/usr/include/stk/Noise.h is in libstk0-dev 4.4.4-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | #ifndef STK_NOISE_H
#define STK_NOISE_H
#include "Generator.h"
#include <stdlib.h>
namespace stk {
/***************************************************/
/*! \class Noise
\brief STK noise generator.
Generic random number generation using the
C rand() function. The quality of the rand()
function varies from one OS to another.
by Perry R. Cook and Gary P. Scavone, 1995-2012.
*/
/***************************************************/
class Noise : public Generator
{
public:
//! Default constructor that can also take a specific seed value.
/*!
If the seed value is zero (the default value), the random number generator is
seeded with the system time.
*/
Noise( unsigned int seed = 0 );
//! Seed the random number generator with a specific seed value.
/*!
If no seed is provided or the seed value is zero, the random
number generator is seeded with the current system time.
*/
void setSeed( unsigned int seed = 0 );
//! Return the last computed output value.
StkFloat lastOut( void ) const { return lastFrame_[0]; };
//! Compute and return one output sample.
StkFloat tick( void );
//! Fill a channel of the StkFrames object with computed outputs.
/*!
The \c channel argument must be less than the number of
channels in the StkFrames argument (the first channel is specified
by 0). However, range checking is only performed if _STK_DEBUG_
is defined during compilation, in which case an out-of-range value
will trigger an StkError exception.
*/
StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
protected:
};
inline StkFloat Noise :: tick( void )
{
return lastFrame_[0] = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
}
inline StkFrames& Noise :: tick( StkFrames& frames, unsigned int channel )
{
#if defined(_STK_DEBUG_)
if ( channel >= frames.channels() ) {
oStream_ << "Noise::tick(): channel and StkFrames arguments are incompatible!";
handleError( StkError::FUNCTION_ARGUMENT );
}
#endif
StkFloat *samples = &frames[channel];
unsigned int hop = frames.channels();
for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
*samples = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
lastFrame_[0] = *(samples-hop);
return frames;
}
} // stk namespace
#endif
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