From ebf481e1a1d129f8ce9109ea97a77e5a55da128e Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Tue, 4 Sep 2012 13:05:12 +0200 Subject: decoder/ogg_common: rename to ogg_codec.c --- src/decoder/ogg_codec.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/decoder/ogg_codec.c (limited to 'src/decoder/ogg_codec.c') diff --git a/src/decoder/ogg_codec.c b/src/decoder/ogg_codec.c new file mode 100644 index 000000000..7d05db8e7 --- /dev/null +++ b/src/decoder/ogg_codec.c @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2003-2011 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_codec.h" + +enum ogg_codec +ogg_codec_detect(struct decoder *decoder, struct input_stream *is) +{ + /* 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 = decoder_read(decoder, is, buf, sizeof(buf)); + if (r < sizeof(buf) || memcmp(buf, "OggS", 4) != 0) + return OGG_CODEC_VORBIS; + + if ((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 OGG_CODEC_FLAC; + + return OGG_CODEC_VORBIS; +} -- cgit v1.2.3