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+/*
+ * 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.
+ */
+
+#ifndef MPD_ICY_META_DATA_PARSER_HXX
+#define MPD_ICY_META_DATA_PARSER_HXX
+
+#include <stddef.h>
+
+class IcyMetaDataParser {
+ size_t data_size, data_rest;
+
+ size_t meta_size, meta_position;
+ char *meta_data;
+
+ struct tag *tag;
+
+public:
+ IcyMetaDataParser():data_size(0) {}
+ ~IcyMetaDataParser() {
+ Reset();
+ }
+
+ /**
+ * Initialize an enabled icy_metadata object with the specified
+ * data_size (from the icy-metaint HTTP response header).
+ */
+ void Start(size_t _data_size) {
+ data_size = data_rest = _data_size;
+ meta_size = 0;
+ tag = nullptr;
+ }
+
+ /**
+ * Resets the icy_metadata. Call this after rewinding the stream.
+ */
+ void Reset();
+
+ /**
+ * Checks whether the icy_metadata object is enabled.
+ */
+ bool IsDefined() const {
+ return data_size > 0;
+ }
+
+ /**
+ * Evaluates data. Returns the number of bytes of normal data which
+ * can be read by the caller, but not more than "length". If the
+ * return value is smaller than "length", the caller should invoke
+ * icy_meta().
+ */
+ size_t Data(size_t length);
+
+ /**
+ * Reads metadata from the stream. Returns the number of bytes
+ * consumed. If the return value is smaller than "length", the caller
+ * should invoke icy_data().
+ */
+ size_t Meta(const void *data, size_t length);
+
+ struct tag *ReadTag() {
+ struct tag *result = tag;
+ tag = nullptr;
+ return result;
+ }
+};
+
+#endif