engines/gig/Engine.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __LS_GIG_ENGINE_H__
#define __LS_GIG_ENGINE_H__

#include "../../common/global.h"

#if DEBUG_HEADERS
# warning Engine.h included
#endif // DEBUG_HEADERS

#include "../../common/RingBuffer.h"
#include "../../common/RTELMemoryPool.h"
#include "../../common/ConditionServer.h"
#include "../common/Engine.h"
#include "../common/Event.h"
#include "../common/BiquadFilter.h"
#include "../../lib/fileloader/libgig/gig.h"
#include "InstrumentResourceManager.h"
#include "../../network/lscp.h"

#define PITCHBEND_SEMITONES             12
#define MAX_AUDIO_VOICES                128

namespace LinuxSampler { namespace gig {

    // just symbol prototyping
    class Voice;
    class DiskThread;
    class InstrumentResourceManager;

    /**
     * Sampler engine for the Gigasampler format.
     */
    class gig::Engine : public LinuxSampler::Engine, public InstrumentConsumer {
        public:
            // methods
            Engine();
           ~Engine();

            // abstract methods derived from class 'LinuxSampler::Engine'
            virtual void   LoadInstrument(const char* FileName, uint Instrument);
            virtual void   Reset();
            virtual void   Enable();
            virtual void   Disable();
            virtual void   SendNoteOn(uint8_t Key, uint8_t Velocity);
            virtual void   SendNoteOff(uint8_t Key, uint8_t Velocity);
            virtual void   SendPitchbend(int Pitch);
            virtual void   SendControlChange(uint8_t Controller, uint8_t Value);
            virtual float  Volume();
            virtual void   Volume(float f);
            virtual uint   Channels();
            virtual void   Connect(AudioOutputDevice* pAudioOut);
            virtual void   DisconnectAudioOutputDevice();
            virtual void   SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel);
            virtual int    OutputChannel(uint EngineAudioChannel);
            virtual int    RenderAudio(uint Samples);
            virtual uint   VoiceCount();
            virtual uint   VoiceCountMax();
            virtual bool   DiskStreamSupported();
            virtual uint   DiskStreamCount();
            virtual uint   DiskStreamCountMax();
            virtual String DiskStreamBufferFillBytes();
            virtual String DiskStreamBufferFillPercentage();
            virtual String Description();
            virtual String Version();
            virtual String EngineName();
            virtual String InstrumentFileName();
            virtual int    InstrumentIndex();
            virtual int    InstrumentStatus();

            // abstract methods derived from interface class 'InstrumentConsumer'
            virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg);
            virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg);
        protected:
            struct midi_key_info_t {
                RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.
                bool            KeyPressed;    ///< Is true if the respective MIDI key is currently pressed.
                bool            Active;        ///< If the key contains active voices.
                uint*           pSelf;         ///< hack to allow fast deallocation of the key from the list of active keys
                RTEList<Event>* pEvents;       ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
            };

            static InstrumentResourceManager Instruments;

            AudioOutputDevice*      pAudioOutputDevice;
            float*                  pOutputLeft;           ///< Audio output channel buffer (left)
            float*                  pOutputRight;          ///< Audio output channel buffer (right)
            int                     AudioDeviceChannelLeft;  ///< audio device channel number to which the left channel is connected to
            int                     AudioDeviceChannelRight; ///< audio device channel number to which the right channel is connected to
            uint                    SampleRate;            ///< Sample rate of the engines output audio signal (in Hz)
            uint                    MaxSamplesPerCycle;    ///< Size of each audio output buffer
            DiskThread*             pDiskThread;
            uint8_t                 ControllerTable[128];  ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
            RingBuffer<Event>*      pEventQueue;           ///< Input event queue.
            midi_key_info_t         pMIDIKeyInfo[128];     ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
            RTELMemoryPool<Voice>*  pVoicePool;            ///< Contains all voices that can be activated.
            RTELMemoryPool<uint>*   pActiveKeys;           ///< Holds all keys in it's allocation list with active voices.
            RTELMemoryPool<Event>*  pEventPool;            ///< Contains all Event objects that can be used.
            EventGenerator*         pEventGenerator;
            RTEList<Event>*         pEvents;               ///< All events for the current audio fragment.
            RTEList<Event>*         pCCEvents;             ///< All control change events for the current audio fragment.
            RTEList<Event>*         pSynthesisEvents[Event::destination_count];     ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
            float*                  pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
            biquad_param_t*         pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.
            biquad_param_t*         pMainFilterParameters;  ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).
            RIFF::File*             pRIFF;
            ::gig::File*            pGig;
            ::gig::Instrument*      pInstrument;
            bool                    SustainPedal;          ///< true if sustain pedal is down
            double                  GlobalVolume;          ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
            int                     Pitch;                 ///< Current (absolute) MIDI pitch value.
            int                     ActiveVoiceCount;      ///< number of currently active voices
            int                     ActiveVoiceCountMax;   ///< the maximum voice usage since application start
            bool                    SuspensionRequested;
            ConditionServer         EngineDisabled;
            String                  InstrumentFile;
            int                     InstrumentIdx;
            int                     InstrumentStat;

            void ProcessNoteOn(Event* pNoteOnEvent);
            void ProcessNoteOff(Event* pNoteOffEvent);
            void ProcessPitchbend(Event* pPitchbendEvent);
            void ProcessControlChange(Event* pControlChangeEvent);
            void KillVoice(Voice* pVoice);
            void ResetSynthesisParameters(Event::destination_t dst, float val);
            void ResetInternal();

            friend class Voice;
            friend class EGADSR;
            friend class EGDecay;
            friend class VCAManipulator;
            friend class VCFCManipulator;
            friend class VCOManipulator;
            friend class InstrumentResourceManager;
        private:
            void DisableAndLock();
    };

}} // namespace LinuxSampler::gig

#endif // __LS_GIG_ENGINE_H__
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	* *
7	* This program is free software; you can redistribute it and/or modify *
8	* it under the terms of the GNU General Public License as published by *
9	* the Free Software Foundation; either version 2 of the License, or *
10	* (at your option) any later version. *
11	* *
12	* This program is distributed in the hope that it will be useful, *
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15	* GNU General Public License for more details. *
16	* *
17	* You should have received a copy of the GNU General Public License *
18	* along with this program; if not, write to the Free Software *
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20	* MA 02111-1307 USA *
21	***************************************************************************/
22
23	#ifndef __LS_GIG_ENGINE_H__
24	#define __LS_GIG_ENGINE_H__
25
26	#include "../../common/global.h"
27
28	#if DEBUG_HEADERS
29	# warning Engine.h included
30	#endif // DEBUG_HEADERS
31
32	#include "../../common/RingBuffer.h"
33	#include "../../common/RTELMemoryPool.h"
34	#include "../../common/ConditionServer.h"
35	#include "../common/Engine.h"
36	#include "../common/Event.h"
37	#include "../common/BiquadFilter.h"
38	#include "../../lib/fileloader/libgig/gig.h"
39	#include "InstrumentResourceManager.h"
40	#include "../../network/lscp.h"
41
42	#define PITCHBEND_SEMITONES 12
43	#define MAX_AUDIO_VOICES 128
44
45	namespace LinuxSampler { namespace gig {
46
47	// just symbol prototyping
48	class Voice;
49	class DiskThread;
50	class InstrumentResourceManager;
51
52	/**
53	* Sampler engine for the Gigasampler format.
54	*/
55	class gig::Engine : public LinuxSampler::Engine, public InstrumentConsumer {
56	public:
57	// methods
58	Engine();
59	~Engine();
60
61	// abstract methods derived from class 'LinuxSampler::Engine'
62	virtual void LoadInstrument(const char* FileName, uint Instrument);
63	virtual void Reset();
64	virtual void Enable();
65	virtual void Disable();
66	virtual void SendNoteOn(uint8_t Key, uint8_t Velocity);
67	virtual void SendNoteOff(uint8_t Key, uint8_t Velocity);
68	virtual void SendPitchbend(int Pitch);
69	virtual void SendControlChange(uint8_t Controller, uint8_t Value);
70	virtual float Volume();
71	virtual void Volume(float f);
72	virtual uint Channels();
73	virtual void Connect(AudioOutputDevice* pAudioOut);
74	virtual void DisconnectAudioOutputDevice();
75	virtual void SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel);
76	virtual int OutputChannel(uint EngineAudioChannel);
77	virtual int RenderAudio(uint Samples);
78	virtual uint VoiceCount();
79	virtual uint VoiceCountMax();
80	virtual bool DiskStreamSupported();
81	virtual uint DiskStreamCount();
82	virtual uint DiskStreamCountMax();
83	virtual String DiskStreamBufferFillBytes();
84	virtual String DiskStreamBufferFillPercentage();
85	virtual String Description();
86	virtual String Version();
87	virtual String EngineName();
88	virtual String InstrumentFileName();
89	virtual int InstrumentIndex();
90	virtual int InstrumentStatus();
91
92	// abstract methods derived from interface class 'InstrumentConsumer'
93	virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg);
94	virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg);
95	protected:
96	struct midi_key_info_t {
97	RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.
98	bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed.
99	bool Active; ///< If the key contains active voices.
100	uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys
101	RTEList<Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
102	};
103
104	static InstrumentResourceManager Instruments;
105
106	AudioOutputDevice* pAudioOutputDevice;
107	float* pOutputLeft; ///< Audio output channel buffer (left)
108	float* pOutputRight; ///< Audio output channel buffer (right)
109	int AudioDeviceChannelLeft; ///< audio device channel number to which the left channel is connected to
110	int AudioDeviceChannelRight; ///< audio device channel number to which the right channel is connected to
111	uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
112	uint MaxSamplesPerCycle; ///< Size of each audio output buffer
113	DiskThread* pDiskThread;
114	uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
115	RingBuffer<Event>* pEventQueue; ///< Input event queue.
116	midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
117	RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
118	RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices.
119	RTELMemoryPool<Event>* pEventPool; ///< Contains all Event objects that can be used.
120	EventGenerator* pEventGenerator;
121	RTEList<Event>* pEvents; ///< All events for the current audio fragment.
122	RTEList<Event>* pCCEvents; ///< All control change events for the current audio fragment.
123	RTEList<Event>* pSynthesisEvents[Event::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
124	float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
125	biquad_param_t* pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.
126	biquad_param_t* pMainFilterParameters; ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).
127	RIFF::File* pRIFF;
128	::gig::File* pGig;
129	::gig::Instrument* pInstrument;
130	bool SustainPedal; ///< true if sustain pedal is down
131	double GlobalVolume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
132	int Pitch; ///< Current (absolute) MIDI pitch value.
133	int ActiveVoiceCount; ///< number of currently active voices
134	int ActiveVoiceCountMax; ///< the maximum voice usage since application start
135	bool SuspensionRequested;
136	ConditionServer EngineDisabled;
137	String InstrumentFile;
138	int InstrumentIdx;
139	int InstrumentStat;
140
141	void ProcessNoteOn(Event* pNoteOnEvent);
142	void ProcessNoteOff(Event* pNoteOffEvent);
143	void ProcessPitchbend(Event* pPitchbendEvent);
144	void ProcessControlChange(Event* pControlChangeEvent);
145	void KillVoice(Voice* pVoice);
146	void ResetSynthesisParameters(Event::destination_t dst, float val);
147	void ResetInternal();
148
149	friend class Voice;
150	friend class EGADSR;
151	friend class EGDecay;
152	friend class VCAManipulator;
153	friend class VCFCManipulator;
154	friend class VCOManipulator;
155	friend class InstrumentResourceManager;
156	private:
157	void DisableAndLock();
158	};
159
160	}} // namespace LinuxSampler::gig
161
162	#endif // __LS_GIG_ENGINE_H__