diff transform/ModelTransformerFactory.h @ 388:370aa9714ef5

* Move plugin/transform to plain transform.  This way transform can depend on
  model and GUI classes, but plugin doesn't have to.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/transform/ModelTransformerFactory.h	Wed Mar 12 18:02:17 2008 +0000
@@ -0,0 +1,96 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam and QMUL.
+   
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _MODEL_TRANSFORMER_FACTORY_H_
+#define _MODEL_TRANSFORMER_FACTORY_H_
+
+#include "Transform.h"
+#include "TransformDescription.h"
+
+#include "ModelTransformer.h"
+
+#include <map>
+#include <set>
+
+namespace Vamp { class PluginBase; }
+
+class AudioCallbackPlaySource;
+
+class ModelTransformerFactory : public QObject
+{
+    Q_OBJECT
+
+public:
+    virtual ~ModelTransformerFactory();
+
+    static ModelTransformerFactory *getInstance();
+
+    /**
+     * Fill out the configuration for the given transform (by asking
+     * the user, most likely).  Returns the selected input model and
+     * channel if the transform is acceptable, or an input with a null
+     * model if the operation should be cancelled.  Audio callback
+     * play source may be used to audition effects plugins, if
+     * provided.
+     */
+    ModelTransformer::Input
+    getConfigurationForTransform(Transform &transform,
+                                 const std::vector<Model *> &candidateInputModels,
+                                 Model *defaultInputModel,
+                                 AudioCallbackPlaySource *source = 0,
+                                 size_t startFrame = 0,
+                                 size_t duration = 0);
+    
+    /**
+     * Return the output model resulting from applying the named
+     * transform to the given input model.  The transform may still be
+     * working in the background when the model is returned; check the
+     * output model's isReady completion status for more details.
+     *
+     * If the transform is unknown or the input model is not an
+     * appropriate type for the given transform, or if some other
+     * problem occurs, return 0.  Set message if there is any error or
+     * warning to report.
+     * 
+     * The returned model is owned by the caller and must be deleted
+     * when no longer needed.
+     */
+    Model *transform(const Transform &transform,
+                     const ModelTransformer::Input &input,
+                     QString &message);
+
+protected slots:
+    void transformerFinished();
+
+    void modelAboutToBeDeleted(Model *);
+
+protected:
+    ModelTransformer *createTransformer(const Transform &transform,
+                                        const ModelTransformer::Input &input);
+
+    typedef std::map<TransformId, QString> TransformerConfigurationMap;
+    TransformerConfigurationMap m_lastConfigurations;
+
+    typedef std::set<ModelTransformer *> TransformerSet;
+    TransformerSet m_runningTransformers;
+
+    bool getChannelRange(TransformId identifier,
+                         Vamp::PluginBase *plugin, int &min, int &max);
+
+    static ModelTransformerFactory *m_instance;
+};
+
+
+#endif