library improvements

Sources/AudioTeeCLI/BinaryOutputHandler.swift

@@ -0,0 +1,32 @@
+import AudioTeeCore
+import Foundation
+
+/// CLI-specific output handler that writes raw PCM audio to stdout
+/// and lifecycle messages to stderr via the logger.
+class BinaryAudioOutputHandler: AudioOutputHandler {
+  private let flushAfterWrite: Bool
+
+  init(flushAfterWrite: Bool = false) {
+    self.flushAfterWrite = flushAfterWrite
+  }
+
+  func handleAudioPacket(_ packet: AudioPacket) {
+    // Write raw binary audio data directly to stdout
+    FileHandle.standardOutput.write(packet.data)
+    if flushAfterWrite {
+      fflush(stdout)
+    }
+  }
+
+  func handleMetadata(_ metadata: AudioStreamMetadata) {
+    AudioTeeLogging.logger.writeMessage(.metadata, data: metadata)
+  }
+
+  func handleStreamStart() {
+    AudioTeeLogging.logger.writeMessage(.streamStart, data: Optional<String>.none)
+  }
+
+  func handleStreamStop() {
+    AudioTeeLogging.logger.writeMessage(.streamStop, data: Optional<String>.none)
+  }
+}