[Mplayer-users] New features...

[Felix Buenemann]

----- Original Message -----
From: "Christoph Lampert" <lampert at math.chalmers.se>
To: "Gábor Lénárt" <mplayer-users at lists.sourceforge.net>
Sent: Sunday, July 22, 2001 10:47 PM
Subject: Re: Re[2]: [Mplayer-users] New features...


On Sun, 22 Jul 2001, Felix Buenemann wrote:

> Hello Gábor,
>
> Sunday, July 22, 2001, 9:42:23 PM, you wrote:
>
> > On Sun, Jul 22, 2001 at 09:25:06PM +0200, Christoph Lampert wrote:
> >> Oh yes, and a --shutup option that makes mplayer _not_ use
> >> stdout for anything. That way is will one day be possible
> >> to use stdout as output-device, like pgmpipe in mpeg2decode.
>
> > Hmmm, this sounds good. IMHO the best solution would be changing
printf's
> > to mprintf or whatever ... That function would check a variable if
output
> > can be used or not. And we would have got an option to write messages
into
> > a specified file WHILE using stdout for output device or something
similar.
> > Also that function should be WELL designed with eg categories to be able
> > to use with GUI as well without major modification of source for future
> > GUI.
>
>
> btw. I also thought bout something like verbose classes, let's have
> class 1 which is for main mplayer code, 2 for demuxer, 4 for ao, I
> thinkl you get the idea, so if you want to debug only demuxer and ao
> you'd use -v 6. It would make verbose output more usefull for specific
> tasks.

Okay, but 1) not -v 6, because -v is verbose and _never_ has an argument.
Take e.g. -debug 6  or -debuglevel 6

and second, don't take 6, but a binary sceme like:
    it already is, noticed that I use 1, 2, 4 =)

0x00000001 is main function
0x00000002 is status reports (A-V etc)
0x00000004 is demux-code
0x00000008 is sync-code
0x00000010 is somethingelse
0x00000020 is somethingscompletelydiffernt
    why use hexadecimal, you talked of binary =)
    actually 1 sets bit 0, 2 bit 2, 4 bit 3 and so on, so you get uniquely
identifiable         numbers.
    IMHO we both had same idea you only didn't spot it in my message.

you get the general idea. That way, default may be level 0x03,
I already got it before =)
-debuglevel 0 switches of everything and 0xB make it possible to
view only demux messages (and std. output), etc.
    but it's much easier to take decimal numbers on commandline, so one
should pass     -debuglevel 11 or if we go to put more work into that use
keywords for the bits,     although I'd prefer -debuglevel main,demux=4,vo
which would give verbosity 0     main messages, verbosity 4 demuxer messages
and verbosity 0 vo messages.         (were 0 is default, not off)

perhaps also add a debug level, e.g.
0x00040000 is demux-debug-message (normally off)
    yes btw. I'd use another variable for storing verbose levels using 2
bits, which         should be enough (0..3), if not 3 bits should be enough
but were getting slowly         out of variable range as this would be 3
times number of bits used for flags, so we     should maybe use 16bits for
flags and 32bits for the levels (so 2bits/value) - imho     64bit ints are
not very portable, am I right?.
etc.

This is a bit of work to get it straight, but it might be a big help.
As a start one might give away different bits to different source-files.
we don't have enough bits =)
na, bits have to be given for tasks, like demuxer, decoder, vo, ao and so
on.

And there could be a global flag that makes mplayer print not only
the level, but also the flag under which is was called.

And who need new features anyway... writing different printfs is at least
as much fun, too. ;-)

gruel

--
Dipl. math. Christoph Lampert (complex analysis, integral formulae)
Email: gruel at gmx.de                |     Email: lampert at math.chalmers.se




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