#include "avformat.h"
#include <unistd.h>
+#include <stdarg.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
* get the local port first, then you must call this function to set
* the remote server address.
*
- * url syntax: rtp://host:port[?option=val...]
- * option: 'multicast=1' : enable multicast
- * 'ttl=n' : set the ttl value (for multicast only)
- *
* @param s1 media file context
* @param uri of the remote server
* @return zero if no error.
RTPContext *s = h->priv_data;
char hostname[256];
int port;
+
char buf[1024];
char path[1024];
}
+/* add option to url of the form:
+ "http://host:port/path?option1=val1&option2=val2... */
+void url_add_option(char *buf, int buf_size, const char *fmt, ...)
+{
+ char buf1[1024];
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (strchr(buf, '?'))
+ pstrcat(buf, buf_size, "&");
+ else
+ pstrcat(buf, buf_size, "?");
+ vsnprintf(buf1, sizeof(buf1), fmt, ap);
+ pstrcat(buf, buf_size, buf1);
+ va_end(ap);
+}
+
+void build_udp_url(char *buf, int buf_size,
+ const char *hostname, int port,
+ int local_port, int multicast, int ttl)
+{
+ snprintf(buf, buf_size, "udp://%s:%d", hostname, port);
+ if (local_port >= 0)
+ url_add_option(buf, buf_size, "localport=%d", local_port);
+ if (multicast)
+ url_add_option(buf, buf_size, "multicast=1", multicast);
+ if (ttl >= 0)
+ url_add_option(buf, buf_size, "ttl=%d", ttl);
+}
+
+/*
+ * url syntax: rtp://host:port[?option=val...]
+ * option: 'multicast=1' : enable multicast
+ * 'ttl=n' : set the ttl value (for multicast only)
+ * 'localport=n' : set the local port to n
+ *
+ */
static int rtp_open(URLContext *h, const char *uri, int flags)
{
RTPContext *s;
- int port, is_output, local_port;
+ int port, is_output, is_multicast, ttl, local_port;
char hostname[256];
char buf[1024];
char path[1024];
- URLContext *tmp_hd;
+ const char *p;
is_output = (flags & URL_WRONLY);
url_split(NULL, 0, hostname, sizeof(hostname), &port,
path, sizeof(path), uri);
+ /* extract parameters */
+ is_multicast = 0;
+ ttl = -1;
+ local_port = -1;
+ p = strchr(uri, '?');
+ if (p) {
+ is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
+ if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
+ ttl = strtol(buf, NULL, 10);
+ }
+ if (find_info_tag(buf, sizeof(buf), "localport", p)) {
+ local_port = strtol(buf, NULL, 10);
+ }
+ }
- snprintf(buf, sizeof(buf), "udp://%s:%d%s",
- hostname, port, path);
+ build_udp_url(buf, sizeof(buf),
+ hostname, port, local_port, is_multicast, ttl);
if (url_open(&s->rtp_hd, buf, flags) < 0)
goto fail;
local_port = udp_get_local_port(s->rtp_hd);
/* well, should suppress localport in path */
- snprintf(buf, sizeof(buf), "udp://%s:%d%s%clocalport=%d",
- hostname, port + 1, path,
- strchr(path, '?') != NULL ? '&' : '?',
- local_port + 1);
+ build_udp_url(buf, sizeof(buf),
+ hostname, port + 1, local_port + 1, is_multicast, ttl);
if (url_open(&s->rtcp_hd, buf, flags) < 0)
goto fail;
static int rtp_write(URLContext *h, UINT8 *buf, int size)
{
RTPContext *s = h->priv_data;
- int ret, fd;
+ int ret;
URLContext *hd;
if (buf[1] >= 200 && buf[1] <= 204) {