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BandLimitedWave: provide wavetables as pre-generated "bin" files, these will be installed under datadir/wavetables

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The runtime-generation is still there as a fallback, and the file generation code is left in as commented-out, because
it might be needed in the future
This commit is contained in:
Vesa
2014-04-25 19:17:41 +03:00
parent f4a8df7c67
commit 9b9e175925
8 changed files with 228 additions and 99 deletions
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65
include/BandLimitedWave.h
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@@ -26,6 +26,11 @@
#ifndef BANDLIMITEDWAVE_H
#define BANDLIMITEDWAVE_H
#include <QString>
#include <QDataStream>
#include <QFile>
#include "config_mgr.h"
#include "interpolation.h"
#include "lmms_basics.h"
#include "lmms_math.h"
@@ -50,26 +55,54 @@ const int TLENS[MAXTBL+1] = { 2 << 0, 3 << 0, 2 << 1, 3 << 1,
typedef struct
{
public:
inline sample_t sampleAt( int _table, int _ph )
inline sample_t sampleAt( int table, int ph )
{
if( _table % 2 == 0 )
{ return m_data[ TLENS[ _table ] + _ph ]; }
if( table % 2 == 0 )
{ return m_data[ TLENS[ table ] + ph ]; }
else
{ return m_data3[ TLENS[ _table ] + _ph ]; }
{ return m_data3[ TLENS[ table ] + ph ]; }
}
inline void setSampleAt( int _table, int _ph, sample_t _sample )
inline void setSampleAt( int table, int ph, sample_t sample )
{
if( _table % 2 == 0 )
{ m_data[ TLENS[ _table ] + _ph ] = _sample; }
if( table % 2 == 0 )
{ m_data[ TLENS[ table ] + ph ] = sample; }
else
{ m_data3[ TLENS[ _table ] + _ph ] = _sample; }
{ m_data3[ TLENS[ table ] + ph ] = sample; }
}
private:
sample_t m_data [ MIPMAPSIZE ];
sample_t m_data3 [ MIPMAPSIZE3 ];
} WaveMipMap;
QDataStream& operator<< ( QDataStream &out, WaveMipMap &waveMipMap )
{
for( int tbl = 0; tbl <= MAXTBL; tbl++ )
{
for( int i = 0; i < TLENS[tbl]; i++ )
{
out << waveMipMap.sampleAt( tbl, i );
}
}
return out;
}
QDataStream& operator>> ( QDataStream &in, WaveMipMap &waveMipMap )
{
sample_t sample;
for( int tbl = 0; tbl <= MAXTBL; tbl++ )
{
for( int i = 0; i < TLENS[tbl]; i++ )
{
in >> sample;
waveMipMap.setSampleAt( tbl, i, sample );
}
}
return in;
}
class BandLimitedWave
{
public:
@@ -88,22 +121,22 @@ public:
/*! \brief This method converts frequency to wavelength. The oscillate function takes wavelength as argument so
* use this to convert your note frequency to wavelength before using it.
*/
static inline float freqToLen( float _f )
static inline float freqToLen( float f )
{
return freqToLen( _f, engine::mixer()->processingSampleRate() );
return freqToLen( f, engine::mixer()->processingSampleRate() );
}
/*! \brief This method converts frequency to wavelength, but you can use any custom sample rate with it.
*/
static inline float freqToLen( float _f, sample_rate_t _sr )
static inline float freqToLen( float f, sample_rate_t sr )
{
return static_cast<float>( _sr ) / _f;
return static_cast<float>( sr ) / f;
}
/*! \brief This method converts phase delta to wavelength. It assumes a phase scale of 0 to 1. */
static inline float pdToLen( float _pd )
static inline float pdToLen( float pd )
{
return 1.0f / _pd;
return 1.0f / pd;
}
/*! \brief This method provides interpolated samples of bandlimited waveforms.
@@ -189,8 +222,10 @@ public:
static void generateWaves();
static bool s_wavesGenerated;
static WaveMipMap s_waveforms [NumBLWaveforms];
static QString s_wavetableDir;
};