/*  camserv - An internet streaming picture application * *  Copyright (C) 1999-2002  Jon Travis (jtravis@p00p.org) * *  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 02111-1307, USA. */#include <stdio.h>#include <stdlib.h>#include <string.h>#include "ltdl.h"#include "log.h"#include "video.h"#define MODNAME "video"/* * video_query_active_section: Query the active video section in the *                             camconfig. * * Arguments:                  ccfg  = Camera configuration *                             place = Location to place the section name *                             size  = Size of memory @ place * * Return values:              Returns NULL on failure, else a valid ptr *                             to 'place' */char *video_query_active_section( CamConfig *ccfg, char *place, int size){  const char *val;  val = camconfig_query_str( ccfg, SEC_VIDEO, "video_section" );  if( val == NULL ){    camserv_log( MODNAME, "[%s]:video_section has not been set!",		 SEC_VIDEO );    return NULL;  }  strncpy( place, val, size - 1 );  place[ size - 1 ] = '\0';  return place;}/* * video_setup_funcs:  Open the video module, and fill out the structure *                     with all of the video accessing routines. *                      * Arguments:          ccfg = Camera configuration structure which *                            should contain VIDCONFIG_PATH which holds *                            the location for the video module. *                     vfuncs = Structure to place all of the video functions *                              as they are grabbed from the symbol table. * * Return values:      Returns -1 on failure (if the module could not be *                     opened, or a symbol could not be found), 0 on success. */int video_setup_funcs( CamConfig *ccfg, Video_Funcs *vfuncs ){  lt_dlhandle dlhandle;  char key[ 1024 ];  const char *module_path;  if( video_query_active_section( ccfg, key, sizeof( key )) == NULL )    return -1;  if( (module_path = camconfig_query_str( ccfg, key, "path" )) == NULL ){    camserv_log( MODNAME, "[%s]:path not set!", key );    return -1;  }  if( lt_dlinit() ) {    camserv_log( MODNAME, "%s", lt_dlerror());    return -1;  }  if( (dlhandle = lt_dlopen( module_path )) == NULL ){    camserv_log( MODNAME, "%s", lt_dlerror());    camserv_log( MODNAME, "Error opening video driver; \"%s\"", module_path );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_open = lt_dlsym( dlhandle, VIDSYM_OPEN ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_close = lt_dlsym( dlhandle, VIDSYM_CLOSE ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_init = lt_dlsym( dlhandle, VIDSYM_INIT ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_deinit = lt_dlsym( dlhandle, VIDSYM_DEINIT ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_snap = lt_dlsym( dlhandle, VIDSYM_SNAP ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_get_geom = lt_dlsym( dlhandle, VIDSYM_GET_GEOM ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  if( !(vfuncs->video_modinfo_query = lt_dlsym( dlhandle, VIDSYM_MODINFO ))){    camserv_log( MODNAME, lt_dlerror() );    lt_dlclose( dlhandle );    lt_dlexit();    return -1;  }  return 0;}