CODEWITHSUNDEEP
cocos2d-iphoneaudio
J C
J C

Reputation: 63

ObjectAL/OpenAL for iOS - stop/pause/mute sound at runtime?

Here is the ObjectAL/OpenAL iOS documentation:

http://kstenerud.github.io/ObjectAL-for-iPhone/documentation/index.html#use_objectal_sec

How in the world can you simply stop/pause/mute a particular sound (not all sounds) at runtime?

I've tried using OALSimpleAudio, OpenAL Objects and OALAudioTrack with no luck.

I'm using cocos2d v3.

Upvotes: 1

Views: 1363

Answers (1)

pmpod
pmpod

Reputation: 379

You can follow the examples provided in: ObjectAL demos, for instance the SingleSourceDemo.

On of them is for the ALSource that @LearnCocos2D suggested in his comment. I will try to explain it here. First, you should have the audio engine - let's say it is OALSimpleAudio. Moreover, let's assume you don't want to use it for playing effects - they will be managed by separate ALSources:

    ALSource* effectSource;
    ALBuffer* effectBuffer; //this is for the effect buffer

    //don't reserve source for OALSimpleAudio 
    [OALSimpleAudio sharedInstance].reservedSources = 0;

    //create the source for the effect.
    source = [ALSource source]; 

    //buffer the source file. 
    buffer = [[OpenALManager sharedInstance] bufferFromFile:@"audiofile.caf"];

Now you can use following methods to play/pause/pitch:

    [source play:buffer loop:YES]; //play sound from buffer and loop
    [source stop]; //stop 
    [source rewind]; //rewind sound to the beggining 
    [source fadeTo:0.0f duration:1.0f target:self selector:@selector(onFadeComplete:)]; //fade effect from source
    [source pitchTo:0.0f duration:1.0f target:self selector:@selector(onFadeComplete:)]; //pitch effect from source

etc. Hope this will be helpful.

Upvotes: 1

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