omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC.c revision 78e52bfac041d71ce53b5b13c2abf78af742b09d 
1/*
2 * Copyright (C) 2007-2008 ARM Limited
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17/* ----------------------------------------------------------------
18 *
19 *
20 * File Name:  omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC.c
21 * OpenMAX DL: v1.0.2
22 * Revision:   9641
23 * Date:       Thursday, February 7, 2008
24 *
25 *
26 *
27 *
28 * H.264 decode coefficients module
29 *
30 */
31
32#include "omxtypes.h"
33#include "armOMX.h"
34#include "omxVC.h"
35
36#include "armCOMM.h"
37#include "armVC.h"
38
39/**
40 * Function: omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC
41 *
42 * Description:
43 * Performs CAVLC decoding and inverse raster scan for 2x2 block of
44 * ChromaDCLevel. The decoded coefficients in packed position-coefficient
45 * buffer are stored in increasing raster scan order, namely position order.
46 *
47 * Remarks:
48 *
49 * Parameters:
50 * [in]	ppBitStream		Double pointer to current byte in bit stream
51 *								buffer
52 * [in]	pOffset			Pointer to current bit position in the byte
53 *								pointed to by *ppBitStream
54 * [out]	ppBitStream		*ppBitStream is updated after each block is decoded
55 * [out]	pOffset			*pOffset is updated after each block is decoded
56 * [out]	pNumCoeff		Pointer to the number of nonzero coefficients
57 *								in this block
58 * [out]	ppPosCoefbuf	Double pointer to destination residual
59 *								coefficient-position pair buffer
60 *
61 * Return Value:
62 * Standard omxError result. See enumeration for possible result codes.
63 *
64 */
65
66OMXResult omxVCM4P10_DecodeChromaDcCoeffsToPairCAVLC (
67     const OMX_U8** ppBitStream,
68     OMX_S32* pOffset,
69     OMX_U8* pNumCoeff,
70     OMX_U8** ppPosCoefbuf
71 )
72
73{
74    return armVCM4P10_DecodeCoeffsToPair(ppBitStream, pOffset, pNumCoeff,
75                                         ppPosCoefbuf, 17, 4);
76
77}
78