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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SATD_4x4.c')
| -rw-r--r-- | media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SATD_4x4.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SATD_4x4.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SATD_4x4.c new file mode 100644 index 0000000..a91ae66 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SATD_4x4.c @@ -0,0 +1,132 @@ +/** + * + * File Name: omxVCM4P10_SATD_4x4.c + * OpenMAX DL: v1.0.2 + * Revision: 9641 + * Date: Thursday, February 7, 2008 + * + * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. + * + * + * Description: + * This function will calculate SAD for 4x4 blocks + * + */ +#include "omxtypes.h" +#include "armOMX.h" +#include "omxVC.h" + +#include "armCOMM.h" + +/** + * Function: omxVCM4P10_SATD_4x4 (6.3.5.4.5) + * + * Description: + * This function calculates the sum of absolute transform differences (SATD) + * for a 4x4 block by applying a Hadamard transform to the difference block + * and then calculating the sum of absolute coefficient values. + * + * Input Arguments: + * + * pSrcOrg - Pointer to the original block; must be aligned on a 4-byte + * boundary + * iStepOrg - Step of the original block buffer; must be a multiple of 4 + * pSrcRef - Pointer to the reference block; must be aligned on a 4-byte + * boundary + * iStepRef - Step of the reference block buffer; must be a multiple of 4 + * + * Output Arguments: + * + * pDstSAD - pointer to the resulting SAD + * + * Return Value: + * + * OMX_Sts_NoErr - no error + * OMX_Sts_BadArgErr - bad arguments; returned if any of the following + * conditions are true: + * - at least one of the following pointers is NULL: + * pSrcOrg, pSrcRef, or pDstSAD either pSrcOrg + * - pSrcRef is not aligned on a 4-byte boundary + * - iStepOrg <= 0 or iStepOrg is not a multiple of 4 + * - iStepRef <= 0 or iStepRef is not a multiple of 4 + * + */ +OMXResult omxVCM4P10_SATD_4x4( + const OMX_U8* pSrcOrg, + OMX_U32 iStepOrg, + const OMX_U8* pSrcRef, + OMX_U32 iStepRef, + OMX_U32* pDstSAD +) +{ + OMX_INT i, j; + OMX_S32 SATD = 0; + OMX_S32 d [4][4], m1[4][4], m2[4][4]; + + /* check for argument error */ + armRetArgErrIf(pSrcOrg == NULL, OMX_Sts_BadArgErr) + armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr) + armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr) + armRetArgErrIf((iStepOrg == 0) || (iStepOrg & 3), OMX_Sts_BadArgErr) + armRetArgErrIf((iStepRef == 0) || (iStepRef & 3), OMX_Sts_BadArgErr) + armRetArgErrIf(armNot4ByteAligned(pSrcOrg), OMX_Sts_BadArgErr) + armRetArgErrIf(armNot4ByteAligned(pSrcRef), OMX_Sts_BadArgErr) + + /* Calculate the difference */ + for (j = 0; j < 4; j++) + { + for (i = 0; i < 4; i++) + { + d [j][i] = pSrcOrg [j * iStepOrg + i] - pSrcRef [j * iStepRef + i]; + } + } + + /* Hadamard Transfor for 4x4 block */ + + /* Horizontal */ + for (i = 0; i < 4; i++) + { + m1[i][0] = d[i][0] + d[i][2]; /* a+c */ + m1[i][1] = d[i][1] + d[i][3]; /* b+d */ + m1[i][2] = d[i][0] - d[i][2]; /* a-c */ + m1[i][3] = d[i][1] - d[i][3]; /* b-d */ + + m2[i][0] = m1[i][0] + m1[i][1]; /* a+b+c+d */ + m2[i][1] = m1[i][2] + m1[i][3]; /* a+b-c-d */ + m2[i][2] = m1[i][2] - m1[i][3]; /* a-b-c+d */ + m2[i][3] = m1[i][0] - m1[i][1]; /* a-b+c-d */ + + } + + /* Vertical */ + for (i = 0; i < 4; i++) + { + m1[0][i] = m2[0][i] + m2[2][i]; + m1[1][i] = m2[1][i] + m2[3][i]; + m1[2][i] = m2[0][i] - m2[2][i]; + m1[3][i] = m2[1][i] - m2[3][i]; + + m2[0][i] = m1[0][i] + m1[1][i]; + m2[1][i] = m1[2][i] + m1[3][i]; + m2[2][i] = m1[2][i] - m1[3][i]; + m2[3][i] = m1[0][i] - m1[1][i]; + } + + /* calculate SAD for Transformed coefficients */ + for (j = 0; j < 4; j++) + { + for (i = 0; i < 4; i++) + { + SATD += armAbs(m2 [j][i]); + } + } + + *pDstSAD = (SATD + 1) / 2; + + return OMX_Sts_NoErr; +} + +/***************************************************************************** + * END OF FILE + *****************************************************************************/ + |