Encode frame number in pixel data for pose sync

device/vr/android/gvr/gvr_device.h

 // Copyright 2016 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.
 
 #ifndef DEVICE_VR_ANDROID_GVR_DEVICE_H
 #define DEVICE_VR_ANDROID_GVR_DEVICE_H
 
 #include "base/macros.h"
 #include "device/vr/vr_device.h"
 
@@ skipping 24 matching lines @@
                          VRLayerBoundsPtr rightBounds) override;
 
   void SetDelegate(GvrDelegate* delegate);
 
  private:
   gvr::GvrApi* GetGvrApi();
 
   GvrDelegate* delegate_;
   GvrDeviceProvider* gvr_provider_;
   bool secure_origin_;
+  uint32_t pose_num_ = 0;

[mthiesse, 2016/10/04 21:19:16]

I think frame_index_ would be more clear.

[klausw, 2016/10/04 23:08:14]

Changed to pose_index_. As discussed, this is strongly associated 1:1 with
generated poses, and these may or may not end up being used for submitted
frames. For example, before requestPresent, an app can be consuming poses but
not using submitFrame().

 
   DISALLOW_COPY_AND_ASSIGN(GvrDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_VR_ANDROID_GVR_DEVICE_H