From ef2e3c774cab82a94a5e34399f2013d64c3cf03b Mon Sep 17 00:00:00 2001
From: Marvin W <git@larma.de>
Date: Sun, 21 Mar 2021 12:41:38 +0100
Subject: Add RTP implementation as plugin

---
 plugins/rtp/src/video_widget.vala | 110 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 plugins/rtp/src/video_widget.vala

(limited to 'plugins/rtp/src/video_widget.vala')

diff --git a/plugins/rtp/src/video_widget.vala b/plugins/rtp/src/video_widget.vala
new file mode 100644
index 00000000..fa5ba138
--- /dev/null
+++ b/plugins/rtp/src/video_widget.vala
@@ -0,0 +1,110 @@
+public class Dino.Plugins.Rtp.VideoWidget : Gtk.Bin, Dino.Plugins.VideoCallWidget {
+    private static uint last_id = 0;
+
+    public uint id { get; private set; }
+    public Gst.Element element { get; private set; }
+    public Gtk.Widget widget { get; private set; }
+
+    public Plugin plugin { get; private set; }
+    public Gst.Pipeline pipe { get {
+        return plugin.pipe;
+    }}
+
+    private bool attached;
+    private Device? connected_device;
+    private Stream? connected_stream;
+    private Gst.Element convert;
+
+    public VideoWidget(Plugin plugin) {
+        this.plugin = plugin;
+
+        id = last_id++;
+        element = Gst.ElementFactory.make("gtksink", @"video-widget-$id");
+        if (element != null) {
+            Gtk.Widget widget;
+            element.@get("widget", out widget);
+            element.@set("async", false);
+            element.@set("sync", false);
+            this.widget = widget;
+            add(widget);
+            widget.visible = true;
+
+            // Listen for resolution changes
+            element.get_static_pad("sink").notify["caps"].connect(() => {
+                if (element.get_static_pad("sink").caps == null) return;
+
+                int width, height;
+                element.get_static_pad("sink").caps.get_structure(0).get_int("width", out width);
+                element.get_static_pad("sink").caps.get_structure(0).get_int("height", out height);
+                resolution_changed(width, height);
+            });
+        } else {
+            warning("Could not create GTK video sink. Won't display videos.");
+        }
+    }
+
+    public void display_stream(Xmpp.Xep.JingleRtp.Stream stream) {
+        if (element == null) return;
+        detach();
+        if (stream.media != "video") return;
+        connected_stream = stream as Stream;
+        if (connected_stream == null) return;
+        plugin.pause();
+        pipe.add(element);
+        convert = Gst.parse_bin_from_description(@"videoconvert name=video-widget-$id-convert", true);
+        convert.name = @"video-widget-$id-prepare";
+        pipe.add(convert);
+        convert.link(element);
+        connected_stream.add_output(convert);
+        element.set_locked_state(false);
+        plugin.unpause();
+        attached = true;
+    }
+
+    public void display_device(MediaDevice media_device) {
+        if (element == null) return;
+        detach();
+        connected_device = media_device as Device;
+        if (connected_device == null) return;
+        plugin.pause();
+        pipe.add(element);
+        convert = Gst.parse_bin_from_description(@"videoflip method=horizontal-flip name=video-widget-$id-flip ! videoconvert name=video-widget-$id-convert", true);
+        convert.name = @"video-widget-$id-prepare";
+        pipe.add(convert);
+        convert.link(element);
+        connected_device.link_source().link(convert);
+        element.set_locked_state(false);
+        plugin.unpause();
+        attached = true;
+    }
+
+    public void detach() {
+        if (element == null) return;
+        if (attached) {
+            if (connected_stream != null) {
+                connected_stream.remove_output(convert);
+                connected_stream = null;
+            }
+            if (connected_device != null) {
+                connected_device.link_source().unlink(element);
+                connected_device.unlink(); // We get a new ref to recover the element, so unlink twice
+                connected_device.unlink();
+                connected_device = null;
+            }
+            convert.set_locked_state(true);
+            convert.set_state(Gst.State.NULL);
+            pipe.remove(convert);
+            convert = null;
+            element.set_locked_state(true);
+            element.set_state(Gst.State.NULL);
+            pipe.remove(element);
+            attached = false;
+        }
+    }
+
+    public override void dispose() {
+        detach();
+        widget = null;
+        element = null;
+    }
+}
\ No newline at end of file
-- 
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