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Double check for correct normalization

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This commit is contained in:
Thomas Mueller
2021-01-02 23:08:05 +01:00
committed by Oskar Wallgren
parent 04d696a1e9
commit 4107bc02b9
1 changed files with 13 additions and 2 deletions
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15
plugins/bit_invader/bit_invader.cpp
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@@ -45,6 +45,7 @@
#include "plugin_export.h"
static const int wavetableSize = 200;
static const float defaultNormalizationFactor = 1.0f;
extern "C"
{
@@ -77,7 +78,17 @@ bSynth::bSynth( float * _shape, NotePlayHandle * _nph, bool _interpolation,
sample_shape = new float[wavetableSize];
for (int i=0; i < wavetableSize; ++i)
{
sample_shape[i] = _shape[i] * _factor;
float buf = _shape[i] * _factor;
/* Double check that normalization has been performed correctly,
i.e., the absolute value of all samples is <= 1.0 if _factor
is different to the default normalization factor. If there is
a value > 1.0, clip the sample to 1.0 to limit the range. */
if ((_factor != defaultNormalizationFactor) && (fabsf(buf) > 1.0f))
{
buf = (buf < 0) ? -1.0f : 1.0f;
}
sample_shape[i] = buf;
}
}
@@ -273,7 +284,7 @@ void bitInvader::playNote( NotePlayHandle * _n,
float factor;
if( !m_normalize.value() )
{
factor = 1.0f;
factor = defaultNormalizationFactor;
}
else
{