feat: Add hold-to-fast-forward (2x speed) feature

- Add tap and hold gesture to increase playback speed to 2x while held
- Add settings toggle in Video & Audio settings to enable/disable the feature
- Add visual indicator overlay showing '2x Speed' when feature is active
- Feature is enabled by default and respects user preference

app/src/main/java/org/schabi/newpipe/player/gesture/BasePlayerGestureListener.kt

@@ -9,6 +9,7 @@ import android.view.View
 import androidx.core.os.postDelayed
 import org.schabi.newpipe.databinding.PlayerBinding
 import org.schabi.newpipe.player.Player
+import org.schabi.newpipe.player.helper.PlayerHelper
 import org.schabi.newpipe.player.ui.VideoPlayerUi
 
 /**
@@ -24,11 +25,87 @@ abstract class BasePlayerGestureListener(
     protected val player: Player = playerUi.player
     protected val binding: PlayerBinding = playerUi.binding
 
+    // ///////////////////////////////////////////////////////////////////
+    // Hold to fast forward (2x speed)
+    // ///////////////////////////////////////////////////////////////////
+
+    private var isHoldingForFastForward = false
+    private var originalPlaybackSpeed = 1.0f
+    private val fastForwardSpeed = 2.0f
+
     override fun onTouch(v: View, event: MotionEvent): Boolean {
         playerUi.gestureDetector.onTouchEvent(event)
+
+        // Handle touch up to restore original speed when hold-to-fast-forward is active
+        if (event.action == MotionEvent.ACTION_UP || event.action == MotionEvent.ACTION_CANCEL) {
+            if (isHoldingForFastForward) {
+                stopHoldToFastForward()
+            }
+        }
+
         return false
     }
 
+    override fun onLongPress(e: MotionEvent) {
+        if (DEBUG) {
+            Log.d(TAG, "onLongPress called with e = [$e]")
+        }
+
+        // Check if hold-to-fast-forward is enabled in settings
+        if (!PlayerHelper.isHoldToFastForwardEnabled(player.context)) {
+            return
+        }
+
+        // Only activate if player is playing and not in a popup menu
+        if (player.currentState != Player.STATE_PLAYING || playerUi.isSomePopupMenuVisible) {
+            return
+        }
+
+        // Don't activate during double tap mode
+        if (isDoubleTapping) {
+            return
+        }
+
+        startHoldToFastForward()
+    }
+
+    private fun startHoldToFastForward() {
+        if (isHoldingForFastForward) {
+            return
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "startHoldToFastForward: activating 2x speed")
+        }
+
+        isHoldingForFastForward = true
+        originalPlaybackSpeed = player.playbackSpeed
+
+        // Set playback speed to 2x
+        player.setPlaybackSpeed(fastForwardSpeed)
+
+        // Show visual feedback
+        playerUi.onHoldToFastForwardStart()
+    }
+
+    private fun stopHoldToFastForward() {
+        if (!isHoldingForFastForward) {
+            return
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "stopHoldToFastForward: restoring original speed $originalPlaybackSpeed")
+        }
+
+        isHoldingForFastForward = false
+
+        // Restore original playback speed
+        player.setPlaybackSpeed(originalPlaybackSpeed)
+
+        // Hide visual feedback
+        playerUi.onHoldToFastForwardEnd()
+    }
+
     private fun onDoubleTap(
         event: MotionEvent,
         portion: DisplayPortion

app/src/main/java/org/schabi/newpipe/player/helper/PlayerHelper.java

@@ -231,6 +231,11 @@ public final class PlayerHelper {
                 .getBoolean(context.getString(R.string.auto_queue_key), false);
     }
 
+    public static boolean isHoldToFastForwardEnabled(@NonNull final Context context) {
+        return getPreferences(context)
+                .getBoolean(context.getString(R.string.hold_to_fast_forward_key), true);
+    }
+
     public static boolean isClearingQueueConfirmationRequired(@NonNull final Context context) {
         return getPreferences(context)
                 .getBoolean(context.getString(R.string.clear_queue_confirmation_key), false);

app/src/main/java/org/schabi/newpipe/player/ui/VideoPlayerUi.java

@@ -441,6 +441,33 @@ public abstract class VideoPlayerUi extends PlayerUi implements SeekBar.OnSeekBa
     //endregion
 
 
+    /*//////////////////////////////////////////////////////////////////////////
+    // Hold to fast forward
+    //////////////////////////////////////////////////////////////////////////*/
+    //region Hold to fast forward
+
+    /**
+     * Called when hold-to-fast-forward is activated (long press detected).
+     * Shows the visual indicator overlay.
+     */
+    public void onHoldToFastForwardStart() {
+        animate(binding.holdToFastForwardOverlay, true, DEFAULT_CONTROLS_DURATION);
+        // Hide controls while fast forwarding
+        if (isControlsVisible()) {
+            hideControls(DEFAULT_CONTROLS_DURATION, 0);
+        }
+    }
+
+    /**
+     * Called when hold-to-fast-forward is deactivated (finger released).
+     * Hides the visual indicator overlay.
+     */
+    public void onHoldToFastForwardEnd() {
+        animate(binding.holdToFastForwardOverlay, false, DEFAULT_CONTROLS_DURATION);
+    }
+    //endregion
+
+
     /*//////////////////////////////////////////////////////////////////////////
     // Broadcast receiver
     //////////////////////////////////////////////////////////////////////////*/

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="@color/defaultIconTint"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M4,18l8.5,-6L4,6v12zM13,6v12l8.5,-6L13,6z" />
+</vector>

app/src/main/res/layout/player.xml

@@ -809,4 +809,40 @@
         android:alpha="0"
         android:visibility="invisible" /> <!-- Required for the first appearance fading correctly -->
 
+    <!-- Hold to fast forward indicator -->
+    <LinearLayout
+        android:id="@+id/holdToFastForwardOverlay"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:layout_marginTop="80dp"
+        android:background="@drawable/background_oval_black_transparent"
+        android:gravity="center"
+        android:orientation="horizontal"
+        android:paddingStart="20dp"
+        android:paddingTop="12dp"
+        android:paddingEnd="20dp"
+        android:paddingBottom="12dp"
+        android:visibility="gone"
+        tools:visibility="visible">
+
+        <androidx.appcompat.widget.AppCompatImageView
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:layout_marginEnd="8dp"
+            android:src="@drawable/ic_fast_forward"
+            app:tint="@color/white"
+            tools:ignore="ContentDescription" />
+
+        <org.schabi.newpipe.views.NewPipeTextView
+            android:id="@+id/holdToFastForwardText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/hold_to_fast_forward_indicator"
+            android:textColor="@android:color/white"
+            android:textSize="16sp"
+            android:textStyle="bold" />
+
+    </LinearLayout>
+
 </RelativeLayout>

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

@@ -25,6 +25,8 @@
     <string name="clear_queue_confirmation_key">clear_queue_confirmation_key</string>
     <string name="ignore_hardware_media_buttons_key">ignore_hardware_media_buttons_key</string>
 
+    <string name="hold_to_fast_forward_key">hold_to_fast_forward_key</string>
+
     <string name="popup_saved_width_key">popup_saved_width</string>
     <string name="popup_saved_x_key">popup_saved_x</string>
     <string name="popup_saved_y_key">popup_saved_y</string>

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

@@ -91,6 +91,9 @@
     <string name="clear_queue_confirmation_description">The active player queue will be replaced</string>
     <string name="ignore_hardware_media_buttons_title">Ignore hardware media button events</string>
     <string name="ignore_hardware_media_buttons_summary">Useful, for instance, if you are using a headset with broken physical buttons</string>
+    <string name="hold_to_fast_forward_title">Hold to fast forward</string>
+    <string name="hold_to_fast_forward_summary">Tap and hold on the video to play at 2x speed while held</string>
+    <string name="hold_to_fast_forward_indicator">2x Speed</string>
     <string name="show_comments_title">Show comments</string>
     <string name="show_comments_summary">Turn off to hide comments</string>
     <string name="show_next_and_similar_title">Show \'Next\' and \'Similar\' videos</string>

app/src/main/res/xml/video_audio_settings.xml

@@ -249,5 +249,13 @@
             android:title="@string/ignore_hardware_media_buttons_title"
             app:singleLineTitle="false"
             app:iconSpaceReserved="false" />
+
+        <SwitchPreferenceCompat
+            android:defaultValue="true"
+            android:key="@string/hold_to_fast_forward_key"
+            android:summary="@string/hold_to_fast_forward_summary"
+            android:title="@string/hold_to_fast_forward_title"
+            app:singleLineTitle="false"
+            app:iconSpaceReserved="false" />
     </PreferenceCategory>
 </PreferenceScreen>