1 files changed, 92 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_IDCT8x8blk.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_IDCT8x8blk.c
new file mode 100644
index 0000000..1886d92
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_IDCT8x8blk.c
@@ -0,0 +1,92 @@
+/**
+ * 
+ * File Name:  omxVCM4P2_IDCT8x8blk.c
+ * OpenMAX DL: v1.0.2
+ * Revision:   9641
+ * Date:       Thursday, February 7, 2008
+ * 
+ * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
+ * 
+ * 
+ *
+ * Description:
+ * Contains modules for 8x8 block IDCT
+ * 
+ */
+
+
+#include <math.h>
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+#include "armVCM4P2_DCT_Table.h"
+
+/**
+ * Function:  omxVCM4P2_IDCT8x8blk   (6.2.3.2.1)
+ *
+ * Description:
+ * Computes a 2D inverse DCT for a single 8x8 block, as defined in 
+ * [ISO14496-2]. 
+ *
+ * Input Arguments:
+ *   
+ *   pSrc - pointer to the start of the linearly arranged IDCT input buffer; 
+ *            must be aligned on a 16-byte boundary.  According to 
+ *            [ISO14496-2], the input coefficient values should lie within the 
+ *            range [-2048, 2047]. 
+ *
+ * Output Arguments:
+ *   
+ *   pDst - pointer to the start of the linearly arranged IDCT output buffer; 
+ *            must be aligned on a 16-byte boundary. 
+ *
+ * Return Value:
+ *    
+ *    OMX_Sts_NoErr - no error 
+ *    OMX_Sts_BadArgErr - bad arguments:
+ *    -    pSrc or pDst is NULL. 
+ *    -    pSrc or pDst is not 16-byte aligned. 
+ *
+ */
+OMXResult omxVCM4P2_IDCT8x8blk (const OMX_S16 *pSrc, OMX_S16 *pDst)
+{
+    OMX_INT x, y, u, v;
+
+    /* Argument error checks */
+    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs16ByteAligned(pSrc), OMX_Sts_BadArgErr);
+    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs16ByteAligned(pDst), OMX_Sts_BadArgErr);
+
+    for (x = 0; x < 8; x++)
+    {
+        for (y = 0; y < 8; y++)
+        {
+            OMX_F64 sum = 0.0;
+            for (u = 0; u < 8; u++)
+            {
+                for (v = 0; v < 8; v++)
+                {
+                    sum += pSrc[(u * 8) + v] *
+                        armVCM4P2_preCalcDCTCos[x][u] *
+                        armVCM4P2_preCalcDCTCos[y][v];
+                }
+            }
+            pDst[(x * 8) + y] = (OMX_S16) floor(sum + 0.5);
+
+            /* Saturate to [-256, 255] */
+            pDst[(x * 8) + y] = armClip (
+                                            -256,
+                                            255,
+                                            pDst[(x * 8) + y]);
+        }
+    }
+
+    return OMX_Sts_NoErr;
+}
+
+/* End of file */
+
+