src/modules/module-lirc.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2005-2006 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 <unistd.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30
  31 #include <lirc/lirc_client.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/sink.h>
  39 #include <pulsecore/modargs.h>
  40 #include <pulsecore/macro.h>
  41
  42 #include "module-lirc-symdef.h"
  43
  44 PA_MODULE_AUTHOR("Lennart Poettering");
  45 PA_MODULE_DESCRIPTION("LIRC volume control");
  46 PA_MODULE_VERSION(PACKAGE_VERSION);
  47 PA_MODULE_LOAD_ONCE(TRUE);
  48 PA_MODULE_USAGE("config=<config file> sink=<sink name> appname=<lirc application name>");
  49
  50 static const char* const valid_modargs[] = {
  51     "config",
  52     "sink",
  53     "appname",
  54     NULL,
  55 };
  56
  57 struct userdata {
  58     int lirc_fd;
  59     pa_io_event *io;
  60     struct lirc_config *config;
  61     char *sink_name;
  62     pa_module *module;
  63     float mute_toggle_save;
  64 };
  65
  66 static void io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void*userdata) {
  67     struct userdata *u = userdata;
  68     char *name = NULL, *code = NULL;
  69
  70     pa_assert(io);
  71     pa_assert(u);
  72
  73     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  74         pa_log("Lost connection to LIRC daemon.");
  75         goto fail;
  76     }
  77
  78     if (events & PA_IO_EVENT_INPUT) {
  79         char *c;
  80
  81         if (lirc_nextcode(&code) != 0 || !code) {
  82             pa_log("lirc_nextcode() failed.");
  83             goto fail;
  84         }
  85
  86         c = pa_xstrdup(code);
  87         c[strcspn(c, "\n\r")] = 0;
  88         pa_log_debug("Raw IR code '%s'", c);
  89         pa_xfree(c);
  90
  91         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  92             enum {
  93                 INVALID,
  94                 UP,
  95                 DOWN,
  96                 MUTE,
  97                 RESET,
  98                 MUTE_TOGGLE
  99             } volchange = INVALID;
 100
 101             pa_log_info("Translated IR code '%s'", name);
 102
 103             if (strcasecmp(name, "volume-up") == 0)
 104                 volchange = UP;
 105             else if (strcasecmp(name, "volume-down") == 0)
 106                 volchange = DOWN;
 107             else if (strcasecmp(name, "mute") == 0)
 108                 volchange = MUTE;
 109             else if (strcasecmp(name, "mute-toggle") == 0)
 110                 volchange = MUTE_TOGGLE;
 111             else if (strcasecmp(name, "reset") == 0)
 112                 volchange = RESET;
 113
 114             if (volchange == INVALID)
 115                 pa_log_warn("Received unknown IR code '%s'", name);
 116             else {
 117                 pa_sink *s;
 118
 119                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK)))
 120                     pa_log("Failed to get sink '%s'", u->sink_name);
 121                 else {
 122                     int i;
 123                     pa_cvolume cv = *pa_sink_get_volume(s, FALSE, FALSE);
 124
 125 #define DELTA (PA_VOLUME_NORM/20)
 126
 127                     switch (volchange) {
 128                         case UP:
 129                             for (i = 0; i < cv.channels; i++) {
 130                                 if (cv.values[i] < PA_VOLUME_MAX - DELTA)
 131                                     cv.values[i] += DELTA;
 132                                 else
 133                                     cv.values[i] = PA_VOLUME_MAX;
 134                             }
 135
 136                             pa_sink_set_volume(s, &cv, TRUE, TRUE, TRUE, TRUE);
 137                             break;
 138
 139                         case DOWN:
 140                             for (i = 0; i < cv.channels; i++) {
 141                                 if (cv.values[i] > DELTA)
 142                                     cv.values[i] -= DELTA;
 143                                 else
 144                                     cv.values[i] = PA_VOLUME_MUTED;
 145                             }
 146
 147                             pa_sink_set_volume(s, &cv, TRUE, TRUE, TRUE, TRUE);
 148                             break;
 149
 150                         case MUTE:
 151                             pa_sink_set_mute(s, TRUE, TRUE);
 152                             break;
 153
 154                         case RESET:
 155                             pa_sink_set_mute(s, FALSE, TRUE);
 156                             break;
 157
 158                         case MUTE_TOGGLE:
 159
 160                             pa_sink_set_mute(s, !pa_sink_get_mute(s, FALSE), TRUE);
 161                             break;
 162
 163                         case INVALID:
 164                             pa_assert_not_reached();
 165                     }
 166                 }
 167             }
 168         }
 169     }
 170
 171     pa_xfree(code);
 172
 173     return;
 174
 175 fail:
 176     u->module->core->mainloop->io_free(u->io);
 177     u->io = NULL;
 178
 179     pa_module_unload_request(u->module, TRUE);
 180
 181     pa_xfree(code);
 182 }
 183
 184 int pa__init(pa_module*m) {
 185     pa_modargs *ma = NULL;
 186     struct userdata *u;
 187
 188     pa_assert(m);
 189
 190     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 191         pa_log("Failed to parse module arguments");
 192         goto fail;
 193     }
 194
 195     m->userdata = u = pa_xnew(struct userdata, 1);
 196     u->module = m;
 197     u->io = NULL;
 198     u->config = NULL;
 199     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 200     u->lirc_fd = -1;
 201     u->mute_toggle_save = 0;
 202
 203     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
 204         pa_log("lirc_init() failed.");
 205         goto fail;
 206     }
 207
 208     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 209         pa_log("lirc_readconfig() failed.");
 210         goto fail;
 211     }
 212
 213     u->io = m->core->mainloop->io_new(m->core->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 214
 215     pa_modargs_free(ma);
 216
 217     return 0;
 218
 219 fail:
 220
 221     if (ma)
 222         pa_modargs_free(ma);
 223
 224     pa__done(m);
 225     return -1;
 226 }
 227
 228 void pa__done(pa_module*m) {
 229     struct userdata *u;
 230     pa_assert(m);
 231
 232     if (!(u = m->userdata))
 233         return;
 234
 235     if (u->io)
 236         m->core->mainloop->io_free(u->io);
 237
 238     if (u->config)
 239         lirc_freeconfig(u->config);
 240
 241     if (u->lirc_fd >= 0)
 242         lirc_deinit();
 243
 244     pa_xfree(u->sink_name);
 245     pa_xfree(u);
 246 }