Run VDA::Decode on GPU IO thread if VDA supports it.

content/common/gpu/media/dxva_video_decode_accelerator.cc

 // Copyright (c) 2012 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 "content/common/gpu/media/dxva_video_decode_accelerator.h"
 
 #if !defined(OS_WIN)
 #error This file should only be built on Windows.
 #endif   // !defined(OS_WIN)
 
@@ skipping 496 matching lines @@
 
   state_ = kNormal;
   base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
       &DXVAVideoDecodeAccelerator::NotifyInitializeDone,
       base::AsWeakPtr(this)));
   return true;
 }
 
 void DXVAVideoDecodeAccelerator::Decode(
     const media::BitstreamBuffer& bitstream_buffer) {
+  if (!child_message_loop_->BelongsToCurrentThread) {

[piman, 2013/08/27 04:01:20]

You're missing the () to BelongsToCurrentThread().

[wuchengli, 2013/08/27 12:32:24]

Embarrassing... This part is reverted because of CanDecodeOnIOThread.

+    child_message_loop_->PostTask(
+        FROM_HERE,
+        base::Bind(&DXVAVideoDecodeAccelerator::Decode,
+                   base::AsWeakPtr(this),
+                   bitstream_buffer));
+    return;
+  }
+
   DCHECK(CalledOnValidThread());
 
   RETURN_AND_NOTIFY_ON_FAILURE((state_ == kNormal || state_ == kStopped ||
                                 state_ == kFlushing),
       "Invalid state: " << state_, ILLEGAL_STATE,);
 
   base::win::ScopedComPtr<IMFSample> sample;
   sample.Attach(CreateSampleFromInputBuffer(bitstream_buffer,
                                             input_stream_info_.cbSize,
                                             input_stream_info_.cbAlignment));
@@ skipping 638 matching lines @@
 
   for (index = picture_buffers.begin();
        index != picture_buffers.end();
        ++index) {
     DVLOG(1) << "Dismissing picture id: " << index->second->id();
     client_->DismissPictureBuffer(index->second->id());
   }
 }
 
 }  // namespace content