mediaLib Library Functions
                mlibVideoDeQuantizeIDCT8x8S16S16B12NA(3MLIB)



NAME
     mlibVideoDeQuantizeIDCT8x8S16S16B12NA -  dequantization
     and inverse Discrete Cosine Transform (IDCT)

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

     mlibstatus mlibVideoDeQuantizeIDCT8x8S16S16B12NA(
          mlibs16 block[64], const mlibs16 coeffs[64],
          const mlibd64 dqtable[64]);


DESCRIPTION
     The  mlibVideoDeQuantizeIDCT8x8S16S16B12NA()   function
     dequantizes the quantized DCT coefficients and then computes
     the    inverse    DCT.     It's     a     combination     of
     mlibVideoDeQuantizeS16()                               and
     mlibVideoIDCT8x8S16S16B12NA() for  better  performance.
     The  output  of  this function should be within the range of
     [-2048, 2047] if coeffs is obtained from  the  corresponding
     mlibVideoDCT8x8QuantizeS16S16B12NA() function.


     This function requires no special address alignment.


     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.


     coeffs     Pointer to the input quantized DCT coefficients.


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


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

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




SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions
                mlibVideoDeQuantizeIDCT8x8S16S16B12NA(3MLIB)



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


SEE ALSO
     mlibVideoDeQuantizeIDCT8x8S16S16B12(3MLIB),
     mlibVideoDeQuantizeIDCT8x8U8S16(3MLIB),
     mlibVideoDeQuantizeIDCT8x8U8S16NA(3MLIB),
     mlibVideoDeQuantizeInitS16(3MLIB), attributes(5)








































SunOS 5.11           Last change: 2 Mar 2007                    2






mediaLib Library Functions
                mlibVideoDeQuantizeIDCT8x8S16S16B12NA(3MLIB)






















































SunOS 5.11           Last change: 2 Mar 2007                    3