TransformDequantLumaDC_H264

Performs integer inverse transformation and dequantization for 4x4 luma DC coefficients.

Syntax

IppStatus ippiTransformDequantLumaDC_H264_16s_C1I(Ipp16s* pSrcDst, Ipp32s QP);

Parameters

pSrcDst

Pointer to the initial coefficients and resultant DC (4x4 block).

QP

Quantization parameter.

Description

The function ippiTransformDequantLumaDC_H264_16s_C1I is declared in the ippvc.h file. This function performs integer inverse transformation and dequantization for 4x4 luma DC coefficients in accordance with 8.5.6 of [JVTG050].

The argument QP stands here for a luma quantization parameter, which is designated in JVT-G050 as QPY.

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error condition if at least one of the specified pointers is NULL.

ippStsOutOfRangeErr

Indicates an error condition if QP is less than 1 or greater than 51.
Parent topic: Inverse Quantization and Inverse Transform

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