[linux-dvb] S2API - First release

Steven Toth stoth at linuxtv.org
Thu Sep 4 17:19:13 CEST 2008

Igor M. Liplianin wrote:
> В сообщении от 4 September 2008 07:54:33 Steven Toth написал(а):
>> Hello,
>> It's been a crazy few days, please forgive my short absence.
>> What have I been doing? Well, rather than spending time discussing a new
>> S2API on the mailing list, I wanted to actually produce a working series
>> of patches that kernel and application developers could begin to test.
>> Here's where all of the new S2API patches will now appear:
>> http://linuxtv.org/hg/~stoth/s2
>> In addition, here's is a userland application that demonstrates tuning
>> the current DVB-S/T/C and US ATSC modulations types using the new API.
>> (www.steventoth.net/linux/s2/tune-v0.0.1.tgz)
>> A tuning demo app? What? Obviously, tuning older modulation types via
>> the new API isn't a requirements, but it's a useful validation exercise
>> for the new S2API. What _IS_ important is..... that it also demonstrates
>> using the same tuning mechanism to tune DVB-S2 8PSK / NBC-QPSK
>> modulation types, and also has rudimentary ISDB-T support for any
>> developers specifically interested.
>> This S2API tree also contains support for the cx24116 demodulator
>> driver, and the Hauppauge HVR4000 family of S2 products. So those
>> interested testers/developers can modify the tune.c app demo and make
>> changes specific to their area, and try experimenting with the new API
>> if they desire. [1]
>> Obviously, tune.c isn't intelligent, it's not a replacement for szap,
>> tzap or whatever - it's simply a standalone S2API test tool, that
>> demonstrates the important API interface.
>> QAM/ATSC are working well, the HVR4000 changes look fine according to
>> the debug log (although I have no local satellite feed for testing
>> tonight). DVB-T should just work as-is, but I can't test this for a day
>> or so. I.E. I've tested what I can in the US but we might have a few
>> bugs or gotchas!
>> If anyone is willing to pull the tree and begin testing with the tune.c
>> app then please post all feedback on this thread. [2]
>> I've received a lot of good feedback of the original 2007 patches. I
>> expect to start merging those changes of the coming days. Don't be too
>> concerned that your changes are not yet merged, keep watching the S2API
>> tree and they will soon appear ... along with a lot of general code
>> cleanup (checkpatch violations)
>> I expect to catchup on my older email tomorrow.
>> Regards to all,
>> - Steve
>> [1] I'll need to review and diff any of the newer HVR4000 driver
>> derivatives that people have been using, before merging those changes
>> into the S2API tree.
>> [2] Remember you're going to need the cx24116 firmware if you're
>> specifically testing the HVR4000.... but you probably already know that! :)
>> _______________________________________________
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>> linux-dvb at linuxtv.org
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> Good news. I will test it with my cx24116 based cards (not HVR4000)


If you have any issues I'm on IRC, ping me - it could be something 
minor. I'm planning to grab a DVB-S generator today for some more 
testing this evening.

- Steve

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