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 & 0x4);
$ThisFileInfo['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x1);
$FrameSizeDataLength = getid3_lib::BigEndian2Int(fread($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 & 0x7;
$ThisFileInfo['flv']['audio']['audioRate'] = ($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'] = $LastHeaderByte & 0x7;
switch ($ThisFileInfo['flv']['video']['videoCodec']) {
case GETID3_FLV_VIDEO_H263:
$FLVvideoHeader = fread($fd, 11);
$PictureSizeType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2)) >> 7;
$PictureSizeType = $PictureSizeType & 0x7;
$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;
case GETID3_FLV_VIDEO_SCREEN:
$bits = new BitStreamReader(fread($fd, $DataLength));
$bits->seek(4, SEEK_CUR);
$ThisFileInfo['video']['resolution_x'] = $bits->getInt(12);
$bits->seek(4, SEEK_CUR);
$ThisFileInfo['video']['resolution_y'] = $bits->getInt(12);
break;
case GETID3_FLV_VIDEO_VP6:
$bits = new BitStreamReader(fread($fd, $DataLength));
$adjW = $bits->getInt(4);
$adjH = $bits->getInt(4);
$mode = $bits->getInt(1);
if ($mode === 0) {
$bits->seek(15, SEEK_CUR);
$ThisFileInfo['video']['resolution_y'] = $bits->getInt(8) * 16 - $adjH;
$ThisFileInfo['video']['resolution_x'] = $bits->getInt(8) * 16 - $adjW;
}
break;
case GETID3_FLV_VIDEO_VP6ALPHA:
$bits = new BitStreamReader(fread($fd, $DataLength));
$adjW = $bits->getInt(4);
$adjH = $bits->getInt(4);
$mode = $bits->getInt(1);
// mode is for ? unknown ?
if ($mode === 0) {
$bits->seek(39, SEEK_CUR);
$ThisFileInfo['video']['resolution_y'] = $bits->getInt(8) * 16 - $adjH;
$ThisFileInfo['video']['resolution_x'] = $bits->getInt(8) * 16 - $adjW;
}
break;
case GETID3_FLV_VIDEO_SCREENVIDEO_2:
$ThisFileInfo['video']['resolution_x'] = $bits->getInt(12);
$ThisFileInfo['video']['resolution_y'] = $bits->getInt(12);
break;
}
}
break;
// Meta tag
// Meta tag
case GETID3_FLV_TAG_META:
fseek($fd, -1, SEEK_CUR);
$reader = new AMFReader(fread($fd, $DataLength));
$eventName = $reader->getItem();
if ($eventName == 'onMetaData') {
$ThisFileInfo['meta']['onMetaData'] = $reader->getItem();
}
unset($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, $NextOffset, SEEK_SET);
}
if ($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;
}
