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Merge "add comment about the kLevelsFromDelta[][] LUT generation"

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James Zern 2013-10-31 21:37:55 -07:00 committed by Gerrit Code Review
commit 06b1503eff
1 changed files with 4 additions and 1 deletions
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src/enc/filter.c
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@ -18,8 +18,11 @@
extern "C" { extern "C" {
#endif #endif
// this table gives, for a given sharpness, the filtering strength to be // This table gives, for a given sharpness, the filtering strength to be
// used (at least) in order to filter a given edge step delta. // used (at least) in order to filter a given edge step delta.
// This is constructed by brute force inspection: for all delta, we iterate
// over all possible filtering strength / thresh until needs_filter() returns
// true.
#define MAX_DELTA_SIZE 64 #define MAX_DELTA_SIZE 64
static const uint8_t kLevelsFromDelta[8][MAX_DELTA_SIZE] = { static const uint8_t kLevelsFromDelta[8][MAX_DELTA_SIZE] = {
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,