modules/control/win_msg.c

   1 /*****************************************************************************
   2  * ntservice.c: Windows NT/2K/XP service interface
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004, 2010 VLC authors and VideoLAN
   5  *
   6  * Authors: Samuel Hocevar <sam@zoy.org>
   7  *          Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
  29 #include <vlc_common.h>
  30 #include <vlc_plugin.h>
  31 #include <vlc_interface.h>
  32 #include <vlc_playlist.h>
  33 #include <vlc_input.h>
  34 #include <vlc_url.h> // FIXME: move URL generation to calling process
  35
  36 #include <windows.h>
  37
  38 struct intf_sys_t
  39 {
  40     HWND window;
  41     HANDLE ready;
  42     vlc_thread_t thread;
  43 };
  44
  45 /* Must be same as in src/win32/specific.c */
  46 typedef struct
  47 {
  48     int argc;
  49     int enqueue;
  50     char data[];
  51 } vlc_ipc_data_t;
  52
  53 static LRESULT CALLBACK WMCOPYWNDPROC(HWND hwnd, UINT uMsg,
  54                                       WPARAM wParam, LPARAM lParam)
  55 {
  56     if( uMsg == WM_QUIT  )
  57     {
  58         PostQuitMessage( 0 );
  59     }
  60     else if( uMsg == WM_COPYDATA )
  61     {
  62         COPYDATASTRUCT *pwm_data = (COPYDATASTRUCT*)lParam;
  63
  64         intf_thread_t *intf = (intf_thread_t *)(uintptr_t)
  65             GetWindowLongPtr( hwnd, GWLP_USERDATA );
  66         if( intf == NULL )
  67             return 0; /* XXX: is this even possible? */
  68
  69         /* Add files to the playlist */
  70         if( pwm_data->lpData )
  71         {
  72             char **ppsz_argv;
  73             vlc_ipc_data_t *p_data = (vlc_ipc_data_t *)pwm_data->lpData;
  74             size_t i_data = 0;
  75             int i_argc = p_data->argc, i_opt, i_options;
  76
  77             ppsz_argv = vlc_alloc( i_argc, sizeof(char *) );
  78             for( i_opt = 0; i_opt < i_argc; i_opt++ )
  79             {
  80                 ppsz_argv[i_opt] = p_data->data + i_data + sizeof(size_t);
  81                 i_data += sizeof(size_t) + *((size_t *)(p_data->data + i_data));
  82             }
  83
  84             for( i_opt = 0; i_opt < i_argc; i_opt++ )
  85             {
  86                 i_options = 0;
  87
  88                 /* Count the input options */
  89                 while( i_opt + i_options + 1 < i_argc &&
  90                         *ppsz_argv[ i_opt + i_options + 1 ] == ':' )
  91                 {
  92                     i_options++;
  93                 }
  94
  95 #warning URI conversion must be done in calling process instead!
  96                 /* FIXME: This breaks relative paths if calling vlc.exe is
  97                  * started from a different working directory. */
  98                 char *psz_URI = NULL;
  99                 if( strstr( ppsz_argv[i_opt], "://" ) == NULL )
 100                     psz_URI = vlc_path2uri( ppsz_argv[i_opt], NULL );
 101                 playlist_AddExt( pl_Get(intf),
 102                         (psz_URI != NULL) ? psz_URI : ppsz_argv[i_opt],
 103                         NULL, (i_opt == 0 && !p_data->enqueue),
 104                         i_options,
 105                         (char const **)( i_options ? &ppsz_argv[i_opt+1] : NULL ),
 106                         VLC_INPUT_OPTION_TRUSTED,
 107                         true );
 108
 109                 i_opt += i_options;
 110                 free( psz_URI );
 111             }
 112
 113             free( ppsz_argv );
 114         }
 115     }
 116
 117     return DefWindowProc( hwnd, uMsg, wParam, lParam );
 118 }
 119
 120 static void *HelperThread(void *data)
 121 {
 122     intf_thread_t *intf = data;
 123     intf_sys_t *sys = intf->p_sys;
 124
 125     HWND ipcwindow =
 126         CreateWindow(L"STATIC",                      /* name of window class */
 127                   L"VLC ipc " TEXT(VERSION),        /* window title bar text */
 128                   0,                                         /* window style */
 129                   0,                                 /* default X coordinate */
 130                   0,                                 /* default Y coordinate */
 131                   0,                                         /* window width */
 132                   0,                                        /* window height */
 133                   NULL,                                  /* no parent window */
 134                   NULL,                            /* no menu in this window */
 135                   GetModuleHandle(NULL),  /* handle of this program instance */
 136                   NULL) ;                               /* sent to WM_CREATE */
 137
 138     SetWindowLongPtr(ipcwindow, GWLP_WNDPROC, (LRESULT)WMCOPYWNDPROC);
 139     SetWindowLongPtr(ipcwindow, GWLP_USERDATA, (uintptr_t)data);
 140
 141     sys->window = ipcwindow;
 142     /* Signal the creation of the thread and events queue */
 143     SetEvent(sys->ready);
 144
 145     MSG message;
 146     while (GetMessage(&message, NULL, 0, 0))
 147     {
 148         TranslateMessage(&message);
 149         DispatchMessage(&message);
 150     }
 151
 152     return NULL;
 153 }
 154
 155 static int Open(vlc_object_t *obj)
 156 {
 157     intf_thread_t *intf = (intf_thread_t *)obj;
 158     intf_sys_t *sys = malloc(sizeof (*sys));
 159     if (unlikely(sys == NULL))
 160         return VLC_ENOMEM;
 161
 162     intf->p_sys = sys;
 163
 164     /* Run the helper thread */
 165     sys->ready = CreateEvent(NULL, FALSE, FALSE, NULL);
 166
 167     if (vlc_clone(&sys->thread, HelperThread, intf, VLC_THREAD_PRIORITY_LOW))
 168     {
 169         free(sys);
 170         msg_Err(intf, "one instance mode DISABLED "
 171                  "(IPC helper thread couldn't be created)");
 172         return VLC_ENOMEM;
 173     }
 174
 175     WaitForSingleObject(sys->ready, INFINITE);
 176     CloseHandle(sys->ready);
 177
 178     return VLC_SUCCESS;
 179 }
 180
 181 static void Close(vlc_object_t *obj)
 182 {
 183     intf_thread_t *intf = (intf_thread_t *)obj;
 184     intf_sys_t *sys = intf->p_sys;
 185
 186     SendMessage(sys->window, WM_QUIT, 0, 0);
 187     vlc_join(sys->thread, NULL);
 188     free(sys);
 189 }
 190
 191 vlc_module_begin()
 192     set_shortname(N_("WinMsg"))
 193     set_description(N_("Windows messages interface"))
 194     set_category(CAT_INTERFACE)
 195     set_subcategory(SUBCAT_INTERFACE_CONTROL)
 196     set_capability("interface", 0)
 197     set_callbacks(Open, Close)
 198 vlc_module_end()