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avfilter/vf_displace: add mirror edge mode 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-09-03 14:15:33 +02:00
parent 06ed3768c8
commit e6e58de03d
2 changed files with 42 additions and 3 deletions
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3
doc/filters.texi
View File

@ -6890,6 +6890,9 @@ Adjacent pixels will spread out to replace missing pixels.
@item wrap
Out of range pixels are wrapped so they point to pixels of other side.
@item mirror
Out of range pixels will be replaced with mirrored pixels.
@end table
Default is @samp{smear}.

42
libavfilter/vf_displace.c
View File

@ -31,6 +31,7 @@ enum EdgeMode {
EDGE_BLANK,
EDGE_SMEAR,
EDGE_WRAP,
EDGE_MIRROR,
EDGE_NB
};
@ -53,9 +54,10 @@ typedef struct DisplaceContext {
static const AVOption displace_options[] = {
{ "edge", "set edge mode", OFFSET(edge), AV_OPT_TYPE_INT, {.i64=EDGE_SMEAR}, 0, EDGE_NB-1, FLAGS, "edge" },
{ "blank", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_BLANK}, 0, 0, FLAGS, "edge" },
{ "smear", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_SMEAR}, 0, 0, FLAGS, "edge" },
{ "wrap" , "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_WRAP}, 0, 0, FLAGS, "edge" },
{ "blank", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_BLANK}, 0, 0, FLAGS, "edge" },
{ "smear", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_SMEAR}, 0, 0, FLAGS, "edge" },
{ "wrap" , "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_WRAP}, 0, 0, FLAGS, "edge" },
{ "mirror" , "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_MIRROR}, 0, 0, FLAGS, "edge" },
{ NULL }
};
@ -130,6 +132,22 @@ static void displace_planar(DisplaceContext *s, const AVFrame *in,
dst[x] = src[Y * slinesize + X];
}
break;
case EDGE_MIRROR:
for (x = 0; x < w; x++) {
int Y = y + ysrc[x] - 128;
int X = x + xsrc[x] - 128;
if (Y < 0)
Y = (-Y) % h;
if (X < 0)
X = (-X) % w;
if (Y >= h)
Y = h - (Y % h) - 1;
if (X >= w)
X = w - (X % w) - 1;
dst[x] = src[Y * slinesize + X];
}
break;
}
ysrc += ylinesize;
@ -196,6 +214,24 @@ static void displace_packed(DisplaceContext *s, const AVFrame *in,
}
}
break;
case EDGE_MIRROR:
for (x = 0; x < w; x++) {
for (c = 0; c < s->nb_components; c++) {
int Y = y + ysrc[x * step + c] - 128;
int X = x + xsrc[x * step + c] - 128;
if (Y < 0)
Y = (-Y) % h;
if (X < 0)
X = (-X) % w;
if (Y >= h)
Y = h - (Y % h) - 1;
if (X >= w)
X = w - (X % w) - 1;
dst[x * step + c] = src[Y * slinesize + X * step + c];
}
}
break;
}
ysrc += ylinesize;