--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/h263decoder/src/decblock.cpp	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,184 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - Initial contribution
+*
+* Contributors:
+* Ixonos Plc
+*
+* Description:  
+* Block decoding functions.
+*
+*/
+
+
+
+#include "h263dConfig.h"
+
+#include "decblock.h"
+#include "blkfunc.h"
+#include "viddemux.h"
+#include "idct.h"   
+
+
+/* {{-output"dblfree.txt"}} */
+/*
+ * dblFree
+ *    
+ *
+ * Parameters:
+ *    None.
+ *
+ * Function:
+ *    This function deinitializes the module.
+ *    Any functions of this module must not be called after dblFree (except 
+ *    for dblLoad).
+ *
+ * Returns:
+ *    >= 0  if succeeded
+ *    < 0   if failed
+ *
+ */
+
+int dblFree(void)
+/* {{-output"dblfree.txt"}} */
+{
+   return 0;
+}
+
+
+/* {{-output"dblload.txt"}} */
+/*
+ * dblLoad
+ *    
+ *
+ * Parameters:
+ *    None.
+ *
+ * Function:
+ *    This function initializes the module.
+ *    dblLoad has to be called before any other function of this module
+ *    is used.
+ *
+ * Returns:
+ *    >= 0  if succeeded
+ *    < 0   if failed
+ *
+ */
+
+int dblLoad(void)
+/* {{-output"dblload.txt"}} */
+{    
+   return 0;
+}
+
+
+/* {{-output"dblIdctAndDequant.txt"}} */
+/*
+ * dblIdctAndDequant
+ *
+ * Parameters:
+ *    block          block array (length 64)
+ *    quant          quantization information
+ *    skip           must be 1 if INTRADC is in the block, otherwise 0
+ *
+ * Function:
+ *    This function makes the dequantization, the clipping and the inverse
+ *    cosine transform for the given block.
+ *
+ * Returns:
+ *    Nothing.
+ *
+ * Error codes:
+ *    None.
+ *
+ */
+
+void dblIdctAndDequant(int *block, int quant, int skip)
+/* {{-output"dblIdctAndDequant.txt"}} */
+{
+
+   int rec, i, *tmpBlock, level;
+
+   /* See section 6.2.1 of H.263 Recommendation for Inverse Quantization
+      formulas. */
+
+   /* If odd quantization parameter */
+   if (quant & 1) {
+
+      for (i = 64 - skip, tmpBlock = block + skip; i; i--, tmpBlock++) {
+
+         if (!(*tmpBlock))
+            continue;
+
+         level = *tmpBlock;
+
+         if (level > 0) {
+            rec = quant * ((level << 1) + 1);
+            *tmpBlock = (rec < 2048) ? rec : 2047;
+         }
+
+         else {
+            rec = -(quant * (((-level) << 1) + 1));
+            *tmpBlock = (rec < -2048) ? -2048 : rec;
+         }
+      }
+   }
+
+   /* Else even quantization parameter */
+   else {
+
+      /* For loop copy-pasted from the previous case due to speed 
+         optimization */
+      for (i = 64 - skip, tmpBlock = block + skip; i; i--, tmpBlock++) {
+
+         if (!(*tmpBlock))
+            continue;
+
+         level = *tmpBlock;
+
+         if (level > 0) {
+            rec = quant * ((level << 1) + 1) - 1;
+            *tmpBlock = (rec < 2048) ? rec : 2047;
+         }
+
+         else {
+            rec = -(quant * (((-level) << 1) + 1) - 1);
+            *tmpBlock = (rec < -2048) ? -2048 : rec;
+         }
+      }
+   }
+   idct(block);
+}
+
+
+/*
+ * dblIdct
+ *
+ * Parameters:
+ *    block          block array (length 64)
+ *
+ * Function:
+ *    This function makes the inverse
+ *    cosine transform for the given block.
+ *
+ * Returns:
+ *    Nothing.
+ *
+ * Error codes:
+ *    None.
+ *
+ */
+
+void dblIdct(int *block)
+
+{
+   idct(block);
+}
+// End of File