FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_gblur.c
Date: 2024-07-17 14:05:47
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1 /*
2 * Copyright (c) 2011 Pascal Getreuer
3 * Copyright (c) 2016 Paul B Mahol
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer in the documentation and/or other materials provided
13 * with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * HOLDER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <float.h>
29
30 #include "libavutil/imgutils.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "avfilter.h"
35 #include "gblur.h"
36 #include "internal.h"
37 #include "vf_gblur_init.h"
38 #include "video.h"
39
40 #define OFFSET(x) offsetof(GBlurContext, x)
41 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
42
43 static const AVOption gblur_options[] = {
44 { "sigma", "set sigma", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0.0, 1024, FLAGS },
45 { "steps", "set number of steps", OFFSET(steps), AV_OPT_TYPE_INT, {.i64=1}, 1, 6, FLAGS },
46 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
47 { "sigmaV", "set vertical sigma", OFFSET(sigmaV), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -1, 1024, FLAGS },
48 { NULL }
49 };
50
51 AVFILTER_DEFINE_CLASS(gblur);
52
53 typedef struct ThreadData {
54 int height;
55 int width;
56 } ThreadData;
57
58 static int filter_horizontally(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
59 {
60 GBlurContext *s = ctx->priv;
61 ThreadData *td = arg;
62 const int height = td->height;
63 const int width = td->width;
64 const int slice_start = (height * jobnr ) / nb_jobs;
65 const int slice_end = (height * (jobnr+1)) / nb_jobs;
66 const float boundaryscale = s->boundaryscale;
67 const int steps = s->steps;
68 const float nu = s->nu;
69 float *buffer = s->buffer;
70 float *localbuf = NULL;
71
72 if (s->localbuf)
73 localbuf = s->localbuf + s->stride * width * slice_start;
74
75 s->horiz_slice(buffer + width * slice_start, width, slice_end - slice_start,
76 steps, nu, boundaryscale, localbuf);
77 return 0;
78 }
79
80 static int filter_vertically(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
81 {
82 GBlurContext *s = ctx->priv;
83 ThreadData *td = arg;
84 const int height = td->height;
85 const int width = td->width;
86 const int slice_start = (width * jobnr ) / nb_jobs;
87 const int slice_end = (width * (jobnr+1)) / nb_jobs;
88 const float boundaryscale = s->boundaryscaleV;
89 const int steps = s->steps;
90 const float nu = s->nuV;
91 float *buffer = s->buffer;
92
93 s->verti_slice(buffer, width, height, slice_start, slice_end,
94 steps, nu, boundaryscale);
95
96 return 0;
97 }
98
99 static int filter_postscale(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
100 {
101 GBlurContext *s = ctx->priv;
102 ThreadData *td = arg;
103 const float max = s->flt ? FLT_MAX : (1 << s->depth) - 1;
104 const float min = s->flt ? -FLT_MAX : 0.f;
105 const int height = td->height;
106 const int width = td->width;
107 const int awidth = FFALIGN(width, 64);
108 const int slice_start = (height * jobnr ) / nb_jobs;
109 const int slice_end = (height * (jobnr+1)) / nb_jobs;
110 const float postscale = s->postscale * s->postscaleV;
111 const int slice_size = slice_end - slice_start;
112
113 s->postscale_slice(s->buffer + slice_start * awidth,
114 slice_size * awidth, postscale, min, max);
115
116 return 0;
117 }
118
119 static void gaussianiir2d(AVFilterContext *ctx, int plane)
120 {
121 GBlurContext *s = ctx->priv;
122 const int width = s->planewidth[plane];
123 const int height = s->planeheight[plane];
124 const int nb_threads = ff_filter_get_nb_threads(ctx);
125 ThreadData td;
126
127 if (s->sigma < 0 || s->steps < 0)
128 return;
129
130 td.width = width;
131 td.height = height;
132 ff_filter_execute(ctx, filter_horizontally, &td,
133 NULL, FFMIN(height, nb_threads));
134 ff_filter_execute(ctx, filter_vertically, &td,
135 NULL, FFMIN(width, nb_threads));
136 ff_filter_execute(ctx, filter_postscale, &td,
137 NULL, FFMIN(width * height, nb_threads));
138 }
139
140 static const enum AVPixelFormat pix_fmts[] = {
141 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
142 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
143 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
144 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
145 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
146 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
147 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
148 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
149 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
150 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
151 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
152 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
153 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
154 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
155 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
156 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
157 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
158 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
159 AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
160 AV_PIX_FMT_GRAYF32,
161 AV_PIX_FMT_NONE
162 };
163
164 static av_cold void uninit(AVFilterContext *ctx)
165 {
166 GBlurContext *s = ctx->priv;
167
168 av_freep(&s->buffer);
169 av_freep(&s->localbuf);
170 }
171
172 static int config_input(AVFilterLink *inlink)
173 {
174 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
175 GBlurContext *s = inlink->dst->priv;
176
177 uninit(inlink->dst);
178
179 s->depth = desc->comp[0].depth;
180 s->flt = !!(desc->flags & AV_PIX_FMT_FLAG_FLOAT);
181 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
182 s->planewidth[0] = s->planewidth[3] = inlink->w;
183 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
184 s->planeheight[0] = s->planeheight[3] = inlink->h;
185
186 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
187
188 s->buffer = av_malloc_array(FFALIGN(inlink->w, 64), FFALIGN(inlink->h, 64) * sizeof(*s->buffer));
189 if (!s->buffer)
190 return AVERROR(ENOMEM);
191
192 if (s->sigmaV < 0) {
193 s->sigmaV = s->sigma;
194 }
195 ff_gblur_init(s);
196
197 return 0;
198 }
199
200 static void set_params(float sigma, int steps, float *postscale, float *boundaryscale, float *nu)
201 {
202 double dnu, lambda;
203
204 lambda = (sigma * sigma) / (2.0 * steps);
205 dnu = (1.0 + 2.0 * lambda - sqrt(1.0 + 4.0 * lambda)) / (2.0 * lambda);
206 *postscale = pow(dnu / lambda, steps);
207 *boundaryscale = 1.0 / (1.0 - dnu);
208 *nu = (float)dnu;
209 if (!isnormal(*postscale))
210 *postscale = 1.f;
211 if (!isnormal(*boundaryscale))
212 *boundaryscale = 1.f;
213 if (!isnormal(*nu))
214 *nu = 0.f;
215 }
216
217 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
218 {
219 AVFilterContext *ctx = inlink->dst;
220 GBlurContext *s = ctx->priv;
221 AVFilterLink *outlink = ctx->outputs[0];
222 AVFrame *out;
223 int plane;
224
225 set_params(s->sigma, s->steps, &s->postscale, &s->boundaryscale, &s->nu);
226 set_params(s->sigmaV, s->steps, &s->postscaleV, &s->boundaryscaleV, &s->nuV);
227
228 if (av_frame_is_writable(in)) {
229 out = in;
230 } else {
231 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
232 if (!out) {
233 av_frame_free(&in);
234 return AVERROR(ENOMEM);
235 }
236 av_frame_copy_props(out, in);
237 }
238
239 for (plane = 0; plane < s->nb_planes; plane++) {
240 const int height = s->planeheight[plane];
241 const int width = s->planewidth[plane];
242 float *bptr = s->buffer;
243 const uint8_t *src = in->data[plane];
244 const uint16_t *src16 = (const uint16_t *)in->data[plane];
245 uint8_t *dst = out->data[plane];
246 uint16_t *dst16 = (uint16_t *)out->data[plane];
247 int y, x;
248
249 if (!(s->planes & (1 << plane))) {
250 if (out != in)
251 av_image_copy_plane(out->data[plane], out->linesize[plane],
252 in->data[plane], in->linesize[plane],
253 width * ((s->depth + 7) / 8), height);
254 continue;
255 }
256
257 if (s->flt) {
258 av_image_copy_plane((uint8_t *)bptr, width * sizeof(float),
259 in->data[plane], in->linesize[plane],
260 width * sizeof(float), height);
261 } else if (s->depth == 8) {
262 for (y = 0; y < height; y++) {
263 for (x = 0; x < width; x++) {
264 bptr[x] = src[x];
265 }
266 bptr += width;
267 src += in->linesize[plane];
268 }
269 } else {
270 for (y = 0; y < height; y++) {
271 for (x = 0; x < width; x++) {
272 bptr[x] = src16[x];
273 }
274 bptr += width;
275 src16 += in->linesize[plane] / 2;
276 }
277 }
278
279 gaussianiir2d(ctx, plane);
280
281 bptr = s->buffer;
282 if (s->flt) {
283 av_image_copy_plane(out->data[plane], out->linesize[plane],
284 (uint8_t *)bptr, width * sizeof(float),
285 width * sizeof(float), height);
286 } else if (s->depth == 8) {
287 for (y = 0; y < height; y++) {
288 for (x = 0; x < width; x++)
289 dst[x] = lrintf(bptr[x]);
290 bptr += width;
291 dst += out->linesize[plane];
292 }
293 } else {
294 for (y = 0; y < height; y++) {
295 for (x = 0; x < width; x++)
296 dst16[x] = lrintf(bptr[x]);
297 bptr += width;
298 dst16 += out->linesize[plane] / 2;
299 }
300 }
301 }
302
303 if (out != in)
304 av_frame_free(&in);
305 return ff_filter_frame(outlink, out);
306 }
307
308 static const AVFilterPad gblur_inputs[] = {
309 {
310 .name = "default",
311 .type = AVMEDIA_TYPE_VIDEO,
312 .config_props = config_input,
313 .filter_frame = filter_frame,
314 },
315 };
316
317 const AVFilter ff_vf_gblur = {
318 .name = "gblur",
319 .description = NULL_IF_CONFIG_SMALL("Apply Gaussian Blur filter."),
320 .priv_size = sizeof(GBlurContext),
321 .priv_class = &gblur_class,
322 .uninit = uninit,
323 FILTER_INPUTS(gblur_inputs),
324 FILTER_OUTPUTS(ff_video_default_filterpad),
325 FILTER_PIXFMTS_ARRAY(pix_fmts),
326 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
327 .process_command = ff_filter_process_command,
328 };
329