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| author | Yuan Tong <tongyuan200097@gmail.com> | 2021-02-12 10:49:25 +0800 |
|---|---|---|
| committer | Frank Barchard <fbarchard@chromium.org> | 2021-02-12 14:55:24 +0000 |
| commit | d4ecb70610325fdaaeec6af074d6e3ceab9866d1 (patch) | |
| tree | f466a880366648830b72984e92637f0616fd9eb2 /source/scale_common.cc | |
| parent | 12a4a2372cf8530de0bb1e8f00c176d31d7da0b6 (diff) | |
| download | libyuv-d4ecb70610325fdaaeec6af074d6e3ceab9866d1.tar.gz | |
Add P010ToP410 and P210ToP410
These are 16 bit bi-planar convert functions to scale UV plane to
Y plane's size using (bi)linear filter.
libyuv_unittest --gtest_filter=*ToP41*
R=fbarchard@chromium.org
Bug: libyuv:872
Change-Id: I3cb4fafe2b2c9eedd0d91cf4c619abb9ee107bc1
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/2690102
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Diffstat (limited to 'source/scale_common.cc')
| -rw-r--r-- | source/scale_common.cc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/source/scale_common.cc b/source/scale_common.cc index f4f23397..da96d428 100644 --- a/source/scale_common.cc +++ b/source/scale_common.cc @@ -1258,6 +1258,64 @@ void ScaleUVRowUp2_Bilinear_C(const uint8_t* src_ptr, } } +void ScaleUVRowUp2_Linear_16_C(const uint16_t* src_ptr, + uint16_t* dst_ptr, + int dst_width) { + int src_width = dst_width >> 1; + int x; + assert((dst_width % 2 == 0) && (dst_width >= 0)); + for (x = 0; x < src_width; ++x) { + dst_ptr[4 * x + 0] = + (src_ptr[2 * x + 0] * 3 + src_ptr[2 * x + 2] * 1 + 2) >> 2; + dst_ptr[4 * x + 1] = + (src_ptr[2 * x + 1] * 3 + src_ptr[2 * x + 3] * 1 + 2) >> 2; + dst_ptr[4 * x + 2] = + (src_ptr[2 * x + 0] * 1 + src_ptr[2 * x + 2] * 3 + 2) >> 2; + dst_ptr[4 * x + 3] = + (src_ptr[2 * x + 1] * 1 + src_ptr[2 * x + 3] * 3 + 2) >> 2; + } +} + +void ScaleUVRowUp2_Bilinear_16_C(const uint16_t* src_ptr, + ptrdiff_t src_stride, + uint16_t* dst_ptr, + ptrdiff_t dst_stride, + int dst_width) { + const uint16_t* s = src_ptr; + const uint16_t* t = src_ptr + src_stride; + uint16_t* d = dst_ptr; + uint16_t* e = dst_ptr + dst_stride; + int src_width = dst_width >> 1; + int x; + assert((dst_width % 2 == 0) && (dst_width >= 0)); + for (x = 0; x < src_width; ++x) { + d[4 * x + 0] = (s[2 * x + 0] * 9 + s[2 * x + 2] * 3 + t[2 * x + 0] * 3 + + t[2 * x + 2] * 1 + 8) >> + 4; + d[4 * x + 1] = (s[2 * x + 1] * 9 + s[2 * x + 3] * 3 + t[2 * x + 1] * 3 + + t[2 * x + 3] * 1 + 8) >> + 4; + d[4 * x + 2] = (s[2 * x + 0] * 3 + s[2 * x + 2] * 9 + t[2 * x + 0] * 1 + + t[2 * x + 2] * 3 + 8) >> + 4; + d[4 * x + 3] = (s[2 * x + 1] * 3 + s[2 * x + 3] * 9 + t[2 * x + 1] * 1 + + t[2 * x + 3] * 3 + 8) >> + 4; + e[4 * x + 0] = (s[2 * x + 0] * 3 + s[2 * x + 2] * 1 + t[2 * x + 0] * 9 + + t[2 * x + 2] * 3 + 8) >> + 4; + e[4 * x + 1] = (s[2 * x + 1] * 3 + s[2 * x + 3] * 1 + t[2 * x + 1] * 9 + + t[2 * x + 3] * 3 + 8) >> + 4; + e[4 * x + 2] = (s[2 * x + 0] * 1 + s[2 * x + 2] * 3 + t[2 * x + 0] * 3 + + t[2 * x + 2] * 9 + 8) >> + 4; + e[4 * x + 3] = (s[2 * x + 1] * 1 + s[2 * x + 3] * 3 + t[2 * x + 1] * 3 + + t[2 * x + 3] * 9 + 8) >> + 4; + } +} + // Scales a single row of pixels using point sampling. void ScaleUVCols_C(uint8_t* dst_uv, const uint8_t* src_uv, |