bool processTracks(MIDI_PLAYER* pMp) {
int32_t deltaTick = pMp->currentTick - pMp->lastTick; // Must NEVER be negative!!!
if (deltaTick < 0) {
hal_printfWarning("Warning: deltaTick is negative! Fast forward? deltaTick=%d", deltaTick);
// TODO: correct time here, to prevent skips on following tempo changes!
deltaTick = 0;
}
bool eventsNeedToBeFetched = false;
pMp->allTracksAreFinished = true;
for (int iTrack = 0; iTrack < midiReadGetNumTracks(pMp->pMidiFile); iTrack++) {
pMp->pMidiFile->Track[iTrack].deltaTime -= deltaTick;
pMp->trackIsFinished = pMp->pMidiFile->Track[iTrack].ptrNew == pMp->pMidiFile->Track[iTrack].pEndNew;
if (!pMp->trackIsFinished) {
pMp->allTracksAreFinished = false;
eventsNeedToBeFetched = isItTimeToFireThisEvent(pMp, iTrack);
}
}
pMp->lastTick = pMp->currentTick;
return eventsNeedToBeFetched;
}
void TestEventList(const char *pFilename)
{
MIDI_FILE *mf = midiFileOpen(pFilename);
if (mf)
{
MIDI_MSG msg;
int i, iNum;
unsigned int j;
midiReadInitMessage(&msg);
iNum = midiReadGetNumTracks(mf);
for(i=0;i<iNum;i++)
{
printf("# Track %d\n", i);
while(midiReadGetNextMessage(mf, i, &msg))
{
printf("\t");
for(j=0;j<msg.iMsgSize;j++)
printf("%.2x ", msg.data[j]);
printf("\n");
}
}
midiReadFreeMessage(&msg);
midiFileClose(mf);
}
}
bool playMidiFile(MIDI_PLAYER* pMidiPlayer, const char *pFilename) {
if (!midiPlayerOpenFile(pMidiPlayer, pFilename))
return false;
hal_printfInfo("Midi Format: %d", pMidiPlayer->pMidiFile->Header.iVersion);
hal_printfInfo("Number of tracks: %d", midiReadGetNumTracks(pMidiPlayer->pMidiFile));
hal_printfSuccess("Start playing...");
return true;
}
bool midiPlayerOpenFile(MIDI_PLAYER* pMidiPlayer, const char* pFileName) {
pMidiPlayer->pMidiFile = midiFileOpen(pFileName);
if (!pMidiPlayer->pMidiFile)
return false;
// Load initial midi events
for (int iTrack = 0; iTrack < midiReadGetNumTracks(pMidiPlayer->pMidiFile); iTrack++) {
midiReadGetNextMessage(pMidiPlayer->pMidiFile, iTrack, &pMidiPlayer->msg[iTrack]);
pMidiPlayer->pMidiFile->Track[iTrack].deltaTime = pMidiPlayer->msg[iTrack].dt;
}
pMidiPlayer->startTime = hal_clock() * 1000;
pMidiPlayer->currentTick = 0;
pMidiPlayer->lastTick = 0;
pMidiPlayer->trackIsFinished = true;
pMidiPlayer->allTracksAreFinished = false;
pMidiPlayer->lastUsPerTick = pMidiPlayer->pMidiFile->usPerTick;
return true;
}
void LoadMIDIEventList(const char *pFilename)
{
printf("--- MIDISYS ENGINE: LoadMIDIEventList(\"%s\")\n", pFilename);
MIDI_FILE *mf = midiFileOpen(pFilename);
char str[128];
int ev;
int timeline_index = 0;
int track_index = 0;
MIDI_MSG msg;
if (mf)
{
int i, iNum;
unsigned int j;
midiReadInitMessage(&msg);
iNum = midiReadGetNumTracks(mf);
for(i=0;i<iNum;i++)
{
#ifdef SUPERVERBOSE
printf("# Track %d\n", i);
#endif
while(midiReadGetNextMessage(mf, i, &msg))
{
#ifdef SUPERVERBOSE
printf(" %.6ld ", msg.dwAbsPos);
#endif
if (msg.bImpliedMsg) { ev = msg.iImpliedMsg; }
else { ev = msg.iType; }
memcpy(&timeline[track_index][timeline_index], &msg, sizeof(MIDI_MSG));
if (ev == msgMetaEvent && msg.MsgData.MetaEvent.iType == metaTrackName)
{
strncpy(timeline_trackname[track_index], msg.MsgData.MetaEvent.Data.Text.pData, 8);
timeline_trackname[track_index][8] == '\0';
printf("track #%d, name = \"%s\"\n", track_index, timeline_trackname[track_index]);
}
#ifdef SUPERVERBOSE
DebugPrintEvent(ev,msg);
#endif
timeline_index++;
}
printf("track length: %d\n", timeline_index);
timeline_tracklength[track_index] = timeline_index;
track_index++;
timeline_index = 0;
}
timeline_trackcount = track_index;
midiReadFreeMessage(&msg);
midiFileClose(mf);
}
//timeline_length = timeline_index+1;
printf("--- MIDISYS ENGINE: LoadMIDIEventList() success\n");
}