[Bug 676495] [a52dec] really prefer the original number (and position) of channels

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=676495
  GStreamer | gst-plugins-ugly | 0.10.x

--- Comment #1 from Julien Isorce <julien.isorce at gmail.com> 2012-05-21 13:10:43 UTC ---
Created an attachment (id=214562)
 View: https://bugzilla.gnome.org/attachment.cgi?id=214562
 Review: https://bugzilla.gnome.org/review?bug=676495&attachment=214562

a52dec: really prefer the original number (and position) of channels

In the previous code, gsta52dec is trying to use (A52_STEREO | A52_LFE) instead
of original A52_3F.

The patch at least allows to use the original position if the requested number
of channels is equal to the original number of channels.

I think it needs more work to handle the case where the requested number of
channels is lower than original. Actually in most cases it should work but
"const int a52_channels tab[6]" should be computed ...

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