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Sanitize master output

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Replace any inf/nan in master output with zero, to prevent corrupted files/audio.
This commit is contained in:
Vesa
2014-07-13 22:11:17 +03:00
parent e8d80c1ddf
commit e06c281132
3 changed files with 24 additions and 3 deletions
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2
include/MixHelpers.h
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@@ -39,6 +39,8 @@ void add( sampleFrame* dst, const sampleFrame* src, int frames );
/*! \brief Add samples from src multiplied by coeffSrc to dst */
void addMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffSrc, int frames );
/*! \brief Same as addMultiplied, but sanitize output (strip out infs/nans) */
void addSanitizedMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffSrc, int frames );
/*! \brief Add samples from src multiplied by coeffSrcLeft/coeffSrcRight to dst */
void addMultipliedStereo( sampleFrame* dst, const sampleFrame* src, float coeffSrcLeft, float coeffSrcRight, int frames );

2
src/core/FxMixer.cpp
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@@ -506,7 +506,7 @@ void FxMixer::masterMix( sampleFrame * _buf )
//m_sendsMutex.unlock();
const float v = m_fxChannels[0]->m_volumeModel.value();
MixHelpers::addMultiplied( _buf, m_fxChannels[0]->m_buffer, v, fpp );
MixHelpers::addSanitizedMultiplied( _buf, m_fxChannels[0]->m_buffer, v, fpp );
m_fxChannels[0]->m_peakLeft *= engine::mixer()->masterGain();
m_fxChannels[0]->m_peakRight *= engine::mixer()->masterGain();

23
src/core/MixHelpers.cpp
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@@ -22,8 +22,7 @@
*
*/
#include <math.h>
#include "lmms_math.h"
#include "MixHelpers.h"
@@ -106,6 +105,26 @@ void addMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffSrc, in
struct AddSanitizedMultipliedOp
{
AddSanitizedMultipliedOp( float coeff ) : m_coeff( coeff ) { }
void operator()( sampleFrame& dst, const sampleFrame& src ) const
{
dst[0] += ( isinff( src[0] ) || isnanf( src[0] ) ) ? 0.0f : src[0] * m_coeff;
dst[1] += ( isinff( src[1] ) || isnanf( src[1] ) ) ? 0.0f : src[1] * m_coeff;
}
const float m_coeff;
};
void addSanitizedMultiplied( sampleFrame* dst, const sampleFrame* src, float coeffSrc, int frames )
{
run<>( dst, src, frames, AddSanitizedMultipliedOp(coeffSrc) );
}
struct AddMultipliedStereoOp
{
AddMultipliedStereoOp( float coeffLeft, float coeffRight )