Programmaticly Configure output

[babgvant]

I've been trying to figure out how to configure AC3Filter using the interfaces without much success.  Is there any documentation on how to configure the output types and gain levels?

Thanks.

[thetriggerman]

i have the same problem. have you already figured-out on how to solve this problem.

all i want is to make the volume set to max.

spassibo!

[babgvant]

I never did figure this out.

[chasdev]

I don't think it is possible given that COMDecoder is protected.

Code:

class AC3Filter : public CTransformFilter, public IAC3Filter, public ISpecifyPropertyPages
{
protected:
  bool          tray;     // show tray icon
  AC3FilterTray tray_ctl; // tray icon control

  CPUMeter   cpu;       // CPU usage meter
  COMDecoder dec;       // decoder & processor

As you can see, COMDecoder is protected and is the COM class that inherits the IDecoder interface.

Code:

class COMDecoder : public Filter, public IDecoder, public IAudioProcessor

IDecoder is the interface that has these two functions:

Code:

// Use SPDIF if possible
  STDMETHODIMP get_use_spdif(bool *use_spdif);
  STDMETHODIMP set_use_spdif(bool  use_spdif);
{

... which I was hoping to set programmatically as well.   Attempting to use such an interface despite the protected access results in:

Code:

Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call.

This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.

The other interfaces that are public to IAC3Filter are programmatically useable.  

Anybody know why COMDecoder is protected?  Just curious what good reasons there might be.

Peace and best regards,
Charles

[chasdev]

thetriggerman,

I guess it is worth mentioning that since AC3Filter uses the registry for many of its saved states, you can probably set the volume to max by setting a registry value just prior to instantiating the AC3Filter.

Have a look at: HKEY_CURRENT_USER\Software\AC3Filter\preset\Default

This was the solution I used for setting use_spdif for my application.  BUT, if anybody knows a way to adjust the runtime filter object, please feel free to post here  :wink:

Cheers,
Charles

p.s. Thank you very much Alexander for a most worthy project.