FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_kerndeint.c
Date: 2025-10-27 03:13:05
Exec Total Coverage
Lines: 103 134 76.9%
Functions: 3 3 100.0%
Branches: 28 52 53.8%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Jeremy Tran
3 * Copyright (c) 2004 Tobias Diedrich
4 * Copyright (c) 2003 Donald A. Graft
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22
23 /**
24 * @file
25 * Kernel Deinterlacer
26 * Ported from MPlayer libmpcodecs/vf_kerndeint.c.
27 */
28
29 #include "libavutil/imgutils.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34
35 #include "avfilter.h"
36 #include "filters.h"
37 #include "video.h"
38
39 typedef struct KerndeintContext {
40 const AVClass *class;
41 int frame; ///< frame count, starting from 0
42 int thresh, map, order, sharp, twoway;
43 int vsub;
44 int is_packed_rgb;
45 uint8_t *tmp_data [4]; ///< temporary plane data buffer
46 int tmp_linesize[4]; ///< temporary plane byte linesize
47 int tmp_bwidth [4]; ///< temporary plane byte width
48 } KerndeintContext;
49
50 #define OFFSET(x) offsetof(KerndeintContext, x)
51 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
52 static const AVOption kerndeint_options[] = {
53 { "thresh", "set the threshold", OFFSET(thresh), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
54 { "map", "set the map", OFFSET(map), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
55 { "order", "set the order", OFFSET(order), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
56 { "sharp", "set sharpening", OFFSET(sharp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
57 { "twoway", "set twoway", OFFSET(twoway), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
58 { NULL }
59 };
60
61 AVFILTER_DEFINE_CLASS(kerndeint);
62
63 21 static av_cold void uninit(AVFilterContext *ctx)
64 {
65 21 KerndeintContext *kerndeint = ctx->priv;
66
67 21 av_freep(&kerndeint->tmp_data[0]);
68 21 }
69
70 static const enum AVPixelFormat pix_fmts[] = {
71 AV_PIX_FMT_YUV420P,
72 AV_PIX_FMT_YUYV422,
73 AV_PIX_FMT_ARGB, AV_PIX_FMT_0RGB,
74 AV_PIX_FMT_ABGR, AV_PIX_FMT_0BGR,
75 AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0,
76 AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,
77 AV_PIX_FMT_NONE
78 };
79
80 10 static int config_props(AVFilterLink *inlink)
81 {
82 10 KerndeintContext *kerndeint = inlink->dst->priv;
83 10 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
84 int ret;
85
86 10 kerndeint->is_packed_rgb = av_pix_fmt_desc_get(inlink->format)->flags & AV_PIX_FMT_FLAG_RGB;
87 10 kerndeint->vsub = desc->log2_chroma_h;
88
89 10 ret = av_image_alloc(kerndeint->tmp_data, kerndeint->tmp_linesize,
90 10 inlink->w, inlink->h, inlink->format, 16);
91
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 10 if (ret < 0)
92 ✗ return ret;
93 10 memset(kerndeint->tmp_data[0], 0, ret);
94
95
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 10 if ((ret = av_image_fill_linesizes(kerndeint->tmp_bwidth, inlink->format, inlink->w)) < 0)
96 ✗ return ret;
97
98 10 return 0;
99 }
100
101 10 static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
102 {
103 10 KerndeintContext *kerndeint = inlink->dst->priv;
104 10 AVFilterLink *outlink = inlink->dst->outputs[0];
105 AVFrame *outpic;
106 const uint8_t *prvp; ///< Previous field's pixel line number n
107 const uint8_t *prvpp; ///< Previous field's pixel line number (n - 1)
108 const uint8_t *prvpn; ///< Previous field's pixel line number (n + 1)
109 const uint8_t *prvppp; ///< Previous field's pixel line number (n - 2)
110 const uint8_t *prvpnn; ///< Previous field's pixel line number (n + 2)
111 const uint8_t *prvp4p; ///< Previous field's pixel line number (n - 4)
112 const uint8_t *prvp4n; ///< Previous field's pixel line number (n + 4)
113
114 const uint8_t *srcp; ///< Current field's pixel line number n
115 const uint8_t *srcpp; ///< Current field's pixel line number (n - 1)
116 const uint8_t *srcpn; ///< Current field's pixel line number (n + 1)
117 const uint8_t *srcppp; ///< Current field's pixel line number (n - 2)
118 const uint8_t *srcpnn; ///< Current field's pixel line number (n + 2)
119 const uint8_t *srcp3p; ///< Current field's pixel line number (n - 3)
120 const uint8_t *srcp3n; ///< Current field's pixel line number (n + 3)
121 const uint8_t *srcp4p; ///< Current field's pixel line number (n - 4)
122 const uint8_t *srcp4n; ///< Current field's pixel line number (n + 4)
123
124 uint8_t *dstp, *dstp_saved;
125 const uint8_t *srcp_saved;
126
127 int src_linesize, psrc_linesize, dst_linesize, bwidth;
128 10 int x, y, plane, val, hi, lo, g, h, n = kerndeint->frame++;
129 double valf;
130
131 10 const int thresh = kerndeint->thresh;
132 10 const int order = kerndeint->order;
133 10 const int map = kerndeint->map;
134 10 const int sharp = kerndeint->sharp;
135 10 const int twoway = kerndeint->twoway;
136
137 10 const int is_packed_rgb = kerndeint->is_packed_rgb;
138
139 10 outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
140
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 10 if (!outpic) {
141 ✗ av_frame_free(&inpic);
142 ✗ return AVERROR(ENOMEM);
143 }
144 10 av_frame_copy_props(outpic, inpic);
145 10 outpic->flags &= ~AV_FRAME_FLAG_INTERLACED;
146
147
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 22 for (plane = 0; plane < 4 && inpic->data[plane] && inpic->linesize[plane]; plane++) {
148
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 12 h = plane == 0 ? inlink->h : AV_CEIL_RSHIFT(inlink->h, kerndeint->vsub);
149 12 bwidth = kerndeint->tmp_bwidth[plane];
150
151 12 srcp_saved = inpic->data[plane];
152 12 src_linesize = inpic->linesize[plane];
153 12 psrc_linesize = kerndeint->tmp_linesize[plane];
154 12 dstp_saved = outpic->data[plane];
155 12 dst_linesize = outpic->linesize[plane];
156 12 srcp = srcp_saved + (1 - order) * src_linesize;
157 12 dstp = dstp_saved + (1 - order) * dst_linesize;
158
159
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 1596 for (y = 0; y < h; y += 2) {
160 1584 memcpy(dstp, srcp, bwidth);
161 1584 srcp += 2 * src_linesize;
162 1584 dstp += 2 * dst_linesize;
163 }
164
165 // Copy through the lines that will be missed below.
166 12 memcpy(dstp_saved + order * dst_linesize, srcp_saved + (1 - order) * src_linesize, bwidth);
167 12 memcpy(dstp_saved + (2 + order ) * dst_linesize, srcp_saved + (3 - order) * src_linesize, bwidth);
168 12 memcpy(dstp_saved + (h - 2 + order) * dst_linesize, srcp_saved + (h - 1 - order) * src_linesize, bwidth);
169 12 memcpy(dstp_saved + (h - 4 + order) * dst_linesize, srcp_saved + (h - 3 - order) * src_linesize, bwidth);
170
171 /* For the other field choose adaptively between using the previous field
172 or the interpolant from the current field. */
173 12 prvp = kerndeint->tmp_data[plane] + 5 * psrc_linesize - (1 - order) * psrc_linesize;
174 12 prvpp = prvp - psrc_linesize;
175 12 prvppp = prvp - 2 * psrc_linesize;
176 12 prvp4p = prvp - 4 * psrc_linesize;
177 12 prvpn = prvp + psrc_linesize;
178 12 prvpnn = prvp + 2 * psrc_linesize;
179 12 prvp4n = prvp + 4 * psrc_linesize;
180
181 12 srcp = srcp_saved + 5 * src_linesize - (1 - order) * src_linesize;
182 12 srcpp = srcp - src_linesize;
183 12 srcppp = srcp - 2 * src_linesize;
184 12 srcp3p = srcp - 3 * src_linesize;
185 12 srcp4p = srcp - 4 * src_linesize;
186
187 12 srcpn = srcp + src_linesize;
188 12 srcpnn = srcp + 2 * src_linesize;
189 12 srcp3n = srcp + 3 * src_linesize;
190 12 srcp4n = srcp + 4 * src_linesize;
191
192 12 dstp = dstp_saved + 5 * dst_linesize - (1 - order) * dst_linesize;
193
194
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 1548 for (y = 5 - (1 - order); y <= h - 5 - (1 - order); y += 2) {
195
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 1750272 for (x = 0; x < bwidth; x++) {
196
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 1748736 if (thresh == 0 || n == 0 ||
197 ✗ (abs((int)prvp[x] - (int)srcp[x]) > thresh) ||
198 ✗ (abs((int)prvpp[x] - (int)srcpp[x]) > thresh) ||
199 ✗ (abs((int)prvpn[x] - (int)srcpn[x]) > thresh)) {
200
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 1748736 if (map) {
201 ✗ g = x & ~3;
202
203 ✗ if (is_packed_rgb) {
204 ✗ AV_WB32(dstp + g, 0xffffffff);
205 ✗ x = g + 3;
206 ✗ } else if (inlink->format == AV_PIX_FMT_YUYV422) {
207 // y <- 235, u <- 128, y <- 235, v <- 128
208 ✗ AV_WB32(dstp + g, 0xeb80eb80);
209 ✗ x = g + 3;
210 } else {
211 ✗ dstp[x] = plane == 0 ? 235 : 128;
212 }
213 } else {
214
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 1748736 if (is_packed_rgb) {
215 1576960 hi = 255;
216 1576960 lo = 0;
217
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 171776 } else if (inlink->format == AV_PIX_FMT_YUYV422) {
218
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 98560 hi = x & 1 ? 240 : 235;
219 98560 lo = 16;
220 } else {
221
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 73216 hi = plane == 0 ? 235 : 240;
222 73216 lo = 16;
223 }
224
225
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 1748736 if (sharp) {
226 ✗ if (twoway) {
227 ✗ valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
228 ✗ + 0.170 * ((int)srcp[x] + (int)prvp[x])
229 ✗ - 0.116 * ((int)srcppp[x] + (int)srcpnn[x] + (int)prvppp[x] + (int)prvpnn[x])
230 ✗ - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
231 ✗ + 0.031 * ((int)srcp4p[x] + (int)srcp4n[x] + (int)prvp4p[x] + (int)prvp4n[x]);
232 } else {
233 ✗ valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
234 ✗ + 0.170 * ((int)prvp[x])
235 ✗ - 0.116 * ((int)prvppp[x] + (int)prvpnn[x])
236 ✗ - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
237 ✗ + 0.031 * ((int)prvp4p[x] + (int)prvp4p[x]);
238 }
239 ✗ dstp[x] = av_clip(valf, lo, hi);
240 } else {
241
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 1748736 if (twoway) {
242 ✗ val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)srcp[x] + (int)prvp[x])
243 ✗ - (int)(srcppp[x]) - (int)(srcpnn[x])
244 ✗ - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
245 } else {
246 1748736 val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)prvp[x])
247 1748736 - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
248 }
249 1748736 dstp[x] = av_clip(val, lo, hi);
250 }
251 }
252 } else {
253 ✗ dstp[x] = srcp[x];
254 }
255 }
256 1536 prvp += 2 * psrc_linesize;
257 1536 prvpp += 2 * psrc_linesize;
258 1536 prvppp += 2 * psrc_linesize;
259 1536 prvpn += 2 * psrc_linesize;
260 1536 prvpnn += 2 * psrc_linesize;
261 1536 prvp4p += 2 * psrc_linesize;
262 1536 prvp4n += 2 * psrc_linesize;
263 1536 srcp += 2 * src_linesize;
264 1536 srcpp += 2 * src_linesize;
265 1536 srcppp += 2 * src_linesize;
266 1536 srcp3p += 2 * src_linesize;
267 1536 srcp4p += 2 * src_linesize;
268 1536 srcpn += 2 * src_linesize;
269 1536 srcpnn += 2 * src_linesize;
270 1536 srcp3n += 2 * src_linesize;
271 1536 srcp4n += 2 * src_linesize;
272 1536 dstp += 2 * dst_linesize;
273 }
274
275 12 srcp = inpic->data[plane];
276 12 dstp = kerndeint->tmp_data[plane];
277 12 av_image_copy_plane(dstp, psrc_linesize, srcp, src_linesize, bwidth, h);
278 }
279
280 10 av_frame_free(&inpic);
281 10 return ff_filter_frame(outlink, outpic);
282 }
283
284 static const AVFilterPad kerndeint_inputs[] = {
285 {
286 .name = "default",
287 .type = AVMEDIA_TYPE_VIDEO,
288 .filter_frame = filter_frame,
289 .config_props = config_props,
290 },
291 };
292
293
294 const FFFilter ff_vf_kerndeint = {
295 .p.name = "kerndeint",
296 .p.description = NULL_IF_CONFIG_SMALL("Apply kernel deinterlacing to the input."),
297 .p.priv_class = &kerndeint_class,
298 .priv_size = sizeof(KerndeintContext),
299 .uninit = uninit,
300 FILTER_INPUTS(kerndeint_inputs),
301 FILTER_OUTPUTS(ff_video_default_filterpad),
302 FILTER_PIXFMTS_ARRAY(pix_fmts),
303 };
304