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
drawtext(AVFrame * pic,int x,int y,const char * txt,uint32_t color)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
draw_line(AVFrame * out,int x0,int y0,int x1,int y1,uint32_t color)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
fir_channel(AVFilterContext * ctx,AVFrame * out,int ch)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
fir_channels(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)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
fir_frame(AudioFIRContext * s,AVFrame * in,AVFilterLink * outlink)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
init_segment(AVFilterContext * ctx,AudioFIRSegment * seg,int offset,int nb_partitions,int part_size)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
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
uninit_segment(AVFilterContext * ctx,AudioFIRSegment * seg)213 static void uninit_segment(AVFilterContext *ctx, AudioFIRSegment *seg)
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
convert_coeffs(AVFilterContext * ctx)245 static int convert_coeffs(AVFilterContext *ctx)
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
check_ir(AVFilterLink * link)334 static int check_ir(AVFilterLink *link)
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
activate(AVFilterContext * ctx)350 static int activate(AVFilterContext *ctx)
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
358 FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
359 if (s->response)
360 FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[1], ctx);
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]) {
379 ret = convert_coeffs(ctx);
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) {
408 ff_filter_set_ready(ctx, 10);
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
query_formats(AVFilterContext * ctx)437 static int query_formats(AVFilterContext *ctx)
438 {
439 AudioFIRContext *s = ctx->priv;
440 static const enum AVSampleFormat sample_fmts[3][3] = {
441 { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE },
442 { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
443 { AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE },
444 };
445 static const enum AVPixelFormat pix_fmts[] = {
446 AV_PIX_FMT_RGB0,
447 AV_PIX_FMT_NONE
448 };
449 int ret;
450
451 if (s->response) {
452 AVFilterLink *videolink = ctx->outputs[1];
453 AVFilterFormats *formats = ff_make_format_list(pix_fmts);
454 if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0)
455 return ret;
456 }
457
458 if (s->ir_format) {
459 ret = ff_set_common_all_channel_counts(ctx);
460 if (ret < 0)
461 return ret;
462 } else {
463 AVFilterChannelLayouts *mono = NULL;
464 AVFilterChannelLayouts *layouts = ff_all_channel_counts();
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
471 ret = ff_add_channel_layout(&mono, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO);
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
483 return ff_set_common_all_samplerates(ctx);
484 }
485
config_output(AVFilterLink * outlink)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
496 FF_DISABLE_DEPRECATION_WARNINGS
497 outlink->channel_layout = ctx->inputs[0]->channel_layout;
498 FF_ENABLE_DEPRECATION_WARNINGS
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
uninit(AVFilterContext * ctx)511 static av_cold void uninit(AVFilterContext *ctx)
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
config_video(AVFilterLink * outlink)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
init(AVFilterContext * ctx)547 static av_cold int init(AVFilterContext *ctx)
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
571 ret = ff_append_inpad_free_name(ctx, &pad);
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
process_command(AVFilterContext * ctx,const char * cmd,const char * arg,char * res,int res_len,int flags)607 static int process_command(AVFilterContext *ctx,
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
664 AVFILTER_DEFINE_CLASS(afir);
665
666 const AVFilter ff_af_afir = {
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,
671 FILTER_QUERY_FUNC(query_formats),
672 .init = init,
673 .activate = activate,
674 .uninit = uninit,
675 .process_command = process_command,
676 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS |
677 AVFILTER_FLAG_DYNAMIC_OUTPUTS |
678 AVFILTER_FLAG_SLICE_THREADS,
679 };
680