[Pharo-users] NativeBoost Questions while wrapping FMOD

[Sean P. DeNigris]

I'm wrapping the FMOD cross-platform audio library. The code is MIT and lives
at http://smalltalkhub.com/#!/~SeanDeNigris/FMOD

========
Problem #1:
========

I'm calling into the FMOD library with:
primStoreIsPlaying: channelHandle in: isPlayingHandle 
        <primitive: #primitiveNativeCall module: #NativeBoostPlugin>
        
        "FMOD_RESULT FMOD_Channel_IsPlaying(
                FMOD_CHANNEL *channel,
                bool *isplaying);"
        
        ^ self nbCall: #(FMOD_RESULT FMOD_Channel_IsPlaying(NBExternalAddress
channel, NBExternalAddress isPlayingHandle)).

I call the above with:
    isPlaying
        | isPlaying |
        isPlaying := NBExternalAddress new.
        self primStoreIsPlaying: channel in: isPlaying.
        ^ isPlaying value > 0.

isPlaying is always 0. The method works directly from C with:
int isPlaying = 1;
    while (isPlaying) {
        FMOD_Channel_IsPlaying(channel, &isPlaying);
    }

I also tried changing the callout signature to "... bool* isPlayingHandle)"
and passing "isPlaying := true." instead of using the NBExternalAddress
stuff.

I have a few more questions, but this is the most pressing as it's holding
up any further development.

Thanks!



-----
Cheers,
Sean
--
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