2018-01-02 15:30:54 +02:00
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/*
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* Copyright (c) 2018 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2018-01-07 10:43:50 +02:00
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#include <float.h>
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2018-01-02 15:30:54 +02:00
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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2018-05-30 12:43:09 +02:00
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#include "libavutil/intreadwrite.h"
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2018-01-02 15:30:54 +02:00
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#include "libavutil/opt.h"
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2018-05-30 12:43:09 +02:00
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#include "libavutil/xga_font_data.h"
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2018-01-02 15:30:54 +02:00
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#include "audio.h"
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#include "avfilter.h"
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#include "internal.h"
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2018-01-09 11:32:14 +02:00
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typedef struct ThreadData {
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AVFrame *in, *out;
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} ThreadData;
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2018-01-08 22:14:23 +02:00
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typedef struct Pair {
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int a, b;
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} Pair;
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typedef struct BiquadContext {
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2019-11-22 17:13:06 +02:00
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double a[3];
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double b[3];
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2020-10-16 22:51:16 +02:00
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double w1, w2;
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2018-01-08 22:14:23 +02:00
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} BiquadContext;
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2018-01-09 18:46:27 +02:00
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typedef struct IIRChannel {
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int nb_ab[2];
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double *ab[2];
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double g;
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double *cache[2];
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2020-10-15 17:29:04 +02:00
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double fir;
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2018-01-09 18:46:27 +02:00
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BiquadContext *biquads;
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int clippings;
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} IIRChannel;
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2018-01-02 15:30:54 +02:00
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typedef struct AudioIIRContext {
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const AVClass *class;
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2018-01-07 22:16:25 +02:00
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char *a_str, *b_str, *g_str;
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2018-01-02 15:30:54 +02:00
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double dry_gain, wet_gain;
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2019-07-08 16:44:53 +02:00
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double mix;
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2020-05-22 12:28:03 +02:00
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int normalize;
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2018-01-07 10:43:50 +02:00
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int format;
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2018-01-08 22:14:23 +02:00
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int process;
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int precision;
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2018-05-30 12:43:09 +02:00
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int response;
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int w, h;
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int ir_channel;
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2018-11-08 13:51:12 +02:00
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AVRational rate;
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2018-05-30 12:43:09 +02:00
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AVFrame *video;
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2018-01-02 15:30:54 +02:00
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2018-01-09 18:46:27 +02:00
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IIRChannel *iir;
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2018-01-02 15:30:54 +02:00
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int channels;
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2018-01-08 22:14:23 +02:00
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enum AVSampleFormat sample_format;
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2018-01-02 15:30:54 +02:00
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2018-01-09 11:32:14 +02:00
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int (*iir_channel)(AVFilterContext *ctx, void *arg, int ch, int nb_jobs);
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2018-01-02 15:30:54 +02:00
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} AudioIIRContext;
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static int query_formats(AVFilterContext *ctx)
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{
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2018-01-08 22:14:23 +02:00
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AudioIIRContext *s = ctx->priv;
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2018-01-02 15:30:54 +02:00
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AVFilterFormats *formats;
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AVFilterChannelLayouts *layouts;
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2018-01-08 22:14:23 +02:00
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enum AVSampleFormat sample_fmts[] = {
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2018-01-02 15:30:54 +02:00
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AV_SAMPLE_FMT_DBLP,
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AV_SAMPLE_FMT_NONE
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};
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2018-05-30 12:43:09 +02:00
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_RGB0,
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AV_PIX_FMT_NONE
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};
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2018-01-02 15:30:54 +02:00
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int ret;
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2018-05-30 12:43:09 +02:00
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if (s->response) {
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AVFilterLink *videolink = ctx->outputs[1];
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formats = ff_make_format_list(pix_fmts);
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2020-08-24 12:16:34 +02:00
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if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0)
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2018-05-30 12:43:09 +02:00
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return ret;
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}
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2018-01-02 15:30:54 +02:00
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layouts = ff_all_channel_counts();
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if (!layouts)
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return AVERROR(ENOMEM);
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ret = ff_set_common_channel_layouts(ctx, layouts);
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if (ret < 0)
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return ret;
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2018-01-08 22:14:23 +02:00
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sample_fmts[0] = s->sample_format;
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2018-01-02 15:30:54 +02:00
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formats = ff_make_format_list(sample_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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ret = ff_set_common_formats(ctx, formats);
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if (ret < 0)
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return ret;
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formats = ff_all_samplerates();
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_samplerates(ctx, formats);
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}
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2018-01-09 11:32:14 +02:00
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#define IIR_CH(name, type, min, max, need_clipping) \
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static int iir_ch_## name(AVFilterContext *ctx, void *arg, int ch, int nb_jobs) \
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2018-01-02 15:30:54 +02:00
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{ \
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AudioIIRContext *s = ctx->priv; \
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const double ig = s->dry_gain; \
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const double og = s->wet_gain; \
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2019-07-08 16:44:53 +02:00
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const double mix = s->mix; \
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2018-01-09 11:32:14 +02:00
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ThreadData *td = arg; \
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AVFrame *in = td->in, *out = td->out; \
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const type *src = (const type *)in->extended_data[ch]; \
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2020-05-19 20:03:59 +02:00
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double *oc = (double *)s->iir[ch].cache[0]; \
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double *ic = (double *)s->iir[ch].cache[1]; \
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2018-01-09 18:46:27 +02:00
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const int nb_a = s->iir[ch].nb_ab[0]; \
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const int nb_b = s->iir[ch].nb_ab[1]; \
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const double *a = s->iir[ch].ab[0]; \
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const double *b = s->iir[ch].ab[1]; \
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2019-07-13 12:25:54 +02:00
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const double g = s->iir[ch].g; \
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2018-01-09 18:46:27 +02:00
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int *clippings = &s->iir[ch].clippings; \
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2018-01-09 11:32:14 +02:00
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type *dst = (type *)out->extended_data[ch]; \
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int n; \
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2018-01-02 15:30:54 +02:00
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\
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2018-01-09 11:32:14 +02:00
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for (n = 0; n < in->nb_samples; n++) { \
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double sample = 0.; \
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int x; \
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2018-01-02 15:30:54 +02:00
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\
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2018-01-09 11:32:14 +02:00
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memmove(&ic[1], &ic[0], (nb_b - 1) * sizeof(*ic)); \
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memmove(&oc[1], &oc[0], (nb_a - 1) * sizeof(*oc)); \
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ic[0] = src[n] * ig; \
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for (x = 0; x < nb_b; x++) \
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sample += b[x] * ic[x]; \
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2018-01-02 15:30:54 +02:00
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\
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2018-01-09 11:32:14 +02:00
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for (x = 1; x < nb_a; x++) \
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sample -= a[x] * oc[x]; \
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2018-01-02 15:30:54 +02:00
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\
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2018-01-09 11:32:14 +02:00
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oc[0] = sample; \
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2019-07-13 12:25:54 +02:00
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sample *= og * g; \
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2019-07-08 16:44:53 +02:00
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sample = sample * mix + ic[0] * (1. - mix); \
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2018-01-09 11:32:14 +02:00
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if (need_clipping && sample < min) { \
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2018-01-10 20:24:41 +02:00
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(*clippings)++; \
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2018-01-09 11:32:14 +02:00
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dst[n] = min; \
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} else if (need_clipping && sample > max) { \
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2018-01-10 20:24:41 +02:00
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(*clippings)++; \
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2018-01-09 11:32:14 +02:00
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dst[n] = max; \
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} else { \
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dst[n] = sample; \
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2018-01-02 15:30:54 +02:00
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} \
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} \
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2018-01-09 11:32:14 +02:00
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\
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return 0; \
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2018-01-02 15:30:54 +02:00
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}
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2018-01-09 11:32:14 +02:00
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IIR_CH(s16p, int16_t, INT16_MIN, INT16_MAX, 1)
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IIR_CH(s32p, int32_t, INT32_MIN, INT32_MAX, 1)
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IIR_CH(fltp, float, -1., 1., 0)
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IIR_CH(dblp, double, -1., 1., 0)
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2018-01-02 15:30:54 +02:00
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2020-10-16 22:51:16 +02:00
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#define SERIAL_IIR_CH(name, type, min, max, need_clipping) \
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static int iir_ch_serial_## name(AVFilterContext *ctx, void *arg, \
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int ch, int nb_jobs) \
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2018-01-08 22:14:23 +02:00
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{ \
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AudioIIRContext *s = ctx->priv; \
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const double ig = s->dry_gain; \
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const double og = s->wet_gain; \
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2019-07-08 16:44:53 +02:00
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const double mix = s->mix; \
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2020-10-15 17:29:04 +02:00
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const double imix = 1. - mix; \
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2018-01-09 11:32:14 +02:00
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ThreadData *td = arg; \
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AVFrame *in = td->in, *out = td->out; \
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const type *src = (const type *)in->extended_data[ch]; \
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type *dst = (type *)out->extended_data[ch]; \
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2018-01-09 18:46:27 +02:00
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IIRChannel *iir = &s->iir[ch]; \
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2019-07-13 12:25:54 +02:00
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const double g = iir->g; \
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2018-01-09 18:46:27 +02:00
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int *clippings = &iir->clippings; \
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int nb_biquads = (FFMAX(iir->nb_ab[0], iir->nb_ab[1]) + 1) / 2; \
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2018-01-09 11:32:14 +02:00
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int n, i; \
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2018-01-08 22:14:23 +02:00
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\
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2020-10-17 18:23:35 +02:00
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for (i = nb_biquads - 1; i >= 0; i--) { \
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2019-11-22 17:13:06 +02:00
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const double a1 = -iir->biquads[i].a[1]; \
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const double a2 = -iir->biquads[i].a[2]; \
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const double b0 = iir->biquads[i].b[0]; \
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const double b1 = iir->biquads[i].b[1]; \
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const double b2 = iir->biquads[i].b[2]; \
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2020-10-16 22:51:16 +02:00
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double w1 = iir->biquads[i].w1; \
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double w2 = iir->biquads[i].w2; \
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2018-01-08 22:14:23 +02:00
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\
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2018-01-09 11:32:14 +02:00
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for (n = 0; n < in->nb_samples; n++) { \
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2020-10-15 17:29:04 +02:00
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double i0 = ig * (i ? dst[n] : src[n]); \
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2020-10-16 22:51:16 +02:00
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double o0 = i0 * b0 + w1; \
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2018-01-08 22:14:23 +02:00
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\
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2020-10-16 22:51:16 +02:00
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w1 = b1 * i0 + w2 + a1 * o0; \
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w2 = b2 * i0 + a2 * o0; \
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2019-07-13 12:25:54 +02:00
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o0 *= og * g; \
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2018-01-08 22:14:23 +02:00
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\
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2020-10-15 17:29:04 +02:00
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o0 = o0 * mix + imix * i0; \
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2018-01-09 11:32:14 +02:00
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if (need_clipping && o0 < min) { \
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2018-01-10 20:24:41 +02:00
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(*clippings)++; \
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2018-01-09 11:32:14 +02:00
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dst[n] = min; \
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} else if (need_clipping && o0 > max) { \
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2018-01-10 20:24:41 +02:00
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(*clippings)++; \
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2018-01-09 11:32:14 +02:00
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dst[n] = max; \
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} else { \
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dst[n] = o0; \
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2018-01-08 22:14:23 +02:00
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} \
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} \
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2020-10-16 22:51:16 +02:00
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iir->biquads[i].w1 = w1; \
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iir->biquads[i].w2 = w2; \
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2018-01-08 22:14:23 +02:00
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} \
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2018-01-09 11:32:14 +02:00
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\
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return 0; \
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2018-01-08 22:14:23 +02:00
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}
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2018-01-09 11:32:14 +02:00
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SERIAL_IIR_CH(s16p, int16_t, INT16_MIN, INT16_MAX, 1)
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SERIAL_IIR_CH(s32p, int32_t, INT32_MIN, INT32_MAX, 1)
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SERIAL_IIR_CH(fltp, float, -1., 1., 0)
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SERIAL_IIR_CH(dblp, double, -1., 1., 0)
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2018-01-08 22:14:23 +02:00
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2020-10-15 17:29:04 +02:00
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#define PARALLEL_IIR_CH(name, type, min, max, need_clipping) \
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static int iir_ch_parallel_## name(AVFilterContext *ctx, void *arg, \
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int ch, int nb_jobs) \
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{ \
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AudioIIRContext *s = ctx->priv; \
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const double ig = s->dry_gain; \
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const double og = s->wet_gain; \
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const double mix = s->mix; \
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const double imix = 1. - mix; \
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ThreadData *td = arg; \
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AVFrame *in = td->in, *out = td->out; \
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const type *src = (const type *)in->extended_data[ch]; \
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type *dst = (type *)out->extended_data[ch]; \
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IIRChannel *iir = &s->iir[ch]; \
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const double g = iir->g; \
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const double fir = iir->fir; \
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int *clippings = &iir->clippings; \
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int nb_biquads = (FFMAX(iir->nb_ab[0], iir->nb_ab[1]) + 1) / 2; \
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int n, i; \
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\
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for (i = 0; i < nb_biquads; i++) { \
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const double a1 = -iir->biquads[i].a[1]; \
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const double a2 = -iir->biquads[i].a[2]; \
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const double b1 = iir->biquads[i].b[1]; \
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const double b2 = iir->biquads[i].b[2]; \
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2020-10-16 22:51:16 +02:00
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double w1 = iir->biquads[i].w1; \
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double w2 = iir->biquads[i].w2; \
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2020-10-15 17:29:04 +02:00
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\
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for (n = 0; n < in->nb_samples; n++) { \
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double i0 = ig * src[n]; \
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2020-10-16 22:51:16 +02:00
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double o0 = w1; \
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2020-10-15 17:29:04 +02:00
|
|
|
\
|
2020-10-16 22:51:16 +02:00
|
|
|
w1 = b1 * i0 + w2 + a1 * o0; \
|
|
|
|
w2 = b2 * i0 + a2 * o0; \
|
2020-10-15 17:29:04 +02:00
|
|
|
o0 *= og * g; \
|
|
|
|
o0 += dst[n]; \
|
|
|
|
\
|
|
|
|
if (need_clipping && o0 < min) { \
|
|
|
|
(*clippings)++; \
|
|
|
|
dst[n] = min; \
|
|
|
|
} else if (need_clipping && o0 > max) { \
|
|
|
|
(*clippings)++; \
|
|
|
|
dst[n] = max; \
|
|
|
|
} else { \
|
|
|
|
dst[n] = o0; \
|
|
|
|
} \
|
|
|
|
} \
|
2020-10-16 22:51:16 +02:00
|
|
|
iir->biquads[i].w1 = w1; \
|
|
|
|
iir->biquads[i].w2 = w2; \
|
2020-10-15 17:29:04 +02:00
|
|
|
} \
|
|
|
|
\
|
|
|
|
for (n = 0; n < in->nb_samples; n++) { \
|
|
|
|
dst[n] += fir * src[n]; \
|
|
|
|
dst[n] = dst[n] * mix + imix * src[n]; \
|
|
|
|
} \
|
|
|
|
\
|
|
|
|
return 0; \
|
|
|
|
}
|
|
|
|
|
|
|
|
PARALLEL_IIR_CH(s16p, int16_t, INT16_MIN, INT16_MAX, 1)
|
|
|
|
PARALLEL_IIR_CH(s32p, int32_t, INT32_MIN, INT32_MAX, 1)
|
|
|
|
PARALLEL_IIR_CH(fltp, float, -1., 1., 0)
|
|
|
|
PARALLEL_IIR_CH(dblp, double, -1., 1., 0)
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
static void count_coefficients(char *item_str, int *nb_items)
|
|
|
|
{
|
|
|
|
char *p;
|
|
|
|
|
2018-01-05 20:55:09 +02:00
|
|
|
if (!item_str)
|
|
|
|
return;
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
*nb_items = 1;
|
|
|
|
for (p = item_str; *p && *p != '|'; p++) {
|
|
|
|
if (*p == ' ')
|
|
|
|
(*nb_items)++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
static int read_gains(AVFilterContext *ctx, char *item_str, int nb_items)
|
2018-01-07 22:16:25 +02:00
|
|
|
{
|
2018-01-09 18:46:27 +02:00
|
|
|
AudioIIRContext *s = ctx->priv;
|
2018-01-07 22:16:25 +02:00
|
|
|
char *p, *arg, *old_str, *prev_arg = NULL, *saveptr = NULL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
p = old_str = av_strdup(item_str);
|
|
|
|
if (!p)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < nb_items; i++) {
|
|
|
|
if (!(arg = av_strtok(p, "|", &saveptr)))
|
|
|
|
arg = prev_arg;
|
|
|
|
|
|
|
|
if (!arg) {
|
|
|
|
av_freep(&old_str);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
p = NULL;
|
2020-10-17 18:30:27 +02:00
|
|
|
if (av_sscanf(arg, "%lf", &s->iir[i].g) != 1) {
|
2018-01-07 22:16:25 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid gains supplied: %s\n", arg);
|
|
|
|
av_freep(&old_str);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
prev_arg = arg;
|
|
|
|
}
|
|
|
|
|
|
|
|
av_freep(&old_str);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-01-07 10:43:50 +02:00
|
|
|
static int read_tf_coefficients(AVFilterContext *ctx, char *item_str, int nb_items, double *dst)
|
2018-01-02 15:30:54 +02:00
|
|
|
{
|
|
|
|
char *p, *arg, *old_str, *saveptr = NULL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
p = old_str = av_strdup(item_str);
|
|
|
|
if (!p)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < nb_items; i++) {
|
|
|
|
if (!(arg = av_strtok(p, " ", &saveptr)))
|
|
|
|
break;
|
|
|
|
|
|
|
|
p = NULL;
|
2020-10-17 18:30:27 +02:00
|
|
|
if (av_sscanf(arg, "%lf", &dst[i]) != 1) {
|
2018-01-02 15:30:54 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid coefficients supplied: %s\n", arg);
|
2018-01-07 22:16:25 +02:00
|
|
|
av_freep(&old_str);
|
2018-01-02 15:30:54 +02:00
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
av_freep(&old_str);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-01-10 21:25:50 +02:00
|
|
|
static int read_zp_coefficients(AVFilterContext *ctx, char *item_str, int nb_items, double *dst, const char *format)
|
2018-01-02 15:30:54 +02:00
|
|
|
{
|
2018-01-07 10:43:50 +02:00
|
|
|
char *p, *arg, *old_str, *saveptr = NULL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
p = old_str = av_strdup(item_str);
|
|
|
|
if (!p)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < nb_items; i++) {
|
|
|
|
if (!(arg = av_strtok(p, " ", &saveptr)))
|
|
|
|
break;
|
|
|
|
|
|
|
|
p = NULL;
|
2020-10-17 18:30:27 +02:00
|
|
|
if (av_sscanf(arg, format, &dst[i*2], &dst[i*2+1]) != 2) {
|
2018-01-07 22:16:25 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid coefficients supplied: %s\n", arg);
|
|
|
|
av_freep(&old_str);
|
|
|
|
return AVERROR(EINVAL);
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
av_freep(&old_str);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-05-29 22:05:01 +02:00
|
|
|
static const char *format[] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" };
|
2018-01-10 21:25:50 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
static int read_channels(AVFilterContext *ctx, int channels, uint8_t *item_str, int ab)
|
2018-01-07 10:43:50 +02:00
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
2018-01-02 15:30:54 +02:00
|
|
|
char *p, *arg, *old_str, *prev_arg = NULL, *saveptr = NULL;
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
p = old_str = av_strdup(item_str);
|
|
|
|
if (!p)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < channels; i++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
IIRChannel *iir = &s->iir[i];
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
if (!(arg = av_strtok(p, "|", &saveptr)))
|
|
|
|
arg = prev_arg;
|
|
|
|
|
2018-01-07 22:16:25 +02:00
|
|
|
if (!arg) {
|
|
|
|
av_freep(&old_str);
|
2018-01-05 20:55:09 +02:00
|
|
|
return AVERROR(EINVAL);
|
2018-01-07 22:16:25 +02:00
|
|
|
}
|
2018-01-05 20:55:09 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
count_coefficients(arg, &iir->nb_ab[ab]);
|
2018-01-05 20:55:09 +02:00
|
|
|
|
|
|
|
p = NULL;
|
2018-01-09 18:46:27 +02:00
|
|
|
iir->cache[ab] = av_calloc(iir->nb_ab[ab] + 1, sizeof(double));
|
2018-01-10 21:25:50 +02:00
|
|
|
iir->ab[ab] = av_calloc(iir->nb_ab[ab] * (!!s->format + 1), sizeof(double));
|
2018-01-09 18:46:27 +02:00
|
|
|
if (!iir->ab[ab] || !iir->cache[ab]) {
|
2018-01-07 22:16:25 +02:00
|
|
|
av_freep(&old_str);
|
2018-01-02 15:30:54 +02:00
|
|
|
return AVERROR(ENOMEM);
|
2018-01-07 22:16:25 +02:00
|
|
|
}
|
2018-01-02 15:30:54 +02:00
|
|
|
|
2020-10-18 18:25:51 +02:00
|
|
|
if (s->format > 0) {
|
2018-01-10 21:25:50 +02:00
|
|
|
ret = read_zp_coefficients(ctx, arg, iir->nb_ab[ab], iir->ab[ab], format[s->format]);
|
2018-01-07 10:43:50 +02:00
|
|
|
} else {
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = read_tf_coefficients(ctx, arg, iir->nb_ab[ab], iir->ab[ab]);
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
2018-01-07 22:16:25 +02:00
|
|
|
if (ret < 0) {
|
|
|
|
av_freep(&old_str);
|
2018-01-02 15:30:54 +02:00
|
|
|
return ret;
|
2018-01-07 22:16:25 +02:00
|
|
|
}
|
2018-01-02 15:30:54 +02:00
|
|
|
prev_arg = arg;
|
|
|
|
}
|
|
|
|
|
|
|
|
av_freep(&old_str);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
static void cmul(double re, double im, double re2, double im2, double *RE, double *IM)
|
2018-01-07 10:43:50 +02:00
|
|
|
{
|
2020-05-30 17:55:32 +02:00
|
|
|
*RE = re * re2 - im * im2;
|
|
|
|
*IM = re * im2 + re2 * im;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
static int expand(AVFilterContext *ctx, double *pz, int n, double *coefs)
|
2018-01-07 10:43:50 +02:00
|
|
|
{
|
2020-05-30 17:55:32 +02:00
|
|
|
coefs[2 * n] = 1.0;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
for (int i = 1; i <= n; i++) {
|
|
|
|
for (int j = n - i; j < n; j++) {
|
|
|
|
double re, im;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
cmul(coefs[2 * (j + 1)], coefs[2 * (j + 1) + 1],
|
|
|
|
pz[2 * (i - 1)], pz[2 * (i - 1) + 1], &re, &im);
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
coefs[2 * j] -= re;
|
|
|
|
coefs[2 * j + 1] -= im;
|
|
|
|
}
|
|
|
|
}
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-30 17:55:32 +02:00
|
|
|
for (int i = 0; i < n + 1; i++) {
|
|
|
|
if (fabs(coefs[2 * i + 1]) > FLT_EPSILON) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "coefs: %f of z^%d is not real; poles/zeros are not complex conjugates.\n",
|
|
|
|
coefs[2 * i + 1], i);
|
2018-01-07 10:43:50 +02:00
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-05-22 12:28:03 +02:00
|
|
|
static void normalize_coeffs(AVFilterContext *ctx, int ch)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
double sum_den = 0.;
|
|
|
|
|
|
|
|
if (!s->normalize)
|
|
|
|
return;
|
|
|
|
|
|
|
|
for (int i = 0; i < iir->nb_ab[1]; i++) {
|
|
|
|
sum_den += iir->ab[1][i];
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sum_den > 1e-6) {
|
|
|
|
double factor, sum_num = 0.;
|
|
|
|
|
|
|
|
for (int i = 0; i < iir->nb_ab[0]; i++) {
|
|
|
|
sum_num += iir->ab[0][i];
|
|
|
|
}
|
|
|
|
|
|
|
|
factor = sum_num / sum_den;
|
|
|
|
|
|
|
|
for (int i = 0; i < iir->nb_ab[1]; i++) {
|
|
|
|
iir->ab[1][i] *= factor;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-01-07 10:43:50 +02:00
|
|
|
static int convert_zp2tf(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
2018-01-10 19:38:01 +02:00
|
|
|
int ch, i, j, ret = 0;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
IIRChannel *iir = &s->iir[ch];
|
2018-01-07 22:16:25 +02:00
|
|
|
double *topc, *botc;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-30 10:55:28 +02:00
|
|
|
topc = av_calloc((iir->nb_ab[1] + 1) * 2, sizeof(*topc));
|
|
|
|
botc = av_calloc((iir->nb_ab[0] + 1) * 2, sizeof(*botc));
|
2018-01-10 19:38:01 +02:00
|
|
|
if (!topc || !botc) {
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
|
|
|
}
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = expand(ctx, iir->ab[0], iir->nb_ab[0], botc);
|
2018-01-07 10:43:50 +02:00
|
|
|
if (ret < 0) {
|
2018-01-10 19:38:01 +02:00
|
|
|
goto fail;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = expand(ctx, iir->ab[1], iir->nb_ab[1], topc);
|
2018-01-07 10:43:50 +02:00
|
|
|
if (ret < 0) {
|
2018-01-10 19:38:01 +02:00
|
|
|
goto fail;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
for (j = 0, i = iir->nb_ab[1]; i >= 0; j++, i--) {
|
|
|
|
iir->ab[1][j] = topc[2 * i];
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
2018-01-09 18:46:27 +02:00
|
|
|
iir->nb_ab[1]++;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
for (j = 0, i = iir->nb_ab[0]; i >= 0; j++, i--) {
|
|
|
|
iir->ab[0][j] = botc[2 * i];
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
2018-01-09 18:46:27 +02:00
|
|
|
iir->nb_ab[0]++;
|
2018-01-07 10:43:50 +02:00
|
|
|
|
2020-05-22 12:28:03 +02:00
|
|
|
normalize_coeffs(ctx, ch);
|
|
|
|
|
2018-01-10 19:38:01 +02:00
|
|
|
fail:
|
2018-01-07 10:43:50 +02:00
|
|
|
av_free(topc);
|
|
|
|
av_free(botc);
|
2018-01-10 19:38:01 +02:00
|
|
|
if (ret < 0)
|
|
|
|
break;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2018-01-10 19:38:01 +02:00
|
|
|
return ret;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2018-01-08 22:14:23 +02:00
|
|
|
static int decompose_zp2biquads(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch, ret;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
int nb_biquads = (FFMAX(iir->nb_ab[0], iir->nb_ab[1]) + 1) / 2;
|
2018-01-08 22:14:23 +02:00
|
|
|
int current_biquad = 0;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
iir->biquads = av_calloc(nb_biquads, sizeof(BiquadContext));
|
|
|
|
if (!iir->biquads)
|
2018-01-08 22:14:23 +02:00
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
while (nb_biquads--) {
|
|
|
|
Pair outmost_pole = { -1, -1 };
|
|
|
|
Pair nearest_zero = { -1, -1 };
|
|
|
|
double zeros[4] = { 0 };
|
|
|
|
double poles[4] = { 0 };
|
|
|
|
double b[6] = { 0 };
|
|
|
|
double a[6] = { 0 };
|
|
|
|
double min_distance = DBL_MAX;
|
|
|
|
double max_mag = 0;
|
2019-11-22 18:42:04 +02:00
|
|
|
double factor;
|
2018-01-08 22:14:23 +02:00
|
|
|
int i;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
for (i = 0; i < iir->nb_ab[0]; i++) {
|
2018-01-08 22:14:23 +02:00
|
|
|
double mag;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
if (isnan(iir->ab[0][2 * i]) || isnan(iir->ab[0][2 * i + 1]))
|
2018-01-08 22:14:23 +02:00
|
|
|
continue;
|
2018-01-09 18:46:27 +02:00
|
|
|
mag = hypot(iir->ab[0][2 * i], iir->ab[0][2 * i + 1]);
|
2018-01-08 22:14:23 +02:00
|
|
|
|
|
|
|
if (mag > max_mag) {
|
|
|
|
max_mag = mag;
|
|
|
|
outmost_pole.a = i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-11-22 00:23:55 +02:00
|
|
|
for (i = 0; i < iir->nb_ab[0]; i++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
if (isnan(iir->ab[0][2 * i]) || isnan(iir->ab[0][2 * i + 1]))
|
2018-01-08 22:14:23 +02:00
|
|
|
continue;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
if (iir->ab[0][2 * i ] == iir->ab[0][2 * outmost_pole.a ] &&
|
|
|
|
iir->ab[0][2 * i + 1] == -iir->ab[0][2 * outmost_pole.a + 1]) {
|
2018-01-08 22:14:23 +02:00
|
|
|
outmost_pole.b = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "outmost_pole is %d.%d\n", outmost_pole.a, outmost_pole.b);
|
|
|
|
|
|
|
|
if (outmost_pole.a < 0 || outmost_pole.b < 0)
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
for (i = 0; i < iir->nb_ab[1]; i++) {
|
2018-01-08 22:14:23 +02:00
|
|
|
double distance;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
if (isnan(iir->ab[1][2 * i]) || isnan(iir->ab[1][2 * i + 1]))
|
2018-01-08 22:14:23 +02:00
|
|
|
continue;
|
2018-01-09 18:46:27 +02:00
|
|
|
distance = hypot(iir->ab[0][2 * outmost_pole.a ] - iir->ab[1][2 * i ],
|
|
|
|
iir->ab[0][2 * outmost_pole.a + 1] - iir->ab[1][2 * i + 1]);
|
2018-01-08 22:14:23 +02:00
|
|
|
|
|
|
|
if (distance < min_distance) {
|
|
|
|
min_distance = distance;
|
|
|
|
nearest_zero.a = i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
for (i = 0; i < iir->nb_ab[1]; i++) {
|
|
|
|
if (isnan(iir->ab[1][2 * i]) || isnan(iir->ab[1][2 * i + 1]))
|
2018-01-08 22:14:23 +02:00
|
|
|
continue;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
if (iir->ab[1][2 * i ] == iir->ab[1][2 * nearest_zero.a ] &&
|
|
|
|
iir->ab[1][2 * i + 1] == -iir->ab[1][2 * nearest_zero.a + 1]) {
|
2018-01-08 22:14:23 +02:00
|
|
|
nearest_zero.b = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "nearest_zero is %d.%d\n", nearest_zero.a, nearest_zero.b);
|
|
|
|
|
|
|
|
if (nearest_zero.a < 0 || nearest_zero.b < 0)
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
poles[0] = iir->ab[0][2 * outmost_pole.a ];
|
|
|
|
poles[1] = iir->ab[0][2 * outmost_pole.a + 1];
|
2018-01-08 22:14:23 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
zeros[0] = iir->ab[1][2 * nearest_zero.a ];
|
|
|
|
zeros[1] = iir->ab[1][2 * nearest_zero.a + 1];
|
2018-01-08 22:14:23 +02:00
|
|
|
|
|
|
|
if (nearest_zero.a == nearest_zero.b && outmost_pole.a == outmost_pole.b) {
|
|
|
|
zeros[2] = 0;
|
|
|
|
zeros[3] = 0;
|
|
|
|
|
|
|
|
poles[2] = 0;
|
|
|
|
poles[3] = 0;
|
|
|
|
} else {
|
2018-01-09 18:46:27 +02:00
|
|
|
poles[2] = iir->ab[0][2 * outmost_pole.b ];
|
|
|
|
poles[3] = iir->ab[0][2 * outmost_pole.b + 1];
|
2018-01-08 22:14:23 +02:00
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
zeros[2] = iir->ab[1][2 * nearest_zero.b ];
|
|
|
|
zeros[3] = iir->ab[1][2 * nearest_zero.b + 1];
|
2018-01-08 22:14:23 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = expand(ctx, zeros, 2, b);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = expand(ctx, poles, 2, a);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
iir->ab[0][2 * outmost_pole.a] = iir->ab[0][2 * outmost_pole.a + 1] = NAN;
|
|
|
|
iir->ab[0][2 * outmost_pole.b] = iir->ab[0][2 * outmost_pole.b + 1] = NAN;
|
|
|
|
iir->ab[1][2 * nearest_zero.a] = iir->ab[1][2 * nearest_zero.a + 1] = NAN;
|
|
|
|
iir->ab[1][2 * nearest_zero.b] = iir->ab[1][2 * nearest_zero.b + 1] = NAN;
|
2018-01-08 22:14:23 +02:00
|
|
|
|
2019-11-22 21:24:29 +02:00
|
|
|
iir->biquads[current_biquad].a[0] = 1.;
|
|
|
|
iir->biquads[current_biquad].a[1] = a[2] / a[4];
|
|
|
|
iir->biquads[current_biquad].a[2] = a[0] / a[4];
|
|
|
|
iir->biquads[current_biquad].b[0] = b[4] / a[4];
|
|
|
|
iir->biquads[current_biquad].b[1] = b[2] / a[4];
|
|
|
|
iir->biquads[current_biquad].b[2] = b[0] / a[4];
|
2019-11-22 18:42:04 +02:00
|
|
|
|
2020-05-22 12:28:03 +02:00
|
|
|
if (s->normalize &&
|
|
|
|
fabs(iir->biquads[current_biquad].b[0] +
|
2019-11-22 22:06:35 +02:00
|
|
|
iir->biquads[current_biquad].b[1] +
|
|
|
|
iir->biquads[current_biquad].b[2]) > 1e-6) {
|
|
|
|
factor = (iir->biquads[current_biquad].a[0] +
|
|
|
|
iir->biquads[current_biquad].a[1] +
|
|
|
|
iir->biquads[current_biquad].a[2]) /
|
|
|
|
(iir->biquads[current_biquad].b[0] +
|
|
|
|
iir->biquads[current_biquad].b[1] +
|
|
|
|
iir->biquads[current_biquad].b[2]);
|
|
|
|
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "factor=%f\n", factor);
|
|
|
|
|
|
|
|
iir->biquads[current_biquad].b[0] *= factor;
|
|
|
|
iir->biquads[current_biquad].b[1] *= factor;
|
|
|
|
iir->biquads[current_biquad].b[2] *= factor;
|
|
|
|
}
|
2019-11-22 18:42:04 +02:00
|
|
|
|
|
|
|
iir->biquads[current_biquad].b[0] *= (current_biquad ? 1.0 : iir->g);
|
|
|
|
iir->biquads[current_biquad].b[1] *= (current_biquad ? 1.0 : iir->g);
|
|
|
|
iir->biquads[current_biquad].b[2] *= (current_biquad ? 1.0 : iir->g);
|
2018-01-08 22:14:23 +02:00
|
|
|
|
2018-09-19 18:05:26 +02:00
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "a=%f %f %f:b=%f %f %f\n",
|
2019-11-22 17:13:06 +02:00
|
|
|
iir->biquads[current_biquad].a[0],
|
|
|
|
iir->biquads[current_biquad].a[1],
|
|
|
|
iir->biquads[current_biquad].a[2],
|
|
|
|
iir->biquads[current_biquad].b[0],
|
|
|
|
iir->biquads[current_biquad].b[1],
|
|
|
|
iir->biquads[current_biquad].b[2]);
|
2018-01-08 22:14:23 +02:00
|
|
|
|
|
|
|
current_biquad++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-10-15 17:29:04 +02:00
|
|
|
static void biquad_process(double *x, double *y, int length,
|
|
|
|
double b0, double b1, double b2,
|
|
|
|
double a1, double a2)
|
|
|
|
{
|
|
|
|
double w1 = 0., w2 = 0.;
|
|
|
|
|
|
|
|
a1 = -a1;
|
|
|
|
a2 = -a2;
|
|
|
|
|
|
|
|
for (int n = 0; n < length; n++) {
|
|
|
|
double out, in = x[n];
|
|
|
|
|
|
|
|
y[n] = out = in * b0 + w1;
|
|
|
|
w1 = b1 * in + w2 + a1 * out;
|
|
|
|
w2 = b2 * in + a2 * out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void solve(double *matrix, double *vector, int n, double *y, double *x, double *lu)
|
|
|
|
{
|
|
|
|
double sum = 0.;
|
|
|
|
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
|
|
for (int j = i; j < n; j++) {
|
|
|
|
sum = 0.;
|
|
|
|
for (int k = 0; k < i; k++)
|
|
|
|
sum += lu[i * n + k] * lu[k * n + j];
|
|
|
|
lu[i * n + j] = matrix[j * n + i] - sum;
|
|
|
|
}
|
|
|
|
for (int j = i + 1; j < n; j++) {
|
|
|
|
sum = 0.;
|
|
|
|
for (int k = 0; k < i; k++)
|
|
|
|
sum += lu[j * n + k] * lu[k * n + i];
|
|
|
|
lu[j * n + i] = (1. / lu[i * n + i]) * (matrix[i * n + j] - sum);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
|
|
sum = 0.;
|
|
|
|
for (int k = 0; k < i; k++)
|
|
|
|
sum += lu[i * n + k] * y[k];
|
|
|
|
y[i] = vector[i] - sum;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int i = n - 1; i >= 0; i--) {
|
|
|
|
sum = 0.;
|
|
|
|
for (int k = i + 1; k < n; k++)
|
|
|
|
sum += lu[i * n + k] * x[k];
|
|
|
|
x[i] = (1 / lu[i * n + i]) * (y[i] - sum);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int convert_serial2parallel(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
for (int ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
int nb_biquads = (FFMAX(iir->nb_ab[0], iir->nb_ab[1]) + 1) / 2;
|
|
|
|
int length = nb_biquads * 2 + 1;
|
|
|
|
double *impulse = av_calloc(length, sizeof(*impulse));
|
|
|
|
double *y = av_calloc(length, sizeof(*y));
|
|
|
|
double *resp = av_calloc(length, sizeof(*resp));
|
|
|
|
double *M = av_calloc((length - 1) * 2 * nb_biquads, sizeof(*M));
|
|
|
|
double *W = av_calloc((length - 1) * 2 * nb_biquads, sizeof(*W));
|
|
|
|
|
|
|
|
if (!impulse || !y || !resp || !M) {
|
|
|
|
av_free(impulse);
|
|
|
|
av_free(y);
|
|
|
|
av_free(resp);
|
|
|
|
av_free(M);
|
|
|
|
av_free(W);
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
|
|
|
|
|
|
|
impulse[0] = 1.;
|
|
|
|
|
|
|
|
for (int n = 0; n < nb_biquads; n++) {
|
|
|
|
BiquadContext *biquad = &iir->biquads[n];
|
|
|
|
|
|
|
|
biquad_process(n ? y : impulse, y, length,
|
|
|
|
biquad->b[0], biquad->b[1], biquad->b[2],
|
|
|
|
biquad->a[1], biquad->a[2]);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int n = 0; n < nb_biquads; n++) {
|
|
|
|
BiquadContext *biquad = &iir->biquads[n];
|
|
|
|
|
|
|
|
biquad_process(impulse, resp, length - 1,
|
|
|
|
1., 0., 0., biquad->a[1], biquad->a[2]);
|
|
|
|
|
|
|
|
memcpy(M + n * 2 * (length - 1), resp, sizeof(*resp) * (length - 1));
|
|
|
|
memcpy(M + n * 2 * (length - 1) + length, resp, sizeof(*resp) * (length - 2));
|
|
|
|
memset(resp, 0, length * sizeof(*resp));
|
|
|
|
}
|
|
|
|
|
|
|
|
solve(M, &y[1], length - 1, &impulse[1], resp, W);
|
|
|
|
|
|
|
|
iir->fir = y[0];
|
|
|
|
|
|
|
|
for (int n = 0; n < nb_biquads; n++) {
|
|
|
|
BiquadContext *biquad = &iir->biquads[n];
|
|
|
|
|
|
|
|
biquad->b[0] = 0.;
|
|
|
|
biquad->b[1] = resp[n * 2 + 0];
|
|
|
|
biquad->b[2] = resp[n * 2 + 1];
|
|
|
|
}
|
|
|
|
|
|
|
|
av_free(impulse);
|
|
|
|
av_free(y);
|
|
|
|
av_free(resp);
|
|
|
|
av_free(M);
|
|
|
|
av_free(W);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-01-10 21:25:50 +02:00
|
|
|
static void convert_pr2zp(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
int n;
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[0]; n++) {
|
|
|
|
double r = iir->ab[0][2*n];
|
|
|
|
double angle = iir->ab[0][2*n+1];
|
|
|
|
|
|
|
|
iir->ab[0][2*n] = r * cos(angle);
|
|
|
|
iir->ab[0][2*n+1] = r * sin(angle);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[1]; n++) {
|
|
|
|
double r = iir->ab[1][2*n];
|
|
|
|
double angle = iir->ab[1][2*n+1];
|
|
|
|
|
|
|
|
iir->ab[1][2*n] = r * cos(angle);
|
|
|
|
iir->ab[1][2*n+1] = r * sin(angle);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-05-29 22:05:01 +02:00
|
|
|
static void convert_sp2zp(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
int n;
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[0]; n++) {
|
|
|
|
double sr = iir->ab[0][2*n];
|
|
|
|
double si = iir->ab[0][2*n+1];
|
|
|
|
|
2020-10-19 18:34:50 +02:00
|
|
|
iir->ab[0][2*n] = exp(sr) * cos(si);
|
|
|
|
iir->ab[0][2*n+1] = exp(sr) * sin(si);
|
2020-05-29 22:05:01 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[1]; n++) {
|
|
|
|
double sr = iir->ab[1][2*n];
|
|
|
|
double si = iir->ab[1][2*n+1];
|
|
|
|
|
2020-10-19 18:34:50 +02:00
|
|
|
iir->ab[1][2*n] = exp(sr) * cos(si);
|
|
|
|
iir->ab[1][2*n+1] = exp(sr) * sin(si);
|
2020-05-29 22:05:01 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-10-18 18:25:51 +02:00
|
|
|
static double fact(double i)
|
|
|
|
{
|
|
|
|
if (i <= 0.)
|
|
|
|
return 1.;
|
|
|
|
return i * fact(i - 1.);
|
|
|
|
}
|
|
|
|
|
2020-10-19 18:38:43 +02:00
|
|
|
static double coef_sf2zf(double *a, int N, int n)
|
2020-10-18 18:25:51 +02:00
|
|
|
{
|
|
|
|
double z = 0.;
|
|
|
|
|
|
|
|
for (int i = 0; i <= N; i++) {
|
|
|
|
double acc = 0.;
|
|
|
|
|
|
|
|
for (int k = FFMAX(n - N + i, 0); k <= FFMIN(i, n); k++) {
|
|
|
|
acc += ((fact(i) * fact(N - i)) /
|
|
|
|
(fact(k) * fact(i - k) * fact(n - k) * fact(N - i - n + k))) *
|
|
|
|
((k & 1) ? -1. : 1.);;
|
|
|
|
}
|
|
|
|
|
|
|
|
z += a[i] * pow(2., i) * acc;
|
|
|
|
}
|
|
|
|
|
|
|
|
return z;
|
|
|
|
}
|
|
|
|
|
2020-10-19 18:38:43 +02:00
|
|
|
static void convert_sf2tf(AVFilterContext *ctx, int channels)
|
2020-10-18 18:25:51 +02:00
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
double *temp0 = av_calloc(iir->nb_ab[0], sizeof(*temp0));
|
|
|
|
double *temp1 = av_calloc(iir->nb_ab[1], sizeof(*temp1));
|
|
|
|
|
|
|
|
if (!temp0 || !temp1)
|
|
|
|
goto next;
|
|
|
|
|
|
|
|
memcpy(temp0, iir->ab[0], iir->nb_ab[0] * sizeof(*temp0));
|
|
|
|
memcpy(temp1, iir->ab[1], iir->nb_ab[1] * sizeof(*temp1));
|
|
|
|
|
|
|
|
for (int n = 0; n < iir->nb_ab[0]; n++)
|
2020-10-19 18:38:43 +02:00
|
|
|
iir->ab[0][n] = coef_sf2zf(temp0, iir->nb_ab[0] - 1, n);
|
2020-10-18 18:25:51 +02:00
|
|
|
|
|
|
|
for (int n = 0; n < iir->nb_ab[1]; n++)
|
2020-10-19 18:38:43 +02:00
|
|
|
iir->ab[1][n] = coef_sf2zf(temp1, iir->nb_ab[1] - 1, n);
|
2020-10-18 18:25:51 +02:00
|
|
|
|
|
|
|
next:
|
|
|
|
av_free(temp0);
|
|
|
|
av_free(temp1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-01-10 21:25:50 +02:00
|
|
|
static void convert_pd2zp(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
int n;
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[0]; n++) {
|
|
|
|
double r = iir->ab[0][2*n];
|
|
|
|
double angle = M_PI*iir->ab[0][2*n+1]/180.;
|
|
|
|
|
|
|
|
iir->ab[0][2*n] = r * cos(angle);
|
|
|
|
iir->ab[0][2*n+1] = r * sin(angle);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (n = 0; n < iir->nb_ab[1]; n++) {
|
|
|
|
double r = iir->ab[1][2*n];
|
|
|
|
double angle = M_PI*iir->ab[1][2*n+1]/180.;
|
|
|
|
|
|
|
|
iir->ab[1][2*n] = r * cos(angle);
|
|
|
|
iir->ab[1][2*n+1] = r * sin(angle);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-11-22 13:51:48 +02:00
|
|
|
static void check_stability(AVFilterContext *ctx, int channels)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
|
|
|
for (ch = 0; ch < channels; ch++) {
|
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
|
|
|
|
for (int n = 0; n < iir->nb_ab[0]; n++) {
|
|
|
|
double pr = hypot(iir->ab[0][2*n], iir->ab[0][2*n+1]);
|
|
|
|
|
|
|
|
if (pr >= 1.) {
|
|
|
|
av_log(ctx, AV_LOG_WARNING, "pole %d at channel %d is unstable\n", n, ch);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color)
|
|
|
|
{
|
|
|
|
const uint8_t *font;
|
|
|
|
int font_height;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
font = avpriv_cga_font, font_height = 8;
|
|
|
|
|
|
|
|
for (i = 0; txt[i]; i++) {
|
|
|
|
int char_y, mask;
|
|
|
|
|
|
|
|
uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
|
|
|
|
for (char_y = 0; char_y < font_height; char_y++) {
|
|
|
|
for (mask = 0x80; mask; mask >>= 1) {
|
|
|
|
if (font[txt[i] * font_height + char_y] & mask)
|
|
|
|
AV_WL32(p, color);
|
|
|
|
p += 4;
|
|
|
|
}
|
|
|
|
p += pic->linesize[0] - 8 * 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void draw_line(AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color)
|
|
|
|
{
|
2018-07-19 02:28:25 +02:00
|
|
|
int dx = FFABS(x1-x0);
|
2018-05-30 12:43:09 +02:00
|
|
|
int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
|
|
|
|
int err = (dx>dy ? dx : -dy) / 2, e2;
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
AV_WL32(out->data[0] + y0 * out->linesize[0] + x0 * 4, color);
|
|
|
|
|
|
|
|
if (x0 == x1 && y0 == y1)
|
|
|
|
break;
|
|
|
|
|
|
|
|
e2 = err;
|
|
|
|
|
|
|
|
if (e2 >-dx) {
|
|
|
|
err -= dy;
|
2018-07-19 02:28:25 +02:00
|
|
|
x0--;
|
2018-05-30 12:43:09 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (e2 < dy) {
|
|
|
|
err += dx;
|
|
|
|
y0 += sy;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
static double distance(double x0, double x1, double y0, double y1)
|
|
|
|
{
|
|
|
|
return hypot(x0 - x1, y0 - y1);
|
|
|
|
}
|
|
|
|
|
2019-11-22 17:04:13 +02:00
|
|
|
static void get_response(int channel, int format, double w,
|
|
|
|
const double *b, const double *a,
|
2020-05-30 09:47:12 +02:00
|
|
|
int nb_b, int nb_a, double *magnitude, double *phase)
|
2019-11-22 17:04:13 +02:00
|
|
|
{
|
|
|
|
double realz, realp;
|
|
|
|
double imagz, imagp;
|
|
|
|
double real, imag;
|
|
|
|
double div;
|
|
|
|
|
|
|
|
if (format == 0) {
|
|
|
|
realz = 0., realp = 0.;
|
|
|
|
imagz = 0., imagp = 0.;
|
|
|
|
for (int x = 0; x < nb_a; x++) {
|
|
|
|
realz += cos(-x * w) * a[x];
|
|
|
|
imagz += sin(-x * w) * a[x];
|
|
|
|
}
|
|
|
|
|
|
|
|
for (int x = 0; x < nb_b; x++) {
|
|
|
|
realp += cos(-x * w) * b[x];
|
|
|
|
imagp += sin(-x * w) * b[x];
|
|
|
|
}
|
|
|
|
|
|
|
|
div = realp * realp + imagp * imagp;
|
|
|
|
real = (realz * realp + imagz * imagp) / div;
|
|
|
|
imag = (imagz * realp - imagp * realz) / div;
|
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
*magnitude = hypot(real, imag);
|
|
|
|
*phase = atan2(imag, real);
|
|
|
|
} else {
|
|
|
|
double p = 1., z = 1.;
|
|
|
|
double acc = 0.;
|
2019-11-22 17:04:13 +02:00
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
for (int x = 0; x < nb_a; x++) {
|
|
|
|
z *= distance(cos(w), a[2 * x], sin(w), a[2 * x + 1]);
|
|
|
|
acc += atan2(sin(w) - a[2 * x + 1], cos(w) - a[2 * x]);
|
2019-11-22 17:04:13 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
for (int x = 0; x < nb_b; x++) {
|
2020-05-30 09:47:12 +02:00
|
|
|
p *= distance(cos(w), b[2 * x], sin(w), b[2 * x + 1]);
|
|
|
|
acc -= atan2(sin(w) - b[2 * x + 1], cos(w) - b[2 * x]);
|
2019-11-22 17:04:13 +02:00
|
|
|
}
|
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
*magnitude = z / p;
|
|
|
|
*phase = acc;
|
|
|
|
}
|
2019-11-22 17:04:13 +02:00
|
|
|
}
|
|
|
|
|
2020-05-20 11:01:56 +02:00
|
|
|
static void draw_response(AVFilterContext *ctx, AVFrame *out, int sample_rate)
|
2018-05-30 12:43:09 +02:00
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
2020-05-20 11:01:56 +02:00
|
|
|
double *mag, *phase, *temp, *delay, min = DBL_MAX, max = -DBL_MAX;
|
2020-05-21 10:50:58 +02:00
|
|
|
double min_delay = DBL_MAX, max_delay = -DBL_MAX, min_phase, max_phase;
|
2019-07-13 15:43:17 +02:00
|
|
|
int prev_ymag = -1, prev_yphase = -1, prev_ydelay = -1;
|
2018-05-30 12:43:09 +02:00
|
|
|
char text[32];
|
2019-11-22 17:04:13 +02:00
|
|
|
int ch, i;
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
memset(out->data[0], 0, s->h * out->linesize[0]);
|
|
|
|
|
|
|
|
phase = av_malloc_array(s->w, sizeof(*phase));
|
2020-05-20 11:01:56 +02:00
|
|
|
temp = av_malloc_array(s->w, sizeof(*temp));
|
2018-05-30 12:43:09 +02:00
|
|
|
mag = av_malloc_array(s->w, sizeof(*mag));
|
2019-07-13 15:43:17 +02:00
|
|
|
delay = av_malloc_array(s->w, sizeof(*delay));
|
2020-05-20 11:01:56 +02:00
|
|
|
if (!mag || !phase || !delay || !temp)
|
2018-05-30 12:43:09 +02:00
|
|
|
goto end;
|
|
|
|
|
|
|
|
ch = av_clip(s->ir_channel, 0, s->channels - 1);
|
|
|
|
for (i = 0; i < s->w; i++) {
|
|
|
|
const double *b = s->iir[ch].ab[0];
|
|
|
|
const double *a = s->iir[ch].ab[1];
|
2019-11-22 17:04:13 +02:00
|
|
|
const int nb_b = s->iir[ch].nb_ab[0];
|
|
|
|
const int nb_a = s->iir[ch].nb_ab[1];
|
2018-05-30 12:43:09 +02:00
|
|
|
double w = i * M_PI / (s->w - 1);
|
2020-05-30 09:47:12 +02:00
|
|
|
double m, p;
|
2018-05-30 12:43:09 +02:00
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
get_response(ch, s->format, w, b, a, nb_b, nb_a, &m, &p);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
2020-05-30 09:47:12 +02:00
|
|
|
mag[i] = s->iir[ch].g * m;
|
|
|
|
phase[i] = p;
|
2020-05-20 11:01:56 +02:00
|
|
|
min = fmin(min, mag[i]);
|
|
|
|
max = fmax(max, mag[i]);
|
2018-05-30 12:43:09 +02:00
|
|
|
}
|
|
|
|
|
2020-05-20 11:01:56 +02:00
|
|
|
temp[0] = 0.;
|
2019-07-13 15:43:17 +02:00
|
|
|
for (i = 0; i < s->w - 1; i++) {
|
2020-05-20 11:01:56 +02:00
|
|
|
double d = phase[i] - phase[i + 1];
|
|
|
|
temp[i + 1] = ceil(fabs(d) / (2. * M_PI)) * 2. * M_PI * ((d > M_PI) - (d < -M_PI));
|
|
|
|
}
|
2019-07-13 15:43:17 +02:00
|
|
|
|
2020-05-20 11:01:56 +02:00
|
|
|
min_phase = phase[0];
|
|
|
|
max_phase = phase[0];
|
|
|
|
for (i = 1; i < s->w; i++) {
|
|
|
|
temp[i] += temp[i - 1];
|
|
|
|
phase[i] += temp[i];
|
|
|
|
min_phase = fmin(min_phase, phase[i]);
|
|
|
|
max_phase = fmax(max_phase, phase[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < s->w - 1; i++) {
|
|
|
|
double div = s->w / (double)sample_rate;
|
|
|
|
|
|
|
|
delay[i + 1] = -(phase[i] - phase[i + 1]) / div;
|
|
|
|
min_delay = fmin(min_delay, delay[i + 1]);
|
|
|
|
max_delay = fmax(max_delay, delay[i + 1]);
|
2019-07-13 15:43:17 +02:00
|
|
|
}
|
2020-05-21 10:50:58 +02:00
|
|
|
delay[0] = delay[1];
|
2019-07-13 15:43:17 +02:00
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
for (i = 0; i < s->w; i++) {
|
|
|
|
int ymag = mag[i] / max * (s->h - 1);
|
2019-07-13 15:43:17 +02:00
|
|
|
int ydelay = (delay[i] - min_delay) / (max_delay - min_delay) * (s->h - 1);
|
2020-05-20 11:01:56 +02:00
|
|
|
int yphase = (phase[i] - min_phase) / (max_phase - min_phase) * (s->h - 1);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
ymag = s->h - 1 - av_clip(ymag, 0, s->h - 1);
|
|
|
|
yphase = s->h - 1 - av_clip(yphase, 0, s->h - 1);
|
2019-07-13 15:43:17 +02:00
|
|
|
ydelay = s->h - 1 - av_clip(ydelay, 0, s->h - 1);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
if (prev_ymag < 0)
|
|
|
|
prev_ymag = ymag;
|
|
|
|
if (prev_yphase < 0)
|
|
|
|
prev_yphase = yphase;
|
2019-07-13 15:43:17 +02:00
|
|
|
if (prev_ydelay < 0)
|
|
|
|
prev_ydelay = ydelay;
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
draw_line(out, i, ymag, FFMAX(i - 1, 0), prev_ymag, 0xFFFF00FF);
|
|
|
|
draw_line(out, i, yphase, FFMAX(i - 1, 0), prev_yphase, 0xFF00FF00);
|
2019-07-13 15:43:17 +02:00
|
|
|
draw_line(out, i, ydelay, FFMAX(i - 1, 0), prev_ydelay, 0xFF00FFFF);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
prev_ymag = ymag;
|
|
|
|
prev_yphase = yphase;
|
2019-07-13 15:43:17 +02:00
|
|
|
prev_ydelay = ydelay;
|
2018-05-30 12:43:09 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (s->w > 400 && s->h > 100) {
|
|
|
|
drawtext(out, 2, 2, "Max Magnitude:", 0xDDDDDDDD);
|
|
|
|
snprintf(text, sizeof(text), "%.2f", max);
|
|
|
|
drawtext(out, 15 * 8 + 2, 2, text, 0xDDDDDDDD);
|
|
|
|
|
|
|
|
drawtext(out, 2, 12, "Min Magnitude:", 0xDDDDDDDD);
|
|
|
|
snprintf(text, sizeof(text), "%.2f", min);
|
|
|
|
drawtext(out, 15 * 8 + 2, 12, text, 0xDDDDDDDD);
|
2019-07-13 15:43:17 +02:00
|
|
|
|
2020-05-20 11:01:56 +02:00
|
|
|
drawtext(out, 2, 22, "Max Phase:", 0xDDDDDDDD);
|
|
|
|
snprintf(text, sizeof(text), "%.2f", max_phase);
|
|
|
|
drawtext(out, 15 * 8 + 2, 22, text, 0xDDDDDDDD);
|
|
|
|
|
|
|
|
drawtext(out, 2, 32, "Min Phase:", 0xDDDDDDDD);
|
|
|
|
snprintf(text, sizeof(text), "%.2f", min_phase);
|
|
|
|
drawtext(out, 15 * 8 + 2, 32, text, 0xDDDDDDDD);
|
|
|
|
|
|
|
|
drawtext(out, 2, 42, "Max Delay:", 0xDDDDDDDD);
|
2019-07-13 15:43:17 +02:00
|
|
|
snprintf(text, sizeof(text), "%.2f", max_delay);
|
2020-05-20 11:01:56 +02:00
|
|
|
drawtext(out, 11 * 8 + 2, 42, text, 0xDDDDDDDD);
|
2019-07-13 15:43:17 +02:00
|
|
|
|
2020-05-20 11:01:56 +02:00
|
|
|
drawtext(out, 2, 52, "Min Delay:", 0xDDDDDDDD);
|
2019-07-13 15:43:17 +02:00
|
|
|
snprintf(text, sizeof(text), "%.2f", min_delay);
|
2020-05-20 11:01:56 +02:00
|
|
|
drawtext(out, 11 * 8 + 2, 52, text, 0xDDDDDDDD);
|
2018-05-30 12:43:09 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
2019-07-13 15:43:17 +02:00
|
|
|
av_free(delay);
|
2020-05-20 11:01:56 +02:00
|
|
|
av_free(temp);
|
2018-05-30 12:43:09 +02:00
|
|
|
av_free(phase);
|
|
|
|
av_free(mag);
|
|
|
|
}
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = outlink->src;
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
int ch, ret, i;
|
|
|
|
|
|
|
|
s->channels = inlink->channels;
|
2018-01-09 18:46:27 +02:00
|
|
|
s->iir = av_calloc(s->channels, sizeof(*s->iir));
|
|
|
|
if (!s->iir)
|
2018-01-02 15:30:54 +02:00
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = read_gains(ctx, s->g_str, inlink->channels);
|
2018-01-07 22:16:25 +02:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = read_channels(ctx, inlink->channels, s->a_str, 0);
|
2018-01-02 15:30:54 +02:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
ret = read_channels(ctx, inlink->channels, s->b_str, 1);
|
2018-01-02 15:30:54 +02:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2020-10-18 18:25:51 +02:00
|
|
|
if (s->format == -1) {
|
2020-10-19 18:38:43 +02:00
|
|
|
convert_sf2tf(ctx, inlink->channels);
|
2020-10-18 18:25:51 +02:00
|
|
|
s->format = 0;
|
|
|
|
} else if (s->format == 2) {
|
2018-01-10 21:25:50 +02:00
|
|
|
convert_pr2zp(ctx, inlink->channels);
|
|
|
|
} else if (s->format == 3) {
|
|
|
|
convert_pd2zp(ctx, inlink->channels);
|
2020-05-29 22:05:01 +02:00
|
|
|
} else if (s->format == 4) {
|
|
|
|
convert_sp2zp(ctx, inlink->channels);
|
2018-01-10 21:25:50 +02:00
|
|
|
}
|
2019-11-22 13:51:48 +02:00
|
|
|
if (s->format > 0) {
|
|
|
|
check_stability(ctx, inlink->channels);
|
|
|
|
}
|
2018-01-10 21:25:50 +02:00
|
|
|
|
2020-05-30 09:50:59 +02:00
|
|
|
av_frame_free(&s->video);
|
|
|
|
if (s->response) {
|
|
|
|
s->video = ff_get_video_buffer(ctx->outputs[1], s->w, s->h);
|
|
|
|
if (!s->video)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
draw_response(ctx, s->video, inlink->sample_rate);
|
|
|
|
}
|
|
|
|
|
2018-01-09 13:55:49 +02:00
|
|
|
if (s->format == 0)
|
2020-10-18 18:25:51 +02:00
|
|
|
av_log(ctx, AV_LOG_WARNING, "transfer function coefficients format is not recommended for too high number of zeros/poles.\n");
|
2018-01-09 13:55:49 +02:00
|
|
|
|
2018-01-10 21:25:50 +02:00
|
|
|
if (s->format > 0 && s->process == 0) {
|
2018-01-09 13:55:49 +02:00
|
|
|
av_log(ctx, AV_LOG_WARNING, "Direct processsing is not recommended for zp coefficients format.\n");
|
|
|
|
|
2018-01-07 10:43:50 +02:00
|
|
|
ret = convert_zp2tf(ctx, inlink->channels);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2020-10-18 18:25:51 +02:00
|
|
|
} else if (s->format <= 0 && s->process == 1) {
|
2020-10-15 17:29:04 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Serial processing is not implemented for transfer function.\n");
|
|
|
|
return AVERROR_PATCHWELCOME;
|
2020-10-18 18:25:51 +02:00
|
|
|
} else if (s->format <= 0 && s->process == 2) {
|
2020-10-15 17:29:04 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Parallel processing is not implemented for transfer function.\n");
|
2018-01-08 22:14:23 +02:00
|
|
|
return AVERROR_PATCHWELCOME;
|
2018-01-10 21:25:50 +02:00
|
|
|
} else if (s->format > 0 && s->process == 1) {
|
2018-01-08 22:14:23 +02:00
|
|
|
ret = decompose_zp2biquads(ctx, inlink->channels);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2020-10-15 17:29:04 +02:00
|
|
|
} else if (s->format > 0 && s->process == 2) {
|
2020-10-17 18:23:35 +02:00
|
|
|
if (s->precision > 1)
|
|
|
|
av_log(ctx, AV_LOG_WARNING, "Parallel processing is not recommended for fixed-point precisions.\n");
|
2020-10-15 17:29:04 +02:00
|
|
|
ret = decompose_zp2biquads(ctx, inlink->channels);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
ret = convert_serial2parallel(ctx, inlink->channels);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2018-01-07 10:43:50 +02:00
|
|
|
}
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
for (ch = 0; s->format == 0 && ch < inlink->channels; ch++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
|
|
|
|
for (i = 1; i < iir->nb_ab[0]; i++) {
|
|
|
|
iir->ab[0][i] /= iir->ab[0][0];
|
2018-01-02 15:30:54 +02:00
|
|
|
}
|
|
|
|
|
2020-05-22 14:12:06 +02:00
|
|
|
iir->ab[0][0] = 1.0;
|
2018-01-09 18:46:27 +02:00
|
|
|
for (i = 0; i < iir->nb_ab[1]; i++) {
|
2020-05-22 14:12:06 +02:00
|
|
|
iir->ab[1][i] *= iir->g;
|
2018-01-02 15:30:54 +02:00
|
|
|
}
|
2020-05-22 12:28:03 +02:00
|
|
|
|
|
|
|
normalize_coeffs(ctx, ch);
|
2018-01-02 15:30:54 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
switch (inlink->format) {
|
2020-10-15 17:29:04 +02:00
|
|
|
case AV_SAMPLE_FMT_DBLP: s->iir_channel = s->process == 2 ? iir_ch_parallel_dblp : s->process == 1 ? iir_ch_serial_dblp : iir_ch_dblp; break;
|
|
|
|
case AV_SAMPLE_FMT_FLTP: s->iir_channel = s->process == 2 ? iir_ch_parallel_fltp : s->process == 1 ? iir_ch_serial_fltp : iir_ch_fltp; break;
|
|
|
|
case AV_SAMPLE_FMT_S32P: s->iir_channel = s->process == 2 ? iir_ch_parallel_s32p : s->process == 1 ? iir_ch_serial_s32p : iir_ch_s32p; break;
|
|
|
|
case AV_SAMPLE_FMT_S16P: s->iir_channel = s->process == 2 ? iir_ch_parallel_s16p : s->process == 1 ? iir_ch_serial_s16p : iir_ch_s16p; break;
|
2018-01-02 15:30:54 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = inlink->dst;
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
2018-01-09 11:32:14 +02:00
|
|
|
ThreadData td;
|
2018-01-02 15:30:54 +02:00
|
|
|
AVFrame *out;
|
2018-05-30 12:43:09 +02:00
|
|
|
int ch, ret;
|
2018-01-02 15:30:54 +02:00
|
|
|
|
2020-10-15 17:29:04 +02:00
|
|
|
if (av_frame_is_writable(in) && s->process != 2) {
|
2018-01-02 15:30:54 +02:00
|
|
|
out = in;
|
|
|
|
} else {
|
|
|
|
out = ff_get_audio_buffer(outlink, in->nb_samples);
|
|
|
|
if (!out) {
|
|
|
|
av_frame_free(&in);
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
|
|
|
av_frame_copy_props(out, in);
|
|
|
|
}
|
|
|
|
|
2018-01-09 11:32:14 +02:00
|
|
|
td.in = in;
|
|
|
|
td.out = out;
|
|
|
|
ctx->internal->execute(ctx, s->iir_channel, &td, NULL, outlink->channels);
|
2018-01-02 15:30:54 +02:00
|
|
|
|
2018-01-09 11:32:14 +02:00
|
|
|
for (ch = 0; ch < outlink->channels; ch++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
if (s->iir[ch].clippings > 0)
|
|
|
|
av_log(ctx, AV_LOG_WARNING, "Channel %d clipping %d times. Please reduce gain.\n",
|
|
|
|
ch, s->iir[ch].clippings);
|
|
|
|
s->iir[ch].clippings = 0;
|
2018-01-09 11:32:14 +02:00
|
|
|
}
|
2018-01-02 15:30:54 +02:00
|
|
|
|
|
|
|
if (in != out)
|
|
|
|
av_frame_free(&in);
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
if (s->response) {
|
|
|
|
AVFilterLink *outlink = ctx->outputs[1];
|
2018-11-08 13:51:12 +02:00
|
|
|
int64_t old_pts = s->video->pts;
|
|
|
|
int64_t new_pts = av_rescale_q(out->pts, ctx->inputs[0]->time_base, outlink->time_base);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
2018-11-08 13:51:12 +02:00
|
|
|
if (new_pts > old_pts) {
|
2020-01-14 17:11:45 +02:00
|
|
|
AVFrame *clone;
|
|
|
|
|
2018-11-08 13:51:12 +02:00
|
|
|
s->video->pts = new_pts;
|
2020-01-14 17:11:45 +02:00
|
|
|
clone = av_frame_clone(s->video);
|
|
|
|
if (!clone)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = ff_filter_frame(outlink, clone);
|
2018-11-08 13:51:12 +02:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
2018-05-30 12:43:09 +02:00
|
|
|
}
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
return ff_filter_frame(outlink, out);
|
|
|
|
}
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
static int config_video(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = outlink->src;
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
|
|
|
|
outlink->sample_aspect_ratio = (AVRational){1,1};
|
|
|
|
outlink->w = s->w;
|
|
|
|
outlink->h = s->h;
|
2018-11-08 13:51:12 +02:00
|
|
|
outlink->frame_rate = s->rate;
|
|
|
|
outlink->time_base = av_inv_q(outlink->frame_rate);
|
2018-05-30 12:43:09 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-01-05 20:55:09 +02:00
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
2018-05-30 12:43:09 +02:00
|
|
|
AVFilterPad pad, vpad;
|
|
|
|
int ret;
|
2018-01-05 20:55:09 +02:00
|
|
|
|
2018-01-07 22:16:25 +02:00
|
|
|
if (!s->a_str || !s->b_str || !s->g_str) {
|
2018-01-05 20:55:09 +02:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Valid coefficients are mandatory.\n");
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
|
2018-01-08 22:14:23 +02:00
|
|
|
switch (s->precision) {
|
|
|
|
case 0: s->sample_format = AV_SAMPLE_FMT_DBLP; break;
|
|
|
|
case 1: s->sample_format = AV_SAMPLE_FMT_FLTP; break;
|
|
|
|
case 2: s->sample_format = AV_SAMPLE_FMT_S32P; break;
|
|
|
|
case 3: s->sample_format = AV_SAMPLE_FMT_S16P; break;
|
|
|
|
default: return AVERROR_BUG;
|
|
|
|
}
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
pad = (AVFilterPad){
|
2020-08-22 04:47:14 +02:00
|
|
|
.name = "default",
|
2018-05-30 12:43:09 +02:00
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
|
|
.config_props = config_output,
|
|
|
|
};
|
|
|
|
|
2020-05-25 10:10:29 +02:00
|
|
|
ret = ff_insert_outpad(ctx, 0, &pad);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2018-05-30 12:43:09 +02:00
|
|
|
if (s->response) {
|
|
|
|
vpad = (AVFilterPad){
|
2020-08-22 04:47:14 +02:00
|
|
|
.name = "filter_response",
|
2018-05-30 12:43:09 +02:00
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.config_props = config_video,
|
|
|
|
};
|
|
|
|
|
|
|
|
ret = ff_insert_outpad(ctx, 1, &vpad);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2018-01-05 20:55:09 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-01-02 15:30:54 +02:00
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
AudioIIRContext *s = ctx->priv;
|
|
|
|
int ch;
|
|
|
|
|
2018-01-09 18:46:27 +02:00
|
|
|
if (s->iir) {
|
2018-01-02 15:30:54 +02:00
|
|
|
for (ch = 0; ch < s->channels; ch++) {
|
2018-01-09 18:46:27 +02:00
|
|
|
IIRChannel *iir = &s->iir[ch];
|
|
|
|
av_freep(&iir->ab[0]);
|
|
|
|
av_freep(&iir->ab[1]);
|
|
|
|
av_freep(&iir->cache[0]);
|
|
|
|
av_freep(&iir->cache[1]);
|
|
|
|
av_freep(&iir->biquads);
|
2018-01-02 15:30:54 +02:00
|
|
|
}
|
|
|
|
}
|
2018-01-09 18:46:27 +02:00
|
|
|
av_freep(&s->iir);
|
2018-05-30 12:43:09 +02:00
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av_frame_free(&s->video);
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2018-01-02 15:30:54 +02:00
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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#define OFFSET(x) offsetof(AudioIIRContext, x)
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#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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2018-05-30 12:43:09 +02:00
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#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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2018-01-02 15:30:54 +02:00
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static const AVOption aiir_options[] = {
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2020-05-22 12:37:17 +02:00
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{ "zeros", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
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2018-01-09 13:55:49 +02:00
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{ "z", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
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2020-05-22 12:37:17 +02:00
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{ "poles", "set A/denominator/poles coefficients", OFFSET(a_str),AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
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2018-01-09 13:55:49 +02:00
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{ "p", "set A/denominator/poles coefficients", OFFSET(a_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
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2020-05-22 12:37:17 +02:00
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{ "gains", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF },
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2018-01-07 22:16:25 +02:00
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{ "k", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF },
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2018-01-02 15:30:54 +02:00
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{ "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
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{ "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
|
2020-10-18 18:25:51 +02:00
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{ "format", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, -1, 4, AF, "format" },
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{ "f", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, -1, 4, AF, "format" },
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{ "sf", "analog transfer function", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "format" },
|
2020-05-29 20:44:41 +02:00
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{ "tf", "digital transfer function", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "format" },
|
2018-01-07 10:43:50 +02:00
|
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{ "zp", "Z-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "format" },
|
2018-01-10 21:25:50 +02:00
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{ "pr", "Z-plane zeros/poles (polar radians)", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "format" },
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{ "pd", "Z-plane zeros/poles (polar degrees)", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "format" },
|
2020-05-29 22:05:01 +02:00
|
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|
{ "sp", "S-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, AF, "format" },
|
2020-10-15 17:29:04 +02:00
|
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|
{ "process", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 2, AF, "process" },
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{ "r", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 2, AF, "process" },
|
2018-01-08 22:14:23 +02:00
|
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|
{ "d", "direct", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "process" },
|
2020-10-15 17:29:04 +02:00
|
|
|
{ "s", "serial", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "process" },
|
|
|
|
{ "p", "parallel", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "process" },
|
2020-05-22 12:37:17 +02:00
|
|
|
{ "precision", "set filtering precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" },
|
2018-01-08 22:14:23 +02:00
|
|
|
{ "e", "set precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" },
|
|
|
|
{ "dbl", "double-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" },
|
|
|
|
{ "flt", "single-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" },
|
|
|
|
{ "i32", "32-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" },
|
|
|
|
{ "i16", "16-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "precision" },
|
2020-05-22 12:37:17 +02:00
|
|
|
{ "normalize", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF },
|
2020-05-22 12:28:03 +02:00
|
|
|
{ "n", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF },
|
2019-07-08 16:44:53 +02:00
|
|
|
{ "mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
|
2018-05-30 12:43:09 +02:00
|
|
|
{ "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
|
|
|
|
{ "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
|
|
|
|
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF },
|
2018-11-08 13:51:12 +02:00
|
|
|
{ "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT32_MAX, VF },
|
2018-01-02 15:30:54 +02:00
|
|
|
{ NULL },
|
|
|
|
};
|
|
|
|
|
|
|
|
AVFILTER_DEFINE_CLASS(aiir);
|
|
|
|
|
|
|
|
AVFilter ff_af_aiir = {
|
|
|
|
.name = "aiir",
|
|
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Infinite Impulse Response filter with supplied coefficients."),
|
|
|
|
.priv_size = sizeof(AudioIIRContext),
|
2018-01-09 11:32:14 +02:00
|
|
|
.priv_class = &aiir_class,
|
2018-01-05 20:55:09 +02:00
|
|
|
.init = init,
|
2018-01-02 15:30:54 +02:00
|
|
|
.uninit = uninit,
|
|
|
|
.query_formats = query_formats,
|
|
|
|
.inputs = inputs,
|
2018-05-30 12:43:09 +02:00
|
|
|
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS |
|
|
|
|
AVFILTER_FLAG_SLICE_THREADS,
|
2018-01-02 15:30:54 +02:00
|
|
|
};
|