Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/redphone/RtpAudioSender.h

@@ -0,0 +1,35 @@
+#ifndef __RTP_AUDIO_SENDER_H__
+#define __RTP_AUDIO_SENDER_H__
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+//#include "srtp.h"
+
+#include "SrtpStream.h"
+
+class RtpAudioSender {
+private:
+  int      socketFd;
+  uint32_t sequenceNumber;
+
+  struct sockaddr *sockAddr;
+  int             sockAddrLen;
+
+  SrtpStream      srtpStream;
+
+public:
+  RtpAudioSender(int socketFd, struct sockaddr *sockAddr, int sockAddrLen,
+                 SrtpStreamParameters *parameters);
+
+//  ~RtpAudioSender();
+
+  int init();
+  int send(int timestamp, char *encodedData, int encodedDataLen);
+
+};
+
+
+#endif