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Corrected the multiplicative envelope logic

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The previous version alternatively cleared or ignored messages
every other block
This commit is contained in:
Paul Ferrand 2019-12-17 21:12:11 +01:00
parent f34d96b46c
commit 6c2f5b5ecb
2 changed files with 31 additions and 9 deletions
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21
src/sfizz/EventEnvelopes.cpp
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@ -57,7 +57,9 @@ void EventEnvelope<Type>::setFunction(std::function<Type(Type)> function)
template <class Type>
void EventEnvelope<Type>::registerEvent(int timestamp, Type inputValue)
{
if (resetEvents)
clear();
if (static_cast<int>(events.size()) < maxCapacity)
events.emplace_back(timestamp, function(inputValue));
}
@ -65,14 +67,14 @@ void EventEnvelope<Type>::registerEvent(int timestamp, Type inputValue)
template <class Type>
void EventEnvelope<Type>::prepareEvents()
{
if (resetEvents) {
if (resetEvents)
clear();
} else {
absl::c_sort(events, [](const auto& lhs, const auto& rhs) {
return lhs.first < rhs.first;
});
resetEvents = true;
}
absl::c_sort(events, [](const auto& lhs, const auto& rhs) {
return lhs.first < rhs.first;
});
resetEvents = true;
}
template <class Type>
@ -201,7 +203,8 @@ void MultiplicativeEnvelope<Type>::getBlock(absl::Span<Type> output)
}
const auto step = std::exp((std::log(event.second) - std::log(currentValue)) / length);
currentValue = multiplicativeRamp<Type>(output.subspan(index, length), currentValue, step);
multiplicativeRamp<Type>(output.subspan(index, length), currentValue, step);
currentValue = event.second;
index += length;
}

19
tests/EventEnvelopesT.cpp
View file

@ -22,6 +22,8 @@
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "EventEnvelopes.h"
#include "SfzHelpers.h"
#include "Buffer.h"
#include "catch2/catch.hpp"
#include <absl/algorithm/container.h>
#include <absl/types/span.h>
@ -385,3 +387,20 @@ TEST_CASE("[MultiplicativeEnvelope] Going down quantized with 2 steps and starti
envelope.getQuantizedBlock(absl::MakeSpan(output), 2.0f);
REQUIRE(output == expected);
}
TEST_CASE("[MultiplicativeEnvelope] Pitch envelope basic function")
{
sfz::Buffer<float> output { 256 };
sfz::MultiplicativeEnvelope<float> envelope;
envelope.setFunction([](float pitchValue){
const auto normalizedBend = sfz::normalizeBend(pitchValue);
const auto bendInCents = normalizedBend * 200;
return sfz::centsFactor(bendInCents);
});
envelope.reset(0);
envelope.getBlock(absl::MakeSpan(output));
REQUIRE(output[255] == 1.0_a);
envelope.registerEvent(252, -6020);
envelope.getBlock(absl::MakeSpan(output));
REQUIRE(output[255] == Approx(0.9168).epsilon(0.01));
}