[FFmpeg-cvslog] avfilter: add bilateral filter
Paul B Mahol
git at videolan.org
Mon Oct 21 12:50:09 EEST 2019
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun May 13 18:26:50 2018 +0200| [c6e01ebe411e6498552b2ef73b45aaef124d2264] | committer: Paul B Mahol
avfilter: add bilateral filter
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c6e01ebe411e6498552b2ef73b45aaef124d2264
---
Changelog | 1 +
doc/filters.texi | 17 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_bilateral.c | 375 +++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 396 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 44e41848b2..316589e336 100644
--- a/Changelog
+++ b/Changelog
@@ -16,6 +16,7 @@ version <next>:
- photosensitivity filter
- anlms filter
- arnndn filter
+- bilateral filter
version 4.2:
diff --git a/doc/filters.texi b/doc/filters.texi
index 234d851e8c..2ad4a5913c 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -6336,6 +6336,23 @@ The filter accepts the following option:
Set the minimal luminance value. Default is @code{16}.
@end table
+ at section bilateral
+Apply bilateral filter, spatial smoothing while preserving edges.
+
+The filter accepts the following options:
+ at table @option
+ at item sigmaS
+Set sigma of gaussian function to calculate spatial weight.
+Allowed range is 0 to 10. Default is 0.1.
+
+ at item sigmaR
+Set sigma of gaussian function to calculate range weight.
+Allowed range is 0 to 1. Default is 0.1.
+
+ at item planes
+Set planes to filter. Default is first only.
+ at end table
+
@section bitplanenoise
Show and measure bit plane noise.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index e9ac54daee..63d2fba861 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -164,6 +164,7 @@ OBJS-$(CONFIG_AVGBLUR_OPENCL_FILTER) += vf_avgblur_opencl.o opencl.o \
opencl/avgblur.o boxblur.o
OBJS-$(CONFIG_BBOX_FILTER) += bbox.o vf_bbox.o
OBJS-$(CONFIG_BENCH_FILTER) += f_bench.o
+OBJS-$(CONFIG_BILATERAL_FILTER) += vf_bilateral.o
OBJS-$(CONFIG_BITPLANENOISE_FILTER) += vf_bitplanenoise.o
OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o
OBJS-$(CONFIG_BLACKFRAME_FILTER) += vf_blackframe.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index a7a165e0d8..e4186f93db 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -155,6 +155,7 @@ extern AVFilter ff_vf_avgblur;
extern AVFilter ff_vf_avgblur_opencl;
extern AVFilter ff_vf_bbox;
extern AVFilter ff_vf_bench;
+extern AVFilter ff_vf_bilateral;
extern AVFilter ff_vf_bitplanenoise;
extern AVFilter ff_vf_blackdetect;
extern AVFilter ff_vf_blackframe;
diff --git a/libavfilter/version.h b/libavfilter/version.h
index e8c5f4ab61..869655f4bd 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 63
+#define LIBAVFILTER_VERSION_MINOR 64
#define LIBAVFILTER_VERSION_MICRO 100
diff --git a/libavfilter/vf_bilateral.c b/libavfilter/vf_bilateral.c
new file mode 100644
index 0000000000..31578a0dd5
--- /dev/null
+++ b/libavfilter/vf_bilateral.c
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2017 Ming Yang
+ * Copyright (c) 2019 Paul B Mahol
+ *
+ * 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 "internal.h"
+#include "video.h"
+
+typedef struct BilateralContext {
+ const AVClass *class;
+
+ float sigmaS;
+ float sigmaR;
+ int planes;
+
+ int nb_planes;
+ int depth;
+ int planewidth[4];
+ int planeheight[4];
+
+ float range_table[65536];
+
+ float *img_out_f;
+ float *img_temp;
+ float *map_factor_a;
+ float *map_factor_b;
+ float *slice_factor_a;
+ float *slice_factor_b;
+ float *line_factor_a;
+ float *line_factor_b;
+} BilateralContext;
+
+#define OFFSET(x) offsetof(BilateralContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption bilateral_options[] = {
+ { "sigmaS", "set spatial sigma", OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 10, FLAGS },
+ { "sigmaR", "set sigma range", OFFSET(sigmaR), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 1, FLAGS },
+ { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(bilateral);
+
+typedef struct ThreadData {
+ int height;
+ int width;
+} ThreadData;
+
+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)
+{
+ BilateralContext *s = inlink->dst->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ float inv_sigma_range;
+
+ s->depth = desc->comp[0].depth;
+ inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1));
+
+ //compute a lookup table
+ for (int i = 0; i < (1 << s->depth); i++)
+ s->range_table[i] = expf(-i * inv_sigma_range);
+
+ 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->img_out_f = av_calloc(inlink->w * inlink->h, sizeof(float));
+ s->img_temp = av_calloc(inlink->w * inlink->h, sizeof(float));
+ s->map_factor_a = av_calloc(inlink->w * inlink->h, sizeof(float));
+ s->map_factor_b = av_calloc(inlink->w * inlink->h, sizeof(float));
+ s->slice_factor_a = av_calloc(inlink->w, sizeof(float));
+ s->slice_factor_b = av_calloc(inlink->w, sizeof(float));
+ s->line_factor_a = av_calloc(inlink->w, sizeof(float));
+ s->line_factor_b = av_calloc(inlink->w, sizeof(float));
+
+ if (!s->img_out_f ||
+ !s->img_temp ||
+ !s->map_factor_a ||
+ !s->map_factor_b ||
+ !s->slice_factor_a ||
+ !s->slice_factor_a ||
+ !s->line_factor_a ||
+ !s->line_factor_a)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+#define BILATERAL(type, name) \
+static void bilateral_##name(BilateralContext *s, const uint8_t *ssrc, uint8_t *ddst, \
+ float sigma_spatial, float sigma_range, \
+ int width, int height, int src_linesize, int dst_linesize) \
+{ \
+ type *dst = (type *)ddst; \
+ const type *src = (const type *)ssrc; \
+ float *img_out_f = s->img_out_f, *img_temp = s->img_temp; \
+ float *map_factor_a = s->map_factor_a, *map_factor_b = s->map_factor_b; \
+ float *slice_factor_a = s->slice_factor_a, *slice_factor_b = s->slice_factor_b; \
+ float *line_factor_a = s->line_factor_a, *line_factor_b = s->line_factor_b; \
+ float *range_table = s->range_table; \
+ float alpha = expf(-sqrtf(2.f) / (sigma_spatial * width)); \
+ float ypr, ycr, *ycy, *ypy, *xcy, fp, fc; \
+ float inv_alpha_ = 1 - alpha; \
+ float *ycf, *ypf, *xcf, *in_factor; \
+ const type *tcy, *tpy; \
+ int h1; \
+ \
+ for (int y = 0; y < height; y++) { \
+ float *temp_factor_x, *temp_x = &img_temp[y * width]; \
+ const type *in_x = &src[y * src_linesize]; \
+ const type *texture_x = &src[y * src_linesize]; \
+ type tpr; \
+ \
+ *temp_x++ = ypr = *in_x++; \
+ tpr = *texture_x++; \
+ \
+ temp_factor_x = &map_factor_a[y * width]; \
+ *temp_factor_x++ = fp = 1; \
+ \
+ for (int x = 1; x < width; x++) { \
+ float weight, alpha_; \
+ int range_dist; \
+ type tcr = *texture_x++; \
+ type dr = abs(tcr - tpr); \
+ \
+ range_dist = dr; \
+ weight = range_table[range_dist]; \
+ alpha_ = weight*alpha; \
+ *temp_x++ = ycr = inv_alpha_*(*in_x++) + alpha_*ypr; \
+ tpr = tcr; \
+ ypr = ycr; \
+ *temp_factor_x++ = fc = inv_alpha_ + alpha_ * fp; \
+ fp = fc; \
+ } \
+ --temp_x; *temp_x = 0.5f*((*temp_x) + (*--in_x)); \
+ tpr = *--texture_x; \
+ ypr = *in_x; \
+ \
+ --temp_factor_x; *temp_factor_x = 0.5f*((*temp_factor_x) + 1); \
+ fp = 1; \
+ \
+ for (int x = width - 2; x >= 0; x--) { \
+ type tcr = *--texture_x; \
+ type dr = abs(tcr - tpr); \
+ int range_dist = dr; \
+ float weight = range_table[range_dist]; \
+ float alpha_ = weight * alpha; \
+ \
+ ycr = inv_alpha_ * (*--in_x) + alpha_ * ypr; \
+ --temp_x; *temp_x = 0.5f*((*temp_x) + ycr); \
+ tpr = tcr; \
+ ypr = ycr; \
+ \
+ fc = inv_alpha_ + alpha_*fp; \
+ --temp_factor_x; \
+ *temp_factor_x = 0.5f*((*temp_factor_x) + fc); \
+ fp = fc; \
+ } \
+ } \
+ memcpy(img_out_f, img_temp, sizeof(float) * width); \
+ \
+ alpha = expf(-sqrtf(2.f) / (sigma_spatial * height)); \
+ inv_alpha_ = 1 - alpha; \
+ in_factor = map_factor_a; \
+ memcpy(map_factor_b, in_factor, sizeof(float) * width); \
+ for (int y = 1; y < height; y++) { \
+ tpy = &src[(y - 1) * src_linesize]; \
+ tcy = &src[y * src_linesize]; \
+ xcy = &img_temp[y * width]; \
+ ypy = &img_out_f[(y - 1) * width]; \
+ ycy = &img_out_f[y * width]; \
+ \
+ xcf = &in_factor[y * width]; \
+ ypf = &map_factor_b[(y - 1) * width]; \
+ ycf = &map_factor_b[y * width]; \
+ for (int x = 0; x < width; x++) { \
+ type dr = abs((*tcy++) - (*tpy++)); \
+ int range_dist = dr; \
+ float weight = range_table[range_dist]; \
+ float alpha_ = weight*alpha; \
+ \
+ *ycy++ = inv_alpha_*(*xcy++) + alpha_*(*ypy++); \
+ *ycf++ = inv_alpha_*(*xcf++) + alpha_*(*ypf++); \
+ } \
+ } \
+ h1 = height - 1; \
+ ycf = line_factor_a; \
+ ypf = line_factor_b; \
+ memcpy(ypf, &in_factor[h1 * width], sizeof(float) * width); \
+ for (int x = 0; x < width; x++) \
+ map_factor_b[h1 * width + x] = 0.5f*(map_factor_b[h1 * width + x] + ypf[x]); \
+ \
+ ycy = slice_factor_a; \
+ ypy = slice_factor_b; \
+ memcpy(ypy, &img_temp[h1 * width], sizeof(float) * width); \
+ for (int x = 0, k = 0; x < width; x++) { \
+ int idx = h1 * width + x; \
+ img_out_f[idx] = 0.5f*(img_out_f[idx] + ypy[k++]) / map_factor_b[h1 * width + x]; \
+ } \
+ \
+ for (int y = h1 - 1; y >= 0; y--) { \
+ float *ycf_, *ypf_, *factor_; \
+ float *ycy_, *ypy_, *out_; \
+ \
+ tpy = &src[(y + 1) * src_linesize]; \
+ tcy = &src[y * src_linesize]; \
+ xcy = &img_temp[y * width]; \
+ ycy_ = ycy; \
+ ypy_ = ypy; \
+ out_ = &img_out_f[y * width]; \
+ \
+ xcf = &in_factor[y * width]; \
+ ycf_ = ycf; \
+ ypf_ = ypf; \
+ factor_ = &map_factor_b[y * width]; \
+ for (int x = 0; x < width; x++) { \
+ type dr = abs((*tcy++) - (*tpy++)); \
+ int range_dist = dr; \
+ float weight = range_table[range_dist]; \
+ float alpha_ = weight*alpha; \
+ float ycc, fcc = inv_alpha_*(*xcf++) + alpha_*(*ypf_++); \
+ \
+ *ycf_++ = fcc; \
+ *factor_ = 0.5f * (*factor_ + fcc); \
+ \
+ ycc = inv_alpha_*(*xcy++) + alpha_*(*ypy_++); \
+ *ycy_++ = ycc; \
+ *out_ = 0.5f * (*out_ + ycc) / (*factor_); \
+ out_++; \
+ factor_++; \
+ } \
+ \
+ memcpy(ypy, ycy, sizeof(float) * width); \
+ memcpy(ypf, ycf, sizeof(float) * width); \
+ } \
+ \
+ for (int i = 0; i < height; i++) \
+ for (int j = 0; j < width; j++) \
+ dst[j + i * dst_linesize] = img_out_f[i * width + j]; \
+}
+
+BILATERAL(uint8_t, byte)
+BILATERAL(uint16_t, word)
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ BilateralContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ 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);
+
+ for (int plane = 0; plane < s->nb_planes; plane++) {
+ if (!(s->planes & (1 << plane))) {
+ av_image_copy_plane(out->data[plane], out->linesize[plane],
+ in->data[plane], in->linesize[plane],
+ s->planewidth[plane] * ((s->depth + 7) / 8), s->planeheight[plane]);
+ continue;
+ }
+
+ if (s->depth <= 8)
+ bilateral_byte(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
+ s->planewidth[plane], s->planeheight[plane],
+ in->linesize[plane], out->linesize[plane]);
+ else
+ bilateral_word(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
+ s->planewidth[plane], s->planeheight[plane],
+ in->linesize[plane] / 2, out->linesize[plane] / 2);
+ }
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ BilateralContext *s = ctx->priv;
+
+ av_freep(&s->img_out_f);
+ av_freep(&s->img_temp);
+ av_freep(&s->map_factor_a);
+ av_freep(&s->map_factor_b);
+ av_freep(&s->slice_factor_a);
+ av_freep(&s->slice_factor_b);
+ av_freep(&s->line_factor_a);
+ av_freep(&s->line_factor_b);
+}
+
+static const AVFilterPad bilateral_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad bilateral_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_bilateral = {
+ .name = "bilateral",
+ .description = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
+ .priv_size = sizeof(BilateralContext),
+ .priv_class = &bilateral_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = bilateral_inputs,
+ .outputs = bilateral_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+};
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