chromeos: decode video into NV12 format instead of RGBA in vaapi decoder

ui/ozone/platform/drm/gpu/drm_thread.cc

 // Copyright 2015 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 "ui/ozone/platform/drm/gpu/drm_thread.h"
 
 #include <gbm.h>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 96 matching lines @@
 
 void DrmThread::CreateBuffer(gfx::AcceleratedWidget widget,
                              const gfx::Size& size,
                              gfx::BufferFormat format,
                              gfx::BufferUsage usage,
                              scoped_refptr<GbmBuffer>* buffer) {
   scoped_refptr<GbmDevice> gbm =
       static_cast<GbmDevice*>(device_manager_->GetDrmDevice(widget).get());
   DCHECK(gbm);
 
-  uint32_t flags = 0;
-  switch (usage) {
-    case gfx::BufferUsage::GPU_READ:
-      flags = GBM_BO_USE_TEXTURING;
-      break;
-    case gfx::BufferUsage::SCANOUT:
-      flags = GBM_BO_USE_SCANOUT;
-      break;
-    case gfx::BufferUsage::SCANOUT_CPU_READ_WRITE:
-      flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_LINEAR;
-      break;
-    case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
-    case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
-      flags = GBM_BO_USE_TEXTURING | GBM_BO_USE_LINEAR;
-      break;
-  }
-
+  uint32_t flags = GetGbmFlagsFromBufferUsage(usage);
   DrmWindow* window = screen_manager_->GetWindow(widget);
   std::vector<uint64_t> modifiers;
 
   uint32_t fourcc_format = ui::GetFourCCFormatFromBufferFormat(format);
 
   // TODO(hoegsberg): We shouldn't really get here without a window,
   // but it happens during init. Need to figure out why.
   if (window && window->GetController())
     modifiers = window->GetController()->GetFormatModifiers(fourcc_format);
 
@@ skipping 155 matching lines @@
                                        correction_matrix);
 }
 
 // DrmThread requires a BindingSet instead of a simple Binding because it will
 // be used from multiple threads in multiple processes.
 void DrmThread::AddBinding(ozone::mojom::DeviceCursorRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace ui