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/*
* PlayState.cpp
* -------------
* Purpose: This class represents all of the playback state of a module.
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#include "PlayState.h"
#include "MIDIMacros.h"
#include "Mixer.h"
#include "Sndfile.h"
OPENMPT_NAMESPACE_BEGIN
PlayState::PlayState()
{
Chn.fill({});
m_midiMacroScratchSpace.reserve(kMacroLength); // Note: If macros ever become variable-length, the scratch space needs to be at least one byte longer than the longest macro in the file for end-of-SysEx insertion to stay allocation-free in the mixer!
}
void PlayState::ResetGlobalVolumeRamping() noexcept
{
m_lHighResRampingGlobalVolume = m_nGlobalVolume << VOLUMERAMPPRECISION;
m_nGlobalVolumeDestination = m_nGlobalVolume;
m_nSamplesToGlobalVolRampDest = 0;
m_nGlobalVolumeRampAmount = 0;
}
void PlayState::UpdateTimeSignature(const CSoundFile &sndFile) noexcept
{
if(!sndFile.Patterns.IsValidIndex(m_nPattern) || !sndFile.Patterns[m_nPattern].GetOverrideSignature())
{
m_nCurrentRowsPerBeat = sndFile.m_nDefaultRowsPerBeat;
m_nCurrentRowsPerMeasure = sndFile.m_nDefaultRowsPerMeasure;
} else
{
m_nCurrentRowsPerBeat = sndFile.Patterns[m_nPattern].GetRowsPerBeat();
m_nCurrentRowsPerMeasure = sndFile.Patterns[m_nPattern].GetRowsPerMeasure();
}
}
void PlayState::UpdatePPQ(bool patternTransition) noexcept
{
ROWINDEX rpm = m_nCurrentRowsPerMeasure ? m_nCurrentRowsPerMeasure : DEFAULT_ROWS_PER_MEASURE;
ROWINDEX rpb = m_nCurrentRowsPerBeat ? m_nCurrentRowsPerBeat : DEFAULT_ROWS_PER_BEAT;
if(m_lTotalSampleCount > 0 && (patternTransition || !(m_nRow % rpm)))
{
// Pattern end = end of measure, so round up PPQ to the next full measure
m_ppqPosBeat += (rpm + (rpb - 1)) / rpb;
m_ppqPosFract = 0;
}
}
mpt::span<ModChannel> PlayState::PatternChannels(const CSoundFile &sndFile) noexcept
{
return mpt::as_span(Chn).subspan(0, std::min(Chn.size(), static_cast<size_t>(sndFile.GetNumChannels())));
}
mpt::span<ModChannel> PlayState::BackgroundChannels(const CSoundFile &sndFile) noexcept
{
return mpt::as_span(Chn).subspan(std::min(Chn.size(), static_cast<size_t>(sndFile.GetNumChannels())));
}
OPENMPT_NAMESPACE_END
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