Syntax Syntax
Source Source
File: wp-includes/ID3/module.audio-video.flv.php
define('H264_PROFILE_HIGH422', 122); define('H264_PROFILE_HIGH444', 144); define('H264_PROFILE_HIGH444_PREDICTIVE', 244); class getid3_flv extends getid3_handler { const magic = 'FLV'; /** * Break out of the loop if too many frames have been scanned; only scan this * many if meta frame does not contain useful duration. * * @var int */ public $max_frames = 100000; /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $this->fseek($info['avdataoffset']); $FLVdataLength = $info['avdataend'] - $info['avdataoffset']; $FLVheader = $this->fread(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)); if ($info['flv']['header']['signature'] != self::magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"'); unset($info['flv'], $info['fileformat']); return false; } $info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04); $info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01); $FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4)); $FLVheaderFrameLength = 9; if ($FrameSizeDataLength > $FLVheaderFrameLength) { $this->fseek($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 ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) { $ThisTagHeader = $this->fread(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 = $this->ftell() - 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 = $this->fread(11); if ($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 = $this->fread($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)) >> 7; $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 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)) >> 7; $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 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; $info['video']['resolution_y'] = 0; break; } } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_VP6FLV_ALPHA) { /* contributed by schouwerwouØgmail*com */ if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2)); $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2)); $info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3; $info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3; } /* end schouwerwouØgmail*com */ } if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) { $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; $this->fseek(-1, SEEK_CUR); $datachunk = $this->fread($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; } $this->fseek($NextOffset); } $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']) { $info['audio']['codec'] = self::audioFormatLookup($info['flv']['audio']['audioFormat']); $info['audio']['sample_rate'] = self::audioRateLookup($info['flv']['audio']['audioRate']); $info['audio']['bits_per_sample'] = self::audioBitDepthLookup($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'])) { $info['video']['codec'] = self::videoCodecLookup($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'])) { $info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']); } if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) { $info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']); } return true; } /** * @param int $id * * @return string|false */ public static function audioFormatLookup($id) { static $lookup = array( 0 => 'Linear PCM, platform endian', 1 => 'ADPCM', 2 => 'mp3', 3 => 'Linear PCM, little endian', 4 => 'Nellymoser 16kHz mono', 5 => 'Nellymoser 8kHz mono', 6 => 'Nellymoser', 7 => 'G.711A-law logarithmic PCM', 8 => 'G.711 mu-law logarithmic PCM', 9 => 'reserved', 10 => 'AAC', 11 => 'Speex', 12 => false, // unknown? 13 => false, // unknown? 14 => 'mp3 8kHz', 15 => 'Device-specific sound', ); return (isset($lookup[$id]) ? $lookup[$id] : false); } /** * @param int $id * * @return int|false */ public static function audioRateLookup($id) { static $lookup = array( 0 => 5500, 1 => 11025, 2 => 22050, 3 => 44100, ); return (isset($lookup[$id]) ? $lookup[$id] : false); } /** * @param int $id * * @return int|false */ public static function audioBitDepthLookup($id) { static $lookup = array( 0 => 8, 1 => 16, ); return (isset($lookup[$id]) ? $lookup[$id] : false); } /** * @param int $id * * @return string|false */ public static function videoCodecLookup($id) { static $lookup = 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',