Prepare to convert various types to size_t.

webrtc/modules/audio_coding/neteq/neteq_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 1502 matching lines @@
   const size_t required_samples = 240 * fs_mult_;  // Must have 30 ms.
   size_t num_channels = algorithm_buffer_->Channels();
   int borrowed_samples_per_channel = 0;
   int old_borrowed_samples_per_channel = 0;
   size_t decoded_length_per_channel = decoded_length / num_channels;
   if (decoded_length_per_channel < required_samples) {
     // Must move data from the |sync_buffer_| in order to get 30 ms.
     borrowed_samples_per_channel = static_cast<int>(required_samples -
         decoded_length_per_channel);
     // Calculate how many of these were already played out.
-    old_borrowed_samples_per_channel = static_cast<int>(
-        borrowed_samples_per_channel - sync_buffer_->FutureLength());
-    old_borrowed_samples_per_channel = std::max(
-        0, old_borrowed_samples_per_channel);
+    const int future_length = static_cast<int>(sync_buffer_->FutureLength());
+    old_borrowed_samples_per_channel =
+        (borrowed_samples_per_channel > future_length) ?
+        (borrowed_samples_per_channel - future_length) : 0;
     memmove(&decoded_buffer[borrowed_samples_per_channel * num_channels],
             decoded_buffer,
             sizeof(int16_t) * decoded_length);
     sync_buffer_->ReadInterleavedFromEnd(borrowed_samples_per_channel,
                                          decoded_buffer);
     decoded_length = required_samples * num_channels;
   }
 
   int16_t samples_added;
   PreemptiveExpand::ReturnCodes return_code = preemptive_expand_->Process(
@@ skipping 448 matching lines @@
 
 void NetEqImpl::CreateDecisionLogic() {
   decision_logic_.reset(DecisionLogic::Create(fs_hz_, output_size_samples_,
                                               playout_mode_,
                                               decoder_database_.get(),
                                               *packet_buffer_.get(),
                                               delay_manager_.get(),
                                               buffer_level_filter_.get()));
 }
 }  // namespace webrtc