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Fix ConvertToI420 when using YUY2 or UYVY with odd crop_x.

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- swap U and V when crop x is odd
- document YUY2 and UYVY formats
- apply clang-format

Bug: libyuv:902
Change-Id: I045e44c907f4a9eb625d7c024b669bb308055f32
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/3039549
Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>
This commit is contained in:
Frank Barchard 2021-07-19 12:04:32 -07:00 committed by Frank Barchard
parent 0572e0a0b1
commit 639dd4ea76
5 changed files with 147 additions and 133 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 1788
Version: 1789
License: BSD
License File: LICENSE

8
docs/formats.md
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@ -189,7 +189,6 @@ In memory R is the lowest and A is the highest.
Each channel has value ranges from 0 to 65535.
AR64 is similar to ARGB.
# NV12 and NV21
NV12 is a biplanar format with a full sized Y plane followed by a single
@ -200,3 +199,10 @@ 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.
Most NV12 functions allow the destination Y pointer to be NULL.
# YUY2 and UYVY
YUY2 is a packed YUV format with half width, full height.
YUY2 is YUYV in memory
UYVY is UYVY in memory

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_
#define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 1788
#define LIBYUV_VERSION 1789
#endif // INCLUDE_LIBYUV_VERSION_H_

24
source/convert_to_i420.cc
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@ -89,18 +89,26 @@ int ConvertToI420(const uint8_t* sample,
switch (format) {
// Single plane formats
case FOURCC_YUY2:
case FOURCC_YUY2: { // TODO(fbarchard): Find better odd crop fix.
uint8_t* u = (crop_x & 1) ? dst_v : dst_u;
uint8_t* v = (crop_x & 1) ? dst_u : dst_v;
int stride_u = (crop_x & 1) ? dst_stride_v : dst_stride_u;
int stride_v = (crop_x & 1) ? dst_stride_u : dst_stride_v;
src = sample + (aligned_src_width * crop_y + crop_x) * 2;
r = YUY2ToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, dst_u,
dst_stride_u, dst_v, dst_stride_v, crop_width,
inv_crop_height);
r = YUY2ToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, u,
stride_u, v, stride_v, crop_width, inv_crop_height);
break;
case FOURCC_UYVY:
}
case FOURCC_UYVY: {
uint8_t* u = (crop_x & 1) ? dst_v : dst_u;
uint8_t* v = (crop_x & 1) ? dst_u : dst_v;
int stride_u = (crop_x & 1) ? dst_stride_v : dst_stride_u;
int stride_v = (crop_x & 1) ? dst_stride_u : dst_stride_v;
src = sample + (aligned_src_width * crop_y + crop_x) * 2;
r = UYVYToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, dst_u,
dst_stride_u, dst_v, dst_stride_v, crop_width,
inv_crop_height);
r = UYVYToI420(src, aligned_src_width * 2, dst_y, dst_stride_y, u,
stride_u, v, stride_v, crop_width, inv_crop_height);
break;
}
case FOURCC_RGBP:
src = sample + (src_width * crop_y + crop_x) * 2;
r = RGB565ToI420(src, src_width * 2, dst_y, dst_stride_y, dst_u,