Manual Pages for UNIX Operating System command usage for man mlib_VideoDCT8x8Quantize_S16_S16_B12

mediaLib Library Functions
                      mlib_VideoDCT8x8Quantize_S16_S16_B12(3MLIB)



NAME
     mlib_VideoDCT8x8Quantize_S16_S16_B12  -   forward   Discrete
     Cosine Transform (DCT) and quantization

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

     mlib_status mlib_VideoDCT8x8Quantize_S16_S16_B12(
          mlib_s16 coeffs[64], const mlib_s16 block[64],
          const mlib_d64 dqtable[64]);


DESCRIPTION
     The mlib_VideoDCT8x8Quantize_S16_S16_B12() function computes
     the  forward  DCT  and  then quantizes the DCT coefficients.
     It's a  combination  of  mlib_VideoDCT8x8_S16_S16_B12()  and
     mlib_VideoQuantize_S16()  for better performance. The source
     to the DCT routine can occupy up to 12 bits for each of  its
     elements, i.e., should be within the range of [-2048, 2047].


     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:

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


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


     dqtable    Pointer to the quantization  table  generated  by
                mlib_VideoQuantizeInit_S16().


RETURN VALUES
     The function returns MLIB_SUCCESS if  successful.  Otherwise
     it returns MLIB_FAILURE.

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



SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions
                      mlib_VideoDCT8x8Quantize_S16_S16_B12(3MLIB)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     mlib_VideoDCT8x8Quantize_S16_S16_B12_NA(3MLIB),
     mlib_VideoDCT8x8Quantize_S16_U8(3MLIB),
     mlib_VideoDCT8x8Quantize_S16_U8_NA(3MLIB),
     mlib_VideoQuantizeInit_S16(3MLIB), attributes(5)








































SunOS 5.11           Last change: 2 Mar 2007                    2






mediaLib Library Functions
                      mlib_VideoDCT8x8Quantize_S16_S16_B12(3MLIB)






















































SunOS 5.11           Last change: 2 Mar 2007                    3