git.sesse.net Git - ffmpeg/blob - libavfilter/vf_chromanr.c

   1 /*
   2  * Copyright (c) 2020 Paul B Mahol
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "libavutil/avstring.h"
  22 #include "libavutil/imgutils.h"
  23 #include "libavutil/opt.h"
  24 #include "libavutil/pixdesc.h"
  25
  26 #include "avfilter.h"
  27 #include "formats.h"
  28 #include "internal.h"
  29 #include "video.h"
  30
  31 typedef struct ChromaNRContext {
  32     const AVClass *class;
  33
  34     float threshold;
  35     int thres;
  36     int sizew;
  37     int sizeh;
  38     int stepw;
  39     int steph;
  40     int depth;
  41     int chroma_w;
  42     int chroma_h;
  43     int nb_planes;
  44     int linesize[4];
  45     int planeheight[4];
  46     int planewidth[4];
  47
  48     AVFrame *out;
  49     int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  50 } ChromaNRContext;
  51
  52 static int query_formats(AVFilterContext *ctx)
  53 {
  54     static const enum AVPixelFormat pix_fmts[] = {
  55         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
  56         AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
  57         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
  58         AV_PIX_FMT_YUV420P9,   AV_PIX_FMT_YUV422P9,   AV_PIX_FMT_YUV444P9,
  59         AV_PIX_FMT_YUV420P10,  AV_PIX_FMT_YUV422P10,  AV_PIX_FMT_YUV444P10,
  60         AV_PIX_FMT_YUV444P12,  AV_PIX_FMT_YUV422P12,  AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
  61         AV_PIX_FMT_YUV444P14,  AV_PIX_FMT_YUV422P14,  AV_PIX_FMT_YUV420P14,
  62         AV_PIX_FMT_YUV420P16,  AV_PIX_FMT_YUV422P16,  AV_PIX_FMT_YUV444P16,
  63         AV_PIX_FMT_YUVA420P9,  AV_PIX_FMT_YUVA422P9,  AV_PIX_FMT_YUVA444P9,
  64         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  65         AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
  66         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  67         AV_PIX_FMT_NONE
  68     };
  69
  70     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
  71     if (!fmts_list)
  72         return AVERROR(ENOMEM);
  73     return ff_set_common_formats(ctx, fmts_list);
  74 }
  75
  76 #define FILTER_FUNC(name, type)                                                        \
  77 static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
  78 {                                                                                        \
  79     ChromaNRContext *s = ctx->priv;                                                      \
  80     AVFrame *in = arg;                                                                   \
  81     AVFrame *out = s->out;                                                               \
  82     const int in_ylinesize = in->linesize[0];                                            \
  83     const int in_ulinesize = in->linesize[1];                                            \
  84     const int in_vlinesize = in->linesize[2];                                            \
  85     const int out_ulinesize = out->linesize[1];                                          \
  86     const int out_vlinesize = out->linesize[2];                                          \
  87     const int chroma_w = s->chroma_w;                                                    \
  88     const int chroma_h = s->chroma_h;                                                    \
  89     const int stepw = s->stepw;                                                          \
  90     const int steph = s->steph;                                                          \
  91     const int sizew = s->sizew;                                                          \
  92     const int sizeh = s->sizeh;                                                          \
  93     const int thres = s->thres;                                                          \
  94     const int h = s->planeheight[1];                                                     \
  95     const int w = s->planewidth[1];                                                      \
  96     const int slice_start = (h * jobnr) / nb_jobs;                                       \
  97     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                     \
  98     type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize);               \
  99     type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize);               \
 100                                                                                          \
 101     {                                                                                    \
 102         const int h = s->planeheight[0];                                                 \
 103         const int slice_start = (h * jobnr) / nb_jobs;                                   \
 104         const int slice_end = (h * (jobnr+1)) / nb_jobs;                                 \
 105                                                                                          \
 106         av_image_copy_plane(out->data[0] + slice_start * out->linesize[0],               \
 107                             out->linesize[0],                                            \
 108                             in->data[0] + slice_start * in->linesize[0],                 \
 109                             in->linesize[0],                                             \
 110                             s->linesize[0], slice_end - slice_start);                    \
 111                                                                                          \
 112         if (s->nb_planes == 4) {                                                         \
 113             av_image_copy_plane(out->data[3] + slice_start * out->linesize[3],           \
 114                                 out->linesize[3],                                        \
 115                                 in->data[3] + slice_start * in->linesize[3],             \
 116                                 in->linesize[3],                                         \
 117                                 s->linesize[3], slice_end - slice_start);                \
 118         }                                                                                \
 119     }                                                                                    \
 120                                                                                          \
 121     for (int y = slice_start; y < slice_end; y++) {                                      \
 122         const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
 123         const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize);            \
 124         const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize);            \
 125                                                                                          \
 126         for (int x = 0; x < w; x++) {                                                    \
 127             const int cy = in_yptr[x * chroma_w];                                        \
 128             const int cu = in_uptr[x];                                                   \
 129             const int cv = in_vptr[x];                                                   \
 130             int su = cu;                                                                 \
 131             int sv = cv;                                                                 \
 132             int cn = 1;                                                                  \
 133                                                                                          \
 134             for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) {           \
 135                 const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
 136                 const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize);            \
 137                 const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize);            \
 138                                                                                                   \
 139                 for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) {       \
 140                     const int Y = in_yptr[xx * chroma_w];                              \
 141                     const int U = in_uptr[xx];                                         \
 142                     const int V = in_vptr[xx];                                         \
 143                                                                                        \
 144                     if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres &&       \
 145                         xx != x && yy != y) {                                          \
 146                         su += U;                                                       \
 147                         sv += V;                                                       \
 148                         cn++;                                                          \
 149                     }                                                                  \
 150                 }                                                                      \
 151             }                                                                          \
 152                                                                                        \
 153             out_uptr[x] = su / cn;                                                     \
 154             out_vptr[x] = sv / cn;                                                     \
 155         }                                                                              \
 156                                                                                        \
 157         out_uptr += out_ulinesize / sizeof(type);                                      \
 158         out_vptr += out_vlinesize / sizeof(type);                                      \
 159     }                                                                                  \
 160                                                                                        \
 161     return 0;                                                                          \
 162 }
 163
 164 FILTER_FUNC(8,  uint8_t)
 165 FILTER_FUNC(16, uint16_t)
 166
 167 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 168 {
 169     AVFilterContext *ctx = inlink->dst;
 170     AVFilterLink *outlink = ctx->outputs[0];
 171     ChromaNRContext *s = ctx->priv;
 172     AVFrame *out;
 173
 174     s->thres = s->threshold * (1 << (s->depth - 8));
 175
 176     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 177     if (!out) {
 178         av_frame_free(&in);
 179         return AVERROR(ENOMEM);
 180     }
 181
 182     av_frame_copy_props(out, in);
 183     s->out = out;
 184     ctx->internal->execute(ctx, s->filter_slice, in, NULL,
 185                            FFMIN3(s->planeheight[1],
 186                                   s->planeheight[2],
 187                                   ff_filter_get_nb_threads(ctx)));
 188
 189     av_frame_free(&in);
 190     return ff_filter_frame(outlink, out);
 191 }
 192
 193 static int config_input(AVFilterLink *inlink)
 194 {
 195     AVFilterContext *ctx = inlink->dst;
 196     ChromaNRContext *s = ctx->priv;
 197     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 198     int ret;
 199
 200     s->nb_planes = desc->nb_components;
 201     s->depth = desc->comp[0].depth;
 202     s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
 203     s->chroma_w = 1 << desc->log2_chroma_w;
 204     s->chroma_h = 1 << desc->log2_chroma_h;
 205     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 206     s->planeheight[0] = s->planeheight[3] = inlink->h;
 207     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 208     s->planewidth[0] = s->planewidth[3] = inlink->w;
 209
 210     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
 211         return ret;
 212
 213     return 0;
 214 }
 215
 216 #define OFFSET(x) offsetof(ChromaNRContext, x)
 217 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
 218
 219 static const AVOption chromanr_options[] = {
 220     { "thres", "set u/v threshold",   OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
 221     { "sizew", "set horizontal size", OFFSET(sizew),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
 222     { "sizeh", "set vertical size",   OFFSET(sizeh),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
 223     { "stepw", "set horizontal step", OFFSET(stepw),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
 224     { "steph", "set vertical step",   OFFSET(steph),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
 225     { NULL }
 226 };
 227
 228 static const AVFilterPad inputs[] = {
 229     {
 230         .name         = "default",
 231         .type         = AVMEDIA_TYPE_VIDEO,
 232         .filter_frame = filter_frame,
 233         .config_props = config_input,
 234     },
 235     { NULL }
 236 };
 237
 238 static const AVFilterPad outputs[] = {
 239     {
 240         .name = "default",
 241         .type = AVMEDIA_TYPE_VIDEO,
 242     },
 243     { NULL }
 244 };
 245
 246 AVFILTER_DEFINE_CLASS(chromanr);
 247
 248 AVFilter ff_vf_chromanr = {
 249     .name          = "chromanr",
 250     .description   = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
 251     .priv_size     = sizeof(ChromaNRContext),
 252     .priv_class    = &chromanr_class,
 253     .query_formats = query_formats,
 254     .outputs       = outputs,
 255     .inputs        = inputs,
 256     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 257     .process_command = ff_filter_process_command,
 258 };