mirror of https://github.com/bsnes-emu/bsnes.git
32 lines
639 B
C++
32 lines
639 B
C++
#pragma once
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//move to front
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namespace nall { namespace Decode {
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inline auto MTF(const void* data, uint size) -> vector<uint8_t> {
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auto input = (const uint8_t*)data;
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vector<uint8_t> output;
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output.resize(size);
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uint8_t order[256];
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for(uint n : range(256)) order[n] = n;
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for(uint offset = 0; offset < size; offset++) {
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auto data = input[offset];
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for(uint index = 0; index < 256; index++) {
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uint value = order[data];
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if(value == index) {
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output[offset] = value;
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memory::move(&order[1], &order[0], index);
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order[0] = index;
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break;
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}
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}
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}
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return output;
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}
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}}
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