source: gs3-extensions/audioDB/trunk/src/perllib/plugins/FFTExtractor.pm@ 24338

Last change on this file since 24338 was 24338, checked in by davidb, 9 years ago

Plugins for processing audio files with audioDB/fftExtract and store results as associated files

File size: 5.0 KB
Line 
1###########################################################################
2#
3# FFTExtractor - helper plugin that computers audio features for
4# music information retrieval use,using audioDB
5#
6# A component of the Greenstone digital library software
7# from the New Zealand Digital Library Project at the
8# University of Waikato, New Zealand.
9#
10# Copyright (C) 2010 New Zealand Digital Library Project
11#
12# This program is free software; you can redistribute it and/or modify
13# it under the terms of the GNU General Public License as published by
14# the Free Software Foundation; either version 2 of the License, or
15# (at your option) any later version.
16#
17# This program is distributed in the hope that it will be useful,
18# but WITHOUT ANY WARRANTY; without even the implied warranty of
19# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20# GNU General Public License for more details.
21#
22# You should have received a copy of the GNU General Public License
23# along with this program; if not, write to the Free Software
24# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25#
26###########################################################################
27package FFTExtractor;
28
29use BaseMediaConverter;
30
31use Cwd;
32
33use strict;
34no strict 'refs'; # allow filehandles to be variables and viceversa
35
36
37BEGIN {
38 @FFTExtractor::ISA = ('BaseMediaConverter');
39}
40
41
42my $arguments = [
43 ];
44
45
46
47my $options = { 'name' => "FFTExtractor",
48 'desc' => "{FFTExtractor.desc}",
49 'abstract' => "yes",
50 'inherits' => "yes",
51 'args' => $arguments };
52
53sub new {
54 my ($class) = shift (@_);
55 my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
56 push(@$pluginlist, $class);
57
58 push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
59 push(@{$hashArgOptLists->{"OptList"}},$options);
60
61 my $self = new BaseMediaConverter($pluginlist, $inputargs, $hashArgOptLists, 1);
62
63 return bless $self, $class;
64}
65
66
67sub convert_audio_format
68{
69 my $self = shift(@_);
70 my $source_file_path = shift(@_);
71 my $target_ext = shift(@_);
72 my $convert_options = shift(@_) || "";
73
74 my $outhandle = $self->{'outhandle'};
75 my $verbosity = $self->{'verbosity'};
76
77 my $source_file_no_path = &File::Basename::basename($source_file_path);
78
79 $self->init_cache_for_file($source_file_path);
80
81 # Determine the full name and path of the output file
82 my $target_file_path;
83
84 if ($self->{'enable_cache'}) {
85 my $cached_dir = $self->{'cached_dir'};
86 my $file_root = $self->{'cached_file_root'};
87
88 my $target_file = "$file_root.$target_ext";
89
90 $target_file_path = &util::filename_cat($cached_dir,$target_file);
91 }
92 else {
93 $target_file_path = &util::get_tmp_filename($target_ext);
94 }
95
96 # Setup and run the ffmpeg command
97 my $ffmpeg_cmd = "ffmpeg $convert_options";
98 $ffmpeg_cmd .= " -i \"$source_file_path\"";
99 $ffmpeg_cmd .= " \"$target_file_path\"";
100
101## print STDERR "****** cmd = $ffmpeg_cmd\n";
102
103 my $print_info = { 'message_prefix' => "ffmpeg",
104 'message' => "Converting $source_file_no_path to $target_ext format" };
105
106 my ($regenerated,$result,$had_error)
107 = $self->autorun_general_cmd($ffmpeg_cmd,$source_file_path,
108 $target_file_path,$print_info);
109
110 return $target_file_path;
111}
112
113
114
115sub compute_fft_features
116{
117 my $self = shift(@_);
118 my $source_file_path = shift(@_);
119 my $target_feature = shift(@_);
120 my $convert_options = shift(@_) || "";
121
122 my $outhandle = $self->{'outhandle'};
123 my $verbosity = $self->{'verbosity'};
124
125## print STDERR "**** wav filename = $source_file_path\n";
126
127 my $source_file_no_path = &File::Basename::basename($source_file_path);
128
129 $self->init_cache_for_file($source_file_path);
130
131 my $target_file_path;
132 my $target_ext;
133
134 if ($target_feature eq "chroma") {
135 $target_ext = "chr12";
136 $convert_options .= " -c 12";
137 }
138 elsif ($target_feature eq "power-log") {
139 $target_ext = "power";
140 $convert_options .= " -P";
141 }
142 else {
143 print STDERR "Warning: computer_fft_features(), unrecognized option '$target_feature'\n";
144 $target_ext = "txt";
145 }
146
147 if ($self->{'enable_cache'}) {
148 my $cached_dir = $self->{'cached_dir'};
149 my $file_root = $self->{'cached_file_root'};
150
151 my $target_file = "$file_root.$target_ext";
152
153 $target_file_path = &util::filename_cat($cached_dir,$target_file);
154 }
155 else {
156 $target_file_path = &util::get_tmp_filename($target_ext);
157 }
158
159 # Run fftExtract
160 my $fftExtract_cmd = "fftExtract $convert_options";
161 $fftExtract_cmd .= " \"$source_file_path\" \"$target_file_path\"";
162
163## print STDERR "**** cmd = $fftExtract_cmd\n";
164
165 my $print_info = { 'message_prefix' => "fftExtract",
166 'message' => "Extracting $target_feature from $source_file_no_path" };
167
168 my ($regenerated,$result,$had_error)
169 = $self->autorun_general_cmd($fftExtract_cmd,$source_file_path,$target_file_path,$print_info);
170
171 return ($target_file_path);
172}
173
174
175
176
1771;
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