Implement Mojo IPC for media::HDRMetadata

media/mojo/interfaces/hdr_metadata_struct_traits.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_MOJO_INTERFACES_HDR_METADATA_STRUCT_TRAITS_H_
+#define MEDIA_MOJO_INTERFACES_HDR_METADATA_STRUCT_TRAITS_H_
+
+#include "media/base/hdr_metadata.h"
+#include "media/mojo/interfaces/media_types.mojom.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<media::mojom::MasteringMetadataDataView,
+                    media::MasteringMetadata> {
+  static float primary_r_chromaticity_x(const media::MasteringMetadata& input) {
+    return input.primary_r_chromaticity_x;
+  }
+  static float primary_r_chromaticity_y(const media::MasteringMetadata& input) {
+    return input.primary_r_chromaticity_y;
+  }

[xhwang, 2017/04/07 16:24:47]

+hubbe:

Does it make sense to put x and y in a data structure, e.g.

struct Chromaticity {
  float x;
  float y;
}

Chromaticity primary_r;
Chromaticity primary_g;
...

[hubbe, 2017/04/07 17:24:22]

Yes, yes it does.

+  static float primary_g_chromaticity_x(const media::MasteringMetadata& input) {
+    return input.primary_g_chromaticity_x;
+  }
+  static float primary_g_chromaticity_y(const media::MasteringMetadata& input) {
+    return input.primary_g_chromaticity_y;
+  }
+  static float primary_b_chromaticity_x(const media::MasteringMetadata& input) {
+    return input.primary_b_chromaticity_x;
+  }
+  static float primary_b_chromaticity_y(const media::MasteringMetadata& input) {
+    return input.primary_b_chromaticity_y;
+  }
+  static float white_point_chromaticity_x(const media::MasteringMetadata& inp) {
+    return inp.white_point_chromaticity_x;
+  }
+  static float white_point_chromaticity_y(const media::MasteringMetadata& inp) {
+    return inp.white_point_chromaticity_y;
+  }
+  static float luminance_max(const media::MasteringMetadata& input) {
+    return input.luminance_max;
+  }
+  static float luminance_min(const media::MasteringMetadata& input) {
+    return input.luminance_min;
+  }
+
+  static bool Read(media::mojom::MasteringMetadataDataView data,
+                   media::MasteringMetadata* output) {
+    output->primary_r_chromaticity_x = data.primary_r_chromaticity_x();
+    output->primary_r_chromaticity_y = data.primary_r_chromaticity_y();
+    output->primary_g_chromaticity_x = data.primary_g_chromaticity_x();
+    output->primary_g_chromaticity_y = data.primary_g_chromaticity_y();
+    output->primary_b_chromaticity_x = data.primary_b_chromaticity_x();
+    output->primary_b_chromaticity_y = data.primary_b_chromaticity_y();
+    output->white_point_chromaticity_x = data.white_point_chromaticity_x();
+    output->white_point_chromaticity_y = data.white_point_chromaticity_y();
+    output->luminance_max = data.luminance_max();
+    output->luminance_min = data.luminance_min();
+    return true;
+  }
+};
+
+template <>
+struct StructTraits<media::mojom::HDRMetadataDataView, media::HDRMetadata> {
+  static unsigned max_cll(const media::HDRMetadata& input) {
+    return input.max_cll;
+  }
+  static unsigned max_fall(const media::HDRMetadata& input) {
+    return input.max_fall;
+  }
+  static media::MasteringMetadata mastering_metadata(
+      const media::HDRMetadata& input) {
+    return input.mastering_metadata;
+  }
+
+  static bool Read(media::mojom::HDRMetadataDataView data,
+                   media::HDRMetadata* output) {
+    output->max_cll = data.max_cll();
+    output->max_fall = data.max_fall();
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // MEDIA_MOJO_INTERFACES_HDR_METADATA_STRUCT_TRAITS_H_