92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
/*
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* Copyright (C) 2003-2013 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_INPUT_PLUGIN_HXX
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#define MPD_INPUT_PLUGIN_HXX
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#include "thread/Mutex.hxx"
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#include "thread/Cond.hxx"
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#include <stddef.h>
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#include <stdint.h>
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struct config_param;
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struct InputStream;
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class Error;
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struct Tag;
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struct InputPlugin {
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typedef int64_t offset_type;
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const char *name;
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/**
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* Global initialization. This method is called when MPD starts.
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*
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* @return true on success, false if the plugin should be
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* disabled
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*/
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bool (*init)(const config_param ¶m, Error &error);
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/**
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* Global deinitialization. Called once before MPD shuts
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* down (only if init() has returned true).
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*/
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void (*finish)(void);
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InputStream *(*open)(const char *uri,
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Mutex &mutex, Cond &cond,
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Error &error);
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void (*close)(InputStream *is);
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/**
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* Check for errors that may have occurred in the I/O thread.
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* May be unimplemented for synchronous plugins.
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*
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* @return false on error
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*/
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bool (*check)(InputStream *is, Error &error);
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/**
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* Update the public attributes. Call before access. Can be
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* nullptr if the plugin always keeps its attributes up to date.
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*/
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void (*update)(InputStream *is);
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Tag *(*tag)(InputStream *is);
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/**
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* Returns true if the next read operation will not block:
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* either data is available, or end-of-stream has been
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* reached, or an error has occurred.
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*
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* If this method is unimplemented, then it is assumed that
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* reading will never block.
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*/
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bool (*available)(InputStream *is);
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size_t (*read)(InputStream *is, void *ptr, size_t size,
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Error &error);
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bool (*eof)(InputStream *is);
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bool (*seek)(InputStream *is, offset_type offset, int whence,
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Error &error);
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};
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#endif
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