FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_epx.c
Date: 2025-10-24 21:16:34
Exec Total Coverage
Lines: 136 139 97.8%
Functions: 4 4 100.0%
Branches: 95 101 94.1%
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/pixdesc.h"
21
22 #include "filters.h"
23 #include "video.h"
24
25 typedef struct EPXContext {
26 const AVClass *class;
27
28 int n;
29
30 int (*epx_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
31 } EPXContext;
32
33 typedef struct ThreadData {
34 AVFrame *in, *out;
35 } ThreadData;
36
37 #define OFFSET(x) offsetof(EPXContext, x)
38 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
39 static const AVOption epx_options[] = {
40 { "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 3, .flags = FLAGS },
41 { NULL }
42 };
43
44 AVFILTER_DEFINE_CLASS(epx);
45
46 18 static int epx2_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
47 {
48 18 ThreadData *td = arg;
49 18 const AVFrame *in = td->in;
50 18 AVFrame *out = td->out;
51 18 const int slice_start = (in->height * jobnr ) / nb_jobs;
52 18 const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
53
54
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 36 for (int p = 0; p < 1; p++) {
55 18 const int width = in->width;
56 18 const int height = in->height;
57 18 const int src_linesize = in->linesize[p] / 4;
58 18 const int dst_linesize = out->linesize[p] / 4;
59 18 const uint32_t *src = (const uint32_t *)in->data[p];
60 18 uint32_t *dst = (uint32_t *)out->data[p];
61 const uint32_t *src_line[3];
62
63 18 src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
64 18 src_line[1] = src + src_linesize * slice_start;
65
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 18 src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
66
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 536 for (int y = slice_start; y < slice_end; y++) {
68 uint32_t *dst_line[2];
69
70 518 dst_line[0] = dst + dst_linesize*2*y;
71 518 dst_line[1] = dst + dst_linesize*(2*y+1);
72
73
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 99456 for (int x = 0; x < width; x++) {
74 uint32_t E0, E1, E2, E3;
75 uint32_t B, D, E, F, H;
76
77 98938 B = src_line[0][x];
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 98938 D = src_line[1][FFMAX(x-1, 0)];
79 98938 E = src_line[1][x];
80
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 98938 F = src_line[1][FFMIN(x+1, width - 1)];
81 98938 H = src_line[2][x];
82
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 98938 if (B != H && D != F) {
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 23048 E0 = D == B ? D : E;
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 23048 E1 = B == F ? F : E;
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 23048 E2 = D == H ? D : E;
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 23048 E3 = H == F ? F : E;
88 } else {
89 75890 E0 = E;
90 75890 E1 = E;
91 75890 E2 = E;
92 75890 E3 = E;
93 }
94
95 98938 dst_line[0][x*2] = E0;
96 98938 dst_line[0][x*2+1] = E1;
97 98938 dst_line[1][x*2] = E2;
98 98938 dst_line[1][x*2+1] = E3;
99 }
100
101 518 src_line[0] = src_line[1];
102 518 src_line[1] = src_line[2];
103 518 src_line[2] = src_line[1];
104
105
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 518 if (y < height - 2)
106 514 src_line[2] += src_linesize;
107 }
108 }
109
110 18 return 0;
111 }
112
113 18 static int epx3_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
114 {
115 18 ThreadData *td = arg;
116 18 const AVFrame *in = td->in;
117 18 AVFrame *out = td->out;
118 18 const int slice_start = (in->height * jobnr ) / nb_jobs;
119 18 const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
120
121
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 36 for (int p = 0; p < 1; p++) {
122 18 const int width = in->width;
123 18 const int height = in->height;
124 18 const int src_linesize = in->linesize[p] / 4;
125 18 const int dst_linesize = out->linesize[p] / 4;
126 18 const uint32_t *src = (const uint32_t *)in->data[p];
127 18 uint32_t *dst = (uint32_t *)out->data[p];
128 const uint32_t *src_line[3];
129
130 18 src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
131 18 src_line[1] = src + src_linesize * slice_start;
132
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 18 src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
133
134
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 536 for (int y = slice_start; y < slice_end; y++) {
135 uint32_t *dst_line[3];
136
137 518 dst_line[0] = dst + dst_linesize*3*y;
138 518 dst_line[1] = dst + dst_linesize*(3*y+1);
139 518 dst_line[2] = dst + dst_linesize*(3*y+2);
140
141
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 99456 for (int x = 0; x < width; x++) {
142 uint32_t E0, E1, E2, E3, E4, E5, E6, E7, E8;
143 uint32_t A, B, C, D, E, F, G, H, I;
144
145
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 98938 A = src_line[0][FFMAX(x-1, 0)];
146 98938 B = src_line[0][x];
147
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 98938 C = src_line[0][FFMIN(x+1, width - 1)];
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 98938 D = src_line[1][FFMAX(x-1, 0)];
149 98938 E = src_line[1][x];
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 98938 F = src_line[1][FFMIN(x+1, width - 1)];
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 98938 G = src_line[2][FFMAX(x-1, 0)];
152 98938 H = src_line[2][x];
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 98938 I = src_line[2][FFMIN(x+1, width - 1)];
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 98938 if (B != H && D != F) {
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 23048 E0 = D == B ? D : E;
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 23048 E1 = (D == B && E != C) || (B == F && E != A) ? B : E;
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 23048 E2 = B == F ? F : E;
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 23048 E3 = (D == B && E != G) || (D == H && E != A) ? D : E;
160 23048 E4 = E;
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 23048 E5 = (B == F && E != I) || (H == F && E != C) ? F : E;
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 23048 E6 = D == H ? D : E;
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 23048 E7 = (D == H && E != I) || (H == F && E != G) ? H : E;
164
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 23048 E8 = H == F ? F : E;
165 } else {
166 75890 E0 = E;
167 75890 E1 = E;
168 75890 E2 = E;
169 75890 E3 = E;
170 75890 E4 = E;
171 75890 E5 = E;
172 75890 E6 = E;
173 75890 E7 = E;
174 75890 E8 = E;
175 }
176
177 98938 dst_line[0][x*3] = E0;
178 98938 dst_line[0][x*3+1] = E1;
179 98938 dst_line[0][x*3+2] = E2;
180 98938 dst_line[1][x*3] = E3;
181 98938 dst_line[1][x*3+1] = E4;
182 98938 dst_line[1][x*3+2] = E5;
183 98938 dst_line[2][x*3] = E6;
184 98938 dst_line[2][x*3+1] = E7;
185 98938 dst_line[2][x*3+2] = E8;
186 }
187
188 518 src_line[0] = src_line[1];
189 518 src_line[1] = src_line[2];
190 518 src_line[2] = src_line[1];
191
192
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 518 if (y < height - 2)
193 514 src_line[2] += src_linesize;
194 }
195 }
196
197 18 return 0;
198 }
199
200 4 static int config_output(AVFilterLink *outlink)
201 {
202 4 AVFilterContext *ctx = outlink->src;
203 4 EPXContext *s = ctx->priv;
204 4 AVFilterLink *inlink = ctx->inputs[0];
205 const AVPixFmtDescriptor *desc;
206
207 4 desc = av_pix_fmt_desc_get(outlink->format);
208
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 4 if (!desc)
209 ✗ return AVERROR_BUG;
210
211 4 outlink->w = inlink->w * s->n;
212 4 outlink->h = inlink->h * s->n;
213
214
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 4 switch (s->n) {
215 2 case 2:
216 2 s->epx_slice = epx2_slice;
217 2 break;
218 2 case 3:
219 2 s->epx_slice = epx3_slice;
220 2 break;
221 }
222
223 4 return 0;
224 }
225
226 static const enum AVPixelFormat pix_fmts[] = {
227 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
228 AV_PIX_FMT_NONE,
229 };
230
231 4 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
232 {
233 4 AVFilterContext *ctx = inlink->dst;
234 4 AVFilterLink *outlink = ctx->outputs[0];
235 4 EPXContext *s = ctx->priv;
236 ThreadData td;
237
238 4 AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
239
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 4 if (!out) {
240 ✗ av_frame_free(&in);
241 ✗ return AVERROR(ENOMEM);
242 }
243
244 4 av_frame_copy_props(out, in);
245
246 4 td.in = in, td.out = out;
247 4 ff_filter_execute(ctx, s->epx_slice, &td, NULL,
248
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 4 FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
249
250 4 av_frame_free(&in);
251 4 return ff_filter_frame(outlink, out);
252 }
253
254 static const AVFilterPad inputs[] = {
255 {
256 .name = "default",
257 .type = AVMEDIA_TYPE_VIDEO,
258 .filter_frame = filter_frame,
259 },
260 };
261
262 static const AVFilterPad outputs[] = {
263 {
264 .name = "default",
265 .type = AVMEDIA_TYPE_VIDEO,
266 .config_props = config_output,
267 },
268 };
269
270 const FFFilter ff_vf_epx = {
271 .p.name = "epx",
272 .p.description = NULL_IF_CONFIG_SMALL("Scale the input using EPX algorithm."),
273 .p.priv_class = &epx_class,
274 .p.flags = AVFILTER_FLAG_SLICE_THREADS,
275 FILTER_INPUTS(inputs),
276 FILTER_OUTPUTS(outputs),
277 FILTER_PIXFMTS_ARRAY(pix_fmts),
278 .priv_size = sizeof(EPXContext),
279 };
280