FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/af_afir.c
Date: 2022-11-26 13:19:19
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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"
30 #include "libavutil/channel_layout.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"
38 #include "libavutil/xga_font_data.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;
148 ff_filter_execute(ctx, fir_channels, out, NULL,
149 FFMIN(outlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
150
151 av_frame_free(&in);
152 s->in = NULL;
153
154 return ff_filter_frame(outlink, out);
155 }
156
157 static int init_segment(AVFilterContext *ctx, AudioFIRSegment *seg,
158 int offset, int nb_partitions, int part_size)
159 {
160 AudioFIRContext *s = ctx->priv;
161 int ret;
162
163 seg->tx = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->tx));
164 seg->itx = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->itx));
165 if (!seg->tx || !seg->itx)
166 return AVERROR(ENOMEM);
167
168 seg->fft_length = part_size * 2 + 1;
169 seg->part_size = part_size;
170 seg->block_size = FFALIGN(seg->fft_length, 32);
171 seg->coeff_size = FFALIGN(seg->part_size + 1, 32);
172 seg->nb_partitions = nb_partitions;
173 seg->input_size = offset + s->min_part_size;
174 seg->input_offset = offset;
175
176 seg->part_index = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->part_index));
177 seg->output_offset = av_calloc(ctx->inputs[0]->ch_layout.nb_channels, sizeof(*seg->output_offset));
178 if (!seg->part_index || !seg->output_offset)
179 return AVERROR(ENOMEM);
180
181 for (int ch = 0; ch < ctx->inputs[0]->ch_layout.nb_channels && part_size >= 8; ch++) {
182 union { double d; float f; } scale, iscale;
183 enum AVTXType tx_type;
184
185 switch (s->format) {
186 case AV_SAMPLE_FMT_FLTP:
187 scale.f = 1.f;
188 iscale.f = 1.f / part_size;
189 tx_type = AV_TX_FLOAT_RDFT;
190 break;
191 case AV_SAMPLE_FMT_DBLP:
192 scale.d = 1.0;
193 iscale.d = 1.0 / part_size;
194 tx_type = AV_TX_DOUBLE_RDFT;
195 break;
196 }
197 ret = av_tx_init(&seg->tx[ch], &seg->tx_fn, tx_type,
198 0, 2 * part_size, &scale, 0);
199 if (ret < 0)
200 return ret;
201 ret = av_tx_init(&seg->itx[ch], &seg->itx_fn, tx_type,
202 1, 2 * part_size, &iscale, 0);
203 if (ret < 0)
204 return ret;
205 }
206
207 seg->sumin = ff_get_audio_buffer(ctx->inputs[0], seg->fft_length);
208 seg->sumout = ff_get_audio_buffer(ctx->inputs[0], seg->fft_length);
209 seg->blockin = ff_get_audio_buffer(ctx->inputs[0], seg->nb_partitions * seg->block_size);
210 seg->blockout = ff_get_audio_buffer(ctx->inputs[0], seg->nb_partitions * seg->block_size);
211 seg->buffer = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
212 seg->coeff = ff_get_audio_buffer(ctx->inputs[1 + s->selir], seg->nb_partitions * seg->coeff_size * 2);
213 seg->input = ff_get_audio_buffer(ctx->inputs[0], seg->input_size);
214 seg->output = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
215 if (!seg->buffer || !seg->sumin || !seg->sumout || !seg->blockin || !seg->blockout || !seg->coeff || !seg->input || !seg->output)
216 return AVERROR(ENOMEM);
217
218 return 0;
219 }
220
221 static void uninit_segment(AVFilterContext *ctx, AudioFIRSegment *seg)
222 {
223 AudioFIRContext *s = ctx->priv;
224
225 if (seg->tx) {
226 for (int ch = 0; ch < s->nb_channels; ch++) {
227 av_tx_uninit(&seg->tx[ch]);
228 }
229 }
230 av_freep(&seg->tx);
231
232 if (seg->itx) {
233 for (int ch = 0; ch < s->nb_channels; ch++) {
234 av_tx_uninit(&seg->itx[ch]);
235 }
236 }
237 av_freep(&seg->itx);
238
239 av_freep(&seg->output_offset);
240 av_freep(&seg->part_index);
241
242 av_frame_free(&seg->blockin);
243 av_frame_free(&seg->blockout);
244 av_frame_free(&seg->sumin);
245 av_frame_free(&seg->sumout);
246 av_frame_free(&seg->buffer);
247 av_frame_free(&seg->coeff);
248 av_frame_free(&seg->input);
249 av_frame_free(&seg->output);
250 seg->input_size = 0;
251 }
252
253 static int convert_coeffs(AVFilterContext *ctx)
254 {
255 AudioFIRContext *s = ctx->priv;
256 int ret, i, cur_nb_taps;
257
258 if (!s->nb_taps) {
259 int part_size, max_part_size;
260 int left, offset = 0;
261
262 s->nb_taps = ff_inlink_queued_samples(ctx->inputs[1 + s->selir]);
263 if (s->nb_taps <= 0)
264 return AVERROR(EINVAL);
265
266 if (s->minp > s->maxp) {
267 s->maxp = s->minp;
268 }
269
270 left = s->nb_taps;
271 part_size = 1 << av_log2(s->minp);
272 max_part_size = 1 << av_log2(s->maxp);
273
274 s->min_part_size = part_size;
275
276 for (i = 0; left > 0; i++) {
277 int step = part_size == max_part_size ? INT_MAX : 1 + (i == 0);
278 int nb_partitions = FFMIN(step, (left + part_size - 1) / part_size);
279
280 s->nb_segments = i + 1;
281 ret = init_segment(ctx, &s->seg[i], offset, nb_partitions, part_size);
282 if (ret < 0)
283 return ret;
284 offset += nb_partitions * part_size;
285 left -= nb_partitions * part_size;
286 part_size *= 2;
287 part_size = FFMIN(part_size, max_part_size);
288 }
289 }
290
291 if (!s->ir[s->selir]) {
292 ret = ff_inlink_consume_samples(ctx->inputs[1 + s->selir], s->nb_taps, s->nb_taps, &s->ir[s->selir]);
293 if (ret < 0)
294 return ret;
295 if (ret == 0)
296 return AVERROR_BUG;
297 }
298
299 if (s->response) {
300 switch (s->format) {
301 case AV_SAMPLE_FMT_FLTP:
302 draw_response_float(ctx, s->video);
303 break;
304 case AV_SAMPLE_FMT_DBLP:
305 draw_response_double(ctx, s->video);
306 break;
307 }
308 }
309
310 s->gain = 1;
311 cur_nb_taps = s->ir[s->selir]->nb_samples;
312
313 switch (s->format) {
314 case AV_SAMPLE_FMT_FLTP:
315 ret = get_power_float(ctx, s, cur_nb_taps);
316 break;
317 case AV_SAMPLE_FMT_DBLP:
318 ret = get_power_double(ctx, s, cur_nb_taps);
319 break;
320 }
321
322 if (ret < 0)
323 return ret;
324
325 av_log(ctx, AV_LOG_DEBUG, "nb_taps: %d\n", cur_nb_taps);
326 av_log(ctx, AV_LOG_DEBUG, "nb_segments: %d\n", s->nb_segments);
327
328 switch (s->format) {
329 case AV_SAMPLE_FMT_FLTP:
330 convert_channels_float(ctx, s);
331 break;
332 case AV_SAMPLE_FMT_DBLP:
333 convert_channels_double(ctx, s);
334 break;
335 }
336
337 s->have_coeffs = 1;
338
339 return 0;
340 }
341
342 static int check_ir(AVFilterLink *link)
343 {
344 AVFilterContext *ctx = link->dst;
345 AudioFIRContext *s = ctx->priv;
346 int nb_taps, max_nb_taps;
347
348 nb_taps = ff_inlink_queued_samples(link);
349 max_nb_taps = s->max_ir_len * ctx->outputs[0]->sample_rate;
350 if (nb_taps > max_nb_taps) {
351 av_log(ctx, AV_LOG_ERROR, "Too big number of coefficients: %d > %d.\n", nb_taps, max_nb_taps);
352 return AVERROR(EINVAL);
353 }
354
355 return 0;
356 }
357
358 static int activate(AVFilterContext *ctx)
359 {
360 AudioFIRContext *s = ctx->priv;
361 AVFilterLink *outlink = ctx->outputs[0];
362 int ret, status, available, wanted;
363 AVFrame *in = NULL;
364 int64_t pts;
365
366 FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
367 if (s->response)
368 FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[1], ctx);
369 if (!s->eof_coeffs[s->selir]) {
370 ret = check_ir(ctx->inputs[1 + s->selir]);
371 if (ret < 0)
372 return ret;
373
374 if (ff_outlink_get_status(ctx->inputs[1 + s->selir]) == AVERROR_EOF)
375 s->eof_coeffs[s->selir] = 1;
376
377 if (!s->eof_coeffs[s->selir]) {
378 if (ff_outlink_frame_wanted(ctx->outputs[0]))
379 ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
380 else if (s->response && ff_outlink_frame_wanted(ctx->outputs[1]))
381 ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
382 return 0;
383 }
384 }
385
386 if (!s->have_coeffs && s->eof_coeffs[s->selir]) {
387 ret = convert_coeffs(ctx);
388 if (ret < 0)
389 return ret;
390 }
391
392 available = ff_inlink_queued_samples(ctx->inputs[0]);
393 wanted = FFMAX(s->min_part_size, (available / s->min_part_size) * s->min_part_size);
394 ret = ff_inlink_consume_samples(ctx->inputs[0], wanted, wanted, &in);
395 if (ret > 0)
396 ret = fir_frame(s, in, outlink);
397
398 if (ret < 0)
399 return ret;
400
401 if (s->response && s->have_coeffs) {
402 int64_t old_pts = s->video->pts;
403 int64_t new_pts = av_rescale_q(s->pts, ctx->inputs[0]->time_base, ctx->outputs[1]->time_base);
404
405 if (ff_outlink_frame_wanted(ctx->outputs[1]) && old_pts < new_pts) {
406 AVFrame *clone;
407 s->video->pts = new_pts;
408 clone = av_frame_clone(s->video);
409 if (!clone)
410 return AVERROR(ENOMEM);
411 return ff_filter_frame(ctx->outputs[1], clone);
412 }
413 }
414
415 if (ff_inlink_queued_samples(ctx->inputs[0]) >= s->min_part_size) {
416 ff_filter_set_ready(ctx, 10);
417 return 0;
418 }
419
420 if (ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
421 if (status == AVERROR_EOF) {
422 ff_outlink_set_status(ctx->outputs[0], status, pts);
423 if (s->response)
424 ff_outlink_set_status(ctx->outputs[1], status, pts);
425 return 0;
426 }
427 }
428
429 if (ff_outlink_frame_wanted(ctx->outputs[0]) &&
430 !ff_outlink_get_status(ctx->inputs[0])) {
431 ff_inlink_request_frame(ctx->inputs[0]);
432 return 0;
433 }
434
435 if (s->response &&
436 ff_outlink_frame_wanted(ctx->outputs[1]) &&
437 !ff_outlink_get_status(ctx->inputs[0])) {
438 ff_inlink_request_frame(ctx->inputs[0]);
439 return 0;
440 }
441
442 return FFERROR_NOT_READY;
443 }
444
445 static int query_formats(AVFilterContext *ctx)
446 {
447 AudioFIRContext *s = ctx->priv;
448 static const enum AVSampleFormat sample_fmts[3][3] = {
449 { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE },
450 { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
451 { AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE },
452 };
453 static const enum AVPixelFormat pix_fmts[] = {
454 AV_PIX_FMT_RGB0,
455 AV_PIX_FMT_NONE
456 };
457 int ret;
458
459 if (s->response) {
460 AVFilterLink *videolink = ctx->outputs[1];
461 AVFilterFormats *formats = ff_make_format_list(pix_fmts);
462 if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0)
463 return ret;
464 }
465
466 if (s->ir_format) {
467 ret = ff_set_common_all_channel_counts(ctx);
468 if (ret < 0)
469 return ret;
470 } else {
471 AVFilterChannelLayouts *mono = NULL;
472 AVFilterChannelLayouts *layouts = ff_all_channel_counts();
473
474 if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[0]->outcfg.channel_layouts)) < 0)
475 return ret;
476 if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
477 return ret;
478
479 ret = ff_add_channel_layout(&mono, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO);
480 if (ret)
481 return ret;
482 for (int i = 1; i < ctx->nb_inputs; i++) {
483 if ((ret = ff_channel_layouts_ref(mono, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
484 return ret;
485 }
486 }
487
488 if ((ret = ff_set_common_formats_from_list(ctx, sample_fmts[s->precision])) < 0)
489 return ret;
490
491 return ff_set_common_all_samplerates(ctx);
492 }
493
494 static int config_output(AVFilterLink *outlink)
495 {
496 AVFilterContext *ctx = outlink->src;
497 AudioFIRContext *s = ctx->priv;
498 int ret;
499
500 s->one2many = ctx->inputs[1 + s->selir]->ch_layout.nb_channels == 1;
501 outlink->sample_rate = ctx->inputs[0]->sample_rate;
502 outlink->time_base = ctx->inputs[0]->time_base;
503 #if FF_API_OLD_CHANNEL_LAYOUT
504 FF_DISABLE_DEPRECATION_WARNINGS
505 outlink->channel_layout = ctx->inputs[0]->channel_layout;
506 FF_ENABLE_DEPRECATION_WARNINGS
507 #endif
508 if ((ret = av_channel_layout_copy(&outlink->ch_layout, &ctx->inputs[0]->ch_layout)) < 0)
509 return ret;
510 outlink->ch_layout.nb_channels = ctx->inputs[0]->ch_layout.nb_channels;
511
512 s->nb_channels = outlink->ch_layout.nb_channels;
513 s->nb_coef_channels = ctx->inputs[1 + s->selir]->ch_layout.nb_channels;
514 s->format = outlink->format;
515
516 return 0;
517 }
518
519 static av_cold void uninit(AVFilterContext *ctx)
520 {
521 AudioFIRContext *s = ctx->priv;
522
523 for (int i = 0; i < s->nb_segments; i++) {
524 uninit_segment(ctx, &s->seg[i]);
525 }
526
527 av_freep(&s->fdsp);
528
529 for (int i = 0; i < s->nb_irs; i++) {
530 av_frame_free(&s->ir[i]);
531 }
532
533 av_frame_free(&s->video);
534 }
535
536 static int config_video(AVFilterLink *outlink)
537 {
538 AVFilterContext *ctx = outlink->src;
539 AudioFIRContext *s = ctx->priv;
540
541 outlink->sample_aspect_ratio = (AVRational){1,1};
542 outlink->w = s->w;
543 outlink->h = s->h;
544 outlink->frame_rate = s->frame_rate;
545 outlink->time_base = av_inv_q(outlink->frame_rate);
546
547 av_frame_free(&s->video);
548 s->video = ff_get_video_buffer(outlink, outlink->w, outlink->h);
549 if (!s->video)
550 return AVERROR(ENOMEM);
551
552 return 0;
553 }
554
555 static av_cold int init(AVFilterContext *ctx)
556 {
557 AudioFIRContext *s = ctx->priv;
558 AVFilterPad pad, vpad;
559 int ret;
560
561 pad = (AVFilterPad) {
562 .name = "main",
563 .type = AVMEDIA_TYPE_AUDIO,
564 };
565
566 ret = ff_append_inpad(ctx, &pad);
567 if (ret < 0)
568 return ret;
569
570 for (int n = 0; n < s->nb_irs; n++) {
571 pad = (AVFilterPad) {
572 .name = av_asprintf("ir%d", n),
573 .type = AVMEDIA_TYPE_AUDIO,
574 };
575
576 if (!pad.name)
577 return AVERROR(ENOMEM);
578
579 ret = ff_append_inpad_free_name(ctx, &pad);
580 if (ret < 0)
581 return ret;
582 }
583
584 pad = (AVFilterPad) {
585 .name = "default",
586 .type = AVMEDIA_TYPE_AUDIO,
587 .config_props = config_output,
588 };
589
590 ret = ff_append_outpad(ctx, &pad);
591 if (ret < 0)
592 return ret;
593
594 if (s->response) {
595 vpad = (AVFilterPad){
596 .name = "filter_response",
597 .type = AVMEDIA_TYPE_VIDEO,
598 .config_props = config_video,
599 };
600
601 ret = ff_append_outpad(ctx, &vpad);
602 if (ret < 0)
603 return ret;
604 }
605
606 s->fdsp = avpriv_float_dsp_alloc(0);
607 if (!s->fdsp)
608 return AVERROR(ENOMEM);
609
610 ff_afir_init(&s->afirdsp);
611
612 return 0;
613 }
614
615 static int process_command(AVFilterContext *ctx,
616 const char *cmd,
617 const char *arg,
618 char *res,
619 int res_len,
620 int flags)
621 {
622 AudioFIRContext *s = ctx->priv;
623 int prev_ir = s->selir;
624 int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
625
626 if (ret < 0)
627 return ret;
628
629 s->selir = FFMIN(s->nb_irs - 1, s->selir);
630
631 if (prev_ir != s->selir) {
632 s->have_coeffs = 0;
633 }
634
635 return 0;
636 }
637
638 #define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
639 #define AFR AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
640 #define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
641 #define OFFSET(x) offsetof(AudioFIRContext, x)
642
643 static const AVOption afir_options[] = {
644 { "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
645 { "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
646 { "length", "set IR length", OFFSET(length), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
647 { "gtype", "set IR auto gain type",OFFSET(gtype), AV_OPT_TYPE_INT, {.i64=0}, -1, 2, AF, "gtype" },
648 { "none", "without auto gain", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "gtype" },
649 { "peak", "peak gain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "gtype" },
650 { "dc", "DC gain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "gtype" },
651 { "gn", "gain to noise", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "gtype" },
652 { "irgain", "set IR gain", OFFSET(ir_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
653 { "irfmt", "set IR format", OFFSET(ir_format), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "irfmt" },
654 { "mono", "single channel", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "irfmt" },
655 { "input", "same as input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "irfmt" },
656 { "maxir", "set max IR length", OFFSET(max_ir_len), AV_OPT_TYPE_FLOAT, {.dbl=30}, 0.1, 60, AF },
657 { "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
658 { "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
659 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF },
660 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT32_MAX, VF },
661 { "minp", "set min partition size", OFFSET(minp), AV_OPT_TYPE_INT, {.i64=8192}, 1, 32768, AF },
662 { "maxp", "set max partition size", OFFSET(maxp), AV_OPT_TYPE_INT, {.i64=8192}, 8, 32768, AF },
663 { "nbirs", "set number of input IRs",OFFSET(nb_irs),AV_OPT_TYPE_INT, {.i64=1}, 1, 32, AF },
664 { "ir", "select IR", OFFSET(selir), AV_OPT_TYPE_INT, {.i64=0}, 0, 31, AFR },
665 { "precision", "set processing precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, AF, "precision" },
666 { "auto", "set auto processing precision", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" },
667 { "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" },
668 { "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" },
669 { NULL }
670 };
671
672 AVFILTER_DEFINE_CLASS(afir);
673
674 const AVFilter ff_af_afir = {
675 .name = "afir",
676 .description = NULL_IF_CONFIG_SMALL("Apply Finite Impulse Response filter with supplied coefficients in additional stream(s)."),
677 .priv_size = sizeof(AudioFIRContext),
678 .priv_class = &afir_class,
679 FILTER_QUERY_FUNC(query_formats),
680 .init = init,
681 .activate = activate,
682 .uninit = uninit,
683 .process_command = process_command,
684 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS |
685 AVFILTER_FLAG_DYNAMIC_OUTPUTS |
686 AVFILTER_FLAG_SLICE_THREADS,
687 };
688