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| author | Frank Barchard <fbarchard@google.com> | 2016-08-23 19:05:25 -0700 |
|---|---|---|
| committer | Frank Barchard <fbarchard@google.com> | 2016-08-23 19:05:25 -0700 |
| commit | 17d31e6a4a3134d6ffbee9c7ed4a30faac7d0b29 (patch) | |
| tree | 886305179a48f38760b1c7a8b7f4acd55c1c1b41 /docs | |
| parent | d58297a2dfb0d97b467d1ad5bcb8b6a13d5f210c (diff) | |
| download | libyuv-17d31e6a4a3134d6ffbee9c7ed4a30faac7d0b29.tar.gz | |
NV12 allow NULL for Y
The conversion from NV12 and other Bi or Tri planar formats, differs only in the UV handling. The helper function supports passing a NULL for the dst_y channel indicating you only want to do the UV conversion.
TBR=harryjin@google.com
TEST=LibYUVConvertTest.NV12ToI420_NullY (601 ms)
BUG=libyuv:626
Review URL: https://codereview.chromium.org/2276703002 .
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/formats.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/formats.md b/docs/formats.md index a7cfed82..f3a35420 100644 --- a/docs/formats.md +++ b/docs/formats.md @@ -102,6 +102,15 @@ The following is extracted from video_common.h as a complete list of formats sup // 1 Auxiliary compressed YUV format set aside for capturer. FOURCC_H264 = FOURCC('H', '2', '6', '4'), +# Planar YUV + The following formats contains a full size Y plane followed by 1 or 2 + planes for UV: I420, I422, I444, I411, I400, NV21, NV12, I400 + The size (subsampling) of the UV varies. + I420, NV12 and NV21 are half width, half height + I422, NV16 and NV61 are half width, full height + I444, NV24 and NV42 are full width, full height + I400 and J400 have no chroma channel. + # The ARGB FOURCC There are 4 ARGB layouts - ARGB, BGRA, ABGR and RGBA. ARGB is most common by far, used for screen formats, and windows webcam drivers. |