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port FindBestFormatInfo

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This commit is contained in:
Henry Schimke
2023-03-31 16:36:15 -05:00
parent 76fb937ca9
commit 612ef458f2
1 changed files with 21 additions and 14 deletions
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35
src/common/cpp_essentials/base_extentions/qr_formatinformation.rs
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@@ -91,27 +91,34 @@ impl FormatInformation {
fi
}
#[inline(always)]
pub fn MirrorBits(bits: u32) -> u32 {
(bits.reverse_bits()) >> 17
}
pub fn FindBestFormatInfo(mask: u32, lookup: [[u32; 2]; 32], bits: &[u32]) -> Self {
todo!()
// FormatInformation fi;
let mut fi = FormatInformation::default();
// // Some QR codes apparently do not apply the XOR mask. Try without and with additional masking.
// for (auto mask : {0, mask})
// for (int bitsIndex = 0; bitsIndex < Size(bits); ++bitsIndex)
// for (const auto& [pattern, index] : lookup) {
// // Find the int in lookup with fewest bits differing
// if (int hammingDist = BitHacks::CountBitsSet((bits[bitsIndex] ^ mask) ^ pattern); hammingDist < fi.hammingDistance) {
// fi.index = index;
// fi.hammingDistance = hammingDist;
// fi.bitsIndex = bitsIndex;
// }
// }
// Some QR codes apparently do not apply the XOR mask. Try without and with additional masking.
for mask in [0, mask] {
// for (auto mask : {0, mask})
for bitsIndex in 0..bits.len() {
// for (int bitsIndex = 0; bitsIndex < Size(bits); ++bitsIndex)
for [pattern, index] in lookup {
// for (const auto& [pattern, index] : lookup) {
// Find the int in lookup with fewest bits differing
let hammingDist = ((bits[bitsIndex] ^ mask) ^ pattern).count_ones();
if hammingDist < fi.hammingDistance {
// if (int hammingDist = BitHacks::CountBitsSet((bits[bitsIndex] ^ mask) ^ pattern); hammingDist < fi.hammingDistance) {
fi.index = index as u8;
fi.hammingDistance = hammingDist;
fi.bitsIndex = bitsIndex as u8;
}
}
}
}
// return fi;
fi
}
// Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits differing means we found a match