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 <limits.h>
27 #include <sndio.h>
28 #include <stdio.h>
29 #include <stdint.h>
30 #include <imsg.h>
31 #include <unistd.h>
32 
33 #include <opusfile.h>
34 
35 #include "amused.h"
36 #include "log.h"
37 
38 #ifndef nitems
39 #define nitems(x) (sizeof(x)/sizeof(x[0]))
40 #endif
41 
42 void
43 play_opus(int fd)
44 {
45 	static uint16_t pcm[BUFSIZ];
46 	static uint8_t out[BUFSIZ * 2];
47 	OggOpusFile *of;
48 	void *f;
49 	int ret;
50 	OpusFileCallbacks cb = {NULL, NULL, NULL, NULL};
51 	int i, li, prev_li = -1;
52 
53 	if ((f = op_fdopen(&cb, fd, "r")) == NULL)
54 		err(1, "fdopen");
55 
56 	of = op_open_callbacks(f, &cb, NULL, 0, &ret);
57 	if (of == NULL) {
58 		close(fd);
59 		return;
60 	}
61 
62 	for (;;) {
63 		if (player_shouldstop())
64 			break;
65 
66 		/* NB: will downmix multichannels files into two channels */
67 		ret = op_read_stereo(of, pcm, nitems(pcm));
68 		if (ret == OP_HOLE) /* corrupt file segment? */
69 			continue;
70 		if (ret < 0) {
71 			log_warnx("error %d decoding file", ret);
72 			break;
73 		}
74 		if (ret == 0)
75 			break; /* eof */
76 
77 		li = op_current_link(of);
78 		if (li != prev_li) {
79 			const OpusHead *head;
80 
81 			prev_li = li;
82 
83 			head = op_head(of, li);
84 			if (head->input_sample_rate &&
85 			    player_setup(16, head->input_sample_rate, 2) == -1)
86 				err(1, "player_setrate");
87 		}
88 
89 		for (i = 0; i < 2*ret; ++i) {
90 			out[2*i+0] = pcm[i] & 0xFF;
91 			out[2*i+1] = (pcm[i] >> 8) & 0xFF;
92 		}
93 		sio_write(hdl, out, 4*ret);
94 	}
95 
96 	op_free(of);
97 }