Atrac3plus decoder!

[Vincentmrl]

Hey guys I did some googling today, and I found an atrac3plus decoder and also a site with a sample code for decoding

Atrac3plus decoder: http://forums.sonyinsider.com/topic/2399...ia-player/

libaudiocodec to decode Atrac3plus: http://forums.dashhacks.com/psp-programm...3plus.html

Some code sample: http://cooleyes.fx-world.org/blog/?p=3

I hope this helps!

[Henrik]

Yeah, this is not new. You need SonicStage, which we don't want to depend on and can't on non-Windows platforms like Android. The code sample there is for running on the real PSP, it cannot run anywhere else as it uses the hardware AT3+ decoder that is built-in to the PSP.

[Vincentmrl]

Nope, the first link is a decoder WITHOUT sonicstage, because it was taken from sony content transfer.

[Henrik]

Sony content transfer, sonicstage, it doesn't matter - it's still some closed source DLL which we can't legally distribute and will only work on Windows.

[Code101]

It would be nice to add some sort of extension to windows PPSSPP if it's possible.
If it's like legal issues then I can understand why you wont bother

[VIRGIN KLM]

It's not a legal problem, what that thing does is merely re-batching OMA files and decode them to wav on SonicStage. The problem is that it would be a bad substitute (Though for some reason I'd love something like that to get implemented on PPSSPP, since I use it on JPCSP to replace the audio files with real PCM audio from the official OST discs of games which gives a TREMENDOUS boost in audio quality)
BTW, It just flashed in my head that you can do the same in Android without the need to transfer the files manualy from PC.
This Locoroco game, Lemmings, Cubix and other PSP games like minis that were emulated natively on Android via the use of PlayStation Certified/Playstation Mobile apps MUST contain some sort of ATRAC3+ decoder since the PSP games are basically the untouched iso file wrapped in a PSC title. Oh and I HIIIIIGLY doubt they are using LLE emulation on Android devices for the Sound Emulation.

Remember this is NOT a port, it's simply an officialy emulated game:

[m45t3r]

(03-13-2013 08:45 AM)Vincentmrl Wrote:  Nope, the first link is a decoder WITHOUT sonicstage, because it was taken from sony content transfer.

What we can do is use this codec or any other Windows-only codec to decode the files to another format like PCM (actually it would be great to support something like Vorbis ou Opus since PCM occupy to much space) and make PPSSPP load them instead of Atrac3+. It is just a hack until we have a proper opensource Atrac3+ decoder (that may or may not happen since I don't know anyone that is working on it, and I do acompany some codec's hacker blogs), but I think it may work.

[VIRGIN KLM]

(03-14-2013 03:50 AM)m45t3r Wrote:  

(03-13-2013 08:45 AM)Vincentmrl Wrote:  Nope, the first link is a decoder WITHOUT sonicstage, because it was taken from sony content transfer.

What we can do is use this codec or any other Windows-only codec to decode the files to another format like PCM (actually it would be great to support something like Vorbis ou Opus since PCM occupy to much space) and make PPSSPP load them instead of Atrac3+. It is just a hack until we have a proper opensource Atrac3+ decoder (that may or may not happen since I don't know anyone that is working on it, and I do acompany some codec's hacker blogs), but I think it may work.

I said that over a month ago but as JPCSP's history proved it's a bad solution that will put PPSSPP in a bad loop of events.

[ravid1323]

it will help if this sonicstage will have open sources? or their third-party alternatives will have open source? or running sonicstage on wine will help... i know about Symphonic it's java open source for linux machine, and it's should be connected to sonicstage as third-party alternatives... i don't know

[GuilhermeGS2]

I found this, it help? http://forums.sonyinsider.com/topic/2067...en-source/

---

Oh, sorry. I see that it already was post by other user. Sorry.

[VIRGIN KLM]

Another post linking to the same link?
That's ATRAC3 not ATRAC3+
Read people!!! XD
I'm gonna decompile Locoroco for Xperia Play and see what's inside.

[vnctdj]

(04-30-2013 10:16 AM)VIRGIN KLM Wrote:  I'm gonna decompile Locoroco for Xperia Play and see what's inside.

Interesting

[VIRGIN KLM]

(04-30-2013 10:19 AM)vnctdj Wrote:  

(04-30-2013 10:16 AM)VIRGIN KLM Wrote:  I'm gonna decompile Locoroco for Xperia Play and see what's inside.

Interesting

Just did it.

lib/armeabi/libdefault.so - Is the PSP emulator, it's encrypted but you can obtain the unencrypted file from /dev/kmem on a rooted Android with a custom Kernel.

There's also a zpak file that has a file called "image.ps" which is the JAP ISO of Locoroco Midnight Carnival for PSP.

We could give a look to libdefault.so for anything useful

[JumperTwo]

(04-30-2013 10:41 AM)VIRGIN KLM Wrote:  

(04-30-2013 10:19 AM)vnctdj Wrote:  

(04-30-2013 10:16 AM)VIRGIN KLM Wrote:  I'm gonna decompile Locoroco for Xperia Play and see what's inside.

Interesting

Just did it.

lib/armeabi/libdefault.so - Is the PSP emulator, it's encrypted but you can obtain the unencrypted file from /dev/kmem on a rooted Android with a custom Kernel.

There's also a zpak file that has a file called "image.ps" which is the JAP ISO of Locoroco Midnight Carnival for PSP.

We could give a look to libdefault.so for anything useful

even if i don't fully understand how can you/we read a compiled binary that contains machine code (.so) i'm really curious to know what happens if you replace that image.ps with another game image,renaming it like that (see PSXperia) did you already tried?

[GuilhermeGS2]

(04-30-2013 07:08 PM)JumperTwo Wrote:  

(04-30-2013 10:41 AM)VIRGIN KLM Wrote:  

(04-30-2013 10:19 AM)vnctdj Wrote:  

(04-30-2013 10:16 AM)VIRGIN KLM Wrote:  I'm gonna decompile Locoroco for Xperia Play and see what's inside.

Interesting

Just did it.

lib/armeabi/libdefault.so - Is the PSP emulator, it's encrypted but you can obtain the unencrypted file from /dev/kmem on a rooted Android with a custom Kernel.

There's also a zpak file that has a file called "image.ps" which is the JAP ISO of Locoroco Midnight Carnival for PSP.

We could give a look to libdefault.so for anything useful

even if i don't fully understand how can you/we read a compiled binary that contains machine code (.so) i'm really curious to know what happens if you replace that image.ps with another game image,renaming it like that (see PSXperia) did you already tried?

I think can be possible.