/[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 1789 - (show annotations) (download) (as text)
Sat Nov 1 19:01:27 2008 UTC (10 years, 9 months ago) by iliev
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File size: 11550 byte(s)
* notification events for stream/voice count statistics are now sent
  only when there are actual changes
* use atomic_t for stream/voice count statistics

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005-2008 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/Condition.h"
37 #include "../../common/ConditionServer.h"
38 #include "../Engine.h"
39 #include "../common/Event.h"
40 #include "../../network/lscp.h"
41 #include "EngineChannel.h"
42
43 // identifier of this sampler engine
44 #define LS_GIG_ENGINE_NAME "GIG"
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 void SuspendAll();
65 void ResumeAll();
66 void Suspend(::gig::Region* pRegion);
67 void Resume(::gig::Region* pRegion);
68
69 // implementation of abstract methods derived from class 'LinuxSampler::Engine'
70 virtual int RenderAudio(uint Samples);
71 virtual void SendSysex(void* pData, uint Size, MidiInputPort* pSender);
72 virtual void Reset();
73 virtual void Enable();
74 virtual void Disable();
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 InstrumentManager* GetInstrumentManager();
86
87 void SetVoiceCount(uint Count);
88
89 // Simple array wrapper just to make sure memory is freed
90 // when liblinuxsampler is unloaded
91 class FloatTable {
92 private:
93 const float* array;
94 public:
95 FloatTable(const float* array) : array(array) { }
96 ~FloatTable() { delete[] array; }
97 const float& operator[](int i) const { return array[i]; }
98 };
99
100 static const FloatTable VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.
101 static const FloatTable PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).
102 static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.
103
104 //protected:
105 static InstrumentResourceManager instruments;
106
107 AudioOutputDevice* pAudioOutputDevice;
108 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
109 uint MaxSamplesPerCycle; ///< Size of each audio output buffer
110 DiskThread* pDiskThread;
111 RingBuffer<Event,false>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
112 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
113 EventGenerator* pEventGenerator;
114 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
115 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
116 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
117 RingBuffer<uint8_t,false>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
118 int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation)
119 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
120 int VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit.
121 RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.
122 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.
123 EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
124 RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally
125 RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally
126 bool SuspensionRequested;
127 ConditionServer EngineDisabled;
128 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
129 int MinFadeOutSamples; ///< The number of samples needed to make an instant fade out (e.g. for voice stealing) without leading to clicks.
130 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
131 Mutex ResetInternalMutex; ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads).
132 Pool< ::gig::DimensionRegion*>* pDimRegionPool[2]; ///< Double buffered pool, used by the engine channels to keep track of dimension regions in use.
133
134 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
135 void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
136 void RenderStolenVoices(uint Samples);
137 void RouteAudio(EngineChannel* pEngineChannel, uint Samples);
138 void PostProcess(EngineChannel* pEngineChannel);
139 void ClearEventLists();
140 void ImportEvents(uint Samples);
141 void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
142 void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
143 void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
144 void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
145 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
146 void ProcessSuspensionsChanges();
147 void ProcessPendingStreamDeletions();
148 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts);
149 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
150 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
151 void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
152 void ResetInternal();
153 void ResetScaleTuning();
154 void ResetSuspendedRegions();
155
156 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
157 static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
158
159 void DisableAndLock(); // FIXME: should at least be protected
160
161 friend class Voice;
162 private:
163 Pool< ::gig::Region*> SuspendedRegions;
164 Mutex SuspendedRegionsMutex;
165 Condition SuspensionChangeOngoing;
166 ::gig::Region* pPendingRegionSuspension;
167 ::gig::Region* pPendingRegionResumption;
168 int iPendingStreamDeletions;
169
170 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
171
172 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
173
174 int SostenutoKeys[128];
175 int SostenutoKeyCount;
176
177 uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize);
178 void AdjustScale(int8_t ScaleTunes[12]);
179 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
180 void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
181 bool ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key);
182 bool RegionSuspended(::gig::Region* pRegion);
183 static float* InitVolumeCurve();
184 static float* InitPanCurve();
185 static float* InitCrossfadeCurve();
186 static float* InitCurve(const float* segments, int size = 128);
187
188 unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
189
190 atomic_t ActiveVoiceCount; ///< number of currently active voices
191
192 };
193
194 }} // namespace LinuxSampler::gig
195
196 #endif // __LS_GIG_ENGINE_H__

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