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