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Asked: 2026-05-12T13:51:21+00:00

I have created a custom allocator/presenter that works fine for playback of normal media

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I have created a custom allocator/presenter that works fine for playback of normal media files. However, when I use the following code to try to playback a DVD, it fails with a stack overflow exception.

    vmr9_ap = new vmr9ap();

HMONITOR monitor = MonitorFromWindow(hwnd, NULL);

IGraphBuilder *graph;
IBaseFilter *filter;

IDvdGraphBuilder *builder;

CoCreateInstance(CLSID_DvdGraphBuilder, NULL, CLSCTX_INPROC_SERVER, IID_IDvdGraphBuilder, reinterpret_cast<void**>(&builder));

CoCreateInstance(::CLSID_VideoMixingRenderer9, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, reinterpret_cast<void**>(&filter));


builder->GetDvdInterface(IID_IVMRFilterConfig9, (void**)&vmr9_config);

vmr9_ap->Initialize(g_pd3dDevice, monitor, vmr9_config);

HRESULT hr = builder->RenderDvdVideoVolume(L"G:\\VIDEO_TS", AM_DVD_SWDEC_PREFER | AM_DVD_VMR9_ONLY, &status);

builder->GetFiltergraph(&graph);

IDvdControl2 *dvdControl;

builder->GetDvdInterface(::IID_IDvdControl2, (void**)&dvdControl);

graph->QueryInterface(::IID_IMediaControl, (void**)&control);

HRESULT h = control->Run();

The stack overflow happens immediately after the call to control->Run(). It’s driving me nuts, as I’m sure I’m just forgetting something really really simple.

Thanks.

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1 Answer

  1. Editorial Team

    Your graph should look something like this. Make sure there aren’t any buggy filters in your graph.

    Because you are using a custom allocator, I would look there for the issue and set some breakpoints there. You code you pasted might be incomplete as I do not see you configure the VMR9 with the custom allocator, nor do I see it being added to the graph. I avoid using the DVDGraphBuilder as I had too difficult of a time getting it RenderVolume correctly with my VMR9+Allocator. I would build the graph a little more manually.

    I have a custom allocator in my open source project, along w/ a DVD player. You can check that out for reference, though there is a lot of code noise in there due to me needing to hack a few things in there for WPF compatiblity. http://wpfmediakit.codeplex.com

    What you are seeing should NOT be a DRM issue.

    alt text http://img29.imageshack.us/img29/7798/capturelu.jpg

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