src/engines/AbstractEngineChannel.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
 *   Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev        *
 *   Copyright (C) 2012-2016 Christian Schoenebeck and Andreas Persson     *
 *                                                                         *
 *   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; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __LS_ABSTRACTENGINECHANNEL_H__
#define __LS_ABSTRACTENGINECHANNEL_H__

#include "EngineChannel.h"
#include "AbstractEngine.h"

#include "../common/Pool.h"
#include "../common/RingBuffer.h"
#include "../common/ResourceManager.h"
#include "common/AbstractInstrumentManager.h"
#include "common/InstrumentScriptVM.h"

#define CTRL_TABLE_IDX_AFTERTOUCH   128
#define CTRL_TABLE_IDX_PITCHBEND    129

namespace LinuxSampler {

    class MidiKeyboardManagerBase;

    class AbstractEngineChannel: public EngineChannel, public InstrumentScriptConsumer {
        public:
            // implementation of abstract methods derived from interface class 'LinuxSampler::EngineChannel'
            virtual void    PrepareLoadInstrument(const char* FileName, uint Instrument) OVERRIDE;
            virtual void    Reset() OVERRIDE;
            virtual void    SendNoteOn(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendNoteOn(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
            virtual void    SendNoteOff(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendNoteOff(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
            virtual void    SendPitchbend(int Pitch, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendPitchbend(int Pitch, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
            virtual void    SendControlChange(uint8_t Controller, uint8_t Value, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendControlChange(uint8_t Controller, uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;            
            virtual void    SendChannelPressure(uint8_t Value, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendChannelPressure(uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
            virtual void    SendPolyphonicKeyPressure(uint8_t Key, uint8_t Value, uint8_t MidiChannel) OVERRIDE;
            virtual void    SendPolyphonicKeyPressure(uint8_t Key, uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
            virtual bool    StatusChanged(bool bNewStatus = false) OVERRIDE;
            virtual float   Volume() OVERRIDE;
            virtual void    Volume(float f) OVERRIDE;
            virtual float   Pan() OVERRIDE;
            virtual void    Pan(float f) OVERRIDE;
            virtual uint    Channels() OVERRIDE;
            virtual AudioOutputDevice* GetAudioOutputDevice() OVERRIDE;
            virtual void    SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) OVERRIDE;
            virtual int     OutputChannel(uint EngineAudioChannel) OVERRIDE;
            virtual void    Connect(MidiInputPort* pMidiPort) OVERRIDE;
            virtual void    Disconnect(MidiInputPort* pMidiPort) OVERRIDE;
            virtual void    DisconnectAllMidiInputPorts() OVERRIDE;
            virtual uint    GetMidiInputPortCount() OVERRIDE;
            virtual MidiInputPort* GetMidiInputPort(uint index) OVERRIDE;
            virtual midi_chan_t MidiChannel() OVERRIDE;
            virtual void    SetMidiChannel(midi_chan_t MidiChannel) OVERRIDE;
            virtual void    Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) OVERRIDE; // deprecated, may be removed
            virtual void    DisconnectMidiInputPort() OVERRIDE; // deprecated, may be removed
            virtual MidiInputPort* GetMidiInputPort() OVERRIDE; // deprecated, may be removed
            virtual String  InstrumentFileName() OVERRIDE;
            virtual String  InstrumentName() OVERRIDE;
            virtual int     InstrumentIndex() OVERRIDE;
            virtual int     InstrumentStatus() OVERRIDE;
            virtual Engine* GetEngine() OVERRIDE;
            virtual String  EngineName() OVERRIDE;
            virtual FxSend* AddFxSend(uint8_t MidiCtrl, String Name = "") throw (Exception) OVERRIDE;
            virtual FxSend* GetFxSend(uint FxSendIndex) OVERRIDE;
            virtual uint    GetFxSendCount() OVERRIDE;
            virtual void    RemoveFxSend(FxSend* pFxSend) OVERRIDE;
            virtual void    Connect(VirtualMidiDevice* pDevice) OVERRIDE;
            virtual void    Disconnect(VirtualMidiDevice* pDevice) OVERRIDE;

            // implementation of abstract methods derived from AbstractEngine::ScriptConsumer
            virtual void ResourceToBeUpdated(VMParserContext* pResource, void*& pUpdateArg) OVERRIDE {}
            virtual void ResourceUpdated(VMParserContext* pOldResource, VMParserContext* pNewResource, void* pUpdateArg) OVERRIDE {}
            virtual void OnResourceProgress(float fProgress) OVERRIDE {}

            virtual AbstractEngine::Format GetEngineFormat() = 0;
            virtual MidiKeyboardManagerBase* GetMidiKeyboardManager() = 0;

            AudioOutputDevice* GetAudioOutputDeviceSafe();

            script_callback_id_t GetScriptCallbackID(const ScriptEvent* e) const {
                return pScript->pEvents->getID(e);
            }

            RTList<ScriptEvent>::Iterator ScriptCallbackByID(script_callback_id_t id) const {
                return pScript->pEvents->fromID(id);
            }

            void ScheduleResumeOfScriptCallback(RTList<ScriptEvent>::Iterator& itCallback, sched_time_t now, bool forever);

            friend class AbstractVoice;
            friend class AbstractEngine;
            template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase;
            template<class EC, class R, class S, class D> friend class VoiceBase;

        //protected:
            AbstractEngineChannel();
            virtual ~AbstractEngineChannel();

            AbstractEngine*           pEngine;
            Mutex                     EngineMutex; ///< protects the Engine from access by the instrument loader thread when lscp is disconnecting
            Mutex                     MidiInputMutex; ///< Introduced when support for multiple MIDI inputs per engine channel was added: protects the MIDI event input ringbuffer on this engine channel to be accessed concurrently by multiple midi input threads. As alternative one might also move the ringbuffer from this engine channel to the individual MIDI ports/devices and let the sampler engine read the events from there instead of receiving them here.

        //protected:
            AudioChannel*             pChannelLeft;             ///< encapsulates the audio rendering buffer (left)
            AudioChannel*             pChannelRight;            ///< encapsulates the audio rendering buffer (right)
            int                       AudioDeviceChannelLeft;   ///< audio device channel number to which the left channel is connected to
            int                       AudioDeviceChannelRight;  ///< audio device channel number to which the right channel is connected to
            DoubleBuffer< ArrayList<MidiInputPort*> > midiInputs; ///< MIDI input ports on which this sampler engine channel shall listen to.
            midi_chan_t               midiChannel;              ///< MIDI channel(s) on which this engine channel listens to (on all MIDI input ports).
            RingBuffer<Event,false>*  pEventQueue;              ///< Input event queue.
            RTList<Event>*            pEvents;                  ///< All engine channel specific events for the current audio fragment.
            struct _DelayedEvents {
                RTList<Event>*            pList; ///< Unsorted list where all delayed events are moved to and remain here until they're finally processed.
                Pool<ScheduledEvent>      schedulerNodes; ///< Nodes used to sort the delayed events (stored on pList) with time sorted queue.
                RTAVLTree<ScheduledEvent> queue; ///< Used to access the delayed events (from pList) in time sorted manner.

                _DelayedEvents() : pList(NULL), schedulerNodes(CONFIG_MAX_EVENTS_PER_FRAGMENT) {}

                inline void clear() {
                    if (pList) pList->clear();
                    schedulerNodes.clear();
                    queue.clear();
                }
            } delayedEvents;
            uint8_t                   ControllerTable[130];     ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel. Number 128 is for channel pressure (mono aftertouch), 129 for pitch bend.
            String                    InstrumentFile;
            int                       InstrumentIdx;
            String                    InstrumentIdxName;
            int                       InstrumentStat;
            double                    GlobalVolume;             ///< Master volume factor set through the C++ API / LSCP (a value < 1.0 means attenuation, a value > 1.0 means amplification)
            double                    MidiVolume;               ///< Volume factor altered by MIDI CC#7 (a value < 1.0 means attenuation, a value > 1.0 means amplification)
            int                       Pitch;                    ///< Current (absolute) MIDI pitch value.
            float                     CurrentKeyDimension;      ///< Current value (0-1.0) for the keyboard dimension, altered by pressing a keyswitching key.
            bool                      PortamentoMode;           ///< in Portamento Mode we slide the pitch from the last note to the current note.
            float                     PortamentoTime;           ///< How long it will take to glide from the previous note to the current (in seconds)
            float                     PortamentoPos;            ///< Current position on the keyboard, that is integer and fractional part (only used if PortamentoMode is on)
            std::vector<FxSend*>      fxSends;
            int                       GlobalTranspose;          ///< amount of semi tones all notes should be transposed
            int                       iLastPanRequest;          ///< just for the return value of Pan(), so we don't have to make an injective function
            int                       iEngineIndexSelf;         ///< Reflects the index of this EngineChannel in the Engine's ArrayList.
            bool                      bStatusChanged;           ///< true in case an engine parameter has changed (e.g. new instrument, another volumet)
            uint32_t                  RoundRobinIndex;          ///< counter for round robin sample selection, incremented for each note on
            InstrumentScript*         pScript;                  ///< Points to the real-time instrument script(s) to be executed, NULL if current instrument does not have an instrument script. Even though the underlying VM representation of the script is shared among multiple sampler channels, the InstrumentScript object here is not shared though, it exists for each sampler channel separately.

            SynchronizedConfig< ArrayList<VirtualMidiDevice*> > virtualMidiDevices;
            SynchronizedConfig< ArrayList<VirtualMidiDevice*> >::Reader virtualMidiDevicesReader_AudioThread;
            SynchronizedConfig< ArrayList<VirtualMidiDevice*> >::Reader virtualMidiDevicesReader_MidiThread;

            // specialization of RTList that doesn't require the pool
            // to be provided at construction time
            template<typename T>
            class LazyList : public RTList<T> {
            public:
                using RTList<T>::allocAppend;
                using RTList<T>::pPool;

                LazyList() : RTList<T>(0) { }
                typename RTList<T>::Iterator allocAppend(Pool<T>* pool) {
                    pPool = pool;
                    return allocAppend();
                }
            };
            
            typedef std::map<uint, LazyList<Event>*> ActiveKeyGroupMap;
            ActiveKeyGroupMap ActiveKeyGroups;      ///< Contains event queues for key groups, ordered by key group ID.

            virtual void ResetControllers();
            virtual void ResetInternal(bool bResetEngine);
            virtual void RemoveAllFxSends();

            void ImportEvents(uint Samples);
            virtual note_id_t ScheduleNoteMicroSec(const Event* pEvent, int delay) = 0;
            event_id_t ScheduleEventMicroSec(const Event* pEvent, int delay);
            void IgnoreEvent(event_id_t id);
            virtual void IgnoreNote(note_id_t id) = 0;
            void IgnoreEventByScriptID(const ScriptID& id);

            void AddGroup(uint group);
            void HandleKeyGroupConflicts(uint KeyGroup, Pool<Event>::Iterator& itNoteOnEvent);
            void ClearGroupEventLists();
            void DeleteGroupEventLists();

        private:
            /**
             * Returns @c true if there are 2 ore more MidiInputPorts connected
             * to this engine channel.
             *
             * This method is currently only used to prevent unnecessary
             * MidiInputMutex.Lock() if there is not more than 1 MIDI input on
             * this engine channel.
             */
            inline bool hasMultipleMIDIInputs() const {
                //FIXME: leaves tiny time frames open (shortly after 1->2 devices connected or 2->1 disconnected) which could lead to concurrency issue for the purpose described above, however in practice it "should" be acceptable
                return midiInputs.unsafeBack().size() > 1;
            }

            inline bool applyTranspose(Event* event);
    };

} // namespace LinuxSampler

#endif  /* __LS_ABSTRACTENGINECHANNEL_H__ */

1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005-2008 Christian Schoenebeck *
7	* Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev *
8	* Copyright (C) 2012-2016 Christian Schoenebeck and Andreas Persson *
9	* *
10	* This program is free software; you can redistribute it and/or modify *
11	* it under the terms of the GNU General Public License as published by *
12	* the Free Software Foundation; either version 2 of the License, or *
13	* (at your option) any later version. *
14	* *
15	* This program is distributed in the hope that it will be useful, *
16	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
18	* GNU General Public License for more details. *
19	* *
20	* You should have received a copy of the GNU General Public License *
21	* along with this program; if not, write to the Free Software *
22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
23	* MA 02111-1307 USA *
24	***************************************************************************/
25
26	#ifndef __LS_ABSTRACTENGINECHANNEL_H__
27	#define __LS_ABSTRACTENGINECHANNEL_H__
28
29	#include "EngineChannel.h"
30	#include "AbstractEngine.h"
31
32	#include "../common/Pool.h"
33	#include "../common/RingBuffer.h"
34	#include "../common/ResourceManager.h"
35	#include "common/AbstractInstrumentManager.h"
36	#include "common/InstrumentScriptVM.h"
37
38	#define CTRL_TABLE_IDX_AFTERTOUCH 128
39	#define CTRL_TABLE_IDX_PITCHBEND 129
40
41	namespace LinuxSampler {
42
43	class MidiKeyboardManagerBase;
44
45	class AbstractEngineChannel: public EngineChannel, public InstrumentScriptConsumer {
46	public:
47	// implementation of abstract methods derived from interface class 'LinuxSampler::EngineChannel'
48	virtual void PrepareLoadInstrument(const char* FileName, uint Instrument) OVERRIDE;
49	virtual void Reset() OVERRIDE;
50	virtual void SendNoteOn(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel) OVERRIDE;
51	virtual void SendNoteOn(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
52	virtual void SendNoteOff(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel) OVERRIDE;
53	virtual void SendNoteOff(uint8_t Key, uint8_t Velocity, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
54	virtual void SendPitchbend(int Pitch, uint8_t MidiChannel) OVERRIDE;
55	virtual void SendPitchbend(int Pitch, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
56	virtual void SendControlChange(uint8_t Controller, uint8_t Value, uint8_t MidiChannel) OVERRIDE;
57	virtual void SendControlChange(uint8_t Controller, uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
58	virtual void SendChannelPressure(uint8_t Value, uint8_t MidiChannel) OVERRIDE;
59	virtual void SendChannelPressure(uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
60	virtual void SendPolyphonicKeyPressure(uint8_t Key, uint8_t Value, uint8_t MidiChannel) OVERRIDE;
61	virtual void SendPolyphonicKeyPressure(uint8_t Key, uint8_t Value, uint8_t MidiChannel, int32_t FragmentPos) OVERRIDE;
62	virtual bool StatusChanged(bool bNewStatus = false) OVERRIDE;
63	virtual float Volume() OVERRIDE;
64	virtual void Volume(float f) OVERRIDE;
65	virtual float Pan() OVERRIDE;
66	virtual void Pan(float f) OVERRIDE;
67	virtual uint Channels() OVERRIDE;
68	virtual AudioOutputDevice* GetAudioOutputDevice() OVERRIDE;
69	virtual void SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) OVERRIDE;
70	virtual int OutputChannel(uint EngineAudioChannel) OVERRIDE;
71	virtual void Connect(MidiInputPort* pMidiPort) OVERRIDE;
72	virtual void Disconnect(MidiInputPort* pMidiPort) OVERRIDE;
73	virtual void DisconnectAllMidiInputPorts() OVERRIDE;
74	virtual uint GetMidiInputPortCount() OVERRIDE;
75	virtual MidiInputPort* GetMidiInputPort(uint index) OVERRIDE;
76	virtual midi_chan_t MidiChannel() OVERRIDE;
77	virtual void SetMidiChannel(midi_chan_t MidiChannel) OVERRIDE;
78	virtual void Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) OVERRIDE; // deprecated, may be removed
79	virtual void DisconnectMidiInputPort() OVERRIDE; // deprecated, may be removed
80	virtual MidiInputPort* GetMidiInputPort() OVERRIDE; // deprecated, may be removed
81	virtual String InstrumentFileName() OVERRIDE;
82	virtual String InstrumentName() OVERRIDE;
83	virtual int InstrumentIndex() OVERRIDE;
84	virtual int InstrumentStatus() OVERRIDE;
85	virtual Engine* GetEngine() OVERRIDE;
86	virtual String EngineName() OVERRIDE;
87	virtual FxSend* AddFxSend(uint8_t MidiCtrl, String Name = "") throw (Exception) OVERRIDE;
88	virtual FxSend* GetFxSend(uint FxSendIndex) OVERRIDE;
89	virtual uint GetFxSendCount() OVERRIDE;
90	virtual void RemoveFxSend(FxSend* pFxSend) OVERRIDE;
91	virtual void Connect(VirtualMidiDevice* pDevice) OVERRIDE;
92	virtual void Disconnect(VirtualMidiDevice* pDevice) OVERRIDE;
93
94	// implementation of abstract methods derived from AbstractEngine::ScriptConsumer
95	virtual void ResourceToBeUpdated(VMParserContext* pResource, void*& pUpdateArg) OVERRIDE {}
96	virtual void ResourceUpdated(VMParserContext* pOldResource, VMParserContext* pNewResource, void* pUpdateArg) OVERRIDE {}
97	virtual void OnResourceProgress(float fProgress) OVERRIDE {}
98
99	virtual AbstractEngine::Format GetEngineFormat() = 0;
100	virtual MidiKeyboardManagerBase* GetMidiKeyboardManager() = 0;
101
102	AudioOutputDevice* GetAudioOutputDeviceSafe();
103
104	script_callback_id_t GetScriptCallbackID(const ScriptEvent* e) const {
105	return pScript->pEvents->getID(e);
106	}
107
108	RTList<ScriptEvent>::Iterator ScriptCallbackByID(script_callback_id_t id) const {
109	return pScript->pEvents->fromID(id);
110	}
111
112	void ScheduleResumeOfScriptCallback(RTList<ScriptEvent>::Iterator& itCallback, sched_time_t now, bool forever);
113
114	friend class AbstractVoice;
115	friend class AbstractEngine;
116	template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase;
117	template<class EC, class R, class S, class D> friend class VoiceBase;
118
119	//protected:
120	AbstractEngineChannel();
121	virtual ~AbstractEngineChannel();
122
123	AbstractEngine* pEngine;
124	Mutex EngineMutex; ///< protects the Engine from access by the instrument loader thread when lscp is disconnecting
125	Mutex MidiInputMutex; ///< Introduced when support for multiple MIDI inputs per engine channel was added: protects the MIDI event input ringbuffer on this engine channel to be accessed concurrently by multiple midi input threads. As alternative one might also move the ringbuffer from this engine channel to the individual MIDI ports/devices and let the sampler engine read the events from there instead of receiving them here.
126
127	//protected:
128	AudioChannel* pChannelLeft; ///< encapsulates the audio rendering buffer (left)
129	AudioChannel* pChannelRight; ///< encapsulates the audio rendering buffer (right)
130	int AudioDeviceChannelLeft; ///< audio device channel number to which the left channel is connected to
131	int AudioDeviceChannelRight; ///< audio device channel number to which the right channel is connected to
132	DoubleBuffer< ArrayList<MidiInputPort*> > midiInputs; ///< MIDI input ports on which this sampler engine channel shall listen to.
133	midi_chan_t midiChannel; ///< MIDI channel(s) on which this engine channel listens to (on all MIDI input ports).
134	RingBuffer<Event,false>* pEventQueue; ///< Input event queue.
135	RTList<Event>* pEvents; ///< All engine channel specific events for the current audio fragment.
136	struct _DelayedEvents {
137	RTList<Event>* pList; ///< Unsorted list where all delayed events are moved to and remain here until they're finally processed.
138	Pool<ScheduledEvent> schedulerNodes; ///< Nodes used to sort the delayed events (stored on pList) with time sorted queue.
139	RTAVLTree<ScheduledEvent> queue; ///< Used to access the delayed events (from pList) in time sorted manner.
140
141	_DelayedEvents() : pList(NULL), schedulerNodes(CONFIG_MAX_EVENTS_PER_FRAGMENT) {}
142
143	inline void clear() {
144	if (pList) pList->clear();
145	schedulerNodes.clear();
146	queue.clear();
147	}
148	} delayedEvents;
149	uint8_t ControllerTable[130]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel. Number 128 is for channel pressure (mono aftertouch), 129 for pitch bend.
150	String InstrumentFile;
151	int InstrumentIdx;
152	String InstrumentIdxName;
153	int InstrumentStat;
154	double GlobalVolume; ///< Master volume factor set through the C++ API / LSCP (a value < 1.0 means attenuation, a value > 1.0 means amplification)
155	double MidiVolume; ///< Volume factor altered by MIDI CC#7 (a value < 1.0 means attenuation, a value > 1.0 means amplification)
156	int Pitch; ///< Current (absolute) MIDI pitch value.
157	float CurrentKeyDimension; ///< Current value (0-1.0) for the keyboard dimension, altered by pressing a keyswitching key.
158	bool PortamentoMode; ///< in Portamento Mode we slide the pitch from the last note to the current note.
159	float PortamentoTime; ///< How long it will take to glide from the previous note to the current (in seconds)
160	float PortamentoPos; ///< Current position on the keyboard, that is integer and fractional part (only used if PortamentoMode is on)
161	std::vector<FxSend*> fxSends;
162	int GlobalTranspose; ///< amount of semi tones all notes should be transposed
163	int iLastPanRequest; ///< just for the return value of Pan(), so we don't have to make an injective function
164	int iEngineIndexSelf; ///< Reflects the index of this EngineChannel in the Engine's ArrayList.
165	bool bStatusChanged; ///< true in case an engine parameter has changed (e.g. new instrument, another volumet)
166	uint32_t RoundRobinIndex; ///< counter for round robin sample selection, incremented for each note on
167	InstrumentScript* pScript; ///< Points to the real-time instrument script(s) to be executed, NULL if current instrument does not have an instrument script. Even though the underlying VM representation of the script is shared among multiple sampler channels, the InstrumentScript object here is not shared though, it exists for each sampler channel separately.
168
169	SynchronizedConfig< ArrayList<VirtualMidiDevice*> > virtualMidiDevices;
170	SynchronizedConfig< ArrayList<VirtualMidiDevice*> >::Reader virtualMidiDevicesReader_AudioThread;
171	SynchronizedConfig< ArrayList<VirtualMidiDevice*> >::Reader virtualMidiDevicesReader_MidiThread;
172
173	// specialization of RTList that doesn't require the pool
174	// to be provided at construction time
175	template<typename T>
176	class LazyList : public RTList<T> {
177	public:
178	using RTList<T>::allocAppend;
179	using RTList<T>::pPool;
180
181	LazyList() : RTList<T>(0) { }
182	typename RTList<T>::Iterator allocAppend(Pool<T>* pool) {
183	pPool = pool;
184	return allocAppend();
185	}
186	};
187
188	typedef std::map<uint, LazyList<Event>*> ActiveKeyGroupMap;
189	ActiveKeyGroupMap ActiveKeyGroups; ///< Contains event queues for key groups, ordered by key group ID.
190
191	virtual void ResetControllers();
192	virtual void ResetInternal(bool bResetEngine);
193	virtual void RemoveAllFxSends();
194
195	void ImportEvents(uint Samples);
196	virtual note_id_t ScheduleNoteMicroSec(const Event* pEvent, int delay) = 0;
197	event_id_t ScheduleEventMicroSec(const Event* pEvent, int delay);
198	void IgnoreEvent(event_id_t id);
199	virtual void IgnoreNote(note_id_t id) = 0;
200	void IgnoreEventByScriptID(const ScriptID& id);
201
202	void AddGroup(uint group);
203	void HandleKeyGroupConflicts(uint KeyGroup, Pool<Event>::Iterator& itNoteOnEvent);
204	void ClearGroupEventLists();
205	void DeleteGroupEventLists();
206
207	private:
208	/**
209	* Returns @c true if there are 2 ore more MidiInputPorts connected
210	* to this engine channel.
211	*
212	* This method is currently only used to prevent unnecessary
213	* MidiInputMutex.Lock() if there is not more than 1 MIDI input on
214	* this engine channel.
215	*/
216	inline bool hasMultipleMIDIInputs() const {
217	//FIXME: leaves tiny time frames open (shortly after 1->2 devices connected or 2->1 disconnected) which could lead to concurrency issue for the purpose described above, however in practice it "should" be acceptable
218	return midiInputs.unsafeBack().size() > 1;
219	}
220
221	inline bool applyTranspose(Event* event);
222	};
223
224	} // namespace LinuxSampler
225
226	#endif /* __LS_ABSTRACTENGINECHANNEL_H__ */
227