/[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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Thu May 19 19:25:14 2005 UTC (18 years, 10 months ago) by schoenebeck
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* All compile time options are now centrally alterable as arguments to the
  ./configure script. All options are C Macros beginning with CONFIG_
  prefix and will be placed into auto generated config.h file.

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 Christian Schoenebeck *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the Free Software *
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21 * MA 02111-1307 USA *
22 ***************************************************************************/
23
24 #ifndef __LS_GIG_ENGINE_H__
25 #define __LS_GIG_ENGINE_H__
26
27 #include "../../common/global.h"
28
29 #include <map>
30 #include <gig.h>
31
32 #include "EngineGlobals.h"
33 #include "../../common/RingBuffer.h"
34 #include "../../common/Pool.h"
35 #include "../../common/ArrayList.h"
36 #include "../../common/ConditionServer.h"
37 #include "../common/Engine.h"
38 #include "../common/Event.h"
39 #include "../common/BiquadFilter.h"
40 #include "../../network/lscp.h"
41 #include "EngineChannel.h"
42
43 // identifier of this sampler engine
44 #define LS_GIG_ENGINE_NAME "GigEngine"
45
46 namespace LinuxSampler { namespace gig {
47
48 // just symbol prototyping
49 class Voice;
50 class DiskThread;
51 class InstrumentResourceManager;
52 class midi_key_info_t;
53 class EngineChannel;
54
55 /**
56 * Sampler engine for the Gigasampler format.
57 */
58 class Engine : public LinuxSampler::Engine {
59 public:
60 // methods
61 Engine();
62 virtual ~Engine();
63 void Connect(AudioOutputDevice* pAudioOut);
64
65 // implementation of abstract methods derived from class 'LinuxSampler::Engine'
66 virtual int RenderAudio(uint Samples);
67 virtual void SendSysex(void* pData, uint Size);
68 virtual void Reset();
69 virtual void Enable();
70 virtual void Disable();
71 virtual uint VoiceCount();
72 virtual uint VoiceCountMax();
73 virtual bool DiskStreamSupported();
74 virtual uint DiskStreamCount();
75 virtual uint DiskStreamCountMax();
76 virtual String DiskStreamBufferFillBytes();
77 virtual String DiskStreamBufferFillPercentage();
78 virtual String Description();
79 virtual String Version();
80 virtual String EngineName();
81
82 //protected:
83 static InstrumentResourceManager instruments;
84
85 AudioOutputDevice* pAudioOutputDevice;
86 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
87 uint MaxSamplesPerCycle; ///< Size of each audio output buffer
88 DiskThread* pDiskThread;
89 RingBuffer<Event>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
90 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
91 EventGenerator* pEventGenerator;
92 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
93 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
94 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
95 RingBuffer<uint8_t>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
96 float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
97 biquad_param_t* pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.
98 biquad_param_t* pMainFilterParameters; ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).
99 int ActiveVoiceCount; ///< number of currently active voices (this value will be returned for public calls)
100 int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation)
101 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
102 int VoiceTheftsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be stolen per audio fragment, we use this variable to ensure this limit.
103 RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.
104 RTList<uint>::Iterator iuiLastStolenKey; ///< Only for voice stealing: key number of last key on which the last voice was theft in current audio fragment, NULL otherwise.
105 EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
106 bool SuspensionRequested;
107 ConditionServer EngineDisabled;
108 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
109 int MaxFadeOutPos; ///< The last position in an audio fragment to allow an instant fade out (e.g. for voice stealing) without leading to clicks.
110 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
111
112 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
113 void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
114 void RenderStolenVoices(uint Samples);
115 void PostProcess(EngineChannel* pEngineChannel);
116 void ClearEventLists();
117 void ImportEvents(uint Samples);
118 void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
119 void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
120 void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
121 void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
122 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
123 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing);
124 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
125 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
126 void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
127 void ResetSynthesisParameters(Event::destination_t dst, float val);
128 void ResetInternal();
129
130 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
131 static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
132
133 void DisableAndLock(); // FIXME: should at least be protected
134
135 friend class Voice;
136 friend class EGADSR;
137 friend class EGDecay;
138 friend class VCAManipulator;
139 friend class VCFCManipulator;
140 friend class VCOManipulator;
141 private:
142 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
143
144 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
145
146 uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize);
147 void AdjustScale(int8_t ScaleTunes[12]);
148 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
149 void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
150 };
151
152 }} // namespace LinuxSampler::gig
153
154 #endif // __LS_GIG_ENGINE_H__

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