Initial commit

1 files changed, 80 insertions, 0 deletions

diff --git a/includes/getid3/module.audio-video.ivf.php b/includes/getid3/module.audio-video.ivf.php
new file mode 100644
index 0000000..791b88b
--- /dev/null
+++ b/includes/getid3/module.audio-video.ivf.php
@@ -0,0 +1,80 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org>               //
+//  available at https://github.com/JamesHeinrich/getID3       //
+//            or https://www.getid3.org                        //
+//            or http://getid3.sourceforge.net                 //
+//  see readme.txt for more details                            //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+// module.audio.ivf.php                                        //
+// module for analyzing IVF audio-video files                  //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
+	exit;
+}
+
+class getid3_ivf extends getid3_handler
+{
+	/**
+	 * @return bool
+	 */
+	public function Analyze() {
+		$info = &$this->getid3->info;
+
+		$info['fileformat']          = 'ivf';
+		$info['video']['dataformat'] = 'ivf';
+
+		$this->fseek($info['avdataoffset']);
+		$IVFheader = $this->fread(32);
+
+		if (substr($IVFheader, 0, 4) == 'DKIF') {
+
+			// https://wiki.multimedia.cx/index.php/IVF
+			$info['ivf']['header']['signature']            =                              substr($IVFheader,  0, 4);
+			$info['ivf']['header']['version']              = getid3_lib::LittleEndian2Int(substr($IVFheader,  4, 2)); // should be 0
+			$info['ivf']['header']['headersize']           = getid3_lib::LittleEndian2Int(substr($IVFheader,  6, 2));
+			$info['ivf']['header']['fourcc']               =                              substr($IVFheader,  8, 4);
+			$info['ivf']['header']['resolution_x']         = getid3_lib::LittleEndian2Int(substr($IVFheader, 12, 2));
+			$info['ivf']['header']['resolution_y']         = getid3_lib::LittleEndian2Int(substr($IVFheader, 14, 2));
+			$info['ivf']['header']['timebase_numerator']   = getid3_lib::LittleEndian2Int(substr($IVFheader, 16, 4));
+			$info['ivf']['header']['timebase_denominator'] = getid3_lib::LittleEndian2Int(substr($IVFheader, 20, 4));
+			$info['ivf']['header']['frame_count']          = getid3_lib::LittleEndian2Int(substr($IVFheader, 24, 4));
+			//$info['ivf']['header']['reserved']             =                              substr($IVFheader, 28, 4);
+
+			$info['ivf']['header']['frame_rate'] = (float) $info['ivf']['header']['timebase_numerator'] / $info['ivf']['header']['timebase_denominator'];
+
+			if ($info['ivf']['header']['version'] > 0) {
+				$this->warning('Expecting IVF header version 0, found version '.$info['ivf']['header']['version'].', results may not be accurate');
+			}
+
+			$info['video']['resolution_x']    =         $info['ivf']['header']['resolution_x'];
+			$info['video']['resolution_y']    =         $info['ivf']['header']['resolution_y'];
+			$info['video']['codec']           =         $info['ivf']['header']['fourcc'];
+
+			$info['ivf']['frame_count'] = 0;
+			while (!$this->feof()) {
+				if ($frameheader = $this->fread(12)) {
+					$framesize = getid3_lib::LittleEndian2Int(substr($frameheader, 0, 4)); // size of frame in bytes (not including the 12-byte header)
+					$timestamp = getid3_lib::LittleEndian2Int(substr($frameheader, 4, 8)); // 64-bit presentation timestamp
+					$this->fseek($framesize, SEEK_CUR);
+					$info['ivf']['frame_count']++;
+				}
+			}
+			if ($info['ivf']['frame_count']) {
+				$info['playtime_seconds']    = $timestamp / 100000;
+				$info['video']['frame_rate'] = (float) $info['ivf']['frame_count'] / $info['playtime_seconds'];
+			}
+
+		} else {
+			$this->error('Expecting "DKIF" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($IVFheader, 0, 4)).'"');
+			return false;
+		}
+
+		return true;
+	}
+
+}