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/*
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 <cassert>
#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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