PPP2 driver interface_pp.c overhaul

[Peter Pregler]

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On 30-Aug-99 Jacob Nikom wrote:
> Yes. I applied the Peter's patch and my frame rate dropped from 14 to
> 5.2.
> For display I used wcIIcam0.2 program written by Jean-Michel Merliot.
> Actually, it is quite nice program which allows you to control the
> camera
> or driver parameters. It has better image quality than main or main2.
> It also gives you frame rate.

Here is a quick patch to increase frame-rate. It is again versus the original
cpia-0.2. I had fps from 4 to 16 depending on the setting (double/normal/half
size, with/without compression). For normal size without compression frame rate
seems to be bound by the parport. For double size it might be cpu (i.e. my slow
PII-350 cpu ;). The wcIIcam program seems to consume some more cycles than the
plain main/main2 client. I have a look at that next week when I am back from a
short holiday. I have a few free days than so I might be able to test and add
the interrupt-driven code (i.e. implement a blocking read syscall). Maybe that
will bring some improvements in frame rate too. It is also a basic to do more
fancy stuff such as a video4linux interface. I have the framework for that but 
need some spare time. 

Greetings, Peter

-------------------------------
Even the thought that a ship was waiting to take him back to Earth
did not wipe out the sense of loss he felt at that moment.
-------------------------------
Email: Peter.Pregler@risc.uni-linz.ac.at
Peter Pregler / RISC, University of Linz, Austria

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