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Bascially, I get a crash in a DirectShow application after hundreds of start/stop sequences.

I developed a simple application aiming to reproduce the problem and I get some strange behaviour at some point.

I may include the application code in a further post if necessary, but it based on

- OpenStartClip : Creates all the VMR9 stuff, including RenderFile and Run.
- StopCloseClip : Stops the graph and releases all interfaces
- The GraphEvent Handler : When receiving EC_COMPLETE or EC_USERABORT, posts a private WM_RESTART message to the application

Hence, the test application is supposed to play a file continuously by starting it again when finished.

The clip is a 6" WMV clip.

This works whell for about 1200 playback sessions, but at some point, it does not work anymore : playback is never started again.
Moreover, the last try session shows I got an unforeseen message in the GraphEvent Handler which code is 0x201 and is not documented (unless it is the WM_LBUTTONDOWN message which is not supposed to be triggered by DirectShow in the Callback).
Note that this message is triggered during the OpenClip treatment, as in that case I do not get the usuall EC_PAUSED I got when the application runs fine when starting playback.

Notice that I can exit the application propely, but I cannot start any new playback again while launching the application : I need to reboot the computer to get it work again.

This test was done with XP but I suppose it it the same with Seven as my general application stops on both OS after a while.

So the first clues are for me to know
- if some leaks are known in the DirectShow implementation process
- why I encounter this 0x201 error after hundreds of start/stop

I may provide the test code if necessary, but will avoid it in this first post in order not to pollute.

Thanks in advance.
Posted 11-Nov-12 4:51am
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Solution 1

0x201 could be SNDDEV_ERROR_Open

(from evcode.h -> audevcod.h)
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Solution 2

Thanks for the answer.
As a matter of fact, I only got this error once.

Nevertheless, I always get a crash after a couple of hours of sequenced playback.
And the crash occurs with XP, and finally not with 7 which played a 2s file more than 20000 times.
Looks like a big leak somewhere, and I suspect it to be in one of the DirectShow graph filter, where I have no control.
Nelek 25-Nov-12 7:38am
Please don't post solutions to add information, to ask something or to comment another user.
- To add information to your message, you can use the widget "Improve question" / "Improve solution" at the bottom of your text.
- To ask/answer a user, you can use the widget "Have a question or comment?" (as I am doing right now with you) or the widget "reply" in another comment.
mOOmOOn_ 25-Nov-12 8:04am
OK. Sorry for that. I'll be aware next time.
Nelek 25-Nov-12 8:06am
No problem, thank you :)

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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