#include <RtAudio.h>
Public Types | |
typedef unsigned long | RTAUDIO_FORMAT |
typedef int (* | RTAUDIO_CALLBACK )(char *buffer, int bufferSize, void *userData) |
enum | { MAX_SAMPLE_RATES = 14 } |
Public Methods | |
RtAudio () | |
The default constructor. More... | |
RtAudio (int *streamId, int outputDevice, int outputChannels, int inputDevice, int inputChannels, RTAUDIO_FORMAT format, int sampleRate, int *bufferSize, int numberOfBuffers) | |
A constructor which can be used to open a stream during instantiation. More... | |
~RtAudio () | |
The destructor. More... | |
int | openStream (int outputDevice, int outputChannels, int inputDevice, int inputChannels, RTAUDIO_FORMAT format, int sampleRate, int *bufferSize, int numberOfBuffers) |
A public method for opening a stream with the specified parameters. More... | |
void | setStreamCallback (int streamId, RTAUDIO_CALLBACK callback, void *userData) |
A public method which sets a user-defined callback function for a given stream. More... | |
void | cancelStreamCallback (int streamId) |
A public method which cancels a callback process and function for a given stream. More... | |
int | getDeviceCount (void) |
A public method which returns the number of audio devices found. More... | |
void | getDeviceInfo (int device, RTAUDIO_DEVICE *info) |
Fill a user-supplied RTAUDIO_DEVICE structure for a specified device. More... | |
char* const | getStreamBuffer (int streamId) |
A public method which returns a pointer to the buffer for an open stream. More... | |
void | tickStream (int streamId) |
Public method used to trigger processing of input/output data for a stream. More... | |
void | closeStream (int streamId) |
Public method which closes a stream and frees any associated buffers. More... | |
void | startStream (int streamId) |
Public method which starts a stream. More... | |
void | stopStream (int streamId) |
Stop a stream, allowing any samples remaining in the queue to be played out and/or read in. More... | |
void | abortStream (int streamId) |
Stop a stream, discarding any samples remaining in the input/output queue. More... | |
int | streamWillBlock (int streamId) |
Queries a stream to determine whether a call to the tickStream() method will block. More... | |
Static Public Attributes | |
const RTAUDIO_FORMAT | RTAUDIO_SINT8 |
const RTAUDIO_FORMAT | RTAUDIO_SINT16 |
const RTAUDIO_FORMAT | RTAUDIO_SINT24 |
const RTAUDIO_FORMAT | RTAUDIO_SINT32 |
const RTAUDIO_FORMAT | RTAUDIO_FLOAT32 |
const RTAUDIO_FORMAT | RTAUDIO_FLOAT64 |
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The default constructor. Probes the system to make sure at least one audio input/output device is available and determines the api-specific identifier for each device found. An RtError error can be thrown if no devices are found or if a memory allocation error occurs. |
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A constructor which can be used to open a stream during instantiation. The specified output and/or input device identifiers correspond to those enumerated via the getDeviceInfo() method. If device = 0, the default or first available devices meeting the given parameters is selected. If an output or input channel value is zero, the corresponding device value is ignored. When a stream is successfully opened, its identifier is returned via the "streamId" pointer. An RtError can be thrown if no devices are found for the given parameters, if a memory allocation error occurs, or if a driver error occurs.
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The destructor. Stops and closes any open streams and devices and deallocates buffer and structure memory. |
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A public method for opening a stream with the specified parameters. If successful, the opened stream ID is returned. Otherwise, an RtError is thrown.
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A public method which sets a user-defined callback function for a given stream. This method assigns a callback function to a specific, previously opened stream for non-blocking stream functionality. A separate process is initiated, though the user function is called only when the stream is "running" (between calls to the startStream() and stopStream() methods, respectively). The callback process remains active for the duration of the stream and is automatically shutdown when the stream is closed (via the closeStream() method or by object destruction). The callback process can also be shutdown and the user function de-referenced through an explicit call to the cancelStreamCallback() method. Note that a single stream can use only blocking or callback functionality at the same time, though it is possible to alternate modes on the same stream through the use of the setStreamCallback() and cancelStreamCallback() methods (the blocking tickStream() method can be used before a callback is set and/or after a callback is cancelled). An RtError will be thrown for an invalid device argument. |
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A public method which cancels a callback process and function for a given stream. This method shuts down a callback process and de-references the user function for a specific stream. Callback functionality can subsequently be restarted on the stream via the setStreamCallback() method. An RtError will be thrown for an invalid device argument. |
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A public method which returns the number of audio devices found.
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Fill a user-supplied RTAUDIO_DEVICE structure for a specified device. Any device between 0 and getDeviceCount()-1 is valid. If a device is busy or otherwise unavailable, the structure member "probed" has a value of "false". The system default input and output devices are referenced by device identifier = 0. On systems which allow dynamic default device settings, the default devices are not identified by name (specific device enumerations are assigned device identifiers > 0). An RtError will be thrown for an invalid device argument. |
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A public method which returns a pointer to the buffer for an open stream. The user should fill and/or read the buffer data in interleaved format and then call the tickStream() method. An RtError will be thrown for an invalid stream identifier. |
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Public method used to trigger processing of input/output data for a stream. This method blocks until all buffer data is read/written. An RtError will be thrown for an invalid stream identifier or if a driver error occurs. |
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Public method which closes a stream and frees any associated buffers. If an invalid stream identifier is specified, this method issues a warning and returns (an RtError is not thrown). |
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Public method which starts a stream. An RtError will be thrown for an invalid stream identifier or if a driver error occurs. |
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Stop a stream, allowing any samples remaining in the queue to be played out and/or read in. An RtError will be thrown for an invalid stream identifier or if a driver error occurs. |
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Stop a stream, discarding any samples remaining in the input/output queue. An RtError will be thrown for an invalid stream identifier or if a driver error occurs. |
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Queries a stream to determine whether a call to the tickStream() method will block. A return value of 0 indicates that the stream will NOT block. A positive return value indicates the number of sample frames that cannot yet be processed without blocking. |
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Upper 3 bytes of 32-bit integer. |
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Normalized between plus/minus 1.0. |
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Normalized between plus/minus 1.0. |
![]() | ©2001-2002 CCRMA, Stanford University. All Rights Reserved. Maintained by Gary P. Scavone, gary@ccrma.stanford.edu
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