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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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 <assert.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <lirc/lirc_client.h>
  31 #include <stdlib.h>
  32
  33 #include <polyp/xmalloc.h>
  34
  35 #include <polypcore/module.h>
  36 #include <polypcore/log.h>
  37 #include <polypcore/namereg.h>
  38 #include <polypcore/sink.h>
  39 #include <polypcore/modargs.h>
  40
  41 #include "module-lirc-symdef.h"
  42
  43 PA_MODULE_AUTHOR("Lennart Poettering")
  44 PA_MODULE_DESCRIPTION("LIRC volume control")
  45 PA_MODULE_VERSION(PACKAGE_VERSION)
  46 PA_MODULE_USAGE("config=<config file> sink=<sink name> appname=<lirc application name>")
  47
  48 static const char* const valid_modargs[] = {
  49     "config",
  50     "sink",
  51     "appname",
  52     NULL,
  53 };
  54
  55 struct userdata {
  56     int lirc_fd;
  57     pa_io_event *io;
  58     struct lirc_config *config;
  59     char *sink_name;
  60     pa_module *module;
  61     float mute_toggle_save;
  62 };
  63
  64 static int lirc_in_use = 0;
  65
  66 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) {
  67     struct userdata *u = userdata;
  68     char *name = NULL, *code = NULL;
  69     assert(io);
  70     assert(u);
  71
  72     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  73         pa_log(__FILE__": lost connection to LIRC daemon.");
  74         goto fail;
  75     }
  76
  77     if (events & PA_IO_EVENT_INPUT) {
  78         char *c;
  79
  80         if (lirc_nextcode(&code) != 0 || !code) {
  81             pa_log(__FILE__": lirc_nextcode() failed.");
  82             goto fail;
  83         }
  84
  85         c = pa_xstrdup(code);
  86         c[strcspn(c, "\n\r")] = 0;
  87         pa_log_debug(__FILE__": raw IR code '%s'", c);
  88         pa_xfree(c);
  89
  90         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  91             enum { INVALID, UP, DOWN, MUTE, RESET, MUTE_TOGGLE } volchange = INVALID;
  92
  93             pa_log_info(__FILE__": translated IR code '%s'", name);
  94
  95             if (strcasecmp(name, "volume-up") == 0)
  96                 volchange = UP;
  97             else if (strcasecmp(name, "volume-down") == 0)
  98                 volchange = DOWN;
  99             else if (strcasecmp(name, "mute") == 0)
 100                 volchange = MUTE;
 101             else if (strcasecmp(name, "mute-toggle") == 0)
 102                 volchange = MUTE_TOGGLE;
 103             else if (strcasecmp(name, "reset") == 0)
 104                 volchange = RESET;
 105
 106             if (volchange == INVALID)
 107                 pa_log_warn(__FILE__": recieved unknown IR code '%s'", name);
 108             else {
 109                 pa_sink *s;
 110
 111                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
 112                     pa_log(__FILE__": failed to get sink '%s'", u->sink_name);
 113                 else {
 114                     pa_volume_t v = pa_cvolume_avg(pa_sink_get_volume(s, PA_MIXER_HARDWARE));
 115                     pa_cvolume cv;
 116 #define DELTA (PA_VOLUME_NORM/20)
 117
 118                     switch (volchange) {
 119                         case UP:
 120                             v += PA_VOLUME_NORM/20;
 121                             break;
 122
 123                         case DOWN:
 124                             if (v > DELTA)
 125                                 v -= DELTA;
 126                             else
 127                                 v = PA_VOLUME_MUTED;
 128
 129                             break;
 130
 131                         case MUTE:
 132                             v  = PA_VOLUME_MUTED;
 133                             break;
 134
 135                         case RESET:
 136                             v  = PA_VOLUME_NORM;
 137                             break;
 138
 139                         case MUTE_TOGGLE: {
 140
 141                             if (v > 0) {
 142                                 u->mute_toggle_save = v;
 143                                 v = PA_VOLUME_MUTED;
 144                             } else
 145                                 v = u->mute_toggle_save;
 146                         }
 147                         default:
 148                             ;
 149                     }
 150
 151                     pa_cvolume_set(&cv, PA_CHANNELS_MAX, v);
 152                     pa_sink_set_volume(s, PA_MIXER_HARDWARE, &cv);
 153                 }
 154             }
 155         }
 156     }
 157
 158     free(code);
 159
 160     return;
 161
 162 fail:
 163     u->module->core->mainloop->io_free(u->io);
 164     u->io = NULL;
 165
 166     pa_module_unload_request(u->module);
 167
 168     free(code);
 169 }
 170
 171 int pa__init(pa_core *c, pa_module*m) {
 172     pa_modargs *ma = NULL;
 173     struct userdata *u;
 174     assert(c && m);
 175
 176     if (lirc_in_use) {
 177         pa_log(__FILE__": module-lirc may no be loaded twice.");
 178         return -1;
 179     }
 180
 181     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 182         pa_log(__FILE__": Failed to parse module arguments");
 183         goto fail;
 184     }
 185
 186     m->userdata = u = pa_xmalloc(sizeof(struct userdata));
 187     u->module = m;
 188     u->io = NULL;
 189     u->config = NULL;
 190     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 191     u->lirc_fd = -1;
 192     u->mute_toggle_save = 0;
 193
 194     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "polypaudio"), 1)) < 0) {
 195         pa_log(__FILE__": lirc_init() failed.");
 196         goto fail;
 197     }
 198
 199     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 200         pa_log(__FILE__": lirc_readconfig() failed.");
 201         goto fail;
 202     }
 203
 204     u->io = c->mainloop->io_new(c->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 205
 206     lirc_in_use = 1;
 207
 208     pa_modargs_free(ma);
 209
 210     return 0;
 211
 212 fail:
 213
 214     if (ma)
 215         pa_modargs_free(ma);
 216
 217     pa__done(c, m);
 218     return -1;
 219 }
 220
 221 void pa__done(pa_core *c, pa_module*m) {
 222     struct userdata *u;
 223     assert(c);
 224     assert(m);
 225
 226     if (!(u = m->userdata))
 227         return;
 228
 229     if (u->io)
 230         m->core->mainloop->io_free(u->io);
 231
 232     if (u->config)
 233         lirc_freeconfig(u->config);
 234
 235     if (u->lirc_fd >= 0)
 236         lirc_deinit();
 237
 238     pa_xfree(u->sink_name);
 239     pa_xfree(u);
 240
 241     lirc_in_use = 0;
 242 }