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/*
* Copyright (C) 2003-2013 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_HXX
#define MPD_SONG_HXX
#include "util/list.h"
#include "Compiler.h"
#include <string>
#include <assert.h>
#include <sys/time.h>
#define SONG_FILE "file: "
#define SONG_TIME "Time: "
struct Tag;
/**
* A dummy #directory instance that is used for "detached" song
* copies.
*/
extern struct Directory detached_root;
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;
Tag *tag;
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)];
/** allocate a new song with a remote URL */
gcc_malloc
static Song *NewRemote(const char *uri);
/** allocate a new song with a local file name */
gcc_malloc
static Song *NewFile(const char *path_utf8, 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, nullptr is returned.
*/
gcc_malloc
static Song *LoadFile(const char *path_utf8, Directory *parent);
static Song *LoadFile(const char *path_utf8, Directory &parent) {
return LoadFile(path_utf8, &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.
*/
gcc_malloc
Song *ReplaceURI(const char *uri);
/**
* Creates a "detached" song object.
*/
gcc_malloc
static Song *NewDetached(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::IsDetached().
*/
gcc_malloc
Song *DupDetached() const;
void Free();
bool IsInDatabase() const {
return parent != nullptr;
}
bool IsFile() const {
return IsInDatabase() || uri[0] == '/';
}
bool IsDetached() const {
assert(IsInDatabase());
return parent == &detached_root;
}
bool UpdateFile();
bool UpdateFileInArchive();
/**
* Returns the URI of the song in UTF-8 encoding, including its
* location within the music directory.
*/
gcc_pure
std::string GetURI() const;
gcc_pure
double GetDuration() const;
};
/**
* Returns true if both objects refer to the same physical song.
*/
gcc_pure
bool
song_equals(const Song *a, const Song *b);
#endif
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