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/*************************************************************************** |
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* * |
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* Copyright (C) 2005, 2006 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_ENGINECHANNEL_H__ |
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#define __LS_ENGINECHANNEL_H__ |
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#include "../drivers/audio/AudioOutputDevice.h" |
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#include "../drivers/midi/midi.h" |
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#include "../drivers/midi/MidiInputDevice.h" |
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#include "../drivers/midi/MidiInputPort.h" |
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#include "Engine.h" |
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namespace LinuxSampler { |
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// just symbol prototyping |
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class AudioOutputDevice; |
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class MidiInputPort; |
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/** @brief Channel Interface for LinuxSampler Sampler Engines |
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* |
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* Every sampler engine can be used on several sampler channels and |
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* usually the same Engine instance is used on multiple sampler |
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* channels. For this every sampler engine must also implement a class |
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* which handles all channel dependant parameters and channel |
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* dependant execution code. |
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* |
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* This abstract base interface class defines all mandatory methods |
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* which have to be implemented by all engine channel implementations. |
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*/ |
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class EngineChannel { |
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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 void PrepareLoadInstrument(const char* FileName, uint Instrument) = 0; |
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virtual void LoadInstrument() = 0; |
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virtual void Reset() = 0; |
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virtual void SendNoteOn(uint8_t Key, uint8_t Velocity) = 0; |
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virtual void SendNoteOn(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) = 0; |
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virtual void SendNoteOff(uint8_t Key, uint8_t Velocity) = 0; |
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virtual void SendNoteOff(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) = 0; |
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virtual void SendPitchbend(int Pitch) = 0; |
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virtual void SendPitchbend(int Pitch, int32_t FragmentPos) = 0; |
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virtual void SendControlChange(uint8_t Controller, uint8_t Value) = 0; |
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virtual void SendControlChange(uint8_t Controller, uint8_t Value, int32_t FragmentPos) = 0; |
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virtual bool StatusChanged(bool bNewStatus = false) = 0; |
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virtual float Volume() = 0; |
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virtual void Volume(float f) = 0; |
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virtual uint Channels() = 0; |
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virtual void Connect(AudioOutputDevice* pAudioOut) = 0; |
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virtual void DisconnectAudioOutputDevice() = 0; |
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virtual void SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) = 0; |
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virtual int OutputChannel(uint EngineAudioChannel) = 0; |
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virtual void Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) = 0; |
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virtual void DisconnectMidiInputPort() = 0; |
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virtual MidiInputPort* GetMidiInputPort() = 0; |
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virtual midi_chan_t MidiChannel() = 0; |
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virtual String InstrumentFileName() = 0; |
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virtual String InstrumentName() = 0; |
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virtual int InstrumentIndex() = 0; |
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virtual int InstrumentStatus() = 0; |
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virtual Engine* GetEngine() = 0; |
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virtual String EngineName() = 0; |
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/** |
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* Sets the mute state of this channel. |
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* |
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* @param state - specifies the mute state of this sampler channel. |
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* @throws Exception - if state does not contain valid |
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* value. |
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*/ |
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void SetMute(int state) throw (Exception); |
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/** |
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* Determines whether this channel is muted. |
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* |
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* @returns 1 if the channel is muted, 0 if the channel is not muted |
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* and -1 if the channel is muted because of presence of at least |
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* one solo channel. |
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*/ |
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int GetMute(); |
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/** |
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* Sets the solo state of this channel. |
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* |
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* @param solo - specifies whether this is a solo channel. |
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*/ |
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void SetSolo(bool solo); |
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/** |
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* Determines whether this is a solo channel. |
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* |
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* @returns true if this is a solo channel, false otherwise. |
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*/ |
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bool GetSolo(); |
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/** |
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* Returns current MIDI program (change) number of this |
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* EngineChannel. |
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*/ |
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uint8_t GetMidiProgram(); |
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/** |
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* Change EngineChannel's MIDI program. |
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*/ |
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void SetMidiProgram(uint8_t Program); |
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/** |
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* Returns current MIDI bank MSB (coarse) number of this |
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* EngineChannel. |
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*/ |
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uint8_t GetMidiBankMsb(); |
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/** |
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* Change current MIDI bank MSB (coarse) number of this |
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* EngineChannel. |
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*/ |
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void SetMidiBankMsb(uint8_t BankMSB); |
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/** |
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* Returns current MIDI bank LSB (fine) number of this |
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* EngineChannel. |
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*/ |
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uint8_t GetMidiBankLsb(); |
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/** |
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* Change current MIDI bank LSB (fine) number of this |
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* EngineChannel. |
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*/ |
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void SetMidiBankLsb(uint8_t BankLSB); |
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/** |
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* Returns true if this EngineChannel is using no MIDI |
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* instrument map at all, that is if it will ignore all MIDI |
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* program change messages. |
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* |
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* @see UsesDefaultMidiInstrumentMap() |
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* @see GetMidiInstrumentMap() |
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*/ |
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bool UsesNoMidiInstrumentMap(); |
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/** |
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* Returns true if this EngineChannel is using the default MIDI |
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* instrument map for handling MIDI program changes. |
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* |
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* @see UsesNoMidiInstrumentMap() |
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* @see GetMidiInstrumentMap() |
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*/ |
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bool UsesDefaultMidiInstrumentMap(); |
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/** |
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* Returns ID of the MIDI instrument map currently used by this |
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* EngineChannel to handle MIDI program changes. You should |
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* always call @c UsesNoMidiInstrumentMap() and |
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* @c UsesDefaultMidiInstrumentMap() before calling this method |
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* to check if this EngineChannel is probably using the default |
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* map or no map at all, because in these two particular cases |
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* this method would throw an exception! |
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* |
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* @throws Exception - if EngineChannel is set to no map at all |
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* or is set to the default map |
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* @see UsesNoMidiInstrumentMap() |
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* @see UsesDefaultMidiInstrumentMap() |
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*/ |
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int GetMidiInstrumentMap() throw (Exception); |
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/** |
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* Let this EngineChannel use no MIDI instrument map at all, |
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* that is to let it ignore all MIDI program change messages. |
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* |
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* @see SetMidiInstrumentMapToDefault() |
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* @see SetMidiInstrumentMap() |
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*/ |
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void SetMidiInstrumentMapToNone(); |
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/** |
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* Let this EngineChannel use the default MIDI instrument map to |
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* handle MIDI program changes. |
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* |
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* @see SetMidiInstrumentMapToNone() |
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* @see SetMidiInstrumentMap() |
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*/ |
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void SetMidiInstrumentMapToDefault(); |
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/** |
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* Set a specific MIDI instrument map this EngineChannel should |
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* use to handle MIDI program changes. |
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* |
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* @see SetMidiInstrumentMapToNone() |
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* @see SetMidiInstrumentMapToDefault() |
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* |
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* @throws Exception - in case given map does not exist |
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*/ |
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void SetMidiInstrumentMap(int MidiMap) throw (Exception); |
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int iSamplerChannelIndex; ///< FIXME: nasty hack, might be removed (should be 'virtual EngineChannel* EngineChannel() = 0;', but due to cyclic dependencies only a void* solution would be possible ATM) |
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protected: |
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EngineChannel(); |
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virtual ~EngineChannel() {}; // MUST only be destroyed by EngineChannelFactory |
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friend class EngineChannelFactory; |
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private: |
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int iMute; |
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bool bSolo; |
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uint8_t uiMidiProgram; |
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uint8_t uiMidiBankMsb; |
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uint8_t uiMidiBankLsb; |
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bool bMidiBankMsbReceived; |
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bool bMidiBankLsbReceived; |
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bool bProgramChangeReceived; |
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int iMidiInstrumentMap; |
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}; |
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} // namespace LinuxSampler |
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#endif // __LS_ENGINECHANNEL_H__ |