[FFmpeg-devel] [PATCH] avfilter: add maskedthreshold filter
Paul B Mahol
onemda at gmail.com
Wed Apr 15 13:41:52 EEST 2020
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 15 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_maskedthreshold.c | 298 +++++++++++++++++++++++++++++++
4 files changed, 315 insertions(+)
create mode 100644 libavfilter/vf_maskedthreshold.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 60c899490a..856d8ae6ac 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -13247,6 +13247,21 @@ copied from first stream.
By default value 0xf, all planes will be processed.
@end table
+ at section maskedthreshold
+Pick pixels comparing absolute difference of two video streams with fixed threshold.
+
+This filter accepts the following options:
+ at table @option
+ at item threshold
+Set threshold used when picking pixels from absolute difference from two input
+video streams.
+
+ at item planes
+Set which planes will be processed as bitmap, unprocessed planes will be
+copied from second stream.
+By default value 0xf, all planes will be processed.
+ at end table
+
@section maskfun
Create mask from input video.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index b54e6cd374..e1205eb063 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -302,6 +302,7 @@ OBJS-$(CONFIG_MASKEDCLAMP_FILTER) += vf_maskedclamp.o framesync.o
OBJS-$(CONFIG_MASKEDMAX_FILTER) += vf_maskedminmax.o framesync.o
OBJS-$(CONFIG_MASKEDMERGE_FILTER) += vf_maskedmerge.o framesync.o
OBJS-$(CONFIG_MASKEDMIN_FILTER) += vf_maskedminmax.o framesync.o
+OBJS-$(CONFIG_MASKEDTHRESHOLD_FILTER) += vf_maskedthreshold.o framesync.o
OBJS-$(CONFIG_MASKFUN_FILTER) += vf_maskfun.o
OBJS-$(CONFIG_MCDEINT_FILTER) += vf_mcdeint.o
OBJS-$(CONFIG_MEDIAN_FILTER) += vf_median.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 5842196118..6354375e91 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -287,6 +287,7 @@ extern AVFilter ff_vf_maskedclamp;
extern AVFilter ff_vf_maskedmax;
extern AVFilter ff_vf_maskedmerge;
extern AVFilter ff_vf_maskedmin;
+extern AVFilter ff_vf_maskedthreshold;
extern AVFilter ff_vf_maskfun;
extern AVFilter ff_vf_mcdeint;
extern AVFilter ff_vf_median;
diff --git a/libavfilter/vf_maskedthreshold.c b/libavfilter/vf_maskedthreshold.c
new file mode 100644
index 0000000000..d925819f6a
--- /dev/null
+++ b/libavfilter/vf_maskedthreshold.c
@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 2020 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/imgutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+#include "framesync.h"
+
+typedef struct MaskedThresholdContext {
+ const AVClass *class;
+
+ int threshold;
+ int planes;
+
+ int linesize[4];
+ int planewidth[4], planeheight[4];
+ int nb_planes;
+ int depth;
+ FFFrameSync fs;
+
+ void (*maskedthreshold)(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w);
+} MaskedThresholdContext;
+
+#define OFFSET(x) offsetof(MaskedThresholdContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+typedef struct ThreadData {
+ AVFrame *src, *ref, *dst;
+} ThreadData;
+
+static const AVOption maskedthreshold_options[] = {
+ { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=1}, 0, UINT16_MAX, FLAGS },
+ { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
+ { NULL }
+};
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
+ AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
+ AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
+ AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+ AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_NONE
+ };
+
+ return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+}
+
+static void threshold8(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w)
+{
+ for (int x = 0; x < w; x++)
+ dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
+}
+
+static void threshold16(const uint8_t *ssrc, const uint8_t *rref, uint8_t *ddst, int threshold, int w)
+{
+ const uint16_t *src = (const uint16_t *)ssrc;
+ const uint16_t *ref = (const uint16_t *)rref;
+ uint16_t *dst = (uint16_t *)ddst;
+
+ for (int x = 0; x < w; x++)
+ dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MaskedThresholdContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int vsub, hsub, ret;
+
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
+ return ret;
+
+ hsub = desc->log2_chroma_w;
+ vsub = desc->log2_chroma_h;
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+
+ if (desc->comp[0].depth == 8)
+ s->maskedthreshold = threshold8;
+ else
+ s->maskedthreshold = threshold16;
+
+ return 0;
+}
+
+static int threshold_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ MaskedThresholdContext *s = ctx->priv;
+ const int threshold = s->threshold;
+ ThreadData *td = arg;
+
+ for (int p = 0; p < s->nb_planes; p++) {
+ const ptrdiff_t src_linesize = td->src->linesize[p];
+ const ptrdiff_t ref_linesize = td->ref->linesize[p];
+ const ptrdiff_t dst_linesize = td->dst->linesize[p];
+ const int w = s->planewidth[p];
+ const int h = s->planeheight[p];
+ const int slice_start = (h * jobnr) / nb_jobs;
+ const int slice_end = (h * (jobnr+1)) / nb_jobs;
+ const uint8_t *src = td->src->data[p] + slice_start * src_linesize;
+ const uint8_t *ref = td->ref->data[p] + slice_start * ref_linesize;
+ uint8_t *dst = td->dst->data[p] + slice_start * dst_linesize;
+
+ if (!((1 << p) & s->planes)) {
+ av_image_copy_plane(dst, dst_linesize, ref, ref_linesize,
+ s->linesize[p], slice_end - slice_start);
+ continue;
+ }
+
+ for (int y = slice_start; y < slice_end; y++) {
+ s->maskedthreshold(src, ref, dst, threshold, w);
+
+ dst += dst_linesize;
+ src += src_linesize;
+ ref += ref_linesize;
+ }
+ }
+
+ return 0;
+}
+
+static int process_frame(FFFrameSync *fs)
+{
+ AVFilterContext *ctx = fs->parent;
+ MaskedThresholdContext *s = fs->opaque;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out, *src, *ref;
+ int ret;
+
+ if ((ret = ff_framesync_get_frame(&s->fs, 0, &src, 0)) < 0 ||
+ (ret = ff_framesync_get_frame(&s->fs, 1, &ref, 0)) < 0)
+ return ret;
+
+ if (ctx->is_disabled) {
+ out = av_frame_clone(src);
+ if (!out)
+ return AVERROR(ENOMEM);
+ } else {
+ ThreadData td;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out)
+ return AVERROR(ENOMEM);
+ av_frame_copy_props(out, src);
+
+ td.src = src;
+ td.ref = ref;
+ td.dst = out;
+
+ ctx->internal->execute(ctx, threshold_slice, &td, NULL, FFMIN(s->planeheight[2],
+ ff_filter_get_nb_threads(ctx)));
+ }
+ out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
+
+ return ff_filter_frame(outlink, out);
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ MaskedThresholdContext *s = ctx->priv;
+ AVFilterLink *source = ctx->inputs[0];
+ AVFilterLink *ref = ctx->inputs[1];
+ FFFrameSyncIn *in;
+ int ret;
+
+ if (source->format != ref->format) {
+ av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
+ return AVERROR(EINVAL);
+ }
+ if (source->w != ref->w || source->h != ref->h) {
+ av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
+ "(size %dx%d) do not match the corresponding "
+ "second input link %s parameters (%dx%d)\n",
+ ctx->input_pads[0].name, source->w, source->h,
+ ctx->input_pads[1].name, ref->w, ref->h);
+ return AVERROR(EINVAL);
+ }
+
+ outlink->w = source->w;
+ outlink->h = source->h;
+ outlink->sample_aspect_ratio = source->sample_aspect_ratio;
+ outlink->frame_rate = source->frame_rate;
+
+ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
+ return ret;
+
+ in = s->fs.in;
+ in[0].time_base = source->time_base;
+ in[1].time_base = ref->time_base;
+ in[0].sync = 1;
+ in[0].before = EXT_STOP;
+ in[0].after = EXT_INFINITY;
+ in[1].sync = 1;
+ in[1].before = EXT_STOP;
+ in[1].after = EXT_INFINITY;
+ s->fs.opaque = s;
+ s->fs.on_event = process_frame;
+
+ ret = ff_framesync_configure(&s->fs);
+ outlink->time_base = s->fs.time_base;
+
+ return ret;
+}
+
+static int activate(AVFilterContext *ctx)
+{
+ MaskedThresholdContext *s = ctx->priv;
+ return ff_framesync_activate(&s->fs);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ MaskedThresholdContext *s = ctx->priv;
+
+ ff_framesync_uninit(&s->fs);
+}
+
+static const AVFilterPad maskedthreshold_inputs[] = {
+ {
+ .name = "source",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ },
+ {
+ .name = "reference",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+static const AVFilterPad maskedthreshold_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(maskedthreshold);
+
+AVFilter ff_vf_maskedthreshold = {
+ .name = "maskedthreshold",
+ .description = NULL_IF_CONFIG_SMALL("Pick pixels comparing absolute difference of two streams with threshold."),
+ .priv_class = &maskedthreshold_class,
+ .priv_size = sizeof(MaskedThresholdContext),
+ .uninit = uninit,
+ .activate = activate,
+ .query_formats = query_formats,
+ .inputs = maskedthreshold_inputs,
+ .outputs = maskedthreshold_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
+};
--
2.17.1
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