/* A program to read commands from an infrared remote control, */ /* convert the IR commands to X key events and send the events */ /* to a specified X application. */ /* compile using: */ /* gcc -I/usr/include/X11 -L/usr/X11R6/lib -lX11 -o xirrc xirrc.c */ /* */ /* Sample invocation: */ /* ./xirrc /dev/ttyS1 */ /* */ /* Part of this program is based on GTKeyboard so this software */ /* falls under the GPL. See http://opop.nols.com/gtkeyboard.html */ #define XK_LATIN1 #define XK_MISCELLANY #include #include #include #include #include #include #include #include #include #include #include #include /****************** Global Routine Definitions *****************/ int ir_x_init(int argc, char *argv[]); /* set up X display */ int ir_open(char *); /* open serial port to IR reciever */ Window Select_Window(Display *); /* Select the IR kbd window */ /****************** Global Variables for X *********************/ Display *display; XKeyEvent xev; /***************** How this program works ****************** Open the serial port to the IR receiver Initialize the X display Select the window to receive the characters Select loop { Get characters from the IR receiver Convert character to X keycode Send Key to the X client } ***********************************************************/ main (int argc, char *argv[]) { fd_set rfds; /* bit masks for select statement */ int irfd; /* File Descriptor to IR serial port */ char ir_cmd; /* character from IR remote */ /* Open the serial port to the infrared receiver */ irfd = ir_open(argv[1]); /* Initialize the X display */ display = XOpenDisplay(NULL); if (display == NULL) { fprintf(stderr, "Unable to open X display\n"); exit(1); } /* Select the X app to receive the keycodes */ printf("Please select the X app to receive the IR keycodes\n"); xev.window = Select_Window(display); /* Loop getting IR codes from the receiver and sending them to the X app */ while (1) { FD_ZERO(&rfds); FD_SET(irfd, &rfds); (void) select(irfd+1, &rfds, (fd_set *)NULL, (fd_set *)NULL, (struct timeval *) NULL); if (FD_ISSET(irfd, &rfds)) { /* Get IR command byte */ read(irfd, &ir_cmd, 1); /* Convert IR command byte to a keycode */ switch (ir_cmd) { case 0x14: /* Mute: xmms key is 'c' (pause) */ xev.keycode= XKeysymToKeycode(display, XK_c); break; case 0x2e: /* Power: xmms key is 'x' (play) */ xev.keycode= XKeysymToKeycode(display, XK_x); break; case 0x05: /* Sleep: xmms key is 'v' (stop) */ xev.keycode= XKeysymToKeycode(display, XK_v); break; case 0x12: /* +Volume: xmms key is Cursor Up */ xev.keycode= XKeysymToKeycode(display, XK_Up); break; case 0x13: /* -Volume: xmms key is Cursor down */ xev.keycode= XKeysymToKeycode(display, XK_Down); break; case 0x10: /* +Channel: xmms key is 'b' (next song) */ xev.keycode= XKeysymToKeycode(display, XK_b); break; case 0x11: /* -Channel: xmms key is 'z' (prev song) */ xev.keycode= XKeysymToKeycode(display, XK_z); break; case 0x7f: /* Sony EOF byte. Ignored */ continue; break; default: printf("Unknown IR code: 0x%02x. Ignored\n", ir_cmd); continue; break; } /* Send keycode to the X app */ xev.serial = 0; xev.send_event = 0; xev.type = KeyPress; xev.display = display; xev.root = None; xev.subwindow = None; xev.time = 0; xev.same_screen = 1; xev.state = 0; xev.x = 1; xev.y = 1; xev.x_root = 1; xev.y_root = 1; (void) XSendEvent(display, xev.window, True, KeyPressMask, (XEvent *)&xev); XFlush(display); /* Key release may be needed for some programs */ xev.type = KeyRelease; (void) XSendEvent(display, xev.window, True, KeyReleaseMask, (XEvent *)&xev); XFlush(display); } } } /* ir_open: Open the serial port specified */ /* returns: The opened file descriptor */ int ir_open(char *serport) { struct termios tbuf; int fd_dev; if (( fd_dev = open(serport, (O_RDWR | O_NDELAY), 0)) < 0 ) { fprintf(stderr,"Unable to open tty port specified\n"); exit(1); } tbuf.c_cflag = CS7|CREAD|B9600|CLOCAL; tbuf.c_iflag = IGNBRK; tbuf.c_oflag = 0; tbuf.c_lflag = 0; tbuf.c_cc[VMIN] = 1; /* character-by-character input */ tbuf.c_cc[VTIME]= 0; /* no delay waiting for characters */ if (tcsetattr(fd_dev, TCSANOW, &tbuf) < 0) { fprintf(stderr, "xirrc: Unable to set device '%s' parameters\n", serport); exit(1); } if (( fd_dev = open(serport, (O_RDWR), 0)) < 0 ) { fprintf(stderr, "Unable to open tty port specified\n"); exit(1); } return(fd_dev); /* return the serial port file descriptor */ } /* * Routine to let user select a window using the mouse * This routine is taken from GTKeyboard. */ Window Select_Window(Display *dpy) { int status; Cursor cursor; XEvent event; Window target_win = None; Window root = DefaultRootWindow(display); int buttons = 0; /* Make the target cursor */ cursor = XCreateFontCursor(dpy, XC_crosshair); /* Grab the pointer using target cursor, letting it room all over */ status = XGrabPointer(dpy, root, False, (ButtonPressMask | ButtonReleaseMask), GrabModeSync, GrabModeAsync, root, cursor, CurrentTime); if (status != GrabSuccess) { printf("Can't grab mouse!\n"); } /* End if */ /* Let the user select a window... */ while ((target_win == None) || (buttons != 0)) { /* allow one more event */ XAllowEvents(dpy, SyncPointer, CurrentTime); XWindowEvent(dpy, root, (ButtonPressMask|ButtonReleaseMask), &event); switch (event.type) { case ButtonPress: if (target_win == None) { target_win = event.xbutton.subwindow; /* get window */ if (target_win == None) target_win = root; } /* End if */ buttons++; break; case ButtonRelease: if (buttons > 0) /* may have started with keys down */ buttons--; break; } /* End switch */ } /* End while */ XUngrabPointer(dpy, CurrentTime); /* Done with pointer */ XFlush(dpy); /* restore cursor */ return(target_win); } /* End Select_Window */