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Better handling of the source position. The integer part and the floating point part are separated, the solution before lost precision in the interpolation for longer samples.

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This commit is contained in:
paulfd 2019-09-15 23:03:40 +02:00
parent 86b59b1b59
commit e6ffec5885
2 changed files with 55 additions and 36 deletions
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84
sfizz/Voice.cpp
View file

@ -94,8 +94,8 @@ void sfz::Voice::startVoice(Region* region, int delay, int channel, int number,
widthEnvelope.reset(width);
// DBG("Base width: " << baseWidth << " - with modifier: " << width);
floatPosition = static_cast<float>(region->getOffset());
// DBG("Offset: " << floatPosition);
sourcePosition = region->getOffset();
// DBG("Offset: " << sourcePosition);
initialDelay = delay + static_cast<uint32_t>(region->getDelay() / sampleRate);
baseFrequency = midiNoteFrequency(number) * pitchRatio;
prepareEGEnvelope(delay, value);
@ -177,17 +177,17 @@ void sfz::Voice::registerCC(int delay, int channel [[maybe_unused]], int ccNumbe
}
if (region->panCC && ccNumber == region->panCC->first) {
const float newPan { basePan + normalizeCC(ccValue) * normalizeNegativePercents(region->panCC->second)};
const float newPan { basePan + normalizeCC(ccValue) * normalizeNegativePercents(region->panCC->second) };
panEnvelope.registerEvent(delay, newPan);
}
if (region->positionCC && ccNumber == region->positionCC->first) {
const float newPosition { basePosition + normalizeCC(ccValue) * normalizeNegativePercents(region->positionCC->second)};
const float newPosition { basePosition + normalizeCC(ccValue) * normalizeNegativePercents(region->positionCC->second) };
positionEnvelope.registerEvent(delay, newPosition);
}
if (region->widthCC && ccNumber == region->widthCC->first) {
const float newWidth { baseWidth + normalizeCC(ccValue) * normalizeNegativePercents(region->widthCC->second)};
const float newWidth { baseWidth + normalizeCC(ccValue) * normalizeNegativePercents(region->widthCC->second) };
widthEnvelope.registerEvent(delay, newWidth);
}
}
@ -244,10 +244,10 @@ void sfz::Voice::renderBlock(AudioSpan<float> buffer) noexcept
processStereo(buffer);
else
processMono(buffer);
if (!egEnvelope.isSmoothing())
reset();
powerHistory.push(buffer.meanSquared());
}
@ -256,7 +256,7 @@ void sfz::Voice::processMono(AudioSpan<float> buffer) noexcept
const auto numSamples = buffer.getNumFrames();
auto leftBuffer = buffer.getSpan(0);
auto rightBuffer = buffer.getSpan(1);
auto span1 = tempSpan1.first(numSamples);
auto span2 = tempSpan2.first(numSamples);
@ -299,7 +299,7 @@ void sfz::Voice::processStereo(AudioSpan<float> buffer) noexcept
// Amplitude envelope
amplitudeEnvelope.getBlock(span1);
buffer.applyGain(span1);
// AmpEG envelope
egEnvelope.getBlock(span1);
buffer.applyGain(span1);
@ -356,33 +356,41 @@ void sfz::Voice::fillWithData(AudioSpan<float> buffer) noexcept
auto rightCoeffs = tempSpan2.first(buffer.getNumFrames());
::fill<float>(jumps, pitchRatio * speedRatio);
jumps[0] += floatPositionOffset;
::cumsum<float>(jumps, jumps);
::sfzInterpolationCast<float>(jumps, indices, leftCoeffs, rightCoeffs);
::add<int>(sourcePosition, indices);
if (region->shouldLoop() && region->trueSampleEnd() <= source.getNumFrames()) {
floatPosition = ::loopingSFZIndex<float, false>(
jumps,
leftCoeffs,
rightCoeffs,
indices,
floatPosition,
region->trueSampleEnd() - 1,
region->loopRange.getStart());
//FIXME : all this casting is driving me crazy
const auto sampleEnd = static_cast<int>(region->trueSampleEnd()) - 1;
if (region->shouldLoop() && static_cast<size_t>(sampleEnd) <= source.getNumFrames()) {
const auto offset = sampleEnd - static_cast<int>(region->loopRange.getStart());
for (auto* index = indices.begin(); index < indices.end(); ++index) {
if (*index > sampleEnd) {
const auto remainingElements = static_cast<size_t>(std::distance(index, indices.end()));
::subtract<int>(offset, { index, remainingElements });
}
}
} else {
floatPosition = ::saturatingSFZIndex<float, false>(
jumps,
leftCoeffs,
rightCoeffs,
indices,
floatPosition,
source.getNumFrames() - 1);
for (auto* index = indices.begin(); index < indices.end(); ++index) {
if (*index > sampleEnd) {
const auto remainingElements = static_cast<size_t>(std::distance(index, indices.end()));
::fill<int>(indices.last(remainingElements), sampleEnd);
::fill<float>(leftCoeffs.last(remainingElements), 0.0f);
::fill<float>(rightCoeffs.last(remainingElements), 1.0f);
break;
}
}
}
auto ind = indices.data();
auto leftCoeff = leftCoeffs.data();
auto rightCoeff = rightCoeffs.data();
auto left = buffer.getChannel(0);
auto leftSource = source.getChannel(0);
if (source.getNumChannels() == 1) {
while (ind < indices.end()) {
*left = source.getChannel(0)[*ind] * (*leftCoeff) + source.getChannel(0)[*ind + 1] * (*rightCoeff);
*left = leftSource[*ind] * (*leftCoeff) + leftSource[*ind + 1] * (*rightCoeff);
left++;
ind++;
leftCoeff++;
@ -390,9 +398,10 @@ void sfz::Voice::fillWithData(AudioSpan<float> buffer) noexcept
}
} else {
auto right = buffer.getChannel(1);
auto rightSource = source.getChannel(1);
while (ind < indices.end()) {
*left = source.getChannel(0)[*ind] * (*leftCoeff) + source.getChannel(0)[*ind + 1] * (*rightCoeff);
*right = source.getChannel(1)[*ind] * (*leftCoeff) + source.getChannel(1)[*ind + 1] * (*rightCoeff);
*left = leftSource[*ind] * (*leftCoeff) + leftSource[*ind + 1] * (*rightCoeff);
*right = rightSource[*ind] * (*leftCoeff) + rightSource[*ind + 1] * (*rightCoeff);
left++;
right++;
ind++;
@ -401,10 +410,14 @@ void sfz::Voice::fillWithData(AudioSpan<float> buffer) noexcept
}
}
if (!region->shouldLoop() && (floatPosition + 1.01) > source.getNumFrames()) {
sourcePosition = indices.back();
floatPositionOffset = rightCoeffs.back();
if (state != State::release && !region->shouldLoop() && sourcePosition == sampleEnd) {
DBG("Releasing " << region->sample);
auto last = std::distance(indices.begin(), absl::c_find(indices, region->trueSampleEnd() - 1));
auto last = std::distance(indices.begin(), absl::c_find(indices, sampleEnd));
release(last);
buffer.subspan(last).fill(0.0f);
}
}
@ -418,6 +431,10 @@ void sfz::Voice::fillWithGenerator(AudioSpan<float> buffer) noexcept
::sin<float>(tempSpan1.first(buffer.getNumFrames()), buffer.getSpan(0));
::copy<float>(buffer.getSpan(0), buffer.getSpan(1));
// Wrap the phase so we don't loose too much precision on longer notes
const auto numTwoPiWraps = static_cast<int>(phase / twoPi<float>);
phase -= twoPi<float> * static_cast<float>(numTwoPiWraps);
}
bool sfz::Voice::checkOffGroup(int delay, uint32_t group) noexcept
@ -458,7 +475,8 @@ void sfz::Voice::reset() noexcept
if (region != nullptr) {
DBG("Reset voice with sample " << region->sample);
}
floatPosition = 0.0f;
sourcePosition = 0;
floatPositionOffset = 0.0f;
region = nullptr;
noteIsOff = false;
}
@ -484,7 +502,7 @@ bool sfz::Voice::canBeStolen() const noexcept
return state == State::release;
}
float sfz::Voice::getSourcePosition() const noexcept
uint32_t sfz::Voice::getSourcePosition() const noexcept
{
return floatPosition;
return sourcePosition;
}

7
sfizz/Voice.h
View file

@ -70,7 +70,7 @@ public:
void garbageCollect() noexcept;
float getMeanSquaredAverage() const noexcept;
float getSourcePosition() const noexcept;
uint32_t getSourcePosition() const noexcept;
private:
void fillWithData(AudioSpan<float> buffer) noexcept;
void fillWithGenerator(AudioSpan<float> buffer) noexcept;
@ -103,8 +103,9 @@ private:
float baseFrequency { 440.0 };
float phase { 0.0f };
float floatPosition { 0.0f };
uint32_t initialDelay { 0 };
float floatPositionOffset { 0.0f };
int sourcePosition { 0 };
int initialDelay { 0 };
std::atomic<bool> dataReady { false };
std::unique_ptr<AudioBuffer<float>> fileData { nullptr };