diff options
| author | Frank Barchard <fbarchard@chromium.org> | 2018-01-22 14:33:32 -0800 |
|---|---|---|
| committer | Frank Barchard <fbarchard@chromium.org> | 2018-01-23 01:55:14 +0000 |
| commit | a11ffa1625a120aee27669724b1b849552ae2f1e (patch) | |
| tree | 74b13408a940edea71061427d0080667bf88253c /docs | |
| parent | 8af6ea4100b8027697a7b4c81fb684544727c992 (diff) | |
| download | libyuv-a11ffa1625a120aee27669724b1b849552ae2f1e.tar.gz | |
NV12 format documentation added.
TBR=braveyao@chromium.org
Bug: None
Test: None
Change-Id: I3e5564ee2b92180c8c6c9cbad57f1a303ed7bca8
Reviewed-on: https://chromium-review.googlesource.com/879266
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/formats.md | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/docs/formats.md b/docs/formats.md index 3973e5d5..0130a1ff 100644 --- a/docs/formats.md +++ b/docs/formats.md @@ -139,7 +139,7 @@ There are 2 RGB layouts - RGB24 (aka 24BG) and RAW RGB24 is B,G,R in memory RAW is R,G,B in memory -# AR30 +# AR30 and XR30 AR30 is 2 10 10 10 ARGB stored in little endian order. The 2 bit alpha has 4 values. Here are the comparable 8 bit alpha values. @@ -148,3 +148,14 @@ The 2 bit alpha has 4 values. Here are the comparable 8 bit alpha values. 2 - 66%. 10101010b = 0xaa = 170 3 - 100%. 11111111b = 0xff = 255 The 10 bit RGB values range from 0 to 1023. +XR30 is the same as AR30 but with no alpha channel. + +# NV12 and NV21 + +NV12 is a biplanar format with a full sized Y plane followed by a single +chroma plane with weaved U and V values. +NV21 is the same but with weaved V and U values. +The 12 in NV12 refers to 12 bits per pixel. NV12 has a half width and half +height chroma channel, and therefore is a 420 subsampling. +NV16 is 16 bits per pixel, with half width and full height. aka 422. +NV24 is 24 bits per pixel with full sized chroma channel. aka 444. |