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Reduced memory usage

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This commit is contained in:
Andrew Murray 2021-04-02 20:48:06 +11:00
parent 6541bd7cb5
commit 6764650e2a
1 changed files with 17 additions and 19 deletions
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36
src/libImaging/Quant.c
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@ -803,37 +803,35 @@ build_distance_tables(
uint32_t i, j; uint32_t i, j;
DistanceWithIndex *dwi; DistanceWithIndex *dwi;
dwi = calloc(nEntries * nEntries, sizeof(DistanceWithIndex)); for (i = 0; i < nEntries; i++) {
avgDist[i * nEntries + i] = 0;
avgDistSortKey[i * nEntries + i] = &(avgDist[i * nEntries + i]);
for (j = 0; j < i; j++) {
avgDist[j * nEntries + i] = avgDist[i * nEntries + j] =
_DISTSQR(p + i, p + j);
avgDistSortKey[j * nEntries + i] = &(avgDist[j * nEntries + i]);
avgDistSortKey[i * nEntries + j] = &(avgDist[i * nEntries + j]);
}
}
dwi = calloc(nEntries, sizeof(DistanceWithIndex));
if (!dwi) { if (!dwi) {
return 0; return 0;
} }
for (i = 0; i < nEntries; i++) { for (i = 0; i < nEntries; i++) {
avgDist[i * nEntries + i] = 0; for (j = 0; j < nEntries; j++) {
dwi[i * nEntries + i] = (DistanceWithIndex){ dwi[j] = (DistanceWithIndex){
&(avgDist[i * nEntries + i]),
i * nEntries + i
};
for (j = 0; j < i; j++) {
avgDist[j * nEntries + i] = avgDist[i * nEntries + j] =
_DISTSQR(p + i, p + j);
dwi[j * nEntries + i] = (DistanceWithIndex){
&(avgDist[j * nEntries + i]),
j * nEntries + i
};
dwi[i * nEntries + j] = (DistanceWithIndex){
&(avgDist[i * nEntries + j]), &(avgDist[i * nEntries + j]),
i * nEntries + j j
}; };
} }
}
for (i = 0; i < nEntries; i++) {
qsort( qsort(
dwi + i * nEntries, dwi,
nEntries, nEntries,
sizeof(DistanceWithIndex), sizeof(DistanceWithIndex),
_sort_ulong_ptr_keys); _sort_ulong_ptr_keys);
for (j = 0; j < nEntries; j++) { for (j = 0; j < nEntries; j++) {
avgDistSortKey[i * nEntries + j] = dwi[i * nEntries + j].distance; avgDistSortKey[i * nEntries + j] = dwi[j].distance;
} }
} }
free(dwi); free(dwi);