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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005-2008 Christian Schoenebeck * |
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* Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev * |
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* Copyright (C) 2012-2017 Christian Schoenebeck and Andreas Persson * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (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 * |
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* GNU 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 License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#ifndef __LS_ENGINECHANNELBASE_H__ |
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#define __LS_ENGINECHANNELBASE_H__ |
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|
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#include "AbstractEngineChannel.h" |
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#include "common/MidiKeyboardManager.h" |
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#include "common/Voice.h" |
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#include "../common/ResourceManager.h" |
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|
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namespace LinuxSampler { |
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/// Command used by the instrument loader thread to |
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/// request an instrument change on a channel. |
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template <class R /* Region */, class I /* Instrument */> |
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class InstrumentChangeCmd { |
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public: |
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bool bChangeInstrument; ///< Set to true by the loader when the channel should change instrument. |
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I* pInstrument; ///< The new instrument. Also used by the loader to read the previously loaded instrument. |
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RTList<R*>* pRegionsInUse; ///< List of dimension regions in use by the currently loaded instrument. Continuously updated by the audio thread. |
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InstrumentScript* pScript; ///< Instrument script to be executed for this instrument. This is never NULL, it is always a valid InstrumentScript pointer. Use InstrumentScript::bHasValidScript whether it reflects a valid instrument script to be executed. |
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}; |
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|
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template<class R> |
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class RegionPools { |
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public: |
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virtual Pool<R*>* GetRegionPool(int index) = 0; |
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}; |
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|
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template<class V> |
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class NotePool { |
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public: |
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/** |
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* Pool from where Voice objects are allocated from (and freed back to). |
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*/ |
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virtual Pool<V>* GetVoicePool() = 0; |
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|
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/** |
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* Pool from where new Note objects are allocated from (and freed back to). |
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*/ |
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virtual Pool< Note<V> >* GetNotePool() = 0; |
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|
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/** |
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* Pool for saving already existing Note object IDs somewhere. |
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* |
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* @b IMPORTANT: This pool is @b NOT used for generating any IDs for |
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* Note objects! The respective Note objective IDs are emitted by |
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* the Note object pool (see GetNotePool() above). |
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*/ |
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virtual Pool<note_id_t>* GetNoteIDPool() = 0; |
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}; |
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|
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template <class V /* Voice */, class R /* Region */, class I /* Instrument */> |
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class EngineChannelBase: public AbstractEngineChannel, public MidiKeyboardManager<V>, public ResourceConsumer<I> { |
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public: |
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typedef typename RTList< Note<V> >::Iterator NoteIterator; |
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typedef typename RTList<R*>::Iterator RTListRegionIterator; |
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typedef typename MidiKeyboardManager<V>::MidiKey MidiKey; |
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|
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virtual MidiKeyboardManagerBase* GetMidiKeyboardManager() OVERRIDE { |
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return this; |
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} |
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|
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virtual void HandBack(I* Instrument) { |
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ResourceManager<InstrumentManager::instrument_id_t, I>* mgr = |
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dynamic_cast<ResourceManager<InstrumentManager::instrument_id_t, I>*>(pEngine->GetInstrumentManager()); |
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mgr->HandBack(Instrument, this); |
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} |
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|
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virtual void ClearRegionsInUse() { |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
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if (cmd.pRegionsInUse) cmd.pRegionsInUse->clear(); |
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cmd.bChangeInstrument = false; |
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} |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
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if (cmd.pRegionsInUse) cmd.pRegionsInUse->clear(); |
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cmd.bChangeInstrument = false; |
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} |
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} |
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|
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virtual void ResetRegionsInUse(Pool<R*>* pRegionPool[]) { |
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DeleteRegionsInUse(); |
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AllocateRegionsInUse(pRegionPool); |
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} |
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|
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virtual void DeleteRegionsInUse() { |
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RTList<R*>* previous = NULL; // prevent double free |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
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if (cmd.pRegionsInUse) { |
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previous = cmd.pRegionsInUse; |
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delete cmd.pRegionsInUse; |
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cmd.pRegionsInUse = NULL; |
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} |
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cmd.bChangeInstrument = false; |
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} |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
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if (cmd.pRegionsInUse) { |
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if (cmd.pRegionsInUse != previous) |
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delete cmd.pRegionsInUse; |
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cmd.pRegionsInUse = NULL; |
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} |
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cmd.bChangeInstrument = false; |
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} |
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} |
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|
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virtual void AllocateRegionsInUse(Pool<R*>* pRegionPool[]) { |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
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cmd.pRegionsInUse = new RTList<R*>(pRegionPool[0]); |
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cmd.bChangeInstrument = false; |
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} |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
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cmd.pRegionsInUse = new RTList<R*>(pRegionPool[1]); |
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cmd.bChangeInstrument = false; |
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} |
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} |
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|
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virtual void Connect(AudioOutputDevice* pAudioOut) OVERRIDE { |
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if (pEngine) { |
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if (pEngine->pAudioOutputDevice == pAudioOut) return; |
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DisconnectAudioOutputDevice(); |
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} |
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AbstractEngine* newEngine = AbstractEngine::AcquireEngine(this, pAudioOut); |
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{ |
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LockGuard lock(EngineMutex); |
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pEngine = newEngine; |
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} |
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ResetInternal(false/*don't reset engine*/); // 'false' is error prone here, but the danger of recursion with 'true' would be worse, there could be a better solution though |
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pEvents = new RTList<Event>(pEngine->pEventPool); |
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delayedEvents.pList = new RTList<Event>(pEngine->pEventPool); |
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|
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RegionPools<R>* pRegionPool = dynamic_cast<RegionPools<R>*>(pEngine); |
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// reset the instrument change command struct (need to be done |
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// twice, as it is double buffered) |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
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cmd.pRegionsInUse = new RTList<R*>(pRegionPool->GetRegionPool(0)); |
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cmd.pInstrument = 0; |
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cmd.bChangeInstrument = false; |
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} |
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{ |
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
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cmd.pRegionsInUse = new RTList<R*>(pRegionPool->GetRegionPool(1)); |
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cmd.pInstrument = 0; |
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cmd.bChangeInstrument = false; |
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} |
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|
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if (pInstrument != NULL) { |
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pInstrument = NULL; |
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InstrumentStat = -1; |
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InstrumentIdx = -1; |
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InstrumentIdxName = ""; |
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InstrumentFile = ""; |
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bStatusChanged = true; |
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} |
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|
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NotePool<V>* pNotePool = dynamic_cast<NotePool<V>*>(pEngine); |
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MidiKeyboardManager<V>::AllocateActiveNotesLists( |
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pNotePool->GetNotePool(), |
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pNotePool->GetVoicePool() |
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); |
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MidiKeyboardManager<V>::AllocateEventsLists(pEngine->pEventPool); |
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|
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AudioDeviceChannelLeft = 0; |
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AudioDeviceChannelRight = 1; |
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if (fxSends.empty()) { // render directly into the AudioDevice's output buffers |
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pChannelLeft = pAudioOut->Channel(AudioDeviceChannelLeft); |
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pChannelRight = pAudioOut->Channel(AudioDeviceChannelRight); |
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} else { // use local buffers for rendering and copy later |
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// ensure the local buffers have the correct size |
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if (pChannelLeft) delete pChannelLeft; |
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if (pChannelRight) delete pChannelRight; |
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pChannelLeft = new AudioChannel(0, pAudioOut->MaxSamplesPerCycle()); |
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pChannelRight = new AudioChannel(1, pAudioOut->MaxSamplesPerCycle()); |
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} |
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if (pEngine->EngineDisabled.GetUnsafe()) pEngine->Enable(); |
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MidiInputPort::AddSysexListener(pEngine); |
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} |
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|
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virtual void DisconnectAudioOutputDevice() OVERRIDE { |
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if (pEngine) { // if clause to prevent disconnect loops |
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|
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ResetInternal(false/*don't reset engine*/); // 'false' is error prone here, but the danger of recursion with 'true' would be worse, there could be a better solution though |
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|
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DeleteRegionsInUse(); |
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UnloadScriptInUse(); |
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|
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InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
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if (cmd.pInstrument) { |
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// release the currently loaded instrument |
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HandBack(cmd.pInstrument); |
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} |
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|
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if (pEvents) { |
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delete pEvents; |
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pEvents = NULL; |
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} |
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if (delayedEvents.pList) { |
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delete delayedEvents.pList; |
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delayedEvents.pList = NULL; |
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} |
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|
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MidiKeyboardManager<V>::DeleteActiveNotesLists(); |
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MidiKeyboardManager<V>::DeleteEventsLists(); |
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DeleteGroupEventLists(); |
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|
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AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice; |
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{ |
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LockGuard lock(EngineMutex); |
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pEngine = NULL; |
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} |
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AbstractEngine::FreeEngine(this, oldAudioDevice); |
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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if (!fxSends.empty()) { // free the local rendering buffers |
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if (pChannelLeft) delete pChannelLeft; |
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if (pChannelRight) delete pChannelRight; |
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} |
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pChannelLeft = NULL; |
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pChannelRight = NULL; |
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} |
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} |
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|
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class ClearEventListsHandler : public MidiKeyboardManager<V>::VoiceHandlerBase { |
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public: |
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virtual bool Process(MidiKey* pMidiKey) { pMidiKey->pEvents->clear(); return false; } |
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}; |
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|
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/** |
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* Free all events of the current audio fragment cycle. Calling |
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* this method will @b NOT free events scheduled past the current |
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* fragment's boundary! (@see AbstractEngineChannel::delayedEvents). |
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*/ |
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void ClearEventListsOfCurrentFragment() { |
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pEvents->clear(); |
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// empty MIDI key specific event lists |
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ClearEventListsHandler handler; |
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this->ProcessActiveVoices(&handler); |
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|
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// empty exclusive group specific event lists |
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// (pInstrument == 0 could mean that LoadInstrument is |
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// building new group event lists, so we must check |
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// for that) |
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if (pInstrument) ClearGroupEventLists(); |
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} |
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|
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// implementation of abstract methods derived from interface class 'InstrumentConsumer' |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* we are currently using on this EngineChannel is going to be updated, |
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* so we can stop playback before that happens. |
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*/ |
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virtual void ResourceToBeUpdated(I* pResource, void*& pUpdateArg) OVERRIDE { |
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dmsg(3,("EngineChannelBase: Received instrument update message.\n")); |
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if (pEngine) pEngine->DisableAndLock(); |
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ResetInternal(false/*don't reset engine*/); |
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this->pInstrument = NULL; |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* update process was completed, so we can continue with playback. |
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*/ |
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virtual void ResourceUpdated(I* pOldResource, I* pNewResource, void* pUpdateArg) OVERRIDE { |
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this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument()) |
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if (pEngine) pEngine->Enable(); |
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bStatusChanged = true; // status of engine has changed, so set notify flag |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager on progress changes |
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* while loading or realoading an instrument for this EngineChannel. |
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* |
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* @param fProgress - current progress as value between 0.0 and 1.0 |
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*/ |
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virtual void OnResourceProgress(float fProgress) OVERRIDE { |
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this->InstrumentStat = int(fProgress * 100.0f); |
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dmsg(7,("EngineChannelBase: progress %d%%", InstrumentStat)); |
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bStatusChanged = true; // status of engine has changed, so set notify flag |
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} |
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|
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/** |
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* Called on sustain pedal up events to check and if required, |
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* launch release trigger voices on the respective active key. |
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* |
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* @param pEngineChannel - engine channel on which this event occurred on |
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* @param itEvent - release trigger event (contains note number) |
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*/ |
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virtual void ProcessReleaseTriggerBySustain(RTList<Event>::Iterator& itEvent) OVERRIDE { |
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if (!pEngine) return; |
319 |
pEngine->ProcessReleaseTriggerBySustain(this, itEvent); |
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} |
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|
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void RenderActiveVoices(uint Samples) { |
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RenderVoicesHandler handler(this, Samples); |
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this->ProcessActiveVoices(&handler); |
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|
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SetVoiceCount(handler.VoiceCount); |
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SetDiskStreamCount(handler.StreamCount); |
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} |
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|
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/** |
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* Called by real-time instrument script functions to schedule a |
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* new note (new note-on event and a new @c Note object linked to it) |
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* @a delay microseconds in future. |
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* |
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* @b IMPORTANT: for the supplied @a delay to be scheduled |
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* correctly, the passed @a pEvent must be assigned a valid |
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* fragment time within the current audio fragment boundaries. That |
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* fragment time will be used by this method as basis for |
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* interpreting what "now" acutally is, and thus it will be used as |
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* basis for calculating the precise scheduling time for @a delay. |
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* The easiest way to achieve this is by copying a recent event |
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* which happened within the current audio fragment cycle: i.e. the |
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* original event which caused calling this method here, or by using |
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* Event::copyTimefrom() method to only copy the time, without any |
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* other event data. |
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* |
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* @param pEvent - note-on event to be scheduled in future (event |
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* data will be copied) |
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* @param delay - amount of microseconds in future (from now) when |
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* event shall be processed |
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* @returns unique note ID of scheduled new note, or NULL on error |
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*/ |
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note_id_t ScheduleNoteMicroSec(const Event* pEvent, int delay) OVERRIDE { |
354 |
// add (copied) note-on event into scheduler queue |
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const event_id_t noteOnEventID = ScheduleEventMicroSec(pEvent, delay); |
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if (!noteOnEventID) return 0; // error |
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// get access to (copied) event on the scheduler queue |
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RTList<Event>::Iterator itEvent = pEvents->fromID(noteOnEventID); |
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// stick a new note to the (copied) event on the queue |
360 |
const note_id_t noteID = pEngine->LaunchNewNote(this, itEvent); |
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return noteID; |
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} |
363 |
|
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/** |
365 |
* Called by real-time instrument script functions to ignore the note |
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* reflected by given note ID. The note's event will be freed immediately |
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* to its event pool and this will prevent voices to be launched for the |
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* note. |
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* |
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* NOTE: preventing a note by calling this method works only if the note |
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* was launched within the current audio fragment cycle. |
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* |
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* @param id - unique ID of note to be dropped |
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*/ |
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void IgnoreNote(note_id_t id) OVERRIDE { |
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Pool< Note<V> >* pNotePool = |
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dynamic_cast<NotePool<V>*>(pEngine)->GetNotePool(); |
378 |
|
379 |
NoteIterator itNote = pNotePool->fromID(id); |
380 |
if (!itNote) return; // note probably already released |
381 |
|
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// if the note already got active voices, then it is too late to drop it |
383 |
if (!itNote->pActiveVoices->isEmpty()) return; |
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|
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// if the original (note-on) event is not available anymore, then it is too late to drop it |
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RTList<Event>::Iterator itEvent = pEvents->fromID(itNote->eventID); |
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if (!itEvent) return; |
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|
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// drop the note |
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pNotePool->free(itNote); |
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|
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// drop the original event |
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pEvents->free(itEvent); |
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} |
395 |
|
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/** |
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* Copies the note IDs of all currently active notes on this engine |
398 |
* channel to the note ID buffer @a dstBuf, and returns the amount |
399 |
* of note IDs that have been copied to the destination buffer. |
400 |
* |
401 |
* @param dstBuf - destination buffer for note IDs |
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* @param bufSize - size of destination buffer (as amount of max. |
403 |
* note IDs, not as amount of bytes) |
404 |
* @returns amount of note IDs that have been copied to buffer |
405 |
*/ |
406 |
uint AllNoteIDs(note_id_t* dstBuf, uint bufSize) OVERRIDE { |
407 |
uint n = 0; |
408 |
|
409 |
Pool< Note<V> >* pNotePool = |
410 |
dynamic_cast<NotePool<V>*>(pEngine)->GetNotePool(); |
411 |
|
412 |
RTList<uint>::Iterator iuiKey = this->pActiveKeys->first(); |
413 |
RTList<uint>::Iterator end = this->pActiveKeys->end(); |
414 |
for(; iuiKey != end; ++iuiKey) { |
415 |
MidiKey* pKey = &this->pMIDIKeyInfo[*iuiKey]; |
416 |
NoteIterator itNote = pKey->pActiveNotes->first(); |
417 |
for (; itNote; ++itNote) { |
418 |
if (n >= bufSize) goto done; |
419 |
dstBuf[n++] = pNotePool->getID(itNote); |
420 |
} |
421 |
} |
422 |
done: |
423 |
return n; |
424 |
} |
425 |
|
426 |
RTList<R*>* pRegionsInUse; ///< temporary pointer into the instrument change command, used by the audio thread |
427 |
I* pInstrument; |
428 |
|
429 |
template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase; |
430 |
|
431 |
protected: |
432 |
EngineChannelBase() : |
433 |
MidiKeyboardManager<V>(this), |
434 |
InstrumentChangeCommandReader(InstrumentChangeCommand) |
435 |
{ |
436 |
pInstrument = NULL; |
437 |
|
438 |
// reset the instrument change command struct (need to be done |
439 |
// twice, as it is double buffered) |
440 |
{ |
441 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
442 |
cmd.pRegionsInUse = NULL; |
443 |
cmd.pInstrument = NULL; |
444 |
cmd.pScript = new InstrumentScript(this); |
445 |
cmd.bChangeInstrument = false; |
446 |
} |
447 |
{ |
448 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
449 |
cmd.pRegionsInUse = NULL; |
450 |
cmd.pInstrument = NULL; |
451 |
cmd.pScript = new InstrumentScript(this); |
452 |
cmd.bChangeInstrument = false; |
453 |
} |
454 |
} |
455 |
|
456 |
virtual ~EngineChannelBase() { |
457 |
InstrumentScript* previous = NULL; // prevent double free |
458 |
{ |
459 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
460 |
if (cmd.pScript) { |
461 |
previous = cmd.pScript; |
462 |
delete cmd.pScript; |
463 |
cmd.pScript = NULL; |
464 |
} |
465 |
} |
466 |
{ |
467 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
468 |
if (cmd.pScript) { |
469 |
if (previous != cmd.pScript) |
470 |
delete cmd.pScript; |
471 |
cmd.pScript = NULL; |
472 |
} |
473 |
} |
474 |
} |
475 |
|
476 |
typedef typename RTList<V>::Iterator RTListVoiceIterator; |
477 |
|
478 |
class RenderVoicesHandler : public MidiKeyboardManager<V>::VoiceHandlerBase { |
479 |
public: |
480 |
uint Samples; |
481 |
uint VoiceCount; |
482 |
uint StreamCount; |
483 |
EngineChannelBase<V, R, I>* pChannel; |
484 |
|
485 |
RenderVoicesHandler(EngineChannelBase<V, R, I>* channel, uint samples) : |
486 |
Samples(samples), VoiceCount(0), StreamCount(0), pChannel(channel) { } |
487 |
|
488 |
virtual void Process(RTListVoiceIterator& itVoice) { |
489 |
// now render current voice |
490 |
itVoice->Render(Samples); |
491 |
if (itVoice->IsActive()) { // still active |
492 |
if (!itVoice->Orphan) { |
493 |
*(pChannel->pRegionsInUse->allocAppend()) = itVoice->GetRegion(); |
494 |
} |
495 |
VoiceCount++; |
496 |
|
497 |
if (itVoice->PlaybackState == Voice::playback_state_disk) { |
498 |
if ((itVoice->DiskStreamRef).State != Stream::state_unused) StreamCount++; |
499 |
} |
500 |
} else { // voice reached end, is now inactive |
501 |
itVoice->VoiceFreed(); |
502 |
pChannel->FreeVoice(itVoice); // remove voice from the list of active voices |
503 |
} |
504 |
} |
505 |
}; |
506 |
|
507 |
typedef typename SynchronizedConfig<InstrumentChangeCmd<R, I> >::Reader SyncConfInstrChangeCmdReader; |
508 |
|
509 |
SynchronizedConfig<InstrumentChangeCmd<R, I> > InstrumentChangeCommand; |
510 |
SyncConfInstrChangeCmdReader InstrumentChangeCommandReader; |
511 |
|
512 |
/** This method is not thread safe! */ |
513 |
virtual void ResetInternal(bool bResetEngine) OVERRIDE { |
514 |
AbstractEngineChannel::ResetInternal(bResetEngine); |
515 |
|
516 |
MidiKeyboardManager<V>::Reset(); |
517 |
} |
518 |
|
519 |
virtual void ResetControllers() OVERRIDE { |
520 |
AbstractEngineChannel::ResetControllers(); |
521 |
|
522 |
MidiKeyboardManager<V>::SustainPedal = false; |
523 |
MidiKeyboardManager<V>::SostenutoPedal = false; |
524 |
} |
525 |
|
526 |
/** |
527 |
* Unload the currently used and loaded real-time instrument script. |
528 |
* The source code of the script is retained, so that it can still |
529 |
* be reloaded. |
530 |
*/ |
531 |
void UnloadScriptInUse() { |
532 |
{ |
533 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
534 |
if (cmd.pScript) cmd.pScript->unload(); |
535 |
} |
536 |
{ |
537 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
538 |
if (cmd.pScript) cmd.pScript->unload(); |
539 |
} |
540 |
InstrumentChangeCommand.SwitchConfig(); // switch back to original one |
541 |
} |
542 |
|
543 |
/** |
544 |
* Load real-time instrument script and all its resources required |
545 |
* for the upcoming instrument change. |
546 |
* |
547 |
* @param text - source code of script |
548 |
*/ |
549 |
void LoadInstrumentScript(const String& text) { |
550 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
551 |
// load the new script |
552 |
cmd.pScript->load(text); |
553 |
} |
554 |
|
555 |
/** |
556 |
* Changes the instrument for an engine channel. |
557 |
* |
558 |
* @param pInstrument - new instrument |
559 |
* @returns the resulting instrument change command after the |
560 |
* command switch, containing the old instrument and |
561 |
* the dimregions it is using |
562 |
*/ |
563 |
InstrumentChangeCmd<R, I>& ChangeInstrument(I* pInstrument) { |
564 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
565 |
cmd.pInstrument = pInstrument; |
566 |
cmd.bChangeInstrument = true; |
567 |
|
568 |
return InstrumentChangeCommand.SwitchConfig(); |
569 |
} |
570 |
|
571 |
virtual void ProcessKeySwitchChange(int key) = 0; |
572 |
}; |
573 |
|
574 |
} // namespace LinuxSampler |
575 |
|
576 |
#endif /* __LS_ENGINECHANNELBASE_H__ */ |