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Add MSA optimized CollectHistogram function

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We add the following MSA optimized encoder Histogram function:
- CollectHistogram

Change-Id: I28415704ec62c3ad375de06eeef468d9f514bb2d
This commit is contained in:
Parag Salasakar 2016-07-15 22:51:33 +05:30
parent c54ab8dd1a
commit 567e697776
1 changed files with 32 additions and 0 deletions
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32
src/dsp/enc_msa.c
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@ -218,6 +218,37 @@ static int Disto16x16(const uint8_t* const a, const uint8_t* const b,
return D;
}
//------------------------------------------------------------------------------
// Histogram
static void CollectHistogram(const uint8_t* ref, const uint8_t* pred,
int start_block, int end_block,
VP8Histogram* const histo) {
int j;
int distribution[MAX_COEFF_THRESH + 1] = { 0 };
for (j = start_block; j < end_block; ++j) {
int16_t out[16];
VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out);
{
int k;
v8i16 coeff0, coeff1;
const v8i16 zero = { 0 };
const v8i16 max_coeff_thr = __msa_ldi_h(MAX_COEFF_THRESH);
LD_SH2(&out[0], 8, coeff0, coeff1);
coeff0 = __msa_add_a_h(coeff0, zero);
coeff1 = __msa_add_a_h(coeff1, zero);
SRAI_H2_SH(coeff0, coeff1, 3);
coeff0 = __msa_min_s_h(coeff0, max_coeff_thr);
coeff1 = __msa_min_s_h(coeff1, max_coeff_thr);
ST_SH2(coeff0, coeff1, &out[0], 8);
for (k = 0; k < 16; ++k) {
++distribution[out[k]];
}
}
}
VP8SetHistogramData(distribution, histo);
}
//------------------------------------------------------------------------------
// Intra predictions
@ -838,6 +869,7 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitMSA(void) {
VP8TDisto4x4 = Disto4x4;
VP8TDisto16x16 = Disto16x16;
VP8CollectHistogram = CollectHistogram;
VP8EncPredLuma4 = Intra4Preds;
VP8EncPredLuma16 = Intra16Preds;