feat: implement long press gesture to play videos at 2x speed

CHANGELOG.md

@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Long press gesture to play videos at 2x speed ([#666])
+- 2x speed pill to indicate triggering of 2x playback speed gesture
 
 ## [1.9.1] - 2025-11-25
 ### Changed
@@ -247,6 +250,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#754]: https://github.com/FossifyOrg/Gallery/issues/754
 [#759]: https://github.com/FossifyOrg/Gallery/issues/759
 [#786]: https://github.com/FossifyOrg/Gallery/issues/786
+[#666]: https://github.com/FossifyOrg/Gallery/issues/666
 
 [Unreleased]: https://github.com/FossifyOrg/Gallery/compare/1.9.1...HEAD
 [1.9.1]: https://github.com/FossifyOrg/Gallery/compare/1.9.0...1.9.1

app/src/main/kotlin/org/fossify/gallery/fragments/VideoFragment.kt

@@ -18,6 +18,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.view.WindowManager
 import android.widget.ImageView
+import android.widget.RelativeLayout
 import android.widget.SeekBar
 import android.widget.TextView
 import androidx.appcompat.content.res.AppCompatResources
@@ -66,6 +67,7 @@ import org.fossify.gallery.activities.BaseViewerActivity
 import org.fossify.gallery.activities.VideoActivity
 import org.fossify.gallery.databinding.PagerVideoItemBinding
 import org.fossify.gallery.extensions.config
+import org.fossify.gallery.extensions.getActionBarHeight
 import org.fossify.gallery.extensions.getBottomActionsHeight
 import org.fossify.gallery.extensions.getFormattedDuration
 import org.fossify.gallery.extensions.getFriendlyMessage
@@ -91,6 +93,8 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
     companion object {
         private const val PROGRESS = "progress"
         private const val UPDATE_INTERVAL_MS = 250L
+        private const val TOUCH_HOLD_DURATION_MS = 300L
+        private const val TOUCH_HOLD_SPEED_MULTIPLIER = 2.0f
     }
 
     private var mIsFullscreen = false
@@ -118,6 +122,18 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
     private var mStoredBottomActions = true
     private var mStoredExtendedDetails = 0
     private var mStoredRememberLastVideoPosition = false
+    private var mOriginalPlaybackSpeed = 1f
+    private var mIsLongPressActive = false
+
+    private val mTouchHoldRunnable = Runnable {
+        mView.parent.requestDisallowInterceptTouchEvent(true)
+        // This code runs after the delay, only if the user is still holding down.
+        mIsLongPressActive = true
+        mOriginalPlaybackSpeed = mExoPlayer?.playbackParameters?.speed ?: mConfig.playbackSpeed
+        updatePlaybackSpeed(TOUCH_HOLD_SPEED_MULTIPLIER)
+
+        mPlaybackSpeedPill.fadeIn()
+    }
 
     private lateinit var mTimeHolder: View
     private lateinit var mBrightnessSideScroll: MediaSideScroll
@@ -130,6 +146,7 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
     private lateinit var mCurrTimeView: TextView
     private lateinit var mPlayPauseButton: ImageView
     private lateinit var mSeekBar: SeekBar
+    private lateinit var mPlaybackSpeedPill: TextView
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -170,6 +187,7 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
             }
 
             mSeekBar = bottomVideoTimeHolder.videoSeekbar
+            mPlaybackSpeedPill = playbackSpeedPill
             mSeekBar.setOnSeekBarChangeListener(this@VideoFragment)
             // adding an empty click listener just to avoid ripple animation at toggling fullscreen
             mSeekBar.setOnClickListener { }
@@ -178,6 +196,12 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
             mCurrTimeView = bottomVideoTimeHolder.videoCurrTime
             mBrightnessSideScroll = videoBrightnessController
             mVolumeSideScroll = videoVolumeController
+            mBrightnessSideScroll.onVerticalScroll = {
+                mTimerHandler.removeCallbacks(mTouchHoldRunnable)
+            }
+            mVolumeSideScroll.onVerticalScroll = {
+                mTimerHandler.removeCallbacks(mTouchHoldRunnable)
+            }
             mTextureView = videoSurface
             mTextureView.surfaceTextureListener = this@VideoFragment
 
@@ -215,6 +239,7 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
                 if (videoSurfaceFrame.controller.state.zoom == 1f) {
                     handleEvent(event)
                 }
+                handleTouchHoldEvent(event)
 
                 gestureDetector.onTouchEvent(event)
                 false
@@ -223,6 +248,15 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
 
         ViewCompat.setOnApplyWindowInsetsListener(binding.videoHolder) { _, insets ->
             val system = insets.getInsetsIgnoringVisibility(Type.systemBars())
+
+            val pillTopMargin = system.top + resources.getActionBarHeight(context) +
+                resources.getDimension(org.fossify.commons.R.dimen.normal_margin).toInt()
+            (mPlaybackSpeedPill.layoutParams as? RelativeLayout.LayoutParams)?.apply {
+                setMargins(
+                    0, pillTopMargin, 0, 0
+                )
+            }
+
             binding.bottomActionsDummy.updateLayoutParams<ViewGroup.LayoutParams> {
                 height = resources.getBottomActionsHeight() + system.bottom
             }
@@ -288,7 +322,6 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
                     doubleTap = { x, y ->
                         doSkip(false)
                     })
-
                 mVolumeSideScroll.initialize(
                     activity,
                     slideInfo,
@@ -942,4 +975,24 @@ class VideoFragment : ViewPagerFragment(), TextureView.SurfaceTextureListener,
             mTextureView.layoutParams = this
         }
     }
+
+    private fun handleTouchHoldEvent(event: MotionEvent) {
+        when (event.action) {
+            MotionEvent.ACTION_DOWN -> {
+                if (mIsPlaying) {
+                    mTimerHandler.postDelayed(mTouchHoldRunnable, TOUCH_HOLD_DURATION_MS)
+                }
+            }
+
+            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
+                mTimerHandler.removeCallbacks(mTouchHoldRunnable)
+
+                if (mIsLongPressActive) {
+                    updatePlaybackSpeed(mOriginalPlaybackSpeed)
+                    mIsLongPressActive = false
+                    mPlaybackSpeedPill.fadeOut()
+                }
+            }
+        }
+    }
 }

app/src/main/kotlin/org/fossify/gallery/views/MediaSideScroll.kt

@@ -33,6 +33,7 @@ class MediaSideScroll(context: Context, attrs: AttributeSet) : RelativeLayout(co
 
     private var mSlideInfoText = ""
     private var mSlideInfoFadeHandler = Handler()
+    internal var onVerticalScroll: (() -> Unit)? = null
     private var mParentView: ViewGroup? = null
     private var activity: Activity? = null
     private var doubleTap: ((Float, Float) -> Unit)? = null
@@ -106,6 +107,7 @@ class MediaSideScroll(context: Context, attrs: AttributeSet) : RelativeLayout(co
                 val diffY = mTouchDownY - event.rawY
 
                 if (Math.abs(diffY) > dragThreshold && Math.abs(diffY) > Math.abs(diffX)) {
+                    onVerticalScroll?.invoke()
                     var percent = ((diffY / mViewHeight) * 100).toInt() * 3
                     percent = Math.min(100, Math.max(-100, percent))
 

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#99000000" />
+    <corners android:radius="@dimen/bottom_sheet_corner_radius" />
+
+</shape>

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

@@ -6,6 +6,26 @@
     android:layout_height="match_parent"
     android:layoutDirection="ltr">
 
+    <TextView
+        android:id="@+id/playback_speed_pill"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentTop="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginTop="@dimen/label_start_margin"
+        android:background="@drawable/playback_pill_background"
+        android:elevation="10dp"
+        android:paddingStart="@dimen/list_item_padding_horizontal"
+        android:paddingTop="@dimen/list_item_padding_vertical"
+        android:paddingEnd="@dimen/list_item_padding_horizontal"
+        android:paddingBottom="@dimen/list_item_padding_vertical"
+        android:text="@string/playback_speed_display_text"
+        android:textColor="@android:color/white"
+        android:textSize="@dimen/list_secondary_text_size"
+        android:textStyle="bold"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
     <ImageView
         android:id="@+id/video_preview"
         android:layout_width="match_parent"

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

@@ -292,6 +292,7 @@
     <string name="faq_17_text">That stopped working due to the system changes that came with Android 11 too, the app cannot browse real folders anymore, it relies on the so called MediaStore at fetching data.</string>
     <string name="faq_18_title">Why do I see ads during video playback?</string>
     <string name="faq_18_text">Our apps have no ads whatsoever. If you see them during video playback, you must be using some other apps video player. Try finding your default video player in the device settings, then do a \"Clear defaults\" on it. The next time you invoke some video intent you will see an app picker prompt, where you can select what app you want to use.</string>
+    <string name="playback_speed_display_text">2x >></string>
     <!--
         Haven't found some strings? There's more at
         https://github.com/FossifyOrg/Commons/tree/master/commons/src/main/res