input/appleir.c

   1 /*
   2  * Linux Apple IR Remote input interface
   3  *
   4  * Copyright (C) 2008 Benjamin Zores <ben at geexbox dot org>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer 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.
  12  *
  13  * MPlayer 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.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include "ar.h"
  26 #include "input.h"
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <fcntl.h>
  35 #include <errno.h>
  36
  37 #include <linux/types.h>
  38 #include <linux/input.h>
  39
  40 #include "mp_msg.h"
  41
  42 #define EVDEV_MAX_EVENTS 32
  43
  44 /* ripped from AppleIR driver */
  45 #define USB_VENDOR_APPLE          0x05ac
  46 #define USB_DEV_APPLE_IR          0x8240
  47 #define USB_DEV_APPLE_IR_2        0x8242
  48
  49 /* Apple IR Remote evdev mapping */
  50 #define APPLE_IR_MINUS            KEY_VOLUMEDOWN
  51 #define APPLE_IR_PLUS             KEY_VOLUMEUP
  52 #define APPLE_IR_MENU             KEY_MENU
  53 #define APPLE_IR_FORWARD          KEY_NEXTSONG
  54 #define APPLE_IR_PLAY             KEY_PLAYPAUSE
  55 #define APPLE_IR_BACKWARD         KEY_PREVIOUSSONG
  56
  57 static const struct {
  58   int linux_keycode;
  59   int value;
  60   int mp_keycode;
  61 } apple_ir_mapping[] = {
  62   { APPLE_IR_PLAY,              1,   AR_PLAY      },
  63   { APPLE_IR_PLAY,              2,   AR_PLAY_HOLD },
  64   { APPLE_IR_FORWARD,           1,   AR_NEXT      },
  65   { APPLE_IR_FORWARD,           2,   AR_NEXT_HOLD },
  66   { APPLE_IR_BACKWARD,          1,   AR_PREV      },
  67   { APPLE_IR_BACKWARD,          2,   AR_PREV_HOLD },
  68   { APPLE_IR_MENU,              1,   AR_MENU      },
  69   { APPLE_IR_MENU,              2,   AR_MENU_HOLD },
  70   { APPLE_IR_PLUS,              1,   AR_VUP       },
  71   { APPLE_IR_MINUS,             1,   AR_VDOWN     },
  72   { -1,                        -1,   -1           }
  73 };
  74
  75 int mp_input_appleir_init (char *dev)
  76 {
  77   int i, fd;
  78
  79   if (dev)
  80   {
  81     mp_tmsg (MSGT_INPUT, MSGL_V, "Initializing Apple IR on %s\n", dev);
  82     fd = open (dev, O_RDONLY | O_NONBLOCK);
  83     if (fd < 0)
  84     {
  85       mp_tmsg (MSGT_INPUT, MSGL_ERR,
  86               "Can't open Apple IR device: %s\n", strerror (errno));
  87       return -1;
  88     }
  89
  90     return fd;
  91   }
  92   else
  93   {
  94     /* look for a valid AppleIR device on system */
  95     for (i = 0; i < EVDEV_MAX_EVENTS; i++)
  96     {
  97       struct input_id id;
  98       char file[64];
  99
 100       sprintf (file, "/dev/input/event%d", i);
 101       fd = open (file, O_RDONLY | O_NONBLOCK);
 102       if (fd < 0)
 103         continue;
 104
 105       ioctl (fd, EVIOCGID, &id);
 106       if (id.bustype == BUS_USB &&
 107           id.vendor  == USB_VENDOR_APPLE &&
 108           (id.product == USB_DEV_APPLE_IR ||id.product == USB_DEV_APPLE_IR_2))
 109       {
 110         mp_tmsg (MSGT_INPUT, MSGL_V, "Detected Apple IR on %s\n", file);
 111         return fd;
 112       }
 113       close (fd);
 114     }
 115
 116     mp_tmsg (MSGT_INPUT, MSGL_ERR,
 117             "Can't open Apple IR device: %s\n", strerror (errno));
 118   }
 119
 120   return -1;
 121 }
 122
 123 int mp_input_appleir_read(void *ctx, int fd)
 124 {
 125   struct input_event ev;
 126   int i, r;
 127
 128   r = read (fd, &ev, sizeof (struct input_event));
 129   if (r <= 0 || r < sizeof (struct input_event))
 130     return MP_INPUT_NOTHING;
 131
 132   /* check for key press only */
 133   if (ev.type != EV_KEY)
 134     return MP_INPUT_NOTHING;
 135
 136   /* EvDev Key values:
 137    *  0: key release
 138    *  1: key press
 139    *  2: key auto-repeat
 140    */
 141   if (ev.value == 0)
 142     return MP_INPUT_NOTHING;
 143
 144   /* find Linux evdev -> MPlayer keycode mapping */
 145   for (i = 0; apple_ir_mapping[i].linux_keycode != -1; i++)
 146     if (apple_ir_mapping[i].linux_keycode == ev.code &&
 147         apple_ir_mapping[i].value == ev.value)
 148       return apple_ir_mapping[i].mp_keycode;
 149
 150   return MP_INPUT_NOTHING;
 151 }