1 files changed, 88 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/comm/src/omxVCCOMM_ComputeTextureErrorBlock.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/comm/src/omxVCCOMM_ComputeTextureErrorBlock.c
new file mode 100644
index 0000000..e559adf
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/comm/src/omxVCCOMM_ComputeTextureErrorBlock.c
@@ -0,0 +1,88 @@
+/**
+ * 
+ * File Name:  omxVCCOMM_ComputeTextureErrorBlock.c
+ * OpenMAX DL: v1.0.2
+ * Revision:   9641
+ * Date:       Thursday, February 7, 2008
+ * 
+ * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
+ * 
+ * 
+ *
+ * Description:
+ * Contains module computing the error for a MB of size 8x8
+ * 
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+#include "armCOMM.h"
+
+/**
+ * Function:  omxVCCOMM_ComputeTextureErrorBlock   (6.1.4.1.2)
+ *
+ * Description:
+ * Computes the texture error of the block. 
+ *
+ * Input Arguments:
+ *   
+ *   pSrc - pointer to the source plane. This should be aligned on an 8-byte 
+ *            boundary. 
+ *   srcStep - step of the source plane 
+ *   pSrcRef - pointer to the reference buffer, an 8x8 block. This should be 
+ *            aligned on an 8-byte boundary. 
+ *
+ * Output Arguments:
+ *   
+ *   pDst - pointer to the destination buffer, an 8x8 block. This should be 
+ *            aligned on an 8-byte boundary. 
+ *
+ * Return Value:
+ *    
+ *    OMX_Sts_NoErr - no error 
+ *    OMX_Sts_BadArgErr - bad arguments:
+ *    -    At least one of the following pointers is NULL: 
+ *         pSrc, pSrcRef, pDst. 
+ *    -    pSrc is not 8-byte aligned. 
+ *    -    SrcStep <= 0 or srcStep is not a multiple of 8. 
+ *    -    pSrcRef is not 8-byte aligned. 
+ *    -    pDst is not 8-byte aligned 
+ *
+ */
+
+OMXResult omxVCCOMM_ComputeTextureErrorBlock(
+     const OMX_U8 *pSrc,
+     OMX_INT srcStep,
+     const OMX_U8 *pSrcRef,
+     OMX_S16 * pDst
+)
+{
+
+    OMX_INT     x, y, count;
+
+    /* Argument error checks */
+    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs8ByteAligned(pSrc), OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs8ByteAligned(pSrcRef), OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs8ByteAligned(pDst), OMX_Sts_BadArgErr);
+    armRetArgErrIf((srcStep <= 0) || (srcStep & 7), OMX_Sts_BadArgErr);
+
+    /* Calculate the error block */
+    for (y = 0, count = 0;
+         y < 8;
+         y++, pSrc += srcStep)
+    {
+        for (x = 0; x < 8; x++, count++)
+        {
+            pDst[count] = pSrc[x] - pSrcRef[count];
+        }
+    }
+
+    return OMX_Sts_NoErr;
+
+}
+
+/* End of file */