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|
//=========================================================
// MusE
// Linux Music Editor
// $Id: sync.cpp,v 1.1.1.1 2003/10/29 10:05:10 wschweer Exp $
//
// (C) Copyright 2003 Werner Schweer (ws@seh.de)
//=========================================================
#include <cmath>
#include "midithread.h"
#include "sync.h"
#include "song.h"
#include "utils.h"
#include "midiport.h"
#include "mididev.h"
#include "globals.h"
int rxSyncPort = -1; // receive from all ports
int txSyncPort = 1;
int rxDeviceId = 0x7f; // any device
int txDeviceId = 0x7f; // any device
bool debugSync = false;
int mtcType = 1;
MTC mtcOffset;
BValue extSyncFlag(0, "extSync"); // false - MASTER, true - SLAVE
bool genMTCSync = false; // output MTC Sync
bool genMCSync = false; // output MidiClock Sync
bool genMMC = false; // output Midi Machine Control
bool acceptMTC = false;
bool acceptMC = true;
bool acceptMMC = true;
static MTC mtcCurTime;
static int mtcState; // 0-7 next expected quarter message
static bool mtcValid;
static int mtcLost;
static bool mtcSync; // receive complete mtc frame?
static bool mcStart = false;
static int mcStartTick;
//---------------------------------------------------------
// mmcInput
// Midi Machine Control Input received
//---------------------------------------------------------
void MidiThread::mmcInput(const unsigned char* p, int n)
{
if (debugSync)
printf("mmcInput: n:%d %02x %02x %02x %02x\n",
n, p[2], p[3], p[4], p[5]);
if (!(extSyncFlag.value() && acceptMMC))
return;
switch(p[3]) {
case 1:
if (debugSync)
printf(" MMC: STOP\n");
if ((state == PLAY || state == PRECOUNT))
stopPlay();
break;
case 2:
if (debugSync)
printf(" MMC: PLAY\n");
case 3:
if (debugSync)
printf(" MMC: DEFERRED PLAY\n");
mtcState = 0;
mtcValid = false;
mtcLost = 0;
mtcSync = false;
startPlay(song->cpos());
break;
case 4:
printf("MMC: FF not implemented\n");
break;
case 5:
printf("MMC: REWIND not implemented\n");
break;
case 6:
printf("MMC: REC STROBE not implemented\n");
break;
case 7:
printf("MMC: REC EXIT not implemented\n");
break;
case 0xd:
printf("MMC: RESET not implemented\n");
break;
case 0x44:
if (p[5] == 0) {
printf("MMC: LOCATE IF not implemented\n");
break;
}
else if (p[5] == 1) {
MTC mtc(p[6] & 0x1f, p[7], p[8], p[9], p[10]);
int mmcPos = tempomap.time2tick(mtc.time());
seek(mmcPos);
if (debugSync) {
printf("MMC: %f %d seek ",
mtc.time(), mmcPos);
mtc.print();
printf("\n");
}
write(sigFd, "G", 1);
break;
}
// fall through
default:
printf("MMC %x %x, unknown\n", p[3], p[4]); break;
}
}
//---------------------------------------------------------
// mtcInputQuarter
// process Quarter Frame Message
//---------------------------------------------------------
void MidiThread::mtcInputQuarter(int, unsigned char c)
{
static int hour, min, sec, frame;
if (!extSyncFlag.value())
return;
int valL = c & 0xf;
int valH = valL << 4;
int _state = (c & 0x70) >> 4;
if (mtcState != _state)
mtcLost += _state - mtcState;
mtcState = _state + 1;
switch(_state) {
case 7:
hour = (hour & 0x0f) | valH;
break;
case 6:
hour = (hour & 0xf0) | valL;
break;
case 5:
min = (min & 0x0f) | valH;
break;
case 4:
min = (min & 0xf0) | valL;
break;
case 3:
sec = (sec & 0x0f) | valH;
break;
case 2:
sec = (sec & 0xf0) | valL;
break;
case 1:
frame = (frame & 0x0f) | valH;
break;
case 0: frame = (frame & 0xf0) | valL;
break;
}
frame &= 0x1f; // 0-29
sec &= 0x3f; // 0-59
min &= 0x3f; // 0-59
hour &= 0x1f;
if (mtcState == 8) {
mtcValid = (mtcLost == 0);
mtcState = 0;
mtcLost = 0;
if (mtcValid) {
mtcCurTime.set(hour, min, sec, frame);
mtcSyncMsg(mtcCurTime, !mtcSync);
mtcSync = true;
}
}
else if (mtcValid && (mtcLost == 0)) {
mtcCurTime.incQuarter();
mtcSyncMsg(mtcCurTime, false);
}
}
//---------------------------------------------------------
// mtcInputFull
// process Frame Message
//---------------------------------------------------------
void MidiThread::mtcInputFull(const unsigned char* p, int n)
{
if (debugSync)
printf("mtcInputFull\n");
if (!extSyncFlag.value())
return;
if (p[3] != 1) {
if (p[3] != 2) { // silently ignore user bits
printf("unknown mtc msg subtype 0x%02x\n", p[3]);
dump(p, n);
}
return;
}
int hour = p[4];
int min = p[5];
int sec = p[6];
int frame = p[7];
frame &= 0x1f; // 0-29
sec &= 0x3f; // 0-59
min &= 0x3f; // 0-59
// int type = (hour >> 5) & 3;
hour &= 0x1f;
mtcCurTime.set(hour, min, sec, frame);
mtcState = 0;
mtcValid = true;
mtcLost = 0;
}
//---------------------------------------------------------
// nonRealtimeSystemSysex
//---------------------------------------------------------
void MidiThread::nonRealtimeSystemSysex(const unsigned char* p, int n)
{
// int chan = p[2];
switch(p[3]) {
case 4:
printf("NRT Setup\n");
break;
default:
printf("unknown NRT Msg 0x%02x\n", p[3]);
dump(p, n);
break;
}
}
//---------------------------------------------------------
// setSongPosition
// MidiBeat is a 14 Bit value. Each MidiBeat spans
// 6 MIDI Clocks. Inother words, each MIDI Beat is a
// 16th note (since there are 24 MIDI Clocks in a
// quarter note).
//---------------------------------------------------------
void MidiThread::setSongPosition(int port, int midiBeat)
{
if (midiInputTrace)
printf("set song position port:%d %d\n", port, midiBeat);
if (!extSyncFlag.value())
return;
playTickPos = midiClick = (division * midiBeat) / 4;
if (debugSync)
printf("setSongPosition %d\n", playTickPos);
write(sigFd, "G", 1);
}
//---------------------------------------------------------
// realtimeSystemInput
// real time message received
//---------------------------------------------------------
void MidiThread::realtimeSystemInput(int port, int c)
{
if (midiInputTrace)
printf("realtimeSystemInput port:%d 0x%x\n", port+1, c);
if (midiInputTrace && (rxSyncPort != port) && rxSyncPort != -1) {
if (debugSync)
printf("rxSyncPort configured as %d; received sync from port %d\n",
rxSyncPort, port);
return;
}
if (!extSyncFlag.value())
return;
switch(c) {
case 0xf8: // midi clock (24 ticks / quarter note)
{
double mclock0 = curTime();
processMidiClock();
if (state == PLAY) {
recTick += division / 24;
int diff = recTick - _midiTick;
int tempo = tempomap.tempo(0);
tempo -= diff*5;
tempomap.setTempo(0, tempo);
_midiTick = recTick; // brutal
break;
}
double tdiff0 = mclock0 - mclock1;
double tdiff1 = mclock1 - mclock2;
if (mclock1 == 0.0)
midiPorts[port].device()->discardInput();
if ((mclock2 != 0.0) && (tdiff0 > 0.0)) {
int tempo0 = int(24000000.0 * tdiff0 + .5);
int tempo1 = int(24000000.0 * tdiff1 + .5);
int tempo = tempomap.tempo(0);
int diff0 = tempo0 - tempo;
int diff1 = tempo1 - tempo0;
if (diff0) {
int newTempo = tempo + diff0/8 + diff1/16;
tempomap.setTempo(0, newTempo);
}
}
mclock2 = mclock1;
mclock1 = mclock0;
}
break;
case 0xf9: // midi tick (every 10 msec)
if (mcStart) {
song->setPos(0, mcStartTick);
mcStart = false;
return;
}
break;
case 0xfa: // start
if (debugSync)
printf(" start\n");
if (state == IDLE) {
seek(0);
startPlay(song->cpos());
}
break;
case 0xfb: // continue
if (debugSync)
printf(" continue\n");
if (state == IDLE) {
startPlay(song->cpos());
}
break;
case 0xfc: // stop
if (debugSync)
printf(" stop\n");
if (state == PLAY)
stopPlay();
break;
case 0xfd: // unknown
case 0xfe: // active sensing
case 0xff: // system reset
break;
}
}
//---------------------------------------------------------
// mtcSyncMsg
// process received mtc Sync
// seekFlag - first complete mtc frame received after
// start
//---------------------------------------------------------
void MidiThread::mtcSyncMsg(const MTC& mtc, bool seekFlag)
{
double time = mtc.time();
if (debugSync)
printf("mtcSyncMsg: time %f\n", time);
if (seekFlag && state == START_PLAY) {
// int tick = tempomap.time2tick(time);
state = PLAY;
write(sigFd, "1", 1); // say PLAY to gui
return;
}
// double curT = curTime();
if (tempoSN != tempomap.tempoSN()) {
double cpos = tempomap.tick2time(_midiTick, 0);
samplePosStart = samplePos - lrint(cpos * sampleRate);
rtcTickStart = rtcTick - lrint(cpos * realRtcTicks);
tempoSN = tempomap.tempoSN();
}
//
// diff is the time in sec MusE is out of sync
//
double diff = time - (double(samplePosStart)/double(sampleRate));
if (debugSync)
printf(" state %d diff %f\n", mtcState, diff);
}
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