/[svn]/linuxsampler/trunk/src/engines/gig/Engine.h
ViewVC logotype

Contents of /linuxsampler/trunk/src/engines/gig/Engine.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 832 - (show annotations) (download) (as text)
Sun Feb 5 10:24:05 2006 UTC (14 years ago) by persson
File MIME type: text/x-c++hdr
File size: 9882 byte(s)
* added smoothing of volume changes caused by control change messages
* fine tuning of the crossfade volume curve

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 "../../network/lscp.h"
40 #include "EngineChannel.h"
41
42 // identifier of this sampler engine
43 #define LS_GIG_ENGINE_NAME "GIG"
44
45 namespace LinuxSampler { namespace gig {
46
47 // just symbol prototyping
48 class Voice;
49 class DiskThread;
50 class InstrumentResourceManager;
51 class midi_key_info_t;
52 class EngineChannel;
53
54 /**
55 * Sampler engine for the Gigasampler format.
56 */
57 class Engine : public LinuxSampler::Engine {
58 public:
59 // methods
60 Engine();
61 virtual ~Engine();
62 void Connect(AudioOutputDevice* pAudioOut);
63
64 // implementation of abstract methods derived from class 'LinuxSampler::Engine'
65 virtual int RenderAudio(uint Samples);
66 virtual void SendSysex(void* pData, uint Size);
67 virtual void Reset();
68 virtual void Enable();
69 virtual void Disable();
70 virtual uint VoiceCount();
71 virtual uint VoiceCountMax();
72 virtual bool DiskStreamSupported();
73 virtual uint DiskStreamCount();
74 virtual uint DiskStreamCountMax();
75 virtual String DiskStreamBufferFillBytes();
76 virtual String DiskStreamBufferFillPercentage();
77 virtual String Description();
78 virtual String Version();
79 virtual String EngineName();
80
81 static const float* VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.
82 static const float* PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).
83 static const float* CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.
84
85 //protected:
86 static InstrumentResourceManager instruments;
87
88 AudioOutputDevice* pAudioOutputDevice;
89 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
90 uint MaxSamplesPerCycle; ///< Size of each audio output buffer
91 DiskThread* pDiskThread;
92 RingBuffer<Event>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
93 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
94 EventGenerator* pEventGenerator;
95 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
96 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
97 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
98 RingBuffer<uint8_t>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
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 VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned 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, bool HandleKeyGroupConflicts);
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 ResetInternal();
130 void ResetScaleTuning();
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 private:
139 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
140
141 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
142
143 int SostenutoKeys[128];
144 int SostenutoKeyCount;
145
146 uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize);
147 void AdjustScale(int8_t ScaleTunes[12]);
148 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
149 void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
150 bool ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key);
151 static float* InitVolumeCurve();
152 static float* InitPanCurve();
153 static float* InitCrossfadeCurve();
154 static float* InitCurve(const float* segments, int size = 128);
155
156 unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
157 };
158
159 }} // namespace LinuxSampler::gig
160
161 #endif // __LS_GIG_ENGINE_H__

  ViewVC Help
Powered by ViewVC