[FFmpeg-devel] [PATCH] avfilter: add dblur video filter
Paul B Mahol
onemda at gmail.com
Wed May 27 15:22:34 EEST 2020
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 23 +++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_dblur.c | 307 +++++++++++++++++++++++++++++++++++++++
4 files changed, 332 insertions(+)
create mode 100644 libavfilter/vf_dblur.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 7675a0e9b1..c5fc2da8bc 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8633,6 +8633,29 @@ Set background opacity.
Set display number format. Can be @code{hex}, or @code{dec}. Default is @code{hex}.
@end table
+ at section dblur
+Apply Directional blur filter.
+
+The filter accepts the following options:
+
+ at table @option
+ at item angle
+Set angle of directional blur. Default is @code{45}.
+
+ at item radius
+Set radius of directional blur. Default is @code{5}.
+
+ at item planes
+Set which planes to filter. By default all planes are filtered.
+ at end table
+
+ at subsection Commands
+This filter supports same @ref{commands} as options.
+The command accepts the same syntax of the corresponding option.
+
+If the specified expression is not valid, it is kept at its current
+value.
+
@section dctdnoiz
Denoise frames using 2D DCT (frequency domain filtering).
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 497297d0a6..6ffad8381b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -206,6 +206,7 @@ OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
OBJS-$(CONFIG_CUE_FILTER) += f_cue.o
OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
OBJS-$(CONFIG_DATASCOPE_FILTER) += vf_datascope.o
+OBJS-$(CONFIG_DBLUR_FILTER) += vf_dblur.o
OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
OBJS-$(CONFIG_DEBLOCK_FILTER) += vf_deblock.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 9605ce9367..520816be5e 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -194,6 +194,7 @@ extern AVFilter ff_vf_cropdetect;
extern AVFilter ff_vf_cue;
extern AVFilter ff_vf_curves;
extern AVFilter ff_vf_datascope;
+extern AVFilter ff_vf_dblur;
extern AVFilter ff_vf_dctdnoiz;
extern AVFilter ff_vf_deband;
extern AVFilter ff_vf_deblock;
diff --git a/libavfilter/vf_dblur.c b/libavfilter/vf_dblur.c
new file mode 100644
index 0000000000..cc127da73f
--- /dev/null
+++ b/libavfilter/vf_dblur.c
@@ -0,0 +1,307 @@
+/*
+ * 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/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct DBlurContext {
+ const AVClass *class;
+
+ float angle;
+ float radius;
+ int planes;
+
+ float b0, b1, q, c, R3;
+
+ int depth;
+ int planewidth[4];
+ int planeheight[4];
+ float *buffer;
+ int nb_planes;
+ void (*horiz_slice)(float *buffer, int width, int height, int steps, float nu, float bscale);
+} DBlurContext;
+
+#define OFFSET(x) offsetof(DBlurContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+static const AVOption dblur_options[] = {
+ { "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS },
+ { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS },
+ { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(dblur);
+
+#define f(n, m) (dst[(n) * width + (m)])
+
+static int filter_horizontally(AVFilterContext *ctx, int width, int height)
+{
+ DBlurContext *s = ctx->priv;
+ const float b0 = s->b0;
+ const float b1 = s->b1;
+ const float q = s->q;
+ const float c = s->c;
+ float *dst = s->buffer;
+ float g;
+
+ if (s->R3 > 0) {
+ for (int y = 1; y < height - 1; y++) {
+ g = q * f(0, 0) + c * f(0, 0);
+ for (int x = 0; x < width; x++) {
+ f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
+ g = q * f(y, x) + c * f(y - 1, x);
+ }
+ }
+
+ for (int y = height - 2; y >= 0; y--) {
+ g = q * f(y, width - 1) + c * f(y, width - 1);
+ for (int x = width - 1; x >= 0; x--) {
+ f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
+ g = q * f(y, x) + c * f(y + 1, x);
+ }
+ }
+ } else {
+ for (int y = 1; y < height - 1; y++) {
+ g = q * f(0, width - 1) + c * f(0, width - 1);
+ for (int x = width - 1; x >= 0; x--) {
+ f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
+ g = q * f(y, x) + c * f(y - 1, x);
+ }
+ }
+
+ for (int y = height - 2; y >= 0; y--) {
+ g = q * f(y, 0) + c * f(y, 0);
+ for (int x = 0; x < width; x++) {
+ f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
+ g = q * f(y, x) + c * f(y + 1, x);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void diriir2d(AVFilterContext *ctx, int plane)
+{
+ DBlurContext *s = ctx->priv;
+ const int width = s->planewidth[plane];
+ const int height = s->planeheight[plane];
+
+ filter_horizontally(ctx, width, height);
+}
+
+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 int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ DBlurContext *s = inlink->dst->priv;
+
+ s->depth = desc->comp[0].depth;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ s->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer));
+ if (!s->buffer)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+static void set_params(DBlurContext *s, float angle, float r)
+{
+ float mu, nu, R1, R2, w1, w2;
+ float a0, a1, a2, a3;
+
+ angle = angle * M_PI / 180.f;
+
+ mu = cosf(angle);
+ nu = sinf(angle);
+ R1 = (mu * r) * (mu * r);
+ R2 = (nu * r) * (nu * r);
+ s->R3 = mu * nu * r * r;
+ w1 = sqrtf(0.25f + R1);
+ w2 = sqrtf(0.25f + R2);
+ a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3);
+ a1 = 0.5f + w2 - a0;
+ a2 = 0.5f + w1 - a0;
+ a3 = a0 - w1 - w2;
+ s->b0 = 1.f / a0;
+ s->b1 = -a2 / a0;
+ s->q = -a1 / a0;
+ s->c = -a3 / a0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ DBlurContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out;
+ int plane;
+
+ set_params(s, s->angle, s->radius);
+
+ if (av_frame_is_writable(in)) {
+ out = in;
+ } else {
+ 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);
+ }
+
+ for (plane = 0; plane < s->nb_planes; plane++) {
+ const int height = s->planeheight[plane];
+ const int width = s->planewidth[plane];
+ float *bptr = s->buffer;
+ const uint8_t *src = in->data[plane];
+ const uint16_t *src16 = (const uint16_t *)in->data[plane];
+ uint8_t *dst = out->data[plane];
+ uint16_t *dst16 = (uint16_t *)out->data[plane];
+ int y, x;
+
+ if (!(s->planes & (1 << plane))) {
+ if (out != in)
+ av_image_copy_plane(out->data[plane], out->linesize[plane],
+ in->data[plane], in->linesize[plane],
+ width * ((s->depth + 7) / 8), height);
+ continue;
+ }
+
+ if (s->depth == 8) {
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ bptr[x] = src[x];
+ }
+ bptr += width;
+ src += in->linesize[plane];
+ }
+ } else {
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ bptr[x] = src16[x];
+ }
+ bptr += width;
+ src16 += in->linesize[plane] / 2;
+ }
+ }
+
+ diriir2d(ctx, plane);
+
+ bptr = s->buffer;
+ if (s->depth == 8) {
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ dst[x] = bptr[x];
+ }
+ bptr += width;
+ dst += out->linesize[plane];
+ }
+ } else {
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ dst16[x] = bptr[x];
+ }
+ bptr += width;
+ dst16 += out->linesize[plane] / 2;
+ }
+ }
+ }
+
+ if (out != in)
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DBlurContext *s = ctx->priv;
+
+ av_freep(&s->buffer);
+}
+
+static const AVFilterPad dblur_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad dblur_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_dblur = {
+ .name = "dblur",
+ .description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."),
+ .priv_size = sizeof(DBlurContext),
+ .priv_class = &dblur_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = dblur_inputs,
+ .outputs = dblur_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+ .process_command = ff_filter_process_command,
+};
--
2.17.1
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