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SSE2: speed-up some lossless-encoding functions

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optimized: CollectColorRedTransforms, CollectColorBlueTransforms, SubtractGreenFromBlueAndRed

overall effect is sub-1% speed-up, though.

Change-Id: I9cb49af5c56e4c03db417929b0a2cf575d60a5c6
This commit is contained in:
Pascal Massimino
2015-06-24 21:46:40 +00:00
committed by James Zern
parent abcb012841
commit 7017001462
3 changed files with 128 additions and 25 deletions
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18
src/dsp/lossless_enc.c
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@ -817,9 +817,9 @@ static float PredictionCostCrossColor(const int accumulated[256],
PredictionCostSpatial(counts, 3, kExpValue);
}
static void CollectColorRedTransforms(const uint32_t* argb, int stride,
int tile_width, int tile_height,
int green_to_red, int histo[]) {
void VP8LCollectColorRedTransforms_C(const uint32_t* argb, int stride,
int tile_width, int tile_height,
int green_to_red, int histo[]) {
while (tile_height-- > 0) {
int x;
for (x = 0; x < tile_width; ++x) {
@ -882,10 +882,10 @@ static void GetBestGreenToRed(
best_tx->green_to_red_ = green_to_red_best;
}
static void CollectColorBlueTransforms(const uint32_t* argb, int stride,
int tile_width, int tile_height,
int green_to_blue, int red_to_blue,
int histo[]) {
void VP8LCollectColorBlueTransforms_C(const uint32_t* argb, int stride,
int tile_width, int tile_height,
int green_to_blue, int red_to_blue,
int histo[]) {
while (tile_height-- > 0) {
int x;
for (x = 0; x < tile_width; ++x) {
@ -1232,8 +1232,8 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInit(void) {
VP8LTransformColor = VP8LTransformColor_C;
VP8LCollectColorBlueTransforms = CollectColorBlueTransforms;
VP8LCollectColorRedTransforms = CollectColorRedTransforms;
VP8LCollectColorBlueTransforms = VP8LCollectColorBlueTransforms_C;
VP8LCollectColorRedTransforms = VP8LCollectColorRedTransforms_C;
VP8LFastLog2Slow = FastLog2Slow;
VP8LFastSLog2Slow = FastSLog2Slow;