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/*
* Copyright (C) 2025 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2025 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-plugins-ringmod-sc
* Created on: 29 авг 2025 г.
*
* lsp-plugins-ringmod-sc 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 3 of the License, or
* any later version.
*
* lsp-plugins-ringmod-sc 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 lsp-plugins-ringmod-sc. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PRIVATE_PLUGINS_RINGMOD_SC_H_
#define PRIVATE_PLUGINS_RINGMOD_SC_H_
#include <lsp-plug.in/dsp-units/ctl/Bypass.h>
#include <lsp-plug.in/dsp-units/util/Delay.h>
#include <lsp-plug.in/dsp-units/util/MeterGraph.h>
#include <lsp-plug.in/dsp-units/util/RingBuffer.h>
#include <lsp-plug.in/plug-fw/plug.h>
#include <lsp-plug.in/plug-fw/core/IDBuffer.h>
#include <private/meta/ringmod_sc.h>
namespace lsp
{
namespace plugins
{
/**
* Base class for the latency compensation delay
*/
class ringmod_sc: public plug::Module
{
protected:
enum sc_type_t
{
SC_TYPE_INTERNAL,
SC_TYPE_EXTERNAL,
SC_TYPE_SHM_LINK,
};
enum sc_source_t
{
SC_SRC_LEFT_RIGHT,
SC_SRC_RIGHT_LEFT,
SC_SRC_LEFT,
SC_SRC_RIGHT,
SC_SRC_MID_SIDE,
SC_SRC_SIDE_MID,
SC_SRC_MIDDLE,
SC_SRC_SIDE,
SC_SRC_MIN,
SC_SRC_MAX
};
enum meter_graph_t
{
MG_IN,
MG_SC,
MG_GAIN,
MG_OUT,
MG_TOTAL
};
typedef struct io_buffers_t
{
float *vIn;
float *vOut;
float *vScIn;
float *vShmIn;
float *vMixSc;
} io_buffers_t;
typedef struct premix_t
{
float fInToSc; // Input -> Sidechain mix
float fInToLink; // Input -> Link mix
float fLinkToIn; // Link -> Input mix
float fLinkToSc; // Link -> Sidechain mix
float fScToIn; // Sidechain -> Input mix
float fScToLink; // Sidechain -> Link mix
float *vIn[2]; // Input buffer
float *vOut[2]; // Output buffer
float *vSc[2]; // Sidechain buffer
float *vLink[2]; // Link buffer
float *vTmpIn[2]; // Replacement buffer for input
float *vTmpLink[2]; // Replacement buffer for link
float *vTmpSc[2]; // Replacement buffer for sidechain
plug::IPort *pInToSc; // Input -> Sidechain mix
plug::IPort *pInToLink; // Input -> Link mix
plug::IPort *pLinkToIn; // Link -> Input mix
plug::IPort *pLinkToSc; // Link -> Sidechain mix
plug::IPort *pScToIn; // Sidechain -> Input mix
plug::IPort *pScToLink; // Sidechain -> Link mix
} premix_t;
typedef struct channel_t
{
// DSP processing modules
dspu::Bypass sBypass; // Bypass
dspu::Delay sInDelay; // Input signal delay
dspu::Delay sScDelay; // Sidechain input delay
dspu::RingBuffer sEnvDelay; // Sidechain envelope delay buffer
dspu::MeterGraph vGraph[MG_TOTAL]; // Meter graphs
float fPeak; // Current sidechain peak value
uint32_t nHold; // Hold counter
bool vVisible[MG_TOTAL]; // Meter visibility
float vValues[MG_TOTAL]; // Meter values
float *vInData; // Input signal data
float *vBuffer; // Temporary data
// Ports
plug::IPort *pIn; // Input port
plug::IPort *pOut; // Output port
plug::IPort *pScIn; // Sidechain input port
plug::IPort *pShmIn; // Shared memory link input port
plug::IPort *vVisibility[MG_TOTAL]; // Meters visibility
plug::IPort *vMeters[MG_TOTAL]; // Meters
} channel_t;
protected:
uint32_t nChannels; // Number of channels
channel_t *vChannels; // Processing channels
float *vEmptyBuffer; // Empty buffer for audio processing
float *vTime; // Mesh time points
float *vBuffer; // Temporary buffer for audio processing
float *vIDisplay; // Inline display buffer
premix_t sPremix; // Sidechain pre-mix
uint32_t nType; // Sidechain type
uint32_t nSource; // Sidechain source
uint32_t nLookahead; // Lookahead
uint32_t nDuck; // Ducking
uint32_t nHold; // Hold signal
float fTauRelease; // Release time constant
float fStereoLink; // Stereo linking
float fInGain; // Input gain
float fOutGain; // Output gain
float fScGain; // Sidechain gain
float fAmount; // The amount of data to subtract
float fDry; // Dry amount of signal
float fWet; // Wet amount of signal
bool bOutIn; // Output inpug signal
bool bOutSc; // Output sidechain value
bool bActive; // Sidechain processing is active
bool bInvert; // Invert sidechain processing
bool bPause; // Pause output graph
bool bClear; // Clear output graph
bool bUISync; // Synchronize mesh with UI
core::IDBuffer *pIDisplay; // Inline display buffer
plug::IPort *pBypass; // Bypass
plug::IPort *pGainIn; // Input gain
plug::IPort *pGainSc; // Sidechain gain
plug::IPort *pGainOut; // Output gain
plug::IPort *pOutIn; // Output input signal
plug::IPort *pOutSc; // Output sidechain
plug::IPort *pActive; // Sidechain processing is active
plug::IPort *pInvert; // Invert sidechain processing
plug::IPort *pType; // Sidechain type
plug::IPort *pSource; // Sidechain source
plug::IPort *pStereoLink; // Stereo linking
plug::IPort *pHold; // Hold time
plug::IPort *pRelease; // Release time
plug::IPort *pLookahead; // Lookahead time
plug::IPort *pDuck; // Duck time
plug::IPort *pAmount; // Amount
plug::IPort *pDry; // Dry gain
plug::IPort *pWet; // Wet gain
plug::IPort *pDryWet; // Dry/Wet balance
plug::IPort *pGraphMesh; // Meter graph mesh
plug::IPort *pPause; // Pause graph processing
plug::IPort *pClear; // Clear
uint8_t *pData; // Allocated data
protected:
void do_destroy();
void update_premix();
void premix_channels(io_buffers_t *io, size_t samples);
void process_sidechain_type(float **sc, io_buffers_t *io_buf, size_t samples);
void process_sidechain_envelope(float **sc, size_t samples);
void process_sidechain_delays(float **sc, size_t samples);
void process_sidechain_stereo_link(float **sc, size_t samples);
void apply_sidechain_signal(io_buffers_t *io_buf, size_t samples);
void output_meters();
void output_meshes();
public:
explicit ringmod_sc(const meta::plugin_t *meta);
ringmod_sc (const ringmod_sc &) = delete;
ringmod_sc (ringmod_sc &&) = delete;
virtual ~ringmod_sc() override;
ringmod_sc & operator = (const ringmod_sc &) = delete;
ringmod_sc & operator = (ringmod_sc &&) = delete;
virtual void init(plug::IWrapper *wrapper, plug::IPort **ports) override;
virtual void destroy() override;
public:
virtual void update_sample_rate(long sr) override;
virtual void update_settings() override;
virtual void ui_activated() override;
virtual void process(size_t samples) override;
virtual bool inline_display(plug::ICanvas *cv, size_t width, size_t height) override;
virtual void dump(dspu::IStateDumper *v) const override;
};
} /* namespace plugins */
} /* namespace lsp */
#endif /* PRIVATE_PLUGINS_RINGMOD_SC_H_ */
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