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Fixed a bug where large FFTs would fail

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hogliux 2015-09-02 21:44:51 +01:00
parent 7040fd6951
commit 9538d0dfc8
1 changed files with 14 additions and 2 deletions
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16
modules/juce_audio_basics/effects/juce_FFT.cpp
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@ -230,7 +230,13 @@ void FFT::performRealOnlyForwardTransform (float* d) const noexcept
// This can only be called on an FFT object that was created to do forward transforms.
jassert (! config->inverse);
Complex* const scratch = static_cast<Complex*> (alloca (16 + sizeof (Complex) * (size_t) size));
const size_t sizeInBytes = 16 + sizeof (Complex) * (size_t) size;
Complex* scratch = static_cast<Complex*> (alloca (sizeInBytes));
// try malloc if alloca fails
if (scratch == nullptr)
scratch = static_cast<Complex*> (malloc (sizeInBytes));
for (int i = 0; i < size; ++i)
{
@ -246,7 +252,13 @@ void FFT::performRealOnlyInverseTransform (float* d) const noexcept
// This can only be called on an FFT object that was created to do inverse transforms.
jassert (config->inverse);
Complex* const scratch = static_cast<Complex*> (alloca (16 + sizeof (Complex) * (size_t) size));
const size_t sizeInBytes = 16 + sizeof (Complex) * (size_t) size;
Complex* scratch = static_cast<Complex*> (alloca (sizeInBytes));
// try malloc if alloca fails
if (scratch == nullptr)
scratch = static_cast<Complex*> (malloc (sizeInBytes));
perform (reinterpret_cast<const Complex*> (d), scratch);