root/gs3-extensions/audioDB/trunk/src/perllib/plugins/FFTExtractor.pm @ 26275

Revision 26275, 5.5 KB (checked in by davidb, 7 years ago)

Some minor tweaks to allow the plugin to be used under Cygwin

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    my $native_source_file_path = $source_file_path;
97
98    my $native_target_file_path = $target_file_path;
99    if ($^O eq "cygwin") {
100    # Only get ffmpeg as native Windows binary => need to use Windows style path
101    $native_source_file_path=`cygpath -w \"$source_file_path\"`;
102    $native_target_file_path=`cygpath -w \"$target_file_path\"`;
103    $native_source_file_path =~ s/\s+$//;
104    $native_target_file_path =~ s/\s+$//;
105    }
106
107    # Setup and run the ffmpeg command
108    my $ffmpeg_cmd = "ffmpeg -y $convert_options";
109    $ffmpeg_cmd .= " -i \"$native_source_file_path\"";
110    $ffmpeg_cmd .= " \"$native_target_file_path\"";
111       
112##    print STDERR "****** cmd = $ffmpeg_cmd\n";
113
114    my $print_info = { 'message_prefix' => "ffmpeg",
115               'message' => "Converting $source_file_no_path to $target_ext format" };
116   
117    my ($regenerated,$result,$had_error)
118    = $self->autorun_general_cmd($ffmpeg_cmd,$source_file_path,
119                     $target_file_path,$print_info);
120   
121    return $target_file_path;
122}
123
124
125
126sub compute_fft_features
127{
128    my $self = shift(@_);
129    my $source_file_path = shift(@_);
130    my $target_feature   = shift(@_);
131    my $convert_options  = shift(@_) || "";
132
133    my $outhandle = $self->{'outhandle'};
134    my $verbosity = $self->{'verbosity'};
135
136##    print STDERR "**** wav filename = $source_file_path\n";
137
138    my $source_file_no_path = &File::Basename::basename($source_file_path);
139
140    $self->init_cache_for_file($source_file_path);
141
142    my $target_file_path;
143    my $target_ext;
144
145    if ($target_feature eq "chroma") {
146    $target_ext = "chr12";
147    $convert_options .= " -c 12";
148    }
149    elsif ($target_feature eq "power-log") {
150    $target_ext = "power";
151    $convert_options .= " -P";
152    }
153    else {
154    print STDERR "Warning: computer_fft_features(), unrecognized option '$target_feature'\n";
155    $target_ext = "txt";
156    }
157
158    if ($self->{'enable_cache'}) {
159    my $cached_dir = $self->{'cached_dir'};
160    my $file_root = $self->{'cached_file_root'};
161
162    my $target_file = "$file_root.$target_ext";
163
164    $target_file_path = &util::filename_cat($cached_dir,$target_file);
165    }
166    else {
167    $target_file_path = &util::get_tmp_filename($target_ext);
168    }
169   
170    # Run fftExtract
171    my $fftExtract_cmd = "fftExtract $convert_options";
172    $fftExtract_cmd .= " \"$source_file_path\" \"$target_file_path\"";
173       
174##    $fftExtract_cmd =~ s/\\/\//g;
175
176##    print STDERR "**** cmd = $fftExtract_cmd\n";
177
178    my $print_info = { 'message_prefix' => "fftExtract",
179               'message' => "Extracting $target_feature from $source_file_no_path" };
180   
181    my ($regenerated,$result,$had_error)
182    = $self->autorun_general_cmd($fftExtract_cmd,$source_file_path,$target_file_path,$print_info);
183   
184    return ($target_file_path);
185}
186   
187
188
189
1901; 
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