Added old abandoned KDE3 version of the RoseGarden MIDI tool

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 99 insertions, 0 deletions

diff --git a/src/gui/editors/segment/segmentcanvas/AudioPreviewThread.h b/src/gui/editors/segment/segmentcanvas/AudioPreviewThread.h
new file mode 100644
index 0000000..ae3ac81
--- /dev/null
+++ b/src/gui/editors/segment/segmentcanvas/AudioPreviewThread.h
@@ -0,0 +1,99 @@
+
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    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.
+*/
+
+#ifndef _RG_AUDIOPREVIEWTHREAD_H_
+#define _RG_AUDIOPREVIEWTHREAD_H_
+
+#include "base/RealTime.h"
+#include <map>
+#include <qevent.h>
+#include <qmutex.h>
+#include <qthread.h>
+#include <utility>
+#include <vector>
+
+
+class QObject;
+
+
+namespace Rosegarden
+{
+
+class AudioFileManager;
+
+
+class AudioPreviewThread : public QThread
+{
+public:
+    AudioPreviewThread(AudioFileManager *manager);
+    
+    virtual void run();
+    virtual void finish();
+    
+    struct Request {
+        int audioFileId;
+        RealTime audioStartTime;
+        RealTime audioEndTime;
+        int width;
+        bool showMinima;
+        QObject *notify;
+    };
+
+    virtual int requestPreview(const Request &request);
+    virtual void cancelPreview(int token);
+    virtual void getPreview(int token, unsigned int &channels,
+                            std::vector<float> &values);
+
+    void setEmptyQueueListener(QObject* o) { m_emptyQueueListener = o; }
+
+    static const QEvent::Type AudioPreviewReady;
+    static const QEvent::Type AudioPreviewQueueEmpty;
+    
+
+protected:
+    virtual bool process();
+
+
+    AudioFileManager *m_manager;
+    int m_nextToken;
+    bool m_exiting;
+
+    QObject* m_emptyQueueListener;
+
+    typedef std::pair<int, Request> RequestRec;
+    typedef std::multimap<int, RequestRec> RequestQueue;
+    RequestQueue m_queue;
+
+    typedef std::pair<unsigned int, std::vector<float> > ResultsPair;
+    typedef std::map<int, ResultsPair> ResultsQueue;
+    ResultsQueue m_results;
+
+    QMutex m_mutex;
+};
+
+
+}
+
+#endif