/[svn]/linuxsampler/trunk/src/engines/gig/Engine.h
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Annotation of /linuxsampler/trunk/src/engines/gig/Engine.h

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Tue Apr 27 09:21:58 2004 UTC (19 years, 11 months ago) by schoenebeck
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updated copyright header for 2004

1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 56 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 53 * *
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 "../../lib/fileloader/libgig/gig.h"
38     #include "InstrumentResourceManager.h"
39     #include "../../network/lscp.h"
40    
41     #define PITCHBEND_SEMITONES 12
42     #define MAX_AUDIO_VOICES 64
43    
44     namespace LinuxSampler { namespace gig {
45    
46     // just symbol prototyping
47     class Voice;
48     class DiskThread;
49     class InstrumentResourceManager;
50    
51     /**
52     * Sampler engine for the Gigasampler format.
53     */
54     class gig::Engine : public LinuxSampler::Engine, public InstrumentConsumer {
55     public:
56     // methods
57     Engine();
58     ~Engine();
59    
60     // abstract methods derived from class 'LinuxSampler::Engine'
61     virtual void LoadInstrument(const char* FileName, uint Instrument);
62     virtual void Reset();
63     virtual void Enable();
64     virtual void Disable();
65     virtual void SendNoteOn(uint8_t Key, uint8_t Velocity);
66     virtual void SendNoteOff(uint8_t Key, uint8_t Velocity);
67     virtual void SendPitchbend(int Pitch);
68     virtual void SendControlChange(uint8_t Controller, uint8_t Value);
69     virtual float Volume();
70     virtual void Volume(float f);
71     virtual void Connect(AudioOutputDevice* pAudioOut);
72     virtual void DisconnectAudioOutputDevice();
73     virtual int RenderAudio(uint Samples);
74     virtual uint VoiceCount();
75     virtual uint VoiceCountMax();
76     virtual bool DiskStreamSupported();
77     virtual uint DiskStreamCount();
78     virtual uint DiskStreamCountMax();
79     virtual String DiskStreamBufferFillBytes();
80     virtual String DiskStreamBufferFillPercentage();
81     virtual String Description();
82     virtual String Version();
83    
84     // abstract methods derived from interface class 'InstrumentConsumer'
85     virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg);
86     virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg);
87     protected:
88     struct midi_key_info_t {
89     RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.
90     bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed.
91     bool Active; ///< If the key contains active voices.
92     uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys
93     RTEList<Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
94     };
95    
96     static InstrumentResourceManager Instruments;
97    
98     AudioOutputDevice* pAudioOutputDevice;
99     DiskThread* pDiskThread;
100     uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
101     RingBuffer<Event>* pEventQueue; ///< Input event queue.
102     midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
103     RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
104     RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices.
105     RTELMemoryPool<Event>* pEventPool; ///< Contains all Event objects that can be used.
106     EventGenerator* pEventGenerator;
107     RTEList<Event>* pEvents; ///< All events for the current audio fragment.
108     RTEList<Event>* pCCEvents; ///< All control change events for the current audio fragment.
109     RTEList<Event>* pSynthesisEvents[Event::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
110     float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
111     RIFF::File* pRIFF;
112     ::gig::File* pGig;
113     ::gig::Instrument* pInstrument;
114     bool SustainPedal; ///< true if sustain pedal is down
115     double GlobalVolume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
116     int Pitch; ///< Current (absolute) MIDI pitch value.
117     int ActiveVoiceCount; ///< number of currently active voices
118     int ActiveVoiceCountMax; ///< the maximum voice usage since application start
119     bool SuspensionRequested;
120     ConditionServer EngineDisabled;
121    
122     void ProcessNoteOn(Event* pNoteOnEvent);
123     void ProcessNoteOff(Event* pNoteOffEvent);
124     void ProcessPitchbend(Event* pPitchbendEvent);
125     void ProcessControlChange(Event* pControlChangeEvent);
126     void KillVoice(Voice* pVoice);
127     void ResetSynthesisParameters(Event::destination_t dst, float val);
128     void ResetInternal();
129    
130     friend class Voice;
131     friend class EGADSR;
132     friend class EGDecay;
133     friend class VCAManipulator;
134     friend class VCFCManipulator;
135     friend class VCOManipulator;
136     friend class InstrumentResourceManager;
137     private:
138     //static void AllocateSynthesisParametersMatrix();
139    
140     void DisableAndLock();
141     };
142    
143     }} // namespace LinuxSampler::gig
144    
145     #endif // __LS_GIG_ENGINE_H__

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