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mlib_videodequantizeidct8x8_s16_s16_b12(3mlib) [opensolaris man page]

mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(3MLIB)		    mediaLib Library Functions		    mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(3MLIB)

NAME

       mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12 - dequantization and inverse Discrete Cosine Transform (IDCT)

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(
	    mlib_s16 block[64], const mlib_s16 coeffs[64],
	    const mlib_d64 dqtable[64]);

DESCRIPTION

       The mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12() function dequantizes the quantized DCT coefficients and then computes the inverse DCT. It's a
       combination of mlib_VideoDeQuantize_S16() and mlib_VideoIDCT8x8_S16_S16_B12() for better performance. The output of this function should be
       within the range of [-2048, 2047] if coeffs is obtained from the corresponding mlib_VideoDCT8x8Quantize_S16_S16_B12() 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 mlib_VideoDeQuantizeInit_S16().

RETURN VALUES

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

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12_NA(3MLIB), mlib_VideoDeQuantizeIDCT8x8_U8_S16(3MLIB), mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(3MLIB),
       mlib_VideoDeQuantizeInit_S16(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007			    mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(3MLIB)

Check Out this Related Man Page

mlib_VideoDCT8x8Quantize_S16_U8(3MLIB)			    mediaLib Library Functions			    mlib_VideoDCT8x8Quantize_S16_U8(3MLIB)

NAME

       mlib_VideoDCT8x8Quantize_S16_U8 - forward Discrete Cosine Transform (DCT) and quantization

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_VideoDCT8x8Quantize_S16_U8(
	    mlib_s16 coeffs[64], const mlib_u8 *block,
	    const mlib_d64 dqtable[64], mlib_s32 stride);

DESCRIPTION

       The  mlib_VideoDCT8x8Quantize_S16_U8()  function  computes  the	forward DCT and then quantizes the DCT coefficients. It's a combination of
       mlib_VideoDCT8x8_S16_U8() and mlib_VideoQuantize_S16() for better performance.

       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 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().

       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 attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_VideoDCT8x8Quantize_S16_S16_B12(3MLIB),   mlib_VideoDCT8x8Quantize_S16_S16_B12_NA(3MLIB),	mlib_VideoDCT8x8Quantize_S16_U8_NA(3MLIB),
       mlib_VideoQuantizeInit_S16(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007				    mlib_VideoDCT8x8Quantize_S16_U8(3MLIB)
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