diff options
Diffstat (limited to 'src/decoder/OpusTags.cxx')
-rw-r--r-- | src/decoder/OpusTags.cxx | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/decoder/OpusTags.cxx b/src/decoder/OpusTags.cxx new file mode 100644 index 00000000..cb35a624 --- /dev/null +++ b/src/decoder/OpusTags.cxx @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2003-2012 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. + */ + +#include "config.h" +#include "OpusTags.hxx" +#include "OpusReader.hxx" +#include "XiphTags.h" +#include "tag_handler.h" + +#include <stdint.h> +#include <string.h> +#include <stdlib.h> + +static void +ScanOneOpusTag(const char *name, const char *value, + const struct tag_handler *handler, void *ctx) +{ + tag_handler_invoke_pair(handler, ctx, name, value); + + if (handler->tag != nullptr) { + enum tag_type t = tag_table_lookup_i(xiph_tags, name); + if (t != TAG_NUM_OF_ITEM_TYPES) + tag_handler_invoke_tag(handler, ctx, t, value); + } +} + +bool +ScanOpusTags(const void *data, size_t size, + const struct tag_handler *handler, void *ctx) +{ + OpusReader r(data, size); + if (!r.Expect("OpusTags", 8)) + return false; + + if (handler->pair == nullptr && handler->tag == nullptr) + return true; + + if (!r.SkipString()) + return false; + + uint32_t n; + if (!r.ReadWord(n)) + return false; + + while (n-- > 0) { + char *p = r.ReadString(); + if (p == nullptr) + return false; + + char *eq = strchr(p, '='); + if (eq != nullptr && eq > p) { + *eq = 0; + + ScanOneOpusTag(p, eq + 1, handler, ctx); + } + + free(p); + } + + return true; +} |