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+/**
+ *
+ * File Name: omxVCM4P10_InvTransformResidualAndAdd.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 inverse integer 4x4 transform
+ *
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+#include "armVC.h"
+
+/**
+ * Function: omxVCM4P10_InvTransformResidualAndAdd (6.3.5.7.1)
+ *
+ * Description:
+ * This function performs inverse an 4x4 integer transformation to produce
+ * the difference signal and then adds the difference to the prediction to get
+ * the reconstructed signal.
+ *
+ * Input Arguments:
+ *
+ * pSrcPred - Pointer to prediction signal. 4-byte alignment required.
+ * pDequantCoeff - Pointer to the transformed coefficients. 8-byte
+ * alignment required.
+ * iSrcPredStep - Step of the prediction buffer; must be a multiple of 4.
+ * iDstReconStep - Step of the destination reconstruction buffer; must be a
+ * multiple of 4.
+ * bAC - Indicate whether there is AC coefficients in the coefficients
+ * matrix.
+ *
+ * Output Arguments:
+ *
+ * pDstRecon -Pointer to the destination reconstruction buffer. 4-byte
+ * alignment required.
+ *
+ * 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:
+ * pSrcPred, pDequantCoeff, pDstRecon
+ * - pSrcPred is not aligned on a 4-byte boundary
+ * - iSrcPredStep or iDstReconStep is not a multiple of 4.
+ * - pDequantCoeff is not aligned on an 8-byte boundary
+ *
+ */
+OMXResult omxVCM4P10_InvTransformResidualAndAdd(
+ const OMX_U8* pSrcPred,
+ const OMX_S16* pDequantCoeff,
+ OMX_U8* pDstRecon,
+ OMX_U32 iSrcPredStep,
+ OMX_U32 iDstReconStep,
+ OMX_U8 bAC
+)
+{
+ OMX_INT i, j;
+ OMX_S16 In[16], Out[16];
+ OMX_S32 Value;
+
+ /* check for argument error */
+ armRetArgErrIf(pSrcPred == NULL, OMX_Sts_BadArgErr)
+ armRetArgErrIf(armNot4ByteAligned(pSrcPred), OMX_Sts_BadArgErr)
+ armRetArgErrIf(pDequantCoeff == NULL, OMX_Sts_BadArgErr)
+ armRetArgErrIf(armNot8ByteAligned(pDequantCoeff), OMX_Sts_BadArgErr)
+ armRetArgErrIf(pDstRecon == NULL, OMX_Sts_BadArgErr)
+ armRetArgErrIf(armNot4ByteAligned(pDstRecon), OMX_Sts_BadArgErr)
+ armRetArgErrIf(bAC > 1, OMX_Sts_BadArgErr)
+ armRetArgErrIf(iSrcPredStep == 0 || iSrcPredStep & 3, OMX_Sts_BadArgErr)
+ armRetArgErrIf(iDstReconStep == 0 || iDstReconStep & 3, OMX_Sts_BadArgErr)
+
+ if (bAC)
+ {
+ for (i = 0; i < 16; i++)
+ {
+ In[i] = pDequantCoeff [i];
+ }
+ }
+ else
+ {
+ /* Copy DC */
+ In[0] = pDequantCoeff [0];
+
+ for (i = 1; i < 16; i++)
+ {
+ In[i] = 0;
+ }
+ }
+
+ /* Residual Transform */
+ armVCM4P10_TransformResidual4x4 (Out, In);
+
+ for (j = 0; j < 4; j++)
+ {
+ for (i = 0; i < 4; i++)
+ {
+ /* Add predition */
+ Value = (OMX_S32) Out [j * 4 + i] + pSrcPred [j * iSrcPredStep + i];
+
+ /* Saturate Value to OMX_U8 */
+ Value = armClip (0, 255, Value);
+
+ pDstRecon[j * iDstReconStep + i] = (OMX_U8) Value;
+ }
+ }
+
+ return OMX_Sts_NoErr;
+}
+
+/*****************************************************************************
+ * END OF FILE
+ *****************************************************************************/
+