Migrate MediaDevices.enumerateDevices to Mojo

content/browser/renderer_host/media/media_devices_dispatcher_host.h

+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_
+
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "content/browser/renderer_host/media/media_devices_manager.h"
+#include "content/common/content_export.h"
+#include "content/common/media/media_devices.mojom.h"
+
+using ::mojom::MediaDeviceType;
+
+namespace url {
+class Origin;
+}
+
+namespace content {
+
+class MediaStreamManager;
+class MediaStreamUIProxy;
+
+class CONTENT_EXPORT MediaDevicesDispatcherHost
+    : public ::mojom::MediaDevicesDispatcherHost {
+ public:
+  MediaDevicesDispatcherHost(int render_process_id,
+                             int routing_id,
+                             const std::string& device_id_salt,
+                             MediaStreamManager* media_stream_manager,
+                             bool use_fake_ui);
+  ~MediaDevicesDispatcherHost() override;
+
+  static void Create(int render_process_id,
+                     int routing_id,
+                     const std::string& device_id_salt,
+                     MediaStreamManager* media_stream_manager,
+                     bool use_fake_ui,
+                     ::mojom::MediaDevicesDispatcherHostRequest request);
+
+  // ::mojom::MediaDevicesDispatcherHost implementation.
+  void EnumerateDevices(
+      bool request_audio_input,
+      bool request_video_input,
+      bool request_audio_output,
+      const url::Origin& security_origin,
+      const EnumerateDevicesCallback& client_callback) override;
+
+  // Sets a MediaStreamUIProxy to be used in a single run of EnumerateDevices(),
+  // provided that the MediaDevicesDispatcherHost was created with |use_fake_ui|
+  // set to true. Subsequent runs of EnumerateDevices() use a new internally
+  // generated fake MediaStreamUIProxy.
+  // |fake_ui_proxy| is ignored if the MediaDevicesDispatcherHost was created
+  // with |use_fake_ui|, in which case a real MediaStreamUIProxy will be used
+  // instead.
+  // This function is intended to be used for testing.
+  void SetFakeUIProxyForTesting(
+      std::unique_ptr<MediaStreamUIProxy> fake_ui_proxy);
+
+ private:
+  // Internal type that represents a callback that receives a
+  // MediaDevicesManager::BoolDeviceTypes containing the permissions for each
+  // device type.
+  using AccessCheckedCallback =
+      base::Callback<void(const MediaDevicesManager::BoolDeviceTypes&)>;
+
+  // Currently, the same permission (MEDIA_DEVICE_AUDIO_CAPTURE) is used for
+  // both audio input and output.
+  // TODO(guidou): use specific permission for audio output when it becomes
+  // available. See http://crbug.com/556542.
+  void CheckAccess(bool check_audio,
+                   bool check_video_input,
+                   const url::Origin& security_origin,
+                   const AccessCheckedCallback& callback);
+
+  void AudioAccessChecked(std::unique_ptr<MediaStreamUIProxy> ui_proxy,
+                          bool check_video_permission,
+                          const url::Origin& security_origin,
+                          const AccessCheckedCallback& callback,
+                          bool has_audio_permission);
+
+  void VideoAccessChecked(std::unique_ptr<MediaStreamUIProxy> ui_proxy,
+                          bool has_audio_permission,
+                          const AccessCheckedCallback& callback,
+                          bool has_video_permission);
+
+  void DoEnumerateDevices(
+      const MediaDevicesManager::BoolDeviceTypes& requested_types,
+      const url::Origin& security_origin,
+      const EnumerateDevicesCallback& client_callback,
+      const MediaDevicesManager::BoolDeviceTypes& permissions);
+
+  void DevicesEnumerated(
+      const MediaDevicesManager::BoolDeviceTypes& requested_types,
+      const url::Origin& security_origin,
+      const EnumerateDevicesCallback& client_callback,
+      const MediaDevicesManager::BoolDeviceTypes& has_permissions,
+      const MediaDeviceEnumeration& enumeration);
+
+  std::unique_ptr<MediaStreamUIProxy> GetUIProxy();
+
+  int render_process_id_;
+  int routing_id_;
+  std::string device_id_salt_;
+  std::string group_id_salt_;
+  MediaStreamManager* media_stream_manager_;
+  bool use_fake_ui_;
+  std::unique_ptr<MediaStreamUIProxy> fake_ui_proxy_;
+
+  base::WeakPtrFactory<MediaDevicesDispatcherHost> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaDevicesDispatcherHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_