engines/gig/Engine.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2009 Christian Schoenebeck                         *
 *   Copyright (C) 2009 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"

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

    /**
     *  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);
    }

    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
    ) {
        EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
        // first, get total amount of required voices (dependant on amount of layers)
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
        if (pRegion && !RegionSuspended(pRegion)) {
            int voicesRequired = pRegion->Layers;
            // now launch the required amount of voices
            for (int i = 0; i < voicesRequired; i++)
                LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
        }
    }

    void Engine::TriggerReleaseVoices (
        LinuxSampler::EngineChannel*  pEngineChannel,
        RTList<Event>::Iterator&      itNoteOffEvent
    ) {
        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)
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
        if (pRegion) {
            int voicesRequired = pRegion->Layers;

            // 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++)
                LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
        }
    }

    Pool<Voice>::Iterator Engine::LaunchVoice (
        LinuxSampler::EngineChannel*  pEngineChannel,
        Pool<Event>::Iterator&        itNoteOnEvent,
        int                           iLayer,
        bool                          ReleaseTriggerVoice,
        bool                          VoiceStealing,
        bool                          HandleKeyGroupConflicts
    ) {
        EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
        int MIDIKey = itNoteOnEvent->Param.Note.Key;
        EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
        ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);

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

        // only mark the first voice of a layered voice (group) to be in a
        // key group, so the layered voices won't kill each other
        int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;

        if (HandleKeyGroupConflicts) 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] = itNoteOnEvent->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:
                    RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
                    DimValues[i] = uint(RandomSeed / 4294967296.0f * pRegion->pDimensionDefinitions[i].zones);
                    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 = pRegion->GetDimensionRegionByValue(DimValues);

        // no need to continue if sample is silent
        if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();

        // allocate a new voice for the key
        Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->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: 1.107 $";
        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) 2005-2009 Christian Schoenebeck *
7	* Copyright (C) 2009 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
28	namespace LinuxSampler { namespace gig {
29	Engine::Format Engine::GetEngineFormat() { return GIG; }
30
31	/**
32	* Reacts on supported control change commands (e.g. pitch bend wheel,
33	* modulation wheel, aftertouch).
34	*
35	* @param pEngineChannel - engine channel on which this event occured on
36	* @param itControlChangeEvent - controller, value and time stamp of the event
37	*/
38	void Engine::ProcessControlChange (
39	LinuxSampler::EngineChannel* pEngineChannel,
40	Pool<Event>::Iterator& itControlChangeEvent
41	) {
42	dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
43
44	EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
45	// handle the "control triggered" MIDI rule: a control change
46	// event can trigger a new note on or note off event
47	if (pChannel->pInstrument) {
48
49	::gig::MidiRule* rule;
50	for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
51
52	if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
53	dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
54	if (itControlChangeEvent->Param.CC.Controller ==
55	ctrlTrigger->ControllerNumber) {
56
57	uint8_t oldCCValue = pChannel->ControllerTable[
58	itControlChangeEvent->Param.CC.Controller];
59	uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
60
61	for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
62	::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
63	&ctrlTrigger->pTriggers[i];
64
65	// check if the controller has passed the
66	// trigger point in the right direction
67	if ((pTrigger->Descending &&
68	oldCCValue > pTrigger->TriggerPoint &&
69	newCCValue <= pTrigger->TriggerPoint) \|\|
70	(!pTrigger->Descending &&
71	oldCCValue < pTrigger->TriggerPoint &&
72	newCCValue >= pTrigger->TriggerPoint)) {
73
74	RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
75	if (itNewEvent) {
76	itNewEvent = itControlChangeEvent;
77	itNewEvent->Param.Note.Key = pTrigger->Key;
78
79	if (pTrigger->NoteOff \|\| pTrigger->Velocity == 0) {
80	itNewEvent->Type = Event::type_note_off;
81	itNewEvent->Param.Note.Velocity = 100;
82
83	ProcessNoteOff(pEngineChannel, itNewEvent);
84	} else {
85	itNewEvent->Type = Event::type_note_on;
86	//TODO: if Velocity is 255, the triggered velocity should
87	// depend on how fast the controller is moving
88	itNewEvent->Param.Note.Velocity =
89	pTrigger->Velocity == 255 ? 100 :
90	pTrigger->Velocity;
91
92	ProcessNoteOn(pEngineChannel, itNewEvent);
93	}
94	}
95	else dmsg(1,("Event pool emtpy!\n"));
96	}
97	}
98	}
99	}
100	}
101	}
102
103	// update controller value in the engine channel's controller table
104	pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
105
106	ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
107
108	// handle FX send controllers
109	ProcessFxSendControllers(pChannel, itControlChangeEvent);
110	}
111
112	DiskThread* Engine::CreateDiskThread() {
113	return new DiskThread (
114	iMaxDiskStreams,
115	((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
116	&instruments
117	);
118	}
119
120	void Engine::TriggerNewVoices (
121	LinuxSampler::EngineChannel* pEngineChannel,
122	RTList<Event>::Iterator& itNoteOnEvent,
123	bool HandleKeyGroupConflicts
124	) {
125	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
126	// first, get total amount of required voices (dependant on amount of layers)
127	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
128	if (pRegion && !RegionSuspended(pRegion)) {
129	int voicesRequired = pRegion->Layers;
130	// now launch the required amount of voices
131	for (int i = 0; i < voicesRequired; i++)
132	LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
133	}
134	}
135
136	void Engine::TriggerReleaseVoices (
137	LinuxSampler::EngineChannel* pEngineChannel,
138	RTList<Event>::Iterator& itNoteOffEvent
139	) {
140	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
141	MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
142	// first, get total amount of required voices (dependant on amount of layers)
143	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
144	if (pRegion) {
145	int voicesRequired = pRegion->Layers;
146
147	// MIDI note-on velocity is used instead of note-off velocity
148	itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
149
150	// now launch the required amount of voices
151	for (int i = 0; i < voicesRequired; i++)
152	LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
153	}
154	}
155
156	Pool<Voice>::Iterator Engine::LaunchVoice (
157	LinuxSampler::EngineChannel* pEngineChannel,
158	Pool<Event>::Iterator& itNoteOnEvent,
159	int iLayer,
160	bool ReleaseTriggerVoice,
161	bool VoiceStealing,
162	bool HandleKeyGroupConflicts
163	) {
164	EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
165	int MIDIKey = itNoteOnEvent->Param.Note.Key;
166	EngineChannel::MidiKey* pKey = &pChannel->pMIDIKeyInfo[MIDIKey];
167	::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);
168
169	// if nothing defined for this key
170	if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
171
172	// only mark the first voice of a layered voice (group) to be in a
173	// key group, so the layered voices won't kill each other
174	int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
175
176	if (HandleKeyGroupConflicts) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
177
178	Voice::type_t VoiceType = Voice::type_normal;
179
180	// get current dimension values to select the right dimension region
181	//TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
182	//FIXME: controller values for selecting the dimension region here are currently not sample accurate
183	uint DimValues[8] = { 0 };
184	for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
185	switch (pRegion->pDimensionDefinitions[i].dimension) {
186	case ::gig::dimension_samplechannel:
187	DimValues[i] = 0; //TODO: we currently ignore this dimension
188	break;
189	case ::gig::dimension_layer:
190	DimValues[i] = iLayer;
191	break;
192	case ::gig::dimension_velocity:
193	DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
194	break;
195	case ::gig::dimension_channelaftertouch:
196	DimValues[i] = pChannel->ControllerTable[128];
197	break;
198	case ::gig::dimension_releasetrigger:
199	VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
200	DimValues[i] = (uint) ReleaseTriggerVoice;
201	break;
202	case ::gig::dimension_keyboard:
203	DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
204	break;
205	case ::gig::dimension_roundrobin:
206	DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
207	break;
208	case ::gig::dimension_roundrobinkeyboard:
209	DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
210	break;
211	case ::gig::dimension_random:
212	RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
213	DimValues[i] = uint(RandomSeed / 4294967296.0f * pRegion->pDimensionDefinitions[i].zones);
214	break;
215	case ::gig::dimension_modwheel:
216	DimValues[i] = pChannel->ControllerTable[1];
217	break;
218	case ::gig::dimension_breath:
219	DimValues[i] = pChannel->ControllerTable[2];
220	break;
221	case ::gig::dimension_foot:
222	DimValues[i] = pChannel->ControllerTable[4];
223	break;
224	case ::gig::dimension_portamentotime:
225	DimValues[i] = pChannel->ControllerTable[5];
226	break;
227	case ::gig::dimension_effect1:
228	DimValues[i] = pChannel->ControllerTable[12];
229	break;
230	case ::gig::dimension_effect2:
231	DimValues[i] = pChannel->ControllerTable[13];
232	break;
233	case ::gig::dimension_genpurpose1:
234	DimValues[i] = pChannel->ControllerTable[16];
235	break;
236	case ::gig::dimension_genpurpose2:
237	DimValues[i] = pChannel->ControllerTable[17];
238	break;
239	case ::gig::dimension_genpurpose3:
240	DimValues[i] = pChannel->ControllerTable[18];
241	break;
242	case ::gig::dimension_genpurpose4:
243	DimValues[i] = pChannel->ControllerTable[19];
244	break;
245	case ::gig::dimension_sustainpedal:
246	DimValues[i] = pChannel->ControllerTable[64];
247	break;
248	case ::gig::dimension_portamento:
249	DimValues[i] = pChannel->ControllerTable[65];
250	break;
251	case ::gig::dimension_sostenutopedal:
252	DimValues[i] = pChannel->ControllerTable[66];
253	break;
254	case ::gig::dimension_softpedal:
255	DimValues[i] = pChannel->ControllerTable[67];
256	break;
257	case ::gig::dimension_genpurpose5:
258	DimValues[i] = pChannel->ControllerTable[80];
259	break;
260	case ::gig::dimension_genpurpose6:
261	DimValues[i] = pChannel->ControllerTable[81];
262	break;
263	case ::gig::dimension_genpurpose7:
264	DimValues[i] = pChannel->ControllerTable[82];
265	break;
266	case ::gig::dimension_genpurpose8:
267	DimValues[i] = pChannel->ControllerTable[83];
268	break;
269	case ::gig::dimension_effect1depth:
270	DimValues[i] = pChannel->ControllerTable[91];
271	break;
272	case ::gig::dimension_effect2depth:
273	DimValues[i] = pChannel->ControllerTable[92];
274	break;
275	case ::gig::dimension_effect3depth:
276	DimValues[i] = pChannel->ControllerTable[93];
277	break;
278	case ::gig::dimension_effect4depth:
279	DimValues[i] = pChannel->ControllerTable[94];
280	break;
281	case ::gig::dimension_effect5depth:
282	DimValues[i] = pChannel->ControllerTable[95];
283	break;
284	case ::gig::dimension_none:
285	std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
286	break;
287	default:
288	std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
289	}
290	}
291
292	// return if this is a release triggered voice and there is no
293	// releasetrigger dimension (could happen if an instrument
294	// change has occured between note on and off)
295	if (ReleaseTriggerVoice && VoiceType != Voice::type_release_trigger) return Pool<Voice>::Iterator();
296
297	::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
298
299	// no need to continue if sample is silent
300	if (!pDimRgn->pSample \|\| !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
301
302	// allocate a new voice for the key
303	Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
304
305	int res = InitNewVoice (
306	pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
307	iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
308	);
309	if (!res) return itNewVoice;
310
311	return Pool<Voice>::Iterator(); // no free voice or error
312	}
313
314	bool Engine::DiskStreamSupported() {
315	return true;
316	}
317
318	String Engine::Description() {
319	return "GigaSampler Format Engine";
320	}
321
322	String Engine::Version() {
323	String s = "$Revision: 1.107 $";
324	return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
325	}
326
327	}} // namespace LinuxSampler::gig