engines/gig/EngineChannel.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
 *   Copyright (C) 2009-2011 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 "EngineChannel.h"
#include "Engine.h"

namespace LinuxSampler { namespace gig {
    EngineChannel::EngineChannel() {
        
    }

    EngineChannel::~EngineChannel() {
        DisconnectAudioOutputDevice();
        // In case the channel was removed before the instrument was
        // fully loaded, try to give back instrument again (see bug #113)
        InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(NULL);
        if (cmd.pInstrument) {
            Engine::instruments.HandBack(cmd.pInstrument, this);
        }
        ///////
    }

    AbstractEngine::Format EngineChannel::GetEngineFormat() { return AbstractEngine::GIG; }

    /** This method is not thread safe! */
    void EngineChannel::ResetInternal() {
        CurrentKeyDimension = 0;
        EngineChannelBase<Voice, ::gig::DimensionRegion, ::gig::Instrument>::ResetInternal();
    }

    /**
     *  Will be called by the MIDIIn Thread to signal that a program
     *  change should be performed. As a program change isn't
     *  real-time safe, the actual change is performed by the disk
     *  thread.
     *
     *  @param Program     - MIDI program change number
     */
    void EngineChannel::SendProgramChange(uint8_t Program) {
        SetMidiProgram(Program);
        Engine* engine = dynamic_cast<Engine*>(pEngine);
        if(engine == NULL) return;

        if(engine->GetDiskThread()) {
            uint32_t merged = (GetMidiBankMsb() << 16) | (GetMidiBankLsb() << 8) | Program;
            engine->GetDiskThread()->OrderProgramChange(merged, this);
        } else {
            // TODO: 
        }
    }

    /**
     * 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.
     *
     * @see PrepareLoadInstrument()
     */
    void EngineChannel::LoadInstrument() {
        InstrumentResourceManager* pInstrumentManager = dynamic_cast<InstrumentResourceManager*>(pEngine->GetInstrumentManager());

        // make sure we don't trigger any new notes with an old
        // instrument
        InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(0);
        if (cmd.pInstrument) {
            // give old instrument back to instrument manager, but
            // keep the dimension regions and samples that are in use
            pInstrumentManager->HandBackInstrument(cmd.pInstrument, this, cmd.pRegionsInUse);
        }
        cmd.pRegionsInUse->clear();

        // delete all key groups
        DeleteGroupEventLists();

        // request gig instrument from instrument manager
        ::gig::Instrument* newInstrument;
        try {
            InstrumentManager::instrument_id_t instrid;
            instrid.FileName  = InstrumentFile;
            instrid.Index     = InstrumentIdx;

            newInstrument = pInstrumentManager->Borrow(instrid, this);
            if (!newInstrument) {
                throw InstrumentManagerException("resource was not created");
            }
        }
        catch (RIFF::Exception e) {
            InstrumentStat = -2;
            StatusChanged(true);
            String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
            throw Exception(msg);
        }
        catch (InstrumentManagerException e) {
            InstrumentStat = -3;
            StatusChanged(true);
            String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
            throw Exception(msg);
        }
        catch (...) {
            InstrumentStat = -4;
            StatusChanged(true);
            throw Exception("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
        }

        RoundRobinIndex = 0;
        for (int i = 0 ; i < 128 ; i++) pMIDIKeyInfo[i].pRoundRobinIndex = NULL;

        // rebuild ActiveKeyGroups map with key groups of current
        // instrument and set the round robin pointers to use one
        // counter for each region
        int region = 0;
        for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion()) {
            AddGroup(pRegion->KeyGroup);

            RoundRobinIndexes[region] = 0;
            for (int iKey = pRegion->KeyRange.low; iKey <= pRegion->KeyRange.high; iKey++) {
                pMIDIKeyInfo[iKey].pRoundRobinIndex = &RoundRobinIndexes[region];
            }
            region++;
        }

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

        ChangeInstrument(newInstrument);

        StatusChanged(true);
    }

    void EngineChannel::ProcessKeySwitchChange(int key) {
        // Change key dimension value if key is in keyswitching area
        {
            if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
                CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
                    (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
        }
    }

}} // 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) 2009-2011 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 "EngineChannel.h"
26	#include "Engine.h"
27
28	namespace LinuxSampler { namespace gig {
29	EngineChannel::EngineChannel() {
30
31	}
32
33	EngineChannel::~EngineChannel() {
34	DisconnectAudioOutputDevice();
35	// In case the channel was removed before the instrument was
36	// fully loaded, try to give back instrument again (see bug #113)
37	InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(NULL);
38	if (cmd.pInstrument) {
39	Engine::instruments.HandBack(cmd.pInstrument, this);
40	}
41	///////
42	}
43
44	AbstractEngine::Format EngineChannel::GetEngineFormat() { return AbstractEngine::GIG; }
45
46	/** This method is not thread safe! */
47	void EngineChannel::ResetInternal() {
48	CurrentKeyDimension = 0;
49	EngineChannelBase<Voice, ::gig::DimensionRegion, ::gig::Instrument>::ResetInternal();
50	}
51
52	/**
53	* Will be called by the MIDIIn Thread to signal that a program
54	* change should be performed. As a program change isn't
55	* real-time safe, the actual change is performed by the disk
56	* thread.
57	*
58	* @param Program - MIDI program change number
59	*/
60	void EngineChannel::SendProgramChange(uint8_t Program) {
61	SetMidiProgram(Program);
62	Engine* engine = dynamic_cast<Engine*>(pEngine);
63	if(engine == NULL) return;
64
65	if(engine->GetDiskThread()) {
66	uint32_t merged = (GetMidiBankMsb() << 16) \| (GetMidiBankLsb() << 8) \| Program;
67	engine->GetDiskThread()->OrderProgramChange(merged, this);
68	} else {
69	// TODO:
70	}
71	}
72
73	/**
74	* Load an instrument from a .gig file. PrepareLoadInstrument() has to
75	* be called first to provide the information which instrument to load.
76	* This method will then actually start to load the instrument and block
77	* the calling thread until loading was completed.
78	*
79	* @see PrepareLoadInstrument()
80	*/
81	void EngineChannel::LoadInstrument() {
82	InstrumentResourceManager* pInstrumentManager = dynamic_cast<InstrumentResourceManager*>(pEngine->GetInstrumentManager());
83
84	// make sure we don't trigger any new notes with an old
85	// instrument
86	InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(0);
87	if (cmd.pInstrument) {
88	// give old instrument back to instrument manager, but
89	// keep the dimension regions and samples that are in use
90	pInstrumentManager->HandBackInstrument(cmd.pInstrument, this, cmd.pRegionsInUse);
91	}
92	cmd.pRegionsInUse->clear();
93
94	// delete all key groups
95	DeleteGroupEventLists();
96
97	// request gig instrument from instrument manager
98	::gig::Instrument* newInstrument;
99	try {
100	InstrumentManager::instrument_id_t instrid;
101	instrid.FileName = InstrumentFile;
102	instrid.Index = InstrumentIdx;
103
104	newInstrument = pInstrumentManager->Borrow(instrid, this);
105	if (!newInstrument) {
106	throw InstrumentManagerException("resource was not created");
107	}
108	}
109	catch (RIFF::Exception e) {
110	InstrumentStat = -2;
111	StatusChanged(true);
112	String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
113	throw Exception(msg);
114	}
115	catch (InstrumentManagerException e) {
116	InstrumentStat = -3;
117	StatusChanged(true);
118	String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
119	throw Exception(msg);
120	}
121	catch (...) {
122	InstrumentStat = -4;
123	StatusChanged(true);
124	throw Exception("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
125	}
126
127	RoundRobinIndex = 0;
128	for (int i = 0 ; i < 128 ; i++) pMIDIKeyInfo[i].pRoundRobinIndex = NULL;
129
130	// rebuild ActiveKeyGroups map with key groups of current
131	// instrument and set the round robin pointers to use one
132	// counter for each region
133	int region = 0;
134	for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion()) {
135	AddGroup(pRegion->KeyGroup);
136
137	RoundRobinIndexes[region] = 0;
138	for (int iKey = pRegion->KeyRange.low; iKey <= pRegion->KeyRange.high; iKey++) {
139	pMIDIKeyInfo[iKey].pRoundRobinIndex = &RoundRobinIndexes[region];
140	}
141	region++;
142	}
143
144	InstrumentIdxName = newInstrument->pInfo->Name;
145	InstrumentStat = 100;
146
147	ChangeInstrument(newInstrument);
148
149	StatusChanged(true);
150	}
151
152	void EngineChannel::ProcessKeySwitchChange(int key) {
153	// Change key dimension value if key is in keyswitching area
154	{
155	if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
156	CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
157	(pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
158	}
159	}
160
161	}} // namespace LinuxSampler::gig