[mythtv] XVideo XvMC VLD broken

[Terry Barnaby]

Daniel Kristjansson wrote:
> On Mon, 2005-04-25 at 21:41 +0100, Terry Barnaby wrote:
> 
>>My enclosed attachments show some part of the sequence before changing
>>the channel (working1) and the first bit after (bug1).
>>The Via XvMC system gets a XvMCLoadQMatrix(),XvMCBeginSurface()
>>sequence then a lot of XvMCFlushSurface(), XvMCSyncSurface() (Getting
>>rid of buffers ????) then a XvMCPutSlice2() that fails as it no
>>longer owns the decoder (No XvMCBeginSurface() after the last 
>>XvMCSyncSurface().
> 
> 
> See my last message. I think the new channel change implementation 
> may remove this problem, since we won't delete the context at all.
> But we will delete and create surfaces one at a time, so this may
> cause other problems.
> 
> -- Daniel
> 
> 
> 
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Hi Daniel,

I don't think there is an issue with closing and re-opening the
context in XvMC VLD. So I am note sure your channel change
system will affect the problem.

There appears to be a more fundemental problem in avcodec after
a channel change.
The XVMC_VLD_field_end() function is continuely called without
any XVMC_VLD_field_start() calls. It appears that avcodec is
trying to decode garbage ....

Terry