frame.f

lpc10-15为美军2400bps语音压缩标准的C语音源代码。

**********************************************************************
*
*	FRAME Version 54
*
* $Log: frame.f,v $
* Revision 1.3  1996/03/21  21:35:44  jaf
* Determined which local variables should be saved from one invocation
* to the next, and gave initial values to the ones that needed them.
*
* Revision 1.2  1996/02/12  15:03:00  jaf
* Added a few comments.  Nothing comprehensive.
*
* Revision 1.1  1996/02/07 14:46:05  jaf
* Initial revision
*
*
**********************************************************************
*
*    Do whatever has to be done on a per frame basis:
*
*   * Update frame and block counters
*
*   * Set test data level of detail for particular frames:
*     Level  Meaning
*       -1     Vary detail level by frame 
*        0     No data file generated
*        1     Processing statistics only
*        2     Coded parameters for each frame
*        3     Scalar variables and RC's
*        4     Vectors and matrices
*        5     Synthesis buffers
*        6     Analysis buffers
*
*   To use variable detail level, create a file 'TESTDATA.DAT' with lines
*   containing < starting frame, ending frame, detail level > for each
*   range of interest.  If ending frame = 0, the specified detail level
*   will be used when not within any explicitly specified range.
*

*       All of the things in here now are only for updating things
*       related to printing debugging information.

	SUBROUTINE FRAME()
	INCLUDE 'contrl.fh'

*       Parameters/constants

	INTEGER LUNIT
	PARAMETER (LUNIT=7)

*       Local state

*       Given that NFRAME is initialized to 0 before the first call, LL
*       will always be initialized on the first call.
*       
*       In addition, if FRAME2 is initialized to any value .LE. NFRAME's
*       value on the first call, then the code below is guaranteed to
*       initialize FRAME1 and LNEXT before using their values.

	INTEGER FRAME1, FRAME2, LSAVE, LNEXT, LL

	SAVE FRAME1, FRAME2, LSAVE, LNEXT, LL

	DATA FRAME2 /0/, LSAVE /0/

*  Update frame counter

	NFRAME = NFRAME + 1

*   Set test data level of detail

*       Note that the following condition is true exactly once, on the
*       first call to FRAME.  Thus, LL is always initialized on the
*       first call.

	IF (NFRAME .LE. 1) THEN
	    LL = LISTL
	    IF (LL .LT. 0)
     1          OPEN(UNIT=LUNIT, FILE='TESTDATA.DAT', STATUS='OLD')
	END IF

	IF (LL .LT. 0) THEN
	    DO WHILE (NFRAME.GE.FRAME2)
	        READ(LUNIT,*,END=1110) FRAME1, FRAME2, LNEXT
	        LNEXT = MAX(LNEXT, 1)
		LSAVE = MAX(LSAVE, 1)
	        IF (FRAME2 .LE. 0) LSAVE = LNEXT
	    END DO
1110	    LISTL = LSAVE
	    IF (NFRAME.GE.FRAME1 .AND. NFRAME.LE.FRAME2) LISTL = LNEXT
	END IF
	RETURN
	END