mbirth/php-mp3info
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Fix isValidAudio()

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Signed-off-by: Markus Birth <markus@birth-online.de>
This commit is contained in:
Markus Birth 2024-05-27 13:49:41 +01:00
parent 120617847c
commit 48edb42c1e
1 changed files with 25 additions and 11 deletions
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36
src/Mp3Info.php
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@ -1021,19 +1021,33 @@ class Mp3Info {
* @throws \Exception
*/
public static function isValidAudio($filename) {
if (!file_exists($filename) && strpos($filename, '://') == false) {
throw new Exception('File ' . $filename . ' is not present!');
if (str_contains($filename, '://')) {
$fileObj = new Mp3FileRemote($filename);
} else {
if (!file_exists($filename)) {
throw new Exception('File ' . $filename . ' is not present!');
}
$fileObj = new Mp3FileLocal($filename);
}
$filesize = file_exists($filename) ? filesize($filename) : static::getUrlContentLength($filename);
$filesize = $fileObj->getFileSize();
$raw = file_get_contents($filename, false, null, 0, 3);
return $raw === self::TAG2_SYNC // id3v2 tag
|| (self::FRAME_SYNC === (unpack('n*', $raw)[1] & self::FRAME_SYNC)) // mpeg header tag
|| (
$filesize > 128
&& file_get_contents($filename, false, null, -128, 3) === self::TAG1_SYNC
) // id3v1 tag
;
$raw = $fileObj->getBytes(3);
if ($raw === self::TAG2_SYNC) {
// id3v2 tag
return true;
}
if (self::FRAME_SYNC === (unpack('n*', $raw)[1] & self::FRAME_SYNC)) {
// mpeg header tag
return true;
}
if ($filesize > 128) {
$fileObj->seekTo($filesize - 128);
if ($fileObj->getBytes(3) === self::TAG1_SYNC) {
// id3v1 tag
return true;
}
}
return false;
}
}