/[svn]/linuxsampler/trunk/src/engines/AbstractEngineChannel.cpp
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Diff of /linuxsampler/trunk/src/engines/AbstractEngineChannel.cpp

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revision 2559 by schoenebeck, Sun May 18 17:38:25 2014 UTC revision 2596 by schoenebeck, Thu Jun 5 19:39:12 2014 UTC
# Line 46  namespace LinuxSampler { Line 46  namespace LinuxSampler {
46          ResetControllers();          ResetControllers();
47          PortamentoMode = false;          PortamentoMode = false;
48          PortamentoTime = CONFIG_PORTAMENTO_TIME_DEFAULT;          PortamentoTime = CONFIG_PORTAMENTO_TIME_DEFAULT;
49            pScriptEvents = NULL;
50      }      }
51    
52      AbstractEngineChannel::~AbstractEngineChannel() {      AbstractEngineChannel::~AbstractEngineChannel() {
53            unloadCurrentInstrumentScript();
54            if (pScriptEvents) delete pScriptEvents;
55          delete pEventQueue;          delete pEventQueue;
56          DeleteGroupEventLists();          DeleteGroupEventLists();
57          RemoveAllFxSends();          RemoveAllFxSends();
# Line 142  namespace LinuxSampler { Line 145  namespace LinuxSampler {
145      }      }
146    
147      /**      /**
148         * Loads the real-time instrument script given by @a text on this engine
149         * channel. A resource manager is used to allocate and share equivalent
150         * scripts on multiple engine channels.
151         *
152         * @param text - source code of script
153         */
154        void AbstractEngineChannel::loadInstrumentScript(const String& text) {
155            dmsg(1,("Loading real-time instrument script ... "));
156    
157            // hand back old script reference and VM execution contexts
158            // (if not done already)
159            unloadCurrentInstrumentScript();
160    
161            // get new script reference
162            script.parserContext = pEngine->scripts.Borrow(text, this);
163            if (!script.parserContext->errors().empty()) {
164                std::vector<ParserIssue> errors = script.parserContext->errors();
165                std::cerr << "[ScriptVM] Could not load instrument script, there were "
166                          << errors.size() << " parser errors:\n";
167                for (int i = 0; i < errors.size(); ++i)
168                    errors[i].dump();
169                return; // stop here if there were any parser errors
170            }
171    
172            script.handlerInit = script.parserContext->eventHandlerByName("init");
173            script.handlerNote = script.parserContext->eventHandlerByName("note");
174            script.handlerRelease = script.parserContext->eventHandlerByName("release");
175            script.handlerController = script.parserContext->eventHandlerByName("controller");
176            script.bHasValidScript =
177                script.handlerInit || script.handlerNote || script.handlerRelease ||
178                script.handlerController;
179    
180            // amount of script handlers each script event has to execute
181            int handlerExecCount = 0;
182            if (script.handlerInit) handlerExecCount++; // "init" handler is always executed before the actual event handler
183            if (script.handlerNote || script.handlerRelease || script.handlerController) // only one of these are executed after "init" handler
184                handlerExecCount++;
185    
186            // create script event pool (if it doesn't exist already)
187            if (!pScriptEvents)
188                pScriptEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
189    
190            // create new VM execution contexts for new script
191            while (!pScriptEvents->poolIsEmpty()) {
192                RTList<ScriptEvent>::Iterator it = pScriptEvents->allocAppend();
193                it->execCtx = pEngine->pScriptVM->createExecContext(
194                    script.parserContext
195                );
196                it->handlers = new VMEventHandler*[handlerExecCount+1];
197            }
198            pScriptEvents->clear();
199    
200            dmsg(1,("Done\n"));
201        }
202    
203        /**
204         * Unloads the currently used real-time instrument script on this sampler
205         * channel. A resource manager is used to share equivalent scripts among
206         * multiple sampler channels, and to deallocate the parsed script once not
207         * used on any engine channel anymore.
208         */
209        void AbstractEngineChannel::unloadCurrentInstrumentScript() {
210            if (script.parserContext)
211                dmsg(1,("Unloading current instrument script."));
212    
213            // free allocated VM execution contexts
214            if (pScriptEvents) {
215                pScriptEvents->clear();
216                while (!pScriptEvents->poolIsEmpty()) {
217                    RTList<ScriptEvent>::Iterator it = pScriptEvents->allocAppend();
218                    if (it->execCtx) {
219                        // free VM execution context object
220                        delete it->execCtx;
221                        it->execCtx = NULL;
222                        // free C array of handler pointers
223                        delete [] it->handlers;
224                    }
225                }
226                pScriptEvents->clear();
227            }
228            // hand back VM representation of script
229            if (script.parserContext) {
230                pEngine->scripts.HandBack(script.parserContext, this);
231                script.parserContext = NULL;
232                script.handlerInit = NULL;
233                script.handlerNote = NULL;
234                script.handlerRelease = NULL;
235                script.handlerController = NULL;
236            }
237            script.bHasValidScript = false;
238        }
239    
240        /**
241       * Implementation of virtual method from abstract EngineChannel interface.       * Implementation of virtual method from abstract EngineChannel interface.
242       * This method will periodically be polled (e.g. by the LSCP server) to       * This method will periodically be polled (e.g. by the LSCP server) to
243       * check if some engine channel parameter has changed since the last       * check if some engine channel parameter has changed since the last
# Line 791  namespace LinuxSampler { Line 887  namespace LinuxSampler {
887          }          }
888          eventQueueReader.free(); // free all copied events from input queue          eventQueueReader.free(); // free all copied events from input queue
889      }      }
890        
891        /**
892         * Called by real-time instrument script functions to schedule a new event
893         * somewhere in future.
894         */
895        void AbstractEngineChannel::ScheduleEvent(const Event* pEvent, int delay) { //TODO: delay not implemented yet
896            // since delay is not implemented yet, we simply add the new event
897            // to the event list of the current audio fragmet cycle for now
898            RTList<Event>::Iterator itEvent = pEvents->allocAppend();
899            if (itEvent) *itEvent = *pEvent; // copy event
900        }
901    
902      FxSend* AbstractEngineChannel::AddFxSend(uint8_t MidiCtrl, String Name) throw (Exception) {      FxSend* AbstractEngineChannel::AddFxSend(uint8_t MidiCtrl, String Name) throw (Exception) {
903          if (pEngine) pEngine->DisableAndLock();          if (pEngine) pEngine->DisableAndLock();
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