DV Serial: prepare multi slot (4)

sdrbase/dsp/dvserialworker.cpp

@@ -16,6 +16,7 @@
 ///////////////////////////////////////////////////////////////////////////////////
 
 #include <unistd.h>
+#include <sys/time.h>
 
 #include "dsp/dvserialworker.h"
 #include "audio/audiofifo.h"
@@ -182,3 +183,10 @@ void DVSerialWorker::upsample6(short *in, int nbSamplesIn, unsigned char channel
         m_fifoSlots[fifoSlot].m_upsamplerLastValue = in[i];
     }
 }
+
+long long DVSerialWorker::getUSecs()
+{
+    struct timeval tp;
+    gettimeofday(&tp, 0);
+    return (long long) tp.tv_sec * 1000000L + tp.tv_usec;
+}

sdrbase/dsp/dvserialworker.h

@@ -152,6 +152,7 @@ private:
     };
 
     void upsample6(short *in, int nbSamplesIn, unsigned char channels, unsigned int fifoSlot);
+    static long long getUSecs();
 
     SerialDV::DVController m_dvController;
     bool m_running;