feat(android): allow plugins to override drm session manager (#4558)

android/src/main/java/com/brentvatne/exoplayer/RNVExoplayerPlugin.kt

@@ -3,6 +3,7 @@ package com.brentvatne.exoplayer
 import androidx.media3.common.MediaItem
 import androidx.media3.datasource.DataSource
 import androidx.media3.exoplayer.ExoPlayer
+import androidx.media3.exoplayer.drm.DrmSessionManager
 import com.brentvatne.common.api.Source
 import com.brentvatne.react.RNVPlugin
 
@@ -18,6 +19,15 @@ interface RNVExoplayerPlugin : RNVPlugin {
      */
     fun getDRMManager(): DRMManagerSpec? = null
 
+    /**
+     * Optional function that allows the plugin to override the DrmSessionManager after it has been created.
+     * This is called after buildDrmSessionManager and allows for final modifications to the DrmSessionManager.
+     * @param source The media source being initialized.
+     * @param drmSessionManager The current DrmSessionManager instance.
+     * @return A modified DrmSessionManager if override is needed, or null to use original.
+     */
+    fun overrideDrmSessionManager(source: Source, drmSessionManager: DrmSessionManager): DrmSessionManager? = null
+
     /**
      * Optional function that allows the plugin to override the media data source factory,
      * which is responsible for loading media data.

android/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java

@@ -953,7 +953,10 @@ public class ReactExoplayerView extends FrameLayout implements
             if (drmSessionManager == null) {
                 eventEmitter.onVideoError.invoke("Failed to build DRM session manager", new Exception("DRM session manager is null"), "3007");
             }
-            return drmSessionManager;
+
+            // Allow plugins to override the DrmSessionManager
+            DrmSessionManager overriddenManager = ReactNativeVideoManager.Companion.getInstance().overrideDrmSessionManager(source, drmSessionManager);
+            return overriddenManager != null ? overriddenManager : drmSessionManager;
         } catch (UnsupportedDrmException ex) {
             // Unsupported DRM exceptions are handled by the calling method
             throw ex;

android/src/main/java/com/brentvatne/react/ReactNativeVideoManager.kt

@@ -2,6 +2,7 @@ package com.brentvatne.react
 
 import androidx.media3.common.MediaItem
 import androidx.media3.datasource.DataSource
+import androidx.media3.exoplayer.drm.DrmSessionManager
 import com.brentvatne.common.api.Source
 import com.brentvatne.common.toolbox.DebugLog
 import com.brentvatne.exoplayer.DRMManagerSpec
@@ -78,6 +79,16 @@ class ReactNativeVideoManager : RNVPlugin {
     // ----------------------- RNV Exoplayer plugin specific methods -----------------------
     fun getDRMManager(): DRMManagerSpec? = customDRMManager
 
+    fun overrideDrmSessionManager(source: Source, drmSessionManager: DrmSessionManager): DrmSessionManager? {
+        for (plugin in pluginList) {
+            if (plugin !is RNVExoplayerPlugin) continue
+
+            val overriddenManager = plugin.overrideDrmSessionManager(source, drmSessionManager)
+            if (overriddenManager != null) return overriddenManager
+        }
+        return null
+    }
+
     fun overrideMediaDataSourceFactory(source: Source, mediaDataSourceFactory: DataSource.Factory): DataSource.Factory? {
         for (plugin in pluginList) {
             if (plugin !is RNVExoplayerPlugin) continue