From: Hannu Savolainen
Subject: SDL uses obsolete OSS features

I was trying to compile SDL against the latest OSS version. It appeared
that SDL 1.2.7 is using a very old SOUND_PCM_WRITE_RATE ioctl that is
obsolete and has been removed from OSS. The right ioctl to call is
SNDCTL_DSP_SPEED. Attached is a patch (works with all OSS versions).

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From: Max Horn
Subject: [Patch]: Improved menu code for SDLMain.m

the attached patch improves the menu setup for SDL apps built without a
.nib file. On 10.3, the application menus are empty with the current
SDL CVS version; after this patch, a proper app & window menu, with
"About", "Hide", "Quit", "Minimize" etc. entries are visible, just like
with the .nib enabled applications.

This *should* work on 10.2 and even 10.1, but I can't guarantee it, so
somebody should test there, ideally.

I also changed the way setupWorkingDirectory works by making use of the
Bundle APIs, that results in (IMO) less hackish code.

Finally, I added some "static" keywords to ensure that certain local
functions are not exported (that's just a paranoia change, I guess:
never pollute linker namespaces if you can avoid it).

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From: Joost Baas
Subject: why call arts artsc?

I, and a few other people at the mplayer-docs-mailinglist were wondering why
you decided to call arts artsc. I understand usually users have nothing to do
with libsdl, just developers, but because you can choose the audio-driver
being used by mplayer, one of which is sdl, and you can also choose the sdl
subdriver, it is necessary to have a well-known or logical name. artsc is not
the logical choice, and it's very hard to look up the right name if you don't
know what you're looking for.

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From: "alan buckley"
Subject: Modification for RISC OS version of SDL

Ive attached a zip file with the changes to this email, it contains the
following:

The file sdldiff.txt is the output from cvs diff u.  .
The directory thread/riscos contains all the new files to support threading.

Readme.riscos is a new readme file to add.

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From: Ivo Danihelka
Subject: [SDL] [PATCH] Fixed XLocaleNotSupported in utf8 code

there exist X server configurations which does not support locales.
They even does not support conversion from utf-8 textList to utf-8
textProperty.

This patch fixes such situations. It is my bug because I submitted the
previous support for utf-8.

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From: Tomas Kovar
Subject: [SDL] [PATCH] UTF-8 support for SDL_WM_SetCaption in OSX

Recently, there was patch that added UTF-8 support for
SDL_WM_SetCaption in X11 backend. This patch does the same for Quartz
(OSX) backend.

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From: Christian Biere
Subject: [SDL] YUV Overlay vs. XV_AUTOPAINT_COLORKEY

I have a problem with SDL's YUV Overlay support using X11 Xv. Some people
reported that they get nothing but a black screen. I've compared the
output of xvattr they've sent me with the values I get here. It turned
out that XV_AUTOPAINT_COLORKEY was disabled. By enabling this feature
everything works fine.

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From: Aaron Perez
Subject: [SDL] Fwd: SDL not checking malloc returning NULL

I was reading through the code and i found that in several places does a
malloc and without checking if it is NULL just use the pointer.

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From: "Philippe Anctil"
Subject: [SDL] odd mouse event generated on init

The mouse relative and absolute coordinates appear to be always equal for
the first mouse event.

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surround sound on Linux using the Alsa driver.  To use them, naturally
you need a sound card that will do 4 or 6 channels and probably also a
recent version of the Alsa drivers and library.   Since the  only  SDL
output  driver  that  knows  about  surround sound is the Alsa driver,
you���ll want to choose it, using:

     export SDL_AUDIODRIVER=alsa

     There are no syntactic changes to the  programming  API.  No  new
library calls, no differences in arguments.

     There are two semantic changes:

(1) For library calls with number of channels as an argument, formerly
     you  could  use only 1 or 2 for the number of channels.   Now you
     can also use 4 or 6.

(2) The two "left" and "right" arguments to Mix_SetPanning,   for  the
     case of 4 or 6 channels,  no longer simply control the volumes of
     the left and right channels. Now the "left" argument is converted
     to an angle and Mix_SetPosition is called,  and the "right" argu-
     ment is ignored.

     With two exceptions,  so far as I know,  the modified  SDL12  and
SDL_mixer work the same way as the original versions,  when opened for
1  or  2  channel output.   The two exceptions are bugs which I fixed.
Well, the first, anyway, is a bug for sure.   When rate conversions up
or down by a factor of two are applied (in  src/audio/SDL_audiocvt.c),
streams with different numbers of channels (that is,  mono and stereo)
are treated the same way:  either each sample is copied or every other
sample is omitted.  This is ok for mono, but for stereo,  it is frames
that should be copied or omitted, where by "frame" I mean a portion of
the stream containing one sample for each channel. (In the SDL source,
confusingly,   sometimes  frames are called "samples".)   So for these
rate conversions,  stereo streams have to be treated differently,  and
they are, in my modified version.

     The other problem that might be characterized  as  a  bug  arises
when  SDL_mixer  is passed a multichannel chunk which does not have an
integral number of frames.   Due to the way the  effect_position  code
loops  over frames,  when the chunk ends with a partial frame,  memory
outside the chunk buffer will be accessed.   In the  case  of  stereo,
it���s possible that because malloc may give more memory than requested,
this potential problem never actually causes a segment fault.  I don���t
know.   For 6 channel chunks,  I do know,  and it does  cause  segment
faults.


     If SDL_mixer is passed defective chunks and this causes a segment
fault, arguably, that���s not a bug in SDL_mixer.  Still, whether or not
it counts as a bug, it���s easy to protect against, so why not?  I added
code in mixer.c to discard any partial frame at the end of a chunk.

     Then what about when SDL or SDL_mixer is opened for 4 or 6  chan-
nel  output?    What  happens  with  the  parts of the current library
designed for stereo?  I don���t know whether I���ve covered all the bases,
but I���ve tried:

(1) For playing 2 channel waves, or other cases where SDL knows it has
     to match up a 2 channel source with a 4 or 6 channel output, I���ve
     added code in SDL_audiocvt.c to make the necessary conversions.

(2) For playing midis using timidity,  I���ve converted timidity to do 4
     or 6 channel output, upon request.

(3) For playing mods using mikmod,  I put ad hoc code  in  music.c  to
     convert  the  stereo  output that mikmod produces to 4 or 6 chan-
     nels.   Obviously it would be better to change the mikmod code to
     mix down into 4 or 6 channels,  but I have a hard time  following
     the code in mikmod, so I didn���t do that.

(4) For  playing mp3s,  I put ad hoc code in smpeg to copy channels in
     the case when 4 or 6 channel output is needed.

(5) There seems to be no problem with .ogg files - stereo .oggs can be
     up converted as .wavs are.

(6) The  effect_position  code  in SDL_mixer is now generalized to in-
     clude the cases of 4 and 6 channel streams.

     I���ve done a very limited amount of compatibility testing for some
of  the games using SDL I happen to have.   For details,  see the file
TESTS.

     I���ve put into a separate archive,  Surround-SDL-testfiles.tgz,  a
couple of 6 channel wave files for testing and a 6 channel  ogg  file.
If you have the right hardware and version of Alsa, you should be able
to  play  the  wave  files  with  the Alsa utility aplay (and hear all
channels, except maybe lfe, for chan-id.wav, since it���s rather faint).
Don���t expect aplay to give good sound,   though.    There���s  something
wrong with the current version of aplay.

     The canyon.ogg file is to test loading of 6 channel oggs.   After
patching and compiling, you can play it with playmus.   (My version of
ogg123 will not play it,  and I had to patch mplayer to get it to play
6 channel oggs.)

Greg Lee <greg@ling.lll.hawaii.edu>
Thus, July 1, 2004

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From: Richard Smith
Subject: Re: [SDL] Disableing color depth and mode searching

> Also, I should add that a quick way to get the desired effect is to
> #define BROKEN_MODES on top of the SDL_fbvideo.c file.
>

Ah yes, I see that looks like that will do what I need.  Curious as to
why this is a #define and not an enviroment variable like the other
settings.

I would think that finding cards (or chips) with broken modes would be
the norm rather than the execption.

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From: "Philippe Plantier (ayin)"
Subject: [SDL] Problems allocating large surfaces

There are problems when allocating large surfaces using SDL_CreateRGBSurface.

When, for example, we try to allocate a surface wider than 16384 pixels,
the calculation of the pitch overflows; this leads to a surface that
has the w and h flags correctly set, but whose "pixels" buffer is too
small. That may lead to heap corruption.

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From: Martin_Storsj
Subject: Update for dynamic loading of ALSA

I sent you a patch a few months ago which enables SDL to load ALSA
dynamically. Now I've finally got time to tweak this yet some more. I've
added code from alsa.m4 (from alsa's dev package) to acinclude.m4, and
made the detection of the alsa library name a bit better. I've also
fixed up the loading versioned symbols with dlvsym, so that it falls
back to dlsym.

I wouldn't say the configure script is complete yet, but this is how far
I've come this time, and I'm no expert at those things.

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From: "Eckhard Stolberg"
Subject: Controller names in SDL for Windows

I'm working on an Atari 2600 emulator for different systems that uses
the SDL. Some time ago someone created an adaptor that lets you use
your old Atari controllers with your computer through the USB port.
Some of the Atari controllers require special handling by the emulator,
so it would be nice, if it would be possible to detect if any of the
controllers connected to the computer is this adaptor.

SDL would allow that with the SDL_JoystickName function, but unfortunately
it doesn't work properly on Windows. On Linux and MacOSX this function
returns the name of the controller, but on Windows you'll only get the
name of the joystick driver. Most joysticks nowadays use the generic
Microsoft driver, so they all return the same name.

In an old MSDN article
(http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarinput/html/msdn_extdirect.asp)
Microsoft describes how to read out the OEM controller names from the registry.
I have implemented this for the SDL controller handler on Windows,
and now reading the joystick name works properly there too.

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From: Eric Wing <ewing2121@yahoo.com>
Subject: New OS X patch (was Re: [SDL] Bug with inverted mouse coordinates in

I have a new patch for OS X I would like to submit.
First, it appears no further action has been taken on
my fix from Apple on the OpenGL windowed mode mouse
inversion problem. The fix would reunify the code, and
no longer require case checking for which version of
the OS you are running. This is probably a good fix
because the behavior with the old code could change
again with future versions of the OS, so those fixes
are included in this new patch.

But in addition, when I was at Apple, I asked them
about the ability to distinguish between the modifier
keys on the left and right sides of the keyboard (e.g.
Left Shift, Right Shift, Left/Right Alt, L/R Cmd, L/R
Ctrl). They told me that starting with Panther, the OS
began supporting this feature. This has always been a
source of annoyance for me when bringing a program
that comes from Windows or Linux to OS X when the
keybindings happened to need distinguishable left-side
and right-side keys. So the rest of the patch I am
submitting contains new code to support this feature
on Panther (and presumably later versions of the OS).

So after removing the OS version checks for the mouse
inversion problem, I reused the OS version checks to
activate the Left/Right detection of modifier keys. If
you are running Panther (or above), the new code will
attempt to distinguish between sides. For the older
OS's, the code path reverts to the original code.

I've tested with Panther on a G4 Cube, G5 dual
processor, and Powerbook Rev C. The Cube and G5
keyboards demonstrated the ability to distinguish
between sides. The Powerbook seems to only have
left-side keys, but the patch was still able to handle
it by producing the same results as before the patch.

I also wanted to test a non-Apple keyboard.
Unfortunately, I don't have any PC USB keyboards.
However, I was able to borrow a Sun Microsystems USB
keyboard, so I tried that out on the G5, and I got the
correct behavior for left and right sides. I'm
expecting that if it worked with a Sun keyboard, most
other keyboards should work with no problems.

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From: "Markus F.X.J. Oberhumer"
Subject: [SDL-CVS][patch] add missing SDLCALL to headers

the small patch attached below (against current CVS) adds some missing SDLCALL
decorations to callback types and arguments.

Unfortunately one of these changes breaks your gen{def,exp}.pl scripts which
should be changed to use non-greedy regular expression matching...

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From: Yves Maurischat
Subject: [SDL] Crashes when using aRts on Linux

We had a problem with my app using SDL. It always crashed after SDL_OpenAudio(),
if the artsd was running on a Linux machine with KDE. After some investigation
(and searching for differences in other apps using arts) we found out, that the
problem resulted from loading, calling arts_init(), calling arts_free() and
unloading the aRts-Library in .../src/audio/arts/SDL_artsaudio.c twice: first in
"static int Audio_Available()", the second time in "static SDL_AudioDevice
*Audio_CreateDevice(int devindex)".

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Give mouse position relative to window position, and do not generate mouse button event if outside of the window

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