getid3_matroska::HandleEMBLClusterBlock() –
You appear to be a bot. Output may be restricted
Description
Usage
$array = getid3_matroska::HandleEMBLClusterBlock( $element, $block_type, $info );
Parameters
- $element
- ( array ) required –
- $block_type
- ( int ) required –
- $info
- ( array ) required –
Returns
array
Source
File name: wordpress/wp-includes/ID3/module.audio-video.matroska.php
Lines:
1 to 62 of 62
private function HandleEMBLClusterBlock($element, $block_type, &$info) { // http://www.matroska.org/technical/specs/index.html#block_structure // http://www.matroska.org/technical/specs/index.html#simpleblock_structure $block_data = array(); $block_data['tracknumber'] = $this->getid3_matroska::readEBMLint(); $block_data['timecode'] = getid3_lib::BigEndian2Int($this->getid3_matroska::readEBMLelementData(2), false, true); $block_data['flags_raw'] = getid3_lib::BigEndian2Int($this->getid3_matroska::readEBMLelementData(1)); if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) { $block_data['flags']['keyframe'] = (($block_data['flags_raw'] & 0x80) >> 7); //$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0x70) >> 4); } else { //$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0xF0) >> 4); } $block_data['flags']['invisible'] = (bool)(($block_data['flags_raw'] & 0x08) >> 3); $block_data['flags']['lacing'] = (($block_data['flags_raw'] & 0x06) >> 1); // 00=no lacing; 01=Xiph lacing; 11=EBML lacing; 10=fixed-size lacing if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) { $block_data['flags']['discardable'] = (($block_data['flags_raw'] & 0x01)); } else { //$block_data['flags']['reserved2'] = (($block_data['flags_raw'] & 0x01) >> 0); } $block_data['flags']['lacing_type'] = self::BlockLacingType($block_data['flags']['lacing']); // Lace (when lacing bit is set) if ($block_data['flags']['lacing'] > 0) { $block_data['lace_frames'] = getid3_lib::BigEndian2Int($this->getid3_matroska::readEBMLelementData(1)) + 1; // Number of frames in the lace-1 (uint8) if ($block_data['flags']['lacing'] != 0x02) { for ($i = 1; $i < $block_data['lace_frames']; $i ++) { // Lace-coded size of each frame of the lace, except for the last one (multiple uint8). *This is not used with Fixed-size lacing as it is calculated automatically from (total size of lace) / (number of frames in lace). if ($block_data['flags']['lacing'] == 0x03) { // EBML lacing $block_data['lace_frames_size'][$i] = $this->getid3_matroska::readEBMLint(); // TODO: read size correctly, calc size for the last frame. For now offsets are deteminded OK with readEBMLint() and that's the most important thing. } else { // Xiph lacing $block_data['lace_frames_size'][$i] = 0; do { $size = getid3_lib::BigEndian2Int($this->getid3_matroska::readEBMLelementData(1)); $block_data['lace_frames_size'][$i] += $size; } while ($size == 255); } } if ($block_data['flags']['lacing'] == 0x01) { // calc size of the last frame only for Xiph lacing, till EBML sizes are now anyway determined incorrectly $block_data['lace_frames_size'][] = $element['end'] - $this->current_offset - array_sum($block_data['lace_frames_size']); } } } if (!isset($info['matroska']['track_data_offsets'][$block_data['tracknumber']])) { $info['matroska']['track_data_offsets'][$block_data['tracknumber']]['offset'] = $this->current_offset; $info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length'] = $element['end'] - $this->current_offset; //$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] = 0; } //$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] += $info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length']; //$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['duration'] = $block_data['timecode'] * ((isset($info['matroska']['info'][0]['TimecodeScale']) ? $info['matroska']['info'][0]['TimecodeScale'] : 1000000) / 1000000000); // set offset manually $this->current_offset = $element['end']; return $block_data; }