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Diffstat (limited to '')
-rw-r--r-- | src/decoder/OggCodec.cxx | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/decoder/OggCodec.cxx b/src/decoder/OggCodec.cxx new file mode 100644 index 000000000..5ad9c69d6 --- /dev/null +++ b/src/decoder/OggCodec.cxx @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2003-2013 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 "OggCodec.hxx" + +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_UNKNOWN; + + 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; + + if (memcmp(buf + 28, "Opus", 4) == 0) + return OGG_CODEC_OPUS; + + return OGG_CODEC_VORBIS; +} |