Package javaforce.codec.gsm

Class GSMEncoder

java.lang.Object

java.lang.Thread

javaforce.codec.gsm.GSMEncoder

All Implemented Interfaces:

Runnable

public class GSMEncoder
extends Thread

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
GSMEncoder()	Encoder class constructor.

Method Summary

Modifier and Type	Method	Description
void	encode(short[] asBuffer, byte[] abFrame)	Encodes a block of data.
void	encode(InputStream input, String output_file)	Encode the specified InputStream.
void	encode(String input_file, String output_file)	Encode the specified file.
static void	stripAUHeader(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, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, run, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Details

GSMEncoder

public GSMEncoder()

Encoder class constructor.

Method Details

stripAUHeader

public static void stripAUHeader(InputStream in)
                          throws 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:

Exception

encode

public void encode(String input_file,
 String output_file)
            throws 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:

Exception

encode

public void encode(InputStream input,
 String output_file)
            throws IOException

Encode the specified InputStream.

Parameters:

input - The stream to encode.

output_file - The name of the GSM encoded file.

Throws:

IOException

encode

public void encode(short[] asBuffer,
 byte[] abFrame)

Encodes a block of data.

Parameters:

asBuffer - an 160-element array with the data to encode int PCM 16 bit format.

abFrame - the encoded GSM frame (33 bytes).