Dave,

HELIX_FEATURE_AUTOUPGRADE enables sections of code that
allow the media engine to communicate to the top-level client
that some components needed for playback are either: a) missing;
or b) need to be upgraded.

For instance, if a clip required a certain codec and it wasn't
present, then the renderer would populate IHXUpgradeCollection
and then return an error in IHXRenderer::OnHeader(). This informs
the media engine what component is missing.

However, from the section of code that you are at, it looks like
there is a component missing in your build. If you look at the
contents of IHXUpgradeCollection, it should give you a little
information as to what component is can't find.

What kind of clip are you trying to play?

Eric

=============================================
Eric Hyche (ehyche at real.com)
Technical Lead
RealNetworks, Inc.  

> -----Original Message-----
> From: helix-client-dev-bounces at helixcommunity.org 
> [mailto:helix-client-dev-bounces at helixcommunity.org] On 
> Behalf Of Dave Jappy
> Sent: Wednesday, January 03, 2007 8:56 AM
> To: helix-client-dev at helixcommunity.org
> Subject: [Helix-client-dev] HELIX_FEATURE_AUTOUPGRADE - What's it for?
> 
> Can anyone advise me on the following please?
> 
>  
> 
> What does the #define of HELIX_FEATURE_AUTOUPGRADE do? 
> 
> What problems might be caused by removing it?
> 
>  
> 
> I'm getting problems in HXPlayer::ProcessIdle trying to play 
> a stream with the following code  - I'm always hitting the 
> HXR_MISSING_COMPONENTS code below:-
> 
>  
> 
>     if(m_pUpgradeCollection && 
> m_pUpgradeCollection->GetCount() > 0 && !m_pEngine->AtInterruptTime())
> 
>     {
> 
>         // Request an upgrade
> 
>         IHXUpgradeHandler* pUpgradeHandler = NULL;
> 
>         if(m_pClient)
> 
>             m_pClient->QueryInterface(IID_IHXUpgradeHandler, 
> (void**)&pUpgradeHandler);
> 
>         if(!pUpgradeHandler)
> 
>         {
> 
>             // In case of clients with no IHXUpgradeHandler support
> 
>             // just remove all the upgrade collectopn components
> 
>             m_pUpgradeCollection->RemoveAll();
> 
>             theErr = HXR_MISSING_COMPONENTS;
> 
>  
> 
> Regards,
> 
>             Dave Jappy
> 
>             Frontier Silicon
> 
>