/[svn]/linuxsampler/trunk/src/linuxsampler.cpp
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Annotation of /linuxsampler/trunk/src/linuxsampler.cpp

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Revision 563 - (hide annotations) (download)
Sun May 22 20:43:32 2005 UTC (18 years, 10 months ago) by schoenebeck
File size: 10879 byte(s)
* (re)implemented voice stealing algorithm "oldestvoiceonkey" and made it
  the default voice stealing algorithm
* added new LSCP command "GET SERVER INFO" which currently returns
  description and version about this sampler
* added some API documentation comments
* minor cleanup

1 schoenebeck 9 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 61 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 411 * Copyright (C) 2005 Christian Schoenebeck *
7 schoenebeck 9 * *
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 <getopt.h>
25     #include <signal.h>
26    
27 schoenebeck 53 #include "Sampler.h"
28 schoenebeck 420 #include "engines/EngineFactory.h"
29 schoenebeck 207 #include "drivers/midi/MidiInputDeviceFactory.h"
30 schoenebeck 203 #include "drivers/audio/AudioOutputDeviceFactory.h"
31 senkov 325 #include "engines/gig/Profiler.h"
32 schoenebeck 35 #include "network/lscpserver.h"
33 schoenebeck 271 #include "common/stacktrace.h"
34 schoenebeck 319 #include "common/Features.h"
35 schoenebeck 9
36 schoenebeck 53 using namespace LinuxSampler;
37    
38 schoenebeck 211 Sampler* pSampler = NULL;
39     LSCPServer* pLSCPServer = NULL;
40 schoenebeck 271 pthread_t main_thread;
41 schoenebeck 420 bool bPrintStatistics = false;
42 senkov 325 bool profile = false;
43     bool tune = true;
44 schoenebeck 9
45     void parse_options(int argc, char **argv);
46     void signal_handler(int signal);
47 schoenebeck 271 void kill_app();
48 schoenebeck 9
49     int main(int argc, char **argv) {
50    
51 schoenebeck 271 // initialize the stack trace mechanism with our binary file
52     StackTraceInit(argv[0], -1);
53    
54     main_thread = pthread_self();
55    
56 schoenebeck 9 // setting signal handler for catching SIGINT (thus e.g. <CTRL><C>)
57     signal(SIGINT, signal_handler);
58    
59 schoenebeck 271 // register signal handler for all unusual signals
60     // (we will print the stack trace and exit)
61     struct sigaction sact;
62     sigemptyset(&sact.sa_mask);
63     sact.sa_flags = 0;
64     sact.sa_handler = signal_handler;
65     sigaction(SIGSEGV, &sact, NULL);
66     sigaction(SIGBUS, &sact, NULL);
67     sigaction(SIGILL, &sact, NULL);
68     sigaction(SIGFPE, &sact, NULL);
69     sigaction(SIGUSR1, &sact, NULL);
70     sigaction(SIGUSR2, &sact, NULL);
71    
72 schoenebeck 9 // parse and assign command line options
73 senkov 325 parse_options(argc, argv);
74 schoenebeck 9
75 schoenebeck 207 dmsg(1,("LinuxSampler %s\n", VERSION));
76     dmsg(1,("Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck\n"));
77 schoenebeck 411 dmsg(1,("Copyright (C) 2005 Christian Schoenebeck\n"));
78 schoenebeck 123
79 senkov 325 if (tune)
80     {
81 persson 425 // detect and print system / CPU specific features
82     String sFeatures;
83     Features::detect();
84 senkov 325 #if ARCH_X86
85 persson 425 if (Features::supportsMMX()) sFeatures += " MMX";
86     if (Features::supportsSSE()) sFeatures += " SSE";
87     if (Features::supportsSSE2()) {
88     sFeatures += " SSE2";
89    
90     // enable denormals-are-zeros mode
91     int x;
92     __asm__ __volatile__ (
93     "stmxcsr %0\n\t"
94     "movl %0, %%eax\n\t"
95     "orl $0x40, %%eax\n\t"
96     "movl %%eax, %0\n\t"
97     "ldmxcsr %0\n\t"
98     :: "m" (x)
99     : "%eax"
100     );
101     }
102 senkov 325 #endif // ARCH_X86
103 persson 425 if (!sFeatures.size()) sFeatures = " None";
104     dmsg(1,("Detected features:%s\n",sFeatures.c_str()));
105 senkov 325 }
106 schoenebeck 319
107 schoenebeck 53 // create LinuxSampler instance
108 schoenebeck 123 dmsg(1,("Creating Sampler..."));
109 schoenebeck 53 pSampler = new Sampler;
110 schoenebeck 123 dmsg(1,("OK\n"));
111 schoenebeck 53
112 schoenebeck 207 dmsg(1,("Registered MIDI input drivers: %s\n", MidiInputDeviceFactory::AvailableDriversAsString().c_str()));
113 schoenebeck 123 dmsg(1,("Registered audio output drivers: %s\n", AudioOutputDeviceFactory::AvailableDriversAsString().c_str()));
114    
115 schoenebeck 53 // start LSCP network server
116 schoenebeck 214 dmsg(1,("Starting LSCP network server (on TCP port %d)...", LSCP_PORT));
117 schoenebeck 53 pLSCPServer = new LSCPServer(pSampler);
118     pLSCPServer->StartThread();
119 schoenebeck 211 pLSCPServer->WaitUntilInitialized();
120 schoenebeck 12 dmsg(1,("OK\n"));
121 schoenebeck 9
122 senkov 325 if (profile)
123     {
124 persson 425 dmsg(1,("Calibrating profiler..."));
125     gig::Profiler::Calibrate();
126     gig::Profiler::Reset();
127     dmsg(1,("OK\n"));
128 senkov 325 }
129    
130 schoenebeck 563 printf("LinuxSampler initialization completed. :-)\n\n");
131 schoenebeck 9
132 senkov 360 std::list<LSCPEvent::event_t> rtEvents;
133     rtEvents.push_back(LSCPEvent::event_voice_count);
134     rtEvents.push_back(LSCPEvent::event_stream_count);
135     rtEvents.push_back(LSCPEvent::event_buffer_fill);
136    
137 schoenebeck 420 while (true) {
138     if (bPrintStatistics) {
139     std::set<Engine*> engines = EngineFactory::EngineInstances();
140     std::set<Engine*>::iterator itEngine = engines.begin();
141     for (int i = 0; itEngine != engines.end(); itEngine++, i++) {
142     Engine* pEngine = *itEngine;
143     printf("Engine %d) Voices: %3.3d (Max: %3.3d) Streams: %3.3d (Max: %3.3d)\n", i,
144     pEngine->VoiceCount(), pEngine->VoiceCountMax(),
145     pEngine->DiskStreamCount(), pEngine->DiskStreamCountMax()
146     );
147     fflush(stdout);
148     }
149     }
150 persson 425
151 senkov 325 sleep(1);
152     if (profile)
153     {
154 persson 425 unsigned int samplingFreq = 48000; //FIXME: hardcoded for now
155     unsigned int bv = gig::Profiler::GetBogoVoices(samplingFreq);
156     if (bv != 0)
157     {
158     printf(" BogoVoices: %i \r", bv);
159     fflush(stdout);
160     }
161 senkov 325 }
162 persson 425
163 senkov 360 if (LSCPServer::EventSubscribers(rtEvents))
164     {
165 persson 425 LSCPServer::LockRTNotify();
166     std::map<uint,SamplerChannel*> channels = pSampler->GetSamplerChannels();
167     std::map<uint,SamplerChannel*>::iterator iter = channels.begin();
168     for (; iter != channels.end(); iter++) {
169     SamplerChannel* pSamplerChannel = iter->second;
170     EngineChannel* pEngineChannel = pSamplerChannel->GetEngineChannel();
171     if (!pEngineChannel) continue;
172     Engine* pEngine = pEngineChannel->GetEngine();
173     if (!pEngine) continue;
174     LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_voice_count, iter->first, pEngine->VoiceCount()));
175     LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_stream_count, iter->first, pEngine->DiskStreamCount()));
176     LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_buffer_fill, iter->first, pEngine->DiskStreamBufferFillPercentage()));
177     }
178     LSCPServer::UnlockRTNotify();
179 senkov 360 }
180    
181 senoner 10 }
182    
183 schoenebeck 9 return EXIT_SUCCESS;
184     }
185    
186 schoenebeck 271 void signal_handler(int iSignal) {
187     switch (iSignal) {
188     case SIGINT: {
189     if (pthread_equal(pthread_self(), main_thread)) {
190     if (pLSCPServer) {
191     pLSCPServer->StopThread();
192     delete pLSCPServer;
193     }
194     if (pSampler) delete pSampler;
195     printf("LinuxSampler stopped due to SIGINT.\n");
196     exit(EXIT_SUCCESS);
197     }
198     return;
199 schoenebeck 53 }
200 schoenebeck 271 case SIGSEGV:
201     std::cerr << ">>> FATAL ERROR: Segmentation fault (SIGSEGV) occured! <<<\n" << std::flush;
202     break;
203     case SIGBUS:
204     std::cerr << ">>> FATAL ERROR: Access to undefined portion of a memory object (SIGBUS) occured! <<<\n" << std::flush;
205     break;
206     case SIGILL:
207     std::cerr << ">>> FATAL ERROR: Illegal instruction (SIGILL) occured! <<<\n" << std::flush;
208     break;
209     case SIGFPE:
210     std::cerr << ">>> FATAL ERROR: Erroneous arithmetic operation (SIGFPE) occured! <<<\n" << std::flush;
211     break;
212     case SIGUSR1:
213     std::cerr << ">>> User defined signal 1 (SIGUSR1) received <<<\n" << std::flush;
214     break;
215     case SIGUSR2:
216     std::cerr << ">>> User defined signal 2 (SIGUSR2) received <<<\n" << std::flush;
217     break;
218     default: { // this should never happen, as we register for the signals we want
219     std::cerr << ">>> FATAL ERROR: Unknown signal received! <<<\n" << std::flush;
220     break;
221     }
222 schoenebeck 9 }
223 schoenebeck 271 signal(iSignal, SIG_DFL); // Reinstall default handler to prevent race conditions
224     std::cerr << "Showing stack trace...\n" << std::flush;
225     StackTrace();
226     sleep(2);
227     std::cerr << "Killing LinuxSampler...\n" << std::flush;
228     kill_app(); // Use abort() if we want to generate a core dump.
229 schoenebeck 9 }
230    
231 schoenebeck 271 void kill_app() {
232     kill(main_thread, SIGKILL);
233     }
234    
235 senkov 325 void parse_options(int argc, char **argv) {
236 schoenebeck 9 int res;
237     int option_index = 0;
238     static struct option long_options[] =
239     {
240     {"help",0,0,0},
241 senkov 325 {"version",0,0,0},
242     {"profile",0,0,0},
243     {"no-tune",0,0,0},
244 schoenebeck 420 {"statistics",0,0,0},
245 schoenebeck 9 {0,0,0,0}
246     };
247    
248     while (true) {
249 schoenebeck 361 /*
250     Stephane Letz : letz@grame.fr
251     getopt_long_only does not exist on OSX : replaced by getopt_long for now.
252     */
253     res = getopt_long(argc, argv, "", long_options, &option_index);
254 schoenebeck 9 if(res == -1) break;
255     if (res == 0) {
256     switch(option_index) {
257 senkov 325 case 0: // --help
258     printf("usage: linuxsampler [OPTIONS]\n\n");
259     printf("--help prints this message\n");
260     printf("--version prints version information\n");
261     printf("--profile profile synthesis algorithms\n");
262     printf("--no-tune disable assembly optimization\n");
263 schoenebeck 420 printf("--statistics prints periodically statistics\n");
264 senkov 325 exit(EXIT_SUCCESS);
265 schoenebeck 9 break;
266 senkov 325 case 1: // --version
267 schoenebeck 328 printf("LinuxSampler %s\n", VERSION);
268     exit(EXIT_SUCCESS);
269 schoenebeck 9 break;
270 senkov 325 case 2: // --profile
271 persson 425 profile = true;
272 schoenebeck 20 break;
273 senkov 325 case 3: // --no-tune
274 persson 425 tune = false;
275 schoenebeck 9 break;
276 schoenebeck 420 case 4: // --statistics
277     bPrintStatistics = true;
278     break;
279 schoenebeck 9 }
280     }
281     }
282 senkov 325 }

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