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Adjusted stereo bit allocation to be higher than mono for the same alloc line

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This commit is contained in:
Jean-Marc Valin 2008-05-30 16:07:06 +10:00
parent 54e860dc04
commit 13294b54c0
1 changed files with 7 additions and 4 deletions
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11
libcelt/modes.c
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@ -208,19 +208,22 @@ static void compute_allocation_table(CELTMode *mode, int res)
eband = 0; eband = 0;
for (j=0;j<BARK_BANDS;j++) for (j=0;j<BARK_BANDS;j++)
{ {
int edge, low; int edge, low, alloc;
edge = mode->eBands[eband+1]*res; edge = mode->eBands[eband+1]*res;
alloc = band_allocation[i*BARK_BANDS+j];
if (mode->nbChannels == 2)
alloc += alloc/2;
if (edge < bark_freq[j+1]) if (edge < bark_freq[j+1])
{ {
int num, den; int num, den;
num = band_allocation[i*BARK_BANDS+j] * (edge-bark_freq[j]); num = alloc * (edge-bark_freq[j]);
den = bark_freq[j+1]-bark_freq[j]; den = bark_freq[j+1]-bark_freq[j];
low = (num+den/2)/den; low = (num+den/2)/den;
allocVectors[i*mode->nbEBands+eband] += low; allocVectors[i*mode->nbEBands+eband] += low;
eband++; eband++;
allocVectors[i*mode->nbEBands+eband] += band_allocation[i*BARK_BANDS+j]-low; allocVectors[i*mode->nbEBands+eband] += alloc-low;
} else { } else {
allocVectors[i*mode->nbEBands+eband] += band_allocation[i*BARK_BANDS+j]; allocVectors[i*mode->nbEBands+eband] += alloc;
} }
} }
} }