Manual Pages for UNIX Operating System command usage for man mlib_VideoDCT8x8_S16_U8

mediaLib Library Functions         mlib_VideoDCT8x8_S16_U8(3MLIB)



NAME
     mlib_VideoDCT8x8_S16_U8 - forward Discrete Cosine  Transform
     (DCT)

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

     mlib_status mlib_VideoDCT8x8_S16_U8(mlib_s16 coeffs[64],
          const mlib_u8 *block, mlib_s32 stride);


DESCRIPTION
     The mlib_VideoDCT8x8_S16_U8() function computes the  forward
     DCT  for  the  destination  DCT  coefficients  of  data type
     mlib_s16 and source block of data type mlib_u8.  The  stride
     applies  to  the  block  that is part of the frame currently
     being encoded.


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


     This function can be used in JPEG with 8-bit  precision,  or
     in MPEG for the intra mode.

PARAMETERS
     The function takes the following arguments:

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


     block     Pointer to an 8x8 block in the current frame. Note
               that block must be 8-byte aligned.


     stride    Stride in  bytes  between  adjacent  rows  in  the
               block.  Note  that  stride  must  be a multiple of
               eight.


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_VideoDCT8x8_S16_U8(3MLIB)



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


SEE ALSO
     mlib_VideoDCT2x2_S16_S16(3MLIB),
     mlib_VideoDCT4x4_S16_S16(3MLIB),
     mlib_VideoDCT8x8_S16_S16_B10(3MLIB),
     mlib_VideoDCT8x8_S16_S16_B10_NA(3MLIB),
     mlib_VideoDCT8x8_S16_S16_B12(3MLIB),
     mlib_VideoDCT8x8_S16_U8_NA(3MLIB),
     mlib_VideoDCT16x16_S16_S16(3MLIB),
     mlib_VideoDCT16x16_S16_S16_B10(3MLIB),
     mlib_VideoDeQuantize_S16(3MLIB),
     mlib_VideoDeQuantizeInit_S16(3MLIB),
     mlib_VideoQuantize_S16(3MLIB),
     mlib_VideoQuantizeInit_S16(3MLIB), attributes(5)

































SunOS 5.11           Last change: 2 Mar 2007                    2