2 * Copyright (c) 2021 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
25 #include "framesync.h"
29 typedef struct VarBlurContext {
45 void (*compute_sat)(const uint8_t *ssrc,
51 int (*blur_plane)(AVFilterContext *ctx,
59 int slice_start, int slice_end);
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
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 },
72 FRAMESYNC_DEFINE_CLASS(varblur, VarBlurContext, fs);
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_GBRPF32, AV_PIX_FMT_GBRAPF32,
97 #define COMPUTE_SAT(type, stype, depth) \
98 static void compute_sat##depth(const uint8_t *ssrc, \
104 const type *src = (const type *)ssrc; \
105 stype *dst = (stype *)dstp; \
107 linesize /= (depth / 8); \
108 dst_linesize /= sizeof(stype); \
109 dst += dst_linesize; \
111 for (int y = 0; y < h; y++) { \
114 for (int x = 1; x < w; x++) { \
116 dst[x] = sum + dst[x - dst_linesize]; \
120 dst += dst_linesize; \
124 COMPUTE_SAT(uint8_t, uint32_t, 8)
125 COMPUTE_SAT(uint16_t, uint64_t, 16)
126 COMPUTE_SAT(float, double, 32)
128 typedef struct ThreadData {
129 AVFrame *in, *out, *radius;
132 static float lerpf(float v0, float v1, float f)
134 return v0 + (v1 - v0) * f;
137 #define BLUR_PLANE(type, stype, bits) \
138 static int blur_plane##bits(AVFilterContext *ctx, \
141 const uint8_t *rrptr, \
142 int rrptr_linesize, \
144 const uint8_t *pptr, \
146 int slice_start, int slice_end) \
148 VarBlurContext *s = ctx->priv; \
149 const int ddepth = (bits == 32) ? 1 : s->depth; \
150 const int dst_linesize = ddst_linesize / (bits / 8); \
151 const int ptr_linesize = pptr_linesize / sizeof(stype); \
152 const int rptr_linesize = rrptr_linesize / (bits / 8); \
153 const type *rptr = ((const type *)rrptr) + slice_start * rptr_linesize; \
154 type *dst = ((type *)ddst) + slice_start * dst_linesize; \
155 const stype *ptr = (stype *)pptr; \
156 const float minr = 2.f * s->min_radius + 1.f; \
157 const float maxr = 2.f * s->max_radius + 1.f; \
158 const float scaler = (maxr - minr) / ((1 << ddepth) - 1); \
160 for (int y = slice_start; y < slice_end; y++) { \
161 for (int x = 0; x < w; x++) { \
162 const float radiusf = minr + (FFMAX(0.f, 2 * rptr[x] + 1 - minr)) * scaler; \
163 const int radius = floorf(radiusf); \
164 const float factor = radiusf - radius; \
165 const int nradius = radius + 1; \
166 const int l = FFMIN(radius, x); \
167 const int r = FFMIN(radius, w - x - 1); \
168 const int t = FFMIN(radius, y); \
169 const int b = FFMIN(radius, h - y - 1); \
170 const int nl = FFMIN(nradius, x); \
171 const int nr = FFMIN(nradius, w - x - 1); \
172 const int nt = FFMIN(nradius, y); \
173 const int nb = FFMIN(nradius, h - y - 1); \
174 stype tl = ptr[(y - t) * ptr_linesize + x - l]; \
175 stype tr = ptr[(y - t) * ptr_linesize + x + r]; \
176 stype bl = ptr[(y + b) * ptr_linesize + x - l]; \
177 stype br = ptr[(y + b) * ptr_linesize + x + r]; \
178 stype ntl = ptr[(y - nt) * ptr_linesize + x - nl]; \
179 stype ntr = ptr[(y - nt) * ptr_linesize + x + nr]; \
180 stype nbl = ptr[(y + nb) * ptr_linesize + x - nl]; \
181 stype nbr = ptr[(y + nb) * ptr_linesize + x + nr]; \
182 stype div = (l + r) * (t + b); \
183 stype ndiv = (nl + nr) * (nt + nb); \
184 stype p0 = (br + tl - bl - tr) / div; \
185 stype n0 = (nbr + ntl - nbl - ntr) / ndiv; \
188 dst[x] = lerpf(p0, n0, factor); \
190 dst[x] = av_clip_uintp2_c(lrintf( \
191 lerpf(p0, n0, factor)), \
195 rptr += rptr_linesize; \
196 dst += dst_linesize; \
202 BLUR_PLANE(uint8_t, uint32_t, 8)
203 BLUR_PLANE(uint16_t, uint64_t, 16)
204 BLUR_PLANE(float, double, 32)
206 static int blur_planes(AVFilterContext *ctx, void *arg,
207 int jobnr, int nb_jobs)
209 VarBlurContext *s = ctx->priv;
210 ThreadData *td = arg;
211 AVFrame *radius = td->radius;
212 AVFrame *out = td->out;
213 AVFrame *in = td->in;
215 for (int plane = 0; plane < s->nb_planes; plane++) {
216 const int height = s->planeheight[plane];
217 const int slice_start = (height * jobnr) / nb_jobs;
218 const int slice_end = (height * (jobnr+1)) / nb_jobs;
219 const int width = s->planewidth[plane];
220 const int linesize = in->linesize[plane];
221 const int dst_linesize = out->linesize[plane];
222 const uint8_t *rptr = radius->data[plane];
223 const int rptr_linesize = radius->linesize[plane];
224 uint8_t *ptr = s->sat[plane];
225 const int ptr_linesize = s->sat_linesize[plane];
226 const uint8_t *src = in->data[plane];
227 uint8_t *dst = out->data[plane];
229 if (!(s->planes & (1 << plane))) {
231 av_image_copy_plane(dst + slice_start * dst_linesize,
233 src + slice_start * linesize,
235 width * ((s->depth + 7) / 8),
236 slice_end - slice_start);
240 s->blur_plane(ctx, dst, dst_linesize,
244 slice_start, slice_end);
250 static int blur_frame(AVFilterContext *ctx, AVFrame *in, AVFrame *radius)
252 VarBlurContext *s = ctx->priv;
253 AVFilterLink *outlink = ctx->outputs[0];
257 if (av_frame_is_writable(in)) {
260 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
263 return AVERROR(ENOMEM);
265 av_frame_copy_props(out, in);
268 for (int plane = 0; plane < s->nb_planes; plane++) {
269 const int height = s->planeheight[plane];
270 const int width = s->planewidth[plane];
271 const int linesize = in->linesize[plane];
272 uint8_t *ptr = s->sat[plane];
273 const int ptr_linesize = s->sat_linesize[plane];
274 const uint8_t *src = in->data[plane];
276 if (!(s->planes & (1 << plane)))
279 s->compute_sat(src, linesize, width, height, ptr, ptr_linesize);
285 ff_filter_execute(ctx, blur_planes, &td, NULL,
286 FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
290 return ff_filter_frame(outlink, out);
293 static int activate(AVFilterContext *ctx)
295 VarBlurContext *s = ctx->priv;
296 return ff_framesync_activate(&s->fs);
299 static int varblur_frame(FFFrameSync *fs)
301 AVFilterContext *ctx = fs->parent;
302 VarBlurContext *s = ctx->priv;
303 AVFrame *in, *radius;
306 if (s->max_radius <= s->min_radius)
307 s->max_radius = s->min_radius + 1;
309 ret = ff_framesync_dualinput_get(fs, &in, &radius);
313 return ff_filter_frame(ctx->outputs[0], in);
314 return blur_frame(ctx, in, radius);
317 static int config_output(AVFilterLink *outlink)
319 AVFilterContext *ctx = outlink->src;
320 AVFilterLink *inlink = ctx->inputs[0];
321 AVFilterLink *radiuslink = ctx->inputs[1];
322 VarBlurContext *s = ctx->priv;
323 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
326 if (inlink->w != radiuslink->w || inlink->h != radiuslink->h) {
327 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
328 "(size %dx%d) do not match the corresponding "
329 "second input link %s parameters (size %dx%d)\n",
330 ctx->input_pads[0].name, inlink->w, inlink->h,
331 ctx->input_pads[1].name, radiuslink->w, radiuslink->h);
332 return AVERROR(EINVAL);
335 outlink->w = inlink->w;
336 outlink->h = inlink->h;
337 outlink->time_base = inlink->time_base;
338 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
339 outlink->frame_rate = inlink->frame_rate;
341 s->depth = desc->comp[0].depth;
342 s->blur_plane = s->depth <= 8 ? blur_plane8 : s->depth <= 16 ? blur_plane16 : blur_plane32;
343 s->compute_sat = s->depth <= 8 ? compute_sat8 : s->depth <= 16 ? compute_sat16 : compute_sat32;
345 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(outlink->w, desc->log2_chroma_w);
346 s->planewidth[0] = s->planewidth[3] = outlink->w;
347 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h);
348 s->planeheight[0] = s->planeheight[3] = outlink->h;
350 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
352 for (int p = 0; p < s->nb_planes; p++) {
353 s->sat_linesize[p] = (outlink->w + 1) * (4 + 4 * (s->depth > 8));
354 s->sat[p] = av_calloc(s->sat_linesize[p], outlink->h + 1);
356 return AVERROR(ENOMEM);
359 s->fs.on_event = varblur_frame;
360 if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
363 ret = ff_framesync_configure(&s->fs);
364 outlink->time_base = s->fs.time_base;
369 static av_cold void uninit(AVFilterContext *ctx)
371 VarBlurContext *s = ctx->priv;
373 ff_framesync_uninit(&s->fs);
374 for (int p = 0; p < 4; p++)
375 av_freep(&s->sat[p]);
378 static const AVFilterPad varblur_inputs[] = {
381 .type = AVMEDIA_TYPE_VIDEO,
385 .type = AVMEDIA_TYPE_VIDEO,
389 static const AVFilterPad varblur_outputs[] = {
392 .type = AVMEDIA_TYPE_VIDEO,
393 .config_props = config_output,
397 const AVFilter ff_vf_varblur = {
399 .description = NULL_IF_CONFIG_SMALL("Apply Variable Blur filter."),
400 .priv_size = sizeof(VarBlurContext),
401 .priv_class = &varblur_class,
402 .activate = activate,
403 .preinit = varblur_framesync_preinit,
405 FILTER_INPUTS(varblur_inputs),
406 FILTER_OUTPUTS(varblur_outputs),
407 FILTER_PIXFMTS_ARRAY(pix_fmts),
408 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
409 AVFILTER_FLAG_SLICE_THREADS,
410 .process_command = ff_filter_process_command,