disk buffer stats patch ported from 2.X

git-svn-id: svn://localhost/ardour2/branches/3.0@5014 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 59 insertions, 0 deletions

diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index ce435c4ad5..861feef6aa 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -909,8 +909,14 @@ void
 ARDOUR_UI::update_buffer_load ()
 {
 	char buf[64];
+	uint32_t c, p;
 
 	if (session) {
+		c = session->capture_load ();
+		p = session->playback_load ();
+		
+		push_buffer_stats (c, p);
+
 		snprintf (buf, sizeof (buf), _("Buffers p:%" PRIu32 "%% c:%" PRIu32 "%%"), 
 			  session->playback_load(), session->capture_load());
 		buffer_load_label.set_text (buf);
@@ -2933,10 +2939,60 @@ ARDOUR_UI::xrun_handler(nframes_t where)
 }
 
 void
+ARDOUR_UI::push_buffer_stats (uint32_t capture, uint32_t playback)
+{
+	time_t now;
+	time (&now);
+
+	while (disk_buffer_stats.size() > 60) {
+		disk_buffer_stats.pop_front ();
+	}
+
+	disk_buffer_stats.push_back (DiskBufferStat (now, capture, playback));
+}
+
+void
+ARDOUR_UI::write_buffer_stats ()
+{
+	std::ofstream fout;
+	struct tm tm;
+	char buf[64];
+	char* path;
+
+	if ((path = tempnam (0, "ardourBuffering")) == 0) {
+		cerr << X_("cannot find temporary name for ardour buffer stats") << endl;
+		return;
+	}
+
+	fout.open (path);
+
+	if (!fout) {
+		cerr << string_compose (X_("cannot open file %1 for ardour buffer stats"), path) << endl;
+		return;
+	}
+
+	for (list<DiskBufferStat>::iterator i = disk_buffer_stats.begin(); i != disk_buffer_stats.end(); ++i) {
+		localtime_r (&(*i).when, &tm);
+		strftime (buf, sizeof (buf), "%T", &tm);
+		fout << buf << ' ' << (*i).capture << ' ' << (*i).playback << endl;
+	}
+	
+	disk_buffer_stats.clear ();
+
+	fout.close ();
+
+	cerr << "Ardour buffering statistics can be found in: " << path << endl;
+	free (path);
+}
+
+void
 ARDOUR_UI::disk_overrun_handler ()
 {
+
 	ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::disk_overrun_handler));
 
+	write_buffer_stats ();
+
 	if (!have_disk_speed_dialog_displayed) {
 		have_disk_speed_dialog_displayed = true;
 		MessageDialog* msg = new MessageDialog (*editor, _("\
@@ -2953,8 +3009,11 @@ quickly enough to keep up with recording.\n"));
 void
 ARDOUR_UI::disk_underrun_handler ()
 {
+
 	ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::disk_underrun_handler));
 
+	write_buffer_stats ();
+
 	if (!have_disk_speed_dialog_displayed) {
 		have_disk_speed_dialog_displayed = true;
 		MessageDialog* msg = new MessageDialog (*editor,