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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MPD_INPUT_STREAM_H
#define MPD_INPUT_STREAM_H
#include <stddef.h>
#include <stdbool.h>
#include <sys/types.h>
struct input_stream;
struct input_plugin {
bool (*open)(struct input_stream *is, const char *url);
void (*close)(struct input_stream *is);
struct tag *(*tag)(struct input_stream *is);
int (*buffer)(struct input_stream *is);
size_t (*read)(struct input_stream *is, void *ptr, size_t size);
bool (*eof)(struct input_stream *is);
bool (*seek)(struct input_stream *is, off_t offset, int whence);
};
struct input_stream {
const struct input_plugin *plugin;
bool seekable;
bool ready;
int error;
off_t size, offset;
char *mime;
void *data;
void *archive;
};
void input_stream_global_init(void);
void input_stream_global_finish(void);
/* if an error occurs for these 3 functions, then -1 is returned and errno
for the input stream is set */
bool
input_stream_open(struct input_stream *is, const char *url);
bool
input_stream_seek(struct input_stream *is, off_t offset, int whence);
void input_stream_close(struct input_stream *is);
bool input_stream_eof(struct input_stream *is);
/**
* Reads the tag from the stream.
*
* @return a tag object which must be freed with tag_free(), or NULL
* if the tag has not changed since the last call
*/
struct tag *
input_stream_tag(struct input_stream *is);
/* return value: -1 is error, 1 inidicates stuff was buffered, 0 means nothing
was buffered */
int input_stream_buffer(struct input_stream *is);
size_t
input_stream_read(struct input_stream *is, void *ptr, size_t size);
#endif
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