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/* |
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* Copyright (c) 2014 - 2021 Christian Schoenebeck |
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* |
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* http://www.linuxsampler.org |
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* |
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* This file is part of LinuxSampler and released under the same terms. |
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* See README file for details. |
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*/ |
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|
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#include "../../common/global_private.h" |
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#include "InstrumentScriptVM.h" |
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#include "../AbstractEngineChannel.h" |
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#include "../../common/global_private.h" |
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#include "AbstractInstrumentManager.h" |
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#include "MidiKeyboardManager.h" |
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#include "Fade.h" |
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|
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namespace LinuxSampler { |
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|
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/////////////////////////////////////////////////////////////////////// |
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// class 'EventGroup' |
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|
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void EventGroup::insert(vmint eventID) { |
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if (contains(eventID)) return; |
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|
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AbstractEngine* pEngine = m_script->pEngineChannel->pEngine; |
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|
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// before adding the new event ID, check if there are any dead events |
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// and remove them in that case, before otherwise we might run in danger |
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// to run out of free space on this group for event IDs if a lot of |
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// events die before being removed explicitly from the group by script |
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// |
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// NOTE: or should we do this "dead ones" check only once in a while? |
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ssize_t firstDead = -1; |
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for (size_t i = 0; i < size(); ++i) { |
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if (firstDead >= 0) { |
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if (pEngine->EventByID(eventID)) { |
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remove(firstDead, i - firstDead); |
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firstDead = -1; |
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} |
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} else { |
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if (!pEngine->EventByID(eventID)) firstDead = i; |
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} |
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} |
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if (firstDead >= 0) |
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remove(firstDead, size() - firstDead); |
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|
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append(eventID); |
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} |
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|
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void EventGroup::erase(vmint eventID) { |
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size_t index = find(eventID); |
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remove(index); |
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} |
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|
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/////////////////////////////////////////////////////////////////////// |
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// class 'InstrumentScript' |
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|
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InstrumentScript::InstrumentScript(AbstractEngineChannel* pEngineChannel) { |
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parserContext = NULL; |
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bHasValidScript = false; |
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handlerInit = NULL; |
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handlerNote = NULL; |
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handlerRelease = NULL; |
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handlerController = NULL; |
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handlerRpn = NULL; |
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handlerNrpn = NULL; |
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pEvents = NULL; |
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for (int i = 0; i < 128; ++i) |
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pKeyEvents[i] = NULL; |
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this->pEngineChannel = pEngineChannel; |
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for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) |
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eventGroups[i].setScript(this); |
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} |
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|
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InstrumentScript::~InstrumentScript() { |
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resetAll(); |
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if (pEvents) { |
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for (int i = 0; i < 128; ++i) delete pKeyEvents[i]; |
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delete pEvents; |
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} |
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} |
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|
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/** @brief Load real-time instrument script. |
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* |
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* Loads the real-time instrument script given by @a text on the engine |
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* channel this InstrumentScript object belongs to (defined by |
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* pEngineChannel member variable). The sampler engine's resource manager is |
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* used to allocate and share equivalent scripts on multiple engine |
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* channels. |
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* |
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* @param text - source code of script |
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* @param patchVars - 'patch' variables being overridden by instrument |
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*/ |
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void InstrumentScript::load(const String& text, |
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const std::map<String,String>& patchVars) |
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{ |
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dmsg(1,("Loading real-time instrument script ... ")); |
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|
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// hand back old script reference and VM execution contexts |
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// (if not done already) |
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unload(); |
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|
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code = text; |
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|
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AbstractInstrumentManager* pManager = |
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dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager()); |
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|
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/* |
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Get new script reference. |
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|
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Note: every engine channel now has its own compiled script object |
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(a.k.a. VMParserContext). Originally a compiled script was shared by |
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multiple engine channels. This was wrong: we cannot share compiled |
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script instances among multiple engine channels (parts), for two |
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reasons: |
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|
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1. VMParserContext not only encompasses the compiled tree |
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presentation of the requested script, but also global variables |
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and we don't want those global variables to be modified by |
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different sampler parts, as this would not be expected behaviour |
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by instrument script authors. |
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|
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2. If there is more than one sampler engine instance (e.g. if there |
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are multiple audio output device instances) this would even crash, |
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because each sampler engine instance has its own ScriptVM |
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instance, and a (VM)ParserContext is always tied to exactly one |
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ScriptVM instance. |
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|
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We would not be buying much by sharing compiled scripts anyway, as a |
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script usually compiles in couple microseconds and RAM usage is also |
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neglectable. |
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*/ |
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parserContext = pManager->scripts.Borrow({ |
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.code = text, |
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.patchVars = patchVars, |
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.engineChannel = pEngineChannel /* unique owner of script */ |
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}, |
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pEngineChannel /* who is asking to borrow */ |
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); |
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if (!parserContext->errors().empty()) { |
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std::vector<ParserIssue> errors = parserContext->errors(); |
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std::cerr << "[ScriptVM] Could not load instrument script, there were " |
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<< errors.size() << " parser errors:\n"; |
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for (int i = 0; i < errors.size(); ++i) |
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errors[i].dump(); |
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return; // stop here if there were any parser errors |
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} |
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|
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handlerInit = parserContext->eventHandlerByName("init"); |
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handlerNote = parserContext->eventHandlerByName("note"); |
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handlerRelease = parserContext->eventHandlerByName("release"); |
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handlerController = parserContext->eventHandlerByName("controller"); |
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handlerRpn = parserContext->eventHandlerByName("rpn"); |
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handlerNrpn = parserContext->eventHandlerByName("nrpn"); |
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bHasValidScript = |
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handlerInit || handlerNote || handlerRelease || handlerController || |
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handlerRpn || handlerNrpn; |
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|
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// amount of script handlers each script event has to execute |
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int handlerExecCount = 0; |
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if (handlerNote || handlerRelease || handlerController || handlerRpn || |
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handlerNrpn) // only one of these are executed after "init" handler |
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handlerExecCount++; |
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|
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// create script event pool (if it doesn't exist already) |
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if (!pEvents) { |
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pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT); |
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for (int i = 0; i < 128; ++i) |
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pKeyEvents[i] = new RTList<ScriptEvent>(pEvents); |
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// reset RTAVLNode's tree node member variables after nodes are allocated |
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// (since we can't use a constructor right now, we do that initialization here) |
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while (!pEvents->poolIsEmpty()) { |
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RTList<ScriptEvent>::Iterator it = pEvents->allocAppend(); |
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it->reset(); |
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} |
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} |
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pEvents->clear(); // outside of upper block, as loop below must always start from cleared list |
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|
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// create new VM execution contexts for new script |
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while (!pEvents->poolIsEmpty()) { |
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RTList<ScriptEvent>::Iterator it = pEvents->allocAppend(); |
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it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext( |
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parserContext |
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); |
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it->handlers = new VMEventHandler*[handlerExecCount+1]; |
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} |
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pEvents->clear(); |
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|
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dmsg(1,("Done\n")); |
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} |
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|
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/** @brief Unload real-time instrument script. |
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* |
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* Unloads the currently used real-time instrument script and frees all |
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* resources allocated for that script. The sampler engine's resource manager |
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* is used to share equivalent scripts among multiple sampler channels, and |
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* to deallocate the parsed script once not used on any engine channel |
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* anymore. |
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* |
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* Calling this method will however not clear the @c code member variable. |
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* Thus, the script can be parsed again afterwards. |
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*/ |
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void InstrumentScript::unload() { |
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//dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this)); |
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|
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if (parserContext) |
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dmsg(1,("Unloading current instrument script.\n")); |
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|
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resetEvents(); |
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|
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// free allocated VM execution contexts |
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if (pEvents) { |
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pEvents->clear(); |
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while (!pEvents->poolIsEmpty()) { |
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RTList<ScriptEvent>::Iterator it = pEvents->allocAppend(); |
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if (!it) break; |
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if (it->execCtx) { |
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// free VM execution context object |
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delete it->execCtx; |
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it->execCtx = NULL; |
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// free C array of handler pointers |
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delete [] it->handlers; |
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it->handlers = NULL; |
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} |
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} |
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pEvents->clear(); |
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} |
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// hand back VM representation of script |
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if (parserContext) { |
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AbstractInstrumentManager* pManager = |
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dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager()); |
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|
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pManager->scripts.HandBack(parserContext, pEngineChannel); |
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parserContext = NULL; |
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handlerInit = NULL; |
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handlerNote = NULL; |
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handlerRelease = NULL; |
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handlerController = NULL; |
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handlerRpn = NULL; |
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handlerNrpn = NULL; |
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} |
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bHasValidScript = false; |
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} |
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|
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/** |
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* Same as unload(), but this one also empties the @c code member variable |
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* to an empty string. |
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*/ |
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void InstrumentScript::resetAll() { |
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unload(); |
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code.clear(); |
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} |
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|
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/** |
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* Clears all currently active script events. This should be called |
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* whenever the engine or engine channel was reset for some reason. |
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*/ |
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void InstrumentScript::resetEvents() { |
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for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) |
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eventGroups[i].clear(); |
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|
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for (int i = 0; i < 128; ++i) |
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if (pKeyEvents[i]) |
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pKeyEvents[i]->clear(); |
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|
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suspendedEvents.clear(); |
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|
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if (pEvents) pEvents->clear(); |
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} |
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|
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/////////////////////////////////////////////////////////////////////// |
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// class 'InstrumentScriptVM' |
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|
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InstrumentScriptVM::InstrumentScriptVM() : |
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m_event(NULL), m_fnPlayNote(this), m_fnSetController(this), |
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m_fnSetRpn(this), m_fnSetNrpn(this), |
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m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this), |
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m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this), |
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m_fnChangeVol(this), m_fnChangeVolTime(this), |
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m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this), |
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m_fnChangePanTime(this), m_fnChangePanCurve(this), |
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m_fnChangeCutoff(this), m_fnChangeReso(this), m_fnChangeAttack(this), |
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m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this), |
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m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this), |
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m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this), |
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m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this), |
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m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this), |
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m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this), |
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m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this), |
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m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this), |
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m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this), |
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m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this), |
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m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this), |
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m_fnCallbackStatus(this), |
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m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this), |
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m_varCallbackChildID(this) |
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{ |
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m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable); |
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m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller); |
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m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id); |
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m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key); |
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m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity); |
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m_RPN_ADDRESS = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Parameter); |
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m_RPN_VALUE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Value); |
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m_KEY_DOWN.size = 128; |
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m_KEY_DOWN.readonly = true; |
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m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType); |
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m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls); |
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m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID); |
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} |
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|
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VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) { |
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AbstractEngineChannel* pEngineChannel = |
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static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel); |
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|
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// prepare built-in script variables for script execution |
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m_event = event; |
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m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0]; |
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m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0]; |
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|
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// if script is in start condition, then do mandatory MIDI event |
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// preprocessing tasks, which essentially means updating i.e. controller |
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// table with new CC value in case of a controller event, because the |
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// script might access the new CC value |
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if (!event->executionSlices) { |
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switch (event->cause.Type) { |
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case Event::type_control_change: |
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pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] = |
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event->cause.Param.CC.Value; |
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break; |
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case Event::type_channel_pressure: |
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pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] = |
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event->cause.Param.ChannelPressure.Value; |
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break; |
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case Event::type_pitchbend: |
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pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] = |
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event->cause.Param.Pitch.Pitch; |
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break; |
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default: |
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; // noop |
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} |
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} |
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|
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// run the script handler(s) |
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VMExecStatus_t res = VM_EXEC_NOT_RUNNING; |
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for ( ; event->handlers[event->currentHandler]; event->currentHandler++) { |
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res = ScriptVM::exec( |
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parserCtx, event->execCtx, event->handlers[event->currentHandler] |
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); |
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event->executionSlices++; |
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if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ... |
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// check if this script handler instance has any forked children |
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// to be auto aborted |
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for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER && |
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event->childHandlerID[iChild]; ++iChild) |
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{ |
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RTList<ScriptEvent>::Iterator itChild = |
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pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]); |
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if (itChild && itChild->autoAbortByParent) |
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itChild->execCtx->signalAbort(); |
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} |
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} |
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if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res; |
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} |
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|
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return res; |
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} |
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|
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std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() { |
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// first get built-in integer variables of derived VM class |
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std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables(); |
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|
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// now add own built-in variables |
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m["$CC_NUM"] = &m_CC_NUM; |
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m["$EVENT_ID"] = &m_EVENT_ID; |
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m["$EVENT_NOTE"] = &m_EVENT_NOTE; |
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m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY; |
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// m["$POLY_AT_NUM"] = &m_POLY_AT_NUM; |
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m["$RPN_ADDRESS"] = &m_RPN_ADDRESS; // used for both RPN and NRPN events |
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m["$RPN_VALUE"] = &m_RPN_VALUE; // used for both RPN and NRPN events |
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m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE; |
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m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT; |
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m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID; |
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|
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return m; |
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} |
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|
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std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() { |
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// first get built-in integer array variables of derived VM class |
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std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables(); |
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|
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// now add own built-in variables |
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m["%CC"] = &m_CC; |
395 |
m["%KEY_DOWN"] = &m_KEY_DOWN; |
396 |
//m["%POLY_AT"] = &m_POLY_AT; |
397 |
|
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return m; |
399 |
} |
400 |
|
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std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() { |
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// first get built-in integer variables of derived VM class |
403 |
std::map<String,vmint> m = ScriptVM::builtInConstIntVariables(); |
404 |
|
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m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE; |
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m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE; |
407 |
m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH; |
408 |
m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND; |
409 |
for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) { |
410 |
m["$MARK_" + ToString(i+1)] = i; |
411 |
} |
412 |
m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE; |
413 |
m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY; |
414 |
m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME; |
415 |
m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE; |
416 |
m["$EVENT_PAR_0"] = EVENT_PAR_0; |
417 |
m["$EVENT_PAR_1"] = EVENT_PAR_1; |
418 |
m["$EVENT_PAR_2"] = EVENT_PAR_2; |
419 |
m["$EVENT_PAR_3"] = EVENT_PAR_3; |
420 |
m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR; |
421 |
m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT; |
422 |
m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED; |
423 |
m["$CALLBACK_STATUS_QUEUE"] = CALLBACK_STATUS_QUEUE; |
424 |
m["$CALLBACK_STATUS_RUNNING"] = CALLBACK_STATUS_RUNNING; |
425 |
|
426 |
return m; |
427 |
} |
428 |
|
429 |
std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() { |
430 |
// first get built-in dynamic variables of derived VM class |
431 |
std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables(); |
432 |
|
433 |
m["%ALL_EVENTS"] = &m_varAllEvents; |
434 |
m["$ENGINE_UPTIME"] = &m_varEngineUptime; |
435 |
m["$NI_CALLBACK_ID"] = &m_varCallbackID; |
436 |
m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID; |
437 |
|
438 |
return m; |
439 |
} |
440 |
|
441 |
VMFunction* InstrumentScriptVM::functionByName(const String& name) { |
442 |
// built-in script functions of this class |
443 |
if (name == "play_note") return &m_fnPlayNote; |
444 |
else if (name == "set_controller") return &m_fnSetController; |
445 |
else if (name == "set_rpn") return &m_fnSetRpn; |
446 |
else if (name == "set_nrpn") return &m_fnSetNrpn; |
447 |
else if (name == "ignore_event") return &m_fnIgnoreEvent; |
448 |
else if (name == "ignore_controller") return &m_fnIgnoreController; |
449 |
else if (name == "note_off") return &m_fnNoteOff; |
450 |
else if (name == "set_event_mark") return &m_fnSetEventMark; |
451 |
else if (name == "delete_event_mark") return &m_fnDeleteEventMark; |
452 |
else if (name == "by_marks") return &m_fnByMarks; |
453 |
else if (name == "change_vol") return &m_fnChangeVol; |
454 |
else if (name == "change_vol_time") return &m_fnChangeVolTime; |
455 |
else if (name == "change_tune") return &m_fnChangeTune; |
456 |
else if (name == "change_tune_time") return &m_fnChangeTuneTime; |
457 |
else if (name == "change_note") return &m_fnChangeNote; |
458 |
else if (name == "change_velo") return &m_fnChangeVelo; |
459 |
else if (name == "change_pan") return &m_fnChangePan; |
460 |
else if (name == "change_pan_time") return &m_fnChangePanTime; |
461 |
else if (name == "change_pan_curve") return &m_fnChangePanCurve; |
462 |
else if (name == "change_cutoff") return &m_fnChangeCutoff; |
463 |
else if (name == "change_reso") return &m_fnChangeReso; |
464 |
else if (name == "change_attack") return &m_fnChangeAttack; |
465 |
else if (name == "change_decay") return &m_fnChangeDecay; |
466 |
else if (name == "change_sustain") return &m_fnChangeSustain; |
467 |
else if (name == "change_release") return &m_fnChangeRelease; |
468 |
else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack; |
469 |
else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay; |
470 |
else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain; |
471 |
else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease; |
472 |
else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth; |
473 |
else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq; |
474 |
else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth; |
475 |
else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq; |
476 |
else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth; |
477 |
else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq; |
478 |
else if (name == "fade_in") return &m_fnFadeIn; |
479 |
else if (name == "fade_out") return &m_fnFadeOut; |
480 |
else if (name == "change_vol_curve") return &m_fnChangeVolCurve; |
481 |
else if (name == "change_tune_curve") return &m_fnChangeTuneCurve; |
482 |
else if (name == "change_play_pos") return &m_fnChangePlayPos; |
483 |
else if (name == "get_event_par") return &m_fnGetEventPar; |
484 |
else if (name == "set_event_par") return &m_fnSetEventPar; |
485 |
else if (name == "event_status") return &m_fnEventStatus; |
486 |
else if (name == "wait") return &m_fnWait2; // override wait() core implementation |
487 |
else if (name == "stop_wait") return &m_fnStopWait; |
488 |
else if (name == "abort") return &m_fnAbort; |
489 |
else if (name == "fork") return &m_fnFork; |
490 |
else if (name == "callback_status") return &m_fnCallbackStatus; |
491 |
|
492 |
// built-in script functions of derived VM class |
493 |
return ScriptVM::functionByName(name); |
494 |
} |
495 |
|
496 |
} // namespace LinuxSampler |