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lmms/plugins/Compressor/CompressorControlDialog.cpp
Dalton Messmer 5916a0b477 Auto-quit rework (#8070) 
This reworks the auto-quit feature by introducing a new AudioBuffer class which keeps track of which channels are currently silent as audio flows through the effects chain.

When track channels going into an effect's input are not marked as quiet, it is assumed a signal is present and the plugin needs to wake up if it is asleep due to auto-quit. After a plugin processes a buffer, the silence status is updated.

When the auto-quit setting is disabled (that is, when effects are always kept running), effects are always assumed to have input noise (a non-quiet signal present at the plugin inputs), which should result in the same behavior as before.

Benefits:

- The auto-quit system now closely follows how it is supposed to function by only waking plugins which have non-zero input rather than waking all plugins at once whenever an instrument plays a note or a sample track plays. This granularity better fits multi-channel plugins and pin connector routing where not all plugin inputs are connected to the same track channels. This means a sleeping plugin whose inputs are connected to channels 3/4 would not need to wake up if a signal is only present on channels 1/2.
- Silencing channels that are already known to be silent is a no-op
- Calculating the absolute peak sample value for a channel already known to be silent is a no-op
- The silence flags also could be useful for other purposes, such as adding visual indicators to represent how audio signals flow in and out of each plugin
- With a little more work, auto-quit could be enabled/disabled for plugins on an individual basis
- With a little more work, auto-quit could be implemented for instrument plugins
- AudioBuffer can be used with SharedMemory
- AudioBuffer could be used in plugins for their buffers

This new system works so long as the silence flags for each channel remain valid at each point along the effect chain. Modifying the buffers without an accompanying update of the silence flags could violate assumptions. Through unit tests, the correct functioning of AudioBuffer itself can be validated, but its usage in AudioBusHandle, Mixer, and a few other places where track channels are handled will need to be done with care.

---------

Co-authored-by: Sotonye Atemie <sakertooth@gmail.com>
2026-03-09 02:32:45 -04:00

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/*
* CompressorControlDialog.cpp
*
* Copyright (c) 2020 Lost Robot <r94231@gmail.com>
*
* This file is part of LMMS - https://lmms.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "Compressor.h"
#include "CompressorControlDialog.h"
#include "CompressorControls.h"
#include <cmath>
#include <QLabel>
#include <QPainter>
#include <QWheelEvent>
#include "AutomatableButton.h"
#include "embed.h"
#include "../Eq/EqFader.h"
#include "GuiApplication.h"
#include "Knob.h"
#include "MainWindow.h"
#include "PixmapButton.h"
namespace lmms::gui
{
CompressorControlDialog::CompressorControlDialog(CompressorControls* controls) :
EffectControlDialog(controls),
m_controls(controls)
{
setAutoFillBackground(false);
setAttribute(Qt::WA_NoSystemBackground, true);
setMinimumSize(MIN_COMP_SCREEN_X, MIN_COMP_SCREEN_Y);
resize(COMP_SCREEN_X, COMP_SCREEN_Y);
m_graphPixmap.fill(QColor("transparent"));
m_visPixmap.fill(QColor("transparent"));
m_kneePixmap.fill(QColor("transparent"));
m_kneePixmap2.fill(QColor("transparent"));
m_miscPixmap.fill(QColor("transparent"));
m_controlsBoxLabel = new QLabel(this);
m_controlsBoxLabel->setPixmap(PLUGIN_NAME::getIconPixmap("controlsBox"));
m_controlsBoxLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
m_rmsEnabledLabel = new QLabel(this);
m_rmsEnabledLabel->setPixmap(PLUGIN_NAME::getIconPixmap("knob_enabled"));
m_rmsEnabledLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
m_blendEnabledLabel = new QLabel(this);
m_blendEnabledLabel->setPixmap(PLUGIN_NAME::getIconPixmap("knob_enabled"));
m_blendEnabledLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
m_lookaheadEnabledLabel = new QLabel(this);
m_lookaheadEnabledLabel->setPixmap(PLUGIN_NAME::getIconPixmap("knob_enabled"));
m_lookaheadEnabledLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
m_ratioEnabledLabel = new QLabel(this);
m_ratioEnabledLabel->setPixmap(PLUGIN_NAME::getIconPixmap("knob_enabled_large"));
m_ratioEnabledLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
m_thresholdKnob = new Knob(KnobType::Styled, this);
makeLargeKnob(m_thresholdKnob, tr("Threshold:") , " dBFS");
m_thresholdKnob->setModel(&controls->m_thresholdModel);
m_thresholdKnob->setToolTip(tr("Volume at which the compression begins to take place"));
m_ratioKnob = new Knob(KnobType::Styled, this);
makeLargeKnob(m_ratioKnob, tr("Ratio:") , ":1");
m_ratioKnob->setModel(&controls->m_ratioModel);
m_ratioKnob->setToolTip(tr("How far the compressor must turn the volume down after crossing the threshold"));
m_attackKnob = new Knob(KnobType::Styled, this);
makeLargeKnob(m_attackKnob, tr("Attack:") , " ms");
m_attackKnob->setModel(&controls->m_attackModel);
m_attackKnob->setToolTip(tr("Speed at which the compressor starts to compress the audio"));
m_releaseKnob = new Knob(KnobType::Styled, this);
makeLargeKnob(m_releaseKnob, tr("Release:") , " ms");
m_releaseKnob->setModel(&controls->m_releaseModel);
m_releaseKnob->setToolTip(tr("Speed at which the compressor ceases to compress the audio"));
m_kneeKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_kneeKnob, tr("Knee:") , " dB");
m_kneeKnob->setModel(&controls->m_kneeModel);
m_kneeKnob->setToolTip(tr("Smooth out the gain reduction curve around the threshold"));
m_rangeKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_rangeKnob, tr("Range:") , " dBFS");
m_rangeKnob->setModel(&controls->m_rangeModel);
m_rangeKnob->setToolTip(tr("Maximum gain reduction"));
m_lookaheadLengthKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_lookaheadLengthKnob, tr("Lookahead Length:") , " ms");
m_lookaheadLengthKnob->setModel(&controls->m_lookaheadLengthModel);
m_lookaheadLengthKnob->setToolTip(tr("How long the compressor has to react to the sidechain signal ahead of time"));
m_holdKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_holdKnob, tr("Hold:") , " ms");
m_holdKnob->setModel(&controls->m_holdModel);
m_holdKnob->setToolTip(tr("Delay between attack and release stages"));
m_rmsKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_rmsKnob, tr("RMS Size:") , "");
m_rmsKnob->setModel(&controls->m_rmsModel);
m_rmsKnob->setToolTip(tr("Size of the RMS buffer"));
m_inBalanceKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_inBalanceKnob, tr("Input Balance:") , "");
m_inBalanceKnob->setModel(&controls->m_inBalanceModel);
m_inBalanceKnob->setToolTip(tr("Bias the input audio to the left/right or mid/side"));
m_outBalanceKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_outBalanceKnob, tr("Output Balance:") , "");
m_outBalanceKnob->setModel(&controls->m_outBalanceModel);
m_outBalanceKnob->setToolTip(tr("Bias the output audio to the left/right or mid/side"));
m_stereoBalanceKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_stereoBalanceKnob, tr("Stereo Balance:") , "");
m_stereoBalanceKnob->setModel(&controls->m_stereoBalanceModel);
m_stereoBalanceKnob->setToolTip(tr("Bias the sidechain signal to the left/right or mid/side"));
m_blendKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_blendKnob, tr("Stereo Link Blend:") , "");
m_blendKnob->setModel(&controls->m_blendModel);
m_blendKnob->setToolTip(tr("Blend between unlinked/maximum/average/minimum stereo linking modes"));
m_tiltKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_tiltKnob, tr("Tilt Gain:") , " dB");
m_tiltKnob->setModel(&controls->m_tiltModel);
m_tiltKnob->setToolTip(tr("Bias the sidechain signal to the low or high frequencies. -6 db is lowpass, 6 db is highpass."));
m_tiltFreqKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_tiltFreqKnob, tr("Tilt Frequency:") , " Hz");
m_tiltFreqKnob->setModel(&controls->m_tiltFreqModel);
m_tiltFreqKnob->setToolTip(tr("Center frequency of sidechain tilt filter"));
m_mixKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_mixKnob, tr("Mix:") , "%");
m_mixKnob->setModel(&controls->m_mixModel);
m_mixKnob->setToolTip(tr("Balance between wet and dry signals"));
m_autoAttackKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_autoAttackKnob, tr("Auto Attack:") , "%");
m_autoAttackKnob->setModel(&controls->m_autoAttackModel);
m_autoAttackKnob->setToolTip(tr("Automatically control attack value depending on crest factor"));
m_autoReleaseKnob = new Knob(KnobType::Styled, this);
makeSmallKnob(m_autoReleaseKnob, tr("Auto Release:") , "%");
m_autoReleaseKnob->setModel(&controls->m_autoReleaseModel);
m_autoReleaseKnob->setToolTip(tr("Automatically control release value depending on crest factor"));
m_outFader = new EqFader(&controls->m_outGainModel,tr("Output gain"),
this, &controls->m_outPeakL, &controls->m_outPeakR);
m_outFader->setDisplayConversion(false);
m_outFader->setHintText(tr("Gain"), "dBFS");
m_outFader->setToolTip(tr("Output volume"));
m_inFader = new EqFader(&controls->m_inGainModel,tr("Input gain"),
this, &controls->m_inPeakL, &controls->m_inPeakR);
m_inFader->setDisplayConversion(false);
m_inFader->setHintText(tr("Gain"), "dBFS");
m_inFader->setToolTip(tr("Input volume"));
rmsButton = new PixmapButton(this, tr("Root Mean Square"));
rmsButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("rms_sel"));
rmsButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("rms_unsel"));
rmsButton->setToolTip(tr("Use RMS of the input"));
peakButton = new PixmapButton(this, tr("Peak"));
peakButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("peak_sel"));
peakButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("peak_unsel"));
peakButton->setToolTip(tr("Use absolute value of the input"));
rmsPeakGroup = new AutomatableButtonGroup(this);
rmsPeakGroup->addButton(rmsButton);
rmsPeakGroup->addButton(peakButton);
rmsPeakGroup->setModel(&controls->m_peakmodeModel);
leftRightButton = new PixmapButton(this, tr("Left/Right"));
leftRightButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("leftright_sel"));
leftRightButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("leftright_unsel"));
leftRightButton->setToolTip(tr("Compress left and right audio"));
midSideButton = new PixmapButton(this, tr("Mid/Side"));
midSideButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("midside_sel"));
midSideButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("midside_unsel"));
midSideButton->setToolTip(tr("Compress mid and side audio"));
leftRightMidSideGroup = new AutomatableButtonGroup(this);
leftRightMidSideGroup->addButton(leftRightButton);
leftRightMidSideGroup->addButton(midSideButton);
leftRightMidSideGroup->setModel(&controls->m_midsideModel);
compressButton = new PixmapButton(this, tr("Compressor"));
compressButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("compressor_sel"));
compressButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("compressor_unsel"));
compressButton->setToolTip(tr("Compress the audio"));
limitButton = new PixmapButton(this, tr("Limiter"));
limitButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("limiter_sel"));
limitButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("limiter_unsel"));
limitButton->setToolTip(tr("Set Ratio to infinity (is not guaranteed to limit audio volume)"));
compressLimitGroup = new AutomatableButtonGroup(this);
compressLimitGroup->addButton(compressButton);
compressLimitGroup->addButton(limitButton);
compressLimitGroup->setModel(&controls->m_limiterModel);
unlinkedButton = new PixmapButton(this, tr("Unlinked"));
unlinkedButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("unlinked_sel"));
unlinkedButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("unlinked_unsel"));
unlinkedButton->setToolTip(tr("Compress each channel separately"));
maximumButton = new PixmapButton(this, tr("Maximum"));
maximumButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("maximum_sel"));
maximumButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("maximum_unsel"));
maximumButton->setToolTip(tr("Compress based on the loudest channel"));
averageButton = new PixmapButton(this, tr("Average"));
averageButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("average_sel"));
averageButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("average_unsel"));
averageButton->setToolTip(tr("Compress based on the averaged channel volume"));
minimumButton = new PixmapButton(this, tr("Minimum"));
minimumButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("minimum_sel"));
minimumButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("minimum_unsel"));
minimumButton->setToolTip(tr("Compress based on the quietest channel"));
blendButton = new PixmapButton(this, tr("Blend"));
blendButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("blend_sel"));
blendButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("blend_unsel"));
blendButton->setToolTip(tr("Blend between stereo linking modes"));
stereoLinkGroup = new AutomatableButtonGroup(this);
stereoLinkGroup->addButton(unlinkedButton);
stereoLinkGroup->addButton(maximumButton);
stereoLinkGroup->addButton(averageButton);
stereoLinkGroup->addButton(minimumButton);
stereoLinkGroup->addButton(blendButton);
stereoLinkGroup->setModel(&controls->m_stereoLinkModel);
autoMakeupButton = new PixmapButton(this, tr("Auto Makeup Gain"));
autoMakeupButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("autogain_sel"));
autoMakeupButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("autogain_unsel"));
autoMakeupButton->setToolTip(tr("Automatically change makeup gain depending on threshold, knee, and ratio settings"));
autoMakeupButton->setCheckable(true);
autoMakeupButton->setModel(&controls->m_autoMakeupModel);
auditionButton = new PixmapButton(this, tr("Soft Clip"));
auditionButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("audition_sel"));
auditionButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("audition_unsel"));
auditionButton->setToolTip(tr("Play the delta signal"));
auditionButton->setCheckable(true);
auditionButton->setModel(&controls->m_auditionModel);
feedbackButton = new PixmapButton(this, tr("Soft Clip"));
feedbackButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("feedback_sel"));
feedbackButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("feedback_unsel"));
feedbackButton->setToolTip(tr("Use the compressor's output as the sidechain input"));
feedbackButton->setCheckable(true);
feedbackButton->setModel(&controls->m_feedbackModel);
lookaheadButton = new PixmapButton(this, tr("Lookahead Enabled"));
lookaheadButton->setActiveGraphic(PLUGIN_NAME::getIconPixmap("lookahead_sel"));
lookaheadButton->setInactiveGraphic(PLUGIN_NAME::getIconPixmap("lookahead_unsel"));
lookaheadButton->setToolTip(tr("Enable Lookahead, which introduces 20 milliseconds of latency"));
lookaheadButton->setCheckable(true);
lookaheadButton->setModel(&controls->m_lookaheadModel);
connect(getGUI()->mainWindow(), SIGNAL(periodicUpdate()), this, SLOT(updateDisplay()));
connect(&m_controls->m_peakmodeModel, SIGNAL(dataChanged()), this, SLOT(peakmodeChanged()));
connect(&m_controls->m_stereoLinkModel, SIGNAL(dataChanged()), this, SLOT(stereoLinkChanged()));
connect(&m_controls->m_lookaheadModel, SIGNAL(dataChanged()), this, SLOT(lookaheadChanged()));
connect(&m_controls->m_limiterModel, SIGNAL(dataChanged()), this, SLOT(limiterChanged()));
m_timeElapsed.start();
peakmodeChanged();
stereoLinkChanged();
lookaheadChanged();
limiterChanged();
}
void CompressorControlDialog::makeLargeKnob(Knob * knob, QString hint, QString unit)
{
knob->setHintText(hint, unit);
knob->setFixedSize(56, 56);
knob->setOuterRadius(23);
knob->setInnerRadius(15);
knob->setCenterPointX(28);
knob->setCenterPointY(28);
}
void CompressorControlDialog::makeSmallKnob(Knob * knob, QString hint, QString unit)
{
knob->setHintText(hint, unit);
knob->setFixedSize(30, 30);
knob->setOuterRadius(10);
knob->setInnerRadius(4);
knob->setCenterPointX(15);
knob->setCenterPointY(15);
}
void CompressorControlDialog::peakmodeChanged()
{
m_rmsKnob->setVisible(!m_controls->m_peakmodeModel.value());
m_rmsEnabledLabel->setVisible(!m_controls->m_peakmodeModel.value());
}
void CompressorControlDialog::stereoLinkChanged()
{
m_blendKnob->setVisible(m_controls->m_stereoLinkModel.value() == 4);
m_blendEnabledLabel->setVisible(m_controls->m_stereoLinkModel.value() == 4);
}
void CompressorControlDialog::lookaheadChanged()
{
m_lookaheadLengthKnob->setVisible(m_controls->m_lookaheadModel.value());
m_lookaheadEnabledLabel->setVisible(m_controls->m_lookaheadModel.value());
feedbackButton->setVisible(!m_controls->m_lookaheadModel.value());
}
void CompressorControlDialog::limiterChanged()
{
m_ratioKnob->setVisible(!m_controls->m_limiterModel.value());
m_ratioEnabledLabel->setVisible(!m_controls->m_limiterModel.value());
}
void CompressorControlDialog::updateDisplay()
{
if (!isVisible())
{
m_timeElapsed.restart();
return;
}
int elapsedMil = m_timeElapsed.elapsed();
m_timeElapsed.restart();
m_timeSinceLastUpdate += elapsedMil;
m_compPixelMovement = int(m_timeSinceLastUpdate / COMP_MILLI_PER_PIXEL);
m_timeSinceLastUpdate %= COMP_MILLI_PER_PIXEL;
// Time Change / Daylight Savings Time protection
if (!m_compPixelMovement || m_compPixelMovement <= 0)
{
return;
}
if (!m_controls->m_effect->isProcessingAudio())
{
m_controls->m_effect->m_displayPeak[0] = COMP_NOISE_FLOOR;
m_controls->m_effect->m_displayPeak[1] = COMP_NOISE_FLOOR;
m_controls->m_effect->m_displayGain[0] = 1;
m_controls->m_effect->m_displayGain[1] = 1;
}
m_peakAvg = (m_controls->m_effect->m_displayPeak[0] + m_controls->m_effect->m_displayPeak[1]) * 0.5f;
m_gainAvg = (m_controls->m_effect->m_displayGain[0] + m_controls->m_effect->m_displayGain[1]) * 0.5f;
m_controls->m_effect->m_displayPeak[0] = m_controls->m_effect->m_yL[0];
m_controls->m_effect->m_displayPeak[1] = m_controls->m_effect->m_yL[1];
m_controls->m_effect->m_displayGain[0] = m_controls->m_effect->m_gainResult[0];
m_controls->m_effect->m_displayGain[1] = m_controls->m_effect->m_gainResult[1];
m_yPoint = dbfsToYPoint(ampToDbfs(m_peakAvg));
m_yGainPoint = dbfsToYPoint(ampToDbfs(m_gainAvg));
m_threshYPoint = dbfsToYPoint(m_controls->m_effect->m_thresholdVal);
m_threshXPoint = m_kneeWindowSizeY - m_threshYPoint;
drawVisPixmap();
if (m_controls->m_effect->m_redrawKnee)
{
redrawKnee();
}
drawKneePixmap2();
if (m_controls->m_effect->m_redrawThreshold)
{
drawMiscPixmap();
}
m_lastPoint = m_yPoint;
m_lastGainPoint = m_yGainPoint;
update();
}
void CompressorControlDialog::drawVisPixmap()
{
m_p.begin(&m_visPixmap);
// Move entire display to the left
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.drawPixmap(-m_compPixelMovement, 0, m_visPixmap);
m_p.fillRect(m_windowSizeX-m_compPixelMovement, 0, m_windowSizeX, m_windowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.setRenderHint(QPainter::Antialiasing, true);
// Draw translucent portion of input volume line
m_p.setPen(QPen(m_inVolAreaColor, 1));
for (int i = 0; i < m_compPixelMovement; ++i)
{
const int temp = std::lerp(
m_lastPoint,
m_yPoint,
static_cast<float>(i) / static_cast<float>(m_compPixelMovement)
);
m_p.drawLine(m_windowSizeX-m_compPixelMovement+i, temp, m_windowSizeX-m_compPixelMovement+i, m_windowSizeY);
}
// Draw input volume line
m_p.setPen(QPen(m_inVolColor, 1));
m_p.drawLine(m_windowSizeX-m_compPixelMovement-1, m_lastPoint, m_windowSizeX, m_yPoint);
// Draw translucent portion of output volume line
m_p.setPen(QPen(m_outVolAreaColor, 1));
for (int i = 0; i < m_compPixelMovement; ++i)
{
const int temp = std::lerp(
m_lastPoint + m_lastGainPoint,
m_yPoint + m_yGainPoint,
static_cast<float>(i) / static_cast<float>(m_compPixelMovement)
);
m_p.drawLine(m_windowSizeX-m_compPixelMovement+i, temp, m_windowSizeX-m_compPixelMovement+i, m_windowSizeY);
}
// Draw output volume line
m_p.setPen(QPen(m_outVolColor, 1));
m_p.drawLine(m_windowSizeX-m_compPixelMovement-1, m_lastPoint+m_lastGainPoint, m_windowSizeX, m_yPoint+m_yGainPoint);
// Draw gain reduction line
m_p.setPen(QPen(m_gainReductionColor, 2));
m_p.drawLine(m_windowSizeX-m_compPixelMovement-1, m_lastGainPoint, m_windowSizeX, m_yGainPoint);
m_p.end();
}
void CompressorControlDialog::redrawKnee()
{
m_controls->m_effect->m_redrawKnee = false;
// Start drawing knee visualizer
m_p.begin(&m_kneePixmap);
m_p.setRenderHint(QPainter::Antialiasing, false);
// Clear display
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_kneeWindowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.setRenderHint(QPainter::Antialiasing, true);
m_p.setPen(QPen(m_kneeColor, 3));
// Limiter = infinite ratio
float actualRatio = m_controls->m_limiterModel.value() ? 0 : m_controls->m_effect->m_ratioVal;
// Calculate endpoints for the two straight lines
const float thresholdVal = m_controls->m_effect->m_thresholdVal;
const float kneeVal = m_controls->m_effect->m_kneeVal;
float kneePoint1 = thresholdVal - kneeVal;
float kneePoint2X = thresholdVal + kneeVal;
float kneePoint2Y = thresholdVal + kneeVal * actualRatio;
float ratioPoint = thresholdVal + (-thresholdVal * actualRatio);
// Draw two straight lines
m_p.drawLine(0, m_kneeWindowSizeY, dbfsToXPoint(kneePoint1), dbfsToYPoint(kneePoint1));
if (dbfsToXPoint(kneePoint2X) < m_kneeWindowSizeY)
{
m_p.drawLine(dbfsToXPoint(kneePoint2X), dbfsToYPoint(kneePoint2Y), m_kneeWindowSizeY, dbfsToYPoint(ratioPoint));
}
// Draw knee section
if (kneeVal)
{
m_p.setPen(QPen(m_kneeColor2, 3));
auto prevPoint = std::array{kneePoint1, kneePoint1};
auto newPoint = std::array{0.f, 0.f};
// Draw knee curve using many straight lines.
for (int i = 0; i < COMP_KNEE_LINES; ++i)
{
newPoint[0] = std::lerp(kneePoint1, kneePoint2X, (i + 1) / static_cast<float>(COMP_KNEE_LINES));
const float temp = newPoint[0] - thresholdVal + kneeVal;
newPoint[1] = (newPoint[0] + (actualRatio - 1) * temp * temp / (4 * kneeVal));
m_p.drawLine(dbfsToXPoint(prevPoint[0]), dbfsToYPoint(prevPoint[1]), dbfsToXPoint(newPoint[0]), dbfsToYPoint(newPoint[1]));
prevPoint[0] = newPoint[0];
prevPoint[1] = newPoint[1];
}
}
m_p.setRenderHint(QPainter::Antialiasing, false);
// Erase right portion
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(m_kneeWindowSizeX + 1, 0, m_windowSizeX, m_kneeWindowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.end();
m_p.begin(&m_kneePixmap2);
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_kneeWindowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.end();
m_lastKneePoint = 0;
}
void CompressorControlDialog::drawKneePixmap2()
{
m_p.begin(&m_kneePixmap2);
m_p.setRenderHint(QPainter::Antialiasing, false);
int kneePoint = dbfsToXPoint(ampToDbfs(m_peakAvg));
if (kneePoint > m_lastKneePoint)
{
QRectF knee2Rect = QRect(m_lastKneePoint, 0, kneePoint - m_lastKneePoint, m_kneeWindowSizeY);
m_p.drawPixmap(knee2Rect, m_kneePixmap, knee2Rect);
}
else
{
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(kneePoint, 0, m_lastKneePoint, m_kneeWindowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
}
m_lastKneePoint = kneePoint;
m_p.end();
}
void CompressorControlDialog::drawMiscPixmap()
{
m_p.begin(&m_miscPixmap);
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.setRenderHint(QPainter::Antialiasing, true);
// Draw threshold lines
m_p.setPen(QPen(m_threshColor, 2, Qt::DotLine));
m_p.drawLine(0, m_threshYPoint, m_windowSizeX, m_threshYPoint);
m_p.drawLine(m_threshXPoint, 0, m_threshXPoint, m_kneeWindowSizeY);
m_p.end();
m_controls->m_effect->m_redrawThreshold = false;
}
void CompressorControlDialog::paintEvent(QPaintEvent *event)
{
if (!isVisible())
{
return;
}
m_p.begin(this);
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, m_backgroundColor);
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.drawPixmap(0, 0, m_graphPixmap);
m_p.drawPixmap(0, 0, m_visPixmap);
m_p.setOpacity(0.25);
m_p.drawPixmap(0, 0, m_kneePixmap);
m_p.setOpacity(1);
if (m_controls->m_effect->isProcessingAudio())
{
m_p.drawPixmap(0, 0, m_kneePixmap2);
}
m_p.drawPixmap(0, 0, m_miscPixmap);
m_p.end();
}
inline int CompressorControlDialog::dbfsToYPoint(float inDbfs)
{
return (-((inDbfs + m_dbRange) / m_dbRange) + 1) * m_windowSizeY;
}
inline int CompressorControlDialog::dbfsToXPoint(float inDbfs)
{
return m_kneeWindowSizeY - dbfsToYPoint(inDbfs);
}
void CompressorControlDialog::resizeEvent(QResizeEvent *event)
{
resetCompressorView();
}
void CompressorControlDialog::wheelEvent(QWheelEvent * event)
{
const float temp = m_dbRange;
const float dbRangeNew = m_dbRange - copysignf(COMP_GRID_SPACING, event->angleDelta().y());
m_dbRange = round(qBound(COMP_GRID_SPACING, dbRangeNew, COMP_GRID_MAX) / COMP_GRID_SPACING) * COMP_GRID_SPACING;
// Only reset view if the scolling had an effect
if (m_dbRange != temp)
{
drawGraph();
m_controls->m_effect->m_redrawKnee = true;
m_controls->m_effect->m_redrawThreshold = true;
}
}
void CompressorControlDialog::drawGraph()
{
m_p.begin(&m_graphPixmap);
m_p.setRenderHint(QPainter::Antialiasing, false);
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
m_p.setPen(QPen(m_textColor, 1));
// Arbitrary formula for increasing font size when window size increases
m_p.setFont(QFont("Arial", qMax(int(m_windowSizeY / 1080.f * 24), 12)));
// Redraw graph
m_p.setPen(QPen(m_graphColor, 1));
for (int i = 0; i < m_dbRange / COMP_GRID_SPACING + 1; ++i)
{
m_p.drawLine(0, dbfsToYPoint(-COMP_GRID_SPACING * i), m_windowSizeX, dbfsToYPoint(-COMP_GRID_SPACING * i));
m_p.drawLine(dbfsToXPoint(-COMP_GRID_SPACING * i), 0, dbfsToXPoint(-COMP_GRID_SPACING * i), m_kneeWindowSizeY);
m_p.drawText(QRectF(m_windowSizeX - 50, dbfsToYPoint(-COMP_GRID_SPACING * i), 50, 50), Qt::AlignRight | Qt::AlignTop, QString::number(i * -COMP_GRID_SPACING));
}
m_p.end();
}
void CompressorControlDialog::mouseDoubleClickEvent(QMouseEvent* event)
{
setGuiVisibility(!m_guiVisibility);
}
void CompressorControlDialog::setGuiVisibility(bool isVisible)
{
if (!isVisible)
{
m_rmsKnob->setVisible(isVisible);
m_rmsEnabledLabel->setVisible(isVisible);
m_lookaheadLengthKnob->setVisible(isVisible);
m_lookaheadEnabledLabel->setVisible(isVisible);
m_blendKnob->setVisible(isVisible);
m_blendEnabledLabel->setVisible(isVisible);
m_ratioKnob->setVisible(isVisible);
m_ratioEnabledLabel->setVisible(isVisible);
}
else
{
m_rmsKnob->setVisible(!m_controls->m_peakmodeModel.value());
m_rmsEnabledLabel->setVisible(!m_controls->m_peakmodeModel.value());
m_blendKnob->setVisible(m_controls->m_stereoLinkModel.value() == 4);
m_blendEnabledLabel->setVisible(m_controls->m_stereoLinkModel.value() == 4);
m_lookaheadLengthKnob->setVisible(m_controls->m_lookaheadModel.value());
m_lookaheadEnabledLabel->setVisible(m_controls->m_lookaheadModel.value());
m_ratioKnob->setVisible(!m_controls->m_limiterModel.value());
m_ratioEnabledLabel->setVisible(!m_controls->m_limiterModel.value());
}
m_controlsBoxLabel->setVisible(isVisible);
m_thresholdKnob->setVisible(isVisible);
m_attackKnob->setVisible(isVisible);
m_releaseKnob->setVisible(isVisible);
m_kneeKnob->setVisible(isVisible);
m_rangeKnob->setVisible(isVisible);
m_holdKnob->setVisible(isVisible);
m_inBalanceKnob->setVisible(isVisible);
m_outBalanceKnob->setVisible(isVisible);
m_stereoBalanceKnob->setVisible(isVisible);
m_tiltKnob->setVisible(isVisible);
m_tiltFreqKnob->setVisible(isVisible);
m_mixKnob->setVisible(isVisible);
m_autoAttackKnob->setVisible(isVisible);
m_autoReleaseKnob->setVisible(isVisible);
m_outFader->setVisible(isVisible);
m_inFader->setVisible(isVisible);
rmsButton->setVisible(isVisible);
peakButton->setVisible(isVisible);
rmsPeakGroup->setVisible(isVisible);
leftRightButton->setVisible(isVisible);
midSideButton->setVisible(isVisible);
compressButton->setVisible(isVisible);
limitButton->setVisible(isVisible);
unlinkedButton->setVisible(isVisible);
maximumButton->setVisible(isVisible);
averageButton->setVisible(isVisible);
minimumButton->setVisible(isVisible);
blendButton->setVisible(isVisible);
autoMakeupButton->setVisible(isVisible);
auditionButton->setVisible(isVisible);
feedbackButton->setVisible(isVisible);
lookaheadButton->setVisible(isVisible);
m_guiVisibility = isVisible;
}
void CompressorControlDialog::resetCompressorView()
{
m_windowSizeX = size().width();
m_windowSizeY = size().height();
m_kneeWindowSizeX = m_windowSizeY;
m_kneeWindowSizeY = m_windowSizeY;
m_controlsBoxX = (m_windowSizeX - COMP_BOX_X) * 0.5;
m_controlsBoxY = m_windowSizeY - 40 - COMP_BOX_Y;
m_controls->m_effect->m_redrawKnee = true;
m_controls->m_effect->m_redrawThreshold = true;
m_lastKneePoint = 0;
drawGraph();
m_p.begin(&m_visPixmap);
m_p.setCompositionMode(QPainter::CompositionMode_Source);
m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, QColor("transparent"));
m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
// Draw line at right side, so the sudden
// content that the visualizer will display
// later on won't look too ugly
m_p.setPen(QPen(m_resetColor, 3));
m_p.drawLine(m_windowSizeX, 0, m_windowSizeX, m_windowSizeY);
m_p.end();
m_controlsBoxLabel->move(m_controlsBoxX, m_controlsBoxY);
m_rmsEnabledLabel->move(m_controlsBoxX + 429, m_controlsBoxY + 209);
m_blendEnabledLabel->move(m_controlsBoxX + 587, m_controlsBoxY + 197);
m_lookaheadEnabledLabel->move(m_controlsBoxX + 221, m_controlsBoxY + 135);
m_ratioEnabledLabel->move(m_controlsBoxX + 267, m_controlsBoxY + 21);
m_thresholdKnob->move(m_controlsBoxX + 137, m_controlsBoxY + 21);
m_ratioKnob->move(m_controlsBoxX + 267, m_controlsBoxY + 21);
m_attackKnob->move(m_controlsBoxX + 397, m_controlsBoxY + 21);
m_releaseKnob->move(m_controlsBoxX + 527, m_controlsBoxY + 21);
m_kneeKnob->move(m_controlsBoxX + 97, m_controlsBoxY + 135);
m_rangeKnob->move(m_controlsBoxX + 159, m_controlsBoxY + 135);
m_lookaheadLengthKnob->move(m_controlsBoxX + 221, m_controlsBoxY + 135);
m_holdKnob->move(m_controlsBoxX + 283, m_controlsBoxY + 135);
m_rmsKnob->move(m_controlsBoxX + 429, m_controlsBoxY + 209);
m_inBalanceKnob->move(m_controlsBoxX + 27, m_controlsBoxY + 219);
m_outBalanceKnob->move(m_controlsBoxX + 662, m_controlsBoxY + 219);
m_stereoBalanceKnob->move(m_controlsBoxX + 522, m_controlsBoxY + 137);
m_blendKnob->move(m_controlsBoxX + 587, m_controlsBoxY + 197);
m_tiltKnob->move(m_controlsBoxX + 364, m_controlsBoxY + 138);
m_tiltFreqKnob->move(m_controlsBoxX + 415, m_controlsBoxY + 138);
m_mixKnob->move(m_controlsBoxX + 27, m_controlsBoxY + 13);
m_outFader->move(m_controlsBoxX + 666, m_controlsBoxY + 91);
m_inFader->move(m_controlsBoxX + 31, m_controlsBoxY + 91);
rmsButton->move(m_controlsBoxX + 337, m_controlsBoxY + 231);
peakButton->move(m_controlsBoxX + 337, m_controlsBoxY + 248);
leftRightButton->move(m_controlsBoxX + 220, m_controlsBoxY + 231);
midSideButton->move(m_controlsBoxX + 220, m_controlsBoxY + 248);
compressButton->move(m_controlsBoxX + 98, m_controlsBoxY + 231);
limitButton->move(m_controlsBoxX + 98, m_controlsBoxY + 248);
unlinkedButton->move(m_controlsBoxX + 495, m_controlsBoxY + 180);
maximumButton->move(m_controlsBoxX + 495, m_controlsBoxY + 197);
averageButton->move(m_controlsBoxX + 495, m_controlsBoxY + 214);
minimumButton->move(m_controlsBoxX + 495, m_controlsBoxY + 231);
blendButton->move(m_controlsBoxX + 495, m_controlsBoxY + 248);
autoMakeupButton->move(m_controlsBoxX + 220, m_controlsBoxY + 206);
auditionButton->move(m_controlsBoxX + 658, m_controlsBoxY + 14);
feedbackButton->move(m_controlsBoxX + 98, m_controlsBoxY + 206);
m_autoAttackKnob->move(m_controlsBoxX + 460, m_controlsBoxY + 38);
m_autoReleaseKnob->move(m_controlsBoxX + 590, m_controlsBoxY + 38);
lookaheadButton->move(m_controlsBoxX + 202, m_controlsBoxY + 171);
}
} // namespace lmms::gui
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