Index: media/audio/audio_system_impl.cc |
diff --git a/media/audio/audio_system_impl.cc b/media/audio/audio_system_impl.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..35558bb165ece4af789a38e7cb4b11b1eb810560 |
--- /dev/null |
+++ b/media/audio/audio_system_impl.cc |
@@ -0,0 +1,70 @@ |
+// Copyright 2017 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/audio/audio_system_impl.h" |
+ |
+#include "base/memory/ptr_util.h" |
+#include "base/single_thread_task_runner.h" |
+#include "base/task_runner_util.h" |
+#include "media/audio/audio_manager.h" |
+ |
+// Using base::Unretained for |audio_manager_| is safe since it is deleted after |
+// its task runner, and AudioSystemImpl is deleted on the UI thread after the IO |
+// thread has been stopped and before |audio_manager_| deletion is scheduled. |
+namespace media { |
+ |
+namespace { |
+ |
+AudioParameters GetInputParametersOnDeviceThread(AudioManager* audio_manager, |
+ const std::string& device_id) { |
+ DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread()); |
+ |
+ // TODO(olka) : remove this when AudioManager::GetInputStreamParameters() |
tommi (sloooow) - chröme
2017/02/05 20:14:54
nit: TODO(foo):
o1ka
2017/02/06 12:06:08
Done.
|
+ // works this way on all the platforms. |
+ if (!audio_manager->HasAudioInputDevices()) |
+ return AudioParameters(); |
+ |
+ return audio_manager->GetInputStreamParameters(device_id); |
+} |
+ |
+} // namespace |
+ |
+AudioSystemImpl::AudioSystemImpl(AudioManager* audio_manager) |
+ : audio_manager_(audio_manager) { |
+ DCHECK(audio_manager_); |
+} |
+ |
+AudioSystemImpl::~AudioSystemImpl() {} |
+ |
+// static |
+std::unique_ptr<AudioSystem> AudioSystemImpl::Create( |
+ AudioManager* audio_manager) { |
+ return base::WrapUnique(new AudioSystemImpl(audio_manager)); |
+} |
+ |
+base::SingleThreadTaskRunner* AudioSystemImpl::GetTaskRunner() const { |
+ return audio_manager_->GetTaskRunner(); |
+} |
+ |
+void AudioSystemImpl::GetInputStreamParameters( |
tommi (sloooow) - chröme
2017/02/05 20:14:54
is it the intent that this method can be called on
o1ka
2017/02/06 12:06:08
Yes, it can be called from UI and IO threads, and
|
+ const std::string& device_id, |
+ OnAudioParamsCallback on_params_cb) { |
+ if (GetTaskRunner()->BelongsToCurrentThread()) { |
+ GetTaskRunner()->PostTask( |
+ FROM_HERE, base::Bind(on_params_cb, GetInputParametersOnDeviceThread( |
+ audio_manager_, device_id))); |
+ return; |
+ } |
+ base::PostTaskAndReplyWithResult( |
+ GetTaskRunner(), FROM_HERE, |
+ base::Bind(&GetInputParametersOnDeviceThread, |
+ base::Unretained(audio_manager_), device_id), |
+ std::move(on_params_cb)); |
+} |
+ |
+AudioManager* AudioSystemImpl::GetAudioManager() { |
+ return audio_manager_; |
+} |
+ |
+} // namespace media |