mirror of
https://github.com/thestk/stk
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75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/***************************************************/
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/*! \class RtWvIn
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\brief STK realtime audio (blocking) input class.
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This class provides a simplified interface to RtAudio for realtime
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audio input. It is a subclass of WvIn. Because this class makes
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use of RtAudio's blocking output routines, its performance is less
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robust on systems where the audio API is callback-based (Macintosh
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CoreAudio and Windows ASIO).
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RtWvIn supports multi-channel data in interleaved format. It is
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important to distinguish the tick() methods, which return samples
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produced by averaging across sample frames, from the tickFrame()
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methods, which return references or pointers to multi-channel
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sample frames.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
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*/
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/***************************************************/
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#ifndef STK_RTWVIN_H
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#define STK_RTWVIN_H
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#include "WvIn.h"
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#include "RtAudio.h"
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class RtWvIn : public WvIn
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{
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public:
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//! Default constructor.
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/*!
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The \e device argument is passed to RtAudio during
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instantiation. The default value (zero) will select the default
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device on your system or the first device found meeting the
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specified parameters. On systems with multiple
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soundcards/devices, values greater than zero can be specified in
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accordance with the order that the devices are enumerated by the
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underlying audio API. The default buffer size of RT_BUFFER_SIZE
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is defined in Stk.h. An StkError will be thrown if an error
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occurs duing instantiation.
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*/
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RtWvIn( unsigned int nChannels = 1, StkFloat sampleRate = Stk::sampleRate(),
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int device = 0, int bufferFrames = RT_BUFFER_SIZE, int nBuffers = 4 );
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//! Class destructor.
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~RtWvIn();
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//! Start the audio input stream.
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/*!
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The stream is started automatically, if necessary, when a
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tick() or tickFrame() method is called.
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*/
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void start( void );
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//! Stop the audio input stream.
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/*!
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It may be necessary to use this method to avoid audio underflow
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problems if you wish to temporarily stop audio input.
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*/
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void stop( void );
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protected:
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void computeFrame( void );
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RtAudio *adc_;
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StkFloat *buffer_;
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bool stopped_;
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unsigned int bufferFrames_;
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unsigned int bufferIndex_;
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};
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#endif
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