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

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Revision 2297 - (hide annotations) (download) (as text)
Fri Dec 9 15:04:55 2011 UTC (12 years, 3 months ago) by iliev
File MIME type: text/x-c++hdr
File size: 9047 byte(s)
* implemented opcodes delay, delay_onccN, delay_random,
  delay_samples, delay_samples_onccN

1 iliev 2012 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5     * Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6 persson 2072 * Copyright (C) 2005-2008 Christian Schoenebeck *
7     * Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev *
8 iliev 2012 * *
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_ABSTRACTENGINE_H__
26     #define __LS_ABSTRACTENGINE_H__
27    
28     #include "Engine.h"
29     #include "../common/ArrayList.h"
30     #include "../common/atomic.h"
31     #include "../common/ConditionServer.h"
32     #include "../common/Pool.h"
33     #include "../common/RingBuffer.h"
34     #include "../drivers/audio/AudioOutputDevice.h"
35     #include "common/Event.h"
36 iliev 2296 #include "common/SignalUnitRack.h"
37 iliev 2012
38     namespace LinuxSampler {
39    
40     class AbstractEngineChannel;
41    
42     class AbstractEngine: public Engine {
43    
44     public:
45     enum Format { GIG = 1, SF2, SFZ };
46     static String GetFormatString(Format f);
47     static AbstractEngine* AcquireEngine(AbstractEngineChannel* pChannel, AudioOutputDevice* pDevice);
48     static void FreeEngine(AbstractEngineChannel* pChannel, AudioOutputDevice* pDevice);
49    
50     AbstractEngine();
51     virtual ~AbstractEngine();
52    
53     // implementation of abstract methods derived from class 'LinuxSampler::Engine'
54     virtual void SendSysex(void* pData, uint Size, MidiInputPort* pSender);
55     virtual void Reset();
56     virtual void Enable();
57     virtual void Disable();
58     virtual uint VoiceCount();
59     virtual uint VoiceCountMax();
60     virtual String EngineName();
61    
62     virtual Format GetEngineFormat() = 0;
63     virtual void Connect(AudioOutputDevice* pAudioOut) = 0;
64     virtual void DisableAndLock();
65    
66     void SetVoiceCount(uint Count);// Simple array wrapper just to make sure memory is freed
67     // when liblinuxsampler is unloaded
68 iliev 2297
69     float Random() {
70     RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
71     return RandomSeed / 4294967296.0f;
72     }
73 iliev 2296
74 iliev 2012 class FloatTable {
75     private:
76     const float* array;
77     public:
78     FloatTable(const float* array) : array(array) { }
79     ~FloatTable() { delete[] array; }
80     const float& operator[](int i) const { return array[i]; }
81     };
82    
83     static const FloatTable VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.
84     static const FloatTable PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).
85     static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.
86    
87     AudioOutputDevice* pAudioOutputDevice;
88 schoenebeck 2121
89     //TODO: should be protected
90     AudioChannel* pDedicatedVoiceChannelLeft; ///< encapsulates a special audio rendering buffer (left) for rendering and routing audio on a per voice basis (this is a very special case and only used for voices which lie on a note which was set with individual, dedicated FX send level)
91     AudioChannel* pDedicatedVoiceChannelRight; ///< encapsulates a special audio rendering buffer (right) for rendering and routing audio on a per voice basis (this is a very special case and only used for voices which lie on a note which was set with individual, dedicated FX send level)
92 iliev 2012
93 iliev 2015 friend class AbstractVoice;
94 iliev 2012 friend class AbstractEngineChannel;
95     template<class V, class R, class I> friend class EngineChannelBase;
96 iliev 2015 template<class EC, class R, class S, class D> friend class VoiceBase;
97 iliev 2012
98     protected:
99     ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a Engine instance.
100     ConditionServer EngineDisabled;
101     int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
102     RingBuffer<Event,false>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
103     EventGenerator* pEventGenerator;
104     RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
105     Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
106 iliev 2027 RingBuffer<uint8_t,false>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
107 iliev 2012 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
108     uint MaxSamplesPerCycle; ///< Size of each audio output buffer
109 iliev 2027 unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
110 iliev 2012 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
111 iliev 2027 atomic_t ActiveVoiceCount; ///< number of currently active voices
112     int VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit.
113 iliev 2296 EqSupport* pEq; ///< Used for per voice equalization
114 iliev 2012
115     void RouteAudio(EngineChannel* pEngineChannel, uint Samples);
116 schoenebeck 2121 void RouteDedicatedVoiceChannels(EngineChannel* pEngineChannel, optional<float> FxSendLevels[2], uint Samples);
117 iliev 2012 void ClearEventLists();
118     void ImportEvents(uint Samples);
119     void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
120     void ResetScaleTuning();
121     void ProcessPitchbend(AbstractEngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
122    
123     void ProcessFxSendControllers (
124     AbstractEngineChannel* pEngineChannel,
125     Pool<Event>::Iterator& itControlChangeEvent
126     );
127    
128     uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize);
129    
130     virtual void ResetInternal() = 0;
131     virtual void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) = 0;
132     virtual void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) = 0;
133     virtual void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) = 0;
134     virtual void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) = 0;
135 iliev 2015 virtual int GetMinFadeOutSamples() = 0;
136 iliev 2012
137     private:
138     static std::map<Format, std::map<AudioOutputDevice*,AbstractEngine*> > engines;
139 persson 2072 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
140 iliev 2012
141     static float* InitVolumeCurve();
142     static float* InitPanCurve();
143     static float* InitCrossfadeCurve();
144     static float* InitCurve(const float* segments, int size = 128);
145    
146     void AdjustScale(int8_t ScaleTunes[12]);
147 schoenebeck 2121 bool RouteFxSend(FxSend* pFxSend, AudioChannel* ppSource[2], float FxSendLevel, uint Samples);
148 iliev 2012 };
149    
150     } // namespace LinuxSampler
151    
152     #endif /* __LS_ABSTRACTENGINE_H__ */
153    

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