media: add video capture device for ARC++ camera HAL v3

media/capture/video/chromeos/pixel_format_utils.h

+// Copyright 2017 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 MEDIA_CAPTURE_VIDEO_CHROMEOS_PIXEL_FORMAT_UTILS_H_
+#define MEDIA_CAPTURE_VIDEO_CHROMEOS_PIXEL_FORMAT_UTILS_H_
+
+#include "media/capture/video/chromeos/mojo/arc_camera3.mojom.h"
+#include "media/capture/video_capture_types.h"
+
+namespace media {
+
+// Converts the HAL pixel format |from| to Chromium pixel format.  Returns
+// PIXEL_FORMAT_UNKNOWN if |from| is not supported.
+VideoPixelFormat PixFormatHalToChromium(arc::mojom::HalPixelFormat from);
+
+// Converts the Chromium pixel format |from| to DRM pixel format.  Returns 0
+// if |from| is not supported.
+uint32_t PixFormatChromiumToDrm(VideoPixelFormat from);
+
+}  // namespace media
+
+#endif  // MEDIA_CAPTURE_VIDEO_CHROMEOS_PIXEL_FORMAT_UTILS_H_