X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Ftransient_detector.cc;h=5c92d2c843a51d559de26f2c28c5fc9b5982768d;hb=422e462c12bcea577a530bbdf4c2b651ba9f7ea4;hp=da167e4bd674020b8f967dc9ebfdc95adeacf8e0;hpb=e0aaed6d65f160c328cb8b56d7c6552ee15d65e2;p=ardour.git

diff --git a/libs/ardour/transient_detector.cc b/libs/ardour/transient_detector.cc
index da167e4bd6..5c92d2c843 100644
--- a/libs/ardour/transient_detector.cc
+++ b/libs/ardour/transient_detector.cc
@@ -1,3 +1,25 @@
+/*
+    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"
@@ -8,18 +30,20 @@ using namespace std;
 
 /* need a static initializer function for this */
 
-string TransientDetector::_op_id = X_("libardourvampplugins:percussiononsets:2");
+string TransientDetector::_op_id = X_("libardourvampplugins:qm-onsetdetector:2");
 
 TransientDetector::TransientDetector (float sr)
-	: AudioAnalyser (sr, X_("libardourvampplugins:percussiononsets"))
+	: AudioAnalyser (sr, X_("libardourvampplugins:qm-onsetdetector"))
 {
 	/* update the op_id */
 
-	_op_id = X_("libardourvampplugins:percussiononsets");
-	
+	_op_id = X_("libardourvampplugins:qm-onsetdetector");
+
 	// XXX this should load the above-named plugin and get the current version
-	
+
 	_op_id += ":2";
+
+	threshold = 0.00;
 }
 
 TransientDetector::~TransientDetector()
@@ -39,6 +63,7 @@ TransientDetector::run (const std::string& path, Readable* src, uint32_t channel
 	int ret = analyse (path, src, channel);
 
 	current_results = 0;
+
 	return ret;
 }
 
@@ -48,14 +73,14 @@ TransientDetector::use_features (Plugin::FeatureSet& features, ostream* out)
 	const Plugin::FeatureList& fl (features[0]);
 
 	for (Plugin::FeatureList::const_iterator f = fl.begin(); f != fl.end(); ++f) {
-		
-		if ((*f).hasTimestamp) {
+
+		if (f->hasTimestamp) {
 
 			if (out) {
 				(*out) << (*f).timestamp.toString() << endl;
-			} 
-			
-			current_results->push_back (RealTime::realTime2Frame ((*f).timestamp, (nframes_t) floor(sample_rate)));
+			}
+
+			current_results->push_back (RealTime::realTime2Frame (f->timestamp, (framecnt_t) floor(sample_rate)));
 		}
 	}
 
@@ -65,15 +90,14 @@ TransientDetector::use_features (Plugin::FeatureSet& features, ostream* out)
 void
 TransientDetector::set_threshold (float val)
 {
-	if (plugin) {
-		plugin->setParameter ("threshold", val);
-	}
+	threshold = val;
 }
 
 void
 TransientDetector::set_sensitivity (float val)
 {
 	if (plugin) {
+		plugin->selectProgram ("Percussive onsets");
 		plugin->setParameter ("sensitivity", val);
 	}
 }
@@ -86,23 +110,23 @@ TransientDetector::cleanup_transients (AnalysisFeatureList& t, float sr, float g
 	}
 
 	t.sort ();
-	
+
 	/* remove duplicates or other things that are too close */
-	
+
 	AnalysisFeatureList::iterator i = t.begin();
 	AnalysisFeatureList::iterator f, b;
-	const nframes64_t gap_frames = (nframes64_t) floor (gap_msecs * (sr / 1000.0));
-	
+	const framecnt_t gap_frames = (framecnt_t) floor (gap_msecs * (sr / 1000.0));
+
 	while (i != t.end()) {
 
 		// move front iterator to just past i, and back iterator the same place
-		
+
 		f = i;
 		++f;
 		b = f;
 
 		// move f until we find a new value that is far enough away
-		
+
 		while ((f != t.end()) && (((*f) - (*i)) < gap_frames)) {
 			++f;
 		}
@@ -116,3 +140,44 @@ TransientDetector::cleanup_transients (AnalysisFeatureList& t, float sr, float g
 		}
 	}
 }
+
+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;
+}