Caching AudioOutputDevice instances in mixer manager

media/mojo/services/test_mojo_media_client.cc

 // Copyright 2014 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 "media/mojo/services/test_mojo_media_client.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/audio/audio_device_description.h"
@@ skipping 21 matching lines @@
   // across multiple threads...
   AudioManager* audio_manager = AudioManager::Get();
   if (!audio_manager) {
     audio_manager_ = media::AudioManager::CreateForTesting(
         base::ThreadTaskRunnerHandle::Get());
     audio_manager = audio_manager_.get();
     // Flush the message loop to ensure that the audio manager is initialized.
     base::RunLoop().RunUntilIdle();
   }
 
-  audio_hardware_config_.reset(new AudioHardwareConfig(
-      audio_manager->GetInputStreamParameters(
-          AudioDeviceDescription::kDefaultDeviceId),
-      audio_manager->GetDefaultOutputStreamParameters()));
 }
 
 void TestMojoMediaClient::WillQuit() {
   DVLOG(1) << __FUNCTION__;
   // AudioManager destructor requires MessageLoop.
   // Destroy it before the message loop goes away.
   audio_manager_.reset();
   // Flush the message loop to ensure that the audio manager is destroyed.
   base::RunLoop().RunUntilIdle();
 }
 
 std::unique_ptr<RendererFactory> TestMojoMediaClient::CreateRendererFactory(
     const scoped_refptr<MediaLog>& media_log) {
   DVLOG(1) << __FUNCTION__;
   return base::WrapUnique(new DefaultRendererFactory(
-      media_log, nullptr, DefaultRendererFactory::GetGpuFactoriesCB(),
-      *audio_hardware_config_));
+      media_log, nullptr, DefaultRendererFactory::GetGpuFactoriesCB()));
 }
 
 AudioRendererSink* TestMojoMediaClient::CreateAudioRendererSink() {
   if (!audio_renderer_sink_)
     audio_renderer_sink_ = new AudioOutputStreamSink();
 
   return audio_renderer_sink_.get();
 }
 
 VideoRendererSink* TestMojoMediaClient::CreateVideoRendererSink(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
   if (!video_renderer_sink_) {
     video_renderer_sink_ = base::WrapUnique(
         new NullVideoSink(false, base::TimeDelta::FromSecondsD(1.0 / 60),
                           NullVideoSink::NewFrameCB(), task_runner));
   }
 
   return video_renderer_sink_.get();
 }
 
 std::unique_ptr<CdmFactory> TestMojoMediaClient::CreateCdmFactory(
     shell::mojom::InterfaceProvider* /* interface_provider */) {
   DVLOG(1) << __FUNCTION__;
   return base::WrapUnique(new DefaultCdmFactory());
 }
 
 }  // namespace media