730 lines
23 KiB
PHP
730 lines
23 KiB
PHP
<?php
|
|
/////////////////////////////////////////////////////////////////
|
|
/// getID3() by James Heinrich <info@getid3.org> //
|
|
// available at http://getid3.sourceforge.net //
|
|
// or http://www.getid3.org //
|
|
// //
|
|
// 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() //
|
|
// //
|
|
/////////////////////////////////////////////////////////////////
|
|
// //
|
|
// module.audio-video.flv.php //
|
|
// module for analyzing Shockwave Flash Video files //
|
|
// dependencies: NONE //
|
|
// ///
|
|
/////////////////////////////////////////////////////////////////
|
|
|
|
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
|
|
{
|
|
public $max_frames = 100000; // break out of the loop if too many frames have been scanned; only scan this many if meta frame does not contain useful duration
|
|
|
|
public function Analyze() {
|
|
$info = &$this->getid3->info;
|
|
|
|
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
|
|
|
|
$FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
|
|
$FLVheader = fread($this->getid3->fp, 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));
|
|
|
|
$magic = 'FLV';
|
|
if ($info['flv']['header']['signature'] != $magic) {
|
|
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"';
|
|
unset($info['flv']);
|
|
unset($info['fileformat']);
|
|
return false;
|
|
}
|
|
|
|
$info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
|
|
$info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
|
|
|
|
$FrameSizeDataLength = getid3_lib::BigEndian2Int(fread($this->getid3->fp, 4));
|
|
$FLVheaderFrameLength = 9;
|
|
if ($FrameSizeDataLength > $FLVheaderFrameLength) {
|
|
fseek($this->getid3->fp, $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 (((ftell($this->getid3->fp) + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) {
|
|
$ThisTagHeader = fread($this->getid3->fp, 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));
|
|
$NextOffset = ftell($this->getid3->fp) - 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;
|
|
|
|
$FLVvideoHeader = fread($this->getid3->fp, 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
|
|
$sps = fread($this->getid3->fp, $spsSize);
|
|
if (strlen($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));
|
|
$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
|
|
$PictureSizeEnc['x'] >>= 7;
|
|
$PictureSizeEnc['y'] >>= 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));
|
|
$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3));
|
|
$PictureSizeEnc['x'] >>= 7;
|
|
$PictureSizeEnc['y'] >>= 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;
|
|
|
|
}
|
|
}
|
|
$info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
|
|
}
|
|
break;
|
|
|
|
// Meta tag
|
|
case GETID3_FLV_TAG_META:
|
|
if (!$found_meta) {
|
|
$found_meta = true;
|
|
fseek($this->getid3->fp, -1, SEEK_CUR);
|
|
$datachunk = fread($this->getid3->fp, $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'])) {
|
|
$found_valid_meta_playtime = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
// noop
|
|
break;
|
|
}
|
|
fseek($this->getid3->fp, $NextOffset, SEEK_SET);
|
|
}
|
|
|
|
$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'] = $this->FLVaudioFormat($info['flv']['audio']['audioFormat']);
|
|
$info['audio']['sample_rate'] = $this->FLVaudioRate($info['flv']['audio']['audioRate']);
|
|
$info['audio']['bits_per_sample'] = $this->FLVaudioBitDepth($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'] = $this->FLVvideoCodec($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'] = $this->FLVaudioFormat($info['flv']['meta']['onMetaData']['audiocodecid']);
|
|
}
|
|
if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
|
|
$info['video']['codec'] = $this->FLVvideoCodec($info['flv']['meta']['onMetaData']['videocodecid']);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
public function FLVaudioFormat($id) {
|
|
$FLVaudioFormat = array(
|
|
0 => 'Linear PCM, platform endian',
|
|
1 => 'ADPCM',
|
|
2 => 'mp3',
|
|
3 => 'Linear PCM, little endian',
|
|
4 => 'Nellymoser 16kHz mono',
|
|
5 => 'Nellymoser 8kHz mono',
|
|
6 => 'Nellymoser',
|
|
7 => 'G.711A-law logarithmic PCM',
|
|
8 => 'G.711 mu-law logarithmic PCM',
|
|
9 => 'reserved',
|
|
10 => 'AAC',
|
|
11 => false, // unknown?
|
|
12 => false, // unknown?
|
|
13 => false, // unknown?
|
|
14 => 'mp3 8kHz',
|
|
15 => 'Device-specific sound',
|
|
);
|
|
return (isset($FLVaudioFormat[$id]) ? $FLVaudioFormat[$id] : false);
|
|
}
|
|
|
|
public function FLVaudioRate($id) {
|
|
$FLVaudioRate = array(
|
|
0 => 5500,
|
|
1 => 11025,
|
|
2 => 22050,
|
|
3 => 44100,
|
|
);
|
|
return (isset($FLVaudioRate[$id]) ? $FLVaudioRate[$id] : false);
|
|
}
|
|
|
|
public function FLVaudioBitDepth($id) {
|
|
$FLVaudioBitDepth = array(
|
|
0 => 8,
|
|
1 => 16,
|
|
);
|
|
return (isset($FLVaudioBitDepth[$id]) ? $FLVaudioBitDepth[$id] : false);
|
|
}
|
|
|
|
public function FLVvideoCodec($id) {
|
|
$FLVvideoCodec = array(
|
|
GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
|
|
GETID3_FLV_VIDEO_SCREEN => 'Screen video',
|
|
GETID3_FLV_VIDEO_VP6FLV => 'On2 VP6',
|
|
GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
|
|
GETID3_FLV_VIDEO_SCREENV2 => 'Screen video v2',
|
|
GETID3_FLV_VIDEO_H264 => 'Sorenson H.264',
|
|
);
|
|
return (isset($FLVvideoCodec[$id]) ? $FLVvideoCodec[$id] : false);
|
|
}
|
|
}
|
|
|
|
class AMFStream {
|
|
public $bytes;
|
|
public $pos;
|
|
|
|
public function AMFStream(&$bytes) {
|
|
$this->bytes =& $bytes;
|
|
$this->pos = 0;
|
|
}
|
|
|
|
public function readByte() {
|
|
return getid3_lib::BigEndian2Int(substr($this->bytes, $this->pos++, 1));
|
|
}
|
|
|
|
public function readInt() {
|
|
return ($this->readByte() << 8) + $this->readByte();
|
|
}
|
|
|
|
public function readLong() {
|
|
return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
|
|
}
|
|
|
|
public function readDouble() {
|
|
return getid3_lib::BigEndian2Float($this->read(8));
|
|
}
|
|
|
|
public function readUTF() {
|
|
$length = $this->readInt();
|
|
return $this->read($length);
|
|
}
|
|
|
|
public function readLongUTF() {
|
|
$length = $this->readLong();
|
|
return $this->read($length);
|
|
}
|
|
|
|
public function read($length) {
|
|
$val = substr($this->bytes, $this->pos, $length);
|
|
$this->pos += $length;
|
|
return $val;
|
|
}
|
|
|
|
public function peekByte() {
|
|
$pos = $this->pos;
|
|
$val = $this->readByte();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
|
|
public function peekInt() {
|
|
$pos = $this->pos;
|
|
$val = $this->readInt();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
|
|
public function peekLong() {
|
|
$pos = $this->pos;
|
|
$val = $this->readLong();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
|
|
public function peekDouble() {
|
|
$pos = $this->pos;
|
|
$val = $this->readDouble();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
|
|
public function peekUTF() {
|
|
$pos = $this->pos;
|
|
$val = $this->readUTF();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
|
|
public function peekLongUTF() {
|
|
$pos = $this->pos;
|
|
$val = $this->readLongUTF();
|
|
$this->pos = $pos;
|
|
return $val;
|
|
}
|
|
}
|
|
|
|
class AMFReader {
|
|
public $stream;
|
|
|
|
public function AMFReader(&$stream) {
|
|
$this->stream =& $stream;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
public function readDouble() {
|
|
return $this->stream->readDouble();
|
|
}
|
|
|
|
public function readBoolean() {
|
|
return $this->stream->readByte() == 1;
|
|
}
|
|
|
|
public function readString() {
|
|
return $this->stream->readUTF();
|
|
}
|
|
|
|
public function readObject() {
|
|
// Get highest numerical index - ignored
|
|
// $highestIndex = $this->stream->readLong();
|
|
|
|
$data = array();
|
|
|
|
while ($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;
|
|
}
|
|
|
|
public function readMixedArray() {
|
|
// Get highest numerical index - ignored
|
|
$highestIndex = $this->stream->readLong();
|
|
|
|
$data = array();
|
|
|
|
while ($key = $this->stream->readUTF()) {
|
|
if (is_numeric($key)) {
|
|
$key = (float) $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;
|
|
}
|
|
|
|
public function readArray() {
|
|
$length = $this->stream->readLong();
|
|
$data = array();
|
|
|
|
for ($i = 0; $i < $length; $i++) {
|
|
$data[] = $this->readData();
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
public function readDate() {
|
|
$timestamp = $this->stream->readDouble();
|
|
$timezone = $this->stream->readInt();
|
|
return $timestamp;
|
|
}
|
|
|
|
public function readLongString() {
|
|
return $this->stream->readLongUTF();
|
|
}
|
|
|
|
public function readXML() {
|
|
return $this->stream->readLongUTF();
|
|
}
|
|
|
|
public function readTypedObject() {
|
|
$className = $this->stream->readUTF();
|
|
return $this->readObject();
|
|
}
|
|
}
|
|
|
|
class AVCSequenceParameterSetReader {
|
|
public $sps;
|
|
public $start = 0;
|
|
public $currentBytes = 0;
|
|
public $currentBits = 0;
|
|
public $width;
|
|
public $height;
|
|
|
|
public function AVCSequenceParameterSetReader($sps) {
|
|
$this->sps = $sps;
|
|
}
|
|
|
|
public function readData() {
|
|
$this->skipBits(8);
|
|
$this->skipBits(8);
|
|
$profile = $this->getBits(8); // read profile
|
|
$this->skipBits(16);
|
|
$this->expGolombUe(); // read sps id
|
|
if (in_array($profile, array(H264_PROFILE_HIGH, H264_PROFILE_HIGH10, H264_PROFILE_HIGH422, H264_PROFILE_HIGH444, H264_PROFILE_HIGH444_PREDICTIVE))) {
|
|
if ($this->expGolombUe() == 3) {
|
|
$this->skipBits(1);
|
|
}
|
|
$this->expGolombUe();
|
|
$this->expGolombUe();
|
|
$this->skipBits(1);
|
|
if ($this->getBit()) {
|
|
for ($i = 0; $i < 8; $i++) {
|
|
if ($this->getBit()) {
|
|
$size = $i < 6 ? 16 : 64;
|
|
$lastScale = 8;
|
|
$nextScale = 8;
|
|
for ($j = 0; $j < $size; $j++) {
|
|
if ($nextScale != 0) {
|
|
$deltaScale = $this->expGolombUe();
|
|
$nextScale = ($lastScale + $deltaScale + 256) % 256;
|
|
}
|
|
if ($nextScale != 0) {
|
|
$lastScale = $nextScale;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$this->expGolombUe();
|
|
$pocType = $this->expGolombUe();
|
|
if ($pocType == 0) {
|
|
$this->expGolombUe();
|
|
} elseif ($pocType == 1) {
|
|
$this->skipBits(1);
|
|
$this->expGolombSe();
|
|
$this->expGolombSe();
|
|
$pocCycleLength = $this->expGolombUe();
|
|
for ($i = 0; $i < $pocCycleLength; $i++) {
|
|
$this->expGolombSe();
|
|
}
|
|
}
|
|
$this->expGolombUe();
|
|
$this->skipBits(1);
|
|
$this->width = ($this->expGolombUe() + 1) * 16;
|
|
$heightMap = $this->expGolombUe() + 1;
|
|
$this->height = (2 - $this->getBit()) * $heightMap * 16;
|
|
}
|
|
|
|
public function skipBits($bits) {
|
|
$newBits = $this->currentBits + $bits;
|
|
$this->currentBytes += (int)floor($newBits / 8);
|
|
$this->currentBits = $newBits % 8;
|
|
}
|
|
|
|
public function getBit() {
|
|
$result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01;
|
|
$this->skipBits(1);
|
|
return $result;
|
|
}
|
|
|
|
public function getBits($bits) {
|
|
$result = 0;
|
|
for ($i = 0; $i < $bits; $i++) {
|
|
$result = ($result << 1) + $this->getBit();
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
public function expGolombSe() {
|
|
$result = $this->expGolombUe();
|
|
if (($result & 0x01) == 0) {
|
|
return -($result >> 1);
|
|
} else {
|
|
return ($result + 1) >> 1;
|
|
}
|
|
}
|
|
|
|
public function getWidth() {
|
|
return $this->width;
|
|
}
|
|
|
|
public function getHeight() {
|
|
return $this->height;
|
|
}
|
|
}
|