musicplayer.java

又是一款j2me 游戏

// Decompiled by DJ v3.7.7.81 Copyright 2004 Atanas Neshkov  Date: 2005-4-9 12:51:47
// Home Page : http://members.fortunecity.com/neshkov/dj.html  - Check often for new version!
// Decompiler options: packimports(3)
// Source File Name:   MusicPlayer.java

package girl60;


// Referenced classes of package AfterDark:
//            InstrumentChannel

class MusicPlayer
{

    public MusicPlayer(int instrumentNum)
    {
        isPaused = false;
        try
        {
            channel = new InstrumentChannel[instrumentNum];
        }
        catch(Exception e)
        {
            for(int i = 0; i < channel.length; i++)
                channel[i] = null;

        }
    }

    public void Pause()
    {
        synchronized(this)
        {
            isPaused = true;
        }
        for(int i = 0; i < channel.length; i++)
            if(channel[i] != null)
                channel[i].Pause();

    }

    public void Resume()
    {
        synchronized(this)
        {
            isPaused = false;
        }
        for(int i = 0; i < channel.length; i++)
            if(channel[i] != null)
                channel[i].Resume();

    }

    public void SetTune(int chNum, String string, int soundFormat)
    {
        try
        {
            channel[chNum] = new InstrumentChannel(ConvertHexToBinary(string), soundFormat);
        }
        catch(Exception e) { }
    }

    public int GetInstrumentNumber(int chNum, String string)
    {
        return channel.length;
    }

    public void SetVolume(int level)
    {
        for(int i = 0; i < channel.length; i++)
            channel[i].SetVolume(level);

    }

    public int GetVolume(int chNum)
    {
        return channel[chNum].GetVolume();
    }

    public void Play(int chId, int loop)
    {
        if(channel[chId] != null)
        {
            channel[chId].Stop();
            channel[chId].Play(loop);
        }
    }

    public void Stop(int chId)
    {
        if(channel[chId] != null)
            channel[chId].Stop();
    }

    private static byte[] ConvertHexToBinary(String hexData)
        throws Exception
    {
        if(hexData.length() % 2 != 0)
            throw new Exception("Must be an even number of hex digits");
        byte binaryData[] = new byte[hexData.length() / 2];
        for(int i = 0; i < binaryData.length; i++)
        {
            String byteStr = hexData.substring(i * 2, i * 2 + 2);
            if(byteStr.charAt(0) == '-')
                throw new Exception("Invalid hex digit: -");
            int value;
            try
            {
                value = Integer.parseInt(byteStr, 16);
            }
            catch(NumberFormatException e)
            {
                throw new Exception("Invalid hex digits: " + byteStr);
            }
            binaryData[i] = (byte)value;
        }

        return binaryData;
    }

    static final int FORMAT_TONE = 1;
    private volatile boolean isPaused;
    private InstrumentChannel channel[];

}