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

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Mon Jun 20 15:30:47 2005 UTC (15 years, 9 months ago) by schoenebeck
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* fixed a key group bug which caused undefined behavior in conjunction with
  stolen voices (this case was usually followed by a "killed voice
  survived" or "voice stealing didn't work out" error message)

1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 56 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 411 * Copyright (C) 2005 Christian Schoenebeck *
7 schoenebeck 53 * *
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 schoenebeck 239 #include <map>
30 schoenebeck 505 #include <gig.h>
31 schoenebeck 239
32 schoenebeck 411 #include "EngineGlobals.h"
33 schoenebeck 53 #include "../../common/RingBuffer.h"
34 schoenebeck 271 #include "../../common/Pool.h"
35 schoenebeck 460 #include "../../common/ArrayList.h"
36 schoenebeck 53 #include "../../common/ConditionServer.h"
37     #include "../common/Engine.h"
38     #include "../common/Event.h"
39 schoenebeck 80 #include "../common/BiquadFilter.h"
40 schoenebeck 53 #include "../../network/lscp.h"
41 schoenebeck 411 #include "EngineChannel.h"
42 schoenebeck 53
43 schoenebeck 475 // identifier of this sampler engine
44     #define LS_GIG_ENGINE_NAME "GigEngine"
45    
46 schoenebeck 53 namespace LinuxSampler { namespace gig {
47    
48     // just symbol prototyping
49     class Voice;
50     class DiskThread;
51     class InstrumentResourceManager;
52 schoenebeck 411 class midi_key_info_t;
53     class EngineChannel;
54 schoenebeck 53
55     /**
56     * Sampler engine for the Gigasampler format.
57     */
58 schoenebeck 411 class Engine : public LinuxSampler::Engine {
59 persson 438 public:
60 schoenebeck 53 // methods
61     Engine();
62 letz 502 virtual ~Engine();
63 schoenebeck 411 void Connect(AudioOutputDevice* pAudioOut);
64 schoenebeck 53
65 schoenebeck 411 // implementation of abstract methods derived from class 'LinuxSampler::Engine'
66 schoenebeck 412 virtual int RenderAudio(uint Samples);
67 schoenebeck 411 virtual void SendSysex(void* pData, uint Size);
68 schoenebeck 53 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 senkov 112 virtual String EngineName();
81 persson 438
82     //protected:
83 schoenebeck 411 static InstrumentResourceManager instruments;
84 schoenebeck 53
85     AudioOutputDevice* pAudioOutputDevice;
86 schoenebeck 225 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
87     uint MaxSamplesPerCycle; ///< Size of each audio output buffer
88 persson 438 DiskThread* pDiskThread;
89 schoenebeck 411 RingBuffer<Event>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
90 persson 438 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
91     EventGenerator* pEventGenerator;
92 schoenebeck 271 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
93 schoenebeck 460 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
94 schoenebeck 411 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
95     RingBuffer<uint8_t>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
96 schoenebeck 53 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 schoenebeck 80 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 schoenebeck 412 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 schoenebeck 53 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
102 schoenebeck 663 int VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit.
103 schoenebeck 460 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 schoenebeck 659 EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
106 schoenebeck 649 RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally
107     RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally
108 schoenebeck 53 bool SuspensionRequested;
109     ConditionServer EngineDisabled;
110 persson 438 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
111 schoenebeck 411 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 persson 438 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
113 schoenebeck 53
114 schoenebeck 460 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
115     void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
116     void RenderStolenVoices(uint Samples);
117     void PostProcess(EngineChannel* pEngineChannel);
118 persson 438 void ClearEventLists();
119 schoenebeck 460 void ImportEvents(uint Samples);
120 schoenebeck 411 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 schoenebeck 271 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
125 schoenebeck 668 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts);
126 schoenebeck 473 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
127 schoenebeck 411 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
128     void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
129 schoenebeck 53 void ResetSynthesisParameters(Event::destination_t dst, float val);
130     void ResetInternal();
131 schoenebeck 659 void ResetScaleTuning();
132 schoenebeck 53
133 schoenebeck 411 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
134     static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
135    
136     void DisableAndLock(); // FIXME: should at least be protected
137    
138 schoenebeck 53 friend class Voice;
139     friend class EGADSR;
140     friend class EGDecay;
141     friend class VCAManipulator;
142     friend class VCFCManipulator;
143 persson 438 friend class VCOManipulator;
144 schoenebeck 53 private:
145 schoenebeck 460 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
146 persson 438
147 schoenebeck 411 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
148 persson 438
149 schoenebeck 244 uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize);
150     void AdjustScale(int8_t ScaleTunes[12]);
151 schoenebeck 473 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
152     void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
153 persson 630
154     unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
155 schoenebeck 53 };
156    
157     }} // namespace LinuxSampler::gig
158    
159     #endif // __LS_GIG_ENGINE_H__

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