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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfDiag_Luma.c')
-rw-r--r-- | media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfDiag_Luma.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfDiag_Luma.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfDiag_Luma.c new file mode 100644 index 0000000..8732f4f --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfDiag_Luma.c @@ -0,0 +1,106 @@ +/** + * + * File Name: armVCM4P10_InterpolateHalfDiag_Luma.c + * OpenMAX DL: v1.0.2 + * Revision: 9641 + * Date: Thursday, February 7, 2008 + * + * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. + * + * + * Description: + * This functions will help to calculate Half Pel luma interpolation + * + */ + +#include "omxtypes.h" +#include "armOMX.h" +#include "omxVC.h" + +#include "armCOMM.h" +#include "armVC.h" + + +/** + * Function: armVCM4P10_InterpolateHalfDiag_Luma + * + * Description: + * This function performs interpolation for (1/2, 1/2) positions + * around a full-pel position. + * + * Remarks: + * + * [in] pSrc Pointer to top-left corner of block used to interpolate + * in the reconstructed frame plane + * [in] iSrcStep Step of the source buffer. + * [in] iDstStep Step of the destination(interpolation) buffer. + * [in] iWidth Width of the current block + * [in] iHeight Height of the current block + * [out] pDst Pointer to the interpolation buffer of the (1/2,1/2)-pel + * + * Return Value: + * Standard OMXResult value. + * + */ + +OMXResult armVCM4P10_InterpolateHalfDiag_Luma( + const OMX_U8* pSrc, + OMX_U32 iSrcStep, + OMX_U8* pDst, + OMX_U32 iDstStep, + OMX_U32 iWidth, + OMX_U32 iHeight +) +{ + OMX_S32 HalfCoeff, pos; + OMX_S16 Buf [21 * 16]; /* 21 rows by 16 pixels per row */ + OMX_U32 y, x; + + /* check for argument error */ + armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) + armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) + + /* + * Intermediate values will be 1/2 pel at Horizontal direction + * Starting at (0.5, -2) at top extending to (0.5, height + 3) at bottom + * Buf contains a 2D array of size (iWidth)X(iHeight + 5) + */ + for (y = 0; y < iHeight + 5; y++) + { + for (x = 0; x < iWidth; x++) + { + pos = (y-2) * iSrcStep + x; + HalfCoeff = + pSrc [pos - 2] - + 5 * pSrc [pos - 1] + + 20 * pSrc [pos] + + 20 * pSrc [pos + 1] - + 5 * pSrc [pos + 2] + + pSrc [pos + 3]; + Buf [y * iWidth + x] = (OMX_S16)HalfCoeff; + } /* x */ + } /* y */ + + /* Vertical interpolate */ + for (y = 0; y < iHeight; y++) + { + for (x = 0; x < iWidth; x++) + { + pos = y * iWidth + x; + HalfCoeff = + Buf [pos] - + 5 * Buf [pos + 1 * iWidth] + + 20 * Buf [pos + 2 * iWidth] + + 20 * Buf [pos + 3 * iWidth] - + 5 * Buf [pos + 4 * iWidth] + + Buf [pos + 5 * iWidth]; + + HalfCoeff = (HalfCoeff + 512) >> 10; + HalfCoeff = armClip(0, 255, HalfCoeff); + + pDst [y * iDstStep + x] = (OMX_U8) HalfCoeff; + } + } + + return OMX_Sts_NoErr; +} |