javaclient
Class AudioInterface

java.lang.Object
  javaclient.PlayerDevice
      javaclient.AudioInterface

public class AudioInterface
extends PlayerDevice

The audio interface is used to control sound hardware, if equipped.

Version:

• v1.6.3 - Player 1.6.3 (all interfaces) supported
• v1.6.2 - Player 1.6.2 supported, Javadoc documentation, several bugfixes
• v1.5a - Player 1.5 supported (most popular devices)

Author:

Maxim A. Batalin, Esben H. Ostergaard & Radu Bogdan Rusu

Field Summary

Fields inherited from class javaclient.PlayerDevice

device, DIFFERENCE_SYNCH_FACTOR, index, is, os, pc, PLAYER_MAX_REQREP_SIZE, PLAYER_STXX, reserved, size, t_sec, t_usec, ts_sec, ts_usec

Constructor Summary

AudioInterface(PlayerClient pc, short indexOfDevice)
Constructor for AudioInterface.

Method Summary

int[]	getFiveHighestAmplitudes() Returns the five highest amplitudes.
int[]	getFiveHighestFrequencies() Returns the five highest frequencies.
void	produceSound(short freq, short amp, short duration) The audio interface accepts commands to produce fixed-frequency tones through /dev/dsp (which is assumed to be associated with a sound card to which a speaker is attached).
void	readData() The audio interface reads the audio stream from /dev/audio (which is assumed to be associated with a sound card connected to a microphone) and performs some analysis on it.

Methods inherited from class javaclient.PlayerDevice

getTimeForDataSampled_sec, getTimeForDataSampled_usec, getTimeForDataSampled, getTimeForDataSent_sec, getTimeForDataSent_usec, getTimeForDataSent, handleEARMessage, handleNARMessage, handleResponse, readHeader, sendHeader

Methods inherited from class java.lang.Object

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

Constructor Detail

AudioInterface

public AudioInterface(PlayerClient pc,
                      short indexOfDevice)

Constructor for AudioInterface.

Parameters:

pc - a reference to the PlayerClient object

indexOfDevice - the index of the device

Method Detail

readData

public void readData()

The audio interface reads the audio stream from /dev/audio (which is assumed to be associated with a sound card connected to a microphone) and performs some analysis on it. Five frequency/amplitude pairs are then returned as data.

Overrides:

readData in class PlayerDevice

getFiveHighestFrequencies

public int[] getFiveHighestFrequencies()

Returns the five highest frequencies.

Returns:

an array filled with the highest five frequencies

getFiveHighestAmplitudes

public int[] getFiveHighestAmplitudes()

Returns the five highest amplitudes.

Returns:

an array filled with the highest five amplitudes

produceSound

public void produceSound(short freq,
                         short amp,
                         short duration)

The audio interface accepts commands to produce fixed-frequency tones through /dev/dsp (which is assumed to be associated with a sound card to which a speaker is attached).

Parameters:

freq - frequency to play (Hz?)

amp - amplitude to play (dB?)

duration - duration to play (sec?)