A B C D E G H I L M N P R S T U W

A

AVG_DETECT_TIME - Static variable in interface Constants

analysisDone(boolean, long) - Method in class UltrasoundListener

Provides a means by which UltrasoundAnalyzer threads can notify this UltrasoundListener class when a block of samples is done being analyzed.

analyze(byte[]) - Method in class UltrasoundAnalyzer

Begin DSP analysis of data in order to determine whether or not ultrasound is present in the set of audio samples.

analyze(double[]) - Method in class UltrasoundDetector

This is the main method of the UltrasoundDetector class and it is used for testing N samples for the presence of the frequency specified by TARGET_FREQUENCY.

analyzerPool - Variable in class UltrasoundListener

analyzerPoolInd - Variable in class UltrasoundListener

analyzing - Variable in class UltrasoundAnalyzer

available() - Method in class UltrasoundAnalyzer

Returns a boolean indicating whether or not this thread object is available to begin analysis of a new data set.

B

BIGEND - Static variable in interface Constants

Broadcaster - class Broadcaster.

This class periodically broadcasts its host computer's room information via 802.11.

Broadcaster() - Constructor for class Broadcaster

This is a default constructor that is provided in the case that an array of bytes containing room-identifying information is not provided.

Broadcaster(byte[]) - Constructor for class Broadcaster

This is the main class constructor.

byteSamples - Variable in class UltrasoundAnalyzer

C

CHANNELS - Variable in class UltrasoundAnalyzer

CHANNELS - Variable in class UltrasoundListener

CONFIG_FILE - Static variable in class ServerBeacon

Constants - interface Constants.

This interface defines several useful constants used throughout the mobile client code for ultrasound detection.

D

DEBOUNCE_VAL - Static variable in interface Constants

DEFAULTMSG - Static variable in class Broadcaster

DatagramListener - class DatagramListener.

The DatagramListener class is a thread that continuously listens for datagram packets, notifying a DatagramUpdateListener object whenever a packet is received.

DatagramListener(DatagramUpdateListener) - Constructor for class DatagramListener

This default DatagramListener class constructor must be supplied with a reference to an object that implements the DatagramUpdateListener interface.

DatagramUpdateListener - interface DatagramUpdateListener.

This interface provides a means by which the DatagramListener class can notify external applications of received datagram messages.

datagramDetected(String, long) - Method in interface DatagramUpdateListener

This method is called by the DatagramListener class when a datagram is received.

datagramDetected(String, long) - Method in class MobileClient

Callback method for the DatagramListener thread that receives notifications of newly received datagram messages.

datagramDetected(String, long) - Method in class TestDatagram

debug - Variable in class Goertzel

debug - Variable in class MobileClient

debug - Variable in class UltrasoundDetector

debug - Variable in class UltrasoundListener

detections - Variable in class MobileClient

dl - Variable in class TestDatagram

E

EOF - Static variable in class ServerBeacon

G

GROUPADDR - Static variable in class Broadcaster

GROUPADDR - Static variable in interface Constants

Goertzel - class Goertzel.

The Goertzel class can be used to perform the Goertzel algorithm.

Goertzel() - Constructor for class Goertzel

Default Constructor.

Goertzel(float, float, int, boolean) - Constructor for class Goertzel

Constructor

g - Variable in class UltrasoundDetector

getMagnitudeSquared() - Method in class Goertzel

Optimized Goertzel.

getN() - Method in class UltrasoundDetector

Provide means to access the value of N that is used by the Goertzel algorithm to detect the presence of a specified frequency.

getNextChar(FileReader) - Static method in class ServerBeacon

Simple method for reading the next character from a file encapsulates the catching of an IOException.

getRealImag(double[]) - Method in class Goertzel

Basic Goertzel.

getStdIn() - Static method in class ServerBeacon

Simple method for reading the next character from the command line.

gless - Variable in class UltrasoundDetector

gmore - Variable in class UltrasoundDetector

H

HISTORY_SIZE - Static variable in interface Constants

I

init() - Method in class UltrasoundDetector

Method to initialize the Goertzel algorithm.

initGoertzel() - Method in class Goertzel

Call this once, to precompute the constants.

L

LocationTracker - interface LocationTracker.

This interface provides the means for an implementing class to be notified of room changes that occur in the MobileClient class.

latestUpdate - Variable in class MobileClient

littleEndConcat() - Method in class UltrasoundAnalyzer

Helper method for concatenating all the values in a byte array into 16-bit double values using the little endian format.

M

MAXMSGSIZE - Static variable in interface Constants

MAXTIME - Variable in class Broadcaster

MAX_DETECT_TIME - Static variable in interface Constants

MINTIME - Variable in class Broadcaster

MobileClient - class MobileClient.

This class provides location awareness to the granularity of a room inside a building based on the reception of 802.11 broadcasts and the corresponding detection of ultrasound.

MobileClient(LocationTracker, boolean) - Constructor for class MobileClient

This is the only constructor for this class.

main(String[]) - Static method in class Goertzel

The main function used for testing.

main(String[]) - Static method in class ServerBeacon

Can be given two parameters which are the MIN and MAX times to wait between transmissions.

main(String[]) - Static method in class TestApp

Create a new TestApp object, which in turn creates a new MobileClient object.

main(String[]) - Static method in class TestContinuous

main(String[]) - Static method in class TestDatagram

messageHistory - Variable in class MobileClient

msgHistInd - Variable in class MobileClient

N

N - Static variable in interface Constants

NUMTHREADS - Static variable in interface Constants

negCount - Variable in class UltrasoundListener

notifyApp - Variable in class MobileClient

P

PORTNUM - Static variable in class Broadcaster

PORTNUM - Static variable in interface Constants

posCount - Variable in class UltrasoundListener

processSample(double) - Method in class Goertzel

Call this routine for every sample.

R

ROOM_MSG_BUF - Static variable in interface Constants

Room - class Room.

This class encapsulates the concept of a room message.

Room(String, long) - Constructor for class Room

Basic constructor can be used to create a new Room object describing the room message that was received and the time at which it was received.

resetGoertzel() - Method in class Goertzel

Call this method after every block of N samples has been processed.

roomChanged(HashMap) - Method in interface LocationTracker

This method is called by the MobileClient class when a change in room location occurs.

roomChanged(HashMap) - Method in class TestApp

This method is called by the Mobile Client class with a HashMap containing room strings and their associated relative confidence magnitudes.

roomMsg - Variable in class Room

run() - Method in class Broadcaster

This is where all the thread activity occurs in a continous loop.

run() - Method in class DatagramListener

This is the method in which datagram packets are continuously received and sent out for notification to the DatagramUpdateListener.

run() - Method in class UltrasoundAnalyzer

The UltrasoundAnalyzer thread first concatenates the array of bytes into 16-bit little endian samples, then uses the UltrasoundDetector to determine whether or not the samples contain ultrasound and notifies the UltrasoundListener accordingly.

run() - Method in class UltrasoundListener

This is the main processing method of this class, where sound is recorded and the samples obtained are analyzed.

S

SAMPLE_SIZE - Static variable in interface Constants

SAMPLING_RATE - Static variable in interface Constants

SEQUENCE - Static variable in interface Constants

SIGN - Static variable in interface Constants

ServerBeacon - class ServerBeacon.

ServerBeacon is a stand-alone class that acts as a broadcasting station for use in an ultrasound/802.11 indoor positioning system.

ServerBeacon() - Constructor for class ServerBeacon

socket - Variable in class DatagramListener

T

TARGET_FREQUENCY - Static variable in interface Constants

TestApp - class TestApp.

This class exemplifies what an application would look like if it used the MobileClient class to provide location awareness to a device.

TestApp(boolean) - Constructor for class TestApp

TestContinuous - class TestContinuous.

TestContinuous() - Constructor for class TestContinuous

TestDatagram - class TestDatagram.

TestDatagram() - Constructor for class TestDatagram

targetDataLine - Variable in class UltrasoundListener

terminate() - Method in class Broadcaster

This method is used by external classes running this Broadcaster thread.

timeReceived - Variable in class Room

timesDetected - Variable in class UltrasoundListener

U

UltrasoundAnalyzer - class UltrasoundAnalyzer.

The UltrasoundAnalyzer thread class takes an array of bytes, concatenates them into 16-bit values in little endian format, then creates an UltrasoundDetector object to decide whether or not the samples contain the desired frequency.

UltrasoundAnalyzer(UltrasoundListener, boolean, int) - Constructor for class UltrasoundAnalyzer

The main UltrasoundAnalyzer constructor takes a reference to an UltrasoundListener and a byte array containing the samples to be analyzed.

UltrasoundDetector - class UltrasoundDetector.

The UltrasoundDetector class can be used to help analyze an ultrasound signal.

UltrasoundDetector() - Constructor for class UltrasoundDetector

Default Constructor

UltrasoundDetector(float, float, int, boolean) - Constructor for class UltrasoundDetector

Constructor.

UltrasoundListener - class UltrasoundListener.

This class is a thread that continuously listens for ultrasound through the microphone and notifies the UltrasoundUpdateListener it was instantiated with whenever ultrasound is detected.

UltrasoundListener(UltrasoundUpdateListener) - Constructor for class UltrasoundListener

This default constructor assumes a sampling rate of 44100 Hz, a target frequency of 21000 Hz, an N value of 420, and debugging information turned off.

UltrasoundListener(UltrasoundUpdateListener, boolean) - Constructor for class UltrasoundListener

UltrasoundUpdateListener - interface UltrasoundUpdateListener.

This interface provides a means by which the UltrasoundListener class can notify external applications of ultrasound detections.

ultrasoundDetected(long) - Method in class MobileClient

Callback method for the UltrasoundListener thread that receives notifications of newly received ultrasound detections.

ultrasoundDetected(long) - Method in class TestContinuous

ultrasoundDetected(long) - Method in interface UltrasoundUpdateListener

This method is called by the UltrasoundListener class when ultrasound is detected.

update(LineEvent) - Method in class Broadcaster

This method is called by the 'audioClip' data line whenever an event occurs.

updateListener - Variable in class DatagramListener

updateListener - Variable in class UltrasoundListener

usDebounced - Variable in class UltrasoundListener

usd - Variable in class UltrasoundAnalyzer

usl - Variable in class TestContinuous

usl - Variable in class UltrasoundAnalyzer

W

WAVEFILE - Static variable in class Broadcaster

WEIGHT - Static variable in interface Constants

A B C D E G H I L M N P R S T U W