputFile) }
 
         // 2) Decide on channels from settings
-        let channels: UInt32 = (settings.channelFormat == .mono) ? 1 : 2
+        let channels = UInt32(settings.channelFormat.channelCount)
 
         // 3) We want 16-bit interleaved PCM from ExtAudioFile
         //    because FLAC expects integer samples

Sources/SwiftAudioFileConverter/AudioFileConverter/AudioFileConverter+LAME.swift

@@ -27,7 +27,7 @@ extension AudioFileConverter {
         }
 
         // 2) Determine the number of channels from AudioFileSettings
-        let channels = (settings.channelFormat == .mono) ? UInt32(1) : UInt32(2)
+        let channels = UInt32(settings.channelFormat.channelCount)
 
         // 3) We want 32-bit float interleaved PCM for reading from ExtAudioFile
         //    Build a client format describing float PCM.

Sources/SwiftAudioFileConverter/AudioFileConverter/Settings/ChannelFormat.swift

@@ -32,3 +32,16 @@ extension AudioFileConverter.ChannelFormat: CustomStringConvertible {
         }
     }
 }
+
+// MARK: - Properties
+
+extension AudioFileConverter.ChannelFormat {
+    public var channelCount: Int {
+        switch self {
+        case .mono:
+            1
+        case .stereo:
+            2
+        }
+    }
+}