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image file format   Message List  
Reply | Forward Message #562 of 15019 |
Re: [gbadev] image file format

On Tue, 3 Oct 2000, Dennis Ranke wrote:

> Hm, since this is a gba mailing list, i assume you are talking about
> the gameboy advance which shouldn't have much of a problem decoding
> jpegs.

Oops. I had a serious eye-brain-disconnection, and thought the mail was
from the gb-dev list. Of course the GBA can use JPEGs! Sorry everyone, my
bad.

-a




Tue Oct 3, 2000 1:12 pm

ammonton@...
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Message #562 of 15019 |
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Hi, I remember reading an e-mail about image compression on the gba. I will share the alternatives I found regarding image compression. I just discovered the...
Vince VE
vince_0x0f@...
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Oct 2, 2000
10:26 pm

On Mon, 2 Oct 2000, Vince VE wrote: <snip> ... Well, if you're looking for a technical challenge, at http://www.ffd2.com/fridge/chacking/c=hacking19.txt you'll...
Anders M Montonen
ammonton@...
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Oct 3, 2000
12:07 pm

In message <Pine.OSF.4.20.0010031456570.2147-100000@...> ... Hm, since this is a gba mailing list, i assume you are talking about the gameboy...
Dennis Ranke
exoticorn@...
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Oct 3, 2000
1:02 pm

... Oops. I had a serious eye-brain-disconnection, and thought the mail was from the gb-dev list. Of course the GBA can use JPEGs! Sorry everyone, my bad. -a...
Anders M Montonen
ammonton@...
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Oct 3, 2000
1:12 pm

... Go for the AAN DCT.. Using that I'm currently at 0.31 MegaPixels per second (about 8fps) using 8:1 compressed images. That's still in a complete C++ ...
Andy Mucho
andy@...
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Oct 3, 2000
1:31 pm

In message <EHEOLOLLINEMBNHDJDFLOEDDHEAA.andy@...> ... Yes, that's what i will try to implement today. Thanks to you i now also have some...
Dennis Ranke
exoticorn@...
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Oct 3, 2000
1:49 pm

In message <EHEOLOLLINEMBNHDJDFLOEDDHEAA.andy@...> ... Hmm, I have now implemented AAN DCT and my decoder now takes on a 233Mhz StrongARM...
Dennis Ranke
exoticorn@...
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Oct 3, 2000
8:44 pm

... Nope, I meant the entire kaboodle. Though my file format is not a true JPEG compliant stream, I still feature all the essentials, but no dithering. I keep...
Andy Mucho
andy@...
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Oct 3, 2000
10:11 pm

In message <EHEOLOLLINEMBNHDJDFLEEFKHEAA.andy@...> ... Hm, that's impressive. That means that i have still some things to do... ... Hm, in...
Dennis Ranke
exoticorn@...
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Oct 4, 2000
3:45 pm

... why 'impractical for real use' ? more like 'the most decent image compression out there' ... (yes, it works like a charm on c64 ;=P) -- ... /^\ \ / ASCII...
Groepaz
groepaz@...
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Oct 3, 2000
12:11 pm

Anyone know the MIPS usage of an MP audio stream? I downloaded a DOS compressor/decompressor and it was a total beast of a program. That psycho-acoustic model...
Sean Dunlevy
sean@...
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Oct 3, 2000
1:36 pm

... Expect on the ARM7 architecture a full 48K 128Kbps Layer3 stream to require close to 30MHZ.. Obviously pretty useless for the GBA's underpowered CPU.. So...
Andy Mucho
andy@...
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Oct 3, 2000
2:15 pm

Useful to know. So, it should be possible to squeeze a low-rate stream out of the thing. I suppose 32KHz is fine considering the DAC & op-amp isn't likely to ...
Sean Dunlevy
sean@...
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Oct 3, 2000
2:20 pm

Why use any alternatives to the compression built into the hardware? I would think those would be the fastest to decompress. Doesn't the hardware support...
Joshua Meeds
dreamer@...
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Oct 4, 2000
12:15 am

Hi, No you are quite correct. In fact I store my images using LZ77 compression but no Huffman so that you can decompress straight into VRAM. If you use ...
Matthew Davies
MDavies@...
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Oct 4, 2000
9:41 am
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