Merge with 2.0-ongoing R2988

[ardour.git] / libs / ardour / analyser.cc

diff --git a/libs/ardour/analyser.cc b/libs/ardour/analyser.cc
new file mode 100644 (file)
index 0000000..7ddb542
--- /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) {
+                       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);
+       }
+
+}
+
+