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 #include "help_mp.h"
  42
  43 #define EVDEV_MAX_EVENTS 32
  44
  45 /* ripped from AppleIR driver */
  46 #define USB_VENDOR_APPLE          0x05ac
  47 #define USB_DEV_APPLE_IR          0x8240
  48 #define USB_DEV_APPLE_IR_2        0x8242
  49
  50 /* Apple IR Remote evdev mapping */
  51 #define APPLE_IR_MINUS            KEY_VOLUMEDOWN
  52 #define APPLE_IR_PLUS             KEY_VOLUMEUP
  53 #define APPLE_IR_MENU             KEY_MENU
  54 #define APPLE_IR_FORWARD          KEY_NEXTSONG
  55 #define APPLE_IR_PLAY             KEY_PLAYPAUSE
  56 #define APPLE_IR_BACKWARD         KEY_PREVIOUSSONG
  57
  58 static const struct {
  59   int linux_keycode;
  60   int value;
  61   int mp_keycode;
  62 } apple_ir_mapping[] = {
  63   { APPLE_IR_PLAY,              1,   AR_PLAY      },
  64   { APPLE_IR_PLAY,              2,   AR_PLAY_HOLD },
  65   { APPLE_IR_FORWARD,           1,   AR_NEXT      },
  66   { APPLE_IR_FORWARD,           2,   AR_NEXT_HOLD },
  67   { APPLE_IR_BACKWARD,          1,   AR_PREV      },
  68   { APPLE_IR_BACKWARD,          2,   AR_PREV_HOLD },
  69   { APPLE_IR_MENU,              1,   AR_MENU      },
  70   { APPLE_IR_MENU,              2,   AR_MENU_HOLD },
  71   { APPLE_IR_PLUS,              1,   AR_VUP       },
  72   { APPLE_IR_MINUS,             1,   AR_VDOWN     },
  73   { -1,                        -1,   -1           }
  74 };
  75
  76 int mp_input_appleir_init (char *dev)
  77 {
  78   int i, fd;
  79
  80   if (dev)
  81   {
  82     mp_msg (MSGT_INPUT, MSGL_V, MSGTR_INPUT_APPLE_IR_Init, dev);
  83     fd = open (dev, O_RDONLY | O_NONBLOCK);
  84     if (fd < 0)
  85     {
  86       mp_msg (MSGT_INPUT, MSGL_ERR,
  87               MSGTR_INPUT_APPLE_IR_CantOpen, strerror (errno));
  88       return -1;
  89     }
  90
  91     return fd;
  92   }
  93   else
  94   {
  95     /* look for a valid AppleIR device on system */
  96     for (i = 0; i < EVDEV_MAX_EVENTS; i++)
  97     {
  98       struct input_id id;
  99       char file[64];
 100
 101       sprintf (file, "/dev/input/event%d", i);
 102       fd = open (file, O_RDONLY | O_NONBLOCK);
 103       if (fd < 0)
 104         continue;
 105
 106       ioctl (fd, EVIOCGID, &id);
 107       if (id.bustype == BUS_USB &&
 108           id.vendor  == USB_VENDOR_APPLE &&
 109           (id.product == USB_DEV_APPLE_IR ||id.product == USB_DEV_APPLE_IR_2))
 110       {
 111         mp_msg (MSGT_INPUT, MSGL_V, MSGTR_INPUT_APPLE_IR_Detect, file);
 112         return fd;
 113       }
 114       close (fd);
 115     }
 116
 117     mp_msg (MSGT_INPUT, MSGL_ERR,
 118             MSGTR_INPUT_APPLE_IR_CantOpen, strerror (errno));
 119   }
 120
 121   return -1;
 122 }
 123
 124 int mp_input_appleir_read (int fd)
 125 {
 126   struct input_event ev;
 127   int i, r;
 128
 129   r = read (fd, &ev, sizeof (struct input_event));
 130   if (r <= 0 || r < sizeof (struct input_event))
 131     return MP_INPUT_NOTHING;
 132
 133   /* check for key press only */
 134   if (ev.type != EV_KEY)
 135     return MP_INPUT_NOTHING;
 136
 137   /* EvDev Key values:
 138    *  0: key release
 139    *  1: key press
 140    *  2: key auto-repeat
 141    */
 142   if (ev.value == 0)
 143     return MP_INPUT_NOTHING;
 144
 145   /* find Linux evdev -> MPlayer keycode mapping */
 146   for (i = 0; apple_ir_mapping[i].linux_keycode != -1; i++)
 147     if (apple_ir_mapping[i].linux_keycode == ev.code &&
 148         apple_ir_mapping[i].value == ev.value)
 149       return apple_ir_mapping[i].mp_keycode;
 150
 151   return MP_INPUT_NOTHING;
 152 }