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_YUV440P10, AV_PIX_FMT_YUV444P10,
56 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV444P12,
57 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
58 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
59 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
60 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
61 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
62 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
63 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
64 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12 , AV_PIX_FMT_GBRAP16,
65 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
66 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
67 AV_PIX_FMT_NONE
68 };
69
70 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
71 }
72
73 typedef struct ThreadData {
74 AVFrame *in;
75 AVFrame *threshold;
76 AVFrame *min;
77 AVFrame *max;
78 AVFrame *out;
79 } ThreadData;
80
filter_slice(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)81 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
82 {
83 ThresholdContext *s = ctx->priv;
84 ThreadData *td = arg;
85 AVFrame *min = td->min;
86 AVFrame *max = td->max;
87 AVFrame *threshold = td->threshold;
88 AVFrame *in = td->in;
89 AVFrame *out = td->out;
90
91 for (int p = 0; p < s->nb_planes; p++) {
92 const int h = s->height[p];
93 const int slice_start = (h * jobnr) / nb_jobs;
94 const int slice_end = (h * (jobnr+1)) / nb_jobs;
95
96 if (!(s->planes & (1 << p))) {
97 av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
98 out->linesize[p],
99 in->data[p] + slice_start * in->linesize[p],
100 in->linesize[p],
101 s->width[p] * s->bpc,
102 slice_end - slice_start);
103 continue;
104 }
105 s->threshold(in->data[p] + slice_start * in->linesize[p],
106 threshold->data[p] + slice_start * threshold->linesize[p],
107 min->data[p] + slice_start * min->linesize[p],
108 max->data[p] + slice_start * max->linesize[p],
109 out->data[p] + slice_start * out->linesize[p],
110 in->linesize[p], threshold->linesize[p],
111 min->linesize[p], max->linesize[p],
112 out->linesize[p],
113 s->width[p], slice_end - slice_start);
114 }
115
116 return 0;
117 }
118
process_frame(FFFrameSync * fs)119 static int process_frame(FFFrameSync *fs)
120 {
121 AVFilterContext *ctx = fs->parent;
122 ThresholdContext *s = fs->opaque;
123 AVFilterLink *outlink = ctx->outputs[0];
124 AVFrame *out, *in, *threshold, *min, *max;
125 ThreadData td;
126 int ret;
127
128 if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
129 (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
130 (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
131 (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
132 return ret;
133
134 if (ctx->is_disabled) {
135 out = av_frame_clone(in);
136 if (!out)
137 return AVERROR(ENOMEM);
138 } else {
139 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
140 if (!out)
141 return AVERROR(ENOMEM);
142 av_frame_copy_props(out, in);
143
144 td.out = out;
145 td.in = in;
146 td.threshold = threshold;
147 td.min = min;
148 td.max = max;
149 ctx->internal->execute(ctx, filter_slice, &td, NULL,
150 FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
151 }
152
153 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
154
155 return ff_filter_frame(outlink, out);
156 }
157
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)158 static void threshold8(const uint8_t *in, const uint8_t *threshold,
159 const uint8_t *min, const uint8_t *max,
160 uint8_t *out,
161 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
162 ptrdiff_t flinesize, ptrdiff_t slinesize,
163 ptrdiff_t olinesize,
164 int w, int h)
165 {
166 int x, y;
167
168 for (y = 0; y < h; y++) {
169 for (x = 0; x < w; x++) {
170 out[x] = in[x] < threshold[x] ? min[x] : max[x];
171 }
172
173 in += ilinesize;
174 threshold += tlinesize;
175 min += flinesize;
176 max += slinesize;
177 out += olinesize;
178 }
179 }
180
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)181 static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
182 const uint8_t *ffirst, const uint8_t *ssecond,
183 uint8_t *oout,
184 ptrdiff_t ilinesize, ptrdiff_t tlinesize,
185 ptrdiff_t flinesize, ptrdiff_t slinesize,
186 ptrdiff_t olinesize,
187 int w, int h)
188 {
189 const uint16_t *in = (const uint16_t *)iin;
190 const uint16_t *threshold = (const uint16_t *)tthreshold;
191 const uint16_t *min = (const uint16_t *)ffirst;
192 const uint16_t *max = (const uint16_t *)ssecond;
193 uint16_t *out = (uint16_t *)oout;
194 int x, y;
195
196 for (y = 0; y < h; y++) {
197 for (x = 0; x < w; x++) {
198 out[x] = in[x] < threshold[x] ? min[x] : max[x];
199 }
200
201 in += ilinesize / 2;
202 threshold += tlinesize / 2;
203 min += flinesize / 2;
204 max += slinesize / 2;
205 out += olinesize / 2;
206 }
207 }
208
config_input(AVFilterLink * inlink)209 static int config_input(AVFilterLink *inlink)
210 {
211 AVFilterContext *ctx = inlink->dst;
212 ThresholdContext *s = ctx->priv;
213 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
214 int vsub, hsub;
215
216 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
217
218 hsub = desc->log2_chroma_w;
219 vsub = desc->log2_chroma_h;
220 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
221 s->height[0] = s->height[3] = inlink->h;
222 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
223 s->width[0] = s->width[3] = inlink->w;
224 s->depth = desc->comp[0].depth;
225
226 ff_threshold_init(s);
227
228 return 0;
229 }
230
ff_threshold_init(ThresholdContext * s)231 void ff_threshold_init(ThresholdContext *s)
232 {
233 if (s->depth == 8) {
234 s->threshold = threshold8;
235 s->bpc = 1;
236 } else {
237 s->threshold = threshold16;
238 s->bpc = 2;
239 }
240
241 if (ARCH_X86)
242 ff_threshold_init_x86(s);
243 }
244
config_output(AVFilterLink * outlink)245 static int config_output(AVFilterLink *outlink)
246 {
247 AVFilterContext *ctx = outlink->src;
248 ThresholdContext *s = ctx->priv;
249 AVFilterLink *base = ctx->inputs[0];
250 AVFilterLink *threshold = ctx->inputs[1];
251 AVFilterLink *min = ctx->inputs[2];
252 AVFilterLink *max = ctx->inputs[3];
253 FFFrameSyncIn *in;
254 int ret;
255
256 if (base->format != threshold->format ||
257 base->format != min->format ||
258 base->format != max->format) {
259 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
260 return AVERROR(EINVAL);
261 }
262 if (base->w != threshold->w ||
263 base->h != threshold->h ||
264 base->w != min->w ||
265 base->h != min->h ||
266 base->w != max->w ||
267 base->h != max->h) {
268 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
269 "(size %dx%d) do not match the corresponding "
270 "second input link %s parameters (%dx%d) "
271 "and/or third input link %s parameters (%dx%d) "
272 "and/or fourth input link %s parameters (%dx%d)\n",
273 ctx->input_pads[0].name, base->w, base->h,
274 ctx->input_pads[1].name, threshold->w, threshold->h,
275 ctx->input_pads[2].name, min->w, min->h,
276 ctx->input_pads[3].name, max->w, max->h);
277 return AVERROR(EINVAL);
278 }
279
280 outlink->w = base->w;
281 outlink->h = base->h;
282 outlink->sample_aspect_ratio = base->sample_aspect_ratio;
283 outlink->frame_rate = base->frame_rate;
284
285 if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
286 return ret;
287
288 in = s->fs.in;
289 in[0].time_base = base->time_base;
290 in[1].time_base = threshold->time_base;
291 in[2].time_base = min->time_base;
292 in[3].time_base = max->time_base;
293 in[0].sync = 1;
294 in[0].before = EXT_STOP;
295 in[0].after = EXT_STOP;
296 in[1].sync = 1;
297 in[1].before = EXT_STOP;
298 in[1].after = EXT_STOP;
299 in[2].sync = 1;
300 in[2].before = EXT_STOP;
301 in[2].after = EXT_STOP;
302 in[3].sync = 1;
303 in[3].before = EXT_STOP;
304 in[3].after = EXT_STOP;
305 s->fs.opaque = s;
306 s->fs.on_event = process_frame;
307
308 ret = ff_framesync_configure(&s->fs);
309 outlink->time_base = s->fs.time_base;
310
311 return ret;
312 }
313
activate(AVFilterContext * ctx)314 static int activate(AVFilterContext *ctx)
315 {
316 ThresholdContext *s = ctx->priv;
317 return ff_framesync_activate(&s->fs);
318 }
319
uninit(AVFilterContext * ctx)320 static av_cold void uninit(AVFilterContext *ctx)
321 {
322 ThresholdContext *s = ctx->priv;
323
324 ff_framesync_uninit(&s->fs);
325 }
326
327 static const AVFilterPad inputs[] = {
328 {
329 .name = "default",
330 .type = AVMEDIA_TYPE_VIDEO,
331 .config_props = config_input,
332 },
333 {
334 .name = "threshold",
335 .type = AVMEDIA_TYPE_VIDEO,
336 },
337 {
338 .name = "min",
339 .type = AVMEDIA_TYPE_VIDEO,
340 },
341 {
342 .name = "max",
343 .type = AVMEDIA_TYPE_VIDEO,
344 },
345 { NULL }
346 };
347
348 static const AVFilterPad outputs[] = {
349 {
350 .name = "default",
351 .type = AVMEDIA_TYPE_VIDEO,
352 .config_props = config_output,
353 },
354 { NULL }
355 };
356
357 AVFilter ff_vf_threshold = {
358 .name = "threshold",
359 .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
360 .priv_size = sizeof(ThresholdContext),
361 .priv_class = &threshold_class,
362 .uninit = uninit,
363 .query_formats = query_formats,
364 .activate = activate,
365 .inputs = inputs,
366 .outputs = outputs,
367 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
368 };
369