1 /** 2 * 3 * File Name: armVCM4P2_FillVLDBuffer.c 4 * OpenMAX DL: v1.0.2 5 * Revision: 9641 6 * Date: Thursday, February 7, 2008 7 * 8 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 9 * 10 * 11 * 12 * Description: 13 * Contains module for VLC get bits from the stream 14 * 15 */ 16 17 #include "omxtypes.h" 18 #include "armOMX.h" 19 20 #include "armVCM4P2_ZigZag_Tables.h" 21 22 23 /** 24 * Function: armVCM4P2_FillVLDBuffer 25 * 26 * Description: 27 * Performs filling of the coefficient buffer according to the run, level 28 * and sign, also updates the index 29 * 30 * Parameters: 31 * [in] storeRun Stored Run value (count of zeros) 32 * [in] storeLevel Stored Level value (non-zero value) 33 * [in] sign Flag indicating the sign of level 34 * [in] last status of the last flag 35 * [in] pIndex pointer to coefficient index in 8x8 matrix 36 * [out] pIndex pointer to updated coefficient index in 8x8 37 * matrix 38 * [in] pZigzagTable pointer to the zigzag tables 39 * [out] pDst pointer to the coefficient buffer of current 40 * block. Should be 32-bit aligned 41 * Return Value: 42 * Standard OMXResult result. See enumeration for possible result codes. 43 * 44 */ 45 46 OMXResult armVCM4P2_FillVLDBuffer( 47 OMX_U32 storeRun, 48 OMX_S16 * pDst, 49 OMX_S16 storeLevel, 50 OMX_U8 sign, 51 OMX_U8 last, 52 OMX_U8 * pIndex, 53 const OMX_U8 * pZigzagTable 54 ) 55 { 56 /* Store the zero's as per the run length count */ 57 for (;storeRun > 0; storeRun--, (*pIndex)++) 58 { 59 pDst[pZigzagTable[*pIndex]] = 0; 60 } 61 /* Store the level depending on the sign*/ 62 if (sign == 1) 63 { 64 pDst[pZigzagTable[*pIndex]] = -storeLevel; 65 } 66 else 67 { 68 pDst[pZigzagTable[*pIndex]] = storeLevel; 69 } 70 (*pIndex)++; 71 72 /* If last is 1, fill the remaining elments of the buffer with zeros */ 73 if (last == 1) 74 { 75 while (*pIndex < 64) 76 { 77 pDst[pZigzagTable[*pIndex]] = 0; 78 (*pIndex)++; 79 } 80 } 81 82 return OMX_Sts_NoErr; 83 } 84 85
