FFmpeg
af_afir.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2017 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  * An arbitrary audio FIR filter
24  */
25 
26 #include <float.h>
27 
28 #include "libavutil/tx.h"
29 #include "libavutil/avstring.h"
31 #include "libavutil/common.h"
32 #include "libavutil/float_dsp.h"
33 #include "libavutil/frame.h"
34 #include "libavutil/intreadwrite.h"
35 #include "libavutil/log.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/rational.h"
39 
40 #include "audio.h"
41 #include "avfilter.h"
42 #include "filters.h"
43 #include "formats.h"
44 #include "internal.h"
45 #include "af_afir.h"
46 #include "af_afirdsp.h"
47 
48 static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color)
49 {
50  const uint8_t *font;
51  int font_height;
52  int i;
53 
54  font = avpriv_cga_font, font_height = 8;
55 
56  for (i = 0; txt[i]; i++) {
57  int char_y, mask;
58 
59  uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
60  for (char_y = 0; char_y < font_height; char_y++) {
61  for (mask = 0x80; mask; mask >>= 1) {
62  if (font[txt[i] * font_height + char_y] & mask)
63  AV_WL32(p, color);
64  p += 4;
65  }
66  p += pic->linesize[0] - 8 * 4;
67  }
68  }
69 }
70 
71 static void draw_line(AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color)
72 {
73  int dx = FFABS(x1-x0);
74  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
75  int err = (dx>dy ? dx : -dy) / 2, e2;
76 
77  for (;;) {
78  AV_WL32(out->data[0] + y0 * out->linesize[0] + x0 * 4, color);
79 
80  if (x0 == x1 && y0 == y1)
81  break;
82 
83  e2 = err;
84 
85  if (e2 >-dx) {
86  err -= dy;
87  x0--;
88  }
89 
90  if (e2 < dy) {
91  err += dx;
92  y0 += sy;
93  }
94  }
95 }
96 
97 #define DEPTH 32
98 #include "afir_template.c"
99 
100 #undef DEPTH
101 #define DEPTH 64
102 #include "afir_template.c"
103 
104 static int fir_channel(AVFilterContext *ctx, AVFrame *out, int ch)
105 {
106  AudioFIRContext *s = ctx->priv;
107 
108  for (int offset = 0; offset < out->nb_samples; offset += s->min_part_size) {
109  switch (s->format) {
110  case AV_SAMPLE_FMT_FLTP:
111  fir_quantum_float(ctx, out, ch, offset);
112  break;
113  case AV_SAMPLE_FMT_DBLP:
114  fir_quantum_double(ctx, out, ch, offset);
115  break;
116  }
117  }
118 
119  return 0;
120 }
121 
122 static int fir_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
123 {
124  AVFrame *out = arg;
125  const int start = (out->ch_layout.nb_channels * jobnr) / nb_jobs;
126  const int end = (out->ch_layout.nb_channels * (jobnr+1)) / nb_jobs;
127 
128  for (int ch = start; ch < end; ch++) {
129  fir_channel(ctx, out, ch);
130  }
131 
132  return 0;
133 }
134 
135 static int fir_frame(AudioFIRContext *s, AVFrame *in, AVFilterLink *outlink)
136 {
137  AVFilterContext *ctx = outlink->src;
138  AVFrame *out = NULL;
139 
140  out = ff_get_audio_buffer(outlink, in->nb_samples);
141  if (!out) {
142  av_frame_free(&in);
143  return AVERROR(ENOMEM);
144  }
145  out->pts = in->pts;
146 
147  s->in = in;
150 
151  av_frame_free(&in);
152  s->in = NULL;
153 
154  return ff_filter_frame(outlink, out);
155 }
156 
158  int offset, int nb_partitions, int part_size)
159 {
160  AudioFIRContext *s = ctx->priv;
161 
162  seg->tx = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->tx));
163  seg->itx = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->itx));
164  if (!seg->tx || !seg->itx)
165  return AVERROR(ENOMEM);
166 
167  seg->fft_length = part_size * 2 + 1;
168  seg->part_size = part_size;
169  seg->block_size = FFALIGN(seg->fft_length, 32);
170  seg->coeff_size = FFALIGN(seg->part_size + 1, 32);
171  seg->nb_partitions = nb_partitions;
172  seg->input_size = offset + s->min_part_size;
173  seg->input_offset = offset;
174 
175  seg->part_index = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->part_index));
176  seg->output_offset = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->output_offset));
177  if (!seg->part_index || !seg->output_offset)
178  return AVERROR(ENOMEM);
179 
180  for (int ch = 0; ch < ctx->inputs[0]->ch_layout.nb_channels && part_size >= 8; ch++) {
181  double dscale = 1.0, idscale = 1.0 / part_size;
182  float fscale = 1.f, ifscale = 1.f / part_size;
183 
184  switch (s->format) {
185  case AV_SAMPLE_FMT_FLTP:
186  av_tx_init(&seg->tx[ch], &seg->tx_fn, AV_TX_FLOAT_RDFT, 0, 2 * part_size, &fscale, 0);
187  av_tx_init(&seg->itx[ch], &seg->itx_fn, AV_TX_FLOAT_RDFT, 1, 2 * part_size, &ifscale, 0);
188  break;
189  case AV_SAMPLE_FMT_DBLP:
190  av_tx_init(&seg->tx[ch], &seg->tx_fn, AV_TX_DOUBLE_RDFT, 0, 2 * part_size, &dscale, 0);
191  av_tx_init(&seg->itx[ch], &seg->itx_fn, AV_TX_DOUBLE_RDFT, 1, 2 * part_size, &idscale, 0);
192  break;
193  }
194 
195  if (!seg->tx[ch] || !seg->itx[ch])
196  return AVERROR(ENOMEM);
197  }
198 
199  seg->sumin = ff_get_audio_buffer(ctx->inputs[0], seg->fft_length);
200  seg->sumout = ff_get_audio_buffer(ctx->inputs[0], seg->fft_length);
201  seg->blockin = ff_get_audio_buffer(ctx->inputs[0], seg->nb_partitions * seg->block_size);
202  seg->blockout = ff_get_audio_buffer(ctx->inputs[0], seg->nb_partitions * seg->block_size);
203  seg->buffer = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
204  seg->coeff = ff_get_audio_buffer(ctx->inputs[1 + s->selir], seg->nb_partitions * seg->coeff_size * 2);
205  seg->input = ff_get_audio_buffer(ctx->inputs[0], seg->input_size);
206  seg->output = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
207  if (!seg->buffer || !seg->sumin || !seg->sumout || !seg->blockin || !seg->blockout || !seg->coeff || !seg->input || !seg->output)
208  return AVERROR(ENOMEM);
209 
210  return 0;
211 }
212 
214 {
215  AudioFIRContext *s = ctx->priv;
216 
217  if (seg->tx) {
218  for (int ch = 0; ch < s->nb_channels; ch++) {
219  av_tx_uninit(&seg->tx[ch]);
220  }
221  }
222  av_freep(&seg->tx);
223 
224  if (seg->itx) {
225  for (int ch = 0; ch < s->nb_channels; ch++) {
226  av_tx_uninit(&seg->itx[ch]);
227  }
228  }
229  av_freep(&seg->itx);
230 
231  av_freep(&seg->output_offset);
232  av_freep(&seg->part_index);
233 
234  av_frame_free(&seg->blockin);
235  av_frame_free(&seg->blockout);
236  av_frame_free(&seg->sumin);
237  av_frame_free(&seg->sumout);
238  av_frame_free(&seg->buffer);
239  av_frame_free(&seg->coeff);
240  av_frame_free(&seg->input);
241  av_frame_free(&seg->output);
242  seg->input_size = 0;
243 }
244 
246 {
247  AudioFIRContext *s = ctx->priv;
248  int ret, i, cur_nb_taps;
249 
250  if (!s->nb_taps) {
251  int part_size, max_part_size;
252  int left, offset = 0;
253 
254  s->nb_taps = ff_inlink_queued_samples(ctx->inputs[1 + s->selir]);
255  if (s->nb_taps <= 0)
256  return AVERROR(EINVAL);
257 
258  if (s->minp > s->maxp) {
259  s->maxp = s->minp;
260  }
261 
262  left = s->nb_taps;
263  part_size = 1 << av_log2(s->minp);
264  max_part_size = 1 << av_log2(s->maxp);
265 
266  s->min_part_size = part_size;
267 
268  for (i = 0; left > 0; i++) {
269  int step = part_size == max_part_size ? INT_MAX : 1 + (i == 0);
270  int nb_partitions = FFMIN(step, (left + part_size - 1) / part_size);
271 
272  s->nb_segments = i + 1;
273  ret = init_segment(ctx, &s->seg[i], offset, nb_partitions, part_size);
274  if (ret < 0)
275  return ret;
276  offset += nb_partitions * part_size;
277  left -= nb_partitions * part_size;
278  part_size *= 2;
279  part_size = FFMIN(part_size, max_part_size);
280  }
281  }
282 
283  if (!s->ir[s->selir]) {
284  ret = ff_inlink_consume_samples(ctx->inputs[1 + s->selir], s->nb_taps, s->nb_taps, &s->ir[s->selir]);
285  if (ret < 0)
286  return ret;
287  if (ret == 0)
288  return AVERROR_BUG;
289  }
290 
291  if (s->response) {
292  switch (s->format) {
293  case AV_SAMPLE_FMT_FLTP:
294  draw_response_float(ctx, s->video);
295  break;
296  case AV_SAMPLE_FMT_DBLP:
297  draw_response_double(ctx, s->video);
298  break;
299  }
300  }
301 
302  s->gain = 1;
303  cur_nb_taps = s->ir[s->selir]->nb_samples;
304 
305  switch (s->format) {
306  case AV_SAMPLE_FMT_FLTP:
307  ret = get_power_float(ctx, s, cur_nb_taps);
308  break;
309  case AV_SAMPLE_FMT_DBLP:
310  ret = get_power_double(ctx, s, cur_nb_taps);
311  break;
312  }
313 
314  if (ret < 0)
315  return ret;
316 
317  av_log(ctx, AV_LOG_DEBUG, "nb_taps: %d\n", cur_nb_taps);
318  av_log(ctx, AV_LOG_DEBUG, "nb_segments: %d\n", s->nb_segments);
319 
320  switch (s->format) {
321  case AV_SAMPLE_FMT_FLTP:
322  convert_channels_float(ctx, s);
323  break;
324  case AV_SAMPLE_FMT_DBLP:
325  convert_channels_double(ctx, s);
326  break;
327  }
328 
329  s->have_coeffs = 1;
330 
331  return 0;
332 }
333 
335 {
336  AVFilterContext *ctx = link->dst;
337  AudioFIRContext *s = ctx->priv;
338  int nb_taps, max_nb_taps;
339 
340  nb_taps = ff_inlink_queued_samples(link);
341  max_nb_taps = s->max_ir_len * ctx->outputs[0]->sample_rate;
342  if (nb_taps > max_nb_taps) {
343  av_log(ctx, AV_LOG_ERROR, "Too big number of coefficients: %d > %d.\n", nb_taps, max_nb_taps);
344  return AVERROR(EINVAL);
345  }
346 
347  return 0;
348 }
349 
351 {
352  AudioFIRContext *s = ctx->priv;
353  AVFilterLink *outlink = ctx->outputs[0];
354  int ret, status, available, wanted;
355  AVFrame *in = NULL;
356  int64_t pts;
357 
359  if (s->response)
361  if (!s->eof_coeffs[s->selir]) {
362  ret = check_ir(ctx->inputs[1 + s->selir]);
363  if (ret < 0)
364  return ret;
365 
366  if (ff_outlink_get_status(ctx->inputs[1 + s->selir]) == AVERROR_EOF)
367  s->eof_coeffs[s->selir] = 1;
368 
369  if (!s->eof_coeffs[s->selir]) {
370  if (ff_outlink_frame_wanted(ctx->outputs[0]))
371  ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
372  else if (s->response && ff_outlink_frame_wanted(ctx->outputs[1]))
373  ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
374  return 0;
375  }
376  }
377 
378  if (!s->have_coeffs && s->eof_coeffs[s->selir]) {
380  if (ret < 0)
381  return ret;
382  }
383 
384  available = ff_inlink_queued_samples(ctx->inputs[0]);
385  wanted = FFMAX(s->min_part_size, (available / s->min_part_size) * s->min_part_size);
386  ret = ff_inlink_consume_samples(ctx->inputs[0], wanted, wanted, &in);
387  if (ret > 0)
388  ret = fir_frame(s, in, outlink);
389 
390  if (ret < 0)
391  return ret;
392 
393  if (s->response && s->have_coeffs) {
394  int64_t old_pts = s->video->pts;
395  int64_t new_pts = av_rescale_q(s->pts, ctx->inputs[0]->time_base, ctx->outputs[1]->time_base);
396 
397  if (ff_outlink_frame_wanted(ctx->outputs[1]) && old_pts < new_pts) {
398  AVFrame *clone;
399  s->video->pts = new_pts;
400  clone = av_frame_clone(s->video);
401  if (!clone)
402  return AVERROR(ENOMEM);
403  return ff_filter_frame(ctx->outputs[1], clone);
404  }
405  }
406 
407  if (ff_inlink_queued_samples(ctx->inputs[0]) >= s->min_part_size) {
409  return 0;
410  }
411 
412  if (ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
413  if (status == AVERROR_EOF) {
414  ff_outlink_set_status(ctx->outputs[0], status, pts);
415  if (s->response)
416  ff_outlink_set_status(ctx->outputs[1], status, pts);
417  return 0;
418  }
419  }
420 
421  if (ff_outlink_frame_wanted(ctx->outputs[0]) &&
422  !ff_outlink_get_status(ctx->inputs[0])) {
423  ff_inlink_request_frame(ctx->inputs[0]);
424  return 0;
425  }
426 
427  if (s->response &&
428  ff_outlink_frame_wanted(ctx->outputs[1]) &&
429  !ff_outlink_get_status(ctx->inputs[0])) {
430  ff_inlink_request_frame(ctx->inputs[0]);
431  return 0;
432  }
433 
434  return FFERROR_NOT_READY;
435 }
436 
438 {
439  AudioFIRContext *s = ctx->priv;
440  static const enum AVSampleFormat sample_fmts[3][3] = {
444  };
445  static const enum AVPixelFormat pix_fmts[] = {
448  };
449  int ret;
450 
451  if (s->response) {
452  AVFilterLink *videolink = ctx->outputs[1];
454  if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0)
455  return ret;
456  }
457 
458  if (s->ir_format) {
460  if (ret < 0)
461  return ret;
462  } else {
465 
466  if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[0]->outcfg.channel_layouts)) < 0)
467  return ret;
468  if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
469  return ret;
470 
472  if (ret)
473  return ret;
474  for (int i = 1; i < ctx->nb_inputs; i++) {
475  if ((ret = ff_channel_layouts_ref(mono, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
476  return ret;
477  }
478  }
479 
480  if ((ret = ff_set_common_formats_from_list(ctx, sample_fmts[s->precision])) < 0)
481  return ret;
482 
484 }
485 
486 static int config_output(AVFilterLink *outlink)
487 {
488  AVFilterContext *ctx = outlink->src;
489  AudioFIRContext *s = ctx->priv;
490  int ret;
491 
492  s->one2many = ctx->inputs[1 + s->selir]->ch_layout.nb_channels == 1;
493  outlink->sample_rate = ctx->inputs[0]->sample_rate;
494  outlink->time_base = ctx->inputs[0]->time_base;
495 #if FF_API_OLD_CHANNEL_LAYOUT
497  outlink->channel_layout = ctx->inputs[0]->channel_layout;
499 #endif
500  if ((ret = av_channel_layout_copy(&outlink->ch_layout, &ctx->inputs[0]->ch_layout)) < 0)
501  return ret;
502  outlink->ch_layout.nb_channels = ctx->inputs[0]->ch_layout.nb_channels;
503 
504  s->nb_channels = outlink->ch_layout.nb_channels;
505  s->nb_coef_channels = ctx->inputs[1 + s->selir]->ch_layout.nb_channels;
506  s->format = outlink->format;
507 
508  return 0;
509 }
510 
512 {
513  AudioFIRContext *s = ctx->priv;
514 
515  for (int i = 0; i < s->nb_segments; i++) {
516  uninit_segment(ctx, &s->seg[i]);
517  }
518 
519  av_freep(&s->fdsp);
520 
521  for (int i = 0; i < s->nb_irs; i++) {
522  av_frame_free(&s->ir[i]);
523  }
524 
525  av_frame_free(&s->video);
526 }
527 
528 static int config_video(AVFilterLink *outlink)
529 {
530  AVFilterContext *ctx = outlink->src;
531  AudioFIRContext *s = ctx->priv;
532 
533  outlink->sample_aspect_ratio = (AVRational){1,1};
534  outlink->w = s->w;
535  outlink->h = s->h;
536  outlink->frame_rate = s->frame_rate;
537  outlink->time_base = av_inv_q(outlink->frame_rate);
538 
539  av_frame_free(&s->video);
540  s->video = ff_get_video_buffer(outlink, outlink->w, outlink->h);
541  if (!s->video)
542  return AVERROR(ENOMEM);
543 
544  return 0;
545 }
546 
548 {
549  AudioFIRContext *s = ctx->priv;
550  AVFilterPad pad, vpad;
551  int ret;
552 
553  pad = (AVFilterPad) {
554  .name = "main",
555  .type = AVMEDIA_TYPE_AUDIO,
556  };
557 
558  ret = ff_append_inpad(ctx, &pad);
559  if (ret < 0)
560  return ret;
561 
562  for (int n = 0; n < s->nb_irs; n++) {
563  pad = (AVFilterPad) {
564  .name = av_asprintf("ir%d", n),
565  .type = AVMEDIA_TYPE_AUDIO,
566  };
567 
568  if (!pad.name)
569  return AVERROR(ENOMEM);
570 
572  if (ret < 0)
573  return ret;
574  }
575 
576  pad = (AVFilterPad) {
577  .name = "default",
578  .type = AVMEDIA_TYPE_AUDIO,
579  .config_props = config_output,
580  };
581 
582  ret = ff_append_outpad(ctx, &pad);
583  if (ret < 0)
584  return ret;
585 
586  if (s->response) {
587  vpad = (AVFilterPad){
588  .name = "filter_response",
589  .type = AVMEDIA_TYPE_VIDEO,
590  .config_props = config_video,
591  };
592 
593  ret = ff_append_outpad(ctx, &vpad);
594  if (ret < 0)
595  return ret;
596  }
597 
598  s->fdsp = avpriv_float_dsp_alloc(0);
599  if (!s->fdsp)
600  return AVERROR(ENOMEM);
601 
602  ff_afir_init(&s->afirdsp);
603 
604  return 0;
605 }
606 
608  const char *cmd,
609  const char *arg,
610  char *res,
611  int res_len,
612  int flags)
613 {
614  AudioFIRContext *s = ctx->priv;
615  int prev_ir = s->selir;
616  int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
617 
618  if (ret < 0)
619  return ret;
620 
621  s->selir = FFMIN(s->nb_irs - 1, s->selir);
622 
623  if (prev_ir != s->selir) {
624  s->have_coeffs = 0;
625  }
626 
627  return 0;
628 }
629 
630 #define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
631 #define AFR AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
632 #define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
633 #define OFFSET(x) offsetof(AudioFIRContext, x)
634 
635 static const AVOption afir_options[] = {
636  { "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
637  { "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
638  { "length", "set IR length", OFFSET(length), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
639  { "gtype", "set IR auto gain type",OFFSET(gtype), AV_OPT_TYPE_INT, {.i64=0}, -1, 2, AF, "gtype" },
640  { "none", "without auto gain", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "gtype" },
641  { "peak", "peak gain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "gtype" },
642  { "dc", "DC gain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "gtype" },
643  { "gn", "gain to noise", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "gtype" },
644  { "irgain", "set IR gain", OFFSET(ir_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
645  { "irfmt", "set IR format", OFFSET(ir_format), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "irfmt" },
646  { "mono", "single channel", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "irfmt" },
647  { "input", "same as input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "irfmt" },
648  { "maxir", "set max IR length", OFFSET(max_ir_len), AV_OPT_TYPE_FLOAT, {.dbl=30}, 0.1, 60, AF },
649  { "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
650  { "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
651  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF },
652  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT32_MAX, VF },
653  { "minp", "set min partition size", OFFSET(minp), AV_OPT_TYPE_INT, {.i64=8192}, 1, 32768, AF },
654  { "maxp", "set max partition size", OFFSET(maxp), AV_OPT_TYPE_INT, {.i64=8192}, 8, 32768, AF },
655  { "nbirs", "set number of input IRs",OFFSET(nb_irs),AV_OPT_TYPE_INT, {.i64=1}, 1, 32, AF },
656  { "ir", "select IR", OFFSET(selir), AV_OPT_TYPE_INT, {.i64=0}, 0, 31, AFR },
657  { "precision", "set processing precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, AF, "precision" },
658  { "auto", "set auto processing precision", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" },
659  { "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" },
660  { "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" },
661  { NULL }
662 };
663 
665 
667  .name = "afir",
668  .description = NULL_IF_CONFIG_SMALL("Apply Finite Impulse Response filter with supplied coefficients in additional stream(s)."),
669  .priv_size = sizeof(AudioFIRContext),
670  .priv_class = &afir_class,
672  .init = init,
673  .activate = activate,
674  .uninit = uninit,
675  .process_command = process_command,
679 };
formats
formats
Definition: signature.h:48
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:101
activate
static int activate(AVFilterContext *ctx)
Definition: af_afir.c:350
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:100
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
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
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
status
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
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:380
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
AudioFIRSegment::block_size
int block_size
Definition: af_afir.h:34
out
FILE * out
Definition: movenc.c:54
color
Definition: vf_paletteuse.c:600
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:999
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:591
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:330
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
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
VF
#define VF
Definition: af_afir.c:632
rational.h
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:116
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:116
ff_all_channel_counts
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition.
Definition: formats.c:566
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
AudioFIRSegment::buffer
AVFrame * buffer
Definition: af_afir.h:47
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:167
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
AudioFIRSegment::input_offset
int input_offset
Definition: af_afir.h:38
ff_set_common_all_samplerates
int ff_set_common_all_samplerates(AVFilterContext *ctx)
Equivalent to ff_set_common_samplerates(ctx, ff_all_samplerates())
Definition: formats.c:739
AudioFIRSegment::tx_fn
av_tx_fn tx_fn
Definition: af_afir.h:53
float.h
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
AudioFIRSegment::blockin
AVFrame * blockin
Definition: af_afir.h:45
AudioFIRSegment::part_size
int part_size
Definition: af_afir.h:33
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
AudioFIRSegment::input_size
int input_size
Definition: af_afir.h:37
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:649
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
av_channel_layout_copy
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
Definition: channel_layout.c:637
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
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:212
ff_append_inpad
int ff_append_inpad(AVFilterContext *f, AVFilterPad *p)
Append a new input/output pad to the filter's list of such pads.
Definition: avfilter.c:118
AudioFIRSegment::coeff
AVFrame * coeff
Definition: af_afir.h:48
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_afir.c:511
af_afirdsp.h
fir_channels
static int fir_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: af_afir.c:122
afir_options
static const AVOption afir_options[]
Definition: af_afir.c:635
ff_afir_init
static av_unused void ff_afir_init(AudioFIRDSPContext *dsp)
Definition: af_afirdsp.h:72
pts
static int64_t pts
Definition: transcode_aac.c:654
AudioFIRSegment::blockout
AVFrame * blockout
Definition: af_afir.h:46
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:116
uninit_segment
static void uninit_segment(AVFilterContext *ctx, AudioFIRSegment *seg)
Definition: af_afir.c:213
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
AudioFIRSegment
Definition: af_afir.h:31
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
AudioFIRSegment::tx
AVTXContext ** tx
Definition: af_afir.h:52
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(afir)
mask
static const uint16_t mask[17]
Definition: lzw.c:38
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:189
ff_inlink_request_frame
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1511
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
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:596
ff_set_common_formats_from_list
int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts)
Equivalent to ff_set_common_formats(ctx, ff_make_format_list(fmts))
Definition: formats.c:755
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:296
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:48
afir_template.c
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:474
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
link
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 link
Definition: filter_design.txt:23
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:64
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:1413
NULL
#define NULL
Definition: coverity.c:32
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:123
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
draw_line
static void draw_line(AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color)
Definition: af_afir.c:71
AudioFIRSegment::itx_fn
av_tx_fn itx_fn
Definition: af_afir.h:53
convert_coeffs
static int convert_coeffs(AVFilterContext *ctx)
Definition: af_afir.c:245
ff_set_common_all_channel_counts
int ff_set_common_all_channel_counts(AVFilterContext *ctx)
Equivalent to ff_set_common_channel_layouts(ctx, ff_all_channel_counts())
Definition: formats.c:721
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:466
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:1348
AFR
#define AFR
Definition: af_afir.c:631
float_dsp.h
AudioFIRSegment::output
AVFrame * output
Definition: af_afir.h:50
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h: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:117
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
AF
#define AF
Definition: af_afir.c:630
check_ir
static int check_ir(AVFilterLink *link)
Definition: af_afir.c:334
AudioFIRSegment::sumin
AVFrame * sumin
Definition: af_afir.h:43
frame.h
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:863
af_afir.h
offset
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 offset
Definition: writing_filters.txt:86
AV_PIX_FMT_RGB0
@ AV_PIX_FMT_RGB0
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:228
xga_font_data.h
ff_af_afir
const AVFilter ff_af_afir
Definition: af_afir.c:666
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:251
internal.h
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_afir.c:437
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:405
OFFSET
#define OFFSET(x)
Definition: af_afir.c:633
config_video
static int config_video(AVFilterLink *outlink)
Definition: af_afir.c:528
log.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AudioFIRSegment::input
AVFrame * input
Definition: af_afir.h:49
AudioFIRSegment::coeff_size
int coeff_size
Definition: af_afir.h:36
available
if no frame is available
Definition: filter_design.txt:166
common.h
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:783
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
AudioFIRSegment::nb_partitions
int nb_partitions
Definition: af_afir.h:32
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_TX_DOUBLE_RDFT
@ AV_TX_DOUBLE_RDFT
Definition: tx.h:89
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:55
ff_inlink_queued_samples
int ff_inlink_queued_samples(AVFilterLink *link)
Definition: avfilter.c:1373
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
AVFilter
Filter definition.
Definition: avfilter.h:171
ret
ret
Definition: filter_design.txt:187
AudioFIRSegment::itx
AVTXContext ** itx
Definition: af_afir.h:52
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AV_TX_FLOAT_RDFT
@ AV_TX_FLOAT_RDFT
Real to complex and complex to real DFTs.
Definition: tx.h:88
AudioFIRSegment::fft_length
int fft_length
Definition: af_afir.h:35
channel_layout.h
AudioFIRSegment::sumout
AVFrame * sumout
Definition: af_afir.h:44
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_afir.c:486
AudioFIRContext
Definition: af_afir.h: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
fir_channel
static int fir_channel(AVFilterContext *ctx, AVFrame *out, int ch)
Definition: af_afir.c:104
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:67
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1534
AVFilterContext
An instance of a filter.
Definition: avfilter.h:408
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:82
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:127
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
audio.h
fir_frame
static int fir_frame(AudioFIRContext *s, AVFrame *in, AVFilterLink *outlink)
Definition: af_afir.c:135
AVFilterFormatsConfig::formats
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:512
ff_append_outpad
int ff_append_outpad(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:129
avpriv_cga_font
const uint8_t avpriv_cga_font[2048]
Definition: xga_font_data.c:29
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_afir.c:547
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
avpriv_float_dsp_alloc
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
init_segment
static int init_segment(AVFilterContext *ctx, AudioFIRSegment *seg, int offset, int nb_partitions, int part_size)
Definition: af_afir.c:157
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: af_afir.c:607
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
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
avstring.h
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:142
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
AudioFIRSegment::output_offset
int * output_offset
Definition: af_afir.h:40
drawtext
static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color)
Definition: af_afir.c:48
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:191
tx.h
AudioFIRSegment::part_index
int * part_index
Definition: af_afir.h:41