--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// write.real.php //
+// module for writing RealAudio/RealVideo tags //
+// dependencies: module.tag.real.php //
+// ///
+/////////////////////////////////////////////////////////////////
+
+class getid3_write_real
+{
+ public $filename;
+ public $tag_data = array();
+ public $fread_buffer_size = 32768; // read buffer size in bytes
+ public $warnings = array(); // any non-critical errors will be stored here
+ public $errors = array(); // any critical errors will be stored here
+ public $paddedlength = 512; // minimum length of CONT tag in bytes
+
+ public function __construct() {
+ return true;
+ }
+
+ public function WriteReal() {
+ // File MUST be writeable - CHMOD(646) at least
+ if (is_writeable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'r+b'))) {
+
+ // Initialize getID3 engine
+ $getID3 = new getID3;
+ $OldThisFileInfo = $getID3->analyze($this->filename);
+ if (empty($OldThisFileInfo['real']['chunks']) && !empty($OldThisFileInfo['real']['old_ra_header'])) {
+ $this->errors[] = 'Cannot write Real tags on old-style file format';
+ fclose($fp_source);
+ return false;
+ }
+
+ if (empty($OldThisFileInfo['real']['chunks'])) {
+ $this->errors[] = 'Cannot write Real tags because cannot find DATA chunk in file';
+ fclose($fp_source);
+ return false;
+ }
+ foreach ($OldThisFileInfo['real']['chunks'] as $chunknumber => $chunkarray) {
+ $oldChunkInfo[$chunkarray['name']] = $chunkarray;
+ }
+ if (!empty($oldChunkInfo['CONT']['length'])) {
+ $this->paddedlength = max($oldChunkInfo['CONT']['length'], $this->paddedlength);
+ }
+
+ $new_CONT_tag_data = $this->GenerateCONTchunk();
+ $new_PROP_tag_data = $this->GeneratePROPchunk($OldThisFileInfo['real']['chunks'], $new_CONT_tag_data);
+ $new__RMF_tag_data = $this->GenerateRMFchunk($OldThisFileInfo['real']['chunks']);
+
+ if (isset($oldChunkInfo['.RMF']['length']) && ($oldChunkInfo['.RMF']['length'] == strlen($new__RMF_tag_data))) {
+ fseek($fp_source, $oldChunkInfo['.RMF']['offset']);
+ fwrite($fp_source, $new__RMF_tag_data);
+ } else {
+ $this->errors[] = 'new .RMF tag ('.strlen($new__RMF_tag_data).' bytes) different length than old .RMF tag ('.$oldChunkInfo['.RMF']['length'].' bytes)';
+ fclose($fp_source);
+ return false;
+ }
+
+ if (isset($oldChunkInfo['PROP']['length']) && ($oldChunkInfo['PROP']['length'] == strlen($new_PROP_tag_data))) {
+ fseek($fp_source, $oldChunkInfo['PROP']['offset']);
+ fwrite($fp_source, $new_PROP_tag_data);
+ } else {
+ $this->errors[] = 'new PROP tag ('.strlen($new_PROP_tag_data).' bytes) different length than old PROP tag ('.$oldChunkInfo['PROP']['length'].' bytes)';
+ fclose($fp_source);
+ return false;
+ }
+
+ if (isset($oldChunkInfo['CONT']['length']) && ($oldChunkInfo['CONT']['length'] == strlen($new_CONT_tag_data))) {
+
+ // new data length is same as old data length - just overwrite
+ fseek($fp_source, $oldChunkInfo['CONT']['offset']);
+ fwrite($fp_source, $new_CONT_tag_data);
+ fclose($fp_source);
+ return true;
+
+ } else {
+
+ if (empty($oldChunkInfo['CONT'])) {
+ // no existing CONT chunk
+ $BeforeOffset = $oldChunkInfo['DATA']['offset'];
+ $AfterOffset = $oldChunkInfo['DATA']['offset'];
+ } else {
+ // new data is longer than old data
+ $BeforeOffset = $oldChunkInfo['CONT']['offset'];
+ $AfterOffset = $oldChunkInfo['CONT']['offset'] + $oldChunkInfo['CONT']['length'];
+ }
+ if ($tempfilename = tempnam(GETID3_TEMP_DIR, 'getID3')) {
+ if (is_writable($tempfilename) && is_file($tempfilename) && ($fp_temp = fopen($tempfilename, 'wb'))) {
+
+ rewind($fp_source);
+ fwrite($fp_temp, fread($fp_source, $BeforeOffset));
+ fwrite($fp_temp, $new_CONT_tag_data);
+ fseek($fp_source, $AfterOffset);
+ while ($buffer = fread($fp_source, $this->fread_buffer_size)) {
+ fwrite($fp_temp, $buffer, strlen($buffer));
+ }
+ fclose($fp_temp);
+
+ if (copy($tempfilename, $this->filename)) {
+ unlink($tempfilename);
+ fclose($fp_source);
+ return true;
+ }
+ unlink($tempfilename);
+ $this->errors[] = 'FAILED: copy('.$tempfilename.', '.$this->filename.')';
+
+ } else {
+ $this->errors[] = 'Could not fopen("'.$tempfilename.'", "wb")';
+ }
+ }
+ fclose($fp_source);
+ return false;
+
+ }
+
+ }
+ $this->errors[] = 'Could not fopen("'.$this->filename.'", "r+b")';
+ return false;
+ }
+
+ public function GenerateRMFchunk(&$chunks) {
+ $oldCONTexists = false;
+ foreach ($chunks as $key => $chunk) {
+ $chunkNameKeys[$chunk['name']] = $key;
+ if ($chunk['name'] == 'CONT') {
+ $oldCONTexists = true;
+ }
+ }
+ $newHeadersCount = $chunks[$chunkNameKeys['.RMF']]['headers_count'] + ($oldCONTexists ? 0 : 1);
+
+ $RMFchunk = "\x00\x00"; // object version
+ $RMFchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['.RMF']]['file_version'], 4);
+ $RMFchunk .= getid3_lib::BigEndian2String($newHeadersCount, 4);
+
+ $RMFchunk = '.RMF'.getid3_lib::BigEndian2String(strlen($RMFchunk) + 8, 4).$RMFchunk; // .RMF chunk identifier + chunk length
+ return $RMFchunk;
+ }
+
+ public function GeneratePROPchunk(&$chunks, &$new_CONT_tag_data) {
+ $old_CONT_length = 0;
+ $old_DATA_offset = 0;
+ $old_INDX_offset = 0;
+ foreach ($chunks as $key => $chunk) {
+ $chunkNameKeys[$chunk['name']] = $key;
+ if ($chunk['name'] == 'CONT') {
+ $old_CONT_length = $chunk['length'];
+ } elseif ($chunk['name'] == 'DATA') {
+ if (!$old_DATA_offset) {
+ $old_DATA_offset = $chunk['offset'];
+ }
+ } elseif ($chunk['name'] == 'INDX') {
+ if (!$old_INDX_offset) {
+ $old_INDX_offset = $chunk['offset'];
+ }
+ }
+ }
+ $CONTdelta = strlen($new_CONT_tag_data) - $old_CONT_length;
+
+ $PROPchunk = "\x00\x00"; // object version
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['max_bit_rate'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['avg_bit_rate'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['max_packet_size'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['avg_packet_size'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['num_packets'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['duration'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['preroll'], 4);
+ $PROPchunk .= getid3_lib::BigEndian2String(max(0, $old_INDX_offset + $CONTdelta), 4);
+ $PROPchunk .= getid3_lib::BigEndian2String(max(0, $old_DATA_offset + $CONTdelta), 4);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['num_streams'], 2);
+ $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['flags_raw'], 2);
+
+ $PROPchunk = 'PROP'.getid3_lib::BigEndian2String(strlen($PROPchunk) + 8, 4).$PROPchunk; // PROP chunk identifier + chunk length
+ return $PROPchunk;
+ }
+
+ public function GenerateCONTchunk() {
+ foreach ($this->tag_data as $key => $value) {
+ // limit each value to 0xFFFF bytes
+ $this->tag_data[$key] = substr($value, 0, 65535);
+ }
+
+ $CONTchunk = "\x00\x00"; // object version
+
+ $CONTchunk .= getid3_lib::BigEndian2String((!empty($this->tag_data['title']) ? strlen($this->tag_data['title']) : 0), 2);
+ $CONTchunk .= (!empty($this->tag_data['title']) ? strlen($this->tag_data['title']) : '');
+
+ $CONTchunk .= getid3_lib::BigEndian2String((!empty($this->tag_data['artist']) ? strlen($this->tag_data['artist']) : 0), 2);
+ $CONTchunk .= (!empty($this->tag_data['artist']) ? strlen($this->tag_data['artist']) : '');
+
+ $CONTchunk .= getid3_lib::BigEndian2String((!empty($this->tag_data['copyright']) ? strlen($this->tag_data['copyright']) : 0), 2);
+ $CONTchunk .= (!empty($this->tag_data['copyright']) ? strlen($this->tag_data['copyright']) : '');
+
+ $CONTchunk .= getid3_lib::BigEndian2String((!empty($this->tag_data['comment']) ? strlen($this->tag_data['comment']) : 0), 2);
+ $CONTchunk .= (!empty($this->tag_data['comment']) ? strlen($this->tag_data['comment']) : '');
+
+ if ($this->paddedlength > (strlen($CONTchunk) + 8)) {
+ $CONTchunk .= str_repeat("\x00", $this->paddedlength - strlen($CONTchunk) - 8);
+ }
+
+ $CONTchunk = 'CONT'.getid3_lib::BigEndian2String(strlen($CONTchunk) + 8, 4).$CONTchunk; // CONT chunk identifier + chunk length
+
+ return $CONTchunk;
+ }
+
+ public function RemoveReal() {
+ // File MUST be writeable - CHMOD(646) at least
+ if (is_writeable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'r+b'))) {
+
+ // Initialize getID3 engine
+ $getID3 = new getID3;
+ $OldThisFileInfo = $getID3->analyze($this->filename);
+ if (empty($OldThisFileInfo['real']['chunks']) && !empty($OldThisFileInfo['real']['old_ra_header'])) {
+ $this->errors[] = 'Cannot remove Real tags from old-style file format';
+ fclose($fp_source);
+ return false;
+ }
+
+ if (empty($OldThisFileInfo['real']['chunks'])) {
+ $this->errors[] = 'Cannot remove Real tags because cannot find DATA chunk in file';
+ fclose($fp_source);
+ return false;
+ }
+ foreach ($OldThisFileInfo['real']['chunks'] as $chunknumber => $chunkarray) {
+ $oldChunkInfo[$chunkarray['name']] = $chunkarray;
+ }
+
+ if (empty($oldChunkInfo['CONT'])) {
+ // no existing CONT chunk
+ fclose($fp_source);
+ return true;
+ }
+
+ $BeforeOffset = $oldChunkInfo['CONT']['offset'];
+ $AfterOffset = $oldChunkInfo['CONT']['offset'] + $oldChunkInfo['CONT']['length'];
+ if ($tempfilename = tempnam(GETID3_TEMP_DIR, 'getID3')) {
+ if (is_writable($tempfilename) && is_file($tempfilename) && ($fp_temp = fopen($tempfilename, 'wb'))) {
+
+ rewind($fp_source);
+ fwrite($fp_temp, fread($fp_source, $BeforeOffset));
+ fseek($fp_source, $AfterOffset);
+ while ($buffer = fread($fp_source, $this->fread_buffer_size)) {
+ fwrite($fp_temp, $buffer, strlen($buffer));
+ }
+ fclose($fp_temp);
+
+ if (copy($tempfilename, $this->filename)) {
+ unlink($tempfilename);
+ fclose($fp_source);
+ return true;
+ }
+ unlink($tempfilename);
+ $this->errors[] = 'FAILED: copy('.$tempfilename.', '.$this->filename.')';
+
+ } else {
+ $this->errors[] = 'Could not fopen("'.$tempfilename.'", "wb")';
+ }
+ }
+ fclose($fp_source);
+ return false;
+ }
+ $this->errors[] = 'Could not fopen("'.$this->filename.'", "r+b")';
+ return false;
+ }
+
+}
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