fuse_lutlist_content.cpp

00001 
00002 /***************************************************************************
00003  *  fuse_lutlist_content.cpp - FUSE LUT list content encapsulation
00004  *
00005  *  Created: Wed Nov 21 16:33:56 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_lutlist_content.h>
00025 #include <netcomm/utils/dynamic_buffer.h>
00026 
00027 #include <core/exceptions/software.h>
00028 
00029 #include <cstdlib>
00030 #include <cstring>
00031 #include <netinet/in.h>
00032 
00033 using namespace fawkes;
00034 
00035 namespace firevision {
00036 #if 0 /* just to make Emacs auto-indent happy */
00037 }
00038 #endif
00039 
00040 /** @class FuseLutListContent <fvutils/net/fuse_lutlist_content.h>
00041  * FUSE lookup table list content.
00042  * This content provides means to send an arbitrary length list of LUT
00043  * information chunks.
00044  * @author Tim Niemueller
00045  * @ingroup FUSE
00046  * @ingroup FireVision
00047  */
00048 
00049 /** Constructor.
00050  * Creates an empty list.
00051  */
00052 FuseLutListContent::FuseLutListContent()
00053 {
00054   __list = new DynamicBuffer(&(__lutlist_msg.lut_list));
00055   
00056   _payload_size = 0;
00057   _payload = NULL;
00058 }
00059 
00060 
00061 /** Parsing constructor.
00062  * Can be used with the FuseContent::fmsg() method to get correctly parsed output.
00063  * @param type message type, must be FUSE_MT_LUT_LIST
00064  * @param payload payload
00065  * @param payload_size size of payload
00066  * @exception TypeMismatchException thrown if the type is not FUSE_MT_LUT_LIST
00067  */
00068 FuseLutListContent::FuseLutListContent(uint32_t type, void *payload, size_t payload_size)
00069 {
00070   FUSE_lutlist_message_t *tmsg = (FUSE_lutlist_message_t *)payload;
00071   void *list_payload = (void *)((size_t)payload + sizeof(FUSE_lutlist_message_t));
00072   __list = new DynamicBuffer(&(tmsg->lut_list), list_payload,
00073                              payload_size - sizeof(FUSE_lutlist_message_t));
00074 }
00075 
00076 
00077 /** Destructor. */
00078 FuseLutListContent::~FuseLutListContent()
00079 {
00080   delete __list;
00081 }
00082 
00083 
00084 /** Add LUT info.
00085  * @param lut_id LUT ID
00086  * @param width width of LUT
00087  * @param height height of LUT
00088  * @param depth depth of LUT
00089  * @param bytes_per_cell bytes per cell
00090  */
00091 void
00092 FuseLutListContent::add_lutinfo(const char *lut_id,
00093                                 unsigned int width, unsigned int height,
00094                                 unsigned int depth, unsigned int bytes_per_cell)
00095 {
00096   FUSE_lutinfo_t lutinfo;
00097   memset(&lutinfo, 0, sizeof(lutinfo));
00098 
00099   strncpy(lutinfo.lut_id, lut_id, LUT_ID_MAX_LENGTH);
00100   lutinfo.width = ntohl(width);
00101   lutinfo.height = ntohl(height);
00102   lutinfo.depth  = ntohl(depth);  
00103   lutinfo.bytes_per_cell = ntohl(bytes_per_cell);
00104 
00105   __list->append(&lutinfo, sizeof(lutinfo));
00106 }
00107 
00108 
00109 /** Reset iterator. */
00110 void
00111 FuseLutListContent::reset_iterator()
00112 {
00113   __list->reset_iterator();
00114 }
00115 
00116 
00117 /** Check if another LUT info is available.
00118  * @return true if another LUT info is available, false otherwise
00119  */
00120 bool
00121 FuseLutListContent::has_next()
00122 {
00123   return __list->has_next();
00124 }
00125 
00126 
00127 /** Get next LUT info.
00128  * @return next LUT info
00129  * @exception TypeMismatchException thrown if the content contained invalid data
00130  * @exception OutOfBoundsException thrown if no more data is available
00131  */
00132 FUSE_lutinfo_t *
00133 FuseLutListContent::next()
00134 {
00135   size_t size;
00136   void *tmp = __list->next(&size);
00137   if ( size != sizeof(FUSE_lutinfo_t) ) {
00138     throw TypeMismatchException("Lut list content contains element that is of an "
00139                                 "unexpected size");
00140   }
00141 
00142   return (FUSE_lutinfo_t *)tmp;
00143 }
00144 
00145 
00146 void
00147 FuseLutListContent::serialize()
00148 {
00149   _payload_size = sizeof(FUSE_lutlist_message_t) + __list->buffer_size();
00150   _payload = malloc(_payload_size);
00151 
00152   copy_payload(0, &__lutlist_msg, sizeof(FUSE_lutlist_message_t));
00153   copy_payload(sizeof(FUSE_lutlist_message_t), __list->buffer(), __list->buffer_size());
00154 }
00155 
00156 } // end namespace firevision

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