NetEq: Implement Expand::Muted

webrtc/modules/audio_coding/neteq/expand.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 309 matching lines @@
   statistics_->LogDelayedPacketOutageEvent(
       rtc::checked_cast<int>(expand_duration_samples_) / (fs_hz_ / 1000));
 }
 
 void Expand::SetParametersForMergeAfterExpand() {
   current_lag_index_ = -1; /* out of the 3 possible ones */
   lag_index_direction_ = 1; /* make sure we get the "optimal" lag */
   stop_muting_ = true;
 }
 
+bool Expand::Muted() const {
+  if (first_expand_ || stop_muting_)
+    return false;
+  RTC_DCHECK(channel_parameters_);
+  for (size_t ch = 0; ch < num_channels_; ++ch) {
+    if (channel_parameters_[ch].mute_factor != 0)
+      return false;
+  }
+  return true;
+}
+
 size_t Expand::overlap_length() const {
   return overlap_length_;
 }
 
 void Expand::InitializeForAnExpandPeriod() {
   lag_index_direction_ = 1;
   current_lag_index_ = -1;
   stop_muting_ = false;
   random_vector_->set_seed_increment(1);
   consecutive_expands_ = 0;
@@ skipping 598 matching lines @@
   const size_t kMaxRandSamples = RandomVector::kRandomTableSize;
   while (samples_generated < length) {
     size_t rand_length = std::min(length - samples_generated, kMaxRandSamples);
     random_vector_->IncreaseSeedIncrement(seed_increment);
     random_vector_->Generate(rand_length, &random_vector[samples_generated]);
     samples_generated += rand_length;
   }
 }
 
 }  // namespace webrtc