SOP_Cache.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        SOP_Cache.h ( SOP Library, C++)
 *
 * COMMENTS:
 */

#ifndef __SOP_Cache__
#define __SOP_Cache__

#include "SOP_API.h"
#include "SOP_Node.h"
#include <UT/UT_Map.h>
#include <utility>

class UT_InfoTree;
class CH_Manager;

class SOP_API SOP_Cache : public SOP_Node, public OP_NotifyVarChange
{
public:
             SOP_Cache(OP_Network *net, const char *name, OP_Operator *entry);
            ~SOP_Cache() override;

    static OP_Node              *myConstructor(OP_Network *net,
                                               const char *name,
                                               OP_Operator *entry);

    static const UT_StringHolder theSOPTypeName;

    static PRM_Template          myTemplateList[];

    void                         getNodeSpecificInfoText(
                                        OP_Context &context,
                                        OP_NodeInfoParms &iparms) override;
    
    // Fill in tree with this node's details
    void                         fillInfoTreeNodeSpecific(
                                        UT_InfoTree &tree, 
                                        const OP_NodeInfoTreeParms &parms
                                        ) override;

    bool                         unloadData() override;
    int64                        getLoadedMemoryUsage() const override;

    int64                        getCacheRemoveSerial() const
                                 { return myRemoveSerial; }

    bool                         updateParmsFlags() override;
    void                         syncNodeVersion(
                                        const char *old_version,
                                        const char *cur_version,
                                        bool *node_deleted) override;


    static fpreal roundTime(fpreal current_t);

    void pruneCache(exint maxframes, fpreal current_t);

    /// NOTE: This MUST NOT be named "clearCache", because there's a virtual
    ///       function on OP_Node with that name!
    void clearCacheSopCache();

    void                 makePreserveRequest() override;

    const SOP_NodeVerb*  cookVerb() const override;

    bool opNotifyVarChange(
        const char *varname,
        OP_NodeList *changed_nodes = nullptr) override;

protected:
    OP_ERROR             cookMySop(OP_Context &context) override;
    void                 setInstance(GU_DetailHandle *igdh);
    int                  isRefInput(OP_InputIdx i) const override;
    const char          *inputLabel(OP_InputIdx idx) const override;

private:
    bool                ANYFRAME()              { return evalInt("anyframe", 0, 0) != 0; }
    int                 MAXFRAMES(fpreal t)     { return evalInt("maxframes",0, t); }
    bool                CLEARONCHANGE(fpreal t) { return evalInt("clearonchange", 0, t) != 0; }

    int                 START(fpreal t)         { return evalInt("range", 0, t); }
    int                 END(fpreal t)           { return evalInt("range", 1, t); }
    int                 INC(fpreal t)           { return evalInt("range", 2, t); }

    fpreal              INDEX(fpreal t)         { return evalFloat("index", 0, t); }
    void                PARAM(UT_String &str)   { evalString(str, "param", 0, 0); }

    int                 INDEXTIME()             { return evalInt("indextime", 0, 0); }

    int                 LOADMETHOD()            { return evalInt("loadmethod", 0, 0); }

//  int                 LOAD()                  { return evalInt("reload", 0, 0); }
//  int                 RESET()                 { return evalInt("clear", 0, 0); }

    bool                CACHEPOINTS()           { return evalInt("cachepoints", 0, 0) != 0; }
    bool                BLENDPOS()              { return evalInt("blendpos", 0, 0) != 0; }

    void                 clearGDPLists();
    void                 clearGDPList(fpreal t);

    void                 loadLocalGeometry(fpreal t, bool cache_points, int ind,
                                           int check_merge = 0);
    GU_DetailHandle     *getLocalGeometry(fpreal t, bool cache_points, int ind,
                                          int check_merge = 0);

    static int           preLoadLocalCache(void *data, int index, fpreal t,
                                            const PRM_Template *);
    static int           preClearLocalCache(void *data, int index, fpreal t,
                                            const PRM_Template *);
    static int           preClearLocalCacheFrame(void *data, int index, fpreal t,
                                                 const PRM_Template *);

    void                 blendGDP(fpreal t, bool cache_points, fpreal index);
    void                 setGDP(fpreal t, bool cache_points, int i0);

    const GU_Detail     *getLocalInput(fpreal t, fpreal val, const char *param,
                                       CH_Manager *cman);

    void                 getRange(int &start, int &end, int &inc, fpreal t);

    void                 shiftCache(int start, int end, int inc);

    /// This maps from frame time to detail.  Each detail has an
    /// integer that indicates the cache access count when
    /// it was last accessed.
    /// When removing one item from the cache, the minimum integer is
    /// found and removed. When removing everything (or all but one)
    /// from the cache, it's easily cleared.  Otherwise, the items
    /// are sorted for removal.
    UT_Map<fpreal, std::pair<GU_DetailHandle *,exint> > myCache;

    /// This is a cache access count, used for tracking age in myCache.
    exint myCacheAccessCount;

    /// Cache whether any of the cooks in the cache have been time dependent.
    bool myTimeDep;

    int                 myCacheStart;
    int                 myCacheEnd;
    int                 myCacheInc;
    int                 myTotal;

    UT_Array<GU_DetailHandle *>  myGDPLists;
    fpreal                       myLastIndex;
    int64                        myCachedMemoryUsage;

    int64                        myRemoveSerial;
    int                          myLastRefInputId;
    int                          myLastRefInputModVer;

    bool                         myPreserveRequest;
};

#endif