triana.types.audio.gsm.encoder

Class Encoder

java.lang.Object

java.lang.Thread

triana.types.audio.gsm.encoder.Encoder

All Implemented Interfaces:

java.lang.Runnable

public class Encoder
extends java.lang.Thread

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
Encoder() Encoder class constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	encode(java.io.InputStream input, java.lang.String output_file) Encode the specified InputStream.
void	encode(java.lang.String input_file, java.lang.String output_file) Encode the specified file.
byte[]	getFrame() return frame containing GSM compression
byte[]	process(short[] data) Takes an array of shorts and returns a byte array containing the GSM encoded data.
void	setInputData(int[] data) Sets the input signal to the array specified.
static void	stripAUHeader(java.io.InputStream in) Remove the header info from the stream and verifies the file type.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, run, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

Encoder

public Encoder()

Encoder class constructor.

Method Detail

setInputData

public void setInputData(int[] data)

Sets the input signal to the array specified. Must be an integer array containing 160 samples for conversion into a GSM frame.

getFrame

public byte[] getFrame()

return frame containing GSM compression

process

public final byte[] process(short[] data)

Takes an array of shorts and returns a byte array containing the GSM encoded data. The short array MUST be an integer multiple of 160 samples for this encoding to work!!

stripAUHeader

public static void stripAUHeader(java.io.InputStream in)
                          throws java.lang.Exception

Remove the header info from the stream and verifies the file type. As defined by the NeXT/Sun audio file format U-law (.au). For more info see the README file.

Note: Most of this info is not needed to reproduce the sound file after encoding. All that is needed is the magic number and the sampling rate to reproduce the sound file during decoding.

Parameters:

in - Strip the header from a Sun/Next formated sound stream.

Throws:

java.lang.Exception

encode

public void encode(java.lang.String input_file,
          java.lang.String output_file)
            throws java.lang.Exception

Encode the specified file.
This method calls the stripAUHeader method for you.
stripAUHeader will verify file type.

Parameters:

input_file - The name of the file to encode.

output_file - The name of the GSM encoded file.

Throws:

java.lang.Exception

encode

public void encode(java.io.InputStream input,
          java.lang.String output_file)
            throws java.io.IOException

Encode the specified InputStream.

Parameters:

input - The stream to encode.

output_file - The name of the GSM encoded file.

Throws:

java.io.IOException