AVFMediaAssetWriter - fix potential race condition(s)

1. m_writerQueue is now shared by recorder control and asset writer
   to ensure it lives long enough.

2. m_delegate->method() calls from async block can be dangerous, since by the time
   this block is actually executed, delegate can be deleted already. This fix uses
   Q_INVOKABLE and invokeMethod with QueuedConnection instead.

3. -finishWritingWithCompletionHandler: is async and when the block finally gets
   executed, lock and 'if aborted' test are still needed.

4. Simplify the logic and reduce locking.

Change-Id: If23daf2fe22043244033427a7f6517a0fe3f23d1
Reviewed-by: Yoann Lopes <yoann.lopes@qt.io>

0 files changed, 0 insertions, 0 deletions