[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/voice_engine/output_mixer.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.
  */
 
 #include "webrtc/voice_engine/output_mixer.h"
 
+#include "webrtc/base/format_macros.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/utility/interface/audio_frame_operations.h"
 #include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/interface/file_wrapper.h"
 #include "webrtc/system_wrappers/interface/trace.h"
 #include "webrtc/voice_engine/include/voe_external_media.h"
 #include "webrtc/voice_engine/statistics.h"
 #include "webrtc/voice_engine/utility.h"
 
 namespace webrtc {
@@ skipping 432 matching lines @@
     }
     _outputFileRecorderPtr->RegisterModuleFileCallback(NULL);
     FileRecorder::DestroyFileRecorder(_outputFileRecorderPtr);
     _outputFileRecorderPtr = NULL;
     _outputFileRecording = false;
 
     return 0;
 }
 
 int OutputMixer::GetMixedAudio(int sample_rate_hz,
-                               int num_channels,
+                               size_t num_channels,
                                AudioFrame* frame) {
-  WEBRTC_TRACE(kTraceStream, kTraceVoice, VoEId(_instanceId,-1),
-               "OutputMixer::GetMixedAudio(sample_rate_hz=%d, num_channels=%d)",
-               sample_rate_hz, num_channels);
+  WEBRTC_TRACE(
+      kTraceStream, kTraceVoice, VoEId(_instanceId,-1),
+      "OutputMixer::GetMixedAudio(sample_rate_hz=%d, num_channels=%" PRIuS ")",
+      sample_rate_hz, num_channels);
 
   // --- Record playout if enabled
   {
     CriticalSectionScoped cs(&_fileCritSect);
     if (_outputFileRecording && _outputFileRecorderPtr)
       _outputFileRecorderPtr->RecordAudioToFile(_audioFrame);
   }
 
   frame->num_channels_ = num_channels;
   frame->sample_rate_hz_ = sample_rate_hz;
@@ skipping 122 matching lines @@
             _audioFrame.data_[2 * i + 1] = 0;
         }
     }
     assert(_audioFrame.samples_per_channel_ == toneSamples);
 
     return 0;
 }
 
 }  // namespace voe
 }  // namespace webrtc