aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/sfx/sfx_songlib.h
blob: 4d88be623a185e8666d9c7403cced833c4aea96d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 * $URL$
 * $Id$
 *
 */

/* Song library */

#ifndef SCI_SFX_SFX_SONGLIB_H
#define SCI_SFX_SFX_SONGLIB_H

#include "common/scummsys.h"

#include "sci/sfx/sfx_iterator.h"

namespace Sci {

#define SOUND_STATUS_STOPPED   0
#define SOUND_STATUS_PLAYING   1
#define SOUND_STATUS_SUSPENDED 2
/* suspended: only if ordered from kernel space */
#define SOUND_STATUS_WAITING   3
/* "waiting" means "tagged for playing, but not active right now" */

typedef unsigned long song_handle_t;

enum RESTORE_BEHAVIOR {
	RESTORE_BEHAVIOR_CONTINUE, /* restart a song when restored from
				     a saved game */
	RESTORE_BEHAVIOR_RESTART /* continue it from where it was */
};

struct song_t {
	song_handle_t handle;
	int resource_num; /* Resource number */
	int priority; /* Song priority (more important if priority is higher) */
	int status;   /* See above */

	int restore_behavior;
	int restore_time;

	/* Grabbed from the sound iterator, for save/restore purposes */
	int loops;
	int hold;

	song_iterator_t *it;
	long delay; /* Delay before accessing the iterator, in microseconds */

	uint32 wakeup_time; /* Used by the sound core:
			      ** Playing -> time at which 'delay' has elapsed
			      ** Suspended/Waiting -> stopping time */

	song_t *next; /* Next song or NULL if this is the last one */
	song_t *next_playing; /* Next playing song; used by the
				    ** core song system */
	song_t *next_stopping; /* Next song pending stopping; used exclusively by
				     ** the core song system's _update_multi_song() */
};


struct songlib_t {
	song_t **lib;
	song_t *_s;
};

/**************************/
/* Song library commands: */
/**************************/

song_t *song_new(song_handle_t handle, song_iterator_t *it, int priority);
/* Initializes a new song
** Parameters: (song_handle_t) handle: The sound handle
**             (song_iterator_t *) it: The song
**             (int) priority: The song's priority
** Returns   : (song_t *) A freshly allocated song
** Other values are set to predefined defaults.
*/


void song_lib_init(songlib_t *songlib);
/* Initializes a static song library
** Parameters: (songlib_t *) songlib: Pointer to the library
**             to initialize
** Returns   : (void)
*/

void song_lib_free(songlib_t songlib);
/* Frees a song library
** Parameters: (songlib_t) songlib: The library to free
** Returns   : (void)
*/

void song_lib_add(songlib_t songlib, song_t *song);
/* Adds a song to a song library.
** Parameters: (songlib_t) songlib: An existing sound library, or NULL
**             (song_t *) song: The song to add
** Returns   : (void)
*/

song_t *song_lib_find(songlib_t songlib, song_handle_t handle);
/* Looks up the song with the specified handle
** Parameters: (songlib_t) songlib: An existing sound library, may point to NULL
**             (song_handle_t) handle: The sound handle to look for
** Returns   : (song_t *) The song or NULL if it wasn't found
*/

song_t *song_lib_find_active(songlib_t songlib);
/* Finds the first song playing with the highest priority
** Parameters: (songlib_t) songlib: An existing sound library
** Returns   : (song_t *) The song that should be played next, or NULL if there is none
*/

song_t *song_lib_find_next_active(songlib_t songlib, song_t *song);
/* Finds the next song playing with the highest priority
** Parameters: (songlib_t) songlib: The song library to operate on
**             (song_t *) song: A song previously returned from the song library
** Returns   : (song_t *) The next song to play relative to 'song', or
**                        NULL if none are left
** The functions 'song_lib_find_active' and 'song_lib_find_next_active
** allow to iterate over all songs that satisfy the requirement of
** being 'playable'.
*/

int song_lib_remove(songlib_t songlib, song_handle_t handle);
/* Removes a song from the library
** Parameters: (songlib_t) songlib: An existing sound library
**             (song_handle_t) handle: Handle of the song to remove
** Returns   : (int) The status of the song that was removed
*/

void song_lib_resort(songlib_t songlib, song_t *song);
/* Removes a song from the library and sorts it in again; for use after renicing
** Parameters: (songlib_t) songlib: An existing sound library
**             (song_t *) song: The song to work on
** Returns   : (void)
*/

int song_lib_count(songlib_t songlib);
/* Counts the number of songs in a song library
** Parameters: (songlib_t) songlib: The library to count
** Returns   : (int) The number of songs
*/

void song_lib_set_restore_behavior(songlib_t songlib, song_handle_t handle,
	RESTORE_BEHAVIOR action);
/* Determines what should be done with the song "handle" when
** restoring it from a saved game.
** Parameters: (songlib_t) songlib: The library that contains the song
**             (song_handle_t) handle: Its handle
**             (RESTORE_BEHAVIOR) action: The desired action
*/

} // End of namespace Sci

#endif // SCI_SSFX_SFX_SONGLIB_H