1 /*
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021 Goran Mekić
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include "ossinit.h"
29
30 int
main()31 main()
32 {
33 config_t config = {
34 .device = "/dev/dsp",
35 .channels = -1,
36 .format = format,
37 .frag = -1,
38 .sample_rate = 48000,
39 .sample_size = sizeof(sample_t),
40 .buffer_info.fragments = -1,
41 .mmap = 0,
42 };
43
44 /* Initialize device */
45 oss_init(&config);
46
47 /*
48 * Allocate input and output buffers so that their size match
49 * frag_size
50 */
51 int ret;
52 int bytes = config.buffer_info.bytes;
53 int8_t *ibuf = malloc(bytes);
54 int8_t *obuf = malloc(bytes);
55 sample_t *channels = malloc(bytes);
56
57 printf(
58 "bytes: %d, fragments: %d, fragsize: %d, fragstotal: %d, samples: %d\n",
59 bytes,
60 config.buffer_info.fragments,
61 config.buffer_info.fragsize,
62 config.buffer_info.fragstotal,
63 config.sample_count
64 );
65
66 /* Minimal engine: read input and copy it to the output */
67 for (;;) {
68 ret = read(config.fd, ibuf, bytes);
69 if (ret < bytes) {
70 fprintf(
71 stderr,
72 "Requested %d bytes, but read %d!\n",
73 bytes,
74 ret
75 );
76 break;
77 }
78 oss_split(&config, (sample_t *)ibuf, channels);
79 /* All processing will happen here */
80 oss_merge(&config, channels, (sample_t *)obuf);
81 ret = write(config.fd, obuf, bytes);
82 if (ret < bytes) {
83 fprintf(
84 stderr,
85 "Requested %d bytes, but wrote %d!\n",
86 bytes,
87 ret
88 );
89 break;
90 }
91 }
92
93 /* Cleanup */
94 free(channels);
95 free(obuf);
96 free(ibuf);
97 close(config.fd);
98 return (0);
99 }
100