How to use ma_data_converter with device callback?

[m1maker]

Hello.
I'm trying to use ma_data_converter for device callback.
Everything is initialized, but pInputOut is always nullptr.

		void* pInputOut = nullptr;
		ma_uint64 frameCountOut;
		ma_uint64 frameCountToProcess = frameCount;
		ma_data_converter_process_pcm_frames__format_only(&g_Converter, pInput, &frameCountToProcess, pInputOut, &frameCountOut);
		ma_encoder_write_pcm_frames(encoder, pInputOut, frameCountOut, nullptr);

Where is my wrong?
Thanks.

[mackron]

It's failing because your pInputOut pointer is initialized to null. You need to pass in a valid output buffer.