omxVCM4P10_FilterDeblockingChroma_VerEdge_I.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_FilterDeblockingChroma_VerEdge_I.c
21 * OpenMAX DL: v1.0.2
22 * Revision:   9641
23 * Date:       Thursday, February 7, 2008
24 *
25 *
26 *
27 *
28 * H.264 deblocking 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_FilterDeblockingChroma_VerEdge_I   (6.3.3.3.3)
41 *
42 * Description:
43 * Performs in-place deblock filtering on four vertical edges of the chroma
44 * macroblock (8x8).
45 *
46 * Input Arguments:
47 *
48 *   pSrcDst - Pointer to the input macroblock; must be 8-byte aligned.
49 *   srcdstStep - Step of the arrays; must be a multiple of 8.
50 *   pAlpha - Array of size 2 of alpha thresholds (the first item is alpha
51 *            threshold for external vertical edge, and the second item is for
52 *            internal vertical edge); per [ISO14496-10] alpha values must be
53 *            in the range [0,255].
54 *   pBeta - Array of size 2 of beta thresholds (the first item is the beta
55 *            threshold for the external vertical edge, and the second item is
56 *            for the internal vertical edge); per [ISO14496-10] beta values
57 *            must be in the range [0,18].
58 *   pThresholds - Array of size 8 containing thresholds, TC0, for the left
59 *            vertical edge of each 4x2 chroma block, arranged in vertical
60 *            block order; must be aligned on a 4-byte boundary.  Per
61 *            [ISO14496-10] values must be in the range [0,25].
62 *   pBS - Array of size 16 of BS parameters (values for each 2x2 chroma
63 *            block, arranged in vertical block order). This parameter is the
64 *            same as the pBSparameter passed into FilterDeblockLuma_VerEdge;
65 *            valid in the range [0,4] with the following restrictions: i)
66 *            pBS[i]== 4 may occur only for 0<=i<=3, ii) pBS[i]== 4 if and
67 *            only if pBS[i^3]== 4.  Must be 4 byte aligned.
68 *
69 * Output Arguments:
70 *
71 *   pSrcDst -Pointer to filtered output macroblock.
72 *
73 * Return Value:
74 *
75 *    OMX_Sts_NoErr, if the function runs without error.
76 *
77 *    OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs:
78 *    -    one or more of the following pointers is NULL: pSrcDst, pAlpha,
79 *              pBeta, pThresholds, or pBS.
80 *    -    pSrcDst is not 8-byte aligned.
81 *    -    srcdstStep is not a multiple of 8.
82 *    -    pThresholds is not 4-byte aligned.
83 *    -    pAlpha[0] and/or pAlpha[1] is outside the range [0,255].
84 *    -    pBeta[0] and/or pBeta[1] is outside the range [0,18].
85 *    -    One or more entries in the table pThresholds[0..7] is outside
86 *         of the range [0,25].
87 *    -    pBS is out of range, i.e., one of the following conditions is true:
88 *         pBS[i]<0, pBS[i]>4, pBS[i]==4 for i>=4, or
89 *         (pBS[i]==4 && pBS[i^3]!=4) for 0<=i<=3.
90 *    -    pBS is not 4-byte aligned.
91 *
92 */
93
94OMXResult omxVCM4P10_FilterDeblockingChroma_VerEdge_I(
95     OMX_U8* pSrcDst,
96     OMX_S32 srcdstStep,
97     const OMX_U8* pAlpha,
98     const OMX_U8* pBeta,
99     const OMX_U8* pThresholds,
100     const OMX_U8 *pBS
101 )
102{
103    int I, X, Y, Internal=0;
104
105    armRetArgErrIf(pSrcDst == NULL,                 OMX_Sts_BadArgErr);
106    armRetArgErrIf(armNot8ByteAligned(pSrcDst),     OMX_Sts_BadArgErr);
107    armRetArgErrIf(srcdstStep & 7,                  OMX_Sts_BadArgErr);
108    armRetArgErrIf(pAlpha == NULL,                  OMX_Sts_BadArgErr);
109    armRetArgErrIf(pBeta == NULL,                   OMX_Sts_BadArgErr);
110    armRetArgErrIf(pThresholds == NULL,             OMX_Sts_BadArgErr);
111    armRetArgErrIf(armNot4ByteAligned(pThresholds), OMX_Sts_BadArgErr);
112    armRetArgErrIf(pBS == NULL,                     OMX_Sts_BadArgErr);
113    armRetArgErrIf(armNot4ByteAligned(pBS),         OMX_Sts_BadArgErr);
114    armRetArgErrIf(pBeta[0] > 18,  OMX_Sts_BadArgErr);
115    armRetArgErrIf(pBeta[1] > 18,  OMX_Sts_BadArgErr);
116
117    for (X=0; X<8; X+=4, Internal=1)
118    {
119        for (Y=0; Y<8; Y++)
120        {
121            I = (Y>>1)+4*(X>>1);
122
123            armRetArgErrIf(pBS[I] > 4, OMX_Sts_BadArgErr);
124
125            armRetArgErrIf( (I > 3) && (pBS[I] == 4),
126                            OMX_Sts_BadArgErr);
127
128            armRetArgErrIf( ( (pBS[I] == 4) && (pBS[I^3] != 4) ),
129                            OMX_Sts_BadArgErr);
130            armRetArgErrIf(pThresholds[Y] > 25, OMX_Sts_BadArgErr);
131
132
133            /* Filter vertical edge with q0 at (X,Y) */
134            armVCM4P10_DeBlockPixel(
135                pSrcDst + Y*srcdstStep + X,
136                1,
137                pThresholds[(Y>>1)+4*(X>>2)],
138                pAlpha[Internal],
139                pBeta[Internal],
140                pBS[I],
141                1);
142        }
143    }
144
145    return OMX_Sts_NoErr;
146}
147