From: Xuewei Meng <xwmen...@gmail.com>
Signed-off-by: Xuewei Meng <xwmen...@gmail.com>
---
doc/filters.texi | 21 +++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_guided.c | 381 +++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 404 insertions(+)
create mode 100644 libavfilter/vf_guided.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 36e35a1..d027ce9 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -12918,6 +12918,27 @@ greyedge=difford=1:minknorm=0:sigma=2
@end itemize
+@section guided filter
+Apply guided filter for dehazing, deraining and denoising.
+
+The filter accepts the following options:
+@table @option
+@item radius
+Set the radius in pixels.
+Allowed range is 1 to 20. Default is 3.
+
+@item eps
+Set regularization parameter.
+Allowed range is 0 to 1. Default is 0.2.
+
+@item planes
+Set planes to filter. Default is first only.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@anchor{haldclut}
@section haldclut
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 5a28736..7091508 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -284,6 +284,7 @@ OBJS-$(CONFIG_GBLUR_FILTER) += vf_gblur.o
OBJS-$(CONFIG_GEQ_FILTER) += vf_geq.o
OBJS-$(CONFIG_GRADFUN_FILTER) += vf_gradfun.o
OBJS-$(CONFIG_GRAPHMONITOR_FILTER) += f_graphmonitor.o
+OBJS-$(CONFIG_GUIDED_FILTER) += vf_guided.o
OBJS-$(CONFIG_GREYEDGE_FILTER) += vf_colorconstancy.o
OBJS-$(CONFIG_HALDCLUT_FILTER) += vf_lut3d.o framesync.o
OBJS-$(CONFIG_HFLIP_FILTER) += vf_hflip.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 931d7db..962f656 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -270,6 +270,7 @@ extern const AVFilter ff_vf_geq;
extern const AVFilter ff_vf_gradfun;
extern const AVFilter ff_vf_graphmonitor;
extern const AVFilter ff_vf_greyedge;
+extern const AVFilter ff_vf_guided;
extern const AVFilter ff_vf_haldclut;
extern const AVFilter ff_vf_hflip;
extern const AVFilter ff_vf_histeq;
diff --git a/libavfilter/vf_guided.c b/libavfilter/vf_guided.c
new file mode 100644
index 0000000..715550f
--- /dev/null
+++ b/libavfilter/vf_guided.c
@@ -0,0 +1,381 @@
+/*
+ * Copyright (c) 2021 Xuewei Mengs
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE
+ * SOFTWARE.
+ */
+
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "framesync.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct GuidedContext {
+ const AVClass *class;
+ FFFrameSync fs;
+
+ int radius;
+ float eps;
+
+ int planes;
+
+ int width;
+ int height;
+
+ int nb_planes;
+ int depth;
+ int planewidth[4];
+ int planeheight[4];
+} GuidedContext;
+
+#define OFFSET(x) offsetof(GuidedContext, x)
+#define FLAGS
AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+static const AVOption guided_options[] = {
+ { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT,
{.i64=3 }, 1, 20, FLAGS },
+ { "eps", "set eps", OFFSET(eps), AV_OPT_TYPE_FLOAT,
{.dbl=0.2 }, 0.0, 1, FLAGS },
+ { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT,
{.i64=1 }, 0, 0xF, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(guided);
+
+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_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)
+{
+ AVFilterContext *ctx = inlink->dst;
+ GuidedContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
+ ctx->inputs[0]->h != ctx->inputs[1]->h) {
+ av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be
same.\n");
+ return AVERROR(EINVAL);
+ }
+ if (ctx->inputs[0]->format != ctx->inputs[1]->format) {
+ av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n");
+ return AVERROR(EINVAL);
+ }
+
+
+ s->depth = desc->comp[0].depth;
+ s->width = ctx->inputs[0]->w;
+ s->height = ctx->inputs[0]->h;
+
+ 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);
+ return 0;
+}
+
+#define BOX(type, name)
\
+static inline void box_##name(type *dst, int dst_stride, const type *src,
\
+ int src_stride, int radius, int width, int
height)\
+{
\
+ int w;
\
+ int numPix;
\
+ w = (radius << 1) + 1;
\
+ numPix = w * w;
\
+ for (int i = 0;i < height;i++) {
\
+ for (int j = 0;j < width;j++) {
\
+ float temp = 0.0;
\
+ for (int row = -radius;row <= radius;row++) {
\
+ for (int col = -radius;col <= radius;col++) {
\
+ int x = i + row;
\
+ int y = j + col;
\
+ x = (x < 0) ? 0 : (x >= height ? height - 1 : x);
\
+ y = (y < 0) ? 0 : (y >= width ? width - 1 : y);
\
+ temp += src[x * src_stride + y];
\
+ }
\
+ }
\
+ dst[i * dst_stride + j] = temp / numPix;
\
+ }
\
+ }
\
+}
+
+BOX(float, byte)
+
+#undef BOX
+
+#define GUIDED(type, name)
\
+static void guided_##name(GuidedContext *s, const uint8_t *ssrc, const uint8_t
*ssrcRef,\
+ uint8_t *ddst, int radius, float eps, int width, int
height, \
+ int src_stride, int src_ref_stride, int dst_stride)
\
+{
\
+ type *dst = (type *)ddst;
\
+ const type *src = (const type *)ssrc;
\
+ const type *srcRef = (const type *)ssrcRef;
\
+ float *I;
\
+ float *II;
\
+ float *P;
\
+ float *IP;
\
+ float *meanI;
\
+ float *meanII;
\
+ float *meanP;
\
+ float *meanIP;
\
+ float *A;
\
+ float *B;
\
+ float *meanA;
\
+ float *meanB;
\
+
\
+ I = av_calloc(width * height, sizeof(float));
\
+ II = av_calloc(width * height, sizeof(float));
\
+ P = av_calloc(width * height, sizeof(float));
\
+ IP = av_calloc(width * height, sizeof(float));
\
+ meanI = av_calloc(width * height, sizeof(float));
\
+ meanII = av_calloc(width * height, sizeof(float));
\
+ meanP = av_calloc(width * height, sizeof(float));
\
+ meanIP = av_calloc(width * height, sizeof(float));
\
+
\
+ A = av_calloc(width * height, sizeof(float));
\
+ B = av_calloc(width * height, sizeof(float));
\
+ meanA = av_calloc(width * height, sizeof(float));
\
+ meanB = av_calloc(width * height, sizeof(float));
\
+
\
+ for (int i = 0;i < height;i++) {
\
+ for (int j = 0;j < width;j++) {
\
+ int x = i * width + j;
\
+ I[x] = src[i * src_stride + j];
\
+ II[x] = src[i * src_stride + j] * src[i * src_stride + j];
\
+ P[x] = srcRef[i * src_ref_stride + j];
\
+ IP[x] = src[i * src_stride + j] * srcRef[i * src_ref_stride + j];
\
+ }
\
+ }
\
+
\
+ box_byte(meanI, width, I, width, radius, width, height);
\
+ box_byte(meanII, width, II, width, radius, width, height);
\
+ box_byte(meanP, width, P, width, radius, width, height);
\
+ box_byte(meanIP, width, IP, width, radius, width, height);
\
+
\
+ for (int i = 0;i < height;i++) {
\
+ for (int j = 0;j < width;j++) {
\
+ int x = i * width + j;
\
+ float varI = meanII[x] - (meanI[x] * meanI[x]);
\
+ float covIP = meanIP[x] - (meanI[x] * meanP[x]);
\
+ A[x] = covIP / (varI + eps);
\
+ B[x] = meanP[x] - A[x] * meanI[x];
\
+ }
\
+ }
\
+
\
+ box_byte(meanA, width, A, width, radius, width, height);
\
+ box_byte(meanB, width, B, width, radius, width, height);
\
+
\
+ for (int i = 0;i < height;i++) {
\
+ for (int j = 0;j < width;j++) {
\
+ int x = i * width + j;
\
+ dst[i * dst_stride + j] = meanA[x] * src[i * src_stride + j] +
meanB[x]; \
+ }
\
+ }
\
+ av_freep(&I);
\
+ av_freep(&II);
\
+ av_freep(&P);
\
+ av_freep(&IP);
\
+ av_freep(&meanI);
\
+ av_freep(&meanII);
\
+ av_freep(&meanP);
\
+ av_freep(&meanIP);
\
+ av_freep(&A);
\
+ av_freep(&B);
\
+ av_freep(&meanA);
\
+ av_freep(&meanB);
\
+}
+
+GUIDED(uint8_t, byte)
+GUIDED(uint16_t, word)
+
+static int process_frame(FFFrameSync *fs)
+{
+ AVFilterContext *ctx = fs->parent;
+ GuidedContext *s = fs->opaque;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out_frame = NULL, *main_frame = NULL, *ref_frame = NULL;
+ int ret;
+
+ ret = ff_framesync_dualinput_get(fs, &main_frame, &ref_frame);
+ if (ret < 0)
+ return ret;
+
+ out_frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out_frame) {
+ av_frame_free(&main_frame);
+ av_frame_free(&ref_frame);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out_frame, main_frame);
+
+ if (ctx->is_disabled || !ref_frame) {
+ av_frame_copy_props(ref_frame, main_frame);
+ }
+
+ for (int plane = 0; plane < s->nb_planes; plane++) {
+ if (!(s->planes & (1 << plane))) {
+ av_image_copy_plane(out_frame->data[plane],
out_frame->linesize[plane],
+ main_frame->data[plane],
main_frame->linesize[plane],
+ s->planewidth[plane] * ((s->depth + 7) / 8),
s->planeheight[plane]);
+ continue;
+ }
+ if (s->depth <= 8)
+ guided_byte(s, main_frame->data[plane], ref_frame->data[plane],
out_frame->data[plane], s->radius, s->eps,
+ s->planewidth[plane], s->planeheight[plane],
+ main_frame->linesize[plane],
ref_frame->linesize[plane], out_frame->linesize[plane]);
+ else
+ guided_word(s, main_frame->data[plane], ref_frame->data[plane],
out_frame->data[plane], s->radius, s->eps,
+ s->planewidth[plane], s->planeheight[plane],
+ main_frame->linesize[plane] / 2,
ref_frame->linesize[plane] / 2, out_frame->linesize[plane] / 2);
+ }
+
+ return ff_filter_frame(outlink, out_frame);
+}
+
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+
+ GuidedContext *s = ctx->priv;
+ AVFilterLink *mainlink = ctx->inputs[0];
+ FFFrameSyncIn *in;
+ int ret;
+
+
+ outlink->w = mainlink->w;
+ outlink->h = mainlink->h;
+ outlink->time_base = mainlink->time_base;
+ outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
+ outlink->frame_rate = mainlink->frame_rate;
+ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
+ return ret;
+
+ outlink->time_base = s->fs.time_base;
+
+ in = s->fs.in;
+ in[0].time_base = mainlink->time_base;
+ in[1].time_base = ctx->inputs[1]->time_base;
+ in[0].sync = 2;
+ in[0].before = EXT_INFINITY;
+ in[0].after = EXT_INFINITY;
+ in[1].sync = 1;
+ in[1].before = EXT_INFINITY;
+ in[1].after = EXT_INFINITY;
+ s->fs.opaque = s;
+ s->fs.on_event = process_frame;
+
+ return ff_framesync_configure(&s->fs);
+}
+
+static int activate(AVFilterContext *ctx)
+{
+ GuidedContext *s = ctx->priv;
+ return ff_framesync_activate(&s->fs);
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ GuidedContext *s = ctx->priv;
+ ff_framesync_uninit(&s->fs);
+ return;
+}
+
+
+static int process_command(AVFilterContext *ctx,
+ const char *cmd,
+ const char *arg,
+ char *res,
+ int res_len,
+ int flags)
+{
+ int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
+
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const AVFilterPad guided_inputs[] = {
+ {
+ .name = "main",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },{
+ .name = "reference",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad guided_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_guided = {
+ .name = "guided",
+ .description = NULL_IF_CONFIG_SMALL("Apply Guided filter."),
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .priv_size = sizeof(GuidedContext),
+ .priv_class = &guided_class,
+ .activate = activate,
+ .inputs = guided_inputs,
+ .outputs = guided_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+ .process_command = process_command,
+};
--
1.9.1
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