Audaspace 1.4.0
A high level audio library.
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Public Member Functions | List of all members
TriangleReader Class Reference

This class is used for sawtooth tone playback. More...

#include <TriangleReader.h>

Inheritance diagram for TriangleReader:
Inheritance graph
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Public Member Functions

 TriangleReader (float frequency, SampleRate sampleRate)
 Creates a new reader.
 
void setFrequency (float frequency)
 Sets the frequency of the wave.
 
virtual bool isSeekable () const
 Tells whether the source provides seeking functionality or not.
 
virtual void seek (int position)
 Seeks to a specific position in the source.
 
virtual int getLength () const
 Returns an approximated length of the source in samples.
 
virtual int getPosition () const
 Returns the position of the source as a sample count value.
 
virtual Specs getSpecs () const
 Returns the specification of the reader.
 
virtual void read (int &length, bool &eos, sample_t *buffer)
 Request to read the next length samples out of the source.
 
- Public Member Functions inherited from IReader
virtual ~IReader ()
 Destroys the reader.
 
virtual bool isSeekable () const =0
 Tells whether the source provides seeking functionality or not.
 
virtual void seek (int position)=0
 Seeks to a specific position in the source.
 
virtual int getLength () const =0
 Returns an approximated length of the source in samples.
 
virtual int getPosition () const =0
 Returns the position of the source as a sample count value.
 
virtual Specs getSpecs () const =0
 Returns the specification of the reader.
 
virtual void read (int &length, bool &eos, sample_t *buffer)=0
 Request to read the next length samples out of the source.
 

Detailed Description

This class is used for sawtooth tone playback.

The output format is in the 16 bit format and stereo, the sample rate can be specified. As the two channels both play the same the output could also be mono, but in most cases this will result in having to resample for output, so stereo sound is created directly.

Constructor & Destructor Documentation

◆ TriangleReader()

TriangleReader::TriangleReader ( float  frequency,
SampleRate  sampleRate 
)

Creates a new reader.

Parameters
frequencyThe frequency of the sine wave.
sampleRateThe output sample rate.

Member Function Documentation

◆ getLength()

virtual int TriangleReader::getLength ( ) const
virtual

Returns an approximated length of the source in samples.

Returns
The length as sample count. May be negative if unknown.

Implements IReader.

◆ getPosition()

virtual int TriangleReader::getPosition ( ) const
virtual

Returns the position of the source as a sample count value.

Returns
The current position in the source. A negative value indicates that the position is unknown.
Warning
The value returned doesn't always have to be correct for readers, especially after seeking.

Implements IReader.

◆ getSpecs()

virtual Specs TriangleReader::getSpecs ( ) const
virtual

Returns the specification of the reader.

Returns
The Specs structure.

Implements IReader.

◆ isSeekable()

virtual bool TriangleReader::isSeekable ( ) const
virtual

Tells whether the source provides seeking functionality or not.

Warning
This doesn't mean that the seeking always has to succeed.
Returns
Always returns true for readers of buffering types.

Implements IReader.

◆ read()

virtual void TriangleReader::read ( int &  length,
bool &  eos,
sample_t buffer 
)
virtual

Request to read the next length samples out of the source.

The buffer supplied has the needed size.

Parameters
[in,out]lengthThe count of samples that should be read. Shall contain the real count of samples after reading, in case there were only fewer samples available. A smaller value also indicates the end of the reader.
[out]eosEnd of stream, whether the end is reached or not.
[in]bufferThe pointer to the buffer to read into.

Implements IReader.

◆ seek()

virtual void TriangleReader::seek ( int  position)
virtual

Seeks to a specific position in the source.

Parameters
positionThe position to seek for measured in samples. To get from a given time to the samples you simply have to multiply the time value in seconds with the sample rate of the reader.
Warning
This may work or not, depending on the actual reader.

Implements IReader.

◆ setFrequency()

void TriangleReader::setFrequency ( float  frequency)

Sets the frequency of the wave.

Parameters
frequencyThe new frequency in Hertz.

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