mirror of https://code.videolan.org/videolan/vlc
180 lines
5.9 KiB
C
180 lines
5.9 KiB
C
/*****************************************************************************
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* specific.c: Win32 specific initialization
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*****************************************************************************
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* Copyright (C) 2001-2004, 2010 VLC authors and VideoLAN
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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* Gildas Bazin <gbazin@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifndef UNICODE
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# define UNICODE
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#endif
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#include <vlc_common.h>
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#include "libvlc.h"
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#include "../lib/libvlc_internal.h"
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#include <winsock2.h>
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static int system_InitWSA(int hi, int lo)
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{
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WSADATA data;
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if (WSAStartup(MAKEWORD(hi, lo), &data) == 0)
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{
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if (LOBYTE(data.wVersion) == 2 && HIBYTE(data.wVersion) == 2)
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return 0;
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/* Winsock DLL is not usable */
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WSACleanup( );
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}
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return -1;
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}
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/**
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* Initializes MME timer, Winsock.
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*/
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void system_Init(void)
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{
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if (system_InitWSA(2, 2) && system_InitWSA(1, 1))
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fputs("Error: cannot initialize Winsocks\n", stderr);
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}
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/*****************************************************************************
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* system_Configure: check for system specific configuration options.
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*****************************************************************************/
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/* Must be same as in modules/control/win_msg.c */
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typedef struct
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{
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int argc;
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int enqueue;
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char data[];
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} vlc_ipc_data_t;
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void system_Configure( libvlc_int_t *p_this, int i_argc, const char *const ppsz_argv[] )
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{
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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if( var_InheritBool( p_this, "one-instance" )
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|| ( var_InheritBool( p_this, "one-instance-when-started-from-file" )
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&& var_InheritBool( p_this, "started-from-file" ) ) )
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{
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HANDLE hmutex;
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msg_Info( p_this, "one instance mode ENABLED");
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/* Use a named mutex to check if another instance is already running */
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if( !( hmutex = CreateMutex( 0, TRUE, L"VLC ipc " TEXT(VERSION) ) ) )
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{
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/* Failed for some reason. Just ignore the option and go on as
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* normal. */
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msg_Err( p_this, "one instance mode DISABLED "
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"(mutex couldn't be created)" );
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return;
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}
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if( GetLastError() != ERROR_ALREADY_EXISTS )
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{
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libvlc_InternalAddIntf( p_this, "win_msg,none" );
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/* Initialization done.
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* Release the mutex to unblock other instances */
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ReleaseMutex( hmutex );
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}
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else
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{
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/* Another instance is running */
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HWND ipcwindow;
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/* Wait until the 1st instance is initialized */
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WaitForSingleObject( hmutex, INFINITE );
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/* Locate the window created by the IPC helper thread of the
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* 1st instance */
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if( !( ipcwindow = FindWindow( 0, L"VLC ipc " TEXT(VERSION) ) ) )
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{
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msg_Err( p_this, "one instance mode DISABLED "
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"(couldn't find 1st instance of program)" );
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ReleaseMutex( hmutex );
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return;
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}
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/* We assume that the remaining parameters are filenames
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* and their input options */
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if( i_argc > 0 )
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{
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COPYDATASTRUCT wm_data;
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int i_opt;
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vlc_ipc_data_t *p_data;
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size_t i_data = sizeof (*p_data);
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for( i_opt = 0; i_opt < i_argc; i_opt++ )
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{
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i_data += sizeof (size_t);
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i_data += strlen( ppsz_argv[ i_opt ] ) + 1;
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}
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p_data = malloc( i_data );
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p_data->argc = i_argc;
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p_data->enqueue = var_InheritBool( p_this, "playlist-enqueue" );
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i_data = 0;
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for( i_opt = 0; i_opt < i_argc; i_opt++ )
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{
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size_t i_len = strlen( ppsz_argv[ i_opt ] ) + 1;
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/* Windows will never switch to an architecture
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* with stronger alignment requirements, right. */
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*((size_t *)(p_data->data + i_data)) = i_len;
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i_data += sizeof (size_t);
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memcpy( &p_data->data[i_data], ppsz_argv[ i_opt ], i_len );
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i_data += i_len;
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}
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i_data += sizeof (*p_data);
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/* Send our playlist items to the 1st instance */
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wm_data.dwData = 0;
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wm_data.cbData = i_data;
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wm_data.lpData = p_data;
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SendMessage( ipcwindow, WM_COPYDATA, 0, (LPARAM)&wm_data );
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}
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/* Initialization done.
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* Release the mutex to unblock other instances */
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ReleaseMutex( hmutex );
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/* Bye bye */
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system_End( );
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exit( 0 );
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}
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}
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if( var_InheritBool( p_this, "smtc" ) )
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libvlc_InternalAddIntf( p_this, "win_smtc,none" );
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#endif
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}
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/**
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* Cleans up after system_Init() and system_Configure().
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*/
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void system_End(void)
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{
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/* XXX: In theory, we should not call this if WSAStartup() failed. */
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WSACleanup();
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}
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