Option to manage Playback Speed ​​of Audio and Video Mode Separately

app/src/main/java/com/github/libretube/constants/PreferenceKeys.kt

@@ -56,7 +56,9 @@ object PreferenceKeys {
     const val AUTO_FULLSCREEN = "auto_fullscreen"
     const val AUTO_PLAY = "autoplay"
     const val RELATED_STREAMS = "related_streams_toggle"
+    const val CUSTOM_PLAYBACK_SPEED = "custom_playback_speed"
     const val PLAYBACK_SPEED = "playback_speed"
+    const val BACKGROUND_PLAYBACK_SPEED = "background_playback_speed"
     const val FULLSCREEN_ORIENTATION = "fullscreen_orientation"
     const val PAUSE_ON_SCREEN_OFF = "pause_screen_off"
     const val WATCH_POSITIONS = "watch_positions"

app/src/main/java/com/github/libretube/helpers/PlayerHelper.kt

@@ -282,11 +282,17 @@ object PlayerHelper {
             .roundToInt()
             .toLong() * 1000
 
-    private val playbackSpeed: String
+    private val playbackSpeed: Float
         get() = PreferenceHelper.getString(
             PreferenceKeys.PLAYBACK_SPEED,
             "1"
-        ).replace("F", "")
+        ).replace("F", "").toFloat()
+
+    private val backgroundSpeed: Float
+        get() = when (PreferenceHelper.getBoolean(PreferenceKeys.CUSTOM_PLAYBACK_SPEED, false)) {
+            true -> PreferenceHelper.getString(PreferenceKeys.BACKGROUND_PLAYBACK_SPEED, "1").toFloat()
+            else -> playbackSpeed
+        }
 
     val resizeModePref: String
         get() = PreferenceHelper.getString(
@@ -470,12 +476,10 @@ object PlayerHelper {
     /**
      * Load playback parameters such as speed and skip silence
      */
-    fun ExoPlayer.loadPlaybackParams(): ExoPlayer {
+    fun ExoPlayer.loadPlaybackParams(isBackgroundMode: Boolean = false): ExoPlayer {
         skipSilenceEnabled = skipSilence
-        playbackParameters = PlaybackParameters(
-            playbackSpeed.toFloat(),
-            1.0f
-        )
+        val speed = if (isBackgroundMode) backgroundSpeed else playbackSpeed
+        playbackParameters = PlaybackParameters(speed, 1.0f)
         return this
     }
 

app/src/main/java/com/github/libretube/services/BackgroundMode.kt

@@ -239,7 +239,7 @@ class BackgroundMode : LifecycleService() {
             .setAudioAttributes(PlayerHelper.getAudioAttributes(), true)
             .setLoadControl(PlayerHelper.getLoadControl())
             .build()
-            .loadPlaybackParams()
+            .loadPlaybackParams(isBackgroundMode = true)
 
         /**
          * Listens for changed playbackStates (e.g. pause, end)

app/src/main/java/com/github/libretube/ui/preferences/PlayerSettings.kt

@@ -15,6 +15,7 @@ import com.github.libretube.constants.PreferenceKeys
 import com.github.libretube.helpers.LocaleHelper
 import com.github.libretube.helpers.PreferenceHelper
 import com.github.libretube.ui.base.BasePreferenceFragment
+import com.github.libretube.ui.views.SliderPreference
 
 class PlayerSettings : BasePreferenceFragment() {
     override val titleResourceId: Int = R.string.player
@@ -70,6 +71,19 @@ class PlayerSettings : BasePreferenceFragment() {
             pauseOnQuit?.isVisible = !(newValue as Boolean)
             true
         }
+
+        val customBackgroundSpeed = findPreference<SwitchPreferenceCompat>(
+            PreferenceKeys.CUSTOM_PLAYBACK_SPEED
+        )
+        val backgroundSpeed = findPreference<SliderPreference>(
+            PreferenceKeys.BACKGROUND_PLAYBACK_SPEED
+        )
+        backgroundSpeed?.isEnabled = customBackgroundSpeed?.isChecked == true
+
+        customBackgroundSpeed?.setOnPreferenceChangeListener { _, newValue ->
+            backgroundSpeed?.isEnabled = newValue as Boolean
+            true
+        }
     }
 
     private fun setupSubtitlePref(preference: ListPreference) {

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

@@ -441,6 +441,8 @@
     <string name="faq">FAQ</string>
     <string name="codecs">Codecs</string>
     <string name="mark_as_watched">Mark as watched</string>
+    <string name="custom_playback_speed">Custom speed</string>
+    <string name="custom_playback_speed_summary">Use a different playback speed than for the normal player.</string>
     <!-- Notification channel strings -->
     <string name="download_channel_name">Download Service</string>
     <string name="download_channel_description">Shows a notification when downloading media.</string>

app/src/main/res/xml/player_settings.xml

@@ -161,6 +161,26 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory app:title="@string/background_mode">
+
+        <SwitchPreferenceCompat
+            app:defaultValue="false"
+            app:key="custom_playback_speed"
+            app:title="@string/custom_playback_speed"
+            android:summary="@string/custom_playback_speed_summary"
+            android:icon="@drawable/ic_headphones" />
+
+        <com.github.libretube.ui.views.SliderPreference
+            android:icon="@drawable/ic_speed"
+            app:defValue="1.0"
+            app:key="background_playback_speed"
+            app:stepSize="0.1"
+            app:title="@string/playback_speed"
+            app:valueFrom="0.2"
+            app:valueTo="4.0" />
+
+    </PreferenceCategory>
+
     <PreferenceCategory app:title="@string/misc">
 
         <SwitchPreferenceCompat