2.7.1. Packed YUV formats¶
2.7.1.1. Description¶
Similar to the packed RGB formats these formats store the Y, Cb and Cr component of each pixel in one 16 or 32 bit word.
Identifier |
Code |
Byte 0 in memory |
Byte 1 |
Byte 2 |
Byte 3 |
||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
||
|
'Y444' |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
a3 |
a2 |
a1 |
a0 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
||||||||||||||||
|
'YUVO' |
Cb2 |
Cb1 |
Cb0 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
a |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
Cb4 |
Cb3 |
||||||||||||||||
|
'YUVP' |
Cb2 |
Cb1 |
Cb0 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
Cb5 |
Cb4 |
Cb3 |
||||||||||||||||
|
'YUV4' |
a7 |
a6 |
a5 |
a4 |
a3 |
a2 |
a1 |
a0 |
Y'7 |
Y'6 |
Y'5 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
Cb7 |
Cb6 |
Cb5 |
Cb4 |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Cr7 |
Cr6 |
Cr5 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
|
'AYUV' |
a7 |
a6 |
a5 |
a4 |
a3 |
a2 |
a1 |
a0 |
Y'7 |
Y'6 |
Y'5 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
Cb7 |
Cb6 |
Cb5 |
Cb4 |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Cr7 |
Cr6 |
Cr5 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
|
'XYUV' |
Y'7 |
Y'6 |
Y'5 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
Cb7 |
Cb6 |
Cb5 |
Cb4 |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Cr7 |
Cr6 |
Cr5 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
||||||||
|
'VUYA' |
Cr7 |
Cr6 |
Cr5 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
Cb7 |
Cb6 |
Cb5 |
Cb4 |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Y'7 |
Y'6 |
Y'5 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
a7 |
a6 |
a5 |
a4 |
a3 |
a2 |
a1 |
a0 |
|
'VUYX' |
Cr7 |
Cr6 |
Cr5 |
Cr4 |
Cr3 |
Cr2 |
Cr1 |
Cr0 |
Cb7 |
Cb6 |
Cb5 |
Cb4 |
Cb3 |
Cb2 |
Cb1 |
Cb0 |
Y'7 |
Y'6 |
Y'5 |
Y'4 |
Y'3 |
Y'2 |
Y'1 |
Y'0 |
||||||||
注釈
Bit 7 is the most significant bit;
The value of a = alpha bits is undefined when reading from the driver, ignored when writing to the driver, except when alpha blending has been negotiated for a Video Overlay or Video Output Overlay for the formats Y444, YUV555 and YUV4. However, for formats AYUV32 and VUYA32, the alpha component is expected to contain a meaningful value that can be used by drivers and applications. And, the formats XYUV32 and VUYX32 contain undefined alpha values that must be ignored by all applications and drivers.