Update a ton of audio code to use size_t more correctly and in general reduce

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,
-                            int num_frames,
+                            size_t num_frames,
                             int num_input_channels,
                             int 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
@@ skipping 17 matching lines @@
 // 2. Instantiate a Blocker object |b|, passing in |bc|.
 // 3. As you receive audio, call b.ProcessChunk() to get processed audio.
 //
 // 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(int chunk_size,
-          int block_size,
+  Blocker(size_t chunk_size,
+          size_t block_size,
           int num_input_channels,
           int num_output_channels,
           const float* window,
-          int shift_amount,
+          size_t shift_amount,
           BlockerCallback* callback);
 
   void ProcessChunk(const float* const* input,
-                    int chunk_size,
+                    size_t chunk_size,
                     int num_input_channels,
                     int num_output_channels,
                     float* const* output);
 
  private:
-  const int chunk_size_;
-  const int block_size_;
+  const size_t chunk_size_;
+  const size_t block_size_;
   const int num_input_channels_;
   const int num_output_channels_;
 
   // The number of frames of delay to add at the beginning of the first chunk.
-  const int initial_delay_;
+  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.
-  int frame_offset_;
+  size_t frame_offset_;
 
   // Since blocks nearly always overlap, there are certain blocks that require
   // frames from the end of one chunk and the beginning of the next chunk. The
   // input and output buffers are responsible for saving those frames between
   // calls to ProcessChunk().
   //
   // Both contain |initial delay| + |chunk_size| frames. The input is a fairly
   // standard FIFO, but due to the overlap-add it's harder to use an
   // AudioRingBuffer for the output.
   AudioRingBuffer input_buffer_;
   ChannelBuffer<float> output_buffer_;
 
   // Space for the input block (can't wrap because of windowing).
   ChannelBuffer<float> input_block_;
 
   // Space for the output block (can't wrap because of overlap/add).
   ChannelBuffer<float> output_block_;
 
   rtc::scoped_ptr<float[]> window_;
 
   // The amount of frames between the start of contiguous blocks. For example,
   // |shift_amount_| = |block_size_| / 2 for a Hann window.
-  int shift_amount_;
+  size_t shift_amount_;
 
   BlockerCallback* callback_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_INTERNAL_BEAMFORMER_BLOCKER_H_