/[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 649 - (show annotations) (download) (as text)
Wed Jun 15 00:01:28 2005 UTC (12 years, 6 months ago) by schoenebeck
File MIME type: text/x-c++hdr
File size: 9796 byte(s)
* revised voice stealing (fixes crash caused by voice stealing)

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 RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally
107 RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally
108 bool SuspensionRequested;
109 ConditionServer EngineDisabled;
110 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
111 int MaxFadeOutPos; ///< The last position in an audio fragment to allow an instant fade out (e.g. for voice stealing) without leading to clicks.
112 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
113
114 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
115 void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
116 void RenderStolenVoices(uint Samples);
117 void PostProcess(EngineChannel* pEngineChannel);
118 void ClearEventLists();
119 void ImportEvents(uint Samples);
120 void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
121 void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
122 void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
123 void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
124 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
125 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing);
126 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
127 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
128 void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
129 void ResetSynthesisParameters(Event::destination_t dst, float val);
130 void ResetInternal();
131
132 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
133 static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
134
135 void DisableAndLock(); // FIXME: should at least be protected
136
137 friend class Voice;
138 friend class EGADSR;
139 friend class EGDecay;
140 friend class VCAManipulator;
141 friend class VCFCManipulator;
142 friend class VCOManipulator;
143 private:
144 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
145
146 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
147
148 uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize);
149 void AdjustScale(int8_t ScaleTunes[12]);
150 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
151 void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
152
153 unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
154 };
155
156 }} // namespace LinuxSampler::gig
157
158 #endif // __LS_GIG_ENGINE_H__

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