Squeak-dev April 2005

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Re: Yahoo!
by Cg 11 Jun '05

11 Jun '05

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Where are system globals (Smalltalk and SystemOrganization)
by Aaron Gray 01 Jun '05

01 Jun '05

Are Smalltalk and SystemOrganization "global variables". If so where are the system globals and how do I list them, within a browser and say to the Transaction window from the workspace ? Aaron

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[Q] Squeak on Symbian
by Баскаков Даниил 31 May '05

31 May '05

Is it possible to run Squeak (or other Smalltalk) on Symbian? Are there any live projects? Is it difficult to build VM and prepare image by myself? Thanx...

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Yet Another SBC
by Frank Shearar 27 May '05

27 May '05

http://www.embeddedarm.com/epc/ts7200-spec-h.html >From the blurb: "TS-7200 Single Board Computer 200 MHz ARM processor for Linux * ARM9 processor with MMU * 32 MB SDRAM * 8 MB Flash drive (16 MB optional) * 10/100 Ethernet * Compact Flash * 2 USB host ports * 2 COM ports * 20 DIO * PC/104 expansion bus * Optional A/D and RS-485 * Optional 802.11b WiFi" What makes this interesting to be (with my Copious Free Time) is that the USB ports are HOST ports, unlike gunstix's CLIENT ports. The latter has always bugged me: I want an SBC to which I can plug in a NIC & a webcam and run a cheap SIP-based video source (aka "security camera", aka "baby monitor"). All on Squeak, of course! frank ******************************************************************* This email and attachments (if any) must be swept for viruses before opening. Their contents may be confidential or privileged and are intended solely for the named recipient. If you are not the intended recipient and you have received this email in error you must not read or use this email and should notify RNID on: +44 (0) 20 7296 8282. RNID, Registered Office 19-23 Featherstone Street, London EC1Y 8SL No. 454169 (England, Registered Charity No. 207720) ********************************************************************

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Improving Squeak's Multimedia - Part 2
by Brad Fuller 08 May '05

08 May '05

Hi All, Fantastic, we have several people who are interested and I hope willing to play a part in improving Squeak's Multimedia capabilities: Blake (Blake: what's your last name?) Dean Swan Craig Latta Russell Penney Steve Elkins Martin Kuball Yoshiki Ohshima Mark McCahill Juan Vuletich Cornelius Huber Brad Fuller I hope I didn't misspell or miss someone. If so, apologies. Let me start off the discussion by asking some hi-level questions. And, by all means, please chime in. I present only one slanted POV --- your views will be valuable to provide a robust analysis of the situation. === Multimedia Definition Maybe the first order of business is to achieve agreement on what we mean by "Multimedia". I looked it up after Martin's email and he's right - multimedia includes a variety of media such as the real-time areas (e.g. film/video, music) as well as static media (e.g. text, graphics.) Russell provided another interesting POV that containers could hold a multitude of multimedia assets. and that these basic frameworks could provide easy re-use. My 2cents: I was only thinking of "real-time" assets such as audio, music, video, etc. What are your thoughts on the definition of Multimedia? === Hi Level Interests? Furthermore, our definition of Multimedia may be a clear superset of what we want to tackle. For instance, it might turn out that we have just enough hands, or interest, to look at the audio classes; or maybe just video; or maybe the majority is only interested in adding MPEG4 to Squeak. For me, I'm obviously interested in only audio and video. I know this is broad, but I just want to get the top level issues out of the way. As an example of elimination, I am not interested in graphics or text. What are your interests? ==== Attack Plan Finally, I propose that we decide on what to tackle and how to do it. From a bird's eye view, we might look at 3 distinct phases (not necessarily linear in order - can be approached simultaneously): * Review/Discuss/Plan/Fix existing classes (which hopefully fix existing tools/apps) * Discuss-Design/Plan/Enhance existing classes * Discuss-Design/Plan/Add new capabilities: new classes, tools and end-user applications. (That's a lot, right there.) I'm willing to put in time, at the very least, toward fixing and enhancing the audio/music side of MM. I'm also interested in helping to test and use any video functionality - especially audio-video synchronization issues. Lastly, I would like to begin discussing new real-time capabilities for Squeak -- sort of plan while we get the house in order (the discussions might circumvent fixes, who knows.) What areas interest you? And, are you interested in helping? ===== Is This A Team? Finally, Finally, In light of the current squeak-dev traffic: Does this look like a team to propose? It seems orthogonal to the team proposals from the castaways. What do you think about MM as a team? Is it a sub-team? How does the rest of the Squeak community feel? brad BTW: Are there any related on-going projects that should be incorporated?

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Confused about SystemChangeNotification
by Andreas Raab 06 May '05

06 May '05

Hi - I am running into ever more trouble with SystemChangeNotification. Can somebody give me a brief rundown on how it is supposed to work? Any tests associated with it to document boundary cases? Here are two rather obscure issues that I am just running into: a) When I compile a method in another category, no recategorized event is generated. Why? It is impossible to find out where a method "came from" when using the modified event. This is easy to fix since the code in ClassDescription>>addAndClassifySelector: selector withMethod: compiledMethod inProtocol: category notifying: requestor explicitly suppresses this notification. But the question remains - why do it in the first place? b) When renaming a class the renamed event refers to the class under the old name. In other words, rather than getting our hands on the class under the name by which it is known in the environment we get it under the old name which no longer exists in the environment. Why? This is totally inconsistent - it exposes the fact that the invariant "aClass == aClass environment at: aClass name" is temporarily broken. Why? If there are any good reasons for the strange behavior above I'd really like to know why it behaves that way. Cheers, - Andreas

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[Newbie Q] getting the selection from TextMorph
by Steve Moffitt 06 May '05

06 May '05

Hi all, I'm trying to get the selected test from the TextMorph of PluggableTextMorph and I think I'm using overkill. Is there an easy way. I've looked at all the messages in PluggableTextMorph, TextMorph and TextMorphEditor and didn't really see anything. Any easy way. Thanks, Steve

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[ANN] Kedama version 2.0
by Yoshiki Ohshima 03 May '05

03 May '05

Hello, I've been working on a parallel particle programming system called Kedama. The last version wasn't quite good enough to announce, but I feel this version is a bit better. Kedama is deeply inspired by StarLogo and StarSqueak. In Kedama, you can control thousands of objects with eToy-like tile scripts. Please take a look at: http://www.is.titech.ac.jp/~ohshima/squeak/kedama2/ and give it a try. Thank you! -- Yoshiki

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Re: Dorado bytecodes per second
by Andreas Raab 02 May '05

02 May '05

> For the case of manipulating bitmaps we can always have a coprocessor > help out to fix the problem. While it would be great if some hotspot > could be found and eliminated from Morphic it is far more likely that > the overhead is distributed all over the place. That is most likely correct. Have a look at the current Compiler and ParseNodes which were written in the ugly old days and notice how they painfully avoid sending messages, and how they use pools for stuff that's considered really bad style today. What has changed since the old days is the general attitude - we happily pay the "price" of the extra message if it gives us a bit more flexibility, if it makes the code a little more easy to read. This simply didn't used to be the case "back then" and MVC is one of the areas that is full of "good old code" - I bet you a "modern" MVC would not perform any better or worse than Morphic. But adding a graphics processor is a good idea and will win you *big* on the small machines - most of which are bound by transfer speed over the bus anyway so having graphics go fast makes a much bigger difference than on the faster machines. Cheers, - Andreas

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implementation of a IFFT in Squak for a vocoder
by Cornelius Huber 02 May '05

02 May '05

Hi, I am currently working on squeak's audio capabilities. I have tried out some of the recording, playback and synthesis capabilities. Right now, I would like to build a vocoder using the FFT. The first step is to decode both input signals using the FFT and analyzing it's frequency bands. I found that this is somewhat already implemented in the class PhonemeRecognizerMorph. Now I need to modulate the second signal with the frequencies from the first signal, using an IFFT. I am not quite sure how to implement that. Can anybody help me implementing the code for a IFFT or possibly point to somewhere, where it already might be implemented? Thanks! Corny

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