/[svn]/linuxsampler/trunk/src/Sampler.h
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Diff of /linuxsampler/trunk/src/Sampler.h

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revision 57 by schoenebeck, Sun May 2 17:45:43 2004 UTC revision 1835 by iliev, Mon Feb 16 17:56:50 2009 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005 - 2008 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 "mididriver/MidiInputDevice.h"  #include "drivers/midi/MidiInputDevice.h"
34  #include "audiodriver/AudioOutputDevice.h"  #include "drivers/audio/AudioOutputDevice.h"
35    
36  namespace LinuxSampler {  namespace LinuxSampler {
37    
     /**  
      * Which sampler engine to be used.  
      */  
     enum engine_type_t {  
         engine_type_gig  
     };  
   
     /**  
      * Which audio output system to be used.  
      */  
     enum audio_output_type_t {  
         audio_output_type_alsa,  
         audio_output_type_jack  
     };  
   
     /**  
      * Which MIDI input system to be used.  
      */  
     enum midi_input_type_t {  
         midi_input_type_alsa  
     };  
   
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 you 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.
53               * channnel. If there was already a sampler engine deployed on               *
54               * this sampler channel, then the old engine will automatically               * @param EngineType - type of the engine to use
55               * be destroyed.               * @throws Exception - if \a EngineType is invalid
56                 * @see Sampler::AvailableEngineTypes()
57                 */
58                void SetEngineType(String EngineType) throw (Exception);
59    
60                /**
61                 * Connect this sampler channel to an audio output device, that
62                 * is an instance of an audio output driver. If this sampler
63                 * channel was already connected to an audio output device, then
64                 * the old connection will automatically be removed before.
65               *               *
66               * @param EngineType - type of the engine to deploy               * @param pDevice - audio output device to connect to
67               */               */
68              void LoadEngine(engine_type_t EngineType);              void SetAudioOutputDevice(AudioOutputDevice* pDevice);
69    
70              /**              /**
71               * Connect this sampler channel to an audio output device (that               * Connect this sampler channel to a MIDI input device.
              * is audio output driver) of the given type. If the audio  
              * output for the desired audio output system is not yet  
              * created, then it will be created automatically, but with  
              * default settings though. If this sampler channel was already  
              * connected to an audio output device, then the old connection  
              * will automatically be removed before.  
72               *               *
73               * @param AudioType - audio output system to connect to               * @param pDevice - MIDI input device to connect to
74               */               */
75              void SetAudioOutputDevice(audio_output_type_t AudioType);              void SetMidiInputDevice(MidiInputDevice *pDevice);
76    
77              /**              /**
78               * Connect this sampler channel to and MIDI input device (that               * Connect this sampler channel to a MIDI input port.
              * is MIDI input driver) of the given type. If the MIDI input  
              * driver for the desired MIDI input system is not yet created,  
              * then it will be created automatically, but with default  
              * settings though. If this sampler channel was already  
              * connected to a MIDI input device, then the old connection  
              * will automatically be removed before.  
79               *               *
80               * @param MidiType    - MIDI input system to connect to               * @param MidiPort - MIDI port to connect to
81                 */
82                void SetMidiInputPort(int MidiPort);
83    
84                /**
85                 * 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 listen
91                 */
92                void SetMidiInputChannel(midi_chan_t MidiChannel);
93    
94                /**
95                 * Connect this sampler channel to a MIDI input triplet.
96                 *
97                 * @param pDevice - MIDI input device to connect to
98                 * @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 SetMidiInputDevice(midi_input_type_t MidiType, MidiInputDevice::midi_chan_t MidiChannel = MidiInputDevice::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 device to which this sampler channel               * Returns the MIDI input channel to which this sampler
115               * is currently connected to.               * channel is currently connected to.
116               *               *
117               * @returns  pointer to MIDI input device or NULL if not               * @returns  The MIDI input channel on which the sampler
118               *           connected               *           channel is listening to.
119               */               */
120              MidiInputDevice* GetMidiInputDevice();              midi_chan_t GetMidiInputChannel();
121    
122                /**
123                 * Returns the MIDI input port number to which this sampler
124                 * channel is currently connected to.
125                 *
126                 * @returns  MIDI input port number or -1 if not connected
127                 */
128                int GetMidiInputPort();
129    
130              /**              /**
131               * Returns the audio output device to which this sampler channel               * Returns the audio output device to which this sampler channel
# Line 133  namespace LinuxSampler { Line 137  namespace LinuxSampler {
137              AudioOutputDevice* GetAudioOutputDevice();              AudioOutputDevice* GetAudioOutputDevice();
138    
139              /**              /**
140                 * Returns the MIDI input device to which this sampler channel
141                 * is currently connected to.
142                 *
143                 * @returns  pointer to MIDI input device or NULL if not
144                 *           connected
145                 */
146                MidiInputDevice* GetMidiInputDevice();
147    
148                /**
149               * Returns the index number of this sampler channel within the               * Returns the index number of this sampler channel within the
150               * Sampler instance.               * Sampler instance.
151               */               */
152              uint Index();              uint Index();
153    
154                /** Returns the sampler to which this channel belongs */
155                Sampler* GetSampler();
156                
157                /**
158                 * Registers the specified listener to be notified
159                 * when the engine type of this sampler channel is changed.
160                 */
161                void AddEngineChangeListener(EngineChangeListener* l);
162    
163                /**
164                 * Removes the specified listener.
165                 */
166                void RemoveEngineChangeListener(EngineChangeListener* l);
167    
168                /**
169                 * Removes the specified listener.
170                 */
171                void RemoveAllEngineChangeListeners();
172    
173                /**
174                 * Notifies listeners that the engine type of this sampler
175                 * channel is going to be changed soon.
176                 */
177                void fireEngineToBeChanged();
178    
179                /**
180                 * Notifies listeners that the engine
181                 * type of this sampler channel is changed.
182                 */
183                void fireEngineChanged();
184    
185    
186          protected:          protected:
187              SamplerChannel(Sampler* pS);              SamplerChannel(Sampler* pS);
188             ~SamplerChannel();              virtual ~SamplerChannel();
189    
190                /** Getting MIDI input device port given its index number. */
191                MidiInputPort* __GetMidiInputDevicePort(int iMidiPort);
192    
193              Sampler*           pSampler;              Sampler*           pSampler;
194              Engine*            pEngine;              EngineChannel*     pEngineChannel;
             MidiInputDevice*   pMidiInputDevice;  
195              AudioOutputDevice* pAudioOutputDevice;              AudioOutputDevice* pAudioOutputDevice;
196                MidiInputDevice*   pMidiInputDevice;
197              int                iIndex;              int                iIndex;
198    
199              friend class Sampler;              friend class Sampler;
200            private:
201                int                iMidiPort;   ///< Don't access directly, read GetMidiInputPort() instead !
202                midi_chan_t        midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead !
203                ListenerList<EngineChangeListener*> llEngineChangeListeners;
204      };      };
205    
206      /** LinuxSampler main class      /** @brief LinuxSampler main class
207       *       *
208       * This is the toplevel class for a LinuxSampler instance.       * This is the toplevel class for a LinuxSampler instance.
209       *       *
# Line 159  namespace LinuxSampler { Line 211  namespace LinuxSampler {
211       * sampler channel can individually be deployed with it's own sampler       * sampler channel can individually be deployed with it's own sampler
212       * engine, connected to an arbitrary MIDI input device and connected to       * engine, connected to an arbitrary MIDI input device and connected to
213       * an arbitrary audio output device. Here an example setup:       * an arbitrary audio output device. Here an example setup:
214         * @code
215         * S.Channel    MIDI in    S.Engine         Audio out
216         * -------------------------------------------------------------------
217         *   0          Alsa   ->  gig::Engine  ->  Jack
218         *   1          VSTi   ->  Akai::Engine ->  VSTi
219         *   2          Jack   ->  DLS::Engine  ->  Jack
220         *   3          Jack   ->  SF::Engine   ->  Alsa
221       *       *
222       *  S.Channel.      MIDI in         S.Engine                Audio out       * ... (and so on) ...
223       *  -------------------------------------------------------------------       * @endcode
      *  0               Alsa    ->      gig::Engine     ->      Jack  
      *  1               VSTi    ->      Akai::Engine    ->      VSTi  
      *  2               Jack    ->      DLS::Engine     ->      Jack  
      *  3               Jack    ->      SF::Engine      ->      Alsa  
      *  
      *  ... (and so on) ...  
224       *       *
225       * Note that not all audio and MIDI backends and sampler engines listed       * Note that not all audio and MIDI backends and sampler engines listed
226       * in the example above are already implemented!       * in the example above might already been implemented!
227       *       *
228       * 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
229       * several, different audio output and MIDI input systems       * several, different audio output and MIDI input systems
230       * simultaniously at the same time. Here the example setup shown in the       * simultaniously at the same time. Here the example setup shown in the
231       * ascpect of MIDI input and audio output devices / drivers:       * aspect of MIDI input and audio output devices / drivers:
232       *       * @code
233       *                            ######################### #########################       *                      ######################### #########################
234       *                            # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #       *                      # AudioOutputDeviceJack # # AudioOutputDeviceVSTi #
235       *                            ######################### #########################       *                      ######################### #########################
236       *                                          ^   ^           ^       *                                        ^   ^           ^
237       *    /------------>|Sampler Channel 0|-----/   |           |       *  /------------>|Sampler Channel 0|-----/   |           |
238       *    |  /--------->|Sampler Channel 1|---------------------/       *  |  /--------->|Sampler Channel 1|---------------------/
239       *    |  |    /---->|Sampler Channel 2|---------/       *  |  |  /------>|Sampler Channel 2|---------/
240       *    |  |    |  /->|Sampler Channel 3|------------>#########################       *  |  |  |  /--->|Sampler Channel 3|------------>#########################
241       *    |  |    |  |  ... (and so on) ...             # AudioOutputDeviceAlsa #       *  |  |  |  |    ... (and so on) ...             # AudioOutputDeviceAlsa #
242       *    |  |    |  |                                  #########################       *  |  |  |  |                                    #########################
243       *    |  |    |  \----------------------------------------------------\       *  |  |  |  \-----------------------------------------------------\
244       *    |  |    \-------------------------------------------\           |       *  |  |  \--------------------------------------------\           |
245       *    |  \--------------------\                           |           |       *  |  \--------------------\                          |           |
246       *    |                       |                           |           |       *  |                       |                          |           |
247       *  ####################### ####################### #######################       * ####################### ####################### #######################
248       *  # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #       * # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack #
249       *  ####################### ####################### #######################       * ####################### ####################### #######################
250         * @endcode
251       *       *
252       * 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
253       * driver / audio output driver) can be connected multiple times to       * driver / audio output driver) can be connected multiple times to
254       * different sampler channels.       * different sampler channels.
255         *
256         * It's even possible to create multiple instances of the same driver, for
257         * example multiple instances of the Alsa output driver to use multiple
258         * sound cards at the same time, or multiple instances of the JACK audio
259         * output driver to leverage SMP systems or boxes with several hard discs.
260       */       */
261      class Sampler {      class Sampler {
262          public:          public:
# Line 209  namespace LinuxSampler { Line 268  namespace LinuxSampler {
268              /**              /**
269               * Destructor.               * Destructor.
270               */               */
271             ~Sampler();              virtual ~Sampler();
272    
273              /**              /**
274               * Returns the number of sampler channels currently allocated.               * Returns the number of sampler channels currently allocated.
# Line 217  namespace LinuxSampler { Line 276  namespace LinuxSampler {
276              uint SamplerChannels();              uint SamplerChannels();
277    
278              /**              /**
279               * Create and add a new sampler channel to this Sampler instance.               * Create and add a new sampler channel to this Sampler
280                 * instance. For race condition reasons the new channel will use
281                 * an index past the last already existing sampler channel
282                 * index (in case the index limit was not reached yet, otherwise
283                 * a free index starting from 0 is searched).
284               *               *
285               * @returns  pointer to new sampler channel               * @returns  pointer to new sampler channel
286               */               */
# Line 232  namespace LinuxSampler { Line 295  namespace LinuxSampler {
295              SamplerChannel* GetSamplerChannel(uint uiSamplerChannel);              SamplerChannel* GetSamplerChannel(uint uiSamplerChannel);
296    
297              /**              /**
298                 * Returns all created sampler channels.
299                 */
300                std::map<uint, SamplerChannel*> GetSamplerChannels();
301    
302                /**
303               * Destroy and remove the given sampler channel from this               * Destroy and remove the given sampler channel from this
304               * Sampler instance.               * Sampler instance.
305               *               *
# Line 249  namespace LinuxSampler { Line 317  namespace LinuxSampler {
317              void RemoveSamplerChannel(uint uiSamplerChannel);              void RemoveSamplerChannel(uint uiSamplerChannel);
318    
319              /**              /**
320               * Create an audio output device of the given type.               * Destroy and remove all sampler channels from this
321                 * Sampler instance.
322                 */
323                void RemoveAllSamplerChannels();
324    
325                /**
326                 * Registers the specified listener to be notified
327                 * when the number of sampler chanels is changed.
328                 */
329                void AddChannelCountListener(ChannelCountListener* l);
330    
331                /**
332                 * Removes the specified listener.
333                 */
334                void RemoveChannelCountListener(ChannelCountListener* l);
335    
336                /**
337                 * Registers the specified listener to be notified
338                 * when the number of audio output devices is changed.
339                 */
340                void AddAudioDeviceCountListener(AudioDeviceCountListener* l);
341    
342                /**
343                 * Removes the specified listener.
344                 */
345                void RemoveAudioDeviceCountListener(AudioDeviceCountListener* l);
346    
347                
348                /**
349                 * Registers the specified listener to be notified
350                 * when the number of MIDI input devices is changed.
351                 */
352                void AddMidiDeviceCountListener(MidiDeviceCountListener* l);
353    
354                /**
355                 * Removes the specified listener.
356                 */
357                void RemoveMidiDeviceCountListener(MidiDeviceCountListener* l);
358    
359                /**
360                 * Registers the specified listener to be notified when the number
361                 * of active voices in a particular sampler channel is changed.
362                 */
363                void AddVoiceCountListener(VoiceCountListener* l);
364    
365                /**
366                 * Removes the specified listener.
367                 */
368                void RemoveVoiceCountListener(VoiceCountListener* l);
369    
370                /**
371                 * Notifies listeners that the number of active voices
372                 * on the specified sampler channel is changed.
373                 * @param ChannelId The numerical ID of the sampler channel.
374                 * @param NewCount The new number of active voices.
375                 */
376                void fireVoiceCountChanged(int ChannelId, int NewCount);
377    
378                /**
379                 * Registers the specified listener to be notified when the number
380                 * of active disk streams in a particular sampler channel is changed.
381                 */
382                void AddStreamCountListener(StreamCountListener* l);
383    
384                /**
385                 * Removes the specified listener.
386                 */
387                void RemoveStreamCountListener(StreamCountListener* l);
388    
389                /**
390                 * Notifies listeners that the number of active disk streams
391                 * on the specified sampler channel is changed.
392                 * @param ChannelId The numerical ID of the sampler channel.
393                 * @param NewCount The new number of active disk streams.
394                 */
395                void fireStreamCountChanged(int ChannelId, int NewCount);
396    
397                /**
398                 * Registers the specified listener to be
399                 * notified when the fill state of the disk stream
400                 * buffers on a specific sampler channel is changed.
401                 */
402                void AddBufferFillListener(BufferFillListener* l);
403    
404                /**
405                 * Removes the specified listener.
406                 */
407                void RemoveBufferFillListener(BufferFillListener* l);
408    
409                /**
410                 * Notifies listeners that the fill state of the disk stream
411                 * buffers on the specified sampler channel is changed.
412                 * @param ChannelId The numerical ID of the sampler channel.
413                 * @param FillData The buffer fill data for the specified sampler channel.
414                 */
415                void fireBufferFillChanged(int ChannelId, String FillData);
416    
417                /**
418                 * Registers the specified listener to be notified
419                 * when total number of active voices is changed.
420                 */
421                void AddTotalVoiceCountListener(TotalVoiceCountListener* l);
422    
423                /**
424                 * Removes the specified listener.
425                 */
426                void RemoveTotalVoiceCountListener(TotalVoiceCountListener* l);
427    
428                /**
429                 * Notifies listeners that the total number of active voices is changed.
430                 * @param NewCount The new number of active voices.
431                 */
432                void fireTotalVoiceCountChanged(int NewCount);
433                
434                void AddTotalStreamCountListener(TotalStreamCountListener* l);
435                void RemoveTotalStreamCountListener(TotalStreamCountListener* l);
436                void fireTotalStreamCountChanged(int NewCount);
437    
438                /**
439                 * Registers the specified listener to be notified when the number
440                 * of effect sends on a particular sampler channel is changed.
441                 */
442                void AddFxSendCountListener(FxSendCountListener* l);
443    
444                /**
445                 * Removes the specified listener.
446                 */
447                void RemoveFxSendCountListener(FxSendCountListener* l);
448    
449                /**
450                 * Returns the names of all available audio output drivers.
451                 */
452                std::vector<String> AvailableAudioOutputDrivers();
453    
454                /**
455                 * Returns the names of all available MIDI input drivers.
456                 */
457                std::vector<String> AvailableMidiInputDrivers();
458    
459                /**
460                 * Returns the names of all available sampler engine types.
461                 * @see SamplerChannel::SetEngineType()
462                 */
463                std::vector<String> AvailableEngineTypes();
464    
465                /**
466                 * Create an audio output device.
467               *               *
468               * @param AudioType - desired audio output system to use               * @param AudioDriver - name of the audio driver
469                 * @param Parameters - eventually needed driver parameters to
470                 *                     create the device
471               * @returns  pointer to created audio output device               * @returns  pointer to created audio output device
472                 * @throws Exception  if device could not be created
473               */               */
474              AudioOutputDevice* CreateAudioOutputDevice(audio_output_type_t AudioType);              AudioOutputDevice* CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception);
475    
476              /**              /**
477               * Returns the audio output device of the given type.               * Create a midi input device.
478               *               *
479               * @param AudioType - desired audio output system to use               * @param MidiDriver - name of the midi driver
480               * @returns  pointer to audio output device or NULL if device of               * @param Parameters - eventually needed driver parameters to
481               *           desired type is not yet created               *                     create the device
482                 * @returns  pointer to created midi input device
483                 * @throws Exception  if device could not be created
484                 */
485                MidiInputDevice* CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception);
486    
487                /**
488                 * Returns the number of all created audio output devices.
489                 */
490                uint AudioOutputDevices();
491    
492                /**
493                 * Returns the number of all created MIDI input devices.
494                 */
495                uint MidiInputDevices();
496    
497                /**
498                 * Returns all created audio output devices.
499                 */
500                std::map<uint, AudioOutputDevice*> GetAudioOutputDevices();
501    
502                /**
503                 * Returns all created MIDI input devices.
504               */               */
505              AudioOutputDevice* GetAudioOutputDevice(audio_output_type_t AudioType);              std::map<uint, MidiInputDevice*> GetMidiInputDevices();
506    
507              /**              /**
508               * Create a MIDI input device of the given type.               * Destroy the given audio output device and takes care if there
509                 * are still sampler engines connected to this device, etc.
510               *               *
511               * @param MidiType - desired MIDI input system to use               * @throws Exception  if sampler channels are still
512               * @returns  pointer to created MIDI input device               *                    connected to the device
513               */               */
514              MidiInputDevice* CreateMidiInputDevice(midi_input_type_t MidiType);              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception);
515    
516              /**              /**
517               * Returns the MIDI input device of the given type.               * Destroy all audio output devices and takes care if there
518                 * are still sampler engines connected to devices, etc.
519               *               *
520               * @param MidiType - desired MIDI input system to use               * @throws Exception  if sampler channels are still
521               * @returns  pointer to MIDI input device or NULL if device of               *                    connected to device
              *           desired type is not yet created  
522               */               */
523              MidiInputDevice* GetMidiInputDevice(midi_input_type_t MidiType);              void DestroyAllAudioOutputDevices() throw (Exception);
524    
525                /**
526                 * Destroy the given MIDI input device and takes care if there
527                 * are still sampler engines connected to this device, etc.
528                 *
529                 * @throws Exception  if sampler channels are still
530                 *                    connected to the device
531                 */
532                void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);
533    
534                /**
535                 * Destroy all MIDI input devices and take care if there
536                 * are still sampler engines connected to device, etc.
537                 *
538                 * @throws Exception  if sampler channels are still
539                 *                    connected to device
540                 */
541                void DestroyAllMidiInputDevices() throw (Exception);
542    
543                 /**
544                 * Gets the current number of all active streams.
545                 * @returns The current number of all active streams.
546                 */
547                int GetDiskStreamCount();
548    
549                /**
550                 * Gets the current number of all active voices.
551                 * @returns The current number of all active voices.
552                 */
553                int GetVoiceCount();
554    
555                /**
556                 * Reset the whole sampler. Destroy all engines, sampler
557                 * channels, MIDI input devices and audio output devices.
558                 */
559                void Reset();
560    
561                /**
562                 * Advise the FPU to treat denormal floating point numbers as
563                 * zero, to avoid severe performance penalty when dealing with
564                 * such extreme floating point values.
565                 *
566                 * @returns @c true if FPU supports it, @c false otherwise
567                 */
568                static bool EnableDenormalsAreZeroMode();
569    
570                /**
571                 * Notifies listeners about the current number of voices,
572                 * streams and total voices, and the current fill state of
573                 * the disk stream buffers.
574                 */
575                void fireStatistics();
576    
577          protected:          protected:
578              typedef std::map<audio_output_type_t, AudioOutputDevice*> AudioOutputDeviceMap;              /**
579              typedef std::map<midi_input_type_t, MidiInputDevice*> MidiInputDeviceMap;               * Notifies listeners that the number of sampler channels has been changed.
580                 * @param NewCount The new number of sampler channels.
581                 */
582                void fireChannelCountChanged(int NewCount);
583    
584              std::vector<SamplerChannel*> vSamplerChannels;   ///< contains all created sampler channels              /**
585              AudioOutputDeviceMap         AudioOutputDevices; ///< contains all created audio output devices               * Notifies listeners that the specified sampler channel has just
586              MidiInputDeviceMap           MidiInputDevices;               * been added.
587                 * @param pChannel The new sampler channel.
588                 */
589                void fireChannelAdded(SamplerChannel* pChannel);
590    
591                /**
592                 * Notifies listeners that the specified sampler channel is
593                 * going to be removed soon.
594                 * @param pChannel sampler channel to be removed.
595                 */
596                void fireChannelToBeRemoved(SamplerChannel* pChannel);
597    
598                /**
599                 * Notifies listeners that the number of audio output devices has been changed.
600                 * @param NewCount The new number of audio output devices.
601                 */
602                void fireAudioDeviceCountChanged(int NewCount);
603    
604                /**
605                 * Notifies listeners that the number of MIDI input devices has been changed.
606                 * @param NewCount The new number of MIDI input devices.
607                 */
608                void fireMidiDeviceCountChanged(int NewCount);
609    
610                /**
611                 * Notifies listeners that the supplied MIDI input device is
612                 * going to be destroyed soon.
613                 * @param pDevice MIDI input device to be destroyed
614                 */
615                void fireMidiDeviceToBeDestroyed(MidiInputDevice* pDevice);
616    
617                /**
618                 * Notifies listeners that the supplied MIDI input device was
619                 * just created.
620                 * @param pDevice new MIDI input device
621                 */
622                void fireMidiDeviceCreated(MidiInputDevice* pDevice);
623    
624                /**
625                 * Notifies listeners that the number of effect sends
626                 * on a particular sampler channel is changed.
627                 * @param ChannelId The numerical ID of the sampler channel.
628                 * @param NewCount The new number of sampler channels.
629                 */
630                void fireFxSendCountChanged(int ChannelId, int NewCount);
631    
632                typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;
633                typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;
634                typedef std::map<uint, SamplerChannel*> SamplerChannelMap;
635    
636                SamplerChannelMap     mSamplerChannels;    ///< contains all created sampler channels
637                AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices
638                MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices
639    
640                // statistics cache
641                uint uiOldTotalVoiceCount;
642                uint uiOldTotalStreamCount;
643                std::map<uint, uint> mOldVoiceCounts;
644                std::map<uint, uint> mOldStreamCounts;
645    
646              friend class SamplerChannel;              friend class SamplerChannel;
647    
648            private:
649                ListenerList<ChannelCountListener*> llChannelCountListeners;
650                ListenerList<AudioDeviceCountListener*> llAudioDeviceCountListeners;
651                ListenerList<MidiDeviceCountListener*> llMidiDeviceCountListeners;
652                ListenerList<VoiceCountListener*> llVoiceCountListeners;
653                ListenerList<StreamCountListener*> llStreamCountListeners;
654                ListenerList<BufferFillListener*> llBufferFillListeners;
655                ListenerList<TotalStreamCountListener*> llTotalStreamCountListeners;
656                ListenerList<TotalVoiceCountListener*> llTotalVoiceCountListeners;
657                ListenerList<FxSendCountListener*> llFxSendCountListeners;
658    
659                class EventHandler : public EngineChangeListener, public FxSendCountListener {
660                    public:
661                        void SetSampler(Sampler* pSampler) { this->pSampler = pSampler; }
662    
663                        /**
664                         * Invoked when the engine type of the specified sampler
665                         * channel is going to be changed soon.
666                         * @param ChannelId The numerical ID of the sampler channel
667                         */
668                        virtual void EngineToBeChanged(int ChannelId);
669    
670                        /**
671                         * Invoked when the engine type of the
672                         * specified sampler channel is changed.
673                         * @param ChannelId The numerical ID of the sampler
674                         * channel, which engine type has been changed.
675                         */
676                        virtual void EngineChanged(int ChannelId);
677    
678                        /**
679                         * Invoked when the number of effect sends
680                         * on the specified sampler channel has changed.
681                         * @param ChannelId The numerical ID of the sampler channel.
682                         * @param NewCount The new number of effect sends.
683                         */
684                        virtual void FxSendCountChanged(int ChannelId, int NewCount);
685    
686                    private:
687                        Sampler* pSampler;
688                } eventHandler;
689      };      };
690  }  }
691    
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