/* ----------------------------------------------------------- *//*                                                             *//*                          ___                                *//*                       |_| | |_/   SPEECH                    *//*                       | | | | \   RECOGNITION               *//*                       =========   SOFTWARE                  */ /*                                                             *//*                                                             *//* ----------------------------------------------------------- *//* developed at:                                               *//*                                                             *//*      Speech Vision and Robotics group                       *//*      Cambridge University Engineering Department            *//*      http://svr-www.eng.cam.ac.uk/                          *//*                                                             *//* ----------------------------------------------------------- *//*         Copyright:                                          *//*         2001-2002  Cambridge University                     *//*                    Engineering Department                   *//*                                                             *//*   Use of this software is governed by a License Agreement   *//*    ** See the file License for the Conditions of Use  **    *//*    **     This banner notice must not be removed      **    *//*                                                             *//* ----------------------------------------------------------- *//*       File: HLat.h:  Lattice Manipulation                   *//* ----------------------------------------------------------- *//* !HVER!HLat:   3.2 [CUED 09/12/02] */#ifndef _HLAT_H_#define _HLAT_H_#ifdef __cplusplusextern "C" {#endif/* ------------------------ Initialisation --------------------------- */void InitLat (void);/*   register module & set configuration parameters*//* ------------------------ Datatype ----------------------------- *//* Forward-Backward info structre attached to LNodes     use doubles for imporved accuracy*/typedef struct FBlnodeInfo {   LogDouble fwlike;     /* forward likelihood */   LogDouble bwlike;     /* backward likelihood */} FBinfo;#define LNodeFw(ln)  (((FBinfo *) (ln)->hook)->fwlike)#define LNodeBw(ln)  (((FBinfo *) (ln)->hook)->bwlike)typedef enum {LATFB_SUM, LATFB_MAX} LatFBType;/* ------------------------ Prototypes --------------------------- */Transcription *LatFindBest (MemHeap *heap, Lattice *lat, int N);Lattice *LatPrune (MemHeap *heap, Lattice *lat, LogDouble thresh, float arcsPerSec);void CalcStats (Lattice *lat);LNode *LatStartNode (Lattice *lat);LNode *LatEndNode (Lattice *lat);void LatSetBoundaryWords (char *start, char *end, char  *startLM, char *endLM);void LatCheck (Lattice *lat);void FixBadLat (Lattice *lat);void FixPronProbs (Lattice *lat, Vocab *voc);Boolean LatTopSort (Lattice *lat, LNode **topOrder);void LatAttachInfo (MemHeap *heap, size_t size, Lattice *lat);void LatDetachInfo (MemHeap *heap, Lattice *lat);LogDouble LatForwBackw (Lattice *lat, LatFBType type);#ifndef NO_LAT_LMLattice *LatExpand (MemHeap *heap, Lattice *lat, LModel *lm);#endif#ifdef __cplusplus}#endif#endif  /* _HLAT_H_ */