Flac refactor WIP

Signed-off-by: Mahyar Koshkouei <deltabeard@users.noreply.github.com>

source/playback.h

@@ -1 +1,18 @@
+enum file_types {
+	FILE_TYPE_ERROR = -1,
+	FILE_TYPE_WAV,
+	FILE_TYPE_FLAC,
+	FILE_TYPE_OGG,
+	FILE_TYPE_OPUS,
+	FILE_TYPE_MP3
+};
+
 int playFile(const char* file);
+
+/**
+ * Obtains file type.
+ *
+ * \param	file	File location.
+ * \return			File type, else negative.
+ */
+int getFileType(const char *file);