libavfilter/vf_avgblur.c

   1 /*
   2  * Copyright (c) 2016 Paul B Mahol
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include "libavutil/imgutils.h"
  24 #include "libavutil/opt.h"
  25 #include "libavutil/pixdesc.h"
  26 #include "avfilter.h"
  27 #include "formats.h"
  28 #include "internal.h"
  29 #include "video.h"
  30
  31 typedef struct AverageBlurContext {
  32     const AVClass *class;
  33
  34     int radius;
  35     int radiusV;
  36     int planes;
  37
  38     int depth;
  39     int planewidth[4];
  40     int planeheight[4];
  41     float *buffer;
  42     int nb_planes;
  43
  44     int (*filter_horizontally)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  45     int (*filter_vertically)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  46 } AverageBlurContext;
  47
  48 #define OFFSET(x) offsetof(AverageBlurContext, x)
  49 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
  50
  51 static const AVOption avgblur_options[] = {
  52     { "sizeX",  "set horizontal size",  OFFSET(radius),  AV_OPT_TYPE_INT, {.i64=1},   1, 1024, FLAGS },
  53     { "planes", "set planes to filter", OFFSET(planes),  AV_OPT_TYPE_INT, {.i64=0xF}, 0,  0xF, FLAGS },
  54     { "sizeY",  "set vertical size",    OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0},   0, 1024, FLAGS },
  55     { NULL }
  56 };
  57
  58 AVFILTER_DEFINE_CLASS(avgblur);
  59
  60 typedef struct ThreadData {
  61     int height;
  62     int width;
  63     uint8_t *ptr;
  64     int linesize;
  65 } ThreadData;
  66
  67 #define HORIZONTAL_FILTER(name, type)                                                         \
  68 static int filter_horizontally_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)\
  69 {                                                                                             \
  70     AverageBlurContext *s = ctx->priv;                                                        \
  71     ThreadData *td = arg;                                                                     \
  72     const int height = td->height;                                                            \
  73     const int width = td->width;                                                              \
  74     const int slice_start = (height *  jobnr   ) / nb_jobs;                                   \
  75     const int slice_end   = (height * (jobnr+1)) / nb_jobs;                                   \
  76     const int radius = FFMIN(s->radius, width / 2);                                           \
  77     const int linesize = td->linesize / sizeof(type);                                         \
  78     float *buffer = s->buffer;                                                                \
  79     const type *src;                                                                          \
  80     float *ptr;                                                                               \
  81     int y, x;                                                                                 \
  82                                                                                               \
  83     /* Filter horizontally along each row */                                                  \
  84     for (y = slice_start; y < slice_end; y++) {                                               \
  85         float acc = 0;                                                                        \
  86         int count = 0;                                                                        \
  87                                                                                               \
  88         src = (const type *)td->ptr + linesize * y;                                           \
  89         ptr = buffer + width * y;                                                             \
  90                                                                                               \
  91         for (x = 0; x < radius; x++) {                                                        \
  92             acc += src[x];                                                                    \
  93         }                                                                                     \
  94         count += radius;                                                                      \
  95                                                                                               \
  96         for (x = 0; x <= radius; x++) {                                                       \
  97             acc += src[x + radius];                                                           \
  98             count++;                                                                          \
  99             ptr[x] = acc / count;                                                             \
 100         }                                                                                     \
 101                                                                                               \
 102         for (; x < width - radius; x++) {                                                     \
 103             acc += src[x + radius] - src[x - radius - 1];                                     \
 104             ptr[x] = acc / count;                                                             \
 105         }                                                                                     \
 106                                                                                               \
 107         for (; x < width; x++) {                                                              \
 108             acc -= src[x - radius];                                                           \
 109             count--;                                                                          \
 110             ptr[x] = acc / count;                                                             \
 111         }                                                                                     \
 112     }                                                                                         \
 113                                                                                               \
 114     return 0;                                                                                 \
 115 }
 116
 117 HORIZONTAL_FILTER(8, uint8_t)
 118 HORIZONTAL_FILTER(16, uint16_t)
 119
 120 #define VERTICAL_FILTER(name, type)                                                           \
 121 static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)  \
 122 {                                                                                             \
 123     AverageBlurContext *s = ctx->priv;                                                        \
 124     ThreadData *td = arg;                                                                     \
 125     const int height = td->height;                                                            \
 126     const int width = td->width;                                                              \
 127     const int slice_start = (width *  jobnr   ) / nb_jobs;                                    \
 128     const int slice_end   = (width * (jobnr+1)) / nb_jobs;                                    \
 129     const int radius = FFMIN(s->radiusV, height / 2);                                         \
 130     const int linesize = td->linesize / sizeof(type);                                         \
 131     type *buffer = (type *)td->ptr;                                                           \
 132     const float *src;                                                                         \
 133     type *ptr;                                                                                \
 134     int i, x;                                                                                 \
 135                                                                                               \
 136     /* Filter vertically along each column */                                                 \
 137     for (x = slice_start; x < slice_end; x++) {                                               \
 138         float acc = 0;                                                                        \
 139         int count = 0;                                                                        \
 140                                                                                               \
 141         ptr = buffer + x;                                                                     \
 142         src = s->buffer + x;                                                                  \
 143                                                                                               \
 144         for (i = 0; i < radius; i++) {                                                        \
 145             acc += src[0];                                                                    \
 146             src += width;                                                                     \
 147         }                                                                                     \
 148         count += radius;                                                                      \
 149                                                                                               \
 150         src = s->buffer + x;                                                                  \
 151         ptr = buffer + x;                                                                     \
 152         for (i = 0; i <= radius; i++) {                                                       \
 153             acc += src[(i + radius) * width];                                                 \
 154             count++;                                                                          \
 155             ptr[i * linesize] = acc / count;                                                  \
 156         }                                                                                     \
 157                                                                                               \
 158         for (; i < height - radius; i++) {                                                    \
 159             acc += src[(i + radius) * width] - src[(i - radius - 1) * width];                 \
 160             ptr[i * linesize] = acc / count;                                                  \
 161         }                                                                                     \
 162                                                                                               \
 163         for (; i < height; i++) {                                                             \
 164             acc -= src[(i - radius) * width];                                                 \
 165             count--;                                                                          \
 166             ptr[i * linesize] = acc / count;                                                  \
 167         }                                                                                     \
 168     }                                                                                         \
 169                                                                                               \
 170     return 0;                                                                                 \
 171 }
 172
 173 VERTICAL_FILTER(8, uint8_t)
 174 VERTICAL_FILTER(16, uint16_t)
 175
 176 static int config_input(AVFilterLink *inlink)
 177 {
 178     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 179     AverageBlurContext *s = inlink->dst->priv;
 180
 181     s->depth = desc->comp[0].depth;
 182     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 183     s->planewidth[0] = s->planewidth[3] = inlink->w;
 184     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 185     s->planeheight[0] = s->planeheight[3] = inlink->h;
 186
 187     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
 188
 189     s->buffer = av_malloc_array(inlink->w, inlink->h * sizeof(*s->buffer));
 190     if (!s->buffer)
 191         return AVERROR(ENOMEM);
 192
 193     if (s->radiusV <= 0) {
 194         s->radiusV = s->radius;
 195     }
 196
 197     if (s->depth == 8) {
 198         s->filter_horizontally = filter_horizontally_8;
 199         s->filter_vertically = filter_vertically_8;
 200     } else {
 201         s->filter_horizontally = filter_horizontally_16;
 202         s->filter_vertically = filter_vertically_16;
 203     }
 204
 205     return 0;
 206 }
 207
 208 static void averageiir2d(AVFilterContext *ctx, AVFrame *in, AVFrame *out, int plane)
 209 {
 210     AverageBlurContext *s = ctx->priv;
 211     const int width = s->planewidth[plane];
 212     const int height = s->planeheight[plane];
 213     const int nb_threads = ff_filter_get_nb_threads(ctx);
 214     ThreadData td;
 215
 216     td.width = width;
 217     td.height = height;
 218     td.ptr = in->data[plane];
 219     td.linesize = in->linesize[plane];
 220     ctx->internal->execute(ctx, s->filter_horizontally, &td, NULL, FFMIN(height, nb_threads));
 221     td.ptr = out->data[plane];
 222     td.linesize = out->linesize[plane];
 223     ctx->internal->execute(ctx, s->filter_vertically, &td, NULL, FFMIN(width, nb_threads));
 224 }
 225
 226 static int query_formats(AVFilterContext *ctx)
 227 {
 228     static const enum AVPixelFormat pix_fmts[] = {
 229         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
 230         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
 231         AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
 232         AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
 233         AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
 234         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
 235         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
 236         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
 237         AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
 238         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
 239         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
 240         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
 241         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
 242         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
 243         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
 244         AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
 245         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
 246         AV_PIX_FMT_NONE
 247     };
 248
 249     return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
 250 }
 251
 252 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 253 {
 254     AVFilterContext *ctx = inlink->dst;
 255     AverageBlurContext *s = ctx->priv;
 256     AVFilterLink *outlink = ctx->outputs[0];
 257     AVFrame *out;
 258     int plane;
 259
 260     if (av_frame_is_writable(in)) {
 261         out = in;
 262     } else {
 263         out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 264         if (!out) {
 265             av_frame_free(&in);
 266             return AVERROR(ENOMEM);
 267         }
 268         av_frame_copy_props(out, in);
 269     }
 270
 271     for (plane = 0; plane < s->nb_planes; plane++) {
 272         const int height = s->planeheight[plane];
 273         const int width = s->planewidth[plane];
 274
 275         if (!(s->planes & (1 << plane))) {
 276             if (out != in)
 277                 av_image_copy_plane(out->data[plane], out->linesize[plane],
 278                                     in->data[plane], in->linesize[plane],
 279                                     width * ((s->depth + 7) / 8), height);
 280             continue;
 281         }
 282
 283         averageiir2d(ctx, in, out, plane);
 284     }
 285
 286     if (out != in)
 287         av_frame_free(&in);
 288     return ff_filter_frame(outlink, out);
 289 }
 290
 291 static av_cold void uninit(AVFilterContext *ctx)
 292 {
 293     AverageBlurContext *s = ctx->priv;
 294
 295     av_freep(&s->buffer);
 296 }
 297
 298 static const AVFilterPad avgblur_inputs[] = {
 299     {
 300         .name         = "default",
 301         .type         = AVMEDIA_TYPE_VIDEO,
 302         .config_props = config_input,
 303         .filter_frame = filter_frame,
 304     },
 305     { NULL }
 306 };
 307
 308 static const AVFilterPad avgblur_outputs[] = {
 309     {
 310         .name = "default",
 311         .type = AVMEDIA_TYPE_VIDEO,
 312     },
 313     { NULL }
 314 };
 315
 316 AVFilter ff_vf_avgblur = {
 317     .name          = "avgblur",
 318     .description   = NULL_IF_CONFIG_SMALL("Apply Average Blur filter."),
 319     .priv_size     = sizeof(AverageBlurContext),
 320     .priv_class    = &avgblur_class,
 321     .uninit        = uninit,
 322     .query_formats = query_formats,
 323     .inputs        = avgblur_inputs,
 324     .outputs       = avgblur_outputs,
 325     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 326 };