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

   1 /*
   2  * Copyright (c) 2017 Ming Yang
   3  * Copyright (c) 2019 Paul B Mahol
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in all
  13  * copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #include "libavutil/imgutils.h"
  25 #include "libavutil/opt.h"
  26 #include "libavutil/pixdesc.h"
  27 #include "avfilter.h"
  28 #include "formats.h"
  29 #include "internal.h"
  30 #include "video.h"
  31
  32 typedef struct BilateralContext {
  33     const AVClass *class;
  34
  35     float sigmaS;
  36     float sigmaR;
  37     int planes;
  38
  39     int nb_planes;
  40     int depth;
  41     int planewidth[4];
  42     int planeheight[4];
  43
  44     float range_table[65536];
  45
  46     float *img_out_f;
  47     float *img_temp;
  48     float *map_factor_a;
  49     float *map_factor_b;
  50     float *slice_factor_a;
  51     float *slice_factor_b;
  52     float *line_factor_a;
  53     float *line_factor_b;
  54 } BilateralContext;
  55
  56 #define OFFSET(x) offsetof(BilateralContext, x)
  57 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
  58
  59 static const AVOption bilateral_options[] = {
  60     { "sigmaS", "set spatial sigma",    OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0,  10, FLAGS },
  61     { "sigmaR", "set range sigma",      OFFSET(sigmaR), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0,   1, FLAGS },
  62     { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT,   {.i64=1},     0, 0xF, FLAGS },
  63     { NULL }
  64 };
  65
  66 AVFILTER_DEFINE_CLASS(bilateral);
  67
  68 static int query_formats(AVFilterContext *ctx)
  69 {
  70     static const enum AVPixelFormat pix_fmts[] = {
  71         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
  72         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
  73         AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
  74         AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
  75         AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
  76         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
  77         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
  78         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
  79         AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
  80         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
  81         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
  82         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  83         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  84         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
  85         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
  86         AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
  87         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
  88         AV_PIX_FMT_NONE
  89     };
  90
  91     return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
  92 }
  93
  94 static int config_input(AVFilterLink *inlink)
  95 {
  96     BilateralContext *s = inlink->dst->priv;
  97     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
  98     float inv_sigma_range;
  99
 100     s->depth = desc->comp[0].depth;
 101     inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1));
 102
 103     //compute a lookup table
 104     for (int i = 0; i < (1 << s->depth); i++)
 105         s->range_table[i] = expf(-i * inv_sigma_range);
 106
 107     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 108     s->planewidth[0] = s->planewidth[3] = inlink->w;
 109     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 110     s->planeheight[0] = s->planeheight[3] = inlink->h;
 111
 112     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
 113
 114     s->img_out_f = av_calloc(inlink->w * inlink->h, sizeof(float));
 115     s->img_temp = av_calloc(inlink->w * inlink->h, sizeof(float));
 116     s->map_factor_a = av_calloc(inlink->w * inlink->h, sizeof(float));
 117     s->map_factor_b = av_calloc(inlink->w * inlink->h, sizeof(float));
 118     s->slice_factor_a = av_calloc(inlink->w, sizeof(float));
 119     s->slice_factor_b = av_calloc(inlink->w, sizeof(float));
 120     s->line_factor_a = av_calloc(inlink->w, sizeof(float));
 121     s->line_factor_b = av_calloc(inlink->w, sizeof(float));
 122
 123     if (!s->img_out_f ||
 124         !s->img_temp ||
 125         !s->map_factor_a ||
 126         !s->map_factor_b ||
 127         !s->slice_factor_a ||
 128         !s->slice_factor_a ||
 129         !s->line_factor_a ||
 130         !s->line_factor_a)
 131         return AVERROR(ENOMEM);
 132
 133     return 0;
 134 }
 135
 136 #define BILATERAL(type, name)                                                           \
 137 static void bilateral_##name(BilateralContext *s, const uint8_t *ssrc, uint8_t *ddst,   \
 138                              float sigma_spatial, float sigma_range,                    \
 139                              int width, int height, int src_linesize, int dst_linesize) \
 140 {                                                                                       \
 141     type *dst = (type *)ddst;                                                           \
 142     const type *src = (const type *)ssrc;                                               \
 143     float *img_out_f = s->img_out_f, *img_temp = s->img_temp;                           \
 144     float *map_factor_a = s->map_factor_a, *map_factor_b = s->map_factor_b;             \
 145     float *slice_factor_a = s->slice_factor_a, *slice_factor_b = s->slice_factor_b;     \
 146     float *line_factor_a = s->line_factor_a, *line_factor_b = s->line_factor_b;         \
 147     float *range_table = s->range_table;                                                \
 148     float alpha = expf(-sqrtf(2.f) / (sigma_spatial * width));                          \
 149     float ypr, ycr, *ycy, *ypy, *xcy, fp, fc;                                           \
 150     float inv_alpha_ = 1 - alpha;                                                       \
 151     float *ycf, *ypf, *xcf, *in_factor;                                                 \
 152     const type *tcy, *tpy;                                                                \
 153     int h1;                                                                               \
 154                                                                                           \
 155     for (int y = 0; y < height; y++) {                                                    \
 156         float *temp_factor_x, *temp_x = &img_temp[y * width];                             \
 157         const type *in_x = &src[y * src_linesize];                                        \
 158         const type *texture_x = &src[y * src_linesize];                                   \
 159         type tpr;                                                                         \
 160                                                                                           \
 161         *temp_x++ = ypr = *in_x++;                                                        \
 162         tpr = *texture_x++;                                                               \
 163                                                                                           \
 164         temp_factor_x = &map_factor_a[y * width];                                         \
 165         *temp_factor_x++ = fp = 1;                                                        \
 166                                                                                           \
 167         for (int x = 1; x < width; x++) {                                                 \
 168             float weight, alpha_;                                                         \
 169             int range_dist;                                                               \
 170             type tcr = *texture_x++;                                                      \
 171             type dr = abs(tcr - tpr);                                                     \
 172                                                                                           \
 173             range_dist = dr;                                                              \
 174             weight = range_table[range_dist];                                             \
 175             alpha_ = weight*alpha;                                                        \
 176             *temp_x++ = ycr = inv_alpha_*(*in_x++) + alpha_*ypr;                          \
 177             tpr = tcr;                                                                    \
 178             ypr = ycr;                                                                    \
 179             *temp_factor_x++ = fc = inv_alpha_ + alpha_ * fp;                             \
 180             fp = fc;                                                                      \
 181         }                                                                                 \
 182         --temp_x; *temp_x = 0.5f*((*temp_x) + (*--in_x));                                 \
 183         tpr = *--texture_x;                                                               \
 184         ypr = *in_x;                                                                      \
 185                                                                                           \
 186         --temp_factor_x; *temp_factor_x = 0.5f*((*temp_factor_x) + 1);                    \
 187         fp = 1;                                                                           \
 188                                                                                           \
 189         for (int x = width - 2; x >= 0; x--) {                                            \
 190             type tcr = *--texture_x;                                                      \
 191             type dr = abs(tcr - tpr);                                                     \
 192             int range_dist = dr;                                                          \
 193             float weight = range_table[range_dist];                                       \
 194             float alpha_ = weight * alpha;                                                \
 195                                                                                           \
 196             ycr = inv_alpha_ * (*--in_x) + alpha_ * ypr;                                  \
 197             --temp_x; *temp_x = 0.5f*((*temp_x) + ycr);                                   \
 198             tpr = tcr;                                                                    \
 199             ypr = ycr;                                                                    \
 200                                                                                           \
 201             fc = inv_alpha_ + alpha_*fp;                                                  \
 202             --temp_factor_x;                                                              \
 203             *temp_factor_x = 0.5f*((*temp_factor_x) + fc);                                \
 204             fp = fc;                                                                      \
 205         }                                                                                 \
 206     }                                                                                     \
 207     memcpy(img_out_f, img_temp, sizeof(float) * width);                                   \
 208                                                                                           \
 209     alpha = expf(-sqrtf(2.f) / (sigma_spatial * height));                                 \
 210     inv_alpha_ = 1 - alpha;                                                               \
 211     in_factor = map_factor_a;                                                             \
 212     memcpy(map_factor_b, in_factor, sizeof(float) * width);                               \
 213     for (int y = 1; y < height; y++) {                                                    \
 214         tpy = &src[(y - 1) * src_linesize];                                               \
 215         tcy = &src[y * src_linesize];                                                     \
 216         xcy = &img_temp[y * width];                                                       \
 217         ypy = &img_out_f[(y - 1) * width];                                                \
 218         ycy = &img_out_f[y * width];                                                      \
 219                                                                                           \
 220         xcf = &in_factor[y * width];                                                      \
 221         ypf = &map_factor_b[(y - 1) * width];                                             \
 222         ycf = &map_factor_b[y * width];                                                   \
 223         for (int x = 0; x < width; x++) {                                                 \
 224             type dr = abs((*tcy++) - (*tpy++));                                           \
 225             int range_dist = dr;                                                          \
 226             float weight = range_table[range_dist];                                       \
 227             float alpha_ = weight*alpha;                                                  \
 228                                                                                           \
 229             *ycy++ = inv_alpha_*(*xcy++) + alpha_*(*ypy++);                               \
 230             *ycf++ = inv_alpha_*(*xcf++) + alpha_*(*ypf++);                               \
 231         }                                                                                 \
 232     }                                                                                     \
 233     h1 = height - 1;                                                                      \
 234     ycf = line_factor_a;                                                                  \
 235     ypf = line_factor_b;                                                                  \
 236     memcpy(ypf, &in_factor[h1 * width], sizeof(float) * width);                           \
 237     for (int x = 0; x < width; x++)                                                       \
 238         map_factor_b[h1 * width + x] = 0.5f*(map_factor_b[h1 * width + x] + ypf[x]);      \
 239                                                                                           \
 240     ycy = slice_factor_a;                                                                 \
 241     ypy = slice_factor_b;                                                                 \
 242     memcpy(ypy, &img_temp[h1 * width], sizeof(float) * width);                            \
 243     for (int x = 0, k = 0; x < width; x++) {                                              \
 244         int idx = h1 * width + x;                                                         \
 245         img_out_f[idx] = 0.5f*(img_out_f[idx] + ypy[k++]) / map_factor_b[h1 * width + x]; \
 246     }                                                                                     \
 247                                                                                           \
 248     for (int y = h1 - 1; y >= 0; y--) {                                                   \
 249         float *ycf_, *ypf_, *factor_;                                                     \
 250         float *ycy_, *ypy_, *out_;                                                        \
 251                                                                                           \
 252         tpy = &src[(y + 1) * src_linesize];                                               \
 253         tcy = &src[y * src_linesize];                                                     \
 254         xcy = &img_temp[y * width];                                                       \
 255         ycy_ = ycy;                                                                       \
 256         ypy_ = ypy;                                                                       \
 257         out_ = &img_out_f[y * width];                                                     \
 258                                                                                           \
 259         xcf = &in_factor[y * width];                                                      \
 260         ycf_ = ycf;                                                                       \
 261         ypf_ = ypf;                                                                       \
 262         factor_ = &map_factor_b[y * width];                                               \
 263         for (int x = 0; x < width; x++) {                                                 \
 264             type dr = abs((*tcy++) - (*tpy++));                                           \
 265             int range_dist = dr;                                                          \
 266             float weight = range_table[range_dist];                                       \
 267             float alpha_ = weight*alpha;                                                  \
 268             float ycc, fcc = inv_alpha_*(*xcf++) + alpha_*(*ypf_++);                      \
 269                                                                                           \
 270             *ycf_++ = fcc;                                                                \
 271             *factor_ = 0.5f * (*factor_ + fcc);                                           \
 272                                                                                           \
 273             ycc = inv_alpha_*(*xcy++) + alpha_*(*ypy_++);                                 \
 274             *ycy_++ = ycc;                                                                \
 275             *out_ = 0.5f * (*out_ + ycc) / (*factor_);                                    \
 276             out_++;                                                                       \
 277             factor_++;                                                                    \
 278         }                                                                                 \
 279                                                                                           \
 280         memcpy(ypy, ycy, sizeof(float) * width);                                          \
 281         memcpy(ypf, ycf, sizeof(float) * width);                                          \
 282     }                                                                                     \
 283                                                                                           \
 284     for (int i = 0; i < height; i++)                                                      \
 285         for (int j = 0; j < width; j++)                                                   \
 286             dst[j + i * dst_linesize] = img_out_f[i * width + j];                         \
 287 }
 288
 289 BILATERAL(uint8_t, byte)
 290 BILATERAL(uint16_t, word)
 291
 292 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 293 {
 294     AVFilterContext *ctx = inlink->dst;
 295     BilateralContext *s = ctx->priv;
 296     AVFilterLink *outlink = ctx->outputs[0];
 297     AVFrame *out;
 298
 299     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 300     if (!out) {
 301         av_frame_free(&in);
 302         return AVERROR(ENOMEM);
 303     }
 304     av_frame_copy_props(out, in);
 305
 306     for (int plane = 0; plane < s->nb_planes; plane++) {
 307         if (!(s->planes & (1 << plane))) {
 308             av_image_copy_plane(out->data[plane], out->linesize[plane],
 309                                 in->data[plane], in->linesize[plane],
 310                                 s->planewidth[plane] * ((s->depth + 7) / 8), s->planeheight[plane]);
 311             continue;
 312         }
 313
 314         if (s->depth <= 8)
 315            bilateral_byte(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
 316                       s->planewidth[plane], s->planeheight[plane],
 317                       in->linesize[plane], out->linesize[plane]);
 318         else
 319            bilateral_word(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
 320                       s->planewidth[plane], s->planeheight[plane],
 321                       in->linesize[plane] / 2, out->linesize[plane] / 2);
 322     }
 323
 324     av_frame_free(&in);
 325     return ff_filter_frame(outlink, out);
 326 }
 327
 328 static av_cold void uninit(AVFilterContext *ctx)
 329 {
 330     BilateralContext *s = ctx->priv;
 331
 332     av_freep(&s->img_out_f);
 333     av_freep(&s->img_temp);
 334     av_freep(&s->map_factor_a);
 335     av_freep(&s->map_factor_b);
 336     av_freep(&s->slice_factor_a);
 337     av_freep(&s->slice_factor_b);
 338     av_freep(&s->line_factor_a);
 339     av_freep(&s->line_factor_b);
 340 }
 341
 342 static const AVFilterPad bilateral_inputs[] = {
 343     {
 344         .name         = "default",
 345         .type         = AVMEDIA_TYPE_VIDEO,
 346         .config_props = config_input,
 347         .filter_frame = filter_frame,
 348     },
 349     { NULL }
 350 };
 351
 352 static const AVFilterPad bilateral_outputs[] = {
 353     {
 354         .name = "default",
 355         .type = AVMEDIA_TYPE_VIDEO,
 356     },
 357     { NULL }
 358 };
 359
 360 AVFilter ff_vf_bilateral = {
 361     .name          = "bilateral",
 362     .description   = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
 363     .priv_size     = sizeof(BilateralContext),
 364     .priv_class    = &bilateral_class,
 365     .uninit        = uninit,
 366     .query_formats = query_formats,
 367     .inputs        = bilateral_inputs,
 368     .outputs       = bilateral_outputs,
 369     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
 370 };