Multiple sounds in c# using .NET Compact Framework

[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

[Guest]

Multiple sounds in c# using .NET Compact Framework

[color=blue]
>-----Original Message-----
>I have been trying for 3 weeks now to make multiple[/color]
sounds[color=blue]
>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.[/color]
I[color=blue]
>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[/color]
into[color=blue]
>c# and failed. I tried using the OpenNetCF wrapper and
>failed.
>
>The wave functions want nice pointers to blocks of[/color]
memoery[color=blue]
>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[/color]
function[color=blue]
>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[/color]
to[color=blue]
>convert a delegate to an IntPtr. Anything in fact that
>helps me overcome the barrier between managed code and[/color]
the[color=blue]
>rest of the facilties on my little pocket pc!
>
>Regards
>
>Rob
>
>.
>[/color]

[Nicholas Paldino [.NET/C# MVP]]

Re: Multiple sounds in c# using .NET Compact Framework

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.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

<anonymous@disc ussions.microso ft.com> wrote in message
news:487c01c3a1 72$02372d20$7d0 2280a@phx.gbl.. .[color=blue]
>[color=green]
> >-----Original Message-----
> >I have been trying for 3 weeks now to make multiple[/color]
> sounds[color=green]
> >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.[/color]
> I[color=green]
> >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[/color]
> into[color=green]
> >c# and failed. I tried using the OpenNetCF wrapper and
> >failed.
> >
> >The wave functions want nice pointers to blocks of[/color]
> memoery[color=green]
> >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[/color]
> function[color=green]
> >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[/color]
> to[color=green]
> >convert a delegate to an IntPtr. Anything in fact that
> >helps me overcome the barrier between managed code and[/color]
> the[color=green]
> >rest of the facilties on my little pocket pc!
> >
> >Regards
> >
> >Rob
> >
> >.
> >[/color][/color]