feat: add M4A/AAC support and update application version to dev43

include/m4a.h

@@ -0,0 +1,21 @@
+#ifndef M4A_H
+#define M4A_H
+
+#include "playback.h"
+
+/**
+ * Set decoder parameters for M4A/AAC.
+ *
+ * \param	decoder Structure to store parameters.
+ */
+void setM4a(struct decoder_fn* decoder);
+
+/**
+ * Check if a file is an M4A/AAC/ALAC file.
+ *
+ * \param	file	File location.
+ * \return			0 on success, -1 on failure.
+ */
+int isM4a(const char* file);
+
+#endif