media: Destroy VTVDA session on the decoder thread.

media/gpu/vt_video_decode_accelerator_mac.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/gpu/vt_video_decode_accelerator_mac.h"
 
 #include <CoreVideo/CoreVideo.h>
 #include <OpenGL/CGLIOSurface.h>
 #include <OpenGL/gl.h>
 #include <stddef.h>
@@ skipping 797 matching lines @@
   task_queue_.push(task);
   ProcessWorkQueues();
 }
 
 void VTVideoDecodeAccelerator::FlushTask(TaskType type) {
   DVLOG(3) << __func__;
   DCHECK(decoder_thread_.task_runner()->BelongsToCurrentThread());
 
   FinishDelayedFrames();
 
-  // Always queue a task, even if FinishDelayedFrames() fails, so that
-  // destruction always completes.
+  if (type == TASK_DESTROY && session_) {
+    // Destroy the decoding session before returning from the decoder thread.
+    VTDecompressionSessionInvalidate(session_);
+    session_.reset();
+  }
+
+  // Queue a task even if flushing fails, so that destruction always completes.
   gpu_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&VTVideoDecodeAccelerator::FlushDone, weak_this_, type));
 }
 
 void VTVideoDecodeAccelerator::FlushDone(TaskType type) {
   DVLOG(3) << __func__;
   DCHECK(gpu_task_runner_->BelongsToCurrentThread());
   task_queue_.push(Task(type));
   ProcessWorkQueues();
@@ skipping 344 matching lines @@
     SupportedProfile profile;
     profile.profile = supported_profile;
     profile.min_resolution.SetSize(16, 16);
     profile.max_resolution.SetSize(4096, 2160);
     profiles.push_back(profile);
   }
   return profiles;
 }
 
 }  // namespace media