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+ /**
+ *
+ * File Name: omxVCM4P2_PredictReconCoefIntra.c
+ * OpenMAX DL: v1.0.2
+ * Revision: 9641
+ * Date: Thursday, February 7, 2008
+ *
+ * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
+ *
+ *
+ *
+ * File: omxVCM4P2_PredictReconCoefIntra_S16.c
+ * Description: Contains modules for AC DC prediction
+ *
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+#include "armVC.h"
+
+/**
+ * Function: omxVCM4P2_PredictReconCoefIntra (6.2.5.4.3)
+ *
+ * Description:
+ * Performs adaptive DC/AC coefficient prediction for an intra block. Prior
+ * to the function call, prediction direction (predDir) should be selected as
+ * specified in [ISO14496-2], subclause 7.4.3.1.
+ *
+ * Input Arguments:
+ *
+ * pSrcDst - pointer to the coefficient buffer which contains the quantized
+ * coefficient residuals (PQF) of the current block; must be
+ * aligned on a 4-byte boundary. The output coefficients are
+ * saturated to the range [-2048, 2047].
+ * pPredBufRow - pointer to the coefficient row buffer; must be aligned on
+ * a 4-byte boundary.
+ * pPredBufCol - pointer to the coefficient column buffer; must be aligned
+ * on a 4-byte boundary.
+ * curQP - quantization parameter of the current block. curQP may equal to
+ * predQP especially when the current block and the predictor block
+ * are in the same macroblock.
+ * predQP - quantization parameter of the predictor block
+ * predDir - indicates the prediction direction which takes one of the
+ * following values: OMX_VC_HORIZONTAL - predict horizontally
+ * OMX_VC_VERTICAL - predict vertically
+ * ACPredFlag - a flag indicating if AC prediction should be performed. It
+ * is equal to ac_pred_flag in the bit stream syntax of MPEG-4
+ * videoComp - video component type (luminance or chrominance) of the
+ * current block
+ *
+ * Output Arguments:
+ *
+ * pSrcDst - pointer to the coefficient buffer which contains the quantized
+ * coefficients (QF) of the current block
+ * pPredBufRow - pointer to the updated coefficient row buffer
+ * pPredBufCol - pointer to the updated coefficient column buffer Note:
+ * Buffer update: Update the AC prediction buffer (both row and
+ * column buffer).
+ *
+ * Return Value:
+ *
+ * OMX_Sts_NoErr - no error
+ * OMX_Sts_BadArgErr - bad arguments, if:
+ * - At least one of the pointers is NULL:
+ * pSrcDst, pPredBufRow, or pPredBufCol.
+ * - curQP <= 0,
+ * - predQP <= 0,
+ * - curQP >31,
+ * - predQP > 31,
+ * - preDir exceeds [1,2]
+ * - pSrcDst, pPredBufRow, or pPredBufCol is not 4-byte aligned.
+ *
+ */
+
+OMXResult omxVCM4P2_PredictReconCoefIntra(
+ OMX_S16 * pSrcDst,
+ OMX_S16 * pPredBufRow,
+ OMX_S16 * pPredBufCol,
+ OMX_INT curQP,
+ OMX_INT predQP,
+ OMX_INT predDir,
+ OMX_INT ACPredFlag,
+ OMXVCM4P2VideoComponent videoComp
+ )
+{
+ OMX_U8 flag;
+ /* Argument error checks */
+ armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
+ armRetArgErrIf(pPredBufRow == NULL, OMX_Sts_BadArgErr);
+ armRetArgErrIf(pPredBufCol == NULL, OMX_Sts_BadArgErr);
+ armRetArgErrIf(curQP <= 0, OMX_Sts_BadArgErr);
+ armRetArgErrIf(predQP <= 0, OMX_Sts_BadArgErr);
+ armRetArgErrIf(curQP > 31, OMX_Sts_BadArgErr);
+ armRetArgErrIf(predQP > 31, OMX_Sts_BadArgErr);
+ armRetArgErrIf((predDir != 1) && (predDir != 2), OMX_Sts_BadArgErr);
+ armRetArgErrIf(!armIs4ByteAligned(pSrcDst), OMX_Sts_BadArgErr);
+ armRetArgErrIf(!armIs4ByteAligned(pPredBufRow), OMX_Sts_BadArgErr);
+ armRetArgErrIf(!armIs4ByteAligned(pPredBufCol), OMX_Sts_BadArgErr);
+
+ flag = 0;
+ return armVCM4P2_ACDCPredict(
+ pSrcDst,
+ NULL,
+ pPredBufRow,
+ pPredBufCol,
+ curQP,
+ predQP,
+ predDir,
+ ACPredFlag,
+ videoComp,
+ flag,
+ NULL);
+
+}
+
+/* End of file */
+
+