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dsp: WebPExtractGreen function for alpha decompression

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+ NEON implementation

Change-Id: I67204f99d6e4c5974718bdf21dad30381978f72c
This commit is contained in:
Pascal Massimino
2017-01-17 00:01:35 -08:00
parent db013a8d5c
commit 1c07a3c639
4 changed files with 39 additions and 14 deletions
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5
src/dec/vp8l.c
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@ -1492,9 +1492,8 @@ static void ExtractAlphaRows(VP8LDecoder* const dec, int last_row) {
const int cache_pixs = width * num_rows_to_process;
uint8_t* const dst = output + width * cur_row;
const uint32_t* const src = dec->argb_cache_;
int i;
ApplyInverseTransforms(dec, num_rows_to_process, in);
for (i = 0; i < cache_pixs; ++i) dst[i] = (src[i] >> 8) & 0xff;
WebPExtractGreen(src, dst, cache_pixs);
AlphaApplyFilter(alph_dec,
cur_row, cur_row + num_rows_to_process, dst, width);
num_rows -= num_rows_to_process;
@ -1562,6 +1561,8 @@ int VP8LDecodeAlphaImageStream(ALPHDecoder* const alph_dec, int last_row) {
return 1; // done
}
if (!alph_dec->use_8b_decode_) WebPInitAlphaProcessing();
// Decode (with special row processing).
return alph_dec->use_8b_decode_ ?
DecodeAlphaData(dec, (uint8_t*)dec->pixels_, dec->width_, dec->height_,