* examples/rtp_check_cc.c: New example to check the RTP counter.

examples/Makefile

@@ -2,7 +2,7 @@
 
 CFLAGS = -Wall -O2 -g
 LDFLAGS = 
-OBJ = dvb_print_si dvb_ecmg dvb_ecmg_test mpeg_print_pcr
+OBJ = dvb_print_si dvb_ecmg dvb_ecmg_test mpeg_print_pcr rtp_check_cc
 
 all: $(OBJ)
 

examples/rtp_check_cc.c

+/*****************************************************************************
+ * rtp_check_cc.c: Prints RTP discontinuities
+ *****************************************************************************
+ * Copyright (C) 2011 VideoLAN
+ * $Id: dvb_print_si.c 27 2011-04-10 16:57:59Z massiot $
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ *
+ * This program is free software. It comes without any warranty, to
+ * the extent permitted by applicable law. You can redistribute it
+ * and/or modify it under the terms of the Do What The Fuck You Want
+ * To Public License, Version 2, as published by Sam Hocevar. See
+ * http://sam.zoy.org/wtfpl/COPYING for more details.
+ *****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <bitstream/ietf/rtp.h>
+
+/*****************************************************************************
+ * Local declarations
+ *****************************************************************************/
+#define DEFAULT_PACKET_SIZE 1328
+
+/*****************************************************************************
+ * Main loop
+ *****************************************************************************/
+static void usage(const char *psz)
+{
+    fprintf(stderr, "usage: multicat -u -m <packet size> @<addr>:<port> | %s [<packet size>]\n", psz);
+    exit(EXIT_FAILURE);
+}
+
+int main(int i_argc, char **ppsz_argv)
+{
+    int i_packet_size = DEFAULT_PACKET_SIZE;
+
+    if (ppsz_argv[1] != NULL &&
+        (!strcmp(ppsz_argv[1], "-h") || !strcmp(ppsz_argv[1], "--help")))
+        usage(ppsz_argv[0]);
+
+    if (ppsz_argv[1] != NULL)
+        i_packet_size = atoi(ppsz_argv[1]);
+    if (i_packet_size > 65535 || i_packet_size < RTP_HEADER_SIZE)
+        usage(ppsz_argv[0]);
+
+    uint8_t p_buffer[i_packet_size];
+    uint16_t i_cc = 0;
+
+    for ( ; ; ) {
+        ssize_t toto;
+        if ((toto=read(STDIN_FILENO, p_buffer, i_packet_size)) != i_packet_size) {
+            fprintf(stderr, "couldn't read %zd\n", toto);
+            exit(EXIT_FAILURE);
+        }
+
+        if (!rtp_check_hdr(p_buffer)) {
+            fprintf(stderr, "invalid RTP header\n");
+            continue;
+        }
+
+        uint16_t i_new_cc = rtp_get_cc(p_buffer);
+        if (i_new_cc != i_cc)
+            fprintf(stderr, "received packet %hu while expecting %hu\n",
+                    i_new_cc, i_cc);
+        i_cc = (i_new_cc + 1) % 65536;
+    }
+}