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     float threshold_y;
  36     float threshold_u;
  37     float threshold_v;
  38     int thres;
  39     int thres_y;
  40     int thres_u;
  41     int thres_v;
  42     int sizew;
  43     int sizeh;
  44     int stepw;
  45     int steph;
  46     int depth;
  47     int chroma_w;
  48     int chroma_h;
  49     int nb_planes;
  50     int linesize[4];
  51     int planeheight[4];
  52     int planewidth[4];
  53
  54     AVFrame *out;
  55     int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  56 } ChromaNRContext;
  57
  58 static int query_formats(AVFilterContext *ctx)
  59 {
  60     static const enum AVPixelFormat pix_fmts[] = {
  61         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV444P,
  62         AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
  63         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
  64         AV_PIX_FMT_YUV420P9,   AV_PIX_FMT_YUV422P9,   AV_PIX_FMT_YUV444P9,
  65         AV_PIX_FMT_YUV420P10,  AV_PIX_FMT_YUV422P10,  AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV444P10,
  66         AV_PIX_FMT_YUV444P12,  AV_PIX_FMT_YUV422P12,  AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
  67         AV_PIX_FMT_YUV444P14,  AV_PIX_FMT_YUV422P14,  AV_PIX_FMT_YUV420P14,
  68         AV_PIX_FMT_YUV420P16,  AV_PIX_FMT_YUV422P16,  AV_PIX_FMT_YUV444P16,
  69         AV_PIX_FMT_YUVA420P9,  AV_PIX_FMT_YUVA422P9,  AV_PIX_FMT_YUVA444P9,
  70         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  71         AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
  72         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  73         AV_PIX_FMT_NONE
  74     };
  75
  76     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
  77     if (!fmts_list)
  78         return AVERROR(ENOMEM);
  79     return ff_set_common_formats(ctx, fmts_list);
  80 }
  81
  82 #define FILTER_FUNC(name, type)                                                        \
  83 static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
  84 {                                                                                        \
  85     ChromaNRContext *s = ctx->priv;                                                      \
  86     AVFrame *in = arg;                                                                   \
  87     AVFrame *out = s->out;                                                               \
  88     const int in_ylinesize = in->linesize[0];                                            \
  89     const int in_ulinesize = in->linesize[1];                                            \
  90     const int in_vlinesize = in->linesize[2];                                            \
  91     const int out_ulinesize = out->linesize[1];                                          \
  92     const int out_vlinesize = out->linesize[2];                                          \
  93     const int chroma_w = s->chroma_w;                                                    \
  94     const int chroma_h = s->chroma_h;                                                    \
  95     const int stepw = s->stepw;                                                          \
  96     const int steph = s->steph;                                                          \
  97     const int sizew = s->sizew;                                                          \
  98     const int sizeh = s->sizeh;                                                          \
  99     const int thres = s->thres;                                                          \
 100     const int thres_y = s->thres_y;                                                      \
 101     const int thres_u = s->thres_u;                                                      \
 102     const int thres_v = s->thres_v;                                                      \
 103     const int h = s->planeheight[1];                                                     \
 104     const int w = s->planewidth[1];                                                      \
 105     const int slice_start = (h * jobnr) / nb_jobs;                                       \
 106     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                     \
 107     type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize);               \
 108     type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize);               \
 109                                                                                          \
 110     {                                                                                    \
 111         const int h = s->planeheight[0];                                                 \
 112         const int slice_start = (h * jobnr) / nb_jobs;                                   \
 113         const int slice_end = (h * (jobnr+1)) / nb_jobs;                                 \
 114                                                                                          \
 115         av_image_copy_plane(out->data[0] + slice_start * out->linesize[0],               \
 116                             out->linesize[0],                                            \
 117                             in->data[0] + slice_start * in->linesize[0],                 \
 118                             in->linesize[0],                                             \
 119                             s->linesize[0], slice_end - slice_start);                    \
 120                                                                                          \
 121         if (s->nb_planes == 4) {                                                         \
 122             av_image_copy_plane(out->data[3] + slice_start * out->linesize[3],           \
 123                                 out->linesize[3],                                        \
 124                                 in->data[3] + slice_start * in->linesize[3],             \
 125                                 in->linesize[3],                                         \
 126                                 s->linesize[3], slice_end - slice_start);                \
 127         }                                                                                \
 128     }                                                                                    \
 129                                                                                          \
 130     for (int y = slice_start; y < slice_end; y++) {                                      \
 131         const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
 132         const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize);            \
 133         const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize);            \
 134                                                                                          \
 135         for (int x = 0; x < w; x++) {                                                    \
 136             const int cy = in_yptr[x * chroma_w];                                        \
 137             const int cu = in_uptr[x];                                                   \
 138             const int cv = in_vptr[x];                                                   \
 139             int su = cu;                                                                 \
 140             int sv = cv;                                                                 \
 141             int cn = 1;                                                                  \
 142                                                                                          \
 143             for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) {           \
 144                 const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
 145                 const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize);            \
 146                 const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize);            \
 147                                                                                                   \
 148                 for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) {       \
 149                     const int Y = in_yptr[xx * chroma_w];                              \
 150                     const int U = in_uptr[xx];                                         \
 151                     const int V = in_vptr[xx];                                         \
 152                                                                                        \
 153                     if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres &&       \
 154                         FFABS(cu - U) < thres_u && FFABS(cv - V) < thres_v &&          \
 155                         FFABS(cy - Y) < thres_y &&                                     \
 156                         xx != x && yy != y) {                                          \
 157                         su += U;                                                       \
 158                         sv += V;                                                       \
 159                         cn++;                                                          \
 160                     }                                                                  \
 161                 }                                                                      \
 162             }                                                                          \
 163                                                                                        \
 164             out_uptr[x] = su / cn;                                                     \
 165             out_vptr[x] = sv / cn;                                                     \
 166         }                                                                              \
 167                                                                                        \
 168         out_uptr += out_ulinesize / sizeof(type);                                      \
 169         out_vptr += out_vlinesize / sizeof(type);                                      \
 170     }                                                                                  \
 171                                                                                        \
 172     return 0;                                                                          \
 173 }
 174
 175 FILTER_FUNC(8,  uint8_t)
 176 FILTER_FUNC(16, uint16_t)
 177
 178 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 179 {
 180     AVFilterContext *ctx = inlink->dst;
 181     AVFilterLink *outlink = ctx->outputs[0];
 182     ChromaNRContext *s = ctx->priv;
 183     AVFrame *out;
 184
 185     s->thres = s->threshold * (1 << (s->depth - 8));
 186     s->thres_y = s->threshold_y * (1 << (s->depth - 8));
 187     s->thres_u = s->threshold_u * (1 << (s->depth - 8));
 188     s->thres_v = s->threshold_v * (1 << (s->depth - 8));
 189
 190     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 191     if (!out) {
 192         av_frame_free(&in);
 193         return AVERROR(ENOMEM);
 194     }
 195
 196     av_frame_copy_props(out, in);
 197     s->out = out;
 198     ctx->internal->execute(ctx, s->filter_slice, in, NULL,
 199                            FFMIN3(s->planeheight[1],
 200                                   s->planeheight[2],
 201                                   ff_filter_get_nb_threads(ctx)));
 202
 203     av_frame_free(&in);
 204     return ff_filter_frame(outlink, out);
 205 }
 206
 207 static int config_input(AVFilterLink *inlink)
 208 {
 209     AVFilterContext *ctx = inlink->dst;
 210     ChromaNRContext *s = ctx->priv;
 211     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 212     int ret;
 213
 214     s->nb_planes = desc->nb_components;
 215     s->depth = desc->comp[0].depth;
 216     s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
 217     s->chroma_w = 1 << desc->log2_chroma_w;
 218     s->chroma_h = 1 << desc->log2_chroma_h;
 219     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 220     s->planeheight[0] = s->planeheight[3] = inlink->h;
 221     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 222     s->planewidth[0] = s->planewidth[3] = inlink->w;
 223
 224     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
 225         return ret;
 226
 227     return 0;
 228 }
 229
 230 #define OFFSET(x) offsetof(ChromaNRContext, x)
 231 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
 232
 233 static const AVOption chromanr_options[] = {
 234     { "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
 235     { "sizew", "set horizontal size", OFFSET(sizew),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
 236     { "sizeh", "set vertical size",   OFFSET(sizeh),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
 237     { "stepw", "set horizontal step", OFFSET(stepw),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
 238     { "steph", "set vertical step",   OFFSET(steph),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
 239     { "threy", "set y threshold",   OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
 240     { "threu", "set u threshold",   OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
 241     { "threv", "set v threshold",   OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
 242     { NULL }
 243 };
 244
 245 static const AVFilterPad inputs[] = {
 246     {
 247         .name         = "default",
 248         .type         = AVMEDIA_TYPE_VIDEO,
 249         .filter_frame = filter_frame,
 250         .config_props = config_input,
 251     },
 252     { NULL }
 253 };
 254
 255 static const AVFilterPad outputs[] = {
 256     {
 257         .name = "default",
 258         .type = AVMEDIA_TYPE_VIDEO,
 259     },
 260     { NULL }
 261 };
 262
 263 AVFILTER_DEFINE_CLASS(chromanr);
 264
 265 const AVFilter ff_vf_chromanr = {
 266     .name          = "chromanr",
 267     .description   = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
 268     .priv_size     = sizeof(ChromaNRContext),
 269     .priv_class    = &chromanr_class,
 270     .query_formats = query_formats,
 271     .outputs       = outputs,
 272     .inputs        = inputs,
 273     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 274     .process_command = ff_filter_process_command,
 275 };