jazzy scuba adventure by Fit

jazzy scuba adventure by Fit [web]

screenshot added by yzi on 2018-08-05 00:30:56

platform :	Windows Windows
type :	1k 1k
release date :	august 2018
release party :	Assembly 2018
compo :	combined 1k
ranked :	9th

popularity : 51%

51%

0.83

alltime top: #22694

yzi [Code, music]

added on the 2018-08-05 00:30:56 by yzi

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The audio is pretty damn good for a 1k,so that kinda explains the visuals.

rulez added on the 2018-08-05 02:22:00 by Trilkk

neat

rulez added on the 2018-08-05 08:55:39 by wbcbz7

Trilkk: hey the visuals are by far the best I've ever done in a 1k! ;) But they were really only an afterthought, and it's better to have at least some visuals. The music routine isn't optimized, it was merely a quickly made experiment. I usually make the music routines in C first and then if it looks like it's going to end up in a prod, I'll rewrite it by hand in assembly and spend dozens of hours optimizing it for Crinkler. But this time I didn't to that, I just left it as a C routine and squeezed some visuals into the remaining bytes.

Here's the music routine in all its weird unoptimized glory, with an example main program and everything.

Code:


#include <windows.h>

unsigned int framecount = 0;
HMIDIOUT midiout_handle;


// Call this at around 60 times per second
void addTune()
{
    // Chord/bass+melody sequence, as indices into the scale[] array
    static unsigned int sequence[] = { 0, 5, 6, 2, 1, 3, 4, 7 };
    // Two octaves of Barry Harris's "6th Diminished" scale
    static unsigned int scale[16] = { 0, 2, 4, 5, 7, 8, 9, 11, 12+0, 12+2, 12+4, 12+5, 12+7, 12+8, 12+9, 12+11, };

    // MIDI status bytes
    // 0x0000xxCy : Program Change (xx) on channel y
    // 0x00vvnn9y : Note On, channel y, note nn, velocity vv
    // 0x00007BBy : All Notes Off, channel y
    // 0x00vvnnBy : Control Change (xx) on channel y, controller nn, value vv    

    if (framecount & 3) return;

    unsigned int chan=8, seqnote=0, note=24, vel=127;

    if ((framecount >= 1024))
    {
        if (framecount >= (1024+2048+33)) framecount -= ((framecount >> 5) << 5);

        if ((framecount & 63) == 32)
        { chan = 15; note += (framecount >> 10) * 12 + 24; }

        if ((framecount & 31) == 0)
            goto ohi;
    }

    chan = (framecount >> 2) & 7;
    note += 24;
    vel = 60;

ohi:
    unsigned int seqstep = framecount >> 7;

    seqnote = sequence[seqstep & 7];
    note += scale[((((framecount >> 2) & 7) << 1) + seqnote) & 15];
    
    midiOutShortMsg(midiout_handle, 0x00007BB0 + chan); // all notes off
    if (chan < 15) midiOutShortMsg(midiout_handle, 0x00005Fc0 + chan); // patch change
    else           midiOutShortMsg(midiout_handle, 0x000058c0 + chan); // patch change
    midiOutShortMsg(midiout_handle, 0x00000090 + chan + (note << 8) + (vel << 16)); // note on 
    midiOutShortMsg(midiout_handle, 0x000000B0 + chan + (10 << 8) + ((framecount * 17 & 127) << 16)); // panning
}


void main()
{
    midiOutOpen(&midiout_handle,0,0,0,CALLBACK_NULL);

loop:
    ShowCursor(0);
    PeekMessage(0, 0, 0, 0, PM_REMOVE);
    addTune(); 
    framecount++;
    Sleep(15); 
    if(!GetAsyncKeyState(VK_ESCAPE)) 
        goto loop;

    ExitProcess(0);
}

added on the 2018-08-05 21:08:00 by yzi

Worm! Love the harmony, and thanks for the music generator source!

rulez added on the 2018-08-06 22:15:57 by noby