1 | ###########################################################################
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2 | #
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3 | # MP3Plug.pm -- Plugin for MP3 files (MPEG audio layer 3).
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4 | #
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5 | # A component of the Greenstone digital library software from the New
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6 | # Zealand Digital Library Project at the University of Waikato, New
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7 | # Zealand.
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8 | #
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9 | # Copyright (C) 2001 New Zealand Digital Library Project
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10 | #
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11 | # This program is free software; you can redistribute it and/or modify
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12 | # it under the terms of the GNU General Public License as published by
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13 | # the Free Software Foundation; either version 2 of the License, or
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14 | # (at your option) any later version.
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15 | #
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16 | # This program is distributed in the hope that it will be useful, but
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17 | # WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 | # General Public License for more details.
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20 | #
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21 | # You should have received a copy of the GNU General Public License
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22 | # along with this program; if not, write to the Free Software
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23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | #
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25 | ###########################################################################
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26 |
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27 |
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28 | package MP3Plug;
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29 |
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30 | use UnknownPlug;
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31 | use parsargv;
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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 |
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36 | use MP3::Info;
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37 |
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38 | require giget;
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39 |
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40 | sub BEGIN {
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41 | @MP3Plug::ISA = ('UnknownPlug');
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42 | }
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43 |
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44 | my $arguments =
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45 | [ { 'name' => "process_exp",
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46 | 'desc' => "{BasPlug.process_exp}",
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47 | 'type' => "string",
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48 | 'deft' => &get_default_process_exp(),
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49 | 'reqd' => "no" },
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50 | { 'name' => "assoc_images",
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51 | 'desc' => "{MP3Plug.assoc_images}",
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52 | 'type' => "flag",
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53 | 'deft' => "",
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54 | 'reqd' => "no" },
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55 | { 'name' => "applet_metadata",
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56 | 'desc' => "{MP3Plug.applet_metadata}",
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57 | 'type' => "flag",
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58 | 'deft' => "" },
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59 | { 'name' => "metadata_fields",
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60 | 'desc' => "{MP3Plug.metadata_fields}",
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61 | 'type' => "string",
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62 | 'deft' => "Title,Artist,Genre" } ];
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63 |
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64 | my $options = { 'name' => "MP3Plug",
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65 | 'desc' => "{MP3Plug.desc}",
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66 | 'abstract' => "no",
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67 | 'inherits' => "yes",
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68 | 'args' => $arguments };
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69 |
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70 | sub new {
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71 | my ($class) = shift (@_);
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72 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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73 | push(@$pluginlist, $class);
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74 |
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75 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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76 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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77 |
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78 | my $self = (defined $hashArgOptLists)? new UnknownPlug($pluginlist,$inputargs,$hashArgOptLists): new UnknownPlug($pluginlist,$inputargs);
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79 |
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80 | return bless $self, $class;
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81 | }
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82 |
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83 | sub get_default_process_exp {
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84 | return q^(?i)\.mp3$^;
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85 | }
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86 |
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87 | sub gen_mp3applet {
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88 |
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89 | my ($mp3_filename) = @_;
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90 |
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91 | my $applet_html = '
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92 | <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
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93 | WIDTH = "59"
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94 | HEIGHT = "32"
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95 | codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
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96 | <PARAM NAME = CODE VALUE = "javazoom.jlGui.TinyPlayer" >
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97 | <PARAM NAME = ARCHIVE VALUE = "_httpcollection_/tinyplayer.jar,_httpcollection_/jl10.jar" >
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98 | <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
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99 | <PARAM NAME="scriptable" VALUE="false">
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100 | <PARAM NAME = "skin" VALUE ="_httpcollection_/skins/Digitalized">
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101 | <PARAM NAME = "autoplay" VALUE ="yes">
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102 | <PARAM NAME = "bgcolor" VALUE ="638182">
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103 | <PARAM NAME = "audioURL" VALUE ="MP3FILENAME">
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104 | <COMMENT>
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105 | <EMBED type="application/x-java-applet;version=1.3"
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106 | CODE = "javazoom.jlGui.TinyPlayer"
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107 | ARCHIVE = "_httpcollection_/tinyplayer.jar,_httpcollection_/jl10.jar"
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108 | WIDTH = "59"
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109 | HEIGHT = "32"
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110 | skin = "_httpcollection_/skins/Digitalized"
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111 | autoplay = "yes"
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112 | bgcolor = "638182"
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113 | audioURL = "MP3FILENAME"
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114 | scriptable=false
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115 | pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html">
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116 | <NOEMBED>
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117 | </COMMENT>
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118 | </NOEMBED></EMBED>
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119 | </OBJECT>
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120 | ';
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121 |
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122 | $applet_html =~ s/MP3FILENAME/$mp3_filename/g;
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123 |
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124 | return $applet_html;
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125 | }
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126 |
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127 |
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128 |
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129 | # Associate the mp3 file with the new document
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130 |
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131 | sub associate_mp3_file {
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132 | my $self = shift (@_);
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133 | my $filename = shift (@_); # filename with full path
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134 | my $file = shift (@_); # filename without path
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135 | my $doc_obj = shift (@_);
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136 |
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137 | my $verbosity = $self->{'verbosity'};
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138 | my $outhandle = $self->{'outhandle'};
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139 |
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140 | # check the filename is okay
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141 | return 0 if ($file eq "" || $filename eq "");
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142 |
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143 | # Add the file metadata
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144 | my $assoc_url = $file;
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145 | # $assoc_url =~ s/ /%20/g; # probably need to do more escaping than this!!
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146 | $assoc_url =~ s/ /_/g; # workaround for now
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147 | my $dst_file = $file;
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148 | $dst_file =~ s/ /_/g;
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149 |
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150 | # Add the file as an associated file ...
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151 | my $section = $doc_obj->get_top_section();
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152 | my $mime_type = $self->{'mime_type'} || "audio/mp3";
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153 | my $assoc_field = $self->{'assoc_field'} || "mp3";
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154 | my $assoc_name = $file;
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155 | $assoc_name =~ s/\.mp3$//;
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156 |
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157 | $doc_obj->associate_file($filename, $dst_file, $mime_type, $section);
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158 | $doc_obj->add_metadata ($section, "Source", $file);
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159 | $doc_obj->add_metadata ($section, $assoc_field, $assoc_name);
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160 | $doc_obj->add_metadata ($section, "srcurl", $assoc_url);
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161 |
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162 | my $mp3_info = get_mp3info($filename);
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163 | my $mp3_tags = get_mp3tag($filename);
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164 |
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165 | my $metadata_fields = $self->{'metadata_fields'};
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166 |
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167 | if ($metadata_fields eq "*") {
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168 | # Locate all info and tag metadata
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169 |
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170 | foreach my $ki ( keys %$mp3_info ) {
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171 | my $mp3_metavalue = $mp3_info->{$ki};
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172 |
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173 | if ($mp3_metavalue !~ m/^\s*$/s) {
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174 | my $mp3_metaname = "mp3:".lc($ki);
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175 | $doc_obj->add_metadata ($section, $mp3_metaname, $mp3_metavalue);
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176 | }
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177 | }
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178 |
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179 | foreach my $kt ( keys %$mp3_tags ) {
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180 | my $mp3_metavalue = $mp3_tags->{$kt};
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181 |
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182 | if ($mp3_metavalue !~ m/^\s*$/s) {
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183 | my $kt_len = length($kt);
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184 | my $kt_initial_cap = uc(substr($kt,0,1)).lc(substr($kt,1,$kt_len-1));
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185 | my $mp3_metaname = "mp3:".$kt_initial_cap;
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186 |
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187 | $doc_obj->add_metadata ($section, $mp3_metaname, $mp3_metavalue);
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188 | }
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189 | }
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190 | }
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191 | else {
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192 |
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193 | # Restrict metadata to that specifically given
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194 | foreach my $field (split /,/, $metadata_fields) {
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195 |
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196 | # check info
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197 | if (defined $mp3_info->{$field}) {
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198 |
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199 | my $mp3i_metavalue = $mp3_info->{$field};
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200 |
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201 | if ($mp3i_metavalue !~ m/^\s*$/s) {
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202 | my $mp3i_metaname = "mp3:".lc($field);
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203 | $doc_obj->add_metadata ($section, $mp3i_metaname, $mp3i_metavalue);
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204 | }
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205 | }
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206 |
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207 | # check tags
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208 | if (defined $mp3_tags->{uc($field)}) {
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209 |
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210 | my $mp3t_metavalue = $mp3_tags->{uc($field)};
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211 |
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212 | if ($mp3t_metavalue !~ m/^\s*$/s) {
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213 | my $mp3t_metaname = "mp3:".$field;
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214 |
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215 | $doc_obj->add_metadata ($section, $mp3t_metaname, $mp3t_metavalue);
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216 | }
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217 | }
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218 |
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219 | }
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220 | }
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221 |
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222 | $doc_obj->add_metadata ($section, "FileFormat", "MP3");
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223 |
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224 | $doc_obj->add_metadata ($section, "srclink",
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225 | "<a href=\"_httpcollection_/index/assoc/[assocfilepath]/[srcurl]\">");
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226 | $doc_obj->add_metadata ($section, "srcicon", "<img src=\"_httpimg_/mp3icon.gif\">");
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227 | $doc_obj->add_metadata ($section, "/srclink", "</a>");
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228 |
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229 | my $applet_metadata = $self->{'applet_metadata'};
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230 | if (defined $applet_metadata && $applet_metadata ) {
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231 | my $applet_html
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232 | = gen_mp3applet("_httpcollection_/index/assoc/[assocfilepath]/[srcurl]");
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233 | $doc_obj->add_metadata ($section, "mp3applet", $applet_html);
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234 | }
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235 |
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236 | my $assoc_images = $self->{'assoc_images'};
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237 | if (defined $assoc_images && $assoc_images) {
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238 | my @search_terms = ();
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239 |
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240 | my $title = $mp3_tags->{'TITLE'};
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241 | my $artist = $mp3_tags->{'ARTIST'};
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242 |
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243 | if (defined $title && $title ne "") {
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244 |
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245 | push(@search_terms,$title);
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246 |
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247 | if (defined $artist && $artist ne "") {
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248 | push(@search_terms,$artist);
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249 | }
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250 | }
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251 | else {
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252 | push(@search_terms,$assoc_name);
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253 | }
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254 |
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255 | push(@search_terms,"song");
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256 |
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257 | my $output_dir = $filename;
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258 | $output_dir =~ s/\.\w+$//;
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259 |
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260 | my ($imgref_urls) = giget(\@search_terms,$output_dir);
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261 |
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262 | my $gi_base = gi_url_base();
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263 | my $gi_query_url = gi_query_url(\@search_terms);
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264 |
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265 | $doc_obj->add_metadata ($section, "giquery", "<a href=\"$gi_base$gi_query_url\" target=giwindow>");
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266 | $doc_obj->add_metadata ($section, "/giquery", "</a>");
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267 |
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268 | for (my $i=1; $i<=2; $i++) {
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269 | my $img_filename = "$output_dir/img_$i.jpg";
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270 | my $dst_file = "img_$i.jpg";
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271 |
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272 | if (-e $img_filename) {
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273 | $doc_obj->associate_file($img_filename, $dst_file, "image/jpeg", $section);
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274 |
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275 | my $srcurl = "src=\"_httpcollection_/index/assoc/[assocfilepath]/$dst_file\"";
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276 |
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277 | $doc_obj->add_metadata ($section, "img$i",
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278 | "<img $srcurl>");
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279 | $doc_obj->add_metadata ($section, "smallimg$i",
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280 | "<img $srcurl width=100>");
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281 |
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282 | my $imgref_url = $imgref_urls->[$i-1];
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283 |
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284 | $doc_obj->add_metadata ($section, "imgref$i", "<a href=\"$imgref_url\" target=giwindow>");
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285 | $doc_obj->add_metadata ($section, "/imgref$i", "</a>");
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286 | }
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287 |
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288 | }
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289 |
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290 |
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291 | }
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292 |
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293 | return 1;
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294 | }
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295 |
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296 |
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297 |
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298 | # The MP3Plug read() function is based on UnknownPlug read(). This
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299 | # function does all the right things to make general options work for
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300 | # a given plugin.
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301 |
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302 | my $mp3_doc_count = 0; ## is this used anywhere now !!???
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303 |
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304 | sub read {
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305 | my $self = shift (@_);
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306 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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307 |
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308 | my $outhandle = $self->{'outhandle'};
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309 |
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310 | # Make sure we're processing the correct file
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311 | my $filename = &util::filename_cat($base_dir, $file);
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312 | return 0 if $self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/;
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313 | if ($filename !~ /$self->{'process_exp'}/ || !-f $filename) {
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314 | return undef;
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315 | }
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316 | print STDERR "<Processing n='$file' p='MP3Plug'>\n" if ($gli);
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317 | print $outhandle "MP3Plug processing \"$filename\"\n"
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318 | if $self->{'verbosity'} > 1;
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319 |
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320 | #if there's a leading directory name, eat it...
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321 | $file =~ s/^.*[\/\\]//;
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322 |
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323 | # create a new document
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324 | my $doc_obj = new doc ($filename, "indexed_doc");
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325 | $mp3_doc_count++;
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326 |
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327 | ## $doc_obj->set_OIDtype ($processor->{'OIDtype'});
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328 | $doc_obj->set_OIDtype ("incremental"); # this is done to avoid hashing content of file
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329 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
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330 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "FileSize", (-s $filename));
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331 |
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332 | # associate the file with the document
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333 | if (associate_mp3_file($self, $filename, $file, $doc_obj) != 1)
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334 | {
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335 | print "MP3Plug: couldn't process \"$filename\"\n";
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336 | return 0;
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337 | }
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338 |
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339 | #create an empty text string so we don't break downstream plugins
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340 | my $text = &gsprintf::lookup_string("{BasPlug.dummy_text}");
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341 | $text .= "[img1]<br>";
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342 | $text .= "[img2]<br>";
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343 |
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344 | # include any metadata passed in from previous plugins
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345 | my $section = $doc_obj->get_top_section();
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346 | $self->extra_metadata ($doc_obj, $section, $metadata);
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347 |
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348 | $self->title_fallback($doc_obj,$section,$file);
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349 |
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350 | # do plugin specific processing of doc_obj
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351 | return undef unless defined ($self->process (\$text, $pluginfo, $base_dir,
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352 | $file, $metadata, $doc_obj));
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353 |
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354 | # do any automatic metadata extraction
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355 | $self->auto_extract_metadata ($doc_obj);
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356 |
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357 | # add an OID
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358 | $doc_obj->set_OID();
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359 | $doc_obj->add_text($section, $text);
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360 |
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361 | # process the document
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362 | $processor->process($doc_obj);
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363 |
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364 | $self->{'num_processed'} ++;
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365 | return 1;
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366 | }
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367 |
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368 |
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369 | sub title_fallback
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370 | {
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371 | my $self = shift (@_);
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372 | my ($doc_obj,$section,$file) = @_;
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373 |
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374 | if (!defined $doc_obj->get_metadata_element ($section, "Title")) {
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375 | my $mp3_title = $doc_obj->get_metadata_element ($section, "mp3:Title");
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376 | if (defined $mp3_title) {
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377 | $doc_obj->add_metadata ($section, "Title", $mp3_title);
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378 | }
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379 | else {
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380 | &BasPlug::title_fallback($self, $doc_obj, $section, $file);
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381 | }
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382 | }
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383 | }
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384 |
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385 |
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386 | 1;
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387 |
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388 |
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389 |
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390 |
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391 |
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392 |
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393 |
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394 |
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395 |
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396 |
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397 |
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