--- /dev/null
+/*
+ * 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,
+};
projects / ffmpeg / commitdiff