/**
* @param string $filename
* @return Yamdi_InputStream
*/
protected function read($filename)
{
$this->sourceFilename = $filename;
/*
* File to read
*/
$stream = new Yamdi_InputStream($this->sourceFilename);
/*
* Constant header
*/
$this->header->read($stream);
if (!$this->header->isValid()) {
throw new Exception('File ' . $this->sourceFilename . ' is not of flv format');
}
/*
* Constant size of zero tag
*/
$this->zeroTagSize->read($stream);
// $this->zeroTagSize->size should be zero
/*
* First tag (meta)
*/
$this->metadataTag->read($stream);
if (!$this->metadataTag->isMeta()) {
throw new Exception('No metadata tag found if file ' . $this->sourceFilename);
}
$tagBodyString = $this->metadataTag->readTagBody($stream);
$this->metadataTagBodyLenghth = strlen($tagBodyString);
$this->metadata->read($tagBodyString);
/*
* Previous tag size
*/
$this->metadataTagSize->read($stream);
$this->sourceMediaTagsStartPosition = $stream->getPosition();
return $stream;
}
/**
* @deprecated
*/
public function testMetadataWriteback()
{
/*
* File to read
*/
$stream = new Yamdi_InputStream(dirname(__FILE__) . '/../trailer_2.flv');
/*
* Constant header
*/
$header = new Yamdi_FlvFileHeader();
$header->read($stream);
$this->assertEqual(true, $header->isValid());
/*
* Constant size of zero tag
*/
$zeroTagSize = new Yamdi_FlvTagSize();
$zeroTagSize->read($stream);
$this->assertEqual(0, $zeroTagSize->size);
// allways 0
/*
* First tag (should be meta)
*/
$tag = new Yamdi_FlvTag();
$tag->read($stream);
$this->assertTrue($tag->isMeta());
$metadata = new Yamdi_FlvMetadataBody();
$tagBody = $tag->readTagBody($stream);
$metadata->read($tagBody);
$this->assertEqual(strlen($tagBody), strlen($metadata->write()));
/*
* Cleanup
*/
$stream->close();
}