please allow ringtones in any format supported by GStreamer

[luca@…]

This generated on FSO-Milestone2 on Debian, see (1)(2).

Basically, since the user should be able to choose any ringtone she/he wants, hardcoding the audio codec is not the best option. Since Gstreamer provides the 'playbin' plugin (3) for this purpose, uses it!

The attached patch against FSO-Milestone2 implements that and has been tested with sid/wav/mp3/ogg. I'll port the patch to the Git repository later.

(1) ​http://bugs.debian.org/495668
(2) ​http://lists.linuxtogo.org/pipermail/smartphones-standards/2008-August/000220.html
(3) ​http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-playbin.html

[luca@…]

[FSO-Milestone2] use Gstreamer 'playbin' plugin for ringtone

[mickey]

playbin introduced too much latency. Instead, I have started using a codecmap. Which codec should I add for .ogg?

[luca@…]

Reopening the bug with a better title.

Replying to mickey:

playbin introduced too much latency. Instead, I have started using a codecmap. Which codec should I add for .ogg?

As I explained at (1), GStreamer doesn't provide a "codec" plugin for all the formats, e.g. for .ogg you need 'oggdemux ! vorbisdec ! audioconvert'. FWIW, the situation is similar for .wav, which uses wavparse.

While digging for a solution I found the decodebin plugin (2), which Google told me it needs GStreamer Dynamic Pads (3).

The attached patch is against FSO-Milestone2 (but I don't know Jono Bacon's blog license): it works nicely with sid/ogg (I'm not sure if the latency is now acceptable), but it segfaults with mp3/wav.

(1) ​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495668#10
(2) ​http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-decodebin.html
(3) ​http://www.jonobacon.org/?p=810

[luca@…]

[FSO-Milestone2] use GStreamer 'decodebin' plugin for ringtone

[mickey]

Will check, thanks.

[luca@…]

Yesterday evening (Thu, 23 Oct 2008 CEST) the FSO site was down, so I continued the discussion on the Debian bug (1) and also on the smartphones-userland mailing list (2).

The most interesting point, at least IMHO, is the fact that for the first time and thanks to videorecordings I discovered by myself how much latency is involved in milestone3, on upstream FSO image and Debian and with Arkanoid.sid or Yue's nothing2.ogg (3) (after having applied the attached patch).

(1) ​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495668#58
(2) ​http://lists.linuxtogo.org/pipermail/smartphones-userland/2008-October/000289.html
(3) ​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495668#38

[luca@…]

[FSO-Milestone3] use GStreamer 'decodebin' plugin for ringtone

[luca@…]

Replying to luca@…:

The most interesting point, at least IMHO, is the fact that for the first time and thanks to videorecordings I discovered by myself how much latency is involved in milestone3, on upstream FSO image and Debian and with Arkanoid.sid or Yue's nothing2.ogg (3) (after having applied the attached patch).

As Michael suggested (4), a partial solution would be to add "ogg = oggdemux ! vorbisdec ! audioconvert" to the decoder matrix (patch attached). With this solution, the latency for Ogg ringtones is still there, but reduced when compared to the decodebin approach (5).

Thus, the attached patch at least improves the current situation and fixes part of this ticket :-)

(4) ​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495668#63
(5) ​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=495668#68

[luca@…]

[FSO-Git] framework/subsystems/odeviced/audio.py: add Ogg decoder

[mickey]

Bandaid implemented. We even check and remove not-existing pipelines. That should be good enough.

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