/[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 473 - (show annotations) (download) (as text)
Thu Mar 17 20:13:08 2005 UTC (14 years, 11 months ago) by schoenebeck
File MIME type: text/x-c++hdr
File size: 9466 byte(s)
* fixed event leak (events sent to inactive keys were not freed)
* implemented MIDI channel mode messages "All Sound Off", "Reset All
  Controller", "All Notes Off" (fixes bug #5)

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 #if DEBUG_HEADERS
30 # warning Engine.h included
31 #endif // DEBUG_HEADERS
32
33 #include <map>
34
35 #include "EngineGlobals.h"
36 #include "../../common/RingBuffer.h"
37 #include "../../common/Pool.h"
38 #include "../../common/ArrayList.h"
39 #include "../../common/ConditionServer.h"
40 #include "../common/Engine.h"
41 #include "../common/Event.h"
42 #include "../common/BiquadFilter.h"
43 #include "../../lib/fileloader/libgig/gig.h"
44 #include "../../network/lscp.h"
45 #include "EngineChannel.h"
46
47 namespace LinuxSampler { namespace gig {
48
49 // just symbol prototyping
50 class Voice;
51 class DiskThread;
52 class InstrumentResourceManager;
53 class midi_key_info_t;
54 class EngineChannel;
55
56 /**
57 * Sampler engine for the Gigasampler format.
58 */
59 class Engine : public LinuxSampler::Engine {
60 public:
61 // methods
62 Engine();
63 ~Engine();
64 void Connect(AudioOutputDevice* pAudioOut);
65
66 // implementation of abstract methods derived from class 'LinuxSampler::Engine'
67 virtual int RenderAudio(uint Samples);
68 virtual void SendSysex(void* pData, uint Size);
69 virtual void Reset();
70 virtual void Enable();
71 virtual void Disable();
72 virtual uint VoiceCount();
73 virtual uint VoiceCountMax();
74 virtual bool DiskStreamSupported();
75 virtual uint DiskStreamCount();
76 virtual uint DiskStreamCountMax();
77 virtual String DiskStreamBufferFillBytes();
78 virtual String DiskStreamBufferFillPercentage();
79 virtual String Description();
80 virtual String Version();
81 virtual String EngineName();
82
83 //protected:
84 static InstrumentResourceManager instruments;
85
86 AudioOutputDevice* pAudioOutputDevice;
87 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
88 uint MaxSamplesPerCycle; ///< Size of each audio output buffer
89 DiskThread* pDiskThread;
90 RingBuffer<Event>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
91 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
92 EventGenerator* pEventGenerator;
93 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
94 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
95 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
96 RingBuffer<uint8_t>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
97 float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.
98 biquad_param_t* pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.
99 biquad_param_t* pMainFilterParameters; ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).
100 int ActiveVoiceCount; ///< number of currently active voices (this value will be returned for public calls)
101 int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation)
102 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
103 int VoiceTheftsLeft; ///< We only allow MAX_AUDIO_VOICES voices to be stolen per audio fragment, we use this variable to ensure this limit.
104 RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.
105 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.
106 EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
107 bool SuspensionRequested;
108 ConditionServer EngineDisabled;
109 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
110 int MaxFadeOutPos; ///< The last position in an audio fragment to allow an instant fade out (e.g. for voice stealing) without leading to clicks.
111 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
112
113 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
114 void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
115 void RenderStolenVoices(uint Samples);
116 void PostProcess(EngineChannel* pEngineChannel);
117 void ClearEventLists();
118 void ImportEvents(uint Samples);
119 void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
120 void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
121 void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
122 void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
123 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
124 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing);
125 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
126 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
127 void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
128 void ResetSynthesisParameters(Event::destination_t dst, float val);
129 void ResetInternal();
130
131 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
132 static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
133
134 void DisableAndLock(); // FIXME: should at least be protected
135
136 friend class Voice;
137 friend class EGADSR;
138 friend class EGDecay;
139 friend class VCAManipulator;
140 friend class VCFCManipulator;
141 friend class VCOManipulator;
142 private:
143 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
144
145 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
146
147 uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize);
148 void AdjustScale(int8_t ScaleTunes[12]);
149 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
150 void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
151 };
152
153 }} // namespace LinuxSampler::gig
154
155 #endif // __LS_GIG_ENGINE_H__

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