A plugin for Future Composer audio files

[Michael Schwendt]

Hi everyone!

Although a newbie with regard to the various GStreamer APIs, I've
published a plugin for playing AMIGA Future Composer audio modules:

http://sourceforge.net/project/showfiles.php?group_id=45797&package_id=295132&release_id=633179

It uses a very old decoder backend that has been used a couple of times
before. Works fine here so far.

Very helpful in creating this has been the GStreamer Plugin Writer's Guide
(0.10.20.1). In particular the make_element script to create base source
files for a quick start.

An early hurdle I ran into is that I as soon as I used "gst-launch-0.10
playbin uri=" or Rhythmbox to test the plugin, the audio files refused to
load. It turnt out that I had to implement a typefind function as one of
the first things, or else some mpeg plugin would accept my input files
and fail to play them.

Another thing I wondered is where to find a list of what must be
implemented? For example, when adding support for seek events, I didn't
know what GST_FORMAT_* parameters I need to handle. It may be that my
0.1 implementation is only a subset that works with Rhythmbox and needs
more to not be too limited.

--
Michael Schwendt
Fedora release 9 (Sulphur) - Linux 2.6.26.5-45.fc9.i686
loadavg: 2.56 2.24 1.81

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[Stefan Sauer]

hi,

Michael Schwendt schrieb:
> Hi everyone!
>
> Although a newbie with regard to the various GStreamer APIs, I've
> published a plugin for playing AMIGA Future Composer audio modules:
>
> http://sourceforge.net/project/showfiles.php?group_id=45797&package_id=295132&release_id=633179
>
> It uses a very old decoder backend that has been used a couple of times
> before. Works fine here so far.
Cool stuff!

>
> Very helpful in creating this has been the GStreamer Plugin Writer's Guide
> (0.10.20.1). In particular the make_element script to create base source
> files for a quick start.
>
> An early hurdle I ran into is that I as soon as I used "gst-launch-0.10
> playbin uri=" or Rhythmbox to test the plugin, the audio files refused to
> load. It turnt out that I had to implement a typefind function as one of
> the first things, or else some mpeg plugin would accept my input files
> and fail to play them.
>
> Another thing I wondered is where to find a list of what must be
> implemented? For example, when adding support for seek events, I didn't
> know what GST_FORMAT_* parameters I need to handle. It may be that my
> 0.1 implementation is only a subset that works with Rhythmbox and needs
> more to not be too limited.
>

I don't think you miss a lot. Have a look at the modplug plugin in
gst-plugin-ugly and the timidity/wildmidi plugins in gst-plugins-bad. These are
somewhat simillar.

Stefan

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