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| author | Paul B Mahol <onemda@gmail.com> | 2022-04-08 10:13:23 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2022-04-08 10:16:59 +0200 |
| commit | 8d6acba59abb218ddacc9122885dd82d35102bfe (patch) | |
| tree | 53983561adbf47ab334ca81cb90e26741ab5e339 | |
| parent | c3f5f1bc56506726dc8324ee370418bd7907c150 (diff) | |
| download | ffmpeg-8d6acba59abb218ddacc9122885dd82d35102bfe.tar.gz | |
avfilter/vf_colorkey: use multiplication instead of division
| -rw-r--r-- | libavfilter/vf_colorkey.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/libavfilter/vf_colorkey.c b/libavfilter/vf_colorkey.c index b4f7c4a7c6..cd4987e26b 100644 --- a/libavfilter/vf_colorkey.c +++ b/libavfilter/vf_colorkey.c @@ -46,7 +46,7 @@ typedef struct ColorkeyContext { } ColorkeyContext; static int do_colorkey_pixel(const uint8_t *colorkey_rgba, int r, int g, int b, - float similarity, float blend, int max, double scale) + float similarity, float iblend, int max, double scale) { double dr, dg, db, diff; @@ -56,8 +56,8 @@ static int do_colorkey_pixel(const uint8_t *colorkey_rgba, int r, int g, int b, diff = sqrt((dr * dr + dg * dg + db * db) / (255.0 * 255.0 * 3.0)); - if (blend > 0.0001) { - return av_clipd((diff - similarity) / blend, 0.0, 1.0) * max; + if (iblend < 10000.0) { + return av_clipd((diff - similarity) * iblend, 0.0, 1.0) * max; } else { return (diff > similarity) ? max : 0; } @@ -73,7 +73,7 @@ static int do_colorkey_slice##name(AVFilterContext *avctx, \ const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; \ ColorkeyContext *ctx = avctx->priv; \ const float similarity = ctx->similarity; \ - const float blend = ctx->blend; \ + const float iblend = 1.f / ctx->blend; \ const uint8_t *colorkey_rgba = ctx->colorkey_rgba; \ const uint8_t *co = ctx->co; \ const double scale = ctx->scale; \ @@ -89,7 +89,7 @@ static int do_colorkey_slice##name(AVFilterContext *avctx, \ dst[o + co[0]], \ dst[o + co[1]], \ dst[o + co[2]], \ - similarity, blend, max, scale); \ + similarity, iblend, max, scale); \ } \ } \ \ @@ -113,7 +113,7 @@ static int do_colorhold_slice##name(AVFilterContext *avctx, void *arg, \ const uint8_t *co = ctx->co; \ const uint8_t *colorkey_rgba = ctx->colorkey_rgba; \ const float similarity = ctx->similarity; \ - const float blend = ctx->blend; \ + const float iblend = 1.f / ctx->blend; \ const double scale = ctx->scale; \ \ for (int y = slice_start; y < slice_end; ++y) { \ @@ -128,7 +128,7 @@ static int do_colorhold_slice##name(AVFilterContext *avctx, void *arg, \ b = dst[o + co[2]]; \ \ t = do_colorkey_pixel(colorkey_rgba, r, g, b, \ - similarity, blend, max, scale); \ + similarity, iblend, max, scale); \ \ if (t > 0) { \ htype a = (r + g + b) / 3; \ |