That's right, I'm keeping with tradition of names by using Tru, but I'm also breaking the mold by making a 6 letter app name.

I think this video should sum it up.



Basically, I started this a while ago, but then USB called me and I stopped working on it. However, seeing Sircmpwn playing music from his flash drive energized me to finish this. From the classical estimates, this should be impossible, grayscale takes 50% of the processor while sound takes 90%, so how did I do it? Triple threading!!! I am actually doing 3 different things at once on this program. I am playing sound, updating grayscale, and copying new video data, all at once.

I think one of the humorous parts of this is the insane data rate. The video runs at 10 fps, 10 * 768 * 2 = 15,360 Bytes/s. The sound runs between 17,500 Bytes/s and 20,000 Bytes/s. So that's a total of 34KB/s. That means it burns through Mirage in .5 sec! At this rate, the 84+SE can hold about 45 seconds and the 84+BE can hold around 15. But hey, this is full video on the calculator.

I'm also trying to make the conversion process user friendly this time. I'm terrible at directshow and such, but so far, I have the inputs to my program as <soundfile.wav> <videoFile.wmv> where the sound is a .wav and the video file is a .wmv at 192x128 and 30 fps, which is relatively easy to do. I wanted to let you input 1 file and your cpu speed, but I couldn't even resize the BMP's for the video through Windows's routines, I had to do it by hand


From an asm standpoint, this program is insane. First off, you take a grayscale video program. I am displaying a grayscale buffer at 60Hz and copying in new data at 10Hz. That's nothing special, but then I overlay sound interrupts running at 40Khz over top of that. These interrupts lower my base cpu speed to 500KHz, which is just enough time to copy in a new picture Better yet, for the first time, I'm using all 3 crystal timers, 2 of which are producing nested interrupts.

And you know, since it's me, perfect grayscale. It's not adjustable yet, but it will be.

In my current setup, I have video and audio looping independently, in the numa numa, assuming you are using the right processor speed, the video and sound are supposed to be the same length, however, the sound ends up being slightly longer since you can't interrupt instructions (which also causes the white noise.) But, I might be able to adjust for that. I could make them loop together, but I'm setting up for Nyan Cat

Here's the source and some samples of this video. I included samples clocked for 15Mhz (wabbit), 15.65Mhz, and 16.3Mhz (mine). So use them if you want. I just have two warnings, 1) I don't think these apps will validate on the calculator, I used a workaround, but it does take a 1/2 hour to send, 2) these sound dreadful in wabbitemu, there's not much that can be done about that.

So have fun. (If you can't figure out how to run it and crash your calculator, I lol at you)

Edit:
    New download link

Well yeah that would be awesome if ran from a flash drive.

Also this deserve front page news.

...
Why? ? ? Why? ? ?
...Seriously, this is epic stuff. Can you make a rickroll version of this, for added awesomeness?

thepenguin77=awesome

I remember hearing you talk about this on IRC. This is simply fantastic. I love how you are constantly pushing the bounds of what was thought to be possible. Also, please take some time to clean up your work desk, that thing is freakin messy!

The epicness factor of this...

Wow...  That is EPIC!  now for the Nspires... 

I think I like the one with the relative threshold and dithering the best. I gives the best color balance (it isn't too dark) and the dithering makes the detail look a bit clearer.