be.tarsos.dsp.io

Class PipedAudioStream

java.lang.Object

be.tarsos.dsp.io.PipedAudioStream

public class PipedAudioStream
extends java.lang.Object

An audio file can be used to convert and read from. It uses libAV to convert about any audio format to a one channel PCM stream of a chosen sample rate. There is support for movie files as well, the first audio channel is then used as input. The resource is either a local file or a type of stream supported by libAV (e.g. HTTP streams); For a list of audio decoders the following command is practical:

avconv -decoders | grep -E "^A" | sort
 

A... 8svx_exp             8SVX exponential
A... 8svx_fib             8SVX fibonacci
A... aac                  AAC (Advanced Audio Coding)
A... aac_latm             AAC LATM (Advanced Audio Coding LATM syntax)
...
 

Constructor Summary

Constructors

Constructor and Description
PipedAudioStream(java.lang.String resource)

Method Summary

Modifier and Type	Method and Description
TarsosDSPAudioInputStream	getMonoStream(int targetSampleRate, double startTimeOffset) Return a one channel, signed PCM stream of audio of a defined sample rate.
TarsosDSPAudioInputStream	getMonoStream(int targetSampleRate, double startTimeOffset, double numberOfSeconds) Return a one channel, signed PCM stream of audio of a defined sample rate.
static void	setDecoder(PipeDecoder decoder)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PipedAudioStream

public PipedAudioStream(java.lang.String resource)

Method Detail

setDecoder

public static void setDecoder(PipeDecoder decoder)

getMonoStream

public TarsosDSPAudioInputStream getMonoStream(int targetSampleRate,
                                               double startTimeOffset)

Return a one channel, signed PCM stream of audio of a defined sample rate.

Parameters:

targetSampleRate - The target sample stream.

startTimeOffset - The start time offset.

Returns:

An audio stream which can be used to read samples from.

getMonoStream

public TarsosDSPAudioInputStream getMonoStream(int targetSampleRate,
                                               double startTimeOffset,
                                               double numberOfSeconds)

Return a one channel, signed PCM stream of audio of a defined sample rate.

Parameters:

targetSampleRate - The target sample stream.

startTimeOffset - The start time offset.

numberOfSeconds - the number of seconds to pipe. If negative the stream is processed until end of stream.

Returns:

An audio stream which can be used to read samples from.