Addressing code-rabbit comments

Signed-off-by: Lance Chant <13349722+lancechant@users.noreply.github.com>

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/MpvPlayerView.kt

@@ -2,14 +2,12 @@ package expo.modules.mpvplayer
 
 import android.content.Context
 import android.graphics.Color
-import android.graphics.Rect
-import android.graphics.SurfaceTexture
 import android.os.Handler
 import android.os.Looper
 import android.util.Log
 import android.view.Surface
-import android.view.TextureView
-import android.view.View
+import android.view.SurfaceHolder
+import android.view.SurfaceView
 import android.view.ViewGroup
 import expo.modules.kotlin.AppContext
 import expo.modules.kotlin.viewevent.EventDispatcher
@@ -30,15 +28,26 @@ data class VideoLoadConfig(
     val cacheEnabled: String? = null,
     val cacheSeconds: Int? = null,
     val demuxerMaxBytes: Int? = null,
-    val demuxerMaxBackBytes: Int? = null
+    val demuxerMaxBackBytes: Int? = null,
 )
 
 /**
  * MpvPlayerView - ExpoView that hosts the MPV player.
- * Uses TextureView for reliable Picture-in-Picture support.
+ *
+ * Uses SurfaceView (not TextureView) so the surface routes directly to
+ * SurfaceFlinger (the OS compositor) rather than compositing into the
+ * app's window surface. This matches mpv-android's architecture and
+ * gives mpv a standalone surface.
+ *
+ * PiP black-screen mitigation: SurfaceView's surface is destroyed and
+ * recreated on PiP entry/exit, and the new surface's initial dimensions
+ * can be stale until the next layout pass. We push dimension updates to
+ * mpv via both SurfaceHolder.Callback.surfaceChanged AND an
+ * OnLayoutChangeListener, so the PiP transition (which fires layout
+ * passes on the view itself) reaches mpv promptly.
  */
 class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context, appContext),
-    MPVLayerRenderer.Delegate, TextureView.SurfaceTextureListener {
+    MPVLayerRenderer.Delegate, SurfaceHolder.Callback {
 
     companion object {
         private const val TAG = "MpvPlayerView"
@@ -52,7 +61,7 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
     val onTracksReady by EventDispatcher()
     val onPictureInPictureChange by EventDispatcher()
 
-    private var textureView: TextureView
+    private var surfaceView: SurfaceView
     private var renderer: MPVLayerRenderer? = null
     private var pipController: PiPController? = null
 
@@ -63,31 +72,45 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
     private var surfaceReady: Boolean = false
     private var pendingConfig: VideoLoadConfig? = null
     private var rendererStarted: Boolean = false
-    private var pendingSurface: Surface? = null
     private var activeSurface: Surface? = null
-    private var surfaceTexture: SurfaceTexture? = null
 
     // PiP state tracking
-    private var isWaitingForPiPTransition: Boolean = false
-    private var isPiPSurfaceForced: Boolean = false
     private val pipHandler = Handler(Looper.getMainLooper())
 
     init {
         setBackgroundColor(Color.BLACK)
 
-        // Create TextureView for video rendering (composites into app window for PiP support)
-        textureView = TextureView(context).apply {
+        // SurfaceView for video rendering. Routes the surface directly to
+        // SurfaceFlinger (the OS compositor), giving mpv a standalone
+        // surface. TextureView composites into the app's window surface
+        // which is less efficient and breaks PiP transitions.
+        surfaceView = SurfaceView(context).apply {
             layoutParams = ViewGroup.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT,
                 ViewGroup.LayoutParams.MATCH_PARENT
             )
-            surfaceTextureListener = this@MpvPlayerView
         }
-        addView(textureView)
+        surfaceView.holder.addCallback(this@MpvPlayerView)
+        addView(surfaceView)
+
+        // Push dimension updates to mpv on every view bounds change. This
+        // is the primary PiP black-screen fix: entering PiP fires a layout
+        // pass on the SurfaceView itself, and we proactively tell mpv the
+        // new size so it resizes its EGL swapchain before rendering.
+        surfaceView.addOnLayoutChangeListener { _, left, top, right, bottom,
+                                                  oldLeft, oldTop, oldRight, oldBottom ->
+            val w = right - left
+            val h = bottom - top
+            val oldW = oldRight - oldLeft
+            val oldH = oldBottom - oldTop
+            if (w > 0 && h > 0 && (w != oldW || h != oldH)) {
+                renderer?.updateSurfaceSize(w, h)
+            }
+        }
 
         // Initialize PiP controller with Expo's AppContext for proper activity access
         pipController = PiPController(context, appContext)
-        pipController?.setPlayerView(textureView)
+        pipController?.setPlayerView(surfaceView)
         pipController?.delegate = object : PiPController.Delegate {
             override fun onPlay() {
                 play()
@@ -103,17 +126,17 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
 
             override fun onPictureInPictureModeChanged(isInPiP: Boolean) {
                 if (isInPiP) {
-                    if (!isWaitingForPiPTransition) {
-                        isWaitingForPiPTransition = true
-                        pipHandler.removeCallbacksAndMessages(null)
-                        for (delay in longArrayOf(500, 1000, 1500, 2000)) {
-                            pipHandler.postDelayed({ forcePiPBufferSize() }, delay)
-                        }
-                    }
-                } else {
-                    isWaitingForPiPTransition = false
+                    // Post size syncs after the PiP layout settles. Two passes
+                    // catch both the immediate surface re-attach and the
+                    // post-animation layout pass. Replaces the old TextureView
+                    // measure/layout polling hack (forcePiPBufferSize).
                     pipHandler.removeCallbacksAndMessages(null)
-                    restoreFromPiP()
+                    pipHandler.postDelayed({ syncSurfaceSizeToView() }, 100)
+                    pipHandler.postDelayed({ syncSurfaceSizeToView() }, 500)
+                } else {
+                    // Restore from PiP: surface resized back to fullscreen.
+                    pipHandler.removeCallbacksAndMessages(null)
+                    pipHandler.postDelayed({ syncSurfaceSizeToView() }, 100)
                 }
                 onPictureInPictureChange(mapOf("isActive" to isInPiP))
             }
@@ -126,7 +149,7 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
 
     /**
      * Start the renderer with the given VO driver.
-     * Called lazily on first loadVideo so the voDriver setting is available.
+     * Called lazily on first loadVideo so user settings are available.
      */
     private fun ensureRendererStarted(voDriver: String?) {
         if (rendererStarted) return
@@ -135,10 +158,14 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
             renderer?.start(voDriver ?: "gpu-next")
             rendererStarted = true
 
-            pendingSurface?.let { surface ->
+            // If the surface is already alive (surfaceCreated fired before
+            // loadVideo), attach it now. With SurfaceView the surface is
+            // owned by the holder, so we read it from there directly rather
+            // than stashing it on the side.
+            surfaceView.holder.surface?.takeIf { it.isValid }?.let { surface ->
                 activeSurface = surface
                 renderer?.attachSurface(surface)
-                pendingSurface = null
+                syncSurfaceSizeToView()
             }
         } catch (e: Exception) {
             Log.e(TAG, "Failed to start renderer: ${e.message}")
@@ -146,23 +173,20 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
         }
     }
 
-    // MARK: - TextureView.SurfaceTextureListener
+    // MARK: - SurfaceHolder.Callback
 
-    override fun onSurfaceTextureAvailable(surfaceTexture: SurfaceTexture, width: Int, height: Int) {
-        this.surfaceTexture = surfaceTexture
-        val surface = Surface(surfaceTexture)
-        surfaceTexture.setDefaultBufferSize(width, height)
+    override fun surfaceCreated(holder: SurfaceHolder) {
+        val surface = holder.surface
         surfaceReady = true
 
         if (rendererStarted) {
-            // Release the previous wrapper Surface before losing the only
-            // reference to it. cleanup() only runs on detach, so without this
-            // repeated PiP/background/resize cycles leak native surface objects.
-            activeSurface?.release()
+            // The previous Surface reference is holder-owned; do NOT release
+            // it (SurfaceView manages its lifecycle). Just track the new one.
             activeSurface = surface
             renderer?.attachSurface(surface)
-        } else {
-            pendingSurface = surface
+            // Push the actual view dimensions immediately so mpv doesn't
+            // render against stale full-screen geometry during PiP transitions.
+            syncSurfaceSizeToView()
         }
 
         // If we have a pending load, execute it now
@@ -173,20 +197,36 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
         }
     }
 
-    override fun onSurfaceTextureSizeChanged(surfaceTexture: SurfaceTexture, width: Int, height: Int) {
-        surfaceTexture.setDefaultBufferSize(width, height)
-        renderer?.updateSurfaceSize(width, height)
+    override fun surfaceChanged(holder: SurfaceHolder, format: Int, width: Int, height: Int) {
+        if (width > 0 && height > 0) {
+            renderer?.updateSurfaceSize(width, height)
+        }
     }
 
-    override fun onSurfaceTextureDestroyed(surfaceTexture: SurfaceTexture): Boolean {
-        this.surfaceTexture = null
+    override fun surfaceDestroyed(holder: SurfaceHolder) {
         surfaceReady = false
         renderer?.detachSurface()
-        return false // mpv manages the SurfaceTexture
+        // Do NOT issue mpv "stop" here. Playback continues against the
+        // demuxer; when surfaceCreated fires again (PiP entry/exit, app
+        // background/foreground), we re-attach and frames resume. This
+        // matches the keep-open=always setting in MPVLayerRenderer.
+        //
+        // Do NOT release activeSurface — SurfaceView owns it via the holder.
+        activeSurface = null
     }
 
-    override fun onSurfaceTextureUpdated(surfaceTexture: SurfaceTexture) {
-        // Called every frame — no action needed, mpv drives rendering directly
+    /**
+     * Read the actual SurfaceView width/height and push them to mpv.
+     * The PiP transition can fire surfaceCreated before the view's layout
+     * has settled to PiP dimensions, so we re-sync after layout passes.
+     */
+    private fun syncSurfaceSizeToView() {
+        if (!surfaceReady) return
+        val w = surfaceView.width
+        val h = surfaceView.height
+        if (w > 0 && h > 0) {
+            renderer?.updateSurfaceSize(w, h)
+        }
     }
 
     // MARK: - Video Loading
@@ -275,7 +315,7 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
 
         // Reset view-level state so a subsequent loadVideo() on the SAME view
         // instance re-creates the mpv handle and re-attaches the still-live
-        // TextureView surface. Without this, rendererStarted stays true and
+        // SurfaceView surface. Without this, rendererStarted stays true and
         // ensureRendererStarted() early-returns, so renderer.start() is never
         // called again — but stop() already nulled the renderer's mpv handle.
         // The next loadVideo() then runs loadVideoInternal() -> renderer.load()
@@ -286,13 +326,12 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
         // which call destroy() immediately before router.replace() to the
         // same route — Expo Router reuses the same MpvPlayerView instance,
         // so the next source load happens on this view without a remount.
+        //
+        // SurfaceView note: the surface is owned by the holder and survives
+        // across destroy()/loadVideo() on the same view instance. The next
+        // ensureRendererStarted() reads it from surfaceView.holder.surface.
         rendererStarted = false
         currentUrl = null
-        // Move the active surface back to pending so ensureRendererStarted()
-        // re-attaches it to the freshly created mpv instance on next load.
-        // The Surface itself is still valid — onSurfaceTextureDestroyed has
-        // not fired because the TextureView is not being unmounted.
-        activeSurface?.let { pendingSurface = it }
         activeSurface = null
     }
 
@@ -327,59 +366,10 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
     // MARK: - Picture in Picture
 
     fun startPictureInPicture() {
-        isWaitingForPiPTransition = true
         pipController?.startPictureInPicture()
-
-        // Resize buffer to match PiP window after animation settles
-        pipHandler.removeCallbacksAndMessages(null)
-        for (delay in longArrayOf(500, 1000, 1500, 2000)) {
-            pipHandler.postDelayed({ forcePiPBufferSize() }, delay)
-        }
-    }
-
-    /**
-     * Resize the SurfaceTexture buffer AND TextureView layout to match the PiP
-     * visible rect so mpv renders at the PiP window's actual dimensions.
-     */
-    private fun forcePiPBufferSize() {
-        if (!isWaitingForPiPTransition || !surfaceReady) return
-
-        val rect = Rect()
-        textureView.getGlobalVisibleRect(rect)
-        val visW = rect.width()
-        val visH = rect.height()
-        val vw = textureView.width
-        val vh = textureView.height
-
-        if (visW <= 0 || visH <= 0 || (vw == visW && vh == visH)) return
-
-        surfaceTexture?.setDefaultBufferSize(visW, visH)
-        renderer?.updateSurfaceSize(visW, visH)
-
-        // Force TextureView layout to match PiP visible area.
-        // layoutParams alone doesn't work during PiP because the parent
-        // never re-lays out its children.
-        textureView.measure(
-            View.MeasureSpec.makeMeasureSpec(visW, View.MeasureSpec.EXACTLY),
-            View.MeasureSpec.makeMeasureSpec(visH, View.MeasureSpec.EXACTLY)
-        )
-        textureView.layout(0, 0, visW, visH)
-        isPiPSurfaceForced = true
-    }
-
-    private fun restoreFromPiP() {
-        if (!isPiPSurfaceForced) return
-        isPiPSurfaceForced = false
-
-        val lp = textureView.layoutParams
-        lp.width = ViewGroup.LayoutParams.MATCH_PARENT
-        lp.height = ViewGroup.LayoutParams.MATCH_PARENT
-        textureView.layoutParams = lp
-        textureView.requestLayout()
     }
 
     fun stopPictureInPicture() {
-        isWaitingForPiPTransition = false
         pipHandler.removeCallbacksAndMessages(null)
         pipController?.stopPictureInPicture()
     }
@@ -547,20 +537,12 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
      * off the JS path.
      */
     fun cleanup() {
-        isWaitingForPiPTransition = false
         pipHandler.removeCallbacksAndMessages(null)
         pipController?.stopPictureInPicture()
         renderer?.stop()
         renderer?.delegate = null
 
-        // Release the Surface that wraps the SurfaceTexture. These Surface
-        // objects are created in onSurfaceTextureAvailable and were never
-        // released; each playback session previously leaked one. The
-        // SurfaceTexture itself is owned by TextureView and released by it
-        // via onSurfaceTextureDestroyed, so we leave it alone.
-        pendingSurface?.release()
-        pendingSurface = null
-        activeSurface?.release()
+        // SurfaceView owns the Surface via its holder — do NOT release it.
         activeSurface = null
         surfaceReady = false
         currentUrl = null

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/PiPController.kt

@@ -44,6 +44,11 @@ class PiPController(private val context: Context, private val appContext: AppCon
     private var currentPosition: Double = 0.0
     private var currentDuration: Double = 0.0
     private var playbackRate: Double = 1.0
+    // Independently tracks whether the system should auto-enter PiP on home
+    // press. Decoupled from playbackRate so that disabling auto-enter
+    // (e.g. when the player unmounts) doesn't corrupt the play/pause icon
+    // state that buildPiPActions() derives from playbackRate.
+    private var autoEnterEnabled: Boolean = false
 
     private var videoWidth: Int = 0
     private var videoHeight: Int = 0
@@ -106,15 +111,37 @@ class PiPController(private val context: Context, private val appContext: AppCon
     }
 
     fun stopPictureInPicture() {
+        // Disable auto-enter eligibility without touching playbackRate.
+        // playbackRate drives the play/pause icon in buildPiPActions();
+        // mutating it here would cause a stale icon if PiP is re-entered
+        // before the next playback state callback corrects it.
+        autoEnterEnabled = false
         isInPiPMode = false
         pipEntryNotified = false
         unregisterLifecycleCallbacks()
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            val activity = getActivity()
-            if (activity?.isInPictureInPictureMode == true) {
-                activity.moveTaskToBack(false)
+
+        val activity = getActivity() ?: return
+
+        // Push minimal params with just auto-enter disabled. Do NOT call
+        // buildPiPParams() — it calls ensurePiPReceiverRegistered() and
+        // setActions(), which would re-register the broadcast receiver
+        // (just unregistered above) and attach play/pause/skip actions to
+        // params being torn down. That leaves a live receiver + stale
+        // actions after the player has unmounted.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            try {
+                activity.setPictureInPictureParams(
+                    PictureInPictureParams.Builder()
+                        .setAutoEnterEnabled(false)
+                        .build()
+                )
+            } catch (e: Exception) {
+                Log.e(TAG, "Failed to clear PiP auto-enter params: ${e.message}")
             }
         }
+        if (activity.isInPictureInPictureMode) {
+            activity.moveTaskToBack(false)
+        }
     }
 
     fun isCurrentlyInPiP(): Boolean = isInPiPMode
@@ -126,6 +153,7 @@ class PiPController(private val context: Context, private val appContext: AppCon
 
     fun setPlaybackRate(rate: Double) {
         playbackRate = rate
+        autoEnterEnabled = rate > 0
 
         if (rate > 0) {
             registerLifecycleCallbacks()
@@ -208,7 +236,7 @@ class PiPController(private val context: Context, private val appContext: AppCon
         builder.setActions(buildPiPActions())
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-            builder.setAutoEnterEnabled(forEntering || playbackRate > 0)
+            builder.setAutoEnterEnabled(forEntering || autoEnterEnabled)
         }
 
         return builder.build()