root/gs3-extensions/audioDB/trunk/src/perllib/audioDBBuilder.pm @ 24341

Revision 24341, 3.9 KB (checked in by davidb, 9 years ago)

Files to support building an audioDB index that is orthogonol to the usual text-based index

Line 
1###########################################################################
2#
3# audioDBBuilder.pm -- topup builder that gets audioDB initialized correctly
4#
5# A component of the Greenstone digital library software
6# from the New Zealand Digital Library Project at the
7# University of Waikato, New Zealand.
8#
9# Copyright (C) 1999 New Zealand Digital Library Project
10#
11# This program is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2 of the License, or
14# (at your option) any later version.
15#
16# This program is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with this program; if not, write to the Free Software
23# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24#
25###########################################################################
26
27package audioDBBuilder;
28
29use strict;
30no strict 'refs'; # allow filehandles to be variables and viceversa
31
32use extrabuilder;
33
34sub BEGIN {
35    @audioDBBuilder::ISA = ('extrabuilder');
36}
37
38
39sub new {
40    my $class = shift(@_);
41    my $self = new extrabuilder (@_);
42    $self = bless $self, $class;
43
44    $self->{'buildtype'} = "audioDB";
45
46    return $self;
47}
48
49
50sub default_buildproc {
51    my $self  = shift (@_);
52
53    return "audioDBBuildproc";
54}
55
56
57sub build_indexes {
58    my $self = shift (@_);
59    my ($indexname) = @_;
60
61    my $outhandle = $self->{'outhandle'};
62    my $build_dir = $self->{'build_dir'};
63    my $verbosity = $self->{'verbosity'};
64
65    print $outhandle "\n*** audioDB local-sensitivity-hashing (LSH) on chroma features\n"  if ($verbosity >= 1);
66
67    my $audioDB_dir = &util::filename_cat($build_dir, "audioDB");
68
69    if (! -d $audioDB_dir) {
70    &util::mk_all_dir ($audioDB_dir);
71    }
72   
73    my $opt_create_index = ($self->{'incremental'}) ? "" : "-removeold";
74
75
76    if ($opt_create_index) {
77
78    # init an audioDB database
79   
80    my $adb_filename = &util::filename_cat($audioDB_dir,"lsh-features.adb");
81
82    print $outhandle "\n    creating audioDB database\n"  if ($verbosity >= 1);
83
84    my $init_cmd = "audioDB -N -d $adb_filename";
85    my $init_status = system($init_cmd);
86    if ($init_status != 0) {
87        print STDERR "Error: failed to initialize the audioDB database\n";
88        print STDERR "         $adb_filename\n";
89        print STDERR "       $!\n";
90        if ($verbosity>=2) {
91        print STDERR "       cmd: $init_cmd\n";
92        }
93        return;
94    }
95
96    # Turn on L2-norming (Lebesgue space??)
97    # => -L = "unit norm vectors and norm all future inserts"
98
99    my $l2norm_cmd = "audioDB -L -d $adb_filename";
100    my $l2norm_status = system($l2norm_cmd);
101    if ($l2norm_status != 0) {
102        print STDERR "Error: failed to activate L2NORM tha audioDB database $\n";
103        print STDERR "         $adb_filename\n";
104        print STDERR "       $!\n";
105        if ($verbosity>=2) {
106        print STDERR "       cmd: $l2norm_cmd\n";
107        }
108        return;
109    }
110
111
112    # Turn on power-log flag
113    my $pl_cmd = "audioDB -P -d $adb_filename";
114    my $pl_status = system($pl_cmd);
115    if ($pl_status != 0) {
116        print STDERR "Error: failed to add the power-log flag to audioDB database\n";
117        print STDERR "         $adb_filename\n";
118        print STDERR "       $!\n";
119        if ($verbosity>=2) {
120        print STDERR "       cmd: $pl_cmd\n";
121        }
122        return;
123    }
124
125    }
126
127    # Run the docs through the audioDB document processor
128
129    $self->{'buildproc'}->set_mode ('text');
130    $self->{'buildproc'}->reset();
131    &plugin::begin($self->{'pluginfo'}, $self->{'source_dir'},
132           $self->{'buildproc'}, $self->{'maxdocs'});
133    &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'},
134           "", {}, {}, $self->{'buildproc'}, $self->{'maxdocs'}, 0, $self->{'gli'});
135    &plugin::end($self->{'pluginfo'});
136
137
138}
139
1401;
141
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