Add disc drives probing for services discovery on OS/2

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit 10f17cdeeaaca3c6a6df37ef010d8498bfc173e5)
Signed-off-by: KO Myung-Hun <komh@chollian.net>
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

modules/services_discovery/Modules.am

@@ -42,6 +42,14 @@ if HAVE_WIN32
 libvlc_LTLIBRARIES += libwindrive_plugin.la
 endif
 
+libos2drive_plugin_la_SOURCES = os2drive.c
+libos2drive_plugin_la_CFLAGS = $(AM_CFLAGS)
+libos2drive_plugin_la_LIBADD = $(AM_LIBADD)
+libos2drive_plugin_la_DEPENDENCIES =
+if HAVE_OS2
+libvlc_LTLIBRARIES += libos2drive_plugin.la
+endif
+
 EXTRA_LTLIBRARIES += \
 	libudev_plugin.la
 libvlc_LTLIBRARIES += \

modules/services_discovery/os2drive.c

+/**
+ * @file os2drive.c
+ * @brief List of disc drives for VLC media player for OS/2
+ */
+/*****************************************************************************
+ * Copyright (C) 2012 KO Myung-Hun <komh@chollian.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <vlc_common.h>
+#include <vlc_services_discovery.h>
+#include <vlc_plugin.h>
+
+#define IOCTL_CDROMDISK2        0x82
+#define CDROMDISK2_DRIVELETTERS 0x60
+
+static int Open (vlc_object_t *);
+
+VLC_SD_PROBE_HELPER("disc", "Discs", SD_CAT_DEVICES)
+
+/*
+ * Module descriptor
+ */
+vlc_module_begin ()
+    add_submodule ()
+    set_shortname (N_("Discs"))
+    set_description (N_("Discs"))
+    set_category (CAT_PLAYLIST)
+    set_subcategory (SUBCAT_PLAYLIST_SD)
+    set_capability ("services_discovery", 0)
+    set_callbacks (Open, NULL)
+    add_shortcut ("disc")
+
+    VLC_SD_PROBE_SUBMODULE
+
+vlc_module_end ()
+
+/**
+ * Probes and initializes.
+ */
+static int Open (vlc_object_t *obj)
+{
+    services_discovery_t *sd = (services_discovery_t *)obj;
+
+    HFILE hcd2;
+    ULONG ulAction;
+    ULONG ulParamLen;
+    ULONG ulData;
+    ULONG ulDataLen;
+    ULONG rc;
+
+    if (DosOpen ((PSZ)"CD-ROM2$", (PHFILE)&hcd2, &ulAction, 0, FILE_NORMAL,
+                 OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
+                 OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, NULL))
+        return VLC_EGENERIC;
+
+    rc = DosDevIOCtl (hcd2, IOCTL_CDROMDISK2, CDROMDISK2_DRIVELETTERS,
+                      NULL, 0, &ulParamLen, &ulData, sizeof(ulData), &ulDataLen);
+    if (!rc)
+    {
+        char mrl[] = "file:///A:/", name[] = "A:";
+
+        int count = LOUSHORT(ulData);
+        int drive = HIUSHORT(ulData);
+
+        input_item_t *item;
+        char          letter;
+
+        for (; count; --count, ++drive)
+        {
+            letter = 'A' + drive;
+
+            mrl[8] = name[0] = letter;
+            item = input_item_NewWithType (mrl, name, 0, NULL, 0, -1, ITEM_TYPE_DISC);
+            msg_Dbg (sd, "adding %s (%s)", mrl, name);
+            if (item == NULL)
+                break;
+
+            services_discovery_AddItem (sd, item, _("Local drives"));
+        }
+    }
+
+    DosClose (hcd2);
+
+    return rc ? VLC_EGENERIC : VLC_SUCCESS;
+}