Multiple sounds in c# using .NET Compact Framework

  • Thread starter Thread starter Rob Collins
  • Start date Start date
R

Rob Collins

I have been trying for 3 weeks now to make multiple sounds
at once using C# targetted to a pocket PC using visual
studio 2003. I have been blocked at every turn - mostly
because of the mismatch between the managed code model of
c# and the underlying CE API and its c++ flavour.

All I want to do is play more than one wav file at once. I
can't think why playSound was not designed to allow this.
However, using the various 'wave' functions is also very
difficult. I tried to translate the code at
http://www.pocketpcdn.com/articles/multiplewaves.html into
c# and failed. I tried using the OpenNetCF wrapper and
failed.

The wave functions want nice pointers to blocks of memoery
containing the data and c# just hates doing this! For
example, the OpenNetCF wrapper exepects an IntPtr
parameter as a pointer to a function. C# wants it to be a
delegate - but I can find no method of converting one to
the other! I know that secretly the delegate is a function
pointer - but can I pass it as a parameter to the wave
functions? No way? So I can't make it do a callback.

Please, somebody smart show me that it is really easy to
make multiple sounds at once using c# .NET . Show me that
I really can call low level wave functions. Tell me how to
convert a delegate to an IntPtr. Anything in fact that
helps me overcome the barrier between managed code and the
rest of the facilties on my little pocket pc!

Regards

Rob
 
-----Original Message-----
I have been trying for 3 weeks now to make multiple sounds
at once using C# targetted to a pocket PC using visual
studio 2003. I have been blocked at every turn - mostly
because of the mismatch between the managed code model of
c# and the underlying CE API and its c++ flavour.

All I want to do is play more than one wav file at once. I
can't think why playSound was not designed to allow this.
However, using the various 'wave' functions is also very
difficult. I tried to translate the code at
http://www.pocketpcdn.com/articles/multiplewaves.html into
c# and failed. I tried using the OpenNetCF wrapper and
failed.

The wave functions want nice pointers to blocks of memoery
containing the data and c# just hates doing this! For
example, the OpenNetCF wrapper exepects an IntPtr
parameter as a pointer to a function. C# wants it to be a
delegate - but I can find no method of converting one to
the other! I know that secretly the delegate is a function
pointer - but can I pass it as a parameter to the wave
functions? No way? So I can't make it do a callback.

Please, somebody smart show me that it is really easy to
make multiple sounds at once using c# .NET . Show me that
I really can call low level wave functions. Tell me how to
convert a delegate to an IntPtr. Anything in fact that
helps me overcome the barrier between managed code and the
rest of the facilties on my little pocket pc!

Regards

Rob

.
Click to expand...
 
I think that you want to look into using the managed wrappers for
DirectX 9. DirectX should allow you to play more than one sound at once,
easily.

Hope this helps.
 
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