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/* 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 "../inputPlugin.h"
#include "_flac_common.h"
#include "_ogg_common.h"
#if defined(HAVE_OGGFLAC) || defined(HAVE_OGGVORBIS) || \
(defined(FLAC_API_VERSION_CURRENT) && FLAC_API_VERSION_CURRENT > 7)
#include "../utils.h"
#include "../os_compat.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);
while (1) {
r = readFromInputStream(inStream, buf, 1, sizeof(buf));
if (inStream->error)
break;
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) */
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