1 files changed, 131 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_TransformDequantChromaDCFromPair.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_TransformDequantChromaDCFromPair.c
new file mode 100644
index 0000000..9ad0e81
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_TransformDequantChromaDCFromPair.c
@@ -0,0 +1,131 @@
+/* ----------------------------------------------------------------
+ *
+ * 
+ * File Name:  omxVCM4P10_TransformDequantChromaDCFromPair.c
+ * OpenMAX DL: v1.0.2
+ * Revision:   9641
+ * Date:       Thursday, February 7, 2008
+ * 
+ * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
+ * 
+ * 
+ *
+ * H.264 inverse quantize and transform module
+ * 
+ */
+ 
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+#include "armVC.h"
+
+/*
+ * Description:
+ * Dequantize Chroma 2x2 DC block
+ */
+
+static void DequantChromaDC2x2(
+     OMX_S16* pDst,
+     OMX_INT QP        
+)
+{
+    int Shift = (QP/6)-1 ;
+    int Scale = armVCM4P10_VMatrix[QP%6][0];
+    int i, Value;
+
+    if (Shift >= 0)
+    {
+        for (i=0; i<4; i++)
+        {
+            Value = (pDst[i] * Scale) << Shift;
+            pDst[i] = (OMX_S16)Value;
+        }
+    }
+    else
+    {
+        for (i=0; i<4; i++)
+        {
+            Value = (pDst[i] * Scale) >> 1;
+            pDst[i] = (OMX_S16)Value;
+        }
+    }
+}
+ 
+
+/*
+ * Description:
+ * Inverse Transform DC 2x2 Coefficients
+ */
+
+static void InvTransformDC2x2(OMX_S16* pData)
+{
+    int c00 = pData[0];
+    int c01 = pData[1];
+    int c10 = pData[2];
+    int c11 = pData[3];
+
+    int d00 = c00 + c01;
+    int d01 = c00 - c01;
+    int d10 = c10 + c11;
+    int d11 = c10 - c11;
+
+    pData[0] = (OMX_S16)(d00 + d10);
+    pData[1] = (OMX_S16)(d01 + d11);
+    pData[2] = (OMX_S16)(d00 - d10);
+    pData[3] = (OMX_S16)(d01 - d11);
+}
+
+
+/**
+ * Function:  omxVCM4P10_TransformDequantChromaDCFromPair   (6.3.4.2.2)
+ *
+ * Description:
+ * Reconstruct the 2x2 ChromaDC block from coefficient-position pair buffer, 
+ * perform integer inverse transformation, and dequantization for 2x2 chroma 
+ * DC coefficients, and update the pair buffer pointer to next non-empty 
+ * block. 
+ *
+ * Input Arguments:
+ *   
+ *   ppSrc - Double pointer to residual coefficient-position pair buffer 
+ *            output by CALVC decoding 
+ *   QP - Quantization parameter QpC 
+ *
+ * Output Arguments:
+ *   
+ *   ppSrc - *ppSrc is updated to the start of next non empty block 
+ *   pDst - Pointer to the reconstructed 2x2 ChromaDC coefficients buffer; 
+ *            must be aligned on a 4-byte boundary. 
+ *
+ * Return Value:
+ *    OMX_Sts_NoErr, if the function runs without error.
+ *    OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs: 
+ *    -    ppSrc or pDst is NULL. 
+ *    -    pDst is not 4-byte aligned. 
+ *    -    QP is not in the range of [0-51]. 
+ *
+ */
+
+OMXResult omxVCM4P10_TransformDequantChromaDCFromPair(
+     const OMX_U8 **ppSrc,
+     OMX_S16* pDst,
+     OMX_INT QP        
+ )
+{
+    armRetArgErrIf(ppSrc  == NULL,           OMX_Sts_BadArgErr);
+    armRetArgErrIf(*ppSrc == NULL,           OMX_Sts_BadArgErr);
+    armRetArgErrIf(pDst   == NULL,           OMX_Sts_BadArgErr);
+    armRetArgErrIf(armNot4ByteAligned(pDst), OMX_Sts_BadArgErr);
+    armRetArgErrIf(QP<0,                     OMX_Sts_BadArgErr);
+    armRetArgErrIf(QP>51,                    OMX_Sts_BadArgErr);
+
+    armVCM4P10_UnpackBlock2x2(ppSrc, pDst);
+    InvTransformDC2x2(pDst);
+    DequantChromaDC2x2(pDst, QP);
+
+    return OMX_Sts_NoErr;
+}
+
+/* End of file */