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Document AR30 format

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Bug: libyuv:751
Test: none
Change-Id: If6d5e7b9c5e6e8d2a272e03ce5a1cc199ef364ca
Reviewed-on: https://chromium-review.googlesource.com/779980
Reviewed-by: Weiyong Yao <braveyao@chromium.org>
Reviewed-by: Frank Barchard <fbarchard@google.com>
This commit is contained in:
Frank Barchard 2017-11-20 11:37:36 -08:00
parent 12c904a97c
commit f2978400d5
3 changed files with 13 additions and 2 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv Name: libyuv
URL: http://code.google.com/p/libyuv/ URL: http://code.google.com/p/libyuv/
Version: 1678 Version: 1679
License: BSD License: BSD
License File: LICENSE License File: LICENSE

11
docs/formats.md
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@ -54,6 +54,7 @@ The following is extracted from video_common.h as a complete list of formats sup
FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'), FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'),
FOURCC_BGRA = FOURCC('B', 'G', 'R', 'A'), FOURCC_BGRA = FOURCC('B', 'G', 'R', 'A'),
FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'), FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'),
FOURCC_AR30 = FOURCC('A', 'R', '3', '0'),
FOURCC_24BG = FOURCC('2', '4', 'B', 'G'), FOURCC_24BG = FOURCC('2', '4', 'B', 'G'),
FOURCC_RAW = FOURCC('r', 'a', 'w', ' '), FOURCC_RAW = FOURCC('r', 'a', 'w', ' '),
FOURCC_RGBA = FOURCC('R', 'G', 'B', 'A'), FOURCC_RGBA = FOURCC('R', 'G', 'B', 'A'),
@ -145,3 +146,13 @@ There are 2 RGB layouts - RGB24 (aka 24BG) and RAW
RGB24 is B,G,R in memory RGB24 is B,G,R in memory
RAW is R,G,B in memory RAW is R,G,B in memory
# AR30
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.
0 - 0. 00000000b = 0x00 = 0
1 - 33%. 01010101b = 0x55 = 85
2 - 66%. 10101010b = 0xaa = 170
3 - 100%. 11111111b = 0xff = 255
The 10 bit RGB values range from 0 to 1023.

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_ #ifndef INCLUDE_LIBYUV_VERSION_H_
#define INCLUDE_LIBYUV_VERSION_H_ #define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 1678 #define LIBYUV_VERSION 1679
#endif // INCLUDE_LIBYUV_VERSION_H_ #endif // INCLUDE_LIBYUV_VERSION_H_