手機游戲中的聲音處理詳解

本文是在同一個游戲中移植在不同機型時所做的對聲音的處理，考慮到性能的要求，對每種類型的手機做了一定的要求。

s40中的聲音處理：

1)import com.nokia.mid.sound.*;

2)Sound soundPlayer;
void initSound(){
soundPlayer = new Sound(b_main,1);
if(m_playSound == 1)
}

3)byte[] b_main = ;

4)static int m_playSound = 1;

5)在程序中對聲音的控制m_playSound = (byte)(1 - m_playSound);
if(m_playSound == 1) catch(Exception e){}
}
if(m_playSound == 0) catch(Exception e){}
}

使用ott文件在nokia 40或60中。

1)定義數據結構

public class EMSound
{
public int type;
public byte[] data;
public EMSound(byte[] data, int type)
{
this.type = type;
this.data = data;
}
}

2)import com.nokia.mid.ui.*;
import com.nokia.mid.sound.*;

3)

Sound soundPlayer;
SoundListener soundListener = new EMSoundListener();
EMSound currentSound = null;
boolean soundPlaying = false;
boolean soundEnable = true;
class EMSoundListener
implements SoundListener {
public void soundStateChanged(Sound sound, int event) {
switch (event) {
case Sound.SOUND_STOPPED:
soundPlaying = false;
break;
case Sound.SOUND_PLAYING:
soundPlaying = true;
}
}
}
public EMSound loadSound(String resfile, int resID) {
EMSound sound;
try {
InputStream is = getClass().getResourceAsStream(resfile + "/" + resID +
".ott");
int len = (int) is.skip(10000);
is.close();
is = getClass().getResourceAsStream(resfile + "/" + resID + ".ott");
byte[] barr = new byte[len];
is.read(barr);
is.close();
sound = new EMSound(barr, Sound.FORMAT_TONE);
}
catch (Exception ex) {
sound = null;
}
return sound;
}
public void playSound(EMSound sound, int count) {
if (!soundEnable)
try { //colico
if (soundPlaying)
if (soundPlayer == null) {
soundPlayer = new Sound(sound.data, sound.type);
soundPlayer.setSoundListener(soundListener);
currentSound = null;
}
if (sound != currentSound) {
soundPlayer.release();
soundPlayer.init(sound.data, sound.type);
currentSound = sound;
}
soundPlayer.play(count);
}
catch (Exception ex) {
soundPlaying = false;
}
}
Sound[] soundPlayers;
public void playSound( EMSound sound[], int loc)
{
if (!soundEnable) { return; }
try {
if (soundPlaying) stopSound();
if (soundPlayers == null) {
soundPlayers = new Sound[sound.length];
System.out.println("Sounds == null");
for (int i=0; i<sound.length ; i++ ){
soundPlayers[i] = new Sound( sound[i].data, sound[i].type );
soundPlayers[i].setSoundListener( soundListener );
soundPlayers[i].init(sound[i].data, sound[i].type);
}
}
long now = System.currentTimeMillis();
soundPlayers[loc].play(1);
System.out.println("playing Sounds");
System.out.println("playing Sounds time"+(System.currentTimeMillis()-now) );
} catch(Exception ex) {
soundPlaying = false;
}
}
public void stopSound() {
if (!soundEnable)
if (soundPlayer != null) {　//colico
soundPlayer.stop();
}
}
public boolean isSoundPlaying() {
return soundPlaying;
}
public boolean isSoundEnable() {
return soundEnable;
}
public void setSoundEnable(boolean e) {
if (!e)
soundEnable = e;
}

在V300中，

1)public class EMSound
{
public String type;
public byte[] data;
public EMSound(byte[] data, String type)
{
this.type = type;
this.data = data;
}
}

2)import javax.microedition.media.Player;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.Manager;
import javax.microedition.media.Control.*;

3)

//Sound soundPlayer;
PlayerListener soundListener = new EMSoundListener();
Player soundPlayer;
EMSound currentSound = null;
boolean soundPlaying = false;
boolean soundEnable = true;
class EMSoundListener
implements PlayerListener {
public void playerUpdate(Player player, String event, Object eventData)
{ //soundStateChanged(int event)
if (event == PlayerListener.STOPPED) {
soundPlaying = false;
}
if (event == PlayerListener.STARTED) {
soundPlaying = true;
}
}
}
public EMSound loadSound(String resfile, int resID) {
EMSound sound;
try {
InputStream is = getClass().getResourceAsStream(resfile + "/" + resID +
".mid");
int len = (int) is.skip(10000);
is.close();
is = getClass().getResourceAsStream(resfile + "/" + resID + ".mid");
byte[] barr = new byte[len];
is.read(barr);
is.close();
sound = new EMSound(barr, "audio/midi");
}
catch (Exception ex) {
sound = null;
}
return sound;
}
public void playSound(EMSound sound, int count) {
if (!soundEnable)
try {
if (soundPlaying)
if (soundPlayer == null) {
soundPlayer = Manager.createPlayer(new ByteArrayInputStream(sound.data),
sound.type);
soundPlayer.addPlayerListener(soundListener);
currentSound = null;
}
if (sound != currentSound) {
soundPlayer.close();
soundPlayer = Manager.createPlayer(new ByteArrayInputStream(sound.data),
sound.type);
currentSound = sound;
}
soundPlayer.start();
}
catch (Exception ex) {
soundPlaying = false;
System.out.println(ex.toString());
}
}
public void stopSound() {
if (!soundEnable)
if (soundPlayer != null) {
try
catch (Exception e)
}
}
public boolean isSoundPlaying() {
return soundPlaying;
}
public boolean isSoundEnable() {
return soundEnable;
}

3.讀取mid文件

1)

import javax.microedition.media.*;

2)

Player player;
void initSound() {
try {
player = Manager.createPlayer(getStream("/sound/b_main.mid"),
"audio/midi");
player.realize();
player.setLoopCount(100000);
}
catch (Exception e)
}

3)

//在程序中對聲音的控制
m_playSound = (byte) (1 - m_playSound);
if (m_playSound == 1) {
try
catch (Exception e) {}
}
if (m_playSound == 0) {
try
catch (Exception e) {}
}