| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | Guidelines for Video4Linux pixel format 4CCs |
| 2 | ============================================ |
| 3 | |
| 4 | Guidelines for Video4Linux 4CC codes defined using v4l2_fourcc() are |
| 5 | specified in this document. First of the characters defines the nature of |
| 6 | the pixel format, compression and colour space. The interpretation of the |
| 7 | other three characters depends on the first one. |
| 8 | |
| 9 | Existing 4CCs may not obey these guidelines. |
| 10 | |
| 11 | Raw bayer |
| 12 | --------- |
| 13 | |
| 14 | The following first characters are used by raw bayer formats: |
| 15 | |
| 16 | - B: raw bayer, uncompressed |
| 17 | - b: raw bayer, DPCM compressed |
| 18 | - a: A-law compressed |
| 19 | - u: u-law compressed |
| 20 | |
| 21 | 2nd character: pixel order |
| 22 | |
| 23 | - B: BGGR |
| 24 | - G: GBRG |
| 25 | - g: GRBG |
| 26 | - R: RGGB |
| 27 | |
| 28 | 3rd character: uncompressed bits-per-pixel 0--9, A-- |
| 29 | |
| 30 | 4th character: compressed bits-per-pixel 0--9, A-- |