/[svn]/linuxsampler/trunk/src/Sampler.h
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revision 209 by schoenebeck, Sun Jul 18 00:29:39 2004 UTC revision 1130 by iliev, Sun Mar 25 18:59:14 2007 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 25  Line 26 
26    
27  #include <vector>  #include <vector>
28  #include <map>  #include <map>
29    #include "EventListeners.h"
30  #include "common/global.h"  #include "common/global.h"
31  #include "common/LinuxSamplerException.h"  #include "common/Exception.h"
32  #include "engines/common/Engine.h"  #include "engines/EngineChannel.h"
33  #include "drivers/midi/MidiInputDevice.h"  #include "drivers/midi/MidiInputDevice.h"
34  #include "drivers/audio/AudioOutputDevice.h"  #include "drivers/audio/AudioOutputDevice.h"
35    
# Line 36  namespace LinuxSampler { Line 38  namespace LinuxSampler {
38      // just symbol prototyping      // just symbol prototyping
39      class Sampler;      class Sampler;
40    
41      /** LinuxSampler sampler channel      /** @brief LinuxSampler sampler channel
42       *       *
43       * Encapsulates one sampler engine, one connection to a MIDI input       * Encapsulates a channel of a specific sampler engine type, one
44       * device and one connection to an audio output device. You cannot       * connection to a MIDI input device and one connection to an audio
45       * create an instance of this class on your own, you have to use the       * output device. You cannot create an instance of this class on your
46       * AddSamplerChannel() method of the Sampler object to create a new       * own, you have to use the AddSamplerChannel() method of the Sampler
47       * sampler channel.       * object to create a new sampler channel.
48       */       */
49      class SamplerChannel {      class SamplerChannel {
50          public:          public:
51              /**              /**
52               * Deploy a sampler engine of the given type for this sampler               * Assign a sampler engine type to this sampler channel.
              * channnel. If there was already a sampler engine deployed on  
              * this sampler channel, then the old engine will automatically  
              * be destroyed.  
53               *               *
54               * @param EngineType - type of the engine to deploy               * @param EngineType - type of the engine to use
55                 * @throws Exception - if \a EngineType is invalid
56                 * @see Sampler::AvailableEngineTypes()
57               */               */
58              void LoadEngine(Engine::type_t EngineType); // TODO: to be changed to 'void LoadEngine(String EngineType) throws (LinuxSamplerException);'              void SetEngineType(String EngineType) throw (Exception);
59    
60              /**              /**
61               * Connect this sampler channel to an audio output device, that               * Connect this sampler channel to an audio output device, that
# Line 67  namespace LinuxSampler { Line 68  namespace LinuxSampler {
68              void SetAudioOutputDevice(AudioOutputDevice* pDevice);              void SetAudioOutputDevice(AudioOutputDevice* pDevice);
69    
70              /**              /**
71               * Connect this sampler channel to and MIDI input device.               * Connect this sampler channel to a MIDI input device.
72               *               *
73               * @param pDevice - MIDI input device to connect to               * @param pDevice - MIDI input device to connect to
74               */               */
75              void SetMidiInputDevice(MidiInputDevice *pDevice);              void SetMidiInputDevice(MidiInputDevice *pDevice);
76    
77              /**              /**
78               * Connect this sampler channel to and MIDI input port.               * Connect this sampler channel to a MIDI input port.
79               *               *
80               * @param MidiPort - MIDI port to connect to               * @param MidiPort - MIDI port to connect to
81               */               */
82              void SetMidiInputPort(int MidiPort);              void SetMidiInputPort(int MidiPort);
83    
84              /**              /**
85               * Connect this sampler channel to and MIDI input channel.               * Define on which MIDI channel(s) this sampler channel should
86                 * listen to. By default, that is after creation of a new
87                 * sampler channel, the sampler channel will listen to all MIDI
88                 * channels.
89               *               *
90               * @param MidiChannel - MIDI channel to connect to               * @param MidiChannel - MIDI channel to listen
91               */               */
92              void SetMidiInputChannel(MidiInputDevice::MidiInputPort::midi_chan_t MidiChannel);              void SetMidiInputChannel(midi_chan_t MidiChannel);
93    
94              /**              /**
95               * Connect this sampler channel to a MIDI input triplet.               * Connect this sampler channel to a MIDI input triplet.
96               *               *
97               * @param pDevice - MIDI input device to connect to               * @param pDevice - MIDI input device to connect to
98               * @param MidiPort - MIDI port to connect to               * @param iMidiPort - MIDI port to connect to
99               * @param MidiChannel - optional: MIDI channel on which the               * @param MidiChannel - optional: MIDI channel on which the
100               *                      sampler channel should listen to               *                      sampler channel should listen to
101               *                      (default: listen on all MIDI channels)               *                      (default: listen on all MIDI channels)
102               */               */
103              void SetMidiInput(MidiInputDevice* pDevice, int MidiPort, MidiInputDevice::MidiInputPort::midi_chan_t MidiChannel = MidiInputDevice::MidiInputPort::midi_chan_all);              void SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel = midi_chan_all);
104    
105              /**              /**
106               * Returns the engine that was deployed on this sampler channel.               * Returns the EngineChannel object that was deployed on this
107                 * sampler channel appropriate to the given sampler engine type.
108               *               *
109               * @returns  pointer to engine or NULL if no engine deployed               * @returns  pointer to engine or NULL if no engine deployed
110               */               */
111              Engine* GetEngine();              EngineChannel* GetEngineChannel();
112    
113              /**              /**
114               * Returns the MIDI input channel to which this sampler               * Returns the MIDI input channel to which this sampler
# Line 112  namespace LinuxSampler { Line 117  namespace LinuxSampler {
117               * @returns  The MIDI input channel on which the sampler               * @returns  The MIDI input channel on which the sampler
118               *           channel is listening to.               *           channel is listening to.
119               */               */
120              MidiInputDevice::MidiInputPort::midi_chan_t GetMidiInputChannel();              midi_chan_t GetMidiInputChannel();
121    
122              /**              /**
123               * Returns the MIDI input port number to which this sampler               * Returns the MIDI input port number to which this sampler
# Line 145  namespace LinuxSampler { Line 150  namespace LinuxSampler {
150               * Sampler instance.               * Sampler instance.
151               */               */
152              uint Index();              uint Index();
153                
154                /**
155                 * Registers the specified listener to be notified
156                 * when the engine type of this sampler channel is changed.
157                 */
158                void AddEngineChangeListener(EngineChangeListener* l);
159    
160                /**
161                 * Removes the specified listener.
162                 */
163                void RemoveEngineChangeListener(EngineChangeListener* l);
164    
165                /**
166                 * Removes the specified listener.
167                 */
168                void RemoveAllEngineChangeListeners();
169    
170                /**
171                 * Notifies listeners that the engine
172                 * type of this sampler channel is changed.
173                 */
174                void fireEngineChanged();
175    
176    
177          protected:          protected:
178              SamplerChannel(Sampler* pS);              SamplerChannel(Sampler* pS);
179             ~SamplerChannel();              virtual ~SamplerChannel();
180    
181              /** Getting MIDI input device port given its index number. */              /** Getting MIDI input device port given its index number. */
182              MidiInputDevice::MidiInputPort* GetMidiInputDevicePort(int MidiPort);              MidiInputPort* __GetMidiInputDevicePort(int iMidiPort);
183    
184              Sampler*           pSampler;              Sampler*           pSampler;
185              Engine*            pEngine;              EngineChannel*     pEngineChannel;
186              AudioOutputDevice* pAudioOutputDevice;              AudioOutputDevice* pAudioOutputDevice;
187              MidiInputDevice*   pMidiInputDevice;              MidiInputDevice*   pMidiInputDevice;
             int                midiPort;  
             MidiInputDevice::MidiInputPort::midi_chan_t midiChannel;  
188              int                iIndex;              int                iIndex;
189    
190              friend class Sampler;              friend class Sampler;
191            private:
192                int                iMidiPort;   ///< Don't access directly, read GetMidiInputPort() instead !
193                midi_chan_t        midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead !
194                ListenerList<EngineChangeListener*> llEngineChangeListeners;
195      };      };
196    
197      /** LinuxSampler main class      /** @brief LinuxSampler main class
198       *       *
199       * This is the toplevel class for a LinuxSampler instance.       * This is the toplevel class for a LinuxSampler instance.
200       *       *
# Line 172  namespace LinuxSampler { Line 202  namespace LinuxSampler {
202       * sampler channel can individually be deployed with it's own sampler       * sampler channel can individually be deployed with it's own sampler
203       * engine, connected to an arbitrary MIDI input device and connected to       * engine, connected to an arbitrary MIDI input device and connected to
204       * an arbitrary audio output device. Here an example setup:       * an arbitrary audio output device. Here an example setup:
205         * @code
206         * S.Channel    MIDI in    S.Engine         Audio out
207         * -------------------------------------------------------------------
208         *   0          Alsa   ->  gig::Engine  ->  Jack
209         *   1          VSTi   ->  Akai::Engine ->  VSTi
210         *   2          Jack   ->  DLS::Engine  ->  Jack
211         *   3          Jack   ->  SF::Engine   ->  Alsa
212       *       *
213       *  S.Channel.      MIDI in         S.Engine                Audio out       * ... (and so on) ...
214       *  -------------------------------------------------------------------       * @endcode
      *  0               Alsa    ->      gig::Engine     ->      Jack  
      *  1               VSTi    ->      Akai::Engine    ->      VSTi  
      *  2               Jack    ->      DLS::Engine     ->      Jack  
      *  3               Jack    ->      SF::Engine      ->      Alsa  
      *  
      *  ... (and so on) ...  
215       *       *
216       * Note that not all audio and MIDI backends and sampler engines listed       * Note that not all audio and MIDI backends and sampler engines listed
217       * in the example above are already implemented!       * in the example above might already been implemented!
218       *       *
219       * As you can see in the example setup, LinuxSampler is capable to use       * As you can see in the example setup, LinuxSampler is capable to use
220       * several, different audio output and MIDI input systems       * several, different audio output and MIDI input systems
221       * simultaniously at the same time. Here the example setup shown in the       * simultaniously at the same time. Here the example setup shown in the
222       * ascpect of MIDI input and audio output devices / drivers:       * aspect of MIDI input and audio output devices / drivers:
223       *       * @code
224       *                            ######################### #########################       *                      ######################### #########################
225       *                            # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #       *                      # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #
226       *                            ######################### #########################       *                      ######################### #########################
227       *                                          ^   ^           ^       *                                        ^   ^           ^
228       *    /------------>|Sampler Channel 0|-----/   |           |       *  /------------>|Sampler Channel 0|-----/   |           |
229       *    |  /--------->|Sampler Channel 1|---------------------/       *  |  /--------->|Sampler Channel 1|---------------------/
230       *    |  |    /---->|Sampler Channel 2|---------/       *  |  |  /------>|Sampler Channel 2|---------/
231       *    |  |    |  /->|Sampler Channel 3|------------>#########################       *  |  |  |  /--->|Sampler Channel 3|------------>#########################
232       *    |  |    |  |  ... (and so on) ...             # AudioOutputDeviceAlsa #       *  |  |  |  |    ... (and so on) ...             # AudioOutputDeviceAlsa #
233       *    |  |    |  |                                  #########################       *  |  |  |  |                                    #########################
234       *    |  |    |  \----------------------------------------------------\       *  |  |  |  \-----------------------------------------------------\
235       *    |  |    \-------------------------------------------\           |       *  |  |  \--------------------------------------------\           |
236       *    |  \--------------------\                           |           |       *  |  \--------------------\                          |           |
237       *    |                       |                           |           |       *  |                       |                          |           |
238       *  ####################### ####################### #######################       * ####################### ####################### #######################
239       *  # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #       * # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #
240       *  ####################### ####################### #######################       * ####################### ####################### #######################
241         * @endcode
242       *       *
243       * As you can see in this example setup, one device (that is midi input       * As you can see in this example setup, one device (that is midi input
244       * driver / audio output driver) can be connected multiple times to       * driver / audio output driver) can be connected multiple times to
245       * different sampler channels.       * different sampler channels.
246         *
247         * It's even possible to create multiple instances of the same driver, for
248         * example multiple instances of the Alsa output driver to use multiple
249         * sound cards at the same time, or multiple instances of the JACK audio
250         * output driver to leverage SMP systems or boxes with several hard discs.
251       */       */
252      class Sampler {      class Sampler {
253          public:          public:
# Line 222  namespace LinuxSampler { Line 259  namespace LinuxSampler {
259              /**              /**
260               * Destructor.               * Destructor.
261               */               */
262             ~Sampler();              virtual ~Sampler();
263    
264              /**              /**
265               * Returns the number of sampler channels currently allocated.               * Returns the number of sampler channels currently allocated.
# Line 271  namespace LinuxSampler { Line 308  namespace LinuxSampler {
308              void RemoveSamplerChannel(uint uiSamplerChannel);              void RemoveSamplerChannel(uint uiSamplerChannel);
309    
310              /**              /**
311                 * Registers the specified listener to be notified
312                 * when the number of sampler chanels is changed.
313                 */
314                void AddChannelCountListener(ChannelCountListener* l);
315    
316                /**
317                 * Removes the specified listener.
318                 */
319                void RemoveChannelCountListener(ChannelCountListener* l);
320    
321                /**
322                 * Registers the specified listener to be notified
323                 * when the number of audio output devices is changed.
324                 */
325                void AddAudioDeviceCountListener(AudioDeviceCountListener* l);
326    
327                /**
328                 * Removes the specified listener.
329                 */
330                void RemoveAudioDeviceCountListener(AudioDeviceCountListener* l);
331    
332                
333                /**
334                 * Registers the specified listener to be notified
335                 * when the number of MIDI input devices is changed.
336                 */
337                void AddMidiDeviceCountListener(MidiDeviceCountListener* l);
338    
339                /**
340                 * Removes the specified listener.
341                 */
342                void RemoveMidiDeviceCountListener(MidiDeviceCountListener* l);
343    
344                /**
345                 * Registers the specified listener to be notified when the number
346                 * of active voices in a particular sampler channel is changed.
347                 */
348                void AddVoiceCountListener(VoiceCountListener* l);
349    
350                /**
351                 * Removes the specified listener.
352                 */
353                void RemoveVoiceCountListener(VoiceCountListener* l);
354    
355                /**
356                 * Notifies listeners that the number of active voices
357                 * on the specified sampler channel is changed.
358                 * @param ChannelId The numerical ID of the sampler channel.
359                 * @param NewCount The new number of active voices.
360                 */
361                void fireVoiceCountChanged(int ChannelId, int NewCount);
362    
363                /**
364                 * Registers the specified listener to be notified when the number
365                 * of active disk streams in a particular sampler channel is changed.
366                 */
367                void AddStreamCountListener(StreamCountListener* l);
368    
369                /**
370                 * Removes the specified listener.
371                 */
372                void RemoveStreamCountListener(StreamCountListener* l);
373    
374                /**
375                 * Notifies listeners that the number of active disk streams
376                 * on the specified sampler channel is changed.
377                 * @param ChannelId The numerical ID of the sampler channel.
378                 * @param NewCount The new number of active disk streams.
379                 */
380                void fireStreamCountChanged(int ChannelId, int NewCount);
381    
382                /**
383                 * Registers the specified listener to be
384                 * notified when the fill state of the disk stream
385                 * buffers on a specific sampler channel is changed.
386                 */
387                void AddBufferFillListener(BufferFillListener* l);
388    
389                /**
390                 * Removes the specified listener.
391                 */
392                void RemoveBufferFillListener(BufferFillListener* l);
393    
394                /**
395                 * Notifies listeners that the fill state of the disk stream
396                 * buffers on the specified sampler channel is changed.
397                 * @param ChannelId The numerical ID of the sampler channel.
398                 * @param FillData The buffer fill data for the specified sampler channel.
399                 */
400                void fireBufferFillChanged(int ChannelId, String FillData);
401    
402                /**
403                 * Registers the specified listener to be notified
404                 * when total number of active voices is changed.
405                 */
406                void AddTotalVoiceCountListener(TotalVoiceCountListener* l);
407    
408                /**
409                 * Removes the specified listener.
410                 */
411                void RemoveTotalVoiceCountListener(TotalVoiceCountListener* l);
412    
413                /**
414                 * Notifies listeners that the total number of active voices is changed.
415                 * @param NewCount The new number of active voices.
416                 */
417                void fireTotalVoiceCountChanged(int NewCount);
418    
419                /**
420                 * Registers the specified listener to be notified when the number
421                 * of effect sends on a particular sampler channel is changed.
422                 */
423                void AddFxSendCountListener(FxSendCountListener* l);
424    
425                /**
426                 * Removes the specified listener.
427                 */
428                void RemoveFxSendCountListener(FxSendCountListener* l);
429    
430                /**
431               * Returns the names of all available audio output drivers.               * Returns the names of all available audio output drivers.
432               */               */
433              std::vector<String> AvailableAudioOutputDrivers();              std::vector<String> AvailableAudioOutputDrivers();
434    
435              /**              /**
436                 * Returns the names of all available MIDI input drivers.
437                 */
438                std::vector<String> AvailableMidiInputDrivers();
439    
440                /**
441                 * Returns the names of all available sampler engine types.
442                 * @see SamplerChannel::SetEngineType()
443                 */
444                std::vector<String> AvailableEngineTypes();
445    
446                /**
447               * Create an audio output device.               * Create an audio output device.
448               *               *
449               * @param AudioDriver - name of the audio driver               * @param AudioDriver - name of the audio driver
450               * @param Parameters - eventually needed driver parameters to               * @param Parameters - eventually needed driver parameters to
451               *                     create the device               *                     create the device
452               * @returns  pointer to created audio output device               * @returns  pointer to created audio output device
453               * @throws LinuxSamplerException  if device could not be created               * @throws Exception  if device could not be created
454               */               */
455              AudioOutputDevice* CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (LinuxSamplerException);              AudioOutputDevice* CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception);
456    
457              /**              /**
458               * Create a midi input device.               * Create a midi input device.
# Line 293  namespace LinuxSampler { Line 461  namespace LinuxSampler {
461               * @param Parameters - eventually needed driver parameters to               * @param Parameters - eventually needed driver parameters to
462               *                     create the device               *                     create the device
463               * @returns  pointer to created midi input device               * @returns  pointer to created midi input device
464               * @throws LinuxSamplerException  if device could not be created               * @throws Exception  if device could not be created
465               */               */
466              MidiInputDevice* CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (LinuxSamplerException);              MidiInputDevice* CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception);
467    
468              /**              /**
469               * Returns the number of all created audio output devices.               * Returns the number of all created audio output devices.
# Line 321  namespace LinuxSampler { Line 489  namespace LinuxSampler {
489               * Destroy the given audio output device and takes care if there               * Destroy the given audio output device and takes care if there
490               * are still sampler angines connected to this device, etc.               * are still sampler angines connected to this device, etc.
491               *               *
492               * @throws LinuxSamplerException  if sampler channels are still               * @throws Exception  if sampler channels are still
493               *                                connected to the device               *                    connected to the device
494               */               */
495              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (LinuxSamplerException);              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception);
496    
497              /**              /**
498               * Destroy the given MIDI input device and takes care if there               * Destroy the given MIDI input device and takes care if there
499               * are still sampler angines connected to this device, etc.               * are still sampler angines connected to this device, etc.
500               *               *
501               * @throws LinuxSamplerException  if sampler channels are still               * @throws Exception  if sampler channels are still
502               *                                connected to the device               *                    connected to the device
503               */               */
504              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (LinuxSamplerException);              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);
505    
506                /**
507                 * Gets the current number of all active voices.
508                 * @returns The current number of all active voices.
509                 */
510                int GetVoiceCount();
511    
512                /**
513                 * Reset the whole sampler. Destroy all engines, sampler
514                 * channels, MIDI input devices and audio output devices.
515                 */
516                void Reset();
517    
518          protected:          protected:
519                /**
520                 * Notifies listeners that the number of sampler channels has been changed.
521                 * @param NewCount The new number of sampler channels.
522                 */
523                void fireChannelCountChanged(int NewCount);
524    
525                /**
526                 * Notifies listeners that the number of audio output devices has been changed.
527                 * @param NewCount The new number of audio output devices.
528                 */
529                void fireAudioDeviceCountChanged(int NewCount);
530    
531                /**
532                 * Notifies listeners that the number of MIDI input devices has been changed.
533                 * @param NewCount The new number of MIDI input devices.
534                 */
535                void fireMidiDeviceCountChanged(int NewCount);
536    
537                /**
538                 * Notifies listeners that the number of effect sends
539                 * on a particular sampler channel is changed.
540                 * @param ChannelId The numerical ID of the sampler channel.
541                 * @param NewCount The new number of sampler channels.
542                 */
543                void fireFxSendCountChanged(int ChannelId, int NewCount);
544    
545              typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;              typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;
546              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;
547              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;
# Line 345  namespace LinuxSampler { Line 551  namespace LinuxSampler {
551              MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices              MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices
552    
553              friend class SamplerChannel;              friend class SamplerChannel;
554    
555            private:
556                ListenerList<ChannelCountListener*> llChannelCountListeners;
557                ListenerList<AudioDeviceCountListener*> llAudioDeviceCountListeners;
558                ListenerList<MidiDeviceCountListener*> llMidiDeviceCountListeners;
559                ListenerList<VoiceCountListener*> llVoiceCountListeners;
560                ListenerList<StreamCountListener*> llStreamCountListeners;
561                ListenerList<BufferFillListener*> llBufferFillListeners;
562                ListenerList<TotalVoiceCountListener*> llTotalVoiceCountListeners;
563                ListenerList<FxSendCountListener*> llFxSendCountListeners;
564    
565                class EventHandler : public EngineChangeListener, public FxSendCountListener {
566                    public:
567                        void SetSampler(Sampler* pSampler) { this->pSampler = pSampler; }
568    
569                        /**
570                         * Invoked when the engine type of the
571                         * specified sampler channel is changed.
572                         * @param ChannelId The numerical ID of the sampler
573                         * channel, which engine type has been changed.
574                         */
575                        virtual void EngineChanged(int ChannelId);
576    
577                        /**
578                         * Invoked when the number of effect sends
579                         * on the specified sampler channel has changed.
580                         * @param ChannelId The numerical ID of the sampler channel.
581                         * @param NewCount The new number of effect sends.
582                         */
583                        virtual void FxSendCountChanged(int ChannelId, int NewCount);
584    
585                    private:
586                        Sampler* pSampler;
587                } eventHandler;
588      };      };
589  }  }
590    
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