[mythtv] [patch] multichannel ac3 audio v11
mark at dclabs.com.au
Tue Jan 24 02:53:52 UTC 2006
ok Ive finally found the channel swap problem in ac3. the encoder and
decoder are not symetric.
dts decoder channels are also not symetric.
what alsa and other 6 channel audio outs require is
L R LS RS C LFE
this is what dts decoder outputs
what AC3/A52 decoder outputs is
(LFE) L C R LS RS
what the AC3 encoder requires is
L C R LS RS LFE
so I have rejigged the decoder and encoder to support the invariant format.
bill this is why your buff+1 patch worked with 1 sample LFE being
indeterminate every 32ms.
please test as Im not able to until this evening.
next will be mmx support assuming all goes well.
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