/***************************************************************************** * modules_plugin.h : Plugin management functions used by the core application. ***************************************************************************** * Copyright (C) 2001 VideoLAN * $Id: modules_plugin.h,v 1.14 2002/03/04 23:56:38 massiot Exp $ * * Authors: Samuel Hocevar * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************/ /***************************************************************************** * Inline functions for handling dynamic modules *****************************************************************************/ /***************************************************************************** * module_load: load a dynamic library ***************************************************************************** * This function loads a dynamically linked library using a system dependant * method, and returns a non-zero value on error, zero otherwise. *****************************************************************************/ static __inline__ int module_load( char * psz_filename, module_handle_t * handle ) { #ifdef SYS_BEOS *handle = load_add_on( psz_filename ); return( *handle < 0 ); #elif defined(WIN32) *handle = LoadLibrary( psz_filename ); return( *handle == NULL ); #elif defined(RTLD_NOW) /* Do not open modules with RTLD_GLOBAL, or we are going to get namespace * collisions when two modules have common public symbols */ *handle = dlopen( psz_filename, RTLD_NOW ); return( *handle == NULL ); #else *handle = dlopen( psz_filename, DL_LAZY ); return( *handle == NULL ); #endif } /***************************************************************************** * module_unload: unload a dynamic library ***************************************************************************** * This function unloads a previously opened dynamically linked library * using a system dependant method. No return value is taken in consideration, * since some libraries sometimes refuse to close properly. *****************************************************************************/ static __inline__ void module_unload( module_handle_t handle ) { #ifdef SYS_BEOS unload_add_on( handle ); #elif defined(WIN32) FreeLibrary( handle ); #else dlclose( handle ); #endif return; } /***************************************************************************** * module_getsymbol: get a symbol from a dynamic library ***************************************************************************** * This function queries a loaded library for a symbol specified in a * string, and returns a pointer to it. We don't check for dlerror() or * similar functions, since we want a non-NULL symbol anyway. *****************************************************************************/ static __inline__ void * module_getsymbol_inner( module_handle_t handle, char * psz_function ) { #ifdef SYS_BEOS void * p_symbol; if( B_OK == get_image_symbol( handle, psz_function, B_SYMBOL_TYPE_TEXT, &p_symbol ) ) { return( p_symbol ); } else { return( NULL ); } #elif defined(WIN32) return( (void *)GetProcAddress( handle, psz_function ) ); #else return( dlsym( handle, psz_function ) ); #endif } static __inline__ void * module_getsymbol( module_handle_t handle, char * psz_function ) { void * p_symbol = module_getsymbol_inner( handle, psz_function ); /* MacOS X dl library expects symbols to begin with "_". So do * some other operating systems. That's really lame, but hey, what * can we do ? */ if( p_symbol == NULL ) { char *psz_call = malloc( strlen( psz_function ) + 2 ); strcpy( psz_call + 1, psz_function ); psz_call[ 0 ] = '_'; p_symbol = module_getsymbol_inner( handle, psz_call ); free( psz_call ); } return p_symbol; } /***************************************************************************** * module_error: wrapper for dlerror() ***************************************************************************** * This function returns the error message of the last module operation. It * returns the string "failed" on systems which do not have the dlerror() * function. *****************************************************************************/ static __inline__ const char * module_error( void ) { #if defined(SYS_BEOS) || defined(WIN32) return( "failed" ); #else return( dlerror() ); #endif } /***************************************************************************** * STORE_SYMBOLS: store known symbols into p_symbols for plugin access. *****************************************************************************/ #define STORE_SYMBOLS( p_symbols ) \ (p_symbols)->p_main = p_main; \ (p_symbols)->p_input_bank = p_input_bank; \ (p_symbols)->p_aout_bank = p_aout_bank; \ (p_symbols)->p_vout_bank = p_vout_bank; \ (p_symbols)->config_GetIntVariable = config_GetIntVariable; \ (p_symbols)->config_GetPszVariable = config_GetPszVariable; \ (p_symbols)->config_PutIntVariable = config_PutIntVariable; \ (p_symbols)->config_PutPszVariable = config_PutPszVariable; \ (p_symbols)->config_Duplicate = config_Duplicate; \ (p_symbols)->config_FindConfig = config_FindConfig; \ (p_symbols)->intf_MsgSub = intf_MsgSub; \ (p_symbols)->intf_MsgUnsub = intf_MsgUnsub; \ (p_symbols)->intf_Msg = intf_Msg; \ (p_symbols)->intf_ErrMsg = intf_ErrMsg; \ (p_symbols)->intf_StatMsg = intf_StatMsg;\ (p_symbols)->intf_WarnMsg = intf_WarnMsg; \ (p_symbols)->intf_PlaylistAdd = intf_PlaylistAdd; \ (p_symbols)->intf_PlaylistDelete = intf_PlaylistDelete; \ (p_symbols)->intf_PlaylistNext = intf_PlaylistNext; \ (p_symbols)->intf_PlaylistPrev = intf_PlaylistPrev; \ (p_symbols)->intf_PlaylistDestroy = intf_PlaylistDestroy; \ (p_symbols)->intf_PlaylistJumpto = intf_PlaylistJumpto; \ (p_symbols)->intf_UrlDecode = intf_UrlDecode; \ (p_symbols)->intf_Eject = intf_Eject; \ (p_symbols)->msleep = msleep; \ (p_symbols)->mdate = mdate; \ (p_symbols)->mstrtime = mstrtime; \ (p_symbols)->network_ChannelCreate = network_ChannelCreate; \ (p_symbols)->network_ChannelJoin = network_ChannelJoin; \ (p_symbols)->input_SetProgram = input_SetProgram; \ (p_symbols)->input_SetStatus = input_SetStatus; \ (p_symbols)->input_Seek = input_Seek; \ (p_symbols)->input_DumpStream = input_DumpStream; \ (p_symbols)->input_OffsetToTime = input_OffsetToTime; \ (p_symbols)->input_ChangeES = input_ChangeES; \ (p_symbols)->input_ToggleES = input_ToggleES; \ (p_symbols)->input_ChangeProgram = input_ChangeProgram; \ (p_symbols)->input_ChangeArea = input_ChangeArea; \ (p_symbols)->input_FindES = input_FindES; \ (p_symbols)->input_AddES = input_AddES; \ (p_symbols)->input_DelES = input_DelES; \ (p_symbols)->input_SelectES = input_SelectES; \ (p_symbols)->input_UnselectES = input_UnselectES; \ (p_symbols)->input_AddProgram = input_AddProgram; \ (p_symbols)->input_DelProgram = input_DelProgram; \ (p_symbols)->input_AddArea = input_AddArea; \ (p_symbols)->input_DelArea = input_DelArea; \ (p_symbols)->InitBitstream = InitBitstream; \ (p_symbols)->NextDataPacket = NextDataPacket; \ (p_symbols)->BitstreamNextDataPacket = BitstreamNextDataPacket; \ (p_symbols)->DecoderError = DecoderError; \ (p_symbols)->input_InitStream = input_InitStream; \ (p_symbols)->input_EndStream = input_EndStream; \ (p_symbols)->input_ParsePES = input_ParsePES; \ (p_symbols)->input_GatherPES = input_GatherPES; \ (p_symbols)->input_DecodePES = input_DecodePES; \ (p_symbols)->input_ReadPS = input_ReadPS; \ (p_symbols)->input_ParsePS = input_ParsePS; \ (p_symbols)->input_DemuxPS = input_DemuxPS; \ (p_symbols)->input_ReadTS = input_ReadTS; \ (p_symbols)->input_DemuxTS = input_DemuxTS; \ (p_symbols)->input_DemuxPSI = input_DemuxPSI; \ (p_symbols)->input_ClockManageControl = input_ClockManageControl; \ (p_symbols)->input_FDSeek = input_FDSeek; \ (p_symbols)->input_FDClose = input_FDClose; \ (p_symbols)->input_FDRead = input_FDRead; \ (p_symbols)->input_FDNetworkRead = input_FDNetworkRead; \ (p_symbols)->input_BuffersInit = input_BuffersInit; \ (p_symbols)->input_BuffersEnd = input_BuffersEnd; \ (p_symbols)->input_NewBuffer = input_NewBuffer; \ (p_symbols)->input_ReleaseBuffer = input_ReleaseBuffer; \ (p_symbols)->input_ShareBuffer = input_ShareBuffer; \ (p_symbols)->input_NewPacket = input_NewPacket; \ (p_symbols)->input_DeletePacket = input_DeletePacket; \ (p_symbols)->input_NewPES = input_NewPES; \ (p_symbols)->input_DeletePES = input_DeletePES; \ (p_symbols)->input_FillBuffer = input_FillBuffer; \ (p_symbols)->input_Peek = input_Peek; \ (p_symbols)->input_SplitBuffer = input_SplitBuffer; \ (p_symbols)->input_AccessInit = input_AccessInit; \ (p_symbols)->input_AccessReinit = input_AccessReinit; \ (p_symbols)->input_AccessEnd = input_AccessEnd; \ (p_symbols)->aout_CreateFifo = aout_CreateFifo; \ (p_symbols)->aout_DestroyFifo = aout_DestroyFifo; \ (p_symbols)->vout_CreateThread = vout_CreateThread; \ (p_symbols)->vout_DestroyThread = vout_DestroyThread; \ (p_symbols)->vout_CreateSubPicture = vout_CreateSubPicture; \ (p_symbols)->vout_DestroySubPicture = vout_DestroySubPicture; \ (p_symbols)->vout_DisplaySubPicture = vout_DisplaySubPicture; \ (p_symbols)->vout_CreatePicture = vout_CreatePicture; \ (p_symbols)->vout_AllocatePicture = vout_AllocatePicture; \ (p_symbols)->vout_DisplayPicture = vout_DisplayPicture; \ (p_symbols)->vout_DestroyPicture = vout_DestroyPicture; \ (p_symbols)->vout_DatePicture = vout_DatePicture; \ (p_symbols)->vout_LinkPicture = vout_LinkPicture; \ (p_symbols)->vout_UnlinkPicture = vout_UnlinkPicture; \ (p_symbols)->vout_PlacePicture = vout_PlacePicture; \ (p_symbols)->UnalignedGetBits = UnalignedGetBits; \ (p_symbols)->UnalignedRemoveBits = UnalignedRemoveBits; \ (p_symbols)->UnalignedShowBits = UnalignedShowBits; \ (p_symbols)->CurrentPTS = CurrentPTS; \ (p_symbols)->DecodeLanguage = DecodeLanguage; \ (p_symbols)->module_Need = module_Need; \ (p_symbols)->module_Unneed = module_Unneed;