[MPlayer-dev-eng] Questions About Audio Decoding

[Alex Beregszaszi]

On Fri, Dec 21, 2001 at 01:10:15PM -0700, Mike Melanson wrote:
> On Fri, 21 Dec 2001, Alex Beregszaszi wrote:
> 
> > are you willing to add only apple variant of rle? (i mean 4bit msrle variant
> > can be added too)
> > have you got some samples? can you upload it?
> 
> 	What other flavors are there besides Apple and MS? The MS flavor
> is already covered by the adapted XAnim code. Doesn't it handle the 4-bit
> variant? Oh...I just looked at the code and saw that it's not covered.
> Okay, I'll try to add that, too. Should I rewrite the MS-RLE8 decoder as
> well, in order to help reduce the volume of that weird XAnim code in the
> codebase?

4bit variant isn't handled. i think writing a new rle decoder would be cool
(to reduce the xanim codebase), but first ask arpi about this :)
Hmm, have you completed the yuv outputs for the decoder you've written?
RLE decoder should be written with YUV output support, whit this feature
it would eat the xanim code :)

Also, what's your time order in the TODO list you've written?

> 
> 	As for the samples, I already have some QT files that use (I
> believe) 24-bit RLE. However, I know someone who works with Apple
> multimedia and I'm going to politely ask her to make up some samples of
> all 7 variants for testing. I'll be sure to share with the rest of the
> group, too.
> 
> > did you saw the sourcecode? i think it's hard to implement it into mplayer
> > (the win32 version is fully completed in the sources, the linux one is
> > non-completed), but i wish you good luck to it.
> 
> 	Yeah, I have all the source code. Anyone who registers (freely) at
> vp3.com is welcome to download the latest CVS snapshot, and also access
> the repository and developer's BBS. I just need to sift through it all and
> find the modules to which I can feed compressed frames and get back
> decompressed frames. And I believe the VP3 license is loose enough that we
> can just include the relevant source files into the MPlayer codebase.
> 
> 	Unless, by "did you saw the sourcecode?", you meant "have you
> glanced at the sheer enormity of the task ahead?" Well, all I can say is
> that I figured out enough of the MPlayer codebase to add a video decoder
> AND a file demuxer...there is *no way* the VP3 source could be more
> convoluted...:) (and it isn't; I've seen it)
> 
> 	-Mike Melanson
> 
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--
alex