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avfilter/vf_xfade: add circleopen & circleclose transition

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Paul B Mahol 2020-02-04 10:27:57 +01:00
parent fb3855342b
commit efee86fafa
2 changed files with 66 additions and 0 deletions
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2
doc/filters.texi
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@ -19929,6 +19929,8 @@ Set one of available transition effects:
@item smoothright
@item smoothup
@item smoothdown
@item circleopen
@item circleclose
@end table
Default transition effect is fade.

64
libavfilter/vf_xfade.c
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@ -49,6 +49,8 @@ enum XFadeTransitions {
SMOOTHRIGHT,
SMOOTHUP,
SMOOTHDOWN,
CIRCLEOPEN,
CIRCLECLOSE,
NB_TRANSITIONS,
};
@ -150,6 +152,8 @@ static const AVOption xfade_options[] = {
{ "smoothright","smoothright transition", 0, AV_OPT_TYPE_CONST, {.i64=SMOOTHRIGHT},0, 0, FLAGS, "transition" },
{ "smoothup", "smoothup transition", 0, AV_OPT_TYPE_CONST, {.i64=SMOOTHUP}, 0, 0, FLAGS, "transition" },
{ "smoothdown", "smoothdown transition", 0, AV_OPT_TYPE_CONST, {.i64=SMOOTHDOWN}, 0, 0, FLAGS, "transition" },
{ "circleopen", "circleopen transition", 0, AV_OPT_TYPE_CONST, {.i64=CIRCLEOPEN}, 0, 0, FLAGS, "transition" },
{ "circleclose","circleclose transition", 0, AV_OPT_TYPE_CONST, {.i64=CIRCLECLOSE},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 },
@ -796,6 +800,64 @@ static void smoothdown##name##_transition(AVFilterContext *ctx,
SMOOTHDOWN_TRANSITION(8, uint8_t, 1)
SMOOTHDOWN_TRANSITION(16, uint16_t, 2)
#define CIRCLEOPEN_TRANSITION(name, type, div) \
static void circleopen##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 int height = out->height; \
const float z = hypotf(width / 2, height / 2); \
const float p = (progress - 0.5f) * 3.f; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float smooth = hypotf(x - width / 2, y - height / 2) / z + p; \
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]); \
\
dst[x] = mix(xf0[x], xf1[x], smoothstep(0.f, 1.f, smooth)); \
} \
} \
} \
}
CIRCLEOPEN_TRANSITION(8, uint8_t, 1)
CIRCLEOPEN_TRANSITION(16, uint16_t, 2)
#define CIRCLECLOSE_TRANSITION(name, type, div) \
static void circleclose##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 int height = out->height; \
const float z = hypotf(width / 2, height / 2); \
const float p = (1.f - progress - 0.5f) * 3.f; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float smooth = hypotf(x - width / 2, y - height / 2) / z + p; \
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]); \
\
dst[x] = mix(xf1[x], xf0[x], smoothstep(0.f, 1.f, smooth)); \
} \
} \
} \
}
CIRCLECLOSE_TRANSITION(8, uint8_t, 1)
CIRCLECLOSE_TRANSITION(16, uint16_t, 2)
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -906,6 +968,8 @@ static int config_output(AVFilterLink *outlink)
case SMOOTHRIGHT:s->transitionf = s->depth <= 8 ? smoothright8_transition: smoothright16_transition;break;
case SMOOTHUP: s->transitionf = s->depth <= 8 ? smoothup8_transition : smoothup16_transition; break;
case SMOOTHDOWN: s->transitionf = s->depth <= 8 ? smoothdown8_transition : smoothdown16_transition; break;
case CIRCLEOPEN: s->transitionf = s->depth <= 8 ? circleopen8_transition : circleopen16_transition; break;
case CIRCLECLOSE:s->transitionf = s->depth <= 8 ? circleclose8_transition: circleclose16_transition;break;
}
if (s->transition == CUSTOM) {