1 /*
2  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <stdlib.h>
18 #include <syslog.h>
19 
20 #include "log.h"
21 #include "xmalloc.h"
22 #include "playlist.h"
23 
24 #define MAX(a, b) ((a) > (b) ? (a) : (b))
25 
26 struct playlist	playlist;
27 enum play_state	play_state;
28 int		repeat_one;
29 int		repeat_all = 1;
30 ssize_t		play_off = -1;
31 
32 void
33 playlist_enqueue(const char *path)
34 {
35 	size_t newcap;
36 
37 	if (playlist.len == playlist.cap) {
38 		newcap = MAX(16, playlist.cap * 1.5);
39 		playlist.songs = xrecallocarray(playlist.songs, playlist.cap,
40 		    newcap, sizeof(*playlist.songs));
41 		playlist.cap = newcap;
42 	}
43 
44 	playlist.songs[playlist.len++] = xstrdup(path);
45 }
46 
47 const char *
48 playlist_current(void)
49 {
50 	if (playlist.len == 0 || play_off == -1)
51 		return NULL;
52 
53 	return playlist.songs[play_off];
54 }
55 
56 const char *
57 playlist_advance(void)
58 {
59 	if (playlist.len == 0 || play_off+1 == playlist.len)
60 		return NULL;
61 
62 	play_off++;
63 	if (play_off == playlist.len) {
64 		if (repeat_all)
65 			play_off = 0;
66 		else {
67 			play_state = STATE_STOPPED;
68 			play_off = -1;
69 			return NULL;
70 		}
71 	}
72 
73 	play_state = STATE_PLAYING;
74 	return playlist.songs[play_off];
75 }
76 
77 void
78 playlist_reset(void)
79 {
80 	play_off = -1;
81 }
82 
83 void
84 playlist_truncate(void)
85 {
86 	size_t i;
87 
88 	for (i = 0; i < playlist.len; ++i)
89 		free(playlist.songs[i]);
90 	free(playlist.songs);
91 	playlist.songs = NULL;
92 
93 	playlist.len = 0;
94 	playlist.cap = 0;
95 	play_off = -1;
96 }