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 alpha;
  45     float range_table[65536];
  46
  47     float *img_out_f;
  48     float *img_temp;
  49     float *map_factor_a;
  50     float *map_factor_b;
  51     float *slice_factor_a;
  52     float *slice_factor_b;
  53     float *line_factor_a;
  54     float *line_factor_b;
  55 } BilateralContext;
  56
  57 #define OFFSET(x) offsetof(BilateralContext, x)
  58 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
  59
  60 static const AVOption bilateral_options[] = {
  61     { "sigmaS", "set spatial sigma",    OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 512, FLAGS },
  62     { "sigmaR", "set range sigma",      OFFSET(sigmaR), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0,   1, FLAGS },
  63     { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT,   {.i64=1},     0, 0xF, FLAGS },
  64     { NULL }
  65 };
  66
  67 AVFILTER_DEFINE_CLASS(bilateral);
  68
  69 static int query_formats(AVFilterContext *ctx)
  70 {
  71     static const enum AVPixelFormat pix_fmts[] = {
  72         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
  73         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
  74         AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
  75         AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
  76         AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
  77         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
  78         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
  79         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
  80         AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
  81         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
  82         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
  83         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  84         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  85         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
  86         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
  87         AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
  88         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
  89         AV_PIX_FMT_NONE
  90     };
  91
  92     return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
  93 }
  94
  95 static int config_params(AVFilterContext *ctx)
  96 {
  97     BilateralContext *s = ctx->priv;
  98     float inv_sigma_range;
  99
 100     inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1));
 101     s->alpha = expf(-sqrtf(2.f) / s->sigmaS);
 102
 103     //compute a lookup table
 104     for (int i = 0; i < (1 << s->depth); i++)
 105         s->range_table[i] = s->alpha * expf(-i * inv_sigma_range);
 106
 107     return 0;
 108 }
 109
 110 static int config_input(AVFilterLink *inlink)
 111 {
 112     AVFilterContext *ctx = inlink->dst;
 113     BilateralContext *s = ctx->priv;
 114     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 115
 116     s->depth = desc->comp[0].depth;
 117
 118     config_params(ctx);
 119
 120     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 121     s->planewidth[0] = s->planewidth[3] = inlink->w;
 122     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 123     s->planeheight[0] = s->planeheight[3] = inlink->h;
 124
 125     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
 126
 127     s->img_out_f = av_calloc(inlink->w * inlink->h, sizeof(float));
 128     s->img_temp = av_calloc(inlink->w * inlink->h, sizeof(float));
 129     s->map_factor_a = av_calloc(inlink->w * inlink->h, sizeof(float));
 130     s->map_factor_b = av_calloc(inlink->w * inlink->h, sizeof(float));
 131     s->slice_factor_a = av_calloc(inlink->w, sizeof(float));
 132     s->slice_factor_b = av_calloc(inlink->w, sizeof(float));
 133     s->line_factor_a = av_calloc(inlink->w, sizeof(float));
 134     s->line_factor_b = av_calloc(inlink->w, sizeof(float));
 135
 136     if (!s->img_out_f ||
 137         !s->img_temp ||
 138         !s->map_factor_a ||
 139         !s->map_factor_b ||
 140         !s->slice_factor_a ||
 141         !s->slice_factor_a ||
 142         !s->line_factor_a ||
 143         !s->line_factor_a)
 144         return AVERROR(ENOMEM);
 145
 146     return 0;
 147 }
 148
 149 #define BILATERAL(type, name)                                                           \
 150 static void bilateral_##name(BilateralContext *s, const uint8_t *ssrc, uint8_t *ddst,   \
 151                              float sigma_spatial, float sigma_range,                    \
 152                              int width, int height, int src_linesize, int dst_linesize) \
 153 {                                                                                       \
 154     type *dst = (type *)ddst;                                                           \
 155     const type *src = (const type *)ssrc;                                               \
 156     float *img_out_f = s->img_out_f, *img_temp = s->img_temp;                           \
 157     float *map_factor_a = s->map_factor_a, *map_factor_b = s->map_factor_b;             \
 158     float *slice_factor_a = s->slice_factor_a, *slice_factor_b = s->slice_factor_b;     \
 159     float *line_factor_a = s->line_factor_a, *line_factor_b = s->line_factor_b;         \
 160     const float *range_table = s->range_table;                                          \
 161     const float alpha = s->alpha;                                                       \
 162     float ypr, ycr, *ycy, *ypy, *xcy, fp, fc;                                           \
 163     const float inv_alpha_ = 1.f - alpha;                                               \
 164     float *ycf, *ypf, *xcf, *in_factor;                                                 \
 165     const type *tcy, *tpy;                                                                \
 166     int h1;                                                                               \
 167                                                                                           \
 168     for (int y = 0; y < height; y++) {                                                    \
 169         float *temp_factor_x, *temp_x = &img_temp[y * width];                             \
 170         const type *in_x = &src[y * src_linesize];                                        \
 171         const type *texture_x = &src[y * src_linesize];                                   \
 172         type tpr;                                                                         \
 173                                                                                           \
 174         *temp_x++ = ypr = *in_x++;                                                        \
 175         tpr = *texture_x++;                                                               \
 176                                                                                           \
 177         temp_factor_x = &map_factor_a[y * width];                                         \
 178         *temp_factor_x++ = fp = 1;                                                        \
 179                                                                                           \
 180         for (int x = 1; x < width; x++) {                                                 \
 181             float alpha_;                                                                 \
 182             int range_dist;                                                               \
 183             type tcr = *texture_x++;                                                      \
 184             type dr = abs(tcr - tpr);                                                     \
 185                                                                                           \
 186             range_dist = dr;                                                              \
 187             alpha_ = range_table[range_dist];                                             \
 188             *temp_x++ = ycr = inv_alpha_*(*in_x++) + alpha_*ypr;                          \
 189             tpr = tcr;                                                                    \
 190             ypr = ycr;                                                                    \
 191             *temp_factor_x++ = fc = inv_alpha_ + alpha_ * fp;                             \
 192             fp = fc;                                                                      \
 193         }                                                                                 \
 194         --temp_x; *temp_x = 0.5f*((*temp_x) + (*--in_x));                                 \
 195         tpr = *--texture_x;                                                               \
 196         ypr = *in_x;                                                                      \
 197                                                                                           \
 198         --temp_factor_x; *temp_factor_x = 0.5f*((*temp_factor_x) + 1);                    \
 199         fp = 1;                                                                           \
 200                                                                                           \
 201         for (int x = width - 2; x >= 0; x--) {                                            \
 202             type tcr = *--texture_x;                                                      \
 203             type dr = abs(tcr - tpr);                                                     \
 204             int range_dist = dr;                                                          \
 205             float alpha_ = range_table[range_dist];                                       \
 206                                                                                           \
 207             ycr = inv_alpha_ * (*--in_x) + alpha_ * ypr;                                  \
 208             --temp_x; *temp_x = 0.5f*((*temp_x) + ycr);                                   \
 209             tpr = tcr;                                                                    \
 210             ypr = ycr;                                                                    \
 211                                                                                           \
 212             fc = inv_alpha_ + alpha_*fp;                                                  \
 213             --temp_factor_x;                                                              \
 214             *temp_factor_x = 0.5f*((*temp_factor_x) + fc);                                \
 215             fp = fc;                                                                      \
 216         }                                                                                 \
 217     }                                                                                     \
 218     memcpy(img_out_f, img_temp, sizeof(float) * width);                                   \
 219                                                                                           \
 220     in_factor = map_factor_a;                                                             \
 221     memcpy(map_factor_b, in_factor, sizeof(float) * width);                               \
 222     for (int y = 1; y < height; y++) {                                                    \
 223         tpy = &src[(y - 1) * src_linesize];                                               \
 224         tcy = &src[y * src_linesize];                                                     \
 225         xcy = &img_temp[y * width];                                                       \
 226         ypy = &img_out_f[(y - 1) * width];                                                \
 227         ycy = &img_out_f[y * width];                                                      \
 228                                                                                           \
 229         xcf = &in_factor[y * width];                                                      \
 230         ypf = &map_factor_b[(y - 1) * width];                                             \
 231         ycf = &map_factor_b[y * width];                                                   \
 232         for (int x = 0; x < width; x++) {                                                 \
 233             type dr = abs((*tcy++) - (*tpy++));                                           \
 234             int range_dist = dr;                                                          \
 235             float alpha_ = range_table[range_dist];                                       \
 236                                                                                           \
 237             *ycy++ = inv_alpha_*(*xcy++) + alpha_*(*ypy++);                               \
 238             *ycf++ = inv_alpha_*(*xcf++) + alpha_*(*ypf++);                               \
 239         }                                                                                 \
 240     }                                                                                     \
 241     h1 = height - 1;                                                                      \
 242     ycf = line_factor_a;                                                                  \
 243     ypf = line_factor_b;                                                                  \
 244     memcpy(ypf, &in_factor[h1 * width], sizeof(float) * width);                           \
 245     for (int x = 0; x < width; x++)                                                       \
 246         map_factor_b[h1 * width + x] = 0.5f*(map_factor_b[h1 * width + x] + ypf[x]);      \
 247                                                                                           \
 248     ycy = slice_factor_a;                                                                 \
 249     ypy = slice_factor_b;                                                                 \
 250     memcpy(ypy, &img_temp[h1 * width], sizeof(float) * width);                            \
 251     for (int x = 0, k = 0; x < width; x++) {                                              \
 252         int idx = h1 * width + x;                                                         \
 253         img_out_f[idx] = 0.5f*(img_out_f[idx] + ypy[k++]) / map_factor_b[h1 * width + x]; \
 254     }                                                                                     \
 255                                                                                           \
 256     for (int y = h1 - 1; y >= 0; y--) {                                                   \
 257         float *ycf_, *ypf_, *factor_;                                                     \
 258         float *ycy_, *ypy_, *out_;                                                        \
 259                                                                                           \
 260         tpy = &src[(y + 1) * src_linesize];                                               \
 261         tcy = &src[y * src_linesize];                                                     \
 262         xcy = &img_temp[y * width];                                                       \
 263         ycy_ = ycy;                                                                       \
 264         ypy_ = ypy;                                                                       \
 265         out_ = &img_out_f[y * width];                                                     \
 266                                                                                           \
 267         xcf = &in_factor[y * width];                                                      \
 268         ycf_ = ycf;                                                                       \
 269         ypf_ = ypf;                                                                       \
 270         factor_ = &map_factor_b[y * width];                                               \
 271         for (int x = 0; x < width; x++) {                                                 \
 272             type dr = abs((*tcy++) - (*tpy++));                                           \
 273             int range_dist = dr;                                                          \
 274             float alpha_ = range_table[range_dist];                                       \
 275             float ycc, fcc = inv_alpha_*(*xcf++) + alpha_*(*ypf_++);                      \
 276                                                                                           \
 277             *ycf_++ = fcc;                                                                \
 278             *factor_ = 0.5f * (*factor_ + fcc);                                           \
 279                                                                                           \
 280             ycc = inv_alpha_*(*xcy++) + alpha_*(*ypy_++);                                 \
 281             *ycy_++ = ycc;                                                                \
 282             *out_ = 0.5f * (*out_ + ycc) / (*factor_);                                    \
 283             out_++;                                                                       \
 284             factor_++;                                                                    \
 285         }                                                                                 \
 286                                                                                           \
 287         ypy = ycy;                                                                        \
 288         ypf = ycf;                                                                        \
 289     }                                                                                     \
 290                                                                                           \
 291     for (int i = 0; i < height; i++)                                                      \
 292         for (int j = 0; j < width; j++)                                                   \
 293             dst[j + i * dst_linesize] = img_out_f[i * width + j];                         \
 294 }
 295
 296 BILATERAL(uint8_t, byte)
 297 BILATERAL(uint16_t, word)
 298
 299 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 300 {
 301     AVFilterContext *ctx = inlink->dst;
 302     BilateralContext *s = ctx->priv;
 303     AVFilterLink *outlink = ctx->outputs[0];
 304     AVFrame *out;
 305
 306     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 307     if (!out) {
 308         av_frame_free(&in);
 309         return AVERROR(ENOMEM);
 310     }
 311     av_frame_copy_props(out, in);
 312
 313     for (int plane = 0; plane < s->nb_planes; plane++) {
 314         if (!(s->planes & (1 << plane))) {
 315             av_image_copy_plane(out->data[plane], out->linesize[plane],
 316                                 in->data[plane], in->linesize[plane],
 317                                 s->planewidth[plane] * ((s->depth + 7) / 8), s->planeheight[plane]);
 318             continue;
 319         }
 320
 321         if (s->depth <= 8)
 322            bilateral_byte(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
 323                       s->planewidth[plane], s->planeheight[plane],
 324                       in->linesize[plane], out->linesize[plane]);
 325         else
 326            bilateral_word(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
 327                       s->planewidth[plane], s->planeheight[plane],
 328                       in->linesize[plane] / 2, out->linesize[plane] / 2);
 329     }
 330
 331     av_frame_free(&in);
 332     return ff_filter_frame(outlink, out);
 333 }
 334
 335 static av_cold void uninit(AVFilterContext *ctx)
 336 {
 337     BilateralContext *s = ctx->priv;
 338
 339     av_freep(&s->img_out_f);
 340     av_freep(&s->img_temp);
 341     av_freep(&s->map_factor_a);
 342     av_freep(&s->map_factor_b);
 343     av_freep(&s->slice_factor_a);
 344     av_freep(&s->slice_factor_b);
 345     av_freep(&s->line_factor_a);
 346     av_freep(&s->line_factor_b);
 347 }
 348
 349 static int process_command(AVFilterContext *ctx,
 350                            const char *cmd,
 351                            const char *arg,
 352                            char *res,
 353                            int res_len,
 354                            int flags)
 355 {
 356     int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
 357
 358     if (ret < 0)
 359         return ret;
 360
 361     return config_params(ctx);
 362 }
 363
 364 static const AVFilterPad bilateral_inputs[] = {
 365     {
 366         .name         = "default",
 367         .type         = AVMEDIA_TYPE_VIDEO,
 368         .config_props = config_input,
 369         .filter_frame = filter_frame,
 370     },
 371     { NULL }
 372 };
 373
 374 static const AVFilterPad bilateral_outputs[] = {
 375     {
 376         .name = "default",
 377         .type = AVMEDIA_TYPE_VIDEO,
 378     },
 379     { NULL }
 380 };
 381
 382 const AVFilter ff_vf_bilateral = {
 383     .name          = "bilateral",
 384     .description   = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
 385     .priv_size     = sizeof(BilateralContext),
 386     .priv_class    = &bilateral_class,
 387     .uninit        = uninit,
 388     .query_formats = query_formats,
 389     .inputs        = bilateral_inputs,
 390     .outputs       = bilateral_outputs,
 391     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
 392     .process_command = process_command,
 393 };