/[svn]/linuxsampler/trunk/src/network/lscpserver.cpp
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revision 1481 by senoner, Wed Nov 14 23:42:15 2007 UTC revision 1695 by schoenebeck, Sat Feb 16 01:09:33 2008 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *   *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 26  Line 26 
26  #include "lscpevent.h"  #include "lscpevent.h"
27    
28  #if defined(WIN32)  #if defined(WIN32)
29    #include <windows.h>
30  #else  #else
31  #include <fcntl.h>  #include <fcntl.h>
32  #endif  #endif
# Line 100  Mutex LSCPServer::NotifyBufferMutex = Mu Line 101  Mutex LSCPServer::NotifyBufferMutex = Mu
101  Mutex LSCPServer::SubscriptionMutex = Mutex();  Mutex LSCPServer::SubscriptionMutex = Mutex();
102  Mutex LSCPServer::RTNotifyMutex = Mutex();  Mutex LSCPServer::RTNotifyMutex = Mutex();
103    
104  LSCPServer::LSCPServer(Sampler* pSampler, long int addr, short int port) : Thread(true, false, 0, -4) {  LSCPServer::LSCPServer(Sampler* pSampler, long int addr, short int port) : Thread(true, false, 0, -4), eventHandler(this) {
105      SocketAddress.sin_family      = AF_INET;      SocketAddress.sin_family      = AF_INET;
106      SocketAddress.sin_addr.s_addr = addr;      SocketAddress.sin_addr.s_addr = addr;
107      SocketAddress.sin_port        = port;      SocketAddress.sin_port        = port;
# Line 126  LSCPServer::LSCPServer(Sampler* pSampler Line 127  LSCPServer::LSCPServer(Sampler* pSampler
127      LSCPEvent::RegisterEvent(LSCPEvent::event_db_instr_info, "DB_INSTRUMENT_INFO");      LSCPEvent::RegisterEvent(LSCPEvent::event_db_instr_info, "DB_INSTRUMENT_INFO");
128      LSCPEvent::RegisterEvent(LSCPEvent::event_db_instrs_job_info, "DB_INSTRUMENTS_JOB_INFO");      LSCPEvent::RegisterEvent(LSCPEvent::event_db_instrs_job_info, "DB_INSTRUMENTS_JOB_INFO");
129      LSCPEvent::RegisterEvent(LSCPEvent::event_misc, "MISCELLANEOUS");      LSCPEvent::RegisterEvent(LSCPEvent::event_misc, "MISCELLANEOUS");
130        LSCPEvent::RegisterEvent(LSCPEvent::event_total_stream_count, "TOTAL_STREAM_COUNT");
131      LSCPEvent::RegisterEvent(LSCPEvent::event_total_voice_count, "TOTAL_VOICE_COUNT");      LSCPEvent::RegisterEvent(LSCPEvent::event_total_voice_count, "TOTAL_VOICE_COUNT");
132      LSCPEvent::RegisterEvent(LSCPEvent::event_global_info, "GLOBAL_INFO");      LSCPEvent::RegisterEvent(LSCPEvent::event_global_info, "GLOBAL_INFO");
133        LSCPEvent::RegisterEvent(LSCPEvent::event_channel_midi, "CHANNEL_MIDI");
134        LSCPEvent::RegisterEvent(LSCPEvent::event_device_midi, "DEVICE_MIDI");
135      hSocket = -1;      hSocket = -1;
136  }  }
137    
# Line 139  LSCPServer::~LSCPServer() { Line 143  LSCPServer::~LSCPServer() {
143  #endif  #endif
144  }  }
145    
146    LSCPServer::EventHandler::EventHandler(LSCPServer* pParent) {
147        this->pParent = pParent;
148    }
149    
150    LSCPServer::EventHandler::~EventHandler() {
151        std::vector<midi_listener_entry> l = channelMidiListeners;
152        channelMidiListeners.clear();
153        for (int i = 0; i < l.size(); i++)
154            delete l[i].pMidiListener;
155    }
156    
157  void LSCPServer::EventHandler::ChannelCountChanged(int NewCount) {  void LSCPServer::EventHandler::ChannelCountChanged(int NewCount) {
158      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, NewCount));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_channel_count, NewCount));
159  }  }
160    
161    void LSCPServer::EventHandler::ChannelAdded(SamplerChannel* pChannel) {
162        pChannel->AddEngineChangeListener(this);
163    }
164    
165    void LSCPServer::EventHandler::ChannelToBeRemoved(SamplerChannel* pChannel) {
166        if (!pChannel->GetEngineChannel()) return;
167        EngineToBeChanged(pChannel->Index());
168    }
169    
170    void LSCPServer::EventHandler::EngineToBeChanged(int ChannelId) {
171        SamplerChannel* pSamplerChannel =
172            pParent->pSampler->GetSamplerChannel(ChannelId);
173        if (!pSamplerChannel) return;
174        EngineChannel* pEngineChannel =
175            pSamplerChannel->GetEngineChannel();
176        if (!pEngineChannel) return;
177        for (std::vector<midi_listener_entry>::iterator iter = channelMidiListeners.begin(); iter != channelMidiListeners.end(); ++iter) {
178            if ((*iter).pEngineChannel == pEngineChannel) {
179                VirtualMidiDevice* pMidiListener = (*iter).pMidiListener;
180                pEngineChannel->Disconnect(pMidiListener);
181                channelMidiListeners.erase(iter);
182                delete pMidiListener;
183                return;
184            }
185        }
186    }
187    
188    void LSCPServer::EventHandler::EngineChanged(int ChannelId) {
189        SamplerChannel* pSamplerChannel =
190            pParent->pSampler->GetSamplerChannel(ChannelId);
191        if (!pSamplerChannel) return;
192        EngineChannel* pEngineChannel =
193            pSamplerChannel->GetEngineChannel();
194        if (!pEngineChannel) return;
195        VirtualMidiDevice* pMidiListener = new VirtualMidiDevice;
196        pEngineChannel->Connect(pMidiListener);
197        midi_listener_entry entry = {
198            pSamplerChannel, pEngineChannel, pMidiListener
199        };
200        channelMidiListeners.push_back(entry);
201    }
202    
203  void LSCPServer::EventHandler::AudioDeviceCountChanged(int NewCount) {  void LSCPServer::EventHandler::AudioDeviceCountChanged(int NewCount) {
204      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_audio_device_count, NewCount));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_audio_device_count, NewCount));
205  }  }
# Line 151  void LSCPServer::EventHandler::MidiDevic Line 208  void LSCPServer::EventHandler::MidiDevic
208      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_midi_device_count, NewCount));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_midi_device_count, NewCount));
209  }  }
210    
211    void LSCPServer::EventHandler::MidiDeviceToBeDestroyed(MidiInputDevice* pDevice) {
212        pDevice->RemoveMidiPortCountListener(this);
213        for (int i = 0; i < pDevice->PortCount(); ++i)
214            MidiPortToBeRemoved(pDevice->GetPort(i));
215    }
216    
217    void LSCPServer::EventHandler::MidiDeviceCreated(MidiInputDevice* pDevice) {
218        pDevice->AddMidiPortCountListener(this);
219        for (int i = 0; i < pDevice->PortCount(); ++i)
220            MidiPortAdded(pDevice->GetPort(i));
221    }
222    
223    void LSCPServer::EventHandler::MidiPortCountChanged(int NewCount) {
224        // yet unused
225    }
226    
227    void LSCPServer::EventHandler::MidiPortToBeRemoved(MidiInputPort* pPort) {
228        for (std::vector<device_midi_listener_entry>::iterator iter = deviceMidiListeners.begin(); iter != deviceMidiListeners.end(); ++iter) {
229            if ((*iter).pPort == pPort) {
230                VirtualMidiDevice* pMidiListener = (*iter).pMidiListener;
231                pPort->Disconnect(pMidiListener);
232                deviceMidiListeners.erase(iter);
233                delete pMidiListener;
234                return;
235            }
236        }
237    }
238    
239    void LSCPServer::EventHandler::MidiPortAdded(MidiInputPort* pPort) {
240        // find out the device ID
241        std::map<uint, MidiInputDevice*> devices =
242            pParent->pSampler->GetMidiInputDevices();
243        for (
244            std::map<uint, MidiInputDevice*>::iterator iter = devices.begin();
245            iter != devices.end(); ++iter
246        ) {
247            if (iter->second == pPort->GetDevice()) { // found
248                VirtualMidiDevice* pMidiListener = new VirtualMidiDevice;
249                pPort->Connect(pMidiListener);
250                device_midi_listener_entry entry = {
251                    pPort, pMidiListener, iter->first
252                };
253                deviceMidiListeners.push_back(entry);
254                return;
255            }
256        }
257    }
258    
259  void LSCPServer::EventHandler::MidiInstrumentCountChanged(int MapId, int NewCount) {  void LSCPServer::EventHandler::MidiInstrumentCountChanged(int MapId, int NewCount) {
260      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_midi_instr_count, MapId, NewCount));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_midi_instr_count, MapId, NewCount));
261  }  }
# Line 187  void LSCPServer::EventHandler::TotalVoic Line 292  void LSCPServer::EventHandler::TotalVoic
292      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_total_voice_count, NewCount));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_total_voice_count, NewCount));
293  }  }
294    
295    void LSCPServer::EventHandler::TotalStreamCountChanged(int NewCount) {
296        LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_total_stream_count, NewCount));
297    }
298    
299  #if HAVE_SQLITE3  #if HAVE_SQLITE3
300  void LSCPServer::DbInstrumentsEventHandler::DirectoryCountChanged(String Dir) {  void LSCPServer::DbInstrumentsEventHandler::DirectoryCountChanged(String Dir) {
301      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_db_instr_dir_count, InstrumentsDb::toEscapedPath(Dir)));      LSCPServer::SendLSCPNotify(LSCPEvent(LSCPEvent::event_db_instr_dir_count, InstrumentsDb::toEscapedPath(Dir)));
# Line 283  int LSCPServer::Main() { Line 392  int LSCPServer::Main() {
392      pSampler->AddVoiceCountListener(&eventHandler);      pSampler->AddVoiceCountListener(&eventHandler);
393      pSampler->AddStreamCountListener(&eventHandler);      pSampler->AddStreamCountListener(&eventHandler);
394      pSampler->AddBufferFillListener(&eventHandler);      pSampler->AddBufferFillListener(&eventHandler);
395        pSampler->AddTotalStreamCountListener(&eventHandler);
396      pSampler->AddTotalVoiceCountListener(&eventHandler);      pSampler->AddTotalVoiceCountListener(&eventHandler);
397      pSampler->AddFxSendCountListener(&eventHandler);      pSampler->AddFxSendCountListener(&eventHandler);
398      MidiInstrumentMapper::AddMidiInstrumentCountListener(&eventHandler);      MidiInstrumentMapper::AddMidiInstrumentCountListener(&eventHandler);
# Line 302  int LSCPServer::Main() { Line 412  int LSCPServer::Main() {
412      timeval timeout;      timeval timeout;
413    
414      while (true) {      while (true) {
415            #if CONFIG_PTHREAD_TESTCANCEL
416                    TestCancel();
417            #endif
418          // check if some engine channel's parameter / status changed, if so notify the respective LSCP event subscribers          // check if some engine channel's parameter / status changed, if so notify the respective LSCP event subscribers
419          {          {
420              std::set<EngineChannel*> engineChannels = EngineChannelFactory::EngineChannelInstances();              std::set<EngineChannel*> engineChannels = EngineChannelFactory::EngineChannelInstances();
# Line 323  int LSCPServer::Main() { Line 436  int LSCPServer::Main() {
436              }              }
437          }          }
438    
439            // check if MIDI data arrived on some engine channel
440            for (int i = 0; i < eventHandler.channelMidiListeners.size(); ++i) {
441                const EventHandler::midi_listener_entry entry =
442                    eventHandler.channelMidiListeners[i];
443                VirtualMidiDevice* pMidiListener = entry.pMidiListener;
444                if (pMidiListener->NotesChanged()) {
445                    for (int iNote = 0; iNote < 128; iNote++) {
446                        if (pMidiListener->NoteChanged(iNote)) {
447                            const bool bActive = pMidiListener->NoteIsActive(iNote);
448                            LSCPServer::SendLSCPNotify(
449                                LSCPEvent(
450                                    LSCPEvent::event_channel_midi,
451                                    entry.pSamplerChannel->Index(),
452                                    std::string(bActive ? "NOTE_ON" : "NOTE_OFF"),
453                                    iNote,
454                                    bActive ? pMidiListener->NoteOnVelocity(iNote)
455                                            : pMidiListener->NoteOffVelocity(iNote)
456                                )
457                            );
458                        }
459                    }
460                }
461            }
462    
463            // check if MIDI data arrived on some MIDI device
464            for (int i = 0; i < eventHandler.deviceMidiListeners.size(); ++i) {
465                const EventHandler::device_midi_listener_entry entry =
466                    eventHandler.deviceMidiListeners[i];
467                VirtualMidiDevice* pMidiListener = entry.pMidiListener;
468                if (pMidiListener->NotesChanged()) {
469                    for (int iNote = 0; iNote < 128; iNote++) {
470                        if (pMidiListener->NoteChanged(iNote)) {
471                            const bool bActive = pMidiListener->NoteIsActive(iNote);
472                            LSCPServer::SendLSCPNotify(
473                                LSCPEvent(
474                                    LSCPEvent::event_device_midi,
475                                    entry.uiDeviceID,
476                                    entry.pPort->GetPortNumber(),
477                                    std::string(bActive ? "NOTE_ON" : "NOTE_OFF"),
478                                    iNote,
479                                    bActive ? pMidiListener->NoteOnVelocity(iNote)
480                                            : pMidiListener->NoteOffVelocity(iNote)
481                                )
482                            );
483                        }
484                    }
485                }
486            }
487    
488          //Now let's deliver late notifies (if any)          //Now let's deliver late notifies (if any)
489          NotifyBufferMutex.Lock();          NotifyBufferMutex.Lock();
490          for (std::map<int,String>::iterator iterNotify = bufferedNotifies.begin(); iterNotify != bufferedNotifies.end(); iterNotify++) {          for (std::map<int,String>::iterator iterNotify = bufferedNotifies.begin(); iterNotify != bufferedNotifies.end(); iterNotify++) {
# Line 367  int LSCPServer::Main() { Line 529  int LSCPServer::Main() {
529                    std::cerr << "LSCPServer: ioctlsocket: set FIONBIO failed. Error " << WSAGetLastError() << std::endl;                    std::cerr << "LSCPServer: ioctlsocket: set FIONBIO failed. Error " << WSAGetLastError() << std::endl;
530                    exit(EXIT_FAILURE);                    exit(EXIT_FAILURE);
531                  }                  }
532          #else                    #else
533                  if (fcntl(socket, F_SETFL, O_NONBLOCK)) {                  if (fcntl(socket, F_SETFL, O_NONBLOCK)) {
534                          std::cerr << "LSCPServer: F_SETFL O_NONBLOCK failed." << std::endl;                          std::cerr << "LSCPServer: F_SETFL O_NONBLOCK failed." << std::endl;
535                          exit(EXIT_FAILURE);                          exit(EXIT_FAILURE);
# Line 439  void LSCPServer::CloseConnection( std::v Line 601  void LSCPServer::CloseConnection( std::v
601          NotifyMutex.Unlock();          NotifyMutex.Unlock();
602  }  }
603    
604    void LSCPServer::LockRTNotify() {
605        RTNotifyMutex.Lock();
606    }
607    
608    void LSCPServer::UnlockRTNotify() {
609        RTNotifyMutex.Unlock();
610    }
611    
612  int LSCPServer::EventSubscribers( std::list<LSCPEvent::event_t> events ) {  int LSCPServer::EventSubscribers( std::list<LSCPEvent::event_t> events ) {
613          int subs = 0;          int subs = 0;
614          SubscriptionMutex.Lock();          SubscriptionMutex.Lock();
# Line 538  bool LSCPServer::GetLSCPCommand( std::ve Line 708  bool LSCPServer::GetLSCPCommand( std::ve
708                      int wsa_lasterror = WSAGetLastError();                      int wsa_lasterror = WSAGetLastError();
709                          if (wsa_lasterror == WSAEWOULDBLOCK) //Would block, try again later.                          if (wsa_lasterror == WSAEWOULDBLOCK) //Would block, try again later.
710                                  return false;                                  return false;
711                          dmsg(2,("LSCPScanner: Socket error after recv() Error %d.\n", wsa_lasterror));                            dmsg(2,("LSCPScanner: Socket error after recv() Error %d.\n", wsa_lasterror));
712                          CloseConnection(iter);                          CloseConnection(iter);
713                          break;                          break;
714                  }                  }
# Line 2346  String LSCPServer::GetServerInfo() { Line 2516  String LSCPServer::GetServerInfo() {
2516  }  }
2517    
2518  /**  /**
2519     * Will be called by the parser to return the current number of all active streams.
2520     */
2521    String LSCPServer::GetTotalStreamCount() {
2522        dmsg(2,("LSCPServer: GetTotalStreamCount()\n"));
2523        LSCPResultSet result;
2524        result.Add(pSampler->GetDiskStreamCount());
2525        return result.Produce();
2526    }
2527    
2528    /**
2529   * Will be called by the parser to return the current number of all active voices.   * Will be called by the parser to return the current number of all active voices.
2530   */   */
2531  String LSCPServer::GetTotalVoiceCount() {  String LSCPServer::GetTotalVoiceCount() {
# Line 2383  String LSCPServer::SetGlobalVolume(doubl Line 2563  String LSCPServer::SetGlobalVolume(doubl
2563      return result.Produce();      return result.Produce();
2564  }  }
2565    
2566    String LSCPServer::GetFileInstruments(String Filename) {
2567        dmsg(2,("LSCPServer: GetFileInstruments(String Filename=%s)\n",Filename.c_str()));
2568        LSCPResultSet result;
2569        try {
2570            VerifyFile(Filename);
2571        } catch (Exception e) {
2572            result.Error(e);
2573            return result.Produce();
2574        }
2575        // try to find a sampler engine that can handle the file
2576        bool bFound = false;
2577        std::vector<String> engineTypes = EngineFactory::AvailableEngineTypes();
2578        for (int i = 0; !bFound && i < engineTypes.size(); i++) {
2579            Engine* pEngine = NULL;
2580            try {
2581                pEngine = EngineFactory::Create(engineTypes[i]);
2582                if (!pEngine) throw Exception("Internal error: could not create '" + engineTypes[i] + "' engine");
2583                InstrumentManager* pManager = pEngine->GetInstrumentManager();
2584                if (pManager) {
2585                    std::vector<InstrumentManager::instrument_id_t> IDs =
2586                        pManager->GetInstrumentFileContent(Filename);
2587                    // return the amount of instruments in the file
2588                    result.Add(IDs.size());
2589                    // no more need to ask other engine types
2590                    bFound = true;
2591                } else dmsg(1,("Warning: engine '%s' does not provide an instrument manager\n", engineTypes[i].c_str()));
2592            } catch (Exception e) {
2593                // NOOP, as exception is thrown if engine doesn't support file
2594            }
2595            if (pEngine) EngineFactory::Destroy(pEngine);
2596        }
2597    
2598        if (!bFound) result.Error("Unknown file format");
2599        return result.Produce();
2600    }
2601    
2602    String LSCPServer::ListFileInstruments(String Filename) {
2603        dmsg(2,("LSCPServer: ListFileInstruments(String Filename=%s)\n",Filename.c_str()));
2604        LSCPResultSet result;
2605        try {
2606            VerifyFile(Filename);
2607        } catch (Exception e) {
2608            result.Error(e);
2609            return result.Produce();
2610        }
2611        // try to find a sampler engine that can handle the file
2612        bool bFound = false;
2613        std::vector<String> engineTypes = EngineFactory::AvailableEngineTypes();
2614        for (int i = 0; !bFound && i < engineTypes.size(); i++) {
2615            Engine* pEngine = NULL;
2616            try {
2617                pEngine = EngineFactory::Create(engineTypes[i]);
2618                if (!pEngine) throw Exception("Internal error: could not create '" + engineTypes[i] + "' engine");
2619                InstrumentManager* pManager = pEngine->GetInstrumentManager();
2620                if (pManager) {
2621                    std::vector<InstrumentManager::instrument_id_t> IDs =
2622                        pManager->GetInstrumentFileContent(Filename);
2623                    // return a list of IDs of the instruments in the file
2624                    String s;
2625                    for (int j = 0; j < IDs.size(); j++) {
2626                        if (s.size()) s += ",";
2627                        s += ToString(IDs[j].Index);
2628                    }
2629                    result.Add(s);
2630                    // no more need to ask other engine types
2631                    bFound = true;
2632                } else dmsg(1,("Warning: engine '%s' does not provide an instrument manager\n", engineTypes[i].c_str()));
2633            } catch (Exception e) {
2634                // NOOP, as exception is thrown if engine doesn't support file
2635            }
2636            if (pEngine) EngineFactory::Destroy(pEngine);
2637        }
2638    
2639        if (!bFound) result.Error("Unknown file format");
2640        return result.Produce();
2641    }
2642    
2643    String LSCPServer::GetFileInstrumentInfo(String Filename, uint InstrumentID) {
2644        dmsg(2,("LSCPServer: GetFileInstrumentInfo(String Filename=%s, InstrumentID=%d)\n",Filename.c_str(),InstrumentID));
2645        LSCPResultSet result;
2646        try {
2647            VerifyFile(Filename);
2648        } catch (Exception e) {
2649            result.Error(e);
2650            return result.Produce();
2651        }
2652        InstrumentManager::instrument_id_t id;
2653        id.FileName = Filename;
2654        id.Index    = InstrumentID;
2655        // try to find a sampler engine that can handle the file
2656        bool bFound = false;
2657        bool bFatalErr = false;
2658        std::vector<String> engineTypes = EngineFactory::AvailableEngineTypes();
2659        for (int i = 0; !bFound && !bFatalErr && i < engineTypes.size(); i++) {
2660            Engine* pEngine = NULL;
2661            try {
2662                pEngine = EngineFactory::Create(engineTypes[i]);
2663                if (!pEngine) throw Exception("Internal error: could not create '" + engineTypes[i] + "' engine");
2664                InstrumentManager* pManager = pEngine->GetInstrumentManager();
2665                if (pManager) {
2666                    // check if the instrument index is valid
2667                    // FIXME: this won't work if an engine only supports parts of the instrument file
2668                    std::vector<InstrumentManager::instrument_id_t> IDs =
2669                        pManager->GetInstrumentFileContent(Filename);
2670                    if (std::find(IDs.begin(), IDs.end(), id) == IDs.end()) {
2671                        std::stringstream ss;
2672                        ss << "Invalid instrument index " << InstrumentID << " for instrument file '" << Filename << "'";
2673                        bFatalErr = true;
2674                        throw Exception(ss.str());
2675                    }
2676                    // get the info of the requested instrument
2677                    InstrumentManager::instrument_info_t info =
2678                        pManager->GetInstrumentInfo(id);
2679                    // return detailed informations about the file
2680                    result.Add("NAME", info.InstrumentName);
2681                    result.Add("FORMAT_FAMILY", engineTypes[i]);
2682                    result.Add("FORMAT_VERSION", info.FormatVersion);
2683                    result.Add("PRODUCT", info.Product);
2684                    result.Add("ARTISTS", info.Artists);
2685                    // no more need to ask other engine types
2686                    bFound = true;
2687                } else dmsg(1,("Warning: engine '%s' does not provide an instrument manager\n", engineTypes[i].c_str()));
2688            } catch (Exception e) {
2689                // usually NOOP, as exception is thrown if engine doesn't support file
2690                if (bFatalErr) result.Error(e);
2691            }
2692            if (pEngine) EngineFactory::Destroy(pEngine);
2693        }
2694    
2695        if (!bFound && !bFatalErr) result.Error("Unknown file format");
2696        return result.Produce();
2697    }
2698    
2699    void LSCPServer::VerifyFile(String Filename) {
2700        #if WIN32
2701        WIN32_FIND_DATA win32FileAttributeData;
2702        BOOL res = GetFileAttributesEx( Filename.c_str(), GetFileExInfoStandard, &win32FileAttributeData );
2703        if (!res) {
2704            std::stringstream ss;
2705            ss << "File does not exist, GetFileAttributesEx failed `" << Filename << "`: Error " << GetLastError();
2706            throw Exception(ss.str());
2707        }
2708        if ( win32FileAttributeData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) {
2709            throw Exception("Directory is specified");
2710        }
2711        #else
2712        struct stat statBuf;
2713        int res = stat(Filename.c_str(), &statBuf);
2714        if (res) {
2715            std::stringstream ss;
2716            ss << "Fail to stat `" << Filename << "`: " << strerror(errno);
2717            throw Exception(ss.str());
2718        }
2719    
2720        if (S_ISDIR(statBuf.st_mode)) {
2721            throw Exception("Directory is specified");
2722        }
2723        #endif
2724    }
2725    
2726  /**  /**
2727   * Will be called by the parser to subscribe a client (frontend) on the   * Will be called by the parser to subscribe a client (frontend) on the
2728   * server for receiving event messages.   * server for receiving event messages.
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