/*
- Copyright (C) 2009 Paul Davis
+ Copyright (C) 2009 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
*/
+#include "pbd/property_list.h"
+
#include "ardour/strip_silence.h"
#include "ardour/audioregion.h"
#include "ardour/region_factory.h"
* @param minimum_length Minimum length of silence period to recognise, in samples.
* @param fade_length Length of fade in/out to apply to trimmed regions, in samples.
*/
-
+
StripSilence::StripSilence (Session & s, double threshold, nframes_t minimum_length, nframes_t fade_length)
: Filter (s), _threshold (threshold), _minimum_length (minimum_length), _fade_length (fade_length)
{
StripSilence::run (boost::shared_ptr<Region> r)
{
results.clear ();
-
+
/* we only operate on AudioRegions, for now, though this could be adapted to MIDI
- as well I guess */
+ as well I guess
+ */
boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
+ InterThreadInfo itt;
+
if (!region) {
results.push_back (r);
return -1;
}
/* find periods of silence in the region */
- std::list<std::pair<nframes_t, nframes_t> > const silence =
- region->find_silence (dB_to_coefficient (_threshold), _minimum_length);
+ std::list<std::pair<frameoffset_t, framecnt_t> > const silence =
+ region->find_silence (dB_to_coefficient (_threshold), _minimum_length, itt);
if (silence.size () == 1 && silence.front().first == 0 && silence.front().second == region->length() - 1) {
/* the region is all silence, so just return with nothing */
return 0;
}
- std::list<std::pair<nframes_t, nframes_t > >::const_iterator s = silence.begin ();
- nframes_t const pos = region->position ();
- nframes_t const end = region->start () + region->length() - 1;
- nframes_t const start = region->start ();
-
- region = boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region));
- region->set_name (session.new_region_name (region->name ()));
- boost::shared_ptr<AudioRegion> last_region = region;
- results.push_back (region);
-
- if (s->first == 0) {
- /* the region starts with some silence */
-
- /* we must set length to an intermediate value here, otherwise the call
- ** to set_start will fail */
- region->set_length (region->length() - s->second + _fade_length, 0);
- region->set_start (start + s->second - _fade_length, 0);
- region->set_position (pos + s->second - _fade_length, 0);
- region->set_fade_in_active (true);
- region->set_fade_in (AudioRegion::Linear, _fade_length);
- s++;
- }
+ std::list<std::pair<framepos_t, framecnt_t > >::const_iterator s = silence.begin ();
+ PBD::PropertyList plist;
+ framepos_t start = 0;
+ framepos_t end;
+ bool in_silence;
+ boost::shared_ptr<AudioRegion> copy;
- while (s != silence.end()) {
+ if (s->first == 0) {
+ /* initial segment, starting at zero, is silent */
+ end = s->second;
+ in_silence = true;
+ } else {
+ /* initial segment, starting at zero, is audible */
+ end = s->first;
+ in_silence = false;
+ }
- /* trim the end of this region */
- region->trim_end (pos + s->first + _fade_length, 0);
- region->set_fade_out_active (true);
- region->set_fade_out (AudioRegion::Linear, _fade_length);
+ while (s != silence.end()) {
- /* make a new region and trim its start */
- region = boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region));
- region->set_name (session.new_region_name (region->name ()));
- last_region = region;
- assert (region);
- results.push_back (region);
+ framecnt_t interval_duration;
- /* set length here for the same reasons as above */
- region->set_length (region->length() - s->second + _fade_length, 0);
- region->set_start (start + s->second - _fade_length, 0);
- region->set_position (pos + s->second - _fade_length, 0);
- region->set_fade_in_active (true);
- region->set_fade_in (AudioRegion::Linear, _fade_length);
+ interval_duration = end - start;
- s++;
- }
- if (silence.back().second == end) {
- /* the last region we created is zero-sized, so just remove it */
- results.pop_back ();
- } else {
- /* finish off the last region */
- last_region->trim_end (end, 0);
- }
+ if (!in_silence && interval_duration > 0) {
+
+ plist.clear ();
+ plist.add (Properties::length, interval_duration);
+ plist.add (Properties::position, region->position() + start);
+
+ copy = boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create
+ (region, start, plist));
+
+ copy->set_name (RegionFactory::new_region_name (region->name ()));
+
+ std::cerr << "New silent delineated region called " << copy->name()
+ << " @ " << copy->start() << " length = " << copy->length() << " pos = " <<
+ copy->position() << std::endl;
+
+ copy->set_fade_in_active (true);
+ copy->set_fade_in (AudioRegion::Linear, _fade_length);
+ results.push_back (copy);
+ }
+
+ start = end;
+ ++s;
+ end = s->first;
+ in_silence = !in_silence;
+ }
return 0;
}
projects / ardour.git / blobdiff