mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-05 00:36:57 +00:00
154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
/* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef AUDIO_MIDIPARSER_QT_H
|
|
#define AUDIO_MIDIPARSER_QT_H
|
|
|
|
#include "audio/midiparser.h"
|
|
#include "common/array.h"
|
|
#include "common/hashmap.h"
|
|
#include "common/queue.h"
|
|
#include "common/formats/quicktime.h"
|
|
|
|
/**
|
|
* @defgroup audio_midiparser_qt QT MIDI parser
|
|
* @ingroup audio
|
|
*
|
|
* @brief The QuickTime Music version of MidiParser class.
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* The QuickTime Music version of MidiParser.
|
|
*
|
|
* QuickTime Music is actually a superset of MIDI. It has its own custom
|
|
* instruments and supports more than 15 non-percussion channels. It also
|
|
* has custom control changes and a more advanced pitch bend (which we
|
|
* convert to GM pitch bend as best as possible). We then use the fallback
|
|
* GM instrument that each QuickTime instrument definition has to provide.
|
|
*
|
|
* Furthermore, Apple's documentation on this is terrible. You know
|
|
* documentation is bad when it contradicts itself three times on the same
|
|
* subject (like about setting the GM instrument field to percussion).
|
|
*
|
|
* This is as close to a proper QuickTime Music parser as we can currently
|
|
* implement using our MidiParser interface.
|
|
*/
|
|
class MidiParser_QT : public MidiParser, public Common::QuickTimeParser {
|
|
public:
|
|
MidiParser_QT(int8 source = -1) : _source(source) {}
|
|
~MidiParser_QT() {}
|
|
|
|
// MidiParser
|
|
bool loadMusic(byte *data, uint32 size) override;
|
|
void unloadMusic() override;
|
|
|
|
/**
|
|
* Load the MIDI from a 'Tune' resource
|
|
*/
|
|
bool loadFromTune(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
|
|
|
|
/**
|
|
* Load the MIDI from a QuickTime stream
|
|
*/
|
|
bool loadFromContainerStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
|
|
|
|
/**
|
|
* Load the MIDI from a QuickTime file
|
|
*/
|
|
bool loadFromContainerFile(const Common::Path &fileName);
|
|
|
|
protected:
|
|
// MidiParser
|
|
void parseNextEvent(EventInfo &info) override;
|
|
void resetTracking() override;
|
|
|
|
void sendToDriver(uint32 b) override;
|
|
void sendMetaEventToDriver(byte type, byte *data, uint16 length) override;
|
|
|
|
// QuickTimeParser
|
|
SampleDesc *readSampleDesc(Track *track, uint32 format, uint32 descSize) override;
|
|
|
|
/**
|
|
* The source number to use when sending MIDI messages to the driver.
|
|
* When using multiple sources, use source 0 and higher. This must be
|
|
* used when source volume or channel locking is used.
|
|
* By default this is -1, which means the parser is the only source
|
|
* of MIDI messages and multiple source functionality is disabled.
|
|
*/
|
|
int8 _source;
|
|
|
|
private:
|
|
struct MIDITrackInfo {
|
|
byte *data;
|
|
uint32 size;
|
|
uint32 timeScale;
|
|
};
|
|
|
|
struct PartStatus {
|
|
uint32 instrument;
|
|
byte volume;
|
|
byte pan;
|
|
uint16 pitchBend;
|
|
};
|
|
|
|
class MIDISampleDesc : public SampleDesc {
|
|
public:
|
|
MIDISampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
|
|
~MIDISampleDesc() {}
|
|
|
|
byte *_requestData;
|
|
uint32 _requestSize;
|
|
};
|
|
|
|
uint32 readNextEvent();
|
|
void handleGeneralEvent(uint32 control);
|
|
void handleControllerEvent(uint32 control, uint32 part, byte intPart, byte fracPart);
|
|
void handleNoteEvent(uint32 part, byte pitch, byte velocity, uint32 length);
|
|
|
|
void definePart(uint32 part, uint32 instrument);
|
|
void setupPart(uint32 part);
|
|
|
|
byte getChannel(uint32 part);
|
|
bool isChannelAllocated(byte channel) const;
|
|
byte findFreeChannel(uint32 part);
|
|
void deallocateFreeChannel();
|
|
void deallocateChannel(byte channel);
|
|
bool allChannelsAllocated() const;
|
|
|
|
byte *readWholeTrack(Common::QuickTimeParser::Track *track, uint32 &trackSize);
|
|
|
|
Common::Array<MIDITrackInfo> _trackInfo;
|
|
Common::Queue<EventInfo> _queuedEvents;
|
|
|
|
typedef Common::HashMap<uint, PartStatus> PartMap;
|
|
PartMap _partMap;
|
|
|
|
typedef Common::HashMap<uint, byte> ChannelMap;
|
|
ChannelMap _channelMap;
|
|
|
|
void initFromContainerTracks();
|
|
void initCommon();
|
|
uint32 readUint32();
|
|
};
|
|
/** @} */
|
|
#endif
|