AppendBytes on mobile

Hi,
I'm working on a ShoutCast player in Adobe AIR. My code works very good on a Desktop machine with low CPU/ memory usage but uses a lot of CPU (18%) when run on a Android phone (HTC Desire). I discovered the bottleneck was the appendBytes api which uses almost 15% CPU. I currently can't post the code but this is how my player works:
- I connect to a ShoutCast server using Sockets (ShoutCasts servers do not always return valid HTTP responses so i can't use URLStream).
- I parse the headers and based on the content-type i use a different parser (mp3 or AAC)
- I prepare a audio only FLV header and push it into the NetStream.
- For AAC i will parse each frame and wrap it in a FLV tag. The first FLV tag will be a AudioSpecificConfig. The timestamp will be calculated based on the length of the frame.
- For MP3 the same process applies. However no AudioSpecificConfig will be made.
- When playing i will wait for the buffer to drop below 60% of the max buffer time (6 seconds) and start reading more flv tags untill the buffer is full.
These are the problems i discovered when debugging the player on my phone:
- It uses a lot of CPU when playing audio. CPU drops when i comment out the appendBytes line (to 2%, 3%).
- The audio skips when you leave the program and try to do something (like scrolling).
So my questions are:
- Am i using the appendBytes api the wrong way and if so what is the best way to use it?
- Is it possible to make the audio less choppy when leaving the program? Or does AIR not allow that?
Best regards,
Remco

Remco,
It is hard to tell without the program or source code. I would expect the cpu % go up in Android.
Is it possible for you to make a simple program that works and demostrate the problem
you describe and send the project to me? That would be the best way for us to take a look.
My email address is [email protected]
Thanks,
-ted

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