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 // keycodes.h defines would conflict with linux/input.h ones
  43 #define AR_DEFINES_ONLY
  44 #include "keycodes.h"
  45
  46 #define EVDEV_MAX_EVENTS 32
  47
  48 /* ripped from AppleIR driver */
  49 #define USB_VENDOR_APPLE          0x05ac
  50 #define USB_DEV_APPLE_IR          0x8240
  51 #define USB_DEV_APPLE_IR_2        0x8242
  52
  53 /* Apple IR Remote evdev mapping */
  54 #define APPLE_IR_MINUS            KEY_VOLUMEDOWN
  55 #define APPLE_IR_PLUS             KEY_VOLUMEUP
  56 #define APPLE_IR_MENU             KEY_MENU
  57 #define APPLE_IR_FORWARD          KEY_NEXTSONG
  58 #define APPLE_IR_PLAY             KEY_PLAYPAUSE
  59 #define APPLE_IR_BACKWARD         KEY_PREVIOUSSONG
  60
  61 static const struct {
  62   int linux_keycode;
  63   int value;
  64   int mp_keycode;
  65 } apple_ir_mapping[] = {
  66   { APPLE_IR_PLAY,              1,   AR_PLAY      },
  67   { APPLE_IR_PLAY,              2,   AR_PLAY_HOLD },
  68   { APPLE_IR_FORWARD,           1,   AR_NEXT      },
  69   { APPLE_IR_FORWARD,           2,   AR_NEXT_HOLD },
  70   { APPLE_IR_BACKWARD,          1,   AR_PREV      },
  71   { APPLE_IR_BACKWARD,          2,   AR_PREV_HOLD },
  72   { APPLE_IR_MENU,              1,   AR_MENU      },
  73   { APPLE_IR_MENU,              2,   AR_MENU_HOLD },
  74   { APPLE_IR_PLUS,              1,   AR_VUP       },
  75   { APPLE_IR_MINUS,             1,   AR_VDOWN     },
  76   { -1,                        -1,   -1           }
  77 };
  78
  79 int mp_input_appleir_init (char *dev)
  80 {
  81   int i, fd;
  82
  83   if (dev)
  84   {
  85     mp_tmsg (MSGT_INPUT, MSGL_V, "Initializing Apple IR on %s\n", dev);
  86     fd = open (dev, O_RDONLY | O_NONBLOCK);
  87     if (fd < 0)
  88     {
  89       mp_tmsg (MSGT_INPUT, MSGL_ERR,
  90               "Can't open Apple IR device: %s\n", strerror (errno));
  91       return -1;
  92     }
  93
  94     return fd;
  95   }
  96   else
  97   {
  98     /* look for a valid AppleIR device on system */
  99     for (i = 0; i < EVDEV_MAX_EVENTS; i++)
 100     {
 101       struct input_id id;
 102       char file[64];
 103
 104       sprintf (file, "/dev/input/event%d", i);
 105       fd = open (file, O_RDONLY | O_NONBLOCK);
 106       if (fd < 0)
 107         continue;
 108
 109       ioctl (fd, EVIOCGID, &id);
 110       if (id.bustype == BUS_USB &&
 111           id.vendor  == USB_VENDOR_APPLE &&
 112           (id.product == USB_DEV_APPLE_IR ||id.product == USB_DEV_APPLE_IR_2))
 113       {
 114         mp_tmsg (MSGT_INPUT, MSGL_V, "Detected Apple IR on %s\n", file);
 115         return fd;
 116       }
 117       close (fd);
 118     }
 119
 120     mp_tmsg (MSGT_INPUT, MSGL_ERR,
 121             "Can't open Apple IR device: %s\n", strerror (errno));
 122   }
 123
 124   return -1;
 125 }
 126
 127 int mp_input_appleir_read(void *ctx, int fd)
 128 {
 129   struct input_event ev;
 130   int i, r;
 131
 132   r = read (fd, &ev, sizeof (struct input_event));
 133   if (r <= 0 || r < sizeof (struct input_event))
 134     return MP_INPUT_NOTHING;
 135
 136   /* check for key press only */
 137   if (ev.type != EV_KEY)
 138     return MP_INPUT_NOTHING;
 139
 140   /* EvDev Key values:
 141    *  0: key release
 142    *  1: key press
 143    *  2: key auto-repeat
 144    */
 145   if (ev.value == 0)
 146     return MP_INPUT_NOTHING;
 147
 148   /* find Linux evdev -> MPlayer keycode mapping */
 149   for (i = 0; apple_ir_mapping[i].linux_keycode != -1; i++)
 150     if (apple_ir_mapping[i].linux_keycode == ev.code &&
 151         apple_ir_mapping[i].value == ev.value)
 152       return apple_ir_mapping[i].mp_keycode;
 153
 154   return MP_INPUT_NOTHING;
 155 }