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/*
* PlayHandle.h - base class PlayHandle - core of rendering engine
*
* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* 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.
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#ifndef PLAY_HANDLE_H
#define PLAY_HANDLE_H
#include <QtCore/QList>
#include <QtCore/QMutex>
#include "MemoryManager.h"
#include "ThreadableJob.h"
#include "lmms_basics.h"
class QThread;
class Track;
class AudioPort;
class PlayHandle : public ThreadableJob
{
public:
enum Types
{
TypeNotePlayHandle = 0x01,
TypeInstrumentPlayHandle = 0x02,
TypeSamplePlayHandle = 0x04,
TypePresetPreviewHandle = 0x08
} ;
typedef Types Type;
enum
{
MaxNumber = 1024
} ;
PlayHandle( const Type type, f_cnt_t offset = 0 );
PlayHandle & operator = ( PlayHandle & p )
{
m_type = p.m_type;
m_offset = p.m_offset;
m_affinity = p.m_affinity;
m_usesBuffer = p.m_usesBuffer;
m_audioPort = p.m_audioPort;
return *this;
}
virtual ~PlayHandle();
virtual bool affinityMatters() const
{
return false;
}
const QThread* affinity() const
{
return m_affinity;
}
Type type() const
{
return m_type;
}
// required for ThreadableJob
virtual void doProcessing();
virtual bool requiresProcessing() const
{
return !isFinished();
}
void lock()
{
m_processingLock.lock();
}
void unlock()
{
m_processingLock.unlock();
}
bool tryLock()
{
return m_processingLock.tryLock();
}
virtual void play( sampleFrame* buffer ) = 0;
virtual bool isFinished() const = 0;
// returns the frameoffset at the start of the playhandle,
// ie. how many empty frames should be inserted at the start of the first period
f_cnt_t offset() const
{
return m_offset;
}
void setOffset( f_cnt_t _offset )
{
m_offset = _offset;
}
virtual bool isFromTrack( const Track * _track ) const = 0;
bool usesBuffer() const
{
return m_usesBuffer;
}
void setUsesBuffer( const bool b )
{
m_usesBuffer = b;
}
AudioPort * audioPort()
{
return m_audioPort;
}
void setAudioPort( AudioPort * port )
{
m_audioPort = port;
}
void releaseBuffer();
sampleFrame * buffer();
private:
Type m_type;
f_cnt_t m_offset;
QThread* m_affinity;
QMutex m_processingLock;
sampleFrame* m_playHandleBuffer;
bool m_bufferReleased;
bool m_usesBuffer;
AudioPort * m_audioPort;
} ;
typedef QList<PlayHandle *> PlayHandleList;
typedef QList<const PlayHandle *> ConstPlayHandleList;
#endif
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