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move the quantization function to dsp.c

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and add a function pointer for it

Change-Id: Ic7012e35c74a474bf140bb23cdaf9d6950026bc6
This commit is contained in:
Pascal Massimino
2011-03-23 17:33:05 -07:00
parent b2c3575c8f
commit 8b77c63262
3 changed files with 64 additions and 45 deletions
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33
src/enc/dsp.c
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@ -581,6 +581,38 @@ static int Disto16x16(const uint8_t* const a, const uint8_t* const b,
VP8WMetric VP8TDisto4x4 = Disto4x4;
VP8WMetric VP8TDisto16x16 = Disto16x16;
//-----------------------------------------------------------------------------
// Quantization
//
// Simple quantization
static int QuantizeBlock(int16_t in[16], int16_t out[16],
int n, const VP8Matrix* const mtx) {
int last = -1;
for (; n < 16; ++n) {
const int j = VP8Zigzag[n];
const int sign = (in[j] < 0);
int coeff = (sign ? -in[j] : in[j]) + mtx->sharpen_[j];
if (coeff > 2047) coeff = 2047;
if (coeff > mtx->zthresh_[j]) {
const int Q = mtx->q_[j];
const int iQ = mtx->iq_[j];
const int B = mtx->bias_[j];
out[n] = QUANTDIV(coeff, iQ, B);
if (sign) out[n] = -out[n];
in[j] = out[n] * Q;
if (out[n]) last = n;
} else {
out[n] = 0;
in[j] = 0;
}
}
return (last >= 0);
}
// default C implementation
VP8QuantizeBlock VP8EncQuantizeBlock = QuantizeBlock;
//-----------------------------------------------------------------------------
// Block copy
@ -606,7 +638,6 @@ VP8BlockCopy VP8Copy16x16 = Copy16x16;
void VP8EncDspInit() {
InitTables();
// later we'll plug some SSE2 variant here
}
#if defined(__cplusplus) || defined(c_plusplus)