FFmpeg: libavfilter/f_drawgraph.c Source File

FFmpeg
f_drawgraph.c
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1 /*
2  * Copyright (c) 2015 Paul B Mahol
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 "config_components.h"
22 
23 #include "libavutil/avstring.h"
24 #include "libavutil/eval.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/mem.h"
27 #include "libavutil/opt.h"
28 #include "avfilter.h"
29 #include "filters.h"
30 #include "formats.h"
31 #include "video.h"
32 
33  typedef struct DrawGraphContext {
34   const AVClass *class;
35 
36   char *key[4];
37   float min, max;
38   char *fg_str[4];
39   AVExpr *fg_expr[4];
40   uint8_t bg[4];
41   int mode;
42   int slide;
43   int w, h;
44   AVRational frame_rate;
45 
46   AVFrame *out;
47   int x;
48   int prev_y[4];
49   int first[4];
50   float *values[4];
51   int values_size[4];
52   int nb_values;
53   int64_t prev_pts;
54 } DrawGraphContext;
55 
56  #define OFFSET(x) offsetof(DrawGraphContext, x)
57  #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
58 
59  static const AVOption drawgraph_options[] = {
60  { "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
61  { "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, 0, 0, FLAGS },
62  { "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
63  { "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, 0, 0, FLAGS },
64  { "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
65  { "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, 0, 0, FLAGS },
66  { "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
67  { "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, 0, 0, FLAGS },
68  { "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, 0, 0, FLAGS },
69  { "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
70  { "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
71  { "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, .unit = "mode" },
72  {"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode"},
73  {"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode"},
74  {"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "mode"},
75  { "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 4, FLAGS, .unit = "slide" },
76  {"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "slide"},
77  {"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "slide"},
78  {"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "slide"},
79  {"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, .unit = "slide"},
80  {"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, .unit = "slide"},
81  { "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
82  { "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
83  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
84  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
85  { NULL }
86 };
87 
88 AVFILTER_DEFINE_CLASS_EXT(drawgraph, "(a)drawgraph", drawgraph_options);
89 
90  static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
91  enum { VAR_MAX, VAR_MIN, VAR_VAL, VAR_VARS_NB };
92 
93  static av_cold int init(AVFilterContext *ctx)
94 {
95  DrawGraphContext *s = ctx->priv;
96  int ret, i;
97 
98  if (s->max <= s->min) {
99  av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
100  return AVERROR(EINVAL);
101  }
102 
103  for (i = 0; i < 4; i++) {
104  if (s->fg_str[i]) {
105  ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
106  NULL, NULL, NULL, NULL, 0, ctx);
107 
108  if (ret < 0)
109  return ret;
110  }
111  }
112 
113  s->first[0] = s->first[1] = s->first[2] = s->first[3] = 1;
114 
115  if (s->slide == 4) {
116  s->values[0] = av_fast_realloc(NULL, &s->values_size[0], 2000);
117  s->values[1] = av_fast_realloc(NULL, &s->values_size[1], 2000);
118  s->values[2] = av_fast_realloc(NULL, &s->values_size[2], 2000);
119  s->values[3] = av_fast_realloc(NULL, &s->values_size[3], 2000);
120 
121  if (!s->values[0] || !s->values[1] ||
122  !s->values[2] || !s->values[3]) {
123  return AVERROR(ENOMEM);
124  }
125  }
126 
127  return 0;
128 }
129 
130  static int query_formats(AVFilterContext *ctx)
131 {
132  AVFilterLink *outlink = ctx->outputs[0];
133  static const enum AVPixelFormat pix_fmts[] = {
134  AV_PIX_FMT_RGBA,
135  AV_PIX_FMT_NONE
136  };
137  int ret;
138 
139  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
140  if ((ret = ff_formats_ref(fmts_list, &outlink->incfg.formats)) < 0)
141  return ret;
142 
143  return 0;
144 }
145 
146  static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
147 {
148  int i, j;
149  int bg = AV_RN32(s->bg);
150 
151  for (i = 0; i < out->height; i++)
152  for (j = 0; j < out->width; j++)
153  AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
154 }
155 
156  static inline void draw_dot(int fg, int x, int y, AVFrame *out)
157 {
158  AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
159 }
160 
161  static int filter_frame(AVFilterLink *inlink, AVFrame *in)
162 {
163  AVFilterContext *ctx = inlink->dst;
164  DrawGraphContext *s = ctx->priv;
165  AVFilterLink *outlink = ctx->outputs[0];
166  AVDictionary *metadata;
167  AVDictionaryEntry *e;
168  AVFrame *out = s->out;
169  AVFrame *clone = NULL;
170  int64_t in_pts, out_pts, in_duration;
171  int i;
172 
173  if (s->slide == 4 && s->nb_values >= s->values_size[0] / sizeof(float)) {
174  float *ptr;
175 
176  ptr = av_fast_realloc(s->values[0], &s->values_size[0], s->values_size[0] * 2);
177  if (!ptr)
178  return AVERROR(ENOMEM);
179  s->values[0] = ptr;
180 
181  ptr = av_fast_realloc(s->values[1], &s->values_size[1], s->values_size[1] * 2);
182  if (!ptr)
183  return AVERROR(ENOMEM);
184  s->values[1] = ptr;
185 
186  ptr = av_fast_realloc(s->values[2], &s->values_size[2], s->values_size[2] * 2);
187  if (!ptr)
188  return AVERROR(ENOMEM);
189  s->values[2] = ptr;
190 
191  ptr = av_fast_realloc(s->values[3], &s->values_size[3], s->values_size[3] * 2);
192  if (!ptr)
193  return AVERROR(ENOMEM);
194  s->values[3] = ptr;
195  }
196 
197  if (s->slide != 4 || s->nb_values == 0) {
198  if (!s->out || s->out->width != outlink->w ||
199  s->out->height != outlink->h) {
200  av_frame_free(&s->out);
201  s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
202  out = s->out;
203  if (!s->out) {
204  av_frame_free(&in);
205  return AVERROR(ENOMEM);
206  }
207 
208  clear_image(s, out, outlink);
209  }
210  av_frame_copy_props(out, in);
211  }
212 
213  metadata = in->metadata;
214 
215  for (i = 0; i < 4; i++) {
216  double values[VAR_VARS_NB];
217  int j, y, x, old;
218  uint32_t fg, bg;
219  float vf;
220 
221  if (s->slide == 4)
222  s->values[i][s->nb_values] = NAN;
223 
224  e = av_dict_get(metadata, s->key[i], NULL, 0);
225  if (!e || !e->value)
226  continue;
227 
228  if (av_sscanf(e->value, "%f", &vf) != 1)
229  continue;
230 
231  vf = av_clipf(vf, s->min, s->max);
232 
233  if (s->slide == 4) {
234  s->values[i][s->nb_values] = vf;
235  continue;
236  }
237 
238  values[VAR_MIN] = s->min;
239  values[VAR_MAX] = s->max;
240  values[VAR_VAL] = vf;
241 
242  fg = av_expr_eval(s->fg_expr[i], values, NULL);
243  bg = AV_RN32(s->bg);
244 
245  if (i == 0 && (s->x >= outlink->w || s->slide == 3)) {
246  if (s->slide == 0 || s->slide == 1)
247  s->x = 0;
248 
249  if (s->slide == 2) {
250  s->x = outlink->w - 1;
251  for (j = 0; j < outlink->h; j++) {
252  memmove(out->data[0] + j * out->linesize[0] ,
253  out->data[0] + j * out->linesize[0] + 4,
254  (outlink->w - 1) * 4);
255  }
256  } else if (s->slide == 3) {
257  s->x = 0;
258  for (j = 0; j < outlink->h; j++) {
259  memmove(out->data[0] + j * out->linesize[0] + 4,
260  out->data[0] + j * out->linesize[0],
261  (outlink->w - 1) * 4);
262  }
263  } else if (s->slide == 0) {
264  clear_image(s, out, outlink);
265  }
266  }
267 
268  x = s->x;
269  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
270 
271  switch (s->mode) {
272  case 0:
273  if (i == 0 && (s->slide > 0))
274  for (j = 0; j < outlink->h; j++)
275  draw_dot(bg, x, j, out);
276 
277  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
278  for (j = y; j < outlink->h; j++) {
279  if (old != bg &&
280  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
281  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
282  draw_dot(fg, x, j, out);
283  break;
284  }
285  draw_dot(fg, x, j, out);
286  }
287  break;
288  case 1:
289  if (i == 0 && (s->slide > 0))
290  for (j = 0; j < outlink->h; j++)
291  draw_dot(bg, x, j, out);
292  draw_dot(fg, x, y, out);
293  break;
294  case 2:
295  if (s->first[i]) {
296  s->first[i] = 0;
297  s->prev_y[i] = y;
298  }
299 
300  if (i == 0 && (s->slide > 0)) {
301  for (j = 0; j < y; j++)
302  draw_dot(bg, x, j, out);
303  for (j = outlink->h - 1; j > y; j--)
304  draw_dot(bg, x, j, out);
305  }
306  if (y <= s->prev_y[i]) {
307  for (j = y; j <= s->prev_y[i]; j++)
308  draw_dot(fg, x, j, out);
309  } else {
310  for (j = s->prev_y[i]; j <= y; j++)
311  draw_dot(fg, x, j, out);
312  }
313  s->prev_y[i] = y;
314  break;
315  }
316  }
317 
318  s->nb_values++;
319  s->x++;
320 
321  in_pts = in->pts;
322  in_duration = in->duration;
323 
324  av_frame_free(&in);
325 
326  if (s->slide == 4)
327  return 0;
328 
329  out_pts = av_rescale_q(in_pts, inlink->time_base, outlink->time_base);
330 
331  if (out_pts == s->prev_pts)
332  return 0;
333 
334  clone = av_frame_clone(s->out);
335  if (!clone)
336  return AVERROR(ENOMEM);
337 
338  clone->pts = s->prev_pts = out_pts;
339  clone->duration = av_rescale_q(in_duration, inlink->time_base, outlink->time_base);
340  return ff_filter_frame(outlink, clone);
341 }
342 
343  static int request_frame(AVFilterLink *outlink)
344 {
345  AVFilterContext *ctx = outlink->src;
346  DrawGraphContext *s = ctx->priv;
347  AVFrame *out = s->out;
348  int ret, i, k, step, l;
349 
350  ret = ff_request_frame(ctx->inputs[0]);
351 
352  if (s->slide == 4 && ret == AVERROR_EOF && s->nb_values > 0) {
353  s->x = l = 0;
354  step = ceil(s->nb_values / (float)s->w);
355 
356  for (k = 0; k < s->nb_values; k++) {
357  for (i = 0; i < 4; i++) {
358  double values[VAR_VARS_NB];
359  int j, y, x, old;
360  uint32_t fg, bg;
361  float vf = s->values[i][k];
362 
363  if (isnan(vf))
364  continue;
365 
366  values[VAR_MIN] = s->min;
367  values[VAR_MAX] = s->max;
368  values[VAR_VAL] = vf;
369 
370  fg = av_expr_eval(s->fg_expr[i], values, NULL);
371  bg = AV_RN32(s->bg);
372 
373  x = s->x;
374  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
375 
376  switch (s->mode) {
377  case 0:
378  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
379  for (j = y; j < outlink->h; j++) {
380  if (old != bg &&
381  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
382  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
383  draw_dot(fg, x, j, out);
384  break;
385  }
386  draw_dot(fg, x, j, out);
387  }
388  break;
389  case 1:
390  draw_dot(fg, x, y, out);
391  break;
392  case 2:
393  if (s->first[i]) {
394  s->first[i] = 0;
395  s->prev_y[i] = y;
396  }
397 
398  if (y <= s->prev_y[i]) {
399  for (j = y; j <= s->prev_y[i]; j++)
400  draw_dot(fg, x, j, out);
401  } else {
402  for (j = s->prev_y[i]; j <= y; j++)
403  draw_dot(fg, x, j, out);
404  }
405  s->prev_y[i] = y;
406  break;
407  }
408  }
409 
410  l++;
411  if (l >= step) {
412  l = 0;
413  s->x++;
414  }
415  }
416 
417  s->nb_values = 0;
418  out->pts = 0;
419  ret = ff_filter_frame(ctx->outputs[0], s->out);
420  }
421 
422  return ret;
423 }
424 
425  static int config_output(AVFilterLink *outlink)
426 {
427  FilterLink *l = ff_filter_link(outlink);
428  DrawGraphContext *s = outlink->src->priv;
429 
430  outlink->w = s->w;
431  outlink->h = s->h;
432  outlink->sample_aspect_ratio = (AVRational){1,1};
433  l->frame_rate = s->frame_rate;
434  outlink->time_base = av_inv_q(l->frame_rate);
435  s->prev_pts = AV_NOPTS_VALUE;
436 
437  return 0;
438 }
439 
440  static av_cold void uninit(AVFilterContext *ctx)
441 {
442  DrawGraphContext *s = ctx->priv;
443  int i;
444 
445  for (i = 0; i < 4; i++)
446  av_expr_free(s->fg_expr[i]);
447 
448  if (s->slide != 4)
449  av_frame_free(&s->out);
450 
451  av_freep(&s->values[0]);
452  av_freep(&s->values[1]);
453  av_freep(&s->values[2]);
454  av_freep(&s->values[3]);
455 }
456 
457  static const AVFilterPad drawgraph_outputs[] = {
458  {
459  .name = "default",
460  .type = AVMEDIA_TYPE_VIDEO,
461  .config_props = config_output,
462  .request_frame = request_frame,
463  },
464 };
465 
466 #if CONFIG_DRAWGRAPH_FILTER
467 
468 static const AVFilterPad drawgraph_inputs[] = {
469  {
470  .name = "default",
471  .type = AVMEDIA_TYPE_VIDEO,
472  .filter_frame = filter_frame,
473  },
474 };
475 
476 const AVFilter ff_vf_drawgraph = {
477  .name = "drawgraph",
478  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
479  .priv_size = sizeof(DrawGraphContext),
480  .priv_class = &drawgraph_class,
481  .init = init,
482  .uninit = uninit,
483  FILTER_INPUTS(drawgraph_inputs),
484  FILTER_OUTPUTS(drawgraph_outputs),
485  FILTER_QUERY_FUNC(query_formats),
486 };
487 
488 #endif // CONFIG_DRAWGRAPH_FILTER
489 
490 #if CONFIG_ADRAWGRAPH_FILTER
491 
492 static const AVFilterPad adrawgraph_inputs[] = {
493  {
494  .name = "default",
495  .type = AVMEDIA_TYPE_AUDIO,
496  .filter_frame = filter_frame,
497  },
498 };
499 
500 const AVFilter ff_avf_adrawgraph = {
501  .name = "adrawgraph",
502  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
503  .priv_class = &drawgraph_class,
504  .priv_size = sizeof(DrawGraphContext),
505  .init = init,
506  .uninit = uninit,
507  FILTER_INPUTS(adrawgraph_inputs),
508  FILTER_OUTPUTS(drawgraph_outputs),
509  FILTER_QUERY_FUNC(query_formats),
510 };
511 #endif // CONFIG_ADRAWGRAPH_FILTER
AVFILTER_DEFINE_CLASS_EXT
AVFILTER_DEFINE_CLASS_EXT(drawgraph, "(a)drawgraph", drawgraph_options)
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:116
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: f_drawgraph.c:343
DrawGraphContext::first
int first[4]
Definition: f_drawgraph.c:49
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
DrawGraphContext::prev_y
int prev_y[4]
Definition: f_drawgraph.c:48
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:435
out
FILE * out
Definition: movenc.c:55
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1023
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:795
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
Underlying C type is AVRational.
Definition: opt.h:315
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: f_drawgraph.c:130
int64_t
long long int64_t
Definition: coverity.c:34
DrawGraphContext::fg_str
char * fg_str[4]
Definition: f_drawgraph.c:38
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
config_output
static int config_output(AVFilterLink *outlink)
Definition: f_drawgraph.c:425
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:162
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:501
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
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:429
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:472
max
#define max(a, b)
Definition: cuda_runtime.h:33
AVDictionary
Definition: dict.c:34
ff_avf_adrawgraph
const AVFilter ff_avf_adrawgraph
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:205
video.h
FLAGS
#define FLAGS
Definition: f_drawgraph.c:57
VAR_MIN
@ VAR_MIN
Definition: f_drawgraph.c:91
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
av_expr_parse
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:710
DrawGraphContext::min
float min
Definition: f_drawgraph.c:37
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:472
VAR_MAX
@ VAR_MAX
Definition: f_drawgraph.c:91
DrawGraphContext::bg
uint8_t bg[4]
Definition: f_drawgraph.c:40
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:358
draw_dot
static void draw_dot(int fg, int x, int y, AVFrame *out)
Definition: f_drawgraph.c:156
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
ceil
static __device__ float ceil(float a)
Definition: cuda_runtime.h:176
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:62
av_fast_realloc
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:497
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:678
DrawGraphContext::fg_expr
AVExpr * fg_expr[4]
Definition: f_drawgraph.c:39
OFFSET
#define OFFSET(x)
Definition: f_drawgraph.c:56
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:304
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:792
DrawGraphContext::mode
int mode
Definition: f_drawgraph.c:41
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:597
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
AVExpr
Definition: eval.c:158
key
const char * key
Definition: hwcontext_opencl.c:189
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
NAN
#define NAN
Definition: mathematics.h:115
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:100
av_sscanf
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
Definition: avsscanf.c:961
drawgraph_outputs
static const AVFilterPad drawgraph_outputs[]
Definition: f_drawgraph.c:457
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
var_names
static const char *const var_names[]
Definition: f_drawgraph.c:90
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:713
DrawGraphContext
Definition: f_drawgraph.c:33
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
isnan
#define isnan(x)
Definition: libm.h:340
DrawGraphContext::values_size
int values_size[4]
Definition: f_drawgraph.c:51
AV_OPT_TYPE_COLOR
@ AV_OPT_TYPE_COLOR
Underlying C type is uint8_t[4].
Definition: opt.h:323
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
Underlying C type is two consecutive integers.
Definition: opt.h:303
DrawGraphContext::key
char * key[4]
Definition: f_drawgraph.c:36
AV_RN32
#define AV_RN32(p)
Definition: intreadwrite.h:360
DrawGraphContext::prev_pts
int64_t prev_pts
Definition: f_drawgraph.c:53
av_clipf
av_clipf
Definition: af_crystalizer.c:122
ff_vf_drawgraph
const AVFilter ff_vf_drawgraph
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
clear_image
static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
Definition: f_drawgraph.c:146
eval.h
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:94
AV_WN32
#define AV_WN32(p, v)
Definition: intreadwrite.h:372
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
DrawGraphContext::x
int x
Definition: f_drawgraph.c:47
DrawGraphContext::frame_rate
AVRational frame_rate
Definition: f_drawgraph.c:44
DrawGraphContext::values
float * values[4]
Definition: f_drawgraph.c:50
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Underlying C type is float.
Definition: opt.h:271
init
static av_cold int init(AVFilterContext *ctx)
Definition: f_drawgraph.c:93
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AVFilterPad::name
const char * name
Pad name.
Definition: filters.h:44
DrawGraphContext::w
int w
Definition: f_drawgraph.c:43
DrawGraphContext::max
float max
Definition: f_drawgraph.c:37
AVFilter
Filter definition.
Definition: avfilter.h:201
ret
ret
Definition: filter_design.txt:187
mode
mode
Definition: ebur128.h:83
DrawGraphContext::out
AVFrame * out
Definition: f_drawgraph.c:46
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: f_drawgraph.c:161
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
AVFrame::metadata
AVDictionary * metadata
metadata.
Definition: frame.h:707
values
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
Definition: filter_design.txt:263
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mem.h
AVFilterFormatsConfig::formats
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:116
VAR_VAL
@ VAR_VAL
Definition: f_drawgraph.c:91
drawgraph_options
static const AVOption drawgraph_options[]
Definition: f_drawgraph.c:59
AVDictionaryEntry
Definition: dict.h:89
DrawGraphContext::h
int h
Definition: f_drawgraph.c:43
DrawGraphContext::slide
int slide
Definition: f_drawgraph.c:42
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
VAR_VARS_NB
@ VAR_VARS_NB
Definition: f_drawgraph.c:91
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVDictionaryEntry::value
char * value
Definition: dict.h:91
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
vf
uint8_t ptrdiff_t const uint8_t ptrdiff_t int const int8_t const int8_t * vf
Definition: dsp.h:249
DrawGraphContext::nb_values
int nb_values
Definition: f_drawgraph.c:52
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_drawgraph.c:440
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: filters.h:236
min
float min
Definition: vorbis_enc_data.h:429
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