forked from FFmpeg/FFmpeg
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathvf_hsvkey.c
352 lines (299 loc) · 12.4 KB
/
vf_hsvkey.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/*
* Copyright (c) 2021 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
typedef struct HSVKeyContext {
const AVClass *class;
float hue, hue_opt, sat, val;
float similarity;
float blend;
float scale;
float half;
int depth;
int max;
int hsub_log2;
int vsub_log2;
int (*do_slice)(AVFilterContext *ctx, void *arg,
int jobnr, int nb_jobs);
} HSVKeyContext;
#define SQR(x) ((x)*(x))
static int do_hsvkey_pixel(HSVKeyContext *s, int y, int u, int v,
float hue_key, float sat_key, float val_key)
{
const float similarity = s->similarity;
const float scale = s->scale;
const float blend = s->blend;
const int imax = s->max;
const float max = imax;
const float half = s->half;
const float uf = u - half;
const float vf = v - half;
const float hue = hue_key < 0.f ? -hue_key : atan2f(uf, vf) + M_PI;
const float sat = sat_key < 0.f ? -sat_key : sqrtf((uf * uf + vf * vf) / (half * half * 2.f));
const float val = val_key < 0.f ? -val_key : scale * y;
float diff;
hue_key = fabsf(hue_key);
sat_key = fabsf(sat_key);
val_key = fabsf(val_key);
diff = sqrtf(fmaxf(SQR(sat) * SQR(val) +
SQR(sat_key) * SQR(val_key) -
2.f * sat * val * sat_key * val_key * cosf(hue_key - hue) +
SQR(val - val_key), 0.f));
if (diff < similarity) {
return 0;
} else if (blend > FLT_MIN) {
return av_clipf((diff - similarity) / blend, 0.f, 1.f) * max;
} else {
return imax;
}
return 0;
}
static int do_hsvkey_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
HSVKeyContext *s = avctx->priv;
AVFrame *frame = arg;
const int slice_start = (frame->height * jobnr) / nb_jobs;
const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs;
const int hsub_log2 = s->hsub_log2;
const int vsub_log2 = s->vsub_log2;
const float hue = s->hue;
const float sat = s->sat;
const float val = s->val;
for (int y = slice_start; y < slice_end; y++) {
for (int x = 0; x < frame->width; x++) {
int Y = frame->data[0][frame->linesize[0] * y + x];
int u = frame->data[1][frame->linesize[1] * (y >> vsub_log2) + (x >> hsub_log2)];
int v = frame->data[2][frame->linesize[2] * (y >> vsub_log2) + (x >> hsub_log2)];
frame->data[3][frame->linesize[3] * y + x] = do_hsvkey_pixel(s, Y, u, v, hue, sat, val);
}
}
return 0;
}
static int do_hsvkey16_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
HSVKeyContext *s = avctx->priv;
AVFrame *frame = arg;
const int slice_start = (frame->height * jobnr) / nb_jobs;
const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs;
const int hsub_log2 = s->hsub_log2;
const int vsub_log2 = s->vsub_log2;
const float hue = s->hue;
const float sat = s->sat;
const float val = s->val;
for (int y = slice_start; y < slice_end; ++y) {
for (int x = 0; x < frame->width; ++x) {
uint16_t *dst = (uint16_t *)(frame->data[3] + frame->linesize[3] * y);
int Y = AV_RN16(&frame->data[0][frame->linesize[0] * y + 2 * x]);
int u = AV_RN16(&frame->data[1][frame->linesize[1] * (y >> vsub_log2) + 2 * (x >> hsub_log2)]);
int v = AV_RN16(&frame->data[2][frame->linesize[2] * (y >> vsub_log2) + 2 * (x >> hsub_log2)]);
dst[x] = do_hsvkey_pixel(s, Y, u, v, hue, sat, val);
}
}
return 0;
}
static int do_hsvhold_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
HSVKeyContext *s = avctx->priv;
AVFrame *frame = arg;
const int hsub_log2 = s->hsub_log2;
const int vsub_log2 = s->vsub_log2;
const int width = frame->width >> hsub_log2;
const int height = frame->height >> vsub_log2;
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const float scale = s->scale;
const float hue = s->hue;
const float sat = s->sat;
const float val = s->val;
for (int y = slice_start; y < slice_end; ++y) {
for (int x = 0; x < width; ++x) {
uint8_t *dstu = frame->data[1] + frame->linesize[1] * y;
uint8_t *dstv = frame->data[2] + frame->linesize[2] * y;
int Y = frame->data[0][frame->linesize[0] * (y << vsub_log2) + (x << hsub_log2)];
int u = frame->data[1][frame->linesize[1] * y + x];
int v = frame->data[2][frame->linesize[2] * y + x];
int t = do_hsvkey_pixel(s, Y, u, v, hue, sat, val);
if (t > 0) {
float f = 1.f - t * scale;
dstu[x] = 128 + (u - 128) * f;
dstv[x] = 128 + (v - 128) * f;
}
}
}
return 0;
}
static int do_hsvhold16_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
HSVKeyContext *s = avctx->priv;
AVFrame *frame = arg;
const int hsub_log2 = s->hsub_log2;
const int vsub_log2 = s->vsub_log2;
const int width = frame->width >> hsub_log2;
const int height = frame->height >> vsub_log2;
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const float scale = s->scale;
const float half = s->half;
const float hue = s->hue;
const float sat = s->sat;
const float val = s->val;
for (int y = slice_start; y < slice_end; ++y) {
for (int x = 0; x < width; ++x) {
uint16_t *dstu = (uint16_t *)(frame->data[1] + frame->linesize[1] * y);
uint16_t *dstv = (uint16_t *)(frame->data[2] + frame->linesize[2] * y);
int Y = AV_RN16(&frame->data[0][frame->linesize[0] * (y << vsub_log2) + 2 * (x << hsub_log2)]);
int u = AV_RN16(&frame->data[1][frame->linesize[1] * y + 2 * x]);
int v = AV_RN16(&frame->data[2][frame->linesize[2] * y + 2 * x]);
int t = do_hsvkey_pixel(s, Y, u, v, hue, sat, val);
if (t > 0) {
float f = 1.f - t * scale;
dstu[x] = half + (u - half) * f;
dstv[x] = half + (v - half) * f;
}
}
}
return 0;
}
static int filter_frame(AVFilterLink *link, AVFrame *frame)
{
AVFilterContext *avctx = link->dst;
HSVKeyContext *s = avctx->priv;
int res;
s->hue = FFSIGN(s->hue_opt) *M_PI * fmodf(526.f - fabsf(s->hue_opt), 360.f) / 180.f;
if (res = ff_filter_execute(avctx, s->do_slice, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
return res;
return ff_filter_frame(avctx->outputs[0], frame);
}
static av_cold int config_output(AVFilterLink *outlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
AVFilterContext *avctx = outlink->src;
HSVKeyContext *s = avctx->priv;
s->depth = desc->comp[0].depth;
s->max = (1 << s->depth) - 1;
s->half = 0.5f * s->max;
s->scale = 1.f / s->max;
if (!strcmp(avctx->filter->name, "hsvkey")) {
s->do_slice = s->depth <= 8 ? do_hsvkey_slice : do_hsvkey16_slice;
} else {
s->do_slice = s->depth <= 8 ? do_hsvhold_slice: do_hsvhold16_slice;
}
return 0;
}
static av_cold int config_input(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
HSVKeyContext *s = avctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
s->hsub_log2 = desc->log2_chroma_w;
s->vsub_log2 = desc->log2_chroma_h;
return 0;
}
static const enum AVPixelFormat key_pixel_fmts[] = {
AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_NONE
};
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
#define OFFSET(x) offsetof(HSVKeyContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption hsvkey_options[] = {
{ "hue", "set the hue value", OFFSET(hue_opt), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -360, 360, FLAGS },
{ "sat", "set the saturation value", OFFSET(sat), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS },
{ "val", "set the value value", OFFSET(val), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS },
{ "similarity", "set the hsvkey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01}, 0.00001, 1.0, FLAGS },
{ "blend", "set the hsvkey blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(hsvkey);
const AVFilter ff_vf_hsvkey = {
.name = "hsvkey",
.description = NULL_IF_CONFIG_SMALL("Turns a certain HSV range into transparency. Operates on YUV colors."),
.priv_size = sizeof(HSVKeyContext),
.priv_class = &hsvkey_class,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(key_pixel_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};
static const enum AVPixelFormat hold_pixel_fmts[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_NONE
};
static const AVOption hsvhold_options[] = {
{ "hue", "set the hue value", OFFSET(hue_opt), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -360, 360, FLAGS },
{ "sat", "set the saturation value", OFFSET(sat), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS },
{ "val", "set the value value", OFFSET(val), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS },
{ "similarity", "set the hsvhold similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.00001, 1.0, FLAGS },
{ "blend", "set the hsvhold blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(hsvhold);
const AVFilter ff_vf_hsvhold = {
.name = "hsvhold",
.description = NULL_IF_CONFIG_SMALL("Turns a certain HSV range into gray."),
.priv_size = sizeof(HSVKeyContext),
.priv_class = &hsvhold_class,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(hold_pixel_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};