播放声音序列与SimpleAudioEngine

问题描述

我要建一个iOS应用使用cocos2d的2，和我使用SimpleAudioEngine起到一些效果。

有没有办法测序多个声音在previous声后播放完成后？

例如在我的code：

  [SimpleAudioEngine sharedEngine] playEffect：@yay.wav];
[SimpleAudioEngine sharedEngine] playEffect：@youDidIt.wav];
 

在此code运行时， yay.wav 和 youDidIt.wav 在完全相同的打时间，超过对方。

我想 yay.wav 玩，一旦完成， youDidIt.wav 玩了。

如果不SimpleAudioEngine，有没有与AudioToolbox的方式，还是其他什么东西？

感谢您！

== 更新 ==

我想我会使用AVFoundation用这种方法去：

  AVPlayerItem * Sound1例子= [[AVPlayerItem页头] initWithURL：[NSURL fileURLWithPath：[一个NSBundle mainBundle] pathForResource：@耶ofType：@WAV]]];
AVPlayerItem * SOUND2 = [[AVPlayerItem页头] initWithURL：[NSURL fileURLWithPath：[一个NSBundle mainBundle] pathForResource：@YouDidItofType：@WAV]]];
AVQueuePlayer *玩家= [[AVQueuePlayer页头] initWithItems：[NSArray的arrayWithObjects：Sound1例子，SOUND2，无]];
[播放器播放];
 

解决方案

这很简单，用的Cocos2D 2.1测试：

1. 在创建一个SimpleAudioEngine.h物业durationInSeconds：

     @属性（只读）浮durationInSeconds;
    




2. 合成它们：

     @synthesize durationInSeconds;
    




3. 修改playEffect是这样的：

      - （ALuint）playEffect：（* NSString的）文件路径间距：（浮点32）沥青锅：（浮点32）锅增益：（浮点32）{增益
       INT soundId = [bufferManager bufferForFile：文件路径创建：YES];
       如果（soundId！= kCDNoBuffer）{
           durationInSeconds = [soundEngine bufferDurationInSeconds：soundId];
           返回[soundEngine playSound：soundId sourceGroupId：0间距：间距锅：锅增益：增益循环：假];
       }其他{
           返回CD_MUTE;
       }
   }
    




4. 正如你所看到的，我从bufferManager的结果直接插入从soundEngine bufferDurationInSeconds durationInSeconds值。




5. 现在，只要求值[SimpleAudioEngine sharedEngine] .durationInSeconds和你有浮动持续此声音秒。




6. 把一个定时器这个秒在此之后，发挥你的声音的下一个迭代或将标志OFF或东西。

I'm building an iOS app with cocos2d 2, and I'm using SimpleAudioEngine to play some effects.

Is there a way to sequence multiple sounds to be played after the previous sound is complete?

For example in my code:

[[SimpleAudioEngine sharedEngine] playEffect:@"yay.wav"];
[[SimpleAudioEngine sharedEngine] playEffect:@"youDidIt.wav"];

When this code is run, yay.wav and youDidIt.wav play at the exact same time, over each other.

I want yay.wav to play and once complete, youDidIt.wav to play.

If not with SimpleAudioEngine, is there a way with AudioToolbox, or something else?

Thank you!

== UPDATE ==

I think I'm going to go with this method using AVFoundation:

AVPlayerItem *sound1 = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"yay" ofType:@"wav"]]];
AVPlayerItem *sound2 = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"YouDidIt" ofType:@"wav"]]];    
AVQueuePlayer *player = [[AVQueuePlayer alloc] initWithItems: [NSArray arrayWithObjects:sound1, sound2,  nil]];
[player play];

解决方案

It's simple, tested with Cocos2D 2.1:

1. Creates a property durationInSeconds on SimpleAudioEngine.h :

   @property (readonly) float durationInSeconds;
   

2. Synthesize them :

   @synthesize durationInSeconds;
   

3. Modify playEffect like this :

   -(ALuint) playEffect:(NSString*) filePath pitch:(Float32) pitch pan:(Float32) pan gain:(Float32) gain {
       int soundId = [bufferManager bufferForFile:filePath create:YES];
       if (soundId != kCDNoBuffer) {
           durationInSeconds = [soundEngine bufferDurationInSeconds:soundId];
           return [soundEngine playSound:soundId sourceGroupId:0 pitch:pitch pan:pan gain:gain loop:false];
       } else {
           return CD_MUTE;
       }
   }
   

4. As you can see, I inserted durationInSeconds value directly from soundEngine bufferDurationInSeconds from the result of bufferManager.

5. Now, only ask for the value [SimpleAudioEngine sharedEngine].durationInSeconds and you've got the float duration in seconds of this sound.

6. Put a timer this seconds and after this, play the next iteration of your sound or put the flag OFF or something.

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