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Commit 36b6c9dc authored by dakinola's avatar dakinola
Browse files

Fix capturing mid-transition frames 

To stop capturing mid-transition frames, we listen to visibility changes which indicate an incoming transition to/away from the captured task, and toggle the visibility of the recorded surface accordingly. This allows the virtual display to stop sending new frames before a transition starts, so users will simply see a frozen frame from before the transition instead of the exact last frame before the window is no longer visible (which sometimes is a mid-transition frame).

Bug: 314262003
Flag: None
Test: Manual testing
Change-Id: I0a540cfa4c06b6e7cac628781c4b1773f6d6f9aa
parent 2ce9e8b0

services/core/java/com/android/server/wm/ContentRecorder.java

+8 −0
Original line number Diff line number Diff line
@@ -650,6 +650,14 @@ final class ContentRecorder implements WindowContainerListener { 
        if (isCurrentlyRecording() && mLastRecordedBounds != null) {

            mMediaProjectionManager.notifyActiveProjectionCapturedContentVisibilityChanged(

                    isVisibleRequested);



            if (mContentRecordingSession.getContentToRecord() == RECORD_CONTENT_TASK) {

                // If capturing a task, then the toggle visibility of the recorded surface to match

                // visibility of the task, so we don't capture any mid-transition frames

                mRecordedWindowContainer.getSyncTransaction()

                        .setVisibility(mRecordedSurface, isVisibleRequested);

                mRecordedWindowContainer.scheduleAnimation();

            }

        }

    }