I am a newbie for the Read Audio. Now we want to port Real Audio to a ARM9 platform which can support local playback and internet radio. This means that we need ra, rm decoder and RTSP, RTP, RTCP protocols.

I already downloaded RealFormat SDK. There is a rm2wav sample, I think we can utilize it to realize the local rm playback. But I still have some questions. It is quite appreciated if anybody can answer these questions for me and let me have a good start.

1) rm2wav sample converts rm file to a wav file, how can I get the raw PCM data (without the wav header)? Because we will output the sound to headset directly after decode, only need to know the sample rate, channels, then pass PCM data to DAC, that's enough.

2) rm2wav can only support rm format, how to integrate the ra decoder to it? Is there any guide or sample code?

3) For the internet radio, I think I need to check out the corresponding protocols, such as RTSP, RTP, RTCP, from the Helix DNA Client. Is there any ready project for reference? I noticed that there are hundreds of CVS check out options, which one is most sutible for my case?

Thanks a lot in advance!

Best Regards,
Xiong Feng
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