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  #1  
Old 04-18-2004, 01:26
raladin
 
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Is it possbile to play a file from the memory without caching it on the HDD?

Hi all

I want to know something :

Is it possible to run and play a file from the memory without storing the file on the HardDisk Drive?

I mean for example : a Video file (Encrypted) I want to send it to the memory and then Decrypt it there.. and then the decrypted file will be placed on the memory without caching it on the HDD and will be played from there also without caching it..

So is it possible to play the file from the memory?

I know it is possible.. but can anybody give me some examples using any language like : Visual Basic.. C++.. ASM...

I prefer VB..

Please it is very important to do that..

Cheers..
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  #2  
Old 04-18-2004, 03:34
raladin
 
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Hey.. where are you guys!!!

I think it is a forum for experts!, isn't it?

I'm sure there is a solution here..

Hope that..

Waiting your replies..

Regards
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  #3  
Old 04-18-2004, 11:28
nine
 
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Playing contents from memory? It's just too ordinary thing.
Now just for fun look at this: hxxp://theprodukkt.com/
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  #4  
Old 04-18-2004, 17:22
raladin
 
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Thanks for your reply..

But how to do that?

I mean you said it is so easy.. but how?

Can I make that in VB?

Please help me with that..
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  #5  
Old 04-18-2004, 22:56
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K3nny K3nny is offline
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I like this 64k intro

http://www.scene.org/file.php?file=/demos/groups/farb-rausch/fr08_final.zip&fileinfo

VB is crap - use w32asm or C.
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  #6  
Old 04-18-2004, 23:05
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K3nny K3nny is offline
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This is the sample with source coded in C & asm
really impressive!
Attached Files
File Type: zip sample.zip (342.4 KB, 42 views)
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Last edited by K3nny; 04-18-2004 at 23:46.
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  #7  
Old 04-18-2004, 23:41
raladin
 
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Wow. just what I'm trying to find..

Thanks very much for your appreciated help..

But can this be for .PDF file also?

And does this sample decrypts the movie in the memory? Are there any stored files on the Hard Disk?

And where is the good way to learn how to program and modify this project? (Is it C++)?

Cheers..
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  #8  
Old 04-21-2004, 20:38
eugene_i
 
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Cool! There were a number of things like this for DOS.
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  #9  
Old 04-21-2004, 23:07
zEr0 zEr0 is offline
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hmmm K3nny post you some examples,

and reply to your answer

you can anything put into memory and than do it what you want - crypt, decrypt or anything else

and it's can be anything what you want
video, document, music, pictures ...... (it's only numbers in memory)

but maybe some problem you can meet, video file is huge file of bytes so you will read it sequencially to memory after packets and decrypt it and send it to some media dll or ActiveX or driver or ...... hmmmm

i have the same idea to my private project, but i will have only MP3 or OGG files, so i can load it whole to memory

(256Kb will be enough for all) said some unknown person from some unknown firm
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  #10  
Old 04-21-2004, 23:24
fsheron
 
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Provide an IStream interface and work with WMP?
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  #11  
Old 04-22-2004, 01:49
kesipyc
 
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Lightbulb Don't forget about swap file...

There is one more thing not to be forgotten though it's more important in real secure systems - swap file. Not saving data to file doesn't mean they won't be saved by operating system. Memory pages must be set as not swappable and it wasn't working well in windows 98, maybe it is on XP... Antoher solution is to encrypt swap file (easily done in Linux, not sure about windows) or to disable swapping (often not recommended).

Real, secure application will also wipe data from memory when they are no longer needed (by writing there many times some random garbage bytes)...
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