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When the input format is YUV, subsample the chroma during RGB to YUV
conversion based on the YUV format parameters. This matches the RGB to
YUV conversion performed to generate the test input frame fed to the
RPF.
A better fix would be to add support for unpacking all RGB and YUV
formats instead of converting the .pnm reference frames.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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gen-image averages consecutive chroma values when subsampling chroma
horizontally. This matches the hardware behaviour, but isn't desired to
produce test input frames in subsampled formats as otherwise the
hardware will average the values a second time in the RPF to interpolate
missing chroma components.
Add a -C argument to disable chroma averaging on output, to be used to
generate test input frames.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Replace the -y argument with a more flexible -i argument that allows
specifying the input format. This is useful to generate reference frames
based on an RGB pipeline input format that uses less than 8 bits per
pixel.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The tool is used to generate test images in a variety of formats from a
PNM input image.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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