function getOggHeaderFilepointer(&$fd, &$ThisFileInfo) { $ThisFileInfo['fileformat'] = 'ogg'; // Warn about illegal tags - only vorbiscomments are allowed if (isset($ThisFileInfo['id3v2'])) { $ThisFileInfo['warning'] .= "\n" . 'Illegal ID3v2 tag present.'; } if (isset($ThisFileInfo['id3v1'])) { $ThisFileInfo['warning'] .= "\n" . 'Illegal ID3v1 tag present.'; } if (isset($ThisFileInfo['ape'])) { $ThisFileInfo['warning'] .= "\n" . 'Illegal APE tag present.'; } // Page 1 - Stream Header fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); $oggpageinfo = ParseOggPageHeader($fd); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; if (ftell($fd) >= FREAD_BUFFER_SIZE) { $ThisFileInfo['error'] .= "\n" . 'Could not find start of Ogg page in the first ' . FREAD_BUFFER_SIZE . ' bytes (this might not be an Ogg-Vorbis file?)'; unset($ThisFileInfo['fileformat']); unset($ThisFileInfo['ogg']); return false; } $filedata = fread($fd, $oggpageinfo['page_length']); $filedataoffset = 0; if (substr($filedata, 0, 4) == 'fLaC') { $ThisFileInfo['audio']['dataformat'] = 'flac'; $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; } elseif (substr($filedata, 1, 6) == 'vorbis') { $ThisFileInfo['audio']['dataformat'] = 'vorbis'; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' $filedataoffset += 6; $ThisFileInfo['ogg']['bitstreamversion'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['numberofchannels'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels']; $ThisFileInfo['ogg']['samplerate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; if ($ThisFileInfo['ogg']['samplerate'] == 0) { $ThisFileInfo['error'] .= "\n" . 'Corrupt Ogg file: sample rate == zero'; return false; } $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate']; $ThisFileInfo['ogg']['samples'] = 0; // filled in later $ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later $ThisFileInfo['ogg']['bitrate_max'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_nominal'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_min'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['blocksize_small'] = pow(2, LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xf); $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xf0) >> 4); $ThisFileInfo['ogg']['stop_bit'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr if ($ThisFileInfo['ogg']['bitrate_max'] == 4294967295.0) { unset($ThisFileInfo['ogg']['bitrate_max']); $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; } if ($ThisFileInfo['ogg']['bitrate_nominal'] == 4294967295.0) { unset($ThisFileInfo['ogg']['bitrate_nominal']); } if ($ThisFileInfo['ogg']['bitrate_min'] == 4294967295.0) { unset($ThisFileInfo['ogg']['bitrate_min']); $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; } } elseif (substr($filedata, 0, 8) == 'Speex ') { // http://www.speex.org/manual/node10.html $ThisFileInfo['audio']['dataformat'] = 'speex'; $ThisFileInfo['mime_type'] = 'audio/speex'; $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' $filedataoffset += 8; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); $filedataoffset += 20; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); $ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; $ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; $ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; $ThisFileInfo['speex']['band_type'] = SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate']; $ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels']; if ($ThisFileInfo['speex']['vbr']) { $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; } } else { $ThisFileInfo['error'] .= "\n" . 'Expecting either "Speex " or "vorbis" identifier strings, found neither'; unset($ThisFileInfo['ogg']); unset($ThisFileInfo['mime_type']); return false; } // Page 2 - Comment Header $oggpageinfo = ParseOggPageHeader($fd); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; switch ($ThisFileInfo['audio']['dataformat']) { case 'vorbis': $filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = LittleEndian2Int(substr($filedata, 0, 1)); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; case 'flac': require_once GETID3_INCLUDEPATH . 'getid3.flac.php'; if (!FLACparseMETAdata($fd, $ThisFileInfo)) { $ThisFileInfo['error'] .= "\n" . 'Failed to parse FLAC headers'; return false; } break; case 'speex': fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; } // Last Page - Number of Samples fseek($fd, max($ThisFileInfo['avdataend'] - FREAD_BUFFER_SIZE, 0), SEEK_SET); $LastChunkOfOgg = strrev(fread($fd, FREAD_BUFFER_SIZE)); if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { fseek($fd, 0 - ($LastOggSpostion + strlen('SggO')), SEEK_END); $ThisFileInfo['avdataend'] = ftell($fd); $ThisFileInfo['ogg']['pageheader']['eos'] = ParseOggPageHeader($fd); $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position']; if ($ThisFileInfo['ogg']['samples'] == 0) { $ThisFileInfo['error'] .= "\n" . 'Corrupt Ogg file: eos.number of samples == zero'; return false; } $ThisFileInfo['ogg']['bitrate_average'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']); } if (isset($ThisFileInfo['ogg']['bitrate_average']) && $ThisFileInfo['ogg']['bitrate_average'] > 0) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average']; } elseif (isset($ThisFileInfo['ogg']['bitrate_nominal']) && $ThisFileInfo['ogg']['bitrate_nominal'] > 0) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal']; } elseif (isset($ThisFileInfo['ogg']['bitrate_min']) && isset($ThisFileInfo['ogg']['bitrate_max'])) { $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2; } if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) { if ($ThisFileInfo['audio']['bitrate'] == 0) { $ThisFileInfo['error'] .= "\n" . 'Corrupt Ogg file: bitrate_audio == zero'; return false; } $ThisFileInfo['playtime_seconds'] = (double) (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['audio']['bitrate']); } if (isset($ThisFileInfo['ogg']['vendor'])) { $ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']); } return true; }
function FLACparseMETAdata(&$fd, &$ThisFileInfo) { do { $METAdataBlockOffset = ftell($fd); $METAdataBlockHeader = fread($fd, 4); $METAdataLastBlockFlag = (bool) (BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x80); $METAdataBlockType = BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x7f; $METAdataBlockLength = BigEndian2Int(substr($METAdataBlockHeader, 1, 3)); $METAdataBlockTypeText = FLACmetaBlockTypeLookup($METAdataBlockType); $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['offset'] = $METAdataBlockOffset; $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['last_meta_block'] = $METAdataLastBlockFlag; $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_type'] = $METAdataBlockType; $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_type_text'] = $METAdataBlockTypeText; $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_length'] = $METAdataBlockLength; $ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_data'] = fread($fd, $METAdataBlockLength); $ThisFileInfo['avdataoffset'] = ftell($fd); switch ($METAdataBlockTypeText) { case 'STREAMINFO': if (!FLACparseSTREAMINFO($ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_data'], $ThisFileInfo)) { return false; } break; case 'PADDING': // ignore break; case 'APPLICATION': if (!FLACparseAPPLICATION($ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_data'], $ThisFileInfo)) { return false; } break; case 'SEEKTABLE': if (!FLACparseSEEKTABLE($ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_data'], $ThisFileInfo)) { return false; } break; case 'VORBIS_COMMENT': require_once GETID3_INCLUDEPATH . 'getid3.ogg.php'; //ParseVorbisComments($ThisFileInfo['flac']["$METAdataBlockTypeText"]['raw']['block_data'], $ThisFileInfo, $METAdataBlockOffset, $fd); $OldOffset = ftell($fd); fseek($fd, 0 - $METAdataBlockLength, SEEK_CUR); ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); fseek($fd, $OldOffset, SEEK_SET); break; case 'CUESHEET': if (!FLACparseCUESHEET($ThisFileInfo['flac']["{$METAdataBlockTypeText}"]['raw']['block_data'], $ThisFileInfo)) { return false; } break; default: $ThisFileInfo['warning'] .= "\n" . 'Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE (' . $METAdataBlockType . ') at offset ' . $METAdataBlockOffset; break; } } while ($METAdataLastBlockFlag === false); if (isset($ThisFileInfo['flac']['STREAMINFO'])) { $ThisFileInfo['flac']['compressed_audio_bytes'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']; $ThisFileInfo['flac']['uncompressed_audio_bytes'] = $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] * $ThisFileInfo['flac']['STREAMINFO']['channels'] * ($ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'] / 8); if ($ThisFileInfo['flac']['uncompressed_audio_bytes'] == 0) { $ThisFileInfo['error'] .= "\n" . 'Corrupt FLAC file: uncompressed_audio_bytes == zero'; return false; } $ThisFileInfo['flac']['compression_ratio'] = $ThisFileInfo['flac']['compressed_audio_bytes'] / $ThisFileInfo['flac']['uncompressed_audio_bytes']; } // set md5_data - built into flac 0.5+ if (isset($ThisFileInfo['flac']['STREAMINFO']['audio_signature'])) { if ($ThisFileInfo['flac']['STREAMINFO']['audio_signature'] === str_repeat(chr(0), 16)) { $ThisFileInfo['warning'] .= "\n" . 'FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC), using calculated md5_data'; } else { $ThisFileInfo['md5_data'] = ''; $md5 = $ThisFileInfo['flac']['STREAMINFO']['audio_signature']; for ($i = 0; $i < strlen($md5); $i++) { $ThisFileInfo['md5_data'] .= str_pad(dechex(ord($md5[$i])), 2, '00', STR_PAD_LEFT); } if (!preg_match('/^[0-9a-f]{32}$/', $ThisFileInfo['md5_data'])) { unset($ThisFileInfo['md5_data']); } } } $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample']; if (!empty($ThisFileInfo['ogg']['vendor'])) { $ThisFileInfo['audio']['encoder'] = $ThisFileInfo['ogg']['vendor']; } return true; }