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/* |
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* Copyright (C) 2005-2007 by Pieter Palmers |
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* |
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* This file is part of FFADO |
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* FFADO = Free Firewire (pro-)audio drivers for linux |
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* |
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* FFADO is based upon FreeBoB. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License version 2.1, as published by the Free Software Foundation; |
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* |
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* This library 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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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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* MA 02110-1301 USA |
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*/ |
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#ifndef __FFADO_TIMESOURCE__ |
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#define __FFADO_TIMESOURCE__ |
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#include "../debugmodule/debugmodule.h" |
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#include <vector> |
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typedef uint64_t ffado_microsecs_t; |
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namespace Util { |
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class TimeSource; |
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typedef std::vector<TimeSource *> TimeSourceVector; |
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typedef std::vector<TimeSource *>::iterator TimeSourceVectorIterator; |
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/*! |
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\brief The base class for all TimeSource's. |
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Any object that can act as a source of timing |
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information should subclass this class and implement |
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its virtual functions. |
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A TimeSource can be slaved to another TimeSource, allowing |
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the mapping of the master's time to the slave's time. |
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*/ |
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class TimeSource { |
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public: |
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TimeSource(); |
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virtual ~TimeSource(); |
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virtual ffado_microsecs_t getCurrentTime()=0; |
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virtual ffado_microsecs_t getCurrentTimeAsUsecs()=0; |
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virtual ffado_microsecs_t unWrapTime(ffado_microsecs_t t)=0; |
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virtual ffado_microsecs_t wrapTime(ffado_microsecs_t t)=0; |
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ffado_microsecs_t mapMasterTime(ffado_microsecs_t t); |
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bool updateTimeSource(); |
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bool registerSlave(TimeSource *ts); |
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bool unregisterSlave(TimeSource *ts); |
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virtual void setVerboseLevel(int l); |
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virtual void printTimeSourceInfo(); |
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protected: |
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private: |
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bool setMaster(TimeSource *ts); |
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void clearMaster(); |
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void initSlaveTimeSource(); |
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TimeSource * m_Master; |
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TimeSourceVector m_Slaves; |
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ffado_microsecs_t m_last_master_time; |
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ffado_microsecs_t m_last_time; |
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double m_slave_rate; |
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int64_t m_slave_offset; |
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double m_last_err; |
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DECLARE_DEBUG_MODULE; |
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}; |
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} // end of namespace Util |
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#endif /* __FFADO_TIMESOURCE__ */ |
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