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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) 2005-2013 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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#ifndef __LS_ENGINE_H__ |
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#define __LS_ENGINE_H__ |
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#include "../common/global.h" |
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#include "InstrumentManager.h" |
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namespace LinuxSampler { |
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// just symbol prototyping |
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class MidiInputPort; |
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/** @brief LinuxSampler Sampler Engine Interface |
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* |
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* Abstract base interface class for all LinuxSampler engines which |
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* defines all mandatory methods which have to be implemented by all |
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* sampler engine implementations. |
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*/ |
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class Engine { |
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public: |
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///////////////////////////////////////////////////////////////// |
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// abstract methods |
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// (these have to be implemented by the descendant) |
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virtual int RenderAudio(uint Samples) = 0; |
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virtual void SendSysex(void* pData, uint Size, MidiInputPort* pSender) = 0; |
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virtual void Reset() = 0; |
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virtual void Enable() = 0; |
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virtual void Disable() = 0; |
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virtual uint VoiceCount() = 0; |
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virtual uint VoiceCountMax() = 0; |
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virtual int MaxVoices() = 0; |
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virtual void SetMaxVoices(int iVoices) throw (Exception) = 0; |
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virtual bool DiskStreamSupported() = 0; |
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virtual uint DiskStreamCount() = 0; |
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virtual uint DiskStreamCountMax() = 0; |
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virtual int MaxDiskStreams() = 0; |
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virtual void SetMaxDiskStreams(int iStreams) throw (Exception) = 0; |
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virtual String DiskStreamBufferFillBytes() = 0; |
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virtual String DiskStreamBufferFillPercentage() = 0; |
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virtual String Description() = 0; |
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virtual String Version() = 0; |
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virtual String EngineName() = 0; |
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/** |
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* Returns pointer to the Engine's InstrumentManager or NULL if |
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* the Engine does not provide an InstrumentManager. |
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* |
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* <b>Important:</b> All engine instances of the same engine |
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* type have to return the same InstrumentManager, that is all |
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* instances of the same engine type have to share one and |
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* the same InstrumentManager object. |
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*/ |
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virtual InstrumentManager* GetInstrumentManager() = 0; |
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/** |
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* Will be called by audio output drivers in case some |
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* fundamental audio driver parameter like sample rate or |
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* max. samples per cycle changed. |
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*/ |
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virtual void ReconnectAudioOutputDevice() = 0; |
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/** |
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* Modifies the scale tuning from standard well tempered chromatic |
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* scaling to any other kind of scaling. |
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* |
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* ScaleTunes - detune factors (-64..+63 cents) for all 12 |
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* semitones of an octave |
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*/ |
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virtual void AdjustScaleTuning(const int8_t ScaleTunes[12]) = 0; |
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/** |
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* Expects a byte array with 12 elements as argument @a pScaleTunes, |
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* where the currently effectve scale tuning setup is written to. |
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* |
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* pScaleTunes - output: detune factors (-64..+63 cents) for all 12 |
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* semitones of an octave |
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*/ |
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virtual void GetScaleTuning(int8_t* pScaleTunes) = 0; |
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/** |
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* Reset to standard well tempered chromatic scaling, i.e. after |
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* being altered with AdjustScaleTuning() or after having sent the |
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* respective standard scale tuning SysEx MIDI message. |
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*/ |
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virtual void ResetScaleTuning() = 0; |
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protected: |
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virtual ~Engine() {}; // MUST only be destroyed by EngineFactory |
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void Unregister(); // Remove self from EngineFactory. |
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friend class EngineFactory; |
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}; |
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} // namespace LinuxSampler |
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#endif // __LS_ENGINE_H__ |