/[svn]/linuxsampler/trunk/src/Sampler.cpp
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Contents of /linuxsampler/trunk/src/Sampler.cpp

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Revision 675 - (show annotations) (download)
Wed Jun 22 22:09:28 2005 UTC (16 years, 1 month ago) by schoenebeck
File size: 15731 byte(s)
* update MIDI channel info on program change

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 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 #include <sstream>
25
26 #include "Sampler.h"
27
28 #include "engines/EngineChannelFactory.h"
29 #include "drivers/audio/AudioOutputDeviceFactory.h"
30 #include "drivers/midi/MidiInputDeviceFactory.h"
31 #include "network/lscpserver.h"
32
33 namespace LinuxSampler {
34
35 // ******************************************************************
36 // * SamplerChannel
37
38 SamplerChannel::SamplerChannel(Sampler* pS) {
39 pSampler = pS;
40 pEngineChannel = NULL;
41 pAudioOutputDevice = NULL;
42 pMidiInputDevice = NULL;
43 iMidiPort = 0;
44 midiChannel = midi_chan_all;
45 iIndex = -1;
46 }
47
48 SamplerChannel::~SamplerChannel() {
49 if (pEngineChannel) {
50 MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : __GetMidiInputDevicePort(GetMidiInputChannel());
51 if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
52 if (pEngineChannel) {
53 if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
54 EngineChannelFactory::Destroy(pEngineChannel);
55 }
56 }
57 }
58
59 void SamplerChannel::SetEngineType(String EngineType) throw (LinuxSamplerException) {
60 dmsg(2,("SamplerChannel: Assigning engine type..."));
61
62 // create new engine channel
63 EngineChannel* pNewEngineChannel = EngineChannelFactory::Create(EngineType);
64 if (!pNewEngineChannel) throw LinuxSamplerException("Unknown engine type");
65
66 //FIXME: hack to allow fast retrieval of engine channel's sampler channel index
67 pNewEngineChannel->iSamplerChannelIndex = Index();
68
69 // dereference midi input port.
70 MidiInputPort* pMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
71 // disconnect old engine channel
72 if (pEngineChannel) {
73 if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
74 if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
75 EngineChannelFactory::Destroy(pEngineChannel);
76 }
77
78 // connect new engine channel
79 if (pMidiInputPort) pMidiInputPort->Connect(pNewEngineChannel, GetMidiInputChannel());
80 if (pAudioOutputDevice) {
81 pNewEngineChannel->Connect(pAudioOutputDevice);
82 pAudioOutputDevice->Connect(pNewEngineChannel->GetEngine());
83 }
84 pEngineChannel = pNewEngineChannel;
85
86 // from now on get MIDI device and port from EngineChannel object
87 this->pMidiInputDevice = NULL;
88 this->iMidiPort = 0;
89
90 dmsg(2,("OK\n"));
91 }
92
93 void SamplerChannel::SetAudioOutputDevice(AudioOutputDevice* pDevice) {
94 // disconnect old device
95 if (pAudioOutputDevice && pEngineChannel) pEngineChannel->DisconnectAudioOutputDevice();
96 // connect new device
97 pAudioOutputDevice = pDevice;
98 if (pEngineChannel) {
99 pEngineChannel->Connect(pAudioOutputDevice);
100 pAudioOutputDevice->Connect(pEngineChannel->GetEngine());
101 }
102 }
103
104 void SamplerChannel::SetMidiInputDevice(MidiInputDevice* pDevice) {
105 SetMidiInput(pDevice, 0, GetMidiInputChannel());
106 }
107
108 void SamplerChannel::SetMidiInputPort(int MidiPort) {
109 SetMidiInput(GetMidiInputDevice(), MidiPort, GetMidiInputChannel());
110 }
111
112 void SamplerChannel::SetMidiInputChannel(midi_chan_t MidiChannel) {
113 SetMidiInput(GetMidiInputDevice(), GetMidiInputPort(), MidiChannel);
114 }
115
116 void SamplerChannel::SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel) {
117 if (!pDevice) throw LinuxSamplerException("No MIDI input device assigned.");
118
119 // get old and new midi input port
120 MidiInputPort* pOldMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
121 MidiInputPort* pNewMidiInputPort = pDevice->GetPort(iMidiPort);
122
123 // disconnect old device port
124 if (pOldMidiInputPort && pEngineChannel) pOldMidiInputPort->Disconnect(pEngineChannel);
125 // remember new device, port and channel if not engine channel yet created
126 if (!pEngineChannel) {
127 this->pMidiInputDevice = pDevice;
128 this->iMidiPort = iMidiPort;
129 this->midiChannel = MidiChannel;
130 }
131
132 // connect new device port
133 if (pNewMidiInputPort && pEngineChannel) pNewMidiInputPort->Connect(pEngineChannel, MidiChannel);
134 // Ooops.
135 if (pNewMidiInputPort == NULL)
136 throw LinuxSamplerException("There is no MIDI input port with index " + ToString(iMidiPort) + ".");
137 }
138
139 EngineChannel* SamplerChannel::GetEngineChannel() {
140 return pEngineChannel;
141 }
142
143 midi_chan_t SamplerChannel::GetMidiInputChannel() {
144 if (pEngineChannel) this->midiChannel = pEngineChannel->MidiChannel();
145 return this->midiChannel;
146 }
147
148 int SamplerChannel::GetMidiInputPort() {
149 MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : NULL;
150 if (pMidiInputPort) this->iMidiPort = (int) pMidiInputPort->GetPortNumber();
151 return iMidiPort;
152 }
153
154 AudioOutputDevice* SamplerChannel::GetAudioOutputDevice() {
155 return pAudioOutputDevice;
156 }
157
158 MidiInputDevice* SamplerChannel::GetMidiInputDevice() {
159 if (pEngineChannel)
160 pMidiInputDevice = (pEngineChannel->GetMidiInputPort()) ? pEngineChannel->GetMidiInputPort()->GetDevice() : NULL;
161 return pMidiInputDevice;
162 }
163
164 uint SamplerChannel::Index() {
165 if (iIndex >= 0) return iIndex;
166
167 Sampler::SamplerChannelMap::iterator iter = pSampler->mSamplerChannels.begin();
168 for (; iter != pSampler->mSamplerChannels.end(); iter++) {
169 if (iter->second == this) {
170 iIndex = iter->first;
171 return iIndex;
172 }
173 }
174
175 throw LinuxSamplerException("Internal error: SamplerChannel index not found");
176 }
177
178 MidiInputPort* SamplerChannel::__GetMidiInputDevicePort(int iMidiPort) {
179 MidiInputPort* pMidiInputPort = NULL;
180 MidiInputDevice* pMidiInputDevice = GetMidiInputDevice();
181 if (pMidiInputDevice)
182 pMidiInputPort = pMidiInputDevice->GetPort(iMidiPort);
183 return pMidiInputPort;
184 }
185
186
187
188 // ******************************************************************
189 // * Sampler
190
191 Sampler::Sampler() {
192 }
193
194 Sampler::~Sampler() {
195 Reset();
196 }
197
198 uint Sampler::SamplerChannels() {
199 return mSamplerChannels.size();
200 }
201
202 SamplerChannel* Sampler::AddSamplerChannel() {
203 // if there's no sampler channel yet
204 if (!mSamplerChannels.size()) {
205 SamplerChannel* pChannel = new SamplerChannel(this);
206 mSamplerChannels[0] = pChannel;
207 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, 1));
208 return pChannel;
209 }
210
211 // get the highest used sampler channel index
212 uint lastIndex = (--(mSamplerChannels.end()))->first;
213
214 // check if we reached the index limit
215 if (lastIndex + 1 < lastIndex) {
216 // search for an unoccupied sampler channel index starting from 0
217 for (uint i = 0; i < lastIndex; i++) {
218 if (mSamplerChannels.find(i) != mSamplerChannels.end()) continue;
219 // we found an unused index, so insert the new channel there
220 SamplerChannel* pChannel = new SamplerChannel(this);
221 mSamplerChannels[i] = pChannel;
222 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, i));
223 return pChannel;
224 }
225 throw LinuxSamplerException("Internal error: could not find unoccupied sampler channel index.");
226 }
227
228 // we have not reached the index limit so we just add the channel past the highest index
229 SamplerChannel* pChannel = new SamplerChannel(this);
230 mSamplerChannels[lastIndex + 1] = pChannel;
231 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, lastIndex + 1));
232 return pChannel;
233 }
234
235 SamplerChannel* Sampler::GetSamplerChannel(uint uiSamplerChannel) {
236 return (mSamplerChannels.find(uiSamplerChannel) != mSamplerChannels.end()) ? mSamplerChannels[uiSamplerChannel] : NULL;
237 }
238
239 std::map<uint, SamplerChannel*> Sampler::GetSamplerChannels() {
240 return mSamplerChannels;
241 }
242
243 void Sampler::RemoveSamplerChannel(SamplerChannel* pSamplerChannel) {
244 SamplerChannelMap::iterator iterChan = mSamplerChannels.begin();
245 for (; iterChan != mSamplerChannels.end(); iterChan++) {
246 if (iterChan->second == pSamplerChannel) {
247 mSamplerChannels.erase(iterChan);
248 delete pSamplerChannel;
249 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, mSamplerChannels.size()));
250 return;
251 }
252 }
253 }
254
255 void Sampler::RemoveSamplerChannel(uint uiSamplerChannel) {
256 SamplerChannel* pChannel = GetSamplerChannel(uiSamplerChannel);
257 if (!pChannel) return;
258 RemoveSamplerChannel(pChannel);
259 }
260
261 std::vector<String> Sampler::AvailableAudioOutputDrivers() {
262 return AudioOutputDeviceFactory::AvailableDrivers();
263 }
264
265 AudioOutputDevice* Sampler::CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (LinuxSamplerException) {
266 // create new device
267 AudioOutputDevice* pDevice = AudioOutputDeviceFactory::Create(AudioDriver, Parameters);
268
269 // add new audio device to the audio device list
270 for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
271 if (!mAudioOutputDevices[i]) {
272 mAudioOutputDevices[i] = pDevice;
273 break;
274 }
275 }
276
277 return pDevice;
278 }
279
280 uint Sampler::AudioOutputDevices() {
281 return mAudioOutputDevices.size();
282 }
283
284 uint Sampler::MidiInputDevices() {
285 return mMidiInputDevices.size();
286 }
287
288 std::map<uint, AudioOutputDevice*> Sampler::GetAudioOutputDevices() {
289 return mAudioOutputDevices;
290 }
291
292 std::map<uint, MidiInputDevice*> Sampler::GetMidiInputDevices() {
293 return mMidiInputDevices;
294 }
295
296 void Sampler::DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (LinuxSamplerException) {
297 AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
298 for (; iter != mAudioOutputDevices.end(); iter++) {
299 if (iter->second == pDevice) {
300 // check if there are still sampler engines connected to this device
301 for (uint i = 0; i < SamplerChannels(); i++)
302 if (GetSamplerChannel(i)->GetAudioOutputDevice() == pDevice) throw LinuxSamplerException("Sampler channel " + ToString(i) + " is still connected to the audio output device.");
303
304 // disable device
305 pDevice->Stop();
306
307 // remove device from the device list
308 mAudioOutputDevices.erase(iter);
309
310 // destroy and free device from memory
311 delete pDevice;
312 }
313 }
314 }
315
316 void Sampler::DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (LinuxSamplerException) {
317 MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
318 for (; iter != mMidiInputDevices.end(); iter++) {
319 if (iter->second == pDevice) {
320 // check if there are still sampler engines connected to this device
321 for (uint i = 0; i < SamplerChannels(); i++)
322 if (GetSamplerChannel(i)->GetMidiInputDevice() == pDevice) throw LinuxSamplerException("Sampler channel " + ToString(i) + " is still connected to the midi input device.");
323
324 // disable device
325 pDevice->StopListen();
326
327 // remove device from the device list
328 mMidiInputDevices.erase(iter);
329
330 // destroy and free device from memory
331 delete pDevice;
332 }
333 }
334 }
335
336 MidiInputDevice* Sampler::CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (LinuxSamplerException) {
337 // create new device
338 MidiInputDevice* pDevice = MidiInputDeviceFactory::Create(MidiDriver, Parameters, this);
339
340 // add new device to the midi device list
341 for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
342 if (!mMidiInputDevices[i]) {
343 mMidiInputDevices[i] = pDevice;
344 break;
345 }
346 }
347
348 return pDevice;
349 }
350
351 void Sampler::Reset() {
352 // delete sampler channels
353 try {
354 while (true) {
355 SamplerChannelMap::iterator iter = mSamplerChannels.begin();
356 if (iter == mSamplerChannels.end()) break;
357 RemoveSamplerChannel(iter->second);
358 }
359 }
360 catch(...) {
361 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all sampler channels, exiting.\n" << std::flush;
362 exit(EXIT_FAILURE);
363 }
364
365 // delete midi input devices
366 try {
367 while (true) {
368 MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
369 if (iter == mMidiInputDevices.end()) break;
370 DestroyMidiInputDevice(iter->second);
371 }
372 }
373 catch(...) {
374 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all MIDI input devices, exiting.\n" << std::flush;
375 exit(EXIT_FAILURE);
376 }
377
378 // delete audio output devices
379 try {
380 while (true) {
381 AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
382 if (iter == mAudioOutputDevices.end()) break;
383 DestroyAudioOutputDevice(iter->second);
384 }
385 }
386 catch(...) {
387 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all audio output devices, exiting.\n" << std::flush;
388 exit(EXIT_FAILURE);
389 }
390 }
391
392 } // namespace LinuxSampler

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