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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 A waveform viewer and audio annotation editor.
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5 Chris Cannam, Queen Mary University of London, 2005-2006
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6
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7 This is experimental software. Not for distribution.
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8 */
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9
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10 /*
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11 This is a modified version of a source file from the
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12 Rosegarden MIDI and audio sequencer and notation editor.
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13 This file copyright 2000-2006 Chris Cannam.
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14 */
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15
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16 #ifndef _DSSIPLUGININSTANCE_H_
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17 #define _DSSIPLUGININSTANCE_H_
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18
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19 #define DSSI_API_LEVEL 2
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20
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21 #include <vector>
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22 #include <set>
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23 #include <map>
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24 #include <QString>
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25 #include <QMutex>
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26 #include <QThread>
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27
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28 #include "api/dssi.h"
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29
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30 #include "base/RingBuffer.h"
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31 #include "RealTimePluginInstance.h"
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32 #include "base/Scavenger.h"
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33
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34 class DSSIPluginInstance : public RealTimePluginInstance
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35 {
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36 public:
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37 virtual ~DSSIPluginInstance();
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38
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39 virtual bool isOK() const { return m_instanceHandle != 0; }
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40
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41 int getClientId() const { return m_client; }
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42 virtual QString getIdentifier() const { return m_identifier; }
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43 int getPosition() const { return m_position; }
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44
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45 virtual std::string getName() const;
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46 virtual std::string getDescription() const;
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47 virtual std::string getMaker() const;
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48 virtual int getPluginVersion() const;
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49 virtual std::string getCopyright() const;
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50
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51 virtual void run(const RealTime &);
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52
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53 virtual unsigned int getParameterCount() const;
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54 virtual void setParameterValue(unsigned int parameter, float value);
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55 virtual float getParameterValue(unsigned int parameter) const;
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56 virtual float getParameterDefault(unsigned int parameter) const;
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57
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58 virtual ParameterList getParameterDescriptors() const;
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59 virtual float getParameter(std::string) const;
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60 virtual void setParameter(std::string, float);
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61
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62 virtual std::string configure(std::string key, std::string value);
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63 virtual void sendEvent(const RealTime &eventTime,
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64 const void *event);
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65 virtual void clearEvents();
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66
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67 virtual size_t getBufferSize() const { return m_blockSize; }
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68 virtual size_t getAudioInputCount() const { return m_audioPortsIn.size(); }
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69 virtual size_t getAudioOutputCount() const { return m_idealChannelCount; }
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70 virtual sample_t **getAudioInputBuffers() { return m_inputBuffers; }
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71 virtual sample_t **getAudioOutputBuffers() { return m_outputBuffers; }
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72
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73 virtual ProgramList getPrograms() const;
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74 virtual std::string getCurrentProgram() const;
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75 virtual std::string getProgram(int bank, int program) const;
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76 virtual unsigned long getProgram(std::string name) const;
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77 virtual void selectProgram(std::string program);
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78
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79 virtual bool isBypassed() const { return m_bypassed; }
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80 virtual void setBypassed(bool bypassed) { m_bypassed = bypassed; }
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81
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82 virtual size_t getLatency();
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83
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84 virtual void silence();
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85 virtual void discardEvents();
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86 virtual void setIdealChannelCount(size_t channels); // may re-instantiate
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87
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88 virtual bool isInGroup() const { return m_grouped; }
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89 virtual void detachFromGroup();
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90
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91 protected:
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92 // To be constructed only by DSSIPluginFactory
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93 friend class DSSIPluginFactory;
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94
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95 // Constructor that creates the buffers internally
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96 //
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97 DSSIPluginInstance(RealTimePluginFactory *factory,
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98 int client,
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99 QString identifier,
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100 int position,
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101 unsigned long sampleRate,
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102 size_t blockSize,
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103 int idealChannelCount,
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104 const DSSI_Descriptor* descriptor);
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105
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106 void init();
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107 void instantiate(unsigned long sampleRate);
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108 void cleanup();
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109 void activate();
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110 void deactivate();
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111 void connectPorts();
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112
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113 bool handleController(snd_seq_event_t *ev);
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114 void setPortValueFromController(unsigned int portNumber, int controlValue);
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115 void selectProgramAux(std::string program, bool backupPortValues);
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116 void checkProgramCache() const;
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117
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118 void initialiseGroupMembership();
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119 void runGrouped(const RealTime &);
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120
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121 // For use in DSSIPluginFactory (set in the DSSI_Host_Descriptor):
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122 static int requestMidiSend(LADSPA_Handle instance,
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123 unsigned char ports,
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124 unsigned char channels);
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125 static void midiSend(LADSPA_Handle instance,
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126 snd_seq_event_t *events,
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127 unsigned long eventCount);
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128 static int requestNonRTThread(LADSPA_Handle instance,
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129 void (*runFunction)(LADSPA_Handle));
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130
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131 int m_client;
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132 int m_position;
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133 LADSPA_Handle m_instanceHandle;
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134 const DSSI_Descriptor *m_descriptor;
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135
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136 std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsIn;
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137 std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsOut;
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138
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139 std::vector<LADSPA_Data> m_backupControlPortsIn;
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140
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141 std::map<int, int> m_controllerMap;
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142
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143 std::vector<int> m_audioPortsIn;
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144 std::vector<int> m_audioPortsOut;
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145
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146 struct ProgramControl {
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147 int msb;
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148 int lsb;
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149 int program;
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150 };
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151 ProgramControl m_pending;
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152
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153 struct ProgramDescriptor {
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154 int bank;
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155 int program;
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156 std::string name;
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157 };
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158 mutable std::vector<ProgramDescriptor> m_cachedPrograms;
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159 mutable bool m_programCacheValid;
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160
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161 RingBuffer<snd_seq_event_t> m_eventBuffer;
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162
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163 size_t m_blockSize;
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164 sample_t **m_inputBuffers;
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165 sample_t **m_outputBuffers;
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166 bool m_ownBuffers;
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167 size_t m_idealChannelCount;
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168 size_t m_outputBufferCount;
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169 size_t m_sampleRate;
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170 float *m_latencyPort;
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171 bool m_run;
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172
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173 bool m_bypassed;
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174 std::string m_program;
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175 bool m_grouped;
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176 RealTime m_lastRunTime;
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177
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178 RealTime m_lastEventSendTime;
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179 bool m_haveLastEventSendTime;
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180
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181 QMutex m_processLock;
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182
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183 typedef std::set<DSSIPluginInstance *> PluginSet;
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184 typedef std::map<QString, PluginSet> GroupMap;
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185 static GroupMap m_groupMap;
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186 static snd_seq_event_t **m_groupLocalEventBuffers;
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187 static size_t m_groupLocalEventBufferCount;
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188
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189 static Scavenger<ScavengerArrayWrapper<snd_seq_event_t *> > m_bufferScavenger;
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190
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191 class NonRTPluginThread : public QThread
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192 {
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193 public:
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194 NonRTPluginThread(LADSPA_Handle handle,
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195 void (*runFunction)(LADSPA_Handle)) :
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196 m_handle(handle),
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197 m_runFunction(runFunction),
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198 m_exiting(false) { }
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199
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200 virtual void run();
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201 void setExiting() { m_exiting = true; }
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202
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203 protected:
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204 LADSPA_Handle m_handle;
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205 void (*m_runFunction)(LADSPA_Handle);
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206 bool m_exiting;
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207 };
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208 static std::map<LADSPA_Handle, std::set<NonRTPluginThread *> > m_threads;
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209 };
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210
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211 #endif // _DSSIPLUGININSTANCE_H_
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212
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