1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2010-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2015 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 "pbd/property_list.h"
#include "ardour/strip_silence.h"
#include "ardour/audioregion.h"
#include "ardour/region_factory.h"
#include "ardour/progress.h"
using namespace ARDOUR;
/** Construct a StripSilence filter.
* @param s Session.
* @param sm Silences to remove.
* @param fade_length Length of fade in/out to apply to trimmed regions, in samples.
*/
StripSilence::StripSilence (Session & s, const AudioIntervalMap& sm, samplecnt_t fade_length)
: Filter (s)
, _smap (sm)
, _fade_length (fade_length)
{
}
int
StripSilence::run (boost::shared_ptr<Region> r, Progress* progress)
{
results.clear ();
/* we only operate on AudioRegions, for now, though this could be adapted to MIDI
as well I guess
*/
boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
InterThreadInfo itt;
AudioIntervalMap::const_iterator sm;
if (!region) {
results.push_back (r);
return -1;
}
if ((sm = _smap.find (r)) == _smap.end()) {
results.push_back (r);
return -1;
}
const AudioIntervalResult& silence = sm->second;
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;
}
if (silence.empty()) {
/* no silence in this region */
results.push_back (region);
return 0;
}
/* Turn the silence list into an `audible' list */
AudioIntervalResult audible;
/* Add the possible audible section at the start of the region */
AudioIntervalResult::const_iterator first_silence = silence.begin ();
if (first_silence->first != region->start()) {
audible.push_back (std::make_pair (r->start(), first_silence->first));
}
/* Add audible sections in the middle of the region */
for (AudioIntervalResult::const_iterator i = silence.begin (); i != silence.end(); ++i) {
AudioIntervalResult::const_iterator j = i;
++j;
if (j != silence.end ()) {
audible.push_back (std::make_pair (i->second, j->first));
}
}
/* Add the possible audible section at the end of the region */
AudioIntervalResult::const_iterator last_silence = silence.end ();
--last_silence;
sampleoffset_t const end_of_region = r->start() + r->length();
if (last_silence->second < end_of_region - 1) {
audible.push_back (std::make_pair (last_silence->second, end_of_region - 1));
}
int n = 0;
int const N = audible.size ();
for (AudioIntervalResult::const_iterator i = audible.begin(); i != audible.end(); ++i, ++n) {
PBD::PropertyList plist;
boost::shared_ptr<AudioRegion> copy;
plist.add (Properties::length, i->second - i->first);
plist.add (Properties::position, r->position() + (i->first - r->start()));
copy = boost::dynamic_pointer_cast<AudioRegion> (
RegionFactory::create (region, MusicSample (i->first - r->start(), 0), plist)
);
copy->set_name (RegionFactory::new_region_name (region->name ()));
samplecnt_t const f = std::min (_fade_length, (i->second - i->first) / 2);
if (f > 0) {
copy->set_fade_in_active (true);
copy->set_fade_out_active (true);
copy->set_fade_in (FadeLinear, f);
copy->set_fade_out (FadeLinear, f);
} else {
copy->set_fade_in_active (false);
copy->set_fade_out_active (false);
}
results.push_back (copy);
if (progress && (n <= N)) {
progress->set_progress (float (n) / N);
}
}
return 0;
}
|
