[1711] | 1 | /* |
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| 2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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| 3 | * > www.orxonox.net < |
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| 4 | * |
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| 5 | * |
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| 6 | * License notice: |
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| 7 | * |
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| 8 | * This program is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU General Public License |
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| 10 | * as published by the Free Software Foundation; either version 2 |
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| 11 | * of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * This program is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with this program; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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| 21 | * |
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| 22 | * Author: |
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| 23 | * Oliver Scheuss, (C) 2008 |
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| 24 | * Co-authors: |
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| 25 | * ... |
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| 26 | * |
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| 27 | */ |
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| 28 | |
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[1701] | 29 | #include "Gamestate.h" |
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| 30 | #include "network/ClientInformation.h" |
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[1705] | 31 | #include "network/GamestateHandler.h" |
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[1763] | 32 | #include "core/CoreIncludes.h" |
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[1751] | 33 | #include "core/Iterator.h" |
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[1701] | 34 | |
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| 35 | #include <zlib.h> |
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| 36 | #include <assert.h> |
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| 37 | |
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| 38 | |
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| 39 | |
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| 40 | namespace network { |
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| 41 | |
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| 42 | namespace packet { |
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| 43 | |
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[1751] | 44 | #define GAMESTATE_START(data) (data + sizeof(GamestateHeader)) |
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[1701] | 45 | #define GAMESTATE_HEADER(data) ((GamestateHeader *)data) |
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| 46 | #define HEADER GAMESTATE_HEADER(data_) |
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[1740] | 47 | |
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[2031] | 48 | |
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[1907] | 49 | #define PACKET_FLAG_GAMESTATE ENET_PACKET_FLAG_RELIABLE |
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[2031] | 50 | |
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[1701] | 51 | Gamestate::Gamestate() |
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| 52 | { |
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[1907] | 53 | flags_ = flags_ | PACKET_FLAG_GAMESTATE; |
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[1701] | 54 | } |
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| 55 | |
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[1907] | 56 | Gamestate::Gamestate(uint8_t *data, unsigned int clientID): |
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[1711] | 57 | Packet(data, clientID) |
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[1701] | 58 | { |
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[1907] | 59 | flags_ = flags_ | PACKET_FLAG_GAMESTATE; |
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[1701] | 60 | } |
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| 61 | |
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[1907] | 62 | Gamestate::Gamestate(uint8_t *data) |
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| 63 | { |
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| 64 | flags_ = flags_ | PACKET_FLAG_GAMESTATE; |
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| 65 | data_=data; |
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| 66 | } |
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[1701] | 67 | |
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[1907] | 68 | |
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[1701] | 69 | Gamestate::~Gamestate() |
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| 70 | { |
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| 71 | } |
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| 72 | |
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| 73 | bool Gamestate::collectData(int id, int mode) |
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| 74 | { |
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| 75 | int tempsize=0, currentsize=0; |
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[1751] | 76 | assert(data_==0); |
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| 77 | int size = calcGamestateSize(id, mode); |
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[1740] | 78 | |
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[1701] | 79 | COUT(4) << "G.ST.Man: producing gamestate with id: " << id << std::endl; |
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| 80 | if(size==0) |
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| 81 | return false; |
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| 82 | data_ = new unsigned char[size + sizeof(GamestateHeader)]; |
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| 83 | if(!data_){ |
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| 84 | COUT(2) << "GameStateManager: could not allocate memory" << std::endl; |
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| 85 | return false; |
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| 86 | } |
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[2031] | 87 | |
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[1907] | 88 | #ifndef NDEBUG |
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| 89 | std::list<Synchronisable*> slist; |
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| 90 | std::list<Synchronisable*>::iterator iit; |
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| 91 | #endif |
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[1701] | 92 | //start collect data synchronisable by synchronisable |
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[1907] | 93 | uint8_t *mem=data_; |
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[1701] | 94 | mem+=sizeof(GamestateHeader); |
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[1747] | 95 | orxonox::ObjectList<Synchronisable>::iterator it; |
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| 96 | for(it = orxonox::ObjectList<Synchronisable>::begin(); it; ++it){ |
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[1907] | 97 | tempsize=it->getSize(id, mode); |
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[1740] | 98 | |
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[1701] | 99 | if(currentsize+tempsize > size){ |
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| 100 | // start allocate additional memory |
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| 101 | COUT(3) << "G.St.Man: need additional memory" << std::endl; |
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[1747] | 102 | orxonox::ObjectList<Synchronisable>::iterator temp = it; |
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[1701] | 103 | int addsize=tempsize; |
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| 104 | while(++temp) |
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[1907] | 105 | addsize+=temp->getSize(id, mode); |
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| 106 | data_ = (uint8_t *)realloc(data_, sizeof(GamestateHeader) + currentsize + addsize); |
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[1701] | 107 | if(!data_) |
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| 108 | return false; |
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| 109 | size = currentsize+addsize; |
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| 110 | }// stop allocate additional memory |
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| 111 | |
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[1907] | 112 | #ifndef NDEBUG |
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| 113 | for(iit=slist.begin(); iit!=slist.end(); iit++) |
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| 114 | assert((*iit)!=*it); |
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| 115 | slist.push_back(*it); |
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| 116 | #endif |
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[2031] | 117 | |
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[1907] | 118 | //if(it->doSelection(id)) |
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| 119 | dataMap_[mem-data_]=(*it); // save the mem location of the synchronisable data |
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[1751] | 120 | if(!it->getData(mem, id, mode)) |
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[1701] | 121 | return false; // mem pointer gets automatically increased because of call by reference |
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| 122 | // increase size counter by size of current synchronisable |
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| 123 | currentsize+=tempsize; |
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| 124 | } |
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[1740] | 125 | |
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| 126 | |
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[1701] | 127 | //start write gamestate header |
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[1710] | 128 | HEADER->packetType = ENUM::Gamestate; |
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[1740] | 129 | assert( *(ENUM::Type *)(data_) == ENUM::Gamestate); |
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[1907] | 130 | HEADER->datasize = currentsize; |
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[1701] | 131 | HEADER->id = id; |
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| 132 | HEADER->diffed = false; |
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| 133 | HEADER->complete = true; |
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[1715] | 134 | HEADER->compressed = false; |
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[1701] | 135 | //stop write gamestate header |
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[1740] | 136 | |
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[1701] | 137 | COUT(5) << "G.ST.Man: Gamestate size: " << currentsize << std::endl; |
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| 138 | COUT(5) << "G.ST.Man: 'estimated' (and corrected) Gamestate size: " << size << std::endl; |
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| 139 | return true; |
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| 140 | } |
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| 141 | |
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| 142 | bool Gamestate::spreadData(int mode) |
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| 143 | { |
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[1751] | 144 | assert(data_); |
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| 145 | assert(!HEADER->compressed); |
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| 146 | assert(!HEADER->diffed); |
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[1907] | 147 | uint8_t *mem=data_+sizeof(GamestateHeader); |
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[1701] | 148 | // get the start of the Synchronisable list |
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[1907] | 149 | //orxonox::ObjectList<Synchronisable>::iterator it=orxonox::ObjectList<Synchronisable>::begin(); |
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| 150 | Synchronisable *s; |
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[1740] | 151 | |
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[1907] | 152 | // update the data of the objects we received |
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| 153 | while(mem < data_+sizeof(GamestateHeader)+HEADER->datasize){ |
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| 154 | synchronisableHeader *objectheader = (synchronisableHeader*)mem; |
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[1701] | 155 | |
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[1907] | 156 | s = Synchronisable::getSynchronisable( objectheader->objectID ); |
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| 157 | if(!s) |
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[1701] | 158 | { |
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[2035] | 159 | Synchronisable::fabricate(mem, mode); |
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[1701] | 160 | } |
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[1907] | 161 | else |
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| 162 | { |
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| 163 | bool b = s->updateData(mem, mode); |
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[2035] | 164 | assert(b); |
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[1907] | 165 | //if(!s->updateData(mem, mode)) |
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| 166 | //return false; |
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| 167 | } |
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[1701] | 168 | } |
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| 169 | |
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| 170 | return true; |
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| 171 | } |
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| 172 | |
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[1907] | 173 | |
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| 174 | |
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[1705] | 175 | int Gamestate::getID(){ |
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| 176 | return HEADER->id; |
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| 177 | } |
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| 178 | |
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[1701] | 179 | unsigned int Gamestate::getSize() const |
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| 180 | { |
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[1711] | 181 | assert(data_); |
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[1715] | 182 | if(HEADER->compressed) |
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[1701] | 183 | return HEADER->compsize+sizeof(GamestateHeader); |
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| 184 | else |
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| 185 | { |
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[1907] | 186 | return HEADER->datasize+sizeof(GamestateHeader); |
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[1701] | 187 | } |
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| 188 | } |
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| 189 | |
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[1751] | 190 | bool Gamestate::operator==(packet::Gamestate gs){ |
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[1907] | 191 | uint8_t *d1 = data_+sizeof(GamestateHeader); |
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| 192 | uint8_t *d2 = gs.data_+sizeof(GamestateHeader); |
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[1751] | 193 | assert(!isCompressed()); |
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| 194 | assert(!gs.isCompressed()); |
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[1907] | 195 | while(d1<data_+HEADER->datasize) |
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[1751] | 196 | { |
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| 197 | if(*d1!=*d2) |
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| 198 | return false; |
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| 199 | d1++; |
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| 200 | d2++; |
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| 201 | } |
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| 202 | return true; |
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| 203 | } |
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| 204 | |
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[1701] | 205 | bool Gamestate::process() |
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| 206 | { |
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[1705] | 207 | return GamestateHandler::addGamestate(this, getClientID()); |
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[1701] | 208 | } |
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| 209 | |
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[1907] | 210 | |
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| 211 | |
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[1701] | 212 | bool Gamestate::compressData() |
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| 213 | { |
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| 214 | assert(HEADER); |
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[1751] | 215 | assert(!HEADER->compressed); |
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[1907] | 216 | uLongf buffer = (uLongf)(((HEADER->datasize + 12)*1.01)+1); |
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[1701] | 217 | if(buffer==0) |
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| 218 | return false; |
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[1740] | 219 | |
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[1907] | 220 | uint8_t *ndata = new uint8_t[buffer+sizeof(GamestateHeader)]; |
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| 221 | uint8_t *dest = GAMESTATE_START(ndata); |
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[1751] | 222 | //unsigned char *dest = new unsigned char[buffer]; |
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[1907] | 223 | uint8_t *source = GAMESTATE_START(data_); |
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[1701] | 224 | int retval; |
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[1907] | 225 | retval = compress( dest, &buffer, source, (uLong)(HEADER->datasize) ); |
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[1701] | 226 | switch ( retval ) { |
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| 227 | case Z_OK: COUT(5) << "G.St.Man: compress: successfully compressed" << std::endl; break; |
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[1751] | 228 | case Z_MEM_ERROR: COUT(1) << "G.St.Man: compress: not enough memory available in gamestate.compress" << std::endl; return false; |
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| 229 | case Z_BUF_ERROR: COUT(2) << "G.St.Man: compress: not enough memory available in the buffer in gamestate.compress" << std::endl; return false; |
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| 230 | case Z_DATA_ERROR: COUT(2) << "G.St.Man: compress: data corrupted in gamestate.compress" << std::endl; return false; |
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[1701] | 231 | } |
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[1751] | 232 | #ifndef NDEBUG |
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| 233 | //decompress and compare the start and the decompressed data |
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[1907] | 234 | uint8_t *rdata = new uint8_t[HEADER->datasize+sizeof(GamestateHeader)]; |
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| 235 | uint8_t *d2 = GAMESTATE_START(rdata); |
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| 236 | uLongf length2 = HEADER->datasize; |
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[1751] | 237 | uncompress(d2, &length2, dest, buffer); |
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[1907] | 238 | for(unsigned int i=0; i<HEADER->datasize; i++){ |
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[1751] | 239 | assert(*(source+i)==*(d2+i)); |
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| 240 | } |
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| 241 | delete[] rdata; |
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| 242 | #endif |
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[1701] | 243 | |
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| 244 | //copy and modify header |
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[1751] | 245 | #ifndef NDEBUG |
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[1907] | 246 | HEADER->crc32 = calcCRC(data_+sizeof(GamestateHeader), HEADER->datasize); |
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[1751] | 247 | #endif |
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[1701] | 248 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 249 | //delete old data |
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| 250 | delete[] data_; |
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| 251 | //save new data |
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| 252 | data_ = ndata; |
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[1751] | 253 | HEADER->compsize = buffer; |
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| 254 | HEADER->compressed = true; |
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[1730] | 255 | assert(HEADER->compressed); |
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[2041] | 256 | COUT(4) << "gamestate compress datasize: " << HEADER->datasize << " compsize: " << HEADER->compsize << std::endl; |
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[1701] | 257 | return true; |
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| 258 | } |
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| 259 | bool Gamestate::decompressData() |
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| 260 | { |
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[1751] | 261 | assert(HEADER); |
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[1715] | 262 | assert(HEADER->compressed); |
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[2041] | 263 | COUT(4) << "GameStateClient: uncompressing gamestate. id: " << HEADER->id << ", baseid: " << HEADER->base_id << ", datasize: " << HEADER->datasize << ", compsize: " << HEADER->compsize << std::endl; |
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[1907] | 264 | unsigned int datasize = HEADER->datasize; |
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[1751] | 265 | unsigned int compsize = HEADER->compsize; |
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| 266 | unsigned int bufsize; |
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[1990] | 267 | // assert(compsize<=datasize); |
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[1907] | 268 | bufsize = datasize; |
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[1751] | 269 | assert(bufsize!=0); |
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[1907] | 270 | uint8_t *ndata = new uint8_t[bufsize + sizeof(GamestateHeader)]; |
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| 271 | uint8_t *dest = ndata + sizeof(GamestateHeader); |
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| 272 | uint8_t *source = data_ + sizeof(GamestateHeader); |
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[1701] | 273 | int retval; |
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[1751] | 274 | uLongf length=bufsize; |
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| 275 | retval = uncompress( dest, &length, source, (uLong)compsize ); |
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[1701] | 276 | switch ( retval ) { |
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| 277 | case Z_OK: COUT(5) << "successfully decompressed" << std::endl; break; |
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| 278 | case Z_MEM_ERROR: COUT(1) << "not enough memory available" << std::endl; return false; |
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| 279 | case Z_BUF_ERROR: COUT(2) << "not enough memory available in the buffer" << std::endl; return false; |
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| 280 | case Z_DATA_ERROR: COUT(2) << "data corrupted (zlib)" << std::endl; return false; |
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| 281 | } |
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[1751] | 282 | #ifndef NDEBUG |
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[1907] | 283 | assert(HEADER->crc32==calcCRC(ndata+sizeof(GamestateHeader), HEADER->datasize)); |
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[1751] | 284 | #endif |
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[1752] | 285 | |
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[1701] | 286 | //copy over the header |
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| 287 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 288 | //delete old (compressed data) |
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[1712] | 289 | delete[] data_; |
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[1751] | 290 | //set new pointers |
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[1701] | 291 | data_ = ndata; |
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[1751] | 292 | HEADER->compressed = false; |
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[1907] | 293 | assert(HEADER->datasize==datasize); |
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[1751] | 294 | assert(HEADER->compsize==compsize); |
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[1701] | 295 | return true; |
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| 296 | } |
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| 297 | |
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| 298 | Gamestate *Gamestate::diff(Gamestate *base) |
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| 299 | { |
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[1751] | 300 | assert(HEADER); |
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| 301 | assert(!HEADER->compressed); |
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| 302 | assert(!HEADER->diffed); |
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[1701] | 303 | //unsigned char *basep = base->getGs()/*, *gs = getGs()*/; |
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[1907] | 304 | uint8_t *basep = GAMESTATE_START(base->data_), *gs = GAMESTATE_START(this->data_); |
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[1701] | 305 | unsigned int of=0; // pointers offset |
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| 306 | unsigned int dest_length=0; |
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[1907] | 307 | dest_length=HEADER->datasize; |
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[1701] | 308 | if(dest_length==0) |
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| 309 | return NULL; |
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[1907] | 310 | uint8_t *ndata = new uint8_t[dest_length*sizeof(uint8_t)+sizeof(GamestateHeader)]; |
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| 311 | uint8_t *dest = ndata + sizeof(GamestateHeader); |
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| 312 | while(of < GAMESTATE_HEADER(base->data_)->datasize && of < HEADER->datasize){ |
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[1701] | 313 | *(dest+of)=*(basep+of)^*(gs+of); // do the xor |
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| 314 | ++of; |
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| 315 | } |
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[1907] | 316 | if(GAMESTATE_HEADER(base->data_)->datasize!=HEADER->datasize){ |
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| 317 | uint8_t n=0; |
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| 318 | if(GAMESTATE_HEADER(base->data_)->datasize < HEADER->datasize){ |
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[1701] | 319 | while(of<dest_length){ |
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| 320 | *(dest+of)=n^*(gs+of); |
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| 321 | of++; |
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| 322 | } |
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| 323 | } |
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| 324 | } |
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| 325 | |
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[1715] | 326 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 327 | GAMESTATE_HEADER(ndata)->diffed = true; |
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[1751] | 328 | GAMESTATE_HEADER(ndata)->base_id = base->getID(); |
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| 329 | Gamestate *g = new Gamestate(ndata, getClientID()); |
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| 330 | g->flags_=flags_; |
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| 331 | g->packetDirection_ = packetDirection_; |
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[1701] | 332 | return g; |
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| 333 | } |
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| 334 | |
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[1907] | 335 | Gamestate* Gamestate::doSelection(unsigned int clientID){ |
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| 336 | assert(data_); |
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| 337 | std::map<unsigned int, Synchronisable *>::iterator it; |
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[2031] | 338 | |
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[1907] | 339 | // allocate memory for new data |
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| 340 | uint8_t *gdata = new uint8_t[HEADER->datasize+sizeof(GamestateHeader)]; |
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| 341 | // create a gamestate out of it |
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| 342 | Gamestate *gs = new Gamestate(gdata); |
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| 343 | uint8_t *newdata = gdata + sizeof(GamestateHeader); |
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| 344 | uint8_t *origdata = GAMESTATE_START(data_); |
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[2031] | 345 | |
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[1907] | 346 | //copy the GamestateHeader |
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| 347 | *(GamestateHeader*)gdata = *HEADER; |
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[2031] | 348 | |
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[1907] | 349 | synchronisableHeader *oldobjectheader, *newobjectheader; |
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| 350 | unsigned int objectOffset; |
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[2031] | 351 | |
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[1907] | 352 | //copy in the zeros |
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| 353 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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| 354 | oldobjectheader = (synchronisableHeader*)origdata; |
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| 355 | newobjectheader = (synchronisableHeader*)newdata; |
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| 356 | unsigned int objectsize = oldobjectheader->size; |
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| 357 | assert(it->second->objectID==oldobjectheader->objectID); |
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| 358 | *newobjectheader = *oldobjectheader; |
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| 359 | objectOffset=sizeof(uint8_t)+sizeof(bool); //skip the size and the availableDate variables in the objectheader |
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| 360 | if(it->second->doSelection(HEADER->id)){ |
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| 361 | newobjectheader->dataAvailable=true; //TODO: probably not neccessary |
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| 362 | while(objectOffset<objectsize){ |
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| 363 | *(newdata + objectOffset)=*(origdata + objectOffset); // copy the data |
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| 364 | objectOffset++; |
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| 365 | } |
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| 366 | }else{ |
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| 367 | newobjectheader->dataAvailable=false; |
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| 368 | while(objectOffset<objectsize){ |
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| 369 | *(newdata+objectOffset)=0; // set to 0 |
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| 370 | objectOffset++; |
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| 371 | } |
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| 372 | assert(objectOffset==objectsize); |
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| 373 | } |
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| 374 | newdata += objectsize; |
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| 375 | origdata += objectsize; |
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| 376 | } |
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| 377 | return gs; |
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| 378 | } |
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| 379 | |
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| 380 | |
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| 381 | Gamestate* Gamestate::intelligentDiff(Gamestate *base, unsigned int clientID){ |
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| 382 | // asserts |
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| 383 | assert(data_); |
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| 384 | assert(base->data_); |
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| 385 | assert(!GAMESTATE_HEADER(base->data_)->diffed); |
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| 386 | assert(!GAMESTATE_HEADER(base->data_)->compressed); |
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| 387 | assert(!HEADER->compressed); |
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| 388 | assert(!HEADER->diffed); |
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[2031] | 389 | |
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[1907] | 390 | //preparations |
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| 391 | std::map<unsigned int, Synchronisable *>::iterator it; |
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| 392 | uint8_t *origdata, *basedata, *destdata, *ndata; |
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| 393 | unsigned int objectOffset, streamOffset=0; //data offset |
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[2031] | 394 | unsigned int minsize = (HEADER->datasize < GAMESTATE_HEADER(base->data_)->datasize) ? HEADER->datasize : GAMESTATE_HEADER(base->data_)->datasize; |
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[1907] | 395 | synchronisableHeader *origheader; |
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| 396 | synchronisableHeader *destheader; |
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[2031] | 397 | |
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[1907] | 398 | origdata = GAMESTATE_START(this->data_); |
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| 399 | basedata = GAMESTATE_START(base->data_); |
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| 400 | ndata = new uint8_t[HEADER->datasize + sizeof(GamestateHeader)]; |
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| 401 | destdata = ndata + sizeof(GamestateHeader); |
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[2031] | 402 | |
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[1907] | 403 | // do the diff |
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| 404 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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| 405 | assert(streamOffset<HEADER->datasize); |
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| 406 | bool sendData = it->second->doSelection(HEADER->id); |
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| 407 | origheader = (synchronisableHeader *)(origdata+streamOffset); |
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| 408 | destheader = (synchronisableHeader *)(destdata+streamOffset); |
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[2031] | 409 | |
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[1907] | 410 | //copy and partially diff the object header |
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| 411 | assert(sizeof(synchronisableHeader)==3*sizeof(unsigned int)+sizeof(bool)); |
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| 412 | *(uint32_t*)destdata = *(uint32_t*)origdata; //size (do not diff) |
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| 413 | *(bool*)(destdata+sizeof(uint32_t)) = sendData; |
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| 414 | if(sendData){ |
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| 415 | *(uint32_t*)(destdata+sizeof(uint32_t)+sizeof(bool)) = *(uint32_t*)(basedata+sizeof(uint32_t)+sizeof(bool)) ^ *(uint32_t*)(origdata+sizeof(uint32_t)+sizeof(bool)); //objectid (diff it) |
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| 416 | *(uint32_t*)(destdata+2*sizeof(uint32_t)+sizeof(bool)) = *(uint32_t*)(basedata+2*sizeof(uint32_t)+sizeof(bool)) ^ *(uint32_t*)(origdata+2*sizeof(uint32_t)+sizeof(bool)); //classid (diff it) |
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| 417 | }else{ |
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| 418 | *(uint32_t*)(destdata+sizeof(uint32_t)+sizeof(bool)) = 0; |
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[2031] | 419 | *(uint32_t*)(destdata+2*sizeof(uint32_t)+sizeof(bool)) = 0; |
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[1907] | 420 | } |
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| 421 | objectOffset=sizeof(synchronisableHeader); |
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| 422 | streamOffset+=sizeof(synchronisableHeader); |
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[2031] | 423 | |
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[1907] | 424 | //now handle the object data or fill with zeros |
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| 425 | while(objectOffset<origheader->size ){ |
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[2031] | 426 | |
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[1907] | 427 | if(sendData && streamOffset<minsize) |
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| 428 | *(destdata+objectOffset)=*(basedata+objectOffset)^*(origdata+objectOffset); // do the xor |
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| 429 | else if(sendData) |
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| 430 | *(destdata+objectOffset)=((uint8_t)0)^*(origdata+objectOffset); // xor with 0 (basestream is too short) |
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| 431 | else |
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| 432 | *(destdata+objectOffset)=0; // set to 0 because this object should not be transfered |
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[2031] | 433 | |
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[1907] | 434 | objectOffset++; |
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| 435 | streamOffset++; |
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| 436 | } |
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| 437 | destdata+=objectOffset; |
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| 438 | origdata+=objectOffset; |
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| 439 | basedata+=objectOffset; |
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| 440 | } |
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[2031] | 441 | |
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[1907] | 442 | //copy over the gamestate header and set the diffed flag |
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| 443 | *(GamestateHeader *)ndata = *HEADER; //copy over the header |
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| 444 | Gamestate *gs = new Gamestate(ndata); |
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| 445 | GAMESTATE_HEADER(ndata)->diffed=true; |
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| 446 | return gs; |
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| 447 | } |
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| 448 | |
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| 449 | Gamestate* Gamestate::intelligentUnDiff(Gamestate *base){ |
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| 450 | // asserts |
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| 451 | assert(data_); |
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| 452 | assert(base->data_); |
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| 453 | assert(!GAMESTATE_HEADER(base->data_)->diffed); |
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| 454 | assert(!GAMESTATE_HEADER(base->data_)->compressed); |
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| 455 | assert(!HEADER->compressed); |
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| 456 | assert(HEADER->diffed); |
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[2031] | 457 | |
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[1907] | 458 | //preparations |
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| 459 | std::map<unsigned int, Synchronisable *>::iterator it; |
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| 460 | uint8_t *origdata, *basedata, *destdata, *ndata; |
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| 461 | unsigned int objectOffset, streamOffset=0; //data offset |
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[2031] | 462 | unsigned int minsize = (HEADER->datasize < GAMESTATE_HEADER(base->data_)->datasize) ? HEADER->datasize : GAMESTATE_HEADER(base->data_)->datasize; |
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[1907] | 463 | synchronisableHeader *origheader; |
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| 464 | synchronisableHeader *destheader; |
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[2031] | 465 | |
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[1907] | 466 | origdata = GAMESTATE_START(this->data_); |
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| 467 | basedata = GAMESTATE_START(base->data_); |
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| 468 | ndata = new uint8_t[HEADER->datasize + sizeof(GamestateHeader)]; |
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| 469 | destdata = ndata + sizeof(GamestateHeader); |
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[2031] | 470 | |
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[1907] | 471 | // do the undiff |
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| 472 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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| 473 | assert(streamOffset<HEADER->datasize); |
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| 474 | origheader = (synchronisableHeader *)(origdata+streamOffset); |
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| 475 | destheader = (synchronisableHeader *)(destdata+streamOffset); |
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| 476 | bool sendData; |
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[2031] | 477 | |
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[1907] | 478 | //copy and partially diff the object header |
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| 479 | assert(sizeof(synchronisableHeader)==3*sizeof(unsigned int)+sizeof(bool)); |
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| 480 | *(unsigned int*)destdata = *(unsigned int*)origdata; //size (do not diff) |
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| 481 | *(bool*)(destdata+sizeof(unsigned int)) = *(bool*)(origdata+sizeof(unsigned int)); |
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| 482 | sendData = *(bool*)(origdata+sizeof(unsigned int)); |
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| 483 | if(sendData){ |
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| 484 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+sizeof(unsigned int)+sizeof(bool)); //objectid (diff it) |
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| 485 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+2*sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+2*sizeof(unsigned int)+sizeof(bool)); //classid (diff it) |
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| 486 | }else{ |
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| 487 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = 0; |
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[2031] | 488 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = 0; |
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[1907] | 489 | } |
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| 490 | objectOffset=sizeof(synchronisableHeader); |
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| 491 | streamOffset+=sizeof(synchronisableHeader); |
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[2031] | 492 | |
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[1907] | 493 | //now handle the object data or fill with zeros |
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| 494 | while(objectOffset<origheader->size ){ |
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[2031] | 495 | |
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[1907] | 496 | if(sendData && streamOffset<minsize) |
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| 497 | *(destdata+objectOffset)=*(basedata+objectOffset)^*(origdata+objectOffset); // do the xor |
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| 498 | else if(sendData) |
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| 499 | *(destdata+objectOffset)=((unsigned char)0)^*(origdata+objectOffset); // xor with 0 (basestream is too short) |
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| 500 | else |
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| 501 | *(destdata+objectOffset)=0; // set to 0 because this object should not be transfered |
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[2031] | 502 | |
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[1907] | 503 | objectOffset++; |
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| 504 | streamOffset++; |
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| 505 | } |
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| 506 | destdata+=objectOffset; |
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| 507 | origdata+=objectOffset; |
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| 508 | basedata+=objectOffset; |
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| 509 | } |
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[2031] | 510 | |
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[1907] | 511 | //copy over the gamestate header and set the diffed flag |
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| 512 | *(GamestateHeader *)ndata = *HEADER; //copy over the header |
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| 513 | Gamestate *gs = new Gamestate(ndata); |
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| 514 | GAMESTATE_HEADER(ndata)->diffed=false; |
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| 515 | return gs; |
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| 516 | } |
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| 517 | |
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[1701] | 518 | Gamestate *Gamestate::undiff(Gamestate *base) |
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| 519 | { |
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[1751] | 520 | assert(this && base);assert(HEADER); |
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| 521 | assert(HEADER->diffed); |
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[1715] | 522 | assert(!HEADER->compressed && !GAMESTATE_HEADER(base->data_)->compressed); |
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[1701] | 523 | //unsigned char *basep = base->getGs()/*, *gs = getGs()*/; |
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[1907] | 524 | uint8_t *basep = GAMESTATE_START(base->data_); |
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| 525 | uint8_t *gs = GAMESTATE_START(this->data_); |
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[1701] | 526 | unsigned int of=0; // pointers offset |
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| 527 | unsigned int dest_length=0; |
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[1907] | 528 | dest_length=HEADER->datasize; |
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[1701] | 529 | if(dest_length==0) |
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| 530 | return NULL; |
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[1907] | 531 | uint8_t *ndata = new uint8_t[dest_length*sizeof(uint8_t)+sizeof(GamestateHeader)]; |
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| 532 | uint8_t *dest = ndata + sizeof(GamestateHeader); |
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| 533 | while(of < GAMESTATE_HEADER(base->data_)->datasize && of < HEADER->datasize){ |
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[1701] | 534 | *(dest+of)=*(basep+of)^*(gs+of); // do the xor |
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| 535 | ++of; |
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| 536 | } |
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[1907] | 537 | if(GAMESTATE_HEADER(base->data_)->datasize!=HEADER->datasize){ |
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| 538 | uint8_t n=0; |
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| 539 | if(GAMESTATE_HEADER(base->data_)->datasize < HEADER->datasize){ |
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[1701] | 540 | while(of < dest_length){ |
---|
| 541 | *(dest+of)=n^*(gs+of); |
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| 542 | of++; |
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| 543 | } |
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| 544 | } |
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| 545 | } |
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[1715] | 546 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 547 | GAMESTATE_HEADER(ndata)->diffed = false; |
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[1751] | 548 | Gamestate *g = new Gamestate(ndata, getClientID()); |
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| 549 | g->flags_=flags_; |
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| 550 | g->packetDirection_ = packetDirection_; |
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| 551 | assert(!g->isDiffed()); |
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| 552 | assert(!g->isCompressed()); |
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[1701] | 553 | return g; |
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| 554 | } |
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| 555 | |
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| 556 | |
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[1751] | 557 | unsigned int Gamestate::calcGamestateSize(unsigned int id, int mode) |
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[1701] | 558 | { |
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| 559 | int size=0; |
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| 560 | // get the start of the Synchronisable list |
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[1747] | 561 | orxonox::ObjectList<Synchronisable>::iterator it; |
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[1701] | 562 | // get total size of gamestate |
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[1747] | 563 | for(it = orxonox::ObjectList<Synchronisable>::begin(); it; ++it) |
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[1907] | 564 | size+=it->getSize(id, mode); // size of the actual data of the synchronisable |
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[1701] | 565 | // size+=sizeof(GamestateHeader); |
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| 566 | return size; |
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| 567 | } |
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| 568 | |
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| 569 | /** |
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| 570 | * This function removes a Synchronisable out of the universe |
---|
| 571 | * @param it iterator of the list pointing to the object |
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| 572 | * @return iterator pointing to the next object in the list |
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| 573 | */ |
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[1747] | 574 | void Gamestate::removeObject(orxonox::ObjectList<Synchronisable>::iterator &it) { |
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| 575 | orxonox::ObjectList<Synchronisable>::iterator temp=it; |
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[1701] | 576 | ++it; |
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| 577 | delete *temp; |
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| 578 | } |
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| 579 | |
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[1712] | 580 | bool Gamestate::isDiffed(){ |
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| 581 | return HEADER->diffed; |
---|
| 582 | } |
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[1740] | 583 | |
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[1751] | 584 | bool Gamestate::isCompressed(){ |
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| 585 | return HEADER->compressed; |
---|
| 586 | } |
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[1752] | 587 | |
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[1712] | 588 | int Gamestate::getBaseID(){ |
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| 589 | return HEADER->base_id; |
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| 590 | } |
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[1701] | 591 | } |
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| 592 | |
---|
| 593 | } |
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