+/*
+ Copyright (C) 2012 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 <cmath>
+
+#include "ardour/readable.h"
#include "ardour/transient_detector.h"
-#include "i18n.h"
+#include "pbd/i18n.h"
using namespace Vamp;
using namespace ARDOUR;
/* need a static initializer function for this */
-string TransientDetector::_op_id = X_("libardourvampplugins:percussiononsets:2");
+string TransientDetector::_op_id = X_("qm-onset");
TransientDetector::TransientDetector (float sr)
- : AudioAnalyser (sr, X_("libardourvampplugins:percussiononsets"))
+ : AudioAnalyser (sr, X_("libardourvampplugins:qm-onsetdetector"))
{
- /* update the op_id */
-
- _op_id = X_("libardourvampplugins:percussiononsets");
-
- // XXX this should load the above-named plugin and get the current version
-
- _op_id += ":2";
+ threshold = 0.00;
}
TransientDetector::~TransientDetector()
int ret = analyse (path, src, channel);
current_results = 0;
+
return ret;
}
void
TransientDetector::set_threshold (float val)
{
- if (plugin) {
- plugin->setParameter ("threshold", val);
- }
+ threshold = val;
}
void
-TransientDetector::set_sensitivity (float val)
+TransientDetector::set_sensitivity (uint32_t mode, float val)
{
if (plugin) {
- plugin->setParameter ("sensitivity", val);
+ // see libs/vamp-plugins/OnsetDetect.cpp
+ //plugin->selectProgram ("General purpose"); // dftype = 3, sensitivity = 50, whiten = 0 (default)
+ //plugin->selectProgram ("Percussive onsets"); // dftype = 4, sensitivity = 40, whiten = 0
+ plugin->setParameter ("dftype", mode);
+ plugin->setParameter ("sensitivity", std::min (100.f, std::max (0.f, val)));
+ plugin->setParameter ("whiten", 0);
}
}
// move f until we find a new value that is far enough away
- while ((f != t.end()) && (((*f) - (*i)) < gap_frames)) {
+ while ((f != t.end()) && gap_frames > 0 && (((*f) - (*i)) < gap_frames)) {
++f;
}
}
}
}
+
+void
+TransientDetector::update_positions (Readable* src, uint32_t channel, AnalysisFeatureList& positions)
+{
+ int const buff_size = 1024;
+ int const step_size = 64;
+
+ Sample* data = new Sample[buff_size];
+
+ AnalysisFeatureList::iterator i = positions.begin();
+
+ while (i != positions.end()) {
+
+ /* read from source */
+ framecnt_t const to_read = buff_size;
+
+ if (src->read (data, (*i) - buff_size, to_read, channel) != to_read) {
+ break;
+ }
+
+ // Simple heuristic for locating approx correct cut position.
+
+ for (int j = 0; j < (buff_size - step_size); ) {
+
+ Sample const s = abs (data[j]);
+ Sample const s2 = abs (data[j + step_size]);
+
+ if ((s2 - s) > threshold) {
+ //cerr << "Thresh exceeded. Moving pos from: " << (*i) << " to: " << (*i) - buff_size + (j + 16) << endl;
+ (*i) = (*i) - buff_size + (j + 24);
+ break;
+ }
+
+ j += step_size;
+ }
+
+ ++i;
+ }
+
+ delete [] data;
+}