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Create LUT for PrefixEncode.

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This speeds up lossless compression by 5%.
Change-Id: Ifd114b1d9850dc3aac74593809e7d48529d35e3d
This commit is contained in:
Vikas Arora
2013-08-05 10:19:24 -07:00
parent 988b70844e
commit 69257f70df
6 changed files with 191 additions and 80 deletions
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4
src/enc/vp8l.c
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@ -448,12 +448,12 @@ static void StoreImageToBitMask(
int bits, n_bits;
int code, distance;
PrefixEncode(v->len, &code, &n_bits, &bits);
VP8LPrefixEncode(v->len, &code, &n_bits, &bits);
WriteHuffmanCode(bw, codes, 256 + code);
VP8LWriteBits(bw, n_bits, bits);
distance = PixOrCopyDistance(v);
PrefixEncode(distance, &code, &n_bits, &bits);
VP8LPrefixEncode(distance, &code, &n_bits, &bits);
WriteHuffmanCode(bw, codes + 4, code);
VP8LWriteBits(bw, n_bits, bits);
}