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

   1 /*
   2  * Copyright (c) 2018 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/imgutils.h"
  22 #include "libavutil/pixdesc.h"
  23 #include "libavutil/opt.h"
  24 #include "avfilter.h"
  25 #include "formats.h"
  26 #include "internal.h"
  27 #include "video.h"
  28
  29 typedef struct MaskFunContext {
  30     const AVClass *class;
  31
  32     int low, high;
  33     int planes;
  34     int fill;
  35     int sum;
  36
  37     int linesize[4];
  38     int width[4], height[4];
  39     int nb_planes;
  40     int depth;
  41     int max;
  42     uint64_t max_sum;
  43
  44     AVFrame *empty;
  45     int (*getsum)(AVFilterContext *ctx, AVFrame *out);
  46     int (*maskfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  47 } MaskFunContext;
  48
  49 #define OFFSET(x) offsetof(MaskFunContext, x)
  50 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
  51
  52 static const AVOption maskfun_options[] = {
  53     { "low",    "set low threshold",  OFFSET(low),    AV_OPT_TYPE_INT, {.i64=10},  0, UINT16_MAX, VF },
  54     { "high",   "set high threshold", OFFSET(high),   AV_OPT_TYPE_INT, {.i64=10},  0, UINT16_MAX, VF },
  55     { "planes", "set planes",         OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF,        VF },
  56     { "fill",   "set fill value",     OFFSET(fill),   AV_OPT_TYPE_INT, {.i64=0},   0, UINT16_MAX, VF },
  57     { "sum",    "set sum value",      OFFSET(sum),    AV_OPT_TYPE_INT, {.i64=10},  0, UINT16_MAX, VF },
  58     { NULL }
  59 };
  60
  61 AVFILTER_DEFINE_CLASS(maskfun);
  62
  63 static int query_formats(AVFilterContext *ctx)
  64 {
  65     static const enum AVPixelFormat pix_fmts[] = {
  66         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
  67         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
  68         AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
  69         AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
  70         AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
  71         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
  72         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
  73         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
  74         AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
  75         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
  76         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
  77         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  78         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  79         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
  80         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
  81         AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
  82         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
  83         AV_PIX_FMT_NONE
  84     };
  85
  86     return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
  87 }
  88
  89 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
  90 {
  91     AVFilterContext *ctx = inlink->dst;
  92     MaskFunContext *s = ctx->priv;
  93     AVFilterLink *outlink = ctx->outputs[0];
  94
  95     if (s->getsum(ctx, frame)) {
  96         AVFrame *out = av_frame_clone(s->empty);
  97
  98         if (!out) {
  99             av_frame_free(&frame);
 100             return AVERROR(ENOMEM);
 101         }
 102         out->pts = frame->pts;
 103         av_frame_free(&frame);
 104
 105         return ff_filter_frame(outlink, out);
 106     }
 107
 108     ctx->internal->execute(ctx, s->maskfun, frame, NULL,
 109                            FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
 110
 111     return ff_filter_frame(outlink, frame);
 112 }
 113
 114 #define GETSUM(name, type, div)                              \
 115 static int getsum##name(AVFilterContext *ctx, AVFrame *out)  \
 116 {                                                            \
 117     MaskFunContext *s = ctx->priv;                           \
 118     uint64_t sum = 0;                                        \
 119     int p;                                                   \
 120                                                              \
 121     for (p = 0; p < s->nb_planes; p++) {                     \
 122         const int linesize = out->linesize[p] / div;         \
 123         const int w = s->width[p];                           \
 124         const int h = s->height[p];                          \
 125         type *dst = (type *)out->data[p];                    \
 126                                                              \
 127         if (!((1 << p) & s->planes))                         \
 128             continue;                                        \
 129                                                              \
 130         for (int y = 0; y < h; y++) {                        \
 131             for (int x = 0; x < w; x++)                      \
 132                 sum += dst[x];                               \
 133             if (sum >= s->max_sum)                           \
 134                 return 1;                                    \
 135             dst += linesize;                                 \
 136         }                                                    \
 137     }                                                        \
 138                                                              \
 139     return 0;                                                \
 140 }
 141
 142 GETSUM(8, uint8_t, 1)
 143 GETSUM(16, uint16_t, 2)
 144
 145 #define MASKFUN(name, type, div)                             \
 146 static int maskfun##name(AVFilterContext *ctx, void *arg,    \
 147                          int jobnr, int nb_jobs)             \
 148 {                                                            \
 149     MaskFunContext *s = ctx->priv;                           \
 150     AVFrame *out = arg;                                      \
 151     const int low = s->low;                                  \
 152     const int high = s->high;                                \
 153     const int max = s->max;                                  \
 154     int p;                                                   \
 155                                                              \
 156     for (p = 0; p < s->nb_planes; p++) {                     \
 157         const int linesize = out->linesize[p] / div;         \
 158         const int w = s->width[p];                           \
 159         const int h = s->height[p];                          \
 160         const int slice_start = (h * jobnr) / nb_jobs;       \
 161         const int slice_end = (h * (jobnr+1)) / nb_jobs;     \
 162         type *dst = (type *)out->data[p] + slice_start * linesize; \
 163                                                              \
 164         if (!((1 << p) & s->planes))                         \
 165             continue;                                        \
 166                                                              \
 167         for (int y = slice_start; y < slice_end; y++) {      \
 168             for (int x = 0; x < w; x++) {                    \
 169                 if (dst[x] <= low)                           \
 170                     dst[x] = 0;                              \
 171                 else if (dst[x] > high)                      \
 172                     dst[x] = max;                            \
 173             }                                                \
 174                                                              \
 175             dst += linesize;                                 \
 176         }                                                    \
 177     }                                                        \
 178                                                              \
 179     return 0;                                                \
 180 }
 181
 182 MASKFUN(8, uint8_t, 1)
 183 MASKFUN(16, uint16_t, 2)
 184
 185 static int config_input(AVFilterLink *inlink)
 186 {
 187     AVFilterContext *ctx = inlink->dst;
 188     MaskFunContext *s = ctx->priv;
 189     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 190     int vsub, hsub, ret;
 191
 192     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
 193
 194     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
 195         return ret;
 196
 197     hsub = desc->log2_chroma_w;
 198     vsub = desc->log2_chroma_h;
 199     s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
 200     s->height[0] = s->height[3] = inlink->h;
 201     s->width[1]  = s->width[2]  = AV_CEIL_RSHIFT(inlink->w, hsub);
 202     s->width[0]  = s->width[3]  = inlink->w;
 203
 204     s->depth = desc->comp[0].depth;
 205     s->max = (1 << s->depth) - 1;
 206     s->fill = FFMIN(s->fill, s->max);
 207
 208     if (s->depth == 8) {
 209         s->maskfun = maskfun8;
 210         s->getsum = getsum8;
 211     } else {
 212         s->maskfun = maskfun16;
 213         s->getsum = getsum16;
 214     }
 215
 216     s->empty = ff_get_video_buffer(inlink, inlink->w, inlink->h);
 217     if (!s->empty)
 218         return AVERROR(ENOMEM);
 219
 220     if (s->depth == 8) {
 221         for (int p = 0; p < s->nb_planes; p++) {
 222             uint8_t *dst = s->empty->data[p];
 223
 224             for (int y = 0; y < s->height[p]; y++) {
 225                 memset(dst, s->fill, s->width[p]);
 226                 dst += s->empty->linesize[p];
 227             }
 228         }
 229     } else {
 230         for (int p = 0; p < s->nb_planes; p++) {
 231             uint16_t *dst = (uint16_t *)s->empty->data[p];
 232
 233             for (int y = 0; y < s->height[p]; y++) {
 234                 for (int x = 0; x < s->width[p]; x++)
 235                     dst[x] = s->fill;
 236                 dst += s->empty->linesize[p] / 2;
 237             }
 238         }
 239     }
 240
 241     s->max_sum = 0;
 242     for (int p = 0; p < s->nb_planes; p++) {
 243         if (!((1 << p) & s->planes))
 244             continue;
 245         s->max_sum += (uint64_t)s->sum * s->width[p] * s->height[p];
 246     }
 247
 248     return 0;
 249 }
 250
 251 static const AVFilterPad maskfun_inputs[] = {
 252     {
 253         .name           = "default",
 254         .type           = AVMEDIA_TYPE_VIDEO,
 255         .filter_frame   = filter_frame,
 256         .config_props   = config_input,
 257         .needs_writable = 1,
 258     },
 259     { NULL }
 260 };
 261
 262 static const AVFilterPad maskfun_outputs[] = {
 263     {
 264         .name = "default",
 265         .type = AVMEDIA_TYPE_VIDEO,
 266     },
 267     { NULL }
 268 };
 269
 270 AVFilter ff_vf_maskfun = {
 271     .name          = "maskfun",
 272     .description   = NULL_IF_CONFIG_SMALL("Create Mask."),
 273     .priv_size     = sizeof(MaskFunContext),
 274     .query_formats = query_formats,
 275     .inputs        = maskfun_inputs,
 276     .outputs       = maskfun_outputs,
 277     .priv_class    = &maskfun_class,
 278     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 279 };