[MPlayer-dev-eng] Unified ADPCM Decoder

[JAF]

I tested to existing (native) g.72x codec, it does not work
with any of my VIVO-testfiles.

mfg Johannes

 On Wed, 26 Dec 2001 15:17:27 +0100
 Alex Beregszaszi <alex at naxine.org> wrote:
> Hi,
> 
> Mike, could you write decoder for Vivo G.723 or Siren (i
> think they're are
> all G.723 based)?
> 
> --
> alex
> 
> On Tue, Dec 25, 2001 at 11:09:00PM -0700, Mike Melanson
> wrote:
> > Hi team,
> > 	So I didn't get as much done this weekend as I had
> hoped. But I
> > did do a bunch with ADPCM. Without any prior
> authorization, I've just
> > committed the basis of a unified ADPCM decoder. When I
> say "unified", I
> > mean "all of the ADPCM code in one place". So far, it
> just has a rewrite
> > of the IMA4 ADPCM decoder which does mono properly and
> almost has stereo
> > right, too (something that the old ima4.c didn't do).
> I'm still working a
> > kink out the stereo portion, but I'm really close; I
> can tell because the
> > sound is almost coherent on The Phantom Menace "A"
> trailer.
> > 
> > 	I have the data formats in hand for both MS ADPCM and
> that format
> > 0x62 I've been working with. I will implement them both
> in the same module
> > as soon as I can. I've also written a document about
> all of the formats
> > and will publish it on my CRI site as soon as I'm
> confident it's all
> > correct (i.e., I've implemented them all based on the
> document).
> > 
> > 	Quick question on the audio: Am I correct in assuming
> that stereo
> > PCM samples are interleaved, LRLR...? Therefore,
> output[0],
> > output[2]...output[2n] will all be left channel, while
> output[2n+1] will
> > all be right channel?
> > 
> > 	Thanks...
> > -- 
> > 	-Mike Melanson
> > 
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