Convert channel counts to size_t.

webrtc/common_audio/resampler/push_resampler.cc

 /*
  *  Copyright (c) 2013 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 14 matching lines @@
       num_channels_(0) {
 }
 
 template <typename T>
 PushResampler<T>::~PushResampler() {
 }
 
 template <typename T>
 int PushResampler<T>::InitializeIfNeeded(int src_sample_rate_hz,
                                          int dst_sample_rate_hz,
-                                         int num_channels) {
+                                         size_t num_channels) {
   if (src_sample_rate_hz == src_sample_rate_hz_ &&
       dst_sample_rate_hz == dst_sample_rate_hz_ &&
       num_channels == num_channels_)
     // No-op if settings haven't changed.
     return 0;
 
   if (src_sample_rate_hz <= 0 || dst_sample_rate_hz <= 0 ||
       num_channels <= 0 || num_channels > 2)
     return -1;
 
@@ skipping 15 matching lines @@
     sinc_resampler_right_.reset(new PushSincResampler(src_size_10ms_mono,
                                                       dst_size_10ms_mono));
   }
 
   return 0;
 }
 
 template <typename T>
 int PushResampler<T>::Resample(const T* src, size_t src_length, T* dst,
                                size_t dst_capacity) {
-  const size_t src_size_10ms =
-      static_cast<size_t>(src_sample_rate_hz_ * num_channels_ / 100);
-  const size_t dst_size_10ms =
-      static_cast<size_t>(dst_sample_rate_hz_ * num_channels_ / 100);
+  const size_t src_size_10ms = src_sample_rate_hz_ * num_channels_ / 100;
+  const size_t dst_size_10ms = dst_sample_rate_hz_ * num_channels_ / 100;
   if (src_length != src_size_10ms || dst_capacity < dst_size_10ms)
     return -1;
 
   if (src_sample_rate_hz_ == dst_sample_rate_hz_) {
     // The old resampler provides this memcpy facility in the case of matching
     // sample rates, so reproduce it here for the sinc resampler.
     memcpy(dst, src, src_length * sizeof(T));
     return static_cast<int>(src_length);
   }
   if (num_channels_ == 2) {
@@ skipping 16 matching lines @@
     return static_cast<int>(
         sinc_resampler_->Resample(src, src_length, dst, dst_capacity));
   }
 }
 
 // Explictly generate required instantiations.
 template class PushResampler<int16_t>;
 template class PushResampler<float>;
 
 }  // namespace webrtc