1 |
/*************************************************************************** |
2 |
* * |
3 |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
5 |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
6 |
* Copyright (C) 2005 - 2007 Christian Schoenebeck * |
7 |
* * |
8 |
* This library 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 library 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 library; 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_INSTRUMENTMANAGER_H__ |
25 |
#define __LS_INSTRUMENTMANAGER_H__ |
26 |
|
27 |
#include "../common/global.h" |
28 |
#include "../common/Exception.h" |
29 |
|
30 |
#include <vector> |
31 |
|
32 |
namespace LinuxSampler { |
33 |
|
34 |
// just symbol prototyping |
35 |
class EngineChannel; |
36 |
|
37 |
/** |
38 |
* Will be thrown by InstrumentManager implementations on errors. |
39 |
*/ |
40 |
class InstrumentManagerException : public Exception { |
41 |
public: |
42 |
InstrumentManagerException(String msg) : Exception(msg) {} |
43 |
}; |
44 |
|
45 |
/** @brief Abstract interface class for InstrumentManagers. |
46 |
* |
47 |
* Sampler engines should provide an InstrumentManager for allowing |
48 |
* detailed information retrieval and setting of its managed instruments |
49 |
* through this general API. |
50 |
*/ |
51 |
class InstrumentManager { |
52 |
public: |
53 |
/** |
54 |
* Defines life-time of an instrument. |
55 |
*/ |
56 |
enum mode_t { |
57 |
ON_DEMAND = 0, ///< Instrument will be loaded when needed, freed once not needed anymore. |
58 |
ON_DEMAND_HOLD = 1, ///< Instrument will be loaded when needed and kept even if not needed anymore. |
59 |
PERSISTENT = 2 ///< Instrument will immediately be loaded and kept all the time. |
60 |
}; |
61 |
|
62 |
/** |
63 |
* Reflects unique ID of an instrument. |
64 |
*/ |
65 |
struct instrument_id_t { |
66 |
String FileName; ///< File name of the instrument. |
67 |
uint Index; ///< Index of the instrument within the file. |
68 |
|
69 |
// TODO: we should extend operator<() so it will be able to detect that file x and file y are actually the same files, e.g. because one of them is a symlink / share the same inode |
70 |
bool operator<(const instrument_id_t& o) const { |
71 |
return (Index < o.Index || (Index == o.Index && FileName < o.FileName)); |
72 |
} |
73 |
}; |
74 |
|
75 |
/** |
76 |
* Rather abstract informations about an instrument. |
77 |
*/ |
78 |
struct instrument_info_t { |
79 |
String InstrumentName; |
80 |
String FormatVersion; |
81 |
String Product; |
82 |
String Artists; |
83 |
}; |
84 |
|
85 |
/** |
86 |
* Returns all managed instruments. |
87 |
* |
88 |
* This method has to be implemented by the descendant. |
89 |
*/ |
90 |
virtual std::vector<instrument_id_t> Instruments() = 0; |
91 |
|
92 |
/** |
93 |
* Returns the current life-time strategy for the given |
94 |
* instrument. |
95 |
* |
96 |
* This method has to be implemented by the descendant. |
97 |
*/ |
98 |
virtual mode_t GetMode(const instrument_id_t& ID) = 0; |
99 |
|
100 |
/** |
101 |
* Change the current life-time strategy for the given |
102 |
* instrument. |
103 |
* |
104 |
* This method has to be implemented by the descendant. |
105 |
*/ |
106 |
virtual void SetMode(const instrument_id_t& ID, mode_t Mode) = 0; |
107 |
|
108 |
/** |
109 |
* Same as SetMode(), but with the difference that this method |
110 |
* won't block. |
111 |
*/ |
112 |
void SetModeInBackground(const instrument_id_t& ID, mode_t Mode); |
113 |
|
114 |
/** |
115 |
* Same as loading the given instrument directly on the given |
116 |
* EngineChannel, but this method will not block, instead it |
117 |
* will load the instrument in a separate thread. |
118 |
* |
119 |
* @param ID - the instrument to be loaded |
120 |
* @param pEngineChannel - on which engine channel the instrument |
121 |
* should be loaded |
122 |
*/ |
123 |
static void LoadInstrumentInBackground(instrument_id_t ID, EngineChannel* pEngineChannel); |
124 |
|
125 |
/** |
126 |
* Returns the name of the given instrument as reflected by its |
127 |
* file. |
128 |
* |
129 |
* This method has to be implemented by the descendant. |
130 |
*/ |
131 |
virtual String GetInstrumentName(instrument_id_t ID) = 0; |
132 |
|
133 |
/** |
134 |
* Returns a textual identifier of the data structure for the |
135 |
* given loaded instrument, which usually reflects the name of |
136 |
* of the library used to load the instrument (i.e. "libgig"). |
137 |
* |
138 |
* This method has to be implemented by the descendant. |
139 |
*/ |
140 |
virtual String GetInstrumentDataStructureName(instrument_id_t ID) = 0; |
141 |
|
142 |
/** |
143 |
* Returns the version of the data structure for the given |
144 |
* loaded instrument, which usually reflects the version of the |
145 |
* library which was used to load the instrument (i.e. "3.1.0"). |
146 |
* |
147 |
* This method has to be implemented by the descendant. |
148 |
*/ |
149 |
virtual String GetInstrumentDataStructureVersion(instrument_id_t ID) = 0; |
150 |
|
151 |
/** |
152 |
* Spawn an appropriate editor for the given instrument that is |
153 |
* actually capable to handle the instrument's format and data |
154 |
* structure. The instrument editor will be hosted in the |
155 |
* sampler's own process to allow immediate live-editing of the |
156 |
* instrument while playing the instrument in parallel by the |
157 |
* sampler. |
158 |
* |
159 |
* For this to work, instrument editor applications have to |
160 |
* implement the abstract interface class @c InstrumentEditor |
161 |
* and have to generate a plugin DLL that has to be placed into |
162 |
* the appropriate plugin directory of the sampler. |
163 |
* |
164 |
* This method has to be implemented by the descendant. |
165 |
* |
166 |
* @throws InstrumentManagerException - in case no compatible |
167 |
* instrument editor is registered to the sampler |
168 |
*/ |
169 |
virtual void LaunchInstrumentEditor(instrument_id_t ID) throw (InstrumentManagerException) = 0; |
170 |
|
171 |
/** |
172 |
* Returns a list of instrument IDs of the provided instrument |
173 |
* file in case the provided file's format is supported. |
174 |
* |
175 |
* @throws InstrumentManagerException if the format of the |
176 |
* provided instrument file is not supported |
177 |
*/ |
178 |
virtual std::vector<instrument_id_t> GetInstrumentFileContent(String File) throw (InstrumentManagerException) = 0; |
179 |
|
180 |
/** |
181 |
* Get detailed informations about the provided instrument file. |
182 |
* |
183 |
* @throws InstrumentManagerException if the format of the |
184 |
* provided instrument file is not supported |
185 |
*/ |
186 |
virtual instrument_info_t GetInstrumentInfo(instrument_id_t ID) throw (InstrumentManagerException) = 0; |
187 |
}; |
188 |
|
189 |
} |
190 |
|
191 |
#endif // __LS_INSTRUMENTMANAGER_H__ |