segmentation.cpp

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/*
  Segmentation  -  Partitioning of a timeline for organising the render graph.

  Copyright (C)         Lumiera.org
    2023,               Hermann Vosseler <Ichthyostega@web.de>

  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., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


#include "lib/error.hpp"
#include "steam/fixture/segmentation.hpp"
#include "lib/time/timevalue.hpp"
#include "lib/split-splice.hpp"

using lib::time::Time;
using lib::time::TimeSpan;


namespace steam {
namespace fixture {
  
  namespace error = lumiera::error;
  
  
  Segmentation::~Segmentation() { }   // emit VTable here...
  
  
  namespace {// Implementation details...
    
    
  }//(End) impl
  
  
  
  Segment const&
  Segmentation::splitSplice (OptTime start, OptTime after, engine::ExitNodes&& modelLink)
  {
    ASSERT (!start or !after or start != after);
    using Iter = typename list<Segment>::iterator;
    
    auto getStart =  [](Iter elm)                                   -> Time { return elm->start(); };
    auto getAfter =  [](Iter elm)                                   -> Time { return elm->after(); };
    auto createSeg= [&](Iter pos, Time start, Time after)           -> Iter { return segments_.emplace (pos, TimeSpan{start, after}, move(modelLink)); };
    auto emptySeg = [&](Iter pos, Time start, Time after)           -> Iter { return segments_.emplace (pos, TimeSpan{start, after}); };
    auto cloneSeg = [&](Iter pos, Time start, Time after, Iter src) -> Iter { return segments_.emplace (pos, *src, TimeSpan{start, after}); };
    auto discard  = [&](Iter pos, Iter after)                       -> Iter { return segments_.erase (pos,after); };
    
    
    lib::splitsplice::Algo splicer{ getStart
                                  , getAfter
                                  , createSeg
                                  , emptySeg
                                  , cloneSeg
                                  , discard
                                  , Time::NEVER
                                  , segments_.begin(),segments_.end()
                                  , start,after
                                  };
    splicer.determineRelations();
    auto [s,n,e] = splicer.performSplitSplice();
    return *n;
  }
  
  
  
}} // namespace steam::fixture