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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 Vampipe
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5
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6 Centre for Digital Music, Queen Mary, University of London.
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7 Copyright 2006-2016 Chris Cannam and QMUL.
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8
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9 Permission is hereby granted, free of charge, to any person
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10 obtaining a copy of this software and associated documentation
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11 files (the "Software"), to deal in the Software without
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12 restriction, including without limitation the rights to use, copy,
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13 modify, merge, publish, distribute, sublicense, and/or sell copies
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14 of the Software, and to permit persons to whom the Software is
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15 furnished to do so, subject to the following conditions:
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16
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17 The above copyright notice and this permission notice shall be
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18 included in all copies or substantial portions of the Software.
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19
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20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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24 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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25 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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27
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28 Except as contained in this notice, the names of the Centre for
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29 Digital Music; Queen Mary, University of London; and Chris Cannam
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30 shall not be used in advertising or otherwise to promote the sale,
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31 use or other dealings in this Software without prior written
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32 authorization.
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33 */
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34
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35 #ifndef VAMPIPE_CONSTANT_PLUGIN_HANDLE_MAPPER_H
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36 #define VAMPIPE_CONSTANT_PLUGIN_HANDLE_MAPPER_H
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37
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38 #include "PluginHandleMapper.h"
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39
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40 namespace vampipe {
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41
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42 /**
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43 * A trivial PluginHandleMapper, to be used for tests and for
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44 * translating between protocols that contain handles without actually
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45 * loading any plugins.
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46 *
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47 * This mapper only knows about one handle, and if it is asked for
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48 * that one, it returns a fixed plugin pointer (which might never be
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49 * dereferenced, depending on the context in which this class is
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50 * used). The idea would be to create one of these on the fly each
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51 * time a new handle needs to be translated.
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52 */
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53 class ConstantPluginHandleMapper : public PluginHandleMapper
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54 {
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55 public:
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56 ConstantPluginHandleMapper(Vamp::Plugin *plugin, int32_t handle) :
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57 m_plugin(plugin), m_handle(handle) { }
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58
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59 virtual int32_t pluginToHandle(Vamp::Plugin *p) {
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60 if (p == m_plugin) return m_handle;
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61 else throw NotFound();
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62 }
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63
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64 virtual Vamp::Plugin *handleToPlugin(int32_t h) {
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65 if (h == m_handle) return m_plugin;
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66 else throw NotFound();
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67 }
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68
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69 private:
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70 Vamp::Plugin *m_plugin;
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71 int32_t m_handle;
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72 };
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73
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74 }
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75
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76 #endif
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