code.delx.au - pulseaudio/blob - src/modules/module-lirc.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2005-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32
  33 #include <lirc/lirc_client.h>
  34
  35 #include <pulse/xmalloc.h>
  36
  37 #include <pulsecore/module.h>
  38 #include <pulsecore/log.h>
  39 #include <pulsecore/namereg.h>
  40 #include <pulsecore/sink.h>
  41 #include <pulsecore/modargs.h>
  42 #include <pulsecore/macro.h>
  43
  44 #include "module-lirc-symdef.h"
  45
  46 PA_MODULE_AUTHOR("Lennart Poettering");
  47 PA_MODULE_DESCRIPTION("LIRC volume control");
  48 PA_MODULE_VERSION(PACKAGE_VERSION);
  49 PA_MODULE_LOAD_ONCE(TRUE);
  50 PA_MODULE_USAGE("config=<config file> sink=<sink name> appname=<lirc application name>");
  51
  52 static const char* const valid_modargs[] = {
  53     "config",
  54     "sink",
  55     "appname",
  56     NULL,
  57 };
  58
  59 struct userdata {
  60     int lirc_fd;
  61     pa_io_event *io;
  62     struct lirc_config *config;
  63     char *sink_name;
  64     pa_module *module;
  65     float mute_toggle_save;
  66 };
  67
  68 static int lirc_in_use = 0;
  69
  70 static void io_callback(pa_mainloop_api *io, PA_GCC_UNUSED pa_io_event *e, PA_GCC_UNUSED int fd, pa_io_event_flags_t events, void*userdata) {
  71     struct userdata *u = userdata;
  72     char *name = NULL, *code = NULL;
  73
  74     pa_assert(io);
  75     pa_assert(u);
  76
  77     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  78         pa_log("Lost connection to LIRC daemon.");
  79         goto fail;
  80     }
  81
  82     if (events & PA_IO_EVENT_INPUT) {
  83         char *c;
  84
  85         if (lirc_nextcode(&code) != 0 || !code) {
  86             pa_log("lirc_nextcode() failed.");
  87             goto fail;
  88         }
  89
  90         c = pa_xstrdup(code);
  91         c[strcspn(c, "\n\r")] = 0;
  92         pa_log_debug("Raw IR code '%s'", c);
  93         pa_xfree(c);
  94
  95         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  96             enum {
  97                 INVALID,
  98                 UP,
  99                 DOWN,
 100                 MUTE,
 101                 RESET,
 102                 MUTE_TOGGLE
 103             } volchange = INVALID;
 104
 105             pa_log_info("Translated IR code '%s'", name);
 106
 107             if (strcasecmp(name, "volume-up") == 0)
 108                 volchange = UP;
 109             else if (strcasecmp(name, "volume-down") == 0)
 110                 volchange = DOWN;
 111             else if (strcasecmp(name, "mute") == 0)
 112                 volchange = MUTE;
 113             else if (strcasecmp(name, "mute-toggle") == 0)
 114                 volchange = MUTE_TOGGLE;
 115             else if (strcasecmp(name, "reset") == 0)
 116                 volchange = RESET;
 117
 118             if (volchange == INVALID)
 119                 pa_log_warn("Recieved unknown IR code '%s'", name);
 120             else {
 121                 pa_sink *s;
 122
 123                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
 124                     pa_log("Failed to get sink '%s'", u->sink_name);
 125                 else {
 126                     int i;
 127                     pa_cvolume cv = *pa_sink_get_volume(s);
 128
 129 #define DELTA (PA_VOLUME_NORM/20)
 130
 131                     switch (volchange) {
 132                         case UP:
 133                             for (i = 0; i < cv.channels; i++) {
 134                                 cv.values[i] += DELTA;
 135
 136                                 if (cv.values[i] > PA_VOLUME_NORM)
 137                                     cv.values[i] = PA_VOLUME_NORM;
 138                             }
 139
 140                             pa_sink_set_volume(s, &cv);
 141                             break;
 142
 143                         case DOWN:
 144                             for (i = 0; i < cv.channels; i++) {
 145                                 if (cv.values[i] >= DELTA)
 146                                     cv.values[i] -= DELTA;
 147                                 else
 148                                     cv.values[i] = PA_VOLUME_MUTED;
 149                             }
 150
 151                             pa_sink_set_volume(s, &cv);
 152                             break;
 153
 154                         case MUTE:
 155                             pa_sink_set_mute(s, 0);
 156                             break;
 157
 158                         case RESET:
 159                             pa_sink_set_mute(s, 1);
 160                             break;
 161
 162                         case MUTE_TOGGLE:
 163
 164                             pa_sink_set_mute(s, !pa_sink_get_mute(s));
 165                             break;
 166
 167                         case INVALID:
 168                             ;
 169                     }
 170                 }
 171             }
 172         }
 173     }
 174
 175     pa_xfree(code);
 176
 177     return;
 178
 179 fail:
 180     u->module->core->mainloop->io_free(u->io);
 181     u->io = NULL;
 182
 183     pa_module_unload_request(u->module);
 184
 185     pa_xfree(code);
 186 }
 187
 188 int pa__init(pa_module*m) {
 189     pa_modargs *ma = NULL;
 190     struct userdata *u;
 191
 192     pa_assert(m);
 193
 194     if (lirc_in_use) {
 195         pa_log("module-lirc may no be loaded twice.");
 196         return -1;
 197     }
 198
 199     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 200         pa_log("Failed to parse module arguments");
 201         goto fail;
 202     }
 203
 204     m->userdata = u = pa_xnew(struct userdata, 1);
 205     u->module = m;
 206     u->io = NULL;
 207     u->config = NULL;
 208     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 209     u->lirc_fd = -1;
 210     u->mute_toggle_save = 0;
 211
 212     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
 213         pa_log("lirc_init() failed.");
 214         goto fail;
 215     }
 216
 217     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 218         pa_log("lirc_readconfig() failed.");
 219         goto fail;
 220     }
 221
 222     u->io = m->core->mainloop->io_new(m->core->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 223
 224     lirc_in_use = 1;
 225
 226     pa_modargs_free(ma);
 227
 228     return 0;
 229
 230 fail:
 231
 232     if (ma)
 233         pa_modargs_free(ma);
 234
 235     pa__done(m);
 236     return -1;
 237 }
 238
 239 void pa__done(pa_module*m) {
 240     struct userdata *u;
 241     pa_assert(m);
 242
 243     if (!(u = m->userdata))
 244         return;
 245
 246     if (u->io)
 247         m->core->mainloop->io_free(u->io);
 248
 249     if (u->config)
 250         lirc_freeconfig(u->config);
 251
 252     if (u->lirc_fd >= 0)
 253         lirc_deinit();
 254
 255     pa_xfree(u->sink_name);
 256     pa_xfree(u);
 257
 258     lirc_in_use = 0;
 259 }