Studio handles leak


#1

Hi!

I have a problem with studio handles leak in 1.10.10 version. Seems that handles doesn’t release until there are any other instances of the same event exists.

For example I use Explosion event from samples sound project shipped with API. It’s length is about 2 second and I spawn it in loop with 1 second interval. In previous versions of API I have 2-3 active event instances and is about 100 handles, but in 1.10.10 both instances count and handles are continiously grow until ‘spawning loop’ is not being stopped.

Code used to spawn event:

FMOD::Studio::EventInstance* instance = nullptr;
GDescription->createInstance(&instance);

instance->start();
instance->release();

Code used for checking instances and handles count:

int instancesCount = 0;
GDescription->getInstanceCount(&instancesCount);

FMOD_STUDIO_BUFFER_USAGE bufferUsage;
GFmodStudioSystem->getBufferUsage(&bufferUsage);

std::cout
    << "Instances count: " << std::dec << instancesCount << "\n"
    << "Handles count: " << bufferUsage.studiohandle.currentusage
    << std::endl;

I create a sample project with 2 configurations to demonstrate the issue:

  • fmod-1.10.09 - works as expected
  • fmod-1.10.10 - behaviour described above

Sample project

After a bit research I found that problem is only with events contains at least one Single Instrument inside it. If event consist of Multi Instrument or Scatterer Instrument all works as expected.


#2

Hi Ilya

Thanks for reporting this. We’ve been able to reproduce the issue and can confirm it was introduced in 1.10.10.

I’ve added a ticket to our JIRA to fix this in our next release.

Cheers
Derek