1 files changed, 49 insertions, 0 deletions
diff --git a/src/decoder/_ogg_common.c b/src/decoder/_ogg_common.c
new file mode 100644
index 000000000..841b2ad3f
--- /dev/null
+++ b/src/decoder/_ogg_common.c
@@ -0,0 +1,49 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: http://www.musicpd.org
+ *
+ * Common functions used for Ogg data streams (Ogg-Vorbis and OggFLAC)
+ * (c) 2005 by Eric Wong <normalperson@yhbt.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "_ogg_common.h"
+#include "_flac_common.h"
+#include "../utils.h"
+
+ogg_stream_type ogg_stream_type_detect(InputStream * inStream)
+{
+	/* oggflac detection based on code in ogg123 and this post
+	 * http://lists.xiph.org/pipermail/flac/2004-December/000393.html
+	 * ogg123 trunk still doesn't have this patch as of June 2005 */
+	unsigned char buf[41];
+	size_t r;
+
+	seekInputStream(inStream, 0, SEEK_SET);
+
+	r = decoder_read(NULL, inStream, buf, sizeof(buf));
+
+	if (r > 0)
+		seekInputStream(inStream, 0, SEEK_SET);
+
+	if (r >= 32 && memcmp(buf, "OggS", 4) == 0 && (
+				(memcmp(buf+29, "FLAC", 4) == 0
+					&& memcmp(buf+37, "fLaC", 4) == 0)
+				|| (memcmp(buf+28, "FLAC", 4) == 0)
+				|| (memcmp(buf+28, "fLaC", 4) == 0))) {
+		return FLAC;
+	}
+	return VORBIS;
+}