Send data from mixer to APM limiter more often.

webrtc/modules/audio_mixer/audio_mixer_impl.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 123 matching lines @@
 
 void AudioMixerImpl::Mix(size_t number_of_channels,
                          AudioFrame* audio_frame_for_mixing) {
   RTC_DCHECK(number_of_channels == 1 || number_of_channels == 2);
   RTC_DCHECK_RUNS_SERIALIZED(&race_checker_);
 
   CalculateOutputFrequency();
 
   {
     rtc::CritScope lock(&crit_);
+    const int number_of_streams = audio_source_list_.size();
     frame_combiner_.Combine(GetAudioFromSources(), number_of_channels,
-                            OutputFrequency(), audio_frame_for_mixing);
+                            OutputFrequency(), number_of_streams,
+                            audio_frame_for_mixing);
   }
 
   return;
 }
 
 void AudioMixerImpl::CalculateOutputFrequency() {
   RTC_DCHECK_RUNS_SERIALIZED(&race_checker_);
   rtc::CritScope lock(&crit_);
 
   std::vector<int> preferred_rates;
@@ skipping 87 matching lines @@
 
   const auto iter = FindSourceInList(audio_source, &audio_source_list_);
   if (iter != audio_source_list_.end()) {
     return (*iter)->is_mixed;
   }
 
   LOG(LS_ERROR) << "Audio source unknown";
   return false;
 }
 }  // namespace webrtc