[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.h

 /*
  *  Copyright (c) 2014 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 41 matching lines @@
   // After processing each block |is_target_present_| is set to true if the
   // target signal es present and to false otherwise. This methods can be called
   // to know if the data is target signal or interference and process it
   // accordingly.
   bool is_target_present() override { return is_target_present_; }
 
  protected:
   // Process one frequency-domain block of audio. This is where the fun
   // happens. Implements LappedTransform::Callback.
   void ProcessAudioBlock(const complex<float>* const* input,
-                         int num_input_channels,
+                         size_t num_input_channels,
                          size_t num_freq_bins,
-                         int num_output_channels,
+                         size_t num_output_channels,
                          complex<float>* const* output) override;
 
  private:
   typedef Matrix<float> MatrixF;
   typedef ComplexMatrix<float> ComplexMatrixF;
   typedef complex<float> complex_f;
 
   void InitDelaySumMasks();
   void InitTargetCovMats();  // TODO(aluebs): Make this depend on target angle.
   void InitInterfCovMats();
@@ skipping 34 matching lines @@
 
   static const size_t kFftSize = 256;
   static const size_t kNumFreqBins = kFftSize / 2 + 1;
 
   // Deals with the fft transform and blocking.
   size_t chunk_length_;
   rtc::scoped_ptr<LappedTransform> lapped_transform_;
   float window_[kFftSize];
 
   // Parameters exposed to the user.
-  const int num_input_channels_;
+  const size_t num_input_channels_;
   int sample_rate_hz_;
 
   const std::vector<Point> array_geometry_;
 
   // Calculated based on user-input and constants in the .cc file.
   size_t low_mean_start_bin_;
   size_t low_mean_end_bin_;
   size_t high_mean_start_bin_;
   size_t high_mean_end_bin_;
 
@@ skipping 38 matching lines @@
   // Number of blocks after which the data is considered interference if the
   // mask does not pass |kMaskSignalThreshold|.
   size_t hold_target_blocks_;
   // Number of blocks since the last mask that passed |kMaskSignalThreshold|.
   size_t interference_blocks_count_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_NONLINEAR_BEAMFORMER_H_