Improve logging related to start/stop and failure of audio input streams in Chrome

media/audio/audio_input_controller.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 "media/audio/audio_input_controller.h"
 
 #include "base/bind.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
@@ skipping 102 matching lines @@
     return factory_->Create(
         audio_manager, event_handler, params, user_input_monitor);
   }
   scoped_refptr<AudioInputController> controller(
       new AudioInputController(event_handler, NULL, user_input_monitor));
 
   controller->task_runner_ = audio_manager->GetTaskRunner();
 
   // Create and open a new audio input stream from the existing
   // audio-device thread.
-  if (!controller->task_runner_->PostTask(FROM_HERE,
-          base::Bind(&AudioInputController::DoCreate, controller,
-                     base::Unretained(audio_manager), params, device_id))) {
+  if (!controller->task_runner_->PostTask(
+          FROM_HERE,
+          base::Bind(&AudioInputController::DoCreate,
+                     controller,
+                     base::Unretained(audio_manager),
+                     params,
+                     device_id))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::CreateLowLatency(
     AudioManager* audio_manager,
     EventHandler* event_handler,
     const AudioParameters& params,
     const std::string& device_id,
     SyncWriter* sync_writer,
     UserInputMonitor* user_input_monitor) {
   DCHECK(audio_manager);
   DCHECK(sync_writer);
 
   if (!params.IsValid() || (params.channels() > kMaxInputChannels))
     return NULL;
 
   // Create the AudioInputController object and ensure that it runs on
   // the audio-manager thread.
   scoped_refptr<AudioInputController> controller(
       new AudioInputController(event_handler, sync_writer, user_input_monitor));
   controller->task_runner_ = audio_manager->GetTaskRunner();
 
   // Create and open a new audio input stream from the existing
   // audio-device thread. Use the provided audio-input device.
-  if (!controller->task_runner_->PostTask(FROM_HERE,
-          base::Bind(&AudioInputController::DoCreateForLowLatency, controller,
-                     base::Unretained(audio_manager), params, device_id))) {
+  if (!controller->task_runner_->PostTask(
+          FROM_HERE,
+          base::Bind(&AudioInputController::DoCreateForLowLatency,
+                     controller,
+                     base::Unretained(audio_manager),
+                     params,
+                     device_id))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::CreateForStream(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     EventHandler* event_handler,
@@ skipping 46 matching lines @@
 void AudioInputController::SetAutomaticGainControl(bool enabled) {
   task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioInputController::DoSetAutomaticGainControl, this, enabled));
 }
 
 void AudioInputController::DoCreate(AudioManager* audio_manager,
                                     const AudioParameters& params,
                                     const std::string& device_id) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.CreateTime");
+  if (handler_)
+    handler_->OnLog(this, "AIC::DoCreate");
 
 #if defined(AUDIO_POWER_MONITORING)
   // Create the audio (power) level meter given the provided audio parameters.
   // An AudioBus is also needed to wrap the raw data buffer from the native
   // layer to match AudioPowerMonitor::Scan().
   // TODO(henrika): Remove use of extra AudioBus. See http://crbug.com/375155.
+  last_audio_level_log_time_ = base::TimeTicks::Now();
   audio_level_.reset(new media::AudioPowerMonitor(
       params.sample_rate(),
       TimeDelta::FromMilliseconds(kPowerMeasurementTimeConstantMilliseconds)));
   audio_params_ = params;
   silence_state_ = SILENCE_STATE_NO_MEASUREMENT;
 #endif
 
   // TODO(miu): See TODO at top of file.  Until that's resolved, assume all
   // platform audio input requires the |no_data_timer_| be used to auto-detect
   // errors.  In reality, probably only Windows needs to be treated as
@@ skipping 69 matching lines @@
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.RecordTime");
 
   if (state_ != CREATED)
     return;
 
   {
     base::AutoLock auto_lock(lock_);
     state_ = RECORDING;
   }
 
+  if (handler_)
+    handler_->OnLog(this, "AIC::DoRecord");
+
   if (no_data_timer_) {
     // Start the data timer. Once |kTimerResetIntervalSeconds| have passed,
     // a callback to FirstCheckForNoData() is made.
     no_data_timer_->Reset();
   }
 
   stream_->Start(this);
   if (handler_)
     handler_->OnRecording(this);
 }
 
 void AudioInputController::DoClose() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.CloseTime");
 
   if (state_ == CLOSED)
     return;
 
+  if (handler_)
+    handler_->OnLog(this, "AIC::DoClose");
+
   // Delete the timer on the same thread that created it.
   no_data_timer_.reset();
 
   DoStopCloseAndClearStream();
   SetDataIsActive(false);
 
   if (SharedMemoryAndSyncSocketMode())
     sync_writer_->Close();
 
   if (user_input_monitor_)
@@ skipping 47 matching lines @@
     return;
 
   stream_->SetAutomaticGainControl(enabled);
 }
 
 void AudioInputController::FirstCheckForNoData() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   LogCaptureStartupResult(GetDataIsActive() ?
                           CAPTURE_STARTUP_OK :
                           CAPTURE_STARTUP_NO_DATA_CALLBACK);
+  if (handler_) {
+    handler_->OnLog(this, GetDataIsActive() ?
+                    "AIC::FirstCheckForNoData => data is active" :
+                    "AIC::FirstCheckForNoData => data is NOT active");
+  }
   DoCheckForNoData();
 }
 
 void AudioInputController::DoCheckForNoData() {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (!GetDataIsActive()) {
     // The data-is-active marker will be false only if it has been more than
     // one second since a data packet was recorded. This can happen if a
     // capture device has been removed or disabled.
@@ skipping 167 matching lines @@
 }
 
 void AudioInputController::LogSilenceState(SilenceState value) {
   UMA_HISTOGRAM_ENUMERATION("Media.AudioInputControllerSessionSilenceReport",
                             value,
                             SILENCE_STATE_MAX + 1);
 }
 #endif
 
 }  // namespace media