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

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Revision 2410 - (show annotations) (download) (as text)
Sat Feb 2 18:52:15 2013 UTC (7 years, 2 months ago) by schoenebeck
File MIME type: text/x-c++hdr
File size: 4463 byte(s)
* Several fixes in JACK audio driver:
- React on sample rate changes.
- React on buffer size changes.
- jack_port_get_buffer() was cached and called
  outside RT context.

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005-2008 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_ENGINE_H__
25 #define __LS_ENGINE_H__
26
27 #include "../common/global.h"
28 #include "InstrumentManager.h"
29
30 namespace LinuxSampler {
31
32 // just symbol prototyping
33 class MidiInputPort;
34
35 /** @brief LinuxSampler Sampler Engine Interface
36 *
37 * Abstract base interface class for all LinuxSampler engines which
38 * defines all mandatory methods which have to be implemented by all
39 * sampler engine implementations.
40 */
41 class Engine {
42 public:
43
44 /////////////////////////////////////////////////////////////////
45 // abstract methods
46 // (these have to be implemented by the descendant)
47
48 virtual int RenderAudio(uint Samples) = 0;
49 virtual void SendSysex(void* pData, uint Size, MidiInputPort* pSender) = 0;
50 virtual void Reset() = 0;
51 virtual void Enable() = 0;
52 virtual void Disable() = 0;
53 virtual uint VoiceCount() = 0;
54 virtual uint VoiceCountMax() = 0;
55 virtual int MaxVoices() = 0;
56 virtual void SetMaxVoices(int iVoices) throw (Exception) = 0;
57 virtual bool DiskStreamSupported() = 0;
58 virtual uint DiskStreamCount() = 0;
59 virtual uint DiskStreamCountMax() = 0;
60 virtual int MaxDiskStreams() = 0;
61 virtual void SetMaxDiskStreams(int iStreams) throw (Exception) = 0;
62 virtual String DiskStreamBufferFillBytes() = 0;
63 virtual String DiskStreamBufferFillPercentage() = 0;
64 virtual String Description() = 0;
65 virtual String Version() = 0;
66 virtual String EngineName() = 0;
67
68 /**
69 * Returns pointer to the Engine's InstrumentManager or NULL if
70 * the Engine does not provide an InstrumentManager.
71 *
72 * <b>Important:</b> All engine instances of the same engine
73 * type have to return the same InstrumentManager, that is all
74 * instances of the same engine type have to share one and
75 * the same InstrumentManager object.
76 */
77 virtual InstrumentManager* GetInstrumentManager() = 0;
78
79 /**
80 * Will be called by audio output drivers in case some
81 * fundamental audio driver parameter like sample rate or
82 * max. samples per cycle changed.
83 */
84 virtual void ReconnectAudioOutputDevice() = 0;
85
86 protected:
87 virtual ~Engine() {}; // MUST only be destroyed by EngineFactory
88 void Unregister(); // Remove self from EngineFactory.
89 friend class EngineFactory;
90 };
91
92 } // namespace LinuxSampler
93
94 #endif // __LS_ENGINE_H__

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