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Code Issues Releases Activity

avfilter/vf_fillborders: add another mode

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This commit is contained in:
Paul B Mahol 2021-07-24 20:20:52 +02:00
parent 94c90b3261
commit d5c76450f8
2 changed files with 99 additions and 1 deletions
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3
doc/filters.texi
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@ -12280,6 +12280,9 @@ fill pixels using wrapping
@item fade
fade pixels to constant value
@item margins
fill pixels at top and bottom with weighted averages pixels near borders
@end table
Default is @var{smear}.

97
libavfilter/vf_fillborders.c
View File

@ -32,7 +32,7 @@
enum { Y, U, V, A };
enum { R, G, B };
enum FillMode { FM_SMEAR, FM_MIRROR, FM_FIXED, FM_REFLECT, FM_WRAP, FM_FADE, FM_NB_MODES };
enum FillMode { FM_SMEAR, FM_MIRROR, FM_FIXED, FM_REFLECT, FM_WRAP, FM_FADE, FM_MARGINS, FM_NB_MODES };
typedef struct Borders {
int left, right, top, bottom;
@ -495,6 +495,99 @@ static void fade_borders16(FillBordersContext *s, AVFrame *frame)
}
}
static void margins_borders8(FillBordersContext *s, AVFrame *frame)
{
for (int p = 0; p < s->nb_planes; p++) {
uint8_t *ptr = (uint8_t *)frame->data[p];
const int linesize = frame->linesize[p];
const int left = s->borders[p].left;
const int right = s->borders[p].right;
const int top = s->borders[p].top;
const int bottom = s->borders[p].bottom;
const int width = s->planewidth[p];
const int height = s->planeheight[p];
for (int y = top; y < height - bottom; y++) {
memset(ptr + linesize * y, ptr[linesize * y + left], left);
memset(ptr + linesize * y + width - right, (ptr + linesize * y + width - right)[-1], right);
}
for (int y = top - 1; y >= 0; y--) {
ptr[linesize * y] = ptr[linesize * (y + 1)];
memcpy(ptr + linesize * y + width - 8, ptr + linesize * (y + 1) + width - 8, 8);
for (int x = 1; x < width - 8; x++) {
int prev = ptr[linesize * (y + 1) + x - 1];
int cur = ptr[linesize * (y + 1) + x];
int next = ptr[linesize * (y + 1) + x + 1];
ptr[linesize * y + x] = (3 * prev + 2 * cur + 3 * next + 4) >> 3;
}
}
for (int y = height - bottom; y < height; y++) {
ptr[linesize * y] = ptr[linesize * (y - 1)];
memcpy(ptr + linesize * y + width - 8, ptr + linesize * (y - 1) + width - 8, 8);
for (int x = 1; x < width - 8; x++) {
int prev = ptr[linesize * (y - 1) + x - 1];
int cur = ptr[linesize * (y - 1) + x];
int next = ptr[linesize * (y - 1) + x + 1];
ptr[linesize * y + x] = (3 * prev + 2 * cur + 3 * next + 4) >> 3;
}
}
}
}
static void margins_borders16(FillBordersContext *s, AVFrame *frame)
{
for (int p = 0; p < s->nb_planes; p++) {
uint16_t *ptr = (uint16_t *)frame->data[p];
const int linesize = frame->linesize[p] / 2;
const int left = s->borders[p].left;
const int right = s->borders[p].right;
const int top = s->borders[p].top;
const int bottom = s->borders[p].bottom;
const int width = s->planewidth[p];
const int height = s->planeheight[p];
for (int y = top; y < height - bottom; y++) {
for (int x = 0; x < left; x++)
ptr[linesize * y + x] = ptr[linesize * y + left];
for (int x = 0; x < right; x++)
ptr[linesize * y + width - right + x] = ptr[linesize * y + width - right - 1];
}
for (int y = top - 1; y >= 0; y--) {
ptr[linesize * y] = ptr[linesize * (y + 1)];
memcpy(ptr + linesize * y + width - 8, ptr + linesize * (y + 1) + width - 8, 16);
for (int x = 1; x < width - 8; x++) {
int prev = ptr[linesize * (y + 1) + x - 1];
int cur = ptr[linesize * (y + 1) + x];
int next = ptr[linesize * (y + 1) + x + 1];
ptr[linesize * y + x] = (3 * prev + 2 * cur + 3 * next + 4) >> 3;
}
}
for (int y = height - bottom; y < height; y++) {
ptr[linesize * y] = ptr[linesize * (y - 1)];
memcpy(ptr + linesize * y + width - 8, ptr + linesize * (y - 1) + width - 8, 16);
for (int x = 1; x < width - 8; x++) {
int prev = ptr[linesize * (y - 1) + x - 1];
int cur = ptr[linesize * (y - 1) + x];
int next = ptr[linesize * (y - 1) + x + 1];
ptr[linesize * y + x] = (3 * prev + 2 * cur + 3 * next + 4) >> 3;
}
}
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
FillBordersContext *s = inlink->dst->priv;
@ -554,6 +647,7 @@ static int config_input(AVFilterLink *inlink)
case FM_REFLECT:s->fillborders = s->depth <= 8 ? reflect_borders8: reflect_borders16;break;
case FM_WRAP: s->fillborders = s->depth <= 8 ? wrap_borders8 : wrap_borders16; break;
case FM_FADE: s->fillborders = s->depth <= 8 ? fade_borders8 : fade_borders16; break;
case FM_MARGINS:s->fillborders = s->depth <= 8 ? margins_borders8: margins_borders16;break;
default: av_assert0(0);
}
@ -603,6 +697,7 @@ static const AVOption fillborders_options[] = {
{ "reflect",NULL, 0, AV_OPT_TYPE_CONST, {.i64=FM_REFLECT},0, 0, FLAGS, "mode" },
{ "wrap", NULL, 0, AV_OPT_TYPE_CONST, {.i64=FM_WRAP}, 0, 0, FLAGS, "mode" },
{ "fade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=FM_FADE}, 0, 0, FLAGS, "mode" },
{ "margins",NULL, 0, AV_OPT_TYPE_CONST, {.i64=FM_MARGINS},0, 0, FLAGS, "mode" },
{ "color", "set the color for the fixed/fade mode", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
{ NULL }
};