diff options
| author | Paul B Mahol <onemda@gmail.com> | 2021-09-12 14:56:56 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2021-09-12 15:01:48 +0200 |
| commit | 1db828db8b35c4bf11ec84a0669a43df222b7412 (patch) | |
| tree | ba51ee247c9af85451a1c9e3d4fd0a9e45caf310 /libavfilter | |
| parent | b35653d4c43133295cf856bee628bbad119191db (diff) | |
avfilter/vf_xfade: add zoomin transition
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/vf_xfade.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libavfilter/vf_xfade.c b/libavfilter/vf_xfade.c index 6183cde24c..4d431b0754 100644 --- a/libavfilter/vf_xfade.c +++ b/libavfilter/vf_xfade.c @@ -73,6 +73,7 @@ enum XFadeTransitions { WIPEBR, SQUEEZEH, SQUEEZEV, + ZOOMIN, NB_TRANSITIONS, }; @@ -196,6 +197,7 @@ static const AVOption xfade_options[] = { { "wipebr", "wipe br transition", 0, AV_OPT_TYPE_CONST, {.i64=WIPEBR}, 0, 0, FLAGS, "transition" }, { "squeezeh", "squeeze h transition", 0, AV_OPT_TYPE_CONST, {.i64=SQUEEZEH}, 0, 0, FLAGS, "transition" }, { "squeezev", "squeeze v transition", 0, AV_OPT_TYPE_CONST, {.i64=SQUEEZEV}, 0, 0, FLAGS, "transition" }, + { "zoomin", "zoom in transition", 0, AV_OPT_TYPE_CONST, {.i64=ZOOMIN}, 0, 0, FLAGS, "transition" }, { "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=1000000}, 0, 60000000, FLAGS }, { "offset", "set cross fade start relative to first input stream", OFFSET(offset), AV_OPT_TYPE_DURATION, {.i64=0}, INT64_MIN, INT64_MAX, FLAGS }, { "expr", "set expression for custom transition", OFFSET(custom_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS }, @@ -1629,6 +1631,50 @@ static void squeezev##name##_transition(AVFilterContext *ctx, SQUEEZEV_TRANSITION(8, uint8_t, 1) SQUEEZEV_TRANSITION(16, uint16_t, 2) +static void zoom(float *u, float *v, float amount) +{ + *u = 0.5f + ((*u - 0.5f) * amount); + *v = 0.5f + ((*v - 0.5f) * amount); +} + +#define ZOOMIN_TRANSITION(name, type, div) \ +static void zoomin##name##_transition(AVFilterContext *ctx, \ + const AVFrame *a, const AVFrame *b, AVFrame *out, \ + float progress, \ + int slice_start, int slice_end, int jobnr) \ +{ \ + XFadeContext *s = ctx->priv; \ + const float w = out->width; \ + const float h = out->height; \ + const float zf = smoothstep(0.5f, 1.f, progress); \ + \ + for (int p = 0; p < s->nb_planes; p++) { \ + const type *xf0 = (const type *)(a->data[p]); \ + const type *xf1 = (const type *)(b->data[p] + slice_start * b->linesize[p]); \ + type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \ + \ + for (int y = slice_start; y < slice_end; y++) { \ + for (int x = 0; x < w; x++) { \ + float zv, u, v; \ + int iu, iv; \ + \ + u = x / w; \ + v = y / h; \ + zoom(&u, &v, zf); \ + iu = ceilf(u * (w - 1)); \ + iv = ceilf(v * (h - 1)); \ + zv = xf0[iu + iv * a->linesize[p] / div]; \ + dst[x] = mix(zv, xf1[x], smoothstep(0.f, 0.5f, progress)); \ + } \ + dst += out->linesize[p] / div; \ + xf1 += b->linesize[p] / div; \ + } \ + } \ +} + +ZOOMIN_TRANSITION(8, uint8_t, 1) +ZOOMIN_TRANSITION(16, uint16_t, 2) + static inline double getpix(void *priv, double x, double y, int plane, int nb) { XFadeContext *s = priv; @@ -1778,6 +1824,7 @@ static int config_output(AVFilterLink *outlink) case WIPEBR: s->transitionf = s->depth <= 8 ? wipebr8_transition : wipebr16_transition; break; case SQUEEZEH: s->transitionf = s->depth <= 8 ? squeezeh8_transition : squeezeh16_transition; break; case SQUEEZEV: s->transitionf = s->depth <= 8 ? squeezev8_transition : squeezev16_transition; break; + case ZOOMIN: s->transitionf = s->depth <= 8 ? zoomin8_transition : zoomin16_transition; break; } if (s->transition == CUSTOM) { |