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135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef AUDIO_MIDIPARSER_QT_H
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#define AUDIO_MIDIPARSER_QT_H
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#include "audio/midiparser.h"
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#include "common/array.h"
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#include "common/hashmap.h"
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#include "common/queue.h"
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#include "common/quicktime.h"
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/**
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* The QuickTime Music version of MidiParser.
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*
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* QuickTime Music is actually a superset of MIDI. It has its own custom
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* instruments and supports more than 15 non-percussion channels. It also
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* has custom control changes and a more advanced pitch bend (which we
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* convert to GM pitch bend as best as possible). We then use the fallback
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* GM instrument that each QuickTime instrument definition has to provide.
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*
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* Furthermore, Apple's documentation on this is terrible. You know
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* documentation is bad when it contradicts itself three times on the same
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* subject (like about setting the GM instrument field to percussion).
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*
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* This is as close to a proper QuickTime Music parser as we can currently
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* implement using our MidiParser interface.
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*/
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class MidiParser_QT : public MidiParser, public Common::QuickTimeParser {
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public:
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MidiParser_QT() {}
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~MidiParser_QT() {}
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// MidiParser
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bool loadMusic(byte *data, uint32 size);
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void unloadMusic();
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/**
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* Load the MIDI from a 'Tune' resource
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*/
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bool loadFromTune(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
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/**
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* Load the MIDI from a QuickTime stream
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*/
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bool loadFromContainerStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
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/**
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* Load the MIDI from a QuickTime file
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*/
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bool loadFromContainerFile(const Common::String &fileName);
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protected:
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// MidiParser
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void parseNextEvent(EventInfo &info);
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void resetTracking();
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// QuickTimeParser
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SampleDesc *readSampleDesc(Track *track, uint32 format, uint32 descSize);
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private:
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struct MIDITrackInfo {
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byte *data;
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uint32 size;
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uint32 timeScale;
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};
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struct PartStatus {
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uint32 instrument;
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byte volume;
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byte pan;
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uint16 pitchBend;
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};
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class MIDISampleDesc : public SampleDesc {
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public:
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MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
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~MIDISampleDesc() {}
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byte *_requestData;
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uint32 _requestSize;
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};
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uint32 readNextEvent();
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void handleGeneralEvent(uint32 control);
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void handleControllerEvent(uint32 control, uint32 part, byte intPart, byte fracPart);
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void handleNoteEvent(uint32 part, byte pitch, byte velocity, uint32 length);
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void definePart(uint32 part, uint32 instrument);
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void setupPart(uint32 part);
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byte getChannel(uint32 part);
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bool isChannelAllocated(byte channel) const;
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byte findFreeChannel(uint32 part);
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void deallocateFreeChannel();
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void deallocateChannel(byte channel);
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bool allChannelsAllocated() const;
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byte *readWholeTrack(Common::QuickTimeParser::Track *track, uint32 &trackSize);
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Common::Array<MIDITrackInfo> _trackInfo;
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Common::Queue<EventInfo> _queuedEvents;
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typedef Common::HashMap<uint, PartStatus> PartMap;
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PartMap _partMap;
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typedef Common::HashMap<uint, byte> ChannelMap;
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ChannelMap _channelMap;
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void initFromContainerTracks();
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void initCommon();
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uint32 readUint32();
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};
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#endif
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