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Diffstat (limited to 'srcs/wordpress/wp-includes/ID3/module.audio-video.flv.php')
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diff --git a/srcs/wordpress/wp-includes/ID3/module.audio-video.flv.php b/srcs/wordpress/wp-includes/ID3/module.audio-video.flv.php
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--- a/srcs/wordpress/wp-includes/ID3/module.audio-video.flv.php
+++ /dev/null
@@ -1,906 +0,0 @@
-<?php
-/////////////////////////////////////////////////////////////////
-/// getID3() by James Heinrich <info@getid3.org> //
-// available at https://github.com/JamesHeinrich/getID3 //
-// or https://www.getid3.org //
-// or http://getid3.sourceforge.net //
-// see readme.txt for more details //
-/////////////////////////////////////////////////////////////////
-// //
-// module.audio-video.flv.php //
-// module for analyzing Shockwave Flash Video files //
-// dependencies: NONE //
-// //
-/////////////////////////////////////////////////////////////////
-// //
-// FLV module by Seth Kaufman <sethØwhirl-i-gig*com> //
-// //
-// * version 0.1 (26 June 2005) //
-// //
-// * version 0.1.1 (15 July 2005) //
-// minor modifications by James Heinrich <info@getid3.org> //
-// //
-// * version 0.2 (22 February 2006) //
-// Support for On2 VP6 codec and meta information //
-// by Steve Webster <steve.websterØfeaturecreep*com> //
-// //
-// * version 0.3 (15 June 2006) //
-// Modified to not read entire file into memory //
-// by James Heinrich <info@getid3.org> //
-// //
-// * version 0.4 (07 December 2007) //
-// Bugfixes for incorrectly parsed FLV dimensions //
-// and incorrect parsing of onMetaTag //
-// by Evgeny Moysevich <moysevichØgmail*com> //
-// //
-// * version 0.5 (21 May 2009) //
-// Fixed parsing of audio tags and added additional codec //
-// details. The duration is now read from onMetaTag (if //
-// exists), rather than parsing whole file //
-// by Nigel Barnes <ngbarnesØhotmail*com> //
-// //
-// * version 0.6 (24 May 2009) //
-// Better parsing of files with h264 video //
-// by Evgeny Moysevich <moysevichØgmail*com> //
-// //
-// * version 0.6.1 (30 May 2011) //
-// prevent infinite loops in expGolombUe() //
-// //
-// * version 0.7.0 (16 Jul 2013) //
-// handle GETID3_FLV_VIDEO_VP6FLV_ALPHA //
-// improved AVCSequenceParameterSetReader::readData() //
-// by Xander Schouwerwou <schouwerwouØgmail*com> //
-// ///
-/////////////////////////////////////////////////////////////////
-
-define('GETID3_FLV_TAG_AUDIO', 8);
-define('GETID3_FLV_TAG_VIDEO', 9);
-define('GETID3_FLV_TAG_META', 18);
-
-define('GETID3_FLV_VIDEO_H263', 2);
-define('GETID3_FLV_VIDEO_SCREEN', 3);
-define('GETID3_FLV_VIDEO_VP6FLV', 4);
-define('GETID3_FLV_VIDEO_VP6FLV_ALPHA', 5);
-define('GETID3_FLV_VIDEO_SCREENV2', 6);
-define('GETID3_FLV_VIDEO_H264', 7);
-
-define('H264_AVC_SEQUENCE_HEADER', 0);
-define('H264_PROFILE_BASELINE', 66);
-define('H264_PROFILE_MAIN', 77);
-define('H264_PROFILE_EXTENDED', 88);
-define('H264_PROFILE_HIGH', 100);
-define('H264_PROFILE_HIGH10', 110);
-define('H264_PROFILE_HIGH422', 122);
-define('H264_PROFILE_HIGH444', 144);
-define('H264_PROFILE_HIGH444_PREDICTIVE', 244);
-
-class getid3_flv extends getid3_handler
-{
- const magic = 'FLV';
-
- /**
- * Break out of the loop if too many frames have been scanned; only scan this
- * many if meta frame does not contain useful duration.
- *
- * @var int
- */
- public $max_frames = 100000;
-
- /**
- * @return bool
- */
- public function Analyze() {
- $info = &$this->getid3->info;
-
- $this->fseek($info['avdataoffset']);
-
- $FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
- $FLVheader = $this->fread(5);
-
- $info['fileformat'] = 'flv';
- $info['flv']['header']['signature'] = substr($FLVheader, 0, 3);
- $info['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
- $TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
-
- if ($info['flv']['header']['signature'] != self::magic) {
- $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"');
- unset($info['flv'], $info['fileformat']);
- return false;
- }
-
- $info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
- $info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
-
- $FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4));
- $FLVheaderFrameLength = 9;
- if ($FrameSizeDataLength > $FLVheaderFrameLength) {
- $this->fseek($FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
- }
- $Duration = 0;
- $found_video = false;
- $found_audio = false;
- $found_meta = false;
- $found_valid_meta_playtime = false;
- $tagParseCount = 0;
- $info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0);
- $flv_framecount = &$info['flv']['framecount'];
- while ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) {
- $ThisTagHeader = $this->fread(16);
-
- $PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 0, 4));
- $TagType = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 4, 1));
- $DataLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 5, 3));
- $Timestamp = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 8, 3));
- $LastHeaderByte = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
- $NextOffset = $this->ftell() - 1 + $DataLength;
- if ($Timestamp > $Duration) {
- $Duration = $Timestamp;
- }
-
- $flv_framecount['total']++;
- switch ($TagType) {
- case GETID3_FLV_TAG_AUDIO:
- $flv_framecount['audio']++;
- if (!$found_audio) {
- $found_audio = true;
- $info['flv']['audio']['audioFormat'] = ($LastHeaderByte >> 4) & 0x0F;
- $info['flv']['audio']['audioRate'] = ($LastHeaderByte >> 2) & 0x03;
- $info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01;
- $info['flv']['audio']['audioType'] = $LastHeaderByte & 0x01;
- }
- break;
-
- case GETID3_FLV_TAG_VIDEO:
- $flv_framecount['video']++;
- if (!$found_video) {
- $found_video = true;
- $info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
-
- $FLVvideoHeader = $this->fread(11);
-
- if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
- // this code block contributed by: moysevichØgmail*com
-
- $AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1));
- if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) {
- // read AVCDecoderConfigurationRecord
- $configurationVersion = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 1));
- $AVCProfileIndication = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 1));
- $profile_compatibility = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 1));
- $lengthSizeMinusOne = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 1));
- $numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 8, 1));
-
- if (($numOfSequenceParameterSets & 0x1F) != 0) {
- // there is at least one SequenceParameterSet
- // read size of the first SequenceParameterSet
- //$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2));
- $spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2));
- // read the first SequenceParameterSet
- $sps = $this->fread($spsSize);
- if (strlen($sps) == $spsSize) { // make sure that whole SequenceParameterSet was red
- $spsReader = new AVCSequenceParameterSetReader($sps);
- $spsReader->readData();
- $info['video']['resolution_x'] = $spsReader->getWidth();
- $info['video']['resolution_y'] = $spsReader->getHeight();
- }
- }
- }
- // end: moysevichØgmail*com
-
- } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) {
-
- $PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
- $PictureSizeType = $PictureSizeType & 0x0007;
- $info['flv']['header']['videoSizeType'] = $PictureSizeType;
- switch ($PictureSizeType) {
- case 0:
- //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
- //$PictureSizeEnc <<= 1;
- //$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
- //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
- //$PictureSizeEnc <<= 1;
- //$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
-
- $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)) >> 7;
- $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 7;
- $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF;
- $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF;
- break;
-
- case 1:
- $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)) >> 7;
- $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 7;
- $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF;
- $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF;
- break;
-
- case 2:
- $info['video']['resolution_x'] = 352;
- $info['video']['resolution_y'] = 288;
- break;
-
- case 3:
- $info['video']['resolution_x'] = 176;
- $info['video']['resolution_y'] = 144;
- break;
-
- case 4:
- $info['video']['resolution_x'] = 128;
- $info['video']['resolution_y'] = 96;
- break;
-
- case 5:
- $info['video']['resolution_x'] = 320;
- $info['video']['resolution_y'] = 240;
- break;
-
- case 6:
- $info['video']['resolution_x'] = 160;
- $info['video']['resolution_y'] = 120;
- break;
-
- default:
- $info['video']['resolution_x'] = 0;
- $info['video']['resolution_y'] = 0;
- break;
-
- }
-
- } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_VP6FLV_ALPHA) {
-
- /* contributed by schouwerwouØgmail*com */
- if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set
- $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
- $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2));
- $info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3;
- $info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3;
- }
- /* end schouwerwouØgmail*com */
-
- }
- if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) {
- $info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
- }
- }
- break;
-
- // Meta tag
- case GETID3_FLV_TAG_META:
- if (!$found_meta) {
- $found_meta = true;
- $this->fseek(-1, SEEK_CUR);
- $datachunk = $this->fread($DataLength);
- $AMFstream = new AMFStream($datachunk);
- $reader = new AMFReader($AMFstream);
- $eventName = $reader->readData();
- $info['flv']['meta'][$eventName] = $reader->readData();
- unset($reader);
-
- $copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate');
- foreach ($copykeys as $sourcekey => $destkey) {
- if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) {
- switch ($sourcekey) {
- case 'width':
- case 'height':
- $info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey]));
- break;
- case 'audiodatarate':
- $info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000));
- break;
- case 'videodatarate':
- case 'frame_rate':
- default:
- $info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey];
- break;
- }
- }
- }
- if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
- $found_valid_meta_playtime = true;
- }
- }
- break;
-
- default:
- // noop
- break;
- }
- $this->fseek($NextOffset);
- }
-
- $info['playtime_seconds'] = $Duration / 1000;
- if ($info['playtime_seconds'] > 0) {
- $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
- }
-
- if ($info['flv']['header']['hasAudio']) {
- $info['audio']['codec'] = self::audioFormatLookup($info['flv']['audio']['audioFormat']);
- $info['audio']['sample_rate'] = self::audioRateLookup($info['flv']['audio']['audioRate']);
- $info['audio']['bits_per_sample'] = self::audioBitDepthLookup($info['flv']['audio']['audioSampleSize']);
-
- $info['audio']['channels'] = $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
- $info['audio']['lossless'] = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
- $info['audio']['dataformat'] = 'flv';
- }
- if (!empty($info['flv']['header']['hasVideo'])) {
- $info['video']['codec'] = self::videoCodecLookup($info['flv']['video']['videoCodec']);
- $info['video']['dataformat'] = 'flv';
- $info['video']['lossless'] = false;
- }
-
- // Set information from meta
- if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
- $info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration'];
- $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
- }
- if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) {
- $info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']);
- }
- if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
- $info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']);
- }
- return true;
- }
-
- /**
- * @param int $id
- *
- * @return string|false
- */
- public static function audioFormatLookup($id) {
- static $lookup = array(
- 0 => 'Linear PCM, platform endian',
- 1 => 'ADPCM',
- 2 => 'mp3',
- 3 => 'Linear PCM, little endian',
- 4 => 'Nellymoser 16kHz mono',
- 5 => 'Nellymoser 8kHz mono',
- 6 => 'Nellymoser',
- 7 => 'G.711A-law logarithmic PCM',
- 8 => 'G.711 mu-law logarithmic PCM',
- 9 => 'reserved',
- 10 => 'AAC',
- 11 => 'Speex',
- 12 => false, // unknown?
- 13 => false, // unknown?
- 14 => 'mp3 8kHz',
- 15 => 'Device-specific sound',
- );
- return (isset($lookup[$id]) ? $lookup[$id] : false);
- }
-
- /**
- * @param int $id
- *
- * @return int|false
- */
- public static function audioRateLookup($id) {
- static $lookup = array(
- 0 => 5500,
- 1 => 11025,
- 2 => 22050,
- 3 => 44100,
- );
- return (isset($lookup[$id]) ? $lookup[$id] : false);
- }
-
- /**
- * @param int $id
- *
- * @return int|false
- */
- public static function audioBitDepthLookup($id) {
- static $lookup = array(
- 0 => 8,
- 1 => 16,
- );
- return (isset($lookup[$id]) ? $lookup[$id] : false);
- }
-
- /**
- * @param int $id
- *
- * @return string|false
- */
- public static function videoCodecLookup($id) {
- static $lookup = array(
- GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
- GETID3_FLV_VIDEO_SCREEN => 'Screen video',
- GETID3_FLV_VIDEO_VP6FLV => 'On2 VP6',
- GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
- GETID3_FLV_VIDEO_SCREENV2 => 'Screen video v2',
- GETID3_FLV_VIDEO_H264 => 'Sorenson H.264',
- );
- return (isset($lookup[$id]) ? $lookup[$id] : false);
- }
-}
-
-class AMFStream
-{
- /**
- * @var string
- */
- public $bytes;
-
- /**
- * @var int
- */
- public $pos;
-
- /**
- * @param string $bytes
- */
- public function __construct(&$bytes) {
- $this->bytes =& $bytes;
- $this->pos = 0;
- }
-
- /**
- * @return int
- */
- public function readByte() { // 8-bit
- return ord(substr($this->bytes, $this->pos++, 1));
- }
-
- /**
- * @return int
- */
- public function readInt() { // 16-bit
- return ($this->readByte() << 8) + $this->readByte();
- }
-
- /**
- * @return int
- */
- public function readLong() { // 32-bit
- return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
- }
-
- /**
- * @return float|false
- */
- public function readDouble() {
- return getid3_lib::BigEndian2Float($this->read(8));
- }
-
- /**
- * @return string
- */
- public function readUTF() {
- $length = $this->readInt();
- return $this->read($length);
- }
-
- /**
- * @return string
- */
- public function readLongUTF() {
- $length = $this->readLong();
- return $this->read($length);
- }
-
- /**
- * @param int $length
- *
- * @return string
- */
- public function read($length) {
- $val = substr($this->bytes, $this->pos, $length);
- $this->pos += $length;
- return $val;
- }
-
- /**
- * @return int
- */
- public function peekByte() {
- $pos = $this->pos;
- $val = $this->readByte();
- $this->pos = $pos;
- return $val;
- }
-
- /**
- * @return int
- */
- public function peekInt() {
- $pos = $this->pos;
- $val = $this->readInt();
- $this->pos = $pos;
- return $val;
- }
-
- /**
- * @return int
- */
- public function peekLong() {
- $pos = $this->pos;
- $val = $this->readLong();
- $this->pos = $pos;
- return $val;
- }
-
- /**
- * @return float|false
- */
- public function peekDouble() {
- $pos = $this->pos;
- $val = $this->readDouble();
- $this->pos = $pos;
- return $val;
- }
-
- /**
- * @return string
- */
- public function peekUTF() {
- $pos = $this->pos;
- $val = $this->readUTF();
- $this->pos = $pos;
- return $val;
- }
-
- /**
- * @return string
- */
- public function peekLongUTF() {
- $pos = $this->pos;
- $val = $this->readLongUTF();
- $this->pos = $pos;
- return $val;
- }
-}
-
-class AMFReader
-{
- /**
- * @var AMFStream
- */
- public $stream;
-
- /**
- * @param AMFStream $stream
- */
- public function __construct(AMFStream $stream) {
- $this->stream = $stream;
- }
-
- /**
- * @return mixed
- */
- public function readData() {
- $value = null;
-
- $type = $this->stream->readByte();
- switch ($type) {
-
- // Double
- case 0:
- $value = $this->readDouble();
- break;
-
- // Boolean
- case 1:
- $value = $this->readBoolean();
- break;
-
- // String
- case 2:
- $value = $this->readString();
- break;
-
- // Object
- case 3:
- $value = $this->readObject();
- break;
-
- // null
- case 6:
- return null;
- break;
-
- // Mixed array
- case 8:
- $value = $this->readMixedArray();
- break;
-
- // Array
- case 10:
- $value = $this->readArray();
- break;
-
- // Date
- case 11:
- $value = $this->readDate();
- break;
-
- // Long string
- case 13:
- $value = $this->readLongString();
- break;
-
- // XML (handled as string)
- case 15:
- $value = $this->readXML();
- break;
-
- // Typed object (handled as object)
- case 16:
- $value = $this->readTypedObject();
- break;
-
- // Long string
- default:
- $value = '(unknown or unsupported data type)';
- break;
- }
-
- return $value;
- }
-
- /**
- * @return float|false
- */
- public function readDouble() {
- return $this->stream->readDouble();
- }
-
- /**
- * @return bool
- */
- public function readBoolean() {
- return $this->stream->readByte() == 1;
- }
-
- /**
- * @return string
- */
- public function readString() {
- return $this->stream->readUTF();
- }
-
- /**
- * @return array
- */
- public function readObject() {
- // Get highest numerical index - ignored
-// $highestIndex = $this->stream->readLong();
-
- $data = array();
- $key = null;
-
- while ($key = $this->stream->readUTF()) {
- $data[$key] = $this->readData();
- }
- // Mixed array record ends with empty string (0x00 0x00) and 0x09
- if (($key == '') && ($this->stream->peekByte() == 0x09)) {
- // Consume byte
- $this->stream->readByte();
- }
- return $data;
- }
-
- /**
- * @return array
- */
- public function readMixedArray() {
- // Get highest numerical index - ignored
- $highestIndex = $this->stream->readLong();
-
- $data = array();
- $key = null;
-
- while ($key = $this->stream->readUTF()) {
- if (is_numeric($key)) {
- $key = (int) $key;
- }
- $data[$key] = $this->readData();
- }
- // Mixed array record ends with empty string (0x00 0x00) and 0x09
- if (($key == '') && ($this->stream->peekByte() == 0x09)) {
- // Consume byte
- $this->stream->readByte();
- }
-
- return $data;
- }
-
- /**
- * @return array
- */
- public function readArray() {
- $length = $this->stream->readLong();
- $data = array();
-
- for ($i = 0; $i < $length; $i++) {
- $data[] = $this->readData();
- }
- return $data;
- }
-
- /**
- * @return float|false
- */
- public function readDate() {
- $timestamp = $this->stream->readDouble();
- $timezone = $this->stream->readInt();
- return $timestamp;
- }
-
- /**
- * @return string
- */
- public function readLongString() {
- return $this->stream->readLongUTF();
- }
-
- /**
- * @return string
- */
- public function readXML() {
- return $this->stream->readLongUTF();
- }
-
- /**
- * @return array
- */
- public function readTypedObject() {
- $className = $this->stream->readUTF();
- return $this->readObject();
- }
-}
-
-class AVCSequenceParameterSetReader
-{
- /**
- * @var string
- */
- public $sps;
- public $start = 0;
- public $currentBytes = 0;
- public $currentBits = 0;
-
- /**
- * @var int
- */
- public $width;
-
- /**
- * @var int
- */
- public $height;
-
- /**
- * @param string $sps
- */
- public function __construct($sps) {
- $this->sps = $sps;
- }
-
- public function readData() {
- $this->skipBits(8);
- $this->skipBits(8);
- $profile = $this->getBits(8); // read profile
- if ($profile > 0) {
- $this->skipBits(8);
- $level_idc = $this->getBits(8); // level_idc
- $this->expGolombUe(); // seq_parameter_set_id // sps
- $this->expGolombUe(); // log2_max_frame_num_minus4
- $picOrderType = $this->expGolombUe(); // pic_order_cnt_type
- if ($picOrderType == 0) {
- $this->expGolombUe(); // log2_max_pic_order_cnt_lsb_minus4
- } elseif ($picOrderType == 1) {
- $this->skipBits(1); // delta_pic_order_always_zero_flag
- $this->expGolombSe(); // offset_for_non_ref_pic
- $this->expGolombSe(); // offset_for_top_to_bottom_field
- $num_ref_frames_in_pic_order_cnt_cycle = $this->expGolombUe(); // num_ref_frames_in_pic_order_cnt_cycle
- for ($i = 0; $i < $num_ref_frames_in_pic_order_cnt_cycle; $i++) {
- $this->expGolombSe(); // offset_for_ref_frame[ i ]
- }
- }
- $this->expGolombUe(); // num_ref_frames
- $this->skipBits(1); // gaps_in_frame_num_value_allowed_flag
- $pic_width_in_mbs_minus1 = $this->expGolombUe(); // pic_width_in_mbs_minus1
- $pic_height_in_map_units_minus1 = $this->expGolombUe(); // pic_height_in_map_units_minus1
-
- $frame_mbs_only_flag = $this->getBits(1); // frame_mbs_only_flag
- if ($frame_mbs_only_flag == 0) {
- $this->skipBits(1); // mb_adaptive_frame_field_flag
- }
- $this->skipBits(1); // direct_8x8_inference_flag
- $frame_cropping_flag = $this->getBits(1); // frame_cropping_flag
-
- $frame_crop_left_offset = 0;
- $frame_crop_right_offset = 0;
- $frame_crop_top_offset = 0;
- $frame_crop_bottom_offset = 0;
-
- if ($frame_cropping_flag) {
- $frame_crop_left_offset = $this->expGolombUe(); // frame_crop_left_offset
- $frame_crop_right_offset = $this->expGolombUe(); // frame_crop_right_offset
- $frame_crop_top_offset = $this->expGolombUe(); // frame_crop_top_offset
- $frame_crop_bottom_offset = $this->expGolombUe(); // frame_crop_bottom_offset
- }
- $this->skipBits(1); // vui_parameters_present_flag
- // etc
-
- $this->width = (($pic_width_in_mbs_minus1 + 1) * 16) - ($frame_crop_left_offset * 2) - ($frame_crop_right_offset * 2);
- $this->height = ((2 - $frame_mbs_only_flag) * ($pic_height_in_map_units_minus1 + 1) * 16) - ($frame_crop_top_offset * 2) - ($frame_crop_bottom_offset * 2);
- }
- }
-
- /**
- * @param int $bits
- */
- public function skipBits($bits) {
- $newBits = $this->currentBits + $bits;
- $this->currentBytes += (int)floor($newBits / 8);
- $this->currentBits = $newBits % 8;
- }
-
- /**
- * @return int
- */
- public function getBit() {
- $result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01;
- $this->skipBits(1);
- return $result;
- }
-
- /**
- * @param int $bits
- *
- * @return int
- */
- public function getBits($bits) {
- $result = 0;
- for ($i = 0; $i < $bits; $i++) {
- $result = ($result << 1) + $this->getBit();
- }
- return $result;
- }
-
- /**
- * @return int
- */
- public function expGolombUe() {
- $significantBits = 0;
- $bit = $this->getBit();
- while ($bit == 0) {
- $significantBits++;
- $bit = $this->getBit();
-
- if ($significantBits > 31) {
- // something is broken, this is an emergency escape to prevent infinite loops
- return 0;
- }
- }
- return (1 << $significantBits) + $this->getBits($significantBits) - 1;
- }
-
- /**
- * @return int
- */
- public function expGolombSe() {
- $result = $this->expGolombUe();
- if (($result & 0x01) == 0) {
- return -($result >> 1);
- } else {
- return ($result + 1) >> 1;
- }
- }
-
- /**
- * @return int
- */
- public function getWidth() {
- return $this->width;
- }
-
- /**
- * @return int
- */
- public function getHeight() {
- return $this->height;
- }
-}
generated by cgit (git 2.34.1) at 2026-05-16 08:54:50 +0000