ICYStreamBuffered: change from using to class

Author: pschatzmann

src/AudioTools/Communication/HTTP/ICYStream.h

@@ -1,10 +1,9 @@
 #pragma once
-#include "AudioTools/Communication/HTTP/URLStream.h"
 #include "AudioTools/Communication/HTTP/ICYStreamT.h"
+#include "AudioTools/Communication/HTTP/URLStream.h"
 
 namespace audio_tools {
 
-
 /**
  * @brief Type alias for ICYStreamT<URLStream>.
  * @ingroup http
@@ -13,11 +12,21 @@ using ICYStream = ICYStreamT<URLStream>;
 
 #if defined(USE_CONCURRENCY)
 /**
- * @brief Type alias for URLStreamBufferedT<ICYStream> (buffered ICYStream).
+ * @brief Buffered ICYStream with metadata callback support.
  * @ingroup http
  */
-using ICYStreamBuffered = URLStreamBufferedT<ICYStream>;
+class ICYStreamBuffered : public URLStreamBufferedT<ICYStream> {
+ public:
+  using URLStreamBufferedT<ICYStream>::URLStreamBufferedT;
 
+  /// Defines the metadata callback function
+  virtual bool setMetadataCallback(void (*fn)(MetaDataType info,
+                                              const char* str,
+                                              int len)) override {
+    this->urlStream.setMetadataCallback(fn);
+    return true;
+  }
+};
 #endif
 
-}
+}  // namespace audio_tools