1 |
/*************************************************************************** |
2 |
* * |
3 |
* Copyright (C) 2005 - 2009 Christian Schoenebeck * |
4 |
* * |
5 |
* This program is free software; you can redistribute it and/or modify * |
6 |
* it under the terms of the GNU General Public License as published by * |
7 |
* the Free Software Foundation; either version 2 of the License, or * |
8 |
* (at your option) any later version. * |
9 |
* * |
10 |
* This program is distributed in the hope that it will be useful, * |
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
13 |
* GNU General Public License for more details. * |
14 |
* * |
15 |
* You should have received a copy of the GNU General Public License * |
16 |
* along with this program; if not, write to the Free Software * |
17 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
18 |
* MA 02111-1307 USA * |
19 |
***************************************************************************/ |
20 |
|
21 |
#ifndef __LS_ENGINECHANNEL_H__ |
22 |
#define __LS_ENGINECHANNEL_H__ |
23 |
|
24 |
#include "../EventListeners.h" |
25 |
#include "../drivers/audio/AudioOutputDevice.h" |
26 |
#include "../drivers/midi/midi.h" |
27 |
#include "../drivers/midi/MidiInputDevice.h" |
28 |
#include "../drivers/midi/MidiInputPort.h" |
29 |
#include "../drivers/midi/VirtualMidiDevice.h" |
30 |
#include "Engine.h" |
31 |
#include "FxSend.h" |
32 |
|
33 |
namespace LinuxSampler { |
34 |
|
35 |
// just symbol prototyping |
36 |
class Sampler; |
37 |
class SamplerChannel; |
38 |
class AudioOutputDevice; |
39 |
class MidiInputPort; |
40 |
class FxSend; |
41 |
|
42 |
|
43 |
/** @brief Channel Interface for LinuxSampler Sampler Engines |
44 |
* |
45 |
* Every sampler engine can be used on several sampler channels and |
46 |
* usually the same Engine instance is used on multiple sampler |
47 |
* channels. For this every sampler engine must also implement a class |
48 |
* which handles all channel dependant parameters and channel |
49 |
* dependant execution code. |
50 |
* |
51 |
* This abstract base interface class defines all mandatory methods |
52 |
* which have to be implemented by all engine channel implementations. |
53 |
*/ |
54 |
class EngineChannel { |
55 |
public: |
56 |
|
57 |
///////////////////////////////////////////////////////////////// |
58 |
// abstract methods |
59 |
// (these have to be implemented by the descendant) |
60 |
|
61 |
virtual void PrepareLoadInstrument(const char* FileName, uint Instrument) = 0; |
62 |
virtual void LoadInstrument() = 0; |
63 |
virtual void Reset() = 0; |
64 |
virtual void SendNoteOn(uint8_t Key, uint8_t Velocity) = 0; |
65 |
virtual void SendNoteOn(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) = 0; |
66 |
virtual void SendNoteOff(uint8_t Key, uint8_t Velocity) = 0; |
67 |
virtual void SendNoteOff(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) = 0; |
68 |
virtual void SendPitchbend(int Pitch) = 0; |
69 |
virtual void SendPitchbend(int Pitch, int32_t FragmentPos) = 0; |
70 |
virtual void SendControlChange(uint8_t Controller, uint8_t Value) = 0; |
71 |
virtual void SendControlChange(uint8_t Controller, uint8_t Value, int32_t FragmentPos) = 0; |
72 |
virtual bool StatusChanged(bool bNewStatus = false) = 0; |
73 |
virtual float Volume() = 0; |
74 |
virtual void Volume(float f) = 0; |
75 |
virtual float Pan() = 0; |
76 |
virtual void Pan(float f) = 0; |
77 |
virtual uint Channels() = 0; |
78 |
virtual void Connect(AudioOutputDevice* pAudioOut) = 0; |
79 |
virtual void DisconnectAudioOutputDevice() = 0; |
80 |
virtual AudioOutputDevice* GetAudioOutputDevice() = 0; |
81 |
virtual void SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) = 0; |
82 |
virtual int OutputChannel(uint EngineAudioChannel) = 0; |
83 |
virtual void Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) = 0; |
84 |
virtual void DisconnectMidiInputPort() = 0; |
85 |
virtual MidiInputPort* GetMidiInputPort() = 0; |
86 |
virtual midi_chan_t MidiChannel() = 0; |
87 |
virtual String InstrumentFileName() = 0; |
88 |
virtual String InstrumentName() = 0; |
89 |
virtual int InstrumentIndex() = 0; |
90 |
virtual int InstrumentStatus() = 0; |
91 |
virtual Engine* GetEngine() = 0; |
92 |
virtual String EngineName() = 0; |
93 |
virtual FxSend* AddFxSend(uint8_t MidiCtrl, String Name = "") throw (Exception) = 0; |
94 |
virtual FxSend* GetFxSend(uint FxSendIndex) = 0; |
95 |
virtual uint GetFxSendCount() = 0; |
96 |
virtual void RemoveFxSend(FxSend* pFxSend) = 0; |
97 |
virtual void Connect(VirtualMidiDevice* pDevice) = 0; |
98 |
virtual void Disconnect(VirtualMidiDevice* pDevice) = 0; |
99 |
|
100 |
|
101 |
///////////////////////////////////////////////////////////////// |
102 |
// normal methods |
103 |
// (usually not to be overridden by descendant) |
104 |
|
105 |
/** |
106 |
* Sets the mute state of this channel. |
107 |
* |
108 |
* @param state - specifies the mute state of this sampler channel. |
109 |
* @throws Exception - if state does not contain valid |
110 |
* value. |
111 |
*/ |
112 |
void SetMute(int state) throw (Exception); |
113 |
|
114 |
/** |
115 |
* Determines whether this channel is muted. |
116 |
* |
117 |
* @returns 1 if the channel is muted, 0 if the channel is not muted |
118 |
* and -1 if the channel is muted because of presence of at least |
119 |
* one solo channel. |
120 |
*/ |
121 |
int GetMute(); |
122 |
|
123 |
/** |
124 |
* Sets the solo state of this channel. |
125 |
* |
126 |
* @param solo - specifies whether this is a solo channel. |
127 |
*/ |
128 |
void SetSolo(bool solo); |
129 |
|
130 |
/** |
131 |
* Determines whether this is a solo channel. |
132 |
* |
133 |
* @returns true if this is a solo channel, false otherwise. |
134 |
*/ |
135 |
bool GetSolo(); |
136 |
|
137 |
/** |
138 |
* Returns current MIDI program (change) number of this |
139 |
* EngineChannel. |
140 |
*/ |
141 |
uint8_t GetMidiProgram(); |
142 |
|
143 |
/** |
144 |
* Change EngineChannel's MIDI program. |
145 |
*/ |
146 |
void SetMidiProgram(uint8_t Program); |
147 |
|
148 |
/** |
149 |
* Returns current MIDI bank MSB (coarse) number of this |
150 |
* EngineChannel. |
151 |
*/ |
152 |
uint8_t GetMidiBankMsb(); |
153 |
|
154 |
/** |
155 |
* Change current MIDI bank MSB (coarse) number of this |
156 |
* EngineChannel. |
157 |
*/ |
158 |
void SetMidiBankMsb(uint8_t BankMSB); |
159 |
|
160 |
/** |
161 |
* Returns current MIDI bank LSB (fine) number of this |
162 |
* EngineChannel. |
163 |
*/ |
164 |
uint8_t GetMidiBankLsb(); |
165 |
|
166 |
/** |
167 |
* Change current MIDI bank LSB (fine) number of this |
168 |
* EngineChannel. |
169 |
*/ |
170 |
void SetMidiBankLsb(uint8_t BankLSB); |
171 |
|
172 |
/** |
173 |
* Returns true if this EngineChannel is using no MIDI |
174 |
* instrument map at all, that is if it will ignore all MIDI |
175 |
* program change messages. |
176 |
* |
177 |
* @see UsesDefaultMidiInstrumentMap() |
178 |
* @see GetMidiInstrumentMap() |
179 |
*/ |
180 |
bool UsesNoMidiInstrumentMap(); |
181 |
|
182 |
/** |
183 |
* Returns true if this EngineChannel is using the default MIDI |
184 |
* instrument map for handling MIDI program changes. |
185 |
* |
186 |
* @see UsesNoMidiInstrumentMap() |
187 |
* @see GetMidiInstrumentMap() |
188 |
*/ |
189 |
bool UsesDefaultMidiInstrumentMap(); |
190 |
|
191 |
/** |
192 |
* Returns ID of the MIDI instrument map currently used by this |
193 |
* EngineChannel to handle MIDI program changes. You should |
194 |
* always call @c UsesNoMidiInstrumentMap() and |
195 |
* @c UsesDefaultMidiInstrumentMap() before calling this method |
196 |
* to check if this EngineChannel is probably using the default |
197 |
* map or no map at all, because in these two particular cases |
198 |
* this method would throw an exception! |
199 |
* |
200 |
* @throws Exception - if EngineChannel is set to no map at all |
201 |
* or is set to the default map |
202 |
* @see UsesNoMidiInstrumentMap() |
203 |
* @see UsesDefaultMidiInstrumentMap() |
204 |
*/ |
205 |
int GetMidiInstrumentMap() throw (Exception); |
206 |
|
207 |
/** |
208 |
* Let this EngineChannel use no MIDI instrument map at all, |
209 |
* that is to let it ignore all MIDI program change messages. |
210 |
* |
211 |
* @see SetMidiInstrumentMapToDefault() |
212 |
* @see SetMidiInstrumentMap() |
213 |
*/ |
214 |
void SetMidiInstrumentMapToNone(); |
215 |
|
216 |
/** |
217 |
* Let this EngineChannel use the default MIDI instrument map to |
218 |
* handle MIDI program changes. |
219 |
* |
220 |
* @see SetMidiInstrumentMapToNone() |
221 |
* @see SetMidiInstrumentMap() |
222 |
*/ |
223 |
void SetMidiInstrumentMapToDefault(); |
224 |
|
225 |
/** |
226 |
* Set a specific MIDI instrument map this EngineChannel should |
227 |
* use to handle MIDI program changes. |
228 |
* |
229 |
* @see SetMidiInstrumentMapToNone() |
230 |
* @see SetMidiInstrumentMapToDefault() |
231 |
* |
232 |
* @throws Exception - in case given map does not exist |
233 |
*/ |
234 |
void SetMidiInstrumentMap(int MidiMap) throw (Exception); |
235 |
|
236 |
/** |
237 |
* Set MIDI Registered Parameter Number (RPN) Controller |
238 |
* (upper 8 bits / coarse). |
239 |
*/ |
240 |
void SetMidiRpnControllerMsb(uint8_t CtrlMSB); |
241 |
|
242 |
/** |
243 |
* Set MIDI Registered Parameter Number (RPN) Controller |
244 |
* (lower 8 bits / fine). |
245 |
*/ |
246 |
void SetMidiRpnControllerLsb(uint8_t CtrlLSB); |
247 |
|
248 |
/** |
249 |
* Reset to no RPN controller currently selected. |
250 |
*/ |
251 |
void ResetMidiRpnController(); |
252 |
|
253 |
/** |
254 |
* Registers the specified listener to be notified when the number |
255 |
* of effect sends on this channel is changed. |
256 |
*/ |
257 |
void AddFxSendCountListener(FxSendCountListener* l); |
258 |
|
259 |
/** |
260 |
* Removes the specified listener. |
261 |
*/ |
262 |
void RemoveFxSendCountListener(FxSendCountListener* l); |
263 |
|
264 |
/** |
265 |
* Removes all listeners. |
266 |
*/ |
267 |
void RemoveAllFxSendCountListeners(); |
268 |
|
269 |
/** |
270 |
* Get currently selected MIDI Registered Parameter Number |
271 |
* (RPN) Controller, this method will return the already merged |
272 |
* value (MSB and LSB value). |
273 |
* |
274 |
* @e WARNING: you have to call @c ResetMidiRpnController() |
275 |
* after using this value, otherwise all subsequent MIDI CC #6 |
276 |
* (Data) messages are interpreted as RPN controller value |
277 |
* messages. |
278 |
* |
279 |
* @returns currently selected RPN controller number, a negative |
280 |
* value if no RPN controller currently selected |
281 |
*/ |
282 |
int GetMidiRpnController(); |
283 |
|
284 |
/** |
285 |
* Gets the current number of active voices. |
286 |
*/ |
287 |
uint GetVoiceCount(); |
288 |
|
289 |
/** |
290 |
* Sets the current number of active voices. |
291 |
*/ |
292 |
void SetVoiceCount(uint Voices); |
293 |
|
294 |
/** |
295 |
* Gets the current number of active disk streams. |
296 |
*/ |
297 |
uint GetDiskStreamCount(); |
298 |
|
299 |
/** |
300 |
* Sets the current number of active disk streams. |
301 |
*/ |
302 |
void SetDiskStreamCount(uint Streams); |
303 |
|
304 |
SamplerChannel* GetSamplerChannel(); |
305 |
|
306 |
void SetSamplerChannel(SamplerChannel* pChannel); |
307 |
|
308 |
/** Returns the sampler to which this channel belongs */ |
309 |
Sampler* GetSampler(); |
310 |
|
311 |
protected: |
312 |
EngineChannel(); |
313 |
virtual ~EngineChannel(); // MUST only be destroyed by EngineChannelFactory |
314 |
|
315 |
/** |
316 |
* Notifies listeners that the number of effect sends |
317 |
* on a this channel is changed. |
318 |
* @param ChannelId The numerical ID of the sampler channel. |
319 |
* @param NewCount The new number of sampler channels. |
320 |
*/ |
321 |
void fireFxSendCountChanged(int ChannelId, int NewCount); |
322 |
|
323 |
friend class EngineChannelFactory; |
324 |
|
325 |
private: |
326 |
void* pPrivateData; |
327 |
}; |
328 |
|
329 |
} // namespace LinuxSampler |
330 |
|
331 |
#endif // __LS_ENGINECHANNEL_H__ |