77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_ICY_INPUT_STREAM_HXX
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#define MPD_ICY_INPUT_STREAM_HXX
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#include "ProxyInputStream.hxx"
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#include "util/Compiler.h"
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#include <memory>
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struct Tag;
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class IcyMetaDataParser;
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/**
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* An #InputStream filter that parses Icy metadata.
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*/
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class IcyInputStream final : public ProxyInputStream {
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std::shared_ptr<IcyMetaDataParser> parser;
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/**
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* The #Tag object ready to be requested via ReadTag().
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*/
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std::unique_ptr<Tag> input_tag;
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/**
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* The #Tag object ready to be requested via ReadTag().
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*/
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std::unique_ptr<Tag> icy_tag;
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offset_type override_offset = 0;
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public:
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/**
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* @param _parser a IcyMetaDataParser instance which is shared
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* with our input; it needs to be shared because our input
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* needs to feed parameters (e.g. from the "icy-metaint"
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* header) into it
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*
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* Throws on error (e.g. if the charset converter specified by
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* the URI fragment fails to initialize).
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*/
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IcyInputStream(InputStreamPtr _input,
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std::shared_ptr<IcyMetaDataParser> _parser);
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virtual ~IcyInputStream() noexcept;
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IcyInputStream(const IcyInputStream &) = delete;
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IcyInputStream &operator=(const IcyInputStream &) = delete;
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gcc_pure
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bool IsEnabled() const noexcept;
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/* virtual methods from InputStream */
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void Update() noexcept override;
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std::unique_ptr<Tag> ReadTag() noexcept override;
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size_t Read(std::unique_lock<Mutex> &lock,
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void *ptr, size_t size) override;
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};
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#endif
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