--- rtptools-1.18\rtpdump.c	2002-09-10 12:30:54.000000000 +0200
+++ rtptools\rtpdump.c	2008-07-03 17:13:00.729618100 +0200
@@ -54,7 +54,7 @@
 static char rcsid[] = "$Id: rtpdump.c,v 1.6 2002/09/10 10:30:54 at541 Exp $";
 
 typedef enum {F_invalid, F_dump, F_header, F_hex, F_rtcp, F_short,
-   F_payload, F_ascii} t_format;
+   F_payload, F_ascii, F_itut} t_format;
 
 /*
 * Payload type map.
@@ -68,7 +68,7 @@
 static void usage(char *argv0)
 {
   fprintf(stderr, 
-"Usage: %s [-F [hex|ascii|rtcp|short|payload|dump|header] [-t minutes]\
+"Usage: %s [-F [hex|ascii|rtcp|short|payload|dump|header|itut] [-t minutes]\
  [-o outputfile] [-f inputfile] [-x bytes] [multicast]/port > file\n", 
   argv0);
 }
@@ -100,6 +100,120 @@
   }
 } /* hex */
 
+#define BIT_0     (	short)0x007f	/* definition of zero-bit in bit-stream      */
+#define BIT_1		(short)0x0081	/* definition of one-bit in bit-stream       */
+#define SYNC_WORD	(short)0x6b21	/* definition of frame erasure flag          */
+#define RATE_8000	80				/* number of speech bits                     */
+#define RATE_0		0				/* 0 bit/s rate                  */
+#define RATE_SID_OCTET    16		/* number of bits in Octet Transmission mode */
+
+typedef  short int   Word16   ;
+
+/*----------------------------------------------------------------------------
+ * ntoitut convert network packet to itut format
+ *----------------------------------------------------------------------------
+ */
+static void ntoitut(char *input, int no_of_bits, Word16 *bitstream)
+{
+	Word16 iii, bit, mask_bit;
+
+	for (iii = 0 ; iii < no_of_bits ; iii++) {
+		mask_bit = iii % 8;
+		if ((iii > 0) && (mask_bit == 0)) {
+			input++;
+		}
+		bit = *input & (1 << (7 - mask_bit));      /* get bit */
+		if (bit == 0) {
+			*bitstream++ = BIT_0;
+		}
+		else {
+			*bitstream++ = BIT_1;
+		}
+   }
+}
+
+/*
+ * Print buffer 'data' of length 'len' bytes in itut format to file 'out'.
+ * The 'header' with length 'hlen' is needed.
+ * Doesn't support G729D and G729E
+ * Return 0 if failed, 1 otherwise.
+ */
+static int itut(FILE *out, char *header, int hlen, char *data, int len)
+{
+	int iii;
+	int bits = 0;
+	long missing;
+	Word16 wordBuffer[RATE_8000+2];
+	rtp_hdr_t *r = (rtp_hdr_t *)header;
+	unsigned long ts = ntohl(r->ts);
+	static unsigned int oldLen = 0;
+	static unsigned long oldTs = 0;
+	static char first = 1;
+	int ptr = 0;
+
+	if (strcmp(pt_map[r->pt].enc, "G729") != 0) {
+		return 0;
+	}
+	if (pt_map[r->pt].ch != 1) {
+		return 0;
+	}
+	if (pt_map[r->pt].rate != 8000) {
+		return 0;
+	}
+
+	if (first) {
+		oldLen = len;
+		oldTs = ts;
+		first = 0;
+	}
+
+	// Count packets lost or silent
+	if (ts >= oldTs) {
+		missing = ((ts - oldTs) / 80) - (oldLen / 10);
+	}
+	else {
+		missing = ((ts - (0xFFFFFFFF - oldTs) + 1) / 80) - (oldLen / 10);
+	}
+	// We don't need to insert empty packet if we have a SID frame
+	if ((oldLen % 10) == 2) {
+		missing--;
+	}
+
+	// Replace non existing or silent packets with empty packet in the output bitstream
+	for (iii = 0 ; iii < missing ; iii++) {
+		wordBuffer[0] = SYNC_WORD;			// sync
+		wordBuffer[1] = RATE_0;				// length = 0
+		fwrite(wordBuffer, sizeof(Word16), RATE_0 + 2, out);
+	}
+
+	oldLen = len;
+	oldTs = ts;
+
+	// Speech packets
+	while (len >= 10) {
+		wordBuffer[0] = SYNC_WORD;			// sync
+		wordBuffer[1] = RATE_8000;			// length
+		ntoitut(&data[ptr], RATE_8000, &wordBuffer[2]);
+		fwrite(wordBuffer, sizeof(Word16), RATE_8000 + 2, out);
+
+		ptr += 10;
+		len -= 10;
+	}
+
+	// SID frames
+	while (len >= 2) {
+		wordBuffer[0] = SYNC_WORD;			// sync
+		wordBuffer[1] = RATE_SID_OCTET;		// length
+		ntoitut(&data[ptr], RATE_SID_OCTET, &wordBuffer[2]);
+		fwrite(wordBuffer, sizeof(Word16), RATE_SID_OCTET + 2, out);
+
+		ptr += 2;
+		len -= 2;
+	}
+
+	return 1;
+} /* itut */
+
 
 /*
 * Open network sockets.
@@ -562,6 +676,13 @@
       }
       break;
 
+    case F_itut:
+      if (ctrl == 0) {
+        hlen = parse_header(packet->p.data);
+        itut(out, packet->p.data, hlen, packet->p.data + hlen, trunc < len ? trunc : len - hlen);
+      }
+      break;
+
     case F_short:
       if (ctrl == 0) parse_short(out, now, packet->p.data, len);
       break;
@@ -609,6 +730,7 @@
     {"short",   F_short},
     {"payload", F_payload},
     {"ascii",   F_ascii},
+    {"itut",    F_itut},
     {0,0} 
   };
   t_format format = F_ascii;