1/** 2 * 3 * File Name: omxVCM4P10_InterpolateLuma.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 * Description: 12 * This function will calculate Performs quarter-pixel interpolation 13 * 14 */ 15 16#include "omxtypes.h" 17#include "armOMX.h" 18#include "omxVC.h" 19 20#include "armVC.h" 21#include "armCOMM.h" 22 23/** 24 * Function: omxVCM4P10_InterpolateLuma (6.3.3.2.1) 25 * 26 * Description: 27 * Performs quarter-pixel interpolation for inter luma MB. It is assumed that 28 * the frame is already padded when calling this function. 29 * 30 * Input Arguments: 31 * 32 * pSrc -Pointer to the source reference frame buffer 33 * srcStep -reference frame step, in bytes; must be a multiple of roi.width 34 * dstStep -destination frame step, in bytes; must be a multiple of 35 * roi.width 36 * dx -Fractional part of horizontal motion vector component in 1/4 pixel 37 * unit; valid in the range [0,3] 38 * dy -Fractional part of vertical motion vector y component in 1/4 pixel 39 * unit; valid in the range [0,3] 40 * roi -Dimension of the interpolation region; the parameters roi.width and 41 * roi.height must be equal to either 4, 8, or 16. 42 * 43 * Output Arguments: 44 * 45 * pDst -Pointer to the destination frame buffer if roi.width==4, 4-byte 46 * alignment required if roi.width==8, 8-byte alignment required 47 * if roi.width==16, 16-byte alignment required 48 * 49 * Return Value: 50 * If the function runs without error, it returns OMX_Sts_NoErr. 51 * If one of the following cases occurs, the function returns 52 * OMX_Sts_BadArgErr: 53 * pSrc or pDst is NULL. 54 * srcStep or dstStep < roi.width. 55 * dx or dy is out of range [0,3]. 56 * roi.width or roi.height is out of range {4, 8, 16}. 57 * roi.width is equal to 4, but pDst is not 4 byte aligned. 58 * roi.width is equal to 8 or 16, but pDst is not 8 byte aligned. 59 * srcStep or dstStep is not a multiple of 8. 60 * 61 */ 62 63OMXResult omxVCM4P10_InterpolateLuma ( 64 const OMX_U8* pSrc, 65 OMX_S32 srcStep, 66 OMX_U8* pDst, 67 OMX_S32 dstStep, 68 OMX_S32 dx, 69 OMX_S32 dy, 70 OMXSize roi 71 ) 72{ 73 /* check for argument error */ 74 armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 75 armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 76 armRetArgErrIf(srcStep < roi.width, OMX_Sts_BadArgErr) 77 armRetArgErrIf(dstStep < roi.width, OMX_Sts_BadArgErr) 78 armRetArgErrIf(dx < 0, OMX_Sts_BadArgErr) 79 armRetArgErrIf(dx > 3, OMX_Sts_BadArgErr) 80 armRetArgErrIf(dy < 0, OMX_Sts_BadArgErr) 81 armRetArgErrIf(dy > 3, OMX_Sts_BadArgErr) 82 armRetArgErrIf((roi.width != 4) && (roi.width != 8) && (roi.width != 16), OMX_Sts_BadArgErr) 83 armRetArgErrIf((roi.height != 4) && (roi.height != 8) && (roi.height != 16), OMX_Sts_BadArgErr) 84 armRetArgErrIf((roi.width == 4) && armNot4ByteAligned(pDst), OMX_Sts_BadArgErr) 85 armRetArgErrIf((roi.width == 8) && armNot8ByteAligned(pDst), OMX_Sts_BadArgErr) 86 armRetArgErrIf((roi.width == 16) && armNot16ByteAligned(pDst), OMX_Sts_BadArgErr) 87 armRetArgErrIf(srcStep & 7, OMX_Sts_BadArgErr) 88 armRetArgErrIf(dstStep & 7, OMX_Sts_BadArgErr) 89 90 return armVCM4P10_Interpolate_Luma 91 (pSrc, srcStep, pDst, dstStep, roi.width, roi.height, dx, dy); 92 93} 94 95 96/***************************************************************************** 97 * END OF FILE 98 *****************************************************************************/ 99 100