From 63337c7df1ed5da13bd8850bc3fb18e8d9ab2ca2 Mon Sep 17 00:00:00 2001
From: Thibault Saunier <tsaunier@igalia.com>
Date: Fri, 19 Nov 2021 00:00:14 -0300
Subject: [PATCH] sink: Add a `new-webrtcbin` signal

Allowing user to add a data channel for example
---
 plugins/src/webrtcsink/imp.rs | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/plugins/src/webrtcsink/imp.rs b/plugins/src/webrtcsink/imp.rs
index 2b6b0d5e..8ba3e564 100644
--- a/plugins/src/webrtcsink/imp.rs
+++ b/plugins/src/webrtcsink/imp.rs
@@ -1396,7 +1396,7 @@ impl WebRTCSink {
 
         let mut consumer = Consumer {
             pipeline: pipeline.clone(),
-            webrtcbin,
+            webrtcbin: webrtcbin.clone(),
             webrtc_pads: HashMap::new(),
             peer_id: peer_id.to_string(),
             congestion_controller: match settings.cc_heuristic {
@@ -1455,6 +1455,10 @@ impl WebRTCSink {
             }
         });
 
+        pipeline.set_state(gst::State::Ready)?;
+
+        element.emit_by_name("new-webrtcbin", &[&peer_id.to_value(), &webrtcbin.to_value()])?;
+
         pipeline.set_state(gst::State::Playing)?;
 
         state.consumers.insert(peer_id.to_string(), consumer);
@@ -2024,6 +2028,29 @@ impl ObjectImpl for WebRTCSink {
         }
     }
 
+    fn signals() -> &'static [glib::subclass::Signal] {
+        static SIGNALS: Lazy<Vec<glib::subclass::Signal>> = Lazy::new(|| {
+            vec![
+                 /*
+                  * RsWebRTCSink::new-webrtcbin:
+                  * @peer_id: Identifier of the peer associated with the consumer added
+                  * @webrtcbin: The new webrtcbin
+                  *
+                  * This signal can be used to tweak @webrtcbin, creating a data
+                  * channel for example.
+                  */
+                glib::subclass::Signal::builder(
+                    "new-webrtcbin",
+                    &[String::static_type().into(), gst::Element::static_type().into()],
+                    glib::types::Type::UNIT.into(),
+                )
+                .build(),
+            ]
+        });
+
+        SIGNALS.as_ref()
+    }
+
     fn constructed(&self, obj: &Self::Type) {
         self.parent_constructed(obj);