1 | ###########################################################################
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2 | #
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3 | # BaseMediaConverter - helper plugin that provide base functionality for
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4 | # image/video conversion using ImageMagick/ffmpeg
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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) 2008 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 | package BaseMediaConverter;
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28 |
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29 | use PrintInfo;
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30 |
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31 | use convertutil;
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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 | use gsprintf 'gsprintf';
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36 |
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37 | BEGIN {
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38 | @BaseMediaConverter::ISA = ('PrintInfo');
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39 | }
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40 |
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41 | my $arguments = [
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42 | { 'name' => "enable_cache",
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43 | 'desc' => "{BaseMediaConverter.enable_cache}",
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44 | 'type' => "flag",
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45 | 'reqd' => "no",
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46 | }
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47 |
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48 | ];
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49 |
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50 | my $options = { 'name' => "BaseMediaConverter",
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51 | 'desc' => "{BaseMediaConverter.desc}",
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52 | 'abstract' => "yes",
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53 | 'inherits' => "yes",
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54 | 'args' => $arguments };
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55 |
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56 | sub new {
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57 | my ($class) = shift (@_);
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58 | my ($pluginlist,$inputargs,$hashArgOptLists,$auxiliary) = @_;
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59 | push(@$pluginlist, $class);
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60 |
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61 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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62 | push(@{$hashArgOptLists->{"OptList"}},$options);
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63 |
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64 | my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists, $auxiliary);
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65 |
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66 | return bless $self, $class;
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67 | }
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68 |
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69 | sub begin {
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70 | my $self = shift (@_);
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71 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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72 |
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73 | # Save base_dir for use in file cache
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74 | $self->{'base_dir'} = $base_dir;
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75 | }
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76 |
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77 |
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78 | sub init_cache_for_file
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79 | {
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80 | my $self = shift @_;
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81 | my ($filename) = @_;
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82 |
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83 | my $verbosity = $self->{'verbosity'};
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84 | my $outhandle = $self->{'outhandle'};
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85 | my $base_dir = $self->{'base_dir'};
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86 |
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87 | my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
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88 | $collect_dir =~ s/\\/\//g; # Work in Unix style world
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89 |
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90 | ## print STDERR "**** base_dir = ", $base_dir, "\n";
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91 |
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92 | # Work out relative filename within 'base_dir'
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93 | $filename =~ s/\\/\//g;
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94 | $base_dir =~ s/\\/\//g;
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95 | my ($file) = ($filename =~ m/^$base_dir(.*?)$/);
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96 |
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97 | if (!defined $file) {
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98 | # Perhaps the filename is taken from within cache_dir area?
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99 | my $prev_cached_dir = $self->{'cached_dir'};
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100 | ($file) = ($filename =~ m/^$prev_cached_dir(.*?)$/);
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101 | }
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102 |
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103 | $file =~ s/^\/|\\//; # get rid of leading slash from relative filename
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104 |
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105 |
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106 | # Setup cached_dir and file_root
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107 |
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108 | my ($file_root, $dirname, $suffix)
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109 | = &File::Basename::fileparse($file, "\\.[^\\.]+\$");
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110 |
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111 |
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112 | # if dirname is in collections tmp area, remove collect_dir prefix
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113 | $dirname =~ s/^$collect_dir//;
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114 |
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115 | if ($ENV{'GSDLOS'} eq "windows") {
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116 | # if dirname starts with Windows drive letter, strip it off
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117 | $dirname =~ s/^[a-z]:\///i;
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118 | }
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119 |
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120 | my $base_output_dir = &FileUtils::filenameConcatenate($collect_dir,"cached",$dirname);
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121 |
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122 | if (!-e $base_output_dir ) {
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123 | print $outhandle "Creating directory $base_output_dir\n"
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124 | if ($verbosity>2);
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125 |
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126 | &FileUtils::makeAllDirectories($base_output_dir);
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127 | }
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128 |
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129 | my $output_dir = &FileUtils::filenameConcatenate($base_output_dir,$file_root);
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130 |
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131 | if (!-e $output_dir) {
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132 | print $outhandle "Creating directory $output_dir\n"
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133 | if ($verbosity>2);
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134 |
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135 | &FileUtils::makeAllDirectories($output_dir);
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136 | }
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137 |
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138 | $self->{'cached_dir'} = $output_dir;
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139 | $self->{'cached_file_root'} = $file_root;
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140 | }
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141 |
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142 |
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143 |
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144 | sub run_general_cmd
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145 | {
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146 | my $self = shift @_;
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147 | my ($command,$print_info) = @_;
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148 |
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149 |
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150 | if (!defined $print_info->{'verbosity'}) {
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151 | $print_info->{'verbosity'} = $self->{'verbosity'};
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152 | }
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153 |
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154 | if (!defined $print_info->{'outhandle'}) {
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155 | $print_info->{'outhandle'} = $self->{'outhandle'};
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156 | }
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157 |
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158 |
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159 | return &convertutil::run_general_cmd(@_);
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160 | }
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161 |
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162 |
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163 | sub regenerate_general_cmd
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164 | {
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165 | my $self = shift @_;
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166 | my ($command,$ifilename,$ofilename,$print_info) = @_;
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167 |
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168 | if (!defined $print_info->{'verbosity'}) {
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169 | $print_info->{'verbosity'} = $self->{'verbosity'};
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170 | }
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171 |
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172 | if (!defined $print_info->{'outhandle'}) {
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173 | $print_info->{'outhandle'} = $self->{'outhandle'};
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174 | }
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175 |
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176 | return &convertutil::regenerate_general_cmd(@_);
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177 | }
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178 |
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179 |
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180 |
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181 | sub run_uncached_general_cmd
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182 | {
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183 | my $self = shift @_;
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184 |
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185 | my ($command,$ifilename,$ofilename,$print_info) = @_;
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186 |
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187 | return $self->run_general_cmd($command,$print_info);
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188 | }
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189 |
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190 |
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191 |
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192 | sub run_cached_general_cmd
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193 | {
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194 | my $self = shift @_;
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195 |
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196 | my ($command,$ifilename,$ofilename,$print_info) = @_;
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197 |
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198 | if (!defined $print_info->{'verbosity'}) {
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199 | $print_info->{'verbosity'} = $self->{'verbosity'};
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200 | }
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201 |
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202 | if (!defined $print_info->{'outhandle'}) {
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203 | $print_info->{'outhandle'} = $self->{'outhandle'};
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204 | }
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205 |
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206 | return &convertutil::run_cached_general_cmd(@_);
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207 | }
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208 |
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209 |
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210 |
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211 | sub autorun_general_cmd
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212 | {
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213 | my $self = shift @_;
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214 |
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215 | my ($command,$ifilename,$ofilename,$print_info) = @_;
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216 |
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217 | my $result;
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218 | my $regenerated;
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219 | my $had_error;
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220 |
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221 | if ($self->{'enable_cache'}) {
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222 | ($regenerated,$result,$had_error)
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223 | = $self->run_cached_general_cmd($command,$ifilename,$ofilename,$print_info);
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224 | }
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225 | else {
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226 | $regenerated = 1; # always true for a command that is always run
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227 | ($result,$had_error)
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228 | = $self->run_general_cmd($command,$print_info);
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229 | }
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230 |
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231 | return ($regenerated,$result,$had_error);
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232 | }
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233 |
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234 |
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235 | #
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236 | 1;
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