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stk::RtWvOut Class Reference

STK realtime audio (blocking) output class. More...

`#include <RtWvOut.h>`

Inheritance diagram for stk::RtWvOut:

## Public Member Functions
| RtWvOut (unsigned int nChannels=1, StkFloat sampleRate=Stk::sampleRate(), int device=0, int bufferFrames=RT_BUFFER_SIZE, int nBuffers=20)
| Default constructor.
| ~RtWvOut ()
| Class destructor.
void | start (void)
| Start the audio output stream.
void | stop (void)
| Stop the audio output stream.
void | tick (const StkFloat sample)
| Output a single sample to all channels in a sample frame.
void | tick (const StkFrames &frames)
| Output the StkFrames data.
Public Member Functions inherited from stk::WvOut
| WvOut (void)
| Default constructor.
unsigned long | getFrameCount (void) const
| Return the number of sample frames output.
StkFloat | getTime (void) const
| Return the number of seconds of data output.
bool | clipStatus (void)
| Returns `true` if clipping has been detected during output since instantiation or the last reset.
void | resetClipStatus (void)
| Reset the clipping status to `false`.
virtual void | tick (const StkFloat sample)=0
| Output a single sample to all channels in a sample frame.
virtual void | tick (const StkFrames &frames)=0
| Output the StkFrames data.
Public Member Functions inherited from stk::Stk
void | ignoreSampleRateChange (bool ignore=true)
| A function to enable/disable the automatic updating of class data when the STK sample rate changes.

## Additional Inherited Members
Static Public Member Functions inherited from stk::Stk
static StkFloat | sampleRate (void)
| Static method that returns the current STK sample rate.
static void | setSampleRate (StkFloat rate)
| Static method that sets the STK sample rate.
static void | clear_alertList ()
| Static method that frees memory from alertList_.
static std::string | rawwavePath (void)
| Static method that returns the current rawwave path.
static void | setRawwavePath (std::string path)
| Static method that sets the STK rawwave path.
static void | swap16 (unsigned char *ptr)
| Static method that byte-swaps a 16-bit data type.
static void | swap32 (unsigned char *ptr)
| Static method that byte-swaps a 32-bit data type.
static void | swap64 (unsigned char *ptr)
| Static method that byte-swaps a 64-bit data type.
static void | sleep (unsigned long milliseconds)
| Static cross-platform method to sleep for a number of milliseconds.
static bool | inRange (StkFloat value, StkFloat min, StkFloat max)
| Static method to check whether a value is within a specified range.
static void | handleError (const char *message, StkError::Type type)
| Static function for error reporting and handling using c-strings.
static void | handleError (std::string message, StkError::Type type)
| Static function for error reporting and handling using c++ strings.
static void | showWarnings (bool status)
| Toggle display of WARNING and STATUS messages.
static void | printErrors (bool status)
| Toggle display of error messages before throwing exceptions.
Static Public Attributes inherited from stk::Stk
static const StkFormat | STK_SINT8
static const StkFormat | STK_SINT16
static const StkFormat | STK_SINT24
static const StkFormat | STK_SINT32
static const StkFormat | STK_FLOAT32
static const StkFormat | STK_FLOAT64
Protected Member Functions inherited from stk::Stk
| Stk (void)
| Default constructor.
virtual | ~Stk (void)
| Class destructor.
virtual void | sampleRateChanged (StkFloat newRate, StkFloat oldRate)
| This function should be implemented in subclasses that depend on the sample rate.
void | addSampleRateAlert (Stk *ptr)
| Add class pointer to list for sample rate change notification.
void | removeSampleRateAlert (Stk *ptr)
| Remove class pointer from list for sample rate change notification.
void | handleError (StkError::Type type) const
| Internal function for error reporting that assumes message in `oStream_` variable.

## Detailed Description

STK realtime audio (blocking) output class.

This class provides a simplified interface to RtAudio for realtime audio output. It is a subclass of WvOut. This class makes use of RtAudio's callback functionality by creating a large ring-buffer into which data is written. This class should not be used when low-latency is desired.

RtWvOut supports multi-channel data in interleaved format. It is important to distinguish the tick() method that outputs a single sample to all channels in a sample frame from the overloaded one that takes a reference to an StkFrames object for multi-channel and/or multi-frame data.

by Perry R. Cook and Gary P. Scavone, 1995–2021.

## Constructor & Destructor Documentation

## ◆ RtWvOut()

stk::RtWvOut::RtWvOut | ( | unsigned int | nChannels = `1`,
|  | StkFloat | sampleRate = `Stk::sampleRate()`,
|  | int | device = `0`,
|  | int | bufferFrames = `RT_BUFFER_SIZE`,
|  | int | nBuffers = `20`
| ) |  |

Default constructor.

The default device argument value (zero) will select the default output device on your system. The first device enumerated by the underlying audio API is specified with a value of one. The default buffer size of RT_BUFFER_SIZE is defined in Stk.h. An StkError will be thrown if an error occurs duing instantiation.

## Member Function Documentation

## ◆ start()

void stk::RtWvOut::start | ( | void |  | ) |

Start the audio output stream.

The stream is started automatically, if necessary, when a tick() method is called.

## ◆ stop()

void stk::RtWvOut::stop | ( | void |  | ) |

Stop the audio output stream.

It may be necessary to use this method to avoid undesireable audio buffer cycling if you wish to temporarily stop audio output.

## ◆ tick() [1/2]

void stk::RtWvOut::tick | ( | const StkFloat | sample | ) |
| virtual

Output a single sample to all channels in a sample frame.

If the device is "stopped", it is "started".

Implements stk::WvOut.

## ◆ tick() [2/2]

void stk::RtWvOut::tick | ( | const StkFrames & | frames | ) |
| virtual

Output the StkFrames data.

If the device is "stopped", it is "started". The number of channels in the StkFrames argument must equal the number of channels specified during instantiation. However, this is only checked if STK_DEBUG is defined during compilation, in which case an incompatibility will trigger an StkError exception.

Implements stk::WvOut.

The documentation for this class was generated from the following file:

- RtWvOut.h

The Synthesis ToolKit in C++ (STK)
©1995--2021 Perry R. Cook and Gary P. Scavone. All Rights Reserved.