10c1bc742181ded4930842b46e9507372f0b1b963James Dong/* ---------------------------------------------------------------- 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * 40c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC.c 50c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 60c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 12290 70c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Wednesday, April 9, 2008 80c1bc742181ded4930842b46e9507372f0b1b963James Dong * 90c1bc742181ded4930842b46e9507372f0b1b963James Dong * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 100c1bc742181ded4930842b46e9507372f0b1b963James Dong * 110c1bc742181ded4930842b46e9507372f0b1b963James Dong * 120c1bc742181ded4930842b46e9507372f0b1b963James Dong * 130c1bc742181ded4930842b46e9507372f0b1b963James Dong * H.264 decode coefficients module 140c1bc742181ded4930842b46e9507372f0b1b963James Dong * 150c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 160c1bc742181ded4930842b46e9507372f0b1b963James Dong 170c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 180c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 190c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 200c1bc742181ded4930842b46e9507372f0b1b963James Dong 210c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 220c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 230c1bc742181ded4930842b46e9507372f0b1b963James Dong 240c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs CAVLC decoding and inverse raster scan for 2x2 block of 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * ChromaDCLevel. The decoded coefficients in packed position-coefficient 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * buffer are stored in increasing raster scan order, namely position order. 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * Remarks: 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * Parameters: 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] ppBitStream Double pointer to current byte in bit stream 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * buffer 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pOffset Pointer to current bit position in the byte 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * pointed to by *ppBitStream 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] ppBitStream *ppBitStream is updated after each block is decoded 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pOffset *pOffset is updated after each block is decoded 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pNumCoeff Pointer to the number of nonzero coefficients 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * in this block 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] ppPosCoefbuf Double pointer to destination residual 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * coefficient-position pair buffer 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard omxError result. See enumeration for possible result codes. 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * 490c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 500c1bc742181ded4930842b46e9507372f0b1b963James Dong 510c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC ( 520c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8** ppBitStream, 530c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S32* pOffset, 540c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8* pNumCoeff, 550c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8** ppPosCoefbuf 560c1bc742181ded4930842b46e9507372f0b1b963James Dong ) 570c1bc742181ded4930842b46e9507372f0b1b963James Dong 580c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 590c1bc742181ded4930842b46e9507372f0b1b963James Dong return armVCM4P10_DecodeCoeffsToPair(ppBitStream, pOffset, pNumCoeff, 600c1bc742181ded4930842b46e9507372f0b1b963James Dong ppPosCoefbuf, 17, 4); 610c1bc742181ded4930842b46e9507372f0b1b963James Dong 620c1bc742181ded4930842b46e9507372f0b1b963James Dong} 63