FFmpeg  4.3.8
vf_drawbox.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2008 Affine Systems, Inc (Michael Sullivan, Bobby Impollonia)
3  * Copyright (c) 2013 Andrey Utkin <andrey.krieger.utkin gmail com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Box and grid drawing filters. Also a nice template for a filter
25  * that needs to write in the input frame.
26  */
27 
28 #include "libavutil/colorspace.h"
29 #include "libavutil/common.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/eval.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/parseutils.h"
34 #include "avfilter.h"
35 #include "formats.h"
36 #include "internal.h"
37 #include "video.h"
38 
39 static const char *const var_names[] = {
40  "dar",
41  "hsub", "vsub",
42  "in_h", "ih", ///< height of the input video
43  "in_w", "iw", ///< width of the input video
44  "sar",
45  "x",
46  "y",
47  "h", ///< height of the rendered box
48  "w", ///< width of the rendered box
49  "t",
50  "fill",
51  NULL
52 };
53 
54 enum { Y, U, V, A };
55 
56 enum var_name {
69 };
70 
71 typedef struct DrawBoxContext {
72  const AVClass *class;
73  int x, y, w, h;
74  int thickness;
75  char *color_str;
76  unsigned char yuv_color[4];
77  int invert_color; ///< invert luma color
78  int vsub, hsub; ///< chroma subsampling
79  char *x_expr, *y_expr; ///< expression for x and y
80  char *w_expr, *h_expr; ///< expression for width and height
81  char *t_expr; ///< expression for thickness
83  int replace;
85 
86 static const int NUM_EXPR_EVALS = 5;
87 
89 {
90  DrawBoxContext *s = ctx->priv;
91  uint8_t rgba_color[4];
92 
93  if (!strcmp(s->color_str, "invert"))
94  s->invert_color = 1;
95  else if (av_parse_color(rgba_color, s->color_str, -1, ctx) < 0)
96  return AVERROR(EINVAL);
97 
98  if (!s->invert_color) {
99  s->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
100  s->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
101  s->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
102  s->yuv_color[A] = rgba_color[3];
103  }
104 
105  return 0;
106 }
107 
109 {
110  static const enum AVPixelFormat pix_fmts[] = {
117  };
118  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
119  if (!fmts_list)
120  return AVERROR(ENOMEM);
121  return ff_set_common_formats(ctx, fmts_list);
122 }
123 
124 static int config_input(AVFilterLink *inlink)
125 {
126  AVFilterContext *ctx = inlink->dst;
127  DrawBoxContext *s = ctx->priv;
129  double var_values[VARS_NB], res;
130  char *expr;
131  int ret;
132  int i;
133 
134  s->hsub = desc->log2_chroma_w;
135  s->vsub = desc->log2_chroma_h;
137 
138  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
139  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
140  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
141  var_values[VAR_DAR] = (double)inlink->w / inlink->h * var_values[VAR_SAR];
142  var_values[VAR_HSUB] = s->hsub;
143  var_values[VAR_VSUB] = s->vsub;
144  var_values[VAR_X] = NAN;
145  var_values[VAR_Y] = NAN;
146  var_values[VAR_H] = NAN;
147  var_values[VAR_W] = NAN;
148  var_values[VAR_T] = NAN;
149 
150  for (i = 0; i <= NUM_EXPR_EVALS; i++) {
151  /* evaluate expressions, fail on last iteration */
152  var_values[VAR_MAX] = inlink->w;
153  if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr),
154  var_names, var_values,
155  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
156  goto fail;
157  s->x = var_values[VAR_X] = res;
158 
159  var_values[VAR_MAX] = inlink->h;
160  if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr),
161  var_names, var_values,
162  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
163  goto fail;
164  s->y = var_values[VAR_Y] = res;
165 
166  var_values[VAR_MAX] = inlink->w - s->x;
167  if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
168  var_names, var_values,
169  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
170  goto fail;
171  s->w = var_values[VAR_W] = res;
172 
173  var_values[VAR_MAX] = inlink->h - s->y;
174  if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
175  var_names, var_values,
176  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
177  goto fail;
178  s->h = var_values[VAR_H] = res;
179 
180  var_values[VAR_MAX] = INT_MAX;
181  if ((ret = av_expr_parse_and_eval(&res, (expr = s->t_expr),
182  var_names, var_values,
183  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS)
184  goto fail;
185  s->thickness = var_values[VAR_T] = res;
186  }
187 
188  /* if w or h are zero, use the input w/h */
189  s->w = (s->w > 0) ? s->w : inlink->w;
190  s->h = (s->h > 0) ? s->h : inlink->h;
191 
192  /* sanity check width and height */
193  if (s->w < 0 || s->h < 0) {
194  av_log(ctx, AV_LOG_ERROR, "Size values less than 0 are not acceptable.\n");
195  return AVERROR(EINVAL);
196  }
197 
198  av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n",
199  s->x, s->y, s->w, s->h,
200  s->yuv_color[Y], s->yuv_color[U], s->yuv_color[V], s->yuv_color[A]);
201 
202  return 0;
203 
204 fail:
205  av_log(ctx, AV_LOG_ERROR,
206  "Error when evaluating the expression '%s'.\n",
207  expr);
208  return ret;
209 }
210 
212 {
213  return (y - s->y < s->thickness) || (s->y + s->h - 1 - y < s->thickness) ||
214  (x - s->x < s->thickness) || (s->x + s->w - 1 - x < s->thickness);
215 }
216 
217 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
218 {
219  DrawBoxContext *s = inlink->dst->priv;
220  int plane, x, y, xb = s->x, yb = s->y;
221  unsigned char *row[4];
222 
223  if (s->have_alpha && s->replace) {
224  for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
225  row[0] = frame->data[0] + y * frame->linesize[0];
226  row[3] = frame->data[3] + y * frame->linesize[3];
227 
228  for (plane = 1; plane < 3; plane++)
229  row[plane] = frame->data[plane] +
230  frame->linesize[plane] * (y >> s->vsub);
231 
232  if (s->invert_color) {
233  for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
234  if (pixel_belongs_to_box(s, x, y))
235  row[0][x] = 0xff - row[0][x];
236  } else {
237  for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
238  if (pixel_belongs_to_box(s, x, y)) {
239  row[0][x ] = s->yuv_color[Y];
240  row[1][x >> s->hsub] = s->yuv_color[U];
241  row[2][x >> s->hsub] = s->yuv_color[V];
242  row[3][x ] = s->yuv_color[A];
243  }
244  }
245  }
246  }
247  } else {
248  for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
249  row[0] = frame->data[0] + y * frame->linesize[0];
250 
251  for (plane = 1; plane < 3; plane++)
252  row[plane] = frame->data[plane] +
253  frame->linesize[plane] * (y >> s->vsub);
254 
255  if (s->invert_color) {
256  for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
257  if (pixel_belongs_to_box(s, x, y))
258  row[0][x] = 0xff - row[0][x];
259  } else {
260  for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
261  double alpha = (double)s->yuv_color[A] / 255;
262 
263  if (pixel_belongs_to_box(s, x, y)) {
264  row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y];
265  row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U];
266  row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V];
267  }
268  }
269  }
270  }
271  }
272 
273  return ff_filter_frame(inlink->dst->outputs[0], frame);
274 }
275 
276 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
277 {
278  AVFilterLink *inlink = ctx->inputs[0];
279  DrawBoxContext *s = ctx->priv;
280  int old_x = s->x;
281  int old_y = s->y;
282  int old_w = s->w;
283  int old_h = s->h;
284  int old_t = s->thickness;
285  int old_r = s->replace;
286  int ret;
287 
288  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
289  if (ret < 0)
290  return ret;
291 
292  ret = init(ctx);
293  if (ret < 0)
294  goto end;
295  ret = config_input(inlink);
296 end:
297  if (ret < 0) {
298  s->x = old_x;
299  s->y = old_y;
300  s->w = old_w;
301  s->h = old_h;
302  s->thickness = old_t;
303  s->replace = old_r;
304  }
305 
306  return ret;
307 }
308 
309 #define OFFSET(x) offsetof(DrawBoxContext, x)
310 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
311 
312 #if CONFIG_DRAWBOX_FILTER
313 
314 static const AVOption drawbox_options[] = {
315  { "x", "set horizontal position of the left box edge", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
316  { "y", "set vertical position of the top box edge", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
317  { "width", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
318  { "w", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
319  { "height", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
320  { "h", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
321  { "color", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
322  { "c", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
323  { "thickness", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, 0, 0, FLAGS },
324  { "t", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, 0, 0, FLAGS },
325  { "replace", "replace color & alpha", OFFSET(replace), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, FLAGS },
326  { NULL }
327 };
328 
329 AVFILTER_DEFINE_CLASS(drawbox);
330 
331 static const AVFilterPad drawbox_inputs[] = {
332  {
333  .name = "default",
334  .type = AVMEDIA_TYPE_VIDEO,
335  .config_props = config_input,
336  .filter_frame = filter_frame,
337  .needs_writable = 1,
338  },
339  { NULL }
340 };
341 
342 static const AVFilterPad drawbox_outputs[] = {
343  {
344  .name = "default",
345  .type = AVMEDIA_TYPE_VIDEO,
346  },
347  { NULL }
348 };
349 
351  .name = "drawbox",
352  .description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
353  .priv_size = sizeof(DrawBoxContext),
354  .priv_class = &drawbox_class,
355  .init = init,
357  .inputs = drawbox_inputs,
358  .outputs = drawbox_outputs,
361 };
362 #endif /* CONFIG_DRAWBOX_FILTER */
363 
364 #if CONFIG_DRAWGRID_FILTER
365 static av_pure av_always_inline int pixel_belongs_to_grid(DrawBoxContext *drawgrid, int x, int y)
366 {
367  // x is horizontal (width) coord,
368  // y is vertical (height) coord
369  int x_modulo;
370  int y_modulo;
371 
372  // Abstract from the offset
373  x -= drawgrid->x;
374  y -= drawgrid->y;
375 
376  x_modulo = x % drawgrid->w;
377  y_modulo = y % drawgrid->h;
378 
379  // If x or y got negative, fix values to preserve logics
380  if (x_modulo < 0)
381  x_modulo += drawgrid->w;
382  if (y_modulo < 0)
383  y_modulo += drawgrid->h;
384 
385  return x_modulo < drawgrid->thickness // Belongs to vertical line
386  || y_modulo < drawgrid->thickness; // Belongs to horizontal line
387 }
388 
389 static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame)
390 {
391  DrawBoxContext *drawgrid = inlink->dst->priv;
392  int plane, x, y;
393  uint8_t *row[4];
394 
395  if (drawgrid->have_alpha && drawgrid->replace) {
396  for (y = 0; y < frame->height; y++) {
397  row[0] = frame->data[0] + y * frame->linesize[0];
398  row[3] = frame->data[3] + y * frame->linesize[3];
399 
400  for (plane = 1; plane < 3; plane++)
401  row[plane] = frame->data[plane] +
402  frame->linesize[plane] * (y >> drawgrid->vsub);
403 
404  if (drawgrid->invert_color) {
405  for (x = 0; x < frame->width; x++)
406  if (pixel_belongs_to_grid(drawgrid, x, y))
407  row[0][x] = 0xff - row[0][x];
408  } else {
409  for (x = 0; x < frame->width; x++) {
410  if (pixel_belongs_to_grid(drawgrid, x, y)) {
411  row[0][x ] = drawgrid->yuv_color[Y];
412  row[1][x >> drawgrid->hsub] = drawgrid->yuv_color[U];
413  row[2][x >> drawgrid->hsub] = drawgrid->yuv_color[V];
414  row[3][x ] = drawgrid->yuv_color[A];
415  }
416  }
417  }
418  }
419  } else {
420  for (y = 0; y < frame->height; y++) {
421  row[0] = frame->data[0] + y * frame->linesize[0];
422 
423  for (plane = 1; plane < 3; plane++)
424  row[plane] = frame->data[plane] +
425  frame->linesize[plane] * (y >> drawgrid->vsub);
426 
427  if (drawgrid->invert_color) {
428  for (x = 0; x < frame->width; x++)
429  if (pixel_belongs_to_grid(drawgrid, x, y))
430  row[0][x] = 0xff - row[0][x];
431  } else {
432  for (x = 0; x < frame->width; x++) {
433  double alpha = (double)drawgrid->yuv_color[A] / 255;
434 
435  if (pixel_belongs_to_grid(drawgrid, x, y)) {
436  row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawgrid->yuv_color[Y];
437  row[1][x >> drawgrid->hsub] = (1 - alpha) * row[1][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[U];
438  row[2][x >> drawgrid->hsub] = (1 - alpha) * row[2][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[V];
439  }
440  }
441  }
442  }
443  }
444 
445  return ff_filter_frame(inlink->dst->outputs[0], frame);
446 }
447 
448 static const AVOption drawgrid_options[] = {
449  { "x", "set horizontal offset", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
450  { "y", "set vertical offset", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
451  { "width", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
452  { "w", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
453  { "height", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
454  { "h", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
455  { "color", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
456  { "c", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
457  { "thickness", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, 0, 0, FLAGS },
458  { "t", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, 0, 0, FLAGS },
459  { "replace", "replace color & alpha", OFFSET(replace), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, FLAGS },
460  { NULL }
461 };
462 
463 AVFILTER_DEFINE_CLASS(drawgrid);
464 
465 static const AVFilterPad drawgrid_inputs[] = {
466  {
467  .name = "default",
468  .type = AVMEDIA_TYPE_VIDEO,
469  .config_props = config_input,
470  .filter_frame = drawgrid_filter_frame,
471  .needs_writable = 1,
472  },
473  { NULL }
474 };
475 
476 static const AVFilterPad drawgrid_outputs[] = {
477  {
478  .name = "default",
479  .type = AVMEDIA_TYPE_VIDEO,
480  },
481  { NULL }
482 };
483 
485  .name = "drawgrid",
486  .description = NULL_IF_CONFIG_SMALL("Draw a colored grid on the input video."),
487  .priv_size = sizeof(DrawBoxContext),
488  .priv_class = &drawgrid_class,
489  .init = init,
491  .inputs = drawgrid_inputs,
492  .outputs = drawgrid_outputs,
495 };
496 
497 #endif /* CONFIG_DRAWGRID_FILTER */
#define NULL
Definition: coverity.c:32
AVFilter ff_vf_drawbox
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
#define av_pure
Definition: attributes.h:76
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:79
AVFilter ff_vf_drawgrid
int num
Numerator.
Definition: rational.h:59
char * color_str
Definition: vf_drawbox.c:75
static const char *const var_names[]
Definition: vf_drawbox.c:39
char * y_expr
expression for x and y
Definition: vf_drawbox.c:79
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
char * w_expr
Definition: vf_drawbox.c:80
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_drawbox.c:276
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:300
#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
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define OFFSET(x)
Definition: vf_drawbox.c:309
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
uint8_t
#define av_cold
Definition: attributes.h:88
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:177
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
static int query_formats(AVFilterContext *ctx)
Definition: vf_drawbox.c:108
static AVFrame * frame
#define FLAGS
Definition: vf_drawbox.c:310
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
char * x_expr
Definition: vf_drawbox.c:79
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:354
int invert_color
invert luma color
Definition: vf_drawbox.c:77
A filter pad used for either input or output.
Definition: internal.h:54
Definition: vf_drawbox.c:54
static int config_input(AVFilterLink *inlink)
Definition: vf_drawbox.c:124
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:776
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int width
Definition: frame.h:358
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:605
Various defines for YUV<->RGB conversion.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
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:869
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define RGB_TO_U_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:102
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:123
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
var_name
Definition: aeval.c:46
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
char * t_expr
expression for thickness
Definition: vf_drawbox.c:81
Definition: vf_drawbox.c:54
#define NAN
Definition: mathematics.h:64
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
static av_pure av_always_inline int pixel_belongs_to_box(DrawBoxContext *s, int x, int y)
Definition: vf_drawbox.c:211
char * h_expr
expression for width and height
Definition: vf_drawbox.c:80
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static const int NUM_EXPR_EVALS
Definition: vf_drawbox.c:86
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
static const int16_t alpha[]
Definition: ilbcdata.h:55
int hsub
chroma subsampling
Definition: vf_drawbox.c:78
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
const char * name
Filter name.
Definition: avfilter.h:148
Definition: vf_drawbox.c:54
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
#define flags(name, subs,...)
Definition: cbs_av1.c:576
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:279
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
static av_cold int init(AVFilterContext *ctx)
Definition: vf_drawbox.c:88
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:314
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_drawbox.c:217
A list of supported formats for one end of a filter link.
Definition: formats.h:64
#define RGB_TO_V_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:106
An instance of a filter.
Definition: avfilter.h:338
int height
Definition: frame.h:358
unsigned char yuv_color[4]
Definition: vf_drawbox.c:76
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
#define av_always_inline
Definition: attributes.h:45
Definition: vf_drawbox.c:54
internal API functions
#define RGB_TO_Y_CCIR(r, g, b)
Definition: colorspace.h:98
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
for(j=16;j >0;--j)
simple arithmetic expression evaluator