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