package com.j2medev.chapter7;

import java.io.*;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.media.control.*;
import javax.microedition.media.*;
        
public class AudioPlayer implements Runnable {
    
    private AudioMIDlet midlet = null;
    private Player recPlayer = null;
    private RecordControl record = null;
    //存儲錄音文件
    private ByteArrayOutputStream bos = new ByteArrayOutputStream();
    private Alert alert = new Alert("info");
    
    public AudioPlayer(AudioMIDlet _midlet) {
        this.midlet = _midlet;
        alert.setType(AlertType.WARNING);
    }
    
    private void createRecordPlayer(){
        try{
            //創建Player
            recPlayer = Manager.createPlayer("capture://audio");
            recPlayer.realize();
            recPlayer.prefetch();
        }catch(IOException ex){
            showAlert(ex.getMessage());
        }catch(MediaException ex){
            showAlert(ex.getMessage());
        }
    }
    
    private void showAlert(String message){
        alert.setString(message);
        alert.setTimeout(2000);
        midlet.setCurrent(alert);
    }
    
    public void startRecord(){
        new Thread(this).start();
    }
    
    public void stopRecord(){
        try {
            //停止錄音，把錄音數據寫入到內存
            record.stopRecord();
            record.commit();
            recPlayer.close();
            recPlayer = null;
        } catch (IOException ex) {
            showAlert(ex.getMessage());
        }
    }
    
    public void playRecord(){
        //播放存儲在內存中的錄音數據
        byte[] data = bos.toByteArray();
        try {
            bos.close();
        } catch (IOException ex) {
            showAlert(ex.getMessage());
        }
        InputStream is = new ByteArrayInputStream(data);
        try{
            //getContentType()可以得到媒體類型
            Player p = Manager.createPlayer(is,record.getContentType());
            p.start();
        }catch(IOException ex){
            showAlert(ex.getMessage());
        }catch(MediaException ex){
            showAlert(ex.getMessage());
        }
    }
    
    public void run() {
        if(recPlayer == null)
            createRecordPlayer();
        try {
            //創建RecordControl
            record = (RecordControl)recPlayer.getControl("RecordControl");
            record.setRecordSizeLimit(204800);
            //設置錄音記錄存儲的位置
            record.setRecordStream(bos);
            recPlayer.start();
            //開始錄音
            record.startRecord();
        } catch (MediaException ex) {
            showAlert(ex.getMessage());
        }
    }
    
    public void release(){
        //釋放資源
    }
    
}