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SX510

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Offline srsa_4c

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Re: SX510
« Reply #170 on: 19 / November / 2015, 16:26:11 »
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Quote from: reyalp on 18 / November / 2015, 23:21:55
It looks like no further progress was made on this issue, and the define was not added in the trunk.
That define was actually removed, once nafraf found that zebra no longer crashes the camera without defining CAM_ZEBRA_NOBUF.
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To me, the symptoms like look some kind of memory corruption...
FWIW, if memory right below the allocated area (base pointer - 8) gets corrupted, free() will no longer work (checked this on a r50 camera, so it can be different here).
Also, it would be possible to hook malloc and free (their low level functions actually), but I don't know how much debug data that would generate.
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Offline reyalp

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Re: SX510
« Reply #171 on: 19 / November / 2015, 21:26:20 »
Quote from: srsa_4c on 19 / November / 2015, 16:26:11
Quote from: reyalp on 18 / November / 2015, 23:21:55
It looks like no further progress was made on this issue, and the define was not added in the trunk.
That define was actually removed, once nafraf found that zebra no longer crashes the camera without defining CAM_ZEBRA_NOBUF.
Yes, I did notice that eventually but apparently NOBUF stops the crashing again. :-[

I haven't had time to look at the zebra code yet to see if there are additional problems with the dimensions.
« Last Edit: 21 / November / 2015, 16:17:29 by reyalp »
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Offline reyalp

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Re: SX510
« Reply #172 on: 21 / November / 2015, 20:04:31 »
@joegiampaoli

Here's another test build for the zebra issue. I think the viewport height may have been incorrect before. Please check if zebra crashes, and if it doesn't, make sure it still looks correct.
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Offline joegiampaoli

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Re: SX510
« Reply #173 on: 21 / November / 2015, 20:34:57 »
 :D

It's drawing perfectly, updates as I move camera, no full screen blinking red. Memory is stable, no crashes, tried half press and full press, memory good after that. I just have to calibrate it now with the previews of the canon.

Thank you so much!  :)
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Offline joegiampaoli

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Re: SX510
« Reply #174 on: 21 / November / 2015, 20:36:12 »
Oh I haven't done the included tests to give you results, sorry about that, been so busy with work! I'll get to that ASAP!

Cheers!
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Offline reyalp

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Re: SX510
« Reply #175 on: 21 / November / 2015, 22:02:04 »
Quote from: joegiampaoli on 21 / November / 2015, 20:34:57
:D

It's drawing perfectly, updates as I move camera, no full screen blinking red. Memory is stable, no crashes, tried half press and full press, memory good after that.
Thanks for testing, I've checked that change in, so it will be in 1.4 autobuilds 4294 and later.
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I just have to calibrate it now with the previews of the canon.
You mean the threshold values?

Quote from: joegiampaoli on 21 / November / 2015, 20:36:12
Oh I haven't done the included tests to give you results, sorry about that, been so busy with work! I'll get to that ASAP!
No worries, you've already helped a lot :)
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Offline joegiampaoli

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Re: SX510
« Reply #176 on: 21 / November / 2015, 22:07:58 »
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Thanks for testing, I've checked that change in, so it will be in 1.4 autobuilds 4294 and later.

Perfect! I'll later download a fresh install to run it all freshly!

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You mean the threshold values?
Yes, I see I do have to raise the over-exposure values

One question, should the histogram be just the same as the one on the preview of canon's or not really since it's measuring a higher DR from the sensor and in a realtime way and not the JPEG's?
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Offline reyalp

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Re: SX510
« Reply #177 on: 21 / November / 2015, 23:10:59 »
Quote from: joegiampaoli on 21 / November / 2015, 22:07:58
Perfect! I'll later download a fresh install to run it all freshly!
There shouldn't be much need to re-test stuff that's already been tested with build I posted.
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One question, should the histogram be just the same as the one on the preview of canon's or not really since it's measuring a higher DR from the sensor and in a realtime way and not the JPEG's?
It won't be identical, but it should be recognizably similar. CHDK options like log vs linear, auto magnify etc. will affect how similar.

The CHDK histogram comes from the live view buffer, so it probably isn't higher DR than the Canon jpeg one.
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Offline joegiampaoli

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Re: SX510
« Reply #178 on: 21 / November / 2015, 23:18:26 »
Perfect! Just wanted to make sure if it was OK if histogram wasn't identical to what I saw in jpeg previews, but it does look similar as you say

Thanks again!
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Offline joegiampaoli

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Re: SX510
« Reply #179 on: 26 / November / 2015, 15:11:44 »
OK, I had some free time today to do some of the test scripts included in 1.4

isobase didn't create a log but this is the result I got from screen:

isobase.lua
BASE=200

I have a question about that isobase, does that mean that's the camera's "native true ISO"? like NIKON's that have 200 as base also? Or nothing to do with that? And do you know what is the true basic ISO in Powershots? 80? 100?  ???

Attaching one file with the logs, help that helps if needed for something and thanks for this awesome freedom! :)
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