SimpleAudioEngine on IOS....too many sounds playing?

cocos2d-x C++
1

Hi all,

Just wondering if anyone else has experienced when too many sounds are playing, then others stop. For example, I have a scene where I have a sound playing for 10 seconds…if I play lots of sounds in between this 10 second window, the sounds stops. Seems to happen on all IOS devices. I am using Cocos2dx version 3.6 SDK

2

As far as I remember there’s a bug in SimpleAudioEngine on iOS which causes that. I had 3 looped-sounds playing all the time and sound random sounds playing time-to-time. After a while looped-sounds stopped. It’s because function checking for free channel isn’t working as intended.

In CocosDension::playSound try adding this loop between

int sourceIndex = [self _getSourceIndexForSourceGroup:sourceGroupId];//This method ensures sourceIndex is valid

and

if (sourceIndex != CD_NO_SOURCE) {

Here’s a fix:

for(int i = 0; i < sourceTotal_; i++){
        ALint state;
        ALuint source = _sources[i].sourceId;
        alGetSourcei(source, AL_SOURCE_STATE, &state);
        if (state != AL_PLAYING && state != AL_PAUSED) {
            sourceIndex = i;
            break;
        }
    }

So, you have 32 channels which you can use. Any looped sound should never stop by playing another sound.

1 Like
3

Wow. That did the trick! You are a legend! That saved me ripping it out and trying AudioEngine…cheers mate!

4

Guess how many time it got me to figure it out. Anyway I also tried AudioEngine, but I got some serious issues with it - random crashes etc.

5

I can imagine it being a time pit, especially looking at the IOS code and changing it. Well, you saved me a great pain, and I thank you for that. Have a great week. You deserve it :smile: