AudioTee Swift CLI repo

2025-06-11 15:33:40 +01:00
commit 4a8bc657e3
26 changed files with 1559 additions and 0 deletions
@@ -0,0 +1,54 @@
+import AudioToolbox
+import CoreAudio
+import Foundation
+
+public class AudioFormatManager {
+  public static func getDeviceFormat(deviceID: AudioObjectID) -> AudioStreamBasicDescription {
+    var propertyAddress = getPropertyAddress(
+      selector: kAudioDevicePropertyStreamFormat,
+      scope: kAudioDevicePropertyScopeInput)
+    var propertySize = UInt32(MemoryLayout<AudioStreamBasicDescription>.stride)
+    var streamFormat = AudioStreamBasicDescription()
+    let status = AudioObjectGetPropertyData(
+      deviceID, &propertyAddress, 0, nil, &propertySize, &streamFormat)
+
+    guard status == noErr else {
+      fatalError("Failed to get stream format: \(status)")
+    }
+
+    return streamFormat
+  }
+
+  static func createMetadata(for format: AudioStreamBasicDescription) -> AudioStreamMetadata {
+    return AudioStreamMetadata(
+      sampleRate: format.mSampleRate,
+      channelsPerFrame: format.mChannelsPerFrame,
+      bitsPerChannel: format.mBitsPerChannel,
+      isFloat: format.mFormatFlags & kAudioFormatFlagIsFloat != 0,
+      captureMode: "audio",
+      deviceName: nil,  // TODO: Get device name if needed
+      deviceUID: nil,  // TODO: Get device UID if needed
+      encoding: format.mFormatFlags & kAudioFormatFlagIsFloat != 0 ? "pcm_f32le" : "pcm_s16le"
+    )
+  }
+
+  public static func writeMetadata(for format: AudioStreamBasicDescription) {
+    let metadata = createMetadata(for: format)
+    Logger.writeMessage(.metadata, data: metadata)
+    Logger.writeMessage(.streamStart, data: Optional<String>.none)
+  }
+
+  public static func logFormatInfo(_ format: AudioStreamBasicDescription) {
+    Logger.debug(
+      "Using device's native format",
+      context: [
+        "channels": String(format.mChannelsPerFrame),
+        "sample_rate": String(format.mSampleRate),
+        "bits_per_channel": String(format.mBitsPerChannel),
+        "format_id": String(format.mFormatID),
+        "format_flags": String(format: "0x%08x", format.mFormatFlags),
+        "bytes_per_frame": String(format.mBytesPerFrame),
+      ]
+    )
+  }
+}