[vdr] Re: Fast forward stops in timeshift mode

[Oliver Endriss <o.endriss@gmx.de>]

On Monday 08 September 2003 22:59, Klaus Schmidinger wrote:
> Thanks for these detailed tests.
> With this in mind I looked over dvbplayer.c and recording.c and
> I think there actually is a chance that CatchUp() gets called from
> the player thread _and_ the foreground program, which might result
> in 'last' being changed unexpectedly.
> 
> During your tests, do you use the progress display, or any fast forward/rewind
> function? AFAICS 'last' should only be messed with when those are used.

Sounds promising. Progress display is on and I'm using fast forward
mode (multi-speed mode, speed '3').

> Could you please add a counter to CatchUp(), which you increment at the
> entry point and decrement when leaving the function, and make a debug
> printout should the counter ever become larger than 1? If you can cause
> such a situation, we'll need a mutex for CatchUp().

Ok, added the counter and it really happens:

  xcnt 2
  ERROR:  last 17032  newlast 17031
  ERROR:  last 17032  newlast 17031
  Sep  8 23:46:10 orion vdr[18190]: ERROR: can't read from index - file 26  read -1  delta -8  last 17032  newLast 17031  size 136256  offs 136264

Adding a mutex will probably solve this problem.


Oliver


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