Add support for AppleIR Remote as an input under Linux systems.

This requires Linux 2.6 with evdev and appleir drivers.
The keymapping is done to mimics the one that was done for MacOSX.

WARNING: Most distributions do not seems to bother and only let root
access to the device. Modify udev rules accordingly if you want regular
user to be able to use the remote.



git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26795 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 151 insertions, 0 deletions

diff --git a/input/appleir.c b/input/appleir.c
new file mode 100644
index 0000000000..a3ec66e8cb
--- /dev/null
+++ b/input/appleir.c
@@ -0,0 +1,151 @@
+/*
+ * Linux Apple IR Remote input interface
+ *
+ * Copyright (C) 2008 Benjamin Zores <ben at geexbox dot org>
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include "ar.h"
+#include "input.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <linux/input.h>
+
+#include "mp_msg.h"
+#include "help_mp.h"
+
+#define EVDEV_MAX_EVENTS 32
+
+/* ripped from AppleIR driver */
+#define USB_VENDOR_APPLE          0x05ac
+#define USB_DEV_APPLE_IR          0x8240
+#define USB_DEV_APPLE_IR_2        0x8242
+
+/* Apple IR Remote evdev mapping */
+#define APPLE_IR_MINUS            KEY_VOLUMEDOWN
+#define APPLE_IR_PLUS             KEY_VOLUMEUP
+#define APPLE_IR_MENU             KEY_MENU
+#define APPLE_IR_FORWARD          KEY_NEXTSONG
+#define APPLE_IR_PLAY             KEY_PLAYPAUSE
+#define APPLE_IR_BACKWARD         KEY_PREVIOUSSONG
+
+static const struct {
+  int linux_keycode;
+  int value;
+  int mp_keycode;
+} apple_ir_mapping[] = {
+  { APPLE_IR_PLAY,              1,   AR_PLAY      },
+  { APPLE_IR_PLAY,              2,   AR_PLAY_HOLD },
+  { APPLE_IR_FORWARD,           1,   AR_NEXT      },
+  { APPLE_IR_FORWARD,           2,   AR_NEXT_HOLD },
+  { APPLE_IR_BACKWARD,          1,   AR_PREV      },
+  { APPLE_IR_BACKWARD,          2,   AR_PREV_HOLD },
+  { APPLE_IR_MENU,              1,   AR_MENU      },
+  { APPLE_IR_MENU,              2,   AR_MENU_HOLD },
+  { APPLE_IR_PLUS,              1,   AR_VUP       },  
+  { APPLE_IR_MINUS,             1,   AR_VDOWN     },
+  { -1,                        -1,   -1           }
+};
+
+int mp_input_appleir_init (char *dev)
+{
+  int i, fd;
+
+  if (dev)
+  {
+    mp_msg (MSGT_INPUT, MSGL_V, MSGTR_INPUT_APPLE_IR_Init, dev);
+    fd = open (dev, O_RDONLY | O_NONBLOCK);
+    if (fd < 0)
+    {
+      mp_msg (MSGT_INPUT, MSGL_ERR,
+              MSGTR_INPUT_APPLE_IR_CantOpen, strerror (errno));
+      return -1;
+    }
+
+    return fd;
+  }
+  else
+  {
+    /* look for a valid AppleIR device on system */
+    for (i = 0; i < EVDEV_MAX_EVENTS; i++)
+    {
+      struct input_id id;
+      char file[64];
+
+      sprintf (file, "/dev/input/event%d", i);
+      fd = open (file, O_RDONLY | O_NONBLOCK);
+      if (fd < 0)
+        continue;
+      
+      ioctl (fd, EVIOCGID, &id);
+      if (id.bustype == BUS_USB &&
+          id.vendor  == USB_VENDOR_APPLE &&
+          (id.product == USB_DEV_APPLE_IR ||id.product == USB_DEV_APPLE_IR_2))
+      {
+        mp_msg (MSGT_INPUT, MSGL_V, MSGTR_INPUT_APPLE_IR_Detect, file);
+        return fd;
+      }
+      close (fd);
+    }
+
+    mp_msg (MSGT_INPUT, MSGL_ERR,
+            MSGTR_INPUT_APPLE_IR_CantOpen, strerror (errno));
+  }
+
+  return -1;
+}
+
+int mp_input_appleir_read (int fd)
+{
+  struct input_event ev;
+  int i, r;
+
+  r = read (fd, &ev, sizeof (struct input_event));
+  if (r <= 0 || r < sizeof (struct input_event))
+    return MP_INPUT_NOTHING;
+
+  /* check for key press only */
+  if (ev.type != EV_KEY)
+    return MP_INPUT_NOTHING;
+
+  /* EvDev Key values:
+   *  0: key release
+   *  1: key press
+   *  2: key auto-repeat
+   */
+  if (ev.value == 0)
+    return MP_INPUT_NOTHING;
+
+  /* find Linux evdev -> MPlayer keycode mapping */
+  for (i = 0; apple_ir_mapping[i].linux_keycode != -1; i++)
+    if (apple_ir_mapping[i].linux_keycode == ev.code &&
+        apple_ir_mapping[i].value == ev.value)
+      return apple_ir_mapping[i].mp_keycode;
+  
+  return MP_INPUT_NOTHING;
+}