/[svn]/linuxsampler/trunk/src/engines/sf2/Voice.h
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Contents of /linuxsampler/trunk/src/engines/sf2/Voice.h

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Revision 2015 - (show annotations) (download) (as text)
Sun Oct 25 22:22:52 2009 UTC (14 years, 5 months ago) by iliev
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File size: 5983 byte(s)
* Refactoring: moved the independent code from gig::Voice to base classes
* SoundFont format engine: implemented EG1 & EG2

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 - 2009 Christian Schoenebeck *
7 * Copyright (C) 2009 Grigor Iliev *
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17 * GNU General Public License for more details. *
18 * *
19 * You should have received a copy of the GNU General Public License *
20 * along with this program; if not, write to the Free Software *
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22 * MA 02111-1307 USA *
23 ***************************************************************************/
24
25 #ifndef __LS_SF2_VOICE_H__
26 #define __LS_SF2_VOICE_H__
27
28 #include "../../common/global_private.h"
29
30 #include "../../common/RTMath.h"
31 #include "../../common/Pool.h"
32 #include "../../drivers/audio/AudioOutputDevice.h"
33 #include "Stream.h"
34 #include "DiskThread.h"
35 #include "../gig/Filter.h"
36 #include "../common/VoiceBase.h"
37 #include "../gig/SynthesisParam.h"
38
39 namespace LinuxSampler { namespace sf2 {
40 class Engine;
41 class EngineChannel;
42
43 /** SoundFont Voice
44 *
45 * Renders a voice for the SoundFont format.
46 */
47 class Voice : public LinuxSampler::VoiceBase<EngineChannel, ::sf2::Region, ::sf2::Sample, DiskThread> {
48 public:
49 Voice();
50 virtual ~Voice();
51 void SetOutput(AudioOutputDevice* pAudioOutputDevice);
52 void SetEngine(LinuxSampler::Engine* pEngine);
53
54 protected:
55 virtual SampleInfo GetSampleInfo();
56 virtual RegionInfo GetRegionInfo();
57 virtual InstrumentInfo GetInstrumentInfo();
58 virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity);
59 virtual AbstractEngine* GetEngine() { return (AbstractEngine*)pEngine; }
60 virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity);
61 virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue);
62 virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity);
63 virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue);
64 virtual void InitLFO1();
65 virtual void InitLFO2();
66 virtual void InitLFO3();
67 virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity);
68 virtual float CalculateFinalCutoff(float cutoffBase);
69 virtual uint8_t GetVCFCutoffCtrl();
70 virtual uint8_t GetVCFResonanceCtrl();
71 virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent);
72 virtual void ProcessCutoffEvent(RTList<Event>::Iterator& itEvent);
73 virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
74 virtual double GetVelocityRelease(uint8_t MIDIKeyVelocity);
75 virtual double GetSampleAttenuation();
76
77 private:
78 public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
79 // Attributes
80 Engine* pEngine; ///< Pointer to the sampler engine, to be able to access the event lists.
81 //uint LoopCyclesLeft; ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed
82
83 // Static Methods
84 static float CalculateFilterCutoffCoeff();
85
86 // Methods
87 void ProcessEvents(uint Samples);
88 void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
89
90 EngineChannel* GetSf2EngineChannel();
91
92 protected:
93 virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
94 /*uint8_t c = std::max(CrossfadeControllerValue, pRegion->AttenuationControllerThreshold);
95 c = (!pRegion->Crossfade.out_end) ? c // 0,0,0,0 means no crossfade defined
96 : (c < pRegion->Crossfade.in_end) ?
97 ((c <= pRegion->Crossfade.in_start) ? 0
98 : 127 * (c - pRegion->Crossfade.in_start) / (pRegion->Crossfade.in_end - pRegion->Crossfade.in_start))
99 : (c <= pRegion->Crossfade.out_start) ? 127
100 : (c < pRegion->Crossfade.out_end) ? 127 * (pRegion->Crossfade.out_end - c) / (pRegion->Crossfade.out_end - pRegion->Crossfade.out_start)
101 : 0;
102 return pRegion->InvertAttenuationController ? 127 - c : c;*/ // TODO: ^^^
103 return 0;
104 }
105 };
106
107 }} // namespace LinuxSampler::sf2
108
109 #endif // __LS_SF2_VOICE_H__

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