Файл: F12/getid3/module.audio-video.flv.php
Строк: 392
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
// //
// FLV module by Seth Kaufman <seth@whirl-i-gig.com> //
// //
// * version 0.1 (26 June 2005) //
// //
// minor modifications by James Heinrich <info@getid3.org> //
// * version 0.1.1 (15 July 2005) //
// //
// Support for On2 VP6 codec and meta information by //
// Steve Webster <steve.webster@featurecreep.com> //
// * version 0.2 (22 February 2006) //
// //
// Modified to not read entire file into memory //
// by James Heinrich <info@getid3.org> //
// * version 0.3 (15 June 2006) //
// //
/////////////////////////////////////////////////////////////////
// //
// 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_VP6', 4);
class getid3_flv
{
function getid3_flv(&$fd, &$ThisFileInfo, $ReturnAllTagData=false) {
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$FLVdataLength = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'];
$FLVheader = fread($fd, 5);
$ThisFileInfo['fileformat'] = 'flv';
$ThisFileInfo['flv']['header']['signature'] = substr($FLVheader, 0, 3);
$ThisFileInfo['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
$TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
if ($ThisFileInfo['flv']['header']['signature'] != 'FLV') {
$ThisFileInfo['error'][] = 'Expecting "FLV" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$ThisFileInfo['flv']['header']['signature'].'"';
unset($ThisFileInfo['flv']);
unset($ThisFileInfo['fileformat']);
return false;
}
$ThisFileInfo['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
$ThisFileInfo['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
$FrameSizeDataLength = getid3_lib::BigEndian2Int(fread($fd, 4));
$FLVheaderFrameLength = 9;
if ($FrameSizeDataLength > $FLVheaderFrameLength) {
fseek($fd, $FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
}
$Duration = 0;
while ((ftell($fd) + 1) < $ThisFileInfo['avdataend']) {
//if (!$ThisFileInfo['flv']['header']['hasAudio'] || isset($ThisFileInfo['flv']['audio']['audioFormat'])) {
// if (!$ThisFileInfo['flv']['header']['hasVideo'] || isset($ThisFileInfo['flv']['video']['videoCodec'])) {
// break;
// }
//}
$ThisTagHeader = fread($fd, 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));
$NextOffset = ftell($fd) - 1 + $DataLength;
switch ($TagType) {
case GETID3_FLV_TAG_AUDIO:
if (!isset($ThisFileInfo['flv']['audio']['audioFormat'])) {
$ThisFileInfo['flv']['audio']['audioFormat'] = $LastHeaderByte & 0x07;
$ThisFileInfo['flv']['audio']['audioRate'] = ($LastHeaderByte & 0x30) / 0x10;
$ThisFileInfo['flv']['audio']['audioSampleSize'] = ($LastHeaderByte & 0x40) / 0x40;
$ThisFileInfo['flv']['audio']['audioType'] = ($LastHeaderByte & 0x80) / 0x80;
}
break;
case GETID3_FLV_TAG_VIDEO:
if (!isset($ThisFileInfo['flv']['video']['videoCodec'])) {
$ThisFileInfo['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
$FLVvideoHeader = fread($fd, 11);
if ($ThisFileInfo['flv']['video']['videoCodec'] != GETID3_FLV_VIDEO_VP6) {
$PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
$PictureSizeType = $PictureSizeType & 0x0007;
$ThisFileInfo['flv']['header']['videoSizeType'] = $PictureSizeType;
switch ($PictureSizeType) {
case 0:
$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
$PictureSizeEnc <<= 1;
$ThisFileInfo['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
$PictureSizeEnc <<= 1;
$ThisFileInfo['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
break;
case 1:
$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 4));
$PictureSizeEnc <<= 1;
$ThisFileInfo['video']['resolution_x'] = ($PictureSizeEnc & 0xFFFF0000) >> 16;
$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 4));
$PictureSizeEnc <<= 1;
$ThisFileInfo['video']['resolution_y'] = ($PictureSizeEnc & 0xFFFF0000) >> 16;
break;
case 2:
$ThisFileInfo['video']['resolution_x'] = 352;
$ThisFileInfo['video']['resolution_y'] = 288;
break;
case 3:
$ThisFileInfo['video']['resolution_x'] = 176;
$ThisFileInfo['video']['resolution_y'] = 144;
break;
case 4:
$ThisFileInfo['video']['resolution_x'] = 128;
$ThisFileInfo['video']['resolution_y'] = 96;
break;
case 5:
$ThisFileInfo['video']['resolution_x'] = 320;
$ThisFileInfo['video']['resolution_y'] = 240;
break;
case 6:
$ThisFileInfo['video']['resolution_x'] = 160;
$ThisFileInfo['video']['resolution_y'] = 120;
break;
default:
$ThisFileInfo['video']['resolution_x'] = 0;
$ThisFileInfo['video']['resolution_y'] = 0;
break;
}
}
}
break;
// Meta tag
case GETID3_FLV_TAG_META:
fseek($fd, -1, SEEK_CUR);
$reader = new AMFReader(new AMFStream(fread($fd, $DataLength)));
$eventName = $reader->readData();
$ThisFileInfo['meta'][$eventName] = $reader->readData();
unset($reader);
$ThisFileInfo['video']['frame_rate'] = $ThisFileInfo['meta']['onMetaData']['framerate'];
$ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['meta']['onMetaData']['width'];
$ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['meta']['onMetaData']['height'];
break;
default:
// noop
break;
}
if ($Timestamp > $Duration) {
$Duration = $Timestamp;
}
fseek($fd, $NextOffset, SEEK_SET);
}
$ThisFileInfo['playtime_seconds'] = $Duration / 1000;
$ThisFileInfo['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['playtime_seconds'];
if ($ThisFileInfo['flv']['header']['hasAudio']) {
$ThisFileInfo['audio']['codec'] = $this->FLVaudioFormat($ThisFileInfo['flv']['audio']['audioFormat']);
$ThisFileInfo['audio']['sample_rate'] = $this->FLVaudioRate($ThisFileInfo['flv']['audio']['audioRate']);
$ThisFileInfo['audio']['bits_per_sample'] = $this->FLVaudioBitDepth($ThisFileInfo['flv']['audio']['audioSampleSize']);
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
$ThisFileInfo['audio']['lossless'] = ($ThisFileInfo['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
$ThisFileInfo['audio']['dataformat'] = 'flv';
}
if (@$ThisFileInfo['flv']['header']['hasVideo']) {
$ThisFileInfo['video']['codec'] = $this->FLVvideoCodec($ThisFileInfo['flv']['video']['videoCodec']);
$ThisFileInfo['video']['dataformat'] = 'flv';
$ThisFileInfo['video']['lossless'] = false;
}
return true;
}
function FLVaudioFormat($id) {
$FLVaudioFormat = array(
0 => 'uncompressed',
1 => 'ADPCM',
2 => 'mp3',
5 => 'Nellymoser 8kHz mono',
6 => 'Nellymoser',
);
return (@$FLVaudioFormat[$id] ? @$FLVaudioFormat[$id] : false);
}
function FLVaudioRate($id) {
$FLVaudioRate = array(
0 => 5500,
1 => 11025,
2 => 22050,
3 => 44100,
);
return (@$FLVaudioRate[$id] ? @$FLVaudioRate[$id] : false);
}
function FLVaudioBitDepth($id) {
$FLVaudioBitDepth = array(
0 => 8,
1 => 16,
);
return (@$FLVaudioBitDepth[$id] ? @$FLVaudioBitDepth[$id] : false);
}
function FLVvideoCodec($id) {
$FLVvideoCodec = array(
GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
GETID3_FLV_VIDEO_SCREEN => 'Screen video',
GETID3_FLV_VIDEO_VP6 => 'On2 VP6',
);
return (@$FLVvideoCodec[$id] ? @$FLVvideoCodec[$id] : false);
}
}
class AMFStream {
var $bytes;
var $pos;
function AMFStream(&$bytes) {
$this->bytes =& $bytes;
$this->pos = 0;
}
function readByte() {
return getid3_lib::BigEndian2Int(substr($this->bytes, $this->pos++, 1));
}
function readInt() {
return ($this->readByte() << 8) + $this->readByte();
}
function readLong() {
return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
}
function readDouble() {
return getid3_lib::BigEndian2Float($this->read(8));
}
function readUTF() {
$length = $this->readInt();
return $this->read($length);
}
function readLongUTF() {
$length = $this->readLong();
return $this->read($length);
}
function read($length) {
$val = substr($this->bytes, $this->pos, $length);
$this->pos += $length;
return $val;
}
function peekByte() {
$pos = $this->pos;
$val = $this->readByte();
$this->pos = $pos;
return $val;
}
function peekInt() {
$pos = $this->pos;
$val = $this->readInt();
$this->pos = $pos;
return $val;
}
function peekLong() {
$pos = $this->pos;
$val = $this->readLong();
$this->pos = $pos;
return $val;
}
function peekDouble() {
$pos = $this->pos;
$val = $this->readDouble();
$this->pos = $pos;
return $val;
}
function peekUTF() {
$pos = $this->pos;
$val = $this->readUTF();
$this->pos = $pos;
return $val;
}
function peekLongUTF() {
$pos = $this->pos;
$val = $this->readLongUTF();
$this->pos = $pos;
return $val;
}
}
class AMFReader {
var $stream;
function AMFReader(&$stream) {
$this->stream =& $stream;
}
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;
}
function readDouble() {
return $this->stream->readDouble();
}
function readBoolean() {
return $this->stream->readByte() == 1;
}
function readString() {
return $this->stream->readUTF();
}
function readObject() {
// Get highest numerical index - ignored
$highestIndex = $this->stream->readLong();
$data = array();
while ($key = $this->stream->readUTF()) {
// Mixed array record ends with empty string (0x00 0x00) and 0x09
if (($key == '') && ($this->stream->peekByte() == 0x09)) {
// Consume byte
$this->stream->readByte();
break;
}
$data[$key] = $this->readData();
}
return $data;
}
function readMixedArray() {
// Get highest numerical index - ignored
$highestIndex = $this->stream->readLong();
$data = array();
while ($key = $this->stream->readUTF()) {
// Mixed array record ends with empty string (0x00 0x00) and 0x09
if (($key == '') && ($this->stream->peekByte() == 0x09)) {
// Consume byte
$this->stream->readByte();
break;
}
if (is_numeric($key)) {
$key = (float) $key;
}
$data[$key] = $this->readData();
}
return $data;
}
function readArray() {
$length = $this->stream->readLong();
$data = array();
for ($i = 0; $i < count($length); $i++) {
$data[] = $this->readData();
}
return $data;
}
function readDate() {
$timestamp = $this->stream->readDouble();
$timezone = $this->stream->readInt();
return $timestamp;
}
function readLongString() {
return $this->stream->readLongUTF();
}
function readXML() {
return $this->stream->readLongUTF();
}
function readTypedObject() {
$className = $this->stream->readUTF();
return $this->readObject();
}
}
?>