/** * Constructs the class with given parameters and reads object related data * from the bitstream. * * @param HausDesign_Io_Reader $reader The reader object. * @param Array $options Array of options. */ public function __construct($reader, &$options = array()) { parent::__construct($reader, $options); $flags = $reader->readUInt32BE(); if (HausDesign_Bit_Twiddling::testAnyBits($flags, 0x1)) { $this->_frames = $this->_reader->readUInt32BE(); } if (HausDesign_Bit_Twiddling::testAnyBits($flags, 0x2)) { $this->_bytes = $this->_reader->readUInt32BE(); } if (HausDesign_Bit_Twiddling::testAnyBits($flags, 0x4)) { $this->_toc = array_merge(unpack('C*', $this->_reader->read(100))); } if (HausDesign_Bit_Twiddling::testAnyBits($flags, 0x8)) { $this->_qualityIndicator = $this->_reader->readUInt32BE(); } }
/** * Constructs the class with given parameters and reads object related data * from the bitstream. * * @param HausDesign_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 HausDesign_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(); $header = null; for ($i = 0; $i < 5775; $i++) { $header = $this->_reader->readUInt32BE(); if (HausDesign_Bit_Twiddling::testAllBits(HausDesign_Bit_Twiddling::getValue($header, 21, 32), 0xffe)) { break; } $this->_reader->setOffset(++$this->_offset + 1); if ($this->_offset == $this->_reader->getSize() || $i == 5775 - 1) { require_once 'HausDesign/Media/Mpeg/Exception.php'; throw new HausDesign_Media_Mpeg_Exception('File does not contain a valid MPEG Audio Bit Stream (Invalid frame sync and resynchronization failed)'); } } $this->_version = HausDesign_Bit_Twiddling::getValue($header, 19, 20); $this->_frequencyType = HausDesign_Bit_Twiddling::testBit($header, 19); $this->_layer = HausDesign_Bit_Twiddling::getValue($header, 17, 18); $this->_redundancy = !HausDesign_Bit_Twiddling::testBit($header, 16); $this->_bitrate = isset(self::$bitrates[$this->_frequencyType][$this->_layer][$index = HausDesign_Bit_Twiddling::getValue($header, 12, 15)]) ? self::$bitrates[$this->_frequencyType][$this->_layer][$index] : false; $this->_samplingFrequency = isset(self::$samplingFrequencies[$this->_version][$index = HausDesign_Bit_Twiddling::getValue($header, 10, 11)]) ? self::$samplingFrequencies[$this->_version][$index] : false; $this->_padding = HausDesign_Bit_Twiddling::testBit($header, 9); $this->_mode = HausDesign_Bit_Twiddling::getValue($header, 6, 7); $this->_modeExtension = HausDesign_Bit_Twiddling::getValue($header, 4, 5); $this->_copyright = HausDesign_Bit_Twiddling::testBit($header, 3); $this->_original = HausDesign_Bit_Twiddling::testBit($header, 2); $this->_emphasis = HausDesign_Bit_Twiddling::getValue($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 HausDesign_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(); $this->_revision = HausDesign_Bit_Twiddling::getValue($tmp, 4, 8); $this->_vbrMethod = HausDesign_Bit_Twiddling::getValue($tmp, 0, 3); $this->_lowpass = $this->_reader->readUInt8() * 100; $this->_peakSignalAmplitude = $this->_reader->readUInt32BE(); $tmp = $this->_reader->readUInt16BE(); $this->_radioReplayGain = array('name' => HausDesign_Bit_Twiddling::getValue($tmp, 0, 2), 'originator' => HausDesign_Bit_Twiddling::getValue($tmp, 3, 5), 'absoluteGainAdjustment' => HausDesign_Bit_Twiddling::getValue($tmp, 7, 15) / 10); $tmp = $this->_reader->readUInt16BE(); $this->_audiophileReplayGain = array('name' => HausDesign_Bit_Twiddling::getValue($tmp, 0, 2), 'originator' => HausDesign_Bit_Twiddling::getValue($tmp, 3, 5), 'absoluteGainAdjustment' => HausDesign_Bit_Twiddling::getValue($tmp, 7, 15) / 10); $tmp = $this->_reader->readUInt8(); $this->_encodingFlags = HausDesign_Bit_Twiddling::getValue($tmp, 4, 8); $this->_athType = HausDesign_Bit_Twiddling::getValue($tmp, 0, 3); $this->_bitrate = $this->_reader->readUInt8(); $tmp = $this->_reader->readUInt32BE(); // Encoder delay fields $this->_encoderDelaySamples = HausDesign_Bit_Twiddling::getValue($tmp, 20, 31); $this->_paddedSamples = HausDesign_Bit_Twiddling::getValue($tmp, 8, 19); // Misc field $this->_sourceSampleFrequency = HausDesign_Bit_Twiddling::getValue($tmp, 6, 7); $this->_unwiseSettingsUsed = HausDesign_Bit_Twiddling::testBit($tmp, 5); $this->_mode = HausDesign_Bit_Twiddling::getValue($tmp, 2, 4); $this->_noiseShaping = HausDesign_Bit_Twiddling::getValue($tmp, 0, 1); $this->_mp3Gain = pow(2, $this->_reader->readInt8() / 4); $tmp = $this->_reader->readUInt16BE(); $this->_surroundInfo = HausDesign_Bit_Twiddling::getValue($tmp, 11, 14); $this->_presetUsed = HausDesign_Bit_Twiddling::getValue($tmp, 0, 10); $this->_musicLength = $this->_reader->readUInt32BE(); $this->_musicCrc = $this->_reader->readUInt16BE(); $this->_crc = $this->_reader->readUInt16BE(); }