/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVMFunctions.cpp
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revision 3246 by schoenebeck, Sun May 28 22:22:56 2017 UTC revision 3316 by schoenebeck, Thu Jul 20 12:05:53 2017 UTC
# Line 23  namespace LinuxSampler { Line 23  namespace LinuxSampler {
23      VMFnResult* InstrumentScriptVMFunction_play_note::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_play_note::exec(VMFnArgs* args) {
24          int note = args->arg(0)->asInt()->evalInt();          int note = args->arg(0)->asInt()->evalInt();
25          int velocity = (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : 127;          int velocity = (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : 127;
         int sampleoffset = (args->argsCount() >= 3) ? args->arg(2)->asInt()->evalInt() : 0;  
26          int duration = (args->argsCount() >= 4) ? args->arg(3)->asInt()->evalInt() : 0; //TODO: -1 might be a better default value instead of 0          int duration = (args->argsCount() >= 4) ? args->arg(3)->asInt()->evalInt() : 0; //TODO: -1 might be a better default value instead of 0
27    
28          if (note < 0 || note > 127) {          if (note < 0 || note > 127) {
# Line 36  namespace LinuxSampler { Line 35  namespace LinuxSampler {
35              return errorResult(0);              return errorResult(0);
36          }          }
37    
38          if (sampleoffset < 0) {          if (duration < -2) {
39              errMsg("play_note(): argument 3 may not be a negative sample offset");              errMsg("play_note(): argument 4 must be a duration value of at least -2 or higher");
             return errorResult(0);  
         } else if (sampleoffset != 0) {  
             wrnMsg("play_note(): argument 3 does not support a sample offset other than 0 yet");  
         }  
   
         if (duration < -1) {  
             errMsg("play_note(): argument 4 must be a duration value of at least -1 or higher");  
40              return errorResult(0);              return errorResult(0);
41          }          }
42    
# Line 63  namespace LinuxSampler { Line 55  namespace LinuxSampler {
55                  return errorResult(0);                  return errorResult(0);
56              }              }
57              e.Param.Note.ParentNoteID = m_vm->m_event->cause.Param.Note.ID;              e.Param.Note.ParentNoteID = m_vm->m_event->cause.Param.Note.ID;
58                // check if that requested parent note is actually still alive
59                NoteBase* pParentNote =
60                    pEngineChannel->pEngine->NoteByID( e.Param.Note.ParentNoteID );
61                // if parent note is already gone then this new note is not required anymore
62                if (!pParentNote)
63                    return successResult(0);
64          }          }
65    
66          const note_id_t id = pEngineChannel->ScheduleNoteMicroSec(&e, 0);          const note_id_t id = pEngineChannel->ScheduleNoteMicroSec(&e, 0);
67    
68            // if a sample offset is supplied, assign the offset as override
69            // to the previously created Note object
70            if (args->argsCount() >= 3) {
71                int sampleoffset = args->arg(2)->asInt()->evalInt();
72                if (sampleoffset >= 0) {
73                    NoteBase* pNote = pEngineChannel->pEngine->NoteByID(id);
74                    if (pNote) {
75                        pNote->Override.SampleOffset = sampleoffset;
76                    }
77                } else if (sampleoffset < -1) {
78                    errMsg("play_note(): sample offset of argument 3 may not be less than -1");
79                }
80            }
81    
82          // if a duration is supplied (and play-note event was scheduled          // if a duration is supplied (and play-note event was scheduled
83          // successfully above), then schedule a subsequent stop-note event          // successfully above), then schedule a subsequent stop-note event
84          if (id && duration > 0) {          if (id && duration > 0) {
# Line 826  namespace LinuxSampler { Line 838  namespace LinuxSampler {
838    
839      VMFnResult* InstrumentScriptVMFunction_change_attack::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_attack::exec(VMFnArgs* args) {
840          int attack = args->arg(1)->asInt()->evalInt();          int attack = args->arg(1)->asInt()->evalInt();
841          if (attack > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
842              wrnMsg("change_attack(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the attack time)
843              attack = VM_EG_PAR_MAX_VALUE;          if (attack < 0) {
         } else if (attack < 0) {  
844              wrnMsg("change_attack(): argument 2 may not be negative");              wrnMsg("change_attack(): argument 2 may not be negative");
845              attack = 0;              attack = 0;
846          }          }
# Line 913  namespace LinuxSampler { Line 924  namespace LinuxSampler {
924    
925      VMFnResult* InstrumentScriptVMFunction_change_decay::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_decay::exec(VMFnArgs* args) {
926          int decay = args->arg(1)->asInt()->evalInt();          int decay = args->arg(1)->asInt()->evalInt();
927          if (decay > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
928              wrnMsg("change_decay(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the decay time)
929              decay = VM_EG_PAR_MAX_VALUE;          if (decay < 0) {
         } else if (decay < 0) {  
930              wrnMsg("change_decay(): argument 2 may not be negative");              wrnMsg("change_decay(): argument 2 may not be negative");
931              decay = 0;              decay = 0;
932          }          }
# Line 1000  namespace LinuxSampler { Line 1010  namespace LinuxSampler {
1010    
1011      VMFnResult* InstrumentScriptVMFunction_change_release::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_release::exec(VMFnArgs* args) {
1012          int release = args->arg(1)->asInt()->evalInt();          int release = args->arg(1)->asInt()->evalInt();
1013          if (release > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
1014              wrnMsg("change_release(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the release time)
1015              release = VM_EG_PAR_MAX_VALUE;          if (release < 0) {
         } else if (release < 0) {  
1016              wrnMsg("change_release(): argument 2 may not be negative");              wrnMsg("change_release(): argument 2 may not be negative");
1017              release = 0;              release = 0;
1018          }          }
# Line 1165  namespace LinuxSampler { Line 1174  namespace LinuxSampler {
1174          return successResult();          return successResult();
1175      }      }
1176    
1177        // change_sustain() function
1178    
1179        VMFnResult* InstrumentScriptVMFunction_change_sustain::exec(VMFnArgs* args) {
1180            return VMChangeSynthParamFunction::execTemplate<
1181            &NoteBase::_Override::Sustain,
1182            Event::synth_param_sustain,
1183            true, 1000000, 0>( args, "change_sustain" );
1184        }
1185    
1186      // change_amp_lfo_depth() function      // change_amp_lfo_depth() function
1187    
1188      VMFnResult* InstrumentScriptVMFunction_change_amp_lfo_depth::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_amp_lfo_depth::exec(VMFnArgs* args) {
# Line 1793  namespace LinuxSampler { Line 1811  namespace LinuxSampler {
1811          return successResult();          return successResult();
1812      }      }
1813    
1814        // change_play_pos() function
1815    
1816        InstrumentScriptVMFunction_change_play_pos::InstrumentScriptVMFunction_change_play_pos(InstrumentScriptVM* parent)
1817        : m_vm(parent)
1818        {
1819        }
1820    
1821        VMFnResult* InstrumentScriptVMFunction_change_play_pos::exec(VMFnArgs* args) {
1822            const ScriptID id = args->arg(0)->asInt()->evalInt();
1823            if (!id) {
1824                wrnMsg("change_play_pos(): note ID for argument 1 may not be zero");
1825                return successResult();
1826            }
1827            if (!id.isNoteID()) {
1828                wrnMsg("change_play_pos(): argument 1 is not a note ID");
1829                return successResult();
1830            }
1831    
1832            const int pos = args->arg(1)->asInt()->evalInt();
1833            if (pos < 0) {
1834                wrnMsg("change_play_pos(): playback position of argument 2 may not be negative");
1835                return successResult();
1836            }
1837    
1838            AbstractEngineChannel* pEngineChannel =
1839                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1840    
1841            NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1842            if (!pNote) return successResult();
1843    
1844            pNote->Override.SampleOffset = pos;
1845    
1846            return successResult();
1847        }
1848    
1849      // event_status() function      // event_status() function
1850    
1851      InstrumentScriptVMFunction_event_status::InstrumentScriptVMFunction_event_status(InstrumentScriptVM* parent)      InstrumentScriptVMFunction_event_status::InstrumentScriptVMFunction_event_status(InstrumentScriptVM* parent)
# Line 1818  namespace LinuxSampler { Line 1871  namespace LinuxSampler {
1871          return successResult(pNote ? EVENT_STATUS_NOTE_QUEUE : EVENT_STATUS_INACTIVE);          return successResult(pNote ? EVENT_STATUS_NOTE_QUEUE : EVENT_STATUS_INACTIVE);
1872      }      }
1873    
1874        // callback_status() function
1875    
1876        InstrumentScriptVMFunction_callback_status::InstrumentScriptVMFunction_callback_status(InstrumentScriptVM* parent)
1877            : m_vm(parent)
1878        {
1879        }
1880    
1881        VMFnResult* InstrumentScriptVMFunction_callback_status::exec(VMFnArgs* args) {
1882            const script_callback_id_t id = args->arg(0)->asInt()->evalInt();
1883            if (!id) {
1884                wrnMsg("callback_status(): callback ID for argument 1 may not be zero");
1885                return successResult();
1886            }
1887    
1888            AbstractEngineChannel* pEngineChannel =
1889                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1890    
1891            RTList<ScriptEvent>::Iterator itCallback = pEngineChannel->ScriptCallbackByID(id);
1892            if (!itCallback)
1893                return successResult(CALLBACK_STATUS_TERMINATED);
1894    
1895            return successResult(
1896                (m_vm->m_event->execCtx == itCallback->execCtx) ?
1897                    CALLBACK_STATUS_RUNNING : CALLBACK_STATUS_QUEUE
1898            );
1899        }
1900    
1901      // wait() function (overrides core wait() implementation)      // wait() function (overrides core wait() implementation)
1902    
1903      InstrumentScriptVMFunction_wait::InstrumentScriptVMFunction_wait(InstrumentScriptVM* parent)      InstrumentScriptVMFunction_wait::InstrumentScriptVMFunction_wait(InstrumentScriptVM* parent)
# Line 1864  namespace LinuxSampler { Line 1944  namespace LinuxSampler {
1944          return successResult();          return successResult();
1945      }      }
1946    
1947        // abort() function
1948    
1949        InstrumentScriptVMFunction_abort::InstrumentScriptVMFunction_abort(InstrumentScriptVM* parent)
1950            : m_vm(parent)
1951        {
1952        }
1953    
1954        VMFnResult* InstrumentScriptVMFunction_abort::exec(VMFnArgs* args) {
1955            const script_callback_id_t id = args->arg(0)->asInt()->evalInt();
1956            if (!id) {
1957                wrnMsg("abort(): callback ID for argument 1 may not be zero");
1958                return successResult();
1959            }
1960    
1961            AbstractEngineChannel* pEngineChannel =
1962                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1963    
1964            RTList<ScriptEvent>::Iterator itCallback = pEngineChannel->ScriptCallbackByID(id);
1965            if (!itCallback) return successResult(); // ignore if callback is i.e. not alive anymore
1966    
1967            itCallback->execCtx->signalAbort();
1968    
1969            return successResult();
1970        }
1971    
1972        // fork() function
1973    
1974        InstrumentScriptVMFunction_fork::InstrumentScriptVMFunction_fork(InstrumentScriptVM* parent)
1975            : m_vm(parent)
1976        {
1977        }
1978    
1979        VMFnResult* InstrumentScriptVMFunction_fork::exec(VMFnArgs* args) {
1980            // check if this is actually the parent going to fork, or rather one of
1981            // the children which is already forked
1982            if (m_vm->m_event->forkIndex != 0) { // this is the entry point for a child ...
1983                int forkResult = m_vm->m_event->forkIndex;
1984                // reset so that this child may i.e. also call fork() later on
1985                m_vm->m_event->forkIndex = 0;
1986                return successResult(forkResult);
1987            }
1988    
1989            // if we are here, then this is the parent, so we must fork this parent
1990    
1991            const int n =
1992                (args->argsCount() >= 1) ? args->arg(0)->asInt()->evalInt() : 1;
1993            const bool bAutoAbort =
1994                (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : true;
1995    
1996            if (m_vm->m_event->countChildHandlers() + n > MAX_FORK_PER_SCRIPT_HANDLER) {
1997                wrnMsg("fork(): requested amount would exceed allowed limit per event handler");
1998                return successResult(-1);
1999            }
2000    
2001            AbstractEngineChannel* pEngineChannel =
2002                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
2003    
2004            if (!pEngineChannel->hasFreeScriptCallbacks(n)) {
2005                wrnMsg("fork(): global limit of event handlers exceeded");
2006                return successResult(-1);
2007            }
2008    
2009            for (int iChild = 0; iChild < n; ++iChild) {
2010                RTList<ScriptEvent>::Iterator itChild =
2011                    pEngineChannel->forkScriptCallback(m_vm->m_event, bAutoAbort);
2012                if (!itChild) { // should never happen, otherwise its a bug ...
2013                    errMsg("fork(): internal error while allocating child");
2014                    return errorResult(-1); // terminate script
2015                }
2016                // since both parent, as well all child script execution instances
2017                // all land in this exect() method, the following is (more or less)
2018                // the only feature that lets us distinguish the parent and
2019                // respective children from each other in this exect() method
2020                itChild->forkIndex = iChild + 1;
2021            }
2022    
2023            return successResult(0);
2024        }
2025    
2026  } // namespace LinuxSampler  } // namespace LinuxSampler
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