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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "audio/midiparser.h"
#include "common/debug.h"
#include "common/quicktime.h"
class MidiParser_QT : /* public MidiParser, */ public Common::QuickTimeParser {
public:
MidiParser_QT() {}
~MidiParser_QT() {}
protected:
SampleDesc *readSampleDesc(Track *track, uint32 format);
private:
struct NoteRequestInfo {
byte flags;
byte reserved;
uint16 polyphony;
Common::Rational typicalPolyphony;
};
struct ToneDescription {
uint32 synthesizerType;
Common::String synthesizerName;
Common::String instrumentName;
uint32 instrumentNumber;
uint32 gmNumber;
};
struct NoteRequest {
uint16 part;
NoteRequestInfo info;
ToneDescription tone;
};
typedef Common::Array<NoteRequest> NoteRequestList;
class MIDISampleDesc : public SampleDesc {
public:
MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
~MIDISampleDesc() {}
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));
MIDISampleDesc *entry = new MIDISampleDesc(track, format);
entry->_noteRequests = readNoteRequestList();
return entry;
}
return 0;
}
MidiParser_QT::MIDISampleDesc::MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag) :
Common::QuickTimeParser::SampleDesc(parentTrack, codecTag) {
}
Common::String MidiParser_QT::readString31() {
byte size = _fd->readByte();
assert(size < 32);
Common::String string;
for (byte i = 0; i < size; i++)
string += (char)_fd->readByte();
_fd->skip(31 - size);
return string;
}
Common::Rational MidiParser_QT::readFixed() {
int16 integerPart = _fd->readSint16BE();
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;
}
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