rollback to 3428, before the mysterious removal of libs/* at 3431/3432
[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/transient_detector.h>
23
24 #include <pbd/pthread_utils.h>
25 #include <pbd/convert.h>
26
27 using namespace std;
28 using namespace sigc;
29 using namespace ARDOUR;
30 using namespace PBD;
31
32 Analyser* Analyser::the_analyser = 0;
33 Glib::StaticMutex Analyser::analysis_queue_lock = GLIBMM_STATIC_MUTEX_INIT;
34 Glib::Cond* Analyser::SourcesToAnalyse = 0;
35 list<boost::weak_ptr<Source> > Analyser::analysis_queue;
36
37 Analyser::Analyser ()
38 {
39         
40 }
41
42 Analyser::~Analyser ()
43 {
44 }
45
46 static void
47 analyser_work ()
48 {
49         Analyser::work ();
50 }
51
52 void
53 Analyser::init ()
54 {
55         SourcesToAnalyse = new Glib::Cond();
56         Glib::Thread::create (sigc::ptr_fun (analyser_work), false);
57 }
58
59 void
60 Analyser::queue_source_for_analysis (boost::shared_ptr<Source> src, bool force)
61 {
62         if (!src->can_be_analysed()) {
63                 return;
64         }
65
66         if (!force && src->has_been_analysed()) {
67                 return;
68         }
69
70         Glib::Mutex::Lock lm (analysis_queue_lock);
71         analysis_queue.push_back (boost::weak_ptr<Source>(src));
72         SourcesToAnalyse->broadcast ();
73 }
74
75 void
76 Analyser::work ()
77 {
78         PBD::ThreadCreated (pthread_self(), string ("analyser-") + to_string (pthread_self(), std::dec));
79
80         while (true) {
81                 analysis_queue_lock.lock ();
82
83           wait:
84                 if (analysis_queue.empty()) {
85                         SourcesToAnalyse->wait (analysis_queue_lock);
86                 }
87
88                 if (analysis_queue.empty()) {
89                         goto wait;
90                 }
91
92                 boost::shared_ptr<Source> src (analysis_queue.front().lock());
93                 analysis_queue.pop_front();
94                 analysis_queue_lock.unlock ();
95
96                 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
97
98                 if (afs && afs->length()) {
99                         analyse_audio_file_source (afs);
100                 }
101         }
102 }
103
104 void
105 Analyser::analyse_audio_file_source (boost::shared_ptr<AudioFileSource> src)
106 {
107         AnalysisFeatureList results;
108
109         TransientDetector td (src->sample_rate());
110
111         if (td.run (src->get_transients_path(), src.get(), 0, results) == 0) {
112                 src->set_been_analysed (true);
113         } else {
114                 src->set_been_analysed (false);
115         }
116
117 }
118
119