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/*
* Copyright (C) 2003-2011 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_SONG_H
#define MPD_SONG_H
#include "util/list.h"
#include "gcc.h"
#include <assert.h>
#include <stddef.h>
#include <stdbool.h>
#include <sys/time.h>
#define SONG_FILE "file: "
#define SONG_TIME "Time: "
struct song {
/**
* Pointers to the siblings of this directory within the
* parent directory. It is unused (undefined) if this song is
* not in the database.
*
* This attribute is protected with the global #db_mutex.
* Read access in the update thread does not need protection.
*/
struct list_head siblings;
struct tag *tag;
struct Directory *parent;
time_t mtime;
/**
* Start of this sub-song within the file in milliseconds.
*/
unsigned start_ms;
/**
* End of this sub-song within the file in milliseconds.
* Unused if zero.
*/
unsigned end_ms;
char uri[sizeof(int)];
};
/**
* A dummy #directory instance that is used for "detached" song
* copies.
*/
extern struct Directory detached_root;
#ifdef __cplusplus
extern "C" {
#endif
/** allocate a new song with a remote URL */
struct song *
song_remote_new(const char *uri);
/** allocate a new song with a local file name */
struct song *
song_file_new(const char *path, struct Directory *parent);
/**
* allocate a new song structure with a local file name and attempt to
* load its metadata. If all decoder plugin fail to read its meta
* data, NULL is returned.
*/
struct song *
song_file_load(const char *path, struct Directory *parent);
/**
* Replaces the URI of a song object. The given song object is
* destroyed, and a newly allocated one is returned. It does not
* update the reference within the parent directory; the caller is
* responsible for doing that.
*/
struct song *
song_replace_uri(struct song *song, const char *uri);
/**
* Creates a "detached" song object.
*/
struct song *
song_detached_new(const char *uri);
/**
* Creates a duplicate of the song object. If the object is in the
* database, it creates a "detached" copy of this song, see
* song_is_detached().
*/
gcc_malloc
struct song *
song_dup_detached(const struct song *src);
void
song_free(struct song *song);
static inline bool
song_in_database(const struct song *song)
{
return song->parent != NULL;
}
static inline bool
song_is_file(const struct song *song)
{
return song_in_database(song) || song->uri[0] == '/';
}
static inline bool
song_is_detached(const struct song *song)
{
assert(song != NULL);
assert(song_in_database(song));
return song->parent == &detached_root;
}
/**
* Returns true if both objects refer to the same physical song.
*/
gcc_pure
bool
song_equals(const struct song *a, const struct song *b);
bool
song_file_update(struct song *song);
bool
song_file_update_inarchive(struct song *song);
/**
* Returns the URI of the song in UTF-8 encoding, including its
* location within the music directory.
*
* The return value is allocated on the heap, and must be freed by the
* caller.
*/
char *
song_get_uri(const struct song *song);
double
song_get_duration(const struct song *song);
#ifdef __cplusplus
}
#endif
#endif
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