The latest reincarnation of Hang The DJ, my music player, is coming along nicely. In the alpha stage, it’s currently an excellent way to stream your massive music collection to your laptop.

It sits atop an open source media streamer called Ampache. I had to extend Ampache to support the more advanced features of Hang The DJ. But this extended version of Ampache still retains its full feature set.

I have plans for a full set of Hang The DJ mobile clients, but they are further down the roadmap.

In the meantime, I can still use Ampache with my iPhone in a couple different ways. There are some Ampache iPhone clients but they are rough and limited. However, Ampache by itself has a nice web interface. You can play your music by downloading, by streaming, or through a bare-bones flash player.

Flash is out on the iPhone. Downloading each song is cumbersome. But the streaming works! It’s not foolproof. The silly Safari browser on the iPhone has a ridiculously short timeout on streaming requests, something like 16 seconds, and I don’t know of any way to adjust it. So for a long time, it just didn’t seem to work for me. But following these rules, I can get to my whole music collection from my iPhone:

• Make sure you have a decent server. I recently upgraded my server to use a quad core i7 cpu and it seems to help.
• Make sure your upload bandwidth is sufficient, obviously. I have really crappy crappy “10Mbit” service from CenturyLink, which gives me about 20kbps upload. Hates it. But it’s currently my only option and it’s working.
• Make sure your iPhone is in a 3G zone. Edge service through AT&T didn’t seem to work. Stupid AT&T.
• Stream 1 song first. This is your best chance of completing the setup between Apache and Safari before timing out. Once that’s confirmed to work, slowly bump it up until you get timeouts. I can do 3-4 songs but 20 seems to fail consistently.

Yeah it’s not ideal. Just more motivation to get going on the iPhone client! 🙂

In the meantime, shoot me an email if you’re willing to try Hang The DJ out on a desktop or laptop, that would rock. Peace.

GPT is a newer Intel-provided partition format replacement for the ancient MBR style, that only allows 4 primary partitions and, most importantly, can’t be used to boot off of drives 3TB or larger (yes you will be using one soon!). So I thought I would prepare for the future and get all set up. What a waste of time… (continued…)

I’m using the cross-platform Qt C++ library to write an app for linux, OS X, and Windows. Qt source can be compiled to a wide range of systems and devices, with two obvious omissions that are not likely to be filled any time soon: iPhone and Android. I know I am going to need client code on these devices, and I know that the client code is going to be extremely similar to the Qt client code. How do you design for this?

Applying the concept of separation of concerns, you design your classes into layers. The base layer consists of high level concept classes that perform all fundamental actions using generic data types. Then, the derived layer is used to get the job done, using the most useful and powerful lower level tools at your disposal. Push everything you can into the base layer, until you hit the limit of non-portable information and data types. It’s a beautiful way to code.

To be more specific, in my case, the base class layer will be using C++, including the STL, which gives me tons of power. I will pull in boost if even more horsepower is needed. The derived class layer for the first round of clients will be Qt-powered. The Qt library has a massive amount of real-world usefulness, supporting everything from http to video playback. I have not gotten to the iPhone and Android clients yet so the whole concept may change, but here’s my current plan. The iPhone code will be Objective C with the C++ base class layer linked in. I will attempt to incorporate the C++ base class layer into the Android code using the NDK.

Here’s a quick example of the layer approach, in this case used to quickly set up profiling using Qt’s QTime class at the lower level: (continued…)

Team Foundation Server (TFS) continues the long Microsoft tradition of horrible source control. It’s getting more annoying every day working with proprietary tools where some corporation decided how I should get my work done. Or in this case, not get my work done. TFS works, for the most part (which is more than you can say for Visual SourceSafe, its predecessor). But if you have a large number of shared projects under one directory, don’t even think about grabbing just one of them. Awesome. Here’s why… (continued…)

I have been so happy with my gentoo boxes lately, having had zero problems for the past few months, and no itch to bump. I must have lucked out and hit a really stable spot in the ever-changing world of open source.

But I don’t want to get too comfortable. Much longer and I probably won’t have a clean upgrade path. Besides, I think I smell something shiny out there somewhere… Seriously, I am looking forward to the latest XBMC changes. That software absolutely rocks.

Here we go! (continued…)