mediaLib Library Functions
                   mlibVideoDeQuantizeIDCT8x8S16S16B12(3MLIB)



NAME
     mlibVideoDeQuantizeIDCT8x8S16S16B12 - dequantization and
     inverse Discrete Cosine Transform (IDCT)

SYNOPSIS
     cc [ flag... ] file... -lmlib [ library... ]
     #include 

     mlibstatus mlibVideoDeQuantizeIDCT8x8S16S16B12(
          mlibs16 block[64], const mlibs16 coeffs[64],
          const mlibd64 dqtable[64]);


DESCRIPTION
     The    mlibVideoDeQuantizeIDCT8x8S16S16B12()    function
     dequantizes the quantized DCT coefficients and then computes
     the    inverse    DCT.     It's     a     combination     of
     mlibVideoDeQuantizeS16()                               and
     mlibVideoIDCT8x8S16S16B12() for better performance.  The
     output  of  this  function  should be within the range of [-
     2048, 2047] if coeffs is  obtained  from  the  corresponding
     mlibVideoDCT8x8QuantizeS16S16B12() function.


     The source and destination buffer addresses must  be  8-byte
     aligned.


     This function can be used in JPEG with 12-bit precision,  or
     in MPEG for the inter mode.

PARAMETERS
     The function takes the following arguments:

     block      Pointer to an 8x8 block. Note that block must  be
                8-byte aligned.


     coeffs     Pointer to the input quantized DCT  coefficients.
                Note that coeffs must be 8-byte aligned.


     dqtable    Pointer to the dequantization table generated  by
                mlibVideoDeQuantizeInitS16().


RETURN VALUES
     The function returns MLIBSUCES if  successful.  Otherwise
     it returns MLIBFAILURE.





SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions
                   mlibVideoDeQuantizeIDCT8x8S16S16B12(3MLIB)



ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     mlibVideoDeQuantizeIDCT8x8S16S16B12NA(3MLIB),
     mlibVideoDeQuantizeIDCT8x8U8S16(3MLIB),
     mlibVideoDeQuantizeIDCT8x8U8S16NA(3MLIB),
     mlibVideoDeQuantizeInitS16(3MLIB), attributes(5)


































SunOS 5.11           Last change: 2 Mar 2007                    2






mediaLib Library Functions
                   mlibVideoDeQuantizeIDCT8x8S16S16B12(3MLIB)






















































SunOS 5.11           Last change: 2 Mar 2007                    3