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 #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  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, "mode" },
82  { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, TFLAGS, "mode" },
83  { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, TFLAGS, "mode" },
84  { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, TFLAGS, "mode" },
85  { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, TFLAGS, "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, "draw" },
100  { "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, TFLAGS, "draw" },
101  { "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, TFLAGS, "draw" },
102  { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, TFLAGS, "scale" },
103  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, TFLAGS, "scale" },
104  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, TFLAGS, "scale" },
105  { "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, TFLAGS, "scale" },
106  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, TFLAGS, "scale" },
107  { "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, TFLAGS },
108  { "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, TFLAGS, "mirror" },
109  { "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, TFLAGS, "mirror" },
110  { "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, TFLAGS, "mirror" },
111  { "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, TFLAGS, "mirror" },
112  { "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, TFLAGS, "mirror" },
113  { NULL }
114 };
115 
116 AVFILTER_DEFINE_CLASS(avectorscope);
117 
118 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
119 {
120  const int linesize = s->outpicref->linesize[0];
121  uint8_t *dst;
122 
123  if (s->zoom > 1) {
124  if (y >= s->h || x >= s->w)
125  return;
126  } else {
127  y = FFMIN(y, s->h - 1);
128  x = FFMIN(x, s->w - 1);
129  }
130 
131  dst = &s->outpicref->data[0][y * linesize + x * 4];
132  dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
133  dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
134  dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
135  dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
136 }
137 
138 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
139 {
140  int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
141  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
142  int err = (dx>dy ? dx : -dy) / 2, e2;
143 
144  for (;;) {
145  draw_dot(s, x0, y0);
146 
147  if (x0 == x1 && y0 == y1)
148  break;
149 
150  e2 = err;
151 
152  if (e2 >-dx) {
153  err -= dy;
154  x0 += sx;
155  }
156 
157  if (e2 < dy) {
158  err += dx;
159  y0 += sy;
160  }
161  }
162 }
163 
164 static int fade(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
165 {
166  AudioVectorScopeContext *s = ctx->priv;
167  const int linesize = s->outpicref->linesize[0];
168  const int height = s->outpicref->height;
169  const int slice_start = (height * jobnr ) / nb_jobs;
170  const int slice_end = (height * (jobnr+1)) / nb_jobs;
171 
172  if (s->fade[0] == 255 && s->fade[1] == 255 && s->fade[2] == 255) {
173  for (int i = slice_start; i < slice_end; i++)
174  memset(s->outpicref->data[0] + i * linesize, 0, s->outpicref->width * 4);
175  return 0;
176  }
177 
178  if (s->fade[0] || s->fade[1] || s->fade[2]) {
179  uint8_t *d = s->outpicref->data[0] + slice_start * linesize;
180  for (int i = slice_start; i < slice_end; i++) {
181  for (int j = 0; j < s->w*4; j+=4) {
182  if (d[j+0])
183  d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
184  if (d[j+1])
185  d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
186  if (d[j+2])
187  d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
188  if (d[j+3])
189  d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
190  }
191  d += linesize;
192  }
193  }
194 
195  return 0;
196 }
197 
198 static int query_formats(AVFilterContext *ctx)
199 {
200  AVFilterFormats *formats = NULL;
201  AVFilterChannelLayouts *layout = NULL;
202  AVFilterLink *inlink = ctx->inputs[0];
203  AVFilterLink *outlink = ctx->outputs[0];
204  static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
205  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
206  int ret;
207 
208  formats = ff_make_format_list(sample_fmts);
209  if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 ||
210  (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
211  (ret = ff_channel_layouts_ref (layout , &inlink->outcfg.channel_layouts)) < 0)
212  return ret;
213 
214  formats = ff_all_samplerates();
215  if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
216  return ret;
217 
218  formats = ff_make_format_list(pix_fmts);
219  if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
220  return ret;
221 
222  return 0;
223 }
224 
225 static int config_input(AVFilterLink *inlink)
226 {
227  AVFilterContext *ctx = inlink->dst;
228  AudioVectorScopeContext *s = ctx->priv;
229 
230  s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
231 
232  return 0;
233 }
234 
235 static int config_output(AVFilterLink *outlink)
236 {
237  AudioVectorScopeContext *s = outlink->src->priv;
238 
239  outlink->w = s->w;
240  outlink->h = s->h;
241  outlink->sample_aspect_ratio = (AVRational){1,1};
242  outlink->frame_rate = s->frame_rate;
243 
244  s->prev_x = s->hw = s->w / 2;
245  s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
246 
247  return 0;
248 }
249 
250 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
251 {
252  AVFilterContext *ctx = inlink->dst;
253  AVFilterLink *outlink = ctx->outputs[0];
254  AudioVectorScopeContext *s = ctx->priv;
255  const int hw = s->hw;
256  const int hh = s->hh;
257  AVFrame *clone;
258  unsigned x, y;
259  unsigned prev_x = s->prev_x, prev_y = s->prev_y;
260  double zoom = s->zoom;
261  int i;
262 
263  if (!s->outpicref || s->outpicref->width != outlink->w ||
264  s->outpicref->height != outlink->h) {
265  av_frame_free(&s->outpicref);
266  s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
267  if (!s->outpicref) {
268  av_frame_free(&insamples);
269  return AVERROR(ENOMEM);
270  }
271 
272  s->outpicref->sample_aspect_ratio = (AVRational){1,1};
273  for (i = 0; i < outlink->h; i++)
274  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
275  }
276  s->outpicref->pts = insamples->pts;
277 
278  ff_filter_execute(ctx, fade, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
279 
280  if (zoom < 1) {
281  float max = 0;
282 
283  switch (insamples->format) {
284  case AV_SAMPLE_FMT_S16: {
285  int16_t *samples = (int16_t *)insamples->data[0];
286 
287  for (i = 0; i < insamples->nb_samples * 2; i++) {
288  float sample = samples[i] / (float)INT16_MAX;
289  max = FFMAX(FFABS(sample), max);
290  }
291 
292  }
293  break;
294  case AV_SAMPLE_FMT_FLT: {
295  float *samples = (float *)insamples->data[0];
296 
297  for (i = 0; i < insamples->nb_samples * 2; i++) {
298  max = FFMAX(FFABS(samples[i]), max);
299  }
300  }
301  break;
302  default:
303  av_assert2(0);
304  }
305 
306  switch (s->scale) {
307  case SQRT:
308  max = sqrtf(max);
309  break;
310  case CBRT:
311  max = cbrtf(max);
312  break;
313  case LOG:
314  max = logf(1 + max) / logf(2);
315  break;
316  }
317 
318  zoom = 1. / max;
319  }
320 
321  for (i = 0; i < insamples->nb_samples; i++) {
322  int16_t *samples = (int16_t *)insamples->data[0] + i * 2;
323  float *samplesf = (float *)insamples->data[0] + i * 2;
324  float src[2];
325 
326  switch (insamples->format) {
327  case AV_SAMPLE_FMT_S16:
328  src[0] = samples[0] / (float)INT16_MAX;
329  src[1] = samples[1] / (float)INT16_MAX;
330  break;
331  case AV_SAMPLE_FMT_FLT:
332  src[0] = samplesf[0];
333  src[1] = samplesf[1];
334  break;
335  default:
336  av_assert2(0);
337  }
338 
339  switch (s->scale) {
340  case SQRT:
341  src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
342  src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
343  break;
344  case CBRT:
345  src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
346  src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
347  break;
348  case LOG:
349  src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
350  src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
351  break;
352  }
353 
354  if (s->mirror & 1)
355  src[0] = -src[0];
356 
357  if (s->mirror & 2)
358  src[1] = -src[1];
359 
360  if (s->swap)
361  FFSWAP(float, src[0], src[1]);
362 
363  if (s->mode == LISSAJOUS) {
364  x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
365  y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
366  } else if (s->mode == LISSAJOUS_XY) {
367  x = (src[1] * zoom + 1) * hw;
368  y = (src[0] * zoom + 1) * hh;
369  } else {
370  float sx, sy, cx, cy;
371 
372  sx = src[1] * zoom;
373  sy = src[0] * zoom;
374  cx = sx * sqrtf(1 - 0.5 * sy * sy);
375  cy = sy * sqrtf(1 - 0.5 * sx * sx);
376  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
377  y = s->h - s->h * fabsf(cx + cy) * .7;
378  }
379 
380  if (s->draw == DOT) {
381  draw_dot(s, x, y);
382  } else {
383  draw_line(s, x, y, prev_x, prev_y);
384  }
385  prev_x = x;
386  prev_y = y;
387  }
388 
389  s->prev_x = x, s->prev_y = y;
390  av_frame_free(&insamples);
391 
392  clone = av_frame_clone(s->outpicref);
393  if (!clone)
394  return AVERROR(ENOMEM);
395 
396  return ff_filter_frame(outlink, clone);
397 }
398 
399 static int activate(AVFilterContext *ctx)
400 {
401  AVFilterLink *inlink = ctx->inputs[0];
402  AVFilterLink *outlink = ctx->outputs[0];
403  AudioVectorScopeContext *s = ctx->priv;
404  AVFrame *in;
405  int ret;
406 
407  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
408 
409  ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
410  if (ret < 0)
411  return ret;
412  if (ret > 0)
413  return filter_frame(inlink, in);
414 
415  FF_FILTER_FORWARD_STATUS(inlink, outlink);
416  FF_FILTER_FORWARD_WANTED(outlink, inlink);
417 
418  return FFERROR_NOT_READY;
419 }
420 
421 static av_cold void uninit(AVFilterContext *ctx)
422 {
423  AudioVectorScopeContext *s = ctx->priv;
424 
425  av_frame_free(&s->outpicref);
426 }
427 
428 static const AVFilterPad audiovectorscope_inputs[] = {
429  {
430  .name = "default",
431  .type = AVMEDIA_TYPE_AUDIO,
432  .config_props = config_input,
433  },
434 };
435 
436 static const AVFilterPad audiovectorscope_outputs[] = {
437  {
438  .name = "default",
439  .type = AVMEDIA_TYPE_VIDEO,
440  .config_props = config_output,
441  },
442 };
443 
444 const AVFilter ff_avf_avectorscope = {
445  .name = "avectorscope",
446  .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
447  .uninit = uninit,
448  .priv_size = sizeof(AudioVectorScopeContext),
449  .activate = activate,
450  FILTER_INPUTS(audiovectorscope_inputs),
451  FILTER_OUTPUTS(audiovectorscope_outputs),
452  FILTER_QUERY_FUNC(query_formats),
453  .priv_class = &avectorscope_class,
454  .flags = AVFILTER_FLAG_SLICE_THREADS,
455  .process_command = ff_filter_process_command,
456 };
AudioVectorScopeContext::draw
int draw
Definition: avf_avectorscope.c:64
formats
formats
Definition: signature.h:48
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:98
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:381
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1018
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:550
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:237
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:1629
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:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
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:396
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:247
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:168
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:153
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:317
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:164
LISSAJOUS_XY
@ LISSAJOUS_XY
Definition: avf_avectorscope.c:39
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:401
AudioVectorScopeContext::hw
int hw
Definition: avf_avectorscope.c:62
FFSIGN
#define FFSIGN(a)
Definition: common.h:66
AudioVectorScopeContext::hh
int hh
Definition: avf_avectorscope.c:62
OFFSET
#define OFFSET(x)
Definition: avf_avectorscope.c:76
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1376
fabsf
static __device__ float fabsf(float a)
Definition: cuda_runtime.h:181
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:50
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
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:426
AudioVectorScopeContext::nb_samples
int nb_samples
Definition: avf_avectorscope.c:73
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:226
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:555
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2041
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:290
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:424
AudioVectorScopeContext::zoom
double zoom
Definition: avf_avectorscope.c:68
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:191
draw_line
static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
Definition: avf_avectorscope.c:138
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
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
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:1436
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:225
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:234
AudioVectorScopeContext::mirror
int mirror
Definition: avf_avectorscope.c:70
DOT
@ DOT
Definition: avf_avectorscope.c:45
VectorScopeDraw
VectorScopeDraw
Definition: avf_avectorscope.c:44
src
#define src
Definition: vp8dsp.c:255
parseutils.h
AudioVectorScopeContext::prev_x
unsigned prev_x
Definition: avf_avectorscope.c:71
LISSAJOUS
@ LISSAJOUS
Definition: avf_avectorscope.c:38
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
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:4123
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_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
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:376
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:882
height
#define height
FF_FILTER_FORWARD_WANTED
FF_FILTER_FORWARD_WANTED(outlink, inlink)
audiovectorscope_inputs
static const AVFilterPad audiovectorscope_inputs[]
Definition: avf_avectorscope.c:428
AudioVectorScopeContext::swap
int swap
Definition: avf_avectorscope.c:69
internal.h
AudioVectorScopeContext::scale
int scale
Definition: avf_avectorscope.c:65
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
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:369
MODE_NB
@ MODE_NB
Definition: avf_avectorscope.c:41
draw_dot
static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
Definition: avf_avectorscope.c:118
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
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:803
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
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:61
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(avectorscope)
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:56
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:128
AVFilter
Filter definition.
Definition: avfilter.h:149
VectorScopeMode
VectorScopeMode
Definition: avf_avectorscope.c:37
ret
ret
Definition: filter_design.txt:187
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:510
channel_layout.h
mode
mode
Definition: ebur128.h:83
config_output
static int config_output(AVFilterLink *outlink)
Definition: avf_avectorscope.c:235
SCALE_NB
@ SCALE_NB
Definition: avf_avectorscope.c:55
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_avectorscope.c:421
ff_avf_avectorscope
const AVFilter ff_avf_avectorscope
Definition: avf_avectorscope.c:444
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:250
AVFilterContext
An instance of a filter.
Definition: avfilter.h:386
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:121
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:490
avectorscope_options
static const AVOption avectorscope_options[]
Definition: avf_avectorscope.c:80
activate
static int activate(AVFilterContext *ctx)
Definition: avf_avectorscope.c:399
AudioVectorScopeContext::w
int w
Definition: avf_avectorscope.c:61
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_avectorscope.c:198
FF_FILTER_FORWARD_STATUS
FF_FILTER_FORWARD_STATUS(inlink, outlink)
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:192
AudioVectorScopeContext::prev_y
unsigned prev_y
Definition: avf_avectorscope.c:71
d
d
Definition: ffmpeg_filter.c:156
audiovectorscope_outputs
static const AVFilterPad audiovectorscope_outputs[]
Definition: avf_avectorscope.c:436
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:143
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63
Generated on Fri Oct 15 2021 19:21:56 for FFmpeg by   doxygen 1.8.17