Add support for flac in ogg container

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

source/flac.c

@@ -75,3 +75,21 @@ void exitFlac(void)
 {
 	drflac_close(pFlac);
 }
+
+/**
+ * Checks if the input file is Flac
+ *
+ * \param in	Input file.
+ * \return		0 if Flac file, else not or failure.
+ */
+int isFlac(const char* in)
+{
+	int err = -1;
+	drflac* pFlac = drflac_open_file(in);
+
+	if(pFlac != NULL)
+		err = 0;
+
+	drflac_close(pFlac);
+	return err;
+}

source/flac.h

@@ -41,3 +41,11 @@ uint64_t decodeFlac(void* buffer);
  * Free Flac decoder.
  */
 void exitFlac(void);
+
+/**
+ * Checks if the input file is Flac
+ *
+ * \param in	Input file.
+ * \return		0 if Flac file, else not or failure.
+ */
+int isFlac(const char* in);

source/playback.c

@@ -87,6 +87,8 @@ int getFileType(const char *file)
 		case 0x5367674F:
 			if(isOpus(file) == 0)
 				file_type = FILE_TYPE_OPUS;
+			else if(isFlac(file) == 0)
+				file_type = FILE_TYPE_FLAC;
 			else
 			{
 				//file_type = FILE_TYPE_OGG;