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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 - 2009 Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#ifndef __LS_SAMPLER_H__ |
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#define __LS_SAMPLER_H__ |
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|
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#include <vector> |
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#include <map> |
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#include "EventListeners.h" |
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#include "common/global.h" |
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#include "common/Exception.h" |
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#include "engines/EngineChannel.h" |
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#include "drivers/midi/MidiInputDevice.h" |
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#include "drivers/audio/AudioOutputDevice.h" |
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|
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namespace LinuxSampler { |
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|
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// just symbol prototyping |
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class Sampler; |
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|
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/** @brief LinuxSampler sampler channel |
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* |
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* Encapsulates a channel of a specific sampler engine type, one |
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* connection to a MIDI input device and one connection to an audio |
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* output device. You cannot create an instance of this class on your |
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* own, you have to use the AddSamplerChannel() method of the Sampler |
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* object to create a new sampler channel. |
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*/ |
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class SamplerChannel { |
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public: |
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/** |
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* Assign a sampler engine type to this sampler channel. |
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* |
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* @param EngineType - type of the engine to use |
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* @throws Exception - if \a EngineType is invalid |
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* @see Sampler::AvailableEngineTypes() |
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*/ |
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void SetEngineType(String EngineType) throw (Exception); |
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|
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/** |
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* Connect this sampler channel to an audio output device, that |
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* is an instance of an audio output driver. If this sampler |
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* channel was already connected to an audio output device, then |
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* the old connection will automatically be removed before. |
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* |
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* @param pDevice - audio output device to connect to |
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*/ |
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void SetAudioOutputDevice(AudioOutputDevice* pDevice); |
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|
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/** |
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* Connect this sampler channel to a MIDI input device. |
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* |
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* @param pDevice - MIDI input device to connect to |
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*/ |
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void SetMidiInputDevice(MidiInputDevice *pDevice); |
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|
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/** |
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* Connect this sampler channel to a MIDI input port. |
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* |
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* @param MidiPort - MIDI port to connect to |
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*/ |
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void SetMidiInputPort(int MidiPort); |
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|
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/** |
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* Define on which MIDI channel(s) this sampler channel should |
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* listen to. By default, that is after creation of a new |
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* sampler channel, the sampler channel will listen to all MIDI |
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* channels. |
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* |
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* @param MidiChannel - MIDI channel to listen |
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*/ |
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void SetMidiInputChannel(midi_chan_t MidiChannel); |
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|
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/** |
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* Connect this sampler channel to a MIDI input triplet. |
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* |
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* @param pDevice - MIDI input device to connect to |
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* @param iMidiPort - MIDI port to connect to |
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* @param MidiChannel - optional: MIDI channel on which the |
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* sampler channel should listen to |
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* (default: listen on all MIDI channels) |
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*/ |
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void SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel = midi_chan_all); |
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|
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/** |
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* Returns the EngineChannel object that was deployed on this |
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* sampler channel appropriate to the given sampler engine type. |
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* |
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* @returns pointer to engine or NULL if no engine deployed |
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*/ |
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EngineChannel* GetEngineChannel(); |
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|
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/** |
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* Returns the MIDI input channel to which this sampler |
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* channel is currently connected to. |
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* |
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* @returns The MIDI input channel on which the sampler |
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* channel is listening to. |
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*/ |
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midi_chan_t GetMidiInputChannel(); |
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|
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/** |
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* Returns the MIDI input port number to which this sampler |
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* channel is currently connected to. |
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* |
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* @returns MIDI input port number or -1 if not connected |
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*/ |
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int GetMidiInputPort(); |
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|
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/** |
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* Returns the audio output device to which this sampler channel |
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* is currently connected to. |
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* |
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* @returns pointer to audio output device or NULL if not |
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* connected |
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*/ |
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AudioOutputDevice* GetAudioOutputDevice(); |
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|
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/** |
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* Returns the MIDI input device to which this sampler channel |
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* is currently connected to. |
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* |
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* @returns pointer to MIDI input device or NULL if not |
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* connected |
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*/ |
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MidiInputDevice* GetMidiInputDevice(); |
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|
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/** |
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* Returns the index number of this sampler channel within the |
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* Sampler instance. |
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*/ |
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uint Index(); |
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|
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/** Returns the sampler to which this channel belongs */ |
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Sampler* GetSampler(); |
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|
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/////////////////////////////////////////////////////////////// |
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// Event Listener methods |
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|
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/** |
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* Registers the specified listener to be notified |
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* when the engine type of this sampler channel is changed. |
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*/ |
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void AddEngineChangeListener(EngineChangeListener* l); |
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|
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/** |
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* Removes the specified listener. |
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*/ |
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void RemoveEngineChangeListener(EngineChangeListener* l); |
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|
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/** |
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* Removes the specified listener. |
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*/ |
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void RemoveAllEngineChangeListeners(); |
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|
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/** |
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* Notifies listeners that the engine type of this sampler |
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* channel is going to be changed soon. |
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*/ |
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void fireEngineToBeChanged(); |
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|
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/** |
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* Notifies listeners that the engine |
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* type of this sampler channel is changed. |
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*/ |
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void fireEngineChanged(); |
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|
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|
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protected: |
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SamplerChannel(Sampler* pS); |
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virtual ~SamplerChannel(); |
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|
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/** Getting MIDI input device port given its index number. */ |
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MidiInputPort* __GetMidiInputDevicePort(int iMidiPort); |
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|
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Sampler* pSampler; |
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EngineChannel* pEngineChannel; |
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AudioOutputDevice* pAudioOutputDevice; |
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MidiInputDevice* pMidiInputDevice; |
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int iIndex; |
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|
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friend class Sampler; |
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private: |
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int iMidiPort; ///< Don't access directly, read GetMidiInputPort() instead ! |
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midi_chan_t midiChannel; ///< Don't access directly, read GetMidiInputChannel() instead ! |
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ListenerList<EngineChangeListener*> llEngineChangeListeners; |
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}; |
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|
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/** @brief LinuxSampler main class |
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* |
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* This is the toplevel class for a LinuxSampler instance. |
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* |
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* LinuxSampler can have arbitrary numbers of sampler channels. Each |
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* sampler channel can individually be deployed with it's own sampler |
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* engine, connected to an arbitrary MIDI input device and connected to |
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* an arbitrary audio output device. Here an example setup: |
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* @code |
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* S.Channel MIDI in S.Engine Audio out |
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* ------------------------------------------------------------------- |
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* 0 Alsa -> gig::Engine -> Jack |
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* 1 VSTi -> Akai::Engine -> VSTi |
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* 2 Jack -> DLS::Engine -> Jack |
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* 3 Jack -> SF::Engine -> Alsa |
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* |
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* ... (and so on) ... |
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* @endcode |
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* |
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* Note that not all audio and MIDI backends and sampler engines listed |
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* in the example above might already been implemented! |
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* |
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* As you can see in the example setup, LinuxSampler is capable to use |
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* several, different audio output and MIDI input systems |
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* simultaniously at the same time. Here the example setup shown in the |
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* aspect of MIDI input and audio output devices / drivers: |
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* @code |
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* ######################### ######################### |
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* # AudioOutputDeviceJack # # AudioOutputDeviceVSTi # |
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* ######################### ######################### |
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* ^ ^ ^ |
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* /------------>|Sampler Channel 0|-----/ | | |
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* | /--------->|Sampler Channel 1|---------------------/ |
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* | | /------>|Sampler Channel 2|---------/ |
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* | | | /--->|Sampler Channel 3|------------>######################### |
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* | | | | ... (and so on) ... # AudioOutputDeviceAlsa # |
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* | | | | ######################### |
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* | | | \-----------------------------------------------------\ |
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* | | \--------------------------------------------\ | |
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* | \--------------------\ | | |
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* | | | | |
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* ####################### ####################### ####################### |
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* # MidiInputDeviceAlsa # # MidiInputDeviceVSTi # # MidiInputDeviceJack # |
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* ####################### ####################### ####################### |
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* @endcode |
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* |
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* As you can see in this example setup, one device (that is midi input |
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* driver / audio output driver) can be connected multiple times to |
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* different sampler channels. |
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* |
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* It's even possible to create multiple instances of the same driver, for |
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* example multiple instances of the Alsa output driver to use multiple |
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* sound cards at the same time, or multiple instances of the JACK audio |
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* output driver to leverage SMP systems or boxes with several hard discs. |
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*/ |
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class Sampler { |
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public: |
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/** |
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* Constructor. Create a LinuxSampler instance. |
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*/ |
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Sampler(); |
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|
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/** |
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* Destructor. |
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*/ |
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virtual ~Sampler(); |
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|
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/** |
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* Returns the number of sampler channels currently allocated. |
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*/ |
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uint SamplerChannels(); |
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|
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/** |
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* Create and add a new sampler channel to this Sampler |
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* instance. For race condition reasons the new channel will use |
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* an index past the last already existing sampler channel |
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* index (in case the index limit was not reached yet, otherwise |
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* a free index starting from 0 is searched). |
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* |
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* @returns pointer to new sampler channel |
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*/ |
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SamplerChannel* AddSamplerChannel(); |
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|
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/** |
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* Returns the sampler channel of the given sampler channel |
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* index. |
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* |
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* @returns pointer to sought sampler channel |
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*/ |
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SamplerChannel* GetSamplerChannel(uint uiSamplerChannel); |
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|
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/** |
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* Returns all created sampler channels. |
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*/ |
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std::map<uint, SamplerChannel*> GetSamplerChannels(); |
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|
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/** |
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* Destroy and remove the given sampler channel from this |
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* Sampler instance. |
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* |
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* @param pSamplerChannel - pointer to sampler channel to remove |
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*/ |
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void RemoveSamplerChannel(SamplerChannel* pSamplerChannel); |
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|
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/** |
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* Destroy and remove the given sampler channel from this |
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* Sampler instance. |
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* |
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* @param uiSamplerChannel - index of the sampler channel to |
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* remove |
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*/ |
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void RemoveSamplerChannel(uint uiSamplerChannel); |
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|
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/** |
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* Destroy and remove all sampler channels from this |
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* Sampler instance. |
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*/ |
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void RemoveAllSamplerChannels(); |
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|
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/** |
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* Returns the names of all available audio output drivers. |
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*/ |
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std::vector<String> AvailableAudioOutputDrivers(); |
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|
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/** |
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* Returns the names of all available MIDI input drivers. |
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*/ |
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std::vector<String> AvailableMidiInputDrivers(); |
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|
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/** |
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* Returns the names of all available sampler engine types. |
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* @see SamplerChannel::SetEngineType() |
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*/ |
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std::vector<String> AvailableEngineTypes(); |
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|
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/** |
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* Create an audio output device. |
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* |
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* @param AudioDriver - name of the audio driver |
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* @param Parameters - eventually needed driver parameters to |
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* create the device |
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* @returns pointer to created audio output device |
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* @throws Exception if device could not be created |
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*/ |
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AudioOutputDevice* CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception); |
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|
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/** |
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* Create a midi input device. |
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* |
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* @param MidiDriver - name of the midi driver |
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* @param Parameters - eventually needed driver parameters to |
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* create the device |
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* @returns pointer to created midi input device |
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* @throws Exception if device could not be created |
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*/ |
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MidiInputDevice* CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception); |
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|
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/** |
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* Returns the number of all created audio output devices. |
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*/ |
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uint AudioOutputDevices(); |
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|
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/** |
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* Returns the number of all created MIDI input devices. |
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*/ |
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uint MidiInputDevices(); |
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|
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/** |
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* Returns all created audio output devices. |
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*/ |
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std::map<uint, AudioOutputDevice*> GetAudioOutputDevices(); |
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|
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/** |
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* Returns all created MIDI input devices. |
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*/ |
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std::map<uint, MidiInputDevice*> GetMidiInputDevices(); |
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|
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/** |
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* Destroy the given audio output device and takes care if there |
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* are still sampler engines connected to this device, etc. |
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* |
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* @throws Exception if sampler channels are still |
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* connected to the device |
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*/ |
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void DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception); |
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|
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/** |
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* Destroy all audio output devices and takes care if there |
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* are still sampler engines connected to devices, etc. |
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* |
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* Note: non-autonomous devices, that is devices associated with |
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* host plugin instances like VST, AU, DSSI, LV2 are not |
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* destroyed by this method. |
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* |
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* @throws Exception if sampler channels are still |
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* connected to device |
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*/ |
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void DestroyAllAudioOutputDevices() throw (Exception); |
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|
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/** |
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* Destroy the given MIDI input device and takes care if there |
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* are still sampler engines connected to this device, etc. |
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* |
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* @throws Exception if sampler channels are still |
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* connected to the device |
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*/ |
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void DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception); |
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|
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/** |
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* Destroy all MIDI input devices and take care if there |
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* are still sampler engines connected to device, etc. |
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* |
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* Note: non-autonomous devices, that is devices associated with |
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* host plugin instances like VST, AU, DSSI, LV2 are not |
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* destroyed by this method. |
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* |
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* @throws Exception if sampler channels are still |
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* connected to device |
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*/ |
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void DestroyAllMidiInputDevices() throw (Exception); |
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|
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/** |
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* Gets the current number of all active streams. |
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* @returns The current number of all active streams. |
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*/ |
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int GetDiskStreamCount(); |
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|
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/** |
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* Gets the current number of all active voices. |
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* @returns The current number of all active voices. |
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*/ |
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int GetVoiceCount(); |
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|
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/** |
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* Reset the whole sampler. Destroy all engines, sampler |
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* channels, MIDI input devices and audio output devices. |
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*/ |
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void Reset(); |
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|
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/////////////////////////////////////////////////////////////// |
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// Event Listener methods |
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|
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/** |
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* Registers the specified listener to be notified |
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* when the number of sampler chanels is changed. |
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*/ |
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void AddChannelCountListener(ChannelCountListener* l); |
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|
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/** |
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* Removes the specified listener. |
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*/ |
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void RemoveChannelCountListener(ChannelCountListener* l); |
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|
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/** |
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* Registers the specified listener to be notified |
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* when the number of audio output devices is changed. |
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*/ |
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void AddAudioDeviceCountListener(AudioDeviceCountListener* l); |
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|
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/** |
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* Removes the specified listener. |
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*/ |
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void RemoveAudioDeviceCountListener(AudioDeviceCountListener* l); |
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|
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/** |
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* Registers the specified listener to be notified |
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* when the number of MIDI input devices is changed. |
476 |
*/ |
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void AddMidiDeviceCountListener(MidiDeviceCountListener* l); |
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|
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/** |
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* Removes the specified listener. |
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*/ |
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void RemoveMidiDeviceCountListener(MidiDeviceCountListener* l); |
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|
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/** |
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* Registers the specified listener to be notified when the number |
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* of active voices in a particular sampler channel is changed. |
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*/ |
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void AddVoiceCountListener(VoiceCountListener* l); |
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|
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/** |
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* Removes the specified listener. |
492 |
*/ |
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void RemoveVoiceCountListener(VoiceCountListener* l); |
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|
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/** |
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* Notifies listeners that the number of active voices |
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* on the specified sampler channel is changed. |
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* @param ChannelId The numerical ID of the sampler channel. |
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* @param NewCount The new number of active voices. |
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*/ |
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void fireVoiceCountChanged(int ChannelId, int NewCount); |
502 |
|
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/** |
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* Registers the specified listener to be notified when the number |
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* of active disk streams in a particular sampler channel is changed. |
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*/ |
507 |
void AddStreamCountListener(StreamCountListener* l); |
508 |
|
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/** |
510 |
* Removes the specified listener. |
511 |
*/ |
512 |
void RemoveStreamCountListener(StreamCountListener* l); |
513 |
|
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/** |
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* Notifies listeners that the number of active disk streams |
516 |
* on the specified sampler channel is changed. |
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* @param ChannelId The numerical ID of the sampler channel. |
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* @param NewCount The new number of active disk streams. |
519 |
*/ |
520 |
void fireStreamCountChanged(int ChannelId, int NewCount); |
521 |
|
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/** |
523 |
* Registers the specified listener to be |
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* notified when the fill state of the disk stream |
525 |
* buffers on a specific sampler channel is changed. |
526 |
*/ |
527 |
void AddBufferFillListener(BufferFillListener* l); |
528 |
|
529 |
/** |
530 |
* Removes the specified listener. |
531 |
*/ |
532 |
void RemoveBufferFillListener(BufferFillListener* l); |
533 |
|
534 |
/** |
535 |
* Notifies listeners that the fill state of the disk stream |
536 |
* buffers on the specified sampler channel is changed. |
537 |
* @param ChannelId The numerical ID of the sampler channel. |
538 |
* @param FillData The buffer fill data for the specified sampler channel. |
539 |
*/ |
540 |
void fireBufferFillChanged(int ChannelId, String FillData); |
541 |
|
542 |
/** |
543 |
* Registers the specified listener to be notified |
544 |
* when total number of active voices is changed. |
545 |
*/ |
546 |
void AddTotalVoiceCountListener(TotalVoiceCountListener* l); |
547 |
|
548 |
/** |
549 |
* Removes the specified listener. |
550 |
*/ |
551 |
void RemoveTotalVoiceCountListener(TotalVoiceCountListener* l); |
552 |
|
553 |
/** |
554 |
* Notifies listeners that the total number of active voices is changed. |
555 |
* @param NewCount The new number of active voices. |
556 |
*/ |
557 |
void fireTotalVoiceCountChanged(int NewCount); |
558 |
|
559 |
/** |
560 |
* Registers the specified listener to be notified when the number |
561 |
* of total streams is changed. |
562 |
*/ |
563 |
void AddTotalStreamCountListener(TotalStreamCountListener* l); |
564 |
|
565 |
/** |
566 |
* Removes the specified listener. |
567 |
*/ |
568 |
void RemoveTotalStreamCountListener(TotalStreamCountListener* l); |
569 |
|
570 |
/** |
571 |
* Notifies listeners that the total number of total streams changed. |
572 |
* @param NewCount The new number of total streams. |
573 |
*/ |
574 |
void fireTotalStreamCountChanged(int NewCount); |
575 |
|
576 |
/** |
577 |
* Registers the specified listener to be notified when the number |
578 |
* of effect sends on a particular sampler channel is changed. |
579 |
*/ |
580 |
void AddFxSendCountListener(FxSendCountListener* l); |
581 |
|
582 |
/** |
583 |
* Removes the specified listener. |
584 |
*/ |
585 |
void RemoveFxSendCountListener(FxSendCountListener* l); |
586 |
|
587 |
/** |
588 |
* Notifies listeners about the current number of voices, |
589 |
* streams and total voices, and the current fill state of |
590 |
* the disk stream buffers. |
591 |
*/ |
592 |
void fireStatistics(); |
593 |
|
594 |
/////////////////////////////////////////////////////////////// |
595 |
// system specific methods |
596 |
|
597 |
/** |
598 |
* Advise the FPU to treat denormal floating point numbers as |
599 |
* zero, to avoid severe performance penalty when dealing with |
600 |
* such extreme floating point values. |
601 |
* |
602 |
* @returns @c true if FPU supports it, @c false otherwise |
603 |
*/ |
604 |
static bool EnableDenormalsAreZeroMode(); |
605 |
|
606 |
#if defined(WIN32) |
607 |
/** |
608 |
* Gets the directory where the liblinuxsampler dll is located. |
609 |
* Note: this method is currently only available for Windows. |
610 |
* @returns installation directory |
611 |
*/ |
612 |
static String GetInstallDir(); |
613 |
#endif |
614 |
protected: |
615 |
/** |
616 |
* Notifies listeners that the number of sampler channels has been changed. |
617 |
* @param NewCount The new number of sampler channels. |
618 |
*/ |
619 |
void fireChannelCountChanged(int NewCount); |
620 |
|
621 |
/** |
622 |
* Notifies listeners that the specified sampler channel has just |
623 |
* been added. |
624 |
* @param pChannel The new sampler channel. |
625 |
*/ |
626 |
void fireChannelAdded(SamplerChannel* pChannel); |
627 |
|
628 |
/** |
629 |
* Notifies listeners that the specified sampler channel is |
630 |
* going to be removed soon. |
631 |
* @param pChannel sampler channel to be removed. |
632 |
*/ |
633 |
void fireChannelToBeRemoved(SamplerChannel* pChannel); |
634 |
|
635 |
/** |
636 |
* Notifies listeners that the number of audio output devices has been changed. |
637 |
* @param NewCount The new number of audio output devices. |
638 |
*/ |
639 |
void fireAudioDeviceCountChanged(int NewCount); |
640 |
|
641 |
/** |
642 |
* Notifies listeners that the number of MIDI input devices has been changed. |
643 |
* @param NewCount The new number of MIDI input devices. |
644 |
*/ |
645 |
void fireMidiDeviceCountChanged(int NewCount); |
646 |
|
647 |
/** |
648 |
* Notifies listeners that the supplied MIDI input device is |
649 |
* going to be destroyed soon. |
650 |
* @param pDevice MIDI input device to be destroyed |
651 |
*/ |
652 |
void fireMidiDeviceToBeDestroyed(MidiInputDevice* pDevice); |
653 |
|
654 |
/** |
655 |
* Notifies listeners that the supplied MIDI input device was |
656 |
* just created. |
657 |
* @param pDevice new MIDI input device |
658 |
*/ |
659 |
void fireMidiDeviceCreated(MidiInputDevice* pDevice); |
660 |
|
661 |
/** |
662 |
* Notifies listeners that the number of effect sends |
663 |
* on a particular sampler channel is changed. |
664 |
* @param ChannelId The numerical ID of the sampler channel. |
665 |
* @param NewCount The new number of sampler channels. |
666 |
*/ |
667 |
void fireFxSendCountChanged(int ChannelId, int NewCount); |
668 |
|
669 |
typedef std::map<uint, SamplerChannel*> SamplerChannelMap; |
670 |
|
671 |
SamplerChannelMap mSamplerChannels; ///< contains all created sampler channels |
672 |
|
673 |
// statistics cache |
674 |
uint uiOldTotalVoiceCount; |
675 |
uint uiOldTotalStreamCount; |
676 |
std::map<uint, uint> mOldVoiceCounts; |
677 |
std::map<uint, uint> mOldStreamCounts; |
678 |
|
679 |
friend class SamplerChannel; |
680 |
|
681 |
private: |
682 |
ListenerList<ChannelCountListener*> llChannelCountListeners; |
683 |
ListenerList<AudioDeviceCountListener*> llAudioDeviceCountListeners; |
684 |
ListenerList<MidiDeviceCountListener*> llMidiDeviceCountListeners; |
685 |
ListenerList<VoiceCountListener*> llVoiceCountListeners; |
686 |
ListenerList<StreamCountListener*> llStreamCountListeners; |
687 |
ListenerList<BufferFillListener*> llBufferFillListeners; |
688 |
ListenerList<TotalStreamCountListener*> llTotalStreamCountListeners; |
689 |
ListenerList<TotalVoiceCountListener*> llTotalVoiceCountListeners; |
690 |
ListenerList<FxSendCountListener*> llFxSendCountListeners; |
691 |
|
692 |
class EventHandler : public EngineChangeListener, public FxSendCountListener { |
693 |
public: |
694 |
void SetSampler(Sampler* pSampler) { this->pSampler = pSampler; } |
695 |
|
696 |
/** |
697 |
* Invoked when the engine type of the specified sampler |
698 |
* channel is going to be changed soon. |
699 |
* @param ChannelId The numerical ID of the sampler channel |
700 |
*/ |
701 |
virtual void EngineToBeChanged(int ChannelId); |
702 |
|
703 |
/** |
704 |
* Invoked when the engine type of the |
705 |
* specified sampler channel is changed. |
706 |
* @param ChannelId The numerical ID of the sampler |
707 |
* channel, which engine type has been changed. |
708 |
*/ |
709 |
virtual void EngineChanged(int ChannelId); |
710 |
|
711 |
/** |
712 |
* Invoked when the number of effect sends |
713 |
* on the specified sampler channel has changed. |
714 |
* @param ChannelId The numerical ID of the sampler channel. |
715 |
* @param NewCount The new number of effect sends. |
716 |
*/ |
717 |
virtual void FxSendCountChanged(int ChannelId, int NewCount); |
718 |
|
719 |
private: |
720 |
Sampler* pSampler; |
721 |
} eventHandler; |
722 |
}; |
723 |
} |
724 |
|
725 |
#endif // __LS_SAMPLER_H__ |