1 files changed, 109 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_Interpolate_Chroma.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_Interpolate_Chroma.c
new file mode 100644
index 0000000..1507d23
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_Interpolate_Chroma.c
@@ -0,0 +1,109 @@
+/**
+ * 
+ * File Name:  armVCM4P10_Interpolate_Chroma.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 interpolation for chroma components
+ * 
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+
+#include "armCOMM.h"
+
+/**
+ * Function: armVCM4P10_Interpolate_Chroma
+ *
+ * Description:
+ * This function performs interpolation for chroma components.
+ *
+ * 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
+ *  [in]    dx              Fractional part of horizontal motion vector 
+ *                                              component in 1/8 pixel unit (0~7) 
+ *  [in]    dy              Fractional part of vertical motion vector 
+ *                                              component in 1/8 pixel unit (0~7)
+ *  [out]   pDst            Pointer to the interpolation buffer
+ *
+ * Return Value:
+ * Standard OMXResult value.
+ *
+ */
+ OMXResult armVCM4P10_Interpolate_Chroma(
+        OMX_U8      *pSrc,
+        OMX_U32     iSrcStep,
+        OMX_U8      *pDst,
+        OMX_U32     iDstStep,
+        OMX_U32     iWidth,
+        OMX_U32     iHeight,
+        OMX_U32     dx,
+        OMX_U32     dy
+)
+{
+    OMX_U32     EightMinusdx = 8 - dx;
+    OMX_U32     EightMinusdy = 8 - dy;
+    OMX_U32     ACoeff, BCoeff, CCoeff, DCoeff;
+    OMX_U32     x, y;
+
+    /* check for argument error */
+    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr)
+    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr)
+    armRetArgErrIf(dx > 7, OMX_Sts_BadArgErr)
+    armRetArgErrIf(dy > 7, OMX_Sts_BadArgErr)
+    armRetArgErrIf(iSrcStep == 0, OMX_Sts_BadArgErr)
+    armRetArgErrIf(iDstStep == 0, OMX_Sts_BadArgErr)
+    armRetArgErrIf(iWidth == 0, OMX_Sts_BadArgErr)
+    armRetArgErrIf(iHeight == 0, OMX_Sts_BadArgErr)
+    
+    /* if fractionl mv is not (0, 0) */
+    if (dx != 0 || dy != 0)
+    {
+        ACoeff = EightMinusdx * EightMinusdy;
+        BCoeff = dx * EightMinusdy;
+        CCoeff = EightMinusdx * dy;
+        DCoeff = dx * dy;
+
+        for (y = 0; y < iHeight; y++)
+        {
+            for (x = 0; x < iWidth; x++)
+            {
+                pDst [y * iDstStep + x] = (
+                    ACoeff * pSrc [y * iSrcStep + x] +
+                    BCoeff * pSrc [y * iSrcStep + x + 1] +
+                    CCoeff * pSrc [(y + 1) * iSrcStep + x] +
+                    DCoeff * pSrc [(y + 1) * iSrcStep + x + 1] +
+                    32) >> 6;
+            }
+        }
+    }
+    else
+    {
+        for (y = 0; y < iHeight; y++)
+        {
+            for (x = 0; x < iWidth; x++)
+            {
+                pDst [y * iDstStep + x] = pSrc [y * iSrcStep + x];
+            }
+        }
+    }
+
+    return OMX_Sts_NoErr;
+}
+
+/*****************************************************************************
+ *                              END OF FILE
+ *****************************************************************************/
+