1 files changed, 84 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfVer_Luma.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfVer_Luma.c
new file mode 100644
index 0000000..f7ecfc5
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/armVCM4P10_InterpolateHalfVer_Luma.c
@@ -0,0 +1,84 @@
+/**
+ * 
+ * File Name:  armVCM4P10_InterpolateHalfVer_Luma.c
+ * OpenMAX DL: v1.0.2
+ * Revision:   9641
+ * Date:       Thursday, February 7, 2008
+ * 
+ * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
+ * 
+ * 
+ * Description:
+ * This functions will help to calculate Half Pel luma interpolation
+ * 
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+#include "armVC.h"
+
+/**
+ * Function: armVCM4P10_InterpolateHalfVer_Luma
+ * 
+ * Description:
+ * This function performs interpolation for vertical 1/2-pel positions 
+ * around a full-pel position.
+ *
+ * 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
+ *  [out]   pDst        Pointer to the interpolation buffer of the 1/2-pel
+ *
+ * Return Value:
+ * Standard OMXResult value.
+ *
+ */
+
+OMXResult armVCM4P10_InterpolateHalfVer_Luma(   
+     const OMX_U8*    pSrc, 
+     OMX_U32    iSrcStep, 
+     OMX_U8*    pDst,
+     OMX_U32    iDstStep, 
+     OMX_U32    iWidth, 
+     OMX_U32    iHeight
+)
+{
+    OMX_S32     HalfCoeff, pos;
+    OMX_INT     y, x;
+
+    /* check for argument error */
+    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr)
+    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr)
+
+
+    for (y = 0; y < iHeight; y++)
+    {
+        for (x = 0; x < iWidth; x++)
+        {
+            pos = y * iSrcStep + x;
+            HalfCoeff = 
+                pSrc [pos - 2 * iSrcStep] - 
+                5 * pSrc [pos - 1 * iSrcStep] + 
+                20 * pSrc [pos] + 
+                20 * pSrc [pos + 1 * iSrcStep] - 
+                5 * pSrc [pos + 2 * iSrcStep] + 
+                pSrc [pos + 3 * iSrcStep];
+
+            HalfCoeff = (HalfCoeff + 16) >> 5;
+            HalfCoeff = armClip(0, 255, HalfCoeff);
+
+            pDst [y * iDstStep + x] = (OMX_U8) HalfCoeff;
+        }
+    }
+    
+    return OMX_Sts_NoErr;
+}
+