avfilter: add chromanr video filter

4 files changed, 260 insertions, 1 deletions

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,
+};