From 449aab3c465bbbf66d221fac3d7ea559f1720357 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 2 Jun 2008 21:41:35 +0000
Subject: rollback to 3428, before the mysterious removal of libs/* at
 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/analyser.cc | 119 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 libs/ardour/analyser.cc

(limited to 'libs/ardour/analyser.cc')

diff --git a/libs/ardour/analyser.cc b/libs/ardour/analyser.cc
new file mode 100644
index 0000000000..2e14c74b86
--- /dev/null
+++ b/libs/ardour/analyser.cc
@@ -0,0 +1,119 @@
+/*
+    Copyright (C) 2008 Paul Davis 
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <ardour/analyser.h>
+#include <ardour/audiofilesource.h>
+#include <ardour/transient_detector.h>
+
+#include <pbd/pthread_utils.h>
+#include <pbd/convert.h>
+
+using namespace std;
+using namespace sigc;
+using namespace ARDOUR;
+using namespace PBD;
+
+Analyser* Analyser::the_analyser = 0;
+Glib::StaticMutex Analyser::analysis_queue_lock = GLIBMM_STATIC_MUTEX_INIT;
+Glib::Cond* Analyser::SourcesToAnalyse = 0;
+list<boost::weak_ptr<Source> > Analyser::analysis_queue;
+
+Analyser::Analyser ()
+{
+	
+}
+
+Analyser::~Analyser ()
+{
+}
+
+static void
+analyser_work ()
+{
+	Analyser::work ();
+}
+
+void
+Analyser::init ()
+{
+	SourcesToAnalyse = new Glib::Cond();
+	Glib::Thread::create (sigc::ptr_fun (analyser_work), false);
+}
+
+void
+Analyser::queue_source_for_analysis (boost::shared_ptr<Source> src, bool force)
+{
+	if (!src->can_be_analysed()) {
+		return;
+	}
+
+	if (!force && src->has_been_analysed()) {
+		return;
+	}
+
+	Glib::Mutex::Lock lm (analysis_queue_lock);
+	analysis_queue.push_back (boost::weak_ptr<Source>(src));
+	SourcesToAnalyse->broadcast ();
+}
+
+void
+Analyser::work ()
+{
+	PBD::ThreadCreated (pthread_self(), string ("analyser-") + to_string (pthread_self(), std::dec));
+
+	while (true) {
+		analysis_queue_lock.lock ();
+
+	  wait:
+		if (analysis_queue.empty()) {
+			SourcesToAnalyse->wait (analysis_queue_lock);
+		}
+
+		if (analysis_queue.empty()) {
+			goto wait;
+		}
+
+		boost::shared_ptr<Source> src (analysis_queue.front().lock());
+		analysis_queue.pop_front();
+		analysis_queue_lock.unlock ();
+
+		boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
+
+		if (afs && afs->length()) {
+			analyse_audio_file_source (afs);
+		}
+	}
+}
+
+void
+Analyser::analyse_audio_file_source (boost::shared_ptr<AudioFileSource> src)
+{
+	AnalysisFeatureList results;
+
+	TransientDetector td (src->sample_rate());
+
+	if (td.run (src->get_transients_path(), src.get(), 0, results) == 0) {
+		src->set_been_analysed (true);
+	} else {
+		src->set_been_analysed (false);
+	}
+
+}
+
+		
-- 
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