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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 and QMUL.
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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 #ifndef _MODEL_TRANSFORMER_FACTORY_H_
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17 #define _MODEL_TRANSFORMER_FACTORY_H_
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18
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19 #include "Transform.h"
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20 #include "TransformDescription.h"
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21
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22 #include "ModelTransformer.h"
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23
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24 #include "PluginTransformer.h"
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25
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26 #include <map>
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27 #include <set>
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28
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29 namespace Vamp { class PluginBase; }
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30
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31 class AudioCallbackPlaySource;
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32
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33 //!!! split into TransformFactory (information about available
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34 // transforms, create default Transform for each transform ID etc) and
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35 // TransformerFactory (create Transformers to apply transforms)
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36
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37 class ModelTransformerFactory : public QObject
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38 {
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39 Q_OBJECT
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40
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41 public:
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42 virtual ~ModelTransformerFactory();
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43
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44 static ModelTransformerFactory *getInstance();
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45
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46 TransformList getAllTransforms();
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47
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48 std::vector<QString> getAllTransformerTypes();
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49
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50 std::vector<QString> getTransformerCategories(QString transformType);
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51 std::vector<QString> getTransformerMakers(QString transformType);
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52
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53 /**
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54 * Get a configuration XML string for the given transform (by
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55 * asking the user, most likely). Returns the selected input
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56 * model if the transform is acceptable, 0 if the operation should
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57 * be cancelled. Audio callback play source may be used to
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58 * audition effects plugins, if provided.
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59 */
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60 Model *getConfigurationForTransformer(TransformId identifier,
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61 const std::vector<Model *> &candidateInputModels,
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62 PluginTransformer::ExecutionContext &context,
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63 QString &configurationXml,
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64 AudioCallbackPlaySource *source = 0,
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65 size_t startFrame = 0,
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66 size_t duration = 0);
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67
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68 /**
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69 * Get the default execution context for the given transform
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70 * and input model (if known).
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71 */
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72 PluginTransformer::ExecutionContext getDefaultContextForTransformer(TransformId identifier,
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73 Model *inputModel = 0);
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74
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75 /**
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76 * Return the output model resulting from applying the named
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77 * transform to the given input model. The transform may still be
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78 * working in the background when the model is returned; check the
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79 * output model's isReady completion status for more details.
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80 *
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81 * If the transform is unknown or the input model is not an
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82 * appropriate type for the given transform, or if some other
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83 * problem occurs, return 0.
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84 *
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85 * The returned model is owned by the caller and must be deleted
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86 * when no longer needed.
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87 */
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88 Model *transform(TransformId identifier, Model *inputModel,
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89 const PluginTransformer::ExecutionContext &context,
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90 QString configurationXml = "");
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91
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92 /**
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93 * Return true if the given transform is known.
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94 */
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95 bool haveTransformer(TransformId identifier);
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96
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97 /**
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98 * Full name of a transform, suitable for putting on a menu.
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99 */
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100 QString getTransformerName(TransformId identifier);
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101
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102 /**
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103 * Brief but friendly name of a transform, suitable for use
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104 * as the name of the output layer.
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105 */
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106 QString getTransformerFriendlyName(TransformId identifier);
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107
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108 QString getTransformerUnits(TransformId identifier);
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109
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110 /**
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111 * Return true if the transform has any configurable parameters,
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112 * i.e. if getConfigurationForTransformer can ever return a non-trivial
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113 * (not equivalent to empty) configuration string.
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114 */
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115 bool isTransformerConfigurable(TransformId identifier);
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116
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117 /**
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118 * If the transform has a prescribed number or range of channel
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119 * inputs, return true and set minChannels and maxChannels to the
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120 * minimum and maximum number of channel inputs the transform can
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121 * accept. Return false if it doesn't care.
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122 */
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123 bool getTransformerChannelRange(TransformId identifier,
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124 int &minChannels, int &maxChannels);
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125
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126 protected slots:
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127 void transformerFinished();
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128
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129 void modelAboutToBeDeleted(Model *);
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130
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131 protected:
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132 ModelTransformer *createTransformer(TransformId identifier, Model *inputModel,
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133 const PluginTransformer::ExecutionContext &context,
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134 QString configurationXml);
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135
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136 typedef std::map<TransformId, QString> TransformerConfigurationMap;
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137 TransformerConfigurationMap m_lastConfigurations;
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138
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139 typedef std::map<TransformId, TransformDescription> TransformDescriptionMap;
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140 TransformDescriptionMap m_transforms;
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141
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142 typedef std::set<ModelTransformer *> TransformerSet;
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143 TransformerSet m_runningTransformers;
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144
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145 void populateTransforms();
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146 void populateFeatureExtractionPlugins(TransformDescriptionMap &);
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147 void populateRealTimePlugins(TransformDescriptionMap &);
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148
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149 bool getChannelRange(TransformId identifier,
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150 Vamp::PluginBase *plugin, int &min, int &max);
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151
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152 static ModelTransformerFactory *m_instance;
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153 };
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154
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155
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156 #endif
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