Inrease the export "chunk size" to speed it up over 10% at least in some situations
[ardour.git] / libs / ardour / analyser.cc
1 /*
2     Copyright (C) 2008 Paul Davis
3
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 */
19
20 #include "ardour/analyser.h"
21 #include "ardour/audiofilesource.h"
22 #include "ardour/session_event.h"
23 #include "ardour/transient_detector.h"
24
25 using namespace std;
26 using namespace ARDOUR;
27 using namespace PBD;
28
29 Analyser* Analyser::the_analyser = 0;
30 Glib::StaticMutex Analyser::analysis_queue_lock = GLIBMM_STATIC_MUTEX_INIT;
31 Glib::Cond* Analyser::SourcesToAnalyse = 0;
32 list<boost::weak_ptr<Source> > Analyser::analysis_queue;
33
34 Analyser::Analyser ()
35 {
36
37 }
38
39 Analyser::~Analyser ()
40 {
41 }
42
43 static void
44 analyser_work ()
45 {
46         Analyser::work ();
47 }
48
49 void
50 Analyser::init ()
51 {
52         SourcesToAnalyse = new Glib::Cond();
53         Glib::Thread::create (sigc::ptr_fun (analyser_work), false);
54 }
55
56 void
57 Analyser::queue_source_for_analysis (boost::shared_ptr<Source> src, bool force)
58 {
59         if (!src->can_be_analysed()) {
60                 return;
61         }
62
63         if (!force && src->has_been_analysed()) {
64                 return;
65         }
66
67         Glib::Mutex::Lock lm (analysis_queue_lock);
68         analysis_queue.push_back (boost::weak_ptr<Source>(src));
69         SourcesToAnalyse->broadcast ();
70 }
71
72 void
73 Analyser::work ()
74 {
75         SessionEvent::create_per_thread_pool ("Analyser", 64);
76
77         while (true) {
78                 analysis_queue_lock.lock ();
79
80           wait:
81                 if (analysis_queue.empty()) {
82                         SourcesToAnalyse->wait (analysis_queue_lock);
83                 }
84
85                 if (analysis_queue.empty()) {
86                         goto wait;
87                 }
88
89                 boost::shared_ptr<Source> src (analysis_queue.front().lock());
90                 analysis_queue.pop_front();
91                 analysis_queue_lock.unlock ();
92
93                 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
94
95                 if (afs && afs->length(afs->timeline_position())) {
96                         analyse_audio_file_source (afs);
97                 }
98         }
99 }
100
101 void
102 Analyser::analyse_audio_file_source (boost::shared_ptr<AudioFileSource> src)
103 {
104         AnalysisFeatureList results;
105
106         TransientDetector td (src->sample_rate());
107
108         if (td.run (src->get_transients_path(), src.get(), 0, results) == 0) {
109                 src->set_been_analysed (true);
110         } else {
111                 src->set_been_analysed (false);
112         }
113
114 }
115