engines/gig/Engine.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
 *   Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "Engine.h"
#include "EngineChannel.h"
#include "InstrumentScriptVM.h"

namespace LinuxSampler { namespace gig {
    Engine::Format Engine::GetEngineFormat() { return GIG; }

    void Engine::CreateInstrumentScriptVM() {
        dmsg(2,("gig::Engine created Giga format scriptvm\n"));
        if (pScriptVM) return;
        pScriptVM = new InstrumentScriptVM; // gig format specific extended script runner
    }

    /**
     *  Reacts on supported control change commands (e.g. pitch bend wheel,
     *  modulation wheel, aftertouch).
     *
     *  @param pEngineChannel - engine channel on which this event occured on
     *  @param itControlChangeEvent - controller, value and time stamp of the event
     */
    void Engine::ProcessControlChange (
        LinuxSampler::EngineChannel*  pEngineChannel,
        Pool<Event>::Iterator&        itControlChangeEvent
    ) {
        dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));

        EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
        // handle the "control triggered" MIDI rule: a control change
        // event can trigger a new note on or note off event
        if (pChannel->pInstrument) {

            ::gig::MidiRule* rule;
            for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {

                if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
                    dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
                    if (itControlChangeEvent->Param.CC.Controller ==
                        ctrlTrigger->ControllerNumber) {

                        uint8_t oldCCValue = pChannel->ControllerTable[
                            itControlChangeEvent->Param.CC.Controller];
                        uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;

                        for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
                            ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
                                  &ctrlTrigger->pTriggers[i];

                            // check if the controller has passed the
                            // trigger point in the right direction
                            if ((pTrigger->Descending &&
                                 oldCCValue > pTrigger->TriggerPoint &&
                                 newCCValue <= pTrigger->TriggerPoint) ||
                                (!pTrigger->Descending &&
                                 oldCCValue < pTrigger->TriggerPoint &&
                                 newCCValue >= pTrigger->TriggerPoint)) {

                                RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
                                if (itNewEvent) {
                                    *itNewEvent = *itControlChangeEvent;
                                    itNewEvent->Param.Note.Key = pTrigger->Key;

                                    if (pTrigger->NoteOff || pTrigger->Velocity == 0) {
                                        itNewEvent->Type = Event::type_note_off;
                                        itNewEvent->Param.Note.Velocity = 100;

                                        ProcessNoteOff(pEngineChannel, itNewEvent);
                                    } else {
                                        itNewEvent->Type = Event::type_note_on;
                                        //TODO: if Velocity is 255, the triggered velocity should
                                        // depend on how fast the controller is moving
                                        itNewEvent->Param.Note.Velocity =
                                            pTrigger->Velocity == 255 ? 100 :
                                            pTrigger->Velocity;

                                        ProcessNoteOn(pEngineChannel, itNewEvent);
                                    }
                                }
                                else dmsg(1,("Event pool emtpy!\n"));
                            }
                        }
                    }
                }
            }
        }

        // update controller value in the engine channel's controller table
        pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;

        ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);

        // handle FX send controllers
        ProcessFxSendControllers(pChannel, itControlChangeEvent);
    }

    void Engine::ProcessChannelPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itChannelPressureEvent) {
        // forward this to the CC routine, so it updates the current aftertouch value and may handle aftertouch trigger rules
        ProcessControlChange(pEngineChannel, itChannelPressureEvent);

        // if required: engine global aftertouch handling (apart from the per voice handling)
    }

    void Engine::ProcessPolyphonicKeyPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNotePressureEvent) {
        // if required: engine global aftertouch handling (apart from the per voice handling)
    }

    DiskThread* Engine::CreateDiskThread() {
        return new DiskThread (
            iMaxDiskStreams,
            ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
            &instruments
        );
    }

    void Engine::TriggerNewVoices (
        LinuxSampler::EngineChannel* pEngineChannel,
        RTList<Event>::Iterator&     itNoteOnEvent,
        bool                         HandleKeyGroupConflicts
    ) {
        NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
        if (!itNote) {
            dmsg(1,("gig::Engine: No Note object for triggering new voices!\n"));
            return;
        }

        EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);

        // first, get total amount of required voices (dependant on amount of layers)
        // (using the note's MIDI note number instead of the MIDI event's one,
        //  because an instrument script might have modified the note number)
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNote->cause.Param.Note.Key);
        if (!pRegion || RegionSuspended(pRegion))
            return;
        const int voicesRequired = pRegion->Layers;
        if (voicesRequired <= 0)
            return;

        // now launch the required amount of voices
        for (int i = 0; i < voicesRequired; i++) {
            VoiceIterator itNewVoice =
                LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
            if (!itNewVoice) continue;
            itNewVoice.moveToEndOf(itNote->pActiveVoices);
        }
    }

    void Engine::TriggerReleaseVoices (
        LinuxSampler::EngineChannel*  pEngineChannel,
        RTList<Event>::Iterator&      itNoteOffEvent
    ) {
        NoteIterator itNote = GetNotePool()->fromID(itNoteOffEvent->Param.Note.ID);
        if (!itNote) {
            dmsg(1,("gig::Engine: No Note object for triggering new release voices!\n"));
            return;
        }

        EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
        MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
        // first, get total amount of required voices (dependant on amount of layers)
        // (using the note's MIDI note number instead of the MIDI event's one,
        //  because an instrument script might have modified the note number)
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNote->cause.Param.Note.Key);
        if (!pRegion)
            return;
        const int voicesRequired = pRegion->Layers;
        if (voicesRequired <= 0)
            return;

        // MIDI note-on velocity is used instead of note-off velocity
        itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;

        // now launch the required amount of voices
        for (int i = 0; i < voicesRequired; i++) {
            VoiceIterator itNewVoice =
                LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
            if (!itNewVoice) continue;
            itNewVoice.moveToEndOf(itNote->pActiveVoices);
        }
    }

    Pool<Voice>::Iterator Engine::LaunchVoice (
        LinuxSampler::EngineChannel*  pEngineChannel,
        Pool<Event>::Iterator&        itNoteOnEvent,
        int                           iLayer,
        bool                          ReleaseTriggerVoice,
        bool                          VoiceStealing,
        bool                          HandleKeyGroupConflicts
    ) {
        NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
        if (!itNote) {
            dmsg(1,("gig::Engine: No Note object for launching voices!\n"));
            return Pool<Voice>::Iterator();
        }

        EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
        // the note's MIDI note number might differ from the event's note number
        // because a script might have modified the note's note number
        int MIDIKey = itNoteOnEvent->Param.Note.Key;
        int NoteKey = itNote->cause.Param.Note.Key;
        //EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(NoteKey);

        // if nothing defined for this key
        if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do

        int iKeyGroup = pRegion->KeyGroup;
        // only need to send a group event from the first voice in a layered region,
        // as all layers in a region always belongs to the same key group
        if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);

        Voice::type_t VoiceType = Voice::type_normal;

        // get current dimension values to select the right dimension region
        //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
        //FIXME: controller values for selecting the dimension region here are currently not sample accurate
        uint DimValues[8] = { 0 };
        for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
            switch (pRegion->pDimensionDefinitions[i].dimension) {
                case ::gig::dimension_samplechannel:
                    DimValues[i] = 0; //TODO: we currently ignore this dimension
                    break;
                case ::gig::dimension_layer:
                    DimValues[i] = iLayer;
                    break;
                case ::gig::dimension_velocity:
                    DimValues[i] = itNote->cause.Param.Note.Velocity;
                    break;
                case ::gig::dimension_channelaftertouch:
                    DimValues[i] = pChannel->ControllerTable[128];
                    break;
                case ::gig::dimension_releasetrigger:
                    VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
                    DimValues[i] = (uint) ReleaseTriggerVoice;
                    break;
                case ::gig::dimension_keyboard:
                    DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
                    break;
                case ::gig::dimension_roundrobin:
                    DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
                    break;
                case ::gig::dimension_roundrobinkeyboard:
                    DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
                    break;
                case ::gig::dimension_random:
                    DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
                    break;
                case ::gig::dimension_smartmidi:
                    DimValues[i] = 0;
                    break;
                case ::gig::dimension_modwheel:
                    DimValues[i] = pChannel->ControllerTable[1];
                    break;
                case ::gig::dimension_breath:
                    DimValues[i] = pChannel->ControllerTable[2];
                    break;
                case ::gig::dimension_foot:
                    DimValues[i] = pChannel->ControllerTable[4];
                    break;
                case ::gig::dimension_portamentotime:
                    DimValues[i] = pChannel->ControllerTable[5];
                    break;
                case ::gig::dimension_effect1:
                    DimValues[i] = pChannel->ControllerTable[12];
                    break;
                case ::gig::dimension_effect2:
                    DimValues[i] = pChannel->ControllerTable[13];
                    break;
                case ::gig::dimension_genpurpose1:
                    DimValues[i] = pChannel->ControllerTable[16];
                    break;
                case ::gig::dimension_genpurpose2:
                    DimValues[i] = pChannel->ControllerTable[17];
                    break;
                case ::gig::dimension_genpurpose3:
                    DimValues[i] = pChannel->ControllerTable[18];
                    break;
                case ::gig::dimension_genpurpose4:
                    DimValues[i] = pChannel->ControllerTable[19];
                    break;
                case ::gig::dimension_sustainpedal:
                    DimValues[i] = pChannel->ControllerTable[64];
                    break;
                case ::gig::dimension_portamento:
                    DimValues[i] = pChannel->ControllerTable[65];
                    break;
                case ::gig::dimension_sostenutopedal:
                    DimValues[i] = pChannel->ControllerTable[66];
                    break;
                case ::gig::dimension_softpedal:
                    DimValues[i] = pChannel->ControllerTable[67];
                    break;
                case ::gig::dimension_genpurpose5:
                    DimValues[i] = pChannel->ControllerTable[80];
                    break;
                case ::gig::dimension_genpurpose6:
                    DimValues[i] = pChannel->ControllerTable[81];
                    break;
                case ::gig::dimension_genpurpose7:
                    DimValues[i] = pChannel->ControllerTable[82];
                    break;
                case ::gig::dimension_genpurpose8:
                    DimValues[i] = pChannel->ControllerTable[83];
                    break;
                case ::gig::dimension_effect1depth:
                    DimValues[i] = pChannel->ControllerTable[91];
                    break;
                case ::gig::dimension_effect2depth:
                    DimValues[i] = pChannel->ControllerTable[92];
                    break;
                case ::gig::dimension_effect3depth:
                    DimValues[i] = pChannel->ControllerTable[93];
                    break;
                case ::gig::dimension_effect4depth:
                    DimValues[i] = pChannel->ControllerTable[94];
                    break;
                case ::gig::dimension_effect5depth:
                    DimValues[i] = pChannel->ControllerTable[95];
                    break;
                case ::gig::dimension_none:
                    std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
                    break;
                default:
                    std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
            }
        }

        // return if this is a release triggered voice and there is no
        // releasetrigger dimension (could happen if an instrument
        // change has occured between note on and off)
        if (ReleaseTriggerVoice && !(VoiceType & Voice::type_release_trigger)) return Pool<Voice>::Iterator();

        ::gig::DimensionRegion* pDimRgn;
        if (!itNote->Format.Gig.DimMask) { // normal case ...
            pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
        } else { // some dimension zones were overridden (i.e. by instrument script) ...
            dmsg(3,("trigger with dim mask=%d val=%d\n", itNote->Format.Gig.DimMask, itNote->Format.Gig.DimBits));
            int index = pRegion->GetDimensionRegionIndexByValue(DimValues);
            index &= ~itNote->Format.Gig.DimMask;
            index |=  itNote->Format.Gig.DimBits & itNote->Format.Gig.DimMask;
            pDimRgn = pRegion->pDimensionRegions[index & 255];
        }
        if (!pDimRgn) return Pool<Voice>::Iterator(); // error (could not resolve dimension region)

        // no need to continue if sample is silent
        if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
        
        dmsg(2,("sample -> \"%s\"\n", pDimRgn->pSample->pInfo->Name.c_str()));

        // allocate a new voice for the key
        Pool<Voice>::Iterator itNewVoice = GetVoicePool()->allocAppend();

        int res = InitNewVoice (
                pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
                iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
        );
        if (!res) return itNewVoice;

        return Pool<Voice>::Iterator(); // no free voice or error
    }

    bool Engine::DiskStreamSupported() {
        return true;
    }

    String Engine::Description() {
        return "GigaSampler Format Engine";
    }

    String Engine::Version() {
        String s = "$Revision$";
        return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
    }

}} // namespace LinuxSampler::gig
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005-2008 Christian Schoenebeck *
7	* Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev *
8	* *
9	* This program is free software; you can redistribute it and/or modify *
10	* it under the terms of the GNU General Public License as published by *
11	* the Free Software Foundation; either version 2 of the License, or *
12	* (at your option) any later version. *
13	* *
14	* This program is distributed in the hope that it will be useful, *
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17	* GNU General Public License for more details. *
18	* *
19	* You should have received a copy of the GNU General Public License *
20	* along with this program; if not, write to the Free Software *
21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22	* MA 02111-1307 USA *
23	***************************************************************************/
24
25	#include "Engine.h"
26	#include "EngineChannel.h"
27	#include "InstrumentScriptVM.h"
28
29	namespace LinuxSampler { namespace gig {
30	Engine::Format Engine::GetEngineFormat() { return GIG; }
31
32	void Engine::CreateInstrumentScriptVM() {
33	dmsg(2,("gig::Engine created Giga format scriptvm\n"));
34	if (pScriptVM) return;
35	pScriptVM = new InstrumentScriptVM; // gig format specific extended script runner
36	}
37
38	/**
39	* Reacts on supported control change commands (e.g. pitch bend wheel,
40	* modulation wheel, aftertouch).
41	*
42	* @param pEngineChannel - engine channel on which this event occured on
43	* @param itControlChangeEvent - controller, value and time stamp of the event
44	*/
45	void Engine::ProcessControlChange (
46	LinuxSampler::EngineChannel* pEngineChannel,
47	Pool<Event>::Iterator& itControlChangeEvent
48	) {
49	dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
50
51	EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
52	// handle the "control triggered" MIDI rule: a control change
53	// event can trigger a new note on or note off event
54	if (pChannel->pInstrument) {
55
56	::gig::MidiRule* rule;
57	for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
58
59	if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
60	dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
61	if (itControlChangeEvent->Param.CC.Controller ==
62	ctrlTrigger->ControllerNumber) {
63
64	uint8_t oldCCValue = pChannel->ControllerTable[
65	itControlChangeEvent->Param.CC.Controller];
66	uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
67
68	for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
69	::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
70	&ctrlTrigger->pTriggers[i];
71
72	// check if the controller has passed the
73	// trigger point in the right direction
74	if ((pTrigger->Descending &&
75	oldCCValue > pTrigger->TriggerPoint &&
76	newCCValue <= pTrigger->TriggerPoint) \|\|
77	(!pTrigger->Descending &&
78	oldCCValue < pTrigger->TriggerPoint &&
79	newCCValue >= pTrigger->TriggerPoint)) {
80
81	RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
82	if (itNewEvent) {
83	itNewEvent = itControlChangeEvent;
84	itNewEvent->Param.Note.Key = pTrigger->Key;
85
86	if (pTrigger->NoteOff \|\| pTrigger->Velocity == 0) {
87	itNewEvent->Type = Event::type_note_off;
88	itNewEvent->Param.Note.Velocity = 100;
89
90	ProcessNoteOff(pEngineChannel, itNewEvent);
91	} else {
92	itNewEvent->Type = Event::type_note_on;
93	//TODO: if Velocity is 255, the triggered velocity should
94	// depend on how fast the controller is moving
95	itNewEvent->Param.Note.Velocity =
96	pTrigger->Velocity == 255 ? 100 :
97	pTrigger->Velocity;
98
99	ProcessNoteOn(pEngineChannel, itNewEvent);
100	}
101	}
102	else dmsg(1,("Event pool emtpy!\n"));
103	}
104	}
105	}
106	}
107	}
108	}
109
110	// update controller value in the engine channel's controller table
111	pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
112
113	ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
114
115	// handle FX send controllers
116	ProcessFxSendControllers(pChannel, itControlChangeEvent);
117	}
118
119	void Engine::ProcessChannelPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itChannelPressureEvent) {
120	// forward this to the CC routine, so it updates the current aftertouch value and may handle aftertouch trigger rules
121	ProcessControlChange(pEngineChannel, itChannelPressureEvent);
122
123	// if required: engine global aftertouch handling (apart from the per voice handling)
124	}
125
126	void Engine::ProcessPolyphonicKeyPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNotePressureEvent) {
127	// if required: engine global aftertouch handling (apart from the per voice handling)
128	}
129
130	DiskThread* Engine::CreateDiskThread() {
131	return new DiskThread (
132	iMaxDiskStreams,
133	((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
134	&instruments
135	);
136	}
137
138	void Engine::TriggerNewVoices (
139	LinuxSampler::EngineChannel* pEngineChannel,
140	RTList<Event>::Iterator& itNoteOnEvent,
141	bool HandleKeyGroupConflicts
142	) {
143	NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
144	if (!itNote) {
145	dmsg(1,("gig::Engine: No Note object for triggering new voices!\n"));
146	return;
147	}
148
149	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
150
151	// first, get total amount of required voices (dependant on amount of layers)
152	// (using the note's MIDI note number instead of the MIDI event's one,
153	// because an instrument script might have modified the note number)
154	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNote->cause.Param.Note.Key);
155	if (!pRegion \|\| RegionSuspended(pRegion))
156	return;
157	const int voicesRequired = pRegion->Layers;
158	if (voicesRequired <= 0)
159	return;
160
161	// now launch the required amount of voices
162	for (int i = 0; i < voicesRequired; i++) {
163	VoiceIterator itNewVoice =
164	LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
165	if (!itNewVoice) continue;
166	itNewVoice.moveToEndOf(itNote->pActiveVoices);
167	}
168	}
169
170	void Engine::TriggerReleaseVoices (
171	LinuxSampler::EngineChannel* pEngineChannel,
172	RTList<Event>::Iterator& itNoteOffEvent
173	) {
174	NoteIterator itNote = GetNotePool()->fromID(itNoteOffEvent->Param.Note.ID);
175	if (!itNote) {
176	dmsg(1,("gig::Engine: No Note object for triggering new release voices!\n"));
177	return;
178	}
179
180	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
181	MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
182	// first, get total amount of required voices (dependant on amount of layers)
183	// (using the note's MIDI note number instead of the MIDI event's one,
184	// because an instrument script might have modified the note number)
185	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNote->cause.Param.Note.Key);
186	if (!pRegion)
187	return;
188	const int voicesRequired = pRegion->Layers;
189	if (voicesRequired <= 0)
190	return;
191
192	// MIDI note-on velocity is used instead of note-off velocity
193	itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
194
195	// now launch the required amount of voices
196	for (int i = 0; i < voicesRequired; i++) {
197	VoiceIterator itNewVoice =
198	LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
199	if (!itNewVoice) continue;
200	itNewVoice.moveToEndOf(itNote->pActiveVoices);
201	}
202	}
203
204	Pool<Voice>::Iterator Engine::LaunchVoice (
205	LinuxSampler::EngineChannel* pEngineChannel,
206	Pool<Event>::Iterator& itNoteOnEvent,
207	int iLayer,
208	bool ReleaseTriggerVoice,
209	bool VoiceStealing,
210	bool HandleKeyGroupConflicts
211	) {
212	NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
213	if (!itNote) {
214	dmsg(1,("gig::Engine: No Note object for launching voices!\n"));
215	return Pool<Voice>::Iterator();
216	}
217
218	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
219	// the note's MIDI note number might differ from the event's note number
220	// because a script might have modified the note's note number
221	int MIDIKey = itNoteOnEvent->Param.Note.Key;
222	int NoteKey = itNote->cause.Param.Note.Key;
223	//EngineChannel::MidiKey* pKey = &pChannel->pMIDIKeyInfo[MIDIKey];
224	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(NoteKey);
225
226	// if nothing defined for this key
227	if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
228
229	int iKeyGroup = pRegion->KeyGroup;
230	// only need to send a group event from the first voice in a layered region,
231	// as all layers in a region always belongs to the same key group
232	if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
233
234	Voice::type_t VoiceType = Voice::type_normal;
235
236	// get current dimension values to select the right dimension region
237	//TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
238	//FIXME: controller values for selecting the dimension region here are currently not sample accurate
239	uint DimValues[8] = { 0 };
240	for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
241	switch (pRegion->pDimensionDefinitions[i].dimension) {
242	case ::gig::dimension_samplechannel:
243	DimValues[i] = 0; //TODO: we currently ignore this dimension
244	break;
245	case ::gig::dimension_layer:
246	DimValues[i] = iLayer;
247	break;
248	case ::gig::dimension_velocity:
249	DimValues[i] = itNote->cause.Param.Note.Velocity;
250	break;
251	case ::gig::dimension_channelaftertouch:
252	DimValues[i] = pChannel->ControllerTable[128];
253	break;
254	case ::gig::dimension_releasetrigger:
255	VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
256	DimValues[i] = (uint) ReleaseTriggerVoice;
257	break;
258	case ::gig::dimension_keyboard:
259	DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
260	break;
261	case ::gig::dimension_roundrobin:
262	DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
263	break;
264	case ::gig::dimension_roundrobinkeyboard:
265	DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
266	break;
267	case ::gig::dimension_random:
268	DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
269	break;
270	case ::gig::dimension_smartmidi:
271	DimValues[i] = 0;
272	break;
273	case ::gig::dimension_modwheel:
274	DimValues[i] = pChannel->ControllerTable[1];
275	break;
276	case ::gig::dimension_breath:
277	DimValues[i] = pChannel->ControllerTable[2];
278	break;
279	case ::gig::dimension_foot:
280	DimValues[i] = pChannel->ControllerTable[4];
281	break;
282	case ::gig::dimension_portamentotime:
283	DimValues[i] = pChannel->ControllerTable[5];
284	break;
285	case ::gig::dimension_effect1:
286	DimValues[i] = pChannel->ControllerTable[12];
287	break;
288	case ::gig::dimension_effect2:
289	DimValues[i] = pChannel->ControllerTable[13];
290	break;
291	case ::gig::dimension_genpurpose1:
292	DimValues[i] = pChannel->ControllerTable[16];
293	break;
294	case ::gig::dimension_genpurpose2:
295	DimValues[i] = pChannel->ControllerTable[17];
296	break;
297	case ::gig::dimension_genpurpose3:
298	DimValues[i] = pChannel->ControllerTable[18];
299	break;
300	case ::gig::dimension_genpurpose4:
301	DimValues[i] = pChannel->ControllerTable[19];
302	break;
303	case ::gig::dimension_sustainpedal:
304	DimValues[i] = pChannel->ControllerTable[64];
305	break;
306	case ::gig::dimension_portamento:
307	DimValues[i] = pChannel->ControllerTable[65];
308	break;
309	case ::gig::dimension_sostenutopedal:
310	DimValues[i] = pChannel->ControllerTable[66];
311	break;
312	case ::gig::dimension_softpedal:
313	DimValues[i] = pChannel->ControllerTable[67];
314	break;
315	case ::gig::dimension_genpurpose5:
316	DimValues[i] = pChannel->ControllerTable[80];
317	break;
318	case ::gig::dimension_genpurpose6:
319	DimValues[i] = pChannel->ControllerTable[81];
320	break;
321	case ::gig::dimension_genpurpose7:
322	DimValues[i] = pChannel->ControllerTable[82];
323	break;
324	case ::gig::dimension_genpurpose8:
325	DimValues[i] = pChannel->ControllerTable[83];
326	break;
327	case ::gig::dimension_effect1depth:
328	DimValues[i] = pChannel->ControllerTable[91];
329	break;
330	case ::gig::dimension_effect2depth:
331	DimValues[i] = pChannel->ControllerTable[92];
332	break;
333	case ::gig::dimension_effect3depth:
334	DimValues[i] = pChannel->ControllerTable[93];
335	break;
336	case ::gig::dimension_effect4depth:
337	DimValues[i] = pChannel->ControllerTable[94];
338	break;
339	case ::gig::dimension_effect5depth:
340	DimValues[i] = pChannel->ControllerTable[95];
341	break;
342	case ::gig::dimension_none:
343	std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
344	break;
345	default:
346	std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
347	}
348	}
349
350	// return if this is a release triggered voice and there is no
351	// releasetrigger dimension (could happen if an instrument
352	// change has occured between note on and off)
353	if (ReleaseTriggerVoice && !(VoiceType & Voice::type_release_trigger)) return Pool<Voice>::Iterator();
354
355	::gig::DimensionRegion* pDimRgn;
356	if (!itNote->Format.Gig.DimMask) { // normal case ...
357	pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
358	} else { // some dimension zones were overridden (i.e. by instrument script) ...
359	dmsg(3,("trigger with dim mask=%d val=%d\n", itNote->Format.Gig.DimMask, itNote->Format.Gig.DimBits));
360	int index = pRegion->GetDimensionRegionIndexByValue(DimValues);
361	index &= ~itNote->Format.Gig.DimMask;
362	index \|= itNote->Format.Gig.DimBits & itNote->Format.Gig.DimMask;
363	pDimRgn = pRegion->pDimensionRegions[index & 255];
364	}
365	if (!pDimRgn) return Pool<Voice>::Iterator(); // error (could not resolve dimension region)
366
367	// no need to continue if sample is silent
368	if (!pDimRgn->pSample \|\| !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
369
370	dmsg(2,("sample -> \"%s\"\n", pDimRgn->pSample->pInfo->Name.c_str()));
371
372	// allocate a new voice for the key
373	Pool<Voice>::Iterator itNewVoice = GetVoicePool()->allocAppend();
374
375	int res = InitNewVoice (
376	pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
377	iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
378	);
379	if (!res) return itNewVoice;
380
381	return Pool<Voice>::Iterator(); // no free voice or error
382	}
383
384	bool Engine::DiskStreamSupported() {
385	return true;
386	}
387
388	String Engine::Description() {
389	return "GigaSampler Format Engine";
390	}
391
392	String Engine::Version() {
393	String s = "$Revision$";
394	return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
395	}
396
397	}} // namespace LinuxSampler::gig