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 "float.h"
22 
23 #include "libavutil/avstring.h"
24 #include "libavutil/eval.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/opt.h"
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 typedef struct DrawGraphContext {
33  const AVClass *class;
34 
35  char *key[4];
36  float min, max;
37  char *fg_str[4];
39  uint8_t bg[4];
40  int mode;
41  int slide;
42  int w, h;
44 
46  int x;
47  int prev_y[4];
48  int first[4];
49  float *values[4];
50  int values_size[4];
51  int nb_values;
52  int64_t prev_pts;
54 
55 #define OFFSET(x) offsetof(DrawGraphContext, x)
56 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
57 
58 static const AVOption drawgraph_options[] = {
59  { "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
60  { "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, 0, 0, FLAGS },
61  { "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
62  { "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, 0, 0, FLAGS },
63  { "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
64  { "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, 0, 0, FLAGS },
65  { "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
66  { "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, 0, 0, FLAGS },
67  { "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, 0, 0, FLAGS },
68  { "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
69  { "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
70  { "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "mode" },
71  {"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode"},
72  {"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode"},
73  {"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode"},
74  { "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 4, FLAGS, "slide" },
75  {"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
76  {"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
77  {"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
78  {"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "slide"},
79  {"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, "slide"},
80  { "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
81  { "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
82  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
83  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
84  { NULL }
85 };
86 
87 static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
89 
91 {
92  DrawGraphContext *s = ctx->priv;
93  int ret, i;
94 
95  if (s->max <= s->min) {
96  av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
97  return AVERROR(EINVAL);
98  }
99 
100  for (i = 0; i < 4; i++) {
101  if (s->fg_str[i]) {
102  ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
103  NULL, NULL, NULL, NULL, 0, ctx);
104 
105  if (ret < 0)
106  return ret;
107  }
108  }
109 
110  s->first[0] = s->first[1] = s->first[2] = s->first[3] = 1;
111 
112  if (s->slide == 4) {
113  s->values[0] = av_fast_realloc(NULL, &s->values_size[0], 2000);
114  s->values[1] = av_fast_realloc(NULL, &s->values_size[1], 2000);
115  s->values[2] = av_fast_realloc(NULL, &s->values_size[2], 2000);
116  s->values[3] = av_fast_realloc(NULL, &s->values_size[3], 2000);
117 
118  if (!s->values[0] || !s->values[1] ||
119  !s->values[2] || !s->values[3]) {
120  return AVERROR(ENOMEM);
121  }
122  }
123 
124  return 0;
125 }
126 
128 {
129  AVFilterLink *outlink = ctx->outputs[0];
130  static const enum AVPixelFormat pix_fmts[] = {
133  };
134  int ret;
135 
137  if ((ret = ff_formats_ref(fmts_list, &outlink->incfg.formats)) < 0)
138  return ret;
139 
140  return 0;
141 }
142 
144 {
145  int i, j;
146  int bg = AV_RN32(s->bg);
147 
148  for (i = 0; i < out->height; i++)
149  for (j = 0; j < out->width; j++)
150  AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
151 }
152 
153 static inline void draw_dot(int fg, int x, int y, AVFrame *out)
154 {
155  AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
156 }
157 
159 {
160  AVFilterContext *ctx = inlink->dst;
161  DrawGraphContext *s = ctx->priv;
162  AVFilterLink *outlink = ctx->outputs[0];
163  AVDictionary *metadata;
165  AVFrame *out = s->out;
166  AVFrame *clone = NULL;
167  int64_t in_pts, out_pts;
168  int i;
169 
170  if (s->slide == 4 && s->nb_values >= s->values_size[0] / sizeof(float)) {
171  float *ptr;
172 
173  ptr = av_fast_realloc(s->values[0], &s->values_size[0], s->values_size[0] * 2);
174  if (!ptr)
175  return AVERROR(ENOMEM);
176  s->values[0] = ptr;
177 
178  ptr = av_fast_realloc(s->values[1], &s->values_size[1], s->values_size[1] * 2);
179  if (!ptr)
180  return AVERROR(ENOMEM);
181  s->values[1] = ptr;
182 
183  ptr = av_fast_realloc(s->values[2], &s->values_size[2], s->values_size[2] * 2);
184  if (!ptr)
185  return AVERROR(ENOMEM);
186  s->values[2] = ptr;
187 
188  ptr = av_fast_realloc(s->values[3], &s->values_size[3], s->values_size[3] * 2);
189  if (!ptr)
190  return AVERROR(ENOMEM);
191  s->values[3] = ptr;
192  }
193 
194  if (s->slide != 4 || s->nb_values == 0) {
195  if (!s->out || s->out->width != outlink->w ||
196  s->out->height != outlink->h) {
197  av_frame_free(&s->out);
198  s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
199  out = s->out;
200  if (!s->out) {
201  av_frame_free(&in);
202  return AVERROR(ENOMEM);
203  }
204 
205  clear_image(s, out, outlink);
206  }
208  }
209 
210  metadata = in->metadata;
211 
212  for (i = 0; i < 4; i++) {
213  double values[VAR_VARS_NB];
214  int j, y, x, old;
215  uint32_t fg, bg;
216  float vf;
217 
218  if (s->slide == 4)
219  s->values[i][s->nb_values] = NAN;
220 
221  e = av_dict_get(metadata, s->key[i], NULL, 0);
222  if (!e || !e->value)
223  continue;
224 
225  if (av_sscanf(e->value, "%f", &vf) != 1)
226  continue;
227 
228  vf = av_clipf(vf, s->min, s->max);
229 
230  if (s->slide == 4) {
231  s->values[i][s->nb_values] = vf;
232  continue;
233  }
234 
235  values[VAR_MIN] = s->min;
236  values[VAR_MAX] = s->max;
237  values[VAR_VAL] = vf;
238 
239  fg = av_expr_eval(s->fg_expr[i], values, NULL);
240  bg = AV_RN32(s->bg);
241 
242  if (i == 0 && (s->x >= outlink->w || s->slide == 3)) {
243  if (s->slide == 0 || s->slide == 1)
244  s->x = 0;
245 
246  if (s->slide == 2) {
247  s->x = outlink->w - 1;
248  for (j = 0; j < outlink->h; j++) {
249  memmove(out->data[0] + j * out->linesize[0] ,
250  out->data[0] + j * out->linesize[0] + 4,
251  (outlink->w - 1) * 4);
252  }
253  } else if (s->slide == 3) {
254  s->x = 0;
255  for (j = 0; j < outlink->h; j++) {
256  memmove(out->data[0] + j * out->linesize[0] + 4,
257  out->data[0] + j * out->linesize[0],
258  (outlink->w - 1) * 4);
259  }
260  } else if (s->slide == 0) {
261  clear_image(s, out, outlink);
262  }
263  }
264 
265  x = s->x;
266  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
267 
268  switch (s->mode) {
269  case 0:
270  if (i == 0 && (s->slide > 0))
271  for (j = 0; j < outlink->h; j++)
272  draw_dot(bg, x, j, out);
273 
274  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
275  for (j = y; j < outlink->h; j++) {
276  if (old != bg &&
277  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
278  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
279  draw_dot(fg, x, j, out);
280  break;
281  }
282  draw_dot(fg, x, j, out);
283  }
284  break;
285  case 1:
286  if (i == 0 && (s->slide > 0))
287  for (j = 0; j < outlink->h; j++)
288  draw_dot(bg, x, j, out);
289  draw_dot(fg, x, y, out);
290  break;
291  case 2:
292  if (s->first[i]) {
293  s->first[i] = 0;
294  s->prev_y[i] = y;
295  }
296 
297  if (i == 0 && (s->slide > 0)) {
298  for (j = 0; j < y; j++)
299  draw_dot(bg, x, j, out);
300  for (j = outlink->h - 1; j > y; j--)
301  draw_dot(bg, x, j, out);
302  }
303  if (y <= s->prev_y[i]) {
304  for (j = y; j <= s->prev_y[i]; j++)
305  draw_dot(fg, x, j, out);
306  } else {
307  for (j = s->prev_y[i]; j <= y; j++)
308  draw_dot(fg, x, j, out);
309  }
310  s->prev_y[i] = y;
311  break;
312  }
313  }
314 
315  s->nb_values++;
316  s->x++;
317 
318  in_pts = in->pts;
319 
320  av_frame_free(&in);
321 
322  if (s->slide == 4)
323  return 0;
324 
325  out_pts = av_rescale_q(in_pts, inlink->time_base, outlink->time_base);
326 
327  if (out_pts == s->prev_pts)
328  return 0;
329 
330  clone = av_frame_clone(s->out);
331  if (!clone)
332  return AVERROR(ENOMEM);
333 
334  clone->pts = s->prev_pts = out_pts;
335  return ff_filter_frame(outlink, clone);
336 }
337 
338 static int request_frame(AVFilterLink *outlink)
339 {
340  AVFilterContext *ctx = outlink->src;
341  DrawGraphContext *s = ctx->priv;
342  AVFrame *out = s->out;
343  int ret, i, k, step, l;
344 
345  ret = ff_request_frame(ctx->inputs[0]);
346 
347  if (s->slide == 4 && ret == AVERROR_EOF && s->nb_values > 0) {
348  s->x = l = 0;
349  step = ceil(s->nb_values / (float)s->w);
350 
351  for (k = 0; k < s->nb_values; k++) {
352  for (i = 0; i < 4; i++) {
353  double values[VAR_VARS_NB];
354  int j, y, x, old;
355  uint32_t fg, bg;
356  float vf = s->values[i][k];
357 
358  if (isnan(vf))
359  continue;
360 
361  values[VAR_MIN] = s->min;
362  values[VAR_MAX] = s->max;
363  values[VAR_VAL] = vf;
364 
365  fg = av_expr_eval(s->fg_expr[i], values, NULL);
366  bg = AV_RN32(s->bg);
367 
368  x = s->x;
369  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
370 
371  switch (s->mode) {
372  case 0:
373  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
374  for (j = y; j < outlink->h; j++) {
375  if (old != bg &&
376  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
377  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
378  draw_dot(fg, x, j, out);
379  break;
380  }
381  draw_dot(fg, x, j, out);
382  }
383  break;
384  case 1:
385  draw_dot(fg, x, y, out);
386  break;
387  case 2:
388  if (s->first[i]) {
389  s->first[i] = 0;
390  s->prev_y[i] = y;
391  }
392 
393  if (y <= s->prev_y[i]) {
394  for (j = y; j <= s->prev_y[i]; j++)
395  draw_dot(fg, x, j, out);
396  } else {
397  for (j = s->prev_y[i]; j <= y; j++)
398  draw_dot(fg, x, j, out);
399  }
400  s->prev_y[i] = y;
401  break;
402  }
403  }
404 
405  l++;
406  if (l >= step) {
407  l = 0;
408  s->x++;
409  }
410  }
411 
412  s->nb_values = 0;
413  out->pts = 0;
414  ret = ff_filter_frame(ctx->outputs[0], s->out);
415  }
416 
417  return ret;
418 }
419 
420 static int config_output(AVFilterLink *outlink)
421 {
422  DrawGraphContext *s = outlink->src->priv;
423 
424  outlink->w = s->w;
425  outlink->h = s->h;
426  outlink->sample_aspect_ratio = (AVRational){1,1};
427  outlink->frame_rate = s->frame_rate;
428  outlink->time_base = av_inv_q(outlink->frame_rate);
429  s->prev_pts = AV_NOPTS_VALUE;
430 
431  return 0;
432 }
433 
435 {
436  DrawGraphContext *s = ctx->priv;
437  int i;
438 
439  for (i = 0; i < 4; i++)
440  av_expr_free(s->fg_expr[i]);
441 
442  if (s->slide != 4)
443  av_frame_free(&s->out);
444 
445  av_freep(&s->values[0]);
446  av_freep(&s->values[1]);
447  av_freep(&s->values[2]);
448  av_freep(&s->values[3]);
449 }
450 
451 #if CONFIG_DRAWGRAPH_FILTER
452 
453 AVFILTER_DEFINE_CLASS(drawgraph);
454 
455 static const AVFilterPad drawgraph_inputs[] = {
456  {
457  .name = "default",
458  .type = AVMEDIA_TYPE_VIDEO,
459  .filter_frame = filter_frame,
460  },
461  { NULL }
462 };
463 
464 static const AVFilterPad drawgraph_outputs[] = {
465  {
466  .name = "default",
467  .type = AVMEDIA_TYPE_VIDEO,
468  .config_props = config_output,
469  .request_frame = request_frame,
470  },
471  { NULL }
472 };
473 
475  .name = "drawgraph",
476  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
477  .priv_size = sizeof(DrawGraphContext),
478  .priv_class = &drawgraph_class,
480  .init = init,
481  .uninit = uninit,
482  .inputs = drawgraph_inputs,
483  .outputs = drawgraph_outputs,
484 };
485 
486 #endif // CONFIG_DRAWGRAPH_FILTER
487 
488 #if CONFIG_ADRAWGRAPH_FILTER
489 
490 #define adrawgraph_options drawgraph_options
491 AVFILTER_DEFINE_CLASS(adrawgraph);
492 
493 static const AVFilterPad adrawgraph_inputs[] = {
494  {
495  .name = "default",
496  .type = AVMEDIA_TYPE_AUDIO,
497  .filter_frame = filter_frame,
498  },
499  { NULL }
500 };
501 
502 static const AVFilterPad adrawgraph_outputs[] = {
503  {
504  .name = "default",
505  .type = AVMEDIA_TYPE_VIDEO,
506  .config_props = config_output,
507  .request_frame = request_frame,
508  },
509  { NULL }
510 };
511 
513  .name = "adrawgraph",
514  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
515  .priv_size = sizeof(DrawGraphContext),
516  .priv_class = &adrawgraph_class,
518  .init = init,
519  .uninit = uninit,
520  .inputs = adrawgraph_inputs,
521  .outputs = adrawgraph_outputs,
522 };
523 #endif // CONFIG_ADRAWGRAPH_FILTER
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: f_drawgraph.c:338
DrawGraphContext::first
int first[4]
Definition: f_drawgraph.c:48
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
DrawGraphContext::prev_y
int prev_y[4]
Definition: f_drawgraph.c:47
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
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: f_drawgraph.c:127
DrawGraphContext::fg_str
char * fg_str[4]
Definition: f_drawgraph.c:37
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:420
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:204
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:324
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:417
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:39
VAR_VAL
@ VAR_VAL
Definition: f_drawgraph.c:88
AVOption
AVOption.
Definition: opt.h:248
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:408
float.h
max
#define max(a, b)
Definition: cuda_runtime.h:33
AVDictionary
Definition: dict.c:30
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
video.h
FLAGS
#define FLAGS
Definition: f_drawgraph.c:56
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
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:685
DrawGraphContext::min
float min
Definition: f_drawgraph.c:36
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:356
DrawGraphContext::bg
uint8_t bg[4]
Definition: f_drawgraph.c:39
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
draw_dot
static void draw_dot(int fg, int x, int y, AVFrame *out)
Definition: f_drawgraph.c:153
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
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:194
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
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:40
VAR_VARS_NB
@ VAR_VARS_NB
Definition: f_drawgraph.c:88
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:478
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
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:466
ff_vf_drawgraph
AVFilter ff_vf_drawgraph
DrawGraphContext::fg_expr
AVExpr * fg_expr[4]
Definition: f_drawgraph.c:38
OFFSET
#define OFFSET(x)
Definition: f_drawgraph.c:55
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
DrawGraphContext::mode
int mode
Definition: f_drawgraph.c:40
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:541
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:157
key
const char * key
Definition: hwcontext_opencl.c:168
NAN
#define NAN
Definition: mathematics.h:64
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
VAR_MAX
@ VAR_MAX
Definition: f_drawgraph.c:88
av_sscanf
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
Definition: avsscanf.c:962
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
var_names
static const char *const var_names[]
Definition: f_drawgraph.c:87
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:659
DrawGraphContext
Definition: f_drawgraph.c:32
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:50
AV_OPT_TYPE_COLOR
@ AV_OPT_TYPE_COLOR
Definition: opt.h:240
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
av_clipf
#define av_clipf
Definition: common.h:170
DrawGraphContext::key
char * key[4]
Definition: f_drawgraph.c:35
AV_RN32
#define AV_RN32(p)
Definition: intreadwrite.h:364
DrawGraphContext::prev_pts
int64_t prev_pts
Definition: f_drawgraph.c:52
clear_image
static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
Definition: f_drawgraph.c:143
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:117
AV_WN32
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
DrawGraphContext::x
int x
Definition: f_drawgraph.c:46
ff_avf_adrawgraph
AVFilter ff_avf_adrawgraph
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
DrawGraphContext::frame_rate
AVRational frame_rate
Definition: f_drawgraph.c:43
internal.h
DrawGraphContext::values
float * values[4]
Definition: f_drawgraph.c:49
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
VAR_MIN
@ VAR_MIN
Definition: f_drawgraph.c:88
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:326
init
static av_cold int init(AVFilterContext *ctx)
Definition: f_drawgraph.c:90
i
int i
Definition: input.c:407
uint8_t
uint8_t
Definition: audio_convert.c:194
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: internal.h:60
DrawGraphContext::w
int w
Definition: f_drawgraph.c:42
DrawGraphContext::max
float max
Definition: f_drawgraph.c:36
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
mode
mode
Definition: ebur128.h:83
DrawGraphContext::out
AVFrame * out
Definition: f_drawgraph.c:45
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: f_drawgraph.c:158
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
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:341
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVFilterFormatsConfig::formats
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:445
drawgraph_options
static const AVOption drawgraph_options[]
Definition: f_drawgraph.c:58
AVDictionaryEntry
Definition: dict.h:81
DrawGraphContext::h
int h
Definition: f_drawgraph.c:42
DrawGraphContext::slide
int slide
Definition: f_drawgraph.c:41
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVDictionaryEntry::value
char * value
Definition: dict.h:83
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
DrawGraphContext::nb_values
int nb_values
Definition: f_drawgraph.c:51
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_drawgraph.c:434
min
float min
Definition: vorbis_enc_data.h:456