"Variance" wasn't exactly the correct word; "cut score" is more
agnostic, which will be useful when changing the algorithm in the next
commit.
---
libavfilter/vf_palettegen.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/libavfilter/vf_palettegen.c b/libavfilter/vf_palettegen.c
index ca1e02444c..7ecb1211ba 100644
--- a/libavfilter/vf_palettegen.c
+++ b/libavfilter/vf_palettegen.c
@@ -42,7 +42,7 @@ struct range_box {
uint32_t color; // average color
int major_axis; // best axis candidate for cutting the box
uint64_t weight; // sum of all the weights of the colors
- int64_t variance; // overall variance of the box (how much the colors
are spread)
+ int64_t cut_score; // how likely the box is to be cut down (higher
implying more likely)
int start; // index in PaletteGenContext->refs
int len; // number of referenced colors
int sorted_by; // whether range of colors is sorted by red (0), green
(1) or blue (2)
@@ -171,25 +171,25 @@ static void compute_box_stats(PaletteGenContext *s,
struct range_box *box)
if (er2[0] >= er2[1] && er2[0] >= er2[2]) box->major_axis = 0;
if (er2[1] >= er2[0] && er2[1] >= er2[2]) box->major_axis = 1; // prefer
green again
- box->variance = er2[0] + er2[1] + er2[2];
+ box->cut_score = er2[0] + er2[1] + er2[2];
}
/**
- * Find the next box to split: pick the one with the highest variance
+ * Find the next box to split: pick the one with the highest cut score
*/
static int get_next_box_id_to_split(PaletteGenContext *s)
{
int box_id, best_box_id = -1;
- int64_t max_variance = -1;
+ int64_t max_score = -1;
if (s->nb_boxes == s->max_colors - s->reserve_transparent)
return -1;
for (box_id = 0; box_id < s->nb_boxes; box_id++) {
struct range_box *box = &s->boxes[box_id];
- if (s->boxes[box_id].len >= 2 && box->variance > max_variance) {
+ if (s->boxes[box_id].len >= 2 && box->cut_score > max_score) {
best_box_id = box_id;
- max_variance = box->variance;
+ max_score = box->cut_score;
}
}
return best_box_id;
--
2.39.0
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