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 #include "threshold.h"
35
36 #define OFFSET(x) offsetof(ThresholdContext, x)
37 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
38
39 static const AVOption threshold_options[] = {
40 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS},
41 { NULL }
42 };
43
44 AVFILTER_DEFINE_CLASS(threshold);
45
query_formats(AVFilterContext * ctx)46 static int query_formats(AVFilterContext *ctx)
47 {
48 static const enum AVPixelFormat pix_fmts[] = {
49 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
50 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
51 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
52 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
53 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
54 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
55 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
56 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
57 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
58 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
59 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
60 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
61 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
62 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12 , AV_PIX_FMT_GBRAP16,
63 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
64 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
65 AV_PIX_FMT_NONE
66 };
67
68 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
69 }
70
71 typedef struct ThreadData {
72 AVFrame *in;
73 AVFrame *threshold;
74 AVFrame *min;
75 AVFrame *max;
76 AVFrame *out;
77 } ThreadData;
78
filter_slice(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)79 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
80 {
81 ThresholdContext *s = ctx->priv;
82 ThreadData *td = arg;
83 AVFrame *min = td->min;
84 AVFrame *max = td->max;
85 AVFrame *threshold = td->threshold;
86 AVFrame *in = td->in;
87 AVFrame *out = td->out;
88
89 for (int p = 0; p < s->nb_planes; p++) {
90 const int h = s->height[p];
91 const int slice_start = (h * jobnr) / nb_jobs;
92 const int slice_end = (h * (jobnr+1)) / nb_jobs;
93
94 if (!(s->planes & (1 << p))) {
95 av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
96 out->linesize[p],
97 in->data[p] + slice_start * in->linesize[p],
98 in->linesize[p],
99 s->width[p] * s->bpc,
100 slice_end - slice_start);
101 continue;
102 }
103 s->threshold(in->data[p] + slice_start * in->linesize[p],
104 threshold->data[p] + slice_start * threshold->linesize[p],
105 min->data[p] + slice_start * min->linesize[p],
106 max->data[p] + slice_start * max->linesize[p],
107 out->data[p] + slice_start * out->linesize[p],
108 in->linesize[p], threshold->linesize[p],
109 min->linesize[p], max->linesize[p],
110 out->linesize[p],
111 s->width[p], slice_end - slice_start);
112 }
113
114 return 0;
115 }
116
process_frame(FFFrameSync * fs)117 static int process_frame(FFFrameSync *fs)
118 {
119 AVFilterContext *ctx = fs->parent;
120 ThresholdContext *s = fs->opaque;
121 AVFilterLink *outlink = ctx->outputs[0];
122 AVFrame *out, *in, *threshold, *min, *max;
123 ThreadData td;
124 int ret;
125
126 if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
127 (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
128 (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
129 (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
130 return ret;
131
132 if (ctx->is_disabled) {
133 out = av_frame_clone(in);
134 if (!out)
135 return AVERROR(ENOMEM);
136 } else {
137 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
138 if (!out)
139 return AVERROR(ENOMEM);
140 av_frame_copy_props(out, in);
141
142 td.out = out;
143 td.in = in;
144 td.threshold = threshold;
145 td.min = min;
146 td.max = max;
147 ctx->internal->execute(ctx, filter_slice, &td, NULL,
148 FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
149 }
150
151 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
152
153 return ff_filter_frame(outlink, out);
154 }
155
threshold8(const uint8_t * in,const uint8_t * threshold,const uint8_t * min,const uint8_t * max,uint8_t * out,ptrdiff_t ilinesize,ptrdiff_t tlinesize,ptrdiff_t flinesize,ptrdiff_t slinesize,ptrdiff_t olinesize,int w,int h)156 static void threshold8(const uint8_t *in, const uint8_t *threshold,
157 const uint8_t *min, const uint8_t *max,
158 uint8_t *out,
159 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
160 ptrdiff_t flinesize, ptrdiff_t slinesize,
161 ptrdiff_t olinesize,
162 int w, int h)
163 {
164 int x, y;
165
166 for (y = 0; y < h; y++) {
167 for (x = 0; x < w; x++) {
168 out[x] = in[x] < threshold[x] ? min[x] : max[x];
169 }
170
171 in += ilinesize;
172 threshold += tlinesize;
173 min += flinesize;
174 max += slinesize;
175 out += olinesize;
176 }
177 }
178
threshold16(const uint8_t * iin,const uint8_t * tthreshold,const uint8_t * ffirst,const uint8_t * ssecond,uint8_t * oout,ptrdiff_t ilinesize,ptrdiff_t tlinesize,ptrdiff_t flinesize,ptrdiff_t slinesize,ptrdiff_t olinesize,int w,int h)179 static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
180 const uint8_t *ffirst, const uint8_t *ssecond,
181 uint8_t *oout,
182 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
183 ptrdiff_t flinesize, ptrdiff_t slinesize,
184 ptrdiff_t olinesize,
185 int w, int h)
186 {
187 const uint16_t *in = (const uint16_t *)iin;
188 const uint16_t *threshold = (const uint16_t *)tthreshold;
189 const uint16_t *min = (const uint16_t *)ffirst;
190 const uint16_t *max = (const uint16_t *)ssecond;
191 uint16_t *out = (uint16_t *)oout;
192 int x, y;
193
194 for (y = 0; y < h; y++) {
195 for (x = 0; x < w; x++) {
196 out[x] = in[x] < threshold[x] ? min[x] : max[x];
197 }
198
199 in += ilinesize / 2;
200 threshold += tlinesize / 2;
201 min += flinesize / 2;
202 max += slinesize / 2;
203 out += olinesize / 2;
204 }
205 }
206
config_input(AVFilterLink * inlink)207 static int config_input(AVFilterLink *inlink)
208 {
209 AVFilterContext *ctx = inlink->dst;
210 ThresholdContext *s = ctx->priv;
211 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
212 int vsub, hsub;
213
214 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
215
216 hsub = desc->log2_chroma_w;
217 vsub = desc->log2_chroma_h;
218 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
219 s->height[0] = s->height[3] = inlink->h;
220 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
221 s->width[0] = s->width[3] = inlink->w;
222 s->depth = desc->comp[0].depth;
223
224 ff_threshold_init(s);
225
226 return 0;
227 }
228
ff_threshold_init(ThresholdContext * s)229 void ff_threshold_init(ThresholdContext *s)
230 {
231 if (s->depth == 8) {
232 s->threshold = threshold8;
233 s->bpc = 1;
234 } else {
235 s->threshold = threshold16;
236 s->bpc = 2;
237 }
238
239 if (ARCH_X86)
240 ff_threshold_init_x86(s);
241 }
242
config_output(AVFilterLink * outlink)243 static int config_output(AVFilterLink *outlink)
244 {
245 AVFilterContext *ctx = outlink->src;
246 ThresholdContext *s = ctx->priv;
247 AVFilterLink *base = ctx->inputs[0];
248 AVFilterLink *threshold = ctx->inputs[1];
249 AVFilterLink *min = ctx->inputs[2];
250 AVFilterLink *max = ctx->inputs[3];
251 FFFrameSyncIn *in;
252 int ret;
253
254 if (base->format != threshold->format ||
255 base->format != min->format ||
256 base->format != max->format) {
257 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
258 return AVERROR(EINVAL);
259 }
260 if (base->w != threshold->w ||
261 base->h != threshold->h ||
262 base->w != min->w ||
263 base->h != min->h ||
264 base->w != max->w ||
265 base->h != max->h) {
266 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
267 "(size %dx%d) do not match the corresponding "
268 "second input link %s parameters (%dx%d) "
269 "and/or third input link %s parameters (%dx%d) "
270 "and/or fourth input link %s parameters (%dx%d)\n",
271 ctx->input_pads[0].name, base->w, base->h,
272 ctx->input_pads[1].name, threshold->w, threshold->h,
273 ctx->input_pads[2].name, min->w, min->h,
274 ctx->input_pads[3].name, max->w, max->h);
275 return AVERROR(EINVAL);
276 }
277
278 outlink->w = base->w;
279 outlink->h = base->h;
280 outlink->sample_aspect_ratio = base->sample_aspect_ratio;
281 outlink->frame_rate = base->frame_rate;
282
283 if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
284 return ret;
285
286 in = s->fs.in;
287 in[0].time_base = base->time_base;
288 in[1].time_base = threshold->time_base;
289 in[2].time_base = min->time_base;
290 in[3].time_base = max->time_base;
291 in[0].sync = 1;
292 in[0].before = EXT_STOP;
293 in[0].after = EXT_STOP;
294 in[1].sync = 1;
295 in[1].before = EXT_STOP;
296 in[1].after = EXT_STOP;
297 in[2].sync = 1;
298 in[2].before = EXT_STOP;
299 in[2].after = EXT_STOP;
300 in[3].sync = 1;
301 in[3].before = EXT_STOP;
302 in[3].after = EXT_STOP;
303 s->fs.opaque = s;
304 s->fs.on_event = process_frame;
305
306 ret = ff_framesync_configure(&s->fs);
307 outlink->time_base = s->fs.time_base;
308
309 return ret;
310 }
311
activate(AVFilterContext * ctx)312 static int activate(AVFilterContext *ctx)
313 {
314 ThresholdContext *s = ctx->priv;
315 return ff_framesync_activate(&s->fs);
316 }
317
uninit(AVFilterContext * ctx)318 static av_cold void uninit(AVFilterContext *ctx)
319 {
320 ThresholdContext *s = ctx->priv;
321
322 ff_framesync_uninit(&s->fs);
323 }
324
325 static const AVFilterPad inputs[] = {
326 {
327 .name = "default",
328 .type = AVMEDIA_TYPE_VIDEO,
329 .config_props = config_input,
330 },
331 {
332 .name = "threshold",
333 .type = AVMEDIA_TYPE_VIDEO,
334 },
335 {
336 .name = "min",
337 .type = AVMEDIA_TYPE_VIDEO,
338 },
339 {
340 .name = "max",
341 .type = AVMEDIA_TYPE_VIDEO,
342 },
343 { NULL }
344 };
345
346 static const AVFilterPad outputs[] = {
347 {
348 .name = "default",
349 .type = AVMEDIA_TYPE_VIDEO,
350 .config_props = config_output,
351 },
352 { NULL }
353 };
354
355 AVFilter ff_vf_threshold = {
356 .name = "threshold",
357 .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
358 .priv_size = sizeof(ThresholdContext),
359 .priv_class = &threshold_class,
360 .uninit = uninit,
361 .query_formats = query_formats,
362 .activate = activate,
363 .inputs = inputs,
364 .outputs = outputs,
365 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
366 };
367