Support FFT for multi channel tracks and fix analysis for tape track regions.

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@3279 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/gtk2_ardour/analysis_window.cc b/gtk2_ardour/analysis_window.cc
index 8f84febbba011d6fbff446de695d9f1703d89076..37bb604807df45773be462f68a208d00987daccf 100644 (file)
--- a/gtk2_ardour/analysis_window.cc
+++ b/gtk2_ardour/analysis_window.cc
@@ -262,7 +262,8 @@ AnalysisWindow::analyze_data (Gtk::Button *button)
                                continue;
 
                        RouteUI *rui = dynamic_cast<RouteUI *>(*i);
-                       
+                       int n_inputs = rui->route()->n_inputs();
+
                        // Busses don't have playlists, so we need to check that we actually are working with a playlist
                        if (!pl || !rui)
                                continue;
@@ -275,29 +276,31 @@ AnalysisWindow::analyze_data (Gtk::Button *button)
                                
                                for (std::list<AudioRange>::iterator j = ts.begin(); j != ts.end(); ++j) {
 
-                                       nframes_t i = 0;
                                        int n;
-                       
-                                       while ( i < (*j).length() ) {
-                                               // TODO: What about stereo+ channels? composite all to one, I guess
+                                       for (int channel = 0; channel < n_inputs; channel++) {
+                                               nframes_t x = 0;
 
-                                               n = fft_graph.windowSize();
+                                               while ( x < (*j).length() ) {
+                                                       // TODO: What about stereo+ channels? composite all to one, I guess
 
-                                               if (i + n >= (*j).length() ) {
-                                                       n = (*j).length() - i;
-                                               }
-                               
-                                               n = pl->read(buf, mixbuf, gain, (*j).start + i, n);
-       
-                                               if ( n < fft_graph.windowSize()) {
-                                                       for (int j = n; j < fft_graph.windowSize(); j++) {
-                                                               buf[j] = 0.0;
+                                                       n = fft_graph.windowSize();
+
+                                                       if (x + n >= (*j).length() ) {
+                                                               n = (*j).length() - x;
+                                                       }
+
+                                                       n = pl->read(buf, mixbuf, gain, (*j).start + x, n, channel);
+
+                                                       if ( n < fft_graph.windowSize()) {
+                                                               for (int j = n; j < fft_graph.windowSize(); j++) {
+                                                                       buf[j] = 0.0;
+                                                               }
                                                        }
+
+                                                       res->analyzeWindow(buf);
+
+                                                       x += n;
                                                }
-       
-                                               res->analyzeWindow(buf);
-                               
-                                               i += n;
                                        }
                                }
                        } else if (source_selection_regions_rb.get_active()) {
@@ -316,28 +319,36 @@ AnalysisWindow::analyze_data (Gtk::Button *button)
                                                continue;
 
 //                                     cerr << " - " << (*j)->region().name() << ": " << (*j)->region().length() << " samples starting at " << (*j)->region().position() << endl;
-                                       nframes_t i = 0;
                                        int n;
+                                       for (int channel = 0; channel < n_inputs; channel++) {
 
-                                       while ( i < arv->region()->length() ) {
-                                               // TODO: What about stereo+ channels? composite all to one, I guess
+                                               nframes_t x = 0;
 
-                                               n = fft_graph.windowSize();
-                                               if (i + n >= arv->region()->length() ) {
-                                                       n = arv->region()->length() - i;
-                                               }
+                                               nframes_t length = arv->region()->length();
 
-                                               n = arv->audio_region()->read_at(buf, mixbuf, gain, arv->region()->position() + i, n);
-       
-                                               if ( n < fft_graph.windowSize()) {
-                                                       for (int j = n; j < fft_graph.windowSize(); j++) {
-                                                               buf[j] = 0.0;
+                                               while ( x < length ) {
+                                                       // TODO: What about stereo+ channels? composite all to one, I guess
+
+                                                       n = fft_graph.windowSize();
+                                                       if (x + n >= length ) {
+                                                               n = length - x;
                                                        }
+
+                                                       n = arv->audio_region()->read_at(buf, mixbuf, gain, arv->region()->position() + x, n, channel);
+
+                                                       if (n == 0)
+                                                               break;
+
+                                                       if ( n < fft_graph.windowSize()) {
+                                                               for (int j = n; j < fft_graph.windowSize(); j++) {
+                                                                       buf[j] = 0.0;
+                                                               }
+                                                       }
+
+                                                       res->analyzeWindow(buf);
+
+                                                       x += n;
                                                }
-       
-                                               res->analyzeWindow(buf);
-                               
-                                               i += n;
                                        }
 //                                     cerr << "Found: " << (*j)->get_item_name() << endl;