20 lines
895 B
C
20 lines
895 B
C
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#ifndef KMEANS_H
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#define KMEANS_H
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// Spread memory touched by different threads at least 64B apart which I assume is the cache line size. This should avoid memory write contention.
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#define KMEANS_CACHE_LINE_GAP ((64+sizeof(kmeans_state)-1)/sizeof(kmeans_state))
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typedef struct {
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double a, r, g, b, total;
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} kmeans_state;
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typedef void (*kmeans_callback)(hist_item *item, float diff);
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LIQ_PRIVATE void kmeans_init(const colormap *map, const unsigned int max_threads, kmeans_state state[]);
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LIQ_PRIVATE void kmeans_update_color(const f_pixel acolor, const float value, const colormap *map, unsigned int match, const unsigned int thread, kmeans_state average_color[]);
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LIQ_PRIVATE void kmeans_finalize(colormap *map, const unsigned int max_threads, const kmeans_state state[]);
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LIQ_PRIVATE double kmeans_do_iteration(histogram *hist, colormap *const map, kmeans_callback callback);
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#endif
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