Re: [Vnc2swf-users] Project Future

[Ian W. <ia...@ex...>]

I have a C module with a fallback to a python module in a library I 
wrote.  It's also nice to have a python implementation to validate the C 
implementation.

Don't fear C.  C runs everywhere.  If you don't want your users to need 
a compiler, I'm sure you can find volunteers to run "setup.py bdist_egg" 
on OSX, Windows, etc.

Also, if your library is fast more people will use it.

Ian

Matthias Sweertvaegher wrote:
> hello,
> 
> you could use the C library if it is found/built (check at startup), otherwise, just use the python code? :)
> 
> matthias 
> btw, I use it both under linux (home) & windows (work)
> 
>> -----Oorspronkelijk bericht-----
>> Van: Yusuke Shinyama [mailto:yu...@cs...] 
>> Verzonden: vrijdag 17 april 2009 1:16
>> Aan: General discussion about vnc2swf
>> Onderwerp: Re: [Vnc2swf-users] Project Future
>>
>> Hi,
>>
>> To create a speed-efficient recorder, we really need faster 
>> byte operations.
>> Probably the most expensive part in the current pyvnc2swf 
>> implementation is
>> just to convert the whole bitmap into another format. 
>>
>> More specifically, look at line 61 in image.py:
>>
>> def create_image_from_string_argb(w, h, data):
>>   data = ''.join([ data[i+1]+data[i+2]+data[i+3]+data[i] for 
>> i in xrange(0, len(data), 4) ])
>>   return pygame.image.fromstring(data, (w, h), 'RGBA')
>>
>> Now imagine a VNC server sends you a 1600x1200 bitmap (7.6MBytes)
>> That's a lot of data for doing this kind of operation for each frame.
>>
>> For some time I was thinking of writing some external 
>> functions in C, which
>> would be hundred times faster to do this kinda stuff. But it breaks
>> the beauty of platform-independentness.  This is the point 
>> where I was stuck.
>> People would need to install a C compiler to build pyvnc2swf. 
>> Perhaps it's not a big problem in Linux or *BSD, but I was 
>> afraid it brings
>> some extra trouble. I certainly expect complaints from 
>> Windows/Mac folks.
>>
>> So... how do you guys think? Maybe I should ask people what kind
>> of platform they are using. If cross-platform is not a concern, I
>> think this is the way to go.
>>
>> Yusuke
>>
>>
>> On Thu, 16 Apr 2009 22:33:16 +0200 (CEST), Olivier Hervieu 
>> <oli...@wa...> wrote:
>>> Great, 
>>>
>>> TheAmigo, i think that our needs are the same ... we have 
>> to record several (more than 2!!) vnc session on the same computer... 
>>> your idea to write a ffmeg plugin is great that might 
>> interressed people who wants to have an authoring/transcoding 
>> tool shipped with pyvnc2swf. 
>>> So for the next week i propose that everybody interressed 
>> in the project of a safe and fast vncrecorder to send on this 
>> mailing list what should and shouldn't be the the vncrecorder. 
>>> I propose the same for people who are interressed in an 
>> authoring tool to send here what should be this vncauthoringtool. 
>> --------------------------------------------------------------
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> ------------------------------------------------------------------------------
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> 300 plus technical and hands-on sessions. Register today. 
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