NetEq: Implement Expand::Muted

webrtc/modules/audio_coding/neteq/expand.cc

Index: webrtc/modules/audio_coding/neteq/expand.cc
diff --git a/webrtc/modules/audio_coding/neteq/expand.cc b/webrtc/modules/audio_coding/neteq/expand.cc
index 5cb18db462a7a260bf6aa56880be0a27b81b19c7..4c17fd558de29dc51fae4ab831071a0b90a89f95 100644
--- a/webrtc/modules/audio_coding/neteq/expand.cc
+++ b/webrtc/modules/audio_coding/neteq/expand.cc
@@ -327,6 +327,17 @@ void Expand::SetParametersForMergeAfterExpand() {
   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_;
 }