[MPlayer-dev-eng] Unified ADPCM Decoder

[Alex Beregszaszi]

Hi,

On Wed, Dec 26, 2001 at 03:27:31PM +0100, JAF wrote:
> I tested to existing (native) g.72x codec, it does not work
> with any of my VIVO-testfiles.

yeah, becouse VIVO uses other values (see demux_viv.c) than g72x supported

--
alex

> 
> 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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> 
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