/[svn]/linuxsampler/trunk/src/Sampler.h
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revision 890 by schoenebeck, Sat Jul 1 13:43:04 2006 UTC revision 1789 by iliev, Sat Nov 1 19:01:27 2008 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                        *   *   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 26  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/Exception.h"  #include "common/Exception.h"
32  #include "engines/EngineChannel.h"  #include "engines/EngineChannel.h"
# Line 52  namespace LinuxSampler { Line 53  namespace LinuxSampler {
53               *               *
54               * @param EngineType - type of the engine to use               * @param EngineType - type of the engine to use
55               * @throws Exception - if \a EngineType is invalid               * @throws Exception - if \a EngineType is invalid
56                 * @see Sampler::AvailableEngineTypes()
57               */               */
58              void SetEngineType(String EngineType) throw (Exception);              void SetEngineType(String EngineType) throw (Exception);
59    
# Line 149  namespace LinuxSampler { Line 151  namespace LinuxSampler {
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              virtual ~SamplerChannel();              virtual ~SamplerChannel();
# Line 166  namespace LinuxSampler { Line 200  namespace LinuxSampler {
200          private:          private:
201              int                iMidiPort;   ///< Don't access directly, read GetMidiInputPort() instead !              int                iMidiPort;   ///< Don't access directly, read GetMidiInputPort() instead !
202              midi_chan_t        midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead !              midi_chan_t        midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead !
203                ListenerList<EngineChangeListener*> llEngineChangeListeners;
204      };      };
205    
206      /** @brief LinuxSampler main class      /** @brief LinuxSampler main class
# Line 177  namespace LinuxSampler { Line 212  namespace LinuxSampler {
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       * @code
215       * S.Channel.       MIDI in         S.Engine                Audio out       * S.Channel    MIDI in    S.Engine         Audio out
216       * -------------------------------------------------------------------       * -------------------------------------------------------------------
217       * 0                Alsa    ->      gig::Engine     ->      Jack       *   0          Alsa   ->  gig::Engine  ->  Jack
218       * 1                VSTi    ->      Akai::Engine    ->      VSTi       *   1          VSTi   ->  Akai::Engine ->  VSTi
219       * 2                Jack    ->      DLS::Engine     ->      Jack       *   2          Jack   ->  DLS::Engine  ->  Jack
220       * 3                Jack    ->      SF::Engine      ->      Alsa       *   3          Jack   ->  SF::Engine   ->  Alsa
221       *       *
222       * ... (and so on) ...       * ... (and so on) ...
223       * @endcode       * @endcode
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       * @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       * ####################### ####################### #######################       * ####################### ####################### #######################
# Line 217  namespace LinuxSampler { Line 252  namespace LinuxSampler {
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 277  namespace LinuxSampler { Line 317  namespace LinuxSampler {
317              void RemoveSamplerChannel(uint uiSamplerChannel);              void RemoveSamplerChannel(uint uiSamplerChannel);
318    
319              /**              /**
320                 * Registers the specified listener to be notified
321                 * when the number of sampler chanels is changed.
322                 */
323                void AddChannelCountListener(ChannelCountListener* l);
324    
325                /**
326                 * Removes the specified listener.
327                 */
328                void RemoveChannelCountListener(ChannelCountListener* l);
329    
330                /**
331                 * Registers the specified listener to be notified
332                 * when the number of audio output devices is changed.
333                 */
334                void AddAudioDeviceCountListener(AudioDeviceCountListener* l);
335    
336                /**
337                 * Removes the specified listener.
338                 */
339                void RemoveAudioDeviceCountListener(AudioDeviceCountListener* l);
340    
341                
342                /**
343                 * Registers the specified listener to be notified
344                 * when the number of MIDI input devices is changed.
345                 */
346                void AddMidiDeviceCountListener(MidiDeviceCountListener* l);
347    
348                /**
349                 * Removes the specified listener.
350                 */
351                void RemoveMidiDeviceCountListener(MidiDeviceCountListener* l);
352    
353                /**
354                 * Registers the specified listener to be notified when the number
355                 * of active voices in a particular sampler channel is changed.
356                 */
357                void AddVoiceCountListener(VoiceCountListener* l);
358    
359                /**
360                 * Removes the specified listener.
361                 */
362                void RemoveVoiceCountListener(VoiceCountListener* l);
363    
364                /**
365                 * Notifies listeners that the number of active voices
366                 * on the specified sampler channel is changed.
367                 * @param ChannelId The numerical ID of the sampler channel.
368                 * @param NewCount The new number of active voices.
369                 */
370                void fireVoiceCountChanged(int ChannelId, int NewCount);
371    
372                /**
373                 * Registers the specified listener to be notified when the number
374                 * of active disk streams in a particular sampler channel is changed.
375                 */
376                void AddStreamCountListener(StreamCountListener* l);
377    
378                /**
379                 * Removes the specified listener.
380                 */
381                void RemoveStreamCountListener(StreamCountListener* l);
382    
383                /**
384                 * Notifies listeners that the number of active disk streams
385                 * on the specified sampler channel is changed.
386                 * @param ChannelId The numerical ID of the sampler channel.
387                 * @param NewCount The new number of active disk streams.
388                 */
389                void fireStreamCountChanged(int ChannelId, int NewCount);
390    
391                /**
392                 * Registers the specified listener to be
393                 * notified when the fill state of the disk stream
394                 * buffers on a specific sampler channel is changed.
395                 */
396                void AddBufferFillListener(BufferFillListener* l);
397    
398                /**
399                 * Removes the specified listener.
400                 */
401                void RemoveBufferFillListener(BufferFillListener* l);
402    
403                /**
404                 * Notifies listeners that the fill state of the disk stream
405                 * buffers on the specified sampler channel is changed.
406                 * @param ChannelId The numerical ID of the sampler channel.
407                 * @param FillData The buffer fill data for the specified sampler channel.
408                 */
409                void fireBufferFillChanged(int ChannelId, String FillData);
410    
411                /**
412                 * Registers the specified listener to be notified
413                 * when total number of active voices is changed.
414                 */
415                void AddTotalVoiceCountListener(TotalVoiceCountListener* l);
416    
417                /**
418                 * Removes the specified listener.
419                 */
420                void RemoveTotalVoiceCountListener(TotalVoiceCountListener* l);
421    
422                /**
423                 * Notifies listeners that the total number of active voices is changed.
424                 * @param NewCount The new number of active voices.
425                 */
426                void fireTotalVoiceCountChanged(int NewCount);
427                
428                void AddTotalStreamCountListener(TotalStreamCountListener* l);
429                void RemoveTotalStreamCountListener(TotalStreamCountListener* l);
430                void fireTotalStreamCountChanged(int NewCount);
431    
432                /**
433                 * Registers the specified listener to be notified when the number
434                 * of effect sends on a particular sampler channel is changed.
435                 */
436                void AddFxSendCountListener(FxSendCountListener* l);
437    
438                /**
439                 * Removes the specified listener.
440                 */
441                void RemoveFxSendCountListener(FxSendCountListener* l);
442    
443                /**
444               * Returns the names of all available audio output drivers.               * Returns the names of all available audio output drivers.
445               */               */
446              std::vector<String> AvailableAudioOutputDrivers();              std::vector<String> AvailableAudioOutputDrivers();
447    
448              /**              /**
449                 * Returns the names of all available MIDI input drivers.
450                 */
451                std::vector<String> AvailableMidiInputDrivers();
452    
453                /**
454                 * Returns the names of all available sampler engine types.
455                 * @see SamplerChannel::SetEngineType()
456                 */
457                std::vector<String> AvailableEngineTypes();
458    
459                /**
460               * Create an audio output device.               * Create an audio output device.
461               *               *
462               * @param AudioDriver - name of the audio driver               * @param AudioDriver - name of the audio driver
# Line 341  namespace LinuxSampler { Line 516  namespace LinuxSampler {
516               */               */
517              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);
518    
519                 /**
520                 * Gets the current number of all active streams.
521                 * @returns The current number of all active streams.
522                 */
523                int GetDiskStreamCount();
524    
525              /**              /**
526               * Gets the current number of all active voices.               * Gets the current number of all active voices.
527               * @returns The current number of all active voices.               * @returns The current number of all active voices.
# Line 353  namespace LinuxSampler { Line 534  namespace LinuxSampler {
534               */               */
535              void Reset();              void Reset();
536    
537                /**
538                 * Advise the FPU to treat denormal floating point numbers as
539                 * zero, to avoid severe performance penalty when dealing with
540                 * such extreme floating point values.
541                 *
542                 * @returns @c true if FPU supports it, @c false otherwise
543                 */
544                static bool EnableDenormalsAreZeroMode();
545    
546                /**
547                 * Notifies listeners about the current number of voices,
548                 * streams and total voices, and the current fill state of
549                 * the disk stream buffers.
550                 */
551                void fireStatistics();
552    
553          protected:          protected:
554                /**
555                 * Notifies listeners that the number of sampler channels has been changed.
556                 * @param NewCount The new number of sampler channels.
557                 */
558                void fireChannelCountChanged(int NewCount);
559    
560                /**
561                 * Notifies listeners that the specified sampler channel has just
562                 * been added.
563                 * @param pChannel The new sampler channel.
564                 */
565                void fireChannelAdded(SamplerChannel* pChannel);
566    
567                /**
568                 * Notifies listeners that the specified sampler channel is
569                 * going to be removed soon.
570                 * @param pChannel sampler channel to be removed.
571                 */
572                void fireChannelToBeRemoved(SamplerChannel* pChannel);
573    
574                /**
575                 * Notifies listeners that the number of audio output devices has been changed.
576                 * @param NewCount The new number of audio output devices.
577                 */
578                void fireAudioDeviceCountChanged(int NewCount);
579    
580                /**
581                 * Notifies listeners that the number of MIDI input devices has been changed.
582                 * @param NewCount The new number of MIDI input devices.
583                 */
584                void fireMidiDeviceCountChanged(int NewCount);
585    
586                /**
587                 * Notifies listeners that the supplied MIDI input device is
588                 * going to be destroyed soon.
589                 * @param pDevice MIDI input device to be destroyed
590                 */
591                void fireMidiDeviceToBeDestroyed(MidiInputDevice* pDevice);
592    
593                /**
594                 * Notifies listeners that the supplied MIDI input device was
595                 * just created.
596                 * @param pDevice new MIDI input device
597                 */
598                void fireMidiDeviceCreated(MidiInputDevice* pDevice);
599    
600                /**
601                 * Notifies listeners that the number of effect sends
602                 * on a particular sampler channel is changed.
603                 * @param ChannelId The numerical ID of the sampler channel.
604                 * @param NewCount The new number of sampler channels.
605                 */
606                void fireFxSendCountChanged(int ChannelId, int NewCount);
607    
608              typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;              typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;
609              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;
610              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;
# Line 362  namespace LinuxSampler { Line 613  namespace LinuxSampler {
613              AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices              AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices
614              MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices              MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices
615    
616                // statistics cache
617                uint uiOldTotalVoiceCount;
618                uint uiOldTotalStreamCount;
619                std::map<uint, uint> mOldVoiceCounts;
620                std::map<uint, uint> mOldStreamCounts;
621    
622              friend class SamplerChannel;              friend class SamplerChannel;
623    
624            private:
625                ListenerList<ChannelCountListener*> llChannelCountListeners;
626                ListenerList<AudioDeviceCountListener*> llAudioDeviceCountListeners;
627                ListenerList<MidiDeviceCountListener*> llMidiDeviceCountListeners;
628                ListenerList<VoiceCountListener*> llVoiceCountListeners;
629                ListenerList<StreamCountListener*> llStreamCountListeners;
630                ListenerList<BufferFillListener*> llBufferFillListeners;
631                ListenerList<TotalStreamCountListener*> llTotalStreamCountListeners;
632                ListenerList<TotalVoiceCountListener*> llTotalVoiceCountListeners;
633                ListenerList<FxSendCountListener*> llFxSendCountListeners;
634    
635                class EventHandler : public EngineChangeListener, public FxSendCountListener {
636                    public:
637                        void SetSampler(Sampler* pSampler) { this->pSampler = pSampler; }
638    
639                        /**
640                         * Invoked when the engine type of the specified sampler
641                         * channel is going to be changed soon.
642                         * @param ChannelId The numerical ID of the sampler channel
643                         */
644                        virtual void EngineToBeChanged(int ChannelId);
645    
646                        /**
647                         * Invoked when the engine type of the
648                         * specified sampler channel is changed.
649                         * @param ChannelId The numerical ID of the sampler
650                         * channel, which engine type has been changed.
651                         */
652                        virtual void EngineChanged(int ChannelId);
653    
654                        /**
655                         * Invoked when the number of effect sends
656                         * on the specified sampler channel has changed.
657                         * @param ChannelId The numerical ID of the sampler channel.
658                         * @param NewCount The new number of effect sends.
659                         */
660                        virtual void FxSendCountChanged(int ChannelId, int NewCount);
661    
662                    private:
663                        Sampler* pSampler;
664                } eventHandler;
665      };      };
666  }  }
667    
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