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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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#include <float.h> |
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#include "libavutil/avassert.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/xga_font_data.h" |
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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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typedef struct ThreadData { |
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AVFrame *in, *out; |
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} ThreadData; |
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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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double a[3]; |
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double b[3]; |
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double i1, i2; |
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double o1, o2; |
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} BiquadContext; |
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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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BiquadContext *biquads; |
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int clippings; |
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} IIRChannel; |
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typedef struct AudioIIRContext { |
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const AVClass *class; |
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char *a_str, *b_str, *g_str; |
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double dry_gain, wet_gain; |
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double mix; |
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int normalize; |
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int format; |
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int process; |
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int precision; |
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int response; |
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int w, h; |
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int ir_channel; |
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AVRational rate; |
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AVFrame *video; |
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IIRChannel *iir; |
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int channels; |
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enum AVSampleFormat sample_format; |
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int (*iir_channel)(AVFilterContext *ctx, void *arg, int ch, int nb_jobs); |
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} AudioIIRContext; |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AudioIIRContext *s = ctx->priv; |
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AVFilterFormats *formats; |
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AVFilterChannelLayouts *layouts; |
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enum AVSampleFormat sample_fmts[] = { |
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AV_SAMPLE_FMT_DBLP, |
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AV_SAMPLE_FMT_NONE |
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}; |
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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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int ret; |
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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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if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0) |
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return ret; |
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} |
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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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sample_fmts[0] = s->sample_format; |
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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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#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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{ \ |
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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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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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double *oc = (double *)s->iir[ch].cache[0]; \ |
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double *ic = (double *)s->iir[ch].cache[1]; \ |
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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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const double g = s->iir[ch].g; \ |
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int *clippings = &s->iir[ch].clippings; \ |
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type *dst = (type *)out->extended_data[ch]; \ |
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int n; \ |
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\ |
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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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\ |
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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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\ |
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for (x = 1; x < nb_a; x++) \ |
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sample -= a[x] * oc[x]; \ |
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\ |
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oc[0] = sample; \ |
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sample *= og * g; \ |
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sample = sample * mix + ic[0] * (1. - mix); \ |
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if (need_clipping && sample < min) { \ |
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(*clippings)++; \ |
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dst[n] = min; \ |
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} else if (need_clipping && sample > max) { \ |
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(*clippings)++; \ |
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dst[n] = max; \ |
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} else { \ |
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dst[n] = sample; \ |
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} \ |
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} \ |
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\ |
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return 0; \ |
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} |
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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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#define SERIAL_IIR_CH(name, type, min, max, need_clipping) \ |
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static int iir_ch_serial_## name(AVFilterContext *ctx, void *arg, 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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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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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 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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double i1 = iir->biquads[i].i1; \ |
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double i2 = iir->biquads[i].i2; \ |
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double o1 = iir->biquads[i].o1; \ |
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double o2 = iir->biquads[i].o2; \ |
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\ |
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for (n = 0; n < in->nb_samples; n++) { \ |
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double sample = ig * (i ? dst[n] : src[n]); \ |
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double o0 = sample * b0 + i1 * b1 + i2 * b2 + o1 * a1 + o2 * a2; \ |
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\ |
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i2 = i1; \ |
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i1 = src[n]; \ |
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o2 = o1; \ |
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o1 = o0; \ |
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o0 *= og * g; \ |
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\ |
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o0 = o0 * mix + (1. - mix) * sample; \ |
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if (need_clipping && o0 < min) { \ |
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(*clippings)++; \ |
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dst[n] = min; \ |
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} else if (need_clipping && o0 > max) { \ |
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(*clippings)++; \ |
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dst[n] = max; \ |
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} else { \ |
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dst[n] = o0; \ |
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} \ |
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} \ |
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iir->biquads[i].i1 = i1; \ |
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iir->biquads[i].i2 = i2; \ |
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iir->biquads[i].o1 = o1; \ |
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iir->biquads[i].o2 = o2; \ |
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} \ |
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\ |
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return 0; \ |
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} |
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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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static void count_coefficients(char *item_str, int *nb_items) |
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{ |
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char *p; |
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if (!item_str) |
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return; |
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*nb_items = 1; |
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for (p = item_str; *p && *p != '|'; p++) { |
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if (*p == ' ') |
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(*nb_items)++; |
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} |
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} |
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static int read_gains(AVFilterContext *ctx, char *item_str, int nb_items) |
257 |
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{ |
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AudioIIRContext *s = ctx->priv; |
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char *p, *arg, *old_str, *prev_arg = NULL, *saveptr = NULL; |
260 |
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int i; |
261 |
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262 |
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p = old_str = av_strdup(item_str); |
263 |
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if (!p) |
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return AVERROR(ENOMEM); |
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for (i = 0; i < nb_items; i++) { |
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if (!(arg = av_strtok(p, "|", &saveptr))) |
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arg = prev_arg; |
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269 |
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if (!arg) { |
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av_freep(&old_str); |
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return AVERROR(EINVAL); |
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} |
273 |
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274 |
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p = NULL; |
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if (sscanf(arg, "%lf", &s->iir[i].g) != 1) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid gains supplied: %s\n", arg); |
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av_freep(&old_str); |
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return AVERROR(EINVAL); |
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} |
280 |
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281 |
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prev_arg = arg; |
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} |
283 |
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284 |
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av_freep(&old_str); |
285 |
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286 |
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return 0; |
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} |
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289 |
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static int read_tf_coefficients(AVFilterContext *ctx, char *item_str, int nb_items, double *dst) |
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{ |
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char *p, *arg, *old_str, *saveptr = NULL; |
292 |
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int i; |
293 |
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294 |
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p = old_str = av_strdup(item_str); |
295 |
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if (!p) |
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return AVERROR(ENOMEM); |
297 |
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for (i = 0; i < nb_items; i++) { |
298 |
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if (!(arg = av_strtok(p, " ", &saveptr))) |
299 |
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break; |
300 |
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301 |
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p = NULL; |
302 |
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if (sscanf(arg, "%lf", &dst[i]) != 1) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid coefficients supplied: %s\n", arg); |
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av_freep(&old_str); |
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return AVERROR(EINVAL); |
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} |
307 |
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} |
308 |
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309 |
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av_freep(&old_str); |
310 |
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311 |
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return 0; |
312 |
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} |
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314 |
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static int read_zp_coefficients(AVFilterContext *ctx, char *item_str, int nb_items, double *dst, const char *format) |
315 |
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{ |
316 |
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char *p, *arg, *old_str, *saveptr = NULL; |
317 |
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int i; |
318 |
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319 |
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p = old_str = av_strdup(item_str); |
320 |
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if (!p) |
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return AVERROR(ENOMEM); |
322 |
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for (i = 0; i < nb_items; i++) { |
323 |
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if (!(arg = av_strtok(p, " ", &saveptr))) |
324 |
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break; |
325 |
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326 |
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p = NULL; |
327 |
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if (sscanf(arg, format, &dst[i*2], &dst[i*2+1]) != 2) { |
328 |
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av_log(ctx, AV_LOG_ERROR, "Invalid coefficients supplied: %s\n", arg); |
329 |
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av_freep(&old_str); |
330 |
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return AVERROR(EINVAL); |
331 |
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} |
332 |
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} |
333 |
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334 |
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av_freep(&old_str); |
335 |
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336 |
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return 0; |
337 |
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} |
338 |
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339 |
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static const char *format[] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" }; |
340 |
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341 |
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static int read_channels(AVFilterContext *ctx, int channels, uint8_t *item_str, int ab) |
342 |
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{ |
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AudioIIRContext *s = ctx->priv; |
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char *p, *arg, *old_str, *prev_arg = NULL, *saveptr = NULL; |
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int i, ret; |
346 |
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347 |
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p = old_str = av_strdup(item_str); |
348 |
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if (!p) |
349 |
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return AVERROR(ENOMEM); |
350 |
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for (i = 0; i < channels; i++) { |
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IIRChannel *iir = &s->iir[i]; |
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353 |
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if (!(arg = av_strtok(p, "|", &saveptr))) |
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arg = prev_arg; |
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356 |
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if (!arg) { |
357 |
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av_freep(&old_str); |
358 |
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return AVERROR(EINVAL); |
359 |
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} |
360 |
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|
361 |
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count_coefficients(arg, &iir->nb_ab[ab]); |
362 |
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363 |
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p = NULL; |
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iir->cache[ab] = av_calloc(iir->nb_ab[ab] + 1, sizeof(double)); |
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iir->ab[ab] = av_calloc(iir->nb_ab[ab] * (!!s->format + 1), sizeof(double)); |
366 |
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if (!iir->ab[ab] || !iir->cache[ab]) { |
367 |
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av_freep(&old_str); |
368 |
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return AVERROR(ENOMEM); |
369 |
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} |
370 |
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|
371 |
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if (s->format) { |
372 |
|
|
ret = read_zp_coefficients(ctx, arg, iir->nb_ab[ab], iir->ab[ab], format[s->format]); |
373 |
|
|
} else { |
374 |
|
|
ret = read_tf_coefficients(ctx, arg, iir->nb_ab[ab], iir->ab[ab]); |
375 |
|
|
} |
376 |
|
|
if (ret < 0) { |
377 |
|
|
av_freep(&old_str); |
378 |
|
|
return ret; |
379 |
|
|
} |
380 |
|
|
prev_arg = arg; |
381 |
|
|
} |
382 |
|
|
|
383 |
|
|
av_freep(&old_str); |
384 |
|
|
|
385 |
|
|
return 0; |
386 |
|
|
} |
387 |
|
|
|
388 |
|
|
static void cmul(double re, double im, double re2, double im2, double *RE, double *IM) |
389 |
|
|
{ |
390 |
|
|
*RE = re * re2 - im * im2; |
391 |
|
|
*IM = re * im2 + re2 * im; |
392 |
|
|
} |
393 |
|
|
|
394 |
|
|
static int expand(AVFilterContext *ctx, double *pz, int n, double *coefs) |
395 |
|
|
{ |
396 |
|
|
coefs[2 * n] = 1.0; |
397 |
|
|
|
398 |
|
|
for (int i = 1; i <= n; i++) { |
399 |
|
|
for (int j = n - i; j < n; j++) { |
400 |
|
|
double re, im; |
401 |
|
|
|
402 |
|
|
cmul(coefs[2 * (j + 1)], coefs[2 * (j + 1) + 1], |
403 |
|
|
pz[2 * (i - 1)], pz[2 * (i - 1) + 1], &re, &im); |
404 |
|
|
|
405 |
|
|
coefs[2 * j] -= re; |
406 |
|
|
coefs[2 * j + 1] -= im; |
407 |
|
|
} |
408 |
|
|
} |
409 |
|
|
|
410 |
|
|
for (int i = 0; i < n + 1; i++) { |
411 |
|
|
if (fabs(coefs[2 * i + 1]) > FLT_EPSILON) { |
412 |
|
|
av_log(ctx, AV_LOG_ERROR, "coefs: %f of z^%d is not real; poles/zeros are not complex conjugates.\n", |
413 |
|
|
coefs[2 * i + 1], i); |
414 |
|
|
return AVERROR(EINVAL); |
415 |
|
|
} |
416 |
|
|
} |
417 |
|
|
|
418 |
|
|
return 0; |
419 |
|
|
} |
420 |
|
|
|
421 |
|
|
static void normalize_coeffs(AVFilterContext *ctx, int ch) |
422 |
|
|
{ |
423 |
|
|
AudioIIRContext *s = ctx->priv; |
424 |
|
|
IIRChannel *iir = &s->iir[ch]; |
425 |
|
|
double sum_den = 0.; |
426 |
|
|
|
427 |
|
|
if (!s->normalize) |
428 |
|
|
return; |
429 |
|
|
|
430 |
|
|
for (int i = 0; i < iir->nb_ab[1]; i++) { |
431 |
|
|
sum_den += iir->ab[1][i]; |
432 |
|
|
} |
433 |
|
|
|
434 |
|
|
if (sum_den > 1e-6) { |
435 |
|
|
double factor, sum_num = 0.; |
436 |
|
|
|
437 |
|
|
for (int i = 0; i < iir->nb_ab[0]; i++) { |
438 |
|
|
sum_num += iir->ab[0][i]; |
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
factor = sum_num / sum_den; |
442 |
|
|
|
443 |
|
|
for (int i = 0; i < iir->nb_ab[1]; i++) { |
444 |
|
|
iir->ab[1][i] *= factor; |
445 |
|
|
} |
446 |
|
|
} |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
static int convert_zp2tf(AVFilterContext *ctx, int channels) |
450 |
|
|
{ |
451 |
|
|
AudioIIRContext *s = ctx->priv; |
452 |
|
|
int ch, i, j, ret = 0; |
453 |
|
|
|
454 |
|
|
for (ch = 0; ch < channels; ch++) { |
455 |
|
|
IIRChannel *iir = &s->iir[ch]; |
456 |
|
|
double *topc, *botc; |
457 |
|
|
|
458 |
|
|
topc = av_calloc((iir->nb_ab[1] + 1) * 2, sizeof(*topc)); |
459 |
|
|
botc = av_calloc((iir->nb_ab[0] + 1) * 2, sizeof(*botc)); |
460 |
|
|
if (!topc || !botc) { |
461 |
|
|
ret = AVERROR(ENOMEM); |
462 |
|
|
goto fail; |
463 |
|
|
} |
464 |
|
|
|
465 |
|
|
ret = expand(ctx, iir->ab[0], iir->nb_ab[0], botc); |
466 |
|
|
if (ret < 0) { |
467 |
|
|
goto fail; |
468 |
|
|
} |
469 |
|
|
|
470 |
|
|
ret = expand(ctx, iir->ab[1], iir->nb_ab[1], topc); |
471 |
|
|
if (ret < 0) { |
472 |
|
|
goto fail; |
473 |
|
|
} |
474 |
|
|
|
475 |
|
|
for (j = 0, i = iir->nb_ab[1]; i >= 0; j++, i--) { |
476 |
|
|
iir->ab[1][j] = topc[2 * i]; |
477 |
|
|
} |
478 |
|
|
iir->nb_ab[1]++; |
479 |
|
|
|
480 |
|
|
for (j = 0, i = iir->nb_ab[0]; i >= 0; j++, i--) { |
481 |
|
|
iir->ab[0][j] = botc[2 * i]; |
482 |
|
|
} |
483 |
|
|
iir->nb_ab[0]++; |
484 |
|
|
|
485 |
|
|
normalize_coeffs(ctx, ch); |
486 |
|
|
|
487 |
|
|
fail: |
488 |
|
|
av_free(topc); |
489 |
|
|
av_free(botc); |
490 |
|
|
if (ret < 0) |
491 |
|
|
break; |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
return ret; |
495 |
|
|
} |
496 |
|
|
|
497 |
|
|
static int decompose_zp2biquads(AVFilterContext *ctx, int channels) |
498 |
|
|
{ |
499 |
|
|
AudioIIRContext *s = ctx->priv; |
500 |
|
|
int ch, ret; |
501 |
|
|
|
502 |
|
|
for (ch = 0; ch < channels; ch++) { |
503 |
|
|
IIRChannel *iir = &s->iir[ch]; |
504 |
|
|
int nb_biquads = (FFMAX(iir->nb_ab[0], iir->nb_ab[1]) + 1) / 2; |
505 |
|
|
int current_biquad = 0; |
506 |
|
|
|
507 |
|
|
iir->biquads = av_calloc(nb_biquads, sizeof(BiquadContext)); |
508 |
|
|
if (!iir->biquads) |
509 |
|
|
return AVERROR(ENOMEM); |
510 |
|
|
|
511 |
|
|
while (nb_biquads--) { |
512 |
|
|
Pair outmost_pole = { -1, -1 }; |
513 |
|
|
Pair nearest_zero = { -1, -1 }; |
514 |
|
|
double zeros[4] = { 0 }; |
515 |
|
|
double poles[4] = { 0 }; |
516 |
|
|
double b[6] = { 0 }; |
517 |
|
|
double a[6] = { 0 }; |
518 |
|
|
double min_distance = DBL_MAX; |
519 |
|
|
double max_mag = 0; |
520 |
|
|
double factor; |
521 |
|
|
int i; |
522 |
|
|
|
523 |
|
|
for (i = 0; i < iir->nb_ab[0]; i++) { |
524 |
|
|
double mag; |
525 |
|
|
|
526 |
|
|
if (isnan(iir->ab[0][2 * i]) || isnan(iir->ab[0][2 * i + 1])) |
527 |
|
|
continue; |
528 |
|
|
mag = hypot(iir->ab[0][2 * i], iir->ab[0][2 * i + 1]); |
529 |
|
|
|
530 |
|
|
if (mag > max_mag) { |
531 |
|
|
max_mag = mag; |
532 |
|
|
outmost_pole.a = i; |
533 |
|
|
} |
534 |
|
|
} |
535 |
|
|
|
536 |
|
|
for (i = 0; i < iir->nb_ab[0]; i++) { |
537 |
|
|
if (isnan(iir->ab[0][2 * i]) || isnan(iir->ab[0][2 * i + 1])) |
538 |
|
|
continue; |
539 |
|
|
|
540 |
|
|
if (iir->ab[0][2 * i ] == iir->ab[0][2 * outmost_pole.a ] && |
541 |
|
|
iir->ab[0][2 * i + 1] == -iir->ab[0][2 * outmost_pole.a + 1]) { |
542 |
|
|
outmost_pole.b = i; |
543 |
|
|
break; |
544 |
|
|
} |
545 |
|
|
} |
546 |
|
|
|
547 |
|
|
av_log(ctx, AV_LOG_VERBOSE, "outmost_pole is %d.%d\n", outmost_pole.a, outmost_pole.b); |
548 |
|
|
|
549 |
|
|
if (outmost_pole.a < 0 || outmost_pole.b < 0) |
550 |
|
|
return AVERROR(EINVAL); |
551 |
|
|
|
552 |
|
|
for (i = 0; i < iir->nb_ab[1]; i++) { |
553 |
|
|
double distance; |
554 |
|
|
|
555 |
|
|
if (isnan(iir->ab[1][2 * i]) || isnan(iir->ab[1][2 * i + 1])) |
556 |
|
|
continue; |
557 |
|
|
distance = hypot(iir->ab[0][2 * outmost_pole.a ] - iir->ab[1][2 * i ], |
558 |
|
|
iir->ab[0][2 * outmost_pole.a + 1] - iir->ab[1][2 * i + 1]); |
559 |
|
|
|
560 |
|
|
if (distance < min_distance) { |
561 |
|
|
min_distance = distance; |
562 |
|
|
nearest_zero.a = i; |
563 |
|
|
} |
564 |
|
|
} |
565 |
|
|
|
566 |
|
|
for (i = 0; i < iir->nb_ab[1]; i++) { |
567 |
|
|
if (isnan(iir->ab[1][2 * i]) || isnan(iir->ab[1][2 * i + 1])) |
568 |
|
|
continue; |
569 |
|
|
|
570 |
|
|
if (iir->ab[1][2 * i ] == iir->ab[1][2 * nearest_zero.a ] && |
571 |
|
|
iir->ab[1][2 * i + 1] == -iir->ab[1][2 * nearest_zero.a + 1]) { |
572 |
|
|
nearest_zero.b = i; |
573 |
|
|
break; |
574 |
|
|
} |
575 |
|
|
} |
576 |
|
|
|
577 |
|
|
av_log(ctx, AV_LOG_VERBOSE, "nearest_zero is %d.%d\n", nearest_zero.a, nearest_zero.b); |
578 |
|
|
|
579 |
|
|
if (nearest_zero.a < 0 || nearest_zero.b < 0) |
580 |
|
|
return AVERROR(EINVAL); |
581 |
|
|
|
582 |
|
|
poles[0] = iir->ab[0][2 * outmost_pole.a ]; |
583 |
|
|
poles[1] = iir->ab[0][2 * outmost_pole.a + 1]; |
584 |
|
|
|
585 |
|
|
zeros[0] = iir->ab[1][2 * nearest_zero.a ]; |
586 |
|
|
zeros[1] = iir->ab[1][2 * nearest_zero.a + 1]; |
587 |
|
|
|
588 |
|
|
if (nearest_zero.a == nearest_zero.b && outmost_pole.a == outmost_pole.b) { |
589 |
|
|
zeros[2] = 0; |
590 |
|
|
zeros[3] = 0; |
591 |
|
|
|
592 |
|
|
poles[2] = 0; |
593 |
|
|
poles[3] = 0; |
594 |
|
|
} else { |
595 |
|
|
poles[2] = iir->ab[0][2 * outmost_pole.b ]; |
596 |
|
|
poles[3] = iir->ab[0][2 * outmost_pole.b + 1]; |
597 |
|
|
|
598 |
|
|
zeros[2] = iir->ab[1][2 * nearest_zero.b ]; |
599 |
|
|
zeros[3] = iir->ab[1][2 * nearest_zero.b + 1]; |
600 |
|
|
} |
601 |
|
|
|
602 |
|
|
ret = expand(ctx, zeros, 2, b); |
603 |
|
|
if (ret < 0) |
604 |
|
|
return ret; |
605 |
|
|
|
606 |
|
|
ret = expand(ctx, poles, 2, a); |
607 |
|
|
if (ret < 0) |
608 |
|
|
return ret; |
609 |
|
|
|
610 |
|
|
iir->ab[0][2 * outmost_pole.a] = iir->ab[0][2 * outmost_pole.a + 1] = NAN; |
611 |
|
|
iir->ab[0][2 * outmost_pole.b] = iir->ab[0][2 * outmost_pole.b + 1] = NAN; |
612 |
|
|
iir->ab[1][2 * nearest_zero.a] = iir->ab[1][2 * nearest_zero.a + 1] = NAN; |
613 |
|
|
iir->ab[1][2 * nearest_zero.b] = iir->ab[1][2 * nearest_zero.b + 1] = NAN; |
614 |
|
|
|
615 |
|
|
iir->biquads[current_biquad].a[0] = 1.; |
616 |
|
|
iir->biquads[current_biquad].a[1] = a[2] / a[4]; |
617 |
|
|
iir->biquads[current_biquad].a[2] = a[0] / a[4]; |
618 |
|
|
iir->biquads[current_biquad].b[0] = b[4] / a[4]; |
619 |
|
|
iir->biquads[current_biquad].b[1] = b[2] / a[4]; |
620 |
|
|
iir->biquads[current_biquad].b[2] = b[0] / a[4]; |
621 |
|
|
|
622 |
|
|
if (s->normalize && |
623 |
|
|
fabs(iir->biquads[current_biquad].b[0] + |
624 |
|
|
iir->biquads[current_biquad].b[1] + |
625 |
|
|
iir->biquads[current_biquad].b[2]) > 1e-6) { |
626 |
|
|
factor = (iir->biquads[current_biquad].a[0] + |
627 |
|
|
iir->biquads[current_biquad].a[1] + |
628 |
|
|
iir->biquads[current_biquad].a[2]) / |
629 |
|
|
(iir->biquads[current_biquad].b[0] + |
630 |
|
|
iir->biquads[current_biquad].b[1] + |
631 |
|
|
iir->biquads[current_biquad].b[2]); |
632 |
|
|
|
633 |
|
|
av_log(ctx, AV_LOG_VERBOSE, "factor=%f\n", factor); |
634 |
|
|
|
635 |
|
|
iir->biquads[current_biquad].b[0] *= factor; |
636 |
|
|
iir->biquads[current_biquad].b[1] *= factor; |
637 |
|
|
iir->biquads[current_biquad].b[2] *= factor; |
638 |
|
|
} |
639 |
|
|
|
640 |
|
|
iir->biquads[current_biquad].b[0] *= (current_biquad ? 1.0 : iir->g); |
641 |
|
|
iir->biquads[current_biquad].b[1] *= (current_biquad ? 1.0 : iir->g); |
642 |
|
|
iir->biquads[current_biquad].b[2] *= (current_biquad ? 1.0 : iir->g); |
643 |
|
|
|
644 |
|
|
av_log(ctx, AV_LOG_VERBOSE, "a=%f %f %f:b=%f %f %f\n", |
645 |
|
|
iir->biquads[current_biquad].a[0], |
646 |
|
|
iir->biquads[current_biquad].a[1], |
647 |
|
|
iir->biquads[current_biquad].a[2], |
648 |
|
|
iir->biquads[current_biquad].b[0], |
649 |
|
|
iir->biquads[current_biquad].b[1], |
650 |
|
|
iir->biquads[current_biquad].b[2]); |
651 |
|
|
|
652 |
|
|
current_biquad++; |
653 |
|
|
} |
654 |
|
|
} |
655 |
|
|
|
656 |
|
|
return 0; |
657 |
|
|
} |
658 |
|
|
|
659 |
|
|
static void convert_pr2zp(AVFilterContext *ctx, int channels) |
660 |
|
|
{ |
661 |
|
|
AudioIIRContext *s = ctx->priv; |
662 |
|
|
int ch; |
663 |
|
|
|
664 |
|
|
for (ch = 0; ch < channels; ch++) { |
665 |
|
|
IIRChannel *iir = &s->iir[ch]; |
666 |
|
|
int n; |
667 |
|
|
|
668 |
|
|
for (n = 0; n < iir->nb_ab[0]; n++) { |
669 |
|
|
double r = iir->ab[0][2*n]; |
670 |
|
|
double angle = iir->ab[0][2*n+1]; |
671 |
|
|
|
672 |
|
|
iir->ab[0][2*n] = r * cos(angle); |
673 |
|
|
iir->ab[0][2*n+1] = r * sin(angle); |
674 |
|
|
} |
675 |
|
|
|
676 |
|
|
for (n = 0; n < iir->nb_ab[1]; n++) { |
677 |
|
|
double r = iir->ab[1][2*n]; |
678 |
|
|
double angle = iir->ab[1][2*n+1]; |
679 |
|
|
|
680 |
|
|
iir->ab[1][2*n] = r * cos(angle); |
681 |
|
|
iir->ab[1][2*n+1] = r * sin(angle); |
682 |
|
|
} |
683 |
|
|
} |
684 |
|
|
} |
685 |
|
|
|
686 |
|
|
static void convert_sp2zp(AVFilterContext *ctx, int channels) |
687 |
|
|
{ |
688 |
|
|
AudioIIRContext *s = ctx->priv; |
689 |
|
|
int ch; |
690 |
|
|
|
691 |
|
|
for (ch = 0; ch < channels; ch++) { |
692 |
|
|
IIRChannel *iir = &s->iir[ch]; |
693 |
|
|
int n; |
694 |
|
|
|
695 |
|
|
for (n = 0; n < iir->nb_ab[0]; n++) { |
696 |
|
|
double sr = iir->ab[0][2*n]; |
697 |
|
|
double si = iir->ab[0][2*n+1]; |
698 |
|
|
double snr = 1. + sr; |
699 |
|
|
double sdr = 1. - sr; |
700 |
|
|
double div = sdr * sdr + si * si; |
701 |
|
|
|
702 |
|
|
iir->ab[0][2*n] = (snr * sdr - si * si) / div; |
703 |
|
|
iir->ab[0][2*n+1] = (sdr * si + snr * si) / div; |
704 |
|
|
} |
705 |
|
|
|
706 |
|
|
for (n = 0; n < iir->nb_ab[1]; n++) { |
707 |
|
|
double sr = iir->ab[1][2*n]; |
708 |
|
|
double si = iir->ab[1][2*n+1]; |
709 |
|
|
double snr = 1. + sr; |
710 |
|
|
double sdr = 1. - sr; |
711 |
|
|
double div = sdr * sdr + si * si; |
712 |
|
|
|
713 |
|
|
iir->ab[1][2*n] = (snr * sdr - si * si) / div; |
714 |
|
|
iir->ab[1][2*n+1] = (sdr * si + snr * si) / div; |
715 |
|
|
} |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
|
719 |
|
|
static void convert_pd2zp(AVFilterContext *ctx, int channels) |
720 |
|
|
{ |
721 |
|
|
AudioIIRContext *s = ctx->priv; |
722 |
|
|
int ch; |
723 |
|
|
|
724 |
|
|
for (ch = 0; ch < channels; ch++) { |
725 |
|
|
IIRChannel *iir = &s->iir[ch]; |
726 |
|
|
int n; |
727 |
|
|
|
728 |
|
|
for (n = 0; n < iir->nb_ab[0]; n++) { |
729 |
|
|
double r = iir->ab[0][2*n]; |
730 |
|
|
double angle = M_PI*iir->ab[0][2*n+1]/180.; |
731 |
|
|
|
732 |
|
|
iir->ab[0][2*n] = r * cos(angle); |
733 |
|
|
iir->ab[0][2*n+1] = r * sin(angle); |
734 |
|
|
} |
735 |
|
|
|
736 |
|
|
for (n = 0; n < iir->nb_ab[1]; n++) { |
737 |
|
|
double r = iir->ab[1][2*n]; |
738 |
|
|
double angle = M_PI*iir->ab[1][2*n+1]/180.; |
739 |
|
|
|
740 |
|
|
iir->ab[1][2*n] = r * cos(angle); |
741 |
|
|
iir->ab[1][2*n+1] = r * sin(angle); |
742 |
|
|
} |
743 |
|
|
} |
744 |
|
|
} |
745 |
|
|
|
746 |
|
|
static void check_stability(AVFilterContext *ctx, int channels) |
747 |
|
|
{ |
748 |
|
|
AudioIIRContext *s = ctx->priv; |
749 |
|
|
int ch; |
750 |
|
|
|
751 |
|
|
for (ch = 0; ch < channels; ch++) { |
752 |
|
|
IIRChannel *iir = &s->iir[ch]; |
753 |
|
|
|
754 |
|
|
for (int n = 0; n < iir->nb_ab[0]; n++) { |
755 |
|
|
double pr = hypot(iir->ab[0][2*n], iir->ab[0][2*n+1]); |
756 |
|
|
|
757 |
|
|
if (pr >= 1.) { |
758 |
|
|
av_log(ctx, AV_LOG_WARNING, "pole %d at channel %d is unstable\n", n, ch); |
759 |
|
|
break; |
760 |
|
|
} |
761 |
|
|
} |
762 |
|
|
} |
763 |
|
|
} |
764 |
|
|
|
765 |
|
|
static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color) |
766 |
|
|
{ |
767 |
|
|
const uint8_t *font; |
768 |
|
|
int font_height; |
769 |
|
|
int i; |
770 |
|
|
|
771 |
|
|
font = avpriv_cga_font, font_height = 8; |
772 |
|
|
|
773 |
|
|
for (i = 0; txt[i]; i++) { |
774 |
|
|
int char_y, mask; |
775 |
|
|
|
776 |
|
|
uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4; |
777 |
|
|
for (char_y = 0; char_y < font_height; char_y++) { |
778 |
|
|
for (mask = 0x80; mask; mask >>= 1) { |
779 |
|
|
if (font[txt[i] * font_height + char_y] & mask) |
780 |
|
|
AV_WL32(p, color); |
781 |
|
|
p += 4; |
782 |
|
|
} |
783 |
|
|
p += pic->linesize[0] - 8 * 4; |
784 |
|
|
} |
785 |
|
|
} |
786 |
|
|
} |
787 |
|
|
|
788 |
|
|
static void draw_line(AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color) |
789 |
|
|
{ |
790 |
|
|
int dx = FFABS(x1-x0); |
791 |
|
|
int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1; |
792 |
|
|
int err = (dx>dy ? dx : -dy) / 2, e2; |
793 |
|
|
|
794 |
|
|
for (;;) { |
795 |
|
|
AV_WL32(out->data[0] + y0 * out->linesize[0] + x0 * 4, color); |
796 |
|
|
|
797 |
|
|
if (x0 == x1 && y0 == y1) |
798 |
|
|
break; |
799 |
|
|
|
800 |
|
|
e2 = err; |
801 |
|
|
|
802 |
|
|
if (e2 >-dx) { |
803 |
|
|
err -= dy; |
804 |
|
|
x0--; |
805 |
|
|
} |
806 |
|
|
|
807 |
|
|
if (e2 < dy) { |
808 |
|
|
err += dx; |
809 |
|
|
y0 += sy; |
810 |
|
|
} |
811 |
|
|
} |
812 |
|
|
} |
813 |
|
|
|
814 |
|
|
static double distance(double x0, double x1, double y0, double y1) |
815 |
|
|
{ |
816 |
|
|
return hypot(x0 - x1, y0 - y1); |
817 |
|
|
} |
818 |
|
|
|
819 |
|
|
static void get_response(int channel, int format, double w, |
820 |
|
|
const double *b, const double *a, |
821 |
|
|
int nb_b, int nb_a, double *magnitude, double *phase) |
822 |
|
|
{ |
823 |
|
|
double realz, realp; |
824 |
|
|
double imagz, imagp; |
825 |
|
|
double real, imag; |
826 |
|
|
double div; |
827 |
|
|
|
828 |
|
|
if (format == 0) { |
829 |
|
|
realz = 0., realp = 0.; |
830 |
|
|
imagz = 0., imagp = 0.; |
831 |
|
|
for (int x = 0; x < nb_a; x++) { |
832 |
|
|
realz += cos(-x * w) * a[x]; |
833 |
|
|
imagz += sin(-x * w) * a[x]; |
834 |
|
|
} |
835 |
|
|
|
836 |
|
|
for (int x = 0; x < nb_b; x++) { |
837 |
|
|
realp += cos(-x * w) * b[x]; |
838 |
|
|
imagp += sin(-x * w) * b[x]; |
839 |
|
|
} |
840 |
|
|
|
841 |
|
|
div = realp * realp + imagp * imagp; |
842 |
|
|
real = (realz * realp + imagz * imagp) / div; |
843 |
|
|
imag = (imagz * realp - imagp * realz) / div; |
844 |
|
|
|
845 |
|
|
*magnitude = hypot(real, imag); |
846 |
|
|
*phase = atan2(imag, real); |
847 |
|
|
} else { |
848 |
|
|
double p = 1., z = 1.; |
849 |
|
|
double acc = 0.; |
850 |
|
|
|
851 |
|
|
for (int x = 0; x < nb_a; x++) { |
852 |
|
|
z *= distance(cos(w), a[2 * x], sin(w), a[2 * x + 1]); |
853 |
|
|
acc += atan2(sin(w) - a[2 * x + 1], cos(w) - a[2 * x]); |
854 |
|
|
} |
855 |
|
|
|
856 |
|
|
for (int x = 0; x < nb_b; x++) { |
857 |
|
|
p *= distance(cos(w), b[2 * x], sin(w), b[2 * x + 1]); |
858 |
|
|
acc -= atan2(sin(w) - b[2 * x + 1], cos(w) - b[2 * x]); |
859 |
|
|
} |
860 |
|
|
|
861 |
|
|
*magnitude = z / p; |
862 |
|
|
*phase = acc; |
863 |
|
|
} |
864 |
|
|
} |
865 |
|
|
|
866 |
|
|
static void draw_response(AVFilterContext *ctx, AVFrame *out, int sample_rate) |
867 |
|
|
{ |
868 |
|
|
AudioIIRContext *s = ctx->priv; |
869 |
|
|
double *mag, *phase, *temp, *delay, min = DBL_MAX, max = -DBL_MAX; |
870 |
|
|
double min_delay = DBL_MAX, max_delay = -DBL_MAX, min_phase, max_phase; |
871 |
|
|
int prev_ymag = -1, prev_yphase = -1, prev_ydelay = -1; |
872 |
|
|
char text[32]; |
873 |
|
|
int ch, i; |
874 |
|
|
|
875 |
|
|
memset(out->data[0], 0, s->h * out->linesize[0]); |
876 |
|
|
|
877 |
|
|
phase = av_malloc_array(s->w, sizeof(*phase)); |
878 |
|
|
temp = av_malloc_array(s->w, sizeof(*temp)); |
879 |
|
|
mag = av_malloc_array(s->w, sizeof(*mag)); |
880 |
|
|
delay = av_malloc_array(s->w, sizeof(*delay)); |
881 |
|
|
if (!mag || !phase || !delay || !temp) |
882 |
|
|
goto end; |
883 |
|
|
|
884 |
|
|
ch = av_clip(s->ir_channel, 0, s->channels - 1); |
885 |
|
|
for (i = 0; i < s->w; i++) { |
886 |
|
|
const double *b = s->iir[ch].ab[0]; |
887 |
|
|
const double *a = s->iir[ch].ab[1]; |
888 |
|
|
const int nb_b = s->iir[ch].nb_ab[0]; |
889 |
|
|
const int nb_a = s->iir[ch].nb_ab[1]; |
890 |
|
|
double w = i * M_PI / (s->w - 1); |
891 |
|
|
double m, p; |
892 |
|
|
|
893 |
|
|
get_response(ch, s->format, w, b, a, nb_b, nb_a, &m, &p); |
894 |
|
|
|
895 |
|
|
mag[i] = s->iir[ch].g * m; |
896 |
|
|
phase[i] = p; |
897 |
|
|
min = fmin(min, mag[i]); |
898 |
|
|
max = fmax(max, mag[i]); |
899 |
|
|
} |
900 |
|
|
|
901 |
|
|
temp[0] = 0.; |
902 |
|
|
for (i = 0; i < s->w - 1; i++) { |
903 |
|
|
double d = phase[i] - phase[i + 1]; |
904 |
|
|
temp[i + 1] = ceil(fabs(d) / (2. * M_PI)) * 2. * M_PI * ((d > M_PI) - (d < -M_PI)); |
905 |
|
|
} |
906 |
|
|
|
907 |
|
|
min_phase = phase[0]; |
908 |
|
|
max_phase = phase[0]; |
909 |
|
|
for (i = 1; i < s->w; i++) { |
910 |
|
|
temp[i] += temp[i - 1]; |
911 |
|
|
phase[i] += temp[i]; |
912 |
|
|
min_phase = fmin(min_phase, phase[i]); |
913 |
|
|
max_phase = fmax(max_phase, phase[i]); |
914 |
|
|
} |
915 |
|
|
|
916 |
|
|
for (i = 0; i < s->w - 1; i++) { |
917 |
|
|
double div = s->w / (double)sample_rate; |
918 |
|
|
|
919 |
|
|
delay[i + 1] = -(phase[i] - phase[i + 1]) / div; |
920 |
|
|
min_delay = fmin(min_delay, delay[i + 1]); |
921 |
|
|
max_delay = fmax(max_delay, delay[i + 1]); |
922 |
|
|
} |
923 |
|
|
delay[0] = delay[1]; |
924 |
|
|
|
925 |
|
|
for (i = 0; i < s->w; i++) { |
926 |
|
|
int ymag = mag[i] / max * (s->h - 1); |
927 |
|
|
int ydelay = (delay[i] - min_delay) / (max_delay - min_delay) * (s->h - 1); |
928 |
|
|
int yphase = (phase[i] - min_phase) / (max_phase - min_phase) * (s->h - 1); |
929 |
|
|
|
930 |
|
|
ymag = s->h - 1 - av_clip(ymag, 0, s->h - 1); |
931 |
|
|
yphase = s->h - 1 - av_clip(yphase, 0, s->h - 1); |
932 |
|
|
ydelay = s->h - 1 - av_clip(ydelay, 0, s->h - 1); |
933 |
|
|
|
934 |
|
|
if (prev_ymag < 0) |
935 |
|
|
prev_ymag = ymag; |
936 |
|
|
if (prev_yphase < 0) |
937 |
|
|
prev_yphase = yphase; |
938 |
|
|
if (prev_ydelay < 0) |
939 |
|
|
prev_ydelay = ydelay; |
940 |
|
|
|
941 |
|
|
draw_line(out, i, ymag, FFMAX(i - 1, 0), prev_ymag, 0xFFFF00FF); |
942 |
|
|
draw_line(out, i, yphase, FFMAX(i - 1, 0), prev_yphase, 0xFF00FF00); |
943 |
|
|
draw_line(out, i, ydelay, FFMAX(i - 1, 0), prev_ydelay, 0xFF00FFFF); |
944 |
|
|
|
945 |
|
|
prev_ymag = ymag; |
946 |
|
|
prev_yphase = yphase; |
947 |
|
|
prev_ydelay = ydelay; |
948 |
|
|
} |
949 |
|
|
|
950 |
|
|
if (s->w > 400 && s->h > 100) { |
951 |
|
|
drawtext(out, 2, 2, "Max Magnitude:", 0xDDDDDDDD); |
952 |
|
|
snprintf(text, sizeof(text), "%.2f", max); |
953 |
|
|
drawtext(out, 15 * 8 + 2, 2, text, 0xDDDDDDDD); |
954 |
|
|
|
955 |
|
|
drawtext(out, 2, 12, "Min Magnitude:", 0xDDDDDDDD); |
956 |
|
|
snprintf(text, sizeof(text), "%.2f", min); |
957 |
|
|
drawtext(out, 15 * 8 + 2, 12, text, 0xDDDDDDDD); |
958 |
|
|
|
959 |
|
|
drawtext(out, 2, 22, "Max Phase:", 0xDDDDDDDD); |
960 |
|
|
snprintf(text, sizeof(text), "%.2f", max_phase); |
961 |
|
|
drawtext(out, 15 * 8 + 2, 22, text, 0xDDDDDDDD); |
962 |
|
|
|
963 |
|
|
drawtext(out, 2, 32, "Min Phase:", 0xDDDDDDDD); |
964 |
|
|
snprintf(text, sizeof(text), "%.2f", min_phase); |
965 |
|
|
drawtext(out, 15 * 8 + 2, 32, text, 0xDDDDDDDD); |
966 |
|
|
|
967 |
|
|
drawtext(out, 2, 42, "Max Delay:", 0xDDDDDDDD); |
968 |
|
|
snprintf(text, sizeof(text), "%.2f", max_delay); |
969 |
|
|
drawtext(out, 11 * 8 + 2, 42, text, 0xDDDDDDDD); |
970 |
|
|
|
971 |
|
|
drawtext(out, 2, 52, "Min Delay:", 0xDDDDDDDD); |
972 |
|
|
snprintf(text, sizeof(text), "%.2f", min_delay); |
973 |
|
|
drawtext(out, 11 * 8 + 2, 52, text, 0xDDDDDDDD); |
974 |
|
|
} |
975 |
|
|
|
976 |
|
|
end: |
977 |
|
|
av_free(delay); |
978 |
|
|
av_free(temp); |
979 |
|
|
av_free(phase); |
980 |
|
|
av_free(mag); |
981 |
|
|
} |
982 |
|
|
|
983 |
|
|
static int config_output(AVFilterLink *outlink) |
984 |
|
|
{ |
985 |
|
|
AVFilterContext *ctx = outlink->src; |
986 |
|
|
AudioIIRContext *s = ctx->priv; |
987 |
|
|
AVFilterLink *inlink = ctx->inputs[0]; |
988 |
|
|
int ch, ret, i; |
989 |
|
|
|
990 |
|
|
s->channels = inlink->channels; |
991 |
|
|
s->iir = av_calloc(s->channels, sizeof(*s->iir)); |
992 |
|
|
if (!s->iir) |
993 |
|
|
return AVERROR(ENOMEM); |
994 |
|
|
|
995 |
|
|
ret = read_gains(ctx, s->g_str, inlink->channels); |
996 |
|
|
if (ret < 0) |
997 |
|
|
return ret; |
998 |
|
|
|
999 |
|
|
ret = read_channels(ctx, inlink->channels, s->a_str, 0); |
1000 |
|
|
if (ret < 0) |
1001 |
|
|
return ret; |
1002 |
|
|
|
1003 |
|
|
ret = read_channels(ctx, inlink->channels, s->b_str, 1); |
1004 |
|
|
if (ret < 0) |
1005 |
|
|
return ret; |
1006 |
|
|
|
1007 |
|
|
if (s->format == 2) { |
1008 |
|
|
convert_pr2zp(ctx, inlink->channels); |
1009 |
|
|
} else if (s->format == 3) { |
1010 |
|
|
convert_pd2zp(ctx, inlink->channels); |
1011 |
|
|
} else if (s->format == 4) { |
1012 |
|
|
convert_sp2zp(ctx, inlink->channels); |
1013 |
|
|
} |
1014 |
|
|
if (s->format > 0) { |
1015 |
|
|
check_stability(ctx, inlink->channels); |
1016 |
|
|
} |
1017 |
|
|
|
1018 |
|
|
av_frame_free(&s->video); |
1019 |
|
|
if (s->response) { |
1020 |
|
|
s->video = ff_get_video_buffer(ctx->outputs[1], s->w, s->h); |
1021 |
|
|
if (!s->video) |
1022 |
|
|
return AVERROR(ENOMEM); |
1023 |
|
|
|
1024 |
|
|
draw_response(ctx, s->video, inlink->sample_rate); |
1025 |
|
|
} |
1026 |
|
|
|
1027 |
|
|
if (s->format == 0) |
1028 |
|
|
av_log(ctx, AV_LOG_WARNING, "tf coefficients format is not recommended for too high number of zeros/poles.\n"); |
1029 |
|
|
|
1030 |
|
|
if (s->format > 0 && s->process == 0) { |
1031 |
|
|
av_log(ctx, AV_LOG_WARNING, "Direct processsing is not recommended for zp coefficients format.\n"); |
1032 |
|
|
|
1033 |
|
|
ret = convert_zp2tf(ctx, inlink->channels); |
1034 |
|
|
if (ret < 0) |
1035 |
|
|
return ret; |
1036 |
|
|
} else if (s->format == 0 && s->process == 1) { |
1037 |
|
|
av_log(ctx, AV_LOG_ERROR, "Serial cascading is not implemented for transfer function.\n"); |
1038 |
|
|
return AVERROR_PATCHWELCOME; |
1039 |
|
|
} else if (s->format > 0 && s->process == 1) { |
1040 |
|
|
if (inlink->format == AV_SAMPLE_FMT_S16P) |
1041 |
|
|
av_log(ctx, AV_LOG_WARNING, "Serial cascading is not recommended for i16 precision.\n"); |
1042 |
|
|
|
1043 |
|
|
ret = decompose_zp2biquads(ctx, inlink->channels); |
1044 |
|
|
if (ret < 0) |
1045 |
|
|
return ret; |
1046 |
|
|
} |
1047 |
|
|
|
1048 |
|
|
for (ch = 0; s->format == 0 && ch < inlink->channels; ch++) { |
1049 |
|
|
IIRChannel *iir = &s->iir[ch]; |
1050 |
|
|
|
1051 |
|
|
for (i = 1; i < iir->nb_ab[0]; i++) { |
1052 |
|
|
iir->ab[0][i] /= iir->ab[0][0]; |
1053 |
|
|
} |
1054 |
|
|
|
1055 |
|
|
iir->ab[0][0] = 1.0; |
1056 |
|
|
for (i = 0; i < iir->nb_ab[1]; i++) { |
1057 |
|
|
iir->ab[1][i] *= iir->g; |
1058 |
|
|
} |
1059 |
|
|
|
1060 |
|
|
normalize_coeffs(ctx, ch); |
1061 |
|
|
} |
1062 |
|
|
|
1063 |
|
|
switch (inlink->format) { |
1064 |
|
|
case AV_SAMPLE_FMT_DBLP: s->iir_channel = s->process == 1 ? iir_ch_serial_dblp : iir_ch_dblp; break; |
1065 |
|
|
case AV_SAMPLE_FMT_FLTP: s->iir_channel = s->process == 1 ? iir_ch_serial_fltp : iir_ch_fltp; break; |
1066 |
|
|
case AV_SAMPLE_FMT_S32P: s->iir_channel = s->process == 1 ? iir_ch_serial_s32p : iir_ch_s32p; break; |
1067 |
|
|
case AV_SAMPLE_FMT_S16P: s->iir_channel = s->process == 1 ? iir_ch_serial_s16p : iir_ch_s16p; break; |
1068 |
|
|
} |
1069 |
|
|
|
1070 |
|
|
return 0; |
1071 |
|
|
} |
1072 |
|
|
|
1073 |
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
1074 |
|
|
{ |
1075 |
|
|
AVFilterContext *ctx = inlink->dst; |
1076 |
|
|
AudioIIRContext *s = ctx->priv; |
1077 |
|
|
AVFilterLink *outlink = ctx->outputs[0]; |
1078 |
|
|
ThreadData td; |
1079 |
|
|
AVFrame *out; |
1080 |
|
|
int ch, ret; |
1081 |
|
|
|
1082 |
|
|
if (av_frame_is_writable(in)) { |
1083 |
|
|
out = in; |
1084 |
|
|
} else { |
1085 |
|
|
out = ff_get_audio_buffer(outlink, in->nb_samples); |
1086 |
|
|
if (!out) { |
1087 |
|
|
av_frame_free(&in); |
1088 |
|
|
return AVERROR(ENOMEM); |
1089 |
|
|
} |
1090 |
|
|
av_frame_copy_props(out, in); |
1091 |
|
|
} |
1092 |
|
|
|
1093 |
|
|
td.in = in; |
1094 |
|
|
td.out = out; |
1095 |
|
|
ctx->internal->execute(ctx, s->iir_channel, &td, NULL, outlink->channels); |
1096 |
|
|
|
1097 |
|
|
for (ch = 0; ch < outlink->channels; ch++) { |
1098 |
|
|
if (s->iir[ch].clippings > 0) |
1099 |
|
|
av_log(ctx, AV_LOG_WARNING, "Channel %d clipping %d times. Please reduce gain.\n", |
1100 |
|
|
ch, s->iir[ch].clippings); |
1101 |
|
|
s->iir[ch].clippings = 0; |
1102 |
|
|
} |
1103 |
|
|
|
1104 |
|
|
if (in != out) |
1105 |
|
|
av_frame_free(&in); |
1106 |
|
|
|
1107 |
|
|
if (s->response) { |
1108 |
|
|
AVFilterLink *outlink = ctx->outputs[1]; |
1109 |
|
|
int64_t old_pts = s->video->pts; |
1110 |
|
|
int64_t new_pts = av_rescale_q(out->pts, ctx->inputs[0]->time_base, outlink->time_base); |
1111 |
|
|
|
1112 |
|
|
if (new_pts > old_pts) { |
1113 |
|
|
AVFrame *clone; |
1114 |
|
|
|
1115 |
|
|
s->video->pts = new_pts; |
1116 |
|
|
clone = av_frame_clone(s->video); |
1117 |
|
|
if (!clone) |
1118 |
|
|
return AVERROR(ENOMEM); |
1119 |
|
|
ret = ff_filter_frame(outlink, clone); |
1120 |
|
|
if (ret < 0) |
1121 |
|
|
return ret; |
1122 |
|
|
} |
1123 |
|
|
} |
1124 |
|
|
|
1125 |
|
|
return ff_filter_frame(outlink, out); |
1126 |
|
|
} |
1127 |
|
|
|
1128 |
|
|
static int config_video(AVFilterLink *outlink) |
1129 |
|
|
{ |
1130 |
|
|
AVFilterContext *ctx = outlink->src; |
1131 |
|
|
AudioIIRContext *s = ctx->priv; |
1132 |
|
|
|
1133 |
|
|
outlink->sample_aspect_ratio = (AVRational){1,1}; |
1134 |
|
|
outlink->w = s->w; |
1135 |
|
|
outlink->h = s->h; |
1136 |
|
|
outlink->frame_rate = s->rate; |
1137 |
|
|
outlink->time_base = av_inv_q(outlink->frame_rate); |
1138 |
|
|
|
1139 |
|
|
return 0; |
1140 |
|
|
} |
1141 |
|
|
|
1142 |
|
|
static av_cold int init(AVFilterContext *ctx) |
1143 |
|
|
{ |
1144 |
|
|
AudioIIRContext *s = ctx->priv; |
1145 |
|
|
AVFilterPad pad, vpad; |
1146 |
|
|
int ret; |
1147 |
|
|
|
1148 |
|
|
if (!s->a_str || !s->b_str || !s->g_str) { |
1149 |
|
|
av_log(ctx, AV_LOG_ERROR, "Valid coefficients are mandatory.\n"); |
1150 |
|
|
return AVERROR(EINVAL); |
1151 |
|
|
} |
1152 |
|
|
|
1153 |
|
|
switch (s->precision) { |
1154 |
|
|
case 0: s->sample_format = AV_SAMPLE_FMT_DBLP; break; |
1155 |
|
|
case 1: s->sample_format = AV_SAMPLE_FMT_FLTP; break; |
1156 |
|
|
case 2: s->sample_format = AV_SAMPLE_FMT_S32P; break; |
1157 |
|
|
case 3: s->sample_format = AV_SAMPLE_FMT_S16P; break; |
1158 |
|
|
default: return AVERROR_BUG; |
1159 |
|
|
} |
1160 |
|
|
|
1161 |
|
|
pad = (AVFilterPad){ |
1162 |
|
|
.name = "default", |
1163 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
1164 |
|
|
.config_props = config_output, |
1165 |
|
|
}; |
1166 |
|
|
|
1167 |
|
|
ret = ff_insert_outpad(ctx, 0, &pad); |
1168 |
|
|
if (ret < 0) |
1169 |
|
|
return ret; |
1170 |
|
|
|
1171 |
|
|
if (s->response) { |
1172 |
|
|
vpad = (AVFilterPad){ |
1173 |
|
|
.name = "filter_response", |
1174 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
1175 |
|
|
.config_props = config_video, |
1176 |
|
|
}; |
1177 |
|
|
|
1178 |
|
|
ret = ff_insert_outpad(ctx, 1, &vpad); |
1179 |
|
|
if (ret < 0) |
1180 |
|
|
return ret; |
1181 |
|
|
} |
1182 |
|
|
|
1183 |
|
|
return 0; |
1184 |
|
|
} |
1185 |
|
|
|
1186 |
|
|
static av_cold void uninit(AVFilterContext *ctx) |
1187 |
|
|
{ |
1188 |
|
|
AudioIIRContext *s = ctx->priv; |
1189 |
|
|
int ch; |
1190 |
|
|
|
1191 |
|
|
if (s->iir) { |
1192 |
|
|
for (ch = 0; ch < s->channels; ch++) { |
1193 |
|
|
IIRChannel *iir = &s->iir[ch]; |
1194 |
|
|
av_freep(&iir->ab[0]); |
1195 |
|
|
av_freep(&iir->ab[1]); |
1196 |
|
|
av_freep(&iir->cache[0]); |
1197 |
|
|
av_freep(&iir->cache[1]); |
1198 |
|
|
av_freep(&iir->biquads); |
1199 |
|
|
} |
1200 |
|
|
} |
1201 |
|
|
av_freep(&s->iir); |
1202 |
|
|
|
1203 |
|
|
av_frame_free(&s->video); |
1204 |
|
|
} |
1205 |
|
|
|
1206 |
|
|
static const AVFilterPad inputs[] = { |
1207 |
|
|
{ |
1208 |
|
|
.name = "default", |
1209 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
1210 |
|
|
.filter_frame = filter_frame, |
1211 |
|
|
}, |
1212 |
|
|
{ NULL } |
1213 |
|
|
}; |
1214 |
|
|
|
1215 |
|
|
#define OFFSET(x) offsetof(AudioIIRContext, x) |
1216 |
|
|
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
1217 |
|
|
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
1218 |
|
|
|
1219 |
|
|
static const AVOption aiir_options[] = { |
1220 |
|
|
{ "zeros", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF }, |
1221 |
|
|
{ "z", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF }, |
1222 |
|
|
{ "poles", "set A/denominator/poles coefficients", OFFSET(a_str),AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF }, |
1223 |
|
|
{ "p", "set A/denominator/poles coefficients", OFFSET(a_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF }, |
1224 |
|
|
{ "gains", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF }, |
1225 |
|
|
{ "k", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF }, |
1226 |
|
|
{ "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF }, |
1227 |
|
|
{ "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF }, |
1228 |
|
|
{ "format", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, AF, "format" }, |
1229 |
|
|
{ "f", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, AF, "format" }, |
1230 |
|
|
{ "tf", "digital transfer function", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "format" }, |
1231 |
|
|
{ "zp", "Z-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "format" }, |
1232 |
|
|
{ "pr", "Z-plane zeros/poles (polar radians)", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "format" }, |
1233 |
|
|
{ "pd", "Z-plane zeros/poles (polar degrees)", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "format" }, |
1234 |
|
|
{ "sp", "S-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, AF, "format" }, |
1235 |
|
|
{ "process", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "process" }, |
1236 |
|
|
{ "r", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "process" }, |
1237 |
|
|
{ "d", "direct", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "process" }, |
1238 |
|
|
{ "s", "serial cascading", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "process" }, |
1239 |
|
|
{ "precision", "set filtering precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" }, |
1240 |
|
|
{ "e", "set precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" }, |
1241 |
|
|
{ "dbl", "double-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" }, |
1242 |
|
|
{ "flt", "single-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" }, |
1243 |
|
|
{ "i32", "32-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" }, |
1244 |
|
|
{ "i16", "16-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "precision" }, |
1245 |
|
|
{ "normalize", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF }, |
1246 |
|
|
{ "n", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF }, |
1247 |
|
|
{ "mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF }, |
1248 |
|
|
{ "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF }, |
1249 |
|
|
{ "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF }, |
1250 |
|
|
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF }, |
1251 |
|
|
{ "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT32_MAX, VF }, |
1252 |
|
|
{ NULL }, |
1253 |
|
|
}; |
1254 |
|
|
|
1255 |
|
|
AVFILTER_DEFINE_CLASS(aiir); |
1256 |
|
|
|
1257 |
|
|
AVFilter ff_af_aiir = { |
1258 |
|
|
.name = "aiir", |
1259 |
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Infinite Impulse Response filter with supplied coefficients."), |
1260 |
|
|
.priv_size = sizeof(AudioIIRContext), |
1261 |
|
|
.priv_class = &aiir_class, |
1262 |
|
|
.init = init, |
1263 |
|
|
.uninit = uninit, |
1264 |
|
|
.query_formats = query_formats, |
1265 |
|
|
.inputs = inputs, |
1266 |
|
|
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | |
1267 |
|
|
AVFILTER_FLAG_SLICE_THREADS, |
1268 |
|
|
}; |