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| 1 | +/* |
| 2 | + * Copyright (c) 2021 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/opt.h" |
| 23 | +#include "libavutil/pixdesc.h" |
| 24 | +#include "avfilter.h" |
| 25 | +#include "formats.h" |
| 26 | +#include "framesync.h" |
| 27 | +#include "internal.h" |
| 28 | +#include "video.h" |
| 29 | + |
| 30 | +typedef struct VarBlurContext { |
| 31 | + const AVClass *class; |
| 32 | + FFFrameSync fs; |
| 33 | + |
| 34 | + int min_radius; |
| 35 | + int max_radius; |
| 36 | + int planes; |
| 37 | + |
| 38 | + int depth; |
| 39 | + int planewidth[4]; |
| 40 | + int planeheight[4]; |
| 41 | + |
| 42 | + AVFrame *sat; |
| 43 | + int nb_planes; |
| 44 | + |
| 45 | + void (*compute_sat)(const uint8_t *ssrc, |
| 46 | + int linesize, |
| 47 | + int w, int h, |
| 48 | + const uint8_t *dstp, |
| 49 | + int dst_linesize); |
| 50 | + |
| 51 | + int (*blur_plane)(AVFilterContext *ctx, |
| 52 | + uint8_t *ddst, |
| 53 | + int ddst_linesize, |
| 54 | + const uint8_t *rrptr, |
| 55 | + int rrptr_linesize, |
| 56 | + int w, int h, |
| 57 | + const uint8_t *pptr, |
| 58 | + int pptr_linesize, |
| 59 | + int slice_start, int slice_end); |
| 60 | +} VarBlurContext; |
| 61 | + |
| 62 | +#define OFFSET(x) offsetof(VarBlurContext, x) |
| 63 | +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| 64 | + |
| 65 | +static const AVOption varblur_options[] = { |
| 66 | + { "min_r", "set min blur radius", OFFSET(min_radius), AV_OPT_TYPE_INT, {.i64=0}, 0, 254, FLAGS }, |
| 67 | + { "max_r", "set max blur radius", OFFSET(max_radius), AV_OPT_TYPE_INT, {.i64=8}, 1, 255, FLAGS }, |
| 68 | + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS }, |
| 69 | + { NULL } |
| 70 | +}; |
| 71 | + |
| 72 | +FRAMESYNC_DEFINE_CLASS(varblur, VarBlurContext, fs); |
| 73 | + |
| 74 | +static const enum AVPixelFormat pix_fmts[] = { |
| 75 | + AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| 76 | + AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| 77 | + AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| 78 | + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| 79 | + AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| 80 | + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
| 81 | + AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
| 82 | + AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, |
| 83 | + AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, |
| 84 | + AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| 85 | + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| 86 | + AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| 87 | + AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
| 88 | + AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| 89 | + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| 90 | + AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| 91 | + AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| 92 | + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| 93 | + AV_PIX_FMT_NONE |
| 94 | +}; |
| 95 | + |
| 96 | +#define COMPUTE_SAT(type, stype, depth) \ |
| 97 | +static void compute_sat##depth(const uint8_t *ssrc, \ |
| 98 | + int linesize, \ |
| 99 | + int w, int h, \ |
| 100 | + const uint8_t *dstp, \ |
| 101 | + int dst_linesize) \ |
| 102 | +{ \ |
| 103 | + const type *src = (const type *)ssrc; \ |
| 104 | + stype *dst = (stype *)dstp; \ |
| 105 | + \ |
| 106 | + linesize /= (depth / 8); \ |
| 107 | + dst_linesize /= (depth / 2); \ |
| 108 | + dst += dst_linesize; \ |
| 109 | + \ |
| 110 | + for (int y = 0; y < h; y++) { \ |
| 111 | + stype sum = 0; \ |
| 112 | + \ |
| 113 | + for (int x = 1; x < w; x++) { \ |
| 114 | + sum += src[x - 1]; \ |
| 115 | + dst[x] = sum + dst[x - dst_linesize]; \ |
| 116 | + } \ |
| 117 | + \ |
| 118 | + src += linesize; \ |
| 119 | + dst += dst_linesize; \ |
| 120 | + } \ |
| 121 | +} |
| 122 | + |
| 123 | +COMPUTE_SAT(uint8_t, uint32_t, 8) |
| 124 | +COMPUTE_SAT(uint16_t, uint64_t, 16) |
| 125 | + |
| 126 | +typedef struct ThreadData { |
| 127 | + AVFrame *in, *out, *radius; |
| 128 | +} ThreadData; |
| 129 | + |
| 130 | +static float lerpf(float v0, float v1, float f) |
| 131 | +{ |
| 132 | + return v0 + (v1 - v0) * f; |
| 133 | +} |
| 134 | + |
| 135 | +#define BLUR_PLANE(type, stype, bits) \ |
| 136 | +static int blur_plane##bits(AVFilterContext *ctx, \ |
| 137 | + uint8_t *ddst, \ |
| 138 | + int ddst_linesize, \ |
| 139 | + const uint8_t *rrptr, \ |
| 140 | + int rrptr_linesize, \ |
| 141 | + int w, int h, \ |
| 142 | + const uint8_t *pptr, \ |
| 143 | + int pptr_linesize, \ |
| 144 | + int slice_start, int slice_end) \ |
| 145 | +{ \ |
| 146 | + VarBlurContext *s = ctx->priv; \ |
| 147 | + const int ddepth = s->depth; \ |
| 148 | + const int dst_linesize = ddst_linesize / (bits / 8); \ |
| 149 | + const int ptr_linesize = pptr_linesize / (bits / 2); \ |
| 150 | + const int rptr_linesize = rrptr_linesize / (bits / 8); \ |
| 151 | + const type *rptr = (const type *)rrptr + slice_start * rptr_linesize; \ |
| 152 | + type *dst = (type *)ddst + slice_start * dst_linesize; \ |
| 153 | + const stype *ptr = (stype *)pptr; \ |
| 154 | + const float minr = 2.f * s->min_radius + 1.f; \ |
| 155 | + const float maxr = 2.f * s->max_radius + 1.f; \ |
| 156 | + const float scaler = (maxr - minr) / ((1 << ddepth) - 1); \ |
| 157 | + \ |
| 158 | + for (int y = slice_start; y < slice_end; y++) { \ |
| 159 | + for (int x = 0; x < w; x++) { \ |
| 160 | + const float radiusf = minr + (FFMAX(0.f, 2 * rptr[x] + 1 - minr)) * scaler; \ |
| 161 | + const int radius = floorf(radiusf); \ |
| 162 | + const float factor = radiusf - radius; \ |
| 163 | + const int nradius = radius + 1; \ |
| 164 | + const int l = FFMIN(radius, x); \ |
| 165 | + const int r = FFMIN(radius, w - x - 1); \ |
| 166 | + const int t = FFMIN(radius, y); \ |
| 167 | + const int b = FFMIN(radius, h - y - 1); \ |
| 168 | + const int nl = FFMIN(nradius, x); \ |
| 169 | + const int nr = FFMIN(nradius, w - x - 1); \ |
| 170 | + const int nt = FFMIN(nradius, y); \ |
| 171 | + const int nb = FFMIN(nradius, h - y - 1); \ |
| 172 | + stype tl = ptr[(y - t) * ptr_linesize + x - l]; \ |
| 173 | + stype tr = ptr[(y - t) * ptr_linesize + x + r]; \ |
| 174 | + stype bl = ptr[(y + b) * ptr_linesize + x - l]; \ |
| 175 | + stype br = ptr[(y + b) * ptr_linesize + x + r]; \ |
| 176 | + stype ntl = ptr[(y - nt) * ptr_linesize + x - nl]; \ |
| 177 | + stype ntr = ptr[(y - nt) * ptr_linesize + x + nr]; \ |
| 178 | + stype nbl = ptr[(y + nb) * ptr_linesize + x - nl]; \ |
| 179 | + stype nbr = ptr[(y + nb) * ptr_linesize + x + nr]; \ |
| 180 | + stype div = (l + r) * (t + b); \ |
| 181 | + stype ndiv = (nl + nr) * (nt + nb); \ |
| 182 | + stype p0 = (br + tl - bl - tr) / div; \ |
| 183 | + stype n0 = (nbr + ntl - nbl - ntr) / ndiv; \ |
| 184 | + \ |
| 185 | + dst[x] = av_clip_uintp2_c(lrintf( \ |
| 186 | + lerpf(p0, n0, factor)), \ |
| 187 | + ddepth); \ |
| 188 | + } \ |
| 189 | + \ |
| 190 | + rptr += rptr_linesize; \ |
| 191 | + dst += dst_linesize; \ |
| 192 | + } \ |
| 193 | + \ |
| 194 | + return 0; \ |
| 195 | +} |
| 196 | + |
| 197 | +BLUR_PLANE(uint8_t, uint32_t, 8) |
| 198 | +BLUR_PLANE(uint16_t, uint64_t, 16) |
| 199 | + |
| 200 | +static int blur_planes(AVFilterContext *ctx, void *arg, |
| 201 | + int jobnr, int nb_jobs) |
| 202 | +{ |
| 203 | + VarBlurContext *s = ctx->priv; |
| 204 | + ThreadData *td = arg; |
| 205 | + AVFrame *radius = td->radius; |
| 206 | + AVFrame *out = td->out; |
| 207 | + AVFrame *in = td->in; |
| 208 | + |
| 209 | + for (int plane = 0; plane < s->nb_planes; plane++) { |
| 210 | + const int height = s->planeheight[plane]; |
| 211 | + const int slice_start = (height * jobnr) / nb_jobs; |
| 212 | + const int slice_end = (height * (jobnr+1)) / nb_jobs; |
| 213 | + const int width = s->planewidth[plane]; |
| 214 | + const int linesize = in->linesize[plane]; |
| 215 | + const int dst_linesize = out->linesize[plane]; |
| 216 | + const uint8_t *rptr = radius->data[plane]; |
| 217 | + const int rptr_linesize = radius->linesize[plane]; |
| 218 | + uint8_t *ptr = s->sat->data[plane]; |
| 219 | + const int ptr_linesize = s->sat->linesize[plane]; |
| 220 | + const uint8_t *src = in->data[plane]; |
| 221 | + uint8_t *dst = out->data[plane]; |
| 222 | + |
| 223 | + if (!(s->planes & (1 << plane))) { |
| 224 | + if (out != in) |
| 225 | + av_image_copy_plane(dst + slice_start * dst_linesize, |
| 226 | + dst_linesize, |
| 227 | + src + slice_start * linesize, |
| 228 | + linesize, |
| 229 | + width * ((s->depth + 7) / 8), |
| 230 | + slice_end - slice_start); |
| 231 | + continue; |
| 232 | + } |
| 233 | + |
| 234 | + s->blur_plane(ctx, dst, dst_linesize, |
| 235 | + rptr, rptr_linesize, |
| 236 | + width, height, |
| 237 | + ptr, ptr_linesize, |
| 238 | + slice_start, slice_end); |
| 239 | + } |
| 240 | + |
| 241 | + return 0; |
| 242 | +} |
| 243 | + |
| 244 | +static int blur_frame(AVFilterContext *ctx, AVFrame *in, AVFrame *radius) |
| 245 | +{ |
| 246 | + VarBlurContext *s = ctx->priv; |
| 247 | + AVFilterLink *outlink = ctx->outputs[0]; |
| 248 | + ThreadData td; |
| 249 | + AVFrame *out; |
| 250 | + |
| 251 | + if (av_frame_is_writable(in)) { |
| 252 | + out = in; |
| 253 | + } else { |
| 254 | + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| 255 | + if (!out) { |
| 256 | + av_frame_free(&in); |
| 257 | + return AVERROR(ENOMEM); |
| 258 | + } |
| 259 | + av_frame_copy_props(out, in); |
| 260 | + } |
| 261 | + |
| 262 | + for (int plane = 0; plane < s->nb_planes; plane++) { |
| 263 | + const int height = s->planeheight[plane]; |
| 264 | + const int width = s->planewidth[plane]; |
| 265 | + const int linesize = in->linesize[plane]; |
| 266 | + uint8_t *ptr = s->sat->data[plane]; |
| 267 | + const int ptr_linesize = s->sat->linesize[plane]; |
| 268 | + const uint8_t *src = in->data[plane]; |
| 269 | + |
| 270 | + if (!(s->planes & (1 << plane))) |
| 271 | + continue; |
| 272 | + |
| 273 | + s->compute_sat(src, linesize, width, height, ptr, ptr_linesize); |
| 274 | + } |
| 275 | + |
| 276 | + td.in = in; |
| 277 | + td.out = out; |
| 278 | + td.radius = radius; |
| 279 | + ff_filter_execute(ctx, blur_planes, &td, NULL, |
| 280 | + FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx))); |
| 281 | + |
| 282 | + if (out != in) |
| 283 | + av_frame_free(&in); |
| 284 | + return ff_filter_frame(outlink, out); |
| 285 | +} |
| 286 | + |
| 287 | +static int activate(AVFilterContext *ctx) |
| 288 | +{ |
| 289 | + VarBlurContext *s = ctx->priv; |
| 290 | + return ff_framesync_activate(&s->fs); |
| 291 | +} |
| 292 | + |
| 293 | +static int varblur_frame(FFFrameSync *fs) |
| 294 | +{ |
| 295 | + AVFilterContext *ctx = fs->parent; |
| 296 | + VarBlurContext *s = ctx->priv; |
| 297 | + AVFrame *in, *radius; |
| 298 | + int ret; |
| 299 | + |
| 300 | + if (s->max_radius <= s->min_radius) |
| 301 | + s->max_radius = s->min_radius + 1; |
| 302 | + |
| 303 | + ret = ff_framesync_dualinput_get(fs, &in, &radius); |
| 304 | + if (ret < 0) |
| 305 | + return ret; |
| 306 | + if (!radius) |
| 307 | + return ff_filter_frame(ctx->outputs[0], in); |
| 308 | + return blur_frame(ctx, in, radius); |
| 309 | +} |
| 310 | + |
| 311 | +static int config_output(AVFilterLink *outlink) |
| 312 | +{ |
| 313 | + AVFilterContext *ctx = outlink->src; |
| 314 | + AVFilterLink *inlink = ctx->inputs[0]; |
| 315 | + AVFilterLink *radiuslink = ctx->inputs[1]; |
| 316 | + VarBlurContext *s = ctx->priv; |
| 317 | + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
| 318 | + int ret; |
| 319 | + |
| 320 | + if (inlink->w != radiuslink->w || inlink->h != radiuslink->h) { |
| 321 | + av_log(ctx, AV_LOG_ERROR, "First input link %s parameters " |
| 322 | + "(size %dx%d) do not match the corresponding " |
| 323 | + "second input link %s parameters (size %dx%d)\n", |
| 324 | + ctx->input_pads[0].name, inlink->w, inlink->h, |
| 325 | + ctx->input_pads[1].name, radiuslink->w, radiuslink->h); |
| 326 | + return AVERROR(EINVAL); |
| 327 | + } |
| 328 | + |
| 329 | + outlink->w = inlink->w; |
| 330 | + outlink->h = inlink->h; |
| 331 | + outlink->time_base = inlink->time_base; |
| 332 | + outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
| 333 | + outlink->frame_rate = inlink->frame_rate; |
| 334 | + |
| 335 | + s->depth = desc->comp[0].depth; |
| 336 | + s->blur_plane = s->depth <= 8 ? blur_plane8 : blur_plane16; |
| 337 | + s->compute_sat = s->depth <= 8 ? compute_sat8 : compute_sat16; |
| 338 | + |
| 339 | + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(outlink->w, desc->log2_chroma_w); |
| 340 | + s->planewidth[0] = s->planewidth[3] = outlink->w; |
| 341 | + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h); |
| 342 | + s->planeheight[0] = s->planeheight[3] = outlink->h; |
| 343 | + |
| 344 | + s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
| 345 | + |
| 346 | + s->sat = ff_get_video_buffer(outlink, (outlink->w + 1) * 4 * ((s->depth + 7) / 8), outlink->h + 1); |
| 347 | + if (!s->sat) |
| 348 | + return AVERROR(ENOMEM); |
| 349 | + |
| 350 | + s->fs.on_event = varblur_frame; |
| 351 | + if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0) |
| 352 | + return ret; |
| 353 | + |
| 354 | + ret = ff_framesync_configure(&s->fs); |
| 355 | + outlink->time_base = s->fs.time_base; |
| 356 | + |
| 357 | + return ret; |
| 358 | +} |
| 359 | + |
| 360 | +static av_cold void uninit(AVFilterContext *ctx) |
| 361 | +{ |
| 362 | + VarBlurContext *s = ctx->priv; |
| 363 | + |
| 364 | + ff_framesync_uninit(&s->fs); |
| 365 | + av_frame_free(&s->sat); |
| 366 | +} |
| 367 | + |
| 368 | +static const AVFilterPad varblur_inputs[] = { |
| 369 | + { |
| 370 | + .name = "default", |
| 371 | + .type = AVMEDIA_TYPE_VIDEO, |
| 372 | + }, |
| 373 | + { |
| 374 | + .name = "radius", |
| 375 | + .type = AVMEDIA_TYPE_VIDEO, |
| 376 | + }, |
| 377 | +}; |
| 378 | + |
| 379 | +static const AVFilterPad varblur_outputs[] = { |
| 380 | + { |
| 381 | + .name = "default", |
| 382 | + .type = AVMEDIA_TYPE_VIDEO, |
| 383 | + .config_props = config_output, |
| 384 | + }, |
| 385 | +}; |
| 386 | + |
| 387 | +const AVFilter ff_vf_varblur = { |
| 388 | + .name = "varblur", |
| 389 | + .description = NULL_IF_CONFIG_SMALL("Apply Variable Blur filter."), |
| 390 | + .priv_size = sizeof(VarBlurContext), |
| 391 | + .priv_class = &varblur_class, |
| 392 | + .activate = activate, |
| 393 | + .preinit = varblur_framesync_preinit, |
| 394 | + .uninit = uninit, |
| 395 | + FILTER_INPUTS(varblur_inputs), |
| 396 | + FILTER_OUTPUTS(varblur_outputs), |
| 397 | + FILTER_PIXFMTS_ARRAY(pix_fmts), |
| 398 | + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
| 399 | + AVFILTER_FLAG_SLICE_THREADS, |
| 400 | + .process_command = ff_filter_process_command, |
| 401 | +}; |