Method ProcessStart

libraries/lib-realtime-effects/RealtimeEffectState.cpp:498–537

}

bool RealtimeEffectState::ProcessStart(bool running)
{
   // Get state changes from the main thread
   // Note that it is only here that the answer of IsActive() may be changed,
   // and it is important that for each state the answer is unchanging in one
   // processing scope.
   if (auto pAccessState = TestAccessState())
      pAccessState->WorkerRead();

   // Detect transitions of activity state
   auto pInstance = mwInstance.lock();
   bool active = IsActive() && running;
   if (active != mLastActive) {
      if (pInstance) {
         bool success = active
            ? pInstance->RealtimeResume()
            : pInstance->RealtimeSuspend();
         if (!success)
            return false;
      }
      mLastActive = active;
   }

   bool result = false;
   if (pInstance) {
      // Consume messages even if not processing
      // (issue #3855: plain UI for VST 2 effects)

      // Assuming we are in a processing scope, use the worker settings
      EffectInstance::MessagePackage package{
         mWorkerSettings.settings, mMovedMessage.get()
      };
      result = pInstance->RealtimeProcessStart(package);
   }

   if (!pInstance || !active)
      return false;
   else
      return result;
}

#define stackAllocate(T, count) static_cast<T*>(alloca(count * sizeof(T)))