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AUDIO: Clean up note request list reading

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This commit is contained in:
Matthew Hoops 2012-09-05 23:20:12 -04:00
parent ac4c8cd335
commit c5ab2fc95f
1 changed files with 39 additions and 28 deletions
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67
audio/midiparser_qt.cpp
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@ -54,50 +54,27 @@ private:
ToneDescription tone;
};
typedef Common::Array<NoteRequest> NoteRequestList;
class MIDISampleDesc : public SampleDesc {
public:
MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
~MIDISampleDesc() {}
Common::Array<NoteRequest> _noteRequests;
NoteRequestList _noteRequests;
};
Common::String readString31();
Common::Rational readFixed();
NoteRequestList readNoteRequestList();
};
Common::QuickTimeParser::SampleDesc *MidiParser_QT::readSampleDesc(Track *track, uint32 format) {
if (track->codecType == CODEC_TYPE_MIDI) {
debug(0, "MIDI Codec FourCC '%s'", tag2str(format));
/* uint32 flags = */ _fd->readUint32BE(); // always 0
MIDISampleDesc *entry = new MIDISampleDesc(track, format);
for (;;) {
uint32 event = _fd->readUint32BE();
if ((event & 0xF000FFFF) != 0xF0000017) // note request event
break;
NoteRequest request;
request.part = (event >> 16) & 0xFFF;
request.info.flags = _fd->readByte();
request.info.reserved = _fd->readByte();
request.info.polyphony = _fd->readUint16BE();
request.info.typicalPolyphony = readFixed();
request.tone.synthesizerType = _fd->readUint32BE();
request.tone.synthesizerName = readString31();
request.tone.instrumentName = readString31();
request.tone.instrumentNumber = _fd->readUint32BE();
request.tone.gmNumber = _fd->readUint32BE();
if (_fd->readUint32BE() != 0xC0010017) // general event note request
error("Invalid instrument end event");
entry->_noteRequests.push_back(request);
}
entry->_noteRequests = readNoteRequestList();
return entry;
}
@ -125,3 +102,37 @@ Common::Rational MidiParser_QT::readFixed() {
uint16 fractionalPart = _fd->readUint16BE();
return integerPart + Common::Rational(fractionalPart, 0x10000);
}
MidiParser_QT::NoteRequestList MidiParser_QT::readNoteRequestList() {
NoteRequestList requests;
/* uint32 flags = */ _fd->readUint32BE(); // always 0
for (;;) {
uint32 event = _fd->readUint32BE();
if (event == 0x60000000) // marker event
break;
else if ((event & 0xF000FFFF) != 0xF0000017) // note request event
error("Invalid note request event");
NoteRequest request;
request.part = (event >> 16) & 0xFFF;
request.info.flags = _fd->readByte();
request.info.reserved = _fd->readByte();
request.info.polyphony = _fd->readUint16BE();
request.info.typicalPolyphony = readFixed();
request.tone.synthesizerType = _fd->readUint32BE();
request.tone.synthesizerName = readString31();
request.tone.instrumentName = readString31();
request.tone.instrumentNumber = _fd->readUint32BE();
request.tone.gmNumber = _fd->readUint32BE();
if (_fd->readUint32BE() != 0xC0010017) // general event note request
error("Invalid instrument end event");
requests.push_back(request);
}
return requests;
}