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getid3_write_real Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

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Public Member Functions

 getid3_write_real ()
 WriteReal ()
 GenerateRMFchunk (&$chunks)
 GeneratePROPchunk (&$chunks, &$new_CONT_tag_data)
 GenerateCONTchunk ()
 RemoveReal ()

Data Fields

 $filename
 $tag_data = array()
 $warnings = array()
 $errors = array()
 $paddedlength = 512

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 16 of file write.real.php.

Member Function Documentation

getid3_write_real::GenerateCONTchunk ( )

Definition at line 193 of file write.real.php.

References getid3_lib\BigEndian2String().

Referenced by WriteReal().

{
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
$CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['title']), 2);
$CONTchunk .= @$this->tag_data['title'];
$CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['artist']), 2);
$CONTchunk .= @$this->tag_data['artist'];
$CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['copyright']), 2);
$CONTchunk .= @$this->tag_data['copyright'];
$CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['comment']), 2);
$CONTchunk .= @$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;
}

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getid3_write_real::GeneratePROPchunk ( &  $chunks,
&  $new_CONT_tag_data 
)

Definition at line 156 of file write.real.php.

References getid3_lib\BigEndian2String().

Referenced by WriteReal().

{
$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;
}

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getid3_write_real::GenerateRMFchunk ( &  $chunks)

Definition at line 138 of file write.real.php.

References getid3_lib\BigEndian2String().

Referenced by WriteReal().

{
$oldCONTexists = false;
foreach ($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;
}

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getid3_write_real::getid3_write_real ( )

Definition at line 24 of file write.real.php.

{
return true;
}
getid3_write_real::RemoveReal ( )

Definition at line 222 of file write.real.php.

References getID3\analyze(), and GETID3_FREAD_BUFFER_SIZE.

{
// File MUST be writeable - CHMOD(646) at least
if (is_writeable($this->filename)) {
if ($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')) {
ob_start();
if ($fp_temp = fopen($tempfilename, 'wb')) {
rewind($fp_source);
fwrite($fp_temp, fread($fp_source, $BeforeOffset));
fseek($fp_source, $AfterOffset, SEEK_SET);
while ($buffer = fread($fp_source, GETID3_FREAD_BUFFER_SIZE)) {
fwrite($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.') - '.strip_tags(ob_get_contents());
} else {
$this->errors[] = 'Could not open '.$tempfilename.' mode "wb" - '.strip_tags(ob_get_contents());
}
ob_end_clean();
}
fclose($fp_source);
return false;
} else {
$this->errors[] = 'Could not open '.$this->filename.' mode "r+b"';
return false;
}
}
$this->errors[] = 'File is not writeable: '.$this->filename;
return false;
}

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getid3_write_real::WriteReal ( )

Definition at line 28 of file write.real.php.

References getID3\analyze(), GenerateCONTchunk(), GeneratePROPchunk(), GenerateRMFchunk(), and GETID3_FREAD_BUFFER_SIZE.

{
// File MUST be writeable - CHMOD(646) at least
if (is_writeable($this->filename)) {
if ($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 (@$oldChunkInfo['.RMF']['length'] == strlen($new__RMF_tag_data)) {
fseek($fp_source, $oldChunkInfo['.RMF']['offset'], SEEK_SET);
fwrite($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 (@$oldChunkInfo['PROP']['length'] == strlen($new_PROP_tag_data)) {
fseek($fp_source, $oldChunkInfo['PROP']['offset'], SEEK_SET);
fwrite($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 (@$oldChunkInfo['CONT']['length'] == strlen($new_CONT_tag_data)) {
// new data length is same as old data length - just overwrite
fseek($fp_source, $oldChunkInfo['CONT']['offset'], SEEK_SET);
fwrite($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')) {
ob_start();
if ($fp_temp = fopen($tempfilename, 'wb')) {
rewind($fp_source);
fwrite($fp_temp, fread($fp_source, $BeforeOffset));
fwrite($fp_temp, $new_CONT_tag_data);
fseek($fp_source, $AfterOffset, SEEK_SET);
while ($buffer = fread($fp_source, GETID3_FREAD_BUFFER_SIZE)) {
fwrite($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.') - '.strip_tags(ob_get_contents());
} else {
$this->errors[] = 'Could not open '.$tempfilename.' mode "wb" - '.strip_tags(ob_get_contents());
}
ob_end_clean();
}
fclose($fp_source);
return false;
}
} else {
$this->errors[] = 'Could not open '.$this->filename.' mode "r+b"';
return false;
}
}
$this->errors[] = 'File is not writeable: '.$this->filename;
return false;
}

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Field Documentation

getid3_write_real::$errors = array()

Definition at line 21 of file write.real.php.

getid3_write_real::$filename

Definition at line 18 of file write.real.php.

getid3_write_real::$paddedlength = 512

Definition at line 22 of file write.real.php.

getid3_write_real::$tag_data = array()

Definition at line 19 of file write.real.php.

getid3_write_real::$warnings = array()

Definition at line 20 of file write.real.php.

The documentation for this class was generated from the following file: