Mercurial > hg > svcore
view data/fileio/MIDIFileReader.h @ 335:02d2ad95ea52 spectrogram-cache-rejig
* Get storage advice for each cache in an FFT data server. Allows us to be
more confident about the actual memory situation and cut over from memory
to disc part way through an FFT calculation if necessary. StorageAdviser
is now a bit too optimistic though (it's too keen to allocate large numbers
of small blocks in memory).
author | Chris Cannam |
---|---|
date | Tue, 13 Nov 2007 13:54:10 +0000 |
parents | 73537d900d4b |
children | 183ee2a55fc7 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. 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. See the file COPYING included with this distribution for more information. */ /* This is a modified version of a source file from the Rosegarden MIDI and audio sequencer and notation editor. This file copyright 2000-2006 Richard Bown and Chris Cannam. */ #ifndef _MIDI_FILE_READER_H_ #define _MIDI_FILE_READER_H_ #include "DataFileReader.h" #include "base/RealTime.h" #include <map> #include <set> #include <vector> #include <QObject> class MIDIEvent; typedef unsigned char MIDIByte; class MIDIFileReader : public DataFileReader { Q_OBJECT public: MIDIFileReader(QString path, size_t mainModelSampleRate); virtual ~MIDIFileReader(); virtual bool isOK() const; virtual QString getError() const; virtual Model *load() const; protected: typedef std::vector<MIDIEvent *> MIDITrack; typedef std::map<unsigned int, MIDITrack> MIDIComposition; typedef std::pair<RealTime, double> TempoChange; // time, qpm typedef std::map<unsigned long, TempoChange> TempoMap; // key is MIDI time typedef enum { MIDI_SINGLE_TRACK_FILE = 0x00, MIDI_SIMULTANEOUS_TRACK_FILE = 0x01, MIDI_SEQUENTIAL_TRACK_FILE = 0x02, MIDI_FILE_BAD_FORMAT = 0xFF } MIDIFileFormatType; bool parseFile(); bool parseHeader(const std::string &midiHeader); bool parseTrack(unsigned int &trackNum); Model *loadTrack(unsigned int trackNum, Model *existingModel = 0, int minProgress = 0, int progressAmount = 100) const; bool consolidateNoteOffEvents(unsigned int track); void updateTempoMap(unsigned int track); void calculateTempoTimestamps(); RealTime getTimeForMIDITime(unsigned long midiTime) const; // Internal convenience functions // int midiBytesToInt(const std::string &bytes); long midiBytesToLong(const std::string &bytes); long getNumberFromMIDIBytes(int firstByte = -1); MIDIByte getMIDIByte(); std::string getMIDIBytes(unsigned long bytes); bool skipToNextTrack(); int m_timingDivision; // pulses per quarter note MIDIFileFormatType m_format; unsigned int m_numberOfTracks; long m_trackByteCount; bool m_decrementCount; std::map<int, QString> m_trackNames; std::set<unsigned int> m_loadableTracks; std::set<unsigned int> m_percussionTracks; MIDIComposition m_midiComposition; TempoMap m_tempoMap; QString m_path; std::ifstream *m_midiFile; size_t m_fileSize; QString m_error; size_t m_mainModelSampleRate; }; #endif // _MIDI_FILE_READER_H_