1 /* $NetBSD: parse.c,v 1.3 2021/05/08 13:03:40 nia Exp $ */
2 /*-
3 * Copyright (c) 2021 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Nia Alarie.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30 #include <sys/audioio.h>
31 #include <sys/ioctl.h>
32 #include <curses.h>
33 #include <stdlib.h>
34 #include "app.h"
35 #include "parse.h"
36
37 static struct aiomixer_class *get_class(struct aiomixer *, int);
38 static int compare_control(const void *, const void *);
39 static int compare_class(const void *, const void *);
40
41 static struct aiomixer_class *
get_class(struct aiomixer * aio,int class)42 get_class(struct aiomixer *aio, int class)
43 {
44 size_t i;
45
46 for (i = 0; i < aio->numclasses; ++i) {
47 if (aio->classes[i].index == class) {
48 return &aio->classes[i];
49 }
50 }
51 return NULL;
52 }
53
54 static int
compare_control(const void * pa,const void * pb)55 compare_control(const void *pa, const void *pb)
56 {
57 const struct aiomixer_control *a = (const struct aiomixer_control *)pa;
58 const struct aiomixer_control *b = (const struct aiomixer_control *)pb;
59
60 if (a->info.prev != AUDIO_MIXER_LAST ||
61 b->info.prev != AUDIO_MIXER_LAST) {
62 if (b->info.prev == a->info.index)
63 return -1;
64 if (a->info.prev == b->info.index)
65 return 1;
66 } else {
67 return strcmp(a->info.label.name, b->info.label.name);
68 }
69 return 0;
70 }
71
72 static int
compare_class(const void * pa,const void * pb)73 compare_class(const void *pa, const void *pb)
74 {
75 const struct aiomixer_class *a = (const struct aiomixer_class *)pa;
76 const struct aiomixer_class *b = (const struct aiomixer_class *)pb;
77
78 if (strcmp(a->name, AudioCoutputs) == 0)
79 return -1;
80 if (strcmp(b->name, AudioCoutputs) == 0)
81 return 1;
82
83 return strcmp(a->name, b->name);
84 }
85
86 int
aiomixer_parse(struct aiomixer * aio)87 aiomixer_parse(struct aiomixer *aio)
88 {
89 size_t i;
90 struct mixer_devinfo info;
91 struct aiomixer_class *class;
92 struct aiomixer_control *control;
93
94 for (info.index = 0;
95 ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
96 if (info.type != AUDIO_MIXER_CLASS)
97 continue;
98 if (aio->numclasses >= __arraycount(aio->classes))
99 break;
100 class = &aio->classes[aio->numclasses++];
101 memcpy(class->name, info.label.name, MAX_AUDIO_DEV_LEN);
102 class->index = info.index;
103 class->numcontrols = 0;
104 }
105 for (info.index = 0;
106 ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
107 if (info.type == AUDIO_MIXER_CLASS)
108 continue;
109 if (info.type == AUDIO_MIXER_VALUE) {
110 /* XXX workaround for hdaudio(4) bugs */
111 if (info.un.v.delta > AUDIO_MAX_GAIN)
112 continue;
113 if (info.un.v.num_channels == 0)
114 continue;
115 }
116 class = get_class(aio, info.mixer_class);
117 if (class == NULL)
118 break;
119 if (class->numcontrols >= __arraycount(class->controls))
120 break;
121 control = &class->controls[class->numcontrols++];
122 control->info = info;
123 }
124 qsort(aio->classes, aio->numclasses,
125 sizeof(struct aiomixer_class),
126 compare_class);
127 for (i = 0; i < aio->numclasses; ++i) {
128 class = &aio->classes[i];
129 qsort(class->controls, class->numcontrols,
130 sizeof(struct aiomixer_control),
131 compare_control);
132 }
133 return 0;
134 }
135
136