annotate base/MatrixFile.h @ 96:1aebdc68ec6d

* Introduce simple non-RT thread base class * Rename MatrixFileCache to MatrixFile * some fixes & tidying
author Chris Cannam
date Thu, 04 May 2006 16:03:02 +0000
parents base/MatrixFileCache.h@040a151d0897
children 22494cc28c9f
rev   line source
Chris@87 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@87 2
Chris@87 3 /*
Chris@87 4 Sonic Visualiser
Chris@87 5 An audio file viewer and annotation editor.
Chris@87 6 Centre for Digital Music, Queen Mary, University of London.
Chris@87 7 This file copyright 2006 Chris Cannam.
Chris@87 8
Chris@87 9 This program is free software; you can redistribute it and/or
Chris@87 10 modify it under the terms of the GNU General Public License as
Chris@87 11 published by the Free Software Foundation; either version 2 of the
Chris@87 12 License, or (at your option) any later version. See the file
Chris@87 13 COPYING included with this distribution for more information.
Chris@87 14 */
Chris@87 15
Chris@87 16 #ifndef _MATRIX_FILE_CACHE_H_
Chris@87 17 #define _MATRIX_FILE_CACHE_H_
Chris@87 18
Chris@87 19 #include <sys/types.h>
Chris@87 20 #include <QString>
Chris@92 21 #include <QMutex>
Chris@92 22 #include <map>
Chris@87 23
Chris@95 24 #include "FileReadThread.h"
Chris@87 25
Chris@96 26 class MatrixFile : public QObject
Chris@87 27 {
Chris@95 28 Q_OBJECT
Chris@95 29
Chris@87 30 public:
Chris@87 31 enum Mode { ReadOnly, ReadWrite };
Chris@87 32
Chris@96 33 MatrixFile(QString fileBase, Mode mode);
Chris@96 34 virtual ~MatrixFile();
Chris@87 35
Chris@87 36 size_t getWidth() const;
Chris@87 37 size_t getHeight() const;
Chris@87 38
Chris@87 39 void resize(size_t width, size_t height);
Chris@87 40 void reset();
Chris@87 41
Chris@95 42 float getValueAt(size_t x, size_t y);
Chris@95 43 void getColumnAt(size_t x, float *values);
Chris@87 44
Chris@87 45 void setValueAt(size_t x, size_t y, float value);
Chris@87 46 void setColumnAt(size_t x, float *values);
Chris@95 47
Chris@95 48 protected slots:
Chris@95 49 void requestCancelled(int token);
Chris@95 50
Chris@87 51 protected:
Chris@87 52 int m_fd;
Chris@87 53 Mode m_mode;
Chris@87 54 size_t m_width;
Chris@87 55 size_t m_height;
Chris@87 56 size_t m_headerSize;
Chris@92 57 QString m_fileName;
Chris@95 58 size_t m_defaultCacheWidth;
Chris@95 59 size_t m_prevX;
Chris@87 60
Chris@95 61 struct Cache {
Chris@95 62 size_t x;
Chris@95 63 size_t width;
Chris@95 64 float *data;
Chris@95 65 };
Chris@90 66
Chris@95 67 Cache m_cache;
Chris@87 68
Chris@95 69 bool getValuesFromCache(size_t x, size_t ystart, size_t ycount,
Chris@95 70 float *values);
Chris@95 71
Chris@95 72 void primeCache(size_t x, bool left);
Chris@95 73
Chris@95 74 bool seekTo(size_t x, size_t y);
Chris@95 75
Chris@95 76 FileReadThread m_readThread;
Chris@95 77 int m_requestToken;
Chris@95 78 size_t m_requestingX;
Chris@95 79 size_t m_requestingWidth;
Chris@92 80
Chris@92 81 static std::map<QString, int> m_refcount;
Chris@92 82 static QMutex m_refcountMutex;
Chris@95 83 QMutex m_fdMutex;
Chris@95 84 QMutex m_cacheMutex;
Chris@87 85 };
Chris@87 86
Chris@87 87 #endif
Chris@87 88