[30110] | 1 | package OCRImageConverter;
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| 2 |
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| 3 | use BaseMediaConverter;
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| 4 |
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| 5 | use strict;
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| 6 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 7 | no strict 'subs'; # allow barewords (eg STDERR) as function arguments
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| 8 |
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| 9 | use gsprintf 'gsprintf';
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| 10 |
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| 11 | # these two variables mustn't be initialised here or they will get stuck
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| 12 | # at those values.
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| 13 | our $ocrimage_conversion_available;
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| 14 | our $no_ocrimage_conversion_reason;
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| 15 |
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| 16 | BEGIN {
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| 17 | @OCRImageConverter::ISA = ('BaseMediaConverter');
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| 18 |
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| 19 | # Check that PDFBox is installed and available on the path
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| 20 | $ocrimage_conversion_available = 1;
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| 21 |
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| 22 | if (!defined $ENV{'GEXTOCR'}) {
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| 23 | $ocrimage_conversion_available = 0;
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| 24 | $no_ocrimage_conversion_reason = "gextocrnotinstalled";
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| 25 | } else {
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| 26 | my $gextocr_home = $ENV{'GEXTOCR'};
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| 27 | #my $pbajar = &FileUtils::filenameConcatenate($gextpb_home,"lib","java","pdfbox-app.jar");
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| 28 | my $tesseract = &FileUtils::filenameConcatenate($gextocr_home, "installed", "cmdline", "bin", "tesseract");
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| 29 |
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| 30 | if (!-e $tesseract) {
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| 31 | &gsprintf(STDERR, "**** Failed to find $tesseract\n");
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| 32 | $ocrimage_conversion_available = 0;
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| 33 | $no_ocrimage_conversion_reason = "gexttesseractnotinstalled";
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| 34 | } else {
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| 35 | my $cmd = "\"$tesseract\" -v ";
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| 36 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
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| 37 | $cmd .= " >nul 2>&1"; # java 2>&1 >null or java >null 2>&1 both work (%ERRORLEVEL% is 0)
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| 38 | } else {
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| 39 | # On Ubuntu, java >/dev/null 2>&1 works,
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| 40 | # but java 2>&1 >/dev/null doesn't work: output goes to screen anyway
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| 41 | $cmd .= " >/dev/null 2>&1"; # " >/dev/null 2>&1 &" - don't need & at end for Linux Centos anymore (Ubuntu was already fine without it)
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| 42 | }
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| 43 |
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| 44 | my $status = system($cmd);
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| 45 |
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| 46 | if ($status != 0) {
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| 47 | my $error_message = "**** Testing for Tesseract\n";
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| 48 | $error_message .= "Failed to run: $cmd\n";
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| 49 | $error_message .= "Error variable: |$!| and status: $status\n";
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| 50 |
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| 51 | &gsprintf(STDERR, "OCRImageConverter: $error_message");
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| 52 |
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| 53 | $ocrimage_conversion_available = 0;
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| 54 | $no_ocrimage_conversion_reason = "couldnotruntesseract";
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| 55 | }
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | }
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| 60 |
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| 61 | my $arguments = [ ];
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| 62 |
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| 63 | my $options = {
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| 64 | 'name' => "OCRImageConverter",
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| 65 | 'desc' => "{OCRImageConverter.desc}",
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| 66 | 'abstract' => "yes",
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| 67 | 'inherits' => "yes",
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| 68 | 'args' => $arguments
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| 69 | };
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| 70 |
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| 71 | sub new {
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| 72 | my ($class) = shift (@_);
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| 73 | my ($pluginlist, $inputargs, $hashArgOptLists, $auxilary) = @_;
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| 74 | push(@$pluginlist, $class);
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| 75 |
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| 76 | push(@{$hashArgOptLists->{"ArgList"}}, @{$arguments});
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| 77 | push(@{$hashArgOptLists->{"OptList"}}, $options);
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| 78 |
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| 79 |
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| 80 | my $self = new BaseMediaConverter($pluginlist, $inputargs, $hashArgOptLists, $auxilary);
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| 81 |
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| 82 | if ($self->{'info_only'}) {
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| 83 | # don't worry about any options etc
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| 84 | return bless $self, $class;
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| 85 | }
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| 86 |
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| 87 | if ($ocrimage_conversion_available) {
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| 88 | my $gextocr_home = $ENV{'GEXTOCR'};
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| 89 | my $tesseract = &FileUtils::filenameConcatenate($gextocr_home, "installed", "cmdline", "bin", "tesseract");
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| 90 | my $lang = "eng"; # TODO
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| 91 | my $launch_cmd = "\"$tesseract\" -l $lang ";
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| 92 |
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| 93 | $self->{'ocrimage_launch_cmd'} = $launch_cmd;
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| 94 | } else {
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| 95 | $self->{'no_ocrimage_conversion_reason'} = $no_ocrimage_conversion_reason;
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| 96 |
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| 97 | my $outhandle = $self->{'outhandle'};
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| 98 | &gsprintf($outhandle, "OCRImageConverter: {OCRImageConverter.noconversionavailable} ({OCRImageConverter.$no_ocrimage_conversion_reason})\n");
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| 99 | }
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| 100 |
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| 101 | $self->{'ocrimage_conversion_available'} = $ocrimage_conversion_available;
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| 102 |
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| 103 | return bless $self, $class;
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| 104 | }
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| 105 |
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| 106 | sub init {
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| 107 | my $self = shift(@_);
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| 108 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 109 |
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| 110 | $self->{'ocrtmp_file_paths'} = ();
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| 111 | }
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| 112 |
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| 113 | sub deinit {
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| 114 | my $self = shift(@_);
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| 115 |
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| 116 | $self->clean_up_temporary_files();
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| 117 | }
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| 118 |
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| 119 | sub convert {
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| 120 | my $self = shift(@_);
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| 121 | my ($source_file_full_path) = @_;
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| 122 |
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| 123 | print STDERR "***** WE ARE WORKING *****\n";
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| 124 |
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| 125 | # TODO cache
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| 126 | if (lc(substr($source_file_full_path, length($source_file_full_path) - 4)) eq ".gif") {
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| 127 | # need to convert to another format first
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| 128 | #my $target_source = substr($source_file_full_path, length($source_file_full_path) - 4) . ".tif";
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| 129 | my $converted_file = &util::get_tmp_filename("tif");
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| 130 | push(@{$self->{'ocrtmp_file_paths'}}, $converted_file);
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| 131 |
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| 132 | my $imagick_cmd = "\"" . &util::get_perl_exec() . "\" -S gs-magick.pl convert \"$source_file_full_path\" \"$converted_file\"";
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| 133 | system($imagick_cmd);
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| 134 |
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| 135 | print STDERR "*** Magick command: $imagick_cmd\n";
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| 136 |
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| 137 | $source_file_full_path = $converted_file;
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| 138 | print STDERR "*** Converted file: $converted_file\n";
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| 139 | }
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| 140 |
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| 141 | my $source_file_no_path = &File::Basename::basename($source_file_full_path);
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| 142 |
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| 143 | return 0 unless $ocrimage_conversion_available;
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| 144 | return 0 if (!-f $source_file_full_path);
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| 145 |
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| 146 | my $outhandle = $self->{'outhandle'};
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| 147 | my $verbosity = $self->{'verbosity'};
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| 148 |
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| 149 | my $target_file_path;
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| 150 |
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| 151 | if ($self->{'enable_cache'}) {
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| 152 | $self->init_cache_for_file($source_file_full_path);
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| 153 | my $cache_dir = $self->{'cached_dir'};
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| 154 | my $file_root = $self->{'cached_file_root'};
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| 155 |
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| 156 | $target_file_path = &FileUtils::filenameConcatenate($cache_dir, $file_root);
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| 157 | } else {
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| 158 | $target_file_path = &util::get_tmp_filename("txt");
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| 159 | push(@{$self->{'ocrtmp_file_paths'}}, $target_file_path);
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| 160 | }
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| 161 |
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| 162 | my $convert_cmd = "";
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| 163 | my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($source_file_full_path, "\\.[^\\.]+\$");
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| 164 |
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| 165 | $convert_cmd = $self->{'ocrimage_launch_cmd'};
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| 166 | $convert_cmd .= " \"$source_file_full_path\" \"" . substr($target_file_path, 0, length($target_file_path) - 4) . "\"";
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| 167 |
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| 168 | #&gsprintf(STDERR, "OCRImageConverter convert command: $convert_cmd\n");
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| 169 | print STDERR "OCRImageConverter convert command: $convert_cmd\n";
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| 170 |
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| 171 | my $print_info = {
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| 172 | 'message_prefix' => "OCR Conversion",
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| 173 | 'message' => "Converting $source_file_no_path."
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| 174 | };
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| 175 |
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| 176 | my ($regenerated, $result, $had_error) = $self->autorun_general_cmd($convert_cmd, $source_file_full_path, $target_file_path, $print_info);
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| 177 |
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| 178 | if ($had_error) {
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| 179 | return (0, $result, $target_file_path);
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| 180 | } else {
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| 181 | return (1, $result, $target_file_path);
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| 182 | }
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| 183 | }
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| 184 |
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| 185 | sub convert_without_result {
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| 186 | my $self = shift(@_);
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| 187 |
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| 188 | my $source_file_path = shift(@_);
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| 189 | my $target_file_type = shift(@_);
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| 190 | my $convert_options = shift(@_) || "";
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| 191 | my $convert_id = shift(@_) || "";
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| 192 |
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| 193 | return $self->convert($source_file_path,$target_file_type,
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| 194 | $convert_options,$convert_id,"without_result");
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| 195 | }
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| 196 |
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| 197 | sub clean_up_temporary_files {
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| 198 | my $self = shift(@_);
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| 199 |
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| 200 | foreach my $ocrtmp_file_path (@{$self->{'ocrtmp_file_paths'}}) {
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| 201 | if (-d $ocrtmp_file_path) {
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| 202 | #print STDERR "@@@@@@ cleanup called on $pbtmp_file_path\n";
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| 203 | &FileUtils::removeFilesRecursive($ocrtmp_file_path);
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| 204 | } elsif (-e $ocrtmp_file_path) {
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| 205 | &FileUtils::removeFiles($ocrtmp_file_path);
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| 206 | }
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| 207 | }
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| 208 |
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| 209 | $self->{'ocrtmp_file_paths'} = ();
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| 210 | }
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| 211 |
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| 212 | 1;
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