omxVCM4P2_TransRecBlockCoef_inter.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 * File Name:  omxVCM4P2_TransRecBlockCoef_inter.c
20 * OpenMAX DL: v1.0.2
21 * Revision:   9641
22 * Date:       Thursday, February 7, 2008
23 *
24 *
25 *
26 *
27 * Description:
28 * Contains modules DCT->quant and reconstructing the inter texture data
29 *
30 */
31
32#include "omxtypes.h"
33#include "armOMX.h"
34#include "omxVC.h"
35
36#include "armCOMM.h"
37
38
39/**
40 * Function:  omxVCM4P2_TransRecBlockCoef_inter   (6.2.4.4.5)
41 *
42 * Description:
43 * Implements DCT, and quantizes the DCT coefficients of the inter block
44 * while reconstructing the texture residual. There is no boundary check for
45 * the bit stream buffer.
46 *
47 * Input Arguments:
48 *
49 *   pSrc -pointer to the residuals to be encoded; must be aligned on an
50 *            16-byte boundary.
51 *   QP - quantization parameter.
52 *   shortVideoHeader - binary flag indicating presence of short_video_header;
53 *                      shortVideoHeader==1 selects linear intra DC mode, and
54 *                      shortVideoHeader==0 selects non linear intra DC mode.
55 *
56 * Output Arguments:
57 *
58 *   pDst - pointer to the quantized DCT coefficients buffer; must be aligned
59 *            on a 16-byte boundary.
60 *   pRec - pointer to the reconstructed texture residuals; must be aligned
61 *            on a 16-byte boundary.
62 *
63 * Return Value:
64 *
65 *    OMX_Sts_NoErr - no error
66 *    OMX_Sts_BadArgErr - bad arguments:
67 *    -    At least one of the following pointers is either NULL or
68 *         not 16-byte aligned:
69 *            - pSrc
70 *            - pDst
71 *            - pRec
72 *    -    QP <= 0 or QP >= 32.
73 *
74 */
75
76OMXResult omxVCM4P2_TransRecBlockCoef_inter(
77     const OMX_S16 *pSrc,
78     OMX_S16 * pDst,
79     OMX_S16 * pRec,
80     OMX_U8 QP,
81     OMX_INT shortVideoHeader
82)
83{
84    /* 64 elements are needed but to align it to 16 bytes need
85    8 more elements of padding */
86    OMX_S16 tempBuffer[72];
87    OMX_S16 *pTempBuffer;
88    OMX_INT i;
89
90    /* Aligning the local buffers */
91    pTempBuffer = armAlignTo16Bytes(tempBuffer);
92
93    /* Argument error checks */
94    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr);
95    armRetArgErrIf(pRec == NULL, OMX_Sts_BadArgErr);
96    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
97    armRetArgErrIf(!armIs16ByteAligned(pSrc), OMX_Sts_BadArgErr);
98    armRetArgErrIf(!armIs16ByteAligned(pRec), OMX_Sts_BadArgErr);
99    armRetArgErrIf(!armIs16ByteAligned(pDst), OMX_Sts_BadArgErr);
100    armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
101
102    omxVCM4P2_DCT8x8blk (pSrc, pDst);
103    omxVCM4P2_QuantInter_I(
104     pDst,
105     QP,
106     shortVideoHeader);
107
108    for (i = 0; i < 64; i++)
109    {
110        pTempBuffer[i] = pDst[i];
111    }
112
113    omxVCM4P2_QuantInvInter_I(
114     pTempBuffer,
115     QP);
116    omxVCM4P2_IDCT8x8blk (pTempBuffer, pRec);
117
118    return OMX_Sts_NoErr;
119}
120
121/* End of file */
122
123
124