input/curl: move code to IcyInputStream

src/input/IcyInputStream.hxx

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2003-2014 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_INPUT_STREAM_HXX
+#define MPD_ICY_INPUT_STREAM_HXX
+
+#include "ProxyInputStream.hxx"
+#include "IcyMetaDataParser.hxx"
+
+struct Tag;
+
+/**
+ * An #InputStream filter that parses Icy metadata.
+ */
+class IcyInputStream final : public ProxyInputStream {
+	IcyMetaDataParser parser;
+
+	/**
+	 * The #Tag object ready to be requested via ReadTag().
+	 */
+	Tag *input_tag;
+
+	/**
+	 * The #Tag object ready to be requested via ReadTag().
+	 */
+	Tag *icy_tag;
+
+	offset_type override_offset;
+
+public:
+	IcyInputStream(InputStream *_input);
+	virtual ~IcyInputStream();
+
+	IcyInputStream(const IcyInputStream &) = delete;
+	IcyInputStream &operator=(const IcyInputStream &) = delete;
+
+	void Enable(size_t _data_size) {
+		parser.Start(_data_size);
+	}
+
+	bool IsEnabled() const {
+		return parser.IsDefined();
+	}
+
+	/* virtual methods from InputStream */
+	void Update() override;
+	Tag *ReadTag() override;
+	size_t Read(void *ptr, size_t size, Error &error) override;
+};
+
+#endif