Add support for switching the audio output device for HTMLMediaElements.

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 BrowserRenderProcessHost, 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 20 matching lines @@
 //      |             ...               |
 //      |         CloseStream >         |
 //      v                               v
 
 // A SyncSocket pair is used to signal buffer readiness between processes.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_
 
 #include <map>
+#include <string>
 
 #include "base/atomic_ref_count.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "base/sequenced_task_runner_helpers.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"
 
 namespace media {
 class AudioManager;
 class AudioParameters;
 }
 
 namespace content {
 
 class AudioMirroringManager;
 class MediaInternals;
 class MediaStreamManager;
+class MediaStreamUIProxy;
 class ResourceContext;
 
 class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
  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);
+                    MediaStreamManager* media_stream_manager,
+                    const ResourceContext::SaltCallback& salt_callback);
 
   // 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;
@@ skipping 41 matching lines @@
 
   // 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);
 
+  // Set the output device of the audio stream referenced by |stream_id|.
+  void OnSwitchOutputDevice(int stream_id,
+                            const std::string& device_id,
+                            const GURL& security_origin,
+                            int render_frame_id,
+                            int request_id);
+
+  void OutputDeviceAccessChecked(scoped_ptr<MediaStreamUIProxy> ui_proxy,
+                                 int stream_id,
+                                 const std::string& device_id,
+                                 const GURL& security_origin,
+                                 int render_frame_id,
+                                 int request_id,
+                                 bool have_access);
+
+  void StartTranslateOutputDeviceName(int stream_id,
+                                      const std::string& device_id,
+                                      const GURL& security_origin,
+                                      int request_id);
+
+  void FinishTranslateOutputDeviceName(int stream_id,
+                                       const std::string& device_id,
+                                       const GURL& security_origin,
+                                       int request_id,
+                                       media::AudioDeviceNames*);
+
+  void DoSwitchOutputDevice(int stream_id,
+                            const std::string& raw_device_id,
+                            int request_id);
+
+  void DoOutputDeviceSwitched(int stream_id, int request_id);
+
   // 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);
 
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
 
   RenderProcessHost::AudioOutputControllerList DoGetOutputControllers() const;
 
@@ skipping 24 matching lines @@
 
   // Used to access to AudioInputDeviceManager.
   MediaStreamManager* media_stream_manager_;
 
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;
 
   // The number of streams in the playing state.
   base::AtomicRefCount num_playing_streams_;
 
+  // Salt required to translate renderer device IDs to raw device IDs
+  ResourceContext::SaltCallback salt_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_