Allow libyuv to use identity matrix with YUV 4:0:0 #1488
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Allow avifImageYUVToRGB() to convert YUV 4:0:0 with the identity matrix to RGB by using libyuv, similar to the Chromium CL https://chromium-review.googlesource.com/c/chromium/src/+/4727949.
wantehchang
commented
Aug 2, 2023
| // Allow the identity matrix to be used with YUV 4:0:0. Replace the identity matrix with | ||
| // MatrixCoefficients 6 (BT.601). | ||
| const avifBool yuv400WithIdentityMatrix = (image->yuvFormat == AVIF_PIXEL_FORMAT_YUV400) && | ||
| (image->matrixCoefficients == AVIF_MATRIX_COEFFICIENTS_IDENTITY); |
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In the Chromium CL, the condition I used is just image->yuvFormat == AVIF_PIXEL_FORMAT_YUV400. I am planning to change Chromium to match this condition.
vigneshvg
approved these changes
Aug 2, 2023
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Allow avifImageYUVToRGB() to convert YUV 4:0:0 with the identity matrix to RGB by using libyuv, similar to the Chromium CL https://chromium-review.googlesource.com/c/chromium/src/+/4727949.