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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 This file copyright 2006 Chris Cannam.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 /*
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17 This is a modified version of a source file from the
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18 Rosegarden MIDI and audio sequencer and notation editor.
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19 This file copyright 2000-2006 Chris Cannam.
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20 */
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21
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22 #ifndef _REALTIME_PLUGIN_FACTORY_H_
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23 #define _REALTIME_PLUGIN_FACTORY_H_
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24
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25 #include <QString>
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26 #include <vector>
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27
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28 class RealTimePluginInstance;
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29
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30 class RealTimePluginFactory
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31 {
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32 public:
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33 static RealTimePluginFactory *instance(QString pluginType);
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34 static RealTimePluginFactory *instanceFor(QString identifier);
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35 static std::vector<QString> getAllPluginIdentifiers();
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36 static void enumerateAllPlugins(std::vector<QString> &);
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37
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38 static void setSampleRate(int sampleRate) { m_sampleRate = sampleRate; }
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39
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40 /**
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41 * Look up the plugin path and find the plugins in it. Called
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42 * automatically after construction of a factory.
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43 */
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44 virtual void discoverPlugins() = 0;
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45
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46 /**
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47 * Return a reference to a list of all plugin identifiers that can
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48 * be created by this factory.
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49 */
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50 virtual const std::vector<QString> &getPluginIdentifiers() const = 0;
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51
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52 /**
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53 * Append to the given list descriptions of all the available
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54 * plugins and their ports. This is in a standard format, see
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55 * the LADSPA implementation for details.
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56 */
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57 virtual void enumeratePlugins(std::vector<QString> &list) = 0;
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58
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59 /**
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60 * Instantiate a plugin.
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61 */
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62 virtual RealTimePluginInstance *instantiatePlugin(QString identifier,
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63 int clientId,
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64 int position,
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65 unsigned int sampleRate,
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66 unsigned int blockSize,
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67 unsigned int channels) = 0;
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68
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69 protected:
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70 RealTimePluginFactory() { }
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71
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72 // for call by RealTimePluginInstance dtor
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73 virtual void releasePlugin(RealTimePluginInstance *, QString identifier) = 0;
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74 friend class RealTimePluginInstance;
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75
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76 static int m_sampleRate;
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77 };
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78
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79 #endif
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