Audio::SubLoopingAudioStream Class Reference

#include <audiostream.h>

Inheritance diagram for Audio::SubLoopingAudioStream:

Public Member Functions
	SubLoopingAudioStream (SeekableAudioStream *stream, uint loops, const Timestamp loopStart, const Timestamp loopEnd, DisposeAfterUse::Flag disposeAfterUse=DisposeAfterUse::YES)
int	readBuffer (int16 *buffer, const int numSamples)
bool	endOfData () const
bool	endOfStream () const
bool	isStereo () const
int	getRate () const
uint	getCompleteIterations () const
void	setRemainingIterations (uint loops)

Detailed Description

A looping audio stream that features looping of a nested part of the stream.

Note

Currently this implementation stops after the nested loop finishes playback.

Important: This can be merged with SubSeekableAudioStream for playback purposes. To do this, it must be extended to accept a start time.

Constructor & Destructor Documentation

SubLoopingAudioStream()

Audio::SubLoopingAudioStream::SubLoopingAudioStream	(	SeekableAudioStream *	stream,
		uint	loops,
		const Timestamp	loopStart,
		const Timestamp	loopEnd,
		DisposeAfterUse::Flag	disposeAfterUse = DisposeAfterUse::YES
	)

Constructor for a SubLoopingAudioStream.

On creation of the SubLoopingAudioStream object, the underlying stream will be rewound.

Parameters

stream	The stream to loop.
loops	How often the stream should be looped (0 means infinite).
loopStart	Start of the loop (this must be smaller than loopEnd).
loopEnd	End of the loop (thus must be greater than loopStart).
disposeAfterUse	Whether the stream should be disposed when the SubLoopingAudioStream is destroyed.

Member Function Documentation

readBuffer()

int Audio::SubLoopingAudioStream::readBuffer ( int16 *  buffer, const int  numSamples  )

virtual

Fill the given buffer with up to numSamples samples.

Data must be in native endianness, 16 bits per sample, signed. For stereo stream, the buffer will be filled with interleaved left and right channel samples, starting with the left sample. Furthermore, the samples in the left and right are summed up. So if you request 4 samples from a stereo stream, you will get a total of two left channel and two right channel samples.

Returns

The actual number of samples read, or -1 if a critical error occurred.

Note

You must check whether the returned value is less than what you requested. This indicates that the stream is fully used up.

Implements Audio::AudioStream.

endOfData()

bool Audio::SubLoopingAudioStream::endOfData ( ) const

virtual

Check whether end of data has been reached.

If this returns true, it indicates that at this time there is no data available in the stream. However, there might be more data in the future.

This is used by e.g. a rate converter to decide whether to keep on converting data or to stop.

Implements Audio::AudioStream.

endOfStream()

bool Audio::SubLoopingAudioStream::endOfStream ( ) const

virtual

Check whether end of stream has been reached.

If this returns true, it indicates that all data in this stream is used up and no additional data will appear in it in the future.

This is used by the mixer to decide whether a given stream shall be removed from the list of active streams (and thus be destroyed). By default, this maps to endOfData().

Reimplemented from Audio::AudioStream.

isStereo()

bool Audio::SubLoopingAudioStream::isStereo ( ) const

inlinevirtual

Check whether this is a stereo stream.

Implements Audio::AudioStream.

getRate()

int Audio::SubLoopingAudioStream::getRate ( ) const

inlinevirtual

Sample rate of the stream.

Implements Audio::AudioStream.

getCompleteIterations()

uint Audio::SubLoopingAudioStream::getCompleteIterations ( ) const

inlinevirtual

Return the number of loops that the stream has played.

Implements Audio::LoopableAudioStream.

setRemainingIterations()

void Audio::SubLoopingAudioStream::setRemainingIterations ( uint  loops )

inlinevirtual

Set the number of remaining loops the stream should play before stopping.

Implements Audio::LoopableAudioStream.

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

• audio/audiostream.h