mirror of
https://github.com/LMMS/lmms.git
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167 lines
3.6 KiB
C++
167 lines
3.6 KiB
C++
/*
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* VstSyncController.cpp - manage synchronization between LMMS and VST plugins
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*
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* Copyright (c) 2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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* Copyright (c) 2013 Mike Choi <rdavidian71/at/gmail/dot/com>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include "VstSyncController.h"
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#include <stdexcept>
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#include <QDebug>
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#include <QUuid>
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#include "AudioEngine.h"
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#include "ConfigManager.h"
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#include "Engine.h"
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#include "RemotePlugin.h"
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namespace lmms
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{
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VstSyncController::VstSyncController()
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{
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try
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{
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m_syncData.create(QUuid::createUuid().toString().toStdString());
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}
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catch (const std::runtime_error& error)
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{
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qCritical() << "Failed to allocate shared memory for VST sync:" << error.what();
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return;
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}
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m_syncData->isPlaying = false;
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m_syncData->m_bufferSize = Engine::audioEngine()->framesPerPeriod();
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m_syncData->timeSigNumer = 4;
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m_syncData->timeSigDenom = 4;
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connect(Engine::audioEngine(), &AudioEngine::sampleRateChanged, this, &VstSyncController::updateSampleRate);
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updateSampleRate();
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}
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void VstSyncController::setAbsolutePosition(double ticks)
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{
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if (!m_syncData) { return; }
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#ifdef VST_SNC_LATENCY
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m_syncData->ppqPos = ( ( ticks + 0 ) / 48.0 ) - m_syncData->m_latency;
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#else
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m_syncData->ppqPos = ( ( ticks + 0 ) / 48.0 );
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#endif
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}
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void VstSyncController::setPlaybackState(bool enabled)
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{
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if (!m_syncData) { return; }
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m_syncData->isPlaying = enabled;
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}
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void VstSyncController::setTempo(int newTempo)
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{
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if (!m_syncData) { return; }
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m_syncData->m_bpm = newTempo;
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#ifdef VST_SNC_LATENCY
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m_syncData->m_latency = m_syncData->m_bufferSize * newTempo / ( (float) m_syncData->m_sampleRate * 60 );
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#endif
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}
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void VstSyncController::setTimeSignature(int num, int denom)
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{
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if (!m_syncData) { return; }
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m_syncData->timeSigNumer = num;
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m_syncData->timeSigDenom = denom;
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}
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void VstSyncController::startCycle(int startTick, int endTick)
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{
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if (!m_syncData) { return; }
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m_syncData->isCycle = true;
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m_syncData->cycleStart = startTick / (float)48;
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m_syncData->cycleEnd = endTick / (float)48;
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}
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void VstSyncController::stopCycle()
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{
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if (!m_syncData) { return; }
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m_syncData->isCycle = false;
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}
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void VstSyncController::setPlaybackJumped(bool jumped)
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{
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if (!m_syncData) { return; }
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m_syncData->m_playbackJumped = jumped;
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}
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void VstSyncController::update()
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{
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if (!m_syncData) { return; }
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m_syncData->m_bufferSize = Engine::audioEngine()->framesPerPeriod();
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#ifdef VST_SNC_LATENCY
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m_syncData->m_latency = m_syncData->m_bufferSize * m_syncData->m_bpm / ( (float) m_syncData->m_sampleRate * 60 );
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#endif
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}
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void VstSyncController::updateSampleRate()
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{
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if (!m_syncData) { return; }
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m_syncData->m_sampleRate = Engine::audioEngine()->processingSampleRate();
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#ifdef VST_SNC_LATENCY
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m_syncData->m_latency = m_syncData->m_bufferSize * m_syncData->m_bpm / ( (float) m_syncData->m_sampleRate * 60 );
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#endif
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}
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} // namespace lmms
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