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create a separate libwebpdsp under src/dsp

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Gathers all DSP-related function (and SSE2 implementations).
Clean-up some unwanted symbolic dependencies so that webp_encode,
webp_decode and webp_dsp are truly independent libraries.

+ opportunistic clean-up:
  * remove unneeded VP8DspInitTables(), now integrated in VP8DspInit()
  * make consistent use of VP8GetCPUInfo() in the various DspInit() funcs
  * change OUT macro to DST
This commit is contained in:
Pascal Massimino
2011-09-02 21:30:08 +00:00
committed by James Zern
parent ebeb412aa5
commit e06ac0887f
28 changed files with 2217 additions and 500 deletions
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10
src/enc/quant.c
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@ -39,7 +39,7 @@ static inline int clip(int v, int m, int M) {
return v < m ? m : v > M ? M : v;
}
const uint8_t VP8Zigzag[16] = {
static const uint8_t kZigzag[16] = {
0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15
};
@ -143,7 +143,7 @@ static int ExpandMatrix(VP8Matrix* const m, int type) {
m->q_[i] = m->q_[1];
}
for (i = 0; i < 16; ++i) {
const int j = VP8Zigzag[i];
const int j = kZigzag[i];
const int bias = kBiasMatrices[type][j];
m->iq_[j] = (1 << QFIX) / m->q_[j];
m->bias_[j] = BIAS(bias);
@ -440,7 +440,7 @@ static int TrellisQuantizeBlock(const VP8EncIterator* const it,
// compute maximal distortion.
max_error = 0;
for (n = first; n < 16; ++n) {
const int j = VP8Zigzag[n];
const int j = kZigzag[n];
const int err = in[j] * in[j];
max_error += kWeightTrellis[j] * err;
if (err > thresh) last = n;
@ -464,7 +464,7 @@ static int TrellisQuantizeBlock(const VP8EncIterator* const it,
// traverse trellis.
for (n = first; n <= last; ++n) {
const int j = VP8Zigzag[n];
const int j = kZigzag[n];
const int Q = mtx->q_[j];
const int iQ = mtx->iq_[j];
const int B = BIAS(0x00); // neutral bias
@ -560,7 +560,7 @@ static int TrellisQuantizeBlock(const VP8EncIterator* const it,
for (; n >= first; --n) {
const Node* const node = &NODE(n, best_node);
const int j = VP8Zigzag[n];
const int j = kZigzag[n];
out[n] = node->sign ? -node->level : node->level;
nz |= (node->level != 0);
in[j] = out[n] * mtx->q_[j];