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

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Revision 960 - (show annotations) (download)
Thu Nov 30 10:39:12 2006 UTC (17 years, 4 months ago) by iliev
File size: 17400 byte(s)
- fixed crash occurring on certain LSCP scripts (Bug 39)

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005, 2006 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/EngineFactory.h"
29 #include "engines/EngineChannelFactory.h"
30 #include "drivers/audio/AudioOutputDeviceFactory.h"
31 #include "drivers/midi/MidiInputDeviceFactory.h"
32 #include "network/lscpserver.h"
33
34 namespace LinuxSampler {
35
36 // ******************************************************************
37 // * SamplerChannel
38
39 SamplerChannel::SamplerChannel(Sampler* pS) {
40 pSampler = pS;
41 pEngineChannel = NULL;
42 pAudioOutputDevice = NULL;
43 pMidiInputDevice = NULL;
44 iMidiPort = 0;
45 midiChannel = midi_chan_all;
46 iIndex = -1;
47 }
48
49 SamplerChannel::~SamplerChannel() {
50 if (pEngineChannel) {
51 Engine* engine = pEngineChannel->GetEngine();
52 if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);
53
54 MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : __GetMidiInputDevicePort(GetMidiInputChannel());
55 if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
56 if (pEngineChannel) {
57 if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
58 EngineChannelFactory::Destroy(pEngineChannel);
59
60 // reconnect engine if it still exists
61 const std::set<Engine*>& engines = EngineFactory::EngineInstances();
62 if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
63 }
64 }
65 }
66
67 void SamplerChannel::SetEngineType(String EngineType) throw (Exception) {
68 dmsg(2,("SamplerChannel: Assigning engine type..."));
69
70 // create new engine channel
71 EngineChannel* pNewEngineChannel = EngineChannelFactory::Create(EngineType);
72 if (!pNewEngineChannel) throw Exception("Unknown engine type");
73
74 //FIXME: hack to allow fast retrieval of engine channel's sampler channel index
75 pNewEngineChannel->iSamplerChannelIndex = Index();
76
77 // dereference midi input port.
78 MidiInputPort* pMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
79 // disconnect old engine channel
80 if (pEngineChannel) {
81 Engine* engine = pEngineChannel->GetEngine();
82 if (pAudioOutputDevice) pAudioOutputDevice->Disconnect(engine);
83
84 if (pMidiInputPort) pMidiInputPort->Disconnect(pEngineChannel);
85 if (pAudioOutputDevice) pEngineChannel->DisconnectAudioOutputDevice();
86 EngineChannelFactory::Destroy(pEngineChannel);
87
88 // reconnect engine if it still exists
89 const std::set<Engine*>& engines = EngineFactory::EngineInstances();
90 if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
91 }
92
93 // connect new engine channel
94 if (pAudioOutputDevice) {
95 pNewEngineChannel->Connect(pAudioOutputDevice);
96 pAudioOutputDevice->Connect(pNewEngineChannel->GetEngine());
97 }
98 if (pMidiInputPort) pMidiInputPort->Connect(pNewEngineChannel, GetMidiInputChannel());
99 pEngineChannel = pNewEngineChannel;
100
101 // from now on get MIDI device and port from EngineChannel object
102 this->pMidiInputDevice = NULL;
103 this->iMidiPort = 0;
104
105 pEngineChannel->StatusChanged(true);
106
107 dmsg(2,("OK\n"));
108 }
109
110 void SamplerChannel::SetAudioOutputDevice(AudioOutputDevice* pDevice) {
111 if(pAudioOutputDevice == pDevice) return;
112
113 // disconnect old device
114 if (pAudioOutputDevice && pEngineChannel) {
115 Engine* engine = pEngineChannel->GetEngine();
116 pAudioOutputDevice->Disconnect(engine);
117
118 pEngineChannel->DisconnectAudioOutputDevice();
119
120 // reconnect engine if it still exists
121 const std::set<Engine*>& engines = EngineFactory::EngineInstances();
122 if (engines.find(engine) != engines.end()) pAudioOutputDevice->Connect(engine);
123 }
124
125 // connect new device
126 pAudioOutputDevice = pDevice;
127 if (pEngineChannel) {
128 pEngineChannel->Connect(pAudioOutputDevice);
129 pAudioOutputDevice->Connect(pEngineChannel->GetEngine());
130 }
131 }
132
133 void SamplerChannel::SetMidiInputDevice(MidiInputDevice* pDevice) {
134 SetMidiInput(pDevice, 0, GetMidiInputChannel());
135 }
136
137 void SamplerChannel::SetMidiInputPort(int MidiPort) {
138 SetMidiInput(GetMidiInputDevice(), MidiPort, GetMidiInputChannel());
139 }
140
141 void SamplerChannel::SetMidiInputChannel(midi_chan_t MidiChannel) {
142 SetMidiInput(GetMidiInputDevice(), GetMidiInputPort(), MidiChannel);
143 }
144
145 void SamplerChannel::SetMidiInput(MidiInputDevice* pDevice, int iMidiPort, midi_chan_t MidiChannel) {
146 if (!pDevice) throw Exception("No MIDI input device assigned.");
147
148 // get old and new midi input port
149 MidiInputPort* pOldMidiInputPort = __GetMidiInputDevicePort(GetMidiInputPort());
150 MidiInputPort* pNewMidiInputPort = pDevice->GetPort(iMidiPort);
151
152 // disconnect old device port
153 if (pOldMidiInputPort && pEngineChannel) pOldMidiInputPort->Disconnect(pEngineChannel);
154 // remember new device, port and channel if not engine channel yet created
155 if (!pEngineChannel) {
156 this->pMidiInputDevice = pDevice;
157 this->iMidiPort = iMidiPort;
158 this->midiChannel = MidiChannel;
159 }
160
161 // connect new device port
162 if (pNewMidiInputPort && pEngineChannel) pNewMidiInputPort->Connect(pEngineChannel, MidiChannel);
163 // Ooops.
164 if (pNewMidiInputPort == NULL)
165 throw Exception("There is no MIDI input port with index " + ToString(iMidiPort) + ".");
166 }
167
168 EngineChannel* SamplerChannel::GetEngineChannel() {
169 return pEngineChannel;
170 }
171
172 midi_chan_t SamplerChannel::GetMidiInputChannel() {
173 if (pEngineChannel) this->midiChannel = pEngineChannel->MidiChannel();
174 return this->midiChannel;
175 }
176
177 int SamplerChannel::GetMidiInputPort() {
178 MidiInputPort* pMidiInputPort = (pEngineChannel) ? pEngineChannel->GetMidiInputPort() : NULL;
179 if (pMidiInputPort) this->iMidiPort = (int) pMidiInputPort->GetPortNumber();
180 return iMidiPort;
181 }
182
183 AudioOutputDevice* SamplerChannel::GetAudioOutputDevice() {
184 return pAudioOutputDevice;
185 }
186
187 MidiInputDevice* SamplerChannel::GetMidiInputDevice() {
188 if (pEngineChannel)
189 pMidiInputDevice = (pEngineChannel->GetMidiInputPort()) ? pEngineChannel->GetMidiInputPort()->GetDevice() : NULL;
190 return pMidiInputDevice;
191 }
192
193 uint SamplerChannel::Index() {
194 if (iIndex >= 0) return iIndex;
195
196 Sampler::SamplerChannelMap::iterator iter = pSampler->mSamplerChannels.begin();
197 for (; iter != pSampler->mSamplerChannels.end(); iter++) {
198 if (iter->second == this) {
199 iIndex = iter->first;
200 return iIndex;
201 }
202 }
203
204 throw Exception("Internal error: SamplerChannel index not found");
205 }
206
207 MidiInputPort* SamplerChannel::__GetMidiInputDevicePort(int iMidiPort) {
208 MidiInputPort* pMidiInputPort = NULL;
209 MidiInputDevice* pMidiInputDevice = GetMidiInputDevice();
210 if (pMidiInputDevice)
211 pMidiInputPort = pMidiInputDevice->GetPort(iMidiPort);
212 return pMidiInputPort;
213 }
214
215
216
217 // ******************************************************************
218 // * Sampler
219
220 Sampler::Sampler() {
221 }
222
223 Sampler::~Sampler() {
224 Reset();
225 }
226
227 uint Sampler::SamplerChannels() {
228 return mSamplerChannels.size();
229 }
230
231 SamplerChannel* Sampler::AddSamplerChannel() {
232 // if there's no sampler channel yet
233 if (!mSamplerChannels.size()) {
234 SamplerChannel* pChannel = new SamplerChannel(this);
235 mSamplerChannels[0] = pChannel;
236 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, 1));
237 return pChannel;
238 }
239
240 // get the highest used sampler channel index
241 uint lastIndex = (--(mSamplerChannels.end()))->first;
242
243 // check if we reached the index limit
244 if (lastIndex + 1 < lastIndex) {
245 // search for an unoccupied sampler channel index starting from 0
246 for (uint i = 0; i < lastIndex; i++) {
247 if (mSamplerChannels.find(i) != mSamplerChannels.end()) continue;
248 // we found an unused index, so insert the new channel there
249 SamplerChannel* pChannel = new SamplerChannel(this);
250 mSamplerChannels[i] = pChannel;
251 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, i));
252 return pChannel;
253 }
254 throw Exception("Internal error: could not find unoccupied sampler channel index.");
255 }
256
257 // we have not reached the index limit so we just add the channel past the highest index
258 SamplerChannel* pChannel = new SamplerChannel(this);
259 mSamplerChannels[lastIndex + 1] = pChannel;
260 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, lastIndex + 1));
261 return pChannel;
262 }
263
264 SamplerChannel* Sampler::GetSamplerChannel(uint uiSamplerChannel) {
265 return (mSamplerChannels.find(uiSamplerChannel) != mSamplerChannels.end()) ? mSamplerChannels[uiSamplerChannel] : NULL;
266 }
267
268 std::map<uint, SamplerChannel*> Sampler::GetSamplerChannels() {
269 return mSamplerChannels;
270 }
271
272 void Sampler::RemoveSamplerChannel(SamplerChannel* pSamplerChannel) {
273 SamplerChannelMap::iterator iterChan = mSamplerChannels.begin();
274 for (; iterChan != mSamplerChannels.end(); iterChan++) {
275 if (iterChan->second == pSamplerChannel) {
276 mSamplerChannels.erase(iterChan);
277 delete pSamplerChannel;
278 LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, mSamplerChannels.size()));
279 return;
280 }
281 }
282 }
283
284 void Sampler::RemoveSamplerChannel(uint uiSamplerChannel) {
285 SamplerChannel* pChannel = GetSamplerChannel(uiSamplerChannel);
286 if (!pChannel) return;
287 RemoveSamplerChannel(pChannel);
288 }
289
290 std::vector<String> Sampler::AvailableAudioOutputDrivers() {
291 return AudioOutputDeviceFactory::AvailableDrivers();
292 }
293
294 std::vector<String> Sampler::AvailableMidiInputDrivers() {
295 return MidiInputDeviceFactory::AvailableDrivers();
296 }
297
298 std::vector<String> Sampler::AvailableEngineTypes() {
299 return EngineFactory::AvailableEngineTypes();
300 }
301
302 AudioOutputDevice* Sampler::CreateAudioOutputDevice(String AudioDriver, std::map<String,String> Parameters) throw (Exception) {
303 // create new device
304 AudioOutputDevice* pDevice = AudioOutputDeviceFactory::Create(AudioDriver, Parameters);
305
306 // add new audio device to the audio device list
307 for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
308 if (!mAudioOutputDevices[i]) {
309 mAudioOutputDevices[i] = pDevice;
310 break;
311 }
312 }
313
314 return pDevice;
315 }
316
317 uint Sampler::AudioOutputDevices() {
318 return mAudioOutputDevices.size();
319 }
320
321 uint Sampler::MidiInputDevices() {
322 return mMidiInputDevices.size();
323 }
324
325 std::map<uint, AudioOutputDevice*> Sampler::GetAudioOutputDevices() {
326 return mAudioOutputDevices;
327 }
328
329 std::map<uint, MidiInputDevice*> Sampler::GetMidiInputDevices() {
330 return mMidiInputDevices;
331 }
332
333 void Sampler::DestroyAudioOutputDevice(AudioOutputDevice* pDevice) throw (Exception) {
334 AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
335 for (; iter != mAudioOutputDevices.end(); iter++) {
336 if (iter->second == pDevice) {
337 // check if there are still sampler engines connected to this device
338 for (uint i = 0; i < SamplerChannels(); i++)
339 if (GetSamplerChannel(i)->GetAudioOutputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the audio output device.");
340
341 // disable device
342 pDevice->Stop();
343
344 // remove device from the device list
345 mAudioOutputDevices.erase(iter);
346
347 // destroy and free device from memory
348 delete pDevice;
349
350 break;
351 }
352 }
353 }
354
355 void Sampler::DestroyMidiInputDevice(MidiInputDevice* pDevice) throw (Exception) {
356 MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
357 for (; iter != mMidiInputDevices.end(); iter++) {
358 if (iter->second == pDevice) {
359 // check if there are still sampler engines connected to this device
360 for (uint i = 0; i < SamplerChannels(); i++)
361 if (GetSamplerChannel(i)->GetMidiInputDevice() == pDevice) throw Exception("Sampler channel " + ToString(i) + " is still connected to the midi input device.");
362
363 // disable device
364 pDevice->StopListen();
365
366 // remove device from the device list
367 mMidiInputDevices.erase(iter);
368
369 // destroy and free device from memory
370 delete pDevice;
371
372 break;
373 }
374 }
375 }
376
377 MidiInputDevice* Sampler::CreateMidiInputDevice(String MidiDriver, std::map<String,String> Parameters) throw (Exception) {
378 // create new device
379 MidiInputDevice* pDevice = MidiInputDeviceFactory::Create(MidiDriver, Parameters, this);
380
381 // add new device to the midi device list
382 for (uint i = 0; ; i++) { // seek for a free place starting from the beginning
383 if (!mMidiInputDevices[i]) {
384 mMidiInputDevices[i] = pDevice;
385 break;
386 }
387 }
388
389 return pDevice;
390 }
391
392 int Sampler::GetVoiceCount() {
393 int count = 0;
394 std::set<Engine*>::iterator it = EngineFactory::EngineInstances().begin();
395
396 for(; it != EngineFactory::EngineInstances().end(); it++) {
397 count += (*it)->VoiceCount();
398 }
399
400 return count;
401 }
402
403 void Sampler::Reset() {
404 // delete sampler channels
405 try {
406 while (true) {
407 SamplerChannelMap::iterator iter = mSamplerChannels.begin();
408 if (iter == mSamplerChannels.end()) break;
409 RemoveSamplerChannel(iter->second);
410 }
411 }
412 catch(...) {
413 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all sampler channels, exiting.\n" << std::flush;
414 exit(EXIT_FAILURE);
415 }
416
417 // delete midi input devices
418 try {
419 while (true) {
420 MidiInputDeviceMap::iterator iter = mMidiInputDevices.begin();
421 if (iter == mMidiInputDevices.end()) break;
422 DestroyMidiInputDevice(iter->second);
423 }
424 }
425 catch(...) {
426 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all MIDI input devices, exiting.\n" << std::flush;
427 exit(EXIT_FAILURE);
428 }
429
430 // delete audio output devices
431 try {
432 while (true) {
433 AudioOutputDeviceMap::iterator iter = mAudioOutputDevices.begin();
434 if (iter == mAudioOutputDevices.end()) break;
435 DestroyAudioOutputDevice(iter->second);
436 }
437 }
438 catch(...) {
439 std::cerr << "Sampler::Reset(): Exception occured while trying to delete all audio output devices, exiting.\n" << std::flush;
440 exit(EXIT_FAILURE);
441 }
442 }
443
444 } // namespace LinuxSampler

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