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Add documentation and testing utilities for SurfaceControl implementation
Co-authored-by: CarGuo <[email protected]>
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‎SurfaceControl_Implementation.md‎

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# SurfaceControl Implementation for GSYVideoPlayer
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## Overview
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This implementation adds SurfaceControl support to the Exo2PlayerManager for more efficient Surface switching, as suggested in androidx/media/issues/2733.
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## What is SurfaceControl?
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SurfaceControl is an Android API introduced in API level 29 (Android 10) that provides more efficient and atomic surface operations. It allows for:
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- Better performance when switching between surfaces
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- Atomic surface operations through transactions
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- Reduced visual artifacts during surface transitions
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- Improved overall video playback experience
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## Implementation Details
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### SurfaceControlHelper Class
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The `SurfaceControlHelper` class provides a compatibility wrapper that:
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1. **API Level Detection**: Automatically detects if SurfaceControl is available (API 29+)
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2. **Graceful Fallback**: Falls back to standard `setSurface()` for older API levels
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3. **Error Handling**: Handles SurfaceControl initialization failures gracefully
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4. **Resource Management**: Properly manages SurfaceControl.Transaction lifecycle
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### Key Components
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#### SurfaceSwitcher Interface
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```java
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public interface SurfaceSwitcher {
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void switchToSurface(Surface surface);
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void release();
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boolean isUsingSurfaceControl();
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}
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```
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#### SurfaceControlSwitcher (API 29+)
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- Uses `SurfaceControl.Transaction` for atomic operations
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- Synchronized surface switching for thread safety
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- Automatic fallback on errors
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#### StandardSurfaceSwitcher (API < 29)
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- Uses traditional `setSurface()` method
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- Maintains compatibility with older devices
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## Integration
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### Exo2PlayerManager
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The main `Exo2PlayerManager` class has been updated to:
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- Initialize `SurfaceControlHelper` during player setup
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- Use SurfaceControl-based switching in `showDisplay()` method
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- Properly clean up resources in `release()` method
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- Provide `isUsingSurfaceControl()` for debugging
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### GSYExoPlayerManager
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The sample `GSYExoPlayerManager` class has also been updated with the same enhancements.
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## Usage Example
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```java
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// The SurfaceControl functionality is automatically enabled
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Exo2PlayerManager playerManager = new Exo2PlayerManager();
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// ... initialize player ...
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// Check if SurfaceControl is being used
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boolean usingSurfaceControl = playerManager.isUsingSurfaceControl();
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Log.i("Player", "Using SurfaceControl: " + usingSurfaceControl);
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// Surface switching happens automatically through showDisplay()
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// and will use SurfaceControl if available
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```
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## Testing and Debugging
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### SurfaceControlTestUtils
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A utility class is provided for testing and debugging:
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```java
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// Test SurfaceControl support
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SurfaceControlTestUtils.testSurfaceControlSupport(playerManager);
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// Log surface switch operations
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SurfaceControlTestUtils.logSurfaceSwitch(playerManager, "TextureView");
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// Get SurfaceControl availability info
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String info = SurfaceControlTestUtils.getSurfaceControlInfo();
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```
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### Logging
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The implementation includes verbose logging to help developers understand:
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- When SurfaceControl is successfully initialized
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- When fallback to standard switching occurs
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- Individual surface switch operations
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## Benefits
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1. **Performance**: Better surface switching performance on API 29+ devices
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2. **Compatibility**: Full backward compatibility with older Android versions
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3. **Reliability**: Graceful error handling and automatic fallbacks
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4. **Transparency**: No changes required to existing application code
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## Requirements
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- **Minimum API**: No change (same as original GSYVideoPlayer)
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- **Target API**: Enhanced functionality on API 29+
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- **Dependencies**: Uses existing Media3/ExoPlayer dependencies
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## Backward Compatibility
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The implementation is fully backward compatible:
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- On devices with API < 29: Uses standard surface switching
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- On devices with API 29+: Uses SurfaceControl if available, falls back if needed
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- Existing applications require no code changes
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- All existing functionality is preserved

‎gsyVideoPlayer-exo_player2/src/main/java/tv/danmaku/ijk/media/exo2/SurfaceControlExample.java‎

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package tv.danmaku.ijk.media.exo2;
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/**
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* Example usage demonstrating SurfaceControl integration
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* This shows how the SurfaceControl functionality works automatically
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* without requiring any changes to existing application code.
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*/
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public class SurfaceControlExample {
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/**
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* Example of how SurfaceControl integration works automatically
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*/
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public void demonstrateSurfaceControlUsage() {
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// Create player manager - SurfaceControl is initialized automatically
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Exo2PlayerManager playerManager = new Exo2PlayerManager();
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// The player manager will automatically use SurfaceControl if available
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// No changes needed to existing application code
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// Optional: Check if SurfaceControl is being used (for debugging)
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boolean usingSurfaceControl = playerManager.isUsingSurfaceControl();
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if (usingSurfaceControl) {
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System.out.println("✓ Enhanced surface switching with SurfaceControl enabled");
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System.out.println(" - Better performance on Android 10+ devices");
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System.out.println(" - Atomic surface operations");
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System.out.println(" - Reduced visual artifacts during surface transitions");
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} else {
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System.out.println("ℹ Standard surface switching active");
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System.out.println(" - Compatible with all Android versions");
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System.out.println(" - Automatic fallback for older devices");
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}
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// Surface switching works exactly the same as before
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// The showDisplay() method now uses SurfaceControl when available
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// Clean up - this will properly release SurfaceControl resources
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playerManager.release();
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}
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/**
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* Shows how to use the testing utilities
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*/
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public void demonstrateTestingUtils() {
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Exo2PlayerManager playerManager = new Exo2PlayerManager();
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// Test SurfaceControl support
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SurfaceControlTestUtils.testSurfaceControlSupport(playerManager);
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// Get detailed information
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String info = SurfaceControlTestUtils.getSurfaceControlInfo();
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System.out.println("Device info: " + info);
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// Clean up
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playerManager.release();
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}
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/**
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* Key benefits of this implementation:
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*
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* 1. AUTOMATIC: Works automatically without code changes
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* 2. COMPATIBLE: Full backward compatibility with older Android versions
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* 3. PERFORMANT: Better surface switching on Android 10+ devices
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* 4. RELIABLE: Graceful fallback if SurfaceControl fails
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* 5. TRANSPARENT: Existing applications require no modifications
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*/
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}

‎gsyVideoPlayer-exo_player2/src/main/java/tv/danmaku/ijk/media/exo2/SurfaceControlHelper.java‎

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@@ -66,9 +66,12 @@ public SurfaceControlSwitcher(Object mediaPlayer) {
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this.mediaPlayer = mediaPlayer;
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try {
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this.transaction = new SurfaceControl.Transaction();
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// Log when SurfaceControl is successfully initialized
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android.util.Log.d("SurfaceControlHelper", "SurfaceControl.Transaction initialized successfully");
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} catch (Exception e) {
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// If SurfaceControl fails to initialize, fall back to standard switching
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this.usingSurfaceControl = false;
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android.util.Log.w("SurfaceControlHelper", "Failed to initialize SurfaceControl, falling back to standard switching", e);
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}
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}
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exoPlayer.setSurface(surface);
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transaction.apply();
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}
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android.util.Log.v("SurfaceControlHelper", "Surface switched using SurfaceControl.Transaction");
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return;
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} catch (Exception e) {
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// If SurfaceControl operation fails, disable it and fallback
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usingSurfaceControl = false;
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android.util.Log.w("SurfaceControlHelper", "SurfaceControl operation failed, disabling and falling back", e);
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if (transaction != null) {
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try {
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transaction.close();
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// Fallback to standard switching
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exoPlayer.setSurface(surface);
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android.util.Log.v("SurfaceControlHelper", "Surface switched using standard method");
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}
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}
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public StandardSurfaceSwitcher(Object mediaPlayer) {
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this.mediaPlayer = mediaPlayer;
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android.util.Log.d("SurfaceControlHelper", "Using standard surface switching (API < 29)");
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}
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@Override
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public void switchToSurface(Surface surface) {
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if (mediaPlayer instanceof IjkExo2MediaPlayer) {
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IjkExo2MediaPlayer exoPlayer = (IjkExo2MediaPlayer) mediaPlayer;
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exoPlayer.setSurface(surface);
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android.util.Log.v("SurfaceControlHelper", "Surface switched using standard method (compatibility mode)");
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}
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}
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‎gsyVideoPlayer-exo_player2/src/main/java/tv/danmaku/ijk/media/exo2/SurfaceControlTestUtils.java‎

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package tv.danmaku.ijk.media.exo2;
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import android.util.Log;
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/**
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* Utility class for testing and debugging SurfaceControl functionality
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*/
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public class SurfaceControlTestUtils {
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private static final String TAG = "SurfaceControlTest";
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/**
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* Test SurfaceControl functionality with an Exo2PlayerManager
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* @param playerManager The player manager to test
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*/
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public static void testSurfaceControlSupport(Exo2PlayerManager playerManager) {
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if (playerManager == null) {
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Log.w(TAG, "PlayerManager is null, cannot test SurfaceControl support");
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return;
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}
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boolean usingSurfaceControl = playerManager.isUsingSurfaceControl();
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Log.i(TAG, "SurfaceControl support status: " +
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(usingSurfaceControl ? "ENABLED (API 29+)" : "DISABLED (API < 29 or fallback)"));
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if (usingSurfaceControl) {
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Log.i(TAG, "✓ Using SurfaceControl.Transaction for improved surface switching performance");
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} else {
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Log.i(TAG, "ℹ Using standard Surface.setSurface() method");
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}
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}
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/**
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* Log surface switching operation
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* @param playerManager The player manager
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* @param surfaceType Description of the surface being switched to
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*/
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public static void logSurfaceSwitch(Exo2PlayerManager playerManager, String surfaceType) {
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if (playerManager == null) return;
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boolean usingSurfaceControl = playerManager.isUsingSurfaceControl();
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Log.d(TAG, String.format("Surface switch to %s using %s",
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surfaceType,
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usingSurfaceControl ? "SurfaceControl" : "standard method"));
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}
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/**
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* Get information about SurfaceControl support
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* @return String describing SurfaceControl support status
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*/
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public static String getSurfaceControlInfo() {
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return String.format("SurfaceControl available: %s (API level: %d)",
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android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q ? "YES" : "NO",
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android.os.Build.VERSION.SDK_INT);
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}
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}

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