[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/echo_control_mobile_impl.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.
  */
 
@@ skipping 72 matching lines @@
     return apm_->kNoError;
   }
 
   assert(audio->num_frames_per_band() <= 160);
   assert(audio->num_channels() == apm_->num_reverse_channels());
 
   int err = apm_->kNoError;
 
   // The ordering convention must be followed to pass to the correct AECM.
   size_t handle_index = 0;
-  for (int i = 0; i < apm_->num_output_channels(); i++) {
-    for (int j = 0; j < audio->num_channels(); j++) {
+  for (size_t i = 0; i < apm_->num_output_channels(); i++) {
+    for (size_t j = 0; j < audio->num_channels(); j++) {
       Handle* my_handle = static_cast<Handle*>(handle(handle_index));
       err = WebRtcAecm_BufferFarend(
           my_handle,
           audio->split_bands_const(j)[kBand0To8kHz],
           audio->num_frames_per_band());
 
       if (err != apm_->kNoError) {
         return GetHandleError(my_handle);  // TODO(ajm): warning possible?
       }
 
@@ skipping 13 matching lines @@
     return apm_->kStreamParameterNotSetError;
   }
 
   assert(audio->num_frames_per_band() <= 160);
   assert(audio->num_channels() == apm_->num_output_channels());
 
   int err = apm_->kNoError;
 
   // The ordering convention must be followed to pass to the correct AECM.
   size_t handle_index = 0;
-  for (int i = 0; i < audio->num_channels(); i++) {
+  for (size_t i = 0; i < audio->num_channels(); i++) {
     // TODO(ajm): improve how this works, possibly inside AECM.
     //            This is kind of hacked up.
     const int16_t* noisy = audio->low_pass_reference(i);
     const int16_t* clean = audio->split_bands_const(i)[kBand0To8kHz];
     if (noisy == NULL) {
       noisy = clean;
       clean = NULL;
     }
-    for (int j = 0; j < apm_->num_reverse_channels(); j++) {
+    for (size_t j = 0; j < apm_->num_reverse_channels(); j++) {
       Handle* my_handle = static_cast<Handle*>(handle(handle_index));
       err = WebRtcAecm_Process(
           my_handle,
           noisy,
           clean,
           audio->split_bands(i)[kBand0To8kHz],
           audio->num_frames_per_band(),
           apm_->stream_delay_ms());
 
       if (err != apm_->kNoError) {
@@ skipping 127 matching lines @@
 }
 
 int EchoControlMobileImpl::ConfigureHandle(void* handle) const {
   AecmConfig config;
   config.cngMode = comfort_noise_enabled_;
   config.echoMode = MapSetting(routing_mode_);
 
   return WebRtcAecm_set_config(static_cast<Handle*>(handle), config);
 }
 
-int EchoControlMobileImpl::num_handles_required() const {
+size_t EchoControlMobileImpl::num_handles_required() const {
   return apm_->num_output_channels() *
          apm_->num_reverse_channels();
 }
 
 int EchoControlMobileImpl::GetHandleError(void* handle) const {
   assert(handle != NULL);
   return MapError(WebRtcAecm_get_error_code(static_cast<Handle*>(handle)));
 }
 }  // namespace webrtc