diff options
| -rw-r--r-- | audio/midiparser_qt.cpp | 127 | ||||
| -rw-r--r-- | audio/module.mk | 1 |
2 files changed, 128 insertions, 0 deletions
diff --git a/audio/midiparser_qt.cpp b/audio/midiparser_qt.cpp new file mode 100644 index 0000000000..ca0bb85534 --- /dev/null +++ b/audio/midiparser_qt.cpp @@ -0,0 +1,127 @@ +/* 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; + }; + + class MIDISampleDesc : public SampleDesc { + public: + MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag); + ~MIDISampleDesc() {} + + Common::Array<NoteRequest> _noteRequests; + }; + + Common::String readString31(); + Common::Rational readFixed(); +}; + +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); + } + + 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); +} diff --git a/audio/module.mk b/audio/module.mk index e3aa0aaa81..4e1c031c83 100644 --- a/audio/module.mk +++ b/audio/module.mk @@ -4,6 +4,7 @@ MODULE_OBJS := \ audiostream.o \ fmopl.o \ mididrv.o \ + midiparser_qt.o \ midiparser_smf.o \ midiparser_xmidi.o \ midiparser.o \ |