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

ui/ozone/platform/drm/common/drm_util.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 "ui/ozone/platform/drm/common/drm_util.h"
 
 #include <drm_fourcc.h>
+#include <gbm.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <sys/mman.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 #include <algorithm>
 #include <utility>
 
 #include "base/containers/flat_map.h"
 #include "base/memory/ptr_util.h"
@@ skipping 493 matching lines @@
     case gfx::BufferFormat::YUV_420_BIPLANAR:
       return DRM_FORMAT_NV12;
     case gfx::BufferFormat::YVU_420:
       return DRM_FORMAT_YVU420;
     default:
       NOTREACHED();
       return 0;
   }
 }
 
+uint32_t GetGbmFlagsFromBufferUsage(gfx::BufferUsage usage) {
+  switch (usage) {
+    case gfx::BufferUsage::GPU_READ:
+      return GBM_BO_USE_TEXTURING;
+    case gfx::BufferUsage::SCANOUT:
+      return GBM_BO_USE_SCANOUT;
+    case gfx::BufferUsage::SCANOUT_CPU_READ_WRITE:
+      return GBM_BO_USE_SCANOUT | GBM_BO_USE_LINEAR;
+    case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
+    case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
+      return GBM_BO_USE_TEXTURING | GBM_BO_USE_LINEAR;
+  }
+}
+
+gfx::BufferUsage GetBufferUsageFromGbmFlags(int flags) {
+  switch (flags) {
+    case GBM_BO_USE_TEXTURING:

[gurchetansingh, 2017/06/28 20:59:18]

After the gbm.h change lands, you still have to roll minigbm in
~/src/third_party/minigbm/ in the Chrome tree before this can land.

+      return gfx::BufferUsage::GPU_READ;
+    case GBM_BO_USE_SCANOUT:
+      return gfx::BufferUsage::SCANOUT;
+    case GBM_BO_USE_SCANOUT | GBM_BO_USE_LINEAR:
+      return gfx::BufferUsage::SCANOUT_CPU_READ_WRITE;
+    case GBM_BO_USE_TEXTURING | GBM_BO_USE_LINEAR:
+      return gfx::BufferUsage::GPU_READ_CPU_READ_WRITE;
+    default:
+      NOTREACHED();
+      return gfx::BufferUsage::SCANOUT;
+  }
+}
+
 MovableDisplaySnapshots CreateMovableDisplaySnapshotsFromParams(
     const std::vector<DisplaySnapshot_Params>& displays) {
   MovableDisplaySnapshots snapshots;
   for (const auto& d : displays)
     snapshots.push_back(base::MakeUnique<DisplaySnapshotProxy>(d));
   return snapshots;
 }
 
 }  // namespace ui