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_USAGE("config=<config file> sink=<sink name> appname=<lirc application name>")
  50
  51 static const char* const valid_modargs[] = {
  52     "config",
  53     "sink",
  54     "appname",
  55     NULL,
  56 };
  57
  58 struct userdata {
  59     int lirc_fd;
  60     pa_io_event *io;
  61     struct lirc_config *config;
  62     char *sink_name;
  63     pa_module *module;
  64     float mute_toggle_save;
  65 };
  66
  67 static int lirc_in_use = 0;
  68
  69 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) {
  70     struct userdata *u = userdata;
  71     char *name = NULL, *code = NULL;
  72
  73     pa_assert(io);
  74     pa_assert(u);
  75
  76     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  77         pa_log("Lost connection to LIRC daemon.");
  78         goto fail;
  79     }
  80
  81     if (events & PA_IO_EVENT_INPUT) {
  82         char *c;
  83
  84         if (lirc_nextcode(&code) != 0 || !code) {
  85             pa_log("lirc_nextcode() failed.");
  86             goto fail;
  87         }
  88
  89         c = pa_xstrdup(code);
  90         c[strcspn(c, "\n\r")] = 0;
  91         pa_log_debug("Raw IR code '%s'", c);
  92         pa_xfree(c);
  93
  94         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  95             enum {
  96                 INVALID,
  97                 UP,
  98                 DOWN,
  99                 MUTE,
 100                 RESET,
 101                 MUTE_TOGGLE
 102             } volchange = INVALID;
 103
 104             pa_log_info("Translated IR code '%s'", name);
 105
 106             if (strcasecmp(name, "volume-up") == 0)
 107                 volchange = UP;
 108             else if (strcasecmp(name, "volume-down") == 0)
 109                 volchange = DOWN;
 110             else if (strcasecmp(name, "mute") == 0)
 111                 volchange = MUTE;
 112             else if (strcasecmp(name, "mute-toggle") == 0)
 113                 volchange = MUTE_TOGGLE;
 114             else if (strcasecmp(name, "reset") == 0)
 115                 volchange = RESET;
 116
 117             if (volchange == INVALID)
 118                 pa_log_warn("Recieved unknown IR code '%s'", name);
 119             else {
 120                 pa_sink *s;
 121
 122                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
 123                     pa_log("Failed to get sink '%s'", u->sink_name);
 124                 else {
 125                     int i;
 126                     pa_cvolume cv = *pa_sink_get_volume(s);
 127
 128 #define DELTA (PA_VOLUME_NORM/20)
 129
 130                     switch (volchange) {
 131                         case UP:
 132                             for (i = 0; i < cv.channels; i++) {
 133                                 cv.values[i] += DELTA;
 134
 135                                 if (cv.values[i] > PA_VOLUME_NORM)
 136                                     cv.values[i] = PA_VOLUME_NORM;
 137                             }
 138
 139                             pa_sink_set_volume(s, &cv);
 140                             break;
 141
 142                         case DOWN:
 143                             for (i = 0; i < cv.channels; i++) {
 144                                 if (cv.values[i] >= DELTA)
 145                                     cv.values[i] -= DELTA;
 146                                 else
 147                                     cv.values[i] = PA_VOLUME_MUTED;
 148                             }
 149
 150                             pa_sink_set_volume(s, &cv);
 151                             break;
 152
 153                         case MUTE:
 154                             pa_sink_set_mute(s, 0);
 155                             break;
 156
 157                         case RESET:
 158                             pa_sink_set_mute(s, 1);
 159                             break;
 160
 161                         case MUTE_TOGGLE:
 162
 163                             pa_sink_set_mute(s, !pa_sink_get_mute(s));
 164                             break;
 165
 166                         case INVALID:
 167                             ;
 168                     }
 169                 }
 170             }
 171         }
 172     }
 173
 174     pa_xfree(code);
 175
 176     return;
 177
 178 fail:
 179     u->module->core->mainloop->io_free(u->io);
 180     u->io = NULL;
 181
 182     pa_module_unload_request(u->module);
 183
 184     pa_xfree(code);
 185 }
 186
 187 int pa__init(pa_module*m) {
 188     pa_modargs *ma = NULL;
 189     struct userdata *u;
 190
 191     pa_assert(m);
 192
 193     if (lirc_in_use) {
 194         pa_log("module-lirc may no be loaded twice.");
 195         return -1;
 196     }
 197
 198     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 199         pa_log("Failed to parse module arguments");
 200         goto fail;
 201     }
 202
 203     m->userdata = u = pa_xnew(struct userdata, 1);
 204     u->module = m;
 205     u->io = NULL;
 206     u->config = NULL;
 207     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 208     u->lirc_fd = -1;
 209     u->mute_toggle_save = 0;
 210
 211     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
 212         pa_log("lirc_init() failed.");
 213         goto fail;
 214     }
 215
 216     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 217         pa_log("lirc_readconfig() failed.");
 218         goto fail;
 219     }
 220
 221     u->io = m->core->mainloop->io_new(m->core->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 222
 223     lirc_in_use = 1;
 224
 225     pa_modargs_free(ma);
 226
 227     return 0;
 228
 229 fail:
 230
 231     if (ma)
 232         pa_modargs_free(ma);
 233
 234     pa__done(m);
 235     return -1;
 236 }
 237
 238 void pa__done(pa_module*m) {
 239     struct userdata *u;
 240     pa_assert(m);
 241
 242     if (!(u = m->userdata))
 243         return;
 244
 245     if (u->io)
 246         m->core->mainloop->io_free(u->io);
 247
 248     if (u->config)
 249         lirc_freeconfig(u->config);
 250
 251     if (u->lirc_fd >= 0)
 252         lirc_deinit();
 253
 254     pa_xfree(u->sink_name);
 255     pa_xfree(u);
 256
 257     lirc_in_use = 0;
 258 }