Let clients interact with VideoCaptureDeviceClient instead of VideoCaptureDevice

services/video_capture/receiver_mojo_to_media_adapter.cc

+// 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.
+
+#include "services/video_capture/receiver_mojo_to_media_adapter.h"
+
+#include "media/mojo/common/media_type_converters.h"
+#include "media/mojo/common/mojo_shared_buffer_video_frame.h"
+
+namespace video_capture {
+
+ReceiverMojoToMediaAdapter::ReceiverMojoToMediaAdapter(
+    mojom::VideoFrameReceiverPtr receiver)
+    : receiver_(std::move(receiver)) {}
+
+ReceiverMojoToMediaAdapter::~ReceiverMojoToMediaAdapter() = default;
+
+void ReceiverMojoToMediaAdapter::OnIncomingCapturedVideoFrame(
+    std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer,
+    const scoped_refptr<media::VideoFrame>& frame) {
+  // O: |frame| should already be backed by a MojoSharedBufferVideoFrame
+  //    assuming we have used the correct buffer factory with the pool.
+  auto video_frame_ptr = media::mojom::VideoFrame::From(frame);
+  receiver_->OnIncomingCapturedVideoFrame(std::move(video_frame_ptr));
+}
+
+void ReceiverMojoToMediaAdapter::OnError() {
+  receiver_->OnError();
+}
+
+void ReceiverMojoToMediaAdapter::OnLog(const std::string& message) {
+  receiver_->OnLog(message);
+}
+
+void ReceiverMojoToMediaAdapter::OnBufferDestroyed(int buffer_id_to_drop) {
+  // Nothing to do here.
+  // This call is only needed for clients who need to explicitly share buffers
+  // with other processes and keep track of which buffers the buffer pool is
+  // no longer going to reuse/resurrect.
+  // In the world of Mojo, we do not need to share buffers explicitly.
+}
+
+}  // namespace video_capture