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

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

Parent Directory Parent Directory | Revision Log Revision Log

Revision 1038 - (hide annotations) (download) (as text)
Sat Feb 3 15:33:00 2007 UTC (17 years, 2 months ago) by persson
File MIME type: text/x-c++hdr
File size: 11127 byte(s) 
* playback is no longer disabled during instrument loading
* all notes playing on a channel that changes its instrument keep
  playing with the old instrument until they get a note off command
* new thread safety fix for lscp "load engine" and "set channel audio
  output device"
1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 capela 1012 * Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6     * Copyright (C) 2005-2007 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 schoenebeck 890 #include "../Engine.h"
38 schoenebeck 53 #include "../common/Event.h"
39     #include "../../network/lscp.h"
40 schoenebeck 411 #include "EngineChannel.h"
41 schoenebeck 53
42 schoenebeck 475 // identifier of this sampler engine
43 schoenebeck 727 #define LS_GIG_ENGINE_NAME "GIG"
44 schoenebeck 475
45 schoenebeck 53 namespace LinuxSampler { namespace gig {
46    
47     // just symbol prototyping
48     class Voice;
49     class DiskThread;
50     class InstrumentResourceManager;
51 schoenebeck 411 class midi_key_info_t;
52     class EngineChannel;
53 schoenebeck 53
54     /**
55     * Sampler engine for the Gigasampler format.
56     */
57 schoenebeck 411 class Engine : public LinuxSampler::Engine {
58 persson 438 public:
59 schoenebeck 53 // methods
60     Engine();
61 letz 502 virtual ~Engine();
62 schoenebeck 411 void Connect(AudioOutputDevice* pAudioOut);
63 persson 1038 ::gig::DimensionRegion** ChangeInstrument(EngineChannel* pEngineChannel, ::gig::Instrument* pInstrument);
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 schoenebeck 947 virtual InstrumentManager* GetInstrumentManager();
82 persson 438
83 persson 832 static const float* VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.
84     static const float* PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).
85     static const float* CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.
86 persson 831
87 persson 438 //protected:
88 schoenebeck 411 static InstrumentResourceManager instruments;
89 schoenebeck 53
90     AudioOutputDevice* pAudioOutputDevice;
91 schoenebeck 225 uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz)
92     uint MaxSamplesPerCycle; ///< Size of each audio output buffer
93 persson 438 DiskThread* pDiskThread;
94 schoenebeck 970 RingBuffer<Event,false>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages).
95 persson 438 Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
96     EventGenerator* pEventGenerator;
97 schoenebeck 271 RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage.
98 schoenebeck 460 RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages).
99 schoenebeck 411 Pool<Event>* pEventPool; ///< Contains all Event objects that can be used.
100 schoenebeck 970 RingBuffer<uint8_t,false>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages.
101 schoenebeck 412 int ActiveVoiceCount; ///< number of currently active voices (this value will be returned for public calls)
102     int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation)
103 schoenebeck 53 int ActiveVoiceCountMax; ///< the maximum voice usage since application start
104 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.
105 schoenebeck 460 RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.
106     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.
107 schoenebeck 659 EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
108 schoenebeck 649 RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally
109     RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally
110 schoenebeck 53 bool SuspensionRequested;
111     ConditionServer EngineDisabled;
112 persson 438 int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
113 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.
114 persson 438 uint32_t RandomSeed; ///< State of the random number generator used by the random dimension.
115 persson 846 Mutex ResetInternalMutex; ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads).
116 schoenebeck 53
117 schoenebeck 460 void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
118     void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
119     void RenderStolenVoices(uint Samples);
120 schoenebeck 1001 void RouteAudio(EngineChannel* pEngineChannel, uint Samples);
121 schoenebeck 460 void PostProcess(EngineChannel* pEngineChannel);
122 persson 438 void ClearEventLists();
123 schoenebeck 460 void ImportEvents(uint Samples);
124 schoenebeck 411 void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
125     void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
126     void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
127     void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
128 schoenebeck 271 void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
129 schoenebeck 668 Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts);
130 schoenebeck 473 int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
131 schoenebeck 411 void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
132     void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
133 schoenebeck 53 void ResetInternal();
134 schoenebeck 659 void ResetScaleTuning();
135 schoenebeck 53
136 schoenebeck 411 static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
137     static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
138    
139     void DisableAndLock(); // FIXME: should at least be protected
140    
141 schoenebeck 53 friend class Voice;
142     private:
143 persson 1038
144     /// Command used by the instrument loader thread to
145     /// request an instrument change on a channel.
146     struct instrument_change_command_t {
147     EngineChannel* pEngineChannel;
148     ::gig::Instrument* pInstrument;
149     };
150     struct instrument_change_reply_t {
151     int dummy;
152     };
153     RingBuffer<instrument_change_command_t,false>* InstrumentChangeQueue; ///< Contains the instrument change command
154     RingBuffer<instrument_change_reply_t,false>* InstrumentChangeReplyQueue; ///< Contains the acknowledge of an instrument change
155     ::gig::DimensionRegion** pDimRegionsInUse; ///< After an instrument change, this contains a list of dimension regions that are still in use by playing voices
156    
157 schoenebeck 460 ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
158 persson 438
159 schoenebeck 411 static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
160 persson 438
161 iliev 776 int SostenutoKeys[128];
162     int SostenutoKeyCount;
163    
164 schoenebeck 970 uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize);
165 schoenebeck 244 void AdjustScale(int8_t ScaleTunes[12]);
166 schoenebeck 473 void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
167     void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
168 iliev 776 bool ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key);
169 persson 831 static float* InitVolumeCurve();
170     static float* InitPanCurve();
171 persson 832 static float* InitCrossfadeCurve();
172 persson 831 static float* InitCurve(const float* segments, int size = 128);
173 persson 630
174     unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
175 schoenebeck 53 };
176    
177     }} // namespace LinuxSampler::gig
178    
179     #endif // __LS_GIG_ENGINE_H__
  ViewVC Help
Powered by ViewVC