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/* Calf DSP plugin pack
* Equalization related plugins
*
* Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen and others
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02111-1307, USA.
*/
#ifndef CALF_MODULES_EQ_H
#define CALF_MODULES_EQ_H
#include <assert.h>
#include <limits.h>
#include "biquad.h"
#include "inertia.h"
#include "audio_fx.h"
#include "giface.h"
#include "metadata.h"
#include "plugin_tools.h"
namespace calf_plugins {
/// Equalizer N Band by Markus Schmidt (based on Krzysztof's filters)
template<class BaseClass, bool has_lphp>
class equalizerNband_audio_module: public audio_module<BaseClass>, public frequency_response_line_graph {
public:
typedef audio_module<BaseClass> AM;
using AM::ins;
using AM::outs;
using AM::params;
using AM::in_count;
using AM::out_count;
using AM::param_count;
using AM::PeakBands;
private:
enum { graph_param_count = BaseClass::last_graph_param - BaseClass::first_graph_param + 1, params_per_band = AM::param_p2_active - AM::param_p1_active };
float hp_mode_old, hp_freq_old;
float lp_mode_old, lp_freq_old;
float ls_level_old, ls_freq_old;
float hs_level_old, hs_freq_old;
float p_level_old[PeakBands], p_freq_old[PeakBands], p_q_old[PeakBands];
mutable float old_params_for_graph[graph_param_count];
dual_in_out_metering<BaseClass> meters;
CalfEqMode hp_mode, lp_mode;
dsp::biquad_d2<float> hp[3][2], lp[3][2];
dsp::biquad_d2<float> lsL, lsR, hsL, hsR;
dsp::biquad_d2<float> pL[PeakBands], pR[PeakBands];
inline void process_hplp(float &left, float &right);
public:
typedef std::complex<double> cfloat;
uint32_t srate;
bool is_active;
mutable volatile int last_generation, last_calculated_generation;
equalizerNband_audio_module();
void activate();
void deactivate();
void params_changed();
float freq_gain(int index, double freq, uint32_t sr) const;
void set_sample_rate(uint32_t sr)
{
srate = sr;
meters.set_sample_rate(sr);
}
uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
bool get_graph(int index, int subindex, float *data, int points, cairo_iface *context) const;
bool get_gridline(int index, int subindex, float &pos, bool &vertical, std::string &legend, cairo_iface *context) const;
int get_changed_offsets(int index, int generation, int &subindex_graph, int &subindex_dot, int &subindex_gridline) const;
};
typedef equalizerNband_audio_module<equalizer5band_metadata, false> equalizer5band_audio_module;
typedef equalizerNband_audio_module<equalizer8band_metadata, true> equalizer8band_audio_module;
typedef equalizerNband_audio_module<equalizer12band_metadata, true> equalizer12band_audio_module;
};
#endif
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