Call prepare and release from MediaSources

Issue:#4721
PiperOrigin-RevId: 270342454

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaSource.java

@@ -252,6 +252,7 @@ public final class ProgressiveMediaSource extends BaseMediaSource
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     transferListener = mediaTransferListener;
+    drmSessionManager.prepare();
     notifySourceInfoRefreshed(timelineDurationUs, timelineIsSeekable);
   }
 
@@ -286,7 +287,7 @@ public final class ProgressiveMediaSource extends BaseMediaSource
 
   @Override
   protected void releaseSourceInternal() {
-    // Do nothing.
+    drmSessionManager.release();
   }
 
   // ProgressiveMediaPeriod.Listener implementation.

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java

@@ -657,6 +657,7 @@ public final class DashMediaSource extends BaseMediaSource {
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     this.mediaTransferListener = mediaTransferListener;
+    drmSessionManager.prepare();
     if (sideloadedManifest) {
       processManifest(false);
     } else {
@@ -726,6 +727,7 @@ public final class DashMediaSource extends BaseMediaSource {
     expiredManifestPublishTimeUs = C.TIME_UNSET;
     firstPeriodId = 0;
     periodsById.clear();
+    drmSessionManager.release();
   }
 
   // PlayerEmsgCallback callbacks.

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsMediaSource.java

@@ -357,6 +357,7 @@ public final class HlsMediaSource extends BaseMediaSource
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     this.mediaTransferListener = mediaTransferListener;
+    drmSessionManager.prepare();
     EventDispatcher eventDispatcher = createEventDispatcher(/* mediaPeriodId= */ null);
     playlistTracker.start(manifestUri, eventDispatcher, /* listener= */ this);
   }
@@ -391,6 +392,7 @@ public final class HlsMediaSource extends BaseMediaSource
   @Override
   protected void releaseSourceInternal() {
     playlistTracker.stop();
+    drmSessionManager.release();
   }
 
   @Override

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -552,6 +552,7 @@ public final class SsMediaSource extends BaseMediaSource
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     this.mediaTransferListener = mediaTransferListener;
+    drmSessionManager.prepare();
     if (sideloadedManifest) {
       manifestLoaderErrorThrower = new LoaderErrorThrower.Dummy();
       processManifest();
@@ -606,6 +607,7 @@ public final class SsMediaSource extends BaseMediaSource
       manifestRefreshHandler.removeCallbacksAndMessages(null);
       manifestRefreshHandler = null;
     }
+    drmSessionManager.release();
   }
 
   // Loader.Callback implementation