[FFmpeg-cvslog] avfilter: add chromanr video filter
Paul B Mahol
git at videolan.org
Wed Jul 8 16:25:19 EEST 2020
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Fri Nov 16 10:13:41 2018 +0100| [6cdddb773fec5497b33eaabfde74fa6f90a5068e] | committer: Paul B Mahol
avfilter: add chromanr video filter
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6cdddb773fec5497b33eaabfde74fa6f90a5068e
---
Changelog | 1 +
doc/filters.texi | 36 +++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_chromanr.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 297 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 1bb9931c0d..b8212635ac 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@ version <next>:
- AudioToolbox output device
- MacCaption demuxer
- PGX decoder
+- chromanr video filter
version 4.3:
diff --git a/doc/filters.texi b/doc/filters.texi
index ad2448acb2..12d40029dc 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -7183,6 +7183,42 @@ ffmpeg -f lavfi -i color=c=black:s=1280x720 -i video.mp4 -shortest -filter_compl
@end example
@end itemize
+ at section chromanr
+Reduce chrominance noise.
+
+The filter accepts the following options:
+
+ at table @option
+ at item thres
+Set threshold for averaging chrominance values.
+Sum of absolute difference of U and V pixel components or current
+pixel and neighbour pixels lower than this threshold will be used in
+averaging. Luma component is left unchanged and is copied to output.
+Default value is 30. Allowed range is from 1 to 200.
+
+ at item sizew
+Set horizontal radius of rectangle used for averaging.
+Allowed range is from 1 to 100. Default value is 5.
+
+ at item sizeh
+Set vertical radius of rectangle used for averaging.
+Allowed range is from 1 to 100. Default value is 5.
+
+ at item stepw
+Set horizontal step when averaging. Default value is 1.
+Allowed range is from 1 to 50.
+Mostly useful to speed-up filtering.
+
+ at item steph
+Set vertical step when averaging. Default value is 1.
+Allowed range is from 1 to 50.
+Mostly useful to speed-up filtering.
+ at end table
+
+ at subsection Commands
+This filter supports same @ref{commands} as options.
+The command accepts the same syntax of the corresponding option.
+
@section chromashift
Shift chroma pixels horizontally and/or vertically.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 5123540653..0dc74f8b70 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -182,6 +182,7 @@ OBJS-$(CONFIG_CAS_FILTER) += vf_cas.o
OBJS-$(CONFIG_CHROMABER_VULKAN_FILTER) += vf_chromaber_vulkan.o vulkan.o
OBJS-$(CONFIG_CHROMAHOLD_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o
+OBJS-$(CONFIG_CHROMANR_FILTER) += vf_chromanr.o
OBJS-$(CONFIG_CHROMASHIFT_FILTER) += vf_chromashift.o
OBJS-$(CONFIG_CIESCOPE_FILTER) += vf_ciescope.o
OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 1183e40267..3f70153986 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -172,6 +172,7 @@ extern AVFilter ff_vf_bwdif;
extern AVFilter ff_vf_cas;
extern AVFilter ff_vf_chromahold;
extern AVFilter ff_vf_chromakey;
+extern AVFilter ff_vf_chromanr;
extern AVFilter ff_vf_chromashift;
extern AVFilter ff_vf_ciescope;
extern AVFilter ff_vf_codecview;
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 37015085fa..308fbe07c3 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 7
-#define LIBAVFILTER_VERSION_MINOR 86
+#define LIBAVFILTER_VERSION_MINOR 87
#define LIBAVFILTER_VERSION_MICRO 100
diff --git a/libavfilter/vf_chromanr.c b/libavfilter/vf_chromanr.c
new file mode 100644
index 0000000000..7cda8a8a5f
--- /dev/null
+++ b/libavfilter/vf_chromanr.c
@@ -0,0 +1,257 @@
+/*
+ * 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/avstring.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct ChromaNRContext {
+ const AVClass *class;
+
+ float threshold;
+ int thres;
+ int sizew;
+ int sizeh;
+ int stepw;
+ int steph;
+ int depth;
+ int chroma_w;
+ int chroma_h;
+ int nb_planes;
+ int linesize[4];
+ int planeheight[4];
+ int planewidth[4];
+
+ AVFrame *out;
+ int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} ChromaNRContext;
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
+ 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_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
+ 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_NONE
+ };
+
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+#define FILTER_FUNC(name, type) \
+static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
+{ \
+ ChromaNRContext *s = ctx->priv; \
+ AVFrame *in = arg; \
+ AVFrame *out = s->out; \
+ const int in_ylinesize = in->linesize[0]; \
+ const int in_ulinesize = in->linesize[1]; \
+ const int in_vlinesize = in->linesize[2]; \
+ const int out_ulinesize = out->linesize[1]; \
+ const int out_vlinesize = out->linesize[2]; \
+ const int chroma_w = s->chroma_w; \
+ const int chroma_h = s->chroma_h; \
+ const int stepw = s->stepw; \
+ const int steph = s->steph; \
+ const int sizew = s->sizew; \
+ const int sizeh = s->sizeh; \
+ const int thres = s->thres; \
+ const int h = s->planeheight[1]; \
+ const int w = s->planewidth[1]; \
+ const int slice_start = (h * jobnr) / nb_jobs; \
+ const int slice_end = (h * (jobnr+1)) / nb_jobs; \
+ type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize); \
+ type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize); \
+ \
+ { \
+ const int h = s->planeheight[0]; \
+ const int slice_start = (h * jobnr) / nb_jobs; \
+ const int slice_end = (h * (jobnr+1)) / nb_jobs; \
+ \
+ av_image_copy_plane(out->data[0] + slice_start * out->linesize[0], \
+ out->linesize[0], \
+ in->data[0] + slice_start * in->linesize[0], \
+ in->linesize[0], \
+ s->linesize[0], slice_end - slice_start); \
+ \
+ if (s->nb_planes == 4) { \
+ av_image_copy_plane(out->data[3] + slice_start * out->linesize[3], \
+ out->linesize[3], \
+ in->data[3] + slice_start * in->linesize[3], \
+ in->linesize[3], \
+ s->linesize[3], slice_end - slice_start); \
+ } \
+ } \
+ \
+ for (int y = slice_start; y < slice_end; y++) { \
+ const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
+ const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize); \
+ const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize); \
+ \
+ for (int x = 0; x < w; x++) { \
+ const int cy = in_yptr[x * chroma_w]; \
+ const int cu = in_uptr[x]; \
+ const int cv = in_vptr[x]; \
+ int su = cu; \
+ int sv = cv; \
+ int cn = 1; \
+ \
+ for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) { \
+ const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
+ const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize); \
+ const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize); \
+ \
+ for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) { \
+ const int Y = in_yptr[xx * chroma_w]; \
+ const int U = in_uptr[xx]; \
+ const int V = in_vptr[xx]; \
+ \
+ if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres && \
+ xx != x && yy != y) { \
+ su += U; \
+ sv += V; \
+ cn++; \
+ } \
+ } \
+ } \
+ \
+ out_uptr[x] = su / cn; \
+ out_vptr[x] = sv / cn; \
+ } \
+ \
+ out_uptr += out_ulinesize / sizeof(type); \
+ out_vptr += out_vlinesize / sizeof(type); \
+ } \
+ \
+ return 0; \
+}
+
+FILTER_FUNC(8, uint8_t)
+FILTER_FUNC(16, uint16_t)
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ ChromaNRContext *s = ctx->priv;
+ AVFrame *out;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+
+ av_frame_copy_props(out, in);
+ s->out = out;
+ ctx->internal->execute(ctx, s->filter_slice, in, NULL,
+ FFMIN3(s->planeheight[1],
+ s->planeheight[2],
+ ff_filter_get_nb_threads(ctx)));
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ChromaNRContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int ret;
+
+ s->nb_planes = desc->nb_components;
+ s->depth = desc->comp[0].depth;
+ s->thres = s->threshold * (1 << (s->depth - 8));
+ s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
+ s->chroma_w = 1 << desc->log2_chroma_w;
+ s->chroma_h = 1 << desc->log2_chroma_h;
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
+ return ret;
+
+ return 0;
+}
+
+#define OFFSET(x) offsetof(ChromaNRContext, x)
+#define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
+
+static const AVOption chromanr_options[] = {
+ { "thres", "set u/v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
+ { "sizew", "set horizontal size", OFFSET(sizew), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
+ { "sizeh", "set vertical size", OFFSET(sizeh), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
+ { "stepw", "set horizontal step", OFFSET(stepw), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
+ { "steph", "set vertical step", OFFSET(steph), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
+ { NULL }
+};
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(chromanr);
+
+AVFilter ff_vf_chromanr = {
+ .name = "chromanr",
+ .description = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
+ .priv_size = sizeof(ChromaNRContext),
+ .priv_class = &chromanr_class,
+ .query_formats = query_formats,
+ .outputs = outputs,
+ .inputs = inputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+ .process_command = ff_filter_process_command,
+};
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