Homebrew mGBA official standalone Wii port

the_randomizer · Aug 31, 2015

zerofalcon said:
Exactly, it's related to the audio buffer samples and I guess lowering the sample rate helps a little bit. Idle loops optimizations should work if configuring correctly but I dont know exactly what values are needed to change this. A funny thing I noticed (libretro core) with Final Fantasy IV Advance: if using a bios file (gba_bios.bin) the game becomes laggy in certain areas (intro after Square Enix and right after starting a new game), and here's the weird part, if using HLE bios (no gba_bios.bin file) the game simply runs faster, a little to none crackling and lagging. But for most games I tested running with a bios file they run almost perfect (98-100%). The sad part? 32 mb roms are not working in retroarch and I hope this gets fixed soon.

Edit: mGBA Wii standalone port now supports tilt sensor and in-progress gyroscope. This is getting better and better.

I know in Snes9x, changing the buffer size from 96 ms to 160 ms helps tremendously, esp when using the XAudio2 API on Windows 7, I don't know if the same applies to the standalone port to be honest. As for the the fact the RA port doesn't support large file sizes, I would hope the dev team is aware of the issue and will fix it soon. That being said, I find it weird the BIOS file makes the performance worse, I don't even think people really need to use it. For lowering the rates, I don't think 32 kHz would be bad, but keeping the buffer size to 160 ms maybe? Just a guess, I wish I could compile it in Windows and help test different values, sadly, there's no way to do so.

Edit; @zerofalcon will there be a new build to test? Mostly curious

justjack · Aug 31, 2015

Alpha 3 available

https://forums.mgba.io/showthread.php?tid=25

the_randomizer · Aug 31, 2015

justjack said:
Alpha 3 available

https://forums.mgba.io/showthread.php?tid=25

Nice, do we know if audio has been fixed/improved at all?

Curious as to what changes there are.

sindrik · Sep 1, 2015

justjack said:
Alpha 3 available

https://forums.mgba.io/showthread.php?tid=25

Aaaaaaand... testing.

Anyone can point as to where to see the changelog specific to the Wii version? I'm not entirely accustomed to GitHub as opposed to the old Google Code.

the_randomizer · Sep 1, 2015

sindrik said:
Aaaaaaand... testing.

Anyone can point as to where to see the changelog specific to the Wii version? I'm not entirely accustomed to GitHub as opposed to the old Google Code.

Agreed, no idea where the change log is for this.

VinsCool · Sep 1, 2015

sindrik said:
Aaaaaaand... testing.

Anyone can point as to where to see the changelog specific to the Wii version? I'm not entirely accustomed to GitHub as opposed to the old Google Code.

the_randomizer said:
Agreed, no idea where the change log is for this.

https://github.com/mgba-emu/mgba/commits/master

the_randomizer · Sep 1, 2015

VinsCool said:
https://github.com/mgba-emu/mgba/commits/master

Hmm, I was hoping to see audio buffer size changes in there (to reduce the crackling), but I don't see it

VinsCool · Sep 1, 2015

the_randomizer said:
Hmm, I was hoping to see audio buffer size changes in there (to reduce the crackling), but I don't see it

Maybe this?

https://github.com/mgba-emu/mgba/commit/c0d7cfbf0b99e4cf6e28a0a2b9727e5fc2a453ab

the_randomizer · Sep 1, 2015

VinsCool said:
Maybe this?

https://github.com/mgba-emu/mgba/commit/c0d7cfbf0b99e4cf6e28a0a2b9727e5fc2a453ab

No idea, it's all Greek to me lol. Maybe I'll ask Zerofalcon about it

zerofalcon · Sep 2, 2015

No improved audio on alpha 3, I made a new fork on github with latest changes decreasing the audio crackling. Note that the audio still has some quirks here and there, the problem was not completely solved, at least with the standalone version for Wii.

If someone wants to compile it from source:
https://github.com/retr0gam3r/mgba

Last build compiled for testing in the attached file.

the_randomizer · Sep 2, 2015

zerofalcon said:
No improved audio on alpha 3, I made a new fork on github with latest changes decreasing the audio crackling. Note that the audio still has some quirks here and there, the problem was not completely solved, at least with the standalone version for Wii.

If someone wants to compile it from source:
https://github.com/retr0gam3r/mgba

Last build compiled for testing in the attached file.

Hey, it's all good, man, I'm happy to see this emulator getting better and better, proving once and for all the Wii is more capable than anyone guessed

Eventually, the sound issue will be resolved, I have hope

ShadowOne333 · Sep 2, 2015

This is looking neat with every day that passes.
Mesa like this.

sindrik · Sep 2, 2015

Tested the latest official Alpha 3. Definitely an improvement in files/folder navigation, no oversensitivity with buttons when selecting a rom or scrolling through the list. You can now return to rom selection, and resumes in the same spot you loaded a game before. Games really do run great.

zerofalcon said:
No improved audio on alpha 3, I made a new fork on github with latest changes decreasing the audio crackling. Note that the audio still has some quirks here and there, the problem was not completely solved, at least with the standalone version for Wii.

If someone wants to compile it from source:
https://github.com/retr0gam3r/mgba

Last build compiled for testing in the attached file.

Thanks! I'll test it. Seems there was some fix applied to official one hour ago:

https://github.com/mgba-emu/mgba/commit/d16c5e3a74b9a30568f7299409f2949fd150fc42

VinsCool · Sep 2, 2015

sindrik said:
Tested the latest official Alpha 3. Definitely an improvement in files/folder navigation, no oversensitivity with buttons when selecting a rom or scrolling through the list. You can now return to rom selection, and resumes in the same spot you loaded a game before. Games really do run great.

Thanks! I'll test it. Seems there was some fix applied to official one hour ago:

https://github.com/mgba-emu/mgba/commit/d16c5e3a74b9a30568f7299409f2949fd150fc42

Definitely a fix! @the_randomizer

ShadowOne333 · Sep 2, 2015

VinsCool said:
Definitely a fix! @the_randomizer

Does it fix GB/GBC support or sound crackling?

VinsCool · Sep 2, 2015

ShadowOne333 said:
Does it fix GB/GBC support or sound crackling?

I thought mGBA is a gba amu only?

ShadowOne333 · Sep 2, 2015

VinsCool said:
I thought mGBA is a gba amu only?

First half is sarcasm, second half is the actual question.

the_randomizer · Sep 2, 2015

Now we just need to find a way to compile this audio fix on Windows, so far, there's only a guide for Linux, which i don't have

Edit:
@zerofalcon

Seems we have an audio fix

https://github.com/mgba-emu/mgba/commit/d16c5e3a74b9a30568f7299409f2949fd150fc42

zerofalcon · Sep 2, 2015

This is great! I compiled an hour ago the binary with latest changes and the crackling audio it's almost gone. But! still remains in some games... you can tell by playing metroid zero mission. On the contrary for Mother 3 is perfect, very little crackling and the timing is perfect for rhythm combos. Btw the libretro core works even better but not with the official audio fix. Now we need a solution for large gba roms not loading in retroarch.

the_randomizer · Sep 2, 2015

zerofalcon said:
This is great! I compiled an hour ago the binary with latest changes and the crackling audio it's almost gone. But! still remains in some games... you can tell by playing metroid zero mission. On the contrary for Mother 3 is perfect, very little crackling and the timing is perfect for rhythm combos. Btw the libretro core works even better but not with the official audio fix. Now we need a solution for large gba roms not loading in retroarch.

Awesome, glad to see it much better for the Wii (BTW, will there be a compiled version soon? Just wondering so I can help test as well), I wonder what can be done to further reduce the audio crackling, as I wish to test games like Golden Sun 1 and 2, Final Fantasy IV, V and VI, and so on

Edit: Just saw him post that she has no intention to make a Wii U port of this emulator, she reasons that the Wii U already has GBA games and therefore its official GBA emulation.

Homebrew mGBA official standalone Wii port

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