Fawkes API
Fawkes Development Version
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00001 00002 /*************************************************************************** 00003 * fuse_imagelist_content.cpp - FUSE image list content encapsulation 00004 * 00005 * Created: Tue Nov 20 15:00:50 2007 00006 * Copyright 2005-2007 Tim Niemueller [www.niemueller.de] 00007 * 00008 ****************************************************************************/ 00009 00010 /* This program is free software; you can redistribute it and/or modify 00011 * it under the terms of the GNU General Public License as published by 00012 * the Free Software Foundation; either version 2 of the License, or 00013 * (at your option) any later version. A runtime exception applies to 00014 * this software (see LICENSE.GPL_WRE file mentioned below for details). 00015 * 00016 * This program is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU Library General Public License for more details. 00020 * 00021 * Read the full text in the LICENSE.GPL_WRE file in the doc directory. 00022 */ 00023 00024 #include <fvutils/net/fuse_imagelist_content.h> 00025 #include <netcomm/utils/dynamic_buffer.h> 00026 #include <core/exceptions/software.h> 00027 00028 #include <cstdlib> 00029 #include <cstring> 00030 #include <netinet/in.h> 00031 00032 using namespace fawkes; 00033 00034 namespace firevision { 00035 #if 0 /* just to make Emacs auto-indent happy */ 00036 } 00037 #endif 00038 00039 /** @class FuseImageListContent <fvutils/net/fuse_imagelist_content.h> 00040 * FUSE image list content. 00041 * This content provides means to send an arbitrary length list of image 00042 * information chunks. 00043 * @author Tim Niemueller 00044 * @ingroup FUSE 00045 * @ingroup FireVision 00046 */ 00047 00048 /** Constructor. 00049 * Creates an empty list. 00050 */ 00051 FuseImageListContent::FuseImageListContent() 00052 { 00053 __list = new DynamicBuffer(&(__imagelist_msg.image_list)); 00054 00055 _payload_size = 0; 00056 _payload = NULL; 00057 } 00058 00059 00060 /** Parsing constructor. 00061 * Can be used with the FuseMessage::msgc() method to get correctly parsed output. 00062 * @param type message type, must be FUSE_MT_IMAGE_LIST 00063 * @param payload payload 00064 * @param payload_size size of payload 00065 * @exception TypeMismatchException thrown if the type is not FUSE_MT_IMAGE_LIST 00066 */ 00067 FuseImageListContent::FuseImageListContent(uint32_t type, void *payload, size_t payload_size) 00068 { 00069 if ( type != FUSE_MT_IMAGE_LIST ) { 00070 throw TypeMismatchException("Type %u not equal to expected type FUSE_MT_IMAGE_LIST (%u)", 00071 type, FUSE_MT_IMAGE_LIST); 00072 } 00073 FUSE_imagelist_message_t *tmsg = (FUSE_imagelist_message_t *)payload; 00074 void *list_payload = (void *)((size_t)payload + sizeof(FUSE_imagelist_message_t)); 00075 __list = new DynamicBuffer(&(tmsg->image_list), list_payload, 00076 payload_size - sizeof(FUSE_imagelist_message_t)); 00077 } 00078 00079 00080 /** Destructor. */ 00081 FuseImageListContent::~FuseImageListContent() 00082 { 00083 delete __list; 00084 } 00085 00086 00087 /** Add image info. 00088 * This can only be called on contents that have been newly created, it is 00089 * a bug to call this method on contents read from the network. 00090 * @param image_id image ID 00091 * @param colorspace colorspace 00092 * @param pixel_width width of image in pixels 00093 * @param pixel_height height of image in pixels 00094 */ 00095 void 00096 FuseImageListContent::add_imageinfo(const char *image_id, colorspace_t colorspace, 00097 unsigned int pixel_width, unsigned int pixel_height) 00098 { 00099 FUSE_imageinfo_t imageinfo; 00100 memset(&imageinfo, 0, sizeof(imageinfo)); 00101 00102 strncpy(imageinfo.image_id, image_id, IMAGE_ID_MAX_LENGTH); 00103 imageinfo.colorspace = htons(colorspace); 00104 imageinfo.width = htonl(pixel_width); 00105 imageinfo.height = htonl(pixel_height); 00106 imageinfo.buffer_size = htonl(colorspace_buffer_size(colorspace, pixel_width, pixel_height)); 00107 00108 __list->append(&imageinfo, sizeof(imageinfo)); 00109 } 00110 00111 00112 /** Reset iterator. */ 00113 void 00114 FuseImageListContent::reset_iterator() 00115 { 00116 __list->reset_iterator(); 00117 } 00118 00119 00120 /** Check if another image info is available. 00121 * @return true if another image info is available, false otherwise 00122 */ 00123 bool 00124 FuseImageListContent::has_next() 00125 { 00126 return __list->has_next(); 00127 } 00128 00129 00130 /** Get next image info. 00131 * @return next image info 00132 * @exception TypeMismatchException thrown if the content contained invalid data 00133 * @exception OutOfBoundsException thrown if no more data is available 00134 */ 00135 FUSE_imageinfo_t * 00136 FuseImageListContent::next() 00137 { 00138 size_t size; 00139 void *tmp = __list->next(&size); 00140 if ( size != sizeof(FUSE_imageinfo_t) ) { 00141 throw TypeMismatchException("Image list content contains element that is of an " 00142 "unexpected size"); 00143 } 00144 00145 return (FUSE_imageinfo_t *)tmp; 00146 } 00147 00148 00149 void 00150 FuseImageListContent::serialize() 00151 { 00152 _payload_size = sizeof(FUSE_imagelist_message_t) + __list->buffer_size(); 00153 _payload = malloc(_payload_size); 00154 00155 copy_payload(0, &__imagelist_msg, sizeof(FUSE_imagelist_message_t)); 00156 copy_payload(sizeof(FUSE_imagelist_message_t), __list->buffer(), __list->buffer_size()); 00157 } 00158 00159 } // end namespace firevision