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/*
Rosegarden
A MIDI and audio sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <richard.bown@ferventsoftware.com>
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_AUDIOPREVIEWUPDATER_H_
#define _RG_AUDIOPREVIEWUPDATER_H_
#include <stdint.h>
#include <unistd.h>
#include <tqobject.h>
#include <tqrect.h>
#include <vector>
class TQEvent;
namespace Rosegarden
{
class Segment;
class CompositionModelImpl;
class Composition;
class AudioPreviewThread;
class AudioPreviewUpdater : public TQObject
{
TQ_OBJECT
public:
AudioPreviewUpdater(AudioPreviewThread &thread,
const Composition &composition,
const Segment *segment,
const TQRect &displayExtent,
CompositionModelImpl *parent);
~AudioPreviewUpdater();
void update();
void cancel();
TQRect getDisplayExtent() const { return m_rect; }
void setDisplayExtent(const TQRect &rect) { m_rect = rect; }
const Segment *getSegment() const { return m_segment; }
const std::vector<float> &getComputedValues(unsigned int &channels) const
{ channels = m_channels; return m_values; }
signals:
void audioPreviewComplete(AudioPreviewUpdater*);
protected:
virtual bool event(TQEvent*);
AudioPreviewThread& m_thread;
const Composition& m_composition;
const Segment* m_segment;
TQRect m_rect;
bool m_showMinima;
unsigned int m_channels;
std::vector<float> m_values;
intptr_t m_previewToken;
};
}
#endif
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