getid3_matroska::HandleEMBLClusterBlock

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Private Access Private Access

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Syntax Syntax

getid3_matroska::HandleEMBLClusterBlock( array $element, int $block_type, array $info )

Parameters Parameters

$element

(array) (Required)

$block_type

(int) (Required)

$info

(array) (Required)

Return Return

(array)

Source Source

File: wp-includes/ID3/module.audio-video.matroska.php

				case EBML_ID_TAGSTRING:
				case EBML_ID_TAGBINARY:
					$simpletag_entry[$element['id_name']] = $element['data'];
					break;

				case EBML_ID_SIMPLETAG:
					$simpletag_entry[$element['id_name']][] = $this->HandleEMBLSimpleTag($element['end']);
					break;

				case EBML_ID_TAGDEFAULT:
					$simpletag_entry[$element['id_name']] = (bool)getid3_lib::BigEndian2Int($element['data']);
					break;

				default:
					$this->unhandledElement('tag.simpletag', __LINE__, $element);
					break;
			}
		}

		return $simpletag_entry;
	}

	/**
	 * @param array $element
	 * @param int   $block_type
	 * @param array $info
	 *
	 * @return array
	 */
	private function HandleEMBLClusterBlock($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->readEBMLint();
		$block_data['timecode']    = getid3_lib::BigEndian2Int($this->readEBMLelementData(2), false, true);
		$block_data['flags_raw']   = getid3_lib::BigEndian2Int($this->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->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->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.

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