FFmpeg
vf_curves.c
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1 /*
2  * Copyright (c) 2013 Clément Bœsch
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 #include "libavutil/opt.h"
22 #include "libavutil/bprint.h"
23 #include "libavutil/eval.h"
24 #include "libavutil/file.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/pixdesc.h"
28 #include "avfilter.h"
29 #include "drawutils.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33 
34 #define R 0
35 #define G 1
36 #define B 2
37 #define A 3
38 
39 struct keypoint {
40  double x, y;
41  struct keypoint *next;
42 };
43 
44 #define NB_COMP 3
45 
46 enum preset {
47  PRESET_NONE,
48  PRESET_COLOR_NEGATIVE,
49  PRESET_CROSS_PROCESS,
50  PRESET_DARKER,
51  PRESET_INCREASE_CONTRAST,
52  PRESET_LIGHTER,
53  PRESET_LINEAR_CONTRAST,
54  PRESET_MEDIUM_CONTRAST,
55  PRESET_NEGATIVE,
56  PRESET_STRONG_CONTRAST,
57  PRESET_VINTAGE,
58  NB_PRESETS,
59 };
60 
61 typedef struct CurvesContext {
62  const AVClass *class;
63  int preset;
64  char *comp_points_str[NB_COMP + 1];
65  char *comp_points_str_all;
66  uint16_t *graph[NB_COMP + 1];
67  int lut_size;
68  char *psfile;
69  uint8_t rgba_map[4];
70  int step;
71  char *plot_filename;
72  int is_16bit;
73  int depth;
74 
75  int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
76 } CurvesContext;
77 
78 typedef struct ThreadData {
79  AVFrame *in, *out;
80 } ThreadData;
81 
82 #define OFFSET(x) offsetof(CurvesContext, x)
83 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
84 static const AVOption curves_options[] = {
85  { "preset", "select a color curves preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=PRESET_NONE}, PRESET_NONE, NB_PRESETS-1, FLAGS, "preset_name" },
86  { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NONE}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
87  { "color_negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_COLOR_NEGATIVE}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
88  { "cross_process", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_CROSS_PROCESS}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
89  { "darker", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_DARKER}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
90  { "increase_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_INCREASE_CONTRAST}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
91  { "lighter", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LIGHTER}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
92  { "linear_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LINEAR_CONTRAST}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
93  { "medium_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_MEDIUM_CONTRAST}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
94  { "negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NEGATIVE}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
95  { "strong_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_STRONG_CONTRAST}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
96  { "vintage", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_VINTAGE}, INT_MIN, INT_MAX, FLAGS, "preset_name" },
97  { "master","set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
98  { "m", "set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
99  { "red", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
100  { "r", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
101  { "green", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
102  { "g", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
103  { "blue", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
104  { "b", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
105  { "all", "set points coordinates for all components", OFFSET(comp_points_str_all), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
106  { "psfile", "set Photoshop curves file name", OFFSET(psfile), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
107  { "plot", "save Gnuplot script of the curves in specified file", OFFSET(plot_filename), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
108  { NULL }
109 };
110 
111 AVFILTER_DEFINE_CLASS(curves);
112 
113 static const struct {
114  const char *r;
115  const char *g;
116  const char *b;
117  const char *master;
118 } curves_presets[] = {
119  [PRESET_COLOR_NEGATIVE] = {
120  "0.129/1 0.466/0.498 0.725/0",
121  "0.109/1 0.301/0.498 0.517/0",
122  "0.098/1 0.235/0.498 0.423/0",
123  },
124  [PRESET_CROSS_PROCESS] = {
125  "0/0 0.25/0.156 0.501/0.501 0.686/0.745 1/1",
126  "0/0 0.25/0.188 0.38/0.501 0.745/0.815 1/0.815",
127  "0/0 0.231/0.094 0.709/0.874 1/1",
128  },
129  [PRESET_DARKER] = { .master = "0/0 0.5/0.4 1/1" },
130  [PRESET_INCREASE_CONTRAST] = { .master = "0/0 0.149/0.066 0.831/0.905 0.905/0.98 1/1" },
131  [PRESET_LIGHTER] = { .master = "0/0 0.4/0.5 1/1" },
132  [PRESET_LINEAR_CONTRAST] = { .master = "0/0 0.305/0.286 0.694/0.713 1/1" },
133  [PRESET_MEDIUM_CONTRAST] = { .master = "0/0 0.286/0.219 0.639/0.643 1/1" },
134  [PRESET_NEGATIVE] = { .master = "0/1 1/0" },
135  [PRESET_STRONG_CONTRAST] = { .master = "0/0 0.301/0.196 0.592/0.6 0.686/0.737 1/1" },
136  [PRESET_VINTAGE] = {
137  "0/0.11 0.42/0.51 1/0.95",
138  "0/0 0.50/0.48 1/1",
139  "0/0.22 0.49/0.44 1/0.8",
140  }
141 };
142 
143 static struct keypoint *make_point(double x, double y, struct keypoint *next)
144 {
145  struct keypoint *point = av_mallocz(sizeof(*point));
146 
147  if (!point)
148  return NULL;
149  point->x = x;
150  point->y = y;
151  point->next = next;
152  return point;
153 }
154 
155 static int parse_points_str(AVFilterContext *ctx, struct keypoint **points, const char *s,
156  int lut_size)
157 {
158  char *p = (char *)s; // strtod won't alter the string
159  struct keypoint *last = NULL;
160  const int scale = lut_size - 1;
161 
162  /* construct a linked list based on the key points string */
163  while (p && *p) {
164  struct keypoint *point = make_point(0, 0, NULL);
165  if (!point)
166  return AVERROR(ENOMEM);
167  point->x = av_strtod(p, &p); if (p && *p) p++;
168  point->y = av_strtod(p, &p); if (p && *p) p++;
169  if (point->x < 0 || point->x > 1 || point->y < 0 || point->y > 1) {
170  av_log(ctx, AV_LOG_ERROR, "Invalid key point coordinates (%f;%f), "
171  "x and y must be in the [0;1] range.\n", point->x, point->y);
172  return AVERROR(EINVAL);
173  }
174  if (!*points)
175  *points = point;
176  if (last) {
177  if ((int)(last->x * scale) >= (int)(point->x * scale)) {
178  av_log(ctx, AV_LOG_ERROR, "Key point coordinates (%f;%f) "
179  "and (%f;%f) are too close from each other or not "
180  "strictly increasing on the x-axis\n",
181  last->x, last->y, point->x, point->y);
182  return AVERROR(EINVAL);
183  }
184  last->next = point;
185  }
186  last = point;
187  }
188 
189  if (*points && !(*points)->next) {
190  av_log(ctx, AV_LOG_WARNING, "Only one point (at (%f;%f)) is defined, "
191  "this is unlikely to behave as you expect. You probably want"
192  "at least 2 points.",
193  (*points)->x, (*points)->y);
194  }
195 
196  return 0;
197 }
198 
199 static int get_nb_points(const struct keypoint *d)
200 {
201  int n = 0;
202  while (d) {
203  n++;
204  d = d->next;
205  }
206  return n;
207 }
208 
209 /**
210  * Natural cubic spline interpolation
211  * Finding curves using Cubic Splines notes by Steven Rauch and John Stockie.
212  * @see http://people.math.sfu.ca/~stockie/teaching/macm316/notes/splines.pdf
213  */
214 
215 #define CLIP(v) (nbits == 8 ? av_clip_uint8(v) : av_clip_uintp2_c(v, nbits))
216 
217 static inline int interpolate(void *log_ctx, uint16_t *y,
218  const struct keypoint *points, int nbits)
219 {
220  int i, ret = 0;
221  const struct keypoint *point = points;
222  double xprev = 0;
223  const int lut_size = 1<<nbits;
224  const int scale = lut_size - 1;
225 
226  double (*matrix)[3];
227  double *h, *r;
228  const int n = get_nb_points(points); // number of splines
229 
230  if (n == 0) {
231  for (i = 0; i < lut_size; i++)
232  y[i] = i;
233  return 0;
234  }
235 
236  if (n == 1) {
237  for (i = 0; i < lut_size; i++)
238  y[i] = CLIP(point->y * scale);
239  return 0;
240  }
241 
242  matrix = av_calloc(n, sizeof(*matrix));
243  h = av_malloc((n - 1) * sizeof(*h));
244  r = av_calloc(n, sizeof(*r));
245 
246  if (!matrix || !h || !r) {
247  ret = AVERROR(ENOMEM);
248  goto end;
249  }
250 
251  /* h(i) = x(i+1) - x(i) */
252  i = -1;
253  for (point = points; point; point = point->next) {
254  if (i != -1)
255  h[i] = point->x - xprev;
256  xprev = point->x;
257  i++;
258  }
259 
260  /* right-side of the polynomials, will be modified to contains the solution */
261  point = points;
262  for (i = 1; i < n - 1; i++) {
263  const double yp = point->y;
264  const double yc = point->next->y;
265  const double yn = point->next->next->y;
266  r[i] = 6 * ((yn-yc)/h[i] - (yc-yp)/h[i-1]);
267  point = point->next;
268  }
269 
270 #define BD 0 /* sub diagonal (below main) */
271 #define MD 1 /* main diagonal (center) */
272 #define AD 2 /* sup diagonal (above main) */
273 
274  /* left side of the polynomials into a tridiagonal matrix. */
275  matrix[0][MD] = matrix[n - 1][MD] = 1;
276  for (i = 1; i < n - 1; i++) {
277  matrix[i][BD] = h[i-1];
278  matrix[i][MD] = 2 * (h[i-1] + h[i]);
279  matrix[i][AD] = h[i];
280  }
281 
282  /* tridiagonal solving of the linear system */
283  for (i = 1; i < n; i++) {
284  const double den = matrix[i][MD] - matrix[i][BD] * matrix[i-1][AD];
285  const double k = den ? 1./den : 1.;
286  matrix[i][AD] *= k;
287  r[i] = (r[i] - matrix[i][BD] * r[i - 1]) * k;
288  }
289  for (i = n - 2; i >= 0; i--)
290  r[i] = r[i] - matrix[i][AD] * r[i + 1];
291 
292  point = points;
293 
294  /* left padding */
295  for (i = 0; i < (int)(point->x * scale); i++)
296  y[i] = CLIP(point->y * scale);
297 
298  /* compute the graph with x=[x0..xN] */
299  i = 0;
300  av_assert0(point->next); // always at least 2 key points
301  while (point->next) {
302  const double yc = point->y;
303  const double yn = point->next->y;
304 
305  const double a = yc;
306  const double b = (yn-yc)/h[i] - h[i]*r[i]/2. - h[i]*(r[i+1]-r[i])/6.;
307  const double c = r[i] / 2.;
308  const double d = (r[i+1] - r[i]) / (6.*h[i]);
309 
310  int x;
311  const int x_start = point->x * scale;
312  const int x_end = point->next->x * scale;
313 
314  av_assert0(x_start >= 0 && x_start < lut_size &&
315  x_end >= 0 && x_end < lut_size);
316 
317  for (x = x_start; x <= x_end; x++) {
318  const double xx = (x - x_start) * 1./scale;
319  const double yy = a + b*xx + c*xx*xx + d*xx*xx*xx;
320  y[x] = CLIP(yy * scale);
321  av_log(log_ctx, AV_LOG_DEBUG, "f(%f)=%f -> y[%d]=%d\n", xx, yy, x, y[x]);
322  }
323 
324  point = point->next;
325  i++;
326  }
327 
328  /* right padding */
329  for (i = (int)(point->x * scale); i < lut_size; i++)
330  y[i] = CLIP(point->y * scale);
331 
332 end:
333  av_free(matrix);
334  av_free(h);
335  av_free(r);
336  return ret;
337 }
338 
339 #define DECLARE_INTERPOLATE_FUNC(nbits) \
340 static int interpolate##nbits(void *log_ctx, uint16_t *y, \
341  const struct keypoint *points) \
342 { \
343  return interpolate(log_ctx, y, points, nbits); \
344 }
345 
346 DECLARE_INTERPOLATE_FUNC(8)
347 DECLARE_INTERPOLATE_FUNC(9)
348 DECLARE_INTERPOLATE_FUNC(10)
349 DECLARE_INTERPOLATE_FUNC(12)
350 DECLARE_INTERPOLATE_FUNC(14)
351 DECLARE_INTERPOLATE_FUNC(16)
352 
353 static int parse_psfile(AVFilterContext *ctx, const char *fname)
354 {
355  CurvesContext *curves = ctx->priv;
356  uint8_t *buf;
357  size_t size;
358  int i, ret, av_unused(version), nb_curves;
359  AVBPrint ptstr;
360  static const int comp_ids[] = {3, 0, 1, 2};
361 
362  av_bprint_init(&ptstr, 0, AV_BPRINT_SIZE_AUTOMATIC);
363 
364  ret = av_file_map(fname, &buf, &size, 0, NULL);
365  if (ret < 0)
366  return ret;
367 
368 #define READ16(dst) do { \
369  if (size < 2) { \
370  ret = AVERROR_INVALIDDATA; \
371  goto end; \
372  } \
373  dst = AV_RB16(buf); \
374  buf += 2; \
375  size -= 2; \
376 } while (0)
377 
378  READ16(version);
379  READ16(nb_curves);
380  for (i = 0; i < FFMIN(nb_curves, FF_ARRAY_ELEMS(comp_ids)); i++) {
381  int nb_points, n;
382  av_bprint_clear(&ptstr);
383  READ16(nb_points);
384  for (n = 0; n < nb_points; n++) {
385  int y, x;
386  READ16(y);
387  READ16(x);
388  av_bprintf(&ptstr, "%f/%f ", x / 255., y / 255.);
389  }
390  if (*ptstr.str) {
391  char **pts = &curves->comp_points_str[comp_ids[i]];
392  if (!*pts) {
393  *pts = av_strdup(ptstr.str);
394  av_log(ctx, AV_LOG_DEBUG, "curves %d (intid=%d) [%d points]: [%s]\n",
395  i, comp_ids[i], nb_points, *pts);
396  if (!*pts) {
397  ret = AVERROR(ENOMEM);
398  goto end;
399  }
400  }
401  }
402  }
403 end:
404  av_bprint_finalize(&ptstr, NULL);
405  av_file_unmap(buf, size);
406  return ret;
407 }
408 
409 static int dump_curves(const char *fname, uint16_t *graph[NB_COMP + 1],
410  struct keypoint *comp_points[NB_COMP + 1],
411  int lut_size)
412 {
413  int i;
414  AVBPrint buf;
415  const double scale = 1. / (lut_size - 1);
416  static const char * const colors[] = { "red", "green", "blue", "#404040", };
417  FILE *f = av_fopen_utf8(fname, "w");
418 
419  av_assert0(FF_ARRAY_ELEMS(colors) == NB_COMP + 1);
420 
421  if (!f) {
422  int ret = AVERROR(errno);
423  av_log(NULL, AV_LOG_ERROR, "Cannot open file '%s' for writing: %s\n",
424  fname, av_err2str(ret));
425  return ret;
426  }
427 
428  av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
429 
430  av_bprintf(&buf, "set xtics 0.1\n");
431  av_bprintf(&buf, "set ytics 0.1\n");
432  av_bprintf(&buf, "set size square\n");
433  av_bprintf(&buf, "set grid\n");
434 
435  for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
436  av_bprintf(&buf, "%s'-' using 1:2 with lines lc '%s' title ''",
437  i ? ", " : "plot ", colors[i]);
438  if (comp_points[i])
439  av_bprintf(&buf, ", '-' using 1:2 with points pointtype 3 lc '%s' title ''",
440  colors[i]);
441  }
442  av_bprintf(&buf, "\n");
443 
444  for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
445  int x;
446 
447  /* plot generated values */
448  for (x = 0; x < lut_size; x++)
449  av_bprintf(&buf, "%f %f\n", x * scale, graph[i][x] * scale);
450  av_bprintf(&buf, "e\n");
451 
452  /* plot user knots */
453  if (comp_points[i]) {
454  const struct keypoint *point = comp_points[i];
455 
456  while (point) {
457  av_bprintf(&buf, "%f %f\n", point->x, point->y);
458  point = point->next;
459  }
460  av_bprintf(&buf, "e\n");
461  }
462  }
463 
464  fwrite(buf.str, 1, buf.len, f);
465  fclose(f);
466  av_bprint_finalize(&buf, NULL);
467  return 0;
468 }
469 
470 static av_cold int curves_init(AVFilterContext *ctx)
471 {
472  int i, ret;
473  CurvesContext *curves = ctx->priv;
474  char **pts = curves->comp_points_str;
475  const char *allp = curves->comp_points_str_all;
476 
477  //if (!allp && curves->preset != PRESET_NONE && curves_presets[curves->preset].all)
478  // allp = curves_presets[curves->preset].all;
479 
480  if (allp) {
481  for (i = 0; i < NB_COMP; i++) {
482  if (!pts[i])
483  pts[i] = av_strdup(allp);
484  if (!pts[i])
485  return AVERROR(ENOMEM);
486  }
487  }
488 
489  if (curves->psfile) {
490  ret = parse_psfile(ctx, curves->psfile);
491  if (ret < 0)
492  return ret;
493  }
494 
495  if (curves->preset != PRESET_NONE) {
496 #define SET_COMP_IF_NOT_SET(n, name) do { \
497  if (!pts[n] && curves_presets[curves->preset].name) { \
498  pts[n] = av_strdup(curves_presets[curves->preset].name); \
499  if (!pts[n]) \
500  return AVERROR(ENOMEM); \
501  } \
502 } while (0)
503  SET_COMP_IF_NOT_SET(0, r);
504  SET_COMP_IF_NOT_SET(1, g);
505  SET_COMP_IF_NOT_SET(2, b);
506  SET_COMP_IF_NOT_SET(3, master);
507  }
508 
509  return 0;
510 }
511 
512 static int query_formats(AVFilterContext *ctx)
513 {
514  static const enum AVPixelFormat pix_fmts[] = {
515  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
516  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
517  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
518  AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
519  AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
520  AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
521  AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
522  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
523  AV_PIX_FMT_GBRP9,
524  AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
525  AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
526  AV_PIX_FMT_GBRP14,
527  AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
528  AV_PIX_FMT_NONE
529  };
530  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
531  if (!fmts_list)
532  return AVERROR(ENOMEM);
533  return ff_set_common_formats(ctx, fmts_list);
534 }
535 
536 static int filter_slice_packed(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
537 {
538  int x, y;
539  const CurvesContext *curves = ctx->priv;
540  const ThreadData *td = arg;
541  const AVFrame *in = td->in;
542  const AVFrame *out = td->out;
543  const int direct = out == in;
544  const int step = curves->step;
545  const uint8_t r = curves->rgba_map[R];
546  const uint8_t g = curves->rgba_map[G];
547  const uint8_t b = curves->rgba_map[B];
548  const uint8_t a = curves->rgba_map[A];
549  const int slice_start = (in->height * jobnr ) / nb_jobs;
550  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
551 
552  if (curves->is_16bit) {
553  for (y = slice_start; y < slice_end; y++) {
554  uint16_t *dstp = ( uint16_t *)(out->data[0] + y * out->linesize[0]);
555  const uint16_t *srcp = (const uint16_t *)(in ->data[0] + y * in->linesize[0]);
556 
557  for (x = 0; x < in->width * step; x += step) {
558  dstp[x + r] = curves->graph[R][srcp[x + r]];
559  dstp[x + g] = curves->graph[G][srcp[x + g]];
560  dstp[x + b] = curves->graph[B][srcp[x + b]];
561  if (!direct && step == 4)
562  dstp[x + a] = srcp[x + a];
563  }
564  }
565  } else {
566  uint8_t *dst = out->data[0] + slice_start * out->linesize[0];
567  const uint8_t *src = in->data[0] + slice_start * in->linesize[0];
568 
569  for (y = slice_start; y < slice_end; y++) {
570  for (x = 0; x < in->width * step; x += step) {
571  dst[x + r] = curves->graph[R][src[x + r]];
572  dst[x + g] = curves->graph[G][src[x + g]];
573  dst[x + b] = curves->graph[B][src[x + b]];
574  if (!direct && step == 4)
575  dst[x + a] = src[x + a];
576  }
577  dst += out->linesize[0];
578  src += in ->linesize[0];
579  }
580  }
581  return 0;
582 }
583 
584 static int filter_slice_planar(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
585 {
586  int x, y;
587  const CurvesContext *curves = ctx->priv;
588  const ThreadData *td = arg;
589  const AVFrame *in = td->in;
590  const AVFrame *out = td->out;
591  const int direct = out == in;
592  const int step = curves->step;
593  const uint8_t r = curves->rgba_map[R];
594  const uint8_t g = curves->rgba_map[G];
595  const uint8_t b = curves->rgba_map[B];
596  const uint8_t a = curves->rgba_map[A];
597  const int slice_start = (in->height * jobnr ) / nb_jobs;
598  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
599 
600  if (curves->is_16bit) {
601  for (y = slice_start; y < slice_end; y++) {
602  uint16_t *dstrp = ( uint16_t *)(out->data[r] + y * out->linesize[r]);
603  uint16_t *dstgp = ( uint16_t *)(out->data[g] + y * out->linesize[g]);
604  uint16_t *dstbp = ( uint16_t *)(out->data[b] + y * out->linesize[b]);
605  uint16_t *dstap = ( uint16_t *)(out->data[a] + y * out->linesize[a]);
606  const uint16_t *srcrp = (const uint16_t *)(in ->data[r] + y * in->linesize[r]);
607  const uint16_t *srcgp = (const uint16_t *)(in ->data[g] + y * in->linesize[g]);
608  const uint16_t *srcbp = (const uint16_t *)(in ->data[b] + y * in->linesize[b]);
609  const uint16_t *srcap = (const uint16_t *)(in ->data[a] + y * in->linesize[a]);
610 
611  for (x = 0; x < in->width; x++) {
612  dstrp[x] = curves->graph[R][srcrp[x]];
613  dstgp[x] = curves->graph[G][srcgp[x]];
614  dstbp[x] = curves->graph[B][srcbp[x]];
615  if (!direct && step == 4)
616  dstap[x] = srcap[x];
617  }
618  }
619  } else {
620  uint8_t *dstr = out->data[r] + slice_start * out->linesize[r];
621  uint8_t *dstg = out->data[g] + slice_start * out->linesize[g];
622  uint8_t *dstb = out->data[b] + slice_start * out->linesize[b];
623  uint8_t *dsta = out->data[a] + slice_start * out->linesize[a];
624  const uint8_t *srcr = in->data[r] + slice_start * in->linesize[r];
625  const uint8_t *srcg = in->data[g] + slice_start * in->linesize[g];
626  const uint8_t *srcb = in->data[b] + slice_start * in->linesize[b];
627  const uint8_t *srca = in->data[a] + slice_start * in->linesize[a];
628 
629  for (y = slice_start; y < slice_end; y++) {
630  for (x = 0; x < in->width; x++) {
631  dstr[x] = curves->graph[R][srcr[x]];
632  dstg[x] = curves->graph[G][srcg[x]];
633  dstb[x] = curves->graph[B][srcb[x]];
634  if (!direct && step == 4)
635  dsta[x] = srca[x];
636  }
637  dstr += out->linesize[r];
638  dstg += out->linesize[g];
639  dstb += out->linesize[b];
640  dsta += out->linesize[a];
641  srcr += in ->linesize[r];
642  srcg += in ->linesize[g];
643  srcb += in ->linesize[b];
644  srca += in ->linesize[a];
645  }
646  }
647  return 0;
648 }
649 
650 static int config_input(AVFilterLink *inlink)
651 {
652  int i, j, ret;
653  AVFilterContext *ctx = inlink->dst;
654  CurvesContext *curves = ctx->priv;
655  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
656  char **pts = curves->comp_points_str;
657  struct keypoint *comp_points[NB_COMP + 1] = {0};
658 
659  ff_fill_rgba_map(curves->rgba_map, inlink->format);
660  curves->is_16bit = desc->comp[0].depth > 8;
661  curves->depth = desc->comp[0].depth;
662  curves->lut_size = 1 << curves->depth;
663  curves->step = av_get_padded_bits_per_pixel(desc) >> (3 + curves->is_16bit);
664  curves->filter_slice = desc->flags & AV_PIX_FMT_FLAG_PLANAR ? filter_slice_planar : filter_slice_packed;
665 
666  for (i = 0; i < NB_COMP + 1; i++) {
667  curves->graph[i] = av_mallocz_array(curves->lut_size, sizeof(*curves->graph[0]));
668  if (!curves->graph[i])
669  return AVERROR(ENOMEM);
670  ret = parse_points_str(ctx, comp_points + i, curves->comp_points_str[i], curves->lut_size);
671  if (ret < 0)
672  return ret;
673  switch (curves->depth) {
674  case 8: ret = interpolate8 (ctx, curves->graph[i], comp_points[i]); break;
675  case 9: ret = interpolate9 (ctx, curves->graph[i], comp_points[i]); break;
676  case 10: ret = interpolate10(ctx, curves->graph[i], comp_points[i]); break;
677  case 12: ret = interpolate12(ctx, curves->graph[i], comp_points[i]); break;
678  case 14: ret = interpolate14(ctx, curves->graph[i], comp_points[i]); break;
679  case 16: ret = interpolate16(ctx, curves->graph[i], comp_points[i]); break;
680  }
681  if (ret < 0)
682  return ret;
683  }
684 
685  if (pts[NB_COMP]) {
686  for (i = 0; i < NB_COMP; i++)
687  for (j = 0; j < curves->lut_size; j++)
688  curves->graph[i][j] = curves->graph[NB_COMP][curves->graph[i][j]];
689  }
690 
691  if (av_log_get_level() >= AV_LOG_VERBOSE) {
692  for (i = 0; i < NB_COMP; i++) {
693  const struct keypoint *point = comp_points[i];
694  av_log(ctx, AV_LOG_VERBOSE, "#%d points:", i);
695  while (point) {
696  av_log(ctx, AV_LOG_VERBOSE, " (%f;%f)", point->x, point->y);
697  point = point->next;
698  }
699  }
700  }
701 
702  if (curves->plot_filename)
703  dump_curves(curves->plot_filename, curves->graph, comp_points, curves->lut_size);
704 
705  for (i = 0; i < NB_COMP + 1; i++) {
706  struct keypoint *point = comp_points[i];
707  while (point) {
708  struct keypoint *next = point->next;
709  av_free(point);
710  point = next;
711  }
712  }
713 
714  return 0;
715 }
716 
717 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
718 {
719  AVFilterContext *ctx = inlink->dst;
720  CurvesContext *curves = ctx->priv;
721  AVFilterLink *outlink = ctx->outputs[0];
722  AVFrame *out;
723  ThreadData td;
724 
725  if (av_frame_is_writable(in)) {
726  out = in;
727  } else {
728  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
729  if (!out) {
730  av_frame_free(&in);
731  return AVERROR(ENOMEM);
732  }
733  av_frame_copy_props(out, in);
734  }
735 
736  td.in = in;
737  td.out = out;
738  ctx->internal->execute(ctx, curves->filter_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
739 
740  if (out != in)
741  av_frame_free(&in);
742 
743  return ff_filter_frame(outlink, out);
744 }
745 
746 static av_cold void curves_uninit(AVFilterContext *ctx)
747 {
748  int i;
749  CurvesContext *curves = ctx->priv;
750 
751  for (i = 0; i < NB_COMP + 1; i++)
752  av_freep(&curves->graph[i]);
753 }
754 
755 static const AVFilterPad curves_inputs[] = {
756  {
757  .name = "default",
758  .type = AVMEDIA_TYPE_VIDEO,
759  .filter_frame = filter_frame,
760  .config_props = config_input,
761  },
762  { NULL }
763 };
764 
765 static const AVFilterPad curves_outputs[] = {
766  {
767  .name = "default",
768  .type = AVMEDIA_TYPE_VIDEO,
769  },
770  { NULL }
771 };
772 
773 AVFilter ff_vf_curves = {
774  .name = "curves",
775  .description = NULL_IF_CONFIG_SMALL("Adjust components curves."),
776  .priv_size = sizeof(CurvesContext),
777  .init = curves_init,
778  .uninit = curves_uninit,
779  .query_formats = query_formats,
780  .inputs = curves_inputs,
781  .outputs = curves_outputs,
782  .priv_class = &curves_class,
783  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
784 };
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:409
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AV_BPRINT_SIZE_UNLIMITED
#define AV_BPRINT_SIZE_UNLIMITED
CurvesContext::graph
uint16_t * graph[NB_COMP+1]
Definition: vf_curves.c:66
td
#define td
Definition: regdef.h:70
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
PRESET_CROSS_PROCESS
@ PRESET_CROSS_PROCESS
Definition: vf_curves.c:49
READ16
#define READ16(dst)
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
PRESET_LIGHTER
@ PRESET_LIGHTER
Definition: vf_curves.c:52
r
const char * r
Definition: vf_curves.c:114
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
CurvesContext::psfile
char * psfile
Definition: vf_curves.c:68
dump_curves
static int dump_curves(const char *fname, uint16_t *graph[NB_COMP+1], struct keypoint *comp_points[NB_COMP+1], int lut_size)
Definition: vf_curves.c:409
av_bprint_finalize
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
out
FILE * out
Definition: movenc.c:54
av_bprint_init
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
keypoint::next
struct keypoint * next
Definition: vf_curves.c:41
n
int n
Definition: avisynth_c.h:760
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
FLAGS
#define FLAGS
Definition: vf_curves.c:83
PRESET_MEDIUM_CONTRAST
@ PRESET_MEDIUM_CONTRAST
Definition: vf_curves.c:54
av_unused
#define av_unused
Definition: attributes.h:125
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
pixdesc.h
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
curves_presets
static const struct @224 curves_presets[]
DECLARE_INTERPOLATE_FUNC
#define DECLARE_INTERPOLATE_FUNC(nbits)
Definition: vf_curves.c:339
AVOption
AVOption.
Definition: opt.h:246
data
const char data[16]
Definition: mxf.c:91
CurvesContext
Definition: vf_curves.c:61
curves_inputs
static const AVFilterPad curves_inputs[]
Definition: vf_curves.c:755
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
AV_PIX_FMT_BGRA
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
BD
#define BD
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:488
get_nb_points
static int get_nb_points(const struct keypoint *d)
Definition: vf_curves.c:199
CurvesContext::rgba_map
uint8_t rgba_map[4]
Definition: vf_curves.c:69
video.h
AVFormatContext::internal
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1795
srcp
BYTE int const BYTE * srcp
Definition: avisynth_c.h:908
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
CurvesContext::filter_slice
int(* filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:75
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
A
#define A
Definition: vf_curves.c:37
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:405
dstp
BYTE * dstp
Definition: avisynth_c.h:908
av_file_map
int av_file_map(const char *filename, uint8_t **bufptr, size_t *size, int log_offset, void *log_ctx)
Read the file with name filename, and put its content in a newly allocated buffer or map it with mmap...
Definition: file.c:53
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
NB_PRESETS
@ NB_PRESETS
Definition: vf_curves.c:58
CurvesContext::preset
int preset
Definition: vf_curves.c:63
AV_BPRINT_SIZE_AUTOMATIC
#define AV_BPRINT_SIZE_AUTOMATIC
pts
static int64_t pts
Definition: transcode_aac.c:647
src
#define src
Definition: vp8dsp.c:254
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
preset
preset
Definition: vf_curves.c:46
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
buf
void * buf
Definition: avisynth_c.h:766
av_cold
#define av_cold
Definition: attributes.h:84
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
av_fopen_utf8
FILE * av_fopen_utf8(const char *path, const char *mode)
Open a file using a UTF-8 filename.
Definition: file_open.c:158
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:407
keypoint::x
double x
Definition: vf_curves.c:40
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:408
g
const char * g
Definition: vf_curves.c:115
curves_outputs
static const AVFilterPad curves_outputs[]
Definition: vf_curves.c:765
keypoint
Definition: vf_curves.c:39
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2026
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
CLIP
#define CLIP(v)
Natural cubic spline interpolation Finding curves using Cubic Splines notes by Steven Rauch and John ...
Definition: vf_curves.c:215
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(curves)
ctx
AVFormatContext * ctx
Definition: movenc.c:48
CurvesContext::lut_size
int lut_size
Definition: vf_curves.c:67
CurvesContext::is_16bit
int is_16bit
Definition: vf_curves.c:72
f
#define f(width, name)
Definition: cbs_vp9.c:255
av_file_unmap
void av_file_unmap(uint8_t *bufptr, size_t size)
Unmap or free the buffer bufptr created by av_file_map().
Definition: file.c:139
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
version
int version
Definition: avisynth_c.h:858
arg
const char * arg
Definition: jacosubdec.c:66
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_curves.c:512
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:380
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:406
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:377
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
interpolate
static int interpolate(void *log_ctx, uint16_t *y, const struct keypoint *points, int nbits)
Definition: vf_curves.c:217
AV_PIX_FMT_BGR48
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:378
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
G
#define G
Definition: vf_curves.c:35
AV_PIX_FMT_BGR0
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:240
CurvesContext::depth
int depth
Definition: vf_curves.c:73
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
AV_PIX_FMT_ABGR
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
MD
#define MD
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
b
const char * b
Definition: vf_curves.c:116
PRESET_DARKER
@ PRESET_DARKER
Definition: vf_curves.c:50
eval.h
AD
#define AD
desc
const char * desc
Definition: nvenc.c:68
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
master
const char * master
Definition: vf_curves.c:117
av_get_padded_bits_per_pixel
int av_get_padded_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel for the pixel format described by pixdesc, including any padding ...
Definition: pixdesc.c:2487
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AV_PIX_FMT_RGB48
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:373
size
int size
Definition: twinvq_data.h:11134
curves_uninit
static av_cold void curves_uninit(AVFilterContext *ctx)
Definition: vf_curves.c:746
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
filter_slice_planar
static int filter_slice_planar(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:584
curves_options
static const AVOption curves_options[]
Definition: vf_curves.c:84
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
AV_PIX_FMT_RGB0
@ AV_PIX_FMT_RGB0
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:238
filter_slice_packed
static int filter_slice_packed(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:536
CurvesContext::plot_filename
char * plot_filename
Definition: vf_curves.c:71
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
AV_PIX_FMT_ARGB
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
CurvesContext::comp_points_str
char * comp_points_str[NB_COMP+1]
Definition: vf_curves.c:64
PRESET_INCREASE_CONTRAST
@ PRESET_INCREASE_CONTRAST
Definition: vf_curves.c:51
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:326
AV_PIX_FMT_BGRA64
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:382
bprint.h
PRESET_NONE
@ PRESET_NONE
Definition: vf_curves.c:47
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
B
#define B
Definition: vf_curves.c:36
CurvesContext::step
int step
Definition: vf_curves.c:70
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:404
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
ThreadData
Used for passing data between threads.
Definition: af_adeclick.c:487
uint8_t
uint8_t
Definition: audio_convert.c:194
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
PRESET_VINTAGE
@ PRESET_VINTAGE
Definition: vf_curves.c:57
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
PRESET_COLOR_NEGATIVE
@ PRESET_COLOR_NEGATIVE
Definition: vf_curves.c:48
AVFilter
Filter definition.
Definition: avfilter.h:144
NB_COMP
#define NB_COMP
Definition: vf_curves.c:44
ret
ret
Definition: filter_design.txt:187
AV_PIX_FMT_0BGR
@ AV_PIX_FMT_0BGR
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:239
av_strtod
double av_strtod(const char *numstr, char **tail)
Parse the string in numstr and return its value as a double.
Definition: eval.c:106
R
#define R
Definition: vf_curves.c:34
CurvesContext::comp_points_str_all
char * comp_points_str_all
Definition: vf_curves.c:65
PRESET_NEGATIVE
@ PRESET_NEGATIVE
Definition: vf_curves.c:55
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:38
av_bprint_clear
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
Definition: bprint.c:227
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
PRESET_LINEAR_CONTRAST
@ PRESET_LINEAR_CONTRAST
Definition: vf_curves.c:53
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
avfilter.h
make_point
static struct keypoint * make_point(double x, double y, struct keypoint *next)
Definition: vf_curves.c:143
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_curves.c:650
ff_vf_curves
AVFilter ff_vf_curves
Definition: vf_curves.c:773
file.h
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ThreadData::in
AVFrame * in
Definition: af_afftdn.c:1082
SET_COMP_IF_NOT_SET
#define SET_COMP_IF_NOT_SET(n, name)
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
curves_init
static av_cold int curves_init(AVFilterContext *ctx)
Definition: vf_curves.c:470
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
keypoint::y
double y
Definition: vf_curves.c:40
parse_psfile
static int parse_psfile(AVFilterContext *ctx, const char *fname)
Definition: vf_curves.c:353
parse_points_str
static int parse_points_str(AVFilterContext *ctx, struct keypoint **points, const char *s, int lut_size)
Definition: vf_curves.c:155
ff_fill_rgba_map
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
AV_PIX_FMT_0RGB
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:237
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
uninit
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
h
h
Definition: vp9dsp_template.c:2038
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:227
drawutils.h
PRESET_STRONG_CONTRAST
@ PRESET_STRONG_CONTRAST
Definition: vf_curves.c:56
int
int
Definition: ffmpeg_filter.c:191
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:232
OFFSET
#define OFFSET(x)
Definition: vf_curves.c:82
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_curves.c:717
Generated on Wed Aug 24 2022 21:27:13 for FFmpeg by   doxygen 1.8.17