Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/redphone/Clock.h

@@ -0,0 +1,34 @@
+#ifndef __CLOCK_H__
+#define __CLOCK_H__
+
+#include "AudioCodec.h"
+
+#include <android/log.h>
+
+class Clock {
+
+private:
+  volatile uint32_t tickCount;
+
+  uint32_t dataReceived;
+
+public:
+  Clock() : tickCount(0), dataReceived(0) {}
+
+  uint32_t tick(int frames) {
+    tickCount += (frames * SPEEX_FRAME_SIZE);
+    return tickCount;
+  }
+
+  uint32_t getTickCount() {
+    return tickCount;
+  }
+
+  uint32_t getImprovisedTimestamp(int dataLen) {
+    dataReceived += dataLen;
+    return (dataReceived / SPEEX_ENCODED_FRAME_SIZE) * SPEEX_FRAME_SIZE;
+  }
+
+};
+
+#endif