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da8040764f
This fixes a few deadlocks where a PresetPreviewPlayHandle would be removed by the creation of a new PresetPreviewPlayHandle.
161 lines
3.1 KiB
C++
161 lines
3.1 KiB
C++
/*
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* PlayHandle.h - base class PlayHandle - core of rendering engine
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*
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* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - http://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef PLAY_HANDLE_H
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#define PLAY_HANDLE_H
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#include <QtCore/QThread>
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#include <QtCore/QVector>
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#include <QtCore/QMutex>
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#include "ThreadableJob.h"
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#include "lmms_basics.h"
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class Track;
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class AudioPort;
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class PlayHandle : public ThreadableJob
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{
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public:
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enum Types
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{
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TypeNotePlayHandle = 0x01,
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TypeInstrumentPlayHandle = 0x02,
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TypeSamplePlayHandle = 0x04,
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TypePresetPreviewHandle = 0x08
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} ;
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typedef Types Type;
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PlayHandle( const Type type, f_cnt_t offset = 0 );
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PlayHandle & operator = ( PlayHandle & p )
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{
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m_type = p.m_type;
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m_offset = p.m_offset;
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m_affinity = p.m_affinity;
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m_usesBuffer = p.m_usesBuffer;
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m_audioPort = p.m_audioPort;
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return *this;
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}
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virtual ~PlayHandle();
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virtual bool affinityMatters() const
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{
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return false;
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}
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const QThread* affinity() const
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{
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return m_affinity;
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}
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Type type() const
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{
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return m_type;
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}
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// required for ThreadableJob
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virtual void doProcessing();
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virtual bool requiresProcessing() const
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{
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return !isFinished();
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}
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void lock()
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{
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m_processingLock.lock();
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}
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void unlock()
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{
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m_processingLock.unlock();
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}
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bool tryLock()
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{
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return m_processingLock.tryLock();
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}
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virtual void play( sampleFrame* buffer ) = 0;
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virtual bool isFinished() const = 0;
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// returns the frameoffset at the start of the playhandle,
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// ie. how many empty frames should be inserted at the start of the first period
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f_cnt_t offset() const
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{
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return m_offset;
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}
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void setOffset( f_cnt_t _offset )
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{
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m_offset = _offset;
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}
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virtual bool isFromTrack( const Track * _track ) const = 0;
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bool usesBuffer() const
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{
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return m_usesBuffer;
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}
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void setUsesBuffer( const bool b )
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{
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m_usesBuffer = b;
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}
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AudioPort * audioPort()
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{
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return m_audioPort;
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}
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void setAudioPort( AudioPort * port )
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{
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m_audioPort = port;
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}
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void releaseBuffer();
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sampleFrame * buffer()
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{
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return m_playHandleBuffer;
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}
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private:
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Type m_type;
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f_cnt_t m_offset;
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QThread* m_affinity;
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QMutex m_processingLock;
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sampleFrame * m_playHandleBuffer;
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bool m_usesBuffer;
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AudioPort * m_audioPort;
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} ;
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typedef QList<PlayHandle *> PlayHandleList;
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typedef QList<const PlayHandle *> ConstPlayHandleList;
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#endif
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