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Avoid possibility of leaking an activity/service context

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The bug here was that we'd create a VideoFrameReleaseTimeHelper
using whatever context DefaultRenderersFactory has, and it would
then hold a reference to that context via DisplayManager. A leak
could then occur if the player outlived the life of the context
used to create it (which would be strange/unusual, but not
impossible).

Issue: #4249

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=198747599
This commit is contained in:
olly 2018-05-31 11:04:00 -07:00 committed by Oliver Woodman
parent 4ecce9802b
commit 7d0769249f
2 changed files with 7 additions and 3 deletions
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2
library/core/src/main/java/com/google/android/exoplayer2/video/MediaCodecVideoRenderer.java
View File

@ -205,7 +205,7 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer {
this.allowedJoiningTimeMs = allowedJoiningTimeMs;
this.maxDroppedFramesToNotify = maxDroppedFramesToNotify;
this.context = context.getApplicationContext();
frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(context);
frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(this.context);
eventDispatcher = new EventDispatcher(eventHandler, eventListener);
deviceNeedsAutoFrcWorkaround = deviceNeedsAutoFrcWorkaround();
pendingOutputStreamOffsetsUs = new long[MAX_PENDING_OUTPUT_STREAM_OFFSET_COUNT];

8
library/core/src/main/java/com/google/android/exoplayer2/video/VideoFrameReleaseTimeHelper.java
View File

@ -72,8 +72,12 @@ public final class VideoFrameReleaseTimeHelper {
* @param context A context from which information about the default display can be retrieved.
*/
public VideoFrameReleaseTimeHelper(@Nullable Context context) {
windowManager = context == null ? null
: (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
if (context != null) {
context = context.getApplicationContext();
windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
} else {
windowManager = null;
}
if (windowManager != null) {
displayListener = Util.SDK_INT >= 17 ? maybeBuildDefaultDisplayListenerV17(context) : null;
vsyncSampler = VSyncSampler.getInstance();