extract tiffs

extract_images_tiff.php

+#!/usr/bin/env php
+<?php
+/**
+ * @file extract_images.php
+ * @brief split mov/bin/img's (by exif header) into single image files - looks one dir down from the specified path
+ * @copyright Copyright (C) 2017 Elphel Inc.
+ * @author Elphel Inc. <support-list@support.elphel.com>
+ *
+ * @par <b>License</b>:
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//disable the default time limit for php scripts.
+set_time_limit(0);
+
+$chunksize=10000000; //10MB 
+$startMarkerWithExif=chr(hexdec("4d")).chr(hexdec("4d")).chr(hexdec("00")).chr(hexdec("2a"));
+$input_exts = array("img","bin","mov");
+
+// use current dir
+$path=".";
+$destination = "0";
+
+$move_processed = false;
+$processed_subdir = "processed";
+
+$forced_ext = "tiff";
+
+function print_help(){
+  global $argv;
+  
+  echo <<<"TXT"
+Help:
+  * Usage:
+    ~$ {$argv[0]} path=[path-to-dir] dest_path=[dest-subdir] move_processed=[move-processed-files] ext=[forced-ext]
+    
+    where:
+      * path-to-dir            - string - scan this path + 1 dir down
+      * dest-subdir            - string - save results to "path-to-dir/dest-subdir/"
+      * move-processed-files - 0(default) or 1 - if not 1 - will not move the processed files
+      * forced-ext             - string - override extensions from exifs with this one
+    
+  * Examples:
+    ** Split all *.img, *.bin and *.mov files in the current dir and 1 dir down, puts results to '0/':
+      ~$ {$argv[0]}
+    ** Split in /data/test + 1 dir down, create and move processed files to /data/test/processed for files in path and /data/test/any-found-subdir/processed for any files found in /data/test/any-found-subdir
+      ~$ {$argv[0]} path=/data/test move_processed=1
+    ** Split all *.img, *.bin and *.mov files in the current dir and 1 dir down, puts results to 'results/', override extensions with 'jpg':
+      ~$ {$argv[0]} dest_path=results ext=jpg
+
+TXT;
+
+}
+
+if ($argv){
+  foreach($argv as $k=>$v){
+    if ($k==0) continue;
+    $args = explode("=",$v);
+    if (isset($args[1])) $_GET[$args[0]] = $args[1];
+    if ($v=="-h"||$v=="--help"||$v=="help") {
+      print_help();
+      die();
+    }
+  }
+}
+
+if (isset($_GET['path'])){
+  $path=$_GET['path'];
+}
+
+// put results to $path/$destination/
+// no need for argv
+if (isset($_GET['dest_path'])){
+  $destination = $_GET['dest_path'];
+}
+
+if (isset($_GET['move_processed'])){
+  $move_processed = $_GET['move_processed'];
+}
+
+if ($move_processed=="1"){
+  $move_processed = true;
+}else{
+  $move_processed = false;
+}
+
+// enforce extension
+if (isset($_GET['ext'])){
+  $forced_ext = $_GET['ext'];
+}
+
+$list = preg_grep('/^([^.])/', scandir($path));
+
+if (!is_dir("$path/$destination")) mkdir("$path/$destination",0777);
+
+foreach ($list as $item) {
+  if (is_dir("$path/$item")){
+    if ($item==$processed_subdir) continue;
+    $sublist = preg_grep('/^([^.])/', scandir("$path/$item"));
+    foreach($sublist as $subitem){
+      if (split_file("$path/$item","$subitem","../$destination")==0){
+        if ($move_processed){
+          if (!is_dir("$path/$item/$processed_subdir")){
+            mkdir("$path/$item/$processed_subdir",0777);
+          }
+          rename("$path/$item/$subitem","$path/$item/$processed_subdir/$subitem");
+        }
+      }
+    }
+  }else{
+    if (split_file("$path","$item","$destination")==0){
+      if ($move_processed){
+        if (!is_dir("$path/$processed_subdir")){
+          mkdir("$path/$processed_subdir",0777);
+        }
+        rename("$path/$item","$path/$processed_subdir/$item");
+      }
+    }
+  }
+}
+
+function split_file($path,$file,$destination){
+
+  global $startMarkerWithExif;
+  global $chunksize;
+  global $input_exts;
+  
+  if (in_array(get_ext("$path/$file"),$input_exts)) {
+    echo "Splitting $path/$file, results dir: $path/$destination\n";
+    //split_mov("$path",$file,$destination,$extension,$startMarkerWithExif,$chunksize);
+    
+    $markers=array();
+    $offset =0;
+    
+    $f=fopen("$path/$file","r");
+    
+    //first scan
+    while (!feof($f)) {
+      $pos=0;
+      $index=0;
+      fseek($f,$offset);
+      $s = fread($f,$chunksize);
+      while(true){
+        $pos=strpos($s,$startMarkerWithExif,$pos);
+        if ($pos === false) break;
+        $markers[count($markers)]=$offset+$pos;
+        $pos++;
+      }
+      $offset+=(strlen($s)-strlen($startMarkerWithExif)+1); // so each marker will appear once
+    }
+    
+    $markers[count($markers)]=$offset+strlen($s); // full length of the file
+   
+    echo "  images found: ".(count($markers)-1)."\n";
+   
+    //second scan
+    for ($i=0;$i<(count($markers)-1);$i++) {
+
+      fseek($f,$markers[$i]);
+      $s = fread($f,$markers[$i+1]-$markers[$i]);
+
+      $tmp_name = "$path/$destination/image.tmp";
+      file_put_contents($tmp_name,$s);
+
+      $result_name = elphel_specific_result_name($tmp_name);
+
+      rename($tmp_name,"$path/$destination/$result_name");
+    }
+    
+    return 0;
+  }else{
+    return -1;
+  }
+}
+
+function elphel_specific_result_name($file){
+
+  global $forced_ext;
+
+  $exif = exif_read_data($file);
+  
+  $ext = elphel_specific_result_ext($exif,$forced_ext);
+  
+  //converting GMT a local time GMT+7
+  $timestamp_local=strtotime($exif['DateTimeOriginal']);/*-25200;*/
+  
+  $subsecs = $exif['SubSecTimeOriginal'];
+  
+  $tmp = explode("_",$exif['Model']);
+  if (count($tmp)==2){
+    
+    if (trim($tmp[0])=="Eyesis4pi393"){
+    
+      $model = intval(trim($tmp[1]));
+      $chn = intval($exif['PageNumber'])+1;
+      
+      if        ($model==1001) {
+        $k=$chn;
+      }else  if ($model==1002) {
+        $k=$chn+4;
+      }else  if ($model==1003) {
+        $k=$chn+6;
+      }
+      
+    }else{
+        $ks = $exif['PageNumber'];
+        if (count($ks==2)){
+            $k = $ks[0];
+        }else{
+            $k = intval($exif['PageNumber'])+1;
+        }
+    }
+    
+  }else{
+    $k = intval($exif['PageNumber'])+1;
+  }
+  
+  return "{$timestamp_local}_{$subsecs}_$k.$ext";
+  
+}
+
+function get_ext($filename) {
+  return pathinfo($filename, PATHINFO_EXTENSION);
+}
+
+/**
+ * read image format and return extension, elphel elphel_specific
+ * @param array $exif Array returned from the PHP's built-in exif_read_data function
+ * @param string $override_ext
+ * @return string extension - jpeg or jp4
+ */
+function elphel_specific_result_ext($exif,$override_ext=""){
+  
+  //default value
+  $ext = "jpeg";
+  
+  if ($override_ext==""){
+    if (isset($exif['MakerNote'][10])){
+      $record = ($exif['MakerNote'][10]>>4)&0xf;
+      if ($record==5) $ext = "jp4";
+    }
+  }else{
+    $ext = $override_ext;
+  }
+  return $ext;
+}
+
+?>