File Source for module.audio-video.flv.php

<?php
// +----------------------------------------------------------------------+
// | PHP version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2 of the GPL license, |
// | that is bundled with this package in the file license.txt and is |
// | available through the world-wide-web at the following url: |
// | http://www.gnu.org/copyleft/gpl.html |
// +----------------------------------------------------------------------+
// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
// +----------------------------------------------------------------------+
// | Authors: James Heinrich <infoØgetid3*org> |
// | Allan Hansen <ahØartemis*dk> |
// +----------------------------------------------------------------------+
// | module.archive.gzip.php |
// | module for analyzing GZIP files |
// | dependencies: NONE |
// +----------------------------------------------------------------------+
// | FLV module by Seth Kaufman <sethØwhirl-i.gig*com> |
// | |
// | * version 0.1 (26 June 2005) |
// | |
// | minor modifications by James Heinrich <infoØgetid3*org> |
// | * version 0.1.1 (15 July 2005) |
// | |
// | Support for On2 VP6 codec and meta information by |
// | Steve Webster <steve.websterØfeaturecreep*com> |
// | * version 0.2 (22 February 2006) |
// | |
// | Modified to not read entire file into memory |
// | by James Heinrich <infoØgetid3*org> |
// | * version 0.3 (15 June 2006) |
// | |
// | Modifications by Allan Hansen <ahØartemis*dk> |
// | Adapted module for PHP5 and getID3 2.0.0. |
// +----------------------------------------------------------------------+
//
// $Id: module.audio-video.flv.php,v 1.7 2006/11/10 11:20:12 ah Exp $
class getid3_flv extends getid3_handler
{
const TAG_AUDIO = 8;
const TAG_VIDEO = 9;
const TAG_META = 18;
const VIDEO_H263 = 2;
const VIDEO_SCREEN = 3;
const VIDEO_VP6 = 4;
public function Analyze()
{
$info = &$this->getid3->info;
$info['flv'] = array ();
$info_flv = &$info['flv'];
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
$flv_data_length = $info['avdataend'] - $info['avdataoffset'];
$flv_header = fread($this->getid3->fp, 5);
$info['fileformat'] = 'flv';
$info_flv['header']['signature'] = substr($flv_header, 0, 3);
$info_flv['header']['version'] = getid3_lib::BigEndian2Int(substr($flv_header, 3, 1));
$type_flags = getid3_lib::BigEndian2Int(substr($flv_header, 4, 1));
$info_flv['header']['hasAudio'] = (bool) ($type_flags & 0x04);
$info_flv['header']['hasVideo'] = (bool) ($type_flags & 0x01);
$frame_size_data_length = getid3_lib::BigEndian2Int(fread($this->getid3->fp, 4));
$flv_header_frame_length = 9;
if ($frame_size_data_length > $flv_header_frame_length) {
fseek($this->getid3->fp, $frame_size_data_length - $flv_header_frame_length, SEEK_CUR);
}
$duration = 0;
while ((ftell($this->getid3->fp) + 1) < $info['avdataend']) {
$this_tag_header = fread($this->getid3->fp, 16);
$previous_tag_length = getid3_lib::BigEndian2Int(substr($this_tag_header, 0, 4));
$tag_type = getid3_lib::BigEndian2Int(substr($this_tag_header, 4, 1));
$data_length = getid3_lib::BigEndian2Int(substr($this_tag_header, 5, 3));
$timestamp = getid3_lib::BigEndian2Int(substr($this_tag_header, 8, 3));
$last_header_byte = getid3_lib::BigEndian2Int(substr($this_tag_header, 15, 1));
$next_offset = ftell($this->getid3->fp) - 1 + $data_length;
switch ($tag_type) {
case getid3_flv::TAG_AUDIO:
if (!isset($info_flv['audio']['audioFormat'])) {
$info_flv['audio']['audioFormat'] = $last_header_byte & 0x07;
$info_flv['audio']['audioRate'] = ($last_header_byte & 0x30) / 0x10;
$info_flv['audio']['audioSampleSize'] = ($last_header_byte & 0x40) / 0x40;
$info_flv['audio']['audioType'] = ($last_header_byte & 0x80) / 0x80;
}
break;
case getid3_flv::TAG_VIDEO:
if (!isset($info_flv['video']['videoCodec'])) {
$info_flv['video']['videoCodec'] = $last_header_byte & 0x07;
$flv_video_header = fread($this->getid3->fp, 11);
if ($info_flv['video']['videoCodec'] != getid3_flv::VIDEO_VP6) {
$picture_size_type = (getid3_lib::BigEndian2Int(substr($flv_video_header, 3, 2))) >> 7;
$picture_size_type = $picture_size_type & 0x0007;
$info_flv['header']['videoSizeType'] = $picture_size_type;
switch ($picture_size_type) {
case 0:
$picture_size_enc = getid3_lib::BigEndian2Int(substr($flv_video_header, 5, 2));
$picture_size_enc <<= 1;
$info['video']['resolution_x'] = ($picture_size_enc & 0xFF00) >> 8;
$picture_size_enc = getid3_lib::BigEndian2Int(substr($flv_video_header, 6, 2));
$picture_size_enc <<= 1;
$info['video']['resolution_y'] = ($picture_size_enc & 0xFF00) >> 8;
break;
case 1:
$picture_size_enc = getid3_lib::BigEndian2Int(substr($flv_video_header, 5, 4));
$picture_size_enc <<= 1;
$info['video']['resolution_x'] = ($picture_size_enc & 0xFFFF0000) >> 16;
$picture_size_enc = getid3_lib::BigEndian2Int(substr($flv_video_header, 7, 4));
$picture_size_enc <<= 1;
$info['video']['resolution_y'] = ($picture_size_enc & 0xFFFF0000) >> 16;
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;
$info['video']['resolution_y'] = 0;
break;
}
}
}
break;
// Meta tag
case getid3_flv::TAG_META:
fseek($this->getid3->fp, -1, SEEK_CUR);
$reader = new AMFReader(new AMFStream(fread($this->getid3->fp, $data_length)));
$event_name = $reader->readData();
$info['meta'][$event_name] = $reader->readData();
unset($reader);
$info['video']['frame_rate'] = @$info['meta']['onMetaData']['framerate'];
$info['video']['resolution_x'] = @$info['meta']['onMetaData']['width'];
$info['video']['resolution_y'] = @$info['meta']['onMetaData']['height'];
break;
default:
// noop
break;
}
if ($timestamp > $duration) {
$duration = $timestamp;
}
fseek($this->getid3->fp, $next_offset, SEEK_SET);
}
if ($info['playtime_seconds'] = $duration / 1000) {
$info['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds'];
}
if ($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
$info['audio']['dataformat'] = 'flv';
}
if (@$info_flv['header']['hasVideo']) {
$info['video']['codec'] = $this->FLVvideoCodec($info_flv['video']['videoCodec']);
$info['video']['dataformat'] = 'flv';
$info['video']['lossless'] = false;
}
return true;
}
public static function FLVaudioFormat($id) {
static $lookup = array(
0 => 'uncompressed',
1 => 'ADPCM',
2 => 'mp3',
5 => 'Nellymoser 8kHz mono',
6 => 'Nellymoser',
);
return (@$lookup[$id] ? @$lookup[$id] : false);
}
public static function FLVaudioRate($id) {
static $lookup = array(
0 => 5500,
1 => 11025,
2 => 22050,
3 => 44100,
);
return (@$lookup[$id] ? @$lookup[$id] : false);
}
public static function FLVaudioBitDepth($id) {
static $lookup = array(
0 => 8,
1 => 16,
);
return (@$lookup[$id] ? @$lookup[$id] : false);
}
public static function FLVvideoCodec($id) {
static $lookup = array(
getid3_flv::VIDEO_H263 => 'Sorenson H.263',
getid3_flv::VIDEO_SCREEN => 'Screen video',
getid3_flv::VIDEO_VP6 => 'On2 VP6',
);
return (@$lookup[$id] ? @$lookup[$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 $stream;
public function __construct($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 = $this->stream->readUTF()) {
// Mixed array record ends with empty string (0x00 0x00) and 0x09
if (($key == '') && ($this->stream->peekByte() == 0x09)) {
// Consume byte
$this->stream->readByte();
break;
}
$data[$key] = $this->readData();
}
return $data;
}
public 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;
}
public function readArray() {
$length = $this->stream->readLong();
$data = array();
for ($i = 0; $i < count($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();
}
}
?>

Source for file module.audio-video.flv.php