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 saved_plot;
73  int is_16bit;
74  int depth;
75  int parsed_psfile;
76 
77  int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
78 } CurvesContext;
79 
80 typedef struct ThreadData {
81  AVFrame *in, *out;
82 } ThreadData;
83 
84 #define OFFSET(x) offsetof(CurvesContext, x)
85 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
86 static const AVOption curves_options[] = {
87  { "preset", "select a color curves preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=PRESET_NONE}, PRESET_NONE, NB_PRESETS-1, FLAGS, "preset_name" },
88  { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NONE}, 0, 0, FLAGS, "preset_name" },
89  { "color_negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_COLOR_NEGATIVE}, 0, 0, FLAGS, "preset_name" },
90  { "cross_process", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_CROSS_PROCESS}, 0, 0, FLAGS, "preset_name" },
91  { "darker", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_DARKER}, 0, 0, FLAGS, "preset_name" },
92  { "increase_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_INCREASE_CONTRAST}, 0, 0, FLAGS, "preset_name" },
93  { "lighter", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LIGHTER}, 0, 0, FLAGS, "preset_name" },
94  { "linear_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LINEAR_CONTRAST}, 0, 0, FLAGS, "preset_name" },
95  { "medium_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_MEDIUM_CONTRAST}, 0, 0, FLAGS, "preset_name" },
96  { "negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NEGATIVE}, 0, 0, FLAGS, "preset_name" },
97  { "strong_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_STRONG_CONTRAST}, 0, 0, FLAGS, "preset_name" },
98  { "vintage", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_VINTAGE}, 0, 0, FLAGS, "preset_name" },
99  { "master","set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
100  { "m", "set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
101  { "red", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
102  { "r", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
103  { "green", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
104  { "g", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
105  { "blue", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
106  { "b", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
107  { "all", "set points coordinates for all components", OFFSET(comp_points_str_all), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
108  { "psfile", "set Photoshop curves file name", OFFSET(psfile), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
109  { "plot", "save Gnuplot script of the curves in specified file", OFFSET(plot_filename), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
110  { NULL }
111 };
112 
113 AVFILTER_DEFINE_CLASS(curves);
114 
115 static const struct {
116  const char *r;
117  const char *g;
118  const char *b;
119  const char *master;
120 } curves_presets[] = {
121  [PRESET_COLOR_NEGATIVE] = {
122  "0.129/1 0.466/0.498 0.725/0",
123  "0.109/1 0.301/0.498 0.517/0",
124  "0.098/1 0.235/0.498 0.423/0",
125  },
126  [PRESET_CROSS_PROCESS] = {
127  "0/0 0.25/0.156 0.501/0.501 0.686/0.745 1/1",
128  "0/0 0.25/0.188 0.38/0.501 0.745/0.815 1/0.815",
129  "0/0 0.231/0.094 0.709/0.874 1/1",
130  },
131  [PRESET_DARKER] = { .master = "0/0 0.5/0.4 1/1" },
132  [PRESET_INCREASE_CONTRAST] = { .master = "0/0 0.149/0.066 0.831/0.905 0.905/0.98 1/1" },
133  [PRESET_LIGHTER] = { .master = "0/0 0.4/0.5 1/1" },
134  [PRESET_LINEAR_CONTRAST] = { .master = "0/0 0.305/0.286 0.694/0.713 1/1" },
135  [PRESET_MEDIUM_CONTRAST] = { .master = "0/0 0.286/0.219 0.639/0.643 1/1" },
136  [PRESET_NEGATIVE] = { .master = "0/1 1/0" },
137  [PRESET_STRONG_CONTRAST] = { .master = "0/0 0.301/0.196 0.592/0.6 0.686/0.737 1/1" },
138  [PRESET_VINTAGE] = {
139  "0/0.11 0.42/0.51 1/0.95",
140  "0/0 0.50/0.48 1/1",
141  "0/0.22 0.49/0.44 1/0.8",
142  }
143 };
144 
145 static struct keypoint *make_point(double x, double y, struct keypoint *next)
146 {
147  struct keypoint *point = av_mallocz(sizeof(*point));
148 
149  if (!point)
150  return NULL;
151  point->x = x;
152  point->y = y;
153  point->next = next;
154  return point;
155 }
156 
157 static int parse_points_str(AVFilterContext *ctx, struct keypoint **points, const char *s,
158  int lut_size)
159 {
160  char *p = (char *)s; // strtod won't alter the string
161  struct keypoint *last = NULL;
162  const int scale = lut_size - 1;
163 
164  /* construct a linked list based on the key points string */
165  while (p && *p) {
166  struct keypoint *point = make_point(0, 0, NULL);
167  if (!point)
168  return AVERROR(ENOMEM);
169  point->x = av_strtod(p, &p); if (p && *p) p++;
170  point->y = av_strtod(p, &p); if (p && *p) p++;
171  if (point->x < 0 || point->x > 1 || point->y < 0 || point->y > 1) {
172  av_log(ctx, AV_LOG_ERROR, "Invalid key point coordinates (%f;%f), "
173  "x and y must be in the [0;1] range.\n", point->x, point->y);
174  return AVERROR(EINVAL);
175  }
176  if (!*points)
177  *points = point;
178  if (last) {
179  if ((int)(last->x * scale) >= (int)(point->x * scale)) {
180  av_log(ctx, AV_LOG_ERROR, "Key point coordinates (%f;%f) "
181  "and (%f;%f) are too close from each other or not "
182  "strictly increasing on the x-axis\n",
183  last->x, last->y, point->x, point->y);
184  return AVERROR(EINVAL);
185  }
186  last->next = point;
187  }
188  last = point;
189  }
190 
191  if (*points && !(*points)->next) {
192  av_log(ctx, AV_LOG_WARNING, "Only one point (at (%f;%f)) is defined, "
193  "this is unlikely to behave as you expect. You probably want"
194  "at least 2 points.",
195  (*points)->x, (*points)->y);
196  }
197 
198  return 0;
199 }
200 
201 static int get_nb_points(const struct keypoint *d)
202 {
203  int n = 0;
204  while (d) {
205  n++;
206  d = d->next;
207  }
208  return n;
209 }
210 
211 /**
212  * Natural cubic spline interpolation
213  * Finding curves using Cubic Splines notes by Steven Rauch and John Stockie.
214  * @see http://people.math.sfu.ca/~stockie/teaching/macm316/notes/splines.pdf
215  */
216 
217 #define CLIP(v) (nbits == 8 ? av_clip_uint8(v) : av_clip_uintp2_c(v, nbits))
218 
219 static inline int interpolate(void *log_ctx, uint16_t *y,
220  const struct keypoint *points, int nbits)
221 {
222  int i, ret = 0;
223  const struct keypoint *point = points;
224  double xprev = 0;
225  const int lut_size = 1<<nbits;
226  const int scale = lut_size - 1;
227 
228  double (*matrix)[3];
229  double *h, *r;
230  const int n = get_nb_points(points); // number of splines
231 
232  if (n == 0) {
233  for (i = 0; i < lut_size; i++)
234  y[i] = i;
235  return 0;
236  }
237 
238  if (n == 1) {
239  for (i = 0; i < lut_size; i++)
240  y[i] = CLIP(point->y * scale);
241  return 0;
242  }
243 
244  matrix = av_calloc(n, sizeof(*matrix));
245  h = av_malloc((n - 1) * sizeof(*h));
246  r = av_calloc(n, sizeof(*r));
247 
248  if (!matrix || !h || !r) {
249  ret = AVERROR(ENOMEM);
250  goto end;
251  }
252 
253  /* h(i) = x(i+1) - x(i) */
254  i = -1;
255  for (point = points; point; point = point->next) {
256  if (i != -1)
257  h[i] = point->x - xprev;
258  xprev = point->x;
259  i++;
260  }
261 
262  /* right-side of the polynomials, will be modified to contains the solution */
263  point = points;
264  for (i = 1; i < n - 1; i++) {
265  const double yp = point->y;
266  const double yc = point->next->y;
267  const double yn = point->next->next->y;
268  r[i] = 6 * ((yn-yc)/h[i] - (yc-yp)/h[i-1]);
269  point = point->next;
270  }
271 
272 #define BD 0 /* sub diagonal (below main) */
273 #define MD 1 /* main diagonal (center) */
274 #define AD 2 /* sup diagonal (above main) */
275 
276  /* left side of the polynomials into a tridiagonal matrix. */
277  matrix[0][MD] = matrix[n - 1][MD] = 1;
278  for (i = 1; i < n - 1; i++) {
279  matrix[i][BD] = h[i-1];
280  matrix[i][MD] = 2 * (h[i-1] + h[i]);
281  matrix[i][AD] = h[i];
282  }
283 
284  /* tridiagonal solving of the linear system */
285  for (i = 1; i < n; i++) {
286  const double den = matrix[i][MD] - matrix[i][BD] * matrix[i-1][AD];
287  const double k = den ? 1./den : 1.;
288  matrix[i][AD] *= k;
289  r[i] = (r[i] - matrix[i][BD] * r[i - 1]) * k;
290  }
291  for (i = n - 2; i >= 0; i--)
292  r[i] = r[i] - matrix[i][AD] * r[i + 1];
293 
294  point = points;
295 
296  /* left padding */
297  for (i = 0; i < (int)(point->x * scale); i++)
298  y[i] = CLIP(point->y * scale);
299 
300  /* compute the graph with x=[x0..xN] */
301  i = 0;
302  av_assert0(point->next); // always at least 2 key points
303  while (point->next) {
304  const double yc = point->y;
305  const double yn = point->next->y;
306 
307  const double a = yc;
308  const double b = (yn-yc)/h[i] - h[i]*r[i]/2. - h[i]*(r[i+1]-r[i])/6.;
309  const double c = r[i] / 2.;
310  const double d = (r[i+1] - r[i]) / (6.*h[i]);
311 
312  int x;
313  const int x_start = point->x * scale;
314  const int x_end = point->next->x * scale;
315 
316  av_assert0(x_start >= 0 && x_start < lut_size &&
317  x_end >= 0 && x_end < lut_size);
318 
319  for (x = x_start; x <= x_end; x++) {
320  const double xx = (x - x_start) * 1./scale;
321  const double yy = a + b*xx + c*xx*xx + d*xx*xx*xx;
322  y[x] = CLIP(yy * scale);
323  av_log(log_ctx, AV_LOG_DEBUG, "f(%f)=%f -> y[%d]=%d\n", xx, yy, x, y[x]);
324  }
325 
326  point = point->next;
327  i++;
328  }
329 
330  /* right padding */
331  for (i = (int)(point->x * scale); i < lut_size; i++)
332  y[i] = CLIP(point->y * scale);
333 
334 end:
335  av_free(matrix);
336  av_free(h);
337  av_free(r);
338  return ret;
339 }
340 
341 #define DECLARE_INTERPOLATE_FUNC(nbits) \
342 static int interpolate##nbits(void *log_ctx, uint16_t *y, \
343  const struct keypoint *points) \
344 { \
345  return interpolate(log_ctx, y, points, nbits); \
346 }
347 
348 DECLARE_INTERPOLATE_FUNC(8)
349 DECLARE_INTERPOLATE_FUNC(9)
350 DECLARE_INTERPOLATE_FUNC(10)
351 DECLARE_INTERPOLATE_FUNC(12)
352 DECLARE_INTERPOLATE_FUNC(14)
353 DECLARE_INTERPOLATE_FUNC(16)
354 
355 static int parse_psfile(AVFilterContext *ctx, const char *fname)
356 {
357  CurvesContext *curves = ctx->priv;
358  uint8_t *buf;
359  size_t size;
360  int i, ret, av_unused(version), nb_curves;
361  AVBPrint ptstr;
362  static const int comp_ids[] = {3, 0, 1, 2};
363 
364  av_bprint_init(&ptstr, 0, AV_BPRINT_SIZE_AUTOMATIC);
365 
366  ret = av_file_map(fname, &buf, &size, 0, NULL);
367  if (ret < 0)
368  return ret;
369 
370 #define READ16(dst) do { \
371  if (size < 2) { \
372  ret = AVERROR_INVALIDDATA; \
373  goto end; \
374  } \
375  dst = AV_RB16(buf); \
376  buf += 2; \
377  size -= 2; \
378 } while (0)
379 
380  READ16(version);
381  READ16(nb_curves);
382  for (i = 0; i < FFMIN(nb_curves, FF_ARRAY_ELEMS(comp_ids)); i++) {
383  int nb_points, n;
384  av_bprint_clear(&ptstr);
385  READ16(nb_points);
386  for (n = 0; n < nb_points; n++) {
387  int y, x;
388  READ16(y);
389  READ16(x);
390  av_bprintf(&ptstr, "%f/%f ", x / 255., y / 255.);
391  }
392  if (*ptstr.str) {
393  char **pts = &curves->comp_points_str[comp_ids[i]];
394  if (!*pts) {
395  *pts = av_strdup(ptstr.str);
396  av_log(ctx, AV_LOG_DEBUG, "curves %d (intid=%d) [%d points]: [%s]\n",
397  i, comp_ids[i], nb_points, *pts);
398  if (!*pts) {
399  ret = AVERROR(ENOMEM);
400  goto end;
401  }
402  }
403  }
404  }
405 end:
406  av_bprint_finalize(&ptstr, NULL);
407  av_file_unmap(buf, size);
408  return ret;
409 }
410 
411 static int dump_curves(const char *fname, uint16_t *graph[NB_COMP + 1],
412  struct keypoint *comp_points[NB_COMP + 1],
413  int lut_size)
414 {
415  int i;
416  AVBPrint buf;
417  const double scale = 1. / (lut_size - 1);
418  static const char * const colors[] = { "red", "green", "blue", "#404040", };
419  FILE *f = av_fopen_utf8(fname, "w");
420 
421  av_assert0(FF_ARRAY_ELEMS(colors) == NB_COMP + 1);
422 
423  if (!f) {
424  int ret = AVERROR(errno);
425  av_log(NULL, AV_LOG_ERROR, "Cannot open file '%s' for writing: %s\n",
426  fname, av_err2str(ret));
427  return ret;
428  }
429 
430  av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
431 
432  av_bprintf(&buf, "set xtics 0.1\n");
433  av_bprintf(&buf, "set ytics 0.1\n");
434  av_bprintf(&buf, "set size square\n");
435  av_bprintf(&buf, "set grid\n");
436 
437  for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
438  av_bprintf(&buf, "%s'-' using 1:2 with lines lc '%s' title ''",
439  i ? ", " : "plot ", colors[i]);
440  if (comp_points[i])
441  av_bprintf(&buf, ", '-' using 1:2 with points pointtype 3 lc '%s' title ''",
442  colors[i]);
443  }
444  av_bprintf(&buf, "\n");
445 
446  for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
447  int x;
448 
449  /* plot generated values */
450  for (x = 0; x < lut_size; x++)
451  av_bprintf(&buf, "%f %f\n", x * scale, graph[i][x] * scale);
452  av_bprintf(&buf, "e\n");
453 
454  /* plot user knots */
455  if (comp_points[i]) {
456  const struct keypoint *point = comp_points[i];
457 
458  while (point) {
459  av_bprintf(&buf, "%f %f\n", point->x, point->y);
460  point = point->next;
461  }
462  av_bprintf(&buf, "e\n");
463  }
464  }
465 
466  fwrite(buf.str, 1, buf.len, f);
467  fclose(f);
468  av_bprint_finalize(&buf, NULL);
469  return 0;
470 }
471 
472 static av_cold int curves_init(AVFilterContext *ctx)
473 {
474  int i, ret;
475  CurvesContext *curves = ctx->priv;
476  char **pts = curves->comp_points_str;
477  const char *allp = curves->comp_points_str_all;
478 
479  //if (!allp && curves->preset != PRESET_NONE && curves_presets[curves->preset].all)
480  // allp = curves_presets[curves->preset].all;
481 
482  if (allp) {
483  for (i = 0; i < NB_COMP; i++) {
484  if (!pts[i])
485  pts[i] = av_strdup(allp);
486  if (!pts[i])
487  return AVERROR(ENOMEM);
488  }
489  }
490 
491  if (curves->psfile && !curves->parsed_psfile) {
492  ret = parse_psfile(ctx, curves->psfile);
493  if (ret < 0)
494  return ret;
495  curves->parsed_psfile = 1;
496  }
497 
498  if (curves->preset != PRESET_NONE) {
499 #define SET_COMP_IF_NOT_SET(n, name) do { \
500  if (!pts[n] && curves_presets[curves->preset].name) { \
501  pts[n] = av_strdup(curves_presets[curves->preset].name); \
502  if (!pts[n]) \
503  return AVERROR(ENOMEM); \
504  } \
505 } while (0)
506  SET_COMP_IF_NOT_SET(0, r);
507  SET_COMP_IF_NOT_SET(1, g);
508  SET_COMP_IF_NOT_SET(2, b);
509  SET_COMP_IF_NOT_SET(3, master);
510  curves->preset = PRESET_NONE;
511  }
512 
513  return 0;
514 }
515 
516 static int query_formats(AVFilterContext *ctx)
517 {
518  static const enum AVPixelFormat pix_fmts[] = {
519  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
520  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
521  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
522  AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
523  AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
524  AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
525  AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
526  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
527  AV_PIX_FMT_GBRP9,
528  AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
529  AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
530  AV_PIX_FMT_GBRP14,
531  AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
532  AV_PIX_FMT_NONE
533  };
534  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
535  if (!fmts_list)
536  return AVERROR(ENOMEM);
537  return ff_set_common_formats(ctx, fmts_list);
538 }
539 
540 static int filter_slice_packed(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
541 {
542  int x, y;
543  const CurvesContext *curves = ctx->priv;
544  const ThreadData *td = arg;
545  const AVFrame *in = td->in;
546  const AVFrame *out = td->out;
547  const int direct = out == in;
548  const int step = curves->step;
549  const uint8_t r = curves->rgba_map[R];
550  const uint8_t g = curves->rgba_map[G];
551  const uint8_t b = curves->rgba_map[B];
552  const uint8_t a = curves->rgba_map[A];
553  const int slice_start = (in->height * jobnr ) / nb_jobs;
554  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
555 
556  if (curves->is_16bit) {
557  for (y = slice_start; y < slice_end; y++) {
558  uint16_t *dstp = ( uint16_t *)(out->data[0] + y * out->linesize[0]);
559  const uint16_t *srcp = (const uint16_t *)(in ->data[0] + y * in->linesize[0]);
560 
561  for (x = 0; x < in->width * step; x += step) {
562  dstp[x + r] = curves->graph[R][srcp[x + r]];
563  dstp[x + g] = curves->graph[G][srcp[x + g]];
564  dstp[x + b] = curves->graph[B][srcp[x + b]];
565  if (!direct && step == 4)
566  dstp[x + a] = srcp[x + a];
567  }
568  }
569  } else {
570  uint8_t *dst = out->data[0] + slice_start * out->linesize[0];
571  const uint8_t *src = in->data[0] + slice_start * in->linesize[0];
572 
573  for (y = slice_start; y < slice_end; y++) {
574  for (x = 0; x < in->width * step; x += step) {
575  dst[x + r] = curves->graph[R][src[x + r]];
576  dst[x + g] = curves->graph[G][src[x + g]];
577  dst[x + b] = curves->graph[B][src[x + b]];
578  if (!direct && step == 4)
579  dst[x + a] = src[x + a];
580  }
581  dst += out->linesize[0];
582  src += in ->linesize[0];
583  }
584  }
585  return 0;
586 }
587 
588 static int filter_slice_planar(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
589 {
590  int x, y;
591  const CurvesContext *curves = ctx->priv;
592  const ThreadData *td = arg;
593  const AVFrame *in = td->in;
594  const AVFrame *out = td->out;
595  const int direct = out == in;
596  const int step = curves->step;
597  const uint8_t r = curves->rgba_map[R];
598  const uint8_t g = curves->rgba_map[G];
599  const uint8_t b = curves->rgba_map[B];
600  const uint8_t a = curves->rgba_map[A];
601  const int slice_start = (in->height * jobnr ) / nb_jobs;
602  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
603 
604  if (curves->is_16bit) {
605  for (y = slice_start; y < slice_end; y++) {
606  uint16_t *dstrp = ( uint16_t *)(out->data[r] + y * out->linesize[r]);
607  uint16_t *dstgp = ( uint16_t *)(out->data[g] + y * out->linesize[g]);
608  uint16_t *dstbp = ( uint16_t *)(out->data[b] + y * out->linesize[b]);
609  uint16_t *dstap = ( uint16_t *)(out->data[a] + y * out->linesize[a]);
610  const uint16_t *srcrp = (const uint16_t *)(in ->data[r] + y * in->linesize[r]);
611  const uint16_t *srcgp = (const uint16_t *)(in ->data[g] + y * in->linesize[g]);
612  const uint16_t *srcbp = (const uint16_t *)(in ->data[b] + y * in->linesize[b]);
613  const uint16_t *srcap = (const uint16_t *)(in ->data[a] + y * in->linesize[a]);
614 
615  for (x = 0; x < in->width; x++) {
616  dstrp[x] = curves->graph[R][srcrp[x]];
617  dstgp[x] = curves->graph[G][srcgp[x]];
618  dstbp[x] = curves->graph[B][srcbp[x]];
619  if (!direct && step == 4)
620  dstap[x] = srcap[x];
621  }
622  }
623  } else {
624  uint8_t *dstr = out->data[r] + slice_start * out->linesize[r];
625  uint8_t *dstg = out->data[g] + slice_start * out->linesize[g];
626  uint8_t *dstb = out->data[b] + slice_start * out->linesize[b];
627  uint8_t *dsta = out->data[a] + slice_start * out->linesize[a];
628  const uint8_t *srcr = in->data[r] + slice_start * in->linesize[r];
629  const uint8_t *srcg = in->data[g] + slice_start * in->linesize[g];
630  const uint8_t *srcb = in->data[b] + slice_start * in->linesize[b];
631  const uint8_t *srca = in->data[a] + slice_start * in->linesize[a];
632 
633  for (y = slice_start; y < slice_end; y++) {
634  for (x = 0; x < in->width; x++) {
635  dstr[x] = curves->graph[R][srcr[x]];
636  dstg[x] = curves->graph[G][srcg[x]];
637  dstb[x] = curves->graph[B][srcb[x]];
638  if (!direct && step == 4)
639  dsta[x] = srca[x];
640  }
641  dstr += out->linesize[r];
642  dstg += out->linesize[g];
643  dstb += out->linesize[b];
644  dsta += out->linesize[a];
645  srcr += in ->linesize[r];
646  srcg += in ->linesize[g];
647  srcb += in ->linesize[b];
648  srca += in ->linesize[a];
649  }
650  }
651  return 0;
652 }
653 
654 static int config_input(AVFilterLink *inlink)
655 {
656  int i, j, ret;
657  AVFilterContext *ctx = inlink->dst;
658  CurvesContext *curves = ctx->priv;
659  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
660  char **pts = curves->comp_points_str;
661  struct keypoint *comp_points[NB_COMP + 1] = {0};
662 
663  ff_fill_rgba_map(curves->rgba_map, inlink->format);
664  curves->is_16bit = desc->comp[0].depth > 8;
665  curves->depth = desc->comp[0].depth;
666  curves->lut_size = 1 << curves->depth;
667  curves->step = av_get_padded_bits_per_pixel(desc) >> (3 + curves->is_16bit);
668  curves->filter_slice = desc->flags & AV_PIX_FMT_FLAG_PLANAR ? filter_slice_planar : filter_slice_packed;
669 
670  for (i = 0; i < NB_COMP + 1; i++) {
671  if (!curves->graph[i])
672  curves->graph[i] = av_mallocz_array(curves->lut_size, sizeof(*curves->graph[0]));
673  if (!curves->graph[i])
674  return AVERROR(ENOMEM);
675  ret = parse_points_str(ctx, comp_points + i, curves->comp_points_str[i], curves->lut_size);
676  if (ret < 0)
677  return ret;
678  switch (curves->depth) {
679  case 8: ret = interpolate8 (ctx, curves->graph[i], comp_points[i]); break;
680  case 9: ret = interpolate9 (ctx, curves->graph[i], comp_points[i]); break;
681  case 10: ret = interpolate10(ctx, curves->graph[i], comp_points[i]); break;
682  case 12: ret = interpolate12(ctx, curves->graph[i], comp_points[i]); break;
683  case 14: ret = interpolate14(ctx, curves->graph[i], comp_points[i]); break;
684  case 16: ret = interpolate16(ctx, curves->graph[i], comp_points[i]); break;
685  }
686  if (ret < 0)
687  return ret;
688  }
689 
690  if (pts[NB_COMP]) {
691  for (i = 0; i < NB_COMP; i++)
692  for (j = 0; j < curves->lut_size; j++)
693  curves->graph[i][j] = curves->graph[NB_COMP][curves->graph[i][j]];
694  }
695 
696  if (av_log_get_level() >= AV_LOG_VERBOSE) {
697  for (i = 0; i < NB_COMP; i++) {
698  const struct keypoint *point = comp_points[i];
699  av_log(ctx, AV_LOG_VERBOSE, "#%d points:", i);
700  while (point) {
701  av_log(ctx, AV_LOG_VERBOSE, " (%f;%f)", point->x, point->y);
702  point = point->next;
703  }
704  }
705  }
706 
707  if (curves->plot_filename && !curves->saved_plot) {
708  dump_curves(curves->plot_filename, curves->graph, comp_points, curves->lut_size);
709  curves->saved_plot = 1;
710  }
711 
712  for (i = 0; i < NB_COMP + 1; i++) {
713  struct keypoint *point = comp_points[i];
714  while (point) {
715  struct keypoint *next = point->next;
716  av_free(point);
717  point = next;
718  }
719  }
720 
721  return 0;
722 }
723 
724 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
725 {
726  AVFilterContext *ctx = inlink->dst;
727  CurvesContext *curves = ctx->priv;
728  AVFilterLink *outlink = ctx->outputs[0];
729  AVFrame *out;
730  ThreadData td;
731 
732  if (av_frame_is_writable(in)) {
733  out = in;
734  } else {
735  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
736  if (!out) {
737  av_frame_free(&in);
738  return AVERROR(ENOMEM);
739  }
740  av_frame_copy_props(out, in);
741  }
742 
743  td.in = in;
744  td.out = out;
745  ctx->internal->execute(ctx, curves->filter_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
746 
747  if (out != in)
748  av_frame_free(&in);
749 
750  return ff_filter_frame(outlink, out);
751 }
752 
753 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
754  char *res, int res_len, int flags)
755 {
756  CurvesContext *curves = ctx->priv;
757  int ret;
758 
759  if (!strcmp(cmd, "plot")) {
760  curves->saved_plot = 0;
761  } else if (!strcmp(cmd, "all") || !strcmp(cmd, "preset") || !strcmp(cmd, "psfile")) {
762  if (!strcmp(cmd, "psfile"))
763  curves->parsed_psfile = 0;
764  av_freep(&curves->comp_points_str_all);
765  av_freep(&curves->comp_points_str[0]);
766  av_freep(&curves->comp_points_str[1]);
767  av_freep(&curves->comp_points_str[2]);
768  av_freep(&curves->comp_points_str[NB_COMP]);
769  } else if (!strcmp(cmd, "red") || !strcmp(cmd, "r")) {
770  av_freep(&curves->comp_points_str[0]);
771  } else if (!strcmp(cmd, "green") || !strcmp(cmd, "g")) {
772  av_freep(&curves->comp_points_str[1]);
773  } else if (!strcmp(cmd, "blue") || !strcmp(cmd, "b")) {
774  av_freep(&curves->comp_points_str[2]);
775  } else if (!strcmp(cmd, "master") || !strcmp(cmd, "m")) {
776  av_freep(&curves->comp_points_str[NB_COMP]);
777  }
778 
779  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
780  if (ret < 0)
781  return ret;
782 
783  ret = curves_init(ctx);
784  if (ret < 0)
785  return ret;
786  return config_input(ctx->inputs[0]);
787 }
788 
789 static av_cold void curves_uninit(AVFilterContext *ctx)
790 {
791  int i;
792  CurvesContext *curves = ctx->priv;
793 
794  for (i = 0; i < NB_COMP + 1; i++)
795  av_freep(&curves->graph[i]);
796 }
797 
798 static const AVFilterPad curves_inputs[] = {
799  {
800  .name = "default",
801  .type = AVMEDIA_TYPE_VIDEO,
802  .filter_frame = filter_frame,
803  .config_props = config_input,
804  },
805  { NULL }
806 };
807 
808 static const AVFilterPad curves_outputs[] = {
809  {
810  .name = "default",
811  .type = AVMEDIA_TYPE_VIDEO,
812  },
813  { NULL }
814 };
815 
816 const AVFilter ff_vf_curves = {
817  .name = "curves",
818  .description = NULL_IF_CONFIG_SMALL("Adjust components curves."),
819  .priv_size = sizeof(CurvesContext),
820  .init = curves_init,
821  .uninit = curves_uninit,
822  .query_formats = query_formats,
823  .inputs = curves_inputs,
824  .outputs = curves_outputs,
825  .priv_class = &curves_class,
826  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
827  .process_command = process_command,
828 };
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:97
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:411
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AV_BPRINT_SIZE_UNLIMITED
#define AV_BPRINT_SIZE_UNLIMITED
direct
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
Definition: af_afir.c:61
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:31
PRESET_LIGHTER
@ PRESET_LIGHTER
Definition: vf_curves.c:52
r
const char * r
Definition: vf_curves.c:116
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:286
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:411
av_bprint_finalize
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:234
out
FILE * out
Definition: movenc.c:54
curves
static const Curve curves[]
Definition: vf_pseudocolor.c:138
av_bprint_init
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:68
keypoint::next
struct keypoint * next
Definition: vf_curves.c:41
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
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:85
CurvesContext::saved_plot
int saved_plot
Definition: vf_curves.c:72
PRESET_MEDIUM_CONTRAST
@ PRESET_MEDIUM_CONTRAST
Definition: vf_curves.c:54
av_unused
#define av_unused
Definition: attributes.h:131
graph
fg outputs[0] graph
Definition: ffmpeg_filter.c:174
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
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
AVFrame::width
int width
Definition: frame.h:361
DECLARE_INTERPOLATE_FUNC
#define DECLARE_INTERPOLATE_FUNC(nbits)
Definition: vf_curves.c:341
AVOption
AVOption.
Definition: opt.h:247
data
const char data[16]
Definition: mxf.c:143
CurvesContext
Definition: vf_curves.c:61
curves_inputs
static const AVFilterPad curves_inputs[]
Definition: vf_curves.c:798
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:196
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
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:149
BD
#define BD
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:502
get_nb_points
static int get_nb_points(const struct keypoint *d)
Definition: vf_curves.c:201
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:1565
curves_presets
static const struct @214 curves_presets[]
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
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:77
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:407
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:205
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:405
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:653
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:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
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
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:580
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:409
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:410
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_curves.c:753
g
const char * g
Definition: vf_curves.c:117
curves_outputs
static const AVFilterPad curves_outputs[]
Definition: vf_curves.c:808
keypoint
Definition: vf_curves.c:39
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2033
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:290
CLIP
#define CLIP(v)
Natural cubic spline interpolation Finding curves using Cubic Splines notes by Steven Rauch and John ...
Definition: vf_curves.c:217
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
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:73
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:144
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
arg
const char * arg
Definition: jacosubdec.c:67
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_curves.c:516
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:435
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:408
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:379
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
interpolate
static int interpolate(void *log_ctx, uint16_t *y, const struct keypoint *points, int nbits)
Definition: vf_curves.c:219
AV_PIX_FMT_BGR48
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:380
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:537
G
#define G
Definition: vf_curves.c:35
src
#define src
Definition: vp8dsp.c:255
CurvesContext::parsed_psfile
int parsed_psfile
Definition: vf_curves.c:75
AV_PIX_FMT_BGR0
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:230
CurvesContext::depth
int depth
Definition: vf_curves.c:74
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:404
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:118
PRESET_DARKER
@ PRESET_DARKER
Definition: vf_curves.c:50
eval.h
AD
#define AD
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:116
master
const char * master
Definition: vf_curves.c:119
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:2505
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:121
ff_vf_curves
const AVFilter ff_vf_curves
Definition: vf_curves.c:816
AV_PIX_FMT_RGB48
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:375
size
int size
Definition: twinvq_data.h:10344
curves_uninit
static av_cold void curves_uninit(AVFilterContext *ctx)
Definition: vf_curves.c:789
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:473
filter_slice_planar
static int filter_slice_planar(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:588
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:842
curves_options
static const AVOption curves_options[]
Definition: vf_curves.c:86
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:228
version
version
Definition: libkvazaar.c:307
filter_slice_packed
static int filter_slice_packed(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_curves.c:540
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:126
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
AV_PIX_FMT_BGRA64
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:384
bprint.h
i
int i
Definition: input.c:406
PRESET_NONE
@ PRESET_NONE
Definition: vf_curves.c:47
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:406
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:762
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
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:243
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:145
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:229
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:93
AVFrame::height
int height
Definition: frame.h:361
av_bprint_clear
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
Definition: bprint.c:226
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:251
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:224
avfilter.h
make_point
static struct keypoint * make_point(double x, double y, struct keypoint *next)
Definition: vf_curves.c:145
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:132
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_curves.c:654
file.h
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
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:117
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:259
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ThreadData::in
AVFrame * in
Definition: af_adenorm.c:223
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:69
curves_init
static av_cold int curves_init(AVFilterContext *ctx)
Definition: vf_curves.c:472
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:355
parse_points_str
static int parse_points_str(AVFilterContext *ctx, struct keypoint **points, const char *s, int lut_size)
Definition: vf_curves.c:157
ff_fill_rgba_map
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:33
d
d
Definition: ffmpeg_filter.c:156
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
AV_PIX_FMT_0RGB
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:227
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:228
drawutils.h
PRESET_STRONG_CONTRAST
@ PRESET_STRONG_CONTRAST
Definition: vf_curves.c:56
int
int
Definition: ffmpeg_filter.c:156
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
OFFSET
#define OFFSET(x)
Definition: vf_curves.c:84
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_curves.c:724
Generated on Fri Jul 30 2021 19:21:52 for FFmpeg by   doxygen 1.8.17