1 files changed, 120 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_Inter.c b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_Inter.c
new file mode 100644
index 0000000..88a8d04
--- /dev/null
+++ b/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_Inter.c
@@ -0,0 +1,120 @@
+/**
+ * 
+ * File Name:  omxVCM4P2_DecodeVLCZigzag_Inter.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 zigzag scanning and VLC decoding
+ * for inter block.
+ *
+ */
+
+#include "omxtypes.h"
+#include "armOMX.h"
+#include "omxVC.h"
+
+#include "armVC.h"
+#include "armCOMM_Bitstream.h"
+#include "armCOMM.h"
+#include "armVCM4P2_Huff_Tables_VLC.h"
+#include "armVCM4P2_ZigZag_Tables.h"
+
+
+
+/**
+ * Function:  omxVCM4P2_DecodeVLCZigzag_Inter   (6.2.5.2.3)
+ *
+ * Description:
+ * Performs VLC decoding and inverse zigzag scan for one inter-coded block. 
+ *
+ * Input Arguments:
+ *   
+ *   ppBitStream - double pointer to the current byte in the stream buffer 
+ *   pBitOffset - pointer to the next available bit in the current stream 
+ *            byte referenced by *ppBitStream. The parameter *pBitOffset is 
+ *            valid within the range [0-7]. 
+ *   shortVideoHeader - binary flag indicating presence of 
+ *            short_video_header; escape modes 0-3 are used if 
+ *            shortVideoHeader==0, and escape mode 4 is used when 
+ *            shortVideoHeader==1. 
+ *
+ * Output Arguments:
+ *   
+ *   ppBitStream - *ppBitStream is updated after the block is decoded such 
+ *            that it points to the current byte in the stream buffer 
+ *   pBitOffset - *pBitOffset is updated after decoding such that it points 
+ *            to the next available bit in the stream byte referenced by 
+ *            *ppBitStream 
+ *   pDst - pointer to the coefficient buffer of current block; must be 
+ *            4-byte aligned. 
+ *
+ * Return Value:
+ *    
+ *    OMX_Sts_BadArgErr - bad arguments:
+ *    -    At least one of the following pointers is NULL: 
+ *         ppBitStream, *ppBitStream, pBitOffset, pDst
+ *    -    pDst is not 4-byte aligned
+ *    -   *pBitOffset exceeds [0,7]
+ *    OMX_Sts_Err - status error, if:
+ *    -    At least one mark bit is equal to zero 
+ *    -    Encountered an illegal stream code that cannot be found in the VLC table 
+ *    -    Encountered an illegal code in the VLC FLC table 
+ *    -    The number of coefficients is greater than 64 
+ *
+ */
+
+OMXResult omxVCM4P2_DecodeVLCZigzag_Inter(
+     const OMX_U8 ** ppBitStream,
+     OMX_INT * pBitOffset,
+     OMX_S16 * pDst,
+     OMX_INT shortVideoHeader
+)
+{
+    OMX_U8  last,start = 0;
+    const OMX_U8  *pZigzagTable = armVCM4P2_aClassicalZigzagScan;
+    OMXResult errorCode;
+    
+    /* Argument error checks */
+    armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
+    armRetArgErrIf(!armIs4ByteAligned(pDst), OMX_Sts_BadArgErr);
+
+    errorCode = armVCM4P2_GetVLCBits (
+              ppBitStream,
+              pBitOffset,
+			  pDst,
+			  shortVideoHeader,
+              start,
+			  &last,
+			  11,
+			  42,
+			   2,
+			   5,
+              armVCM4P2_InterL0RunIdx,
+              armVCM4P2_InterVlcL0,
+			  armVCM4P2_InterL1RunIdx,
+              armVCM4P2_InterVlcL1,
+              armVCM4P2_InterL0LMAX,
+              armVCM4P2_InterL1LMAX,
+              armVCM4P2_InterL0RMAX,
+              armVCM4P2_InterL1RMAX,
+              pZigzagTable );
+    armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode);
+    
+    if (last == 0)
+    {
+        return OMX_Sts_Err;
+    }
+    return OMX_Sts_NoErr;
+}
+
+/* End of file */
+