mdPanic(3dm)mdPanic(3dm)NAMEmdPanic - flush MIDI output and transmit (obsolete)
SYNOPSIS
#include <dmedia/midi.h>
int mdPanic(MDport port)
DESCRIPTIONmdPanic is an obsolete routine which sends ALL NOTES OFF and RESET ALL
CONTROLLERS messages on all channels.
The following program illustrates the prefered method of silencing stuck
notes (the code is also available in
/usr/share/src/dmedia/midi/simple/panic.c if the MIDI example code is
installed).
#include <stdio.h>
#include <dmedia/midi.h>
long long stamp = 0;
char *usage = "Usage: panic [-f] [-a | interface name]"
/*
* Transmit ALL NOTES OFF, ALL SOUND OFF, and RESET ALL CONTROLLERS
* messages on all 16 channels.
*/
void
send_control_messages(MDport port)
{
int channel, byte;
MDevent ev;
char data_byte[] = { MD_RESETALLCONTROLLERS, MD_ALLNOTESOFF,
MD_ALLSOUNDOFF };
for (channel = 0; channel < 16; channel++) {
for (byte = 0; byte < 3; byte++) {
ev.stamp = stamp++;
ev.msg[0] = MD_CONTROLCHANGE | channel;
ev.msg[1] = data_byte[byte];
ev.msg[2] = 0;
mdSend(port, &ev, 1);
}
}
}
/*
* Transmit explicit NOTE OFF events on all channels.
*/
void
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mdPanic(3dm)mdPanic(3dm)
send_note_off_events(MDport port)
{
int channel, note;
MDevent ev;
for (channel = 0; channel < 16; channel++) {
for (note = 0; note < 128; note++) {
ev.stamp = stamp++;
ev.msg[0] = MD_NOTEOFF;
ev.msg[1] = note;
ev.msg[2] = 0;
mdSend(port, &ev, 1);
}
}
}
void
main(int argc, char **argv)
{
int num_interfaces;
MDport port;
/* First initialize the MIDI library */
num_interfaces = mdInit();
if (num_interfaces == 0) {
fprintf(stderr, "panic: no interfaces configured0);
exit(1);
}
/* Open the port */
outport = mdOpenOutPort(name);
if (outport == NULL) {
fprintf(stderr, "panic: Could not open interface0);
exit(1);
}
/* Transmit 1 event every millisecond */
mdSetStampMode(outport, MD_RELATIVETICKS);
mdSetDivision(outport, 1);
mdSetTempo(outport, 1000);
send_note_off_events(outport);
send_control_messages(outport);
/* Wait for messages to go out */
while (mdTellNow(outport) < stamp) ;
}
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