ATRAC3 Player Sample

moonlight · Post by **moonlight** » Tue Apr 18, 2006 4:54 pm

This is a sample showing a simple atrac3 player using the libatrac3plus from the firmware.

Warning (to avoid confussion): the use of the libatrac3plus library functions was deduced with a bit of reverse engeneering in the own library and how a game was using it, by hooking calls to the functions and inspecting how the parameters evolved (psplink was of great help, thanks Tyranid for making that beautiful tool)

This program does not pretend to be a serious player, it's only a sample on how to use the sceATRAC3plus_Library, and it may have some bugs or incorrect code.

Third version changes:
- use of sceAtracGetMaxSample to find the appropiated channel size.

http://www.megaupload.com/?d=87UL06DC

Second version changes:
- the bug of the threads not created is gone
- recompiled making use of pspatrac3.h/libpspatrac3 included by Tyranid in the PSPSDK this week.
- faster search of files by filtering extensions (it will search only at3, pbp, toc, a3p and wav)

http://rapidshare.de/files/18713456/AT3 ... 2.zip.html

First Version:
http://rapidshare.de/files/18292583/at3player.zip.html

dot_blank · Post by **dot_blank** » Tue Apr 18, 2006 6:16 pm

wow amazing!
this is an excellent reversal
my hat goes offf to you

weltall · Post by **weltall** » Tue Apr 18, 2006 7:49 pm

good work :)

weak · Post by **weak** » Tue Apr 18, 2006 9:44 pm

excellent

jonny · Post by **jonny** » Tue Apr 18, 2006 10:26 pm

awesome!

Post by **TyRaNiD** » Tue Apr 18, 2006 11:30 pm

Ive put the atrac3 stubs into pspsdk and shameless c&p the function prototypes from moonlights sample. However as these are user mode functions they are close to useless for normal elfs :) So youll either have to do the function fixup trick as shown in the sample or preload the atrac library before your user mode application :)

TheHorst · Post by **TheHorst** » Wed Apr 19, 2006 4:08 am

very nice ...

just one queation, why does it stop playing the at3s after u have played 5 or 6?

does this only happen to me??
i´ve compiled your sample ...

w0lv3121n3 · Post by **w0lv3121n3** » Wed Apr 19, 2006 10:21 am

Well done!
I was wondering, does this let us play Atrac files in our 1.5 psp?

weltall · Post by **weltall** » Wed Apr 19, 2006 4:40 pm

thanatos · Post by **thanatos** » Wed Apr 19, 2006 7:47 pm

：P come on ，have further try

__count · Post by **__count** » Thu Apr 20, 2006 12:10 am

Any clues on the performance of this built in lib? Does it look like it outperforms libmad?

thanatos wrote:：P come on ，have further try

?

weak · Post by **weak** » Thu Apr 20, 2006 12:29 am

as i understand it atrac is decoded through the ME. so actually it should free all cpu time libmad uses for audio decoding?

Mathieulh · Post by **Mathieulh** » Thu Apr 20, 2006 1:37 am

It's a great reverse engeneering job you've done here moonlight, Although it would be more interesting to reverse engeneer the way the psp play AVC files (while playing a pmf or a mps (UMD Video) ) as the psp uses AVC hardware decoding so it can play smoothly any avc file at 222mhz and probably in user mode.
Then we could play avc videos at 480x272 witch would be great considering that avc is a great video format.

moonlight · Post by **moonlight** » Thu Apr 20, 2006 1:57 am

Mathieulh wrote:It's a great reverse engeneering job you've done here moonlight, Although it would be more interesting to reverse engeneer the way the psp play AVC files (while playing a pmf or a mps (UMD Video) ) as the psp uses AVC hardware decoding so it can play smoothly any avc file at 222mhz and probably in user mode.
Then we could play avc videos at 480x272 witch would be great considering that avc is a great video format.

In fact i was thinking of taking a look on how the firmware decodes the MP4 files (using the sceMpeg i suppose), and see if somekind of patch could be done to play 480x272 MP4 through the firmware.
But this will be probably harder this time, we don't have all the NIDS :(
http://pspdev.ofcode.com/api2.0/index.php?type=2&id=76

But well, i suppose that one does loose nothing for trying ;)

Mathieulh · Post by **Mathieulh** » Thu Apr 20, 2006 2:59 am

Well the problem is that 1.50 fw can only natively play MP4 SP files and the mpeg4 SP codec sucks, the highest quality file encoded with the SP format at 480x272 takes a LOT of space (about 200MB for 30 minutes of playback) while avc videos would be even lighter than pmp files (xvid/divx muxed with mp3 track) and would take much less ressources considering the fact that the psp features avc h.264 hardware decoding, in fact the avc codec allready exists in 1.00/1.50 and is beeing used while playing pmfs or UMD Video, it's only because sony wanted to promote the umd videos that they didn't input the avc playback feature from memory stick directly in the firmware (they finally did with 2.00 because they wanted people to update their psp systems)

weak · Post by **weak** » Thu Apr 20, 2006 4:40 am

i'm just wondering how it's possible to encode your own at3 files.

i tried that horrible sonic stage software from sony. you can convert your files to atrac3/atrac3plus with .oma ending. (maybe another container? i've got no idea).
but doesn't seem like those files are recognized as atrac3 files.

anyone managed to convert and play some files?

edit:

just used this tool and it works great. thx jouni ;)

weak · Post by **weak** » Thu Apr 20, 2006 7:30 am

moonlight wrote: - There is a bug in which sometimes one of the threads cannot be created because the previous copy of the thread is already running (probably, because of a deadlock).

seems like you have to delete the threads after they've finished (although you explicitly wait for end):

Code: Select all

sceKernelWaitThreadEnd&#40;playth, NULL&#41;;
sceKernelWaitThreadEnd&#40;decodeth, NULL&#41;;
+sceKernelDeleteThread&#40;playth&#41;;
+sceKernelDeleteThread&#40;decodeth&#41;;

fixes it for me

moonlight · Post by **moonlight** » Thu Apr 20, 2006 7:52 am

weak wrote:
moonlight wrote: - There is a bug in which sometimes one of the threads cannot be created because the previous copy of the thread is already running (probably, because of a deadlock).
seems like you have to delete the threads after they've finished (although you explicitly wait for end):
Code: Select all
sceKernelWaitThreadEnd&#40;playth, NULL&#41;;
sceKernelWaitThreadEnd&#40;decodeth, NULL&#41;;
+sceKernelDeleteThread&#40;playth&#41;;
+sceKernelDeleteThread&#40;decodeth&#41;;
fixes it for me

Thanks for pointing that out! Probably i'll rewrite it tomorrow or the next day fixing that and using the new pspatrac3.h header that Tyranid has added to the pspsdk.

w0lv3121n3 · Post by **w0lv3121n3** » Thu Apr 20, 2006 8:28 am

how come it doesnt detect the atrac files i put in my psp?

majinboo · Post by **majinboo** » Thu Apr 20, 2006 8:05 pm

w0lv3121n3 wrote:how come it doesnt detect the atrac files i put in my psp?

Maybe you put some *.oma files that can't be read by the PSP. You need to use EAC PSP Edition to make your atrac3 files for the PSP.

moonlight · Post by **moonlight** » Sat Apr 22, 2006 10:11 pm

I've updated the sample. (see the first post).

majinboo · Post by **majinboo** » Sun Apr 23, 2006 2:09 am

It seems that the new version doesn't detect .toc fils. These files are Atrac3 files created with EAC PSP Edition. The first version is able to play these files without any problems.

moonlight · Post by **moonlight** » Sun Apr 23, 2006 2:42 am

majinboo wrote:It seems that the new version doesn't detect .toc fils. These files are Atrac3 files created with EAC PSP Edition. The first version is able to play these files without any problems.

Ok, now it's fixed and updated the link. I didn't know that extension.

majinboo · Post by **majinboo** » Sun Apr 23, 2006 3:48 am

moonlight wrote:
majinboo wrote:It seems that the new version doesn't detect .toc fils. These files are Atrac3 files created with EAC PSP Edition. The first version is able to play these files without any problems.
Ok, now it's fixed and updated the link. I didn't know that extension.

So fast ! Thanks for your work.

firun · Post by **firun** » Sun Apr 23, 2006 4:45 pm

In second version I've noticed that it loads only one file from disc (at least on Metal Gear Ac!d UMD)... In first version everything was alright. But of course, as I noticed on other UMDs, the reading speed increased.

And I have a little question about another your program -- PSP Audio Recorder -- it seems that it can't execute Atrac3 Sample Player from Homebrew dir, but I tried only the first release of Atrac3 Player, maybe with the second one everything will be alright.

Thanks a lot for your work!

moonlight · Post by **moonlight** » Sun Apr 23, 2006 5:15 pm

firun wrote:In second version I've noticed that it loads only one file from disc (at least on Metal Gear Ac!d UMD)... In first version everything was alright. But of course, as I noticed on other UMDs, the reading speed increased.

This is because it applies a extension filter to increase the search speed. Probably those files of that umd have another extension different to at3, wav, pbp, and toc. If you tell me the extension i'll add it quickly.

firun wrote: And I have a little question about another your program -- PSP Audio Recorder -- it seems that it can't execute Atrac3 Sample Player from Homebrew dir, but I tried only the first release of Atrac3 Player, maybe with the second one everything will be alright.

It's strange because I remember to have succeeded using psp audio recorder with the first atrac3 player sample (i also haven't tried the second version)

firun · Post by **firun** » Sun Apr 23, 2006 5:34 pm

moonlight wrote: This is because it applies a extension filter to increase the search speed. Probably those files of that umd have another extension different to at3, wav, pbp, and toc. If you tell me the extension i'll add it quickly.

I din't read the source of the second release yet ^^
The extension is -- a3p.

moonlight wrote: It's strange because I remember to have succeeded using psp audio recorder with the first atrac3 player sample (i also haven't tried the second version)

I'll try the second release, but with the first sample Atrac3 Player I had only nonresponding PSP (PSP Recorder brilliantly works with UMD, but I couldn't make it work with Atrac3 Player). Maybe I've done something wrong -- I've put the Atrac3 Player Sample in PSP\GAME\HOMEBREW. I've put the EBOOT.PBP which was made from 2 (the loader & the executable).

moonlight · Post by **moonlight** » Sun Apr 23, 2006 5:46 pm

Updated the link with support for that curious extension.

I haven't tried again with the first atrac3 sample, but the second works well with the psp audio recorder.

firun · Post by **firun** » Sun Apr 23, 2006 5:53 pm

Thanks a lot!

-------------------------

Um, but I still can't execute Atrac3 Player from PSP Audio Recorder. After I press "o" it freezes and doesn't respond to any buttons' actions. If that's not a difficult for you, can you write here how to execute Atrac3 Player (second release) from PSP Audio Recorder. Thanks in advance!

__count · Post by **__count** » Mon Apr 24, 2006 4:55 pm

Just a FYI if anyone else is having problems with EAC (it goes into an infinite loop on my machine); here is a codec you can use to encode/decode AT3. It worked well for me with audiograbber.

forums.ps2dev.org

ATRAC3 Player Sample

ATRAC3 Player Sample

Re: ATRAC3 Player Sample

Re: ATRAC3 Player Sample

Problem loading a3p files from UMD

Re: Problem loading a3p files from UMD