mirror of
https://github.com/LMMS/lmms.git
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dc561a07e7
This reverts commit c517f1fa5a.
The commit was not very helpful and introduced new xrun problems.
Instead I'll be rewriting the part of LMMS where Mixer, Mixer's
quality settings, Buffer FIFO and AudioDevice are sticked together.
90 lines
1.9 KiB
C++
90 lines
1.9 KiB
C++
/*
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* fifo_buffer.h - FIFO fixed-size buffer
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*
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* Copyright (c) 2007 Javier Serrano Polo <jasp00/at/users.sourceforge.net>
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* Copyright (c) 2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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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 _FIFO_BUFFER_H
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#define _FIFO_BUFFER_H
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#include <QtCore/QSemaphore>
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template<typename T>
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class fifoBuffer
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{
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public:
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fifoBuffer( int _size ) :
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m_readerSem( _size ),
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m_writerSem( _size ),
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m_readerIndex( 0 ),
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m_writerIndex( 0 ),
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m_size( _size )
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{
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m_buffer = new T[_size];
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m_readerSem.acquire( _size );
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}
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~fifoBuffer()
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{
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delete[] m_buffer;
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m_readerSem.release( m_size );
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}
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void write( T _element )
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{
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m_writerSem.acquire();
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m_buffer[m_writerIndex++] = _element;
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m_writerIndex %= m_size;
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m_readerSem.release();
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}
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T read()
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{
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m_readerSem.acquire();
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T element = m_buffer[m_readerIndex++];
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m_readerIndex %= m_size;
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m_writerSem.release();
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return element;
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}
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bool available()
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{
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return m_readerSem.available();
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}
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private:
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QSemaphore m_readerSem;
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QSemaphore m_writerSem;
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int m_readerIndex;
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int m_writerIndex;
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int m_size;
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T * m_buffer;
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} ;
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#endif
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