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/*
* Copyright 2003-2019 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 "util/Compiler.h"
#include <memory>
struct Tag;
class IcyMetaDataParser;
/**
* An #InputStream filter that parses Icy metadata.
*/
class IcyInputStream final : public ProxyInputStream {
std::shared_ptr<IcyMetaDataParser> parser;
/**
* The #Tag object ready to be requested via ReadTag().
*/
std::unique_ptr<Tag> input_tag;
/**
* The #Tag object ready to be requested via ReadTag().
*/
std::unique_ptr<Tag> icy_tag;
offset_type override_offset = 0;
public:
/**
* @param _parser a IcyMetaDataParser instance which is shared
* with our input; it needs to be shared because our input
* needs to feed parameters (e.g. from the "icy-metaint"
* header) into it
*
* Throws on error (e.g. if the charset converter specified by
* the URI fragment fails to initialize).
*/
IcyInputStream(InputStreamPtr _input,
std::shared_ptr<IcyMetaDataParser> _parser);
virtual ~IcyInputStream() noexcept;
IcyInputStream(const IcyInputStream &) = delete;
IcyInputStream &operator=(const IcyInputStream &) = delete;
gcc_pure
bool IsEnabled() const noexcept;
/* virtual methods from InputStream */
void Update() noexcept override;
std::unique_ptr<Tag> ReadTag() noexcept override;
size_t Read(std::unique_lock<Mutex> &lock,
void *ptr, size_t size) override;
};
#endif
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