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