/**
* @param string $filename path to wav-file
*
* @return AudioFile
* @throws FileIsNotExistsException
* @throws FileIsNotReadableException
* @throws FileIsNotWavFileException
*/
public static function fromFile($filename)
{
if (!file_exists($filename)) {
throw new FileIsNotExistsException('File "' . $filename . '" is not exists.');
}
if (!is_readable($filename)) {
throw new FileIsNotReadableException('File "' . $filename . '" is not readable"');
}
if (is_dir($filename)) {
throw new FileIsNotWavFileException('File "' . $filename . '" is not a wav-file');
}
$size = filesize($filename);
if ($size < AudioFile::HEADER_LENGTH) {
throw new FileIsNotWavFileException('File "' . $filename . '" is not a wav-file');
}
$handle = fopen($filename, 'rb');
try {
$header = Header::createFromArray(self::parseHeader($handle));
$formatSection = FormatSection::createFromArray(self::parseFormatSection($handle));
$dataSection = DataSection::createFromArray(self::parseDataSection($handle));
} finally {
fclose($handle);
}
return new AudioFile($header, $formatSection, $dataSection);
}
