implement audio tracks backend

app/src/main/java/com/github/libretube/api/obj/PipedStream.kt

@@ -17,5 +17,7 @@ data class PipedStream(
     var indexEnd: Int? = null,
     var width: Int? = null,
     var height: Int? = null,
-    var fps: Int? = null
+    var fps: Int? = null,
+    val audioTrackName: String? = null,
+    val audioTrackId: String? = null
 )

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -1407,6 +1407,10 @@ class PlayerFragment : BaseFragment(), OnlinePlayerOptions {
             .show(childFragmentManager)
     }
 
+    override fun onAudioStreamClicked() {
+        TODO("Not yet implemented")
+    }
+
     override fun onPictureInPictureModeChanged(isInPictureInPictureMode: Boolean) {
         super.onPictureInPictureModeChanged(isInPictureInPictureMode)
         if (isInPictureInPictureMode) {

app/src/main/java/com/github/libretube/ui/interfaces/OnlinePlayerOptions.kt

@@ -4,4 +4,6 @@ interface OnlinePlayerOptions {
     fun onCaptionsClicked()
 
     fun onQualityClicked()
+
+    fun onAudioStreamClicked()
 }

app/src/main/java/com/github/libretube/ui/views/CustomExoPlayerView.kt

@@ -195,6 +195,14 @@ internal class CustomExoPlayerView(
                         playerOptionsInterface?.onQualityClicked()
                     }
                 )
+                items.add(
+                    BottomSheetItem(
+                        context.getString(R.string.audio_track),
+                        R.drawable.ic_audio,
+                    ) {
+                        playerOptionsInterface?.onAudioStreamClicked()
+                    }
+                )
                 items.add(
                     BottomSheetItem(
                         context.getString(R.string.captions),

app/src/main/res/drawable/ic_audio.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?attr/colorControlNormal"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M12,3v9.28c-0.47,-0.17 -0.97,-0.28 -1.5,-0.28C8.01,12 6,14.01 6,16.5S8.01,21 10.5,21c2.31,0 4.2,-1.75 4.45,-4H15V6h4V3h-7z" />
+</vector>

app/src/main/res/values/strings.xml

@@ -370,6 +370,7 @@
     <string name="layout">Layout</string>
     <string name="alternative_player_layout">Alternative player layout</string>
     <string name="alternative_player_layout_summary">Show the related videos as a row above the comments instead of below.</string>
+    <string name="audio_track">Audio track</string>
 
     <!-- Notification channel strings -->
     <string name="download_channel_name">Download Service</string>