C++*********************************************************************
C
C MACF.F
C
C **********************************************************************
C=* FROM: SPIDER - MODULAR IMAGE PROCESSING SYSTEM.   AUTHOR: J.FRANK  *
C=* Copyright (C) 1985-2005  Health Research Inc.                      *
C=*                                                                    *
C=* HEALTH RESEARCH INCORPORATED (HRI),                                *   
C=* ONE UNIVERSITY PLACE, RENSSELAER, NY 12144-3455.                   *
C=*                                                                    *
C=* Email:  spider@wadsworth.org                                       *
C=*                                                                    *
C=* This program is free software; you can redistribute it and/or      *
C=* modify it under the terms of the GNU General Public License as     *
C=* published by the Free Software Foundation; either version 2 of the *
C=* License, or (at your option) any later version.                    *
C=*                                                                    *
C=* This program is distributed in the hope that it will be useful,    *
C=* but WITHOUT ANY WARRANTY; without even the implied warranty of     *
C=* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
C=* General Public License for more details.                           *
C=*                                                                    *
C=* You should have received a copy of the GNU General Public License  *
C=* along with this program; if not, write to the                      *
C=* Free Software Foundation, Inc.,                                    *
C=* 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.      *
C=*                                                                    *
C **********************************************************************
C
C IMAGE_PROCESSING_ROUTINE
C
C23456789012345678901234567890123456789012345678901234567890123456789012
C--*********************************************************************

        SUBROUTINE MACF(MODE)
        
        INCLUDE 'CMBLOCK.INC'
        REAL, ALLOCATABLE, DIMENSION(:,:) :: X

        CHARACTER *81 FILNAM
        CHARACTER *1  NULL,ASK,MODE

        DATA  LUN1,LUN2/8,9/

        NULL = CHAR(0)

C       MASKED AUTOCORELATION FUNCTION
        MAXIM = 0
        CALL OPFILEC(0,.TRUE.,FILNAM,LUN1,'O',ITYPE,NSAM,NROW,NSLICE,
     &             MAXIM,'INPUT',.TRUE.,IRTFLG)
        IF (IRTFLG .EQ. -1) RETURN

        IF (ITYPE .NE. 1) GOTO 145

        CALL FILERD(FILNAM,NLETO,NULL,'OUTPUT',IRTFLG)
        IF (IRTFLG .EQ. -1) GOTO 5
        
        CALL RDPRMI(IRA,IDUM,NOT_USED,'MASK RADIUS')
        IF (IRA.LT.2.OR.IRA.GT.NSAM/2.OR.IRA.GT.NROW/2)  THEN
           CALL  ERRT(31,'MACF  ',NE)
           GOTO  5
        ENDIF

	LSD=2*NSAM+2-MOD(2*NSAM,2)

        KB=1+2*LSD*NROW
C
        CALL  RDPRMC(ASK,NCHAR,.TRUE.,
     &            '(F)ULL OR (H)ALF OUTPUT (F/H)',NULL,IRTFLG)
       
        IF (ASK .EQ. 'H')  THEN
 	   MAXIM = 0
	   CALL OPFILEC(LUN1,.FALSE.,FILNAM,LUN2,'U',ITYPE,
     &                NSAM,NROW,1,MAXIM, ' ',.FALSE.,NF)
           GOTO (130,951),NF
     
        ELSEIF(ASK.EQ.'F')  THEN

	   MAXIM = 0
	   CALL OPFILEC(LUN1,.FALSE.,FILNAM,LUN2,'U',ITYPE,
     &          2*NSAM,2*NROW,1, MAXIM,' ',.FALSE.,NF)

           GOTO (130,951),NF
       ELSE
          CALL  ERRT(31,'MACF  ',NE)
          GOTO  5
       ENDIF

951 	ALLOCATE (X(LSD,2*NROW), STAT=IRTFLG)
        IF (IRTFLG.NE.0) THEN 
           CALL ERRT(46,'AC MS, X',IER)
           GOTO 5
        ENDIF

        NSAM1 = LSD
	NROW1 = 2*NROW
       
        CALL READV(LUN1,X,NSAM1,NROW1,NSAM,NROW,NSLICE)


        CALL  MACF_P(NSAM,NROW,X,LSD,IRA,ASK,MODE)
     
        NS2=NSAM/2+1
        NR2=NROW/2+1    
 
        NSAM1 = LSD
	NROW1 = 2*NROW

   	IF (ASK .EQ. 'F')  THEN
           CALL WRITEV(LUN2,X,NSAM1,NROW1,2*NSAM,2*NROW,NSLICE)
        ELSE
           DO J=NR2,NROW+NR2-1
              CALL  WRTLIN(LUN2,X(NS2,J),NSAM,J-NR2+1)
	   ENDDO 
        ENDIF

        DEALLOCATE (X)
5       CLOSE(LUN1)
        CLOSE(LUN2)
        RETURN


130     CALL ERRT(4,'MACF  ',NE)
        GOTO 5

145     CALL ERRT(2,'MACF  ',NE)
        GOTO 5
        END