[vdr] ERROR: can't set PID xxxx on device y

Klaus Schmidinger Klaus.Schmidinger at cadsoft.de
Sun Feb 17 16:59:36 CET 2008


On 02/17/08 16:41, Klaus Schmidinger wrote:
> On 02/16/08 17:46, Petri Helin wrote:
>> Klaus Schmidinger wrote:
>>> On 02/09/08 16:36, Klaus Schmidinger wrote:
>>>> On 01/06/08 23:57, Reinhard Nissl wrote:
>>>>> Hi,
>>>>>
>>>>> Petri Helin schrieb:
>>>>>
>>>>>> since VDR became subtitles aware some months ago, I have been getting 
>>>>>> this kind of entries in the log:
>>>>>>
>>>>>> Jan  6 23:02:48 vdr vdr: [4506] ERROR: can't set PID 2027 on device  9
>>>>>>
>>>>>> PID 2027 is for a finnish subtitles stream.
>>>>>>
>>>>>> I cannot see anything failing or such when this entry appears, but just 
>>>>>> thought to let Klaus know about it, in case it would make some sense to him.
>>>>> I came across this log message today, too. Looks like
>>>>> SetCurrentSubtitleTrack() calls AttachReceiver() on the
>>>>> PrimaryDevice() which is cXineDevice in my case.
>>>>>
>>>>>> (gdb) bt
>>>>>> #0  0x080bbabb in cDevice::AddPid (this=0xb44c49f8, Pid=131, PidType=ptOther) at device.c:612
>>>>>> #1  0x080bbc00 in cDevice::AttachReceiver (this=0xb44c49f8, Receiver=0xb44e2078) at device.c:1502
>>>>>> #2  0x080be272 in cDevice::SetCurrentSubtitleTrack (this=0xb44c49f8, Type=ttSubtitle, Manual=false) at device.c:1052
>>>>>> #3  0x080be3b4 in cDevice::EnsureSubtitleTrack (this=0xb44c49f8) at device.c:1104
>>>>>> #4  0x080be58d in cDevice::SetAvailableTrack (this=0xb44c49f8, Type=ttSubtitle, Index=0, Id=131, Language=0x82529c8 "deu", Description=0x0) at device.c:984
>>>>>> #5  0x080bf0cb in cDevice::SetChannel (this=0xb44c49f8, Channel=0x82526c8, LiveView=true) at device.c:845
>>>>>> #6  0x080bf1ae in cDevice::SwitchChannel (this=0xb44c49f8, Channel=0x82526c8, LiveView=true) at device.c:735
>>>>>> #7  0x080a59bd in cChannels::SwitchTo (this=0x81a9880, Number=2) at channels.c:1201
>>>>>> #8  0x08158988 in main (argc=14, argv=0xbf993d34) at vdr.c:762
>>>>> Looks like Transferring() isn't set at that time and therefore a
>>>>> cLiveSubtitle instance is created although none is needed in
>>>>> transfer mode (which is the only way how my setup works).
>>>>>
>>>>>> 1048      if (currentSubtitleTrack != ttNone && !Replaying() && !Transferring()) {
>>>>>> 1049         const tTrackId *TrackId = GetTrack(currentSubtitleTrack);
>>>>>> 1050         if (TrackId && TrackId->id) {
>>>>>> 1051            liveSubtitle = new cLiveSubtitle(TrackId->id);
>>>>>> 1052            AttachReceiver(liveSubtitle);
>>>>>> 1053            }
>>>>>> 1054         }
>>>> SetChannel() in live mode triggers a Transfer-Mode, but that is actually
>>>> only started after SetChannel() has ended. Therefore, as you correctly
>>>> pointed out, Transferring is not yet set in EnsureSubtitleTrack().
>>>>
>>>> Maybe the sequence
>>>>
>>>>         if (!NeedsTransferMode)
>>>>            EnsureAudioTrack(true);
>>>>         EnsureSubtitleTrack();
>>>>
>>>> should be changed to
>>>>
>>>>         if (!NeedsTransferMode) {
>>>>            EnsureAudioTrack(true);
>>>>            EnsureSubtitleTrack();
>>>>            }
>>>>
>>>>
>>>> Could you please test this?
>>>>
>>>> Klaus
>>> Still waiting for verification.
>>>
>> Sorry, had forgotten this... I made the change you suggested in 
>> device.c, but I am still seeing the error message.
> 
> I believe this should fix it:
> 
> 
> --- device.c    2008/02/16 13:52:11     1.153
> +++ device.c    2008/02/17 15:40:08
> @@ -1049,7 +1049,7 @@
>          const tTrackId *TrackId = GetTrack(currentSubtitleTrack);
>          if (TrackId && TrackId->id) {
>             liveSubtitle = new cLiveSubtitle(TrackId->id);
> -           AttachReceiver(liveSubtitle);
> +           ActualDevice()->AttachReceiver(liveSubtitle);
>             }
>          }
>       return true;

Forget that - VDR is in Transfer-Mode in your case, so setting any
additional PID and starting the cLiveSubtitle is just wrong.

The basic problem, as Reinhard pointed out, is that Transferring()
doesn't return the right value at this time, because the transfer
player hasn't been attached, yet.

This change determines the Transferring condition from the fact
that the actual device is different than the primary device, which
is already the case at this early stage:


--- device.c    2008/02/16 13:52:11     1.153
+++ device.c    2008/02/17 15:55:06
@@ -1159,7 +1159,7 @@

 bool cDevice::Transferring(void) const
 {
-  return dynamic_cast<cTransfer *>(player) != NULL;
+  return ActualDevice() != PrimaryDevice();
 }

 bool cDevice::AttachPlayer(cPlayer *Player)


I hope this doesn't have any other side effects...

Klaus



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