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.
0x201 could be
(from evcode.h -> audevcod.h)
11 Nov '12 - 16:04
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.
24 Nov '12 - 10:49
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