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avfilter/vf_xfade: add hblur transition

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This commit is contained in:
Paul B Mahol 2020-07-21 23:27:00 +02:00
parent e35a0f8f3f
commit 17f6bd6e58
2 changed files with 48 additions and 0 deletions
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1
doc/filters.texi
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@ -20447,6 +20447,7 @@ Set one of available transition effects:
@item hrslice
@item vuslice
@item vdslice
@item hblur
@end table
Default transition effect is fade.

47
libavfilter/vf_xfade.c
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@ -65,6 +65,7 @@ enum XFadeTransitions {
HRSLICE,
VUSLICE,
VDSLICE,
HBLUR,
NB_TRANSITIONS,
};
@ -182,6 +183,7 @@ static const AVOption xfade_options[] = {
{ "hrslice", "hr slice transition", 0, AV_OPT_TYPE_CONST, {.i64=HRSLICE}, 0, 0, FLAGS, "transition" },
{ "vuslice", "vu slice transition", 0, AV_OPT_TYPE_CONST, {.i64=VUSLICE}, 0, 0, FLAGS, "transition" },
{ "vdslice", "vd slice transition", 0, AV_OPT_TYPE_CONST, {.i64=VDSLICE}, 0, 0, FLAGS, "transition" },
{ "hblur", "hblur transition", 0, AV_OPT_TYPE_CONST, {.i64=HBLUR}, 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 },
@ -1299,6 +1301,50 @@ static void vdslice##name##_transition(AVFilterContext *ctx,
VDSLICE_TRANSITION(8, uint8_t, 1)
VDSLICE_TRANSITION(16, uint16_t, 2)
#define HBLUR_TRANSITION(name, type, div) \
static void hblur##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 int width = out->width; \
const float prog = progress <= 0.5f ? progress * 2.f : (1.f - progress) * 2.f; \
const int size = 1 + (width / 2) * prog; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
type *dst = (type *)(out->data[p] + y * out->linesize[p]); \
float sum0 = 0.f; \
float sum1 = 0.f; \
float cnt = size; \
\
for (int x = 0; x < size; x++) { \
sum0 += xf0[x]; \
sum1 += xf1[x]; \
} \
\
for (int x = 0; x < width; x++) { \
dst[x] = mix(sum0 / cnt, sum1 / cnt, progress); \
\
if (x + size < width) { \
sum0 += xf0[x + size] - xf0[x]; \
sum1 += xf1[x + size] - xf1[x]; \
} else { \
sum0 -= xf0[x]; \
sum1 -= xf1[x]; \
cnt--; \
} \
} \
} \
} \
}
HBLUR_TRANSITION(8, uint8_t, 1)
HBLUR_TRANSITION(16, uint16_t, 2)
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -1425,6 +1471,7 @@ static int config_output(AVFilterLink *outlink)
case HRSLICE: s->transitionf = s->depth <= 8 ? hrslice8_transition : hrslice16_transition; break;
case VUSLICE: s->transitionf = s->depth <= 8 ? vuslice8_transition : vuslice16_transition; break;
case VDSLICE: s->transitionf = s->depth <= 8 ? vdslice8_transition : vdslice16_transition; break;
case HBLUR: s->transitionf = s->depth <= 8 ? hblur8_transition : hblur16_transition; break;
}
if (s->transition == CUSTOM) {