[FFmpeg-cvslog] avfilter: add multiply video filter
Paul B Mahol
git at videolan.org
Thu May 5 20:05:44 EEST 2022
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun May 1 14:59:37 2022 +0200| [767f66ea5d96eedcacbffa6815bd72cdeb36d17a] | committer: Paul B Mahol
avfilter: add multiply video filter
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=767f66ea5d96eedcacbffa6815bd72cdeb36d17a
---
Changelog | 1 +
doc/filters.texi | 23 +++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_multiply.c | 253 ++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 280 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 4d467eb741..9eca714bbd 100644
--- a/Changelog
+++ b/Changelog
@@ -14,6 +14,7 @@ version 5.1:
- colormap video filter
- colorchart video source filter
- blurdetect filter
+- multiply video filter
version 5.0:
diff --git a/doc/filters.texi b/doc/filters.texi
index b21bd198ec..367614d2f8 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -16638,6 +16638,29 @@ with the reference file @file{ref.mpg}.
ffmpeg -i main.mpg -i ref.mpg -lavfi msad -f null -
@end example
+ at section multiply
+Multiply first video stream pixels values with second video stream pixels values.
+
+The filter accepts the following options:
+
+ at table @option
+ at item scale
+Set the scale applied to second video stream. By default is @code{1}.
+Allowed range is from @code{0} to @code{9}.
+
+ at item offset
+Set the offset applied to second video stream. By default is @code{0.5}.
+Allowed range is from @code{-1} to @code{1}.
+
+ at item planes
+Specify planes from input video stream that will be processed.
+By default all planes are processed.
+ at end table
+
+ at subsection Commands
+
+This filter supports same @ref{commands} as options.
+
@section negate
Negate (invert) the input video.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index e06acdf881..41bab96aab 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -366,6 +366,7 @@ OBJS-$(CONFIG_MIX_FILTER) += vf_mix.o framesync.o
OBJS-$(CONFIG_MONOCHROME_FILTER) += vf_monochrome.o
OBJS-$(CONFIG_MORPHO_FILTER) += vf_morpho.o
OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o
+OBJS-$(CONFIG_MULTIPLY_FILTER) += vf_multiply.o
OBJS-$(CONFIG_NEGATE_FILTER) += vf_negate.o
OBJS-$(CONFIG_NLMEANS_FILTER) += vf_nlmeans.o
OBJS-$(CONFIG_NLMEANS_OPENCL_FILTER) += vf_nlmeans_opencl.o opencl.o opencl/nlmeans.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 2ad523fd0f..1946e0a51e 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -350,6 +350,7 @@ extern const AVFilter ff_vf_monochrome;
extern const AVFilter ff_vf_morpho;
extern const AVFilter ff_vf_mpdecimate;
extern const AVFilter ff_vf_msad;
+extern const AVFilter ff_vf_multiply;
extern const AVFilter ff_vf_negate;
extern const AVFilter ff_vf_nlmeans;
extern const AVFilter ff_vf_nlmeans_opencl;
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 8f1b16969a..c7ef9f25d7 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -31,7 +31,7 @@
#include "version_major.h"
-#define LIBAVFILTER_VERSION_MINOR 37
+#define LIBAVFILTER_VERSION_MINOR 38
#define LIBAVFILTER_VERSION_MICRO 100
diff --git a/libavfilter/vf_multiply.c b/libavfilter/vf_multiply.c
new file mode 100644
index 0000000000..979b885eb1
--- /dev/null
+++ b/libavfilter/vf_multiply.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2022 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 MultiplyContext {
+ const AVClass *class;
+
+ float offset;
+ float scale;
+ int planes;
+
+ int linesize[4];
+ int nb_planes;
+
+ FFFrameSync fs;
+} MultiplyContext;
+
+#define OFFSET(x) offsetof(MultiplyContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+typedef struct ThreadData {
+ AVFrame *src, *ref, *dst;
+} ThreadData;
+
+static const AVOption multiply_options[] = {
+ { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0., 9., FLAGS },
+ { "offset", "set offset", OFFSET(offset), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, -1., 1., FLAGS },
+ { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=0xF}, 0., 0xF, FLAGS },
+ { NULL }
+};
+
+static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
+ AV_PIX_FMT_NONE
+};
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MultiplyContext *s = ctx->priv;
+ int 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;
+
+ return 0;
+}
+
+static void multiply(const uint8_t *ssrc, const uint8_t *rref, uint8_t *ddst,
+ float scale, float offset, int w)
+{
+ const float *src = (const float *)ssrc;
+ const float *ref = (const float *)rref;
+ float *dst = (float *)ddst;
+
+ for (int x = 0; x < w; x++) {
+ const float factor = (ref[x] + offset) * scale;
+
+ dst[x] = src[x] * factor;
+ }
+}
+
+static int multiply_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ MultiplyContext *s = ctx->priv;
+ const float offset = s->offset;
+ const float scale = s->scale;
+ 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 = td->src->width;
+ const int h = td->src->height;
+ 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++) {
+ multiply(src, ref, dst, scale, offset, w);
+
+ dst += dst_linesize;
+ src += src_linesize;
+ ref += ref_linesize;
+ }
+ }
+
+ return 0;
+}
+
+static int process_frame(FFFrameSync *fs)
+{
+ AVFilterContext *ctx = fs->parent;
+ MultiplyContext *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;
+
+ ff_filter_execute(ctx, multiply_slice, &td, NULL,
+ FFMIN(outlink->h, 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;
+ MultiplyContext *s = ctx->priv;
+ AVFilterLink *source = ctx->inputs[0];
+ AVFilterLink *ref = ctx->inputs[1];
+ FFFrameSyncIn *in;
+ int ret;
+
+ 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)
+{
+ MultiplyContext *s = ctx->priv;
+ return ff_framesync_activate(&s->fs);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ MultiplyContext *s = ctx->priv;
+
+ ff_framesync_uninit(&s->fs);
+}
+
+static const AVFilterPad multiply_inputs[] = {
+ {
+ .name = "source",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ },
+ {
+ .name = "factor",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+};
+
+static const AVFilterPad multiply_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+};
+
+AVFILTER_DEFINE_CLASS(multiply);
+
+const AVFilter ff_vf_multiply = {
+ .name = "multiply",
+ .description = NULL_IF_CONFIG_SMALL("Multiply first video stream with second video stream."),
+ .priv_class = &multiply_class,
+ .priv_size = sizeof(MultiplyContext),
+ .uninit = uninit,
+ .activate = activate,
+ FILTER_INPUTS(multiply_inputs),
+ FILTER_OUTPUTS(multiply_outputs),
+ FILTER_PIXFMTS_ARRAY(pix_fmts),
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
+ .process_command = ff_filter_process_command,
+};
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