comparison transform/FeatureWriter.h @ 1005:6b2a8b34e9d3

Add setNofM logic which the JSON writer can use to write a list when sending multiple files' worth to a single target

     protected:
         QString m_trackId;
         QString m_transformId;
     };
 
+    /**
+     * Notify the writer that we are about to start extraction for
+     * input file N of M (where N is 1..M). May be useful when writing
+     * multiple outputs into a single file where some syntactic
+     * element is needed to connect them.
+     */
+    virtual void setNofM(int /* N */, int /* M */) { }
+
     // may throw FailedToOpenFile or other exceptions
-
     virtual void write(QString trackid,
                        const Transform &transform,
                        const Vamp::Plugin::OutputDescriptor &output,
                        const Vamp::Plugin::FeatureList &features,
                        std::string summaryType = "") = 0;