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/*
* Copyright (C) 2021 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2021 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-plugins-limiter
* Created on: 3 авг. 2021 г.
*
* lsp-plugins-limiter 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-limiter 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-limiter. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PRIVATE_PLUGINS_LIMITER_H_
#define PRIVATE_PLUGINS_LIMITER_H_
#include <lsp-plug.in/plug-fw/plug.h>
#include <lsp-plug.in/plug-fw/core/IDBuffer.h>
#include <lsp-plug.in/dsp-units/ctl/Blink.h>
#include <lsp-plug.in/dsp-units/ctl/Bypass.h>
#include <lsp-plug.in/dsp-units/dynamics/Limiter.h>
#include <lsp-plug.in/dsp-units/util/Delay.h>
#include <lsp-plug.in/dsp-units/util/Dither.h>
#include <lsp-plug.in/dsp-units/util/MeterGraph.h>
#include <lsp-plug.in/dsp-units/util/Oversampler.h>
#include <lsp-plug.in/dsp-units/util/Sidechain.h>
#include <private/meta/limiter.h>
namespace lsp
{
namespace plugins
{
/**
* Limiter Plugin Series
*/
class limiter: public plug::Module
{
protected:
enum sc_graph_t
{
G_IN,
G_OUT,
G_SC,
G_GAIN,
G_TOTAL
};
typedef struct channel_t
{
dspu::Bypass sBypass; // Bypass
dspu::Oversampler sOver; // Oversampler object for signal
dspu::Oversampler sScOver; // Sidechain oversampler object for signal
dspu::Limiter sLimit; // Limiter
dspu::Delay sDryDelay; // Dry delay
dspu::MeterGraph sGraph[G_TOTAL]; // Input meter graph
dspu::Blink sBlink; // Gain blink
const float *vIn; // Input data
const float *vSc; // Sidechain data
float *vOut; // Output data
float *vDataBuf; // Audio data buffer (oversampled)
float *vScBuf; // Sidechain buffer
float *vGainBuf; // Applying gain buffer
float *vOutBuf; // Output buffer
bool bVisible[G_TOTAL]; // Input visibility
bool bOutVisible; // Output visibility
bool bGainVisible; // Gain visibility
bool bScVisible; // Sidechain visibility
plug::IPort *pIn; // Input port
plug::IPort *pOut; // Output port
plug::IPort *pSc; // Sidechain port
plug::IPort *pVisible[G_TOTAL]; // Input visibility
plug::IPort *pGraph[G_TOTAL]; // History graphs
plug::IPort *pMeter[G_TOTAL]; // Meters
} channel_t;
protected:
size_t nChannels; // Number of channels
bool bSidechain; // Sidechain presence flag
channel_t *vChannels; // Audio channels
float *vTime; // Time points buffer
bool bPause; // Pause button
bool bClear; // Clear button
bool bExtSc; // External sidechain
bool bScListen; // Sidechain listen
float fInGain; // Input gain
float fOutGain; // Output gain
float fPreamp; // Sidechain pre-amplification
size_t nOversampling; // Oversampling
float fStereoLink; // Stereo linking
core::IDBuffer *pIDisplay; // Inline display buffer
bool bUISync; // Synchronize with UI
dspu::Dither sDither; // Dither
plug::IPort *pBypass; // Bypass port
plug::IPort *pInGain; // Input gain
plug::IPort *pOutGain; // Output gain
plug::IPort *pPreamp; // Sidechain pre-amplification
plug::IPort *pAlrOn; // Automatic level regulation
plug::IPort *pAlrAttack; // Automatic level regulation attack
plug::IPort *pAlrRelease; // Automatic level regulation release
plug::IPort *pMode; // Operating mode
plug::IPort *pThresh; // Limiter threshold
plug::IPort *pLookahead; // Lookahead time
plug::IPort *pAttack; // Attack time
plug::IPort *pRelease; // Release time
plug::IPort *pPause; // Pause gain
plug::IPort *pClear; // Cleanup gain
plug::IPort *pExtSc; // External sidechain
plug::IPort *pScListen; // Sidechain listen
plug::IPort *pKnee; // Limiter knee
plug::IPort *pBoost; // Gain boost
plug::IPort *pOversampling; // Oversampling
plug::IPort *pDithering; // Dithering
plug::IPort *pStereoLink; // Stereo linking
uint8_t *pData; // Allocated data
protected:
static dspu::over_mode_t get_oversampling_mode(size_t mode);
static bool get_filtering(size_t mode);
static dspu::limiter_mode_t get_limiter_mode(size_t mode);
static size_t get_dithering(size_t mode);
void sync_latency();
public:
explicit limiter(const meta::plugin_t *metadata, bool sc, bool stereo);
virtual ~limiter();
public:
virtual void init(plug::IWrapper *wrapper, plug::IPort **ports);
virtual void destroy();
virtual void update_settings();
virtual void update_sample_rate(long sr);
virtual void ui_activated();
virtual void process(size_t samples);
virtual bool inline_display(plug::ICanvas *cv, size_t width, size_t height);
virtual void dump(dspu::IStateDumper *v) const;
};
} // namespace plugins
} // namespace lsp
#endif /* PRIVATE_PLUGINS_LIMITER_H_ */
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