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Code Issues Releases Activity

avfilter/vf_xfade: add cover transitions

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This commit is contained in:
Paul B Mahol 2023-06-17 19:24:09 +02:00
parent 593e8c2c6a
commit 8fe25b1203
2 changed files with 84 additions and 0 deletions
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4
doc/filters.texi
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@ -25259,6 +25259,10 @@ Set one of available transition effects:
@item hrwind
@item vuwind
@item vdwind
@item coverleft
@item coverright
@item coverup
@item coverdown
@end table
Default transition effect is fade.

80
libavfilter/vf_xfade.c
View File

@ -80,6 +80,10 @@ enum XFadeTransitions {
HRWIND,
VUWIND,
VDWIND,
COVERLEFT,
COVERRIGHT,
COVERUP,
COVERDOWN,
NB_TRANSITIONS,
};
@ -214,6 +218,10 @@ static const AVOption xfade_options[] = {
{ "hrwind", "hr wind transition", 0, AV_OPT_TYPE_CONST, {.i64=HRWIND}, 0, 0, FLAGS, "transition" },
{ "vuwind", "vu wind transition", 0, AV_OPT_TYPE_CONST, {.i64=VUWIND}, 0, 0, FLAGS, "transition" },
{ "vdwind", "vd wind transition", 0, AV_OPT_TYPE_CONST, {.i64=VDWIND}, 0, 0, FLAGS, "transition" },
{ "coverleft", "cover left transition", 0, AV_OPT_TYPE_CONST, {.i64=COVERLEFT}, 0, 0, FLAGS, "transition" },
{ "coverright", "cover right transition", 0, AV_OPT_TYPE_CONST, {.i64=COVERRIGHT}, 0, 0, FLAGS, "transition" },
{ "coverup", "cover up transition", 0, AV_OPT_TYPE_CONST, {.i64=COVERUP}, 0, 0, FLAGS, "transition" },
{ "coverdown", "cover down transition", 0, AV_OPT_TYPE_CONST, {.i64=COVERDOWN}, 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 },
@ -1851,6 +1859,74 @@ VWIND_TRANSITION(16, u, uint16_t, 2, 1.f - )
VWIND_TRANSITION(8, d, uint8_t, 1, )
VWIND_TRANSITION(16, d, uint16_t, 2, )
#define COVERH_TRANSITION(dir, name, type, div, expr) \
static void cover##dir##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 height = slice_end - slice_start; \
const int width = out->width; \
const int z = (expr progress) * width; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + slice_start * a->linesize[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 = 0; y < height; y++) { \
for (int x = 0; x < width; x++) { \
const int zx = z + x; \
const int zz = zx % width + width * (zx < 0); \
dst[x] = (zx >= 0) && (zx < width) ? xf1[zz] : xf0[x]; \
} \
\
dst += out->linesize[p] / div; \
xf0 += a->linesize[p] / div; \
xf1 += b->linesize[p] / div; \
} \
} \
}
COVERH_TRANSITION(left, 8, uint8_t, 1, -)
COVERH_TRANSITION(left, 16, uint16_t, 2, -)
COVERH_TRANSITION(right, 8, uint8_t, 1, )
COVERH_TRANSITION(right, 16, uint16_t, 2, )
#define COVERV_TRANSITION(dir, name, type, div, expr) \
static void cover##dir##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 height = out->height; \
const int width = out->width; \
const int z = (expr progress) * height; \
\
for (int p = 0; p < s->nb_planes; p++) { \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
\
for (int y = slice_start; y < slice_end; y++) { \
const int zy = z + y; \
const int zz = zy % height + height * (zy < 0); \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + zz * b->linesize[p]); \
\
for (int x = 0; x < width; x++) \
dst[x] = (zy >= 0) && (zy < height) ? xf1[x] : xf0[x]; \
\
dst += out->linesize[p] / div; \
} \
} \
}
COVERV_TRANSITION(up, 8, uint8_t, 1, -)
COVERV_TRANSITION(up, 16, uint16_t, 2, -)
COVERV_TRANSITION(down, 8, uint8_t, 1, )
COVERV_TRANSITION(down, 16, uint16_t, 2, )
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -2001,6 +2077,10 @@ static int config_output(AVFilterLink *outlink)
case HRWIND: s->transitionf = s->depth <= 8 ? hrwind8_transition : hrwind16_transition; break;
case VUWIND: s->transitionf = s->depth <= 8 ? vuwind8_transition : vuwind16_transition; break;
case VDWIND: s->transitionf = s->depth <= 8 ? vdwind8_transition : vdwind16_transition; break;
case COVERLEFT: s->transitionf = s->depth <= 8 ? coverleft8_transition : coverleft16_transition; break;
case COVERRIGHT: s->transitionf = s->depth <= 8 ? coverright8_transition : coverright16_transition; break;
case COVERUP: s->transitionf = s->depth <= 8 ? coverup8_transition : coverup16_transition; break;
case COVERDOWN: s->transitionf = s->depth <= 8 ? coverdown8_transition : coverdown16_transition; break;
default: return AVERROR_BUG;
}