module.graphic.svg.php

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<?php
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
// See readme.txt for more details                             //
//                                                             //
// module.graphic.svg.php                                      //
// module for analyzing SVG Image files                        //
// dependencies: NONE                                          //
//                                                            ///


class getid3_svg extends getid3_handler
{


        public function Analyze() {
                $info = &$this->getid3->info;

                $this->fseek($info['avdataoffset']);

                $SVGheader = $this->fread(4096);
                if (preg_match('#<\?xml([^>]+)\?>#i', $SVGheader, $matches)) {
                        $info['svg']['xml']['raw'] = $matches;
                }
                if (preg_match('#<\!DOCTYPE([^>]+)>#i', $SVGheader, $matches)) {
                        $info['svg']['doctype']['raw'] = $matches;
                }
                if (preg_match('#<svg([^>]+)>#i', $SVGheader, $matches)) {
                        $info['svg']['svg']['raw'] = $matches;
                }
                if (isset($info['svg']['svg']['raw'])) {

                        $sections_to_fix = array('xml', 'doctype', 'svg');
                        foreach ($sections_to_fix as $section_to_fix) {
                                if (!isset($info['svg'][$section_to_fix])) {
                                        continue;
                                }
                                $section_data = array();
                                while (preg_match('/ "([^"]+)"/', $info['svg'][$section_to_fix]['raw'][1], $matches)) {
                                        $section_data[] = $matches[1];
                                        $info['svg'][$section_to_fix]['raw'][1] = str_replace($matches[0], '', $info['svg'][$section_to_fix]['raw'][1]);
                                }
                                while (preg_match('/([^\s]+)="([^"]+)"/', $info['svg'][$section_to_fix]['raw'][1], $matches)) {
                                        $section_data[] = $matches[0];
                                        $info['svg'][$section_to_fix]['raw'][1] = str_replace($matches[0], '', $info['svg'][$section_to_fix]['raw'][1]);
                                }
                                $section_data = array_merge($section_data, preg_split('/[\s,]+/', $info['svg'][$section_to_fix]['raw'][1]));
                                foreach ($section_data as $keyvaluepair) {
                                        $keyvaluepair = trim($keyvaluepair);
                                        if ($keyvaluepair) {
                                                $keyvalueexploded = explode('=', $keyvaluepair);
                                                $key   = (isset($keyvalueexploded[0]) ? $keyvalueexploded[0] : '');
                                                $value = (isset($keyvalueexploded[1]) ? $keyvalueexploded[1] : '');
                                                $info['svg'][$section_to_fix]['sections'][$key] = trim($value, '"');
                                        }
                                }
                        }

                        $info['fileformat']                  = 'svg';
                        $info['video']['dataformat']         = 'svg';
                        $info['video']['lossless']           = true;
                        //$info['video']['bits_per_sample']    = 24;
                        $info['video']['pixel_aspect_ratio'] = (float) 1;

                        if (!empty($info['svg']['svg']['sections']['width'])) {
                                $info['svg']['width']  = intval($info['svg']['svg']['sections']['width']);
                        }
                        if (!empty($info['svg']['svg']['sections']['height'])) {
                                $info['svg']['height'] = intval($info['svg']['svg']['sections']['height']);
                        }
                        if (!empty($info['svg']['svg']['sections']['version'])) {
                                $info['svg']['version'] = $info['svg']['svg']['sections']['version'];
                        }
                        if (!isset($info['svg']['version']) && isset($info['svg']['doctype']['sections'])) {
                                foreach ($info['svg']['doctype']['sections'] as $key => $value) {
                                        if (preg_match('#//W3C//DTD SVG ([0-9\.]+)//#i', $key, $matches)) {
                                                $info['svg']['version'] = $matches[1];
                                                break;
                                        }
                                }
                        }

                        if (!empty($info['svg']['width'])) {
                                $info['video']['resolution_x'] = $info['svg']['width'];
                        }
                        if (!empty($info['svg']['height'])) {
                                $info['video']['resolution_y'] = $info['svg']['height'];
                        }

                        return true;
                }
                $this->error('Did not find expected <svg> tag');
                return false;
        }

}