162306a36Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ciGuidelines for Video4Linux pixel format 4CCs 462306a36Sopenharmony_ci============================================ 562306a36Sopenharmony_ci 662306a36Sopenharmony_ciGuidelines for Video4Linux 4CC codes defined using v4l2_fourcc() are 762306a36Sopenharmony_cispecified in this document. First of the characters defines the nature of 862306a36Sopenharmony_cithe pixel format, compression and colour space. The interpretation of the 962306a36Sopenharmony_ciother three characters depends on the first one. 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciExisting 4CCs may not obey these guidelines. 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciRaw bayer 1462306a36Sopenharmony_ci--------- 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciThe following first characters are used by raw bayer formats: 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci- B: raw bayer, uncompressed 1962306a36Sopenharmony_ci- b: raw bayer, DPCM compressed 2062306a36Sopenharmony_ci- a: A-law compressed 2162306a36Sopenharmony_ci- u: u-law compressed 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci2nd character: pixel order 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci- B: BGGR 2662306a36Sopenharmony_ci- G: GBRG 2762306a36Sopenharmony_ci- g: GRBG 2862306a36Sopenharmony_ci- R: RGGB 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci3rd character: uncompressed bits-per-pixel 0--9, A-- 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci4th character: compressed bits-per-pixel 0--9, A-- 33