Method RealtimeProcessStart

libraries/lib-vst/VSTInstance.cpp:265–334

}

bool VSTInstance::RealtimeProcessStart(MessagePackage& package)
{
   const bool applyChunkInMainThread = ChunkMustBeAppliedInMainThread();

   if (applyChunkInMainThread)
      mDeferredChunkMutex.lock();

   if (!package.pMessage)
      return true;

   auto& message = static_cast<VSTMessage&>(*package.pMessage);

   auto &chunk = message.mChunk;

   if (!chunk.empty())
   {
      if (applyChunkInMainThread)
      {
         // Apply the chunk later
         //
         mChunkToSetAtIdleTime = chunk;
      }
      else
      {
         // Apply the chunk now
         ApplyChunk(chunk);
      }

      // Don't apply the chunk again until another message supplies a chunk
      chunk.resize(0);

      // Don't return yet.  Maybe some slider movements also accumulated after
      // the change of the chunk.

      const bool IsAudioThread = (mMainThreadId != std::this_thread::get_id());
      if (IsAudioThread)
      {
         // At the moment, the only reason why this method would be called in the audio thread,
         // is because a preset was loaded while playing

         mPresetLoadedWhilePlaying.store(true);
      }

   }


   assert(message.mParamsVec.size() == mAEffect->numParams);

   for (size_t paramID=0; paramID < mAEffect->numParams; paramID++)
   {
      if (message.mParamsVec[paramID])
      {
         float val = (float)(*message.mParamsVec[paramID]);

         // set the change on the recruited "this" instance
         callSetParameter(paramID, val);

         // set the change on any existing slaves