git.sesse.net Git - vlc/blob - src/win32/specific.c

   1 /*****************************************************************************
   2  * specific.c: Win32 specific initilization
   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 it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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 UNICODE
  29 #include <vlc_common.h>
  30 #include "../libvlc.h"
  31 #include <vlc_playlist.h>
  32 #include <vlc_url.h>
  33
  34 #include "../config/vlc_getopt.h"
  35
  36 #if !defined( UNDER_CE )
  37 #   include  <mmsystem.h>
  38 #endif
  39
  40 #include <winsock.h>
  41
  42 /*****************************************************************************
  43  * system_Init: initialize winsock and misc other things.
  44  *****************************************************************************/
  45 void system_Init( void )
  46 {
  47     WSADATA Data;
  48
  49 #if !defined( UNDER_CE )
  50     timeBeginPeriod(5);
  51 #endif
  52
  53     /* WinSock Library Init. */
  54     if( !WSAStartup( MAKEWORD( 2, 2 ), &Data ) )
  55     {
  56         /* Aah, pretty useless check, we should always have Winsock 2.2
  57          * since it appeared in Win98. */
  58         if( LOBYTE( Data.wVersion ) != 2 || HIBYTE( Data.wVersion ) != 2 )
  59             /* We could not find a suitable WinSock DLL. */
  60             WSACleanup( );
  61         else
  62             /* Everything went ok. */
  63             return;
  64     }
  65
  66     /* Let's try with WinSock 1.1 */
  67     if( !WSAStartup( MAKEWORD( 1, 1 ), &Data ) )
  68     {
  69         /* Confirm that the WinSock DLL supports 1.1.*/
  70         if( LOBYTE( Data.wVersion ) != 1 || HIBYTE( Data.wVersion ) != 1 )
  71             /* We could not find a suitable WinSock DLL. */
  72             WSACleanup( );
  73         else
  74             /* Everything went ok. */
  75             return;
  76     }
  77
  78     fprintf( stderr, "error: can't initialize WinSocks\n" );
  79 }
  80
  81 /*****************************************************************************
  82  * system_Configure: check for system specific configuration options.
  83  *****************************************************************************/
  84 static unsigned __stdcall IPCHelperThread( void * );
  85 LRESULT CALLBACK WMCOPYWNDPROC( HWND, UINT, WPARAM, LPARAM );
  86 static vlc_object_t *p_helper = NULL;
  87 static unsigned long hIPCHelper;
  88 static HANDLE hIPCHelperReady;
  89
  90 typedef struct
  91 {
  92     int argc;
  93     int enqueue;
  94     char data[];
  95 } vlc_ipc_data_t;
  96
  97 void system_Configure( libvlc_int_t *p_this, int i_argc, const char *const ppsz_argv[] )
  98 {
  99 #if !defined( UNDER_CE )
 100     /* Raise default priority of the current process */
 101 #ifndef ABOVE_NORMAL_PRIORITY_CLASS
 102 #   define ABOVE_NORMAL_PRIORITY_CLASS 0x00008000
 103 #endif
 104     if( var_InheritBool( p_this, "high-priority" ) )
 105     {
 106         if( SetPriorityClass( GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS )
 107              || SetPriorityClass( GetCurrentProcess(), HIGH_PRIORITY_CLASS ) )
 108         {
 109             msg_Dbg( p_this, "raised process priority" );
 110         }
 111         else
 112         {
 113             msg_Dbg( p_this, "could not raise process priority" );
 114         }
 115     }
 116
 117     if( var_InheritBool( p_this, "one-instance" )
 118      || ( var_InheritBool( p_this, "one-instance-when-started-from-file" )
 119        && var_InheritBool( p_this, "started-from-file" ) ) )
 120     {
 121         HANDLE hmutex;
 122
 123         msg_Info( p_this, "one instance mode ENABLED");
 124
 125         /* Use a named mutex to check if another instance is already running */
 126         if( !( hmutex = CreateMutex( 0, TRUE, L"VLC ipc "VERSION ) ) )
 127         {
 128             /* Failed for some reason. Just ignore the option and go on as
 129              * normal. */
 130             msg_Err( p_this, "one instance mode DISABLED "
 131                      "(mutex couldn't be created)" );
 132             return;
 133         }
 134
 135         if( GetLastError() != ERROR_ALREADY_EXISTS )
 136         {
 137             /* We are the 1st instance. */
 138             p_helper =
 139                 vlc_custom_create( p_this, sizeof(*p_helper), "ipc helper" );
 140
 141             /* Run the helper thread */
 142             hIPCHelperReady = CreateEvent( NULL, FALSE, FALSE, NULL );
 143             hIPCHelper = _beginthreadex( NULL, 0, IPCHelperThread, p_helper,
 144                                          0, NULL );
 145             if( hIPCHelper )
 146                 WaitForSingleObject( hIPCHelperReady, INFINITE );
 147             else
 148             {
 149                 msg_Err( p_this, "one instance mode DISABLED "
 150                          "(IPC helper thread couldn't be created)" );
 151                 vlc_object_release (p_helper);
 152                 p_helper = NULL;
 153             }
 154             CloseHandle( hIPCHelperReady );
 155
 156             /* Initialization done.
 157              * Release the mutex to unblock other instances */
 158             ReleaseMutex( hmutex );
 159         }
 160         else
 161         {
 162             /* Another instance is running */
 163
 164             HWND ipcwindow;
 165
 166             /* Wait until the 1st instance is initialized */
 167             WaitForSingleObject( hmutex, INFINITE );
 168
 169             /* Locate the window created by the IPC helper thread of the
 170              * 1st instance */
 171             if( !( ipcwindow = FindWindow( 0, L"VLC ipc "VERSION ) ) )
 172             {
 173                 msg_Err( p_this, "one instance mode DISABLED "
 174                          "(couldn't find 1st instance of program)" );
 175                 ReleaseMutex( hmutex );
 176                 return;
 177             }
 178
 179             /* We assume that the remaining parameters are filenames
 180              * and their input options */
 181             if( i_argc > 0 )
 182             {
 183                 COPYDATASTRUCT wm_data;
 184                 int i_opt;
 185                 vlc_ipc_data_t *p_data;
 186                 size_t i_data = sizeof (*p_data);
 187
 188                 for( i_opt = 0; i_opt < i_argc; i_opt++ )
 189                 {
 190                     i_data += sizeof (size_t);
 191                     i_data += strlen( ppsz_argv[ i_opt ] ) + 1;
 192                 }
 193
 194                 p_data = malloc( i_data );
 195                 p_data->argc = i_argc;
 196                 p_data->enqueue = var_InheritBool( p_this, "playlist-enqueue" );
 197                 i_data = 0;
 198                 for( i_opt = 0; i_opt < i_argc; i_opt++ )
 199                 {
 200                     size_t i_len = strlen( ppsz_argv[ i_opt ] ) + 1;
 201                     /* Windows will never switch to an architecture
 202                      * with stronger alignment requirements, right. */
 203                     *((size_t *)(p_data->data + i_data)) = i_len;
 204                     i_data += sizeof (size_t);
 205                     memcpy( &p_data->data[i_data], ppsz_argv[ i_opt ], i_len );
 206                     i_data += i_len;
 207                 }
 208                 i_data += sizeof (*p_data);
 209
 210                 /* Send our playlist items to the 1st instance */
 211                 wm_data.dwData = 0;
 212                 wm_data.cbData = i_data;
 213                 wm_data.lpData = p_data;
 214                 SendMessage( ipcwindow, WM_COPYDATA, 0, (LPARAM)&wm_data );
 215             }
 216
 217             /* Initialization done.
 218              * Release the mutex to unblock other instances */
 219             ReleaseMutex( hmutex );
 220
 221             /* Bye bye */
 222             system_End( );
 223             exit( 0 );
 224         }
 225     }
 226
 227 #endif
 228 }
 229
 230 static unsigned __stdcall IPCHelperThread( void *data )
 231 {
 232     vlc_object_t *p_this = data;
 233     HWND ipcwindow;
 234     MSG message;
 235
 236     ipcwindow =
 237         CreateWindow( L"STATIC",                     /* name of window class */
 238                   L"VLC ipc "VERSION,               /* window title bar text */
 239                   0,                                         /* window style */
 240                   0,                                 /* default X coordinate */
 241                   0,                                 /* default Y coordinate */
 242                   0,                                         /* window width */
 243                   0,                                        /* window height */
 244                   NULL,                                  /* no parent window */
 245                   NULL,                            /* no menu in this window */
 246                   GetModuleHandle(NULL),  /* handle of this program instance */
 247                   NULL );                               /* sent to WM_CREATE */
 248
 249     SetWindowLongPtr( ipcwindow, GWLP_WNDPROC, (LRESULT)WMCOPYWNDPROC );
 250     SetWindowLongPtr( ipcwindow, GWLP_USERDATA, (LONG_PTR)p_this );
 251
 252     /* Signal the creation of the thread and events queue */
 253     SetEvent( hIPCHelperReady );
 254
 255     while( GetMessage( &message, NULL, 0, 0 ) )
 256     {
 257         TranslateMessage( &message );
 258         DispatchMessage( &message );
 259     }
 260     return 0;
 261 }
 262
 263 LRESULT CALLBACK WMCOPYWNDPROC( HWND hwnd, UINT uMsg, WPARAM wParam,
 264                                 LPARAM lParam )
 265 {
 266     if( uMsg == WM_QUIT  )
 267     {
 268         PostQuitMessage( 0 );
 269     }
 270     else if( uMsg == WM_COPYDATA )
 271     {
 272         COPYDATASTRUCT *pwm_data = (COPYDATASTRUCT*)lParam;
 273         vlc_object_t *p_this;
 274         playlist_t *p_playlist;
 275
 276         p_this = (vlc_object_t *)
 277             (uintptr_t)GetWindowLongPtr( hwnd, GWLP_USERDATA );
 278
 279         if( !p_this ) return 0;
 280
 281         /* Add files to the playlist */
 282         p_playlist = pl_Get( p_this );
 283
 284         if( pwm_data->lpData )
 285         {
 286             char **ppsz_argv;
 287             vlc_ipc_data_t *p_data = (vlc_ipc_data_t *)pwm_data->lpData;
 288             size_t i_data = 0;
 289             int i_argc = p_data->argc, i_opt, i_options;
 290
 291             ppsz_argv = (char **)malloc( i_argc * sizeof(char *) );
 292             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 293             {
 294                 ppsz_argv[i_opt] = p_data->data + i_data + sizeof(size_t);
 295                 i_data += sizeof(size_t) + *((size_t *)(p_data->data + i_data));
 296             }
 297
 298             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 299             {
 300                 i_options = 0;
 301
 302                 /* Count the input options */
 303                 while( i_opt + i_options + 1 < i_argc &&
 304                         *ppsz_argv[ i_opt + i_options + 1 ] == ':' )
 305                 {
 306                     i_options++;
 307                 }
 308
 309                 char *psz_URI = make_URI( ppsz_argv[i_opt], NULL );
 310                 playlist_AddExt( p_playlist, psz_URI,
 311                         NULL, PLAYLIST_APPEND |
 312                         ( ( i_opt || p_data->enqueue ) ? 0 : PLAYLIST_GO ),
 313                         PLAYLIST_END, -1,
 314                         i_options,
 315                         (char const **)( i_options ? &ppsz_argv[i_opt+1] : NULL ),
 316                         VLC_INPUT_OPTION_TRUSTED,
 317                         true, pl_Unlocked );
 318
 319                 i_opt += i_options;
 320                 free( psz_URI );
 321             }
 322
 323             free( ppsz_argv );
 324         }
 325     }
 326
 327     return DefWindowProc( hwnd, uMsg, wParam, lParam );
 328 }
 329
 330 /*****************************************************************************
 331  * system_End: terminate winsock.
 332  *****************************************************************************/
 333 void system_End( void )
 334 {
 335     HWND ipcwindow;
 336
 337     /* FIXME: thread-safety... */
 338     if (p_helper)
 339     {
 340         if( ( ipcwindow = FindWindow( 0, L"VLC ipc "VERSION ) ) != 0 )
 341         {
 342             SendMessage( ipcwindow, WM_QUIT, 0, 0 );
 343         }
 344         vlc_object_release (p_helper);
 345         p_helper = NULL;
 346     }
 347
 348 #if !defined( UNDER_CE )
 349     timeEndPeriod(5);
 350 #endif
 351
 352     WSACleanup();
 353 }