/[svn]/linuxsampler/trunk/src/Sampler.h
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revision 900 by schoenebeck, Wed Jul 5 17:53:22 2006 UTC revision 1835 by iliev, Mon Feb 16 17:56:50 2009 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 150  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 167  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 283  namespace LinuxSampler { Line 317  namespace LinuxSampler {
317              void RemoveSamplerChannel(uint uiSamplerChannel);              void RemoveSamplerChannel(uint uiSamplerChannel);
318    
319              /**              /**
320                 * 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.               * Returns the names of all available audio output drivers.
451               */               */
452              std::vector<String> AvailableAudioOutputDrivers();              std::vector<String> AvailableAudioOutputDrivers();
# Line 342  namespace LinuxSampler { Line 506  namespace LinuxSampler {
506    
507              /**              /**
508               * Destroy the given audio output device and takes care if there               * Destroy the given audio output device and takes care if there
509               * are still sampler angines connected to this device, etc.               * are still sampler engines connected to this device, etc.
510               *               *
511               * @throws Exception  if sampler channels are still               * @throws Exception  if sampler channels are still
512               *                    connected to the device               *                    connected to the device
# Line 350  namespace LinuxSampler { Line 514  namespace LinuxSampler {
514              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception);              void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception);
515    
516              /**              /**
517                 * Destroy all audio output devices and takes care if there
518                 * are still sampler engines connected to devices, etc.
519                 *
520                 * @throws Exception  if sampler channels are still
521                 *                    connected to device
522                 */
523                void DestroyAllAudioOutputDevices() throw (Exception);
524    
525                /**
526               * Destroy the given MIDI input device and takes care if there               * Destroy the given MIDI input device and takes care if there
527               * are still sampler angines connected to this device, etc.               * are still sampler engines connected to this device, etc.
528               *               *
529               * @throws Exception  if sampler channels are still               * @throws Exception  if sampler channels are still
530               *                    connected to the device               *                    connected to the device
# Line 359  namespace LinuxSampler { Line 532  namespace LinuxSampler {
532              void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception);              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.               * Gets the current number of all active voices.
551               * @returns The current number of all active voices.               * @returns The current number of all active voices.
552               */               */
# Line 370  namespace LinuxSampler { Line 558  namespace LinuxSampler {
558               */               */
559              void Reset();              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                /**
579                 * 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                /**
585                 * Notifies listeners that the specified sampler channel has just
586                 * 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;              typedef std::map<uint, AudioOutputDevice*> AudioOutputDeviceMap;
633              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;              typedef std::map<uint, MidiInputDevice*> MidiInputDeviceMap;
634              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;              typedef std::map<uint, SamplerChannel*> SamplerChannelMap;
# Line 379  namespace LinuxSampler { Line 637  namespace LinuxSampler {
637              AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices              AudioOutputDeviceMap  mAudioOutputDevices; ///< contains all created audio output devices
638              MidiInputDeviceMap    mMidiInputDevices;   ///< contains all created MIDI input devices              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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