|
|
|
This thread is locked; no one can reply to it.
|
1
2
|
| Announcement regarding APEG |
|
Kitty Cat
Member #2,815
October 2002
 |
For those that may or may not know, APEG has been my little side-project-baby-thing for quite a while. When I last worked on it several moths ago, the code was in shambles. The audio playback was using my proprietary mixer streams since I was having problems using Allegro's audio streams skipping horrendously, I couldn't get the video and audio to sync up no matter what I did, I was experimenting with the new functionality's API, and by the time I set it down, I had the audio code completely disabled. Much has happened since then, including a complete reinstall of Gentoo Linux. However, I decided yesterday to take a peak at the code and see if I could think of anything. Here's an update of what I've done in the past 12 hours.
</li> APEG's audio capabilities include:
</li> However, all is not currently sunny-happy-bright in the kingdom of APEG. There are a few glaring problems, one of which I have never run into before (and I know wasn't there when I last tried it before restarting work). For some reason, when exiting, pthreads will trigger a SIGABRT signal. I have no idea why or exactly where since there's no useable backtrace, even in debug mode. I have a feeling it's somewhat related to all the SIG32 signals I now get in gdb since I reinstalled Gentoo. Other problems are.. 1:1 playback is currently b0rked. I haven't had the opportunity to look into why yet, though 2:1 and 4;1 playback is fine. It's not quite multi-stream safe, yet (opening more than one audio stream will b0rk the program). The audio API isn't completely finished. And I haven't fully cleaned out the code from when it used to be a standalone, mpg123 lib example player. But other than that, yeah. It's progressing much faster than I anticipated. Once I get the above issues worked out, expect to see a beta release. -- |
|
Steve Terry
Member #1,989
March 2002
 |
Sweet KC... keep up the work on APEG ___________________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
Small appendature to the above: The 3DNow-enhanced 1:1 decoder is currently b0rked. The normal 1:1 decoder is fine. Unfortunately this means I'll have to dable in the asm to fix (or at least find the cause).. which isn't necesarrilly impossible.. I had to make a small adjustment to the MMX asm. Just don't hold your breath. -- |
|
spellcaster
Member #1,493
September 2001
 |
Wow! Great work - thanks a lot. -- |
|
Steve Terry
Member #1,989
March 2002
|
Do you have a download link or a link to the project page? ___________________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
The only page I have for it is at http://kcat.strangesoft.net/. Not much to look at, and the version there is an older version. -- |
|
A J
Member #3,025
December 2002
 |
if you need testers, let me know. ___________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
Ok, hopefully this will work elsewhere. The only issues there currently are are finalizing the new API parts and the dumb Abort message I get in Linux. Here's a pre-release of APEG 0.9, for your testing pleasure. http://kcat.strangesoft.net/apeg-src.tar.gz ~4.2MB with a test stream The docs haven't really been updated since the last version. Just extract, run fix, then make (append DEBUGMODE=1 to make for a debug build). That'll build the lib and two example players. What I would like you to be on the lookout for, other than the usual, is skipping, eratic pauses, etc. -- |
|
A J
Member #3,025
December 2002
|
using mingw g++ (GCC) 3.2 (mingw special 20020817-1) D:\tmp\APEG_V~1>fix mingw Configuring for MinGW... D:\tmp\APEG_V~1>set DEBUGMODE=1 D:\tmp\APEG_V~1>make ___________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
Hmm.. I thought Windows compilers predefined byte. -- |
|
Steve Terry
Member #1,989
March 2002
|
D:\Documents and Settings\Steve Terry\Desktop\apeg\apeg>gcc -v [snip] ___________________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
Alright. Hopefully I got the problems sorted out. At least I got one report of a successful windows build. The archives were updated: http://kcat.strangesoft.net/apeg-src.tar.gz Just to reiterate.. it is not complete. Some functionality is not complete, and it is not recommended you use this in your programs (though I won't stop you if you really want to). If this works, it shouldn't be too long before a real release. Oh yes.. this should work under OSX again too, hopefully. -- |
|
A J
Member #3,025
December 2002
|
excellent work, it compiles on winXP now, with mingw 3.2 next problem... D:\tmp\APEG_V~2\examples>exsimple.exe "Digital Skateboarding - #10 Everyday Skate Videos.mpg" D:\tmp\APEG_V~2\examples>ren "Digital Skateboarding - #10 Everyday Skate Videos.mpg" d.mpg D:\tmp\APEG_V~2\examples>exsimple.exe d.mpg
it failed to load my skate mpg, so i renamed it to d.mpg and it worked. ___________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
I think it has to do with the # in the filename. Allegro's packfile routines expect everything before it to be a datafile, and everything after to be a datafile object. I'll try to remember to bring this issue up on AD. -- |
|
Steve Terry
Member #1,989
March 2002
|
I get an average of 50% frames skipped on windowed and fullscreen playback and the sound is a bit staticy but it's looking good though. AMD Athlon 1900+ ___________________________________ |
|
Kitty Cat
Member #2,815
October 2002
|
Update. http://kcat.strangesoft.net/apeg-src.tar.bz2 Note they're bz2 format now, so the old gz urls won't work. -- |
|
ReyBrujo
Moderator
January 2001
 |
I got the following warnings (MinGW v3.2.3):
explay works fine graphically, but sound is still awful, you hear like static. With MinGW 2.95.3-6, fails here: gcc -x assembler-with-cpp -DASM_PREFIX\(x\)=_##x -o obj/mingw/dct36_3dnow.o -c s rc/audio/dct36_3dnow.s src/audio/dct36_3dnow.s:10: unterminated character constant src/audio/dct36_3dnow.s:19: unterminated character constant make: *** [obj/mingw/dct36_3dnow.o] Error 1 Though I would not worry for this one, I guess I have something old there. -- |
|
Kitty Cat
Member #2,815
October 2002
|
Quote: warning: argument `sequence' might be clobbered by `longjmp' or `vfork'
If anyone can provide me with a -W switch to shut this warning up, I'd be grateful. Quote: Warning: rest of line ignored; first ignored character is `,' Okay, I don't know what's wrong with these. The lines that are producing this warning are: .long 1 // two of these .data intwinbase: there's no commas at all, even on the lines right after it. As for the sound static, I don't know.. what if you try downsampling (-downsample 1 or 2 with explay)? If that doesn't fix it, then could you try building with NO_ASM (make sure to make clean before this)? Quote: src/audio/dct36_3dnow.s:10: unterminated character constant It seems the preprocessor is behaving differently. Older versions seem to be treating ' as a character constant, even in # comment lines. I'll try and clear this up (I didn't really expect # asm comments to work right with the preprocessor anyway). -- |
|
ReyBrujo
Moderator
January 2001
|
About the sound issue, I would wait until someone else tries with their files, most of my files are MPEG-2, these are old ones. Using downsample helps, so it might be static sound present already in the sample. How you got those lines are the ones triggering the warnings? Oh, and I have no idea how to skip that warning. (Edited: compiled fine with GCC v3.2.2 under Mandrake, and sound lacks there too, guess it is the stream. Warning with the clobber stuff, but the assembler was fine). -- |
|
Kitty Cat
Member #2,815
October 2002
|
The code around the clobber warning line is this: int apeg_reset_stream(APEG_STREAM *stream, int sequence) { APEG_LAYER *layer = stream->layer; int ret; if((ret = setjmp(jmp_buffer)) != 0) return ret; // If sequence_num is less than 0, reset to the current stream if(sequence < 0) sequence = stream->sequence; ... It probably has to do with some optimization GCC is trying, because debug builds don't produce the warning. And when you say downsampling helps with the static, does that mean it goes away or is just less noticeable? If it goes away, there might be a problem with the 1:1 decoder being selected (do you have 3dnow and mmx? Allegro's tests/test program will say). What about the stream that's in with the examples (if you downloaded that version)? (EDIT: the code boxes seem to like adding extra line breaks when I use tab characters. -- |
|
ReyBrujo
Moderator
January 2001
|
Any search for the warning gives the same result: reestructurate the code for not using setjmp, or don't use -Wall, like in this message. Now, downsampling under Linux: 1 lowered the noise, 2 made it disappear. Under Windows, downsampling 1 or 2 makes no sound at all be generated. (Edited: test.exe reports: CPU family: 1586 / cpuid/ FPU / cmov / SSE / SSE2 / MMX / MMX+ (Edited 2: And I was referring as to how you knew .long and so were the ones giving warnings). -- |
|
Kitty Cat
Member #2,815
October 2002
|
Quote: Now, downsampling under Linux: 1 lowered the noise, 2 made it disappear. Under Windows, downsampling 1 or 2 makes no sound at all be generated. Okay, that makes little sense. The only difference between the downsampling modes are the decoder functions used and the audio stream's playback frequency. While the noise being lowered makes sense (and thus seems to indicate that it is the stream), it makes no sense to why Windows would lose sound. Quote: Edited: test.exe reports: CPU family: 1586 / cpuid/ FPU / cmov / SSE / SSE2 / MMX / MMX+ --yep, Intel-- Okay.. I disabled the 3dnow stuff and played a few streams.. it all sounds fine. So either you played a bad stream, or APEG's not properly decoding the stream for some resaon. Quote: (Edited 2: And I was referring as to how you knew .long and so were the ones giving warnings).
Because the warning message had line numbers. -- |
|
ReyBrujo
Moderator
January 2001
|
I hate when anyone guesses unix tools because I have sh.exe in my path Now, compiling with NO_ASM increases notably the noise. And happens with some more mpeg files I had around. -downsample works here, though. They are played well enough with Media Player. And since there is no , in the assemble clode, I still have my doubts about the lines you guessed... -- |
|
Kitty Cat
Member #2,815
October 2002
|
Quote: I hate when anyone guesses unix tools because I have sh.exe in my path APEG doesn't. I might've accidently slipped in a command that's needs unix/unix tools.. what is it? Quote: Now, compiling with NO_ASM increases notably the noise. And happens with some more mpeg files I had around. -downsample works here, though. They are played well enough with Media Player. Somewhat makes sense, since the downsampling synth code is C anyway (the dct code is a different story, but I guess that means it's not the dct code if downsampling is just like before). Also, out of curiousity, which sound driver are you using? The 4.0.3 default? What if you use the AllegMix driver? Quote: And since there is no , in the assemble clode, I still have my doubts about the lines you guessed... Which is why I'm completely baffled by it. Maybe it has something to do with the preprocessor.. -- |
|
ReyBrujo
Moderator
January 2001
|
Hmm... this is strange... I think it is because my sh.exe is outdated: make said: gcc -x assembler-with-cpp -DASM_PREFIX\(x\)=_##x -o obj/mingw/dct36_3dnow.o -c s
make clean said: del obj\mingw*.* About the assembler error: Line 38 is .comm buffs.40,4352,32. (Edited: added the assembler error correctly) -- |
|
|
1
2
|
Oh well, here's a fixed file (put it in apeg's include dir, overwriting the old file).