Reset indexer upon initialization in AudioLoop.

webrtc/modules/audio_coding/neteq/tools/audio_loop.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 22 matching lines @@
   if (block_length_samples > samples_read) return false;
 
   // Add an extra block length of samples to the end of the array, starting
   // over again from the beginning of the array. This is done to simplify
   // the reading process when reading over the end of the loop.
   memcpy(&audio_array_[samples_read], audio_array_.get(),
          block_length_samples * sizeof(int16_t));
 
   loop_length_samples_ = samples_read;
   block_length_samples_ = block_length_samples;
+  next_index_ = 0;
   return true;
 }
 
 rtc::ArrayView<const int16_t> AudioLoop::GetNextBlock() {
   // Check that the AudioLoop is initialized.
   if (block_length_samples_ == 0)
     return rtc::ArrayView<const int16_t>();
 
   const int16_t* output_ptr = &audio_array_[next_index_];
   next_index_ = (next_index_ + block_length_samples_) % loop_length_samples_;
   return rtc::ArrayView<const int16_t>(output_ptr, block_length_samples_);
 }
 
 
 }  // namespace test
 }  // namespace webrtc