/* the Music Player Daemon (MPD) * (c)2003-2006 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" #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) */