only instantiate Analysis Processor if needed

diff --git a/libs/ardour/export_graph_builder.cc b/libs/ardour/export_graph_builder.cc
index 85857f21efb81cfabd17cea6f53e336839464d5c..bdcdf2620e21f924ddb087895ea5edf28ef3122a 100644 (file)
--- a/libs/ardour/export_graph_builder.cc
+++ b/libs/ardour/export_graph_builder.cc
@@ -305,10 +305,10 @@ ExportGraphBuilder::SFC::SFC (ExportGraphBuilder &parent, FileSpec const & new_c
        config = new_config;
        data_width = sndfile_data_width (Encoder::get_real_format (config));
        unsigned channels = new_config.channel_config->get_n_chans();
-       analyser.reset (new Analyser (config.format->sample_rate(), channels, max_frames,
-                               (framecnt_t) ceil (parent.timespan->get_length () * config.format->sample_rate () / (double) parent.session.nominal_frame_rate ())));
        _analyse = config.format->analyse();
        if (_analyse) {
+               analyser.reset (new Analyser (config.format->sample_rate(), channels, max_frames,
+                                       (framecnt_t) ceil (parent.timespan->get_length () * config.format->sample_rate () / (double) parent.session.nominal_frame_rate ())));
                parent.add_analyser (config.filename->get_path (config.format), analyser);
        }
 
@@ -316,18 +316,19 @@ ExportGraphBuilder::SFC::SFC (ExportGraphBuilder &parent, FileSpec const & new_c
                short_converter = ShortConverterPtr (new SampleFormatConverter<short> (channels));
                short_converter->init (max_frames, config.format->dither_type(), data_width);
                add_child (config);
-               analyser->add_output (short_converter);
+               if (_analyse) { analyser->add_output (short_converter); }
+
        } else if (data_width == 24 || data_width == 32) {
                int_converter = IntConverterPtr (new SampleFormatConverter<int> (channels));
                int_converter->init (max_frames, config.format->dither_type(), data_width);
                add_child (config);
-               analyser->add_output (int_converter);
+               if (_analyse) { analyser->add_output (int_converter); }
        } else {
                int actual_data_width = 8 * sizeof(Sample);
                float_converter = FloatConverterPtr (new SampleFormatConverter<Sample> (channels));
                float_converter->init (max_frames, config.format->dither_type(), actual_data_width);
                add_child (config);
-               analyser->add_output (float_converter);
+               if (_analyse) { analyser->add_output (float_converter); }
        }
 }