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This table provides best performance but may only be used reasonably for small bit lengths due to its memory cost. We'll implement a more space-efficient (but not as fast) MultiLookupHuffmanTable in a followup patch.
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I think it LGTM. I'm wondering if you couldn't use an existing implementation on crates.io? Looking at the results https://crates.io/search?q=huffman, they doesn't seem commonly used tho. |
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I've looked at a few crates and they all seemed to use actual trees to represent Huffman codes, which makes them very slow for our use case. |
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Happy to review... could you look at the failing test first? |
Yoric
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I've reworked the |
dominiccooney
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Oct 1, 2019
| /// | ||
| /// If `bit_len` is larger than the number of bits, the prefix is padded with | ||
| /// lower-weight bits into `bit_len` bits. | ||
| pub fn split_bits(&self, bit_len: BitLen) -> (u32, u32) { |
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I'm not sure of the naming of split_bits versus split... Does this need both these APIs? Can the names be made more distinct?
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I renamed it into split_raw_bits, is that better?
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This is a first step towards decompressing Huffman content.