Update Ghostgram features

submodules/WatchBridgeAudio/Sources/LegacyBridgeAudio.swift

@@ -0,0 +1,25 @@
+import Foundation
+import SwiftSignalKit
+import WatchBridgeAudioImpl
+
+public func legacyDecodeOpusAudio(path: String, outputPath: String) -> Signal<String, NoError> {
+    return Signal { subscriber in
+        let decoder = TGBridgeAudioDecoder(url: URL(fileURLWithPath: path), outputUrl: URL(fileURLWithPath: outputPath))
+        decoder?.start(completion: {
+            subscriber.putNext(outputPath)
+            subscriber.putCompletion()
+        })
+        return EmptyDisposable
+    }
+}
+
+public func legacyEncodeOpusAudio(path: String) -> Signal<(String?, Int32), NoError> {
+    return Signal { subscriber in
+        let encoder = TGBridgeAudioEncoder(url: URL(fileURLWithPath: path))
+        encoder?.start(completion: { (path, duration) in
+            subscriber.putNext((path, duration))
+            subscriber.putCompletion()
+        })
+        return EmptyDisposable
+    }
+}