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unpack_cbf.for
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SUBROUTINE UNPACK_CBF(N,CMPR,MXY,IMG)
Cf2py intent(in) N
Cf2py intent(in) CMPR
Cf2py depend(N) CMPR
Cf2py intent(in) MXY
Cf2py intent(in,out) IMG
Cf2py depend(MXY) IMG
IMPLICIT NONE
INTEGER*4 N,MXY
CHARACTER*1 CMPR(0:N-1)
INTEGER*4 IMG(0:MXY-1),BASEPIXEL
INTEGER*4 I,J,ISIZE
CHARACTER*1 C1,E1
CHARACTER*2 C2,E2
CHARACTER*4 C4,E4
INTEGER*1 IONEBYTE
INTEGER*2 ITWOBYTES
INTEGER*4 IFOURBYTES
E1 = CHAR(128)
E2 = CHAR(0)//CHAR(128)
E4 = CHAR(0)//CHAR(0)//CHAR(0)//CHAR(128)
I = 0
J = 0
BASEPIXEL = 0
DO WHILE ( I.LT.N )
C1 = CMPR(I)
ISIZE = 1
IF ( C1.EQ.E1 ) THEN
ISIZE = 2
I = I+1
C2 = CMPR(I)//CMPR(I+1)
IF ( C2.EQ.E2 ) THEN
ISIZE = 4
I = I+2
C4 = CMPR(I)//CMPR(I+1)//CMPR(I+2)//CMPR(I+3)
IF ( C4.EQ.E4 ) THEN
ISIZE = 8
I = I+4
END IF
END IF
END IF
IF ( ISIZE .EQ. 1 ) THEN
IONEBYTE = ICHAR(CMPR(I))
I = I+1
BASEPIXEL = BASEPIXEL+IONEBYTE
ELSE IF ( ISIZE .EQ. 2 ) THEN
ITWOBYTES = ICHAR(CMPR(I))
ITWOBYTES = ITWOBYTES+ISHFT(ICHAR(CMPR(I+1)),8)
I = I+2
BASEPIXEL = BASEPIXEL+ITWOBYTES
ELSE IF ( ISIZE.EQ.4 ) THEN
IFOURBYTES = ICHAR(CMPR(I))
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CMPR(I+1)),8)
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CMPR(I+2)),16)
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CMPR(I+3)),24)
I = I+4
BASEPIXEL = BASEPIXEL+IFOURBYTES
END IF
c IF ( MOD(J,100000).EQ.0 ) PRINT *,I,J,BASEPIXEL
IMG(J) = BASEPIXEL
J = J+1
END DO
RETURN
END
SUBROUTINE UNPACK_CBF3(N,CMPR,MXY,IMG)
Cf2py intent(in) N
Cf2py intent(in) CMPR
Cf2py depend(N) CMPR
Cf2py intent(in) MXY
Cf2py intent(in,out) IMG
Cf2py depend(MXY) IMG
IMPLICIT NONE
INTEGER*4 N,MXY
INTEGER*1 CMPR(0:N-1)
INTEGER*4 IMG(0:MXY-1),BASEPIXEL
INTEGER*4 I,J,ISIZE
CHARACTER*1 C1,E1
CHARACTER*2 C2,E2
CHARACTER*4 C4,E4
INTEGER*1 IONEBYTE
INTEGER*2 ITWOBYTES
INTEGER*4 IFOURBYTES
E1 = CHAR(128)
E2 = CHAR(0)//CHAR(128)
E4 = CHAR(0)//CHAR(0)//CHAR(0)//CHAR(128)
I = 0
J = 0
BASEPIXEL = 0
DO WHILE ( I.LT.N )
C1 = CHAR(CMPR(I))
ISIZE = 1
IF ( C1.EQ.E1 ) THEN
ISIZE = 2
I = I+1
C2 = CHAR(CMPR(I))//CHAR(CMPR(I+1))
IF ( C2.EQ.E2 ) THEN
ISIZE = 4
I = I+2
C4 = CHAR(CMPR(I))//CHAR(CMPR(I+1))//
1 CHAR(CMPR(I+2))//CHAR(CMPR(I+3))
IF ( C4.EQ.E4 ) THEN
ISIZE = 8
I = I+4
END IF
END IF
END IF
IF ( ISIZE .EQ. 1 ) THEN
IONEBYTE = ICHAR(CHAR(CMPR(I)))
I = I+1
BASEPIXEL = BASEPIXEL+IONEBYTE
ELSE IF ( ISIZE .EQ. 2 ) THEN
ITWOBYTES = ICHAR(CHAR(CMPR(I)))
ITWOBYTES = ITWOBYTES+ISHFT(ICHAR(CHAR(CMPR(I+1))),8)
I = I+2
BASEPIXEL = BASEPIXEL+ITWOBYTES
ELSE IF ( ISIZE.EQ.4 ) THEN
IFOURBYTES = ICHAR(CHAR(CMPR(I)))
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CHAR(CMPR(I+1))),8)
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CHAR(CMPR(I+2))),16)
IFOURBYTES = IFOURBYTES+ISHFT(ICHAR(CHAR(CMPR(I+3))),24)
I = I+4
BASEPIXEL = BASEPIXEL+IFOURBYTES
END IF
c IF ( MOD(J,100000).EQ.0 ) PRINT *,I,J,BASEPIXEL
IMG(J) = BASEPIXEL
J = J+1
END DO
RETURN
END