2.6.1. Packed YUV formats¶
2.6.1.1. 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 | ||
V4L2_PIX_FMT_YUV444 |
‘Y444’ | Cb3 | Cb2 | Cb1 | Cb0 | Cr3 | Cr2 | Cr1 | Cr0 | a3 | a2 | a1 | a0 | Y’3 | Y’2 | Y’1 | Y’0 | ||||||||||||||||
V4L2_PIX_FMT_YUV555 |
‘YUVO’ | Cb2 | Cb1 | Cb0 | Cr4 | Cr3 | Cr2 | Cr1 | Cr0 | a | Y’4 | Y’3 | Y’2 | Y’1 | Y’0 | Cb4 | Cb3 | ||||||||||||||||
V4L2_PIX_FMT_YUV565 |
‘YUVP’ | Cb2 | Cb1 | Cb0 | Cr4 | Cr3 | Cr2 | Cr1 | Cr0 | Y’4 | Y’3 | Y’2 | Y’1 | Y’0 | Cb5 | Cb4 | Cb3 | ||||||||||||||||
V4L2_PIX_FMT_YUV32 |
‘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 |
Note
- 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.