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jxl-frame: Check gabor weights #42

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Jun 8, 2023
Merged

jxl-frame: Check gabor weights #42

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7 changes: 6 additions & 1 deletion crates/jxl-frame/src/filter.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,14 @@ impl<Ctx> Bundle<Ctx> for Gabor {

let mut weights = [[0.0f32; 2]; 3];
for chan_weight in &mut weights {
for weight in chan_weight {
for weight in &mut *chan_weight {
*weight = bitstream.read_f16_as_f32()?;
}
if f32::abs(1.0 + (chan_weight[0] + chan_weight[1]) * 4.0) < f32::EPSILON {
return Err(jxl_bitstream::Error::ValidationFailed(
"Gaborish weights lead to near 0 unnormalized kernel"
).into());
}
}
Ok(Self::Enabled(weights))
}
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