code.delx.au - pulseaudio/blob - 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 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 int lirc_in_use = 0;
  67
  68 static void io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void*userdata) {
  69     struct userdata *u = userdata;
  70     char *name = NULL, *code = NULL;
  71
  72     pa_assert(io);
  73     pa_assert(u);
  74
  75     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  76         pa_log("Lost connection to LIRC daemon.");
  77         goto fail;
  78     }
  79
  80     if (events & PA_IO_EVENT_INPUT) {
  81         char *c;
  82
  83         if (lirc_nextcode(&code) != 0 || !code) {
  84             pa_log("lirc_nextcode() failed.");
  85             goto fail;
  86         }
  87
  88         c = pa_xstrdup(code);
  89         c[strcspn(c, "\n\r")] = 0;
  90         pa_log_debug("Raw IR code '%s'", c);
  91         pa_xfree(c);
  92
  93         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  94             enum {
  95                 INVALID,
  96                 UP,
  97                 DOWN,
  98                 MUTE,
  99                 RESET,
 100                 MUTE_TOGGLE
 101             } volchange = INVALID;
 102
 103             pa_log_info("Translated IR code '%s'", name);
 104
 105             if (strcasecmp(name, "volume-up") == 0)
 106                 volchange = UP;
 107             else if (strcasecmp(name, "volume-down") == 0)
 108                 volchange = DOWN;
 109             else if (strcasecmp(name, "mute") == 0)
 110                 volchange = MUTE;
 111             else if (strcasecmp(name, "mute-toggle") == 0)
 112                 volchange = MUTE_TOGGLE;
 113             else if (strcasecmp(name, "reset") == 0)
 114                 volchange = RESET;
 115
 116             if (volchange == INVALID)
 117                 pa_log_warn("Recieved unknown IR code '%s'", name);
 118             else {
 119                 pa_sink *s;
 120
 121                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK)))
 122                     pa_log("Failed to get sink '%s'", u->sink_name);
 123                 else {
 124                     int i;
 125                     pa_cvolume cv = *pa_sink_get_volume(s, FALSE);
 126
 127 #define DELTA (PA_VOLUME_NORM/20)
 128
 129                     switch (volchange) {
 130                         case UP:
 131                             for (i = 0; i < cv.channels; i++) {
 132                                 cv.values[i] += DELTA;
 133
 134                                 if (cv.values[i] > PA_VOLUME_NORM)
 135                                     cv.values[i] = PA_VOLUME_NORM;
 136                             }
 137
 138                             pa_sink_set_volume(s, &cv);
 139                             break;
 140
 141                         case DOWN:
 142                             for (i = 0; i < cv.channels; i++) {
 143                                 if (cv.values[i] >= DELTA)
 144                                     cv.values[i] -= DELTA;
 145                                 else
 146                                     cv.values[i] = PA_VOLUME_MUTED;
 147                             }
 148
 149                             pa_sink_set_volume(s, &cv);
 150                             break;
 151
 152                         case MUTE:
 153                             pa_sink_set_mute(s, 0);
 154                             break;
 155
 156                         case RESET:
 157                             pa_sink_set_mute(s, 1);
 158                             break;
 159
 160                         case MUTE_TOGGLE:
 161
 162                             pa_sink_set_mute(s, !pa_sink_get_mute(s, FALSE));
 163                             break;
 164
 165                         case INVALID:
 166                             ;
 167                     }
 168                 }
 169             }
 170         }
 171     }
 172
 173     pa_xfree(code);
 174
 175     return;
 176
 177 fail:
 178     u->module->core->mainloop->io_free(u->io);
 179     u->io = NULL;
 180
 181     pa_module_unload_request(u->module, TRUE);
 182
 183     pa_xfree(code);
 184 }
 185
 186 int pa__init(pa_module*m) {
 187     pa_modargs *ma = NULL;
 188     struct userdata *u;
 189
 190     pa_assert(m);
 191
 192     if (lirc_in_use) {
 193         pa_log("module-lirc may no be loaded twice.");
 194         return -1;
 195     }
 196
 197     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 198         pa_log("Failed to parse module arguments");
 199         goto fail;
 200     }
 201
 202     m->userdata = u = pa_xnew(struct userdata, 1);
 203     u->module = m;
 204     u->io = NULL;
 205     u->config = NULL;
 206     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 207     u->lirc_fd = -1;
 208     u->mute_toggle_save = 0;
 209
 210     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
 211         pa_log("lirc_init() failed.");
 212         goto fail;
 213     }
 214
 215     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 216         pa_log("lirc_readconfig() failed.");
 217         goto fail;
 218     }
 219
 220     u->io = m->core->mainloop->io_new(m->core->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 221
 222     lirc_in_use = 1;
 223
 224     pa_modargs_free(ma);
 225
 226     return 0;
 227
 228 fail:
 229
 230     if (ma)
 231         pa_modargs_free(ma);
 232
 233     pa__done(m);
 234     return -1;
 235 }
 236
 237 void pa__done(pa_module*m) {
 238     struct userdata *u;
 239     pa_assert(m);
 240
 241     if (!(u = m->userdata))
 242         return;
 243
 244     if (u->io)
 245         m->core->mainloop->io_free(u->io);
 246
 247     if (u->config)
 248         lirc_freeconfig(u->config);
 249
 250     if (u->lirc_fd >= 0)
 251         lirc_deinit();
 252
 253     pa_xfree(u->sink_name);
 254     pa_xfree(u);
 255
 256     lirc_in_use = 0;
 257 }