/[svn]/linuxsampler/trunk/src/hostplugins/vst/PluginVst.cpp
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Contents of /linuxsampler/trunk/src/hostplugins/vst/PluginVst.cpp

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Revision 2360 - (show annotations) (download)
Thu Aug 16 17:01:35 2012 UTC (7 years, 6 months ago) by persson
File size: 14574 byte(s)
* LV2: fixed save/restore of SFZ state (patch by David Robillard)
* LV2: made LV2 plugin buildable on Windows and Mac

1 /***************************************************************************
2 * *
3 * Copyright (C) 2008 - 2012 Andreas Persson *
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., 51 Franklin St, Fifth Floor, Boston, *
18 * MA 02110-1301 USA *
19 ***************************************************************************/
20
21 #include <cstdio>
22 #include <cstdlib>
23 #include <cstring>
24
25 #ifdef WIN32
26 #include <tchar.h>
27 #else
28 #include <cerrno>
29 #include <signal.h>
30 #include <sys/wait.h>
31 #include <unistd.h>
32 #include <dirent.h>
33 #include <sys/stat.h>
34 #endif
35
36 #include "PluginVst.h"
37
38 #ifndef CHANNELS
39 #define CHANNELS 32
40 #endif
41
42 namespace {
43
44 #if defined(WIN32) && CONFIG_DEBUG_LEVEL >= 2
45 // on windows, send debug logging to a file instead of a non-existent
46 // console
47 #include <cstdarg>
48 #include "../../common/Mutex.h"
49 LinuxSampler::Mutex logmutex;
50
51 void log(const char* fmt, ...) {
52 logmutex.Lock();
53 FILE* f = fopen((String(getenv("TEMP")) + "\\linuxsamplervst.log").c_str(), "a");
54 va_list ap;
55 va_start(ap, fmt);
56 vfprintf(f, fmt, ap);
57 va_end(ap);
58 fclose(f);
59 logmutex.Unlock();
60 }
61 #undef dmsg
62 #define dmsg(debuglevel,x) log x;
63 #endif
64
65
66 // *************** LinuxSamplerVstProgram ***************
67 // *
68
69 LinuxSamplerVstProgram::LinuxSamplerVstProgram() {
70 vst_strncpy(name, "Basic", kVstMaxProgNameLen);
71 }
72
73
74 // *************** LinuxSamplerEditor ***************
75 // *
76
77 LinuxSamplerEditor::LinuxSamplerEditor(AudioEffect* effect) :
78 AEffEditor(effect) {
79 dmsg(2, ("-->LinuxSamplerEditor constructor\n"));
80 #ifdef WIN32
81 ProcessHandle = INVALID_HANDLE_VALUE;
82 #else
83 pid = 0;
84 #endif
85 }
86
87 LinuxSamplerEditor::~LinuxSamplerEditor() {
88 close();
89 }
90
91 String LinuxSamplerEditor::FindFantasia() {
92 String fantasia;
93 #ifdef WIN32
94 // assume Fantasia is in the same directory or one directory above
95 // the liblinuxsampler dll
96 String lspath = LinuxSampler::Sampler::GetInstallDir();
97 if (!lspath.empty()) {
98 lspath += "\\";
99 WIN32_FIND_DATA fd;
100 HANDLE hFind =
101 FindFirstFile((lspath + "Fantasia*.jar").c_str(), &fd);
102 if (hFind == INVALID_HANDLE_VALUE) {
103 lspath += "..\\";
104 hFind = FindFirstFile((lspath + "Fantasia*.jar").c_str(), &fd);
105 }
106 if (hFind != INVALID_HANDLE_VALUE) {
107 fantasia = fd.cFileName;
108 FindClose(hFind);
109 return lspath + fantasia;
110 }
111 }
112 #elif defined(__APPLE__)
113 // look for the java application wrapper
114 const char* cmd =
115 "/Applications/LinuxSampler/Fantasia.app"
116 "/Contents/MacOS/JavaApplicationStub";
117 fantasia = String(getenv("HOME")) + cmd;
118 struct stat buf;
119 if (stat(fantasia.c_str(), &buf) != 0) {
120 fantasia = stat(cmd, &buf) == 0 ? cmd : "";
121 }
122 #else
123 // search in <datadir>/java (default: /usr/local/share/java)
124 String path(DATADIR);
125 path += *(path.end() - 1) == '/' ? "java" : "/java";
126 DIR* dir = opendir(path.c_str());
127 if (dir) {
128 while (dirent* d = readdir(dir)) {
129 const char* name = d->d_name;
130 if (strncmp("Fantasia", name, 8) == 0 &&
131 strcmp(name + strlen(name) - 4, ".jar") == 0) {
132 fantasia = path + "/" + name;
133 }
134 }
135 closedir(dir);
136 }
137 #endif
138 return fantasia;
139 }
140
141 bool LinuxSamplerEditor::open(void* ptr) {
142 dmsg(2, ("-->LinuxSamplerEditor::open\n"));
143 AEffEditor::open(ptr);
144
145 // try to start the JSampler Fantasia GUI as a separate process
146 #ifdef WIN32
147 // first check if it's already running
148 if (ProcessHandle != INVALID_HANDLE_VALUE) {
149 DWORD exitCode;
150 if (GetExitCodeProcess(ProcessHandle, &exitCode)) {
151 if (exitCode == STILL_ACTIVE) return true;
152 }
153 free(Command);
154 CloseHandle(ProcessHandle);
155 ProcessHandle = INVALID_HANDLE_VALUE;
156 }
157
158 String fantasia = FindFantasia();
159 if (!fantasia.empty()) {
160 // start a java process
161 String path; // look in PATH first
162 for (int i = 0 ; i < 2 ; i++) { // two tries
163 STARTUPINFO si;
164 PROCESS_INFORMATION pi;
165 ZeroMemory(&si, sizeof(si));
166 si.cb = sizeof(si);
167 ZeroMemory(&pi, sizeof(pi));
168
169 Command = _tcsdup(TEXT((String("\"") + path +
170 "javaw\" -jar \"" + fantasia +
171 "\"").c_str()));
172 if (CreateProcess(NULL, Command, NULL, NULL, FALSE, 0, NULL,
173 NULL, &si, &pi)) {
174 ProcessHandle = pi.hProcess;
175 CloseHandle(pi.hThread);
176 break;
177 } else {
178 free(Command);
179 if (path.empty()) {
180 // java wasn't found in PATH, try again
181 // with an alternative directory
182 char* windir = getenv("windir");
183 if (!windir) break;
184 #ifdef _WIN64
185 // LS plugin is 64 bit - look for 32 bit java
186 path = String(windir) + "\\SysWOW64\\";
187 #else
188 // LS plugin is 32 bit - look for 64 bit java
189 path = String(windir) + "\\Sysnative\\";
190 #endif
191 }
192 }
193 }
194 }
195 #else
196 // first check if it's already running
197 if (pid && waitpid(pid, 0, WNOHANG) == 0) return true;
198
199 String fantasia = FindFantasia();
200 if (!fantasia.empty())
201 {
202 // start a java process
203 pid = fork();
204 if (pid == -1) {
205 dmsg(1, ("fork failed %d %s\n", errno, strerror(errno)));
206 pid = 0;
207 } else if (pid == 0) {
208 #ifdef __APPLE__
209 execl(fantasia.c_str(), fantasia.c_str(), (char*)0);
210 #else
211 execlp("java", "java", "-jar", fantasia.c_str(), (char*)0);
212 #endif
213 dmsg(1, ("exec failed %d %s\n", errno, strerror(errno)));
214
215 // make sure something is executed, so the static
216 // destructors copied from the parent don't run
217 execl("/usr/bin/true", "/usr/bin/true", (char*)0);
218 }
219 }
220 #endif
221 dmsg(2, ("<--LinuxSamplerEditor::open\n"));
222 return true;
223 }
224
225 void LinuxSamplerEditor::close() {
226 systemWindow = 0;
227 #ifdef WIN32
228 if (ProcessHandle != INVALID_HANDLE_VALUE) {
229 TerminateProcess(ProcessHandle, 0);
230 free(Command);
231 CloseHandle(ProcessHandle);
232 ProcessHandle = INVALID_HANDLE_VALUE;
233 }
234 #else
235 if (pid) {
236 kill(pid, SIGTERM);
237 waitpid(pid, 0, 0);
238 pid = 0;
239 }
240 #endif
241 }
242
243 bool LinuxSamplerEditor::getRect(ERect** rect) {
244 ERect* r = new ERect();
245 r->top = 0;
246 r->left = 0;
247 r->bottom = 1; // 0 makes EnergyXT and Ardour on Linux crash
248 r->right = 400;
249 *rect = r;
250 return true;
251 }
252
253
254 // *************** LinuxSamplerVst ***************
255 // *
256
257 LinuxSamplerVst::LinuxSamplerVst(audioMasterCallback audioMaster) :
258 AudioEffectX(audioMaster, NbPrograms, 0),
259 StateBuf(0)
260 {
261 dmsg(2, ("-->constructor\n"));
262
263 Programs = new LinuxSamplerVstProgram[NbPrograms];
264 setProgram(0);
265 setNumInputs(0);
266 setNumOutputs(CHANNELS);
267 canProcessReplacing();
268 isSynth();
269 programsAreChunks();
270 setUniqueID(CCONST('L', 'S', 'm', 'p')); // (registred at Steinberg)
271 setEditor(new LinuxSamplerEditor(this));
272
273 suspend();
274 dmsg(2, ("<--constructor\n"));
275 }
276
277
278 void LinuxSamplerVst::resume() {
279 dmsg(2, ("-->resume\n"));
280
281 // Ardour initially sets blockSize to zero - we postpone the
282 // initialization until we have a blockSize
283 if (blockSize != 0) {
284 if (!pAudioDevice) {
285 Init(int(sampleRate), blockSize, CHANNELS);
286
287 if (!SavedChunk.empty()) {
288 SetState(SavedChunk);
289 SavedChunk.clear();
290 } else {
291 InitState();
292 }
293 } else {
294 Init(int(sampleRate), blockSize, CHANNELS);
295 }
296 }
297 AudioEffectX::resume();
298 dmsg(2, ("<--resume\n"));
299 }
300
301 LinuxSamplerVst::~LinuxSamplerVst() {
302 dmsg(2, ("-->destructor\n"));
303 delete[] Programs;
304 if (StateBuf) free(StateBuf);
305 dmsg(2, ("<--destructor\n"));
306 }
307
308
309 void LinuxSamplerVst::setProgram(VstInt32 program) {
310 if (program < 0 || program >= NbPrograms) return;
311
312 curProgram = program;
313 }
314
315
316 void LinuxSamplerVst::setProgramName(char* name) {
317 vst_strncpy(Programs[curProgram].name, name, kVstMaxProgNameLen);
318 }
319
320
321 void LinuxSamplerVst::getProgramName(char* name) {
322 vst_strncpy(name, Programs[curProgram].name, kVstMaxProgNameLen);
323 }
324
325
326 bool LinuxSamplerVst::getOutputProperties(VstInt32 index,
327 VstPinProperties* properties) {
328 if (index < CHANNELS) {
329 sprintf(properties->label, "LS %d", index + 1);
330 properties->flags = kVstPinIsActive | kVstPinIsStereo;
331 return true;
332 }
333 return false;
334 }
335
336
337 bool LinuxSamplerVst::getProgramNameIndexed(VstInt32 category, VstInt32 index,
338 char* text) {
339 if (index < NbPrograms) {
340 vst_strncpy(text, Programs[index].name, kVstMaxProgNameLen);
341 return true;
342 }
343 return false;
344 }
345
346
347 bool LinuxSamplerVst::getEffectName(char* name) {
348 vst_strncpy(name, "LinuxSampler", kVstMaxEffectNameLen);
349 return true;
350 }
351
352
353 bool LinuxSamplerVst::getVendorString(char* text) {
354 vst_strncpy(text, "linuxsampler.org", kVstMaxVendorStrLen);
355 return true;
356 }
357
358
359 bool LinuxSamplerVst::getProductString(char* text) {
360 vst_strncpy(text, "LinuxSampler VST", kVstMaxProductStrLen);
361 return true;
362 }
363
364
365 VstInt32 LinuxSamplerVst::getVendorVersion() {
366 return 1000;
367 }
368
369
370 VstInt32 LinuxSamplerVst::canDo(char* text) {
371 dmsg(2, ("canDo %s\n", text));
372 if (strcmp(text, "receiveVstEvents") == 0 ||
373 strcmp(text, "receiveVstMidiEvent") == 0) return 1;
374 return -1;
375 }
376
377 void LinuxSamplerVst::setSampleRate(float sampleRate) {
378 dmsg(2, ("linuxsampler: setSampleRate %f\n", sampleRate));
379 AudioEffectX::setSampleRate(sampleRate);
380 }
381
382 void LinuxSamplerVst::setBlockSize(VstInt32 blockSize) {
383 dmsg(2, ("linuxsampler: setBlockSize %d\n", blockSize));
384 AudioEffectX::setBlockSize(blockSize);
385 }
386
387
388 void LinuxSamplerVst::processReplacing(float** inputs, float** outputs,
389 VstInt32 sampleFrames) {
390 if (pAudioDevice) {
391 for (int i = 0 ; i < CHANNELS ; i++) {
392 pAudioDevice->Channel(i)->SetBuffer(outputs[i]);
393 }
394 pAudioDevice->Render(sampleFrames);
395 } else {
396 for (int i = 0 ; i < CHANNELS ; i++) {
397 memset(outputs[i], 0, sampleFrames * sizeof(float));
398 }
399 }
400 }
401
402
403 VstInt32 LinuxSamplerVst::processEvents(VstEvents* ev) {
404 if (pMidiDevice) {
405 for (int i = 0; i < ev->numEvents; i++)
406 {
407 if (ev->events[i]->type == kVstMidiType) {
408 VstMidiEvent* event = reinterpret_cast<VstMidiEvent*>(ev->events[i]);
409 pMidiDevice->Port()->DispatchRaw(reinterpret_cast<uint8_t*>(event->midiData),
410 event->deltaFrames);
411 }
412 }
413 }
414 return 1;
415 }
416
417
418 VstInt32 LinuxSamplerVst::getChunk(void** data, bool isPreset) {
419 dmsg(2, ("-->getChunk\n"));
420
421 String state = GetState();
422 dmsg(2, ("state=\"%s\"\n", state.c_str()));;
423 if (StateBuf) free(StateBuf);
424 StateBuf = strdup(state.c_str());
425 *data = StateBuf;
426 dmsg(2, ("<--getChunk\n"));
427 return state.length() + 1;
428 }
429
430
431 VstInt32 LinuxSamplerVst::setChunk(void* data, VstInt32 byteSize,
432 bool isPreset) {
433 dmsg(2, ("-->setChunk byteSize=%d isPreset=%d\n", byteSize, isPreset));
434
435 const char* state = static_cast<const char*>(data);
436 VstInt32 res = 0;
437 if (byteSize > 0 && state[byteSize - 1] == '\0') {
438 dmsg(2, ("state=\"%s\"\n", state));
439 if (pAudioDevice) {
440 res = SetState(state);
441 } else {
442 SavedChunk = state;
443 }
444 }
445 dmsg(2, ("<--setChunk\n"));
446 return res;
447 }
448 }
449
450
451 // *************** VST main function ***************
452 // *
453
454 AudioEffect* createEffectInstance(audioMasterCallback audioMaster)
455 {
456 return new LinuxSamplerVst(audioMaster);
457 }

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