350 lines
8.7 KiB
C++
350 lines
8.7 KiB
C++
/*
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* ModInstrument.cpp
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* -----------------
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* Purpose: Helper functions for Module Instrument handling
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#include "stdafx.h"
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#include "Sndfile.h"
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#include "ModInstrument.h"
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OPENMPT_NAMESPACE_BEGIN
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// Convert envelope data between various formats.
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void InstrumentEnvelope::Convert(MODTYPE fromType, MODTYPE toType)
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{
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if(!(fromType & MOD_TYPE_XM) && (toType & MOD_TYPE_XM))
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{
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// IT / MPTM -> XM: Expand loop by one tick, convert sustain loops to sustain points, remove carry flag.
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nSustainStart = nSustainEnd;
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dwFlags.reset(ENV_CARRY);
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if(nLoopEnd > nLoopStart && dwFlags[ENV_LOOP])
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{
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for(uint32 node = nLoopEnd; node < size(); node++)
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{
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at(node).tick++;
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}
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}
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} else if((fromType & MOD_TYPE_XM) && !(toType & MOD_TYPE_XM))
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{
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if(nSustainStart > nLoopEnd && dwFlags[ENV_LOOP])
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{
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// In the IT format, the sustain loop is always considered before the envelope loop.
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// In the XM format, whichever of the two is encountered first is considered.
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// So we have to disable the sustain loop if it was behind the normal loop.
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dwFlags.reset(ENV_SUSTAIN);
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}
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// XM -> IT / MPTM: Shorten loop by one tick by inserting bogus point
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if(nLoopEnd > nLoopStart && dwFlags[ENV_LOOP] && nLoopEnd < size())
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{
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if(at(nLoopEnd).tick - 1 > at(nLoopEnd - 1).tick)
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{
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// Insert an interpolated point just before the loop point.
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EnvelopeNode::tick_t tick = at(nLoopEnd).tick - 1u;
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auto interpolatedValue = static_cast<EnvelopeNode::value_t>(GetValueFromPosition(tick, 64));
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insert(begin() + nLoopEnd, EnvelopeNode(tick, interpolatedValue));
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} else
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{
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// There is already a point before the loop point: Use it as new loop end.
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nLoopEnd--;
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}
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}
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}
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if(toType != MOD_TYPE_MPT)
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{
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nReleaseNode = ENV_RELEASE_NODE_UNSET;
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}
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}
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// Get envelope value at a given tick. Assumes that the envelope data is in rage [0, rangeIn],
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// returns value in range [0, rangeOut].
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int32 InstrumentEnvelope::GetValueFromPosition(int position, int32 rangeOut, int32 rangeIn) const
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{
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uint32 pt = size() - 1u;
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const int32 ENV_PRECISION = 1 << 16;
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// Checking where current 'tick' is relative to the envelope points.
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for(uint32 i = 0; i < size() - 1u; i++)
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{
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if (position <= at(i).tick)
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{
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pt = i;
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break;
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}
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}
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int x2 = at(pt).tick;
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int32 value = 0;
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if(position >= x2)
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{
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// Case: current 'tick' is on a envelope point.
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value = at(pt).value * ENV_PRECISION / rangeIn;
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} else
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{
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// Case: current 'tick' is between two envelope points.
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int x1 = 0;
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if(pt)
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{
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// Get previous node's value and tick.
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value = at(pt - 1).value * ENV_PRECISION / rangeIn;
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x1 = at(pt - 1).tick;
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}
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if(x2 > x1 && position > x1)
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{
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// Linear approximation between the points;
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// f(x + d) ~ f(x) + f'(x) * d, where f'(x) = (y2 - y1) / (x2 - x1)
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value += Util::muldiv(position - x1, (at(pt).value * ENV_PRECISION / rangeIn - value), x2 - x1);
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}
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}
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Limit(value, int32(0), ENV_PRECISION);
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return (value * rangeOut + ENV_PRECISION / 2) / ENV_PRECISION;
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}
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void InstrumentEnvelope::Sanitize(uint8 maxValue)
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{
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if(!empty())
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{
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front().tick = 0;
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LimitMax(front().value, maxValue);
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for(iterator it = begin() + 1; it != end(); it++)
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{
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it->tick = std::max(it->tick, (it - 1)->tick);
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LimitMax(it->value, maxValue);
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}
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}
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LimitMax(nLoopEnd, static_cast<decltype(nLoopEnd)>(size() - 1));
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LimitMax(nLoopStart, nLoopEnd);
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LimitMax(nSustainEnd, static_cast<decltype(nSustainEnd)>(size() - 1));
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LimitMax(nSustainStart, nSustainEnd);
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if(nReleaseNode != ENV_RELEASE_NODE_UNSET)
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LimitMax(nReleaseNode, static_cast<decltype(nReleaseNode)>(size() - 1));
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}
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ModInstrument::ModInstrument(SAMPLEINDEX sample)
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{
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SetCutoff(0, false);
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SetResonance(0, false);
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pitchToTempoLock.Set(0);
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pTuning = CSoundFile::GetDefaultTuning();
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AssignSample(sample);
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ResetNoteMap();
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}
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// Translate instrument properties between two given formats.
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void ModInstrument::Convert(MODTYPE fromType, MODTYPE toType)
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{
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MPT_UNREFERENCED_PARAMETER(fromType);
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if(toType & MOD_TYPE_XM)
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{
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ResetNoteMap();
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PitchEnv.dwFlags.reset(ENV_ENABLED | ENV_FILTER);
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dwFlags.reset(INS_SETPANNING);
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SetCutoff(GetCutoff(), false);
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SetResonance(GetResonance(), false);
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filterMode = FilterMode::Unchanged;
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nCutSwing = nPanSwing = nResSwing = nVolSwing = 0;
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nPPC = NOTE_MIDDLEC - 1;
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nPPS = 0;
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nNNA = NewNoteAction::NoteCut;
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nDCT = DuplicateCheckType::None;
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nDNA = DuplicateNoteAction::NoteCut;
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if(nMidiChannel == MidiMappedChannel)
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{
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nMidiChannel = MidiFirstChannel;
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}
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// FT2 only has unsigned Pitch Wheel Depth, and it's limited to 0...36 (in the GUI, at least. As you would expect it from FT2, this value is actually not sanitized on load).
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midiPWD = static_cast<int8>(std::abs(midiPWD));
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Limit(midiPWD, int8(0), int8(36));
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nGlobalVol = 64;
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nPan = 128;
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LimitMax(nFadeOut, 32767u);
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}
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VolEnv.Convert(fromType, toType);
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PanEnv.Convert(fromType, toType);
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PitchEnv.Convert(fromType, toType);
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if(fromType == MOD_TYPE_XM && (toType & (MOD_TYPE_IT | MOD_TYPE_MPT)))
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{
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if(!VolEnv.dwFlags[ENV_ENABLED])
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{
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// Note-Off with no envelope cuts the note immediately in XM
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VolEnv.resize(2);
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VolEnv[0].tick = 0;
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VolEnv[0].value = ENVELOPE_MAX;
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VolEnv[1].tick = 1;
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VolEnv[1].value = ENVELOPE_MIN;
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VolEnv.dwFlags.set(ENV_ENABLED | ENV_SUSTAIN);
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VolEnv.dwFlags.reset(ENV_LOOP);
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VolEnv.nSustainStart = VolEnv.nSustainEnd = 0;
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}
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}
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// Limit fadeout length for IT
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if(toType & MOD_TYPE_IT)
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{
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LimitMax(nFadeOut, 8192u);
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}
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// MPT-specific features - remove instrument tunings, Pitch/Tempo Lock, cutoff / resonance swing and filter mode for other formats
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if(!(toType & MOD_TYPE_MPT))
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{
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SetTuning(nullptr);
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pitchToTempoLock.Set(0);
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nCutSwing = nResSwing = 0;
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filterMode = FilterMode::Unchanged;
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nVolRampUp = 0;
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}
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}
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// Get a set of all samples referenced by this instrument
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std::set<SAMPLEINDEX> ModInstrument::GetSamples() const
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{
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std::set<SAMPLEINDEX> referencedSamples;
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for(const auto sample : Keyboard)
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{
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if(sample)
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{
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referencedSamples.insert(sample);
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}
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}
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return referencedSamples;
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}
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// Write sample references into a bool vector. If a sample is referenced by this instrument, true is written.
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// The caller has to initialize the vector.
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void ModInstrument::GetSamples(std::vector<bool> &referencedSamples) const
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{
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for(const auto sample : Keyboard)
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{
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if(sample != 0 && sample < referencedSamples.size())
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{
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referencedSamples[sample] = true;
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}
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}
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}
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void ModInstrument::Sanitize(MODTYPE modType)
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{
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LimitMax(nFadeOut, 65536u);
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LimitMax(nGlobalVol, 64u);
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LimitMax(nPan, 256u);
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LimitMax(wMidiBank, uint16(16384));
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LimitMax(nMidiProgram, uint8(128));
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LimitMax(nMidiChannel, uint8(17));
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if(nNNA > NewNoteAction::NoteFade) nNNA = NewNoteAction::NoteCut;
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if(nDCT > DuplicateCheckType::Plugin) nDCT = DuplicateCheckType::None;
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if(nDNA > DuplicateNoteAction::NoteFade) nDNA = DuplicateNoteAction::NoteCut;
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LimitMax(nPanSwing, uint8(64));
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LimitMax(nVolSwing, uint8(100));
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Limit(nPPS, int8(-32), int8(32));
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LimitMax(nCutSwing, uint8(64));
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LimitMax(nResSwing, uint8(64));
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#ifdef MODPLUG_TRACKER
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MPT_UNREFERENCED_PARAMETER(modType);
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const uint8 range = ENVELOPE_MAX;
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#else
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const uint8 range = modType == MOD_TYPE_AMS ? uint8_max : ENVELOPE_MAX;
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#endif
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VolEnv.Sanitize();
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PanEnv.Sanitize();
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PitchEnv.Sanitize(range);
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for(size_t i = 0; i < std::size(NoteMap); i++)
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{
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if(NoteMap[i] < NOTE_MIN || NoteMap[i] > NOTE_MAX)
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NoteMap[i] = static_cast<uint8>(i + NOTE_MIN);
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}
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if(!Resampling::IsKnownMode(resampling))
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resampling = SRCMODE_DEFAULT;
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if(nMixPlug > MAX_MIXPLUGINS)
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nMixPlug = 0;
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}
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std::map<SAMPLEINDEX, int8> ModInstrument::CanConvertToDefaultNoteMap() const
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{
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std::map<SAMPLEINDEX, int8> transposeMap;
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for(size_t i = 0; i < std::size(NoteMap); i++)
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{
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if(Keyboard[i] == 0)
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continue;
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if(!NoteMap[i] || NoteMap[i] == (i + 1))
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continue;
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const int8 relativeNote = static_cast<int8>(NoteMap[i] - (i + NOTE_MIN));
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if(transposeMap.count(Keyboard[i]) && transposeMap[Keyboard[i]] != relativeNote)
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return {};
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transposeMap[Keyboard[i]] = relativeNote;
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}
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return transposeMap;
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}
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void ModInstrument::Transpose(int8 amount)
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{
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for(auto ¬e : NoteMap)
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{
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note = static_cast<uint8>(Clamp(note + amount, NOTE_MIN, NOTE_MAX));
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}
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}
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uint8 ModInstrument::GetMIDIChannel(const ModChannel &channel, CHANNELINDEX chn) const
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{
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// For mapped channels, return their pattern channel, modulo 16 (because there are only 16 MIDI channels)
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if(nMidiChannel == MidiMappedChannel)
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return static_cast<uint8>((channel.nMasterChn ? (channel.nMasterChn - 1u) : chn) % 16u);
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else if(HasValidMIDIChannel())
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return (nMidiChannel - MidiFirstChannel) % 16u;
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else
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return 0;
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}
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OPENMPT_NAMESPACE_END
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