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Speed-up: Make sure we only initialize histograms when needed.

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Also, histograms in a HistogramSet can be initialized all
at once.

Change-Id: Ibbfa6034dce58dca8bb9113487e2ae507222ce7d
This commit is contained in:
Vincent Rabaud
2018-10-30 20:33:20 +01:00
parent b6284d8247
commit 6752904b2f
5 changed files with 67 additions and 16 deletions
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7
src/enc/histogram_enc.h
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@ -68,7 +68,9 @@ void VP8LHistogramCreate(VP8LHistogram* const p,
int VP8LGetHistogramSize(int palette_code_bits);
// Set the palette_code_bits and reset the stats.
void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits);
// If init_arrays is true, the arrays are also filled with 0's.
void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits,
int init_arrays);
// Collect all the references into a histogram (without reset)
void VP8LHistogramStoreRefs(const VP8LBackwardRefs* const refs,
@ -84,6 +86,9 @@ void VP8LFreeHistogramSet(VP8LHistogramSet* const histo);
// using 'cache_bits'. Return NULL in case of memory error.
VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits);
// Set the histograms in set to 0.
void VP8LHistogramSetClear(VP8LHistogramSet* const set);
// Allocate and initialize histogram object with specified 'cache_bits'.
// Returns NULL in case of memory error.
// Special case of VP8LAllocateHistogramSet, with size equals 1.