/**
* Constructs the class with given parameters and reads object related data
* from the bitstream.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$flags = $reader->readUInt32BE();
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x1)) {
$this->_frames = $this->_reader->readUInt32BE();
}
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x2)) {
$this->_bytes = $this->_reader->readUInt32BE();
}
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x4)) {
$this->_toc = array_merge(unpack('C*', $this->_reader->read(100)));
}
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x8)) {
$this->_qualityIndicator = $this->_reader->readUInt32BE();
}
}
/**
* Constructs the class with given parameters and reads object related data
* from the bitstream.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$offset = $this->_reader->getOffset();
$this->_version = $this->_reader->readUInt16BE();
$this->_delay = $this->_reader->readUInt16BE();
$this->_qualityIndicator = $this->_reader->readUInt16BE();
$this->_bytes = $this->_reader->readUInt32BE();
$this->_frames = $this->_reader->readUInt32BE();
$tocEntries = $this->_reader->readUInt16BE();
$tocEntryScale = $this->_reader->readUInt16BE();
$tocEntrySize = $this->_reader->readUInt16BE();
$this->_tocFramesPerEntry = $this->_reader->readUInt16BE();
$this->_toc = array_merge(unpack($tocEntrySize == 1 ? 'C*' : $tocEntrySize == 2 ? 'n*' : 'N*', $this->_reader->read($tocCount * $tocEntrySize)));
foreach ($this->_toc as $key => $value) {
$this->_toc[$key] = $tocEntryScale * $value;
}
$this->_length = $this->_reader->getOffset() - $offset;
}
/**
* Constructs the class with given parameters and reads object related data
* from the frame.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$this->_offset = $this->_reader->getOffset();
$header = $this->_reader->readUInt32BE();
$this->_version = Zend_Bit_Twiddling::getValue($header, 19, 20);
$this->_frequencyType = Zend_Bit_Twiddling::testBit($header, 19);
$this->_layer = Zend_Bit_Twiddling::getValue($header, 17, 18);
$this->_redundancy = !Zend_Bit_Twiddling::testBit($header, 16);
$this->_bitrate = isset(self::$bitrates[$this->_frequencyType][$this->_layer][$index = Zend_Bit_Twiddling::getValue($header, 12, 15)]) ? self::$bitrates[$this->_frequencyType][$this->_layer][$index] : false;
$this->_samplingFrequency = isset(self::$samplingFrequencies[$this->_version][$index = Zend_Bit_Twiddling::getValue($header, 10, 11)]) ? self::$samplingFrequencies[$this->_version][$index] : false;
$this->_padding = Zend_Bit_Twiddling::testBit($header, 9);
$this->_mode = Zend_Bit_Twiddling::getValue($header, 6, 7);
$this->_modeExtension = Zend_Bit_Twiddling::getValue($header, 4, 5);
$this->_copyright = Zend_Bit_Twiddling::testBit($header, 3);
$this->_original = Zend_Bit_Twiddling::testBit($header, 2);
$this->_emphasis = Zend_Bit_Twiddling::getValue($header, 0, 1);
$this->_length = (int) (self::$coefficients[$this->_frequencyType][$this->_layer] * ($this->_bitrate * 1000) / $this->_samplingFrequency + ($this->_padding ? 1 : 0)) * self::$slotsizes[$this->_layer];
$this->_samples = self::$samples[$this->_frequencyType][$this->_layer];
if ($this->getOption('readmode', 'lazy') == 'full') {
$this->_readCrc();
$this->_readData();
}
$this->_reader->skip($this->_length - 4);
}
/**
* Constructs the class with given parameters and reads object related data
* from the frame.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$this->_offset = $this->_reader->getOffset();
$header = $this->_reader->readUInt32BE();
if (!Zend_Bit_Twiddling::testAllBits(Zend_Bit_Twiddling::getValue($header, 21, 32), 0xffe)) {
require_once 'Zend/Media/Mpeg/Exception.php';
throw new Zend_Media_Mpeg_Exception('File does not contain a valid MPEG Audio Bit Stream (Invalid frame sync)');
}
$this->_version = Zend_Bit_Twiddling::getValue($header, 19, 20);
$this->_frequencyType = Zend_Bit_Twiddling::testBit($header, 19);
$this->_layer = Zend_Bit_Twiddling::getValue($header, 17, 18);
$this->_redundancy = !Zend_Bit_Twiddling::testBit($header, 16);
$this->_bitrate = isset(self::$bitrates[$this->_frequencyType][$this->_layer][$index = Zend_Bit_Twiddling::getValue($header, 12, 15)]) ? self::$bitrates[$this->_frequencyType][$this->_layer][$index] : false;
$this->_samplingFrequency = isset(self::$samplingFrequencies[$this->_version][$index = Zend_Bit_Twiddling::getValue($header, 10, 11)]) ? self::$samplingFrequencies[$this->_version][$index] : false;
$this->_padding = Zend_Bit_Twiddling::testBit($header, 9);
$this->_mode = Zend_Bit_Twiddling::getValue($header, 6, 7);
$this->_modeExtension = Zend_Bit_Twiddling::getValue($header, 4, 5);
$this->_copyright = Zend_Bit_Twiddling::testBit($header, 3);
$this->_original = Zend_Bit_Twiddling::testBit($header, 2);
$this->_emphasis = Zend_Bit_Twiddling::getValue($header, 0, 1);
$this->_length = (int) (self::$coefficients[$this->_frequencyType][$this->_layer] * ($this->_bitrate * 1000) / $this->_samplingFrequency + ($this->_padding ? 1 : 0)) * self::$slotsizes[$this->_layer];
$this->_samples = self::$samples[$this->_frequencyType][$this->_layer];
if ($this->getOption('readmode', 'lazy') == 'full') {
$this->_readCrc();
$this->_readData();
}
$this->_reader->skip($this->_length - 4);
}
/**
* Constructs the class with given parameters and reads object related data
* from the bitstream.
*
* @param Zend_Io_Reader $reader The reader object.
* @param Array $options Array of options.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$this->_version = $this->_reader->readString8(5);
$tmp = $this->_reader->readUInt8();
$this->_revision = Zend_Bit_Twiddling::getValue($tmp, 4, 8);
$this->_vbrMethod = Zend_Bit_Twiddling::getValue($tmp, 0, 3);
$this->_lowpass = $this->_reader->readUInt8() * 100;
$this->_peakSignalAmplitude = $this->_reader->readUInt32BE();
$tmp = $this->_reader->readUInt16BE();
$this->_radioReplayGain = array('name' => Zend_Bit_Twiddling::getValue($tmp, 0, 2), 'originator' => Zend_Bit_Twiddling::getValue($tmp, 3, 5), 'absoluteGainAdjustment' => Zend_Bit_Twiddling::getValue($tmp, 7, 15) / 10);
$tmp = $this->_reader->readUInt16BE();
$this->_audiophileReplayGain = array('name' => Zend_Bit_Twiddling::getValue($tmp, 0, 2), 'originator' => Zend_Bit_Twiddling::getValue($tmp, 3, 5), 'absoluteGainAdjustment' => Zend_Bit_Twiddling::getValue($tmp, 7, 15) / 10);
$tmp = $this->_reader->readUInt8();
$this->_encodingFlags = Zend_Bit_Twiddling::getValue($tmp, 4, 8);
$this->_athType = Zend_Bit_Twiddling::getValue($tmp, 0, 3);
$this->_bitrate = $this->_reader->readUInt8();
$tmp = $this->_reader->readUInt32BE();
// Encoder delay fields
$this->_encoderDelaySamples = Zend_Bit_Twiddling::getValue($tmp, 20, 31);
$this->_paddedSamples = Zend_Bit_Twiddling::getValue($tmp, 8, 19);
// Misc field
$this->_sourceSampleFrequency = Zend_Bit_Twiddling::getValue($tmp, 6, 7);
$this->_unwiseSettingsUsed = Zend_Bit_Twiddling::testBit($tmp, 5);
$this->_mode = Zend_Bit_Twiddling::getValue($tmp, 2, 4);
$this->_noiseShaping = Zend_Bit_Twiddling::getValue($tmp, 0, 1);
$this->_mp3Gain = pow(2, $this->_reader->readInt8() / 4);
$tmp = $this->_reader->readUInt16BE();
$this->_surroundInfo = Zend_Bit_Twiddling::getValue($tmp, 11, 14);
$this->_presetUsed = Zend_Bit_Twiddling::getValue($tmp, 0, 10);
$this->_musicLength = $this->_reader->readUInt32BE();
$this->_musicCrc = $this->_reader->readUInt16BE();
$this->_crc = $this->_reader->readUInt16BE();
}
