git.sesse.net Git - vlc/blob - src/misc/win32_specific.c

   1 /*****************************************************************************
   2  * win32_specific.c: Win32 specific features
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include "../libvlc.h"
  31 #include <vlc_playlist.h>
  32 #include <vlc_charset.h>
  33
  34 #ifdef WIN32                       /* optind, getopt(), included in unistd.h */
  35 #   include "../extras/getopt.h"
  36 #endif
  37
  38 #if !defined( UNDER_CE )
  39 #   include <io.h>
  40 #   include <fcntl.h>
  41 #endif
  42
  43 #include <winsock.h>
  44
  45 /*****************************************************************************
  46  * system_Init: initialize winsock and misc other things.
  47  *****************************************************************************/
  48 void system_Init( libvlc_int_t *p_this, int *pi_argc, const char *ppsz_argv[] )
  49 {
  50     WSADATA Data;
  51
  52     /* Get our full path */
  53     char psz_path[MAX_PATH];
  54     char *psz_vlc;
  55
  56 #if defined( UNDER_CE )
  57     wchar_t psz_wpath[MAX_PATH];
  58     if( GetModuleFileName( NULL, psz_wpath, MAX_PATH ) )
  59     {
  60         WideCharToMultiByte( CP_ACP, 0, psz_wpath, -1,
  61                              psz_path, MAX_PATH, NULL, NULL );
  62     }
  63     else psz_path[0] = '\0';
  64
  65 #else
  66     if( ppsz_argv[0] )
  67     {
  68         GetFullPathName( ppsz_argv[0], MAX_PATH, psz_path, &psz_vlc );
  69     }
  70     else if( !GetModuleFileName( NULL, psz_path, MAX_PATH ) )
  71     {
  72         psz_path[0] = '\0';
  73     }
  74 #endif
  75
  76     if( (psz_vlc = strrchr( psz_path, '\\' )) ) *psz_vlc = '\0';
  77
  78 #ifndef HAVE_RELEASE
  79     {
  80         /* remove trailing \.libs from executable dir path if seen,
  81            we assume we are running vlc through libtool wrapper in build dir */
  82         int offset  = strlen(psz_path)-sizeof("\\.libs")+1;
  83         if( offset > 0 )
  84         {
  85             psz_vlc = psz_path+offset;
  86             if( ! strcmp(psz_vlc, "\\.libs") ) *psz_vlc = '\0';
  87         }
  88     }
  89 #endif
  90
  91     vlc_global()->psz_vlcpath = strdup( psz_path );
  92
  93     /* Set the default file-translation mode */
  94 #if !defined( UNDER_CE )
  95     _fmode = _O_BINARY;
  96     _setmode( _fileno( stdin ), _O_BINARY ); /* Needed for pipes */
  97 #endif
  98
  99     /* Call mdate() once to make sure it is initialized properly */
 100     mdate();
 101
 102     /* WinSock Library Init. */
 103     if( !WSAStartup( MAKEWORD( 2, 2 ), &Data ) )
 104     {
 105         /* Aah, pretty useless check, we should always have Winsock 2.2
 106          * since it appeared in Win98. */
 107         if( LOBYTE( Data.wVersion ) != 2 || HIBYTE( Data.wVersion ) != 2 )
 108             /* We could not find a suitable WinSock DLL. */
 109             WSACleanup( );
 110         else
 111             /* Everything went ok. */
 112             return;
 113     }
 114
 115     /* Let's try with WinSock 1.1 */
 116     if( !WSAStartup( MAKEWORD( 1, 1 ), &Data ) )
 117     {
 118         /* Confirm that the WinSock DLL supports 1.1.*/
 119         if( LOBYTE( Data.wVersion ) != 1 || HIBYTE( Data.wVersion ) != 1 )
 120             /* We could not find a suitable WinSock DLL. */
 121             WSACleanup( );
 122         else
 123             /* Everything went ok. */
 124             return;
 125     }
 126
 127     fprintf( stderr, "error: can't initialize WinSocks\n" );
 128 }
 129
 130 /*****************************************************************************
 131  * system_Configure: check for system specific configuration options.
 132  *****************************************************************************/
 133 static void IPCHelperThread( vlc_object_t * );
 134 LRESULT CALLBACK WMCOPYWNDPROC( HWND, UINT, WPARAM, LPARAM );
 135 typedef struct
 136 {
 137   int argc;
 138   int enqueue;
 139   char data[0];
 140 } vlc_ipc_data_t;
 141
 142 void system_Configure( libvlc_int_t *p_this, int *pi_argc, const char *ppsz_argv[] )
 143 {
 144 #if !defined( UNDER_CE )
 145     /* Raise default priority of the current process */
 146 #ifndef ABOVE_NORMAL_PRIORITY_CLASS
 147 #   define ABOVE_NORMAL_PRIORITY_CLASS 0x00008000
 148 #endif
 149     if( config_GetInt( p_this, "high-priority" ) )
 150     {
 151         if( SetPriorityClass( GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS )
 152              || SetPriorityClass( GetCurrentProcess(), HIGH_PRIORITY_CLASS ) )
 153         {
 154             msg_Dbg( p_this, "raised process priority" );
 155         }
 156         else
 157         {
 158             msg_Dbg( p_this, "could not raise process priority" );
 159         }
 160     }
 161
 162     if( config_GetInt( p_this, "one-instance" )
 163         || ( config_GetInt( p_this, "one-instance-when-started-from-file" )
 164              && config_GetInt( p_this, "started-from-file" ) ) )
 165     {
 166         HANDLE hmutex;
 167
 168         msg_Info( p_this, "one instance mode ENABLED");
 169
 170         /* Use a named mutex to check if another instance is already running */
 171         if( !( hmutex = CreateMutex( 0, TRUE, _T("VLC ipc ") _T(VERSION) ) ) )
 172         {
 173             /* Failed for some reason. Just ignore the option and go on as
 174              * normal. */
 175             msg_Err( p_this, "one instance mode DISABLED "
 176                      "(mutex couldn't be created)" );
 177             return;
 178         }
 179
 180         if( GetLastError() != ERROR_ALREADY_EXISTS )
 181         {
 182             /* We are the 1st instance. */
 183             vlc_object_t *p_helper =
 184              (vlc_object_t *)vlc_object_create( p_this, sizeof(vlc_object_t) );
 185
 186             /* Run the helper thread */
 187             if( vlc_thread_create( p_helper, "IPC helper", IPCHelperThread,
 188                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 189             {
 190                 msg_Err( p_this, "one instance mode DISABLED "
 191                          "(IPC helper thread couldn't be created)" );
 192
 193             }
 194
 195             /* Initialization done.
 196              * Release the mutex to unblock other instances */
 197             ReleaseMutex( hmutex );
 198         }
 199         else
 200         {
 201             /* Another instance is running */
 202
 203             HWND ipcwindow;
 204
 205             /* Wait until the 1st instance is initialized */
 206             WaitForSingleObject( hmutex, INFINITE );
 207
 208             /* Locate the window created by the IPC helper thread of the
 209              * 1st instance */
 210             if( !( ipcwindow = FindWindow( 0, _T("VLC ipc ") _T(VERSION) ) ) )
 211             {
 212                 msg_Err( p_this, "one instance mode DISABLED "
 213                          "(couldn't find 1st instance of program)" );
 214                 ReleaseMutex( hmutex );
 215                 return;
 216             }
 217
 218             /* We assume that the remaining parameters are filenames
 219              * and their input options */
 220             if( *pi_argc - 1 >= optind )
 221             {
 222                 COPYDATASTRUCT wm_data;
 223                 int i_opt;
 224                 vlc_ipc_data_t *p_data;
 225                 size_t i_data = sizeof (*p_data);
 226
 227                 for( i_opt = optind; i_opt < *pi_argc; i_opt++ )
 228                 {
 229                     i_data += sizeof (size_t);
 230                     i_data += strlen( ppsz_argv[ i_opt ] ) + 1;
 231                 }
 232
 233                 p_data = malloc( i_data );
 234                 p_data->argc = *pi_argc - optind;
 235                 p_data->enqueue = config_GetInt( p_this, "playlist-enqueue" );
 236                 i_data = 0;
 237                 for( i_opt = optind; i_opt < *pi_argc; i_opt++ )
 238                 {
 239                     size_t i_len = strlen( ppsz_argv[ i_opt ] ) + 1;
 240                     /* Windows will never switch to an architecture
 241                      * with stronger alignment requirements, right. */
 242                     *((size_t *)(p_data->data + i_data)) = i_len;
 243                     i_data += sizeof (size_t);
 244                     memcpy( &p_data->data[i_data], ppsz_argv[ i_opt ], i_len );
 245                     i_data += i_len;
 246                 }
 247                 i_data += sizeof (*p_data);
 248
 249                 /* Send our playlist items to the 1st instance */
 250                 wm_data.dwData = 0;
 251                 wm_data.cbData = i_data;
 252                 wm_data.lpData = p_data;
 253                 SendMessage( ipcwindow, WM_COPYDATA, 0, (LPARAM)&wm_data );
 254             }
 255
 256             /* Initialization done.
 257              * Release the mutex to unblock other instances */
 258             ReleaseMutex( hmutex );
 259
 260             /* Bye bye */
 261             system_End( p_this );
 262             exit( 0 );
 263         }
 264     }
 265
 266 #endif
 267 }
 268
 269 static void IPCHelperThread( vlc_object_t *p_this )
 270 {
 271     HWND ipcwindow;
 272     MSG message;
 273
 274     ipcwindow =
 275         CreateWindow( _T("STATIC"),                  /* name of window class */
 276                   _T("VLC ipc ") _T(VERSION),       /* window title bar text */
 277                   0,                                         /* window style */
 278                   0,                                 /* default X coordinate */
 279                   0,                                 /* default Y coordinate */
 280                   0,                                         /* window width */
 281                   0,                                        /* window height */
 282                   NULL,                                  /* no parent window */
 283                   NULL,                            /* no menu in this window */
 284                   GetModuleHandle(NULL),  /* handle of this program instance */
 285                   NULL );                               /* sent to WM_CREATE */
 286
 287     SetWindowLong( ipcwindow, GWL_WNDPROC, (LONG)WMCOPYWNDPROC );
 288     SetWindowLong( ipcwindow, GWL_USERDATA, (LONG)p_this );
 289
 290     /* Signal the creation of the thread and events queue */
 291     vlc_thread_ready( p_this );
 292
 293     while( GetMessage( &message, NULL, 0, 0 ) )
 294     {
 295         TranslateMessage( &message );
 296         DispatchMessage( &message );
 297     }
 298 }
 299
 300 LRESULT CALLBACK WMCOPYWNDPROC( HWND hwnd, UINT uMsg, WPARAM wParam,
 301                                 LPARAM lParam )
 302 {
 303     if( uMsg == WM_COPYDATA )
 304     {
 305         COPYDATASTRUCT *pwm_data = (COPYDATASTRUCT*)lParam;
 306         vlc_object_t *p_this;
 307         playlist_t *p_playlist;
 308
 309         p_this = (vlc_object_t *)GetWindowLong( hwnd, GWL_USERDATA );
 310
 311         if( !p_this ) return 0;
 312
 313         /* Add files to the playlist */
 314         p_playlist = (playlist_t *)vlc_object_find( p_this,
 315                                                     VLC_OBJECT_PLAYLIST,
 316                                                     FIND_ANYWHERE );
 317         if( !p_playlist ) return 0;
 318
 319         if( pwm_data->lpData )
 320         {
 321             char **ppsz_argv;
 322             vlc_ipc_data_t *p_data = (vlc_ipc_data_t *)pwm_data->lpData;
 323             size_t i_data = 0;
 324             int i_argc = p_data->argc, i_opt, i_options;
 325
 326             ppsz_argv = (char **)malloc( i_argc * sizeof(char *) );
 327             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 328             {
 329                 ppsz_argv[i_opt] = p_data->data + i_data + sizeof(int);
 330                 i_data += sizeof(int) + *((int *)(p_data->data + i_data));
 331             }
 332
 333             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 334             {
 335                 i_options = 0;
 336
 337                 /* Count the input options */
 338                 while( i_opt + i_options + 1 < i_argc &&
 339                        *ppsz_argv[ i_opt + i_options + 1 ] == ':' )
 340                 {
 341                     i_options++;
 342                 }
 343                 playlist_AddExt( p_playlist, ppsz_argv[i_opt],
 344                   NULL, PLAYLIST_APPEND |
 345                         ( ( i_opt || p_data->enqueue ) ? 0 : PLAYLIST_GO ),
 346                   PLAYLIST_END, -1,
 347                   (char const **)( i_options ? &ppsz_argv[i_opt+1] : NULL ),
 348                   i_options, VLC_TRUE, VLC_FALSE );
 349
 350                 i_opt += i_options;
 351             }
 352
 353             free( ppsz_argv );
 354         }
 355
 356         vlc_object_release( p_playlist );
 357     }
 358
 359     return DefWindowProc( hwnd, uMsg, wParam, lParam );
 360 }
 361
 362 /*****************************************************************************
 363  * system_End: terminate winsock.
 364  *****************************************************************************/
 365 void system_End( libvlc_int_t *p_this )
 366 {
 367     if( p_this && vlc_global() )
 368     {
 369         free( vlc_global()->psz_vlcpath );
 370         vlc_global()->psz_vlcpath = NULL;
 371     }
 372
 373     WSACleanup();
 374 }
 375
 376 /*****************************************************************************
 377  *  system_VLCPath
 378  *  **************************************************************************/
 379 const char* system_VLCPath( void )
 380 {
 381     libvlc_global_data_t* libvlc_global = vlc_global();
 382     return libvlc_global->psz_vlcpath;
 383 }