FFmpeg
avf_avectorscope.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2013 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 /**
22  * @file
23  * audio to video multimedia vectorscope filter
24  */
25 
26 #include "libavutil/avassert.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "audio.h"
34 #include "video.h"
35 
36 enum VectorScopeMode {
37  LISSAJOUS,
38  LISSAJOUS_XY,
39  POLAR,
40  MODE_NB,
41 };
42 
43 enum VectorScopeDraw {
44  DOT,
45  LINE,
46  AALINE,
47  DRAW_NB,
48 };
49 
50 enum VectorScopeScale {
51  LIN,
52  SQRT,
53  CBRT,
54  LOG,
55  SCALE_NB,
56 };
57 
58 typedef struct AudioVectorScopeContext {
59  const AVClass *class;
60  AVFrame *outpicref;
61  int w, h;
62  int hw, hh;
63  int mode;
64  int draw;
65  int scale;
66  int contrast[4];
67  int fade[4];
68  double zoom;
69  int swap;
70  int mirror;
71  unsigned prev_x, prev_y;
72  AVRational frame_rate;
73  int nb_samples;
74 } AudioVectorScopeContext;
75 
76 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
77 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
78 #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
79 
80 static const AVOption avectorscope_options[] = {
81  { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, .unit = "mode" },
82  { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, .unit = "mode" },
83  { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, TFLAGS, .unit = "mode" },
84  { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, TFLAGS, .unit = "mode" },
85  { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, TFLAGS, .unit = "mode" },
86  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
87  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
88  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
89  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
90  { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, TFLAGS },
91  { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, TFLAGS },
92  { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, TFLAGS },
93  { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, TFLAGS },
94  { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, TFLAGS },
95  { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, TFLAGS },
96  { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
97  { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
98  { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, TFLAGS },
99  { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, TFLAGS, .unit = "draw" },
100  { "dot", "draw dots", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, TFLAGS, .unit = "draw" },
101  { "line", "draw lines", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, TFLAGS, .unit = "draw" },
102  { "aaline","draw anti-aliased lines", 0, AV_OPT_TYPE_CONST, {.i64=AALINE},0,0, TFLAGS, .unit = "draw" },
103  { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, TFLAGS, .unit = "scale" },
104  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, TFLAGS, .unit = "scale" },
105  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, TFLAGS, .unit = "scale" },
106  { "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, TFLAGS, .unit = "scale" },
107  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, TFLAGS, .unit = "scale" },
108  { "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, TFLAGS },
109  { "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, TFLAGS, .unit = "mirror" },
110  { "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, TFLAGS, .unit = "mirror" },
111  { "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, TFLAGS, .unit = "mirror" },
112  { "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, TFLAGS, .unit = "mirror" },
113  { "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, TFLAGS, .unit = "mirror" },
114  { NULL }
115 };
116 
117 AVFILTER_DEFINE_CLASS(avectorscope);
118 
119 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y, int value)
120 {
121  const ptrdiff_t linesize = s->outpicref->linesize[0];
122  uint8_t *dst;
123 
124  if (s->zoom > 1) {
125  if (y >= s->h || x >= s->w)
126  return;
127  } else {
128  y = FFMIN(y, s->h - 1);
129  x = FFMIN(x, s->w - 1);
130  }
131 
132  dst = s->outpicref->data[0] + y * linesize + x * 4;
133  dst[0] = FFMIN(dst[0] + s->contrast[0], value);
134  dst[1] = FFMIN(dst[1] + s->contrast[1], value);
135  dst[2] = FFMIN(dst[2] + s->contrast[2], value);
136  dst[3] = FFMIN(dst[3] + s->contrast[3], value);
137 }
138 
139 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
140 {
141  int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
142  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
143  int err = (dx>dy ? dx : -dy) / 2, e2;
144 
145  for (;;) {
146  draw_dot(s, x0, y0, 255);
147 
148  if (x0 == x1 && y0 == y1)
149  break;
150 
151  e2 = err;
152 
153  if (e2 >-dx) {
154  err -= dy;
155  x0 += sx;
156  }
157 
158  if (e2 < dy) {
159  err += dx;
160  y0 += sy;
161  }
162  }
163 }
164 
165 static void draw_aaline(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
166 {
167  int sx = x0 < x1 ? 1 : -1, sy = y0 < y1 ? 1 : -1, x2;
168  int dx = FFABS(x1-x0), dy = FFABS(y1-y0), err = dx * dx + dy * dy;
169  int e2 = err == 0 ? 1 : 0xffffff / (dx + dy);
170 
171  dx *= e2;
172  dy *= e2;
173  err = dx - dy;
174 
175  for (;;) {
176  draw_dot(s, x0, y0, 255-(FFABS(err - dx + dy) >> 16));
177  e2 = err;
178  x2 = x0;
179  if (2 * e2 >= -dx) {
180  if (x0 == x1)
181  break;
182  if (e2 + dy < 0xff0000)
183  draw_dot(s, x0, y0 + sy, 255-((e2 + dy) >> 16));
184  err -= dy;
185  x0 += sx;
186  }
187 
188  if (2 * e2 <= dy) {
189  if (y0 == y1)
190  break;
191  if (dx - e2 < 0xff0000)
192  draw_dot(s, x2 + sx, y0, 255-((dx - e2) >> 16));
193  err += dx;
194  y0 += sy;
195  }
196  }
197 }
198 
199 static int fade(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
200 {
201  AudioVectorScopeContext *s = ctx->priv;
202  const int linesize = s->outpicref->linesize[0];
203  const int height = s->outpicref->height;
204  const int slice_start = (height * jobnr ) / nb_jobs;
205  const int slice_end = (height * (jobnr+1)) / nb_jobs;
206 
207  if (s->fade[0] == 255 && s->fade[1] == 255 && s->fade[2] == 255) {
208  for (int i = slice_start; i < slice_end; i++)
209  memset(s->outpicref->data[0] + i * linesize, 0, s->outpicref->width * 4);
210  return 0;
211  }
212 
213  if (s->fade[0] || s->fade[1] || s->fade[2]) {
214  uint8_t *d = s->outpicref->data[0] + slice_start * linesize;
215  for (int i = slice_start; i < slice_end; i++) {
216  for (int j = 0; j < s->w*4; j+=4) {
217  if (d[j+0])
218  d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
219  if (d[j+1])
220  d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
221  if (d[j+2])
222  d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
223  if (d[j+3])
224  d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
225  }
226  d += linesize;
227  }
228  }
229 
230  return 0;
231 }
232 
233 static int query_formats(const AVFilterContext *ctx,
234  AVFilterFormatsConfig **cfg_in,
235  AVFilterFormatsConfig **cfg_out)
236 {
237  AVFilterFormats *formats = NULL;
238  static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
239  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
240  static const AVChannelLayout layouts[] = {
241  AV_CHANNEL_LAYOUT_STEREO,
242  { .nb_channels = 0 },
243  };
244  int ret;
245 
246  formats = ff_make_format_list(sample_fmts);
247  if ((ret = ff_formats_ref (formats, &cfg_in[0]->formats )) < 0)
248  return ret;
249 
250  ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, layouts);
251  if (ret < 0)
252  return ret;
253 
254  formats = ff_make_format_list(pix_fmts);
255  if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
256  return ret;
257 
258  return 0;
259 }
260 
261 static int config_input(AVFilterLink *inlink)
262 {
263  AVFilterContext *ctx = inlink->dst;
264  AudioVectorScopeContext *s = ctx->priv;
265 
266  s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
267 
268  return 0;
269 }
270 
271 static int config_output(AVFilterLink *outlink)
272 {
273  AudioVectorScopeContext *s = outlink->src->priv;
274  FilterLink *l = ff_filter_link(outlink);
275 
276  outlink->w = s->w;
277  outlink->h = s->h;
278  outlink->sample_aspect_ratio = (AVRational){1,1};
279  l->frame_rate = s->frame_rate;
280  outlink->time_base = av_inv_q(l->frame_rate);
281 
282  s->prev_x = s->hw = s->w / 2;
283  s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
284 
285  return 0;
286 }
287 
288 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
289 {
290  AVFilterContext *ctx = inlink->dst;
291  AVFilterLink *outlink = ctx->outputs[0];
292  const int16_t *samples = (const int16_t *)insamples->data[0];
293  const float *samplesf = (const float *)insamples->data[0];
294  AudioVectorScopeContext *s = ctx->priv;
295  const int hw = s->hw;
296  const int hh = s->hh;
297  AVFrame *clone;
298  unsigned x, y;
299  unsigned prev_x = s->prev_x, prev_y = s->prev_y;
300  double zoom = s->zoom;
301  int ret;
302 
303  if (!s->outpicref || s->outpicref->width != outlink->w ||
304  s->outpicref->height != outlink->h) {
305  av_frame_free(&s->outpicref);
306  s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
307  if (!s->outpicref) {
308  av_frame_free(&insamples);
309  return AVERROR(ENOMEM);
310  }
311 
312  s->outpicref->sample_aspect_ratio = (AVRational){1,1};
313  for (int i = 0; i < outlink->h; i++)
314  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
315  }
316  s->outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
317  s->outpicref->duration = 1;
318 
319  ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
320  if (ret < 0) {
321  av_frame_free(&insamples);
322  return ret;
323  }
324  ff_filter_execute(ctx, fade, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
325 
326  if (zoom < 1) {
327  float max = 0;
328 
329  switch (insamples->format) {
330  case AV_SAMPLE_FMT_S16:
331  for (int i = 0; i < insamples->nb_samples * 2; i++) {
332  float sample = samples[i] / (float)INT16_MAX;
333  max = FFMAX(FFABS(sample), max);
334  }
335  break;
336  case AV_SAMPLE_FMT_FLT:
337  for (int i = 0; i < insamples->nb_samples * 2; i++) {
338  max = FFMAX(FFABS(samplesf[i]), max);
339  }
340  break;
341  default:
342  av_assert2(0);
343  }
344 
345  switch (s->scale) {
346  case SQRT:
347  max = sqrtf(max);
348  break;
349  case CBRT:
350  max = cbrtf(max);
351  break;
352  case LOG:
353  max = logf(1 + max) / logf(2);
354  break;
355  }
356 
357  if (max > 0.f)
358  zoom = 1. / max;
359  }
360 
361  for (int i = 0; i < insamples->nb_samples; i++) {
362  float src[2];
363 
364  switch (insamples->format) {
365  case AV_SAMPLE_FMT_S16:
366  src[0] = samples[i*2+0] / (float)INT16_MAX;
367  src[1] = samples[i*2+1] / (float)INT16_MAX;
368  break;
369  case AV_SAMPLE_FMT_FLT:
370  src[0] = samplesf[i*2+0];
371  src[1] = samplesf[i*2+1];
372  break;
373  default:
374  av_assert2(0);
375  }
376 
377  switch (s->scale) {
378  case SQRT:
379  src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
380  src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
381  break;
382  case CBRT:
383  src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
384  src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
385  break;
386  case LOG:
387  src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
388  src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
389  break;
390  }
391 
392  if (s->mirror & 1)
393  src[0] = -src[0];
394 
395  if (s->mirror & 2)
396  src[1] = -src[1];
397 
398  if (s->swap)
399  FFSWAP(float, src[0], src[1]);
400 
401  if (s->mode == LISSAJOUS) {
402  x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
403  y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
404  } else if (s->mode == LISSAJOUS_XY) {
405  x = (src[1] * zoom + 1) * hw;
406  y = (src[0] * zoom + 1) * hh;
407  } else {
408  float sx, sy, cx, cy;
409 
410  sx = src[1] * zoom;
411  sy = src[0] * zoom;
412  cx = sx * sqrtf(1 - 0.5 * sy * sy);
413  cy = sy * sqrtf(1 - 0.5 * sx * sx);
414  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
415  y = s->h - s->h * fabsf(cx + cy) * .7;
416  }
417 
418  if (s->draw == DOT) {
419  draw_dot(s, x, y, 255);
420  } else if (s->draw == LINE) {
421  draw_line(s, x, y, prev_x, prev_y);
422  } else {
423  draw_aaline(s, x, y, prev_x, prev_y);
424  }
425  prev_x = x;
426  prev_y = y;
427  }
428 
429  s->prev_x = x, s->prev_y = y;
430  av_frame_free(&insamples);
431 
432  clone = av_frame_clone(s->outpicref);
433  if (!clone)
434  return AVERROR(ENOMEM);
435 
436  return ff_filter_frame(outlink, clone);
437 }
438 
439 static int activate(AVFilterContext *ctx)
440 {
441  AVFilterLink *inlink = ctx->inputs[0];
442  AVFilterLink *outlink = ctx->outputs[0];
443  AudioVectorScopeContext *s = ctx->priv;
444  AVFrame *in;
445  int ret;
446 
447  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
448 
449  ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
450  if (ret < 0)
451  return ret;
452  if (ret > 0)
453  return filter_frame(inlink, in);
454 
455  if (ff_inlink_queued_samples(inlink) >= s->nb_samples) {
456  ff_filter_set_ready(ctx, 10);
457  return 0;
458  }
459 
460  FF_FILTER_FORWARD_STATUS(inlink, outlink);
461  FF_FILTER_FORWARD_WANTED(outlink, inlink);
462 
463  return FFERROR_NOT_READY;
464 }
465 
466 static av_cold void uninit(AVFilterContext *ctx)
467 {
468  AudioVectorScopeContext *s = ctx->priv;
469 
470  av_frame_free(&s->outpicref);
471 }
472 
473 static const AVFilterPad audiovectorscope_inputs[] = {
474  {
475  .name = "default",
476  .type = AVMEDIA_TYPE_AUDIO,
477  .config_props = config_input,
478  },
479 };
480 
481 static const AVFilterPad audiovectorscope_outputs[] = {
482  {
483  .name = "default",
484  .type = AVMEDIA_TYPE_VIDEO,
485  .config_props = config_output,
486  },
487 };
488 
489 const AVFilter ff_avf_avectorscope = {
490  .name = "avectorscope",
491  .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
492  .uninit = uninit,
493  .priv_size = sizeof(AudioVectorScopeContext),
494  .activate = activate,
495  FILTER_INPUTS(audiovectorscope_inputs),
496  FILTER_OUTPUTS(audiovectorscope_outputs),
497  FILTER_QUERY_FUNC2(query_formats),
498  .priv_class = &avectorscope_class,
499  .flags = AVFILTER_FLAG_SLICE_THREADS,
500  .process_command = ff_filter_process_command,
501 };
AudioVectorScopeContext::draw
int draw
Definition: avf_avectorscope.c:64
formats
formats
Definition: signature.h:47
TFLAGS
#define TFLAGS
Definition: avf_avectorscope.c:78
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
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
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
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:387
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1062
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:335
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
Underlying C type is AVRational.
Definition: opt.h:315
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
zoom
static void zoom(float *u, float *v, float amount)
Definition: vf_xfade.c:1695
DRAW_NB
@ DRAW_NB
Definition: avf_avectorscope.c:47
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
VectorScopeScale
VectorScopeScale
Definition: avf_avectorscope.c:50
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:501
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:429
ff_set_common_channel_layouts_from_list2
int ff_set_common_channel_layouts_from_list2(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out, const AVChannelLayout *fmts)
Definition: formats.c:920
AudioVectorScopeContext::frame_rate
AVRational frame_rate
Definition: avf_avectorscope.c:72
max
#define max(a, b)
Definition: cuda_runtime.h:33
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:205
video.h
FF_FILTER_FORWARD_STATUS_BACK
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:434
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:410
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
fade
static int fade(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_avectorscope.c:199
LISSAJOUS_XY
@ LISSAJOUS_XY
Definition: avf_avectorscope.c:38
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict, int *got_output)
Handle slice ends.
Definition: mpeg12dec.c:1719
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:472
AudioVectorScopeContext::hw
int hw
Definition: avf_avectorscope.c:62
FFSIGN
#define FFSIGN(a)
Definition: common.h:75
AudioVectorScopeContext::hh
int hh
Definition: avf_avectorscope.c:62
OFFSET
#define OFFSET(x)
Definition: avf_avectorscope.c:76
fabsf
static __device__ float fabsf(float a)
Definition: cuda_runtime.h:181
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
LIN
@ LIN
Definition: avf_avectorscope.c:51
CBRT
@ CBRT
Definition: avf_avectorscope.c:53
avassert.h
av_cold
#define av_cold
Definition: attributes.h:90
AudioVectorScopeContext::fade
int fade[4]
Definition: avf_avectorscope.c:67
SQRT
@ SQRT
Definition: avf_avectorscope.c:52
float
float
Definition: af_crystalizer.c:122
AudioVectorScopeContext::nb_samples
int nb_samples
Definition: avf_avectorscope.c:73
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Underlying C type is double.
Definition: opt.h:267
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
AudioVectorScopeContext::contrast
int contrast[4]
Definition: avf_avectorscope.c:66
AudioVectorScopeContext::mode
int mode
Definition: avf_avectorscope.c:63
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:304
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: avf_avectorscope.c:233
ctx
AVFormatContext * ctx
Definition: movenc.c:49
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
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
AudioVectorScopeContext::zoom
double zoom
Definition: avf_avectorscope.c:68
draw_line
static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
Definition: avf_avectorscope.c:139
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:100
ff_inlink_make_frame_writable
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1538
arg
const char * arg
Definition: jacosubdec.c:67
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:74
draw_aaline
static void draw_aaline(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
Definition: avf_avectorscope.c:165
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
ff_inlink_consume_samples
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link's FIFO and update the link's stats.
Definition: avfilter.c:1511
NULL
#define NULL
Definition: coverity.c:32
LOG
@ LOG
Definition: avf_avectorscope.c:54
config_input
static int config_input(AVFilterLink *inlink)
Definition: avf_avectorscope.c:261
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
Underlying C type is two consecutive integers.
Definition: opt.h:303
AudioVectorScopeContext::mirror
int mirror
Definition: avf_avectorscope.c:70
DOT
@ DOT
Definition: avf_avectorscope.c:44
VectorScopeDraw
VectorScopeDraw
Definition: avf_avectorscope.c:43
parseutils.h
AudioVectorScopeContext::prev_x
unsigned prev_x
Definition: avf_avectorscope.c:71
sqrtf
static __device__ float sqrtf(float a)
Definition: cuda_runtime.h:184
LISSAJOUS
@ LISSAJOUS
Definition: avf_avectorscope.c:37
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:111
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
AudioVectorScopeContext::h
int h
Definition: avf_avectorscope.c:61
AudioVectorScopeContext
Definition: avf_avectorscope.c:58
mirror
static void mirror(const float *modifier, float *vec)
Definition: vf_v360.c:4097
f
f
Definition: af_crystalizer.c:122
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
height
#define height
Definition: dsp.h:85
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:311
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
sample
#define sample
Definition: flacdsp_template.c:44
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:476
LINE
@ LINE
Definition: avf_avectorscope.c:45
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:901
FF_FILTER_FORWARD_WANTED
FF_FILTER_FORWARD_WANTED(outlink, inlink)
audiovectorscope_inputs
static const AVFilterPad audiovectorscope_inputs[]
Definition: avf_avectorscope.c:473
draw
static int draw(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showcwt.c:440
AudioVectorScopeContext::swap
int swap
Definition: avf_avectorscope.c:69
AudioVectorScopeContext::scale
int scale
Definition: avf_avectorscope.c:65
draw_dot
static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y, int value)
Definition: avf_avectorscope.c:119
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:67
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:469
MODE_NB
@ MODE_NB
Definition: avf_avectorscope.c:40
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
FLAGS
#define FLAGS
Definition: avf_avectorscope.c:77
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:841
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
cbrtf
static av_always_inline float cbrtf(float x)
Definition: libm.h:61
AudioVectorScopeContext::outpicref
AVFrame * outpicref
Definition: avf_avectorscope.c:60
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(avectorscope)
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
ff_inlink_queued_samples
int ff_inlink_queued_samples(AVFilterLink *link)
Definition: avfilter.c:1466
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
slice_start
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc, const CodedBitstreamUnit *unit, const int is_first_slice)
Definition: dec.c:733
AVFilter
Filter definition.
Definition: avfilter.h:201
VectorScopeMode
VectorScopeMode
Definition: avf_avectorscope.c:36
ret
ret
Definition: filter_design.txt:187
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
AALINE
@ AALINE
Definition: avf_avectorscope.c:46
channel_layout.h
ff_filter_execute
int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:1667
mode
mode
Definition: ebur128.h:83
config_output
static int config_output(AVFilterLink *outlink)
Definition: avf_avectorscope.c:271
SCALE_NB
@ SCALE_NB
Definition: avf_avectorscope.c:55
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_avectorscope.c:466
ff_avf_avectorscope
const AVFilter ff_avf_avectorscope
Definition: avf_avectorscope.c:489
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
Definition: avf_avectorscope.c:288
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
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:152
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
POLAR
@ POLAR
Definition: avf_avectorscope.c:39
audio.h
avectorscope_options
static const AVOption avectorscope_options[]
Definition: avf_avectorscope.c:80
activate
static int activate(AVFilterContext *ctx)
Definition: avf_avectorscope.c:439
AudioVectorScopeContext::w
int w
Definition: avf_avectorscope.c:61
scale
static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition: intra.c:291
FF_FILTER_FORWARD_STATUS
FF_FILTER_FORWARD_STATUS(inlink, outlink)
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
AudioVectorScopeContext::prev_y
unsigned prev_y
Definition: avf_avectorscope.c:71
audiovectorscope_outputs
static const AVFilterPad audiovectorscope_outputs[]
Definition: avf_avectorscope.c:481
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60
src
#define src
Definition: vp8dsp.c:248
ff_filter_set_ready
void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
Mark a filter ready and schedule it for activation.
Definition: avfilter.c:239
Generated on Thu Oct 17 2024 19:22:24 for FFmpeg by   doxygen 1.8.17