Replace MediaStreamUIController with MediaStreamUIProxy.

content/browser/renderer_host/media/media_stream_ui_proxy.cc

+// Copyright 2013 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 "content/browser/renderer_host/media/media_stream_ui_proxy.h"
+
+#include "content/browser/renderer_host/render_view_host_delegate.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/public/browser/browser_thread.h"
+#include "media/video/capture/fake_video_capture_device.h"
+
+namespace content {
+
+class MediaStreamUIProxy::Core {
+ public:
+  explicit Core(const base::WeakPtr<MediaStreamUIProxy>& proxy);
+  ~Core();
+
+  void RequestAccess(const MediaStreamRequest& request);
+  void OnStarted();
+
+ private:
+  void ProcessAccessRequestResponse(const MediaStreamDevices& devices,
+                                    scoped_ptr<MediaStreamUI> stream_ui);
+  void ProcessStopRequestFromUI();
+
+  base::WeakPtr<MediaStreamUIProxy> proxy_;
+  scoped_ptr<MediaStreamUI> ui_;
+
+  DISALLOW_COPY_AND_ASSIGN(Core);
+};
+
+MediaStreamUIProxy::Core::Core(const base::WeakPtr<MediaStreamUIProxy>& proxy)
+    : proxy_(proxy) {
+}
+
+MediaStreamUIProxy::Core::~Core() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+}
+
+void MediaStreamUIProxy::Core::RequestAccess(
+    const MediaStreamRequest& request) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  RenderViewHostImpl* host = RenderViewHostImpl::FromID(
+      request.render_process_id, request.render_view_id);
+
+  // Tab may have gone away.
+  if (!host || !host->GetDelegate()) {
+    ProcessAccessRequestResponse(
+        MediaStreamDevices(), scoped_ptr<MediaStreamUI>());
+    return;
+  }
+
+  host->GetDelegate()->RequestMediaAccessPermission(
+      request, base::Bind(&Core::ProcessAccessRequestResponse,
+                          base::Unretained(this)));
+}
+
+void MediaStreamUIProxy::Core::OnStarted() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (ui_) {
+    ui_->OnStarted(base::Bind(&Core::ProcessStopRequestFromUI,
+                              base::Unretained(this)));
+  }
+}
+
+void MediaStreamUIProxy::Core::ProcessAccessRequestResponse(
+    const MediaStreamDevices& devices,
+    scoped_ptr<MediaStreamUI> stream_ui) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  ui_ = stream_ui.Pass();
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&MediaStreamUIProxy::ProcessAccessRequestResponse,
+                 proxy_, devices));
+}
+
+void MediaStreamUIProxy::Core::ProcessStopRequestFromUI() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&MediaStreamUIProxy::ProcessStopRequestFromUI, proxy_));
+}
+
+MediaStreamUIProxy::MediaStreamUIProxy()
+    : ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  core_.reset(new Core(weak_factory_.GetWeakPtr()));
+}
+
+MediaStreamUIProxy::~MediaStreamUIProxy() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, core_.release());
+}
+
+void MediaStreamUIProxy::RequestAccess(
+    const MediaStreamRequest& request,
+    const ResponseCallback& response_callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  response_callback_ = response_callback;
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&Core::RequestAccess, base::Unretained(core_.get()), request));
+}
+
+void MediaStreamUIProxy::OnStarted(const base::Closure& stop_callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  stop_callback_ = stop_callback;
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&Core::OnStarted, base::Unretained(core_.get())));
+}
+
+void MediaStreamUIProxy::ProcessAccessRequestResponse(
+    const MediaStreamDevices& devices) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!response_callback_.is_null());
+
+  ResponseCallback cb = response_callback_;
+  response_callback_.Reset();
+  cb.Run(devices);
+}
+
+void MediaStreamUIProxy::ProcessStopRequestFromUI() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!stop_callback_.is_null());
+
+  base::Closure cb = stop_callback_;
+  stop_callback_.Reset();
+  cb.Run();
+}
+
+FakeMediaStreamUIProxy::FakeMediaStreamUIProxy() {}
+FakeMediaStreamUIProxy::~FakeMediaStreamUIProxy() {}
+
+void FakeMediaStreamUIProxy::RequestAccess(
+    const MediaStreamRequest& request,
+    const ResponseCallback& response_callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  MediaStreamDevices devices;
+
+  if (IsAudioMediaType(request.audio_type)) {
+    devices.push_back(MediaStreamDevice(request.audio_type, "Mic", "Mic"));
+  }
+
+  if (IsVideoMediaType(request.video_type)) {
+    media::VideoCaptureDevice::Names device_names;
+    media::FakeVideoCaptureDevice::GetDeviceNames(&device_names);
+    if (!device_names.empty()) {
+      devices.push_back(MediaStreamDevice(
+          request.video_type,
+          device_names.front().unique_id,
+          device_names.front().device_name));
+    }
+  }
+
+  response_callback_ = response_callback;
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&MediaStreamUIProxy::ProcessAccessRequestResponse,
+                 weak_factory_.GetWeakPtr(), devices));
+}
+
+void FakeMediaStreamUIProxy::OnStarted(const base::Closure& stop_callback) {
+}
+
+}  // namespace content