I am no programmer, I took a C class in undergrad and that is it.
I learned how to compile from the A320 forum and Google.
***This is not a formal release I am seeking development help***
I cross compiled "gngb" a Game Boy/ Game Boy Color Emulator. I use this dmenu entry:
Icon = "res/emulators/gnuboy.png"
Name = " Gngb"
Executable = "./gngb"
WorkDir = "/usr/local/emulators/gngb"
Selector = yes
L: brings up the Menu
Start: enter menus, toggle or select menu items
R: exit menus, Exit gngb
Load/Save State: can choose 8 different slots, has little thumbnail for saves
Video: can toggle Color Filter and enter the Filter sub-menu,
Filter Sub-menu: Select Filter 2 for 150% scaling (my temp default), none for native game boy resolution
Frameskip: Toggle frameskip, show fps meter
Sound: Toggle sound on/off (temp defaults off because of poor performance with sound on)
Reset: Resets Gameboy
Gngb can open/run zipped (.zip) roms.
It has audio problems though. With gngb the sound is choppy.
Press L to open menu, scroll down to Sound, and press start to turn on sound (it is currently off by default.)
Gngb uses AUDIO_S8 format which I only changed the name to AUDIO_S16 in sound.c, line 933.
Does this require some additional conversion?
Lowering the sample rate helped a bit but the sound is still choppy.
I have included the complete source code for suggestions/help/explanations.
Things I have done:
I changed the default conf.sample_rate=44100; to conf.sample_rate=16000; and remapped the default keys to match the Dingoo in emu.c.
The makefile is setup to use booboo’s 20090916 toolchain with the /opt/mipsel-linux-uclibc/usr prefix.
I temporarily repurposed the filter blit_std_with_scanline50 function in video_std.c to use the SDL_StretchSurface_23 function which gives 150% scale.
I am learning as I go and I will eventually put my own filter entry in. This is my first attempt.
How can the sound be fixed/improved?
If you configure with:
./configure --host=mipsel-linux --target=mipsel-linux --with-sdl-prefix=/opt/mipsel-linux-uclibc/usr --enable-static
to the LIBS = line in the Makefile
To the CFLAGS = line in the Makefile
Use the Makefile in the gngb/src folder.
A Dingux executable gngb is already in the src folder if you want to try it out.
Get the complete source here:
Edited by gp2xs, 24 September 2009 - 09:11 PM.