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Code Issues Releases Activity

avfilter/vf_xfade: add vertopen/close transition

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This commit is contained in:
Paul B Mahol 2020-02-05 16:44:50 +01:00
parent ca9bbfb8e5
commit 10f4441acb
2 changed files with 62 additions and 0 deletions
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2
doc/filters.texi
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@ -19942,6 +19942,8 @@ Set one of available transition effects:
@item smoothdown
@item circleopen
@item circleclose
@item vertopen
@item vertclose
@end table
Default transition effect is fade.

60
libavfilter/vf_xfade.c
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@ -51,6 +51,8 @@ enum XFadeTransitions {
SMOOTHDOWN,
CIRCLEOPEN,
CIRCLECLOSE,
VERTOPEN,
VERTCLOSE,
NB_TRANSITIONS,
};
@ -154,6 +156,8 @@ static const AVOption xfade_options[] = {
{ "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" },
{ "vertopen", "vert open transition", 0, AV_OPT_TYPE_CONST, {.i64=VERTOPEN}, 0, 0, FLAGS, "transition" },
{ "vertclose", "vert close transition", 0, AV_OPT_TYPE_CONST, {.i64=VERTCLOSE}, 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 },
@ -858,6 +862,60 @@ static void circleclose##name##_transition(AVFilterContext *ctx,
CIRCLECLOSE_TRANSITION(8, uint8_t, 1)
CIRCLECLOSE_TRANSITION(16, uint16_t, 2)
#define VERTOPEN_TRANSITION(name, type, div) \
static void vertopen##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 w2 = out->width / 2; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float smooth = 2.f - fabsf((x - w2) / w2) - progress * 2.f; \
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)); \
} \
} \
} \
}
VERTOPEN_TRANSITION(8, uint8_t, 1)
VERTOPEN_TRANSITION(16, uint16_t, 2)
#define VERTCLOSE_TRANSITION(name, type, div) \
static void vertclose##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 w2 = out->width / 2; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float smooth = 1.f + fabsf((x - w2) / w2) - progress * 2.f; \
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)); \
} \
} \
} \
}
VERTCLOSE_TRANSITION(8, uint8_t, 1)
VERTCLOSE_TRANSITION(16, uint16_t, 2)
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -970,6 +1028,8 @@ static int config_output(AVFilterLink *outlink)
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;
case VERTOPEN: s->transitionf = s->depth <= 8 ? vertopen8_transition : vertopen16_transition; break;
case VERTCLOSE: s->transitionf = s->depth <= 8 ? vertclose8_transition : vertclose16_transition; break;
}
if (s->transition == CUSTOM) {