tracktion_LevelMeter.cpp

Go to the documentation of this file.

 /*
    ,--.                     ,--.     ,--.  ,--.
  ,-'  '-.,--.--.,--,--.,---.|  |,-.,-'  '-.`--' ,---. ,--,--,      Copyright 2024
  '-.  .-'|  .--' ,-.  | .--'|     /'-.  .-',--.| .-. ||      \   Tracktion Software
    |  |  |  |  \ '-'  \ `--.|  \  \  |  |  |  |' '-' '|  ||  |       Corporation
    `---' `--'   `--`--'`---'`--'`--' `---' `--' `---' `--''--'    www.tracktion.com
 
    Tracktion Engine uses a GPL/commercial licence - see LICENCE.md for details.
*/
 
namespace tracktion { inline namespace engine
{
 
LevelMeterPlugin::LevelMeterPlugin (PluginCreationInfo info)  : Plugin (info)
{
    showMidiActivity.referTo (state, IDs::showMidi, getUndoManager());
 
    measurer.setShowMidi (showMidiActivity);
}
 
LevelMeterPlugin::~LevelMeterPlugin()
{
    notifyListenersOfDeletion();
}
 
juce::ValueTree LevelMeterPlugin::create()
{
    juce::ValueTree v (IDs::PLUGIN);
    v.setProperty (IDs::type, xmlTypeName, nullptr);
    return v;
}
 
const char* LevelMeterPlugin::xmlTypeName = "level";
 
void LevelMeterPlugin::initialise (const PluginInitialisationInfo& info)
{
    measurer.clear();
    initialiseWithoutStopping (info);
}
 
void LevelMeterPlugin::initialiseWithoutStopping (const PluginInitialisationInfo&)
{
    TRACKTION_ASSERT_MESSAGE_THREAD
 
    if (auto t = getOwnerTrack())
    {
        controllerTrack = t->getIndexInEditTrackList();
        startTimer (1000 / 50);
        return;
    }
 
    controllerTrack = -1;
    stopTimer();
}
 
void LevelMeterPlugin::deinitialise()
{
    measurer.clear();
    stopTimer();
}
 
void LevelMeterPlugin::applyToBuffer (const PluginRenderContext& fc)
{
    SCOPED_REALTIME_CHECK
 
    if (fc.destBuffer != nullptr)
        measurer.processBuffer (*fc.destBuffer, fc.bufferStartSample, fc.bufferNumSamples);
 
    if (fc.bufferForMidiMessages != nullptr)
    {
        measurer.setShowMidi (showMidiActivity);
        measurer.processMidi (*fc.bufferForMidiMessages, nullptr);
    }
}
 
void LevelMeterPlugin::timerCallback()
{
    if (controllerTrack >= 0)
    {
        auto& ecm = engine.getExternalControllerManager();
 
        if (ecm.isAttachedToEdit (edit))
        {
            auto l = measurer.getLevelCache();
            ecm.channelLevelChanged (controllerTrack, dbToGain (l.first), dbToGain (l.second));
        }
    }
}
 
void LevelMeterPlugin::restorePluginStateFromValueTree (const juce::ValueTree& v)
{
    copyPropertiesToCachedValues (v, showMidiActivity);
 
    for (auto p : getAutomatableParameters())
        p->updateFromAttachedValue();
}
 
}} // namespace tracktion { inline namespace engine