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minor optimisation+tuning of vq search

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This commit is contained in:
Jean-Marc Valin 2008-02-12 23:00:18 +11:00
parent 636f5c86ab
commit ac1e03d78e
2 changed files with 21 additions and 5 deletions
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16
libcelt/bands.c
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@ -237,7 +237,8 @@ void quant_bands(const CELTMode *m, float *X, float *P, float *W, struct alloc_d
float norm[B*eBands[m->nbEBands+1]];
int pulses[m->nbEBands];
int offsets[m->nbEBands];
float alpha = .7;
for (i=0;i<m->nbEBands;i++)
offsets[i] = 0;
/* Use a single-bit margin to guard against overrunning (make sure it's enough) */
@ -262,17 +263,20 @@ void quant_bands(const CELTMode *m, float *X, float *P, float *W, struct alloc_d
if (eBands[i] >= m->pitchEnd || q<=0)
{
q -= 1;
alpha = 0;
if (q<0)
intra_fold(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, norm, P+B*eBands[i], B, eBands[i]);
else
intra_prediction(X+B*eBands[i], W+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, norm, P+B*eBands[i], B, eBands[i], enc);
} else {
alpha = .7;
}
if (q > 0)
{
exp_rotation(P+B*eBands[i], B*(eBands[i+1]-eBands[i]), theta, -1, B, 8);
exp_rotation(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), theta, -1, B, 8);
alg_quant(X+B*eBands[i], W+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, P+B*eBands[i], 0.7, enc);
alg_quant(X+B*eBands[i], W+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, P+B*eBands[i], alpha, enc);
exp_rotation(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), theta, 1, B, 8);
}
for (j=B*eBands[i];j<B*eBands[i+1];j++)
@ -294,7 +298,8 @@ void unquant_bands(const CELTMode *m, float *X, float *P, struct alloc_data *all
float norm[B*eBands[m->nbEBands+1]];
int pulses[m->nbEBands];
int offsets[m->nbEBands];
float alpha = .7;
for (i=0;i<m->nbEBands;i++)
offsets[i] = 0;
/* Use a single-bit margin to guard against overrunning (make sure it's enough) */
@ -314,16 +319,19 @@ void unquant_bands(const CELTMode *m, float *X, float *P, struct alloc_data *all
if (eBands[i] >= m->pitchEnd || q<=0)
{
q -= 1;
alpha = 0;
if (q<0)
intra_fold(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, norm, P+B*eBands[i], B, eBands[i]);
else
intra_unquant(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, norm, P+B*eBands[i], B, eBands[i], dec);
} else {
alpha = .7;
}
if (q > 0)
{
exp_rotation(P+B*eBands[i], B*(eBands[i+1]-eBands[i]), theta, -1, B, 8);
alg_unquant(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, P+B*eBands[i], 0.7, dec);
alg_unquant(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), q, P+B*eBands[i], alpha, dec);
exp_rotation(X+B*eBands[i], B*(eBands[i+1]-eBands[i]), theta, 1, B, 8);
}
for (j=B*eBands[i];j<B*eBands[i+1];j++)