git.sesse.net Git - ffmpeg/blob - libavfilter/vf_chromashift.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/avstring.h"
  22 #include "libavutil/eval.h"
  23 #include "libavutil/imgutils.h"
  24 #include "libavutil/intreadwrite.h"
  25 #include "libavutil/opt.h"
  26 #include "libavutil/pixdesc.h"
  27
  28 #include "avfilter.h"
  29 #include "formats.h"
  30 #include "internal.h"
  31 #include "framesync.h"
  32 #include "video.h"
  33
  34 typedef struct ChromaShiftContext {
  35     const AVClass *class;
  36     int cbh, cbv;
  37     int crh, crv;
  38     int rh, rv;
  39     int gh, gv;
  40     int bh, bv;
  41     int ah, av;
  42     int edge;
  43
  44     int nb_planes;
  45     int depth;
  46     int height[4];
  47     int width[4];
  48     int linesize[4];
  49
  50     AVFrame *in;
  51
  52     int is_rgbashift;
  53     int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  54 } ChromaShiftContext;
  55
  56 static int query_formats(AVFilterContext *ctx)
  57 {
  58     static const enum AVPixelFormat yuv_pix_fmts[] = {
  59         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
  60         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
  61         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
  62         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
  63         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
  64         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
  65         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
  66         AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
  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_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  70         AV_PIX_FMT_NONE
  71     };
  72     static const enum AVPixelFormat rgb_pix_fmts[] = {
  73         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP9,
  74         AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
  75         AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
  76         AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
  77         AV_PIX_FMT_NONE
  78     };
  79     const enum AVPixelFormat *pix_fmts;
  80     AVFilterFormats *fmts_list;
  81
  82     if (!strcmp(ctx->filter->name, "rgbashift"))
  83         pix_fmts = rgb_pix_fmts;
  84     else
  85         pix_fmts = yuv_pix_fmts;
  86
  87     fmts_list = ff_make_format_list(pix_fmts);
  88     if (!fmts_list)
  89         return AVERROR(ENOMEM);
  90     return ff_set_common_formats(ctx, fmts_list);
  91 }
  92
  93 #define DEFINE_SMEAR(depth, type, div)                                                    \
  94 static int smear_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)  \
  95 {                                                                                         \
  96     ChromaShiftContext *s = ctx->priv;                                                    \
  97     AVFrame *in = s->in;                                                                  \
  98     AVFrame *out = arg;                                                                   \
  99     const int sulinesize = in->linesize[1] / div;                                         \
 100     const int svlinesize = in->linesize[2] / div;                                         \
 101     const int ulinesize = out->linesize[1] / div;                                         \
 102     const int vlinesize = out->linesize[2] / div;                                         \
 103     const int cbh = s->cbh;                                                               \
 104     const int cbv = s->cbv;                                                               \
 105     const int crh = s->crh;                                                               \
 106     const int crv = s->crv;                                                               \
 107     const int h = s->height[1];                                                           \
 108     const int w = s->width[1];                                                            \
 109     const int slice_start = (h * jobnr) / nb_jobs;                                        \
 110     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
 111     const type *su = (const type *)in->data[1];                                           \
 112     const type *sv = (const type *)in->data[2];                                           \
 113     type *du = (type *)out->data[1] + slice_start * ulinesize;                            \
 114     type *dv = (type *)out->data[2] + slice_start * vlinesize;                            \
 115                                                                                           \
 116     for (int y = slice_start; y < slice_end; y++) {                                       \
 117         const int duy = av_clip(y - cbv, 0, h-1) * sulinesize;                            \
 118         const int dvy = av_clip(y - crv, 0, h-1) * svlinesize;                            \
 119                                                                                           \
 120         for (int x = 0; x < w; x++) {                                                     \
 121             du[x] = su[av_clip(x - cbh, 0, w - 1) + duy];                                 \
 122             dv[x] = sv[av_clip(x - crh, 0, w - 1) + dvy];                                 \
 123         }                                                                                 \
 124                                                                                           \
 125         du += ulinesize;                                                                  \
 126         dv += vlinesize;                                                                  \
 127     }                                                                                     \
 128                                                                                           \
 129     return 0;                                                                             \
 130 }
 131
 132 DEFINE_SMEAR(8, uint8_t, 1)
 133 DEFINE_SMEAR(16, uint16_t, 2)
 134
 135 #define DEFINE_WRAP(depth, type, div)                                                     \
 136 static int wrap_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
 137 {                                                                                         \
 138     ChromaShiftContext *s = ctx->priv;                                                    \
 139     AVFrame *in = s->in;                                                                  \
 140     AVFrame *out = arg;                                                                   \
 141     const int sulinesize = in->linesize[1] / div;                                         \
 142     const int svlinesize = in->linesize[2] / div;                                         \
 143     const int ulinesize = out->linesize[1] / div;                                         \
 144     const int vlinesize = out->linesize[2] / div;                                         \
 145     const int cbh = s->cbh;                                                               \
 146     const int cbv = s->cbv;                                                               \
 147     const int crh = s->crh;                                                               \
 148     const int crv = s->crv;                                                               \
 149     const int h = s->height[1];                                                           \
 150     const int w = s->width[1];                                                            \
 151     const int slice_start = (h * jobnr) / nb_jobs;                                        \
 152     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
 153     const type *su = (const type *)in->data[1];                                           \
 154     const type *sv = (const type *)in->data[2];                                           \
 155     type *du = (type *)out->data[1] + slice_start * ulinesize;                            \
 156     type *dv = (type *)out->data[2] + slice_start * vlinesize;                            \
 157                                                                                           \
 158     for (int y = slice_start; y < slice_end; y++) {                                       \
 159         int uy = (y - cbv) % h;                                                           \
 160         int vy = (y - crv) % h;                                                           \
 161                                                                                           \
 162         if (uy < 0)                                                                       \
 163             uy += h;                                                                      \
 164         if (vy < 0)                                                                       \
 165             vy += h;                                                                      \
 166                                                                                           \
 167         for (int x = 0; x < w; x++) {                                                     \
 168             int ux = (x - cbh) % w;                                                       \
 169             int vx = (x - crh) % w;                                                       \
 170                                                                                           \
 171             if (ux < 0)                                                                   \
 172                 ux += w;                                                                  \
 173             if (vx < 0)                                                                   \
 174                 vx += w;                                                                  \
 175                                                                                           \
 176             du[x] = su[ux + uy * sulinesize];                                             \
 177             dv[x] = sv[vx + vy * svlinesize];                                             \
 178         }                                                                                 \
 179                                                                                           \
 180         du += ulinesize;                                                                  \
 181         dv += vlinesize;                                                                  \
 182     }                                                                                     \
 183                                                                                           \
 184     return 0;                                                                             \
 185 }
 186
 187 DEFINE_WRAP(8, uint8_t, 1)
 188 DEFINE_WRAP(16, uint16_t, 2)
 189
 190 #define DEFINE_RGBASMEAR(depth, type, div)                                                    \
 191 static int rgbasmear_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)  \
 192 {                                                                                         \
 193     ChromaShiftContext *s = ctx->priv;                                                    \
 194     AVFrame *in = s->in;                                                                  \
 195     AVFrame *out = arg;                                                                   \
 196     const int srlinesize = in->linesize[2] / div;                                         \
 197     const int sglinesize = in->linesize[0] / div;                                         \
 198     const int sblinesize = in->linesize[1] / div;                                         \
 199     const int salinesize = in->linesize[3] / div;                                         \
 200     const int rlinesize = out->linesize[2] / div;                                         \
 201     const int glinesize = out->linesize[0] / div;                                         \
 202     const int blinesize = out->linesize[1] / div;                                         \
 203     const int alinesize = out->linesize[3] / div;                                         \
 204     const int rh = s->rh;                                                                 \
 205     const int rv = s->rv;                                                                 \
 206     const int gh = s->gh;                                                                 \
 207     const int gv = s->gv;                                                                 \
 208     const int bh = s->bh;                                                                 \
 209     const int bv = s->bv;                                                                 \
 210     const int ah = s->ah;                                                                 \
 211     const int av = s->av;                                                                 \
 212     const int h = s->height[1];                                                           \
 213     const int w = s->width[1];                                                            \
 214     const int slice_start = (h * jobnr) / nb_jobs;                                        \
 215     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
 216     const type *sr = (const type *)in->data[2];                                           \
 217     const type *sg = (const type *)in->data[0];                                           \
 218     const type *sb = (const type *)in->data[1];                                           \
 219     const type *sa = (const type *)in->data[3];                                           \
 220     type *dr = (type *)out->data[2] + slice_start * rlinesize;                            \
 221     type *dg = (type *)out->data[0] + slice_start * glinesize;                            \
 222     type *db = (type *)out->data[1] + slice_start * blinesize;                            \
 223     type *da = (type *)out->data[3] + slice_start * alinesize;                            \
 224                                                                                           \
 225     for (int y = slice_start; y < slice_end; y++) {                                       \
 226         const int ry = av_clip(y - rv, 0, h-1) * srlinesize;                              \
 227         const int gy = av_clip(y - gv, 0, h-1) * sglinesize;                              \
 228         const int by = av_clip(y - bv, 0, h-1) * sblinesize;                              \
 229         int ay;                                                                           \
 230                                                                                           \
 231         for (int x = 0; x < w; x++) {                                                     \
 232             dr[x] = sr[av_clip(x - rh, 0, w - 1) + ry];                                   \
 233             dg[x] = sg[av_clip(x - gh, 0, w - 1) + gy];                                   \
 234             db[x] = sb[av_clip(x - bh, 0, w - 1) + by];                                   \
 235         }                                                                                 \
 236                                                                                           \
 237         dr += rlinesize;                                                                  \
 238         dg += glinesize;                                                                  \
 239         db += blinesize;                                                                  \
 240                                                                                           \
 241         if (s->nb_planes < 4)                                                             \
 242             continue;                                                                     \
 243         ay = av_clip(y - av, 0, h-1) * salinesize;                                        \
 244         for (int x = 0; x < w; x++) {                                                     \
 245             da[x] = sa[av_clip(x - ah, 0, w - 1) + ay];                                   \
 246         }                                                                                 \
 247                                                                                           \
 248         da += alinesize;                                                                  \
 249     }                                                                                     \
 250                                                                                           \
 251     return 0;                                                                             \
 252 }
 253
 254 DEFINE_RGBASMEAR(8, uint8_t, 1)
 255 DEFINE_RGBASMEAR(16, uint16_t, 2)
 256
 257 #define DEFINE_RGBAWRAP(depth, type, div)                                                     \
 258 static int rgbawrap_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
 259 {                                                                                         \
 260     ChromaShiftContext *s = ctx->priv;                                                    \
 261     AVFrame *in = s->in;                                                                  \
 262     AVFrame *out = arg;                                                                   \
 263     const int srlinesize = in->linesize[2] / div;                                         \
 264     const int sglinesize = in->linesize[0] / div;                                         \
 265     const int sblinesize = in->linesize[1] / div;                                         \
 266     const int salinesize = in->linesize[3] / div;                                         \
 267     const int rlinesize = out->linesize[2] / div;                                         \
 268     const int glinesize = out->linesize[0] / div;                                         \
 269     const int blinesize = out->linesize[1] / div;                                         \
 270     const int alinesize = out->linesize[3] / div;                                         \
 271     const int rh = s->rh;                                                                 \
 272     const int rv = s->rv;                                                                 \
 273     const int gh = s->gh;                                                                 \
 274     const int gv = s->gv;                                                                 \
 275     const int bh = s->bh;                                                                 \
 276     const int bv = s->bv;                                                                 \
 277     const int ah = s->ah;                                                                 \
 278     const int av = s->av;                                                                 \
 279     const int h = s->height[1];                                                           \
 280     const int w = s->width[1];                                                            \
 281     const int slice_start = (h * jobnr) / nb_jobs;                                        \
 282     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
 283     const type *sr = (const type *)in->data[2];                                           \
 284     const type *sg = (const type *)in->data[0];                                           \
 285     const type *sb = (const type *)in->data[1];                                           \
 286     const type *sa = (const type *)in->data[3];                                           \
 287     type *dr = (type *)out->data[2] + slice_start * rlinesize;                            \
 288     type *dg = (type *)out->data[0] + slice_start * glinesize;                            \
 289     type *db = (type *)out->data[1] + slice_start * blinesize;                            \
 290     type *da = (type *)out->data[3] + slice_start * alinesize;                            \
 291                                                                                           \
 292     for (int y = slice_start; y < slice_end; y++) {                                       \
 293         int ry = (y - rv) % h;                                                            \
 294         int gy = (y - gv) % h;                                                            \
 295         int by = (y - bv) % h;                                                            \
 296                                                                                           \
 297         if (ry < 0)                                                                       \
 298             ry += h;                                                                      \
 299         if (gy < 0)                                                                       \
 300             gy += h;                                                                      \
 301         if (by < 0)                                                                       \
 302             by += h;                                                                      \
 303                                                                                           \
 304         for (int x = 0; x < w; x++) {                                                     \
 305             int rx = (x - rh) % w;                                                        \
 306             int gx = (x - gh) % w;                                                        \
 307             int bx = (x - bh) % w;                                                        \
 308                                                                                           \
 309             if (rx < 0)                                                                   \
 310                 rx += w;                                                                  \
 311             if (gx < 0)                                                                   \
 312                 gx += w;                                                                  \
 313             if (bx < 0)                                                                   \
 314                 bx += w;                                                                  \
 315             dr[x] = sr[rx + ry * srlinesize];                                             \
 316             dg[x] = sg[gx + gy * sglinesize];                                             \
 317             db[x] = sb[bx + by * sblinesize];                                             \
 318         }                                                                                 \
 319                                                                                           \
 320         dr += rlinesize;                                                                  \
 321         dg += glinesize;                                                                  \
 322         db += blinesize;                                                                  \
 323                                                                                           \
 324         if (s->nb_planes < 4)                                                             \
 325             continue;                                                                     \
 326         for (int x = 0; x < w; x++) {                                                     \
 327             int ax = (x - ah) % w;                                                        \
 328             int ay = (x - av) % h;                                                        \
 329                                                                                           \
 330             if (ax < 0)                                                                   \
 331                 ax += w;                                                                  \
 332             if (ay < 0)                                                                   \
 333                 ay += h;                                                                  \
 334             da[x] = sa[ax + ay * salinesize];                                             \
 335         }                                                                                 \
 336                                                                                           \
 337         da += alinesize;                                                                  \
 338     }                                                                                     \
 339                                                                                           \
 340     return 0;                                                                             \
 341 }
 342
 343 DEFINE_RGBAWRAP(8, uint8_t, 1)
 344 DEFINE_RGBAWRAP(16, uint16_t, 2)
 345
 346 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 347 {
 348     AVFilterContext *ctx = inlink->dst;
 349     AVFilterLink *outlink = ctx->outputs[0];
 350     ChromaShiftContext *s = ctx->priv;
 351     AVFrame *out;
 352
 353     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 354     if (!out) {
 355         av_frame_free(&in);
 356         return AVERROR(ENOMEM);
 357     }
 358     av_frame_copy_props(out, in);
 359
 360     s->in = in;
 361     if (!s->is_rgbashift) {
 362         av_image_copy_plane(out->data[0],
 363                             out->linesize[0],
 364                             in->data[0], in->linesize[0],
 365                             s->linesize[0], s->height[0]);
 366     }
 367     ctx->internal->execute(ctx, s->filter_slice, out, NULL,
 368                            FFMIN3(s->height[1],
 369                                   s->height[2],
 370                                   ff_filter_get_nb_threads(ctx)));
 371     s->in = NULL;
 372     av_frame_free(&in);
 373     return ff_filter_frame(outlink, out);
 374 }
 375
 376 static int config_input(AVFilterLink *inlink)
 377 {
 378     AVFilterContext *ctx = inlink->dst;
 379     ChromaShiftContext *s = ctx->priv;
 380     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
 381
 382     s->is_rgbashift = !strcmp(ctx->filter->name, "rgbashift");
 383     s->depth = desc->comp[0].depth;
 384     s->nb_planes = desc->nb_components;
 385     if (s->is_rgbashift) {
 386         if (s->edge)
 387             s->filter_slice = s->depth > 8 ? rgbawrap_slice16 : rgbawrap_slice8;
 388         else
 389             s->filter_slice = s->depth > 8 ? rgbasmear_slice16 : rgbasmear_slice8;
 390     } else {
 391         if (s->edge)
 392             s->filter_slice = s->depth > 8 ? wrap_slice16 : wrap_slice8;
 393         else
 394             s->filter_slice = s->depth > 8 ? smear_slice16 : smear_slice8;
 395     }
 396     s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 397     s->height[0] = s->height[3] = inlink->h;
 398     s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 399     s->width[0] = s->width[3] = inlink->w;
 400
 401     return av_image_fill_linesizes(s->linesize, inlink->format, inlink->w);
 402 }
 403
 404 #define OFFSET(x) offsetof(ChromaShiftContext, x)
 405 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
 406
 407 static const AVOption chromashift_options[] = {
 408     { "cbh", "shift chroma-blue horizontally", OFFSET(cbh),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 409     { "cbv", "shift chroma-blue vertically",   OFFSET(cbv),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 410     { "crh", "shift chroma-red horizontally",  OFFSET(crh),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 411     { "crv", "shift chroma-red vertically",    OFFSET(crv),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 412     { "edge", "set edge operation",            OFFSET(edge), AV_OPT_TYPE_INT,   {.i64=0},    0,   1, .flags = VF, "edge" },
 413     { "smear",                              0,            0, AV_OPT_TYPE_CONST, {.i64=0},    0,   0, .flags = VF, "edge" },
 414     { "wrap",                               0,            0, AV_OPT_TYPE_CONST, {.i64=1},    0,   0, .flags = VF, "edge" },
 415     { NULL },
 416 };
 417
 418 static const AVFilterPad inputs[] = {
 419     {
 420         .name         = "default",
 421         .type         = AVMEDIA_TYPE_VIDEO,
 422         .filter_frame = filter_frame,
 423         .config_props = config_input,
 424     },
 425     { NULL }
 426 };
 427
 428 static const AVFilterPad outputs[] = {
 429     {
 430         .name = "default",
 431         .type = AVMEDIA_TYPE_VIDEO,
 432     },
 433     { NULL }
 434 };
 435
 436 AVFILTER_DEFINE_CLASS(chromashift);
 437
 438 AVFilter ff_vf_chromashift = {
 439     .name          = "chromashift",
 440     .description   = NULL_IF_CONFIG_SMALL("Shift chroma."),
 441     .priv_size     = sizeof(ChromaShiftContext),
 442     .priv_class    = &chromashift_class,
 443     .query_formats = query_formats,
 444     .outputs       = outputs,
 445     .inputs        = inputs,
 446     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 447 };
 448
 449 static const AVOption rgbashift_options[] = {
 450     { "rh", "shift red horizontally",   OFFSET(rh),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 451     { "rv", "shift red vertically",     OFFSET(rv),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 452     { "gh", "shift green horizontally", OFFSET(gh),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 453     { "gv", "shift green vertically",   OFFSET(gv),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 454     { "bh", "shift blue horizontally",  OFFSET(bh),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 455     { "bv", "shift blue vertically",    OFFSET(bv),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 456     { "ah", "shift alpha horizontally", OFFSET(ah),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 457     { "av", "shift alpha vertically",   OFFSET(av),   AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
 458     { "edge", "set edge operation",     OFFSET(edge), AV_OPT_TYPE_INT,   {.i64=0},    0,   1, .flags = VF, "edge" },
 459     { "smear",                          0,         0, AV_OPT_TYPE_CONST, {.i64=0},    0,   0, .flags = VF, "edge" },
 460     { "wrap",                           0,         0, AV_OPT_TYPE_CONST, {.i64=1},    0,   0, .flags = VF, "edge" },
 461     { NULL },
 462 };
 463
 464 AVFILTER_DEFINE_CLASS(rgbashift);
 465
 466 AVFilter ff_vf_rgbashift = {
 467     .name          = "rgbashift",
 468     .description   = NULL_IF_CONFIG_SMALL("Shift RGBA."),
 469     .priv_size     = sizeof(ChromaShiftContext),
 470     .priv_class    = &rgbashift_class,
 471     .query_formats = query_formats,
 472     .outputs       = outputs,
 473     .inputs        = inputs,
 474     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
 475 };