footware.c

////////////////////////////////////////////////////////////////////////
//
// footware  -  Version 0.1
// ---------
//
// see README.md for enlightenment ;o)
//
// Written by Sebastian Korten
// eMail: Sebastian.Korten at gmail.com
//
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#include <X11/extensions/XTest.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <stdio.h>
#include <sys/soundcard.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/select.h>


int main(void) {
    // Set-up the display to send the fake-key-events to...
    Display* pDisplay = XOpenDisplay( NULL );
    if( pDisplay == NULL ) return 1;

    unsigned char inpacket[4];
    unsigned char noteNumber;
    unsigned char result = 0;

    // first open the sequencer device for reading.
    int seqfd = open("/dev/sequencer", O_RDONLY);

    if (seqfd == -1) return 0;

    fd_set readfs;  /* file descriptor set */

    while (1) {
        FD_SET(seqfd, &readfs);

        select(seqfd+1, &readfs, NULL, NULL, NULL);

        if(FD_ISSET(seqfd, &readfs)) {
            read(seqfd, &inpacket, sizeof(inpacket));

            if (inpacket[0] == SEQ_MIDIPUTC) {
                if ((inpacket[1] & 0xf0) == 0x90) {
                    read(seqfd, &inpacket, sizeof(inpacket));
                    noteNumber = inpacket[1];
                    read(seqfd, &inpacket, sizeof(inpacket));
                    switch(noteNumber) {
                        case 35: result = XTestFakeKeyEvent( pDisplay, XKeysymToKeycode( pDisplay, XK_Escape), inpacket[1], CurrentTime );
                             break;
                        case 36: result = XTestFakeKeyEvent( pDisplay, XKeysymToKeycode( pDisplay, XK_Shift_L), inpacket[1], CurrentTime );
                             break;
                        case 38: result = XTestFakeKeyEvent( pDisplay, XKeysymToKeycode( pDisplay, XK_Control_L), inpacket[1], CurrentTime );
                             break;
                        case 40: result = XTestFakeKeyEvent( pDisplay, XKeysymToKeycode( pDisplay, XK_End), inpacket[1], CurrentTime );
                             break;
                        case 41: result = XTestFakeKeyEvent( pDisplay, XKeysymToKeycode( pDisplay, XK_Alt_L), inpacket[1], CurrentTime );
                             break;
                    }
                }
            }
            XFlush(pDisplay);
        }
    }
    XCloseDisplay(pDisplay);
    return 0;
}