Persistence

Developer VST 3 SDK
1

I followed the tutorial from the gain example, there are some errors like these lines :
void** in = getChannelBuffersPointer (processSetup, datainputs[0]);
void** out = getChannelBuffersPointer (processSetup, dataoutputs[0]);
those should be:
void** in = getChannelBuffersPointer (processSetup, data.inputs[0]);
void** out = getChannelBuffersPointer (processSetup, data.outputs[0]);
I tried to create the persistance of the parameters with the get/set implementation but I just couldn’t make them work.
I implement them, save the project and everytime I re-open the project they are in their default state.

2

Yeah, you’ right. There are these typos and the missing part is that the controller also needs to load the state and set its parameter accordingly:

tresult PLUGIN_API PlugController::setComponentState (IBStream* state)
{
	// Here you get the state of the component (Processor part)
	if (!state)
		return kResultFalse;

    IBStreamer streamer (state, kLittleEndian);
    float savedParam1 = 0.f;
    if (streamer.readFloat (savedParam1) == false)
        return kResultFalse;

	// sync with our parameter
	if (auto param = getParameter (GainParams::kParamGainId))
		param->setNormalized (savedParam1);

    return kResultOk;
}
3

Thanks a lot, I discover it by looking at the “hello world” example along with the bypass method. I didn´t post it because it was about midnight. I think I will make a video about this.