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livetrax/libs/ardour/analyser.cc

140 lines
3.5 KiB
C++

/*
* Copyright (C) 2008-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2008-2016 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2008 Nick Mainsbridge <mainsbridge@gmail.com>
* Copyright (C) 2015-2016 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ardour/analyser.h"
#include "ardour/audiofilesource.h"
#include "ardour/rc_configuration.h"
#include "ardour/session_event.h"
#include "ardour/transient_detector.h"
#include "pbd/compose.h"
#include "pbd/error.h"
#include "pbd/pthread_utils.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
Analyser* Analyser::the_analyser = 0;
Glib::Threads::Mutex Analyser::analysis_active_lock;
Glib::Threads::Mutex Analyser::analysis_queue_lock;
Glib::Threads::Cond Analyser::SourcesToAnalyse;
list<boost::weak_ptr<Source> > Analyser::analysis_queue;
Analyser::Analyser ()
{
}
Analyser::~Analyser ()
{
}
static void
analyser_work ()
{
pthread_set_name ("Analyzer");
Analyser::work ();
}
void
Analyser::init ()
{
Glib::Threads::Thread::create (sigc::ptr_fun (analyser_work));
}
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::Threads::Mutex::Lock lm (analysis_queue_lock);
analysis_queue.push_back (boost::weak_ptr<Source>(src));
SourcesToAnalyse.broadcast ();
}
void
Analyser::work ()
{
SessionEvent::create_per_thread_pool ("Analyser", 64);
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(afs->natural_position())) {
Glib::Threads::Mutex::Lock lm (analysis_active_lock);
analyse_audio_file_source (afs);
}
}
}
void
Analyser::analyse_audio_file_source (boost::shared_ptr<AudioFileSource> src)
{
AnalysisFeatureList results;
try {
TransientDetector td (src->sample_rate());
td.set_sensitivity (3, Config->get_transient_sensitivity()); // "General purpose"
if (td.run (src->get_transients_path(), src.get(), 0, results) == 0) {
src->set_been_analysed (true);
} else {
src->set_been_analysed (false);
}
} catch (...) {
error << string_compose(_("Transient Analysis failed for %1."), _("Audio File Source")) << endmsg;;
src->set_been_analysed (false);
return;
}
}
void
Analyser::flush ()
{
Glib::Threads::Mutex::Lock lq (analysis_queue_lock);
Glib::Threads::Mutex::Lock la (analysis_active_lock);
analysis_queue.clear();
}