code.delx.au - pulseaudio/blob - src/modules/x11/module-x11-cork-request.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2009 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/extensions/XTest.h>
  32 #include <X11/XF86keysym.h>
  33 #include <X11/keysym.h>
  34
  35 #include <pulse/xmalloc.h>
  36
  37 #include <pulsecore/module.h>
  38 #include <pulsecore/modargs.h>
  39 #include <pulsecore/log.h>
  40 #include <pulsecore/x11wrap.h>
  41 #include <pulsecore/core-util.h>
  42
  43 #include "module-x11-cork-request-symdef.h"
  44
  45 PA_MODULE_AUTHOR("Lennart Poettering");
  46 PA_MODULE_DESCRIPTION("Synthesize X11 media key events when cork/uncork is requested");
  47 PA_MODULE_VERSION(PACKAGE_VERSION);
  48 PA_MODULE_LOAD_ONCE(false);
  49 PA_MODULE_USAGE("display=<X11 display>");
  50
  51 static const char* const valid_modargs[] = {
  52     "display",
  53     NULL
  54 };
  55
  56 struct userdata {
  57     pa_module *module;
  58
  59     pa_x11_wrapper *x11_wrapper;
  60     pa_x11_client *x11_client;
  61
  62     pa_hook_slot *hook_slot;
  63 };
  64
  65 static void x11_kill_cb(pa_x11_wrapper *w, void *userdata) {
  66     struct userdata *u = userdata;
  67
  68     pa_assert(w);
  69     pa_assert(u);
  70     pa_assert(u->x11_wrapper == w);
  71
  72     if (u->x11_client) {
  73         pa_x11_client_free(u->x11_client);
  74         u->x11_client = NULL;
  75     }
  76
  77     if (u->x11_wrapper) {
  78         pa_x11_wrapper_unref(u->x11_wrapper);
  79         u->x11_wrapper = NULL;
  80     }
  81
  82     pa_module_unload_request(u->module, true);
  83 }
  84
  85 static pa_hook_result_t sink_input_send_event_hook_cb(
  86         pa_core *c,
  87         pa_sink_input_send_event_hook_data *data,
  88         struct userdata *u) {
  89
  90     KeySym sym;
  91     KeyCode code;
  92     Display *display;
  93
  94     pa_assert(c);
  95     pa_assert(data);
  96     pa_assert(u);
  97
  98     if (pa_streq(data->event, PA_STREAM_EVENT_REQUEST_CORK))
  99         sym = XF86XK_AudioPause;
 100     else if (pa_streq(data->event, PA_STREAM_EVENT_REQUEST_UNCORK))
 101         sym = XF86XK_AudioPlay;
 102     else
 103         return PA_HOOK_OK;
 104
 105     pa_log_debug("Triggering X11 keysym: %s", XKeysymToString(sym));
 106
 107     display = pa_x11_wrapper_get_display(u->x11_wrapper);
 108     code = XKeysymToKeycode(display, sym);
 109
 110     XTestFakeKeyEvent(display, code, True, CurrentTime);
 111     XSync(display, False);
 112
 113     XTestFakeKeyEvent(display, code, False, CurrentTime);
 114     XSync(display, False);
 115
 116     return PA_HOOK_OK;
 117 }
 118
 119 int pa__init(pa_module *m) {
 120     struct userdata *u;
 121     pa_modargs *ma;
 122     int xtest_event_base, xtest_error_base;
 123     int major_version, minor_version;
 124
 125     pa_assert(m);
 126
 127     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 128         pa_log("failed to parse module arguments");
 129         goto fail;
 130     }
 131
 132     m->userdata = u = pa_xnew0(struct userdata, 1);
 133     u->module = m;
 134
 135     if (!(u->x11_wrapper = pa_x11_wrapper_get(m->core, pa_modargs_get_value(ma, "display", NULL))))
 136         goto fail;
 137
 138     if (!XTestQueryExtension(
 139                 pa_x11_wrapper_get_display(u->x11_wrapper),
 140                 &xtest_event_base, &xtest_error_base,
 141                 &major_version, &minor_version)) {
 142
 143         pa_log("XTest extension not supported.");
 144         goto fail;
 145     }
 146
 147     pa_log_debug("XTest %i.%i supported.", major_version, minor_version);
 148
 149     u->x11_client = pa_x11_client_new(u->x11_wrapper, NULL, x11_kill_cb, u);
 150
 151     u->hook_slot = pa_hook_connect(
 152             &m->core->hooks[PA_CORE_HOOK_SINK_INPUT_SEND_EVENT],
 153             PA_HOOK_NORMAL,
 154             (pa_hook_cb_t) sink_input_send_event_hook_cb, u);
 155
 156     pa_modargs_free(ma);
 157
 158     return 0;
 159
 160 fail:
 161     if (ma)
 162         pa_modargs_free(ma);
 163
 164     pa__done(m);
 165
 166     return -1;
 167 }
 168
 169 void pa__done(pa_module*m) {
 170     struct userdata*u;
 171
 172     pa_assert(m);
 173
 174     if (!(u = m->userdata))
 175         return;
 176
 177     if (u->x11_client)
 178         pa_x11_client_free(u->x11_client);
 179
 180     if (u->x11_wrapper)
 181         pa_x11_wrapper_unref(u->x11_wrapper);
 182
 183     if (u->hook_slot)
 184         pa_hook_slot_free(u->hook_slot);
 185
 186     pa_xfree(u);
 187 }