mbirth/php-mp3info
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update mp3scan & update seeking for mpeg header

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This commit is contained in:
wapmorgan
2019-12-03 03:35:40 +03:00
parent fd4a4ed97d
commit 89fac15d4f
2 changed files with 14 additions and 8 deletions
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16
src/Mp3Info.php
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@ -304,16 +304,22 @@ class Mp3Info {
$header_seek_pos = ftell($fp) + self::$headerSeekLimit;
do {
$pos = ftell($fp);
$first_header_byte = $this->readBytes($fp, 4);
$first_header_byte = $this->readBytes($fp, 1);
if ($first_header_byte[0] === 0xFF) {
fseek($fp, $pos);
$header_bytes = $this->readBytes($fp, 4);
break;
$second_header_byte = $this->readBytes($fp, 1);
if ((($second_header_byte[0] >> 5) & 0b111) == 0b111) {
fseek($fp, $pos);
$header_bytes = $this->readBytes($fp, 4);
break;
}
}
fseek($fp, 1, SEEK_CUR);
} while (ftell($fp) <= $header_seek_pos);
if ($header_bytes[0] !== 0xFF || (($header_bytes[1] >> 5) & 0b111) != 0b111) throw new \Exception("At ".$pos."(0x".dechex($pos).") should be a frame header!");
if (!isset($header_bytes) || $header_bytes[0] !== 0xFF || (($header_bytes[1] >> 5) & 0b111) != 0b111) {
throw new \Exception('At '.$pos
.'(0x'.dechex($pos).') should be a frame header!');
}
switch ($header_bytes[1] >> 3 & 0b11) {
case 0b00: $this->codecVersion = self::MPEG_25; break;