rtspsrc2: Update rtpbin2 support to use rtprecv and rtpsend

USE_RTPBIN2 is now USE_RTP2 because there is no "rtpbin2" now.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1426>

docs/plugins/gst_plugins_cache.json

@@ -8733,6 +8733,21 @@
                 ],
                 "kind": "object"
             },
+            "GstRtpSendProfile": {
+                "kind": "enum",
+                "values": [
+                    {
+                        "desc": "AVP profile as specified in RFC 3550",
+                        "name": "avp",
+                        "value": "0"
+                    },
+                    {
+                        "desc": "AVPF profile as specified in RFC 4585",
+                        "name": "avpf",
+                        "value": "1"
+                    }
+                ]
+            },
             "GstRtpVp8Pay2FragmentationMode": {
                 "kind": "enum",
                 "values": [

net/rtsp/src/rtspsrc/imp.rs

@@ -816,12 +816,12 @@ impl RtspSrc {
                 )
                 .await?
         };
-        let manager = RtspManager::new(std::env::var("USE_RTPBIN2").is_ok_and(|s| s == "1"));
+        let manager = RtspManager::new(std::env::var("USE_RTP2").is_ok_and(|s| s == "1"));
 
         let obj = self.obj();
-        obj.add(&manager.inner)
+        manager
+            .add_to(obj.upcast_ref::<gst::Bin>())
             .expect("Adding the manager cannot fail");
-        manager.inner.sync_state_with_parent().unwrap();
 
         let mut tcp_interleave_appsrcs = HashMap::new();
         for (rtpsession_n, p) in state.setup_params.iter_mut().enumerate() {
@@ -983,7 +983,7 @@ impl RtspSrc {
         obj.no_more_pads();
 
         // Expose RTP srcpads
-        manager.inner.connect_pad_added(|manager, pad| {
+        manager.recv.connect_pad_added(|manager, pad| {
             if pad.direction() != gst::PadDirection::Src {
                 return;
             }
@@ -995,9 +995,9 @@ impl RtspSrc {
             };
             let name = pad.name();
             match *name.split('_').collect::<Vec<_>>() {
-                // rtpbin and rtpbin2
+                // rtpbin and rtp2
                 ["recv", "rtp", "src", stream_id, ssrc, pt]
-                | ["rtp", "recv", "src", stream_id, ssrc, pt] => {
+                | ["rtp", "src", stream_id, ssrc, pt] => {
                     if stream_id.parse::<u32>().is_err() {
                         gst::info!(CAT, "Ignoring srcpad with invalid stream id: {name}");
                         return;
@@ -1128,16 +1128,27 @@ impl RtspSrc {
 }
 
 struct RtspManager {
-    inner: gst::Element,
-    using_rtpbin2: bool,
+    recv: gst::Element,
+    send: gst::Element,
+    using_rtp2: bool,
 }
 
 impl RtspManager {
-    fn new(rtpbin2: bool) -> Self {
-        let name = if rtpbin2 { "rtpbin2" } else { "rtpbin" };
-        let manager = gst::ElementFactory::make_with_name(name, None)
-            .unwrap_or_else(|_| panic!("{name} not found"));
-        if !rtpbin2 {
+    fn new(rtp2: bool) -> Self {
+        let (recv, send) = if rtp2 {
+            let recv = gst::ElementFactory::make_with_name("rtprecv", None)
+                .unwrap_or_else(|_| panic!("rtprecv not found"));
+            let send = gst::ElementFactory::make("rtpsend")
+                .property("rtp-id", recv.property::<String>("rtp-id"))
+                .build()
+                .unwrap_or_else(|_| panic!("rtpsend not found"));
+            (recv, send)
+        } else {
+            let e = gst::ElementFactory::make_with_name("rtpbin", None)
+                .unwrap_or_else(|_| panic!("rtpbin not found"));
+            (e.clone(), e)
+        };
+        if !rtp2 {
             let on_bye = |args: &[glib::Value]| {
                 let m = args[0].get::<gst::Element>().unwrap();
                 let obj = m.parent()?;
@@ -1145,46 +1156,62 @@ impl RtspManager {
                 bin.send_event(gst::event::Eos::new());
                 None
             };
-            manager.connect("on-bye-ssrc", true, move |args| {
+            recv.connect("on-bye-ssrc", true, move |args| {
                 gst::info!(CAT, "Received BYE packet");
                 on_bye(args)
             });
-            manager.connect("on-bye-timeout", true, move |args| {
+            recv.connect("on-bye-timeout", true, move |args| {
                 gst::info!(CAT, "BYE due to timeout");
                 on_bye(args)
             });
         }
         RtspManager {
-            inner: manager,
-            using_rtpbin2: rtpbin2,
+            recv,
+            send,
+            using_rtp2: rtp2,
         }
     }
 
     fn rtp_recv_sinkpad(&self, rtpsession: usize) -> Option<gst::Pad> {
-        let name = if self.using_rtpbin2 {
-            format!("rtp_recv_sink_{}", rtpsession)
+        let name = if self.using_rtp2 {
+            format!("rtp_sink_{}", rtpsession)
         } else {
             format!("recv_rtp_sink_{}", rtpsession)
         };
-        self.inner.request_pad_simple(&name)
+        gst::info!(CAT, "requesting {name} for receiving RTP");
+        self.recv.request_pad_simple(&name)
     }
 
     fn rtcp_recv_sinkpad(&self, rtpsession: usize) -> Option<gst::Pad> {
-        let name = if self.using_rtpbin2 {
-            format!("rtcp_recv_sink_{}", rtpsession)
+        let name = if self.using_rtp2 {
+            format!("rtcp_sink_{}", rtpsession)
         } else {
             format!("recv_rtcp_sink_{}", rtpsession)
         };
-        self.inner.request_pad_simple(&name)
+        gst::info!(CAT, "requesting {name} for receiving RTCP");
+        self.recv.request_pad_simple(&name)
     }
 
     fn rtcp_send_srcpad(&self, rtpsession: usize) -> Option<gst::Pad> {
-        let name = if self.using_rtpbin2 {
-            format!("rtcp_send_src_{}", rtpsession)
+        let name = if self.using_rtp2 {
+            format!("rtcp_src_{}", rtpsession)
         } else {
             format!("send_rtcp_src_{}", rtpsession)
         };
-        self.inner.request_pad_simple(&name)
+        gst::info!(CAT, "requesting {name} for sending RTCP");
+        self.send.request_pad_simple(&name)
+    }
+
+    fn add_to<T: IsA<gst::Bin>>(&self, bin: &T) -> Result<(), glib::BoolError> {
+        if self.using_rtp2 {
+            bin.add_many([&self.recv, &self.send])?;
+            self.recv.sync_state_with_parent()?;
+            self.send.sync_state_with_parent()?;
+        } else {
+            bin.add_many([&self.recv])?;
+            self.recv.sync_state_with_parent()?;
+        }
+        Ok(())
     }
 }