178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar/* 278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Copyright (C) 2007-2008 ARM Limited 378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Licensed under the Apache License, Version 2.0 (the "License"); 578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * you may not use this file except in compliance with the License. 678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * You may obtain a copy of the License at 778e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 878e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * http://www.apache.org/licenses/LICENSE-2.0 978e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1078e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Unless required by applicable law or agreed to in writing, software 1178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * distributed under the License is distributed on an "AS IS" BASIS, 1278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * See the License for the specific language governing permissions and 1478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * limitations under the License. 1578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar */ 170c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 180c1bc742181ded4930842b46e9507372f0b1b963James Dong * 190c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: armVCM4P2_FillVLDBuffer.c 200c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 210c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 220c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 230c1bc742181ded4930842b46e9507372f0b1b963James Dong * 240c1bc742181ded4930842b46e9507372f0b1b963James Dong * 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * Contains module for VLC get bits from the stream 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * 300c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 310c1bc742181ded4930842b46e9507372f0b1b963James Dong 320c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 330c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 340c1bc742181ded4930842b46e9507372f0b1b963James Dong 350c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_ZigZag_Tables.h" 360c1bc742181ded4930842b46e9507372f0b1b963James Dong 370c1bc742181ded4930842b46e9507372f0b1b963James Dong 380c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: armVCM4P2_FillVLDBuffer 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs filling of the coefficient buffer according to the run, level 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * and sign, also updates the index 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * Parameters: 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] storeRun Stored Run value (count of zeros) 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] storeLevel Stored Level value (non-zero value) 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] sign Flag indicating the sign of level 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] last status of the last flag 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pIndex pointer to coefficient index in 8x8 matrix 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pIndex pointer to updated coefficient index in 8x8 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * matrix 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pZigzagTable pointer to the zigzag tables 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pDst pointer to the coefficient buffer of current 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * block. Should be 32-bit aligned 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard OMXResult result. See enumeration for possible result codes. 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * 590c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 600c1bc742181ded4930842b46e9507372f0b1b963James Dong 610c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult armVCM4P2_FillVLDBuffer( 620c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 storeRun, 630c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 * pDst, 640c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 storeLevel, 650c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 sign, 660c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 last, 670c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 * pIndex, 680c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 * pZigzagTable 690c1bc742181ded4930842b46e9507372f0b1b963James Dong) 700c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 710c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Store the zero's as per the run length count */ 720c1bc742181ded4930842b46e9507372f0b1b963James Dong for (;storeRun > 0; storeRun--, (*pIndex)++) 730c1bc742181ded4930842b46e9507372f0b1b963James Dong { 740c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[pZigzagTable[*pIndex]] = 0; 750c1bc742181ded4930842b46e9507372f0b1b963James Dong } 760c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Store the level depending on the sign*/ 770c1bc742181ded4930842b46e9507372f0b1b963James Dong if (sign == 1) 780c1bc742181ded4930842b46e9507372f0b1b963James Dong { 790c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[pZigzagTable[*pIndex]] = -storeLevel; 800c1bc742181ded4930842b46e9507372f0b1b963James Dong } 810c1bc742181ded4930842b46e9507372f0b1b963James Dong else 820c1bc742181ded4930842b46e9507372f0b1b963James Dong { 830c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[pZigzagTable[*pIndex]] = storeLevel; 840c1bc742181ded4930842b46e9507372f0b1b963James Dong } 850c1bc742181ded4930842b46e9507372f0b1b963James Dong (*pIndex)++; 860c1bc742181ded4930842b46e9507372f0b1b963James Dong 870c1bc742181ded4930842b46e9507372f0b1b963James Dong /* If last is 1, fill the remaining elments of the buffer with zeros */ 880c1bc742181ded4930842b46e9507372f0b1b963James Dong if (last == 1) 890c1bc742181ded4930842b46e9507372f0b1b963James Dong { 900c1bc742181ded4930842b46e9507372f0b1b963James Dong while (*pIndex < 64) 910c1bc742181ded4930842b46e9507372f0b1b963James Dong { 920c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[pZigzagTable[*pIndex]] = 0; 930c1bc742181ded4930842b46e9507372f0b1b963James Dong (*pIndex)++; 940c1bc742181ded4930842b46e9507372f0b1b963James Dong } 950c1bc742181ded4930842b46e9507372f0b1b963James Dong } 960c1bc742181ded4930842b46e9507372f0b1b963James Dong 970c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 980c1bc742181ded4930842b46e9507372f0b1b963James Dong} 990c1bc742181ded4930842b46e9507372f0b1b963James Dong 100