1 /*
2 * Copyright (c) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
3 * Copyright (c) 2016 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/imgutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "video.h"
29 #include "framesync.h"
30
31 #define OFFSET(x) offsetof(HysteresisContext, x)
32 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
33
34 typedef struct HysteresisContext {
35 const AVClass *class;
36 FFFrameSync fs;
37
38 int planes;
39 int threshold;
40
41 int width[4], height[4];
42 int nb_planes;
43 int depth;
44
45 uint8_t *map;
46 uint32_t *xy;
47 int index;
48
49 void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
50 ptrdiff_t blinesize, ptrdiff_t olinesize,
51 ptrdiff_t destlinesize,
52 int w, int h);
53 } HysteresisContext;
54
55 static const AVOption hysteresis_options[] = {
56 { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
57 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
58 { NULL }
59 };
60
query_formats(AVFilterContext * ctx)61 static int query_formats(AVFilterContext *ctx)
62 {
63 static const enum AVPixelFormat pix_fmts[] = {
64 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
65 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
66 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
67 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
68 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
69 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
70 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
71 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
72 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
73 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
74 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
75 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
76 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
77 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
78 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
79 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
80 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
81 AV_PIX_FMT_NONE
82 };
83
84 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
85 }
86
process_frame(FFFrameSync * fs)87 static int process_frame(FFFrameSync *fs)
88 {
89 AVFilterContext *ctx = fs->parent;
90 HysteresisContext *s = fs->opaque;
91 AVFilterLink *outlink = ctx->outputs[0];
92 AVFrame *out, *base, *alt;
93 int ret;
94
95 if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
96 (ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
97 return ret;
98
99 if (ctx->is_disabled) {
100 out = av_frame_clone(base);
101 if (!out)
102 return AVERROR(ENOMEM);
103 } else {
104 int p;
105
106 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
107 if (!out)
108 return AVERROR(ENOMEM);
109 av_frame_copy_props(out, base);
110
111 for (p = 0; p < s->nb_planes; p++) {
112 if (!((1 << p) & s->planes)) {
113 av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
114 s->width[p], s->height[p]);
115 continue;
116 } else {
117 int y;
118
119 for (y = 0; y < s->height[p]; y++) {
120 memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
121 }
122 }
123
124 s->index = -1;
125 memset(s->map, 0, s->width[0] * s->height[0]);
126 memset(s->xy, 0, s->width[0] * s->height[0] * 4);
127
128 s->hysteresis(s, base->data[p], alt->data[p],
129 out->data[p],
130 base->linesize[p], alt->linesize[p],
131 out->linesize[p],
132 s->width[p], s->height[p]);
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
passed(HysteresisContext * s,int x,int y,int w)140 static int passed(HysteresisContext *s, int x, int y, int w)
141 {
142 return s->map[x + y * w];
143 }
144
push(HysteresisContext * s,int x,int y,int w)145 static void push(HysteresisContext *s, int x, int y, int w)
146 {
147 s->map[x + y * w] = 0xff;
148 s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
149 }
150
pop(HysteresisContext * s,int * x,int * y)151 static void pop(HysteresisContext *s, int *x, int *y)
152 {
153 uint32_t val = s->xy[s->index--];
154
155 *x = val >> 16;
156 *y = val & 0x0000FFFF;
157 }
158
is_empty(HysteresisContext * s)159 static int is_empty(HysteresisContext *s)
160 {
161 return s->index < 0;
162 }
163
hysteresis8(HysteresisContext * s,const uint8_t * bsrc,const uint8_t * asrc,uint8_t * dst,ptrdiff_t blinesize,ptrdiff_t alinesize,ptrdiff_t dlinesize,int w,int h)164 static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
165 uint8_t *dst,
166 ptrdiff_t blinesize, ptrdiff_t alinesize,
167 ptrdiff_t dlinesize,
168 int w, int h)
169 {
170 const int t = s->threshold;
171 int x, y;
172
173 for (y = 0; y < h; y++) {
174 for (x = 0; x < w; x++) {
175 if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
176 int posx, posy;
177
178 dst[x + y * dlinesize] = asrc[x + y * alinesize];
179
180 push(s, x, y, w);
181
182 while (!is_empty(s)) {
183 int x_min, x_max, y_min, y_max, yy, xx;
184
185 pop(s, &posx, &posy);
186
187 x_min = posx > 0 ? posx - 1 : 0;
188 x_max = posx < w - 1 ? posx + 1 : posx;
189 y_min = posy > 0 ? posy - 1 : 0;
190 y_max = posy < h - 1 ? posy + 1 : posy;
191
192 for (yy = y_min; yy <= y_max; yy++) {
193 for (xx = x_min; xx <= x_max; xx++) {
194 if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
195 dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
196 push(s, xx, yy, w);
197 }
198 }
199 }
200 }
201 }
202 }
203 }
204 }
205
hysteresis16(HysteresisContext * s,const uint8_t * bbsrc,const uint8_t * aasrc,uint8_t * ddst,ptrdiff_t blinesize,ptrdiff_t alinesize,ptrdiff_t dlinesize,int w,int h)206 static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
207 uint8_t *ddst,
208 ptrdiff_t blinesize, ptrdiff_t alinesize,
209 ptrdiff_t dlinesize,
210 int w, int h)
211 {
212 const uint16_t *bsrc = (const uint16_t *)bbsrc;
213 const uint16_t *asrc = (const uint16_t *)aasrc;
214 uint16_t *dst = (uint16_t *)ddst;
215 const int t = s->threshold;
216 int x, y;
217
218 blinesize /= 2;
219 alinesize /= 2;
220 dlinesize /= 2;
221
222 for (y = 0; y < h; y++) {
223 for (x = 0; x < w; x++) {
224 if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
225 int posx, posy;
226
227 dst[x + y * dlinesize] = asrc[x + y * alinesize];
228
229 push(s, x, y, w);
230
231 while (!is_empty(s)) {
232 int x_min, x_max, y_min, y_max, yy, xx;
233
234 pop(s, &posx, &posy);
235
236 x_min = posx > 0 ? posx - 1 : 0;
237 x_max = posx < w - 1 ? posx + 1 : posx;
238 y_min = posy > 0 ? posy - 1 : 0;
239 y_max = posy < h - 1 ? posy + 1 : posy;
240
241 for (yy = y_min; yy <= y_max; yy++) {
242 for (xx = x_min; xx <= x_max; xx++) {
243 if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
244 dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
245 push(s, xx, yy, w);
246 }
247 }
248 }
249 }
250 }
251 }
252 }
253 }
254
config_input(AVFilterLink * inlink)255 static int config_input(AVFilterLink *inlink)
256 {
257 AVFilterContext *ctx = inlink->dst;
258 HysteresisContext *s = ctx->priv;
259 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
260 int vsub, hsub;
261
262 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
263
264 hsub = desc->log2_chroma_w;
265 vsub = desc->log2_chroma_h;
266 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
267 s->height[0] = s->height[3] = inlink->h;
268 s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
269 s->width[0] = s->width[3] = inlink->w;
270
271 s->depth = desc->comp[0].depth;
272
273 if (desc->comp[0].depth == 8)
274 s->hysteresis = hysteresis8;
275 else
276 s->hysteresis = hysteresis16;
277
278 s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
279 if (!s->map)
280 return AVERROR(ENOMEM);
281
282 s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
283 if (!s->xy)
284 return AVERROR(ENOMEM);
285
286 return 0;
287 }
288
config_output(AVFilterLink * outlink)289 static int config_output(AVFilterLink *outlink)
290 {
291 AVFilterContext *ctx = outlink->src;
292 HysteresisContext *s = ctx->priv;
293 AVFilterLink *base = ctx->inputs[0];
294 AVFilterLink *alt = ctx->inputs[1];
295 FFFrameSyncIn *in;
296 int ret;
297
298 if (base->format != alt->format) {
299 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
300 return AVERROR(EINVAL);
301 }
302 if (base->w != alt->w || base->h != alt->h) {
303 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
304 "(size %dx%d) do not match the corresponding "
305 "second input link %s parameters (size %dx%d)\n",
306 ctx->input_pads[0].name, base->w, base->h,
307 ctx->input_pads[1].name,
308 alt->w, alt->h);
309 return AVERROR(EINVAL);
310 }
311
312 outlink->w = base->w;
313 outlink->h = base->h;
314 outlink->sample_aspect_ratio = base->sample_aspect_ratio;
315 outlink->frame_rate = base->frame_rate;
316
317 if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
318 return ret;
319
320 in = s->fs.in;
321 in[0].time_base = base->time_base;
322 in[1].time_base = alt->time_base;
323 in[0].sync = 1;
324 in[0].before = EXT_STOP;
325 in[0].after = EXT_INFINITY;
326 in[1].sync = 1;
327 in[1].before = EXT_STOP;
328 in[1].after = EXT_INFINITY;
329 s->fs.opaque = s;
330 s->fs.on_event = process_frame;
331
332 ret = ff_framesync_configure(&s->fs);
333 outlink->time_base = s->fs.time_base;
334
335 return ret;
336 }
337
activate(AVFilterContext * ctx)338 static int activate(AVFilterContext *ctx)
339 {
340 HysteresisContext *s = ctx->priv;
341 return ff_framesync_activate(&s->fs);
342 }
343
uninit(AVFilterContext * ctx)344 static av_cold void uninit(AVFilterContext *ctx)
345 {
346 HysteresisContext *s = ctx->priv;
347
348 ff_framesync_uninit(&s->fs);
349 av_freep(&s->map);
350 av_freep(&s->xy);
351 }
352
353 FRAMESYNC_DEFINE_CLASS(hysteresis, HysteresisContext, fs);
354
355 static const AVFilterPad hysteresis_inputs[] = {
356 {
357 .name = "base",
358 .type = AVMEDIA_TYPE_VIDEO,
359 .config_props = config_input,
360 },
361 {
362 .name = "alt",
363 .type = AVMEDIA_TYPE_VIDEO,
364 },
365 { NULL }
366 };
367
368 static const AVFilterPad hysteresis_outputs[] = {
369 {
370 .name = "default",
371 .type = AVMEDIA_TYPE_VIDEO,
372 .config_props = config_output,
373 },
374 { NULL }
375 };
376
377 AVFilter ff_vf_hysteresis = {
378 .name = "hysteresis",
379 .description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
380 .preinit = hysteresis_framesync_preinit,
381 .priv_size = sizeof(HysteresisContext),
382 .uninit = uninit,
383 .query_formats = query_formats,
384 .activate = activate,
385 .inputs = hysteresis_inputs,
386 .outputs = hysteresis_outputs,
387 .priv_class = &hysteresis_class,
388 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
389 };
390