Where my could queue in the flow becomes of in my audio recording application

My application runs the audio analysis in real time. Some just devices will not be able to handle the amount of treatment needed, but I expect devices like the 9780 to be able to manage it. Currently, this application works without error on OS7 phones.

Here's my program structure:

initialize:

-l' screen displayed items

-audio listener thread started. The drive uses a read/write overrided ByteArrayOutputStream that communicates with the thread of analysis.

-analysis is generated when the outputstream reaches a certain size

On slower devices, I get the error app 523 (9000) and 603 (9780), when there is an overflow of queue event. The user interface is slow on these devices.

To isolate the problem, I put comment calls to perform the analysis of the audio, which subsequently stops all calls to make any changes to the user interface (in other words, all arrested on the event thread calls in my code). In this State, all that works is the player that stores data in memory via the ByteArrayOutputStream and the event queue overflow occurs.

I'm puzzled why the wire audio sampler could have an impact on the thread of events. I was wondering if the ByteArrayOutputStream writing calls were run on the thread of the event, but a new thread for the writing of a spawning code does nothing to solve the problem.

Any ideas?

Thank you

Scott

Hi superdirt,

Try to replace your writing (in OutputBuffer) function with the following:

public void write (byte[] b, int off, int len) {  synchronized (this) {       boolean callread=(buffer.length < 2048*2*2*2 && (buffer.length+len) >= 2048*2*2*2 || buffer.length>20000);       super.write(b, off, len);       //if (callread) agt.update();  }}

If it works fine.

If this is not the case, try using a Profiler or substituting the rest of the ByteArrayOutputStream functions like this:

f() {}

System.out.println ("function f has started!");

Super.f ();

System.out.println ("function f finished!");

}

These options will give more information about the features enabled and the cause of the overflow.

E.

Tags: BlackBerry Developers

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