engines/gig/EngineChannel.cpp

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

namespace LinuxSampler { namespace gig {

    EngineChannel::EngineChannel() {
        pMIDIKeyInfo = new midi_key_info_t[128];
        pEngine      = NULL;
        pInstrument  = NULL;
        pEventQueue  = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
        pActiveKeys  = new Pool<uint>(128);
        for (uint i = 0; i < 128; i++) {
            pMIDIKeyInfo[i].pActiveVoices  = NULL; // we allocate when we retrieve the right Engine object
            pMIDIKeyInfo[i].KeyPressed     = false;
            pMIDIKeyInfo[i].Active         = false;
            pMIDIKeyInfo[i].ReleaseTrigger = false;
            pMIDIKeyInfo[i].pEvents        = NULL; // we allocate when we retrieve the right Engine object
            pMIDIKeyInfo[i].RoundRobinIndex = 0;
        }
        InstrumentIdx  = -1;
        InstrumentStat = -1;
        AudioDeviceChannelLeft  = -1;
        AudioDeviceChannelRight = -1;
    }

    EngineChannel::~EngineChannel() {
        if (pInstrument) Engine::instruments.HandBack(pInstrument, this);
        for (uint i = 0; i < 128; i++) {
            if (pMIDIKeyInfo[i].pActiveVoices) {
                pMIDIKeyInfo[i].pActiveVoices->clear();
                delete pMIDIKeyInfo[i].pActiveVoices;
            }
            if (pMIDIKeyInfo[i].pEvents) {
                pMIDIKeyInfo[i].pEvents->clear();
                delete pMIDIKeyInfo[i].pEvents;
            }
        }
        if (pEventQueue) delete pEventQueue;
        if (pActiveKeys) delete pActiveKeys;
        if (pMIDIKeyInfo) delete[] pMIDIKeyInfo;
    }

    /**
     * This method is not thread safe!
     */
    void EngineChannel::ResetInternal() {
        Pitch               = 0;
        SustainPedal        = false;
        GlobalVolume        = 1.0;
        GlobalPanLeft       = 1.0f;
        GlobalPanRight      = 1.0f;
        CurrentKeyDimension = 0;

        // set all MIDI controller values to zero
        memset(ControllerTable, 0x00, 128);

        // reset voice stealing parameters
        itLastStolenVoice = RTList<Voice>::Iterator();
        iuiLastStolenKey  = RTList<uint>::Iterator();

        // reset key info
        for (uint i = 0; i < 128; i++) {
            if (pMIDIKeyInfo[i].pActiveVoices)
                pMIDIKeyInfo[i].pActiveVoices->clear();
            if (pMIDIKeyInfo[i].pEvents)
                pMIDIKeyInfo[i].pEvents->clear();
            pMIDIKeyInfo[i].KeyPressed     = false;
            pMIDIKeyInfo[i].Active         = false;
            pMIDIKeyInfo[i].ReleaseTrigger = false;
            pMIDIKeyInfo[i].itSelf         = Pool<uint>::Iterator();
        }

        // reset all key groups
        std::map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();
        for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;

        // free all active keys
        pActiveKeys->clear();

        // delete all input events
        pEventQueue->init();

        if (pEngine) pEngine->ResetInternal();
    }

    LinuxSampler::Engine* EngineChannel::GetEngine() {
        return pEngine;
    }

    /**
     * More or less a workaround to set the instrument name, index and load
     * status variable to zero percent immediately, that is without blocking
     * the calling thread. It might be used in future for other preparations
     * as well though.
     *
     * @param FileName   - file name of the Gigasampler instrument file
     * @param Instrument - index of the instrument in the .gig file
     * @see LoadInstrument()
     */
    void EngineChannel::PrepareLoadInstrument(const char* FileName, uint Instrument) {
        InstrumentFile = FileName;
        InstrumentIdx  = Instrument;
        InstrumentStat = 0;
    }

    /**
     * Load an instrument from a .gig file. PrepareLoadInstrument() has to
     * be called first to provide the information which instrument to load.
     * This method will then actually start to load the instrument and block
     * the calling thread until loading was completed.
     *
     * @returns detailed description of the method call result
     * @see PrepareLoadInstrument()
     */
    void EngineChannel::LoadInstrument() {

        if (pEngine) pEngine->DisableAndLock();

        ResetInternal();

        // free old instrument
        if (pInstrument) {
            // give old instrument back to instrument manager
            Engine::instruments.HandBack(pInstrument, this);
        }

        // delete all key groups
        ActiveKeyGroups.clear();

        // request gig instrument from instrument manager
        try {
            instrument_id_t instrid;
            instrid.FileName    = InstrumentFile;
            instrid.iInstrument = InstrumentIdx;
            pInstrument = Engine::instruments.Borrow(instrid, this);
            if (!pInstrument) {
                InstrumentStat = -1;
                dmsg(1,("no instrument loaded!!!\n"));
                exit(EXIT_FAILURE);
            }
        }
        catch (RIFF::Exception e) {
            InstrumentStat = -2;
            String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
            throw LinuxSamplerException(msg);
        }
        catch (InstrumentResourceManagerException e) {
            InstrumentStat = -3;
            String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
            throw LinuxSamplerException(msg);
        }
        catch (...) {
            InstrumentStat = -4;
            throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
        }

        // rebuild ActiveKeyGroups map with key groups of current instrument
        for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion())
            if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;

        InstrumentIdxName = pInstrument->pInfo->Name;
        InstrumentStat = 100;

        // inform audio driver for the need of two channels
        try {
            if (pEngine && pEngine->pAudioOutputDevice)
                pEngine->pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo
        }
        catch (AudioOutputException e) {
            String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
            throw LinuxSamplerException(msg);
        }

        if (pEngine) pEngine->Enable();
    }

    /**
     * Will be called by the InstrumentResourceManager when the instrument
     * we are currently using in this engine is going to be updated, so we
     * can stop playback before that happens.
     */
    void EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {
        dmsg(3,("gig::Engine: Received instrument update message.\n"));
        if (pEngine) pEngine->DisableAndLock();
        ResetInternal();
        this->pInstrument = NULL;
    }

    /**
     * Will be called by the InstrumentResourceManager when the instrument
     * update process was completed, so we can continue with playback.
     */
    void EngineChannel::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
        this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())
        if (pEngine) pEngine->Enable();
    }

    void EngineChannel::Connect(AudioOutputDevice* pAudioOut) {
        if (pEngine && pEngine->pAudioOutputDevice != pAudioOut) {
            DisconnectAudioOutputDevice();
        }
        pEngine = Engine::AcquireEngine(this, pAudioOut);
        ResetInternal();
        for (uint i = 0; i < 128; i++) {
            pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pEngine->pVoicePool);
            pMIDIKeyInfo[i].pEvents       = new RTList<Event>(pEngine->pEventPool);
        }
        AudioDeviceChannelLeft  = 0;
        AudioDeviceChannelRight = 1;
        pOutputLeft             = pAudioOut->Channel(0)->Buffer();
        pOutputRight            = pAudioOut->Channel(1)->Buffer();
    }

    void EngineChannel::DisconnectAudioOutputDevice() {
        if (pEngine) { // if clause to prevent disconnect loops
            ResetInternal();
            for (uint i = 0; i < 128; i++) {
                if (pMIDIKeyInfo[i].pActiveVoices) {
                    delete pMIDIKeyInfo[i].pActiveVoices;
                    pMIDIKeyInfo[i].pActiveVoices = NULL;
                }
                if (pMIDIKeyInfo[i].pEvents) {
                    delete pMIDIKeyInfo[i].pEvents;
                    pMIDIKeyInfo[i].pEvents = NULL;
                }
            }
            Engine* oldEngine = pEngine;
            AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice;
            pEngine = NULL;
            Engine::FreeEngine(this, oldAudioDevice);
            AudioDeviceChannelLeft  = -1;
            AudioDeviceChannelRight = -1;
        }
    }

    void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {
        if (!pEngine || !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet.");

        AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel);
        if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));
        switch (EngineAudioChannel) {
            case 0: // left output channel
                pOutputLeft = pChannel->Buffer();
                AudioDeviceChannelLeft = AudioDeviceChannel;
                break;
            case 1: // right output channel
                pOutputRight = pChannel->Buffer();
                AudioDeviceChannelRight = AudioDeviceChannel;
                break;
            default:
                throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
        }
    }

    int EngineChannel::OutputChannel(uint EngineAudioChannel) {
        switch (EngineAudioChannel) {
            case 0: // left channel
                return AudioDeviceChannelLeft;
            case 1: // right channel
                return AudioDeviceChannelRight;
            default:
                throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
        }
    }

    /**
     *  Will be called by the MIDIIn Thread to let the audio thread trigger a new
     *  voice for the given key.
     *
     *  @param Key      - MIDI key number of the triggered key
     *  @param Velocity - MIDI velocity value of the triggered key
     */
    void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) {
        if (pEngine) {
            Event event               = pEngine->pEventGenerator->CreateEvent();
            event.Type                = Event::type_note_on;
            event.Param.Note.Key      = Key;
            event.Param.Note.Velocity = Velocity;
            event.pEngineChannel      = this;
            if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
            else dmsg(1,("EngineChannel: Input event queue full!"));
        }
    }

    /**
     *  Will be called by the MIDIIn Thread to signal the audio thread to release
     *  voice(s) on the given key.
     *
     *  @param Key      - MIDI key number of the released key
     *  @param Velocity - MIDI release velocity value of the released key
     */
    void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) {
        if (pEngine) {
            Event event               = pEngine->pEventGenerator->CreateEvent();
            event.Type                = Event::type_note_off;
            event.Param.Note.Key      = Key;
            event.Param.Note.Velocity = Velocity;
            event.pEngineChannel      = this;
            if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
            else dmsg(1,("EngineChannel: Input event queue full!"));
        }
    }

    /**
     *  Will be called by the MIDIIn Thread to signal the audio thread to change
     *  the pitch value for all voices.
     *
     *  @param Pitch - MIDI pitch value (-8192 ... +8191)
     */
    void EngineChannel::SendPitchbend(int Pitch) {
        if (pEngine) {
            Event event             = pEngine->pEventGenerator->CreateEvent();
            event.Type              = Event::type_pitchbend;
            event.Param.Pitch.Pitch = Pitch;
            event.pEngineChannel    = this;
            if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
            else dmsg(1,("EngineChannel: Input event queue full!"));
        }
    }

    /**
     *  Will be called by the MIDIIn Thread to signal the audio thread that a
     *  continuous controller value has changed.
     *
     *  @param Controller - MIDI controller number of the occured control change
     *  @param Value      - value of the control change
     */
    void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) {
        if (pEngine) {
            Event event               = pEngine->pEventGenerator->CreateEvent();
            event.Type                = Event::type_control_change;
            event.Param.CC.Controller = Controller;
            event.Param.CC.Value      = Value;
            event.pEngineChannel      = this;
            if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
            else dmsg(1,("EngineChannel: Input event queue full!"));
        }
    }

    float EngineChannel::Volume() {
        return GlobalVolume;
    }

    void EngineChannel::Volume(float f) {
        GlobalVolume = f;
    }

    uint EngineChannel::Channels() {
        return 2;
    }

    String EngineChannel::InstrumentFileName() {
        return InstrumentFile;
    }

    String EngineChannel::InstrumentName() {
        return InstrumentIdxName;
    }

    int EngineChannel::InstrumentIndex() {
        return InstrumentIdx;
    }

    int EngineChannel::InstrumentStatus() {
        return InstrumentStat;
    }

}} // namespace LinuxSampler::gig
1	schoenebeck	411	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6			* Copyright (C) 2005 Christian Schoenebeck *
7			* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "EngineChannel.h"
25
26	persson	438	namespace LinuxSampler { namespace gig {
27	schoenebeck	411
28			EngineChannel::EngineChannel() {
29			pMIDIKeyInfo = new midi_key_info_t[128];
30			pEngine = NULL;
31			pInstrument = NULL;
32	persson	438	pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
33	schoenebeck	411	pActiveKeys = new Pool<uint>(128);
34			for (uint i = 0; i < 128; i++) {
35			pMIDIKeyInfo[i].pActiveVoices = NULL; // we allocate when we retrieve the right Engine object
36			pMIDIKeyInfo[i].KeyPressed = false;
37			pMIDIKeyInfo[i].Active = false;
38			pMIDIKeyInfo[i].ReleaseTrigger = false;
39			pMIDIKeyInfo[i].pEvents = NULL; // we allocate when we retrieve the right Engine object
40	persson	438	pMIDIKeyInfo[i].RoundRobinIndex = 0;
41	schoenebeck	411	}
42			InstrumentIdx = -1;
43			InstrumentStat = -1;
44			AudioDeviceChannelLeft = -1;
45			AudioDeviceChannelRight = -1;
46			}
47
48			EngineChannel::~EngineChannel() {
49			if (pInstrument) Engine::instruments.HandBack(pInstrument, this);
50			for (uint i = 0; i < 128; i++) {
51			if (pMIDIKeyInfo[i].pActiveVoices) {
52			pMIDIKeyInfo[i].pActiveVoices->clear();
53			delete pMIDIKeyInfo[i].pActiveVoices;
54			}
55			if (pMIDIKeyInfo[i].pEvents) {
56			pMIDIKeyInfo[i].pEvents->clear();
57			delete pMIDIKeyInfo[i].pEvents;
58			}
59			}
60			if (pEventQueue) delete pEventQueue;
61			if (pActiveKeys) delete pActiveKeys;
62			if (pMIDIKeyInfo) delete[] pMIDIKeyInfo;
63			}
64
65			/**
66			* This method is not thread safe!
67			*/
68			void EngineChannel::ResetInternal() {
69			Pitch = 0;
70			SustainPedal = false;
71			GlobalVolume = 1.0;
72	schoenebeck	424	GlobalPanLeft = 1.0f;
73			GlobalPanRight = 1.0f;
74	schoenebeck	411	CurrentKeyDimension = 0;
75
76			// set all MIDI controller values to zero
77			memset(ControllerTable, 0x00, 128);
78
79	schoenebeck	412	// reset voice stealing parameters
80			itLastStolenVoice = RTList<Voice>::Iterator();
81			iuiLastStolenKey = RTList<uint>::Iterator();
82
83	schoenebeck	411	// reset key info
84			for (uint i = 0; i < 128; i++) {
85			if (pMIDIKeyInfo[i].pActiveVoices)
86			pMIDIKeyInfo[i].pActiveVoices->clear();
87			if (pMIDIKeyInfo[i].pEvents)
88			pMIDIKeyInfo[i].pEvents->clear();
89			pMIDIKeyInfo[i].KeyPressed = false;
90			pMIDIKeyInfo[i].Active = false;
91			pMIDIKeyInfo[i].ReleaseTrigger = false;
92			pMIDIKeyInfo[i].itSelf = Pool<uint>::Iterator();
93			}
94
95			// reset all key groups
96			std::map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();
97			for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;
98
99			// free all active keys
100			pActiveKeys->clear();
101
102			// delete all input events
103			pEventQueue->init();
104
105			if (pEngine) pEngine->ResetInternal();
106			}
107
108			LinuxSampler::Engine* EngineChannel::GetEngine() {
109			return pEngine;
110			}
111
112			/**
113			* More or less a workaround to set the instrument name, index and load
114			* status variable to zero percent immediately, that is without blocking
115			* the calling thread. It might be used in future for other preparations
116			* as well though.
117			*
118			* @param FileName - file name of the Gigasampler instrument file
119			* @param Instrument - index of the instrument in the .gig file
120			* @see LoadInstrument()
121			*/
122			void EngineChannel::PrepareLoadInstrument(const char* FileName, uint Instrument) {
123			InstrumentFile = FileName;
124			InstrumentIdx = Instrument;
125			InstrumentStat = 0;
126			}
127
128			/**
129			* Load an instrument from a .gig file. PrepareLoadInstrument() has to
130			* be called first to provide the information which instrument to load.
131			* This method will then actually start to load the instrument and block
132			* the calling thread until loading was completed.
133			*
134			* @returns detailed description of the method call result
135			* @see PrepareLoadInstrument()
136			*/
137			void EngineChannel::LoadInstrument() {
138
139			if (pEngine) pEngine->DisableAndLock();
140	persson	438
141	schoenebeck	411	ResetInternal();
142	persson	438
143	schoenebeck	411	// free old instrument
144			if (pInstrument) {
145			// give old instrument back to instrument manager
146			Engine::instruments.HandBack(pInstrument, this);
147			}
148
149			// delete all key groups
150			ActiveKeyGroups.clear();
151
152			// request gig instrument from instrument manager
153			try {
154			instrument_id_t instrid;
155			instrid.FileName = InstrumentFile;
156			instrid.iInstrument = InstrumentIdx;
157			pInstrument = Engine::instruments.Borrow(instrid, this);
158			if (!pInstrument) {
159			InstrumentStat = -1;
160			dmsg(1,("no instrument loaded!!!\n"));
161			exit(EXIT_FAILURE);
162			}
163			}
164			catch (RIFF::Exception e) {
165			InstrumentStat = -2;
166			String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
167			throw LinuxSamplerException(msg);
168			}
169			catch (InstrumentResourceManagerException e) {
170			InstrumentStat = -3;
171			String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
172			throw LinuxSamplerException(msg);
173			}
174			catch (...) {
175			InstrumentStat = -4;
176			throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
177			}
178
179			// rebuild ActiveKeyGroups map with key groups of current instrument
180			for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion())
181			if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;
182
183			InstrumentIdxName = pInstrument->pInfo->Name;
184			InstrumentStat = 100;
185
186			// inform audio driver for the need of two channels
187			try {
188			if (pEngine && pEngine->pAudioOutputDevice)
189			pEngine->pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo
190			}
191			catch (AudioOutputException e) {
192			String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
193			throw LinuxSamplerException(msg);
194			}
195
196			if (pEngine) pEngine->Enable();
197			}
198
199			/**
200			* Will be called by the InstrumentResourceManager when the instrument
201			* we are currently using in this engine is going to be updated, so we
202			* can stop playback before that happens.
203			*/
204			void EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {
205			dmsg(3,("gig::Engine: Received instrument update message.\n"));
206			if (pEngine) pEngine->DisableAndLock();
207			ResetInternal();
208			this->pInstrument = NULL;
209			}
210
211			/**
212			* Will be called by the InstrumentResourceManager when the instrument
213			* update process was completed, so we can continue with playback.
214			*/
215			void EngineChannel::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
216			this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())
217			if (pEngine) pEngine->Enable();
218			}
219
220	schoenebeck	412	void EngineChannel::Connect(AudioOutputDevice* pAudioOut) {
221			if (pEngine && pEngine->pAudioOutputDevice != pAudioOut) {
222			DisconnectAudioOutputDevice();
223			}
224	schoenebeck	411	pEngine = Engine::AcquireEngine(this, pAudioOut);
225	persson	438	ResetInternal();
226	schoenebeck	411	for (uint i = 0; i < 128; i++) {
227			pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pEngine->pVoicePool);
228			pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEngine->pEventPool);
229			}
230			AudioDeviceChannelLeft = 0;
231			AudioDeviceChannelRight = 1;
232			pOutputLeft = pAudioOut->Channel(0)->Buffer();
233			pOutputRight = pAudioOut->Channel(1)->Buffer();
234			}
235
236			void EngineChannel::DisconnectAudioOutputDevice() {
237			if (pEngine) { // if clause to prevent disconnect loops
238			ResetInternal();
239			for (uint i = 0; i < 128; i++) {
240	schoenebeck	420	if (pMIDIKeyInfo[i].pActiveVoices) {
241			delete pMIDIKeyInfo[i].pActiveVoices;
242			pMIDIKeyInfo[i].pActiveVoices = NULL;
243			}
244			if (pMIDIKeyInfo[i].pEvents) {
245			delete pMIDIKeyInfo[i].pEvents;
246			pMIDIKeyInfo[i].pEvents = NULL;
247			}
248	schoenebeck	411	}
249			Engine* oldEngine = pEngine;
250			AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice;
251			pEngine = NULL;
252			Engine::FreeEngine(this, oldAudioDevice);
253			AudioDeviceChannelLeft = -1;
254	persson	438	AudioDeviceChannelRight = -1;
255	schoenebeck	411	}
256			}
257
258			void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {
259			if (!pEngine \|\| !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet.");
260	persson	438
261	schoenebeck	411	AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel);
262			if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));
263			switch (EngineAudioChannel) {
264			case 0: // left output channel
265			pOutputLeft = pChannel->Buffer();
266			AudioDeviceChannelLeft = AudioDeviceChannel;
267			break;
268			case 1: // right output channel
269			pOutputRight = pChannel->Buffer();
270			AudioDeviceChannelRight = AudioDeviceChannel;
271			break;
272			default:
273			throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
274			}
275			}
276
277			int EngineChannel::OutputChannel(uint EngineAudioChannel) {
278			switch (EngineAudioChannel) {
279			case 0: // left channel
280			return AudioDeviceChannelLeft;
281			case 1: // right channel
282			return AudioDeviceChannelRight;
283			default:
284			throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
285			}
286			}
287
288			/**
289			* Will be called by the MIDIIn Thread to let the audio thread trigger a new
290			* voice for the given key.
291			*
292			* @param Key - MIDI key number of the triggered key
293			* @param Velocity - MIDI velocity value of the triggered key
294			*/
295			void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) {
296			if (pEngine) {
297			Event event = pEngine->pEventGenerator->CreateEvent();
298			event.Type = Event::type_note_on;
299			event.Param.Note.Key = Key;
300			event.Param.Note.Velocity = Velocity;
301	persson	438	event.pEngineChannel = this;
302	schoenebeck	411	if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
303	schoenebeck	412	else dmsg(1,("EngineChannel: Input event queue full!"));
304	schoenebeck	411	}
305			}
306
307			/**
308			* Will be called by the MIDIIn Thread to signal the audio thread to release
309			* voice(s) on the given key.
310			*
311			* @param Key - MIDI key number of the released key
312			* @param Velocity - MIDI release velocity value of the released key
313			*/
314			void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) {
315			if (pEngine) {
316			Event event = pEngine->pEventGenerator->CreateEvent();
317			event.Type = Event::type_note_off;
318			event.Param.Note.Key = Key;
319			event.Param.Note.Velocity = Velocity;
320	schoenebeck	412	event.pEngineChannel = this;
321	schoenebeck	411	if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
322	schoenebeck	412	else dmsg(1,("EngineChannel: Input event queue full!"));
323	schoenebeck	411	}
324			}
325
326			/**
327			* Will be called by the MIDIIn Thread to signal the audio thread to change
328			* the pitch value for all voices.
329			*
330			* @param Pitch - MIDI pitch value (-8192 ... +8191)
331			*/
332			void EngineChannel::SendPitchbend(int Pitch) {
333	persson	438	if (pEngine) {
334	schoenebeck	411	Event event = pEngine->pEventGenerator->CreateEvent();
335			event.Type = Event::type_pitchbend;
336			event.Param.Pitch.Pitch = Pitch;
337	schoenebeck	412	event.pEngineChannel = this;
338	schoenebeck	411	if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
339	schoenebeck	412	else dmsg(1,("EngineChannel: Input event queue full!"));
340	schoenebeck	411	}
341			}
342
343			/**
344			* Will be called by the MIDIIn Thread to signal the audio thread that a
345			* continuous controller value has changed.
346			*
347			* @param Controller - MIDI controller number of the occured control change
348			* @param Value - value of the control change
349			*/
350			void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) {
351			if (pEngine) {
352			Event event = pEngine->pEventGenerator->CreateEvent();
353			event.Type = Event::type_control_change;
354			event.Param.CC.Controller = Controller;
355			event.Param.CC.Value = Value;
356	schoenebeck	412	event.pEngineChannel = this;
357	schoenebeck	411	if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
358	schoenebeck	412	else dmsg(1,("EngineChannel: Input event queue full!"));
359	schoenebeck	411	}
360			}
361
362			float EngineChannel::Volume() {
363			return GlobalVolume;
364			}
365
366			void EngineChannel::Volume(float f) {
367			GlobalVolume = f;
368			}
369
370			uint EngineChannel::Channels() {
371			return 2;
372			}
373
374			String EngineChannel::InstrumentFileName() {
375			return InstrumentFile;
376			}
377
378			String EngineChannel::InstrumentName() {
379			return InstrumentIdxName;
380			}
381
382			int EngineChannel::InstrumentIndex() {
383			return InstrumentIdx;
384			}
385
386			int EngineChannel::InstrumentStatus() {
387			return InstrumentStat;
388	persson	438	}
389	schoenebeck	411
390			}} // namespace LinuxSampler::gig