FFmpeg
vaf_spectrumsynth.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016 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  * SpectrumSynth filter
24  * @todo support float pixel format
25  */
26 
27 #include "libavutil/mem.h"
28 #include "libavutil/tx.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/cpu.h"
31 #include "libavutil/ffmath.h"
32 #include "libavutil/opt.h"
33 #include "avfilter.h"
34 #include "formats.h"
35 #include "audio.h"
36 #include "filters.h"
37 #include "window_func.h"
38 
42 
43 typedef struct SpectrumSynthContext {
44  const AVClass *class;
46  int channels;
47  int scale;
48  int sliding;
49  int win_func;
50  float overlap;
52 
54  AVTXContext *fft; ///< Fast Fourier Transform context
56  AVComplexFloat **fft_in; ///< bins holder for each (displayed) channels
57  AVComplexFloat **fft_out; ///< bins holder for each (displayed) channels
58  int win_size;
59  int size;
60  int nb_freq;
61  int hop_size;
62  int start, end;
63  int xpos;
64  int xend;
66  float factor;
68  float *window_func_lut; ///< Window function LUT
70 
71 #define OFFSET(x) offsetof(SpectrumSynthContext, x)
72 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
73 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
74 
75 static const AVOption spectrumsynth_options[] = {
76  { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 15, INT_MAX, A },
77  { "channels", "set channels", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 1}, 1, 8, A },
78  { "scale", "set input amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = LOG}, 0, NB_SCALES-1, V, .unit = "scale" },
79  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, V, .unit = "scale" },
80  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, V, .unit = "scale" },
81  { "slide", "set input sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = FULLFRAME}, 0, NB_SLIDES-1, V, .unit = "slide" },
82  { "replace", "consume old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, V, .unit = "slide" },
83  { "scroll", "consume only most right column", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, V, .unit = "slide" },
84  { "fullframe", "consume full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, V, .unit = "slide" },
85  { "rscroll", "consume only most left column", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, V, .unit = "slide" },
86  WIN_FUNC_OPTION("win_func", OFFSET(win_func), A, 0),
87  { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, A },
88  { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, V, .unit = "orientation" },
89  { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, V, .unit = "orientation" },
90  { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, V, .unit = "orientation" },
91  { NULL }
92 };
93 
94 AVFILTER_DEFINE_CLASS(spectrumsynth);
95 
96 enum {
97  MAGNITUDE = 0,
98  PHASE = 1,
99 };
100 
102  AVFilterFormatsConfig **cfg_in,
103  AVFilterFormatsConfig **cfg_out)
104 {
105  const SpectrumSynthContext *s = ctx->priv;
109  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
112  int ret, sample_rates[] = { 48000, -1 };
113 
115  if ((ret = ff_formats_ref (formats, &cfg_out[0]->formats )) < 0 ||
116  (ret = ff_add_channel_layout (&layout, &FF_COUNT2LAYOUT(s->channels))) < 0 ||
117  (ret = ff_channel_layouts_ref (layout , &cfg_out[0]->channel_layouts)) < 0)
118  return ret;
119 
120  sample_rates[0] = s->sample_rate;
122  if (!formats)
123  return AVERROR(ENOMEM);
124  if ((ret = ff_formats_ref(formats, &cfg_out[0]->samplerates)) < 0)
125  return ret;
126 
128  if (!formats)
129  return AVERROR(ENOMEM);
130  if ((ret = ff_formats_ref(formats, &cfg_in[MAGNITUDE]->formats)) < 0)
131  return ret;
132 
134  if (!formats)
135  return AVERROR(ENOMEM);
136  if ((ret = ff_formats_ref(formats, &cfg_in[PHASE]->formats)) < 0)
137  return ret;
138 
139  return 0;
140 }
141 
142 static int config_output(AVFilterLink *outlink)
143 {
144  AVFilterContext *ctx = outlink->src;
145  SpectrumSynthContext *s = ctx->priv;
146  FilterLink *inl0 = ff_filter_link(ctx->inputs[0]);
147  FilterLink *inl1 = ff_filter_link(ctx->inputs[1]);
148  int width = ctx->inputs[0]->w;
149  int height = ctx->inputs[0]->h;
150  AVRational time_base = ctx->inputs[0]->time_base;
151  AVRational frame_rate = inl0->frame_rate;
152  float factor, overlap, scale;
153  int i, ch, ret;
154 
155  outlink->sample_rate = s->sample_rate;
156  outlink->time_base = (AVRational){1, s->sample_rate};
157 
158  if (width != ctx->inputs[1]->w ||
159  height != ctx->inputs[1]->h) {
161  "Magnitude and Phase sizes differ (%dx%d vs %dx%d).\n",
162  width, height,
163  ctx->inputs[1]->w, ctx->inputs[1]->h);
164  return AVERROR_INVALIDDATA;
165  } else if (av_cmp_q(time_base, ctx->inputs[1]->time_base) != 0) {
167  "Magnitude and Phase time bases differ (%d/%d vs %d/%d).\n",
168  time_base.num, time_base.den,
169  ctx->inputs[1]->time_base.num,
170  ctx->inputs[1]->time_base.den);
171  return AVERROR_INVALIDDATA;
172  } else if (av_cmp_q(frame_rate, inl1->frame_rate) != 0) {
174  "Magnitude and Phase framerates differ (%d/%d vs %d/%d).\n",
175  frame_rate.num, frame_rate.den,
176  inl1->frame_rate.num,
177  inl1->frame_rate.den);
178  return AVERROR_INVALIDDATA;
179  }
180 
181  s->size = s->orientation == VERTICAL ? height / s->channels : width / s->channels;
182  s->xend = s->orientation == VERTICAL ? width : height;
183 
184  s->win_size = s->size * 2;
185  s->nb_freq = s->size;
186 
187  ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 1, s->win_size, &scale, 0);
188  if (ret < 0) {
189  av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
190  "The window size might be too high.\n");
191  return ret;
192  }
193 
194  s->fft_in = av_calloc(s->channels, sizeof(*s->fft_in));
195  if (!s->fft_in)
196  return AVERROR(ENOMEM);
197  s->fft_out = av_calloc(s->channels, sizeof(*s->fft_out));
198  if (!s->fft_out)
199  return AVERROR(ENOMEM);
200 
201  for (ch = 0; ch < s->channels; ch++) {
202  s->fft_in[ch] = av_calloc(FFALIGN(s->win_size, av_cpu_max_align()), sizeof(**s->fft_in));
203  if (!s->fft_in[ch])
204  return AVERROR(ENOMEM);
205 
206  s->fft_out[ch] = av_calloc(FFALIGN(s->win_size, av_cpu_max_align()), sizeof(**s->fft_out));
207  if (!s->fft_out[ch])
208  return AVERROR(ENOMEM);
209  }
210 
211  s->buffer = ff_get_audio_buffer(outlink, s->win_size * 2);
212  if (!s->buffer)
213  return AVERROR(ENOMEM);
214 
215  /* pre-calc windowing function */
216  s->window_func_lut = av_realloc_f(s->window_func_lut, s->win_size,
217  sizeof(*s->window_func_lut));
218  if (!s->window_func_lut)
219  return AVERROR(ENOMEM);
220  generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
221  if (s->overlap == 1)
222  s->overlap = overlap;
223  s->hop_size = (1 - s->overlap) * s->win_size;
224  for (factor = 0, i = 0; i < s->win_size; i++) {
225  factor += s->window_func_lut[i] * s->window_func_lut[i];
226  }
227  s->factor = (factor / s->win_size) / FFMAX(1 / (1 - s->overlap) - 1, 1);
228 
229  return 0;
230 }
231 
233  int x, int y, int f, int ch)
234 {
235  const int m_linesize = s->magnitude->linesize[0];
236  const int p_linesize = s->phase->linesize[0];
237  const uint16_t *m = (uint16_t *)(s->magnitude->data[0] + y * m_linesize);
238  const uint16_t *p = (uint16_t *)(s->phase->data[0] + y * p_linesize);
239  float magnitude, phase;
240 
241  switch (s->scale) {
242  case LINEAR:
243  magnitude = m[x] / (double)UINT16_MAX;
244  break;
245  case LOG:
246  magnitude = ff_exp10(((m[x] / (double)UINT16_MAX) - 1.) * 6.);
247  break;
248  default:
249  av_assert0(0);
250  }
251  phase = ((p[x] / (double)UINT16_MAX) * 2. - 1.) * M_PI;
252 
253  s->fft_in[ch][f].re = magnitude * cos(phase);
254  s->fft_in[ch][f].im = magnitude * sin(phase);
255 }
256 
258  int x, int y, int f, int ch)
259 {
260  const int m_linesize = s->magnitude->linesize[0];
261  const int p_linesize = s->phase->linesize[0];
262  const uint8_t *m = (uint8_t *)(s->magnitude->data[0] + y * m_linesize);
263  const uint8_t *p = (uint8_t *)(s->phase->data[0] + y * p_linesize);
264  float magnitude, phase;
265 
266  switch (s->scale) {
267  case LINEAR:
268  magnitude = m[x] / (double)UINT8_MAX;
269  break;
270  case LOG:
271  magnitude = ff_exp10(((m[x] / (double)UINT8_MAX) - 1.) * 6.);
272  break;
273  default:
274  av_assert0(0);
275  }
276  phase = ((p[x] / (double)UINT8_MAX) * 2. - 1.) * M_PI;
277 
278  s->fft_in[ch][f].re = magnitude * cos(phase);
279  s->fft_in[ch][f].im = magnitude * sin(phase);
280 }
281 
282 static void read_fft_data(AVFilterContext *ctx, int x, int h, int ch)
283 {
284  SpectrumSynthContext *s = ctx->priv;
285  AVFilterLink *inlink = ctx->inputs[0];
286  int start = h * (s->channels - ch) - 1;
287  int end = h * (s->channels - ch - 1);
288  int y, f;
289 
290  switch (s->orientation) {
291  case VERTICAL:
292  switch (inlink->format) {
294  case AV_PIX_FMT_GRAY16:
295  for (y = start, f = 0; y >= end; y--, f++) {
296  read16_fft_bin(s, x, y, f, ch);
297  }
298  break;
299  case AV_PIX_FMT_YUVJ444P:
300  case AV_PIX_FMT_YUV444P:
301  case AV_PIX_FMT_GRAY8:
302  for (y = start, f = 0; y >= end; y--, f++) {
303  read8_fft_bin(s, x, y, f, ch);
304  }
305  break;
306  }
307  break;
308  case HORIZONTAL:
309  switch (inlink->format) {
311  case AV_PIX_FMT_GRAY16:
312  for (y = end, f = 0; y <= start; y++, f++) {
313  read16_fft_bin(s, y, x, f, ch);
314  }
315  break;
316  case AV_PIX_FMT_YUVJ444P:
317  case AV_PIX_FMT_YUV444P:
318  case AV_PIX_FMT_GRAY8:
319  for (y = end, f = 0; y <= start; y++, f++) {
320  read8_fft_bin(s, y, x, f, ch);
321  }
322  break;
323  }
324  break;
325  }
326 }
327 
328 static void synth_window(AVFilterContext *ctx, int x)
329 {
330  SpectrumSynthContext *s = ctx->priv;
331  const int h = s->size;
332  int nb = s->win_size;
333  int y, f, ch;
334 
335  for (ch = 0; ch < s->channels; ch++) {
336  read_fft_data(ctx, x, h, ch);
337 
338  for (y = h; y <= s->nb_freq; y++) {
339  s->fft_in[ch][y].re = 0;
340  s->fft_in[ch][y].im = 0;
341  }
342 
343  for (y = s->nb_freq + 1, f = s->nb_freq - 1; y < nb; y++, f--) {
344  s->fft_in[ch][y].re = s->fft_in[ch][f].re;
345  s->fft_in[ch][y].im = -s->fft_in[ch][f].im;
346  }
347 
348  s->tx_fn(s->fft, s->fft_out[ch], s->fft_in[ch], sizeof(AVComplexFloat));
349  }
350 }
351 
352 static int try_push_frame(AVFilterContext *ctx, int x)
353 {
354  SpectrumSynthContext *s = ctx->priv;
355  AVFilterLink *outlink = ctx->outputs[0];
356  const float factor = s->factor;
357  int ch, n, i, ret;
358  int start, end;
359  AVFrame *out;
360 
361  synth_window(ctx, x);
362 
363  for (ch = 0; ch < s->channels; ch++) {
364  float *buf = (float *)s->buffer->extended_data[ch];
365  int j, k;
366 
367  start = s->start;
368  end = s->end;
369  k = end;
370  for (i = 0, j = start; j < k && i < s->win_size; i++, j++) {
371  buf[j] += s->fft_out[ch][i].re;
372  }
373 
374  for (; i < s->win_size; i++, j++) {
375  buf[j] = s->fft_out[ch][i].re;
376  }
377 
378  start += s->hop_size;
379  end = j;
380 
381  if (start >= s->win_size) {
382  start -= s->win_size;
383  end -= s->win_size;
384 
385  if (ch == s->channels - 1) {
386  float *dst;
387  int c;
388 
389  out = ff_get_audio_buffer(outlink, s->win_size);
390  if (!out) {
391  av_frame_free(&s->magnitude);
392  av_frame_free(&s->phase);
393  return AVERROR(ENOMEM);
394  }
395 
396  out->pts = s->pts;
397  s->pts += s->win_size;
398  for (c = 0; c < s->channels; c++) {
399  dst = (float *)out->extended_data[c];
400  buf = (float *)s->buffer->extended_data[c];
401 
402  for (n = 0; n < s->win_size; n++) {
403  dst[n] = buf[n] * factor;
404  }
405  memmove(buf, buf + s->win_size, s->win_size * 4);
406  }
407 
408  ret = ff_filter_frame(outlink, out);
409  if (ret < 0)
410  return ret;
411  }
412  }
413  }
414 
415  s->start = start;
416  s->end = end;
417 
418  return 0;
419 }
420 
422 {
423  SpectrumSynthContext *s = ctx->priv;
424  int ret, x;
425 
426  if (!(s->magnitude && s->phase))
427  return 0;
428 
429  switch (s->sliding) {
430  case REPLACE:
431  ret = try_push_frame(ctx, s->xpos);
432  s->xpos++;
433  if (s->xpos >= s->xend)
434  s->xpos = 0;
435  break;
436  case SCROLL:
437  s->xpos = s->xend - 1;
438  ret = try_push_frame(ctx, s->xpos);
439  break;
440  case RSCROLL:
441  s->xpos = 0;
442  ret = try_push_frame(ctx, s->xpos);
443  break;
444  case FULLFRAME:
445  for (x = 0; x < s->xend; x++) {
446  ret = try_push_frame(ctx, x);
447  if (ret < 0)
448  break;
449  }
450  break;
451  default:
452  av_assert0(0);
453  }
454 
455  av_frame_free(&s->magnitude);
456  av_frame_free(&s->phase);
457  return ret;
458 }
459 
461 {
462  SpectrumSynthContext *s = ctx->priv;
463  AVFrame **staging[2] = { &s->magnitude, &s->phase };
464  int64_t pts;
465  int i, ret;
466 
468 
469  for (i = 0; i < 2; i++) {
470  if (*staging[i])
471  continue;
472  ret = ff_inlink_consume_frame(ctx->inputs[i], staging[i]);
473  if (ret < 0)
474  return ret;
475  if (ret) {
477  return try_push_frames(ctx);
478  }
479  }
480 
481  for (i = 0; i < 2; i++) {
482  if (ff_inlink_acknowledge_status(ctx->inputs[i], &ret, &pts)) {
483  ff_outlink_set_status(ctx->outputs[0], ret, pts);
484  ff_inlink_set_status(ctx->inputs[1 - i], ret);
485  return 0;
486  }
487  }
488 
489  if (ff_outlink_frame_wanted(ctx->outputs[0])) {
490  for (i = 0; i < 2; i++) {
491  if (!*staging[i])
492  ff_inlink_request_frame(ctx->inputs[i]);
493  }
494  }
495 
496  return FFERROR_NOT_READY;
497 }
498 
500 {
501  SpectrumSynthContext *s = ctx->priv;
502  int i;
503 
504  av_frame_free(&s->magnitude);
505  av_frame_free(&s->phase);
506  av_frame_free(&s->buffer);
507 
508  av_tx_uninit(&s->fft);
509 
510  if (s->fft_in) {
511  for (i = 0; i < s->channels; i++)
512  av_freep(&s->fft_in[i]);
513  }
514  if (s->fft_out) {
515  for (i = 0; i < s->channels; i++)
516  av_freep(&s->fft_out[i]);
517  }
518  av_freep(&s->fft_in);
519  av_freep(&s->fft_out);
520  av_freep(&s->window_func_lut);
521 }
522 
524  {
525  .name = "magnitude",
526  .type = AVMEDIA_TYPE_VIDEO,
527  },
528  {
529  .name = "phase",
530  .type = AVMEDIA_TYPE_VIDEO,
531  },
532 };
533 
535  {
536  .name = "default",
537  .type = AVMEDIA_TYPE_AUDIO,
538  .config_props = config_output,
539  },
540 };
541 
543  .name = "spectrumsynth",
544  .description = NULL_IF_CONFIG_SMALL("Convert input spectrum videos to audio output."),
545  .uninit = uninit,
546  .activate = activate,
547  .priv_size = sizeof(SpectrumSynthContext),
551  .priv_class = &spectrumsynth_class,
552 };
formats
formats
Definition: signature.h:47
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:98
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
try_push_frames
static int try_push_frames(AVFilterContext *ctx)
Definition: vaf_spectrumsynth.c:421
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
ff_exp10
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:435
out
FILE * out
Definition: movenc.c:55
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1025
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:673
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
SpectrumSynthContext::size
int size
Definition: vaf_spectrumsynth.c:59
SpectrumSynthContext::scale
int scale
Definition: vaf_spectrumsynth.c:47
AVTXContext
Definition: tx_priv.h:235
int64_t
long long int64_t
Definition: coverity.c:34
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
SCROLL
@ SCROLL
Definition: vaf_spectrumsynth.c:40
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
sample_rates
static const int sample_rates[]
Definition: dcaenc.h:34
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
MagnitudeScale
MagnitudeScale
Definition: vaf_spectrumsynth.c:39
AVOption
AVOption.
Definition: opt.h:429
AVComplexFloat
Definition: tx.h:27
WIN_FUNC_OPTION
#define WIN_FUNC_OPTION(win_func_opt_name, win_func_offset, flag, default_window_func)
Definition: window_func.h:37
SpectrumSynthContext
Definition: vaf_spectrumsynth.c:43
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:205
SpectrumSynthContext::buffer
AVFrame * buffer
Definition: vaf_spectrumsynth.c:67
av_tx_init
av_cold int av_tx_init(AVTXContext **ctx, av_tx_fn *tx, enum AVTXType type, int inv, int len, const void *scale, uint64_t flags)
Initialize a transform context with the given configuration (i)MDCTs with an odd length are currently...
Definition: tx.c:903
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
config_output
static int config_output(AVFilterLink *outlink)
Definition: vaf_spectrumsynth.c:142
ff_inlink_consume_frame
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
Definition: avfilter.c:1453
FF_FILTER_FORWARD_STATUS_BACK_ALL
#define FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, filter)
Forward the status on an output link to all input links.
Definition: filters.h:447
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(spectrumsynth)
SpectrumSynthContext::end
int end
Definition: vaf_spectrumsynth.c:62
SpectrumSynthContext::fft
AVTXContext * fft
Fast Fourier Transform context.
Definition: vaf_spectrumsynth.c:54
pts
static int64_t pts
Definition: transcode_aac.c:644
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:462
SpectrumSynthContext::start
int start
Definition: vaf_spectrumsynth.c:62
SpectrumSynthContext::sliding
int sliding
Definition: vaf_spectrumsynth.c:48
AVRational::num
int num
Numerator.
Definition: rational.h:59
SpectrumSynthContext::window_func_lut
float * window_func_lut
Window function LUT.
Definition: vaf_spectrumsynth.c:68
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
SpectrumSynthContext::magnitude
AVFrame * magnitude
Definition: vaf_spectrumsynth.c:53
SpectrumSynthContext::sample_rate
int sample_rate
Definition: vaf_spectrumsynth.c:45
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
av_cold
#define av_cold
Definition: attributes.h:90
av_tx_fn
void(* av_tx_fn)(AVTXContext *s, void *out, void *in, ptrdiff_t stride)
Function pointer to a function to perform the transform.
Definition: tx.h:151
ff_outlink_set_status
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: filters.h:424
ff_inlink_request_frame
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1580
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:491
Orientation
Orientation
Definition: avf_showspectrum.c:56
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
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
NB_SLIDES
@ NB_SLIDES
Definition: vaf_spectrumsynth.c:40
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:304
AV_TX_FLOAT_FFT
@ AV_TX_FLOAT_FFT
Standard complex to complex FFT with sample data type of AVComplexFloat, AVComplexDouble or AVComplex...
Definition: tx.h:47
ctx
AVFormatContext * ctx
Definition: movenc.c:49
channels
channels
Definition: aptx.h:31
synth_window
static void synth_window(AVFilterContext *ctx, int x)
Definition: vaf_spectrumsynth.c:328
A
#define A
Definition: vaf_spectrumsynth.c:72
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:87
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: vaf_spectrumsynth.c:101
OFFSET
#define OFFSET(x)
Definition: vaf_spectrumsynth.c:71
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:32
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
NULL
#define NULL
Definition: coverity.c:32
ff_vaf_spectrumsynth
const AVFilter ff_vaf_spectrumsynth
Definition: vaf_spectrumsynth.c:542
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
double
double
Definition: af_crystalizer.c:132
av_cpu_max_align
size_t av_cpu_max_align(void)
Get the maximum data alignment that may be required by FFmpeg.
Definition: cpu.c:276
generate_window_func
static void generate_window_func(float *lut, int N, int win_func, float *overlap)
Definition: window_func.h:63
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:81
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:521
try_push_frame
static int try_push_frame(AVFilterContext *ctx, int x)
Definition: vaf_spectrumsynth.c:352
ff_inlink_acknowledge_status
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1400
spectrumsynth_outputs
static const AVFilterPad spectrumsynth_outputs[]
Definition: vaf_spectrumsynth.c:534
SpectrumSynthContext::xend
int xend
Definition: vaf_spectrumsynth.c:64
VERTICAL
@ VERTICAL
Definition: vaf_spectrumsynth.c:41
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:111
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
SpectrumSynthContext::phase
AVFrame * phase
Definition: vaf_spectrumsynth.c:53
SpectrumSynthContext::xpos
int xpos
Definition: vaf_spectrumsynth.c:63
f
f
Definition: af_crystalizer.c:122
ff_inlink_set_status
void ff_inlink_set_status(AVFilterLink *link, int status)
Set the status on an input link.
Definition: avfilter.c:1589
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
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
cpu.h
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
spectrumsynth_inputs
static const AVFilterPad spectrumsynth_inputs[]
Definition: vaf_spectrumsynth.c:523
read_fft_data
static void read_fft_data(AVFilterContext *ctx, int x, int h, int ch)
Definition: vaf_spectrumsynth.c:282
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
SpectrumSynthContext::factor
float factor
Definition: vaf_spectrumsynth.c:66
SpectrumSynthContext::hop_size
int hop_size
Definition: vaf_spectrumsynth.c:61
SpectrumSynthContext::orientation
int orientation
Definition: vaf_spectrumsynth.c:51
NB_ORIENTATIONS
@ NB_ORIENTATIONS
Definition: vaf_spectrumsynth.c:41
read16_fft_bin
static void read16_fft_bin(SpectrumSynthContext *s, int x, int y, int f, int ch)
Definition: vaf_spectrumsynth.c:232
SpectrumSynthContext::win_func
int win_func
Definition: vaf_spectrumsynth.c:49
M_PI
#define M_PI
Definition: mathematics.h:67
av_tx_uninit
av_cold void av_tx_uninit(AVTXContext **ctx)
Frees a context and sets *ctx to NULL, does nothing when *ctx == NULL.
Definition: tx.c:295
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Underlying C type is float.
Definition: opt.h:271
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
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
HORIZONTAL
@ HORIZONTAL
Definition: vaf_spectrumsynth.c:41
MAGNITUDE
@ MAGNITUDE
Definition: vaf_spectrumsynth.c:97
SpectrumSynthContext::channels
int channels
Definition: vaf_spectrumsynth.c:46
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
SpectrumSynthContext::nb_freq
int nb_freq
Definition: vaf_spectrumsynth.c:60
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
SpectrumSynthContext::overlap
float overlap
Definition: vaf_spectrumsynth.c:50
PHASE
@ PHASE
Definition: vaf_spectrumsynth.c:98
AVFilterPad::name
const char * name
Pad name.
Definition: filters.h:44
SpectrumSynthContext::tx_fn
av_tx_fn tx_fn
Definition: vaf_spectrumsynth.c:55
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:264
av_cmp_q
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
AVFilter
Filter definition.
Definition: avfilter.h:201
ret
ret
Definition: filter_design.txt:187
SpectrumSynthContext::fft_in
AVComplexFloat ** fft_in
bins holder for each (displayed) channels
Definition: vaf_spectrumsynth.c:56
FF_COUNT2LAYOUT
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
window_func.h
FULLFRAME
@ FULLFRAME
Definition: vaf_spectrumsynth.c:40
spectrumsynth_options
static const AVOption spectrumsynth_options[]
Definition: vaf_spectrumsynth.c:75
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
read8_fft_bin
static void read8_fft_bin(SpectrumSynthContext *s, int x, int y, int f, int ch)
Definition: vaf_spectrumsynth.c:257
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
ffmath.h
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:78
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
factor
static const int factor[16]
Definition: vf_pp7.c:80
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mem.h
audio.h
V
#define V
Definition: vaf_spectrumsynth.c:73
scale
static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition: intra.c:291
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
activate
static int activate(AVFilterContext *ctx)
Definition: vaf_spectrumsynth.c:460
channel_layouts
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:112
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
LOG
@ LOG
Definition: vaf_spectrumsynth.c:39
SpectrumSynthContext::win_size
int win_size
Definition: vaf_spectrumsynth.c:58
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h
h
Definition: vp9dsp_template.c:2070
ff_outlink_frame_wanted
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true
SpectrumSynthContext::fft_out
AVComplexFloat ** fft_out
bins holder for each (displayed) channels
Definition: vaf_spectrumsynth.c:57
width
#define width
Definition: dsp.h:85
LINEAR
@ LINEAR
Definition: vaf_spectrumsynth.c:39
REPLACE
@ REPLACE
Definition: vaf_spectrumsynth.c:40
RSCROLL
@ RSCROLL
Definition: vaf_spectrumsynth.c:40
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vaf_spectrumsynth.c:499
NB_SCALES
@ NB_SCALES
Definition: vaf_spectrumsynth.c:39
SpectrumSynthContext::pts
int64_t pts
Definition: vaf_spectrumsynth.c:65
SlideMode
SlideMode
Definition: avf_ahistogram.c:31
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:238
tx.h