modified for lwir images

/**

 * @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.

 * @copyright Copyright (C) 2017-2021 Elphel Inc.

 * @author Elphel Inc. <support-list@support.elphel.com>

 *

 * @par <b>License</b>:

 *  You should have received a copy of the GNU General Public License

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

   define('START_TIFF',     hex2bin('4d4d002a')); // start of a TIFF, JP/JP4 also have this TIFF marker

   define('START_JP',       hex2bin('ffd8ffe1')); // start of JPEG/JP4, TIFF usually does not have JPEG/JP4 markers

//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"));

//$startMarkerWithExif=chr(hexdec("4d")).chr(hexdec("4d")).chr(hexdec("00")).chr(hexdec("2a"));

//$startMarkerWithExif=chr(hexdec("ff")).chr(hexdec("d8")).chr(hexdec("ff")).chr(hexdec("e1"));

$input_exts = array("img","bin","mov");

// use current dir

$move_processed = false;

$processed_subdir = "processed";

$forced_ext = "tiff";

$forced_ext = "";

$add_to_chn = -1; // do not use and do not create scene directories

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]

    ~$ {$argv[0]} path=[path-to-dir] dest_path=[dest-subdir] move_processed=[move-processed-files] ext=[forced-ext] chn_offs=[add-to-chn]

    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

      * add-to-chn             - integer - add to decoded channel number

  * Examples:

    ** Split all *.img, *.bin and *.mov files in the current dir and 1 dir down, puts results to '0/':

  $forced_ext = $_GET['ext'];

}

if (isset($_GET['chn_offs'])){

  $add_to_chn = (integer) $_GET['chn_offs'];

}

$list = preg_grep('/^([^.])/', scandir($path));

if (!is_dir("$path/$destination")) mkdir("$path/$destination",0777);

    if ($item==$processed_subdir) continue;

    $sublist = preg_grep('/^([^.])/', scandir("$path/$item"));

    foreach($sublist as $subitem){

      if (split_file("$path/$item","$subitem","../$destination")==0){

      if (split_file("$path/$item","$subitem","../$destination",$add_to_chn)==0){

        if ($move_processed){

          if (!is_dir("$path/$item/$processed_subdir")){

            mkdir("$path/$item/$processed_subdir",0777);

      }

    }

  }else{

    if (split_file("$path","$item","$destination")==0){

    if (split_file("$path","$item","$destination",$add_to_chn)==0){

      if ($move_processed){

        if (!is_dir("$path/$processed_subdir")){

          mkdir("$path/$processed_subdir",0777);

  }

}

function split_file($path,$file,$destination){

//./extract_images_tiff.php path=/home/eyesis/captures/tests/jp4/ dest_path=results chn_offs=16

function split_file($path,$file,$destination,$add_to_chn=-1){

  global $startMarkerWithExif;

//  global $startMarkerWithExif = START_JP; // START_TIFF

  global $chunksize;

  global $input_exts;

  global $forced_ext;

  if (in_array(get_ext("$path/$file"),$input_exts)) {

    echo "Splitting $path/$file, results dir: $path/$destination\n";

    echo date(DATE_RFC2822).": Splitting $path/$file, results dir: $path/$destination\n";

    //split_mov("$path",$file,$destination,$extension,$startMarkerWithExif,$chunksize);

    $file_type = 0; // JP4/JPEG

    $markers=array();

    $offset =0;

    $f=fopen("$path/$file","r");

    $s = fread($f,$chunksize);

    $pos_jp =   strpos($s,START_JP);

    $pos_tiff = strpos($s,START_TIFF);

    if (($pos_jp === false) && ($pos_tiff === false)) {

        print ("None of TIFF (".bin2hex(START_TIFF).") or JP4/JPEG (".bin2hex(START_JP).") markers found in the first ".$chunksize." bytes of the file $path/$file\n");

        return -1;

    }

    if ($pos_jp === false) {

        $file_type = 1; // tiff

    } else if (($pos_tiff !== false) && ($pos_tiff < $pos_jp)){ // reducing probability of stray START_JP

        $file_type = 1; // tiff

    } else {

        $file_type = 0; // jpeg/jp4

    }

    $startMarkerWithExif = $file_type? START_TIFF: START_JP; // START_TIFF

    echo "Detected image type ".($file_type?'TIFF':'JPEG/JP4').".\n";

    $forced_ext = $file_type?'tiff':''; // was ".tiff":""

    fclose($f); // not sure if feof is cleraed by fseek, closing/ reopening

    $f=fopen("$path/$file","r");

    //first scan

    while (!feof($f)) {

      $pos=0;

      $tmp_name = "$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");

      $result_name = elphel_specific_result_name($tmp_name,$add_to_chn);

      $dest_image = "$path/$destination/$result_name"; // $result_name may now include "/"

      $dest_set_dir = dirname($dest_image);

      if (!is_dir($dest_set_dir)){

          mkdir($dest_set_dir,0777);

      }

      rename($tmp_name, $dest_image); // "$path/$destination/$result_name");

    }

    return 0;

  }

}

function elphel_specific_result_name($file){

function elphel_specific_result_name($file,$add_to_chn=-10){

  global $forced_ext;

  // $add_to_chn<0 - do not use it and do not use scene directories

  $use_scene_dirs = $add_to_chn >= 0;

  if ($add_to_chn < 0){

      $add_to_chn = 0;

  }

  $exif = exif_read_data($file);

  $exif = exif_read_data($file); // gets false find, what is wrong

  $ext = elphel_specific_result_ext($exif,$forced_ext);

  //converting GMT a local time GMT+7

  $timestamp_local=strtotime($exif['DateTimeOriginal']);/*-25200;*/

  $timestamp_local=strtotime($exif['DateTimeOriginal']);/*-25200;*/ //

  $subsecs = $exif['SubSecTimeOriginal'];

  $subsecs = $exif['SubSecTimeOriginal']; // 

  $tmp = explode("_",$exif['Model']);

  $tmp = explode("_",$exif['Model']); //

  if (count($tmp)==2){

    if (trim($tmp[0])=="Eyesis4pi393"){

    }

  }else{

    $k = intval($exif['PageNumber'])+1;

    $k = intval($exif['PageNumber'])+1; //

  }

  if ($use_scene_dirs) {

      $k += $add_to_chn;

      return "{$timestamp_local}_{$subsecs}/{$timestamp_local}_{$subsecs}_$k.$ext";

  } else {

      return "{$timestamp_local}_{$subsecs}_$k.$ext";

  }

}

function get_ext($filename) {