Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_floodfill.c | 212 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 214 insertions(+)
create mode 100644 libavfilter/vf_floodfill.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index ee16361..5ec0f99 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -186,6 +186,7 @@ OBJS-$(CONFIG_FIELDHINT_FILTER) +=
vf_fieldhint.o
OBJS-$(CONFIG_FIELDMATCH_FILTER) += vf_fieldmatch.o
OBJS-$(CONFIG_FIELDORDER_FILTER) += vf_fieldorder.o
OBJS-$(CONFIG_FIND_RECT_FILTER) += vf_find_rect.o lavfutils.o
+OBJS-$(CONFIG_FLOODFILL_FILTER) += vf_floodfill.o
OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_FPS_FILTER) += vf_fps.o
OBJS-$(CONFIG_FRAMEPACK_FILTER) += vf_framepack.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b1c2d11..635c668 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -198,6 +198,7 @@ static void register_all(void)
REGISTER_FILTER(FIELDMATCH, fieldmatch, vf);
REGISTER_FILTER(FIELDORDER, fieldorder, vf);
REGISTER_FILTER(FIND_RECT, find_rect, vf);
+ REGISTER_FILTER(FLOODFILL, floodfill, vf);
REGISTER_FILTER(FORMAT, format, vf);
REGISTER_FILTER(FPS, fps, vf);
REGISTER_FILTER(FRAMEPACK, framepack, vf);
diff --git a/libavfilter/vf_floodfill.c b/libavfilter/vf_floodfill.c
new file mode 100644
index 0000000..a34766b
--- /dev/null
+++ b/libavfilter/vf_floodfill.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2017 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct Points {
+ uint16_t x, y;
+} Points;
+
+typedef struct FloodfillContext {
+ const AVClass *class;
+
+ int x, y;
+ uint64_t src, dst;
+
+ unsigned s0, s1, s2;
+ unsigned d0, d1, d2;
+
+ int back, front;
+ Points *points;
+} FloodfillContext;
+
+static int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ AVFilterContext *ctx = inlink->dst;
+ FloodfillContext *s = ctx->priv;
+ int depth;
+
+ depth = desc->comp[0].depth;
+ if (depth == 8) {
+ s->s0 = (s->src & 0xFF0000) >> 16;
+ s->s1 = (s->src & 0x00FF00) >> 8;
+ s->s2 = (s->src & 0x0000FF);
+ s->d0 = (s->dst & 0xFF0000) >> 16;
+ s->d1 = (s->dst & 0x00FF00) >> 8;
+ s->d2 = (s->dst & 0x0000FF);
+ } else {
+ }
+
+ s->front = s->back = 0;
+ s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
+ if (!s->points)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+static int is_inside(int x, int y, AVFrame *frame)
+{
+ if (x >= 0 && x < frame->width && y >= 0 && y < frame->height)
+ return 1;
+ return 0;
+}
+
+static int is_same(AVFrame *frame, int x, int y, uint32_t src)
+{
+ unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
+ unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
+ unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
+
+ if (src == (c0 << 16 | c1 << 8 | c2))
+ return 1;
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+ AVFilterContext *ctx = link->dst;
+ FloodfillContext *s = ctx->priv;
+ int ret;
+
+ if (ret = av_frame_make_writable(frame))
+ return ret;
+
+ if (is_inside(s->x, s->y, frame)) {
+ if (is_same(frame, s->x, s->y, s->src)) {
+ s->points[s->front].x = s->x;
+ s->points[s->front].y = s->y;
+ s->front++;
+ }
+
+ while (s->front > s->back) {
+ int x, y;
+
+ s->front--;
+ x = s->points[s->front].x;
+ y = s->points[s->front].y;
+
+ if (is_same(frame, x, y, s->src)) {
+ frame->data[0][y * frame->linesize[0] + x] = s->d0;
+ frame->data[1][y * frame->linesize[1] + x] = s->d1;
+ frame->data[2][y * frame->linesize[2] + x] = s->d2;
+
+ if (is_inside(x + 1, y, frame)) {
+ s->points[s->front] .x = x + 1;
+ s->points[s->front++].y = y;
+ }
+
+ if (is_inside(x - 1, y, frame)) {
+ s->points[s->front] .x = x - 1;
+ s->points[s->front++].y = y;
+ }
+
+ if (is_inside(x, y + 1, frame)) {
+ s->points[s->front] .x = x;
+ s->points[s->front++].y = y + 1;
+ }
+
+ if (is_inside(x, y - 1, frame)) {
+ s->points[s->front] .x = x;
+ s->points[s->front++].y = y - 1;
+ }
+ }
+ }
+ }
+
+ return ff_filter_frame(ctx->outputs[0], frame);
+}
+
+static av_cold int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_GBRP,
+ AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV444P12,
+ AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_NONE
+ };
+ AVFilterFormats *formats;
+
+ formats = ff_make_format_list(pixel_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(ctx, formats);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ FloodfillContext *s = ctx->priv;
+
+ av_freep(&s->points);
+}
+
+static const AVFilterPad floodfill_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad floodfill_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+#define OFFSET(x) offsetof(FloodfillContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption floodfill_options[] = {
+ { "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT,
{.i64=0}, 0, UINT16_MAX, FLAGS },
+ { "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT,
{.i64=0}, 0, UINT16_MAX, FLAGS },
+ { "src", "set source pixel value", OFFSET(src), AV_OPT_TYPE_UINT64,
{.i64=0}, 0, UINT64_MAX, FLAGS },
+ { "dst", "set destination pixel value", OFFSET(dst), AV_OPT_TYPE_UINT64,
{.i64=0}, 0, UINT64_MAX, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(floodfill);
+
+AVFilter ff_vf_floodfill = {
+ .name = "floodfill",
+ .description = NULL_IF_CONFIG_SMALL("Fill area with same color with
another color."),
+ .priv_size = sizeof(FloodfillContext),
+ .priv_class = &floodfill_class,
+ .query_formats = query_formats,
+ .uninit = uninit,
+ .inputs = floodfill_inputs,
+ .outputs = floodfill_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
AVFILTER_FLAG_SLICE_THREADS,
+};
--
2.9.3
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