/[svn]/linuxsampler/trunk/src/engines/sf2/EngineChannel.cpp
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Contents of /linuxsampler/trunk/src/engines/sf2/EngineChannel.cpp

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Revision 2012 - (show annotations) (download)
Fri Oct 23 17:53:17 2009 UTC (14 years, 5 months ago) by iliev
File size: 6654 byte(s)
* Refactoring: moved the independent code from
  the Gigasampler format engine to base classes
* SFZ format engine: experimental code (not usable yet)
* SoundFont format engine: experimental code (not usable yet)
* Fixed crash which may occur when MIDI key + transpose is out of range

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 "EngineChannel.h"
26 #include "Engine.h"
27
28 namespace LinuxSampler { namespace sf2 {
29 EngineChannel::EngineChannel() {
30 for(int i = 0; i < 128; i++) PressedKeys[i] = false;
31 LastKey = LastKeySwitch = -1;
32 }
33
34 EngineChannel::~EngineChannel() {
35 DisconnectAudioOutputDevice();
36 // In case the channel was removed before the instrument was
37 // fully loaded, try to give back instrument again (see bug #113)
38 InstrumentChangeCmd< ::sf2::Region, ::sf2::InstrumentBase>& cmd = ChangeInstrument(NULL);
39 if (cmd.pInstrument) {
40 InstrumentResourceManager* instrs = dynamic_cast<InstrumentResourceManager*>(pEngine->GetInstrumentManager());
41 instrs->HandBack(cmd.pInstrument, this);
42 }
43 ///////
44 }
45
46 AbstractEngine::Format EngineChannel::GetEngineFormat() { return AbstractEngine::SF2; }
47
48 /** This method is not thread safe! */
49 void EngineChannel::ResetInternal() {
50 CurrentKeyDimension = 0;
51 EngineChannelBase<Voice, ::sf2::Region, ::sf2::InstrumentBase>::ResetInternal();
52 for(int i = 0; i < 128; i++) PressedKeys[i] = false;
53 }
54
55 /**
56 * Will be called by the MIDIIn Thread to signal that a program
57 * change should be performed. As a program change isn't
58 * real-time safe, the actual change is performed by the disk
59 * thread.
60 *
61 * @param Program - MIDI program change number
62 */
63 void EngineChannel::SendProgramChange(uint8_t Program) {
64 Engine* engine = dynamic_cast<Engine*>(pEngine);
65 if(engine == NULL) return;
66
67 if(engine->GetDiskThread()) {
68 engine->GetDiskThread()->OrderProgramChange(Program, this);
69 } else {
70 // TODO:
71 }
72 }
73
74 /**
75 * Load an instrument from a .sf2 file. PrepareLoadInstrument() has to
76 * be called first to provide the information which instrument to load.
77 * This method will then actually start to load the instrument and block
78 * the calling thread until loading was completed.
79 *
80 * @see PrepareLoadInstrument()
81 */
82 void EngineChannel::LoadInstrument() {
83 InstrumentResourceManager* pInstrumentManager = dynamic_cast<InstrumentResourceManager*>(pEngine->GetInstrumentManager());
84
85 // make sure we don't trigger any new notes with an old
86 // instrument
87 InstrumentChangeCmd< ::sf2::Region, ::sf2::InstrumentBase>& cmd = ChangeInstrument(0);
88 if (cmd.pInstrument) {
89 // give old instrument back to instrument manager, but
90 // keep the dimension regions and samples that are in use
91 pInstrumentManager->HandBackInstrument(cmd.pInstrument, this, cmd.pRegionsInUse);
92 }
93 cmd.pRegionsInUse->clear();
94
95 // delete all key groups
96 ActiveKeyGroups.clear();
97
98 // request sf2 instrument from instrument manager
99 ::sf2::InstrumentBase* newInstrument;
100 try {
101 InstrumentManager::instrument_id_t instrid;
102 instrid.FileName = InstrumentFile;
103 instrid.Index = InstrumentIdx;
104
105 newInstrument = pInstrumentManager->Borrow(instrid, this);
106 if (!newInstrument) {
107 throw InstrumentManagerException("resource was not created");
108 }
109 }
110 catch (InstrumentManagerException e) {
111 InstrumentStat = -3;
112 StatusChanged(true);
113 String msg = "sf2::Engine error: Failed to load instrument, cause: " + e.Message();
114 throw Exception(msg);
115 }
116 catch (::sf2::Exception e) {
117 InstrumentStat = -3;
118 StatusChanged(true);
119 String msg = "sf2::Engine error: Failed to load instrument, cause: " + e.Message;
120 throw Exception(msg);
121 }
122 catch (::std::runtime_error e) {
123 InstrumentStat = -3;
124 StatusChanged(true);
125 String msg = "sf2::Engine error: Failed to load instrument, cause: ";
126 msg += e.what();
127 throw Exception(msg);
128 }
129 catch (...) {
130 InstrumentStat = -4;
131 StatusChanged(true);
132 throw Exception("sf2::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse sf2 file.");
133 }
134
135 // rebuild ActiveKeyGroups map with key groups of current instrument
136 //for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion())
137 // if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;
138 // TODO: ^^^
139
140 InstrumentIdxName = newInstrument->GetName();
141 InstrumentStat = 100;
142
143 ChangeInstrument(newInstrument);
144
145 StatusChanged(true);
146 }
147
148 void EngineChannel::ProcessKeySwitchChange(int key) { }
149
150 }} // namespace LinuxSampler::sf2

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