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AUDIO: Begin basic playback of QuickTime MIDI files

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Sounds almost correct, but too fast
This commit is contained in:
Matthew Hoops 2012-09-07 11:45:28 -04:00
parent 7e2f7099c8
commit c01dfba093
2 changed files with 113 additions and 1 deletions
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109
audio/midiparser_qt.cpp
View File

@ -96,8 +96,103 @@ bool MidiParser_QT::loadFromContainerFile(const Common::String &fileName) {
return true;
}
void MidiParser_QT::resetTracking() {
_loadedInstruments = 0;
}
void MidiParser_QT::parseNextEvent(EventInfo &info) {
// TODO
if (_loadedInstruments < _trackInfo[_active_track].noteRequests.size()) {
// Load instruments first
info.event = 0xC0 | _loadedInstruments;
info.basic.param1 = _trackInfo[_active_track].noteRequests[_loadedInstruments].tone.gmNumber;
_loadedInstruments++;
return;
}
info.delta = readNextEvent(info);
}
uint32 MidiParser_QT::readNextEvent(EventInfo &info) {
uint32 control = readUint32();
switch (control >> 28) {
case 0x0:
case 0x1:
// Rest
// We handle this by recursively adding up all the rests into the
// next event's delta
return readNextEvent(info) + (control & 0xFFFFFF);
case 0x2:
case 0x3:
// Note event
info.event = 0x90 | ((control >> 24) & 0x1F);
info.basic.param1 = ((control >> 18) & 0x3F) + 32;
info.basic.param2 = (control >> 11) & 0x7F;
info.length = (info.basic.param2 == 0) ? 0 : (control & 0x7FF);
break;
case 0x4:
case 0x5:
// Controller
info.event = 0xB0 | ((control >> 24) & 0x1F);
info.basic.param1 = (control >> 16) & 0xFF;
info.basic.param2 = (control >> 8) & 0xFF;
break;
case 0x6:
case 0x7:
// Marker
switch ((control >> 16) & 0xFF) {
case 0:
// End
info.event = 0xFF;
info.ext.type = 0x2F;
break;
case 1:
// Beat
warning("Encountered beat marker");
break;
case 2:
// Tempo
warning("Encountered tempo marker");
break;
default:
warning("Unknown marker");
}
break;
case 0x9: {
// Extended note event
uint32 extra = readUint32();
info.event = 0x90 | ((control >> 16) & 0xFFF);
info.basic.param1 = (control >> 8) & 0xFF;
info.basic.param2 = (extra >> 22) & 0x7F;
info.length = (info.basic.param2 == 0) ? 0 : (extra & 0x3FFFFF);
break;
}
case 0xA: {
// Extended controller
uint32 extra = readUint32();
info.event = 0xB0 | ((control >> 16) & 0xFFF);
info.basic.param1 = (extra >> 16) & 0x3FFF;
info.basic.param2 = (extra >> 8) & 0xFF; // ???
break;
}
case 0xB:
// Knob
error("Encountered knob event in QuickTime MIDI");
break;
case 0x8:
case 0xC:
case 0xD:
case 0xE:
// Reserved
readUint32();
break;
case 0xF:
// General
error("Encountered general event in QuickTime MIDI");
break;
}
return 0;
}
Common::QuickTimeParser::SampleDesc *MidiParser_QT::readSampleDesc(Track *track, uint32 format) {
@ -196,9 +291,15 @@ void MidiParser_QT::initCommon() {
// form, we can fill in the MidiParser tracks.
_num_tracks = _trackInfo.size();
assert(_num_tracks > 0);
for (uint32 i = 0; i < _trackInfo.size(); i++)
MidiParser::_tracks[i] = _trackInfo[i].data;
_ppqn = _trackInfo[0].timeScale;
resetTracking();
setTempo(500000);
setTrack(0);
}
byte *MidiParser_QT::readWholeTrack(Common::QuickTimeParser::Track *track) {
@ -229,6 +330,12 @@ byte *MidiParser_QT::readWholeTrack(Common::QuickTimeParser::Track *track) {
return output.getData();
}
uint32 MidiParser_QT::readUint32() {
uint32 value = READ_BE_UINT32(_position._play_pos);
_position._play_pos += 4;
return value;
}
MidiParser *MidiParser::createParser_QT() {
return new MidiParser_QT();
}

5
audio/midiparser_qt.h
View File

@ -43,6 +43,7 @@ public:
protected:
// MidiParser
void resetTracking();
void parseNextEvent(EventInfo &info);
// QuickTimeParser
@ -86,6 +87,8 @@ private:
NoteRequestList _noteRequests;
};
uint32 readNextEvent(EventInfo &info);
Common::String readString31(Common::SeekableReadStream *stream);
Common::Rational readFixed(Common::SeekableReadStream *stream);
NoteRequestList readNoteRequestList(Common::SeekableReadStream *stream);
@ -93,9 +96,11 @@ private:
byte *readWholeTrack(Common::QuickTimeParser::Track *track);
Common::Array<MIDITrackInfo> _trackInfo;
uint32 _loadedInstruments;
void initFromContainerTracks();
void initCommon();
uint32 readUint32();
};
#endif