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1 /* -*- c-basic-offset: 4 -*- 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
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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 2000-2005 Chris Cannam.
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14 */
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15
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16 #ifndef _REALTIME_PLUGIN_FACTORY_H_
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17 #define _REALTIME_PLUGIN_FACTORY_H_
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18
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19 #include <QString>
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20 #include <vector>
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21
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22 class RealTimePluginInstance;
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23
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24 class RealTimePluginFactory
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25 {
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26 public:
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27 static RealTimePluginFactory *instance(QString pluginType);
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28 static RealTimePluginFactory *instanceFor(QString identifier);
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29 static std::vector<QString> getAllPluginIdentifiers();
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30 static void enumerateAllPlugins(std::vector<QString> &);
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31
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32 static void setSampleRate(int sampleRate) { m_sampleRate = sampleRate; }
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33
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34 /**
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35 * Look up the plugin path and find the plugins in it. Called
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36 * automatically after construction of a factory.
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37 */
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38 virtual void discoverPlugins() = 0;
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39
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40 /**
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41 * Return a reference to a list of all plugin identifiers that can
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42 * be created by this factory.
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43 */
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44 virtual const std::vector<QString> &getPluginIdentifiers() const = 0;
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45
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46 /**
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47 * Append to the given list descriptions of all the available
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48 * plugins and their ports. This is in a standard format, see
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49 * the LADSPA implementation for details.
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50 */
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51 virtual void enumeratePlugins(std::vector<QString> &list) = 0;
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52
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53 /**
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54 * Instantiate a plugin.
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55 */
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56 virtual RealTimePluginInstance *instantiatePlugin(QString identifier,
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57 int clientId,
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58 int position,
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59 unsigned int sampleRate,
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60 unsigned int blockSize,
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61 unsigned int channels) = 0;
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62
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63 protected:
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64 RealTimePluginFactory() { }
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65
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66 // for call by RealTimePluginInstance dtor
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67 virtual void releasePlugin(RealTimePluginInstance *, QString identifier) = 0;
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68 friend class RealTimePluginInstance;
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69
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70 static int m_sampleRate;
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71 };
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72
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73 #endif
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