[MPlayer-dev-eng] Unified ADPCM Decoder

[Alex Beregszaszi]

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
> 
> _______________________________________________
> MPlayer-dev-eng mailing list
> MPlayer-dev-eng at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/mplayer-dev-eng