UI for changing playback rate

apple/OmnivoreKit/Sources/App/Views/AudioPlayer/MiniPlayer.swift

@@ -248,14 +248,14 @@ public struct MiniPlayer: View {
 
           HStack {
             Menu {
-              Button("1.0×", action: {})
-              Button("1.2×", action: {})
-              Button("1.5×", action: {})
-              Button("1.7×", action: {})
-              Button("2.0×", action: {})
+              playbackRateButton(rate: 1.0, title: "1.0×", selected: audioController.playbackRate == 1.0)
+              playbackRateButton(rate: 1.2, title: "1.2×", selected: audioController.playbackRate == 1.2)
+              playbackRateButton(rate: 1.5, title: "1.5×", selected: audioController.playbackRate == 1.5)
+              playbackRateButton(rate: 1.7, title: "1.7×", selected: audioController.playbackRate == 1.7)
+              playbackRateButton(rate: 2.0, title: "2.0×", selected: audioController.playbackRate == 2.0)
             } label: {
               VStack {
-                Text("1.0×")
+                Text(String(format: "%.1f×", audioController.playbackRate))
                   .font(.appCallout)
                   .lineLimit(0)
               }
@@ -312,6 +312,22 @@ public struct MiniPlayer: View {
     }
   }
 
+  func playbackRateButton(rate: Double, title: String, selected: Bool) -> some View {
+    Button(action: {
+      audioController.playbackRate = rate
+    }) {
+      HStack {
+        Text(title)
+        Spacer()
+        if selected {
+          Image(systemName: "checkmark")
+        }
+      }
+      .contentShape(Rectangle())
+    }
+    .buttonStyle(PlainButtonStyle())
+  }
+
   public var body: some View {
     ZStack(alignment: .center) {
       presentingView

apple/OmnivoreKit/Sources/Services/AudioSession/AudioController.swift

@@ -10,6 +10,7 @@ import CryptoKit
 import Foundation
 import MediaPlayer
 import Models
+import SwiftUI
 import Utils
 
 public enum AudioControllerState {
@@ -235,6 +236,12 @@ public class AudioController: NSObject, ObservableObject, AVAudioPlayerDelegate,
     }
   }
 
+  @AppStorage(UserDefaultKey.textToSpeechPlaybackRate.rawValue) public var playbackRate = 1.0 {
+    didSet {
+      print("setting textToSpeechPlaybackRate: ", playbackRate)
+    }
+  }
+
   public var currentVoice: String {
     get {
       UserDefaults.standard.string(forKey: Keys.textToSpeechVoice) ?? "en-US-JennyNeural"

apple/OmnivoreKit/Sources/Utils/UserDefaultKeys.swift

@@ -14,4 +14,5 @@ public enum UserDefaultKey: String {
   case lastUsedAppBuildNumber
   case lastItemSyncTime
   case audioInfoAlertShown
+  case textToSpeechPlaybackRate
 }