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/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
20 
21 #include <err.h>
22 #include <event.h>
23 #include <fcntl.h>
24 #include <math.h>
25 #include <inttypes.h>
26 #include <sndio.h>
27 #include <stdio.h>
28 #include <stdint.h>
29 #include <imsg.h>
30 #include <unistd.h>
31 
32 #include <opusfile.h>
33 
34 #include "amused.h"
35 
36 #ifndef nitems
37 #define nitems(x) (sizeof(x)/sizeof(x[0]))
38 #endif
39 
40 void
41 play_opus(int fd)
42 {
43 	static uint16_t pcm[BUFSIZ];
44 	static uint8_t out[BUFSIZ * 2];
45 	OggOpusFile *of;
46 	void *f;
47 	int ret;
48 	OpusFileCallbacks cb = {NULL, NULL, NULL, NULL};
49 	int i, li, prev_li = -1;
50 
51 	if ((f = op_fdopen(&cb, fd, "r")) == NULL)
52 		err(1, "fdopen");
53 
54 	of = op_open_callbacks(f, &cb, NULL, 0, &ret);
55 	if (of == NULL)
56 		errx(1, "failed open opus file");
57 
58 	for (;;) {
59 		if (player_shouldstop())
60 			break;
61 
62 		ret = op_read_stereo(of, pcm, nitems(pcm));
63 		if (ret == OP_HOLE) /* corrupt file segment? */
64 			continue;
65 		if (ret < 0)
66 			errx(1, "error decoding file (%d)", ret);
67 		if (ret == 0)
68 			break; /* eof */
69 
70 		li = op_current_link(of);
71 		if (li != prev_li) {
72 			const OpusHead *head;
73 
74 			prev_li = li;
75 
76 			head = op_head(of, li);
77 			if (head->input_sample_rate) {
78 				if (player_setrate(head->input_sample_rate)
79 				    == -1)
80 					err(1, "player_setrate");
81 			}
82 		}
83 
84 		for (i = 0; i < 2*ret; ++i) {
85 			out[2*i+0] = pcm[i] & 0xFF;
86 			out[2*i+1] = (pcm[i] >> 8) & 0xFF;
87 		}
88 		sio_write(hdl, out, 4*ret);
89 	}
90 
91 	op_free(of);
92 }