audio: use av_samples_set_silence

Change-Id: Ia2f2eada788e6dd81e2442a0f384943ea3efa8ad

src/media/audio/audioloop.cpp

@@ -65,6 +65,7 @@ AudioLoop::getNext(AVFrame* output, bool mute)
 
     if (buf_samples == 0) {
         JAMI_ERR("Audio loop size is 0");
+        av_samples_set_silence(output->data, 0, output->nb_samples, format_.nb_channels, format_.sampleFormat);
         return;
     } else if (pos >= buf_samples) {
         JAMI_ERR("Invalid loop position %zu", pos);

src/media/audio/opensl/audio_player.cpp

@@ -168,7 +168,7 @@ AudioPlayer::AudioPlayer(jami::AudioFormat sampleFormat,
 
     silentBuf_ = {(format_pcm.containerSize >> 3) * format_pcm.numChannels * bufSize};
     silentBuf_.size_ = silentBuf_.cap_;
-    memset(silentBuf_.buf_, 0, silentBuf_.cap_);
+    av_samples_set_silence(&silentBuf_.buf_, 0, (int)bufSize, (int)sampleInfo_.nb_channels, sampleInfo_.sampleFormat);
 }
 
 AudioPlayer::~AudioPlayer()

src/media/audio/opensl/audio_recorder.cpp

@@ -202,7 +202,7 @@ AudioRecorder::AudioRecorder(jami::AudioFormat sampleFormat, size_t bufSize, SLE
 
     silentBuf_ = {(format_pcm.containerSize >> 3) * format_pcm.numChannels * bufSize};
     silentBuf_.size_ = silentBuf_.cap_;
-    memset(silentBuf_.buf_, 0, silentBuf_.cap_);
+    av_samples_set_silence(&silentBuf_.buf_, 0, (int)bufSize, (int)sampleInfo_.nb_channels, sampleInfo_.sampleFormat);
 }
 
 bool