/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Common functions used for Ogg data streams (Ogg-Vorbis and OggFLAC)
*/
#include "config.h"
#include "_ogg_common.h"
ogg_stream_type ogg_stream_type_detect(struct input_stream *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;
r = decoder_read(NULL, inStream, buf, sizeof(buf));
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;
}
