FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_cas.c
Date: 2024-04-12 08:31:17
Exec Total Coverage
Lines: 0 120 0.0%
Functions: 0 5 0.0%
Branches: 0 34 0.0%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/opt.h"
20 #include "libavutil/imgutils.h"
21 #include "avfilter.h"
22 #include "internal.h"
23 #include "video.h"
24
25 typedef struct CASContext {
26 const AVClass *class;
27
28 float strength;
29 int planes;
30 int nb_planes;
31
32 int depth;
33 int planeheight[4];
34 int planewidth[4];
35
36 AVFrame *in;
37
38 int (*do_slice)(AVFilterContext *s, void *arg,
39 int jobnr, int nb_jobs);
40 } CASContext;
41
42 static inline float lerpf(float v0, float v1, float f)
43 {
44 return v0 + (v1 - v0) * f;
45 }
46
47 static int cas_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
48 {
49 CASContext *s = avctx->priv;
50 const float strength = -lerpf(16.f, 4.01f, s->strength);
51 AVFrame *out = arg;
52 AVFrame *in = s->in;
53
54 for (int p = 0; p < s->nb_planes; p++) {
55 const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
56 const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
57 const int linesize = out->linesize[p];
58 const int in_linesize = in->linesize[p];
59 const int w = s->planewidth[p];
60 const int w1 = w - 1;
61 const int h = s->planeheight[p];
62 const int h1 = h - 1;
63 uint8_t *dst = out->data[p] + slice_start * linesize;
64 const uint8_t *src = in->data[p];
65
66 if (!((1 << p) & s->planes)) {
67 av_image_copy_plane(dst, linesize, src + slice_start * in_linesize, in_linesize,
68 w, slice_end - slice_start);
69 continue;
70 }
71
72 for (int y = slice_start; y < slice_end; y++) {
73 const int y0 = FFMAX(y - 1, 0);
74 const int y1 = FFMIN(y + 1, h1);
75 for (int x = 0; x < w; x++) {
76 const int x0 = FFMAX(x - 1, 0);
77 const int x1 = FFMIN(x + 1, w1);
78 int a = src[y0 * in_linesize + x0];
79 int b = src[y0 * in_linesize + x];
80 int c = src[y0 * in_linesize + x1];
81 int d = src[y * in_linesize + x0];
82 int e = src[y * in_linesize + x];
83 int f = src[y * in_linesize + x1];
84 int g = src[y1 * in_linesize + x0];
85 int h = src[y1 * in_linesize + x];
86 int i = src[y1 * in_linesize + x1];
87 int mn, mn2, mx, mx2;
88 float amp, weight;
89
90 mn = FFMIN3(FFMIN3( d, e, f), b, h);
91 mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
92
93 mn = mn + mn2;
94
95 mx = FFMAX3(FFMAX3( d, e, f), b, h);
96 mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
97
98 mx = mx + mx2;
99
100 amp = sqrtf(av_clipf(FFMIN(mn, 511 - mx) / (float)mx, 0.f, 1.f));
101
102 weight = amp / strength;
103
104 dst[x] = av_clip_uint8(((b + d + f + h) * weight + e) / (1.f + 4.f * weight));
105 }
106 dst += linesize;
107 }
108 }
109
110 return 0;
111 }
112
113 static int cas_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
114 {
115 CASContext *s = avctx->priv;
116 const float strength = -lerpf(16.f, 4.01f, s->strength);
117 const int max = 2 * (1 << s->depth) - 1;
118 AVFrame *out = arg;
119 AVFrame *in = s->in;
120
121 for (int p = 0; p < s->nb_planes; p++) {
122 const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
123 const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
124 const int linesize = out->linesize[p] / 2;
125 const int in_linesize = in->linesize[p] / 2;
126 const int w = s->planewidth[p];
127 const int w1 = w - 1;
128 const int h = s->planeheight[p];
129 const int h1 = h - 1;
130 uint16_t *dst = ((uint16_t *)out->data[p]) + slice_start * linesize;
131 const uint16_t *src = (const uint16_t *)in->data[p];
132
133 if (!((1 << p) & s->planes)) {
134 av_image_copy_plane((uint8_t *)dst, linesize * 2, (uint8_t *)(src + slice_start * in_linesize),
135 in_linesize * 2, w * 2, slice_end - slice_start);
136 continue;
137 }
138
139 for (int y = slice_start; y < slice_end; y++) {
140 const int y0 = FFMAX(y - 1, 0);
141 const int y1 = FFMIN(y + 1, h1);
142 for (int x = 0; x < w; x++) {
143 const int x0 = FFMAX(x - 1, 0);
144 const int x1 = FFMIN(x + 1, w1);
145 int a = src[y0 * in_linesize + x0];
146 int b = src[y0 * in_linesize + x];
147 int c = src[y0 * in_linesize + x1];
148 int d = src[y * in_linesize + x0];
149 int e = src[y * in_linesize + x];
150 int f = src[y * in_linesize + x1];
151 int g = src[y1 * in_linesize + x0];
152 int h = src[y1 * in_linesize + x];
153 int i = src[y1 * in_linesize + x1];
154 int mn, mn2, mx, mx2;
155 float amp, weight;
156
157 mn = FFMIN3(FFMIN3( d, e, f), b, h);
158 mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
159
160 mn = mn + mn2;
161
162 mx = FFMAX3(FFMAX3( d, e, f), b, h);
163 mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
164
165 mx = mx + mx2;
166
167 amp = sqrtf(av_clipf(FFMIN(mn, max - mx) / (float)mx, 0.f, 1.f));
168
169 weight = amp / strength;
170
171 dst[x] = av_clip_uintp2_c(((b + d + f + h) * weight + e) / (1.f + 4.f * weight), s->depth);
172 }
173 dst += linesize;
174 }
175 }
176
177 return 0;
178 }
179
180 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
181 {
182 AVFilterContext *ctx = inlink->dst;
183 AVFilterLink *outlink = ctx->outputs[0];
184 CASContext *s = ctx->priv;
185 AVFrame *out;
186
187 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
188 if (!out) {
189 av_frame_free(&in);
190 return AVERROR(ENOMEM);
191 }
192 av_frame_copy_props(out, in);
193
194 s->in = in;
195 ff_filter_execute(ctx, s->do_slice, out, NULL,
196 FFMIN(in->height, ff_filter_get_nb_threads(ctx)));
197 av_frame_free(&in);
198 s->in = NULL;
199
200 return ff_filter_frame(ctx->outputs[0], out);
201 }
202
203 static const enum AVPixelFormat pixel_fmts[] = {
204 AV_PIX_FMT_GRAY8,
205 AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
206 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
207 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
208 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
209 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
210 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
211 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
212 AV_PIX_FMT_YUVJ411P,
213 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
214 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
215 AV_PIX_FMT_YUV440P10,
216 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
217 AV_PIX_FMT_YUV440P12,
218 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
219 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
220 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
221 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
222 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
223 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
224 AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
225 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
226 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
227 AV_PIX_FMT_NONE
228 };
229
230 static av_cold int config_input(AVFilterLink *inlink)
231 {
232 AVFilterContext *avctx = inlink->dst;
233 CASContext *s = avctx->priv;
234 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
235
236 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
237 s->planeheight[0] = s->planeheight[3] = inlink->h;
238 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
239 s->planewidth[0] = s->planewidth[3] = inlink->w;
240
241 s->depth = desc->comp[0].depth;
242 s->nb_planes = desc->nb_components;
243 s->do_slice = s->depth <= 8 ? cas_slice8 : cas_slice16;
244
245 return 0;
246 }
247
248 static const AVFilterPad cas_inputs[] = {
249 {
250 .name = "default",
251 .type = AVMEDIA_TYPE_VIDEO,
252 .filter_frame = filter_frame,
253 .config_props = config_input,
254 },
255 };
256
257 #define OFFSET(x) offsetof(CASContext, x)
258 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
259
260 static const AVOption cas_options[] = {
261 { "strength", "set the sharpening strength", OFFSET(strength), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
262 { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VF },
263 { NULL }
264 };
265
266 AVFILTER_DEFINE_CLASS(cas);
267
268 const AVFilter ff_vf_cas = {
269 .name = "cas",
270 .description = NULL_IF_CONFIG_SMALL("Contrast Adaptive Sharpen."),
271 .priv_size = sizeof(CASContext),
272 .priv_class = &cas_class,
273 FILTER_INPUTS(cas_inputs),
274 FILTER_OUTPUTS(ff_video_default_filterpad),
275 FILTER_PIXFMTS_ARRAY(pixel_fmts),
276 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
277 .process_command = ff_filter_process_command,
278 };
279