IPC->mojo of audio_renderer_host

content/browser/renderer_host/media/audio_renderer_host.h

 // Copyright (c) 2012 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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware.
 //
 // This class is owned by RenderProcessHostImpl, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread, so we
 // need to be extra careful about the lifetime of this object. AudioManager is a
@@ skipping 46 matching lines @@
 #include "content/browser/renderer_host/media/audio_output_device_enumerator.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/resource_context.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_logging.h"
 #include "media/audio/audio_output_controller.h"
 #include "media/audio/simple_sources.h"
+#include "media/base/output_device_info.h"
+#include "media/mojo/interfaces/audio_output.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
 #include "url/origin.h"
 
 namespace media {
 class AudioManager;
 class AudioParameters;
 }
 
 namespace content {
 
 class AudioMirroringManager;
 class MediaInternals;
 class MediaStreamManager;
 class MediaStreamUIProxy;
 class ResourceContext;
 
-class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
+class CONTENT_EXPORT AudioRendererHost
+    : public base::RefCountedThreadSafe<AudioRendererHost,
+                                        BrowserThread::DeleteOnIOThread>,
+      NON_EXPORTED_BASE(private media::mojom::AudioOutput) {
  public:
   // Called from UI thread from the owner of this object.
   AudioRendererHost(int render_process_id,
                     media::AudioManager* audio_manager,
                     AudioMirroringManager* mirroring_manager,
                     MediaInternals* media_internals,
                     MediaStreamManager* media_stream_manager,
                     const std::string& salt);
 
   // Calls |callback| with the list of AudioOutputControllers for this object.
   void GetOutputControllers(
       const RenderProcessHost::GetAudioOutputControllersCallback&
           callback) const;
 
-  // BrowserMessageFilter implementation.
-  void OnChannelClosing() override;
-  void OnDestruct() const override;
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  // Returns true if any streams managed by this host are actively playing.  Can
+  // Returns true if any streams managed by this host are actively playing. Can
   // be called from any thread.
   bool HasActiveAudio();
 
+  void BindRequest(media::mojom::AudioOutputRequest request);
+
  private:
   friend class AudioRendererHostTest;
   friend class BrowserThread;
   friend class base::DeleteHelper<AudioRendererHost>;
   friend class MockAudioRendererHost;
   friend class TestAudioRendererHost;
+  friend class base::RefCounted<AudioRendererHost>;
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, CreateMockStream);
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, MockStreamDataConversation);
 
   class AudioEntry;
   typedef std::map<int, AudioEntry*> AudioEntryMap;
 
   // Internal callback type for access requests to output devices.
   // |have_access| is true only if there is permission to access the device.
   typedef base::Callback<void(bool have_access)> OutputDeviceAccessCB;
 
   // Internal callback type for information requests about an output device.
   // |success| indicates the operation was successful. If true, |device_info|
   // contains data about the device.
   typedef base::Callback<void(bool success,
                               const AudioOutputDeviceInfo& device_info)>
       OutputDeviceInfoCB;
 
   // The type of a function that is run on the UI thread to check whether the
   // routing IDs reference a valid RenderFrameHost. The function then runs
   // |callback| on the IO thread with true/false if valid/invalid.
   using ValidateRenderFrameIdFunction =
       void (*)(int render_process_id,
                int render_frame_id,
                const base::Callback<void(bool)>& callback);
 
   ~AudioRendererHost() override;
 
-  // Methods called on IO thread ----------------------------------------------
-
-  // Audio related IPC message handlers.
-
   // Request permission to use an output device for use by a stream produced
   // in the RenderFrame referenced by |render_frame_id|.
   // |session_id| is used for unified IO to find out which input device to be
   // opened for the stream. For clients that do not use unified IO,
   // |session_id| will be ignored and the given |device_id| and
   // |security_origin| will be used to select the output device.
   // Upon completion of the process, the peer is notified with the device output
   // parameters via the NotifyDeviceAuthorized message.
-  void OnRequestDeviceAuthorization(int stream_id,
-                                    int render_frame_id,
-                                    int session_id,
-                                    const std::string& device_id,
-                                    const url::Origin& security_origin);
+  void RequestDeviceAuthorization(
+      int stream_id,
+      int render_frame_id,
+      int session_id,
+      const mojo::String& device_id,
+      const url::Origin& origin,
+      const RequestDeviceAuthorizationCallback& callback) override;
+  void CreateStream(int stream_id,
+                    int render_frame_id,
+                    media::mojom::AudioOutputStreamClientPtr client,
+                    const media::AudioParameters& params,
+                    const CreateStreamCallback& callback) override;
+  void CloseStream(int stream_id) override;
 
+  void SendAuthorizationMessage(RequestDeviceAuthorizationCallback callback,

[o1ka, 2016/09/02 07:31:46]

pass it as "const &" everywhere?

+                                int stream_id,
+                                media::OutputDeviceStatus status,
+                                const media::AudioParameters& params,
+                                const std::string& matched_device_id);
+
+  // Methods called on IO thread ----------------------------------------------
+
+  // Audio related IPC message handlers.
   // Creates an audio output stream with the specified format.
   // Upon success/failure, the peer is notified via the NotifyStreamCreated
   // message.
   void OnCreateStream(int stream_id,
                       int render_frame_id,
                       const media::AudioParameters& params);
 
   // Play the audio stream referenced by |stream_id|.
   void OnPlayStream(int stream_id);
 
   // Pause the audio stream referenced by |stream_id|.
   void OnPauseStream(int stream_id);
 
   // Close the audio stream referenced by |stream_id|.
   void OnCloseStream(int stream_id);
 
   // Set the volume of the audio stream referenced by |stream_id|.
   void OnSetVolume(int stream_id, double volume);
 
-  // Helper methods.
-
   // Proceed with device authorization after checking permissions.
   void OnDeviceAuthorized(int stream_id,
+                          RequestDeviceAuthorizationCallback callback,

[o1ka, 2016/09/02 07:31:46]

const &?

                           const std::string& device_id,
                           const url::Origin& security_origin,
                           base::TimeTicks auth_start_time,
                           bool have_access);
 
   // Proceed with device authorization after translating device ID.
   void OnDeviceIDTranslated(int stream_id,
                             base::TimeTicks auth_start_time,
+                            RequestDeviceAuthorizationCallback callback,
                             bool device_found,
                             const AudioOutputDeviceInfo& device_info);
 
   // Start the actual creation of an audio stream, after the device
   // authorization process is complete.
   void DoCreateStream(int stream_id,
                       int render_frame_id,
                       const media::AudioParameters& params,
                       const std::string& device_unique_id,
+                      media::mojom::AudioOutputStreamClientPtr client,
+                      CreateStreamCallback callback,
                       bool render_frame_id_is_valid);
 
   // Complete the process of creating an audio stream. This will set up the
   // shared memory or shared socket in low latency mode and send the
   // NotifyStreamCreated message to the peer.
-  void DoCompleteCreation(int stream_id);
+  void DoCompleteCreation(int stream_id, CreateStreamCallback callback);
 
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
 
   RenderProcessHost::AudioOutputControllerList DoGetOutputControllers() const;
 
   // Send an error message to the renderer.
   void SendErrorMessage(int stream_id);
 
-  // Delete an audio entry, notifying observers first.  This is called by
+  // Delete an audio entry, notifying observers first. This is called by
   // AudioOutputController after it has closed.
   void DeleteEntry(std::unique_ptr<AudioEntry> entry);
 
   // Send an error message to the renderer, then close the stream.
   void ReportErrorAndClose(int stream_id);
 
   // A helper method to look up a AudioEntry identified by |stream_id|.
   // Returns NULL if not found.
   AudioEntry* LookupById(int stream_id);
 
@@ skipping 61 matching lines @@
   // When DCHECKs are turned on, AudioRendererHost will call this function on
   // the UI thread to validate render frame IDs. A default is set by the
   // constructor, but this can be overridden by unit tests.
   ValidateRenderFrameIdFunction validate_render_frame_id_function_;
 #endif  // DCHECK_IS_ON()
 
   // The maximum number of simultaneous streams during the lifetime of this
   // host. Reported as UMA stat at shutdown.
   size_t max_simultaneous_streams_;
 
+  // Binds AudioRendererHost to a media::mojom::AudioOutputRequest.
+  std::unique_ptr<mojo::Binding<media::mojom::AudioOutput>> binding_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_