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unroll the kBands[] indirection to remove a dereference in GetCoeffs()

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speed-up is small but visible.

Change-Id: Icff546adc3276f3c3d46b147c4a735b5eb8ff22e
This commit is contained in:
Pascal Massimino
2014-12-11 08:06:20 +01:00
parent 8ed9c00d5e
commit 1c4e3efea0
3 changed files with 16 additions and 12 deletions
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9
src/dec/tree.c
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@ -494,6 +494,12 @@ static const uint8_t
};
// Paragraph 9.9
static const int kBands[16 + 1] = {
0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7,
0 // extra entry as sentinel
};
void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) {
VP8Proba* const proba = &dec->proba_;
int t, b, c, p;
@ -507,6 +513,9 @@ void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) {
}
}
}
for (b = 0; b < 16 + 1; ++b) {
proba->bands_ptr_[t][b] = &proba->bands_[t][kBands[b]];
}
}
dec->use_skip_proba_ = VP8Get(br);
if (dec->use_skip_proba_) {