summaryrefslogtreecommitdiffstats
path: root/polyp/module-x11-bell.c
blob: 5449e944dee65b0e3be912450d63f2f8c0c6609b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>

#include <X11/Xlib.h>
#include <X11/XKBlib.h>

#include "module.h"
#include "sink.h"
#include "scache.h"
#include "modargs.h"
#include "xmalloc.h"
#include "namereg.h"

struct x11_source {
    struct pa_io_event *io_event;
    struct x11_source *next;
};

struct userdata {
    struct pa_core *core;
    Display *display;
    struct x11_source *x11_sources;
    int xkb_event_base;

    char *sink_name;
    char *scache_item;
};

static const char* const valid_modargs[] = {
    "sink",
    "sample",
    "display",
    NULL
};

static int ring_bell(struct userdata *u, int percent) {
    struct pa_sink *s;
    assert(u);

    if (!(s = pa_namereg_get(u->core, u->sink_name, PA_NAMEREG_SINK, 1))) {
        fprintf(stderr, __FILE__": Invalid sink\n");
        return -1;
    }

    if (pa_scache_play_item(u->core, u->scache_item, s, percent*2) < 0) {
        fprintf(stderr, __FILE__": Failed to play sample\n");
        return -1;
    }

    return 0;
}

static void io_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
    struct userdata *u = userdata;
    assert(u);
    
    while (XPending(u->display)) {
        XEvent e;
        XkbBellNotifyEvent *bne;
        XNextEvent(u->display, &e);

        if (((XkbEvent*) &e)->any.xkb_type != XkbBellNotify)
            continue;

        bne = ((XkbBellNotifyEvent*) &e);
            
        if (ring_bell(u, bne->percent) < 0) {
            fprintf(stderr, __FILE__": Ringing bell failed, reverting to X11 device bell.\n");
            XkbForceDeviceBell(u->display, bne->device, bne->bell_class, bne->bell_id, bne->percent);
        }
    }
}

static void new_io_source(struct userdata *u, int fd) {
    struct x11_source *s;

    s = pa_xmalloc(sizeof(struct x11_source));
    s->io_event = u->core->mainloop->io_new(u->core->mainloop, fd, PA_IO_EVENT_INPUT, io_callback, u);
    assert(s->io_event);
    s->next = u->x11_sources;
    u->x11_sources = s;
}

int pa_module_init(struct pa_core *c, struct pa_module*m) {
    struct userdata *u = NULL;
    struct pa_modargs *ma = NULL;
    int major, minor;
    unsigned int auto_ctrls, auto_values;
    assert(c && m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        fprintf(stderr, __FILE__": failed to parse module arguments\n");
        goto fail;
    }
    
    m->userdata = u = pa_xmalloc(sizeof(struct userdata));
    u->core = c;
    u->display = NULL;
    u->x11_sources = NULL;
    u->scache_item = pa_xstrdup(pa_modargs_get_value(ma, "sample", "x11-bell"));
    u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));

    if (!(u->display = XOpenDisplay(pa_modargs_get_value(ma, "display", NULL)))) {
        fprintf(stderr, __FILE__": XOpenDisplay() failed\n");
        goto fail;
    }

    new_io_source(u, ConnectionNumber(u->display));

    major = XkbMajorVersion;
    minor = XkbMinorVersion;
    
    if (!XkbLibraryVersion(&major, &minor)) {
        fprintf(stderr, __FILE__": XkbLibraryVersion() failed\n");
        goto fail;
    }

    major = XkbMajorVersion;
    minor = XkbMinorVersion;

    if (!XkbQueryExtension(u->display, NULL, &u->xkb_event_base, NULL, &major, &minor)) {
        fprintf(stderr, __FILE__": XkbQueryExtension() failed\n");
        goto fail;
    }

    XkbSelectEvents(u->display, XkbUseCoreKbd, XkbBellNotifyMask, XkbBellNotifyMask);
    auto_ctrls = auto_values = XkbAudibleBellMask;
    XkbSetAutoResetControls(u->display, XkbAudibleBellMask, &auto_ctrls, &auto_values);
    XkbChangeEnabledControls(u->display, XkbUseCoreKbd, XkbAudibleBellMask, 0);

    pa_modargs_free(ma);
    
    return 0;
    
fail:
    if (ma)
        pa_modargs_free(ma);
    if (m->userdata)
        pa_module_done(c, m);
    return -1;
}

void pa_module_done(struct pa_core *c, struct pa_module*m) {
    struct userdata *u = m->userdata;
    assert(c && m && u);

    while (u->x11_sources) {
        struct x11_source *s = u->x11_sources;
        u->x11_sources = u->x11_sources->next;
        c->mainloop->io_free(s->io_event);
        pa_xfree(s);
    }

    pa_xfree(u->scache_item);
    
    if (u->display)
        XCloseDisplay(u->display);
    pa_xfree(u);
}