/[svn]/linuxsampler/trunk/src/network/lscpserver.h
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revision 138 by senkov, Sun Jun 20 23:18:24 2004 UTC revision 1727 by iliev, Tue Apr 29 15:44:09 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 - 2008 Christian Schoenebeck                       *
7   *                                                                         *   *                                                                         *
8   *   This program 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  *
10   *   the Free Software Foundation; either version 2 of the License, or     *   *   the Free Software Foundation; either version 2 of the License, or     *
11   *   (at your option) any later version.                                   *   *   (at your option) any later version.                                   *
12   *                                                                         *   *                                                                         *
13   *   This program is distributed in the hope that it will be useful,       *   *   This library is distributed in the hope that it will be useful,       *
14   *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *   *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
15   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
16   *   GNU General Public License for more details.                          *   *   GNU General Public License for more details.                          *
17   *                                                                         *   *                                                                         *
18   *   You should have received a copy of the GNU General Public License     *   *   You should have received a copy of the GNU General Public License     *
19   *   along with this program; if not, write to the Free Software           *   *   along with this library; if not, write to the Free Software           *
20   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
21   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
22   ***************************************************************************/   ***************************************************************************/
# Line 23  Line 24 
24  #ifndef __LSCPSERVER_H_  #ifndef __LSCPSERVER_H_
25  #define __LSCPSERVER_H_  #define __LSCPSERVER_H_
26    
27    #if defined(WIN32)
28    #include <windows.h>
29    typedef int socklen_t;
30    #else
31  #include <unistd.h>  #include <unistd.h>
32  #include <sys/types.h>  #include <sys/types.h>
33  #include <sys/socket.h>  #include <sys/socket.h>
34    #include <sys/select.h>
35    #include <sys/time.h>
36  #include <netinet/in.h>  #include <netinet/in.h>
37  #include <netinet/tcp.h>  #include <netinet/tcp.h>
38  #include <arpa/inet.h>  #include <arpa/inet.h>
39  #include <netdb.h>  #include <netdb.h>
40    #endif
41    
42    #include <list>
43    
44  #include "lscp.h"  #include "lscp.h"
45  #include "lscpparser.h"  #include "lscpparser.h"
46    #include "lscp.h"
47    #include "lscpevent.h"
48  #include "../Sampler.h"  #include "../Sampler.h"
49  #include "../common/Thread.h"  #include "../common/Thread.h"
50    #include "../common/Mutex.h"
51    #include "../common/Condition.h"
52    #include "../common/global_private.h"
53    
54    #include "../drivers/midi/MidiInstrumentMapper.h"
55    #include "../drivers/midi/VirtualMidiDevice.h"
56    
57    #if HAVE_SQLITE3
58    #include "../db/InstrumentsDb.h"
59    #endif
60    
61  /// TCP Port on which the server should listen for connection requests.  /// TCP Port on which the server should listen for connection requests.
62    #define LSCP_ADDR INADDR_ANY
63  #define LSCP_PORT 8888  #define LSCP_PORT 8888
64    
65  using namespace LinuxSampler;  /// try up to 3 minutes to bind server socket
66    #define LSCP_SERVER_BIND_TIMEOUT 180
67    
68  /// Handle for a client connection (FIXME: doesn't work for more than one network connections of course, thus has to be included to the yyparse() parameters instead).  using namespace LinuxSampler;
 extern int hSession;  
69    
70  // External references to the main scanner and parser functions  // External references to the main scanner and parser functions
71  extern int yyparse(void* YYPARSE_PARAM);  extern int yyparse(void* YYPARSE_PARAM);
72  extern int yylex_init(yyscan_t* scanner);  extern void restart(yyparse_param_t* pparam, int& yychar);
 extern int yylex_destroy(yyscan_t yyscanner);  
73    
74  /**  /**
75   * Network server for the LinuxSampler Control Protocol (LSCP).   * Network server for the LinuxSampler Control Protocol (LSCP).
76   */   */
77  class LSCPServer : public Thread {  class LSCPServer : public Thread {
78      public:      public:
79          LSCPServer(Sampler* pSampler);          LSCPServer(Sampler* pSampler, long int addr, short int port);
80            virtual ~LSCPServer();
81            int WaitUntilInitialized(long TimeoutSeconds = 0L, long TimeoutNanoSeconds = 0L);
82    
83          // Methods called by the parser          // Methods called by the parser
         String CreateAudioOutputDevice(String Driver, std::map<String,String> Parameters = StringMap());  
84          String DestroyAudioOutputDevice(uint DeviceIndex);          String DestroyAudioOutputDevice(uint DeviceIndex);
85            String DestroyMidiInputDevice(uint DeviceIndex);
86          String LoadInstrument(String Filename, uint uiInstrument, uint uiSamplerChannel, bool bBackground = false);          String LoadInstrument(String Filename, uint uiInstrument, uint uiSamplerChannel, bool bBackground = false);
87          String LoadEngine(String EngineName, uint uiSamplerChannel);          String SetEngineType(String EngineName, uint uiSamplerChannel);
88          String GetChannels();          String GetChannels();
89            String ListChannels();
90          String AddChannel();          String AddChannel();
91          String RemoveChannel(uint uiSamplerChannel);          String RemoveChannel(uint uiSamplerChannel);
92          String GetAvailableEngines();          String GetAvailableEngines();
93            String ListAvailableEngines();
94          String GetEngineInfo(String EngineName);          String GetEngineInfo(String EngineName);
95          String GetChannelInfo(uint uiSamplerChannel);          String GetChannelInfo(uint uiSamplerChannel);
96          String GetVoiceCount(uint uiSamplerChannel);          String GetVoiceCount(uint uiSamplerChannel);
97          String GetStreamCount(uint uiSamplerChannel);          String GetStreamCount(uint uiSamplerChannel);
98          String GetBufferFill(fill_response_t ResponseType, uint uiSamplerChannel);          String GetBufferFill(fill_response_t ResponseType, uint uiSamplerChannel);
99          String GetAvailableAudioOutputDrivers();          String GetAvailableAudioOutputDrivers();
100            String ListAvailableAudioOutputDrivers();
101            String GetAvailableMidiInputDrivers();
102            String ListAvailableMidiInputDrivers();
103          String GetAudioOutputDriverInfo(String Driver);          String GetAudioOutputDriverInfo(String Driver);
104            String GetMidiInputDriverInfo(String Driver);
105  #ifdef __GNUC__  #ifdef __GNUC__
106          typedef std::map<String,String> StringMap; // nasty workaround for a GCC bug (see GCC bug #15980, #57)          typedef std::map<String,String> StringMap; // nasty workaround for a GCC bug (see GCC bug #15980, #57)
107          String GetAudioOutputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = StringMap());          String GetAudioOutputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = StringMap());
108            String GetMidiInputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = StringMap());
109            String CreateAudioOutputDevice(String Driver, std::map<String,String> Parameters = StringMap());
110            String CreateMidiInputDevice(String Driver, std::map<String,String> Parameters = StringMap());
111  #else  #else
112          String GetAudioOutputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = std::map<String,String>());          String GetAudioOutputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = std::map<String,String>());
113            String GetMidiInputDriverParameterInfo(String Driver, String Parameter, std::map<String,String> DependencyList = std::map<String,String>());
114            String CreateAudioOutputDevice(String Driver, std::map<String,String> Parameters = std::map<String,String>());
115            String CreateMidiInputDevice(String Driver, std::map<String,String> Parameters = std::map<String,String>());
116  #endif // __GNUC__  #endif // __GNUC__
117          String GetAudioOutputDeviceCount();          String GetAudioOutputDeviceCount();
118            String GetMidiInputDeviceCount();
119          String GetAudioOutputDevices();          String GetAudioOutputDevices();
120            String GetMidiInputDevices();
121          String GetAudioOutputDeviceInfo(uint DeviceIndex);          String GetAudioOutputDeviceInfo(uint DeviceIndex);
122            String GetMidiInputDeviceInfo(uint DeviceIndex);
123            String GetMidiInputPortInfo(uint DeviceIndex, uint PortIndex);
124            String GetMidiInputPortParameterInfo(uint DeviceId, uint PortId, String ParameterName);
125          String GetAudioOutputChannelInfo(uint DeviceId, uint ChannelId);          String GetAudioOutputChannelInfo(uint DeviceId, uint ChannelId);
126          String GetAudioOutputChannelParameterInfo(uint DeviceId, uint ChannelId, String ParameterName);          String GetAudioOutputChannelParameterInfo(uint DeviceId, uint ChannelId, String ParameterName);
127          String SetAudioOutputChannelParameter(uint DeviceId, uint ChannelId, String ParamKey, String ParamVal);          String SetAudioOutputChannelParameter(uint DeviceId, uint ChannelId, String ParamKey, String ParamVal);
128          String SetAudioOutputDeviceParameter(uint DeviceIndex, String ParamKey, String ParamVal);          String SetAudioOutputDeviceParameter(uint DeviceIndex, String ParamKey, String ParamVal);
129            String SetMidiInputDeviceParameter(uint DeviceIndex, String ParamKey, String ParamVal);
130            String SetMidiInputPortParameter(uint DeviceIndex, uint PortIndex, String ParamKey, String ParamVal);
131          String SetAudioOutputChannel(uint ChannelAudioOutputChannel, uint AudioOutputDeviceInputChannel, uint uiSamplerChannel);          String SetAudioOutputChannel(uint ChannelAudioOutputChannel, uint AudioOutputDeviceInputChannel, uint uiSamplerChannel);
         String SetMIDIInputType(String MidiInputDriver, uint uiSamplerChannel);  
         String SetMIDIInputPort(String MIDIInputPort, uint uiSamplerchannel);  
         String SetMIDIInputChannel(uint MIDIChannel, uint uiSamplerChannel);  
132          String SetAudioOutputDevice(uint AudioDeviceId, uint SamplerChannel);          String SetAudioOutputDevice(uint AudioDeviceId, uint SamplerChannel);
133          String SetVolume(double Volume, uint uiSamplerChannel);          String SetAudioOutputType(String AudioOutputDriver, uint uiSamplerChannel);
134            String SetMIDIInputPort(uint MIDIPort, uint uiSamplerChannel);
135            String SetMIDIInputChannel(uint MIDIChannel, uint uiSamplerChannel);
136            String SetMIDIInputDevice(uint MIDIDeviceId, uint uiSamplerChannel);
137            String SetMIDIInputType(String MidiInputDriver, uint uiSamplerChannel);
138            String SetMIDIInput(uint MIDIDeviceId, uint MIDIPort, uint MIDIChannel, uint uiSamplerChannel);
139            String SetVolume(double dVolume, uint uiSamplerChannel);
140            String SetChannelMute(bool bMute, uint uiSamplerChannel);
141            String SetChannelSolo(bool bSolo, uint uiSamplerChannel);
142            String AddOrReplaceMIDIInstrumentMapping(uint MidiMapID, uint MidiBank, uint MidiProg, String EngineType, String InstrumentFile, uint InstrumentIndex, float Volume, MidiInstrumentMapper::mode_t LoadMode, String Name, bool bModal);
143            String RemoveMIDIInstrumentMapping(uint MidiMapID, uint MidiBank, uint MidiProg);
144            String GetMidiInstrumentMappings(uint MidiMapID);
145            String GetAllMidiInstrumentMappings();
146            String GetMidiInstrumentMapping(uint MidiMapID, uint MidiBank, uint MidiProg);
147            String ListMidiInstrumentMappings(uint MidiMapID);
148            String ListAllMidiInstrumentMappings();
149            String ClearMidiInstrumentMappings(uint MidiMapID);
150            String ClearAllMidiInstrumentMappings();
151            String AddMidiInstrumentMap(String MapName = "");
152            String RemoveMidiInstrumentMap(uint MidiMapID);
153            String RemoveAllMidiInstrumentMaps();
154            String GetMidiInstrumentMaps();
155            String ListMidiInstrumentMaps();
156            String GetMidiInstrumentMap(uint MidiMapID);
157            String SetMidiInstrumentMapName(uint MidiMapID, String NewName);
158            String SetChannelMap(uint uiSamplerChannel, int MidiMapID);
159            String CreateFxSend(uint uiSamplerChannel, uint MidiCtrl, String Name = "");
160            String DestroyFxSend(uint uiSamplerChannel, uint FxSendID);
161            String GetFxSends(uint uiSamplerChannel);
162            String ListFxSends(uint uiSamplerChannel);
163            String GetFxSendInfo(uint uiSamplerChannel, uint FxSendID);
164            String SetFxSendName(uint uiSamplerChannel, uint FxSendID, String Name);
165            String SetFxSendAudioOutputChannel(uint uiSamplerChannel, uint FxSendID, uint FxSendChannel, uint DeviceChannel);
166            String SetFxSendMidiController(uint uiSamplerChannel, uint FxSendID, uint MidiController);
167            String SetFxSendLevel(uint uiSamplerChannel, uint FxSendID, double dLevel);
168            String AddDbInstrumentDirectory(String Dir);
169            String RemoveDbInstrumentDirectory(String Dir, bool Force = false);
170            String GetDbInstrumentDirectoryCount(String Dir, bool Recursive = false);
171            String GetDbInstrumentDirectories(String Dir, bool Recursive = false);
172            String GetDbInstrumentDirectoryInfo(String Dir);
173            String SetDbInstrumentDirectoryName(String Dir, String Name);
174            String MoveDbInstrumentDirectory(String Dir, String Dst);
175            String CopyDbInstrumentDirectory(String Dir, String Dst);
176            String SetDbInstrumentDirectoryDescription(String Dir, String Desc);
177            String FindDbInstrumentDirectories(String Dir, std::map<String,String> Parameters, bool Recursive = true);
178            String AddDbInstruments(String DbDir, String FilePath, int Index = -1, bool bBackground = false);
179            String AddDbInstruments(String ScanMode, String DbDir, String FsDir, bool bBackground = false);
180            String RemoveDbInstrument(String Instr);
181            String GetDbInstrumentCount(String Dir, bool Recursive = false);
182            String GetDbInstruments(String Dir, bool Recursive = false);
183            String GetDbInstrumentInfo(String Instr);
184            String SetDbInstrumentName(String Instr, String Name);
185            String MoveDbInstrument(String Instr, String Dst);
186            String CopyDbInstrument(String Instr, String Dst);
187            String SetDbInstrumentDescription(String Instr, String Desc);
188            String SetDbInstrumentFilePath(String OldPath, String NewPath);
189            String FindLostDbInstrumentFiles();
190            String FindDbInstruments(String Dir, std::map<String,String> Parameters, bool Recursive = true);
191            String FormatInstrumentsDb();
192            String EditSamplerChannelInstrument(uint uiSamplerChannel);
193            String GetDbInstrumentsJobInfo(int JobId);
194          String ResetChannel(uint uiSamplerChannel);          String ResetChannel(uint uiSamplerChannel);
195          String SubscribeNotification(event_t Event);          String ResetSampler();
196          String UnsubscribeNotification(event_t Event);          String GetServerInfo();
197            String GetTotalStreamCount();
198            String GetTotalVoiceCount();
199            String GetTotalVoiceCountMax();
200            String GetGlobalVolume();
201            String SetGlobalVolume(double dVolume);
202            String GetFileInstruments(String Filename);
203            String ListFileInstruments(String Filename);
204            String GetFileInstrumentInfo(String Filename, uint InstrumentID);
205            String SubscribeNotification(LSCPEvent::event_t);
206            String UnsubscribeNotification(LSCPEvent::event_t);
207            String SetEcho(yyparse_param_t* pSession, double boolean_value);
208          void   AnswerClient(String ReturnMessage);          void   AnswerClient(String ReturnMessage);
209    
210            static int currentSocket;
211            static std::map<int,String> bufferedCommands;
212    
213            static void SendLSCPNotify( LSCPEvent Event );
214            static int EventSubscribers( std::list<LSCPEvent::event_t> events );
215        static void LockRTNotify();
216        static void UnlockRTNotify();
217        static String FilterEndlines(String s);
218    
219      protected:      protected:
220          int            hSocket;          int            hSocket;
221          sockaddr_in    SocketAddress;          sockaddr_in    SocketAddress;
222          Sampler*       pSampler;          Sampler*       pSampler;
223            Condition      Initialized;
224    
225          int Main(); ///< Implementation of virtual method from class Thread          int Main(); ///< Implementation of virtual method from class Thread
226    
227      private:      private:
228    
229          /**          /**
230           * Converts a result_t structure into a valid LSCP answer message.           * Find a created audio output device index.
231           */           */
232          inline String ConvertResult(result_t result) {          int GetAudioOutputDeviceIndex (AudioOutputDevice *pDevice);
             switch (result.type) {  
                 case result_type_success: {  
                     return "OK\r\n";  
                 }  
                 case result_type_warning: {  
                     std::stringstream ss;  
                     ss << "WRN:" << result.code << ":" << result.message << "\r\n";  
                     return ss.str();  
                 }  
                 case result_type_error: {  
                     std::stringstream ss;  
                     ss << "ERR:" << result.code << ":" << result.message << "\r\n";  
                     return ss.str();  
                 }  
             }  
         }  
   
         template<class T> inline String ToString(T o) {  
             std::stringstream ss;  
             ss << o;  
             return ss.str();  
         }  
 };  
233    
234            /**
235             * Find a created midi input device index.
236             */
237            int GetMidiInputDeviceIndex (MidiInputDevice *pDevice);
238    
239  /**          EngineChannel* GetEngineChannel(uint uiSamplerChannel);
  * Instrument loader thread for the LinuxSampler Control Protocol (LSCP).  
  */  
 class LSCPLoadInstrument : public Thread {  
240    
241      public:                  /**
242          LSCPLoadInstrument(Engine* pEngine, String Filename, uint uiInstrument);                   * Gets the specified effect send on the specified sampler channel.
243                     */
244                    FxSend* GetFxSend(uint uiSamplerChannel, uint FxSendID);
245    
246            bool HasSoloChannel();
247            void MuteNonSoloChannels();
248            void UnmuteChannels();
249    
250      protected:          /**
251          // Instance variables.           * Throws an exception if the specified file is not found or
252          Engine* pEngine;           * if directory is specified.
253          String  Filename;           */
254          uint    uiInstrument;          static void VerifyFile(String Filename);
255    
256          // Implementation of virtual method from class Thread.          static std::map<int,String> bufferedNotifies;
257          int Main();          static Mutex NotifyMutex;
258            static Mutex NotifyBufferMutex;
259            static bool GetLSCPCommand( std::vector<yyparse_param_t>::iterator iter );
260            static void CloseConnection( std::vector<yyparse_param_t>::iterator iter );
261            static std::vector<yyparse_param_t> Sessions;
262            static Mutex SubscriptionMutex;
263            static std::map< LSCPEvent::event_t, std::list<int> > eventSubscriptions;
264            static fd_set fdSet;
265    
266            //Protect main thread that generates real time notify messages
267            //like voice count, stream count and buffer fill
268            //from LSCP server removing engines and channels from underneath
269            static Mutex RTNotifyMutex;
270    
271            class EventHandler : public ChannelCountListener, public AudioDeviceCountListener,
272                public MidiDeviceCountListener, public MidiInstrumentCountListener,
273                public MidiInstrumentInfoListener, public MidiInstrumentMapCountListener,
274                public MidiInstrumentMapInfoListener, public FxSendCountListener,
275                public VoiceCountListener, public StreamCountListener, public BufferFillListener,
276                public TotalStreamCountListener, public TotalVoiceCountListener,
277                public EngineChangeListener, public MidiPortCountListener {
278    
279                public:
280                    EventHandler(LSCPServer* pParent);
281    
282                    /**
283                     * Invoked when the number of sampler channels has changed.
284                     * @param NewCount The new number of sampler channels.
285                     */
286                    virtual void ChannelCountChanged(int NewCount);
287                    virtual void ChannelAdded(SamplerChannel* pChannel);
288                    virtual void ChannelToBeRemoved(SamplerChannel* pChannel);
289    
290                    /**
291                     * Invoked when the number of audio output devices has changed.
292                     * @param NewCount The new number of audio output devices.
293                     */
294                    virtual void AudioDeviceCountChanged(int NewCount);
295    
296                    /**
297                     * Invoked when the number of MIDI input devices has changed.
298                     * @param NewCount The new number of MIDI input devices.
299                     */
300                    virtual void MidiDeviceCountChanged(int NewCount);
301    
302                    /**
303                     * Invoked right before the supplied MIDI input device is going
304                     * to be destroyed.
305                     * @param pDevice MidiInputDevice to be deleted
306                     */
307                    virtual void MidiDeviceToBeDestroyed(MidiInputDevice* pDevice);
308    
309                    /**
310                     * Invoked to inform that a new MidiInputDevice has just been
311                     * created.
312                     * @param pDevice newly created MidiInputDevice
313                     */
314                    virtual void MidiDeviceCreated(MidiInputDevice* pDevice);
315    
316                    /**
317                     * Invoked when the number of MIDI input ports has changed.
318                     * @param NewCount The new number of MIDI input ports.
319                     */
320                    virtual void MidiPortCountChanged(int NewCount);
321    
322                    /**
323                     * Invoked right before the supplied MIDI input port is going
324                     * to be destroyed.
325                     * @param pPort MidiInputPort to be deleted
326                     */
327                    virtual void MidiPortToBeRemoved(MidiInputPort* pPort);
328    
329                    /**
330                     * Invoked to inform that a new MidiInputPort has just been
331                     * added.
332                     * @param pPort newly created MidiInputPort
333                     */
334                    virtual void MidiPortAdded(MidiInputPort* pPort);
335    
336                    /**
337                     * Invoked when the number of MIDI instruments has changed.
338                     * @param MapId The numerical ID of the MIDI instrument map.
339                     * @param NewCount The new number of MIDI instruments.
340                     */
341                    virtual void MidiInstrumentCountChanged(int MapId, int NewCount);
342    
343                    /**
344                     * Invoked when a MIDI instrument in a MIDI instrument map is changed.
345                     * @param MapId The numerical ID of the MIDI instrument map.
346                     * @param Bank The index of the MIDI bank, containing the instrument.
347                     * @param Program The MIDI program number of the instrument.
348                     */
349                    virtual void MidiInstrumentInfoChanged(int MapId, int Bank, int Program);
350    
351                    /**
352                     * Invoked when the number of MIDI instrument maps has changed.
353                     * @param NewCount The new number of MIDI instruments.
354                     */
355                    virtual void MidiInstrumentMapCountChanged(int NewCount);
356    
357                    /**
358                     * Invoked when the settings of a MIDI instrument map are changed.
359                     * @param MapId The numerical ID of the MIDI instrument map.
360                     */
361                    virtual void MidiInstrumentMapInfoChanged(int MapId);
362    
363                    /**
364                     * Invoked when the number of effect sends
365                     * on the specified sampler channel has changed.
366                     * @param ChannelId The numerical ID of the sampler channel.
367                     * @param NewCount The new number of effect sends.
368                     */
369                    virtual void FxSendCountChanged(int ChannelId, int NewCount);
370    
371                    /**
372                     * Invoked when the number of active voices
373                     * on the specified sampler channel has changed.
374                     * @param ChannelId The numerical ID of the sampler channel.
375                     * @param NewCount The new number of active voices.
376                     */
377                    virtual void VoiceCountChanged(int ChannelId, int NewCount);
378    
379                    /**
380                     * Invoked when the number of active disk streams
381                     * on the specified sampler channel has changed.
382                     * @param ChannelId The numerical ID of the sampler channel.
383                     * @param NewCount The new number of active disk streams.
384                     */
385                    virtual void StreamCountChanged(int ChannelId, int NewCount);
386    
387                    /**
388                     * Invoked when the fill state of the disk stream
389                     * buffers on the specified sampler channel is changed.
390                     * @param ChannelId The numerical ID of the sampler channel.
391                     * @param FillData The buffer fill data for the specified sampler channel.
392                     */
393                    virtual void BufferFillChanged(int ChannelId, String FillData);
394    
395                    /**
396                     * Invoked when the total number of active voices is changed.
397                     * @param NewCount The new number of active voices.
398                     */
399                    virtual void TotalVoiceCountChanged(int NewCount);
400                    virtual void TotalStreamCountChanged(int NewCount);
401    
402                    virtual void EngineToBeChanged(int ChannelId);
403                    virtual void EngineChanged(int ChannelId);
404    
405                    virtual ~EventHandler();
406    
407                    struct midi_listener_entry {
408                        SamplerChannel* pSamplerChannel;
409                        EngineChannel* pEngineChannel;
410                        VirtualMidiDevice* pMidiListener;
411                    };
412    
413                    std::vector<midi_listener_entry> channelMidiListeners;
414    
415                    struct device_midi_listener_entry {
416                        MidiInputPort* pPort;
417                        VirtualMidiDevice* pMidiListener;
418                        uint uiDeviceID;
419                    };
420    
421                    std::vector<device_midi_listener_entry> deviceMidiListeners;
422    
423                private:
424                    LSCPServer* pParent;
425            } eventHandler;
426    
427    #if HAVE_SQLITE3
428            class DbInstrumentsEventHandler : public InstrumentsDb::Listener {
429                public:
430                    virtual void DirectoryCountChanged(String Dir);
431                    virtual void DirectoryInfoChanged(String Dir);
432                    virtual void DirectoryNameChanged(String Dir, String NewName);
433                    virtual void InstrumentCountChanged(String Dir);
434                    virtual void InstrumentInfoChanged(String Instr);
435                    virtual void InstrumentNameChanged(String Instr, String NewName);
436                    virtual void JobStatusChanged(int JobId);
437            } dbInstrumentsEventHandler;
438    #endif // HAVE_SQLITE3
439  };  };
440    
441  #endif // __LSCPSERVER_H_  #endif // __LSCPSERVER_H_
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