NetEq: Implement muted output

webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc

Index: webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
diff --git a/webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc b/webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
index fdb66714cfbe20c465ae4f6f949237eb94ad50f7..3df49c1e0fe9525aa88ccde2de1fdeb4bbcc5289 100644
--- a/webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
+++ b/webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
@@ -605,7 +605,9 @@ int main(int argc, char* argv[]) {
     // Check if it is time to get output audio.
     while (time_now_ms >= next_output_time_ms && output_event_available) {
       webrtc::AudioFrame out_frame;
-      int error = neteq->GetAudio(&out_frame);
+      bool muted_output;
+      int error = neteq->GetAudio(&out_frame, &muted_output);
+      RTC_CHECK(!muted_output);
       if (error != NetEq::kOK) {
         std::cerr << "GetAudio returned error code " <<
             neteq->LastError() << std::endl;