Mojo interfaces needed for switching audio rendering stream creation and closing from IPC to Mojo

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 61 matching lines @@
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/shader_disk_cache.h"
 #include "content/browser/histogram_message_filter.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
 #include "content/browser/loader/resource_message_filter.h"
 #include "content/browser/loader/resource_scheduler_filter.h"
+#include "content/browser/media/audio_output_impl.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/media/midi_host.h"
 #include "content/browser/memory/memory_message_filter.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/mime_registry_message_filter.h"
 #include "content/browser/mojo/constants.h"
 #include "content/browser/mojo/mojo_application_host.h"
 #include "content/browser/mojo/mojo_child_connection.h"
 #include "content/browser/notifications/notification_message_filter.h"
@@ skipping 980 matching lines @@
                  base::Unretained(permission_service_context_.get())));
 
   mojo_application_host_->service_registry()->AddService(base::Bind(
       &BackgroundSyncContextImpl::CreateService,
       base::Unretained(storage_partition_impl_->GetBackgroundSyncContext())));
 
   mojo_application_host_->service_registry()->AddService(
       base::Bind(&RenderProcessHostImpl::CreateStoragePartitionService,
                  base::Unretained(this)));
 
+  mojo_application_host_->service_registry()->AddService(
+      base::Bind(&AudioOutputImpl::CreateService, audio_renderer_host_));

[Henrik Grunell, 2016/04/19 15:36:09]

How long does this callback live? I.e. how long is the ref held to ARH?

[rchtara, 2016/04/21 09:10:18]

The callback is going to live until |mojo_application_host_| is reset. After
that, the ref to ARH is going to be released. 

 

[Henrik Grunell, 2016/04/22 08:23:03]

When is it reset?

+
 #if defined(OS_ANDROID)
   ServiceRegistrarAndroid::RegisterProcessHostServices(
       mojo_application_host_->service_registry_android());
 #endif
 
   GetContentClient()->browser()->RegisterRenderProcessMojoServices(
       mojo_application_host_->service_registry());
 }
 
 void RenderProcessHostImpl::CreateStoragePartitionService(
@@ skipping 1736 matching lines @@
 
     // Skip widgets in other processes.
     if (rvh->GetProcess()->GetID() != GetID())
       continue;
 
     rvh->OnWebkitPreferencesChanged();
   }
 }
 
 }  // namespace content