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Code Issues Releases Activity

avfilter/vf_xfade: add slice transitions

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This commit is contained in:
Paul B Mahol 2020-04-07 13:48:38 +02:00
parent 31c4fe177d
commit 3f9fd9dcfd
2 changed files with 139 additions and 0 deletions
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4
doc/filters.texi
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@ -20119,6 +20119,10 @@ Set one of available transition effects:
@item diagtr
@item diagbl
@item diagbr
@item hlslice
@item hrslice
@item vuslice
@item vdslice
@end table
Default transition effect is fade.

135
libavfilter/vf_xfade.c
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@ -61,6 +61,10 @@ enum XFadeTransitions {
DIAGTR,
DIAGBL,
DIAGBR,
HLSLICE,
HRSLICE,
VUSLICE,
VDSLICE,
NB_TRANSITIONS,
};
@ -174,6 +178,10 @@ static const AVOption xfade_options[] = {
{ "diagtr", "diag tr transition", 0, AV_OPT_TYPE_CONST, {.i64=DIAGTR}, 0, 0, FLAGS, "transition" },
{ "diagbl", "diag bl transition", 0, AV_OPT_TYPE_CONST, {.i64=DIAGBL}, 0, 0, FLAGS, "transition" },
{ "diagbr", "diag br transition", 0, AV_OPT_TYPE_CONST, {.i64=DIAGBR}, 0, 0, FLAGS, "transition" },
{ "hlslice", "hl slice transition", 0, AV_OPT_TYPE_CONST, {.i64=HLSLICE}, 0, 0, FLAGS, "transition" },
{ "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" },
{ "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 },
@ -227,6 +235,11 @@ static inline float mix(float a, float b, float mix)
return a * mix + b * (1.f - mix);
}
static inline float fract(float a)
{
return a - floorf(a);
}
static inline float smoothstep(float edge0, float edge1, float x)
{
float t;
@ -1168,6 +1181,124 @@ static void diagbr##name##_transition(AVFilterContext *ctx,
DIAGBR_TRANSITION(8, uint8_t, 1)
DIAGBR_TRANSITION(16, uint16_t, 2)
#define HLSLICE_TRANSITION(name, type, div) \
static void hlslice##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 w = width; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float smooth = smoothstep(-0.5f, 0.f, x / w - progress * 1.5f); \
const float ss = smooth <= fract(10.f * x / w) ? 0.f : 1.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], ss); \
} \
} \
} \
}
HLSLICE_TRANSITION(8, uint8_t, 1)
HLSLICE_TRANSITION(16, uint16_t, 2)
#define HRSLICE_TRANSITION(name, type, div) \
static void hrslice##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 w = width; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float xx = (w - 1 - x) / w; \
const float smooth = smoothstep(-0.5f, 0.f, xx - progress * 1.5f); \
const float ss = smooth <= fract(10.f * xx) ? 0.f : 1.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], ss); \
} \
} \
} \
}
HRSLICE_TRANSITION(8, uint8_t, 1)
HRSLICE_TRANSITION(16, uint16_t, 2)
#define VUSLICE_TRANSITION(name, type, div) \
static void vuslice##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 h = out->height; \
\
for (int y = slice_start; y < slice_end; y++) { \
const float smooth = smoothstep(-0.5f, 0.f, y / h - progress * 1.5f); \
const float ss = smooth <= fract(10.f * y / h) ? 0.f : 1.f; \
\
for (int x = 0; x < width; x++) { \
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], ss); \
} \
} \
} \
}
VUSLICE_TRANSITION(8, uint8_t, 1)
VUSLICE_TRANSITION(16, uint16_t, 2)
#define VDSLICE_TRANSITION(name, type, div) \
static void vdslice##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 h = out->height; \
\
for (int y = slice_start; y < slice_end; y++) { \
const float yy = (h - 1 - y) / h; \
const float smooth = smoothstep(-0.5f, 0.f, yy - progress * 1.5f); \
const float ss = smooth <= fract(10.f * yy) ? 0.f : 1.f; \
\
for (int x = 0; x < width; x++) { \
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], ss); \
} \
} \
} \
}
VDSLICE_TRANSITION(8, uint8_t, 1)
VDSLICE_TRANSITION(16, uint16_t, 2)
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -1290,6 +1421,10 @@ static int config_output(AVFilterLink *outlink)
case DIAGTR: s->transitionf = s->depth <= 8 ? diagtr8_transition : diagtr16_transition; break;
case DIAGBL: s->transitionf = s->depth <= 8 ? diagbl8_transition : diagbl16_transition; break;
case DIAGBR: s->transitionf = s->depth <= 8 ? diagbr8_transition : diagbr16_transition; break;
case HLSLICE: s->transitionf = s->depth <= 8 ? hlslice8_transition : hlslice16_transition; break;
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;
}
if (s->transition == CUSTOM) {