1 files changed, 18 insertions, 1 deletions
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index d0614f4..5053e87 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -12,7 +12,8 @@ const char AudioManagerBase::kDefaultDeviceName[] = "Default";
 
 AudioManagerBase::AudioManagerBase()
     : audio_thread_("AudioThread"),
-      initialized_(false) {
+      initialized_(false),
+      num_active_input_streams_(0) {
 }
 
 AudioManagerBase::~AudioManagerBase() {
@@ -62,3 +63,19 @@ void AudioManagerBase::ShowAudioInputSettings() {
 void AudioManagerBase::GetAudioInputDeviceNames(
     media::AudioDeviceNames* device_names) {
 }
+
+void AudioManagerBase::IncreaseActiveInputStreamCount() {
+  base::AutoLock auto_lock(active_input_streams_lock_);
+  ++num_active_input_streams_;
+}
+
+void AudioManagerBase::DecreaseActiveInputStreamCount() {
+  base::AutoLock auto_lock(active_input_streams_lock_);
+  DCHECK_GT(num_active_input_streams_, 0);
+  --num_active_input_streams_;
+}
+
+bool AudioManagerBase::IsRecordingInProcess() {
+  base::AutoLock auto_lock(active_input_streams_lock_);
+  return num_active_input_streams_ > 0;
+}