diff options
Diffstat (limited to 'media/libwebp/src/dsp/lossless_enc.c')
| -rw-r--r-- | media/libwebp/src/dsp/lossless_enc.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/media/libwebp/src/dsp/lossless_enc.c b/media/libwebp/src/dsp/lossless_enc.c index cde1280617..997d56c2ad 100644 --- a/media/libwebp/src/dsp/lossless_enc.c +++ b/media/libwebp/src/dsp/lossless_enc.c @@ -636,20 +636,25 @@ void VP8LBundleColorMap_C(const uint8_t* const row, int width, int xbits, //------------------------------------------------------------------------------ -static float ExtraCost_C(const uint32_t* population, int length) { +static uint32_t ExtraCost_C(const uint32_t* population, int length) { int i; - float cost = 0.f; - for (i = 2; i < length - 2; ++i) cost += (i >> 1) * population[i + 2]; + uint32_t cost = population[4] + population[5]; + assert(length % 2 == 0); + for (i = 2; i < length / 2 - 1; ++i) { + cost += i * (population[2 * i + 2] + population[2 * i + 3]); + } return cost; } -static float ExtraCostCombined_C(const uint32_t* X, const uint32_t* Y, - int length) { +static uint32_t ExtraCostCombined_C(const uint32_t* X, const uint32_t* Y, + int length) { int i; - float cost = 0.f; - for (i = 2; i < length - 2; ++i) { - const int xy = X[i + 2] + Y[i + 2]; - cost += (i >> 1) * xy; + uint32_t cost = X[4] + Y[4] + X[5] + Y[5]; + assert(length % 2 == 0); + for (i = 2; i < length / 2 - 1; ++i) { + const int xy0 = X[2 * i + 2] + Y[2 * i + 2]; + const int xy1 = X[2 * i + 3] + Y[2 * i + 3]; + cost += i * (xy0 + xy1); } return cost; } |