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sources/3rdparty/getid3/module.audio-video.flv.php
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<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at http://getid3.sourceforge.net // // or http://www.getid3.org // // // |
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// FLV module by Seth Kaufman <sethØwhirl-i-gig*com> // |
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// // // * 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 // |
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// by Steve Webster <steve.websterØfeaturecreep*com> // |
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// // // * 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 // |
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// by Evgeny Moysevich <moysevichØgmail*com> // |
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// // // * 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 // |
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// by Nigel Barnes <ngbarnesØhotmail*com> // |
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// //
// * 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
{
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public $max_frames = 100000; // break out of the loop if too many frames have been scanned; only scan this many if meta frame does not contain useful duration |
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public function Analyze() {
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$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;
}
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public function FLVaudioFormat($id) {
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$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); } |
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public function FLVaudioRate($id) {
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$FLVaudioRate = array( 0 => 5500, 1 => 11025, 2 => 22050, 3 => 44100, ); return (isset($FLVaudioRate[$id]) ? $FLVaudioRate[$id] : false); } |
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public function FLVaudioBitDepth($id) {
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$FLVaudioBitDepth = array( 0 => 8, 1 => 16, ); return (isset($FLVaudioBitDepth[$id]) ? $FLVaudioBitDepth[$id] : false); } |
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public function FLVvideoCodec($id) {
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$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 {
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public $bytes; public $pos; |
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public function AMFStream(&$bytes) {
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$this->bytes =& $bytes; $this->pos = 0; } |
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public function readByte() {
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return getid3_lib::BigEndian2Int(substr($this->bytes, $this->pos++, 1)); } |
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public function readInt() {
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return ($this->readByte() << 8) + $this->readByte(); } |
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public function readLong() {
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return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte(); } |
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public function readDouble() {
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return getid3_lib::BigEndian2Float($this->read(8)); } |
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public function readUTF() {
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$length = $this->readInt(); return $this->read($length); } |
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public function readLongUTF() {
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$length = $this->readLong(); return $this->read($length); } |
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public function read($length) {
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$val = substr($this->bytes, $this->pos, $length); $this->pos += $length; return $val; } |
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public function peekByte() {
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$pos = $this->pos; $val = $this->readByte(); $this->pos = $pos; return $val; } |
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public function peekInt() {
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$pos = $this->pos; $val = $this->readInt(); $this->pos = $pos; return $val; } |
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public function peekLong() {
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$pos = $this->pos; $val = $this->readLong(); $this->pos = $pos; return $val; } |
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public function peekDouble() {
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$pos = $this->pos; $val = $this->readDouble(); $this->pos = $pos; return $val; } |
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public function peekUTF() {
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$pos = $this->pos; $val = $this->readUTF(); $this->pos = $pos; return $val; } |
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public function peekLongUTF() {
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$pos = $this->pos;
$val = $this->readLongUTF();
$this->pos = $pos;
return $val;
}
}
class AMFReader {
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public $stream; |
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public function AMFReader(&$stream) {
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$this->stream =& $stream; } |
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public function readData() {
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$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;
}
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public function readDouble() {
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return $this->stream->readDouble(); } |
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public function readBoolean() {
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return $this->stream->readByte() == 1; } |
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public function readString() {
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return $this->stream->readUTF(); } |
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public function readObject() {
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// 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;
}
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public function readMixedArray() {
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// 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 $data;
}
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public function readArray() {
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$length = $this->stream->readLong();
$data = array();
for ($i = 0; $i < $length; $i++) {
$data[] = $this->readData();
}
return $data;
}
|
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public function readDate() {
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$timestamp = $this->stream->readDouble(); $timezone = $this->stream->readInt(); return $timestamp; } |
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public function readLongString() {
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return $this->stream->readLongUTF(); } |
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public function readXML() {
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return $this->stream->readLongUTF(); } |
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public function readTypedObject() {
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$className = $this->stream->readUTF();
return $this->readObject();
}
}
class AVCSequenceParameterSetReader {
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public $sps;
public $start = 0;
public $currentBytes = 0;
public $currentBits = 0;
public $width;
public $height;
public function AVCSequenceParameterSetReader($sps) {
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$this->sps = $sps; } |
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public function readData() {
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$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()) * $heightMap * 16;
}
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public function skipBits($bits) {
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$newBits = $this->currentBits + $bits; $this->currentBytes += (int)floor($newBits / 8); $this->currentBits = $newBits % 8; } |
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public function getBit() {
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$result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01; $this->skipBits(1); return $result; } |
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public function getBits($bits) {
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$result = 0;
for ($i = 0; $i < $bits; $i++) {
$result = ($result << 1) + $this->getBit();
}
return $result;
}
|
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664 |
public function expGolombUe() {
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$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;
}
|
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678 |
public function expGolombSe() {
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$result = $this->expGolombUe();
if (($result & 0x01) == 0) {
return -($result >> 1);
} else {
return ($result + 1) >> 1;
}
}
|
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public function getWidth() {
|
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return $this->width; } |
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|
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public function getHeight() {
|
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return $this->height; } } |