145 lines
4.4 KiB
C++
145 lines
4.4 KiB
C++
/*
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* Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
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* Copyright (C) 2010-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "pbd/progress.h"
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#include "pbd/property_list.h"
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#include "ardour/strip_silence.h"
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#include "ardour/audioregion.h"
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#include "ardour/region_factory.h"
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using namespace ARDOUR;
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/** Construct a StripSilence filter.
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* @param s Session.
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* @param sm Silences to remove.
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* @param fade_length Length of fade in/out to apply to trimmed regions, in samples.
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*/
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StripSilence::StripSilence (Session & s, const AudioIntervalMap& sm, samplecnt_t fade_length)
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: Filter (s)
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, _smap (sm)
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, _fade_length (fade_length)
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{
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}
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int
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StripSilence::run (std::shared_ptr<Region> r, PBD::Progress* progress)
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{
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results.clear ();
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/* we only operate on AudioRegions, for now, though this could be adapted to MIDI
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as well I guess
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*/
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std::shared_ptr<AudioRegion> region = std::dynamic_pointer_cast<AudioRegion> (r);
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InterThreadInfo itt;
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AudioIntervalMap::const_iterator sm;
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if (!region) {
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results.push_back (r);
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return -1;
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}
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if ((sm = _smap.find (r)) == _smap.end()) {
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results.push_back (r);
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return -1;
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}
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const AudioIntervalResult& silence = sm->second;
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if (silence.size () == 1 && silence.front().first == 0 && silence.front().second == region->length_samples() - 1) {
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/* the region is all silence, so just return with nothing */
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return 0;
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}
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if (silence.empty()) {
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/* no silence in this region */
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results.push_back (region);
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return 0;
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}
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/* Turn the silence list into an `audible' list */
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AudioIntervalResult audible;
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/* Add the possible audible section at the start of the region */
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AudioIntervalResult::const_iterator first_silence = silence.begin ();
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if (first_silence->first != region->start_sample()) {
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audible.push_back (std::make_pair (r->start_sample(), first_silence->first));
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}
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/* Add audible sections in the middle of the region */
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for (AudioIntervalResult::const_iterator i = silence.begin (); i != silence.end(); ++i) {
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AudioIntervalResult::const_iterator j = i;
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++j;
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if (j != silence.end ()) {
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audible.push_back (std::make_pair (i->second, j->first));
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}
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}
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/* Add the possible audible section at the end of the region */
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AudioIntervalResult::const_iterator last_silence = silence.end ();
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--last_silence;
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sampleoffset_t const end_of_region = r->start_sample() + r->length_samples();
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if (last_silence->second < end_of_region - 1) {
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audible.push_back (std::make_pair (last_silence->second, end_of_region - 1));
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}
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int n = 0;
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int const N = audible.size ();
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for (AudioIntervalResult::const_iterator i = audible.begin(); i != audible.end(); ++i, ++n) {
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PBD::PropertyList plist;
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std::shared_ptr<AudioRegion> copy;
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plist.add (Properties::length, timecnt_t (i->second - i->first, timepos_t (r->position_sample() + (i->first - r->start_sample()))));
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copy = std::dynamic_pointer_cast<AudioRegion> (
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RegionFactory::create (region, timecnt_t (i->first - r->start_sample(), timepos_t::zero (false)), plist)
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);
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copy->set_name (RegionFactory::new_region_name (region->name ()));
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samplecnt_t const f = std::min (_fade_length, (i->second - i->first) / 2);
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if (f > 0) {
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copy->set_fade_in_active (true);
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copy->set_fade_out_active (true);
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copy->set_fade_in (FadeLinear, f);
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copy->set_fade_out (FadeLinear, f);
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} else {
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copy->set_fade_in_active (false);
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copy->set_fade_out_active (false);
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}
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results.push_back (copy);
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if (progress && (n <= N)) {
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progress->set_progress (float (n) / N);
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}
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}
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return 0;
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}
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