Multiproto DVBFE_GET_INFO and (not) locked

linux-dvb Claudio Luck 1 participant 1 message Jun 10, 2008 Media (V4L/DVB)

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Claudio Luck

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2008-06-10 13:57 UTC #0 lore raw

Hi Manu, hi all

I'm referring to the jusst.de/hg/multiproto tree. Working with a KNC1 DVB-S2 card to enhance the VideoLAN dvb plugin.

Testing showed that DVBFE_GET_INFO returns different frontend infos (fec, mods) when the tuner is locked and when it is not (pasted below).

Is this the correct/expected behavior?

Quoted 1 line

From two separate runs, where the first leaves the tuner locked; first

run (femon says no lock at start):

Quoted 23 lines

[00000303] dvb access debug: Opening device /dev/dvb/adapter1/frontend0 [00000303] dvb access debug: ioctl DVBFE_GET_DELSYS [00000303] dvb access debug: ioctl DVBFE_GET_INFO
[00000303] dvb access debug: Frontend Info:
[00000303] dvb access debug:   api = DVB API 3.3
[00000303] dvb access debug:   name = STB0899 DVB-S
[00000303] dvb access debug:   frequency_min = 950000 (kHz)
[00000303] dvb access debug:   frequency_max = 2150000 (kHz)
[00000303] dvb access debug:   frequency_step = 0
[00000303] dvb access debug:   frequency_tolerance = 0
[00000303] dvb access debug:   symbol_rate_min = 1000000 (kHz)
[00000303] dvb access debug:   symbol_rate_max = 45000000 (kHz)
[00000303] dvb access debug:   symbol_rate_tolerance (ppm) = 0
[00000303] dvb access debug: Frontend Info capability list:
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO
[00000303] dvb access debug: delivery system DSS
[00000303] dvb access debug: modulations: QPSK
[00000303] dvb access debug: FEC: 1/2 2/3 3/4 5/6 6/7
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO
[00000303] dvb access debug: delivery system DVB-S
[00000303] dvb access debug: modulations: QPSK
[00000303] dvb access debug: FEC: 1/2 2/3 3/4 5/6 6/7
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO

Quoted 8 lines

[00000303] dvb access debug: delivery system DVB-S2
[00000303] dvb access debug: modulations: QPSK
[00000303] dvb access debug: FEC: 1/2 2/3 3/4 5/6 6/7
[00000303] dvb access debug: End of capability list [00000303] dvb access debug: selected: DVB-S DSS DVB-S2 [00000303] dvb access debug: dropped: DVB-T DVB-C DVB-H
...
then more ioctl called (all works fine, i.e. VLC can stream DVB-S2)

Second run (femon says has lock at start):

Quoted 29 lines

[00000303] dvb access debug: Opening device /dev/dvb/adapter1/frontend0 [00000303] dvb access debug: ioctl DVBFE_GET_DELSYS [00000303] dvb access debug: ioctl DVBFE_GET_INFO
[00000303] dvb access debug: Frontend Info:
[00000303] dvb access debug:   api = DVB API 3.3
[00000303] dvb access debug:   name = STB0899 DVB-S2
[00000303] dvb access debug:   frequency_min = 950000 (kHz)
[00000303] dvb access debug:   frequency_max = 2150000 (kHz)
[00000303] dvb access debug:   frequency_step = 0
[00000303] dvb access debug:   frequency_tolerance = 0
[00000303] dvb access debug:   symbol_rate_min = 1000000 (kHz)
[00000303] dvb access debug:   symbol_rate_max = 45000000 (kHz)
[00000303] dvb access debug:   symbol_rate_tolerance (ppm) = 0
[00000303] dvb access debug: Frontend Info capability list:
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO
[00000303] dvb access debug: delivery system DSS
[00000303] dvb access debug: modulations: QPSK 8PSK 16APSK 32APSK
[00000303] dvb access debug: FEC: 1/2 1/3 1/4 2/3 2/5 3/4 3/5 4/5 5/6 8/9 9/10
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO
[00000303] dvb access debug: delivery system DVB-S
[00000303] dvb access debug: modulations: QPSK 8PSK 16APSK 32APSK
[00000303] dvb access debug: FEC: 1/2 1/3 1/4 2/3 2/5 3/4 3/5 4/5 5/6 8/9 9/10
[00000303] dvb access debug: ioctl DVBFE_SET_DELSYS DVBFE_GET_INFO
[00000303] dvb access debug: delivery system DVB-S2
[00000303] dvb access debug: modulations: QPSK 8PSK 16APSK 32APSK
[00000303] dvb access debug: FEC: 1/2 1/3 1/4 2/3 2/5 3/4 3/5 4/5 5/6 8/9 9/10
[00000303] dvb access debug: End of capability list [00000303] dvb access debug: selected: DVB-S DSS DVB-S2 [00000303] dvb access debug: dropped: DVB-T DVB-C DVB-H

Signature · 7 lines

Best Regards
Claudio Luck

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