1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* Copyright (C) 2007-2008 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/* ----------------------------------------------------------------
*
*
* File Name: omxVCM4P10_PredictIntra_16x16.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
*
*
*
* H.264 16x16 intra prediction module
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armCOMM.h"
#include "armVC.h"
/**
* Function: omxVCM4P10_PredictIntra_16x16 (6.3.3.1.2)
*
* Description:
* Perform Intra_16x16 prediction for luma samples. If the upper-right block
* is not available, then duplication work should be handled inside the
* function. Users need not define them outside.
*
* Input Arguments:
*
* pSrcLeft - Pointer to the buffer of 16 left pixels: p[x, y] (x = -1, y =
* 0..15)
* pSrcAbove - Pointer to the buffer of 16 above pixels: p[x,y] (x = 0..15,
* y= -1); must be aligned on a 16-byte boundary.
* pSrcAboveLeft - Pointer to the above left pixels: p[x,y] (x = -1, y = -1)
* leftStep - Step of left pixel buffer; must be a multiple of 16.
* dstStep - Step of the destination buffer; must be a multiple of 16.
* predMode - Intra_16x16 prediction mode, please refer to section 3.4.1.
* availability - Neighboring 16x16 MB availability flag. Refer to
* section 3.4.4.
*
* Output Arguments:
*
* pDst -Pointer to the destination buffer; must be aligned on a 16-byte
* boundary.
*
* Return Value:
* If the function runs without error, it returns OMX_Sts_NoErr.
* If one of the following cases occurs, the function returns
* OMX_Sts_BadArgErr:
* pDst is NULL.
* dstStep < 16. or dstStep is not a multiple of 16.
* leftStep is not a multiple of 16.
* predMode is not in the valid range of enumeration
* OMXVCM4P10Intra16x16PredMode
* predMode is OMX_VC_16X16_VERT, but availability doesn't set
* OMX_VC_UPPER indicating p[x,-1] (x = 0..15) is not available.
* predMode is OMX_VC_16X16_HOR, but availability doesn't set OMX_VC_LEFT
* indicating p[-1,y] (y = 0..15) is not available.
* predMode is OMX_VC_16X16_PLANE, but availability doesn't set
* OMX_VC_UPPER_LEFT or OMX_VC_UPPER or OMX_VC_LEFT indicating
* p[x,-1](x = 0..15), or p[-1,y] (y = 0..15), or p[-1,-1] is not
* available.
* availability sets OMX_VC_UPPER, but pSrcAbove is NULL.
* availability sets OMX_VC_LEFT, but pSrcLeft is NULL.
* availability sets OMX_VC_UPPER_LEFT, but pSrcAboveLeft is NULL.
* either pSrcAbove or pDst is not aligned on a 16-byte boundary.
*
* Note:
* pSrcAbove, pSrcAbove, pSrcAboveLeft may be invalid pointers if
* they are not used by intra prediction implied in predMode.
* Note:
* OMX_VC_UPPER_RIGHT is not used in intra_16x16 luma prediction.
*
*/
OMXResult omxVCM4P10_PredictIntra_16x16(
const OMX_U8* pSrcLeft,
const OMX_U8 *pSrcAbove,
const OMX_U8 *pSrcAboveLeft,
OMX_U8* pDst,
OMX_INT leftStep,
OMX_INT dstStep,
OMXVCM4P10Intra16x16PredMode predMode,
OMX_S32 availability)
{
int x,y,Sum,Count;
int H,V,a,b,c;
armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(dstStep < 16, OMX_Sts_BadArgErr);
armRetArgErrIf((dstStep % 16) != 0, OMX_Sts_BadArgErr);
armRetArgErrIf((leftStep % 16) != 0, OMX_Sts_BadArgErr);
armRetArgErrIf(armNot16ByteAligned(pSrcAbove), OMX_Sts_BadArgErr);
armRetArgErrIf(armNot16ByteAligned(pDst), OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_UPPER) && pSrcAbove == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_LEFT ) && pSrcLeft == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_UPPER_LEFT) && pSrcAboveLeft == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_16X16_VERT && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_16X16_HOR && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_16X16_PLANE && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_16X16_PLANE && !(availability & OMX_VC_UPPER_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_16X16_PLANE && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf((unsigned)predMode > OMX_VC_16X16_PLANE, OMX_Sts_BadArgErr);
switch (predMode)
{
case OMX_VC_16X16_VERT:
for (y=0; y<16; y++)
{
for (x=0; x<16; x++)
{
pDst[y*dstStep+x] = pSrcAbove[x];
}
}
break;
case OMX_VC_16X16_HOR:
for (y=0; y<16; y++)
{
for (x=0; x<16; x++)
{
pDst[y*dstStep+x] = pSrcLeft[y*leftStep];
}
}
break;
case OMX_VC_16X16_DC:
/* This can always be used even if no blocks available */
Sum = 0;
Count = 0;
if (availability & OMX_VC_LEFT)
{
for (y=0; y<16; y++)
{
Sum += pSrcLeft[y*leftStep];
}
Count++;
}
if (availability & OMX_VC_UPPER)
{
for (x=0; x<16; x++)
{
Sum += pSrcAbove[x];
}
Count++;
}
if (Count==0)
{
Sum = 128;
}
else if (Count==1)
{
Sum = (Sum + 8) >> 4;
}
else /* Count = 2 */
{
Sum = (Sum + 16) >> 5;
}
for (y=0; y<16; y++)
{
for (x=0; x<16; x++)
{
pDst[y*dstStep+x] = (OMX_U8)Sum;
}
}
break;
case OMX_VC_16X16_PLANE:
H = 8*(pSrcAbove[15] - pSrcAboveLeft[0]);
for (x=6; x>=0; x--)
{
H += (x+1)*(pSrcAbove[8+x] - pSrcAbove[6-x]);
}
V = 8*(pSrcLeft[15*leftStep] - pSrcAboveLeft[0]);
for (y=6; y>=0; y--)
{
V += (y+1)*(pSrcLeft[(8+y)*leftStep] - pSrcLeft[(6-y)*leftStep]);
}
a = 16*(pSrcAbove[15] + pSrcLeft[15*leftStep]);
b = (5*H+32)>>6;
c = (5*V+32)>>6;
for (y=0; y<16; y++)
{
for (x=0; x<16; x++)
{
Sum = (a + b*(x-7) + c*(y-7) + 16)>>5;
pDst[y*dstStep+x] = (OMX_U8)armClip(0,255,Sum);
}
}
break;
}
return OMX_Sts_NoErr;
}
|
