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Move the stateful region value computations in a separate file
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| Original file line number | Diff line number | Diff line change |
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| // SPDX-License-Identifier: BSD-2-Clause | ||
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| // This code is part of the sfizz library and is licensed under a BSD 2-clause | ||
| // license. You should have receive a LICENSE.md file along with the code. | ||
| // If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz | ||
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| #include "RegionStateful.h" | ||
| #include "ModifierHelpers.h" | ||
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| namespace sfz { | ||
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| float getBaseVolumedB(const Region& region, const MidiState& midiState, int noteNumber) noexcept | ||
| { | ||
| fast_real_distribution<float> volumeDistribution { 0.0f, region.ampRandom }; | ||
| auto baseVolumedB = region.volume + volumeDistribution(Random::randomGenerator); | ||
| baseVolumedB += region.globalVolume; | ||
| baseVolumedB += region.masterVolume; | ||
| baseVolumedB += region.groupVolume; | ||
| if (region.trigger == Trigger::release || region.trigger == Trigger::release_key) | ||
| baseVolumedB -= region.rtDecay * midiState.getNoteDuration(noteNumber); | ||
| return baseVolumedB; | ||
| } | ||
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| uint64_t getOffset(const Region& region, const MidiState& midiState) noexcept | ||
| { | ||
| std::uniform_int_distribution<int64_t> offsetDistribution { 0, region.offsetRandom }; | ||
| uint64_t finalOffset = region.offset + offsetDistribution(Random::randomGenerator); | ||
| for (const auto& mod: region.offsetCC) | ||
| finalOffset += static_cast<uint64_t>(mod.data * midiState.getCCValue(mod.cc)); | ||
| return Default::offset.bounds.clamp(finalOffset); | ||
| } | ||
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| float getDelay(const Region& region, const MidiState& midiState) noexcept | ||
| { | ||
| fast_real_distribution<float> delayDistribution { 0, region.delayRandom }; | ||
| float finalDelay { region.delay }; | ||
| finalDelay += delayDistribution(Random::randomGenerator); | ||
| for (const auto& mod: region.delayCC) | ||
| finalDelay += mod.data * midiState.getCCValue(mod.cc); | ||
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| return Default::delay.bounds.clamp(finalDelay); | ||
| } | ||
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| uint32_t getSampleEnd(const Region& region, MidiState& midiState) noexcept | ||
| { | ||
| int64_t end = region.sampleEnd; | ||
| for (const auto& mod: region.endCC) | ||
| end += static_cast<int64_t>(mod.data * midiState.getCCValue(mod.cc)); | ||
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| end = clamp(end, int64_t { 0 }, region.sampleEnd); | ||
| return static_cast<uint32_t>(end); | ||
| } | ||
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| uint32_t loopStart(const Region& region, MidiState& midiState) noexcept | ||
| { | ||
| auto start = region.loopRange.getStart(); | ||
| for (const auto& mod: region.loopStartCC) | ||
| start += static_cast<int64_t>(mod.data * midiState.getCCValue(mod.cc)); | ||
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| start = clamp(start, int64_t { 0 }, region.sampleEnd); | ||
| return static_cast<uint32_t>(start); | ||
| } | ||
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| uint32_t loopEnd(const Region& region, MidiState& midiState) noexcept | ||
| { | ||
| auto end = region.loopRange.getEnd(); | ||
| for (const auto& mod: region.loopEndCC) | ||
| end += static_cast<int64_t>(mod.data * midiState.getCCValue(mod.cc)); | ||
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| end = clamp(end, int64_t { 0 }, region.sampleEnd); | ||
| return static_cast<uint32_t>(end); | ||
| } | ||
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| float getNoteGain(const Region& region, int noteNumber, float velocity, const MidiState& midiState, const CurveSet& curveSet) noexcept | ||
| { | ||
| ASSERT(velocity >= 0.0f && velocity <= 1.0f); | ||
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| float baseGain { 1.0f }; | ||
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| // Amplitude key tracking | ||
| baseGain *= db2mag(region.ampKeytrack * static_cast<float>(noteNumber - region.ampKeycenter)); | ||
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| // Crossfades related to the note number | ||
| baseGain *= crossfadeIn(region.crossfadeKeyInRange, noteNumber, region.crossfadeKeyCurve); | ||
| baseGain *= crossfadeOut(region.crossfadeKeyOutRange, noteNumber, region.crossfadeKeyCurve); | ||
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| // Amplitude velocity tracking | ||
| baseGain *= velocityCurve(region, velocity, midiState, curveSet); | ||
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| // Crossfades related to velocity | ||
| baseGain *= crossfadeIn(region.crossfadeVelInRange, velocity, region.crossfadeVelCurve); | ||
| baseGain *= crossfadeOut(region.crossfadeVelOutRange, velocity, region.crossfadeVelCurve); | ||
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| return baseGain; | ||
| } | ||
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| float getCrossfadeGain(const Region& region, const MidiState& midiState) noexcept | ||
| { | ||
| float gain { 1.0f }; | ||
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| // Crossfades due to CC states | ||
| for (const auto& ccData : region.crossfadeCCInRange) { | ||
| const auto ccValue = midiState.getCCValue(ccData.cc); | ||
| const auto crossfadeRange = ccData.data; | ||
| gain *= crossfadeIn(crossfadeRange, ccValue, region.crossfadeCCCurve); | ||
| } | ||
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| for (const auto& ccData : region.crossfadeCCOutRange) { | ||
| const auto ccValue = midiState.getCCValue(ccData.cc); | ||
| const auto crossfadeRange = ccData.data; | ||
| gain *= crossfadeOut(crossfadeRange, ccValue, region.crossfadeCCCurve); | ||
| } | ||
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| return gain; | ||
| } | ||
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| float velocityCurve(const Region& region, float velocity, const MidiState& midiState, const CurveSet& curveSet) noexcept | ||
| { | ||
| ASSERT(velocity >= 0.0f && velocity <= 1.0f); | ||
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| float gain; | ||
| if (region.velCurve) | ||
| gain = region.velCurve->evalNormalized(velocity); | ||
| else | ||
| gain = velocity * velocity; | ||
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| gain = std::fabs(region.ampVeltrack) * (1.0f - gain); | ||
| gain = (region.ampVeltrack < 0) ? gain : (1.0f - gain); | ||
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| return gain; | ||
| } | ||
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| } |
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