SoundSystem prototype implementation

by gerph 3 years ago secret

macOS ◆ xterm-256color ◆ fish 162 views

After the talk I decided to try to throw together some parts of the SoundSystem module to see how much I could get done and to help me understand the interfaces enough to be able to give some feedback.

I didn’t get too far - there’s a lot to take in, and it was already late - but I’ve got the hardware registration and deregistration implemented (and enumeration, probably). I’ve implemented a stub module that just registers itself and handles the service calls.

In the process I’ve read more of the spec and understood how some parts of the system fit together.

The recording shows the system starting up and some commands being run. The system starts with the SoundSystem module and the SoundPyromaniac (the fake ‘device’ module, that registers with the equally fake SoundSystem module). In the recording debug for both modules is enabled, and service call dispatch debug is also enabled.

As I didn’t get a huge amount implemented, this is literally just demonstrating that some lists can be manipulated and service calls acted on… but it’s at least helped with understanding.

You can see that SoundPyromaniac starts up before SoundSystem, so it gets an error, and so goes dormant. Then SoundSystem starts, announces itself and SoundPyromaniac is registered. The reinitialisation of both modules is shown to (seemingly) do the right thing.

More by gerph

Creating a changelog entry with changelog-management 01:14

by gerph 3 months ago

CLI expansion supports aliases in pyromaniac 00:15

by gerph 4 years ago

Building the RISCOS Kernel on Darwin. 00:06

by gerph 5 years ago

Pyromaniac using 'ansitext' VDU implementation 01:02

by gerph 4 years ago

See all

You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 366358.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/366358.cast',
      document.getElementById('player'),
      { cols: 127, rows: 40 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't offer GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed run the following command to create GIF file:

agg https://asciinema.org/a/ItOX6GwRCuhx54uY5J7UMGbP7 366358.gif

Or, if you already downloaded the recording file:

agg 366358.cast 366358.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.