1 /*
2 * Copyright (c) 2020 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/imgutils.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
25
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30
31 typedef struct ChromaNRContext {
32 const AVClass *class;
33
34 float threshold;
35 float threshold_y;
36 float threshold_u;
37 float threshold_v;
38 int distance;
39 int thres;
40 int thres_y;
41 int thres_u;
42 int thres_v;
43 int sizew;
44 int sizeh;
45 int stepw;
46 int steph;
47 int depth;
48 int chroma_w;
49 int chroma_h;
50 int nb_planes;
51 int linesize[4];
52 int planeheight[4];
53 int planewidth[4];
54
55 AVFrame *out;
56 int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
57 } ChromaNRContext;
58
59 static const enum AVPixelFormat pix_fmts[] = {
60 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV444P,
61 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
62 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
63 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
64 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV444P10,
65 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
66 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
67 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
68 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
69 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
70 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
71 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
72 AV_PIX_FMT_NONE
73 };
74
75 #define MANHATTAN_DISTANCE(x, y, z) ((x) + (y) + (z))
76 #define EUCLIDEAN_DISTANCE(x, y, z) (sqrtf((x)*(x) + (y)*(y) + (z)*(z)))
77
78 #define FILTER_FUNC(distance, name, ctype, type, fun) \
79 static int distance ## _slice##name(AVFilterContext *ctx, void *arg, \
80 int jobnr, int nb_jobs) \
81 { \
82 ChromaNRContext *s = ctx->priv; \
83 AVFrame *in = arg; \
84 AVFrame *out = s->out; \
85 const int in_ylinesize = in->linesize[0]; \
86 const int in_ulinesize = in->linesize[1]; \
87 const int in_vlinesize = in->linesize[2]; \
88 const int out_ulinesize = out->linesize[1]; \
89 const int out_vlinesize = out->linesize[2]; \
90 const int chroma_w = s->chroma_w; \
91 const int chroma_h = s->chroma_h; \
92 const int stepw = s->stepw; \
93 const int steph = s->steph; \
94 const int sizew = s->sizew; \
95 const int sizeh = s->sizeh; \
96 const int thres = s->thres; \
97 const int thres_y = s->thres_y; \
98 const int thres_u = s->thres_u; \
99 const int thres_v = s->thres_v; \
100 const int h = s->planeheight[1]; \
101 const int w = s->planewidth[1]; \
102 const int slice_start = (h * jobnr) / nb_jobs; \
103 const int slice_end = (h * (jobnr+1)) / nb_jobs; \
104 type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize); \
105 type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize); \
106 \
107 { \
108 const int h = s->planeheight[0]; \
109 const int slice_start = (h * jobnr) / nb_jobs; \
110 const int slice_end = (h * (jobnr+1)) / nb_jobs; \
111 \
112 av_image_copy_plane(out->data[0] + slice_start * out->linesize[0], \
113 out->linesize[0], \
114 in->data[0] + slice_start * in->linesize[0], \
115 in->linesize[0], \
116 s->linesize[0], slice_end - slice_start); \
117 \
118 if (s->nb_planes == 4) { \
119 av_image_copy_plane(out->data[3] + slice_start * out->linesize[3], \
120 out->linesize[3], \
121 in->data[3] + slice_start * in->linesize[3], \
122 in->linesize[3], \
123 s->linesize[3], slice_end - slice_start); \
124 } \
125 } \
126 \
127 for (int y = slice_start; y < slice_end; y++) { \
128 const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
129 const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize); \
130 const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize); \
131 \
132 for (int x = 0; x < w; x++) { \
133 const int cy = in_yptr[x * chroma_w]; \
134 const int cu = in_uptr[x]; \
135 const int cv = in_vptr[x]; \
136 int su = cu; \
137 int sv = cv; \
138 int cn = 1; \
139 \
140 for (int yy = FFMAX(0, y - sizeh); yy <= FFMIN(y + sizeh, h - 1); yy += steph) { \
141 const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
142 const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize); \
143 const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize); \
144 \
145 for (int xx = FFMAX(0, x - sizew); xx <= FFMIN(x + sizew, w - 1); xx += stepw) { \
146 const ctype Y = in_yptr[xx * chroma_w]; \
147 const ctype U = in_uptr[xx]; \
148 const ctype V = in_vptr[xx]; \
149 const ctype cyY = FFABS(cy - Y); \
150 const ctype cuU = FFABS(cu - U); \
151 const ctype cvV = FFABS(cv - V); \
152 \
153 if (fun(cyY, cuU, cvV) < thres && \
154 cuU < thres_u && cvV < thres_v && \
155 cyY < thres_y && \
156 xx != x && yy != y) { \
157 su += U; \
158 sv += V; \
159 cn++; \
160 } \
161 } \
162 } \
163 \
164 out_uptr[x] = (su + (cn >> 1)) / cn; \
165 out_vptr[x] = (sv + (cn >> 1)) / cn; \
166 } \
167 \
168 out_uptr += out_ulinesize / sizeof(type); \
169 out_vptr += out_vlinesize / sizeof(type); \
170 } \
171 \
172 return 0; \
173 }
174
175 FILTER_FUNC(manhattan, 8, int, uint8_t, MANHATTAN_DISTANCE)
176 FILTER_FUNC(manhattan, 16, int, uint16_t, MANHATTAN_DISTANCE)
177
178 FILTER_FUNC(euclidean, 8, int, uint8_t, EUCLIDEAN_DISTANCE)
179 FILTER_FUNC(euclidean, 16, int64_t, uint16_t, EUCLIDEAN_DISTANCE)
180
filter_frame(AVFilterLink * inlink,AVFrame * in)181 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
182 {
183 AVFilterContext *ctx = inlink->dst;
184 AVFilterLink *outlink = ctx->outputs[0];
185 ChromaNRContext *s = ctx->priv;
186 AVFrame *out;
187
188 switch (s->distance) {
189 case 0:
190 s->filter_slice = s->depth <= 8 ? manhattan_slice8 : manhattan_slice16;
191 break;
192 case 1:
193 s->filter_slice = s->depth <= 8 ? euclidean_slice8 : euclidean_slice16;
194 break;
195 }
196
197 s->thres = s->threshold * (1 << (s->depth - 8));
198 s->thres_y = s->threshold_y * (1 << (s->depth - 8));
199 s->thres_u = s->threshold_u * (1 << (s->depth - 8));
200 s->thres_v = s->threshold_v * (1 << (s->depth - 8));
201
202 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
203 if (!out) {
204 av_frame_free(&in);
205 return AVERROR(ENOMEM);
206 }
207
208 av_frame_copy_props(out, in);
209 s->out = out;
210 ff_filter_execute(ctx, s->filter_slice, in, NULL,
211 FFMIN3(s->planeheight[1],
212 s->planeheight[2],
213 ff_filter_get_nb_threads(ctx)));
214
215 av_frame_free(&in);
216 return ff_filter_frame(outlink, out);
217 }
218
config_input(AVFilterLink * inlink)219 static int config_input(AVFilterLink *inlink)
220 {
221 AVFilterContext *ctx = inlink->dst;
222 ChromaNRContext *s = ctx->priv;
223 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
224 int ret;
225
226 s->nb_planes = desc->nb_components;
227 s->depth = desc->comp[0].depth;
228 s->chroma_w = 1 << desc->log2_chroma_w;
229 s->chroma_h = 1 << desc->log2_chroma_h;
230 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
231 s->planeheight[0] = s->planeheight[3] = inlink->h;
232 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
233 s->planewidth[0] = s->planewidth[3] = inlink->w;
234
235 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
236 return ret;
237
238 return 0;
239 }
240
241 #define OFFSET(x) offsetof(ChromaNRContext, x)
242 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
243
244 static const AVOption chromanr_options[] = {
245 { "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
246 { "sizew", "set horizontal size", OFFSET(sizew), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
247 { "sizeh", "set vertical size", OFFSET(sizeh), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
248 { "stepw", "set horizontal step", OFFSET(stepw), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
249 { "steph", "set vertical step", OFFSET(steph), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
250 { "threy", "set y threshold", OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
251 { "threu", "set u threshold", OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
252 { "threv", "set v threshold", OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
253 { "distance", "set distance type", OFFSET(distance), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "distance" },
254 { "manhattan", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, VF, "distance" },
255 { "euclidean", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, VF, "distance" },
256 { NULL }
257 };
258
259 static const AVFilterPad inputs[] = {
260 {
261 .name = "default",
262 .type = AVMEDIA_TYPE_VIDEO,
263 .filter_frame = filter_frame,
264 .config_props = config_input,
265 },
266 };
267
268 static const AVFilterPad outputs[] = {
269 {
270 .name = "default",
271 .type = AVMEDIA_TYPE_VIDEO,
272 },
273 };
274
275 AVFILTER_DEFINE_CLASS(chromanr);
276
277 const AVFilter ff_vf_chromanr = {
278 .name = "chromanr",
279 .description = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
280 .priv_size = sizeof(ChromaNRContext),
281 .priv_class = &chromanr_class,
282 FILTER_OUTPUTS(outputs),
283 FILTER_INPUTS(inputs),
284 FILTER_PIXFMTS_ARRAY(pix_fmts),
285 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
286 .process_command = ff_filter_process_command,
287 };
288