Update whisper.cpp to latest version, use new progress callback

Sources/SwiftWhisper/Whisper.swift

@@ -40,6 +40,7 @@ public class Whisper {
         self.unmanagedSelf = unmanagedSelf
         params.new_segment_callback_user_data = unmanagedSelf.toOpaque()
         params.encoder_begin_callback_user_data = unmanagedSelf.toOpaque()
+        params.progress_callback_user_data = unmanagedSelf.toOpaque()
 
         // swiftlint:disable line_length
         params.new_segment_callback = { (ctx: OpaquePointer?, _: OpaquePointer?, newSegmentCount: Int32, userData: UnsafeMutableRawPointer?) in
@@ -66,17 +67,6 @@ public class Whisper {
                 ))
             }
 
-            if let frameCount = whisper.frameCount,
-               let lastSegmentTime = newSegments.last?.endTime {
-
-                let fileLength = Double(frameCount * 1000) / Double(WHISPER_SAMPLE_RATE)
-                let progress = Double(lastSegmentTime) / Double(fileLength)
-
-                DispatchQueue.main.async {
-                    delegate.whisper(whisper, didUpdateProgress: progress)
-                }
-            }
-
             DispatchQueue.main.async {
                 delegate.whisper(whisper, didProcessNewSegments: newSegments, atIndex: Int(startIndex))
             }
@@ -92,6 +82,15 @@ public class Whisper {
 
             return true
         }
+
+        params.progress_callback = { (_: OpaquePointer?, _: OpaquePointer?, progress: Int32, userData: UnsafeMutableRawPointer?) in
+            guard let userData else { return }
+            let whisper = Unmanaged<Whisper>.fromOpaque(userData).takeUnretainedValue()
+
+            DispatchQueue.main.async {
+                whisper.delegate?.whisper(whisper, didUpdateProgress: Double(progress) / 100)
+            }
+        }
     }
 
     private func cleanupCallbacks() {