Switching audio clients to using RestartableAudioRendererSink interface as a sink.

content/renderer/media/audio_device_factory.cc

 // 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.
 
 #include "content/renderer/media/audio_device_factory.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/media/audio_message_filter.h"
+#include "content/renderer/media/audio_renderer_mixer_manager.h"
+#include "content/renderer/render_thread_impl.h"
 #include "media/audio/audio_input_device.h"
 #include "media/audio/audio_output_device.h"
+#include "media/base/audio_renderer_mixer_input.h"
 #include "url/origin.h"
 
 namespace content {
 
 // static
 AudioDeviceFactory* AudioDeviceFactory::factory_ = NULL;
 
+namespace {
+
+// This is where we decide which audio will go to mixers and which one to
+// AudioOutpuDevice directly.
+bool IsMixable(AudioDeviceFactory::SourceType source_type) {
+  if (source_type == AudioDeviceFactory::kSourceMediaElement)
+    return true;  // Must ALWAYS go through mixer.
+
+  // TODO(olka): make a decision for the rest of the sources basing on OS
+  // type and configuration parameters.
+  return false;
+}
+
+scoped_refptr<media::RestartableAudioRendererSink> NewMixableSink(
+    int render_frame_id,
+    const std::string& device_id,
+    const url::Origin& security_origin) {
+  RenderThreadImpl* render_thread = RenderThreadImpl::current();
+  return scoped_refptr<media::AudioRendererMixerInput>(
+      render_thread->GetAudioRendererMixerManager()->CreateInput(
+          render_frame_id, device_id, security_origin));
+}
+
+scoped_refptr<media::AudioRendererSink> NewUnmixableSink(
+    int render_frame_id,
+    int session_id,
+    const std::string& device_id,
+    const url::Origin& security_origin) {
+  return AudioDeviceFactory::NewOutputDevice(render_frame_id, session_id,
+                                             device_id, security_origin);
+}
+
+}  // namespace
+
 // static
 scoped_refptr<media::AudioOutputDevice> AudioDeviceFactory::NewOutputDevice(
     int render_frame_id,
     int session_id,
     const std::string& device_id,
     const url::Origin& security_origin) {
   if (factory_) {
     media::AudioOutputDevice* const device = factory_->CreateOutputDevice(
         render_frame_id, session_id, device_id, security_origin);
     if (device)
       return device;
   }
 
   AudioMessageFilter* const filter = AudioMessageFilter::Get();
   scoped_refptr<media::AudioOutputDevice> device = new media::AudioOutputDevice(
       filter->CreateAudioOutputIPC(render_frame_id), filter->io_task_runner(),
       session_id, device_id, security_origin);
   device->RequestDeviceAuthorization();
   return device;
 }
 
 // static
+scoped_refptr<media::AudioRendererSink>
+AudioDeviceFactory::NewAudioRendererSink(SourceType source_type,
+                                         int render_frame_id,
+                                         int session_id,
+                                         const std::string& device_id,
+                                         const url::Origin& security_origin) {
+  if (factory_) {
+    media::AudioRendererSink* const device = factory_->CreateAudioRendererSink(
+        source_type, render_frame_id, session_id, device_id, security_origin);
+    if (device)
+      return device;
+  }
+
+  if (IsMixable(source_type))
+    return NewMixableSink(render_frame_id, device_id, security_origin);
+
+  return NewUnmixableSink(render_frame_id, session_id, device_id,
+                          security_origin);
+}
+
+// static
+scoped_refptr<media::RestartableAudioRendererSink>
+AudioDeviceFactory::NewRestartableAudioRendererSink(
+    SourceType source_type,
+    int render_frame_id,
+    int session_id,
+    const std::string& device_id,
+    const url::Origin& security_origin) {
+  if (factory_) {
+    media::RestartableAudioRendererSink* const device =
+        factory_->CreateRestartableAudioRendererSink(
+            source_type, render_frame_id, session_id, device_id,
+            security_origin);
+    if (device)
+      return device;
+  }
+
+  if (IsMixable(source_type))
+    return NewMixableSink(render_frame_id, device_id, security_origin);
+
+  // AudioOutputDevice is not RestartableAudioRendererSink, so we can't return
+  // anything for those who wants to create an unmixable sink.
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
+// static
 scoped_refptr<media::AudioInputDevice> AudioDeviceFactory::NewInputDevice(
     int render_frame_id) {
   if (factory_) {
     media::AudioInputDevice* const device =
         factory_->CreateInputDevice(render_frame_id);
     if (device)
       return device;
   }
 
   AudioInputMessageFilter* const filter = AudioInputMessageFilter::Get();
   return new media::AudioInputDevice(
       filter->CreateAudioInputIPC(render_frame_id), filter->io_task_runner());
 }
 
+// static
+// TODO(http://crbug.com/587461): Find a better way to check if device exists
+// and is authorized.
+media::OutputDeviceStatus AudioDeviceFactory::GetOutputDeviceStatus(
+    int render_frame_id,
+    int session_id,
+    const std::string& device_id,
+    const url::Origin& security_origin) {
+  scoped_refptr<media::AudioOutputDevice> device =
+      NewOutputDevice(render_frame_id, session_id, device_id, security_origin);
+  media::OutputDeviceStatus status = device->GetDeviceStatus();
+
+  device->Stop();  // Must be stopped.
+  return status;
+}
+
 AudioDeviceFactory::AudioDeviceFactory() {
   DCHECK(!factory_) << "Can't register two factories at once.";
   factory_ = this;
 }
 
 AudioDeviceFactory::~AudioDeviceFactory() {
   factory_ = NULL;
 }
 
 }  // namespace content