C
C++*********************************************************************
C
C FMRS_2R.F                     private(j)          OCT 01 ARDEAN LEITH
 
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  Order of elements:
C
C--*********************************************************************

         SUBROUTINE  FMRS_2R(X,NNNN,NSAM,NROW,INV)

         DIMENSION  X(NNNN,NROW)

	INS=INV*NNNN

        IF (INV .GE. 0)  THEN
c$omp      parallel do private(i),shared(invt) 
	   DO I=1,NROW
	      INVT = INV
	      CALL FMRS_1(X(1,I),NSAM,INVT)
	   ENDDO
           IF (INVT .LE. 0)  THEN
	      INV = INVT
	      RETURN
	   ENDIF
	ENDIF

c$omp   parallel do private(i),shared(invt) 
        DO I=1,NNNN,2
	   INVT = INS
	   CALL FFTMCF(X(I,1),X(I+1,1),NROW,NROW,NROW,INVT)
	ENDDO

        IF (INVT.EQ.0)  THEN
	   INV = 0
	   RETURN
	ENDIF
	IF (INV.GT.0)  RETURN

C       NORMALIZE FOR INVERSE
        Q = 1.0/FLOAT(NROW)
c$omp   parallel do private(i,j)
        DO J=1,NROW
           DO I=1,NNNN
              X(I,J)=X(I,J)*Q
	   ENDDO
	ENDDO 

c$omp   parallel do private(i),shared(invt) 
	DO I=1,NROW
	   INVT=INV
	   CALL  FMRS_1(X(1,I),NSAM,INVT)
	ENDDO

        IF(INVT.LE.0)  INV=INVT

        END