Add new capabilities field to determine what optional features are included.

src/htsp_server.c

@@ -672,6 +672,7 @@ htsp_method_hello(htsp_connection_t *htsp, htsmsg_t *in)
   htsmsg_t *l, *r = htsmsg_create_map();
   uint32_t v;
   const char *name;
+  int i = 0;
 
   if(htsmsg_get_u32(in, "htspversion", &v))
     return htsp_error("Missing argument 'htspversion'");
@@ -691,6 +692,10 @@ htsp_method_hello(htsp_connection_t *htsp, htsmsg_t *in)
 
   /* Capabilities */
   l = htsmsg_create_list();
+  while (tvheadend_capabilities[i]) {
+    htsmsg_add_str(l, NULL, tvheadend_capabilities[i]);
+    i++;
+  }
   htsmsg_add_msg(r, "servercapability", l);
 
   /* Set version to lowest num */

src/main.c

@@ -78,6 +78,19 @@ int htsp_port;
 int htsp_port_extra;
 char *tvheadend_cwd;
 
+const char *tvheadend_capabilities[] = {
+#if ENABLE_CWC
+  "cwc",
+#endif
+#if ENABLE_V4L
+  "v4l",
+#endif
+#if ENABLE_LINUXDVB
+  "linuxdvb",
+#endif
+  NULL
+};
+
 static void
 handle_sigpipe(int x)
 {

src/tvheadend.h

@@ -36,6 +36,7 @@
 
 extern const char *tvheadend_version;
 extern char *tvheadend_cwd;
+extern const char *tvheadend_capabilities[];
 
 #define PTS_UNSET INT64_C(0x8000000000000000)