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
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfx2DGlue.h"
#include "YCbCrUtils.h"
#include "yuv_convert.h"
#include "ycbcr_to_rgb565.h"
namespace mozilla {
namespace gfx {
void
GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
SurfaceFormat& aSuggestedFormat,
IntSize& aSuggestedSize)
{
YUVType yuvtype =
TypeFromSize(aData.mYSize.width,
aData.mYSize.height,
aData.mCbCrSize.width,
aData.mCbCrSize.height);
// 'prescale' is true if the scaling is to be done as part of the
// YCbCr to RGB conversion rather than on the RGB data when rendered.
bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
aSuggestedSize != aData.mPicSize;
if (aSuggestedFormat == SurfaceFormat::R5G6B5_UINT16) {
#if defined(HAVE_YCBCR_TO_RGB565)
if (prescale &&
!IsScaleYCbCrToRGB565Fast(aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aSuggestedSize.width,
aSuggestedSize.height,
yuvtype,
FILTER_BILINEAR) &&
IsConvertYCbCrToRGB565Fast(aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
yuvtype)) {
prescale = false;
}
#else
// yuv2rgb16 function not available
aSuggestedFormat = SurfaceFormat::B8G8R8X8;
#endif
}
else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
// No other formats are currently supported.
aSuggestedFormat = SurfaceFormat::B8G8R8X8;
}
if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
/* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
See bugs 639415 and 640073. */
if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
prescale = false;
}
if (!prescale) {
aSuggestedSize = aData.mPicSize;
}
}
void
ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
const SurfaceFormat& aDestFormat,
const IntSize& aDestSize,
unsigned char* aDestBuffer,
int32_t aStride)
{
// ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
// luma plane is odd sized.
MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
(aData.mCbCrSize.height == aData.mYSize.height ||
aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
YUVType yuvtype =
TypeFromSize(aData.mYSize.width,
aData.mYSize.height,
aData.mCbCrSize.width,
aData.mCbCrSize.height);
// Convert from YCbCr to RGB now, scaling the image if needed.
if (aDestSize != aData.mPicSize) {
#if defined(HAVE_YCBCR_TO_RGB565)
if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
ScaleYCbCrToRGB565(aData.mYChannel,
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aDestSize.width,
aDestSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
FILTER_BILINEAR);
} else
#endif
ScaleYCbCrToRGB32(aData.mYChannel, //
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicSize.width,
aData.mPicSize.height,
aDestSize.width,
aDestSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
aData.mYUVColorSpace,
aData.mColorRange,
FILTER_BILINEAR);
} else { // no prescale
#if defined(HAVE_YCBCR_TO_RGB565)
if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
ConvertYCbCrToRGB565(aData.mYChannel,
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype);
} else // aDestFormat != SurfaceFormat::R5G6B5_UINT16
#endif
ConvertYCbCrToRGB32(aData.mYChannel, //
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
aData.mYUVColorSpace,
aData.mColorRange);
}
}
} // namespace gfx
} // namespace mozilla
|
