Impact is more negligible than previous commit but still faster (1.02x).
---
libavfilter/vf_paletteuse.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/libavfilter/vf_paletteuse.c b/libavfilter/vf_paletteuse.c
index c32b73ab9a..c2d6333662 100644
--- a/libavfilter/vf_paletteuse.c
+++ b/libavfilter/vf_paletteuse.c
@@ -70,8 +70,7 @@ struct color_node {
int left_id, right_id;
};
-#define NBITS 5
-#define CACHE_SIZE (1<<(3*NBITS))
+#define CACHE_SIZE (1<<15)
struct cached_color {
uint32_t color;
@@ -346,10 +345,7 @@ static av_always_inline int color_get(PaletteUseContext
*s, uint32_t color,
{
int i;
struct color_info clrinfo;
- const uint8_t rhash = (color>>16) & ((1<<NBITS)-1);
- const uint8_t ghash = (color>> 8) & ((1<<NBITS)-1);
- const uint8_t bhash = color & ((1<<NBITS)-1);
- const unsigned hash = rhash<<(NBITS*2) | ghash<<NBITS | bhash;
+ const uint32_t hash = ff_lowbias32(color) & (CACHE_SIZE - 1);
struct cache_node *node = &s->cache[hash];
struct cached_color *e;
--
2.39.0
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