1 files changed, 153 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I.c
new file mode 100644
index 0000000..a946d7b
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I.c
@@ -0,0 +1,153 @@
+/**
+ * 
+ * File Name:  omxVCM4P2_QuantInvIntra_I.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 intra inverse Quantization
+ * 
+ */ 
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armCOMM.h"
+
+/**
+ * Function:  omxVCM4P2_QuantInvIntra_I   (6.2.5.3.2)
+ *
+ * Description:
+ * Performs the second inverse quantization mode on an intra/inter coded 
+ * block. Supports bits_per_pixel = 8. The output coefficients are clipped to 
+ * the range [-2048, 2047]. 
+ *
+ * Input Arguments:
+ *   
+ *   pSrcDst - pointer to the input (quantized) intra/inter block; must be 
+ *            aligned on a 16-byte boundary. 
+ *   QP - quantization parameter (quantizer_scale) 
+ *   videoComp - video component type of the current block. Takes one of the 
+ *            following flags: OMX_VC_LUMINANCE, OMX_VC_CHROMINANCE (intra 
+ *            version only). 
+ *   shortVideoHeader - binary flag indicating presence of short_video_header 
+ *            (intra version only). 
+ *
+ * Output Arguments:
+ *   
+ *   pSrcDst - pointer to the output (dequantized) intra/inter block 
+ *
+ * Return Value:
+ *    
+ *    OMX_Sts_NoErr - no error 
+ *    OMX_Sts_BadArgErr - bad arguments; one or more of the following is 
+ *              true: 
+ *    -    pSrcDst is NULL 
+ *    -    QP <= 0 or QP >=31 
+ *    -    videoComp is neither OMX_VC_LUMINANCE nor OMX_VC_CHROMINANCE. 
+ *
+ */
+
+OMXResult omxVCM4P2_QuantInvIntra_I(
+     OMX_S16 * pSrcDst,
+     OMX_INT QP,
+     OMXVCM4P2VideoComponent videoComp,
+	 OMX_INT shortVideoHeader
+)
+{
+
+    /* Initialized to remove compilation error */
+    OMX_INT dcScaler = 0, coeffCount, Sign;
+
+    /* Argument error checks */
+    armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
+	armRetArgErrIf(((videoComp != OMX_VC_LUMINANCE) && (videoComp != OMX_VC_CHROMINANCE)), OMX_Sts_BadArgErr);
+    
+    /* Calculate the DC scaler value */
+    
+    /* linear intra DC mode */
+    if(shortVideoHeader)
+    {
+        dcScaler = 8;
+    }
+    /* nonlinear intra DC mode */
+    else
+    {
+    
+        if (videoComp == OMX_VC_LUMINANCE)
+        {
+            if (QP >= 1 && QP <= 4)
+            {
+                dcScaler = 8;
+            }
+            else if (QP >= 5 && QP <= 8)
+            {
+                dcScaler = 2 * QP;
+            }
+            else if (QP >= 9 && QP <= 24)
+            {
+                dcScaler = QP + 8;
+            }
+            else
+            {
+                dcScaler = (2 * QP) - 16;
+            }
+        }
+
+        else if (videoComp == OMX_VC_CHROMINANCE)
+        {
+            if (QP >= 1 && QP <= 4)
+            {
+                dcScaler = 8;
+            }
+            else if (QP >= 5 && QP <= 24)
+            {
+                dcScaler = (QP + 13)/2;
+            }
+            else
+            {
+                dcScaler = QP - 6;
+            }
+        }
+    }
+    /* Dequant the DC value, this applies to both the methods */
+    pSrcDst[0] = pSrcDst[0] * dcScaler;
+
+    /* Saturate */
+    pSrcDst[0] = armClip (-2048, 2047, pSrcDst[0]);
+
+    /* Second Inverse quantisation method */
+    for (coeffCount = 1; coeffCount < 64; coeffCount++)
+    {
+        /* check sign */
+        Sign =  armSignCheck (pSrcDst[coeffCount]);  
+
+        if (QP & 0x1)
+        {
+            pSrcDst[coeffCount] = (2* armAbs(pSrcDst[coeffCount]) + 1) * QP;
+            pSrcDst[coeffCount] *= Sign;
+        }
+        else
+        {
+            pSrcDst[coeffCount] =
+                                (2* armAbs(pSrcDst[coeffCount]) + 1) * QP - 1;
+            pSrcDst[coeffCount] *= Sign;
+        }
+
+        /* Saturate */
+        pSrcDst[coeffCount] = armClip (-2048, 2047, pSrcDst[coeffCount]);
+    }
+    return OMX_Sts_NoErr;
+
+}
+
+/* End of file */
+
+