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* * |
* * |
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* LinuxSampler - modular, streaming capable sampler * |
* LinuxSampler - modular, streaming capable sampler * |
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* * |
* * |
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* Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck * |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 - 2014 Christian Schoenebeck * |
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* * |
* * |
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* This program is free software; you can redistribute it and/or modify * |
* 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 * |
* it under the terms of the GNU General Public License as published by * |
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#define __LS_EVENT_H__ |
#define __LS_EVENT_H__ |
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#include "../../common/global.h" |
#include "../../common/global.h" |
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#include "../../common/RTMath.h" |
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#include "../EngineChannel.h" |
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namespace LinuxSampler { |
namespace LinuxSampler { |
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EventGenerator(uint SampleRate); |
EventGenerator(uint SampleRate); |
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void UpdateFragmentTime(uint SamplesToProcess); |
void UpdateFragmentTime(uint SamplesToProcess); |
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Event CreateEvent(); |
Event CreateEvent(); |
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Event CreateEvent(int32_t FragmentPos); |
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protected: |
protected: |
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typedef uint32_t time_stamp_t; ///< We read the processor's cycle count register as a reference for the real time. These are of course only abstract values with arbitrary time entity, but that's not a problem as we calculate relatively. |
typedef RTMath::time_stamp_t time_stamp_t; |
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inline uint ToFragmentPos(time_stamp_t TimeStamp) { |
inline int32_t ToFragmentPos(time_stamp_t TimeStamp) { |
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return uint ((TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio); |
return int32_t (int32_t(TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio); |
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} |
} |
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friend class Event; |
friend class Event; |
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private: |
private: |
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time_stamp_t end; ///< Real time stamp of the end of this audio fragment cycle. |
time_stamp_t end; ///< Real time stamp of the end of this audio fragment cycle. |
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float sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle) |
float sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle) |
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} FragmentTime; |
} FragmentTime; |
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time_stamp_t CreateTimeStamp(); |
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}; |
}; |
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/** |
/** |
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* Events are usually caused by a MIDI source or an internal modulation |
* Events are usually caused by a MIDI source or an internal modulation |
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* controller like LFO or EG. An event can only be created by an |
* controller like LFO or EG. An event should only be created by an |
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* EventGenerator. |
* EventGenerator! |
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* |
* |
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* @see EventGenerator |
* @see EventGenerator, ScriptEvent |
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*/ |
*/ |
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class Event { |
class Event { |
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public: |
public: |
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type_note_off, |
type_note_off, |
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type_pitchbend, |
type_pitchbend, |
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type_control_change, |
type_control_change, |
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type_sysex, ///< MIDI system exclusive message |
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type_cancel_release, ///< transformed either from a note-on or sustain-pedal-down event |
type_cancel_release, ///< transformed either from a note-on or sustain-pedal-down event |
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type_release ///< transformed either from a note-off or sustain-pedal-up event |
type_release, ///< transformed either from a note-off or sustain-pedal-up event |
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type_channel_pressure, ///< a.k.a. aftertouch |
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type_note_pressure, ///< polyphonic key pressure (aftertouch) |
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} Type; |
} Type; |
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enum destination_t { |
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destination_vca, ///< Volume level |
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destination_vco, ///< Pitch depth |
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destination_vcfc, ///< Filter curoff frequency |
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destination_vcfr, ///< Filter resonance |
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destination_count ///< Total number of modulation destinations (this has to stay the last element in the enum) |
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}; |
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union { |
union { |
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uint8_t Key; ///< MIDI key number for note-on and note-off events. |
/// Note-on and note-off event specifics |
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uint8_t Controller; ///< MIDI controller number for control change events. |
struct _Note { |
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}; |
uint8_t Channel; ///< MIDI channel (0..15) |
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uint8_t Key; ///< MIDI key number of note-on / note-off event. |
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uint8_t Velocity; ///< Trigger or release velocity of note-on / note-off event. |
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int8_t Layer; ///< Layer index (usually only used if a note-on event has to be postponed, e.g. due to shortage of free voices). |
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int8_t ReleaseTrigger; ///< If new voice should be a release triggered voice (actually boolean field and usually only used if a note-on event has to be postponed, e.g. due to shortage of free voices). |
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void* pRegion; ///< Engine specific pointer to instrument region |
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} Note; |
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/// Control change event specifics |
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struct _CC { |
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uint8_t Channel; ///< MIDI channel (0..15) |
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uint8_t Controller; ///< MIDI controller number of control change event. |
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uint8_t Value; ///< Controller Value of control change event. |
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} CC; |
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/// Pitchbend event specifics |
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struct _Pitch { |
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uint8_t Channel; ///< MIDI channel (0..15) |
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int16_t Pitch; ///< Pitch value of pitchbend event. |
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} Pitch; |
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/// MIDI system exclusive event specifics |
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struct _Sysex { |
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uint Size; ///< Data length (in bytes) of MIDI system exclusive message. |
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} Sysex; |
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/// Channel Pressure (aftertouch) event specifics |
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struct _ChannelPressure { |
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uint8_t Channel; ///< MIDI channel (0..15) |
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uint8_t Value; ///< New aftertouch / pressure value for keys on that channel. |
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} ChannelPressure; |
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/// Polyphonic Note Pressure (aftertouch) event specifics |
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struct _NotePressure { |
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uint8_t Channel; ///< MIDI channel (0..15) |
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uint8_t Key; ///< MIDI note number where key pressure (polyphonic aftertouch) changed. |
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uint8_t Value; ///< New pressure value for note. |
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} NotePressure; |
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} Param; |
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/// Sampler format specific informations and variables. |
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union { |
union { |
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uint8_t Velocity; ///< Trigger or release velocity for note-on or note-off events. |
/// Gigasampler/GigaStudio format specifics. |
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uint8_t Value; ///< Value for control change events. |
struct _Gig { |
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}; |
uint8_t DimMask; ///< May be used to override the Dimension zone to be selected for a new voice: each 1 bit means that respective bit shall be overridden by taking the respective bit from DimBits instead. |
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int16_t Pitch; ///< Pitch value for pitchbend events. |
uint8_t DimBits; ///< Used only in conjunction with DimMask: Dimension bits that shall be selected. |
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} Gig; |
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inline uint FragmentPos() { |
} Format; |
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if (iFragmentPos >= 0) return (uint) iFragmentPos; |
EngineChannel* pEngineChannel; ///< Pointer to the EngineChannel where this event occured on, NULL means Engine global event (e.g. SysEx message). |
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return (uint) (iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp)); |
MidiInputPort* pMidiInputPort; ///< Pointer to the MIDI input port on which this event occured (NOTE: currently only for global events, that is SysEx messages) |
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inline int32_t FragmentPos() { |
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if (iFragmentPos >= 0) return iFragmentPos; |
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iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp); |
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if (iFragmentPos < 0) iFragmentPos = 0; // if event arrived shortly before the beginning of current fragment |
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return iFragmentPos; |
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} |
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inline void ResetFragmentPos() { |
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iFragmentPos = -1; |
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} |
} |
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protected: |
protected: |
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typedef EventGenerator::time_stamp_t time_stamp_t; |
typedef EventGenerator::time_stamp_t time_stamp_t; |
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Event(EventGenerator* pGenerator, EventGenerator::time_stamp_t Time); |
Event(EventGenerator* pGenerator, EventGenerator::time_stamp_t Time); |
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Event(EventGenerator* pGenerator, int32_t FragmentPos); |
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friend class EventGenerator; |
friend class EventGenerator; |
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private: |
private: |
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EventGenerator* pEventGenerator; ///< Creator of the event. |
EventGenerator* pEventGenerator; ///< Creator of the event. |
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time_stamp_t TimeStamp; ///< Time stamp of the event's occurence. |
time_stamp_t TimeStamp; ///< Time stamp of the event's occurence. |
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int iFragmentPos; ///< Position in the current fragment this event refers to. |
int32_t iFragmentPos; ///< Position in the current fragment this event refers to. |
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}; |
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class VMEventHandler; |
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class VMExecContext; |
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/** @brief Real-time instrument script event. |
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* |
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* Encapsulates one execution instance of a real-time instrument script for |
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* exactly one script event handler (script event callback). |
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*/ |
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class ScriptEvent { |
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public: |
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Event cause; ///< Original external event that triggered this script event (i.e. MIDI note on event, MIDI CC event, etc.). |
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int id; ///< Unique ID of the external event that triggered this cript event. |
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VMEventHandler** handlers; ///< The script's event handlers (callbacks) to be processed (NULL terminated list). |
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VMExecContext* execCtx; ///< Script's current execution state (polyphonic variables and execution stack). |
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int currentHandler; ///< Current index in 'handlers' list above. |
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int executionSlices; ///< Amount of times this script event has been executed by the ScriptVM runner class. |
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}; |
}; |
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} // namespace LinuxSampler |
} // namespace LinuxSampler |