Audio output debug recording.

media/audio/audio_manager_base.cc

Index: media/audio/audio_manager_base.cc
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index 670820dc3a6ad0f446d429cd97b4e3a7484f5c67..e74b249e87c8171e87fcf4576601766dbe4b4c4e 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -78,17 +78,22 @@ class AudioManagerBase::CompareByParams {
 AudioManagerBase::AudioManagerBase(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
-    AudioLogFactory* audio_log_factory)
+    AudioLogFactory* audio_log_factory,
+    CreateAudioFileWriterCallback create_audio_file_writer_callback)
     : AudioManager(std::move(task_runner), std::move(worker_task_runner)),
       max_num_output_streams_(kDefaultMaxOutputStreams),
       max_num_input_streams_(kDefaultMaxInputStreams),
       num_output_streams_(0),
       // TODO(dalecurtis): Switch this to an base::ObserverListThreadSafe, so we
-      // don't
-      // block the UI thread when swapping devices.
+      // don't block the UI thread when swapping devices.
       output_listeners_(
           base::ObserverList<AudioDeviceListener>::NOTIFY_EXISTING_ONLY),
-      audio_log_factory_(audio_log_factory) {}
+      audio_log_factory_(audio_log_factory),
+      create_audio_file_writer_callback_(
+          std::move(create_audio_file_writer_callback)) {
+  CHECK(!create_audio_file_writer_callback_.Equals(
+      CreateAudioFileWriterCallback()));
+}
 
 AudioManagerBase::~AudioManagerBase() {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
@@ -285,8 +290,19 @@ AudioOutputStream* AudioManagerBase::MakeAudioOutputStreamProxy(
       base::TimeDelta::FromSeconds(kStreamCloseDelaySeconds);
   std::unique_ptr<AudioOutputDispatcher> dispatcher;
   if (output_params.format() != AudioParameters::AUDIO_FAKE) {
-    dispatcher = base::MakeUnique<AudioOutputResampler>(
-        this, params, output_params, output_device_id, kCloseDelay);
+    std::unique_ptr<AudioOutputResampler> resampler =
+        base::MakeUnique<AudioOutputResampler>(this, params, output_params,
+                                               output_device_id, kCloseDelay);
+    output_resamplers_.insert(resampler.get());
+
+    // Debug recording is enabled if the file name is non-empty. If so, also
+    // enable it on the new resampler.
+    if (!debug_recording_base_file_name_.empty()) {
+      resampler->EnableDebugRecording(GetDebugRecordingFileNameWithExtension(
+          debug_recording_base_file_name_));
+    }
+
+    dispatcher = std::move(resampler);
   } else {
     dispatcher = base::MakeUnique<AudioOutputDispatcherImpl>(
         this, output_params, output_device_id, kCloseDelay);
@@ -332,6 +348,7 @@ void AudioManagerBase::Shutdown() {
 
   // Close all output streams.
   output_dispatchers_.clear();
+  output_resamplers_.clear();
 
 #if defined(OS_MACOSX)
   // On mac, AudioManager runs on the main thread, loop for which stops
@@ -433,6 +450,33 @@ std::unique_ptr<AudioLog> AudioManagerBase::CreateAudioLog(
   return audio_log_factory_->CreateAudioLog(component);
 }
 
+std::unique_ptr<AudioFileWriter> AudioManagerBase::CreateAudioFileWriter(
+    const AudioParameters& params) {
+  return create_audio_file_writer_callback_.Run(params);
+}
+
+void AudioManagerBase::EnableOutputDebugRecording(
+    const base::FilePath& base_file_name) {
+  DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+  for (auto it : output_resamplers_) {
+    it->EnableDebugRecording(
+        GetDebugRecordingFileNameWithExtension(base_file_name));
+  }
+  debug_recording_base_file_name_ = base_file_name;
+}
+
+void AudioManagerBase::DisableOutputDebugRecording() {
+  DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+  for (auto it : output_resamplers_)
+    it->DisableDebugRecording();
+  debug_recording_base_file_name_.clear();
+}
+
+base::FilePath AudioManagerBase::GetDebugRecordingFileNameWithExtension(
+    const base::FilePath& file_name) {
+  return file_name.AddExtension("output");
+}
+
 void AudioManagerBase::SetMaxStreamCountForTesting(int max_input,
                                                    int max_output) {
   max_num_output_streams_ = max_output;