Michael Zucchi

 B.E. (Comp. Sys. Eng.)


android (44)
beagle (63)
biographical (82)
business (1)
code (56)
cooking (29)
dez (6)
dusk (30)
ffts (3)
forth (3)
free software (4)
games (32)
gloat (2)
globalisation (1)
gnu (4)
graphics (16)
gsoc (4)
hacking (414)
haiku (2)
horticulture (10)
house (23)
hsa (6)
humour (7)
imagez (28)
java (216)
java ee (3)
javafx (48)
jjmpeg (67)
junk (3)
kobo (15)
linux (3)
mediaz (27)
ml (15)
nativez (3)
opencl (117)
os (17)
parallella (97)
pdfz (8)
philosophy (26)
picfx (2)
politics (7)
ps3 (12)
puppybits (17)
rants (134)
readerz (8)
rez (1)
socles (36)
termz (3)
videoz (6)
wanki (3)
workshop (2)
zedzone (13)
Friday, 13 March 2015, 13:25

ahh shit, google code is being scrapped

Joy. I guess it's not making google enough money.

I'll make a copy of all my projects and then delete them. Probably sooner rather than later (probably immediately because i'd rather get it out of the way, i have a script going now). I'm keeping all the commit history for now although i never find it particularly useful. Links in old posts may break.

Some of them may or may not appear later somewhere else, or they may just sit on my hdd until i forget about them and delete them by accident or otherwise.

Wherever they end end up though it wont be in one of the other commercial services because i'm not interested in doing this again.

I need to do the same to this blog, ... but that can wait.

Update: So ... it seems someone did notice. Don't worry i've got a full backup of everything. In part I was pissed off with google and in part I wanted to make it immediately obvious it was going away to see if anyone actually noticed. Who could know from the years of feedback i've never received.

If you are interested in particular projects then add a comment about them anywhere on this blog. All comments are moderated so they wont appear till i let them through but there is no need to post more than once (i'll delete any nonsense or spam unless it makes you look like a bit of a wanker). I will see about enabling anonymous comments for the moment if they are not already on. I can then decide what to do depending on the interest.

I will not be using github or sourceforge nor the like.

In a follow-up post i'll see where i'm going with them as well as pondering the future location and shape of the blog itself. I've already written some stuff to take the blogger atom stuff, strip out the posts, download images, and fix the urls.

(in resp to Peter below) I knew the writing was on the wall when google code removed binary hosting: it's kinda useless for it's purpose without it. This is why all my new projects subsequent to that date are hosted differently.

Tagged android, beagle, code, dusk, games, gloat, hacking, imagez, jjmpeg, mediaz, pdfz, puppybits, readerz, socles.
Tuesday, 11 February 2014, 13:07

verious.com is not authorised to copy this article?

Weird, looks like this blog has been put onto a site that sounds like 'various' and the posts are made to look like I write for them.

Never heard of them, nor are they permitted to re-post any of my posts.

Lets see if this one makes it on there ...

Tagged android, code, rants.
Monday, 10 February 2014, 16:18

Internode Freezone Internet Radio Player v2.2

I decided to update the Android Internode Radio Player today. I kept putting it off because I needed to fix up the web page and build a source-code distribution. Fortunately i'd done most of the GPLv3 work already.

More over on the project page @ internode.

This version is GPLv3 and includes the source-code.

Update: I moved the home page.

Tagged android, code.
Wednesday, 08 January 2014, 21:14

Fast Face Detection in One Line of Code

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(blogger is broken: this is supposed to be a pic)

Based on the work of the last couple of weeks I've written up a short article / paper about the algorithm and created a really basic android demo. I think it's something novel and potentially useful but i'm not sure if i'm just suffering from an island effect and it's already been tried and failed. I tried to find similar research but once outside of the software engineering realm the language changes too much to even know if you're looking at the same thing when you are. Statistics gives me the willies.

Since I did this at home and am not aquianted with the academic process I didn't know what else to do. None of my peers, aquaintances or contacts do similar work for a hobby.

I have created a basic 1990s style `home' page on my ISPs web server to store the paper and application and anything else I may want to put there. This may move in the future (and perhaps this blog will too).

And yes, it really does detect faces in a single line of code (well, significant code) - and we're talking C here, not apl - and on SIMD or GPU hardware it is super duper fast. I haven't even looked at optimising the OpenCL code properly yet.

I wasn't going to but I ended up creating an optimised NEON implementation; I kinda needed something to fill the timing table out a bit in the article (at the time; it filled out afterwards) but I guess it was worth it. I also wrote up a NEON implementation of the LBP code i'm using this afternoon and because it is only 4 bits it is quite a bit faster than the LBP8,1u2 code I used last time, although in total it's a pretty insignificant part of the processing pie.

Now perhaps it is time for summer holidays.

And just to help searchers: This is an impossibly simple algorithm for a very fast image classifier and face detector which uses local binary patterns (LBP) and can be implemented directly using single instruction multiple data (SIMD) processors such as ARM/NEON and scales very well to massively multi-core parallel processors including graphics processing units (GPU) and application processing units (APU). OpenCL, CUDA, AMD, NVidia.

Tagged android, hacking, ml, opencl, parallella.
Wednesday, 18 December 2013, 11:44

Android icon lists

I was hitting some performance / usability issues with a list of icons (sigh, again) ... and looking at the code I came up last time I just don't know what I was thinking. In part it stemmed from initially using an adapter without customising the view; so i was forced to use a standard ImageView.

Anyway, I think ... i finally worked out a relatively clean solution to a listview which contains images which are loaded asynchronously.

In short:

Without the last item you can end up loading the the image into the wrong imageview so end up with a missing icon - I recall having a lot of problems trying to workaround this last time, but this is a much more reliable and simple solution.

Previously I was trying to use notifyDataSetChanged() each time an image loaded as well as other nasty redirections to try and update properly whilst still coping with android (ab)using item 0 for it's own nefarious purposes (i presume it's for layout).

Originally i needed to load remote url's so I couldn't just use setBitmapURI() (otherwise i probably would've just used that at the time - it was a very short-on-time prototype), and although i currently don't need that functionality this manual code is smoother for the user and I can do other stuff like animations. The android code will delay drawing the screen until the image is actually loaded which adds a lot of judder particulalry if you're images might be large sizes.

Still not as nice as the JavaFX stuff I did, but it'll suffice. I will have to do something similar in the internode radio app - the solution there is different again but not very good either.

Tagged android, hacking.
Friday, 15 November 2013, 13:37

PicFX out

I did a bit of a clean, a README, some (not very good) tweaks to the layout files for a high dpi phone vs 7" tablet, and just checked in the code into:

I haven't cross-checked by building from a clean checkout from scratch so there could be some missing bits: i'll check when I can. I've also only built it on Fedora with some slightly older-than-current version(s) of the android ndk/sdk.

My previous post has some screenshots which are representative of the state of the code.

I did have grander plans but between my main work and it being a bit of a weird-arsed year and they didn't make it. However apart from some minor layout issues on small screens and the lack of capabilities, the basic operation and backend design i'm fairly pleased with for a couple of weeks work spread over 5 months.

Tagged android, code, ffts, hacking.
Thursday, 31 October 2013, 18:59

Revamped Streaming Internode Radio Player

Although I errr, blew up my amplifier a few weeks ago (gin & tonics and amiga demos DO mix, altogether too well, from what little I remember anyway) ... I went to look up some internet radio today and noticed they prettied up the index page and included icons.

So what was going to be a short hacking session ended up with a much improved "internode radio app" compared to the last one.

Rather than a hardcoded list it retrieves and parses the RSS feed for the list of stations every time it starts up, so it's current and now has the icons too.

Handles rotation without resetting the stream.

I spent close to an hour fighting with LinearLayout and RelativeLayout so i'm too pissed off to upload it right now.

I also just discovered that the layout is all fucked on a phone so i'll have to fix that first. So I wont be in any rush for that because the layout is fine on all the devices i own myself ...

Update: Didn't even let the ink dry on this but thought i'd get it out of the way. It can be downloaded over on my shitty internode page for it. I tweaked the layout too - it works ok on a tv, 7" tablet and an SG3, beyond that who knows with how android does its resolution stuff.

Update: Moved the app home page.

Tagged android, code, hacking.
Tuesday, 29 October 2013, 21:12


I haven't been working on this nearly as regularly as I should've been but here's a bit of an update on the demo android app I was doing for ffts (an fft library).

It was looking a bit bare so I added in the effects I came up with on the weekend. This pretty much forced me to revamp the whole backend again ... but after a few hours work it's all roses. Or tomatoes.

Because I was aiming for some performance the code isn't the best 'example' code, but what can you do eh. Some of the design made code re-use difficult so there's a bit of copy/paste. Even with straight C the interactive performance is very good - over 10fps during a basic convolution of 4 channels. Of course it's only updating a 512x512 tile to help with this interactive speed, but i'm using multiple threads for most of the work. I took the NEON code out for now so there's a little more to be gained although most of the time is spent within the fourier transforms.

Today I added a bit of branding and cleaned up the GUI a bit and so (finally!) it's almost to a releasable state.

Tagged android, ffts, hacking.
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