amused.h

/*
 * Copyright (c) 2022, 2023 Omar Polo <op@omarpolo.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef AMUSED_H
#define AMUSED_H

extern char		*csock;
extern int		 debug;
extern int		 verbose;
extern int		 playing;
extern struct imsgev	*iev_player;

#define IMSG_DATA_SIZE(imsg)	((imsg).hdr.len - IMSG_HEADER_SIZE)

enum imsg_type {
	IMSG_PLAY,		/* fd + filename */
	IMSG_RESUME,
	IMSG_PAUSE,
	IMSG_STOP,
	IMSG_POS,
	IMSG_LEN,
	IMSG_EOF,
	IMSG_ERR,		/* error string */

	IMSG_CTL_PLAY,		/* with optional filename */
	IMSG_CTL_TOGGLE_PLAY,
	IMSG_CTL_PAUSE,
	IMSG_CTL_STOP,
	IMSG_CTL_FLUSH,
	IMSG_CTL_SHOW,
	IMSG_CTL_STATUS,
	IMSG_CTL_NEXT,
	IMSG_CTL_PREV,
	IMSG_CTL_JUMP,
	IMSG_CTL_MODE,		/* struct player_mode */
	IMSG_CTL_SEEK,		/* struct player_seek */
	IMSG_CTL_SHUFFLE,	/* int all */

	IMSG_CTL_BEGIN,
	IMSG_CTL_ADD,		/* path to a file */
	IMSG_CTL_COMMIT,	/* offset of the track to jump to */

	IMSG_CTL_MONITOR,	/* struct player_event */

	IMSG_CTL_ERR,
	IMSG__LAST,
};

struct imsgev {
	struct imsgbuf	 imsgbuf;
	void		(*handler)(int, int, void *);
	int		 events;
};

enum actions {
	NONE,
	PLAY,
	PAUSE,
	TOGGLE,
	STOP,
	RESTART,		/* seek to zero */
	ADD,
	FLUSH,
	SHOW,
	STATUS,
	PREV,
	NEXT,
	LOAD,
	JUMP,
	MODE,
	MONITOR,
	SEEK,
	SHUFFLE,
};

struct player_seek {
	int64_t	offset;
	int	relative;
	int	percent;
};

struct ctl_command;

#define MODE_ON		+1
#define MODE_OFF	 0
#define MODE_UNDEF	-1
#define MODE_TOGGLE	-2
struct player_mode {
	int	repeat_one;
	int	repeat_all;
	int	consume;
};

struct player_status {
	char			path[PATH_MAX];
	int			status;
	int64_t			position;
	int64_t			duration;
	struct player_mode	mode;
};

struct player_event {
	int			 event;
	int64_t			 position;
	int64_t			 duration;
	struct player_mode	 mode;
};

struct parse_result {
	enum actions		 action;
	char			**files;
	FILE			*fp;
	int			 all;
	int			 pretty;
	int			 monitor[IMSG__LAST];
	struct player_mode	 mode;
	struct player_seek	 seek;
	const char		*status_format;
	struct ctl_command	*ctl;
};

struct ctl_command {
	const char		*name;
	enum actions		 action;
	int			(*main)(struct parse_result *, int, char **);
	const char		*usage;
};

struct playlist;
struct pollfd;

/* amused.c */
void		spawn_daemon(void);
void		imsg_event_add(struct imsgev *iev);
int		imsg_compose_event(struct imsgev *, uint16_t, uint32_t,
		    pid_t, int, const void *, uint16_t);
int		main_send_player(uint16_t, int, const void *, size_t);
int		main_play_song(const char *);
void		main_playlist_jump(struct imsgev *, struct imsg *);
void		main_playlist_resume(void);
void		main_playlist_advance(void);
void		main_playlist_previous(void);
void		main_senderr(struct imsgev *, const char *);
void		main_enqueue(int, struct playlist *, struct imsgev *, struct imsg *);
void		main_send_playlist(struct imsgev *);
void		main_send_status(struct imsgev *);
void		main_seek(struct player_seek *);

/* ctl.c */
__dead void	usage(void);
__dead void	ctl(int, char **);

#endif