public bool SetVolume(int volume) { if (this.MediaSessionMgr != null) { bool ok = MediaSessionMgr.producerSetInt32(twrap_media_type_t.twrap_media_audio, "volume", volume); ok &= MediaSessionMgr.consumerSetInt32(twrap_media_type_t.twrap_media_audio, "volume", volume); return(ok); } return(false); }