RtAudio WWW site: http://www.music.mcgill.ca/~gary/rtaudio/
RtAudio: realtime audio i/o C++ classes
- Copyright (c) 2001-2011 Gary P. Scavone
+ Copyright (c) 2001-2013 Gary P. Scavone
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
\file RtAudio.h
*/
-// RtAudio: Version 4.0.10
-
#ifndef __RTAUDIO_H
#define __RTAUDIO_H
#include <string>
#include <vector>
-#include "RtError.h"
+#include <exception>
+#include <iostream>
+
+// RtAudio version
+static const std::string VERSION( "4.1.0pre" );
/*! \typedef typedef unsigned long RtAudioFormat;
\brief RtAudio data format type.
internal routines will automatically take care of any necessary
byte-swapping between the host format and the soundcard. Thus,
endian-ness is not a concern in the following format definitions.
- Note that 24-bit data is expected to be encapsulated in a 32-bit
- format.
- \e RTAUDIO_SINT8: 8-bit signed integer.
- \e RTAUDIO_SINT16: 16-bit signed integer.
- - \e RTAUDIO_SINT24: Lower 3 bytes of 32-bit signed integer.
+ - \e RTAUDIO_SINT24: 24-bit signed integer.
- \e RTAUDIO_SINT32: 32-bit signed integer.
- \e RTAUDIO_FLOAT32: Normalized between plus/minus 1.0.
- \e RTAUDIO_FLOAT64: Normalized between plus/minus 1.0.
typedef unsigned long RtAudioFormat;
static const RtAudioFormat RTAUDIO_SINT8 = 0x1; // 8-bit signed integer.
static const RtAudioFormat RTAUDIO_SINT16 = 0x2; // 16-bit signed integer.
-static const RtAudioFormat RTAUDIO_SINT24 = 0x4; // Lower 3 bytes of 32-bit signed integer.
+static const RtAudioFormat RTAUDIO_SINT24 = 0x4; // 24-bit signed integer.
static const RtAudioFormat RTAUDIO_SINT32 = 0x8; // 32-bit signed integer.
static const RtAudioFormat RTAUDIO_FLOAT32 = 0x10; // Normalized between plus/minus 1.0.
static const RtAudioFormat RTAUDIO_FLOAT64 = 0x20; // Normalized between plus/minus 1.0.
RtAudioStreamStatus status,
void *userData );
+//! RtAudio error callback function prototype.
+/*!
+ \param type Type of error.
+ \param errorText Error description.
+ */
+typedef void (*RtAudioErrorCallback)( RtError::Type type, const std::string &errorText );
// **************************************************************** //
//
//
// **************************************************************** //
+class RtAudioError;
class RtApi;
class RtAudio
enum Api {
UNSPECIFIED, /*!< Search for a working compiled API. */
LINUX_ALSA, /*!< The Advanced Linux Sound Architecture API. */
+ LINUX_PULSE, /*!< The Linux PulseAudio API. */
LINUX_OSS, /*!< The Linux Open Sound System API. */
UNIX_JACK, /*!< The Jack Low-Latency Audio Server API. */
MACOSX_CORE, /*!< Macintosh OS-X Core Audio API. */
: flags(0), numberOfBuffers(0), priority(0) {}
};
+ //! A static function to determine the current RtAudio version.
+ static std::string getVersion( void ) { return VERSION; }
+
//! A static function to determine the available compiled audio APIs.
/*!
The values returned in the std::vector can be compared against
chosen. If the RTAUDIO_MINIMIZE_LATENCY flag bit is set, the
lowest allowable value is used. The actual value used is
returned via the structure argument. The parameter is API dependent.
+ \param errorCallback A client-defined function that will be invoked
+ when an error has occured.
*/
void openStream( RtAudio::StreamParameters *outputParameters,
RtAudio::StreamParameters *inputParameters,
RtAudioFormat format, unsigned int sampleRate,
unsigned int *bufferFrames, RtAudioCallback callback,
- void *userData = NULL, RtAudio::StreamOptions *options = NULL );
+ void *userData = NULL, RtAudio::StreamOptions *options = NULL, RtAudioErrorCallback errorCallback = NULL );
//! A function that closes a stream and frees any associated stream memory.
/*!
typedef unsigned long ThreadHandle;
typedef CRITICAL_SECTION StreamMutex;
-#elif defined(__LINUX_ALSA__) || defined(__UNIX_JACK__) || defined(__LINUX_OSS__) || defined(__MACOSX_CORE__)
+#elif defined(__LINUX_ALSA__) || defined(__LINUX_PULSE__) || defined(__UNIX_JACK__) || defined(__LINUX_OSS__) || defined(__MACOSX_CORE__)
// Using pthread library for various flavors of unix.
#include <pthread.h>
ThreadHandle thread;
void *callback;
void *userData;
+ void *errorCallback;
void *apiInfo; // void pointer for API specific callback information
bool isRunning;
+ bool doRealtime;
+ int priority;
// Default constructor.
CallbackInfo()
- :object(0), callback(0), userData(0), apiInfo(0), isRunning(false) {}
+ :object(0), callback(0), userData(0), errorCallback(0), apiInfo(0), isRunning(false), doRealtime(false) {}
};
// **************************************************************** //
// Note that RtApi is an abstract base class and cannot be
// explicitly instantiated. The class RtAudio will create an
// instance of an RtApi subclass (RtApiOss, RtApiAlsa,
-// RtApiJack, RtApiCore, RtApiAl, RtApiDs, or RtApiAsio).
+// RtApiJack, RtApiCore, RtApiDs, or RtApiAsio).
//
// **************************************************************** //
+#pragma pack(push, 1)
+class S24 {
+
+ protected:
+ unsigned char c3[3];
+
+ public:
+ S24() {}
+
+ S24& operator = ( const int& i ) {
+ c3[0] = (i & 0x000000ff);
+ c3[1] = (i & 0x0000ff00) >> 8;
+ c3[2] = (i & 0x00ff0000) >> 16;
+ return *this;
+ }
+
+ S24( const S24& v ) { *this = v; }
+ S24( const double& d ) { *this = (int) d; }
+ S24( const float& f ) { *this = (int) f; }
+ S24( const signed short& s ) { *this = (int) s; }
+ S24( const char& c ) { *this = (int) c; }
+
+ int asInt() {
+ int i = c3[0] | (c3[1] << 8) | (c3[2] << 16);
+ if (i & 0x800000) i |= ~0xffffff;
+ return i;
+ }
+};
+#pragma pack(pop)
+
#if defined( HAVE_GETTIMEOFDAY )
#include <sys/time.h>
#endif
RtAudio::StreamParameters *inputParameters,
RtAudioFormat format, unsigned int sampleRate,
unsigned int *bufferFrames, RtAudioCallback callback,
- void *userData, RtAudio::StreamOptions *options );
+ void *userData, RtAudio::StreamOptions *options,
+ RtAudioErrorCallback errorCallback );
virtual void closeStream( void );
virtual void startStream( void ) = 0;
virtual void stopStream( void ) = 0;
long getStreamLatency( void );
unsigned int getStreamSampleRate( void );
virtual double getStreamTime( void );
- bool isStreamOpen( void ) const { return stream_.state != STREAM_CLOSED; };
- bool isStreamRunning( void ) const { return stream_.state == STREAM_RUNNING; };
- void showWarnings( bool value ) { showWarnings_ = value; };
+ bool isStreamOpen( void ) const { return stream_.state != STREAM_CLOSED; }
+ bool isStreamRunning( void ) const { return stream_.state == STREAM_RUNNING; }
+ void showWarnings( bool value ) { showWarnings_ = value; }
protected:
enum StreamState {
STREAM_STOPPED,
+ STREAM_STOPPING,
STREAM_RUNNING,
STREAM_CLOSED = -50
};
:apiHandle(0), deviceBuffer(0) { device[0] = 11111; device[1] = 11111; }
};
+ typedef S24 Int24;
typedef signed short Int16;
typedef signed int Int32;
typedef float Float32;
inline bool RtAudio :: isStreamOpen( void ) const throw() { return rtapi_->isStreamOpen(); }
inline bool RtAudio :: isStreamRunning( void ) const throw() { return rtapi_->isStreamRunning(); }
inline long RtAudio :: getStreamLatency( void ) { return rtapi_->getStreamLatency(); }
-inline unsigned int RtAudio :: getStreamSampleRate( void ) { return rtapi_->getStreamSampleRate(); };
+inline unsigned int RtAudio :: getStreamSampleRate( void ) { return rtapi_->getStreamSampleRate(); }
inline double RtAudio :: getStreamTime( void ) { return rtapi_->getStreamTime(); }
inline void RtAudio :: showWarnings( bool value ) throw() { rtapi_->showWarnings( value ); }
RtApiCore();
~RtApiCore();
- RtAudio::Api getCurrentApi( void ) { return RtAudio::MACOSX_CORE; };
+ RtAudio::Api getCurrentApi( void ) { return RtAudio::MACOSX_CORE; }
unsigned int getDeviceCount( void );
RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
unsigned int getDefaultOutputDevice( void );
RtApiJack();
~RtApiJack();
- RtAudio::Api getCurrentApi( void ) { return RtAudio::UNIX_JACK; };
+ RtAudio::Api getCurrentApi( void ) { return RtAudio::UNIX_JACK; }
unsigned int getDeviceCount( void );
RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
void closeStream( void );
RtApiAsio();
~RtApiAsio();
- RtAudio::Api getCurrentApi( void ) { return RtAudio::WINDOWS_ASIO; };
+ RtAudio::Api getCurrentApi( void ) { return RtAudio::WINDOWS_ASIO; }
unsigned int getDeviceCount( void );
RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
void closeStream( void );
RtApiDs();
~RtApiDs();
- RtAudio::Api getCurrentApi( void ) { return RtAudio::WINDOWS_DS; };
+ RtAudio::Api getCurrentApi( void ) { return RtAudio::WINDOWS_DS; }
unsigned int getDeviceCount( void );
unsigned int getDefaultOutputDevice( void );
unsigned int getDefaultInputDevice( void );
bool coInitialized_;
bool buffersRolling;
long duplexPrerollBytes;
+ std::vector<struct DsDevice> dsDevices;
bool probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
unsigned int firstChannel, unsigned int sampleRate,
RtAudioFormat format, unsigned int *bufferSize,
RtApiAlsa();
~RtApiAlsa();
- RtAudio::Api getCurrentApi() { return RtAudio::LINUX_ALSA; };
+ RtAudio::Api getCurrentApi() { return RtAudio::LINUX_ALSA; }
unsigned int getDeviceCount( void );
RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
void closeStream( void );
#endif
+#if defined(__LINUX_PULSE__)
+
+class RtApiPulse: public RtApi
+{
+public:
+ ~RtApiPulse();
+ RtAudio::Api getCurrentApi() { return RtAudio::LINUX_PULSE; }
+ unsigned int getDeviceCount( void );
+ RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
+ void closeStream( void );
+ void startStream( void );
+ void stopStream( void );
+ void abortStream( void );
+
+ // This function is intended for internal use only. It must be
+ // public because it is called by the internal callback handler,
+ // which is not a member of RtAudio. External use of this function
+ // will most likely produce highly undesireable results!
+ void callbackEvent( void );
+
+ private:
+
+ std::vector<RtAudio::DeviceInfo> devices_;
+ void saveDeviceInfo( void );
+ bool probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
+ unsigned int firstChannel, unsigned int sampleRate,
+ RtAudioFormat format, unsigned int *bufferSize,
+ RtAudio::StreamOptions *options );
+};
+
+#endif
+
#if defined(__LINUX_OSS__)
class RtApiOss: public RtApi
RtApiOss();
~RtApiOss();
- RtAudio::Api getCurrentApi() { return RtAudio::LINUX_OSS; };
+ RtAudio::Api getCurrentApi() { return RtAudio::LINUX_OSS; }
unsigned int getDeviceCount( void );
RtAudio::DeviceInfo getDeviceInfo( unsigned int device );
void closeStream( void );
{
public:
- RtApiDummy() { errorText_ = "RtApiDummy: This class provides no functionality."; error( RtError::WARNING ); };
- RtAudio::Api getCurrentApi( void ) { return RtAudio::RTAUDIO_DUMMY; };
- unsigned int getDeviceCount( void ) { return 0; };
- RtAudio::DeviceInfo getDeviceInfo( unsigned int device ) { RtAudio::DeviceInfo info; return info; };
- void closeStream( void ) {};
- void startStream( void ) {};
- void stopStream( void ) {};
- void abortStream( void ) {};
+ RtApiDummy() { errorText_ = "RtApiDummy: This class provides no functionality."; error( RtError::WARNING ); }
+ RtAudio::Api getCurrentApi( void ) { return RtAudio::RTAUDIO_DUMMY; }
+ unsigned int getDeviceCount( void ) { return 0; }
+ RtAudio::DeviceInfo getDeviceInfo( unsigned int /*device*/ ) { RtAudio::DeviceInfo info; return info; }
+ void closeStream( void ) {}
+ void startStream( void ) {}
+ void stopStream( void ) {}
+ void abortStream( void ) {}
private:
- bool probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options ) { return false; };
+ bool probeDeviceOpen( unsigned int /*device*/, StreamMode /*mode*/, unsigned int /*channels*/,
+ unsigned int /*firstChannel*/, unsigned int /*sampleRate*/,
+ RtAudioFormat /*format*/, unsigned int * /*bufferSize*/,
+ RtAudio::StreamOptions * /*options*/ ) { return false; }
+};
+
+#endif
+
+/************************************************************************/
+/*! \class RtError
+ \brief Exception handling class for RtAudio & RtMidi.
+
+ The RtError class is quite simple but it does allow errors to be
+ "caught" by RtError::Type. See the RtAudio and RtMidi
+ documentation to know which methods can throw an RtError.
+
+*/
+/************************************************************************/
+
+class RtAudioError : public std::exception
+{
+ public:
+ //! Defined RtAudioError types.
+ enum Type {
+ WARNING, /*!< A non-critical error. */
+ DEBUG_WARNING, /*!< A non-critical error which might be useful for debugging. */
+ UNSPECIFIED, /*!< The default, unspecified error type. */
+ NO_DEVICES_FOUND, /*!< No devices found on system. */
+ INVALID_DEVICE, /*!< An invalid device ID was specified. */
+ MEMORY_ERROR, /*!< An error occured during memory allocation. */
+ INVALID_PARAMETER, /*!< An invalid parameter was specified to a function. */
+ INVALID_USE, /*!< The function was called incorrectly. */
+ DRIVER_ERROR, /*!< A system driver error occured. */
+ SYSTEM_ERROR, /*!< A system error occured. */
+ THREAD_ERROR /*!< A thread error occured. */
+ };
+
+ //! The constructor.
+ RtAudioError( const std::string& message, Type type = RtAudioError::UNSPECIFIED ) throw() : message_(message), type_(type) {}
+
+ //! The destructor.
+ virtual ~RtAudioError( void ) throw() {}
+
+ //! Prints thrown error message to stderr.
+ virtual void printMessage( void ) const throw() { std::cerr << '\n' << message_ << "\n\n"; }
+
+ //! Returns the thrown error message type.
+ virtual const Type& getType(void) const throw() { return type_; }
+
+ //! Returns the thrown error message string.
+ virtual const std::string& getMessage(void) const throw() { return message_; }
+
+ //! Returns the thrown error message as a c-style string.
+ virtual const char* what( void ) const throw() { return message_.c_str(); }
+
+ protected:
+ std::string message_;
+ Type type_;
};
#endif
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