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path: root/libavfilter/vf_threshold.c (plain)
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1/*
2 * Copyright (c) 2016 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/**
22 * @file
23 * threshold video filter
24 */
25
26#include "libavutil/imgutils.h"
27#include "libavutil/internal.h"
28#include "libavutil/opt.h"
29#include "libavutil/pixdesc.h"
30#include "avfilter.h"
31#include "framesync.h"
32#include "internal.h"
33#include "video.h"
34
35typedef struct ThresholdContext {
36 const AVClass *class;
37
38 int planes;
39 int bpc;
40
41 int nb_planes;
42 int width[4], height[4];
43
44 void (*threshold)(const uint8_t *in, const uint8_t *threshold,
45 const uint8_t *min, const uint8_t *max,
46 uint8_t *out,
47 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
48 ptrdiff_t flinesize, ptrdiff_t slinesize,
49 ptrdiff_t olinesize,
50 int w, int h);
51
52 AVFrame *frames[4];
53 FFFrameSync fs;
54} ThresholdContext;
55
56#define OFFSET(x) offsetof(ThresholdContext, x)
57#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
58
59static const AVOption threshold_options[] = {
60 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS},
61 { NULL }
62};
63
64AVFILTER_DEFINE_CLASS(threshold);
65
66static int query_formats(AVFilterContext *ctx)
67{
68 static const enum AVPixelFormat pix_fmts[] = {
69 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
70 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
71 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
72 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
73 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
74 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
75 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
76 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
77 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
78 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
79 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
80 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
81 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
82 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16,
83 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10,
84 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
85 AV_PIX_FMT_NONE
86 };
87
88 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
89}
90
91static int process_frame(FFFrameSync *fs)
92{
93 AVFilterContext *ctx = fs->parent;
94 ThresholdContext *s = fs->opaque;
95 AVFilterLink *outlink = ctx->outputs[0];
96 AVFrame *out, *in, *threshold, *min, *max;
97 int ret;
98
99 if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
100 (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
101 (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
102 (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
103 return ret;
104
105 if (ctx->is_disabled) {
106 out = av_frame_clone(in);
107 if (!out)
108 return AVERROR(ENOMEM);
109 } else {
110 int p;
111
112 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
113 if (!out)
114 return AVERROR(ENOMEM);
115 av_frame_copy_props(out, in);
116
117 for (p = 0; p < s->nb_planes; p++) {
118 if (!(s->planes & (1 << p))) {
119 av_image_copy_plane(out->data[p], out->linesize[p],
120 in->data[p], in->linesize[p],
121 s->width[p] * s->bpc,
122 s->height[p]);
123 continue;
124 }
125 s->threshold(in->data[p], threshold->data[p],
126 min->data[p], max->data[p],
127 out->data[p],
128 in->linesize[p], threshold->linesize[p],
129 min->linesize[p], max->linesize[p],
130 out->linesize[p],
131 s->width[p], s->height[p]);
132 }
133 }
134
135 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
136
137 return ff_filter_frame(outlink, out);
138}
139
140static void threshold8(const uint8_t *in, const uint8_t *threshold,
141 const uint8_t *min, const uint8_t *max,
142 uint8_t *out,
143 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
144 ptrdiff_t flinesize, ptrdiff_t slinesize,
145 ptrdiff_t olinesize,
146 int w, int h)
147{
148 int x, y;
149
150 for (y = 0; y < h; y++) {
151 for (x = 0; x < w; x++) {
152 out[x] = in[x] < threshold[x] ? min[x] : max[x];
153 }
154
155 in += ilinesize;
156 threshold += tlinesize;
157 min += flinesize;
158 max += flinesize;
159 out += olinesize;
160 }
161}
162
163static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
164 const uint8_t *ffirst, const uint8_t *ssecond,
165 uint8_t *oout,
166 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
167 ptrdiff_t flinesize, ptrdiff_t slinesize,
168 ptrdiff_t olinesize,
169 int w, int h)
170{
171 const uint16_t *in = (const uint16_t *)iin;
172 const uint16_t *threshold = (const uint16_t *)tthreshold;
173 const uint16_t *min = (const uint16_t *)ffirst;
174 const uint16_t *max = (const uint16_t *)ssecond;
175 uint16_t *out = (uint16_t *)oout;
176 int x, y;
177
178 for (y = 0; y < h; y++) {
179 for (x = 0; x < w; x++) {
180 out[x] = in[x] < threshold[x] ? min[x] : max[x];
181 }
182
183 in += ilinesize / 2;
184 threshold += tlinesize / 2;
185 min += flinesize / 2;
186 max += flinesize / 2;
187 out += olinesize / 2;
188 }
189}
190
191static int config_input(AVFilterLink *inlink)
192{
193 AVFilterContext *ctx = inlink->dst;
194 ThresholdContext *s = ctx->priv;
195 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
196 int vsub, hsub;
197
198 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
199
200 hsub = desc->log2_chroma_w;
201 vsub = desc->log2_chroma_h;
202 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
203 s->height[0] = s->height[3] = inlink->h;
204 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
205 s->width[0] = s->width[3] = inlink->w;
206
207 if (desc->comp[0].depth == 8) {
208 s->threshold = threshold8;
209 s->bpc = 1;
210 } else {
211 s->threshold = threshold16;
212 s->bpc = 2;
213 }
214
215 return 0;
216}
217
218static int config_output(AVFilterLink *outlink)
219{
220 AVFilterContext *ctx = outlink->src;
221 ThresholdContext *s = ctx->priv;
222 AVFilterLink *base = ctx->inputs[0];
223 AVFilterLink *threshold = ctx->inputs[1];
224 AVFilterLink *min = ctx->inputs[2];
225 AVFilterLink *max = ctx->inputs[3];
226 FFFrameSyncIn *in;
227 int ret;
228
229 if (base->format != threshold->format ||
230 base->format != min->format ||
231 base->format != max->format) {
232 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
233 return AVERROR(EINVAL);
234 }
235 if (base->w != threshold->w ||
236 base->h != threshold->h ||
237 base->w != min->w ||
238 base->h != min->h ||
239 base->w != max->w ||
240 base->h != max->h) {
241 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
242 "(size %dx%d) do not match the corresponding "
243 "second input link %s parameters (%dx%d) "
244 "and/or third input link %s parameters (%dx%d) "
245 "and/or fourth input link %s parameters (%dx%d)\n",
246 ctx->input_pads[0].name, base->w, base->h,
247 ctx->input_pads[1].name, threshold->w, threshold->h,
248 ctx->input_pads[2].name, min->w, min->h,
249 ctx->input_pads[3].name, max->w, max->h);
250 return AVERROR(EINVAL);
251 }
252
253 outlink->w = base->w;
254 outlink->h = base->h;
255 outlink->time_base = base->time_base;
256 outlink->sample_aspect_ratio = base->sample_aspect_ratio;
257 outlink->frame_rate = base->frame_rate;
258
259 if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
260 return ret;
261
262 in = s->fs.in;
263 in[0].time_base = base->time_base;
264 in[1].time_base = threshold->time_base;
265 in[2].time_base = min->time_base;
266 in[3].time_base = max->time_base;
267 in[0].sync = 1;
268 in[0].before = EXT_STOP;
269 in[0].after = EXT_STOP;
270 in[1].sync = 1;
271 in[1].before = EXT_STOP;
272 in[1].after = EXT_STOP;
273 in[2].sync = 1;
274 in[2].before = EXT_STOP;
275 in[2].after = EXT_STOP;
276 in[3].sync = 1;
277 in[3].before = EXT_STOP;
278 in[3].after = EXT_STOP;
279 s->fs.opaque = s;
280 s->fs.on_event = process_frame;
281
282 return ff_framesync_configure(&s->fs);
283}
284
285static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
286{
287 ThresholdContext *s = inlink->dst->priv;
288 return ff_framesync_filter_frame(&s->fs, inlink, buf);
289}
290
291static int request_frame(AVFilterLink *outlink)
292{
293 ThresholdContext *s = outlink->src->priv;
294 return ff_framesync_request_frame(&s->fs, outlink);
295}
296
297static av_cold void uninit(AVFilterContext *ctx)
298{
299 ThresholdContext *s = ctx->priv;
300
301 ff_framesync_uninit(&s->fs);
302}
303
304static const AVFilterPad inputs[] = {
305 {
306 .name = "default",
307 .type = AVMEDIA_TYPE_VIDEO,
308 .filter_frame = filter_frame,
309 .config_props = config_input,
310 },
311 {
312 .name = "threshold",
313 .type = AVMEDIA_TYPE_VIDEO,
314 .filter_frame = filter_frame,
315 },
316 {
317 .name = "min",
318 .type = AVMEDIA_TYPE_VIDEO,
319 .filter_frame = filter_frame,
320 },
321 {
322 .name = "max",
323 .type = AVMEDIA_TYPE_VIDEO,
324 .filter_frame = filter_frame,
325 },
326 { NULL }
327};
328
329static const AVFilterPad outputs[] = {
330 {
331 .name = "default",
332 .type = AVMEDIA_TYPE_VIDEO,
333 .config_props = config_output,
334 .request_frame = request_frame,
335 },
336 { NULL }
337};
338
339AVFilter ff_vf_threshold = {
340 .name = "threshold",
341 .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
342 .priv_size = sizeof(ThresholdContext),
343 .priv_class = &threshold_class,
344 .uninit = uninit,
345 .query_formats = query_formats,
346 .inputs = inputs,
347 .outputs = outputs,
348 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
349};
350
generated by cgit at 2024-05-17 05:01:08 (GMT)