mirror of
https://github.com/thestk/stk
synced 2026-01-14 13:31:53 +00:00
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/***************************************************/
|
|
/*! \class RtWvOut
|
|
\brief STK realtime audio (blocking) output class.
|
|
|
|
This class provides a simplified interface to RtAudio for realtime
|
|
audio output. It is a subclass of WvOut. Because this class
|
|
makes use of RtAudio's blocking output routines, its performance
|
|
is less robust on systems where the audio API is callback-based
|
|
(Macintosh CoreAudio and Windows ASIO).
|
|
|
|
RtWvOut supports multi-channel data in interleaved format. It is
|
|
important to distinguish the tick() methods, which output single
|
|
samples to all channels in a sample frame, from the tickFrame()
|
|
method, which take a pointer or reference to multi-channel sample
|
|
frame data.
|
|
|
|
by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
|
|
*/
|
|
/***************************************************/
|
|
|
|
#ifndef STK_RTWVOUT_H
|
|
#define STK_RTWVOUT_H
|
|
|
|
#include "WvOut.h"
|
|
#include "RtAudio.h"
|
|
|
|
class RtWvOut : public WvOut
|
|
{
|
|
public:
|
|
|
|
//! Default constructor.
|
|
/*!
|
|
The \e device argument is passed to RtAudio during
|
|
instantiation. The default value (zero) will select the default
|
|
device on your system or the first device found meeting the
|
|
specified parameters. On systems with multiple
|
|
soundcards/devices, values greater than zero can be specified in
|
|
accordance with the order that the devices are enumerated by the
|
|
underlying audio API. The default buffer size of RT_BUFFER_SIZE
|
|
is defined in Stk.h. An StkError will be thrown if an error
|
|
occurs duing instantiation.
|
|
*/
|
|
RtWvOut( unsigned int nChannels = 1, StkFloat sampleRate = Stk::sampleRate(),
|
|
int device = 0, int bufferFrames = RT_BUFFER_SIZE, int nBuffers = 4 );
|
|
|
|
//! Class destructor.
|
|
~RtWvOut();
|
|
|
|
//! Start the audio output stream.
|
|
/*!
|
|
The stream is started automatically, if necessary, when a
|
|
tick() or tickFrame method is called.
|
|
*/
|
|
void start(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.
|
|
*/
|
|
void stop(void);
|
|
|
|
protected:
|
|
|
|
void computeSample( const StkFloat sample );
|
|
|
|
void computeFrames( const StkFrames& frames );
|
|
|
|
void incrementFrame( void );
|
|
|
|
RtAudio *dac_;
|
|
StkFloat *buffer_;
|
|
bool stopped_;
|
|
unsigned int nChannels_;
|
|
unsigned int bufferIndex_;
|
|
unsigned int iBuffer_;
|
|
unsigned int bufferFrames_;
|
|
|
|
};
|
|
|
|
#endif
|