Handle non-existant call support

3 files changed, 20 insertions, 3 deletions

diff --git a/plugins/rtp/src/codec_util.vala b/plugins/rtp/src/codec_util.vala
index 7537c11d..6a2438f1 100644
--- a/plugins/rtp/src/codec_util.vala
+++ b/plugins/rtp/src/codec_util.vala
@@ -225,6 +225,7 @@ public class Dino.Plugins.Rtp.CodecUtil {
     }
 
     public string? get_encode_element_name(string media, string? codec) {
+        if (!is_element_supported(get_pay_element_name(media, codec))) return null;
         foreach (string candidate in get_encode_candidates(media, codec)) {
             if (is_element_supported(candidate)) return candidate;
         }
diff --git a/plugins/rtp/src/module.vala b/plugins/rtp/src/module.vala
index 52cc1880..13a21cd8 100644
--- a/plugins/rtp/src/module.vala
+++ b/plugins/rtp/src/module.vala
@@ -64,13 +64,13 @@ public class Dino.Plugins.Rtp.Module : JingleRtp.Module {
     }
 
     private async bool is_payload_supported(string media, JingleRtp.PayloadType payload_type) {
-        string codec = CodecUtil.get_codec_from_payload(media, payload_type);
+        string? codec = CodecUtil.get_codec_from_payload(media, payload_type);
         if (codec == null) return false;
         if (unsupported_codecs.contains(codec)) return false;
         if (supported_codecs.contains(codec)) return true;
 
-        string encode_element = codec_util.get_encode_element_name(media, codec);
-        string decode_element = codec_util.get_decode_element_name(media, codec);
+        string? encode_element = codec_util.get_encode_element_name(media, codec);
+        string? decode_element = codec_util.get_decode_element_name(media, codec);
         if (encode_element == null || decode_element == null) {
             debug("No suitable encoder or decoder found for %s", codec);
             unsupported_codecs.add(codec);
diff --git a/plugins/rtp/src/plugin.vala b/plugins/rtp/src/plugin.vala
index f0ad7db2..d43588b4 100644
--- a/plugins/rtp/src/plugin.vala
+++ b/plugins/rtp/src/plugin.vala
@@ -278,6 +278,22 @@ public class Dino.Plugins.Rtp.Plugin : RootInterface, VideoCallPlugin, Object {
         Gst.deinit();
     }
 
+    public bool supports(string media) {
+        if (rtpbin == null) return false;
+
+        if (media == "audio") {
+            if (get_devices("audio", false).is_empty) return false;
+            if (get_devices("audio", true).is_empty) return false;
+        }
+
+        if (media == "video") {
+            if (Gst.ElementFactory.make("gtksink", null) == null) return false;
+            if (get_devices("video", false).is_empty) return false;
+        }
+
+        return true;
+    }
+
     public VideoCallWidget? create_widget(WidgetType type) {
         if (type == WidgetType.GTK) {
             return new VideoWidget(this);