4 * LIRC input device support
6 * Copyright (c) 2009 wahrhaft
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <sys/types.h>
20 #include <sys/ioctl.h>
31 #include <glib/giochannel.h>
34 #include <lirc/lirc_client.h>
39 #include "maple/maple.h"
41 typedef struct input_lirc {
42 struct input_driver driver;
48 #define MAX_KEYSYMS 65536
49 static GData *keysyms;
50 static uint16_t last_keycode;
51 static GQuark keysym_by_keycode_result;
54 static uint16_t input_lirc_resolve_keysym( input_driver_t dev, const gchar *str );
55 static gchar *input_lirc_keysym_for_keycode( input_driver_t dev, uint16_t keycode );
56 static void get_keysym_by_keycode(GQuark key_id, gpointer data, gpointer user_data);
57 static gboolean input_lirc_callback( GIOChannel *source, GIOCondition condition, gpointer data );
59 input_driver_t system_lirc_driver;
61 static gboolean input_lirc_init()
63 input_lirc_t system_lirc_driver = g_malloc0(sizeof(struct input_lirc));
64 strcpy(system_lirc_driver->name, "LIRC");
65 system_lirc_driver->driver.id = system_lirc_driver->name;
66 system_lirc_driver->driver.resolve_keysym = input_lirc_resolve_keysym;
67 system_lirc_driver->driver.get_keysym_for_keycode = input_lirc_keysym_for_keycode;
68 system_lirc_driver->driver.destroy = NULL;
70 system_lirc_driver->fd = lirc_init("lxdream", 1);
71 if (system_lirc_driver->fd == -1) {
72 WARN("Could not initialize LIRC. LIRC hotkeys will be disabled.");
76 system_lirc_driver->channel = g_io_channel_unix_new(system_lirc_driver->fd);
77 g_io_channel_set_flags(system_lirc_driver->channel, G_IO_FLAG_IS_READABLE | G_IO_FLAG_NONBLOCK, NULL);
78 g_io_add_watch(system_lirc_driver->channel, G_IO_IN|G_IO_ERR|G_IO_HUP, input_lirc_callback, system_lirc_driver);
79 g_datalist_init(&keysyms);
80 input_register_device((input_driver_t)system_lirc_driver, MAX_KEYSYMS - 1);
84 void input_lirc_shutdown(void)
86 input_lirc_t lirc = (input_lirc_t)system_lirc_driver;
87 g_io_channel_shutdown(lirc->channel, FALSE, NULL );
88 g_io_channel_unref(lirc->channel);
90 g_free(system_lirc_driver);
93 static uint16_t input_lirc_resolve_keysym( input_driver_t dev, const gchar *str )
95 //LIRC uses keysyms but no keycodes. To generate a keycode, we'll just make them up as we go.
96 //As long as we store keysyms instead of keycodes in any config files, this should be fine.
99 keycode = (uint16_t)GPOINTER_TO_INT(g_datalist_get_data(&keysyms, str));
102 //this key is not in the list yet, so make a new keycode for it
103 g_datalist_set_data(&keysyms, str, GINT_TO_POINTER(++last_keycode));
111 static gchar *input_lirc_keysym_for_keycode( input_driver_t dev, uint16_t keycode )
113 //This won't work if you send in keycodes that haven't been fired by the callback
114 //or looked up using resolve_keysym yet. This shouldn't be a problem, since these
115 //two functions are the only way to get a keycode in the first place.
117 if (keycode <= last_keycode) {
119 keysym_by_keycode_result = 0;
120 g_datalist_foreach(&keysyms, get_keysym_by_keycode, GINT_TO_POINTER(keycode));
121 return g_strdup(g_quark_to_string(keysym_by_keycode_result));
127 static void get_keysym_by_keycode(GQuark key_id, gpointer data, gpointer user_data)
129 if (data == user_data)
130 keysym_by_keycode_result = key_id;
133 static gboolean input_lirc_callback( GIOChannel *source, GIOCondition condition, gpointer data )
138 input_lirc_t lirc = (input_lirc_t)data;
140 if (condition & G_IO_IN)
142 //loop through all queued commands
143 while ((ret = lirc_nextcode(&code)) == 0 && code != NULL)
145 //code contains id, repeat count, and keysym separated by spaces
146 gchar **code_split = g_strsplit(code, " ", 4);
148 //eliminate repeats by only accepting the first instance of a keysym
149 if (atoi(code_split[1]) == 0)
151 input_event_keydown((input_driver_t)lirc, input_lirc_resolve_keysym((input_driver_t)lirc, code_split[2]), MAX_PRESSURE);
154 g_strfreev(code_split);
161 DEFINE_PLUGIN( PLUGIN_INPUT_DRIVER, "lirc", input_lirc_init );
.