FFmpeg
avf_avectorscope.c
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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 #include "internal.h"
36 
37 enum VectorScopeMode {
38  LISSAJOUS,
39  LISSAJOUS_XY,
40  POLAR,
41  MODE_NB,
42 };
43 
44 enum VectorScopeDraw {
45  DOT,
46  LINE,
47  AALINE,
48  DRAW_NB,
49 };
50 
51 enum VectorScopeScale {
52  LIN,
53  SQRT,
54  CBRT,
55  LOG,
56  SCALE_NB,
57 };
58 
59 typedef struct AudioVectorScopeContext {
60  const AVClass *class;
61  AVFrame *outpicref;
62  int w, h;
63  int hw, hh;
64  int mode;
65  int draw;
66  int scale;
67  int contrast[4];
68  int fade[4];
69  double zoom;
70  int swap;
71  int mirror;
72  unsigned prev_x, prev_y;
73  AVRational frame_rate;
74  int nb_samples;
75 } AudioVectorScopeContext;
76 
77 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
78 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
79 #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
80 
81 static const AVOption avectorscope_options[] = {
82  { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, "mode" },
83  { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, "mode" },
84  { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, TFLAGS, "mode" },
85  { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, TFLAGS, "mode" },
86  { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, TFLAGS, "mode" },
87  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
88  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
89  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
90  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
91  { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, TFLAGS },
92  { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, TFLAGS },
93  { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, TFLAGS },
94  { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, TFLAGS },
95  { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, TFLAGS },
96  { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, TFLAGS },
97  { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
98  { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, TFLAGS },
99  { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, TFLAGS },
100  { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, TFLAGS, "draw" },
101  { "dot", "draw dots", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, TFLAGS, "draw" },
102  { "line", "draw lines", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, TFLAGS, "draw" },
103  { "aaline","draw anti-aliased lines", 0, AV_OPT_TYPE_CONST, {.i64=AALINE},0,0, TFLAGS, "draw" },
104  { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, TFLAGS, "scale" },
105  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, TFLAGS, "scale" },
106  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, TFLAGS, "scale" },
107  { "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, TFLAGS, "scale" },
108  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, TFLAGS, "scale" },
109  { "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, TFLAGS },
110  { "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, TFLAGS, "mirror" },
111  { "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, TFLAGS, "mirror" },
112  { "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, TFLAGS, "mirror" },
113  { "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, TFLAGS, "mirror" },
114  { "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, TFLAGS, "mirror" },
115  { NULL }
116 };
117 
118 AVFILTER_DEFINE_CLASS(avectorscope);
119 
120 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y, int value)
121 {
122  const ptrdiff_t linesize = s->outpicref->linesize[0];
123  uint8_t *dst;
124 
125  if (s->zoom > 1) {
126  if (y >= s->h || x >= s->w)
127  return;
128  } else {
129  y = FFMIN(y, s->h - 1);
130  x = FFMIN(x, s->w - 1);
131  }
132 
133  dst = s->outpicref->data[0] + y * linesize + x * 4;
134  dst[0] = FFMIN(dst[0] + s->contrast[0], value);
135  dst[1] = FFMIN(dst[1] + s->contrast[1], value);
136  dst[2] = FFMIN(dst[2] + s->contrast[2], value);
137  dst[3] = FFMIN(dst[3] + s->contrast[3], value);
138 }
139 
140 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
141 {
142  int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
143  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
144  int err = (dx>dy ? dx : -dy) / 2, e2;
145 
146  for (;;) {
147  draw_dot(s, x0, y0, 255);
148 
149  if (x0 == x1 && y0 == y1)
150  break;
151 
152  e2 = err;
153 
154  if (e2 >-dx) {
155  err -= dy;
156  x0 += sx;
157  }
158 
159  if (e2 < dy) {
160  err += dx;
161  y0 += sy;
162  }
163  }
164 }
165 
166 static void draw_aaline(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
167 {
168  int sx = x0 < x1 ? 1 : -1, sy = y0 < y1 ? 1 : -1, x2;
169  int dx = FFABS(x1-x0), dy = FFABS(y1-y0), err = dx * dx + dy * dy;
170  int e2 = err == 0 ? 1 : 0xffffff / (dx + dy);
171 
172  dx *= e2;
173  dy *= e2;
174  err = dx - dy;
175 
176  for (;;) {
177  draw_dot(s, x0, y0, 255-(FFABS(err - dx + dy) >> 16));
178  e2 = err;
179  x2 = x0;
180  if (2 * e2 >= -dx) {
181  if (x0 == x1)
182  break;
183  if (e2 + dy < 0xff0000)
184  draw_dot(s, x0, y0 + sy, 255-((e2 + dy) >> 16));
185  err -= dy;
186  x0 += sx;
187  }
188 
189  if (2 * e2 <= dy) {
190  if (y0 == y1)
191  break;
192  if (dx - e2 < 0xff0000)
193  draw_dot(s, x2 + sx, y0, 255-((dx - e2) >> 16));
194  err += dx;
195  y0 += sy;
196  }
197  }
198 }
199 
200 static int fade(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
201 {
202  AudioVectorScopeContext *s = ctx->priv;
203  const int linesize = s->outpicref->linesize[0];
204  const int height = s->outpicref->height;
205  const int slice_start = (height * jobnr ) / nb_jobs;
206  const int slice_end = (height * (jobnr+1)) / nb_jobs;
207 
208  if (s->fade[0] == 255 && s->fade[1] == 255 && s->fade[2] == 255) {
209  for (int i = slice_start; i < slice_end; i++)
210  memset(s->outpicref->data[0] + i * linesize, 0, s->outpicref->width * 4);
211  return 0;
212  }
213 
214  if (s->fade[0] || s->fade[1] || s->fade[2]) {
215  uint8_t *d = s->outpicref->data[0] + slice_start * linesize;
216  for (int i = slice_start; i < slice_end; i++) {
217  for (int j = 0; j < s->w*4; j+=4) {
218  if (d[j+0])
219  d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
220  if (d[j+1])
221  d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
222  if (d[j+2])
223  d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
224  if (d[j+3])
225  d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
226  }
227  d += linesize;
228  }
229  }
230 
231  return 0;
232 }
233 
234 static int query_formats(AVFilterContext *ctx)
235 {
236  AVFilterFormats *formats = NULL;
237  AVFilterChannelLayouts *layout = NULL;
238  AVFilterLink *inlink = ctx->inputs[0];
239  AVFilterLink *outlink = ctx->outputs[0];
240  static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
241  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
242  int ret;
243 
244  formats = ff_make_format_list(sample_fmts);
245  if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 ||
246  (ret = ff_add_channel_layout (&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
247  (ret = ff_channel_layouts_ref (layout , &inlink->outcfg.channel_layouts)) < 0)
248  return ret;
249 
250  formats = ff_all_samplerates();
251  if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
252  return ret;
253 
254  formats = ff_make_format_list(pix_fmts);
255  if ((ret = ff_formats_ref(formats, &outlink->incfg.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 
275  outlink->w = s->w;
276  outlink->h = s->h;
277  outlink->sample_aspect_ratio = (AVRational){1,1};
278  outlink->frame_rate = s->frame_rate;
279  outlink->time_base = av_inv_q(outlink->frame_rate);
280 
281  s->prev_x = s->hw = s->w / 2;
282  s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
283 
284  return 0;
285 }
286 
287 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
288 {
289  AVFilterContext *ctx = inlink->dst;
290  AVFilterLink *outlink = ctx->outputs[0];
291  const int16_t *samples = (const int16_t *)insamples->data[0];
292  const float *samplesf = (const float *)insamples->data[0];
293  AudioVectorScopeContext *s = ctx->priv;
294  const int hw = s->hw;
295  const int hh = s->hh;
296  AVFrame *clone;
297  unsigned x, y;
298  unsigned prev_x = s->prev_x, prev_y = s->prev_y;
299  double zoom = s->zoom;
300  int ret;
301 
302  if (!s->outpicref || s->outpicref->width != outlink->w ||
303  s->outpicref->height != outlink->h) {
304  av_frame_free(&s->outpicref);
305  s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
306  if (!s->outpicref) {
307  av_frame_free(&insamples);
308  return AVERROR(ENOMEM);
309  }
310 
311  s->outpicref->sample_aspect_ratio = (AVRational){1,1};
312  for (int i = 0; i < outlink->h; i++)
313  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
314  }
315  s->outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
316  s->outpicref->duration = 1;
317 
318  ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
319  if (ret < 0) {
320  av_frame_free(&insamples);
321  return ret;
322  }
323  ff_filter_execute(ctx, fade, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
324 
325  if (zoom < 1) {
326  float max = 0;
327 
328  switch (insamples->format) {
329  case AV_SAMPLE_FMT_S16:
330  for (int i = 0; i < insamples->nb_samples * 2; i++) {
331  float sample = samples[i] / (float)INT16_MAX;
332  max = FFMAX(FFABS(sample), max);
333  }
334  break;
335  case AV_SAMPLE_FMT_FLT:
336  for (int i = 0; i < insamples->nb_samples * 2; i++) {
337  max = FFMAX(FFABS(samplesf[i]), max);
338  }
339  break;
340  default:
341  av_assert2(0);
342  }
343 
344  switch (s->scale) {
345  case SQRT:
346  max = sqrtf(max);
347  break;
348  case CBRT:
349  max = cbrtf(max);
350  break;
351  case LOG:
352  max = logf(1 + max) / logf(2);
353  break;
354  }
355 
356  if (max > 0.f)
357  zoom = 1. / max;
358  }
359 
360  for (int i = 0; i < insamples->nb_samples; i++) {
361  float src[2];
362 
363  switch (insamples->format) {
364  case AV_SAMPLE_FMT_S16:
365  src[0] = samples[i*2+0] / (float)INT16_MAX;
366  src[1] = samples[i*2+1] / (float)INT16_MAX;
367  break;
368  case AV_SAMPLE_FMT_FLT:
369  src[0] = samplesf[i*2+0];
370  src[1] = samplesf[i*2+1];
371  break;
372  default:
373  av_assert2(0);
374  }
375 
376  switch (s->scale) {
377  case SQRT:
378  src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
379  src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
380  break;
381  case CBRT:
382  src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
383  src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
384  break;
385  case LOG:
386  src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
387  src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
388  break;
389  }
390 
391  if (s->mirror & 1)
392  src[0] = -src[0];
393 
394  if (s->mirror & 2)
395  src[1] = -src[1];
396 
397  if (s->swap)
398  FFSWAP(float, src[0], src[1]);
399 
400  if (s->mode == LISSAJOUS) {
401  x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
402  y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
403  } else if (s->mode == LISSAJOUS_XY) {
404  x = (src[1] * zoom + 1) * hw;
405  y = (src[0] * zoom + 1) * hh;
406  } else {
407  float sx, sy, cx, cy;
408 
409  sx = src[1] * zoom;
410  sy = src[0] * zoom;
411  cx = sx * sqrtf(1 - 0.5 * sy * sy);
412  cy = sy * sqrtf(1 - 0.5 * sx * sx);
413  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
414  y = s->h - s->h * fabsf(cx + cy) * .7;
415  }
416 
417  if (s->draw == DOT) {
418  draw_dot(s, x, y, 255);
419  } else if (s->draw == LINE) {
420  draw_line(s, x, y, prev_x, prev_y);
421  } else {
422  draw_aaline(s, x, y, prev_x, prev_y);
423  }
424  prev_x = x;
425  prev_y = y;
426  }
427 
428  s->prev_x = x, s->prev_y = y;
429  av_frame_free(&insamples);
430 
431  clone = av_frame_clone(s->outpicref);
432  if (!clone)
433  return AVERROR(ENOMEM);
434 
435  return ff_filter_frame(outlink, clone);
436 }
437 
438 static int activate(AVFilterContext *ctx)
439 {
440  AVFilterLink *inlink = ctx->inputs[0];
441  AVFilterLink *outlink = ctx->outputs[0];
442  AudioVectorScopeContext *s = ctx->priv;
443  AVFrame *in;
444  int ret;
445 
446  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
447 
448  ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
449  if (ret < 0)
450  return ret;
451  if (ret > 0)
452  return filter_frame(inlink, in);
453 
454  if (ff_inlink_queued_samples(inlink) >= s->nb_samples) {
455  ff_filter_set_ready(ctx, 10);
456  return 0;
457  }
458 
459  FF_FILTER_FORWARD_STATUS(inlink, outlink);
460  FF_FILTER_FORWARD_WANTED(outlink, inlink);
461 
462  return FFERROR_NOT_READY;
463 }
464 
465 static av_cold void uninit(AVFilterContext *ctx)
466 {
467  AudioVectorScopeContext *s = ctx->priv;
468 
469  av_frame_free(&s->outpicref);
470 }
471 
472 static const AVFilterPad audiovectorscope_inputs[] = {
473  {
474  .name = "default",
475  .type = AVMEDIA_TYPE_AUDIO,
476  .config_props = config_input,
477  },
478 };
479 
480 static const AVFilterPad audiovectorscope_outputs[] = {
481  {
482  .name = "default",
483  .type = AVMEDIA_TYPE_VIDEO,
484  .config_props = config_output,
485  },
486 };
487 
488 const AVFilter ff_avf_avectorscope = {
489  .name = "avectorscope",
490  .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
491  .uninit = uninit,
492  .priv_size = sizeof(AudioVectorScopeContext),
493  .activate = activate,
494  FILTER_INPUTS(audiovectorscope_inputs),
495  FILTER_OUTPUTS(audiovectorscope_outputs),
496  FILTER_QUERY_FUNC(query_formats),
497  .priv_class = &avectorscope_class,
498  .flags = AVFILTER_FLAG_SLICE_THREADS,
499  .process_command = ff_filter_process_command,
500 };
AudioVectorScopeContext::draw
int draw
Definition: avf_avectorscope.c:65
formats
formats
Definition: signature.h:48
TFLAGS
#define TFLAGS
Definition: avf_avectorscope.c:79
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:108
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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:401
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:377
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:947
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:612
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
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:1696
DRAW_NB
@ DRAW_NB
Definition: avf_avectorscope.c:48
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
VectorScopeScale
VectorScopeScale
Definition: avf_avectorscope.c:51
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:169
AudioVectorScopeContext::frame_rate
AVRational frame_rate
Definition: avf_avectorscope.c:73
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:170
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:199
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
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:200
LISSAJOUS_XY
@ LISSAJOUS_XY
Definition: avf_avectorscope.c:39
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:412
AudioVectorScopeContext::hw
int hw
Definition: avf_avectorscope.c:63
FFSIGN
#define FFSIGN(a)
Definition: common.h:66
AudioVectorScopeContext::hh
int hh
Definition: avf_avectorscope.c:63
OFFSET
#define OFFSET(x)
Definition: avf_avectorscope.c:77
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
fabsf
static __device__ float fabsf(float a)
Definition: cuda_runtime.h:181
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:47
LIN
@ LIN
Definition: avf_avectorscope.c:52
CBRT
@ CBRT
Definition: avf_avectorscope.c:54
avassert.h
av_cold
#define av_cold
Definition: attributes.h:90
AudioVectorScopeContext::fade
int fade[4]
Definition: avf_avectorscope.c:68
SQRT
@ SQRT
Definition: avf_avectorscope.c:53
float
float
Definition: af_crystalizer.c:121
AudioVectorScopeContext::nb_samples
int nb_samples
Definition: avf_avectorscope.c:74
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
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:617
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2015
AudioVectorScopeContext::contrast
int contrast[4]
Definition: avf_avectorscope.c:67
AudioVectorScopeContext::mode
int mode
Definition: avf_avectorscope.c:64
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:297
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:609
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
AudioVectorScopeContext::zoom
double zoom
Definition: avf_avectorscope.c:69
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:192
draw_line
static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
Definition: avf_avectorscope.c:140
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
ff_inlink_make_frame_writable
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1427
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:65
draw_aaline
static void draw_aaline(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
Definition: avf_avectorscope.c:166
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
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:1402
NULL
#define NULL
Definition: coverity.c:32
LOG
@ LOG
Definition: avf_avectorscope.c:55
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
offset must point to two consecutive integers
Definition: opt.h:235
AudioVectorScopeContext::mirror
int mirror
Definition: avf_avectorscope.c:71
DOT
@ DOT
Definition: avf_avectorscope.c:45
VectorScopeDraw
VectorScopeDraw
Definition: avf_avectorscope.c:44
parseutils.h
AudioVectorScopeContext::prev_x
unsigned prev_x
Definition: avf_avectorscope.c:72
sqrtf
static __device__ float sqrtf(float a)
Definition: cuda_runtime.h:184
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:487
LISSAJOUS
@ LISSAJOUS
Definition: avf_avectorscope.c:38
AudioVectorScopeContext::h
int h
Definition: avf_avectorscope.c:62
AudioVectorScopeContext
Definition: avf_avectorscope.c:59
mirror
static void mirror(const float *modifier, float *vec)
Definition: vf_v360.c:4090
f
f
Definition: af_crystalizer.c:121
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:106
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:301
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:427
LINE
@ LINE
Definition: avf_avectorscope.c:46
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:851
height
#define height
FF_FILTER_FORWARD_WANTED
FF_FILTER_FORWARD_WANTED(outlink, inlink)
audiovectorscope_inputs
static const AVFilterPad audiovectorscope_inputs[]
Definition: avf_avectorscope.c:472
draw
static int draw(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showcwt.c:443
AudioVectorScopeContext::swap
int swap
Definition: avf_avectorscope.c:70
internal.h
AudioVectorScopeContext::scale
int scale
Definition: avf_avectorscope.c:66
layout
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 layout
Definition: filter_design.txt:18
draw_dot
static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y, int value)
Definition: avf_avectorscope.c:120
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:420
MODE_NB
@ MODE_NB
Definition: avf_avectorscope.c:41
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:244
FLAGS
#define FLAGS
Definition: avf_avectorscope.c:78
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:786
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
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:61
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: internal.h:53
ff_inlink_queued_samples
int ff_inlink_queued_samples(AVFilterLink *link)
Definition: avfilter.c:1362
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
AVFilter
Filter definition.
Definition: avfilter.h:166
VectorScopeMode
VectorScopeMode
Definition: avf_avectorscope.c:37
ret
ret
Definition: filter_design.txt:187
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
AALINE
@ AALINE
Definition: avf_avectorscope.c:47
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:572
channel_layout.h
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:56
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_avectorscope.c:465
ff_avf_avectorscope
const AVFilter ff_avf_avectorscope
Definition: avf_avectorscope.c:488
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:287
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
POLAR
@ POLAR
Definition: avf_avectorscope.c:40
audio.h
AVFilterFormatsConfig::formats
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:505
avectorscope_options
static const AVOption avectorscope_options[]
Definition: avf_avectorscope.c:81
activate
static int activate(AVFilterContext *ctx)
Definition: avf_avectorscope.c:438
AudioVectorScopeContext::w
int w
Definition: avf_avectorscope.c:62
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_avectorscope.c:234
FF_FILTER_FORWARD_STATUS
FF_FILTER_FORWARD_STATUS(inlink, outlink)
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:193
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
AudioVectorScopeContext::prev_y
unsigned prev_y
Definition: avf_avectorscope.c:72
d
d
Definition: ffmpeg_filter.c:331
audiovectorscope_outputs
static const AVFilterPad audiovectorscope_outputs[]
Definition: avf_avectorscope.c:480
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:144
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60
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:216
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