From 767f66ea5d96eedcacbffa6815bd72cdeb36d17a Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 1 May 2022 14:59:37 +0200 Subject: [PATCH] avfilter: add multiply video filter --- 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(-) create mode 100644 libavfilter/vf_multiply.c 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 +@section multiply +Multiply first video stream pixels values with second video stream pixels values. + +The filter accepts the following options: + +@table @option +@item scale +Set the scale applied to second video stream. By default is @code{1}. +Allowed range is from @code{0} to @code{9}. + +@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}. + +@item planes +Specify planes from input video stream that will be processed. +By default all planes are processed. +@end table + +@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, +};