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

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Revision 133 - (show annotations) (download) (as text)
Fri Jun 18 14:29:02 2004 UTC (19 years, 9 months ago) by capela
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* Load Instrument patch applied; this patch makes the
  LOAD INSTRUMENT command to return immediately,
  almost/always with an OK response, while spawning
  the proper instrument file loading in the background.

* New INSTRUMENT_STATUS field on GET CHANNEL INFO result
  set; the instrument status value holds the load progress
  percentage if positive, otherwise a negative value is
  evidence of a load exception error.

* VERSION is now set to 0.2.

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 void Connect(AudioOutputDevice* pAudioOut);
73 virtual void DisconnectAudioOutputDevice();
74 virtual int RenderAudio(uint Samples);
75 virtual uint VoiceCount();
76 virtual uint VoiceCountMax();
77 virtual bool DiskStreamSupported();
78 virtual uint DiskStreamCount();
79 virtual uint DiskStreamCountMax();
80 virtual String DiskStreamBufferFillBytes();
81 virtual String DiskStreamBufferFillPercentage();
82 virtual String Description();
83 virtual String Version();
84 virtual String EngineName();
85 virtual String InstrumentFileName();
86 virtual int InstrumentIndex();
87 virtual int InstrumentStatus();
88
89 // abstract methods derived from interface class 'InstrumentConsumer'
90 virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg);
91 virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg);
92 protected:
93 struct midi_key_info_t {
94 RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.
95 bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed.
96 bool Active; ///< If the key contains active voices.
97 uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys
98 RTEList<Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
99 };
100
101 static InstrumentResourceManager Instruments;
102
103 AudioOutputDevice* pAudioOutputDevice;
104 DiskThread* pDiskThread;
105 uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
106 RingBuffer<Event>* pEventQueue; ///< Input event queue.
107 midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
108 RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
109 RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices.
110 RTELMemoryPool<Event>* pEventPool; ///< Contains all Event objects that can be used.
111 EventGenerator* pEventGenerator;
112 RTEList<Event>* pEvents; ///< All events for the current audio fragment.
113 RTEList<Event>* pCCEvents; ///< All control change events for the current audio fragment.
114 RTEList<Event>* pSynthesisEvents[Event::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
115 float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
116 biquad_param_t* pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.
117 biquad_param_t* pMainFilterParameters; ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).
118 RIFF::File* pRIFF;
119 ::gig::File* pGig;
120 ::gig::Instrument* pInstrument;
121 bool SustainPedal; ///< true if sustain pedal is down
122 double GlobalVolume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
123 int Pitch; ///< Current (absolute) MIDI pitch value.
124 int ActiveVoiceCount; ///< number of currently active voices
125 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
126 bool SuspensionRequested;
127 ConditionServer EngineDisabled;
128 String InstrumentFile;
129 int InstrumentIdx;
130 int InstrumentStat;
131
132 void ProcessNoteOn(Event* pNoteOnEvent);
133 void ProcessNoteOff(Event* pNoteOffEvent);
134 void ProcessPitchbend(Event* pPitchbendEvent);
135 void ProcessControlChange(Event* pControlChangeEvent);
136 void KillVoice(Voice* pVoice);
137 void ResetSynthesisParameters(Event::destination_t dst, float val);
138 void ResetInternal();
139
140 friend class Voice;
141 friend class EGADSR;
142 friend class EGDecay;
143 friend class VCAManipulator;
144 friend class VCFCManipulator;
145 friend class VCOManipulator;
146 friend class InstrumentResourceManager;
147 private:
148 void DisableAndLock();
149 };
150
151 }} // namespace LinuxSampler::gig
152
153 #endif // __LS_GIG_ENGINE_H__

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