Graph.cpp

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#include "Graph.hpp"
#include "Node.hpp"
#include "graph/ProcessGraph.hpp"

#include <tuttle/host/ofx/OfxhImageEffectPlugin.hpp>
#include <tuttle/host/ofx/OfxhImageEffectNode.hpp>
#include <tuttle/host/ofx/attribute/OfxhClipImage.hpp>
#include <tuttle/host/graph/GraphExporter.hpp>

#include <boost/foreach.hpp>
#include <boost/algorithm/string.hpp>

#include <iostream>
#include <sstream>

namespace tuttle {
namespace host {

Graph::Graph()
{}

Graph::~Graph()
{}

InputBufferWrapper Graph::createInputBuffer()
{
        Node& node = createNode( "tuttle.inputbuffer" );
        InputBufferWrapper nodeWrapper( node );
        
        return nodeWrapper;
}

OutputBufferWrapper Graph::createOutputBuffer()
{
        Node& node = createNode( "tuttle.outputbuffer" );
        OutputBufferWrapper nodeWrapper( node );
        
        return nodeWrapper;
}

Graph::Node& Graph::createNode( const std::string& pluginName )
{
        INode* node = tuttle::host::createNode( pluginName );
        return addNode( *node );
}

Graph::Node& Graph::addNode( const NodeInit& node )
{
        return addNode( node.release() ); // transfer ownership
}

Graph::Node& Graph::addNode( INode& node )
{
        std::stringstream uniqueName;
        uniqueName << node.getLabel() << "_" << ++_instanceCount[node.getLabel()];
        node.setName( uniqueName.str() );

        std::string key( node.getName() ); // for constness
        _nodes.insert( key, &node ); // acquire the ownership
        addToInternalGraph( node );
        
        return node;
}

std::vector<INode*> Graph::addNodes( const std::vector<NodeInit>& nodes )
{
        std::vector<INode*> nodePtrs;
        BOOST_FOREACH( const NodeInit& node, nodes )
        {
                INode& newNode = addNode( node ); // tranfer nodes ownership to the graph
                nodePtrs.push_back( & newNode );
        }
        return nodePtrs;
}

std::vector<INode*> Graph::addConnectedNodes( const std::vector<NodeInit>& nodes )
{
        std::vector<INode*> nodePtrs = addNodes( nodes );
        if( nodePtrs.size() > 1 )
                connect( nodePtrs );
        return nodePtrs;
}

void Graph::renameNode( Graph::Node& node, const std::string& newUniqueName )
{
        // it's the same name, nothing to do.
        if( node.getName() == newUniqueName )
                return;
        
        TUTTLE_TLOG( TUTTLE_INFO, "Graph::renameNode: from: " << node.getName() << " -> to: " << newUniqueName );
        {
                // check if newUniqueName is not already in the graph
                NodeMap::iterator itNew = _nodes.find( newUniqueName );
                if( itNew != _nodes.end() )
                {
                        BOOST_THROW_EXCEPTION( exception::Value()
                                << exception::user() + "New node name " + quotes(newUniqueName) + " already exists." );
                }
        }
        NodeMap::iterator it = _nodes.find( node.getName() );
        if( it == _nodes.end() )
        {
                BOOST_THROW_EXCEPTION( exception::Value()
                        << exception::user() + "Node " + quotes(node.getName()) + " is not in the graph." );
        }
        
        // warning: loose all connections !!!
        removeFromInternalGraph( node );
        
        // rename the key into the map
        NodeMap::auto_type n = _nodes.release( it );
        n->setName( newUniqueName );
        std::string key( newUniqueName ); // for constness
        _nodes.insert( key, n.release() );
        
        addToInternalGraph( node );
        
        node.setName( newUniqueName );
}

void Graph::addToInternalGraph( Node& node )
{
        //TUTTLE_TLOG( TUTTLE_INFO, "Graph::addToInternalGraph: " << node.getName() );
        Vertex v( node.getName(), node );
        _graph.addVertex( v );
}

void Graph::removeFromInternalGraph( Node& node )
{
        //TUTTLE_TLOG( TUTTLE_INFO, "Graph::removeFromInternalGraph: " << node.getName() );
        const unsigned int id = _graph.getVertexDescriptor( node.getName() );
        _graph.removeVertex( id );
}

void Graph::deleteNode( Node& node )
{
        NodeMap::iterator it = _nodes.find( node.getName() );
        if( it != _nodes.end() )
        {
                BOOST_THROW_EXCEPTION( exception::Value()
                        << exception::user("Node not found.") );
        }
        removeFromInternalGraph( node );
        _nodes.erase( it ); // will delete the node
}

void Graph::connect( const std::string& outNode, const std::string& inNode, const std::string& inAttr )
{
        connect( getNode(outNode), getNode(inNode).getAttribute(inAttr) );
}

void Graph::connect( const std::list<std::string>& nodes )
{
        typedef std::list<std::string>::const_iterator ConstIterator;
        if( nodes.size() <= 1 )
                BOOST_THROW_EXCEPTION( exception::Logic()
                    << exception::user( "Needs multiple nodes to connect them together." ) );

        ConstIterator itA = nodes.begin(), itB = itA;
        ++itB;
        ConstIterator itEnd = nodes.end();
        for( ;
             itB != itEnd;
             ++itA, ++itB )
        {
                this->connect( *itA, *itB );
        }
}

void Graph::connect( const Node& outNode, const Node& inNode )
{
        connect( outNode, inNode.getSingleInputAttribute() );
}

void Graph::connect( const std::list<Node*>& nodes )
{
        typedef std::list<Node*>::const_iterator ConstIterator;
        if( nodes.size() <= 1 )
                BOOST_THROW_EXCEPTION( exception::Logic()
                    << exception::user( "Needs multiple nodes to connect them together." ) );

        ConstIterator itA = nodes.begin(), itB = itA;
        ++itB;
        ConstIterator itEnd = nodes.end();
        for( ;
             itB != itEnd;
             ++itA, ++itB )
        {
                this->connect( **itA, **itB );
        }
}

void Graph::connect( const std::vector<Node*>& nodes )
{
        typedef std::vector<Node*>::const_iterator ConstIterator;
        if( nodes.size() <= 1 )
                BOOST_THROW_EXCEPTION( exception::Logic()
                    << exception::user( "Needs multiple clips to connect them together." ) );

        ConstIterator itA = nodes.begin(), itB = itA;
        ++itB;
        ConstIterator itEnd = nodes.end();
        for( ;
             itB != itEnd;
             ++itA, ++itB )
        {
                BOOST_ASSERT( *itA != NULL );
                BOOST_ASSERT( *itB != NULL );
                
                this->connect( **itA, **itB );
        }
}

void Graph::connect( const Node& outNode, const Attribute& inAttr )
{
        _graph.connect( outNode.getName(), inAttr.getNode().getName(), inAttr.getName() );
}

void Graph::connect( const Attribute& outAttr, const Attribute& inAttr )
{
        _graph.connect( outAttr.getNode().getName(), inAttr.getNode().getName(), inAttr.getName() );
}

void Graph::unconnect( const Attribute& outAttr, const Attribute& inAttr )
{
        _graph.unconnect( outAttr.getNode().getName(), inAttr.getNode().getName(), inAttr.getName() );
}

namespace {
template<class TGraph>
inline void graphConnectClips( TGraph& graph )
{
        BOOST_FOREACH( typename TGraph::edge_descriptor ed, graph.getEdges() )
        {
                typename TGraph::Edge& edge           = graph.instance( ed );
                typename TGraph::Vertex& vertexSource = graph.sourceInstance( ed );
                typename TGraph::Vertex& vertexDest   = graph.targetInstance( ed );

                //TUTTLE_TLOG( TUTTLE_INFO, "[connectClips] " << edge );
                //TUTTLE_TLOG( TUTTLE_INFO, vertexSource << "->" << vertexDest );
                
                if( ! vertexDest.isFake() && ! vertexSource.isFake() )
                {
                        INode& sourceNode = vertexSource.getProcessNode();
                        INode& targetNode = vertexDest.getProcessNode();
                        targetNode.connect( sourceNode, targetNode.getAttribute( edge.getInAttrName() ) );
                }
        }
}
}

void Graph::init()
{
        graphConnectClips<InternalGraphImpl>( _graph );
}

void Graph::unconnect( const Node& node )
{
        _graph.clearVertex( _graph.getVertexDescriptor(node.getName()) );
}

void Graph::replaceNodeConnections( const Node& fromNode, const Node& toNode )
{
        BOOST_FOREACH( edge_descriptor e, _graph.getInEdges( _graph.getVertexDescriptor( fromNode.getName() ) ) )
        {
#ifdef DEBUG
                // The current node should have the declared input attribute.
                _graph.targetInstance(e).getProcessNode().getAttribute( _graph.instance(e).getInAttrName() );
#endif
                // Check that the new node has all needed attributes, before to start to modify the graph.
                toNode.getAttribute( _graph.instance(e).getInAttrName() );
        }
        BOOST_FOREACH( edge_descriptor e, _graph.getInEdges( _graph.getVertexDescriptor( fromNode.getName() ) ) )
        {
                // fromNode == targetInstance
                // So replace targetInstance with toNode
                connect(
                        _graph.sourceInstance(e).getProcessNode(),
                        toNode.getAttribute( _graph.instance(e).getInAttrName() ) );
        }
        BOOST_FOREACH( edge_descriptor e, _graph.getOutEdges( _graph.getVertexDescriptor( fromNode.getName() ) ) )
        {
                // fromNode == sourceInstance
                // So replace sourceInstance with toNode
                connect(
                        toNode,
                        _graph.targetInstance(e).getProcessNode().getAttribute( _graph.instance(e).getInAttrName() ) );
        }
        unconnect( fromNode );
}

std::size_t Graph::getNbInputConnections( const Node& node ) const
{
        return _graph.getInDegree( _graph.getVertexDescriptor( node.getName() ) );
}

std::size_t Graph::getNbOutputConnections( const Node& node ) const
{
        return _graph.getOutDegree( _graph.getVertexDescriptor( node.getName() ) );
}

void Graph::setup()
{
        const ComputeOptions options;
        const std::list<std::string> outputNodes;
        graph::ProcessGraph procGraph( options, *this, outputNodes );
        return procGraph.setup();
}

void Graph::setupAtTime( const OfxTime time, const NodeListArg& outputNodes )
{
        const ComputeOptions options;
        graph::ProcessGraph procGraph( options, *this, outputNodes.getNodes() );
        return procGraph.setupAtTime( time );
}

void Graph::computeGlobalHashAtTime( NodeHashContainer& outNodesHash, const OfxTime time, const NodeListArg& outputNodes )
{
        const ComputeOptions options;
        graph::ProcessGraph procGraph( options, *this, outputNodes.getNodes() );
        procGraph.computeHashAtTime( outNodesHash, time );
}

bool Graph::compute( const ComputeOptions& options )
{
        return compute( NodeListArg(), options );
}

bool Graph::compute( const NodeListArg& nodes, const ComputeOptions& options )
{
        const_cast<ComputeOptions&>(options).setReturnBuffers( false );
        
        memory::MemoryCache emptyMemoryCache;
        return compute( emptyMemoryCache, nodes, options );
}

bool Graph::compute( memory::MemoryCache& memoryCache, const ComputeOptions& options )
{
        return compute( memoryCache, NodeListArg(), options );
}

bool Graph::compute( memory::MemoryCache& memoryCache, const NodeListArg& nodes, const ComputeOptions& options )
{
#ifndef TUTTLE_PRODUCTION
        graph::exportAsDOT( "graph.dot", _graph );
#endif
        
        graph::ProcessGraph procGraph( options, *this, nodes.getNodes() );
        return procGraph.process( memoryCache );
}

std::vector<Graph::Node*> Graph::getNodesByContext( const std::string& context )
{
        std::vector<Node*> selectedNodes;
        for( NodeMap::iterator it = getNodes().begin(), itEnd = getNodes().end();
             it != itEnd;
             ++it )
        {
                try
                {
                        /// @todo tuttle: use INode here !
                        ImageEffectNode& ie = it->second->asImageEffectNode();
                        
                        if( ie.getContext() == context )
                                selectedNodes.push_back( &ie );
                }
                catch(...)
                {
                }
        }
        return selectedNodes;
}

std::vector<Graph::Node*> Graph::getNodesByPlugin( const std::string& pluginId )
{
        std::vector<Node*> selectedNodes;
        for( NodeMap::iterator it = getNodes().begin(), itEnd = getNodes().end();
             it != itEnd;
             ++it )
        {
                try
                {
                        /// @todo tuttle: use INode here !
                        ImageEffectNode& ie = it->second->asImageEffectNode();

                        if( boost::iequals( ie.getPlugin().getIdentifier(), pluginId ) )
                                selectedNodes.push_back( &ie );
                }
                catch(...)
                {
                }
        }
        return selectedNodes;
}

void Graph::exportDot( const std::string& filename, const EDotExportLevel level ) const
{
        switch( level )
        {
                case eDotExportLevelSimple:
                        graph::exportAsDOT( filename, _graph );
                        break;
                case eDotExportLevelDetailed:
                        graph::exportAsDOT( filename, _graph );
                        break;
        }
}

std::ostream& operator<<( std::ostream& os, const Graph& g )
{
        os << "Graph" << std::endl
                          << g.getGraph();
        return os;
}

}
}