[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/common_audio/blocker.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.
  */
 
 #ifndef WEBRTC_INTERNAL_BEAMFORMER_BLOCKER_H_
 #define WEBRTC_INTERNAL_BEAMFORMER_BLOCKER_H_
 
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_audio/audio_ring_buffer.h"
 #include "webrtc/common_audio/channel_buffer.h"
 
 namespace webrtc {
 
 // The callback function to process audio in the time domain. Input has already
 // been windowed, and output will be windowed. The number of input channels
 // must be >= the number of output channels.
 class BlockerCallback {
  public:
   virtual ~BlockerCallback() {}
 
   virtual void ProcessBlock(const float* const* input,
                             size_t num_frames,
-                            int num_input_channels,
-                            int num_output_channels,
+                            size_t num_input_channels,
+                            size_t num_output_channels,
                             float* const* output) = 0;
 };
 
 // The main purpose of Blocker is to abstract away the fact that often we
 // receive a different number of audio frames than our transform takes. For
 // example, most FFTs work best when the fft-size is a power of 2, but suppose
 // we receive 20ms of audio at a sample rate of 48000. That comes to 960 frames
 // of audio, which is not a power of 2. Blocker allows us to specify the
 // transform and all other necessary processing via the Process() callback
 // function without any constraints on the transform-size
@@ skipping 17 matching lines @@
 //
 // A small amount of delay is added to the first received chunk to deal with
 // the difference in chunk/block sizes. This delay is <= chunk_size.
 //
 // Ownership of window is retained by the caller.  That is, Blocker makes a
 // copy of window and does not attempt to delete it.
 class Blocker {
  public:
   Blocker(size_t chunk_size,
           size_t block_size,
-          int num_input_channels,
-          int num_output_channels,
+          size_t num_input_channels,
+          size_t num_output_channels,
           const float* window,
           size_t shift_amount,
           BlockerCallback* callback);
 
   void ProcessChunk(const float* const* input,
                     size_t chunk_size,
-                    int num_input_channels,
-                    int num_output_channels,
+                    size_t num_input_channels,
+                    size_t num_output_channels,
                     float* const* output);
 
  private:
   const size_t chunk_size_;
   const size_t block_size_;
-  const int num_input_channels_;
-  const int num_output_channels_;
+  const size_t num_input_channels_;
+  const size_t num_output_channels_;
 
   // The number of frames of delay to add at the beginning of the first chunk.
   const size_t initial_delay_;
 
   // The frame index into the input buffer where the first block should be read
   // from. This is necessary because shift_amount_ is not necessarily a
   // multiple of chunk_size_, so blocks won't line up at the start of the
   // buffer.
   size_t frame_offset_;
 
@@ skipping 19 matching lines @@
   // The amount of frames between the start of contiguous blocks. For example,
   // |shift_amount_| = |block_size_| / 2 for a Hann window.
   size_t shift_amount_;
 
   BlockerCallback* callback_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_INTERNAL_BEAMFORMER_BLOCKER_H_