mirror of
https://github.com/FFmpeg/FFmpeg.git
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1675 lines
71 KiB
C
1675 lines
71 KiB
C
/*
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* Copyright (c) 2013 Paul B Mahol
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* Copyright (c) 2006-2008 Rob Sykes <robs@users.sourceforge.net>
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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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/*
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* 2-pole filters designed by Robert Bristow-Johnson <rbj@audioimagination.com>
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* see http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt
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*
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* 1-pole filters based on code (c) 2000 Chris Bagwell <cbagwell@sprynet.com>
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* Algorithms: Recursive single pole low/high pass filter
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* Reference: The Scientist and Engineer's Guide to Digital Signal Processing
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*
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* low-pass: output[N] = input[N] * A + output[N-1] * B
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* X = exp(-2.0 * pi * Fc)
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* A = 1 - X
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* B = X
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* Fc = cutoff freq / sample rate
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*
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* Mimics an RC low-pass filter:
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*
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* ---/\/\/\/\----------->
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* |
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* --- C
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* ---
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* |
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* |
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* V
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*
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* high-pass: output[N] = A0 * input[N] + A1 * input[N-1] + B1 * output[N-1]
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* X = exp(-2.0 * pi * Fc)
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* A0 = (1 + X) / 2
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* A1 = -(1 + X) / 2
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* B1 = X
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* Fc = cutoff freq / sample rate
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*
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* Mimics an RC high-pass filter:
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*
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* || C
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* ----||--------->
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* || |
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* <
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* > R
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* <
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* |
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* V
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*/
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#include "config_components.h"
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/ffmath.h"
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#include "libavutil/opt.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "internal.h"
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enum FilterType {
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biquad,
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equalizer,
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bass,
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treble,
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bandpass,
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bandreject,
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allpass,
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highpass,
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lowpass,
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lowshelf,
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highshelf,
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tiltshelf,
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};
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enum WidthType {
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NONE,
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HERTZ,
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OCTAVE,
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QFACTOR,
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SLOPE,
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KHERTZ,
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NB_WTYPE,
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};
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enum TransformType {
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DI,
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DII,
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TDI,
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TDII,
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LATT,
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SVF,
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ZDF,
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NB_TTYPE,
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};
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typedef struct ChanCache {
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double i1, i2;
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double o1, o2;
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double ri1, ri2;
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double ro1, ro2;
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int clippings;
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} ChanCache;
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typedef struct BiquadsContext {
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const AVClass *class;
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enum FilterType filter_type;
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int width_type;
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int poles;
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int csg;
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int transform_type;
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int precision;
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int block_samples;
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int bypass;
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double gain;
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double frequency;
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double width;
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double mix;
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char *ch_layout_str;
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AVChannelLayout ch_layout;
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int normalize;
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int order;
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double a0, a1, a2;
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double b0, b1, b2;
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double oa0, oa1, oa2;
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double ob0, ob1, ob2;
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AVFrame *block[3];
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ChanCache *cache;
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int block_align;
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int64_t pts;
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int nb_samples;
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void (*filter)(struct BiquadsContext *s, const void *ibuf, void *obuf, int len,
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double *i1, double *i2, double *o1, double *o2,
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double b0, double b1, double b2, double a0, double a1, double a2, int *clippings,
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int disabled);
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} BiquadsContext;
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static int query_formats(AVFilterContext *ctx)
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{
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BiquadsContext *s = ctx->priv;
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static const enum AVSampleFormat auto_sample_fmts[] = {
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AV_SAMPLE_FMT_S16P,
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AV_SAMPLE_FMT_S32P,
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AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_DBLP,
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AV_SAMPLE_FMT_NONE
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};
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enum AVSampleFormat sample_fmts[] = {
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AV_SAMPLE_FMT_S16P,
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AV_SAMPLE_FMT_NONE
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};
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const enum AVSampleFormat *sample_fmts_list = sample_fmts;
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int ret = ff_set_common_all_channel_counts(ctx);
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if (ret < 0)
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return ret;
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switch (s->precision) {
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case 0:
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sample_fmts[0] = AV_SAMPLE_FMT_S16P;
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break;
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case 1:
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sample_fmts[0] = AV_SAMPLE_FMT_S32P;
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break;
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case 2:
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sample_fmts[0] = AV_SAMPLE_FMT_FLTP;
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break;
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case 3:
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sample_fmts[0] = AV_SAMPLE_FMT_DBLP;
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break;
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default:
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sample_fmts_list = auto_sample_fmts;
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break;
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}
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ret = ff_set_common_formats_from_list(ctx, sample_fmts_list);
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if (ret < 0)
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return ret;
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return ff_set_common_all_samplerates(ctx);
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}
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#define BIQUAD_FILTER(name, type, min, max, need_clipping) \
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static void biquad_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *in1, double *in2, \
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double *out1, double *out2, \
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double b0, double b1, double b2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double i1 = *in1; \
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double i2 = *in2; \
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double o1 = *out1; \
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double o2 = *out2; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double out; \
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int i; \
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a1 = -a1; \
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a2 = -a2; \
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\
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for (i = 0; i+1 < len; i++) { \
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o2 = i2 * b2 + i1 * b1 + ibuf[i] * b0 + o2 * a2 + o1 * a1; \
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i2 = ibuf[i]; \
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out = o2 * wet + i2 * dry; \
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if (disabled) { \
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obuf[i] = i2; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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i++; \
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o1 = i1 * b2 + i2 * b1 + ibuf[i] * b0 + o1 * a2 + o2 * a1; \
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i1 = ibuf[i]; \
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out = o1 * wet + i1 * dry; \
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if (disabled) { \
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obuf[i] = i1; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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if (i < len) { \
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double o0 = ibuf[i] * b0 + i1 * b1 + i2 * b2 + o1 * a1 + o2 * a2; \
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i2 = i1; \
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i1 = ibuf[i]; \
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o2 = o1; \
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o1 = o0; \
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out = o0 * wet + i1 * dry; \
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if (disabled) { \
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obuf[i] = i1; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*in1 = i1; \
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*in2 = i2; \
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*out1 = o1; \
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*out2 = o2; \
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}
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BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_FILTER(flt, float, -1., 1., 0)
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BIQUAD_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_DII_FILTER(name, type, min, max, need_clipping) \
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static void biquad_dii_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *z1, double *z2, \
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double *unused1, double *unused2, \
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double b0, double b1, double b2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double w1 = *z1; \
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double w2 = *z2; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double in, out, w0; \
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\
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a1 = -a1; \
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a2 = -a2; \
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\
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for (int i = 0; i < len; i++) { \
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in = ibuf[i]; \
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w0 = in + a1 * w1 + a2 * w2; \
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out = b0 * w0 + b1 * w1 + b2 * w2; \
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w2 = w1; \
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w1 = w0; \
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*z1 = w1; \
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*z2 = w2; \
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}
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BIQUAD_DII_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_DII_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_DII_FILTER(flt, float, -1., 1., 0)
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BIQUAD_DII_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_TDI_FILTER(name, type, min, max, need_clipping) \
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static void biquad_tdi_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *z1, double *z2, \
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double *z3, double *z4, \
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double b0, double b1, double b2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double s1 = *z1; \
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double s2 = *z2; \
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double s3 = *z3; \
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double s4 = *z4; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double in, out; \
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\
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a1 = -a1; \
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a2 = -a2; \
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\
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for (int i = 0; i < len; i++) { \
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double t1, t2, t3, t4; \
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in = ibuf[i] + s1; \
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t1 = in * a1 + s2; \
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t2 = in * a2; \
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t3 = in * b1 + s4; \
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t4 = in * b2; \
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out = b0 * in + s3; \
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out = out * wet + in * dry; \
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s1 = t1; s2 = t2; s3 = t3; s4 = t4; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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\
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*z1 = s1; \
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*z2 = s2; \
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*z3 = s3; \
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*z4 = s4; \
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}
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BIQUAD_TDI_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_TDI_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_TDI_FILTER(flt, float, -1., 1., 0)
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BIQUAD_TDI_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_TDII_FILTER(name, type, min, max, need_clipping) \
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static void biquad_tdii_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *z1, double *z2, \
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double *unused1, double *unused2, \
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double b0, double b1, double b2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double w1 = *z1; \
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double w2 = *z2; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double in, out; \
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\
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a1 = -a1; \
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a2 = -a2; \
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\
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for (int i = 0; i < len; i++) { \
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in = ibuf[i]; \
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out = b0 * in + w1; \
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w1 = b1 * in + w2 + a1 * out; \
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w2 = b2 * in + a2 * out; \
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*z1 = w1; \
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*z2 = w2; \
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}
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BIQUAD_TDII_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_TDII_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_TDII_FILTER(flt, float, -1., 1., 0)
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BIQUAD_TDII_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_LATT_FILTER(name, type, min, max, need_clipping) \
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static void biquad_latt_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *z1, double *z2, \
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double *unused1, double *unused2, \
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double v0, double v1, double v2, \
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double unused, double k0, double k1, \
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int *clippings, \
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|
int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double s0 = *z1; \
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double s1 = *z2; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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|
double in, out; \
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double t0, t1; \
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\
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for (int i = 0; i < len; i++) { \
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out = 0.; \
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in = ibuf[i]; \
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t0 = in - k1 * s0; \
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t1 = t0 * k1 + s0; \
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out += t1 * v2; \
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\
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t0 = t0 - k0 * s1; \
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t1 = t0 * k0 + s1; \
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out += t1 * v1; \
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\
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out += t0 * v0; \
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s0 = t1; \
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s1 = t0; \
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\
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*z1 = s0; \
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*z2 = s1; \
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}
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BIQUAD_LATT_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_LATT_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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|
BIQUAD_LATT_FILTER(flt, float, -1., 1., 0)
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BIQUAD_LATT_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_SVF_FILTER(name, type, min, max, need_clipping) \
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static void biquad_svf_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *y0, double *y1, \
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double *unused1, double *unused2, \
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double b0, double b1, double b2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double s0 = *y0; \
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double s1 = *y1; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double in, out; \
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double t0, t1; \
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\
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for (int i = 0; i < len; i++) { \
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in = ibuf[i]; \
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out = b2 * in + s0; \
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t0 = b0 * in + a1 * s0 + s1; \
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t1 = b1 * in + a2 * s0; \
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s0 = t0; \
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s1 = t1; \
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\
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*y0 = s0; \
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*y1 = s1; \
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}
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BIQUAD_SVF_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_SVF_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_SVF_FILTER(flt, float, -1., 1., 0)
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BIQUAD_SVF_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_ZDF_FILTER(name, type, min, max, need_clipping) \
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static void biquad_zdf_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *y0, double *y1, \
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double *unused1, double *unused2, \
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double m0, double m1, double m2, \
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double a0, double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double b0 = *y0; \
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double b1 = *y1; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double out; \
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\
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for (int i = 0; i < len; i++) { \
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const double in = ibuf[i]; \
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const double v0 = in; \
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const double v3 = v0 - b1; \
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const double v1 = a0 * b0 + a1 * v3; \
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const double v2 = b1 + a1 * b0 + a2 * v3; \
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\
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b0 = 2. * v1 - b0; \
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b1 = 2. * v2 - b1; \
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\
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out = m0 * v0 + m1 * v1 + m2 * v2; \
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*y0 = b0; \
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*y1 = b1; \
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}
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BIQUAD_ZDF_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_ZDF_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_ZDF_FILTER(flt, float, -1., 1., 0)
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BIQUAD_ZDF_FILTER(dbl, double, -1., 1., 0)
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static void convert_dir2latt(BiquadsContext *s)
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{
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double k0, k1, v0, v1, v2;
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k1 = s->a2;
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k0 = s->a1 / (1. + k1);
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v2 = s->b2;
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v1 = s->b1 - v2 * s->a1;
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v0 = s->b0 - v1 * k0 - v2 * k1;
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s->a1 = k0;
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s->a2 = k1;
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s->b0 = v0;
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s->b1 = v1;
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s->b2 = v2;
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}
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static void convert_dir2svf(BiquadsContext *s)
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{
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double a[2];
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double b[3];
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a[0] = -s->a1;
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a[1] = -s->a2;
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b[0] = s->b1 - s->a1 * s->b0;
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b[1] = s->b2 - s->a2 * s->b0;
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b[2] = s->b0;
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s->a1 = a[0];
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s->a2 = a[1];
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s->b0 = b[0];
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s->b1 = b[1];
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s->b2 = b[2];
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}
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static double convert_width2qfactor(double width,
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double frequency,
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double gain,
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double sample_rate,
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int width_type)
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{
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double w0 = 2. * M_PI * frequency / sample_rate;
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double A = ff_exp10(gain / 40.);
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double ret;
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switch (width_type) {
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case NONE:
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case QFACTOR:
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ret = width;
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break;
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case HERTZ:
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ret = frequency / width;
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break;
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case KHERTZ:
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ret = frequency / (width * 1000.);
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break;
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case OCTAVE:
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ret = 1. / (2. * sinh(log(2.) / 2. * width * w0 / sin(w0)));
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break;
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case SLOPE:
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ret = 1. / sqrt((A + 1. / A) * (1. / width - 1.) + 2.);
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break;
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default:
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av_assert0(0);
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break;
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}
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return ret;
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}
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static void convert_dir2zdf(BiquadsContext *s, int sample_rate)
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{
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double Q = convert_width2qfactor(s->width, s->frequency, s->gain, sample_rate, s->width_type);
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double g, k, A;
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double a[3];
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double m[3];
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switch (s->filter_type) {
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case biquad:
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a[0] = s->oa0;
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a[1] = s->oa1;
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a[2] = s->oa2;
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m[0] = s->ob0;
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m[1] = s->ob1;
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m[2] = s->ob2;
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break;
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case equalizer:
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A = ff_exp10(s->gain / 40.);
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / (Q * A);
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1.;
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m[1] = k * (A * A - 1.);
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m[2] = 0.;
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break;
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case bass:
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case lowshelf:
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A = ff_exp10(s->gain / 40.);
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g = tan(M_PI * s->frequency / sample_rate) / sqrt(A);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1.;
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m[1] = k * (A - 1.);
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m[2] = A * A - 1.;
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break;
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case tiltshelf:
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A = ff_exp10(s->gain / 20.);
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g = tan(M_PI * s->frequency / sample_rate) / sqrt(A);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1./ A;
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m[1] = k * (A - 1.) / A;
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m[2] = (A * A - 1.) / A;
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break;
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case treble:
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case highshelf:
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A = ff_exp10(s->gain / 40.);
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g = tan(M_PI * s->frequency / sample_rate) / sqrt(A);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = A * A;
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m[1] = k * (1. - A) * A;
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m[2] = 1. - A * A;
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break;
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case bandpass:
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 0.;
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m[1] = s->csg ? 1. : k;
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m[2] = 0.;
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break;
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case bandreject:
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1.;
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m[1] = -k;
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m[2] = 0.;
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break;
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case lowpass:
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 0.;
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m[1] = 0.;
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m[2] = 1.;
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break;
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case highpass:
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1.;
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m[1] = -k;
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m[2] = -1.;
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break;
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case allpass:
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g = tan(M_PI * s->frequency / sample_rate);
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k = 1. / Q;
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a[0] = 1. / (1. + g * (g + k));
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a[1] = g * a[0];
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a[2] = g * a[1];
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m[0] = 1.;
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m[1] = -2. * k;
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m[2] = 0.;
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break;
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default:
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av_assert0(0);
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}
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s->a0 = a[0];
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s->a1 = a[1];
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s->a2 = a[2];
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s->b0 = m[0];
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s->b1 = m[1];
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s->b2 = m[2];
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}
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static int config_filter(AVFilterLink *outlink, int reset)
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{
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AVFilterContext *ctx = outlink->src;
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BiquadsContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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double gain = s->gain * ((s->filter_type == tiltshelf) + 1.);
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double A = ff_exp10(gain / 40);
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double w0 = 2 * M_PI * s->frequency / inlink->sample_rate;
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double K = tan(w0 / 2.);
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double alpha, beta;
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s->bypass = (((w0 > M_PI || w0 <= 0.) && reset) || (s->width <= 0.)) && (s->filter_type != biquad);
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if (s->bypass) {
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av_log(ctx, AV_LOG_WARNING, "Invalid frequency and/or width!\n");
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return 0;
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}
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if ((w0 > M_PI || w0 <= 0.) && (s->filter_type != biquad))
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return AVERROR(EINVAL);
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switch (s->width_type) {
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case NONE:
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alpha = 0.0;
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break;
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case HERTZ:
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alpha = sin(w0) / (2 * s->frequency / s->width);
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break;
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case KHERTZ:
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alpha = sin(w0) / (2 * s->frequency / (s->width * 1000));
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break;
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case OCTAVE:
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alpha = sin(w0) * sinh(log(2.) / 2 * s->width * w0 / sin(w0));
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break;
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case QFACTOR:
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alpha = sin(w0) / (2 * s->width);
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break;
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case SLOPE:
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alpha = sin(w0) / 2 * sqrt((A + 1 / A) * (1 / s->width - 1) + 2);
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break;
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default:
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av_assert0(0);
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}
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beta = 2 * sqrt(A);
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switch (s->filter_type) {
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case biquad:
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s->a0 = s->oa0;
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s->a1 = s->oa1;
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s->a2 = s->oa2;
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s->b0 = s->ob0;
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s->b1 = s->ob1;
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s->b2 = s->ob2;
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break;
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case equalizer:
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s->a0 = 1 + alpha / A;
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s->a1 = -2 * cos(w0);
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s->a2 = 1 - alpha / A;
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s->b0 = 1 + alpha * A;
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s->b1 = -2 * cos(w0);
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s->b2 = 1 - alpha * A;
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break;
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case bass:
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beta = sqrt((A * A + 1) - (A - 1) * (A - 1));
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case tiltshelf:
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|
case lowshelf:
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if (s->poles == 1) {
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double A = ff_exp10(gain / 20);
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double ro = -sin(w0 / 2. - M_PI_4) / sin(w0 / 2. + M_PI_4);
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double n = (A + 1) / (A - 1);
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double alpha1 = A == 1. ? 0. : n - FFSIGN(n) * sqrt(n * n - 1);
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double beta0 = ((1 + A) + (1 - A) * alpha1) * 0.5;
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double beta1 = ((1 - A) + (1 + A) * alpha1) * 0.5;
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s->a0 = 1 + ro * alpha1;
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s->a1 = -ro - alpha1;
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|
s->a2 = 0;
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s->b0 = beta0 + ro * beta1;
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s->b1 = -beta1 - ro * beta0;
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s->b2 = 0;
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} else {
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|
s->a0 = (A + 1) + (A - 1) * cos(w0) + beta * alpha;
|
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s->a1 = -2 * ((A - 1) + (A + 1) * cos(w0));
|
|
s->a2 = (A + 1) + (A - 1) * cos(w0) - beta * alpha;
|
|
s->b0 = A * ((A + 1) - (A - 1) * cos(w0) + beta * alpha);
|
|
s->b1 = 2 * A * ((A - 1) - (A + 1) * cos(w0));
|
|
s->b2 = A * ((A + 1) - (A - 1) * cos(w0) - beta * alpha);
|
|
}
|
|
break;
|
|
case treble:
|
|
beta = sqrt((A * A + 1) - (A - 1) * (A - 1));
|
|
case highshelf:
|
|
if (s->poles == 1) {
|
|
double A = ff_exp10(gain / 20);
|
|
double ro = sin(w0 / 2. - M_PI_4) / sin(w0 / 2. + M_PI_4);
|
|
double n = (A + 1) / (A - 1);
|
|
double alpha1 = A == 1. ? 0. : n - FFSIGN(n) * sqrt(n * n - 1);
|
|
double beta0 = ((1 + A) + (1 - A) * alpha1) * 0.5;
|
|
double beta1 = ((1 - A) + (1 + A) * alpha1) * 0.5;
|
|
|
|
s->a0 = 1 + ro * alpha1;
|
|
s->a1 = ro + alpha1;
|
|
s->a2 = 0;
|
|
s->b0 = beta0 + ro * beta1;
|
|
s->b1 = beta1 + ro * beta0;
|
|
s->b2 = 0;
|
|
} else {
|
|
s->a0 = (A + 1) - (A - 1) * cos(w0) + beta * alpha;
|
|
s->a1 = 2 * ((A - 1) - (A + 1) * cos(w0));
|
|
s->a2 = (A + 1) - (A - 1) * cos(w0) - beta * alpha;
|
|
s->b0 = A * ((A + 1) + (A - 1) * cos(w0) + beta * alpha);
|
|
s->b1 =-2 * A * ((A - 1) + (A + 1) * cos(w0));
|
|
s->b2 = A * ((A + 1) + (A - 1) * cos(w0) - beta * alpha);
|
|
}
|
|
break;
|
|
case bandpass:
|
|
if (s->csg) {
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = sin(w0) / 2;
|
|
s->b1 = 0;
|
|
s->b2 = -sin(w0) / 2;
|
|
} else {
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = alpha;
|
|
s->b1 = 0;
|
|
s->b2 = -alpha;
|
|
}
|
|
break;
|
|
case bandreject:
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = 1;
|
|
s->b1 = -2 * cos(w0);
|
|
s->b2 = 1;
|
|
break;
|
|
case lowpass:
|
|
if (s->poles == 1) {
|
|
s->a0 = 1;
|
|
s->a1 = -exp(-w0);
|
|
s->a2 = 0;
|
|
s->b0 = 1 + s->a1;
|
|
s->b1 = 0;
|
|
s->b2 = 0;
|
|
} else {
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = (1 - cos(w0)) / 2;
|
|
s->b1 = 1 - cos(w0);
|
|
s->b2 = (1 - cos(w0)) / 2;
|
|
}
|
|
break;
|
|
case highpass:
|
|
if (s->poles == 1) {
|
|
s->a0 = 1;
|
|
s->a1 = -exp(-w0);
|
|
s->a2 = 0;
|
|
s->b0 = (1 - s->a1) / 2;
|
|
s->b1 = -s->b0;
|
|
s->b2 = 0;
|
|
} else {
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = (1 + cos(w0)) / 2;
|
|
s->b1 = -(1 + cos(w0));
|
|
s->b2 = (1 + cos(w0)) / 2;
|
|
}
|
|
break;
|
|
case allpass:
|
|
switch (s->order) {
|
|
case 1:
|
|
s->a0 = 1.;
|
|
s->a1 = -(1. - K) / (1. + K);
|
|
s->a2 = 0.;
|
|
s->b0 = s->a1;
|
|
s->b1 = s->a0;
|
|
s->b2 = 0.;
|
|
break;
|
|
case 2:
|
|
s->a0 = 1 + alpha;
|
|
s->a1 = -2 * cos(w0);
|
|
s->a2 = 1 - alpha;
|
|
s->b0 = 1 - alpha;
|
|
s->b1 = -2 * cos(w0);
|
|
s->b2 = 1 + alpha;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "a=%f %f %f:b=%f %f %f\n", s->a0, s->a1, s->a2, s->b0, s->b1, s->b2);
|
|
|
|
s->a1 /= s->a0;
|
|
s->a2 /= s->a0;
|
|
s->b0 /= s->a0;
|
|
s->b1 /= s->a0;
|
|
s->b2 /= s->a0;
|
|
s->a0 /= s->a0;
|
|
|
|
if (s->normalize && fabs(s->b0 + s->b1 + s->b2) > 1e-6) {
|
|
double factor = (s->a0 + s->a1 + s->a2) / (s->b0 + s->b1 + s->b2);
|
|
|
|
s->b0 *= factor;
|
|
s->b1 *= factor;
|
|
s->b2 *= factor;
|
|
}
|
|
|
|
switch (s->filter_type) {
|
|
case tiltshelf:
|
|
s->b0 /= A;
|
|
s->b1 /= A;
|
|
s->b2 /= A;
|
|
break;
|
|
}
|
|
|
|
s->cache = av_realloc_f(s->cache, sizeof(ChanCache), inlink->ch_layout.nb_channels);
|
|
if (!s->cache)
|
|
return AVERROR(ENOMEM);
|
|
if (reset)
|
|
memset(s->cache, 0, sizeof(ChanCache) * inlink->ch_layout.nb_channels);
|
|
|
|
if (reset && s->block_samples > 0) {
|
|
for (int i = 0; i < 3; i++) {
|
|
s->block[i] = ff_get_audio_buffer(outlink, s->block_samples * 2);
|
|
if (!s->block[i])
|
|
return AVERROR(ENOMEM);
|
|
av_samples_set_silence(s->block[i]->extended_data, 0, s->block_samples * 2,
|
|
s->block[i]->ch_layout.nb_channels, s->block[i]->format);
|
|
}
|
|
}
|
|
|
|
switch (s->transform_type) {
|
|
case DI:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case DII:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_dii_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_dii_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_dii_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_dii_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case TDI:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_tdi_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_tdi_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_tdi_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_tdi_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case TDII:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_tdii_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_tdii_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_tdii_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_tdii_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case LATT:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_latt_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_latt_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_latt_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_latt_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case SVF:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_svf_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_svf_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_svf_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_svf_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
case ZDF:
|
|
switch (inlink->format) {
|
|
case AV_SAMPLE_FMT_S16P:
|
|
s->filter = biquad_zdf_s16;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P:
|
|
s->filter = biquad_zdf_s32;
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
s->filter = biquad_zdf_flt;
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
s->filter = biquad_zdf_dbl;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
s->block_align = av_get_bytes_per_sample(inlink->format);
|
|
|
|
if (s->transform_type == LATT)
|
|
convert_dir2latt(s);
|
|
else if (s->transform_type == SVF)
|
|
convert_dir2svf(s);
|
|
else if (s->transform_type == ZDF)
|
|
convert_dir2zdf(s, inlink->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
return config_filter(outlink, 1);
|
|
}
|
|
|
|
typedef struct ThreadData {
|
|
AVFrame *in, *out;
|
|
int eof;
|
|
} ThreadData;
|
|
|
|
static void reverse_samples(AVFrame *out, AVFrame *in, int p,
|
|
int oo, int io, int nb_samples)
|
|
{
|
|
switch (out->format) {
|
|
case AV_SAMPLE_FMT_S16P: {
|
|
const int16_t *src = ((const int16_t *)in->extended_data[p]) + io;
|
|
int16_t *dst = ((int16_t *)out->extended_data[p]) + oo;
|
|
for (int i = 0, j = nb_samples - 1; i < nb_samples; i++, j--)
|
|
dst[i] = src[j];
|
|
}
|
|
break;
|
|
case AV_SAMPLE_FMT_S32P: {
|
|
const int32_t *src = ((const int32_t *)in->extended_data[p]) + io;
|
|
int32_t *dst = ((int32_t *)out->extended_data[p]) + oo;
|
|
for (int i = 0, j = nb_samples - 1; i < nb_samples; i++, j--)
|
|
dst[i] = src[j];
|
|
}
|
|
break;
|
|
case AV_SAMPLE_FMT_FLTP: {
|
|
const float *src = ((const float *)in->extended_data[p]) + io;
|
|
float *dst = ((float *)out->extended_data[p]) + oo;
|
|
for (int i = 0, j = nb_samples - 1; i < nb_samples; i++, j--)
|
|
dst[i] = src[j];
|
|
}
|
|
break;
|
|
case AV_SAMPLE_FMT_DBLP: {
|
|
const double *src = ((const double *)in->extended_data[p]) + io;
|
|
double *dst = ((double *)out->extended_data[p]) + oo;
|
|
for (int i = 0, j = nb_samples - 1; i < nb_samples; i++, j--)
|
|
dst[i] = src[j];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
|
|
{
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
ThreadData *td = arg;
|
|
AVFrame *buf = td->in;
|
|
AVFrame *out_buf = td->out;
|
|
BiquadsContext *s = ctx->priv;
|
|
const int start = (buf->ch_layout.nb_channels * jobnr) / nb_jobs;
|
|
const int end = (buf->ch_layout.nb_channels * (jobnr+1)) / nb_jobs;
|
|
int ch;
|
|
|
|
for (ch = start; ch < end; ch++) {
|
|
enum AVChannel channel = av_channel_layout_channel_from_index(&inlink->ch_layout, ch);
|
|
|
|
if (av_channel_layout_index_from_channel(&s->ch_layout, channel) < 0) {
|
|
if (buf != out_buf)
|
|
memcpy(out_buf->extended_data[ch], buf->extended_data[ch],
|
|
buf->nb_samples * s->block_align);
|
|
continue;
|
|
}
|
|
|
|
if (!s->block_samples) {
|
|
s->filter(s, buf->extended_data[ch], out_buf->extended_data[ch], buf->nb_samples,
|
|
&s->cache[ch].i1, &s->cache[ch].i2, &s->cache[ch].o1, &s->cache[ch].o2,
|
|
s->b0, s->b1, s->b2, s->a0, s->a1, s->a2, &s->cache[ch].clippings, ctx->is_disabled);
|
|
} else if (td->eof) {
|
|
memcpy(out_buf->extended_data[ch], s->block[1]->extended_data[ch] + s->block_align * s->block_samples,
|
|
s->nb_samples * s->block_align);
|
|
} else {
|
|
memcpy(s->block[0]->extended_data[ch] + s->block_align * s->block_samples, buf->extended_data[ch],
|
|
buf->nb_samples * s->block_align);
|
|
memset(s->block[0]->extended_data[ch] + s->block_align * (s->block_samples + buf->nb_samples),
|
|
0, (s->block_samples - buf->nb_samples) * s->block_align);
|
|
s->filter(s, s->block[0]->extended_data[ch], s->block[1]->extended_data[ch], s->block_samples,
|
|
&s->cache[ch].i1, &s->cache[ch].i2, &s->cache[ch].o1, &s->cache[ch].o2,
|
|
s->b0, s->b1, s->b2, s->a0, s->a1, s->a2, &s->cache[ch].clippings, ctx->is_disabled);
|
|
s->cache[ch].ri1 = s->cache[ch].i1;
|
|
s->cache[ch].ri2 = s->cache[ch].i2;
|
|
s->cache[ch].ro1 = s->cache[ch].o1;
|
|
s->cache[ch].ro2 = s->cache[ch].o2;
|
|
s->filter(s, s->block[0]->extended_data[ch] + s->block_samples * s->block_align,
|
|
s->block[1]->extended_data[ch] + s->block_samples * s->block_align,
|
|
s->block_samples,
|
|
&s->cache[ch].ri1, &s->cache[ch].ri2, &s->cache[ch].ro1, &s->cache[ch].ro2,
|
|
s->b0, s->b1, s->b2, s->a0, s->a1, s->a2, &s->cache[ch].clippings, ctx->is_disabled);
|
|
reverse_samples(s->block[2], s->block[1], ch, 0, 0, 2 * s->block_samples);
|
|
s->cache[ch].ri1 = 0.;
|
|
s->cache[ch].ri2 = 0.;
|
|
s->cache[ch].ro1 = 0.;
|
|
s->cache[ch].ro2 = 0.;
|
|
s->filter(s, s->block[2]->extended_data[ch], s->block[2]->extended_data[ch], 2 * s->block_samples,
|
|
&s->cache[ch].ri1, &s->cache[ch].ri2, &s->cache[ch].ro1, &s->cache[ch].ro2,
|
|
s->b0, s->b1, s->b2, s->a0, s->a1, s->a2, &s->cache[ch].clippings, ctx->is_disabled);
|
|
reverse_samples(s->block[1], s->block[2], ch, 0, 0, 2 * s->block_samples);
|
|
memcpy(out_buf->extended_data[ch], s->block[1]->extended_data[ch],
|
|
s->block_samples * s->block_align);
|
|
memmove(s->block[0]->extended_data[ch], s->block[0]->extended_data[ch] + s->block_align * s->block_samples,
|
|
s->block_samples * s->block_align);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *buf, int eof)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BiquadsContext *s = ctx->priv;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
AVFrame *out_buf;
|
|
ThreadData td;
|
|
int ch, ret, drop = 0;
|
|
|
|
if (s->bypass)
|
|
return ff_filter_frame(outlink, buf);
|
|
|
|
ret = av_channel_layout_copy(&s->ch_layout, &inlink->ch_layout);
|
|
if (ret < 0) {
|
|
av_frame_free(&buf);
|
|
return ret;
|
|
}
|
|
if (strcmp(s->ch_layout_str, "all"))
|
|
av_channel_layout_from_string(&s->ch_layout,
|
|
s->ch_layout_str);
|
|
|
|
if (av_frame_is_writable(buf) && s->block_samples == 0) {
|
|
out_buf = buf;
|
|
} else {
|
|
out_buf = ff_get_audio_buffer(outlink, s->block_samples > 0 ? s->block_samples : buf->nb_samples);
|
|
if (!out_buf) {
|
|
av_frame_free(&buf);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out_buf, buf);
|
|
}
|
|
|
|
if (s->block_samples > 0 && s->pts == AV_NOPTS_VALUE)
|
|
drop = 1;
|
|
td.in = buf;
|
|
td.out = out_buf;
|
|
td.eof = eof;
|
|
ff_filter_execute(ctx, filter_channel, &td, NULL,
|
|
FFMIN(outlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
|
|
|
|
for (ch = 0; ch < outlink->ch_layout.nb_channels; ch++) {
|
|
if (s->cache[ch].clippings > 0)
|
|
av_log(ctx, AV_LOG_WARNING, "Channel %d clipping %d times. Please reduce gain.\n",
|
|
ch, s->cache[ch].clippings);
|
|
s->cache[ch].clippings = 0;
|
|
}
|
|
|
|
if (s->block_samples > 0) {
|
|
int nb_samples = buf->nb_samples;
|
|
int64_t pts = buf->pts;
|
|
|
|
out_buf->pts = s->pts;
|
|
out_buf->nb_samples = s->nb_samples;
|
|
s->pts = pts;
|
|
s->nb_samples = nb_samples;
|
|
}
|
|
|
|
if (buf != out_buf)
|
|
av_frame_free(&buf);
|
|
|
|
if (!drop)
|
|
return ff_filter_frame(outlink, out_buf);
|
|
else {
|
|
av_frame_free(&out_buf);
|
|
ff_filter_set_ready(ctx, 10);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
BiquadsContext *s = ctx->priv;
|
|
AVFrame *in = NULL;
|
|
int64_t pts;
|
|
int status;
|
|
int ret;
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
|
|
|
|
if (s->block_samples > 0) {
|
|
ret = ff_inlink_consume_samples(inlink, s->block_samples, s->block_samples, &in);
|
|
} else {
|
|
ret = ff_inlink_consume_frame(inlink, &in);
|
|
}
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
return filter_frame(inlink, in, 0);
|
|
|
|
if (s->block_samples > 0 && ff_inlink_queued_samples(inlink) >= s->block_samples) {
|
|
ff_filter_set_ready(ctx, 10);
|
|
return 0;
|
|
}
|
|
|
|
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
|
|
if (s->block_samples > 0) {
|
|
AVFrame *in = ff_get_audio_buffer(outlink, s->block_samples);
|
|
if (!in)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = filter_frame(inlink, in, 1);
|
|
}
|
|
|
|
ff_outlink_set_status(outlink, status, pts);
|
|
|
|
return ret;
|
|
}
|
|
|
|
FF_FILTER_FORWARD_WANTED(outlink, inlink);
|
|
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
|
|
char *res, int res_len, int flags)
|
|
{
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
int ret;
|
|
|
|
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return config_filter(outlink, 0);
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
BiquadsContext *s = ctx->priv;
|
|
|
|
for (int i = 0; i < 3; i++)
|
|
av_frame_free(&s->block[i]);
|
|
av_freep(&s->cache);
|
|
av_channel_layout_uninit(&s->ch_layout);
|
|
}
|
|
|
|
static const AVFilterPad inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
#define OFFSET(x) offsetof(BiquadsContext, x)
|
|
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
|
|
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
|
|
#define DEFINE_BIQUAD_FILTER_2(name_, description_, priv_class_) \
|
|
static av_cold int name_##_init(AVFilterContext *ctx) \
|
|
{ \
|
|
BiquadsContext *s = ctx->priv; \
|
|
s->filter_type = name_; \
|
|
s->pts = AV_NOPTS_VALUE; \
|
|
return 0; \
|
|
} \
|
|
\
|
|
const AVFilter ff_af_##name_ = { \
|
|
.name = #name_, \
|
|
.description = NULL_IF_CONFIG_SMALL(description_), \
|
|
.priv_class = &priv_class_##_class, \
|
|
.priv_size = sizeof(BiquadsContext), \
|
|
.init = name_##_init, \
|
|
.activate = activate, \
|
|
.uninit = uninit, \
|
|
FILTER_INPUTS(inputs), \
|
|
FILTER_OUTPUTS(outputs), \
|
|
FILTER_QUERY_FUNC(query_formats), \
|
|
.process_command = process_command, \
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, \
|
|
}
|
|
|
|
#define DEFINE_BIQUAD_FILTER(name, description) \
|
|
AVFILTER_DEFINE_CLASS(name); \
|
|
DEFINE_BIQUAD_FILTER_2(name, description, name)
|
|
|
|
#define WIDTH_OPTION(x) \
|
|
{"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 99999, FLAGS}, \
|
|
{"w", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 99999, FLAGS}
|
|
|
|
#define WIDTH_TYPE_OPTION(x) \
|
|
{"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=x}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"}, \
|
|
{"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=x}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"}, \
|
|
{"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"}, \
|
|
{"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"}, \
|
|
{"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"}, \
|
|
{"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"}, \
|
|
{"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"}
|
|
|
|
#define MIX_CHANNELS_NORMALIZE_OPTION(x, y, z) \
|
|
{"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 1, FLAGS}, \
|
|
{"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 1, FLAGS}, \
|
|
{"channels", "set channels to filter", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str=y}, 0, 0, FLAGS}, \
|
|
{"c", "set channels to filter", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str=y}, 0, 0, FLAGS}, \
|
|
{"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=z}, 0, 1, FLAGS}, \
|
|
{"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=z}, 0, 1, FLAGS}
|
|
|
|
#define TRANSFORM_OPTION(x) \
|
|
{"transform", "set transform type", OFFSET(transform_type), AV_OPT_TYPE_INT, {.i64=x}, 0, NB_TTYPE-1, AF, "transform_type"}, \
|
|
{"a", "set transform type", OFFSET(transform_type), AV_OPT_TYPE_INT, {.i64=x}, 0, NB_TTYPE-1, AF, "transform_type"}, \
|
|
{"di", "direct form I", 0, AV_OPT_TYPE_CONST, {.i64=DI}, 0, 0, AF, "transform_type"}, \
|
|
{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"}, \
|
|
{"tdi", "transposed direct form I", 0, AV_OPT_TYPE_CONST, {.i64=TDI}, 0, 0, AF, "transform_type"}, \
|
|
{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"}, \
|
|
{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"}, \
|
|
{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"}, \
|
|
{"zdf", "zero-delay filter form", 0, AV_OPT_TYPE_CONST, {.i64=ZDF}, 0, 0, AF, "transform_type"}
|
|
|
|
#define PRECISION_OPTION(x) \
|
|
{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=x}, -1, 3, AF, "precision"}, \
|
|
{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=x}, -1, 3, AF, "precision"}, \
|
|
{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"}, \
|
|
{"s16", "signed 16-bit", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision"}, \
|
|
{"s32", "signed 32-bit", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision"}, \
|
|
{"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision"}, \
|
|
{"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "precision"}
|
|
|
|
#define BLOCKSIZE_OPTION(x) \
|
|
{"blocksize", "set the block size", OFFSET(block_samples), AV_OPT_TYPE_INT, {.i64=x}, 0, 32768, AF}, \
|
|
{"b", "set the block size", OFFSET(block_samples), AV_OPT_TYPE_INT, {.i64=x}, 0, 32768, AF}
|
|
|
|
#if CONFIG_EQUALIZER_FILTER
|
|
static const AVOption equalizer_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(1.0),
|
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(equalizer, "Apply two-pole peaking equalization (EQ) filter.");
|
|
#endif /* CONFIG_EQUALIZER_FILTER */
|
|
#if CONFIG_BASS_FILTER || CONFIG_LOWSHELF_FILTER
|
|
static const AVOption bass_lowshelf_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.5),
|
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS_EXT(bass_lowshelf, "bass/lowshelf", bass_lowshelf_options);
|
|
#if CONFIG_BASS_FILTER
|
|
DEFINE_BIQUAD_FILTER_2(bass, "Boost or cut lower frequencies.", bass_lowshelf);
|
|
#endif /* CONFIG_BASS_FILTER */
|
|
|
|
#if CONFIG_LOWSHELF_FILTER
|
|
DEFINE_BIQUAD_FILTER_2(lowshelf, "Apply a low shelf filter.", bass_lowshelf);
|
|
#endif /* CONFIG_LOWSHELF_FILTER */
|
|
#endif /* CONFIG_BASS_FILTER || CONFIG LOWSHELF_FILTER */
|
|
#if CONFIG_TREBLE_FILTER || CONFIG_HIGHSHELF_FILTER || CONFIG_TILTSHELF_FILTER
|
|
static const AVOption treble_highshelf_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.5),
|
|
{"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
{"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
|
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS_EXT(treble_highshelf, "treble/high/tiltshelf",
|
|
treble_highshelf_options);
|
|
|
|
#if CONFIG_TREBLE_FILTER
|
|
DEFINE_BIQUAD_FILTER_2(treble, "Boost or cut upper frequencies.", treble_highshelf);
|
|
#endif /* CONFIG_TREBLE_FILTER */
|
|
|
|
#if CONFIG_HIGHSHELF_FILTER
|
|
DEFINE_BIQUAD_FILTER_2(highshelf, "Apply a high shelf filter.", treble_highshelf);
|
|
#endif /* CONFIG_HIGHSHELF_FILTER */
|
|
|
|
#if CONFIG_TILTSHELF_FILTER
|
|
DEFINE_BIQUAD_FILTER_2(tiltshelf, "Apply a tilt shelf filter.", treble_highshelf);
|
|
#endif
|
|
#endif /* CONFIG_TREBLE_FILTER || CONFIG_HIGHSHELF_FILTER || CONFIG_TILTSHELF_FILTER */
|
|
|
|
#if CONFIG_BANDPASS_FILTER
|
|
static const AVOption bandpass_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.5),
|
|
{"csg", "use constant skirt gain", OFFSET(csg), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(bandpass, "Apply a two-pole Butterworth band-pass filter.");
|
|
#endif /* CONFIG_BANDPASS_FILTER */
|
|
#if CONFIG_BANDREJECT_FILTER
|
|
static const AVOption bandreject_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.5),
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(bandreject, "Apply a two-pole Butterworth band-reject filter.");
|
|
#endif /* CONFIG_BANDREJECT_FILTER */
|
|
#if CONFIG_LOWPASS_FILTER
|
|
static const AVOption lowpass_options[] = {
|
|
{"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
|
|
{"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.707),
|
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(lowpass, "Apply a low-pass filter with 3dB point frequency.");
|
|
#endif /* CONFIG_LOWPASS_FILTER */
|
|
#if CONFIG_HIGHPASS_FILTER
|
|
static const AVOption highpass_options[] = {
|
|
{"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
{"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.707),
|
|
{"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
{"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(highpass, "Apply a high-pass filter with 3dB point frequency.");
|
|
#endif /* CONFIG_HIGHPASS_FILTER */
|
|
#if CONFIG_ALLPASS_FILTER
|
|
static const AVOption allpass_options[] = {
|
|
{"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
{"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
|
|
WIDTH_TYPE_OPTION(QFACTOR),
|
|
WIDTH_OPTION(0.707),
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
{"order", "set filter order", OFFSET(order), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
|
{"o", "set filter order", OFFSET(order), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, FLAGS},
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(allpass, "Apply a two-pole all-pass filter.");
|
|
#endif /* CONFIG_ALLPASS_FILTER */
|
|
#if CONFIG_BIQUAD_FILTER
|
|
static const AVOption biquad_options[] = {
|
|
{"a0", NULL, OFFSET(oa0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT32_MIN, INT32_MAX, FLAGS},
|
|
{"a1", NULL, OFFSET(oa1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
|
|
{"a2", NULL, OFFSET(oa2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
|
|
{"b0", NULL, OFFSET(ob0), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
|
|
{"b1", NULL, OFFSET(ob1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
|
|
{"b2", NULL, OFFSET(ob2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
|
|
MIX_CHANNELS_NORMALIZE_OPTION(1, "all", 0),
|
|
TRANSFORM_OPTION(DI),
|
|
PRECISION_OPTION(-1),
|
|
BLOCKSIZE_OPTION(0),
|
|
{NULL}
|
|
};
|
|
|
|
DEFINE_BIQUAD_FILTER(biquad, "Apply a biquad IIR filter with the given coefficients.");
|
|
#endif /* CONFIG_BIQUAD_FILTER */
|