memset(&analog, 0, sizeof(struct sr_datafeed_analog));
analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
analog.unit = SR_UNIT_DECIBEL_SPL;
memset(&analog, 0, sizeof(struct sr_datafeed_analog));
analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
analog.unit = SR_UNIT_DECIBEL_SPL;