why not AudioTransport::PushCaptureData in ADM undergo APM(audio processing module) ？

[Joshua Xiong]

Hi,

I notice that AudioTransport has two interface to process captured audio:

 * AudioTransport::RecordedDataIsAvailable

 * AudioTransport::PushCaptureData

RecordedDataIsAvailable is the currenty used one, implemented by VoEBaseImpl. It process the audio frame by APM, ACM Encoder, RTP...

PushCaptureData is not used yet. But I find that the implementation doesn't include the APM module. 

Is there any specific design purpose for the two different API ?

Thanks a lot in advance:)

Best Regards.