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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 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7
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8 This program is free software; you can redistribute it and/or
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9 modify it under the terms of the GNU General Public License as
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10 published by the Free Software Foundation; either version 2 of the
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11 License, or (at your option) any later version. See the file
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12 COPYING included with this distribution for more information.
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13 */
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14
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15 /*
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16 This is a modified version of a source file from the
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17 Rosegarden MIDI and audio sequencer and notation editor.
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18 This file copyright 2000-2006 Chris Cannam.
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19 */
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20
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21 #ifndef _DSSIPLUGININSTANCE_H_
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22 #define _DSSIPLUGININSTANCE_H_
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23
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24 #define DSSI_API_LEVEL 2
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25
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26 #include <vector>
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27 #include <set>
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28 #include <map>
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29 #include <QString>
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30 #include <QMutex>
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31 #include <QThread>
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32
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33 #include "api/dssi.h"
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34
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35 #include "base/RingBuffer.h"
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36 #include "RealTimePluginInstance.h"
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37 #include "base/Scavenger.h"
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38
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39 class DSSIPluginInstance : public RealTimePluginInstance
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40 {
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41 public:
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42 virtual ~DSSIPluginInstance();
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43
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44 virtual bool isOK() const { return m_instanceHandle != 0; }
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45
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46 int getClientId() const { return m_client; }
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47 virtual QString getIdentifier() const { return m_identifier; }
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48 int getPosition() const { return m_position; }
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49
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50 virtual std::string getName() const;
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51 virtual std::string getDescription() const;
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52 virtual std::string getMaker() const;
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53 virtual int getPluginVersion() const;
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54 virtual std::string getCopyright() const;
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55
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56 virtual void run(const RealTime &);
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57
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58 virtual unsigned int getParameterCount() const;
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59 virtual void setParameterValue(unsigned int parameter, float value);
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60 virtual float getParameterValue(unsigned int parameter) const;
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61 virtual float getParameterDefault(unsigned int parameter) const;
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62
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63 virtual ParameterList getParameterDescriptors() const;
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64 virtual float getParameter(std::string) const;
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65 virtual void setParameter(std::string, float);
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66
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67 virtual std::string configure(std::string key, std::string value);
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68 virtual void sendEvent(const RealTime &eventTime,
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69 const void *event);
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70 virtual void clearEvents();
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71
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72 virtual size_t getBufferSize() const { return m_blockSize; }
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73 virtual size_t getAudioInputCount() const { return m_audioPortsIn.size(); }
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74 virtual size_t getAudioOutputCount() const { return m_idealChannelCount; }
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75 virtual sample_t **getAudioInputBuffers() { return m_inputBuffers; }
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76 virtual sample_t **getAudioOutputBuffers() { return m_outputBuffers; }
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77
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78 virtual ProgramList getPrograms() const;
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79 virtual std::string getCurrentProgram() const;
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80 virtual std::string getProgram(int bank, int program) const;
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81 virtual unsigned long getProgram(std::string name) const;
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82 virtual void selectProgram(std::string program);
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83
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84 virtual bool isBypassed() const { return m_bypassed; }
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85 virtual void setBypassed(bool bypassed) { m_bypassed = bypassed; }
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86
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87 virtual size_t getLatency();
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88
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89 virtual void silence();
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90 virtual void discardEvents();
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91 virtual void setIdealChannelCount(size_t channels); // may re-instantiate
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92
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93 virtual bool isInGroup() const { return m_grouped; }
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94 virtual void detachFromGroup();
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95
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96 virtual std::string getType() const { return "DSSI Real-Time Plugin"; }
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97
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98 protected:
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99 // To be constructed only by DSSIPluginFactory
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100 friend class DSSIPluginFactory;
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101
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102 // Constructor that creates the buffers internally
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103 //
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104 DSSIPluginInstance(RealTimePluginFactory *factory,
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105 int client,
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106 QString identifier,
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107 int position,
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108 unsigned long sampleRate,
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109 size_t blockSize,
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110 int idealChannelCount,
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111 const DSSI_Descriptor* descriptor);
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112
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113 void init();
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114 void instantiate(unsigned long sampleRate);
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115 void cleanup();
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116 void activate();
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117 void deactivate();
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118 void connectPorts();
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119
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120 bool handleController(snd_seq_event_t *ev);
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121 void setPortValueFromController(unsigned int portNumber, int controlValue);
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122 void selectProgramAux(std::string program, bool backupPortValues);
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123 void checkProgramCache() const;
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124
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125 void initialiseGroupMembership();
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126 void runGrouped(const RealTime &);
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127
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128 // For use in DSSIPluginFactory (set in the DSSI_Host_Descriptor):
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129 static int requestMidiSend(LADSPA_Handle instance,
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130 unsigned char ports,
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131 unsigned char channels);
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132 static void midiSend(LADSPA_Handle instance,
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133 snd_seq_event_t *events,
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134 unsigned long eventCount);
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135 static int requestNonRTThread(LADSPA_Handle instance,
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136 void (*runFunction)(LADSPA_Handle));
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137
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138 int m_client;
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139 int m_position;
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140 LADSPA_Handle m_instanceHandle;
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141 const DSSI_Descriptor *m_descriptor;
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142
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143 std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsIn;
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144 std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsOut;
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145
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146 std::vector<LADSPA_Data> m_backupControlPortsIn;
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147
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148 std::map<int, int> m_controllerMap;
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149
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150 std::vector<int> m_audioPortsIn;
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151 std::vector<int> m_audioPortsOut;
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152
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153 struct ProgramControl {
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154 int msb;
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155 int lsb;
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156 int program;
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157 };
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158 ProgramControl m_pending;
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159
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160 struct ProgramDescriptor {
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161 int bank;
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162 int program;
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163 std::string name;
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164 };
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165 mutable std::vector<ProgramDescriptor> m_cachedPrograms;
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166 mutable bool m_programCacheValid;
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167
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168 RingBuffer<snd_seq_event_t> m_eventBuffer;
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169
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170 size_t m_blockSize;
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171 sample_t **m_inputBuffers;
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172 sample_t **m_outputBuffers;
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173 bool m_ownBuffers;
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174 size_t m_idealChannelCount;
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175 size_t m_outputBufferCount;
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176 size_t m_sampleRate;
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177 float *m_latencyPort;
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178 bool m_run;
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179
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180 bool m_bypassed;
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181 std::string m_program;
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182 bool m_grouped;
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183 RealTime m_lastRunTime;
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184
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185 RealTime m_lastEventSendTime;
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186 bool m_haveLastEventSendTime;
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187
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188 QMutex m_processLock;
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189
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190 typedef std::set<DSSIPluginInstance *> PluginSet;
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191 typedef std::map<QString, PluginSet> GroupMap;
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192 static GroupMap m_groupMap;
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193 static snd_seq_event_t **m_groupLocalEventBuffers;
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194 static size_t m_groupLocalEventBufferCount;
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195
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196 static Scavenger<ScavengerArrayWrapper<snd_seq_event_t *> > m_bufferScavenger;
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197
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198 class NonRTPluginThread : public QThread
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199 {
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200 public:
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201 NonRTPluginThread(LADSPA_Handle handle,
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202 void (*runFunction)(LADSPA_Handle)) :
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203 m_handle(handle),
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204 m_runFunction(runFunction),
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205 m_exiting(false) { }
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206
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207 virtual void run();
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208 void setExiting() { m_exiting = true; }
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209
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210 protected:
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211 LADSPA_Handle m_handle;
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212 void (*m_runFunction)(LADSPA_Handle);
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213 bool m_exiting;
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214 };
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215 static std::map<LADSPA_Handle, std::set<NonRTPluginThread *> > m_threads;
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216 };
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217
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218 #endif // _DSSIPLUGININSTANCE_H_
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219
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