Venki_scott
April 24th, 2006, 08:04 AM
can any one help me out to solve my exception which arosed whenever i try to run the .net application(C# using ikvm dll,a java file runs well independently).. Basically the java program to record the sound/voice and to playback... here is the code
import java.io.*;
import javax.sound.sampled.*;
public class JavaToNet23 implements Runnable{
boolean stopCapture = false;
public ByteArrayOutputStream byteArrayOutputStream;
public AudioFormat audioFormat;
public TargetDataLine targetDataLine;
public AudioInputStream audioInputStream;
public SourceDataLine sourceDataLine;
public static boolean l_boolRecord=true;
byte tempBuffer[] = new byte[10000];
public static void main(String args[]){
new JavaToNet23();
}
public JavaToNet23(){//constructor
}//end constructor
//This method captures audio input from a
// microphone and saves it in a
// ByteArrayOutputStream object.
public void captureAudio(){
l_boolRecord=true;
try{
//Get and display a list of
// available mixers.
Mixer.Info[] mixerInfo =
AudioSystem.getMixerInfo();
System.out.println("Available mixers:");
for(int cnt = 0; cnt < mixerInfo.length;
cnt++){
System.out.println(mixerInfo[cnt].
getName());
}//end for loop
//Get everything set up for capture
audioFormat = getAudioFormat();
DataLine.Info dataLineInfo =
new DataLine.Info(
TargetDataLine.class,
audioFormat);
//Select one of the available
// mixers.
Mixer mixer = AudioSystem.
getMixer(mixerInfo[3]);
//Get a TargetDataLine on the selected
// mixer.
targetDataLine = (TargetDataLine)
mixer.getLine(dataLineInfo);
//Prepare the line for use.
targetDataLine.open(audioFormat);
targetDataLine.start();
Thread th=new Thread(this,"Start Thread");
th.start();
} catch (Exception e) {
System.out.println(e);
}//end catch
}//end captureAudio method
public void stopRecord(){
stopCapture=false;
}
//This method plays back the audio data that
// has been saved in the ByteArrayOutputStream
public void playAudio() {
l_boolRecord=false;
try{
//Get everything set up for playback.
//Get the previously-saved data into a byte
// array object.
System.out.println("HISHIHSIHISHISHI "+byteArrayOutputStream);
byte audioData[] = byteArrayOutputStream.
toByteArray();
//Get an input stream on the byte array
// containing the data
InputStream byteArrayInputStream =
new ByteArrayInputStream(audioData);
AudioFormat audioFormat = getAudioFormat();
audioInputStream = new AudioInputStream(
byteArrayInputStream,
audioFormat,
audioData.length/audioFormat.
getFrameSize());
DataLine.Info dataLineInfo =
new DataLine.Info(
SourceDataLine.class,
audioFormat);
sourceDataLine = (SourceDataLine)
AudioSystem.getLine(dataLineInfo);
sourceDataLine.open(audioFormat);
sourceDataLine.start();
//Create a thread to play back the data and
// start it running. It will run until
// all the data has been played back.
Thread th=new Thread(this,"Start Thread");
th.start();
} catch (Exception e) {
System.out.println(e);
}//end catch
}//end playAudio
//This method creates and returns an
// AudioFormat object for a given set of format
// parameters. If these parameters don't work
// well for you, try some of the other
// allowable parameter values, which are shown
// in comments following the declartions.
private AudioFormat getAudioFormat(){
float sampleRate = 8000.0F;
//8000,11025,16000,22050,44100
int sampleSizeInBits = 16;
//8,16
int channels = 1;
//1,2
boolean signed = true;
//true,false
boolean bigEndian = false;
//true,false
return new AudioFormat(
sampleRate,
sampleSizeInBits,
channels,
signed,
bigEndian);
}//end getAudioFormat
//=============================================//
/* (non-Javadoc)
* @see java.lang.Runnable#run()
*/
public void run() {
if(l_boolRecord){
byteArrayOutputStream =
new ByteArrayOutputStream();
stopCapture = false;
try{//Loop until stopCapture is set by
// another thread that services the Stop
// button.
while(!stopCapture){
//Read data from the internal buffer of
// the data line.
int cnt = targetDataLine.read(tempBuffer,
0,
tempBuffer.length);
if(cnt > 0){
//Save data in output stream object.
byteArrayOutputStream.write(tempBuffer,
0,
cnt);
}//end if
}//end while
byteArrayOutputStream.close();
}catch (Exception e) {
System.out.println(e);
}//end catch
}else{
try{
int cnt;
//Keep looping until the input read method
// returns -1 for empty stream.
while((cnt = audioInputStream.read(
tempBuffer, 0,
tempBuffer.length)) != -1){
if(cnt > 0){
//Write data to the internal buffer of
// the data line where it will be
// delivered to the speaker.
sourceDataLine.write(tempBuffer,0,cnt);
}//end if
}//end while
//Block and wait for internal buffer of the
// data line to empty.
sourceDataLine.drain();
sourceDataLine.close();
}catch (Exception e) {
System.out.println(e);
}//end catch
}
}
}
My C# code is
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace WindowsApplication10
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
public JavaToNet23 ki;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(128, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(128, 24);
this.button1.TabIndex = 0;
this.button1.Text = "Record";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(120, 160);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(144, 24);
this.button2.TabIndex = 1;
this.button2.Text = "Stop";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(136, 208);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(120, 24);
this.button3.TabIndex = 2;
this.button3.Text = "Play";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
ki.captureAudio();
Console.WriteLine("Hi Venki ..."+ki.byteArrayOutputStream.toString());
}
private void button2_Click(object sender, System.EventArgs e)
{
Console.WriteLine("Hi Venki Stop ..."+ki.byteArrayOutputStream.toString());
ki.stopRecord();
Console.WriteLine("Hi Venki Stop ..."+ki.byteArrayOutputStream.toString());
}
private void button3_Click(object sender, System.EventArgs e)
{
Console.WriteLine("Hi Venki Play ..."+ki.byteArrayOutputStream.toString());
ki.playAudio();
Console.WriteLine("Hi Venki PLay ..."+ki.byteArrayOutputStream.toString());
}
private void Form1_Load(object sender, System.EventArgs e)
{
ki=new JavaToNet23();
}
}
}
this the excpetion
"An unhandled exception of type 'System.NullReferenceException' occurred in WindowsApplication10.exe"
import java.io.*;
import javax.sound.sampled.*;
public class JavaToNet23 implements Runnable{
boolean stopCapture = false;
public ByteArrayOutputStream byteArrayOutputStream;
public AudioFormat audioFormat;
public TargetDataLine targetDataLine;
public AudioInputStream audioInputStream;
public SourceDataLine sourceDataLine;
public static boolean l_boolRecord=true;
byte tempBuffer[] = new byte[10000];
public static void main(String args[]){
new JavaToNet23();
}
public JavaToNet23(){//constructor
}//end constructor
//This method captures audio input from a
// microphone and saves it in a
// ByteArrayOutputStream object.
public void captureAudio(){
l_boolRecord=true;
try{
//Get and display a list of
// available mixers.
Mixer.Info[] mixerInfo =
AudioSystem.getMixerInfo();
System.out.println("Available mixers:");
for(int cnt = 0; cnt < mixerInfo.length;
cnt++){
System.out.println(mixerInfo[cnt].
getName());
}//end for loop
//Get everything set up for capture
audioFormat = getAudioFormat();
DataLine.Info dataLineInfo =
new DataLine.Info(
TargetDataLine.class,
audioFormat);
//Select one of the available
// mixers.
Mixer mixer = AudioSystem.
getMixer(mixerInfo[3]);
//Get a TargetDataLine on the selected
// mixer.
targetDataLine = (TargetDataLine)
mixer.getLine(dataLineInfo);
//Prepare the line for use.
targetDataLine.open(audioFormat);
targetDataLine.start();
Thread th=new Thread(this,"Start Thread");
th.start();
} catch (Exception e) {
System.out.println(e);
}//end catch
}//end captureAudio method
public void stopRecord(){
stopCapture=false;
}
//This method plays back the audio data that
// has been saved in the ByteArrayOutputStream
public void playAudio() {
l_boolRecord=false;
try{
//Get everything set up for playback.
//Get the previously-saved data into a byte
// array object.
System.out.println("HISHIHSIHISHISHI "+byteArrayOutputStream);
byte audioData[] = byteArrayOutputStream.
toByteArray();
//Get an input stream on the byte array
// containing the data
InputStream byteArrayInputStream =
new ByteArrayInputStream(audioData);
AudioFormat audioFormat = getAudioFormat();
audioInputStream = new AudioInputStream(
byteArrayInputStream,
audioFormat,
audioData.length/audioFormat.
getFrameSize());
DataLine.Info dataLineInfo =
new DataLine.Info(
SourceDataLine.class,
audioFormat);
sourceDataLine = (SourceDataLine)
AudioSystem.getLine(dataLineInfo);
sourceDataLine.open(audioFormat);
sourceDataLine.start();
//Create a thread to play back the data and
// start it running. It will run until
// all the data has been played back.
Thread th=new Thread(this,"Start Thread");
th.start();
} catch (Exception e) {
System.out.println(e);
}//end catch
}//end playAudio
//This method creates and returns an
// AudioFormat object for a given set of format
// parameters. If these parameters don't work
// well for you, try some of the other
// allowable parameter values, which are shown
// in comments following the declartions.
private AudioFormat getAudioFormat(){
float sampleRate = 8000.0F;
//8000,11025,16000,22050,44100
int sampleSizeInBits = 16;
//8,16
int channels = 1;
//1,2
boolean signed = true;
//true,false
boolean bigEndian = false;
//true,false
return new AudioFormat(
sampleRate,
sampleSizeInBits,
channels,
signed,
bigEndian);
}//end getAudioFormat
//=============================================//
/* (non-Javadoc)
* @see java.lang.Runnable#run()
*/
public void run() {
if(l_boolRecord){
byteArrayOutputStream =
new ByteArrayOutputStream();
stopCapture = false;
try{//Loop until stopCapture is set by
// another thread that services the Stop
// button.
while(!stopCapture){
//Read data from the internal buffer of
// the data line.
int cnt = targetDataLine.read(tempBuffer,
0,
tempBuffer.length);
if(cnt > 0){
//Save data in output stream object.
byteArrayOutputStream.write(tempBuffer,
0,
cnt);
}//end if
}//end while
byteArrayOutputStream.close();
}catch (Exception e) {
System.out.println(e);
}//end catch
}else{
try{
int cnt;
//Keep looping until the input read method
// returns -1 for empty stream.
while((cnt = audioInputStream.read(
tempBuffer, 0,
tempBuffer.length)) != -1){
if(cnt > 0){
//Write data to the internal buffer of
// the data line where it will be
// delivered to the speaker.
sourceDataLine.write(tempBuffer,0,cnt);
}//end if
}//end while
//Block and wait for internal buffer of the
// data line to empty.
sourceDataLine.drain();
sourceDataLine.close();
}catch (Exception e) {
System.out.println(e);
}//end catch
}
}
}
My C# code is
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace WindowsApplication10
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
public JavaToNet23 ki;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(128, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(128, 24);
this.button1.TabIndex = 0;
this.button1.Text = "Record";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(120, 160);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(144, 24);
this.button2.TabIndex = 1;
this.button2.Text = "Stop";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(136, 208);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(120, 24);
this.button3.TabIndex = 2;
this.button3.Text = "Play";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
ki.captureAudio();
Console.WriteLine("Hi Venki ..."+ki.byteArrayOutputStream.toString());
}
private void button2_Click(object sender, System.EventArgs e)
{
Console.WriteLine("Hi Venki Stop ..."+ki.byteArrayOutputStream.toString());
ki.stopRecord();
Console.WriteLine("Hi Venki Stop ..."+ki.byteArrayOutputStream.toString());
}
private void button3_Click(object sender, System.EventArgs e)
{
Console.WriteLine("Hi Venki Play ..."+ki.byteArrayOutputStream.toString());
ki.playAudio();
Console.WriteLine("Hi Venki PLay ..."+ki.byteArrayOutputStream.toString());
}
private void Form1_Load(object sender, System.EventArgs e)
{
ki=new JavaToNet23();
}
}
}
this the excpetion
"An unhandled exception of type 'System.NullReferenceException' occurred in WindowsApplication10.exe"