[24338] | 1 | ###########################################################################
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| 2 | #
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| 3 | # AudioDBPlugin.pm -- for extracting Chroma and Power Log features to work
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| 4 | # with Queen Marys audioDB
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| 5 | #
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| 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 2011 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 |
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| 28 | package AudioDBPlugin;
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| 29 |
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| 30 | use BasePlugin;
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| 31 | use FFTExtractor;
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| 32 |
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| 33 | use strict;
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| 34 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 35 | no strict 'subs';
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| 36 |
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| 37 | use gsprintf 'gsprintf';
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| 38 |
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| 39 | sub BEGIN {
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| 40 | @AudioDBPlugin::ISA = ('BasePlugin', 'FFTExtractor');
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| 41 | }
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| 42 |
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| 43 | my $enable_streaming_list =
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| 44 | [{'name' => "disabled", 'desc' => "Do not create any video file optimised for streaming over the Internet."},
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| 45 | {'name' => "flv", 'desc' => "Uses the FLV format for streaming media. Better to target old computers."},
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| 46 | {'name' => "mp4", 'desc' => "Uses the MP4 container with H264 and AAC codecs. Better quality at very low bitrates but more ressources intensive."},
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| 47 | {'name' => "mp3", 'desc' => "(audio only) Uses MP3 for psuedo streaming."}
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| 48 | ];
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| 49 |
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| 50 | my $streaming_mime_types = { "flv" => "video/flv",
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| 51 | "mp4" => "video/mp4",
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| 52 | "mp3" => "audio/mpeg" };
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| 53 |
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| 54 | my $arguments =
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| 55 | [
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| 56 | { 'name' => "compute_fft_features",
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| 57 | 'desc' => "{FFTExtractor.compute_fft_features}",
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| 58 | 'type' => "enum",
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| 59 | 'list' => [{'name' => "true", 'desc' => "{common.true}"},
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| 60 | {'name' => "false", 'desc' => "{common.false}"}],
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| 61 | 'deft' => "false",
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| 62 | 'reqd' => "no" },
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| 63 | { 'name' => "process_exp",
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| 64 | 'desc' => "{BasePlugin.process_exp}",
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| 65 | 'type' => "regexp",
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| 66 | 'deft' => &get_default_process_exp(),
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| 67 | 'reqd' => "no" },
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| 68 |
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| 69 | { 'name' => "enable_streaming",
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| 70 | 'desc' => "{MultimediaPlug.enable_streaming}",
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| 71 | 'type' => "enum",
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| 72 | 'list' => $enable_streaming_list,
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| 73 | 'deft' => "disabled",
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| 74 | 'reqd' => "no" }
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| 75 | ];
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| 76 |
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| 77 | my $options = { 'name' => "AudioDBPlugin",
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| 78 | 'desc' => "{AudioDBPlugin.desc}",
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| 79 | 'abstract' => "no",
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| 80 | 'inherits' => "yes",
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| 81 | 'args' => $arguments };
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| 82 |
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| 83 |
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| 84 |
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| 85 | sub new {
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| 86 | my ($class) = shift (@_);
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| 87 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 88 | push(@$pluginlist, $class);
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| 89 |
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| 90 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 91 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 92 |
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| 93 |
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| 94 | my $ffte_self = new FFTExtractor($pluginlist, $inputargs, $hashArgOptLists,1);
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| 95 | my $base_self = new BasePlugin($pluginlist, $inputargs, $hashArgOptLists);
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| 96 |
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| 97 | my $self = BasePlugin::merge_inheritance($ffte_self,$base_self);
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| 98 |
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| 99 | return bless $self, $class;
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| 100 | }
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| 101 |
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| 102 | sub get_default_process_exp {
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| 103 | my $self = shift (@_);
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| 104 |
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| 105 | return q^(?i)(\.mp3|\.wave?|\.aif[fc]?|\.au|\.snd|\.og[ga])$^;
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| 106 | }
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| 107 |
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| 108 | sub begin {
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| 109 | my $self = shift (@_);
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| 110 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 111 |
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| 112 | $self->SUPER::begin(@_);
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| 113 | $self->FFTExtractor::begin(@_);
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| 114 | }
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| 115 |
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| 116 |
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| 117 |
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| 118 | # do plugin specific processing of doc_obj
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| 119 | sub process {
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| 120 | my $self = shift (@_);
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| 121 | my ($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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| 122 |
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| 123 | my $outhandle = $self->{'outhandle'};
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| 124 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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| 125 |
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| 126 | my $top_section = $doc_obj->get_top_section();
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| 127 |
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| 128 | # associate original file
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| 129 | # if filename ext not .wav convert (optionally cached) to wav
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| 130 |
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| 131 | my $wav_filename;
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| 132 |
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| 133 | my ($input_ext) = ($filename_full_path =~ m/\.(.*?)$/);
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| 134 | $input_ext = lc($input_ext);
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| 135 |
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| 136 |
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| 137 | if ($input_ext ne "wav") {
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| 138 | $wav_filename = $self->convert_audio_format($filename_full_path,"wav");
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| 139 | }
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| 140 | else {
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| 141 | $wav_filename = $filename_full_path;
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| 142 | }
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| 143 | $doc_obj->associate_file($wav_filename, "audio.wav", "audio/wav", $top_section);
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| 144 |
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| 145 | if ($self->{'enable_streaming'} ne "disabled") {
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| 146 |
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| 147 | my $streamable_ext = lc($self->{'enable_streaming'});
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| 148 |
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| 149 | if ($input_ext ne $streamable_ext) {
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| 150 | # make streamable version
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| 151 | my $streamable_filename
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| 152 | = $self->convert_audio_format($filename_full_path,$streamable_ext);
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| 153 |
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| 154 | $doc_obj->associate_file($streamable_filename,
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| 155 | "streamable.$streamable_ext",
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| 156 | $streaming_mime_types->{$streamable_ext},
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| 157 | $top_section);
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| 158 | }
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| 159 | }
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| 160 |
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| 161 | #
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| 162 | # Opportunity here to segment, use beat-tracking ...
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| 163 | #
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| 164 |
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| 165 | if ($self->{'compute_fft_features'} eq "true")
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| 166 | {
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| 167 | # compute chroma 12 and associate file
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| 168 | my $chr12_filename = $self->compute_fft_features($wav_filename,"chroma");
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| 169 | $doc_obj->associate_file($chr12_filename, "doc.chr12",
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| 170 | "text/plain", $top_section);
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| 171 |
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| 172 | # compute power log and associate file
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| 173 | my $powerlog_filename = $self->compute_fft_features($wav_filename,"power-log");
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| 174 | $doc_obj->associate_file($powerlog_filename, "doc.power",
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| 175 | "text/plain", $top_section);
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| 176 | }
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| 177 |
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| 178 | #we have no text - adds dummy text and NoText metadata
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| 179 | $self->add_dummy_text($doc_obj, $doc_obj->get_top_section());
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| 180 |
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| 181 | return 1;
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| 182 | }
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| 183 |
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| 184 |
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| 185 |
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| 186 | 1;
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| 187 |
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| 188 |
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| 189 |
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