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-rw-r--r--src/inputPlugins/_ogg_common.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/inputPlugins/_ogg_common.c b/src/inputPlugins/_ogg_common.c
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+/* the Music Player Daemon (MPD)
+ * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
+ * 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 "../inputPlugin.h"
+
+#if defined(HAVE_OGGFLAC) || defined(HAVE_OGGVORBIS)
+
+#include "../utils.h"
+#include "_ogg_common.h"
+
+#include <string.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, to_read = 41;
+
+ seekInputStream(inStream, 0, SEEK_SET);
+
+ while (to_read) {
+ r = readFromInputStream(inStream, buf, 1, to_read);
+ if (r < 0)
+ break;
+ to_read -= r;
+ if (!r && !inputStreamAtEOF(inStream))
+ my_usleep(10000);
+ else
+ break;
+ }
+
+ 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;
+}
+
+#endif /* defined(HAVE_OGGFLAC || defined(HAVE_OGGVORBIS) */
+