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 <sys/mman.h>
18 #include <sys/stat.h>
19 #include <sys/types.h>
20 #include <sys/queue.h>
21 #include <sys/uio.h>
22 
23 #include <err.h>
24 #include <event.h>
25 #include <limits.h>
26 #include <imsg.h>
27 #include <unistd.h>
28 
29 #include <mpg123.h>
30 
31 #include "amused.h"
32 #include "log.h"
33 
34 static int
35 setup(mpg123_handle *mh)
36 {
37 	long	rate;
38 	int	chan, enc;
39 
40 	if (mpg123_getformat(mh, &rate, &chan, &enc) != MPG123_OK) {
41 		log_warnx("mpg123_getformat failed");
42 		return 0;
43 	}
44 
45 	if (player_setup(mpg123_encsize(enc) * 8, rate, chan) == -1)
46 		err(1, "player_setup");
47 
48 	return 1;
49 }
50 
51 int
52 play_mp3(int fd, const char **errstr)
53 {
54 	static char	 buf[4096];
55 	size_t		 len;
56 	mpg123_handle	*mh;
57 	int64_t		 seek = -1;
58 	int		 err, ret = -1;
59 
60 	if ((mh = mpg123_new(NULL, NULL)) == NULL)
61 		fatal("mpg123_new");
62 
63 	if (mpg123_open_fd(mh, fd) != MPG123_OK) {
64 		*errstr = "mpg123_open_fd failed";
65 		close(fd);
66 		return -1;
67 	}
68 
69 	if (!setup(mh))
70 		goto done;
71 
72 	player_setduration(mpg123_length(mh));
73 
74 	for (;;) {
75 		if (seek != -1) {
76 			seek = mpg123_seek(mh, seek, SEEK_SET);
77 			if (seek < 0) {
78 				ret = 0;
79 				break;
80 			}
81 			player_setpos(seek);
82 		}
83 
84 		err = mpg123_read(mh, buf, sizeof(buf), &len);
85 		switch (err) {
86 		case MPG123_DONE:
87 			ret = 0;
88 			goto done;
89 		case MPG123_NEW_FORMAT:
90 			if (!setup(mh))
91 				goto done;
92 			break;
93 		case MPG123_OK:
94 			if (!play(buf, len, &seek)) {
95 				ret = 1;
96 				goto done;
97 			}
98 			break;
99 		default:
100 			log_warnx("error decoding mp3, "
101 			    "continuing nevertheless");
102 			break;
103 		}
104 	}
105 
106 done:
107 	mpg123_delete(mh);
108 	close(fd);
109 	return ret;
110 }