Avoids invalid copy of audio buffer to task queue

webrtc/modules/audio_device/audio_device_buffer.h

Index: webrtc/modules/audio_device/audio_device_buffer.h
diff --git a/webrtc/modules/audio_device/audio_device_buffer.h b/webrtc/modules/audio_device/audio_device_buffer.h
index 5805db7743c7f7ccc43d4c84ee1604dfa019d33f..6967ebd757147762b5291abd25d8c1a7940e0b0e 100644
--- a/webrtc/modules/audio_device/audio_device_buffer.h
+++ b/webrtc/modules/audio_device/audio_device_buffer.h
@@ -86,8 +86,8 @@ class AudioDeviceBuffer {
   // Updates counters in each play/record callback but does it on the task
   // queue to ensure that they can be read by LogStats() without any locks since
   // each task is serialized by the task queue.
-  void UpdateRecStats(const void* audio_buffer, size_t num_samples);
-  void UpdatePlayStats(const void* audio_buffer, size_t num_samples);
+  void UpdateRecStats(int16_t max_abs, size_t num_samples);
+  void UpdatePlayStats(int16_t max_abs, size_t num_samples);
 
   // Ensures that methods are called on the same thread as the thread that
   // creates this object.
@@ -202,6 +202,12 @@ class AudioDeviceBuffer {
   // (two per second) in a row equals zero. The member is only incremented on
   // the task queue and max once every 10th second.
   size_t num_rec_level_is_zero_;
+
+  // Counts number of audio callbacks modulo 50 to create a signal when
+  // a new storage of audio stats shall be done.
+  // Only updated on the OS-specific audio thread that drives audio.
+  int16_t rec_stat_count_;
+  int16_t play_stat_count_;
 };
 
 }  // namespace webrtc