rtsp: Accept options via private avoptions instead of URL options

Eventually, the old way of passing options by adding
stuff to the URL can be dropped.

This avoids having to tamper with the user-specified URL to
pass options on the transport mode. This also works better
with redirects, since the options don't need to be parsed out
from the URL.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/rtsp.c

@@ -59,9 +59,17 @@
 
 #define OFFSET(x) offsetof(RTSPState, x)
 #define DEC AV_OPT_FLAG_DECODING_PARAM
+#define ENC AV_OPT_FLAG_ENCODING_PARAM
 const AVOption ff_rtsp_options[] = {
     { "initial_pause",  "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {0}, 0, 1, DEC },
     FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
+    { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
+    { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
+    { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
+    { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
+    { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {(1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
+    { "rtsp_flags", "RTSP flags", OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" },
+    { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" },
     { NULL },
 };
 
@@ -1317,8 +1325,19 @@ int ff_rtsp_connect(AVFormatContext *s)
 
     if (!ff_network_init())
         return AVERROR(EIO);
-redirect:
+
     rt->control_transport = RTSP_MODE_PLAIN;
+    if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
+        rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
+        rt->control_transport = RTSP_MODE_TUNNEL;
+    }
+    /* Only pass through valid flags from here */
+    rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
+    if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
+        rt->filter_source = 1;
+
+redirect:
+    lower_transport_mask = rt->lower_transport_mask;
     /* extract hostname and port */
     av_url_split(NULL, 0, auth, sizeof(auth),
                  host, sizeof(host), &port, path, sizeof(path), s->filename);
@@ -1328,6 +1347,7 @@ redirect:
     if (port < 0)
         port = RTSP_DEFAULT_PORT;
 
+#if FF_API_RTSP_URL_OPTIONS
     /* search for options */
     option_list = strrchr(path, '?');
     if (option_list) {
@@ -1335,6 +1355,7 @@ redirect:
          * the options back into the same string. */
         filename = option_list;
         while (option_list) {
+            int handled = 1;
             /* move the option pointer */
             option = ++option_list;
             option_list = strchr(option_list, '&');
@@ -1360,10 +1381,16 @@ redirect:
                 memmove(++filename, option, len);
                 filename += len;
                 if (option_list) *filename = '&';
+                handled = 0;
             }
+            if (handled)
+                av_log(s, AV_LOG_WARNING, "Options passed via URL are "
+                                          "deprecated, use -rtsp_transport "
+                                          "and -rtsp_flags instead.\n");
         }
         *filename = 0;
     }
+#endif
 
     if (!lower_transport_mask)
         lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;

libavformat/rtsp.h

@@ -38,7 +38,10 @@ enum RTSPLowerTransport {
     RTSP_LOWER_TRANSPORT_UDP = 0,           /**< UDP/unicast */
     RTSP_LOWER_TRANSPORT_TCP = 1,           /**< TCP; interleaved in RTSP */
     RTSP_LOWER_TRANSPORT_UDP_MULTICAST = 2, /**< UDP/multicast */
-    RTSP_LOWER_TRANSPORT_NB
+    RTSP_LOWER_TRANSPORT_NB,
+    RTSP_LOWER_TRANSPORT_HTTP = 8,          /**< HTTP tunneled - not a proper
+                                                 transport mode as such,
+                                                 only for use via AVOptions */
 };
 
 /**
@@ -350,8 +353,17 @@ typedef struct RTSPState {
 
     /** Whether the server accepts the x-Dynamic-Rate header */
     int accept_dynamic_rate;
+
+    /**
+     * Various option flags for the RTSP muxer/demuxer.
+     */
+    int rtsp_flags;
 } RTSPState;
 
+#define RTSP_FLAG_FILTER_SRC  0x1    /**< Filter incoming UDP packets -
+                                          receive packets only from the right
+                                          source address and port. */
+
 /**
  * Describes a single stream, as identified by a single m= line block in the
  * SDP content. In the case of RDT, one RTSPStream can represent multiple

libavformat/version.h

@@ -25,7 +25,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 53
 #define LIBAVFORMAT_VERSION_MINOR  9
-#define LIBAVFORMAT_VERSION_MICRO  0
+#define LIBAVFORMAT_VERSION_MICRO  1
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \
@@ -92,5 +92,8 @@
 #ifndef FF_API_MUXRATE
 #define FF_API_MUXRATE                 (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
+#ifndef FF_API_RTSP_URL_OPTIONS
+#define FF_API_RTSP_URL_OPTIONS        (LIBAVFORMAT_VERSION_MAJOR < 54)
+#endif
 
 #endif /* AVFORMAT_VERSION_H */