Add audio to the pipeline even if the stream source it's already in use for video

FIXME: Whith this commit it's possible to add more streams for the same source if the pipeline has an audio source for that source.

gst-plugin-ndi/src/lib.rs

@@ -36,6 +36,8 @@ use gst_plugin::base_src::*;
 use std::collections::HashMap;
 use std::sync::Mutex;
 
+use gst::GstObjectExt;
+
 // Plugin entry point that should register all elements provided by this plugin,
 // and everything else that this plugin might provide (e.g. typefinders or device providers).
 fn plugin_init(plugin: &gst::Plugin) -> bool {
@@ -64,12 +66,32 @@ lazy_static! {
 fn connect_ndi(cat: gst::DebugCategory , element: &BaseSrc,  ip: String,  stream_name: String) -> bool{
     unsafe {
         gst_debug!(cat, obj: element, "Starting NDI connection...");
-
         let mut map = hashmap_receivers.lock().unwrap();
+
+        //FIXME It's possible to connect more than one source if an audiosrc is active
+        let mut audio = false;
+        if (element.get_name().contains("ndiaudiosrc")){
+            audio = true;
+        }
+
         if (map.contains_key(&stream_name) || map.contains_key(&ip)){
+            if (map.contains_key(&stream_name)){
+                let recv = map.get(&stream_name).unwrap();
+                audio = recv.audio;
+            }
+            else if (map.contains_key(&ip)){
+                let recv = map.get(&ip).unwrap();
+                audio = recv.audio;
+            }
+            if (audio){
+                println!("We already have an source, but we need to add an audio source to the pipeline. So we need to reutilize the source...");
+                return true;
+            }
+            else{
                 println!("Already connected to {}{}", ip, stream_name);
                 return false;
             }
+         }
 
         if !NDIlib_initialize() {
             gst_element_error!(element, gst::CoreError::Negotiation, ["Cannot run NDI: NDIlib_initialize error"]);
@@ -163,8 +185,8 @@ fn connect_ndi(cat: gst::DebugCategory , element: &BaseSrc,  ip: String,  stream
 
         NDIlib_recv_send_metadata(pNDI_recv, &enable_hw_accel);
 
-        map.insert(source_name.clone(), NdiInstance{recv: pNDI_recv});
-        map.insert(source_ip.clone(), NdiInstance{recv: pNDI_recv});
+        map.insert(source_name.clone(), NdiInstance{recv: pNDI_recv, audio: audio});
+        map.insert(source_ip.clone(), NdiInstance{recv: pNDI_recv, audio: audio});
 
         // let start = SystemTime::now();
         // let since_the_epoch = start.duration_since(UNIX_EPOCH)

gst-plugin-ndi/src/ndilib.rs

@@ -152,6 +152,7 @@ pub type NDIlib_recv_instance_t = *mut ::std::os::raw::c_void;
 //Rust wrapper around *mut ::std::os::raw::c_void
 pub struct NdiInstance {
     pub recv: NDIlib_recv_instance_t,
+    pub audio: bool,
 }
 
 unsafe impl ::std::marker::Send for NdiInstance {}