Mercurial > judyates
view e2gallerypro/e2upload/Backend/Assets/getid3/module.audio-video.real.php @ 28:118cb614cf18 judyates tip
judy bio.
| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Tue, 29 Dec 2015 16:26:18 -0800 |
| parents | 3f6b44aa6b35 |
| children |
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1 <?php2 // +----------------------------------------------------------------------+3 // | PHP version 5 |4 // +----------------------------------------------------------------------+5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |6 // +----------------------------------------------------------------------+7 // | This source file is subject to version 2 of the GPL license, |8 // | that is bundled with this package in the file license.txt and is |9 // | available through the world-wide-web at the following url: |10 // | http://www.gnu.org/copyleft/gpl.html |11 // +----------------------------------------------------------------------+12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |13 // +----------------------------------------------------------------------+14 // | Authors: James Heinrich <infoØgetid3*org> |15 // | Allan Hansen <ahØartemis*dk> |16 // +----------------------------------------------------------------------+17 // | module.audio-video.real.php |18 // | Module for analyzing Real Audio/Video files |19 // | dependencies: module.audio-video.riff.php |20 // +----------------------------------------------------------------------+21 //22 // $Id: module.audio-video.real.php,v 1.4 2006/11/02 10:48:00 ah Exp $26 class getid3_real extends getid3_handler27 {29 public function Analyze() {31 $getid3 = $this->getid3;33 $getid3->include_module('audio-video.riff');35 $getid3->info['fileformat'] = 'real';36 $getid3->info['bitrate'] = 0;37 $getid3->info['playtime_seconds'] = 0;39 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);40 $chunk_counter = 0;42 while (ftell($getid3->fp) < $getid3->info['avdataend']) {44 $chunk_data = fread($getid3->fp, 8);45 $chunk_name = substr($chunk_data, 0, 4);46 $chunk_size = getid3_lib::BigEndian2Int(substr($chunk_data, 4, 4));48 if ($chunk_name == '.ra'."\xFD") {49 $chunk_data .= fread($getid3->fp, $chunk_size - 8);51 if ($this->ParseOldRAheader(substr($chunk_data, 0, 128), $getid3->info['real']['old_ra_header'])) {53 $getid3->info['audio']['dataformat'] = 'real';54 $getid3->info['audio']['lossless'] = false;55 $getid3->info['audio']['sample_rate'] = $getid3->info['real']['old_ra_header']['sample_rate'];56 $getid3->info['audio']['bits_per_sample'] = $getid3->info['real']['old_ra_header']['bits_per_sample'];57 $getid3->info['audio']['channels'] = $getid3->info['real']['old_ra_header']['channels'];59 $getid3->info['playtime_seconds'] = 60 * ($getid3->info['real']['old_ra_header']['audio_bytes'] / $getid3->info['real']['old_ra_header']['bytes_per_minute']);60 $getid3->info['audio']['bitrate'] = 8 * ($getid3->info['real']['old_ra_header']['audio_bytes'] / $getid3->info['playtime_seconds']);61 $getid3->info['audio']['codec'] = $this->RealAudioCodecFourCClookup($getid3->info['real']['old_ra_header']['fourcc'], $getid3->info['audio']['bitrate']);63 foreach ($getid3->info['real']['old_ra_header']['comments'] as $key => $value_array) {65 if (strlen(trim($value_array[0])) > 0) {66 $getid3->info['real']['comments'][$key][] = trim($value_array[0]);67 }68 }69 return true;70 }72 throw new getid3_exception('There was a problem parsing this RealAudio file. Please submit it for analysis to http://www.getid3.org/upload/ or info@getid3.org');73 }75 $getid3->info['real']['chunks'][$chunk_counter] = array ();76 $info_real_chunks_current_chunk = &$getid3->info['real']['chunks'][$chunk_counter];78 $info_real_chunks_current_chunk['name'] = $chunk_name;79 $info_real_chunks_current_chunk['offset'] = ftell($getid3->fp) - 8;80 $info_real_chunks_current_chunk['length'] = $chunk_size;82 if (($info_real_chunks_current_chunk['offset'] + $info_real_chunks_current_chunk['length']) > $getid3->info['avdataend']) {83 $getid3->warning('Chunk "'.$info_real_chunks_current_chunk['name'].'" at offset '.$info_real_chunks_current_chunk['offset'].' claims to be '.$info_real_chunks_current_chunk['length'].' bytes long, which is beyond end of file');84 return false;85 }87 if ($chunk_size > (getid3::FREAD_BUFFER_SIZE + 8)) {88 $chunk_data .= fread($getid3->fp, getid3::FREAD_BUFFER_SIZE - 8);89 fseek($getid3->fp, $info_real_chunks_current_chunk['offset'] + $chunk_size, SEEK_SET);91 } elseif(($chunk_size - 8) > 0) {92 $chunk_data .= fread($getid3->fp, $chunk_size - 8);93 }94 $offset = 8;96 switch ($chunk_name) {98 case '.RMF': // RealMedia File Header100 $info_real_chunks_current_chunk['object_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));101 $offset += 2;103 switch ($info_real_chunks_current_chunk['object_version']) {105 case 0:106 $info_real_chunks_current_chunk['file_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 4));107 $offset += 4;109 $info_real_chunks_current_chunk['headers_count'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 4));110 $offset += 4;111 break;113 default:114 //$getid3->warning('Expected .RMF-object_version to be "0", actual value is "'.$info_real_chunks_current_chunk['object_version'].'" (should not be a problem)';115 break;117 }118 break;121 case 'PROP': // Properties Header123 $info_real_chunks_current_chunk['object_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));124 $offset += 2;126 if ($info_real_chunks_current_chunk['object_version'] == 0) {128 getid3_lib::ReadSequence('BigEndian2Int', $info_real_chunks_current_chunk, $chunk_data, $offset,129 array (130 'max_bit_rate' => 4,131 'avg_bit_rate' => 4,132 'max_packet_size' => 4,133 'avg_packet_size' => 4,134 'num_packets' => 4,135 'duration' => 4,136 'preroll' => 4,137 'index_offset' => 4,138 'data_offset' => 4,139 'num_streams' => 2,140 'flags_raw' => 2141 )142 );143 $offset += 40;145 $getid3->info['playtime_seconds'] = $info_real_chunks_current_chunk['duration'] / 1000;146 if ($info_real_chunks_current_chunk['duration'] > 0) {147 $getid3->info['bitrate'] += $info_real_chunks_current_chunk['avg_bit_rate'];148 }150 $info_real_chunks_current_chunk['flags']['save_enabled'] = (bool)($info_real_chunks_current_chunk['flags_raw'] & 0x0001);151 $info_real_chunks_current_chunk['flags']['perfect_play'] = (bool)($info_real_chunks_current_chunk['flags_raw'] & 0x0002);152 $info_real_chunks_current_chunk['flags']['live_broadcast'] = (bool)($info_real_chunks_current_chunk['flags_raw'] & 0x0004);153 }154 break;157 case 'MDPR': // Media Properties Header159 $info_real_chunks_current_chunk['object_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));160 $offset += 2;162 if ($info_real_chunks_current_chunk['object_version'] == 0) {164 getid3_lib::ReadSequence('BigEndian2Int', $info_real_chunks_current_chunk, $chunk_data, $offset,165 array (166 'stream_number' => 2,167 'max_bit_rate' => 4,168 'avg_bit_rate' => 4,169 'max_packet_size' => 4,170 'avg_packet_size' => 4,171 'start_time' => 4,172 'preroll' => 4,173 'duration' => 4,174 'stream_name_size' => 1175 )176 );177 $offset += 31;179 $info_real_chunks_current_chunk['stream_name'] = substr($chunk_data, $offset, $info_real_chunks_current_chunk['stream_name_size']);180 $offset += $info_real_chunks_current_chunk['stream_name_size'];182 $info_real_chunks_current_chunk['mime_type_size'] = getid3_lib::BigEndian2Int($chunk_data{$offset++});184 $info_real_chunks_current_chunk['mime_type'] = substr($chunk_data, $offset, $info_real_chunks_current_chunk['mime_type_size']);185 $offset += $info_real_chunks_current_chunk['mime_type_size'];187 $info_real_chunks_current_chunk['type_specific_len'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 4));188 $offset += 4;190 $info_real_chunks_current_chunk['type_specific_data'] = substr($chunk_data, $offset, $info_real_chunks_current_chunk['type_specific_len']);191 $offset += $info_real_chunks_current_chunk['type_specific_len'];193 $info_real_chunks_current_chunk_typespecificdata = &$info_real_chunks_current_chunk['type_specific_data'];195 switch ($info_real_chunks_current_chunk['mime_type']) {197 case 'video/x-pn-realvideo':198 case 'video/x-pn-multirate-realvideo':199 // http://www.freelists.org/archives/matroska-devel/07-2003/msg00010.html201 $info_real_chunks_current_chunk['video_info'] = array ();202 $info_real_chunks_current_chunk_video_info = &$info_real_chunks_current_chunk['video_info'];204 getid3_lib::ReadSequence('BigEndian2Int', $info_real_chunks_current_chunk_video_info, $info_real_chunks_current_chunk_typespecificdata, 0,205 array (206 'dwSize' => 4,207 'fourcc1' => -4,208 'fourcc2' => -4,209 'width' => 2,210 'height' => 2,211 'bits_per_sample' => 2,212 'IGNORE-unknown1' => 2,213 'IGNORE-unknown2' => 2,214 'frames_per_second' => 2,215 'IGNORE-unknown3' => 2,216 'IGNORE-unknown4' => 2,217 'IGNORE-unknown5' => 2,218 'IGNORE-unknown6' => 2,219 'IGNORE-unknown7' => 2,220 'IGNORE-unknown8' => 2,221 'IGNORE-unknown9' => 2222 )223 );225 $info_real_chunks_current_chunk_video_info['codec'] = getid3_riff::RIFFfourccLookup($info_real_chunks_current_chunk_video_info['fourcc2']);227 $getid3->info['video']['resolution_x'] = $info_real_chunks_current_chunk_video_info['width'];228 $getid3->info['video']['resolution_y'] = $info_real_chunks_current_chunk_video_info['height'];229 $getid3->info['video']['frame_rate'] = (float)$info_real_chunks_current_chunk_video_info['frames_per_second'];230 $getid3->info['video']['codec'] = $info_real_chunks_current_chunk_video_info['codec'];231 $getid3->info['video']['bits_per_sample'] = $info_real_chunks_current_chunk_video_info['bits_per_sample'];232 break;235 case 'audio/x-pn-realaudio':236 case 'audio/x-pn-multirate-realaudio':238 $this->ParseOldRAheader($info_real_chunks_current_chunk_typespecificdata, $info_real_chunks_current_chunk['parsed_audio_data']);240 $getid3->info['audio']['sample_rate'] = $info_real_chunks_current_chunk['parsed_audio_data']['sample_rate'];241 $getid3->info['audio']['bits_per_sample'] = $info_real_chunks_current_chunk['parsed_audio_data']['bits_per_sample'];242 $getid3->info['audio']['channels'] = $info_real_chunks_current_chunk['parsed_audio_data']['channels'];244 if (!empty($getid3->info['audio']['dataformat'])) {245 foreach ($getid3->info['audio'] as $key => $value) {246 if ($key != 'streams') {247 $getid3->info['audio']['streams'][$info_real_chunks_current_chunk['stream_number']][$key] = $value;248 }249 }250 }251 break;254 case 'logical-fileinfo':256 $info_real_chunks_current_chunk['logical_fileinfo']['logical_fileinfo_length'] = getid3_lib::BigEndian2Int(substr($info_real_chunks_current_chunk_typespecificdata, 0, 4));257 // $info_real_chunks_current_chunk['logical_fileinfo']['IGNORE-unknown1'] = getid3_lib::BigEndian2Int(substr($info_real_chunks_current_chunk_typespecificdata, 4, 4));258 $info_real_chunks_current_chunk['logical_fileinfo']['num_tags'] = getid3_lib::BigEndian2Int(substr($info_real_chunks_current_chunk_typespecificdata, 8, 4));259 // $info_real_chunks_current_chunk['logical_fileinfo']['IGNORE-unknown2'] = getid3_lib::BigEndian2Int(substr($info_real_chunks_current_chunk_typespecificdata, 12, 4));260 break;262 }265 if (empty($getid3->info['playtime_seconds'])) {266 $getid3->info['playtime_seconds'] = max($getid3->info['playtime_seconds'], ($info_real_chunks_current_chunk['duration'] + $info_real_chunks_current_chunk['start_time']) / 1000);267 }269 if ($info_real_chunks_current_chunk['duration'] > 0) {271 switch ($info_real_chunks_current_chunk['mime_type']) {273 case 'audio/x-pn-realaudio':274 case 'audio/x-pn-multirate-realaudio':276 $getid3->info['audio']['bitrate'] = (isset($getid3->info['audio']['bitrate']) ? $getid3->info['audio']['bitrate'] : 0) + $info_real_chunks_current_chunk['avg_bit_rate'];277 $getid3->info['audio']['codec'] = $this->RealAudioCodecFourCClookup($info_real_chunks_current_chunk['parsed_audio_data']['fourcc'], $getid3->info['audio']['bitrate']);278 $getid3->info['audio']['dataformat'] = 'real';279 $getid3->info['audio']['lossless'] = false;280 break;283 case 'video/x-pn-realvideo':284 case 'video/x-pn-multirate-realvideo':286 $getid3->info['video']['bitrate'] = (isset($getid3->info['video']['bitrate']) ? $getid3->info['video']['bitrate'] : 0) + $info_real_chunks_current_chunk['avg_bit_rate'];287 $getid3->info['video']['bitrate_mode'] = 'cbr';288 $getid3->info['video']['dataformat'] = 'real';289 $getid3->info['video']['lossless'] = false;290 $getid3->info['video']['pixel_aspect_ratio'] = (float)1;291 break;294 case 'audio/x-ralf-mpeg4-generic':296 $getid3->info['audio']['bitrate'] = (isset($getid3->info['audio']['bitrate']) ? $getid3->info['audio']['bitrate'] : 0) + $info_real_chunks_current_chunk['avg_bit_rate'];297 $getid3->info['audio']['codec'] = 'RealAudio Lossless';298 $getid3->info['audio']['dataformat'] = 'real';299 $getid3->info['audio']['lossless'] = true;300 break;302 }304 $getid3->info['bitrate'] = (isset($getid3->info['video']['bitrate']) ? $getid3->info['video']['bitrate'] : 0) + (isset($getid3->info['audio']['bitrate']) ? $getid3->info['audio']['bitrate'] : 0);305 }306 }307 break;310 case 'CONT': // Content Description Header (text comments)312 $info_real_chunks_current_chunk['object_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));313 $offset += 2;315 if ($info_real_chunks_current_chunk['object_version'] == 0) {317 $info_real_chunks_current_chunk['title_len'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));318 $offset += 2;320 $info_real_chunks_current_chunk['title'] = (string) substr($chunk_data, $offset, $info_real_chunks_current_chunk['title_len']);321 $offset += $info_real_chunks_current_chunk['title_len'];323 $info_real_chunks_current_chunk['artist_len'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));324 $offset += 2;326 $info_real_chunks_current_chunk['artist'] = (string) substr($chunk_data, $offset, $info_real_chunks_current_chunk['artist_len']);327 $offset += $info_real_chunks_current_chunk['artist_len'];329 $info_real_chunks_current_chunk['copyright_len'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));330 $offset += 2;332 $info_real_chunks_current_chunk['copyright'] = (string) substr($chunk_data, $offset, $info_real_chunks_current_chunk['copyright_len']);333 $offset += $info_real_chunks_current_chunk['copyright_len'];335 $info_real_chunks_current_chunk['comment_len'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));336 $offset += 2;338 $info_real_chunks_current_chunk['comment'] = (string) substr($chunk_data, $offset, $info_real_chunks_current_chunk['comment_len']);339 $offset += $info_real_chunks_current_chunk['comment_len'];341 foreach (array ('title'=>'title', 'artist'=>'artist', 'copyright'=>'copyright', 'comment'=>'comment') as $key => $val) {342 if ($info_real_chunks_current_chunk[$key]) {343 $getid3->info['real']['comments'][$val][] = trim($info_real_chunks_current_chunk[$key]);344 }345 }346 }347 break;350 case 'DATA': // Data Chunk Header352 // do nothing353 break;356 case 'INDX': // Index Section Header358 $info_real_chunks_current_chunk['object_version'] = getid3_lib::BigEndian2Int(substr($chunk_data, $offset, 2));359 $offset += 2;361 if ($info_real_chunks_current_chunk['object_version'] == 0) {363 getid3_lib::ReadSequence('BigEndian2Int', $info_real_chunks_current_chunk, $chunk_data, $offset,364 array (365 'num_indices' => 4,366 'stream_number' => 2,367 'next_index_header' => 4368 )369 );370 $offset += 10;372 if ($info_real_chunks_current_chunk['next_index_header'] == 0) {373 // last index chunk found, ignore rest of file374 break 2;375 } else {376 // non-last index chunk, seek to next index chunk (skipping actual index data)377 fseek($getid3->fp, $info_real_chunks_current_chunk['next_index_header'], SEEK_SET);378 }379 }380 break;383 default:384 $getid3->warning('Unhandled RealMedia chunk "'.$chunk_name.'" at offset '.$info_real_chunks_current_chunk['offset']);385 break;386 }387 $chunk_counter++;388 }390 if (!empty($getid3->info['audio']['streams'])) {392 $getid3->info['audio']['bitrate'] = 0;394 foreach ($getid3->info['audio']['streams'] as $key => $value_array) {395 $getid3->info['audio']['bitrate'] += $value_array['bitrate'];396 }397 }399 return true;400 }404 public static function ParseOldRAheader($old_ra_header_data, &$parsed_array) {406 // http://www.freelists.org/archives/matroska-devel/07-2003/msg00010.html408 $parsed_array = array ();409 $parsed_array['magic'] = substr($old_ra_header_data, 0, 4);411 if ($parsed_array['magic'] != '.ra'."\xFD") {412 return false;413 }415 $parsed_array['version1'] = getid3_lib::BigEndian2Int(substr($old_ra_header_data, 4, 2));417 if ($parsed_array['version1'] < 3) {419 return false;420 }422 if ($parsed_array['version1'] == 3) {424 $parsed_array['fourcc1'] = '.ra3';425 $parsed_array['bits_per_sample'] = 16; // hard-coded for old versions?426 $parsed_array['sample_rate'] = 8000; // hard-coded for old versions?428 getid3_lib::ReadSequence('BigEndian2Int', $parsed_array, $old_ra_header_data, 6,429 array (430 'header_size' => 2,431 'channels' => 2, // always 1 (?)432 'IGNORE-unknown1' => 2,433 'IGNORE-unknown2' => 2,434 'IGNORE-unknown3' => 2,435 'bytes_per_minute' => 2,436 'audio_bytes' => 4,437 )438 );440 $parsed_array['comments_raw'] = substr($old_ra_header_data, 22, $parsed_array['header_size'] - 22 + 1); // not including null terminator442 $comment_offset = 0;444 foreach (array ('title', 'artist', 'copyright') as $name) {445 $comment_length = getid3_lib::BigEndian2Int($parsed_array['comments_raw']{$comment_offset++});446 $parsed_array['comments'][$name][]= substr($parsed_array['comments_raw'], $comment_offset, $comment_length);447 $comment_offset += $comment_length;448 }450 $comment_offset++; // final null terminator (?)451 $comment_offset++; // fourcc length (?) should be 4453 $parsed_array['fourcc'] = substr($old_ra_header_data, 23 + $comment_offset, 4);456 } elseif ($parsed_array['version1'] <= 5) {458 getid3_lib::ReadSequence('BigEndian2Int', $parsed_array, $old_ra_header_data, 6,459 array (460 'IGNORE-unknown1' => 2,461 'fourcc1' => -4,462 'file_size' => 4,463 'version2' => 2,464 'header_size' => 4,465 'codec_flavor_id' => 2,466 'coded_frame_size' => 4,467 'audio_bytes' => 4,468 'bytes_per_minute' => 4,469 'IGNORE-unknown5' => 4,470 'sub_packet_h' => 2,471 'frame_size' => 2,472 'sub_packet_size' => 2,473 'IGNORE-unknown6' => 2474 )475 );477 switch ($parsed_array['version1']) {479 case 4:481 getid3_lib::ReadSequence('BigEndian2Int', $parsed_array, $old_ra_header_data, 48,482 array (483 'sample_rate' => 2,484 'IGNORE-unknown8' => 2,485 'bits_per_sample' => 2,486 'channels' => 2,487 'length_fourcc2' => 1,488 'fourcc2' => -4,489 'length_fourcc3' => 1,490 'fourcc3' => -4,491 'IGNORE-unknown9' => 1,492 'IGNORE-unknown10' => 2,493 )494 );496 $parsed_array['comments_raw'] = substr($old_ra_header_data, 69, $parsed_array['header_size'] - 69 + 16);498 $comment_offset = 0;500 foreach (array ('title', 'artist', 'copyright') as $name) {501 $comment_length = getid3_lib::BigEndian2Int($parsed_array['comments_raw']{$comment_offset++});502 $parsed_array['comments'][$name][]= substr($parsed_array['comments_raw'], $comment_offset, $comment_length);503 $comment_offset += $comment_length;504 }505 break;508 case 5:510 getid3_lib::ReadSequence('BigEndian2Int', $parsed_array, $old_ra_header_data, 48,511 array (512 'sample_rate' => 4,513 'sample_rate2' => 4,514 'bits_per_sample' => 4,515 'channels' => 2,516 'genr' => -4,517 'fourcc3' => -4,518 )519 );520 $parsed_array['comments'] = array ();521 break;523 }525 $parsed_array['fourcc'] = $parsed_array['fourcc3'];527 }529 foreach ($parsed_array['comments'] as $key => $value) {531 if ($parsed_array['comments'][$key][0] === false) {532 $parsed_array['comments'][$key][0] = '';533 }534 }536 return true;537 }541 public static function RealAudioCodecFourCClookup($fourcc, $bitrate) {543 // http://www.its.msstate.edu/net/real/reports/config/tags.stats544 // http://www.freelists.org/archives/matroska-devel/06-2003/fullthread18.html546 static $lookup;548 if (empty($lookup)) {549 $lookup['14_4'][8000] = 'RealAudio v2 (14.4kbps)';550 $lookup['14.4'][8000] = 'RealAudio v2 (14.4kbps)';551 $lookup['lpcJ'][8000] = 'RealAudio v2 (14.4kbps)';552 $lookup['28_8'][15200] = 'RealAudio v2 (28.8kbps)';553 $lookup['28.8'][15200] = 'RealAudio v2 (28.8kbps)';554 $lookup['sipr'][4933] = 'RealAudio v4 (5kbps Voice)';555 $lookup['sipr'][6444] = 'RealAudio v4 (6.5kbps Voice)';556 $lookup['sipr'][8444] = 'RealAudio v4 (8.5kbps Voice)';557 $lookup['sipr'][16000] = 'RealAudio v4 (16kbps Wideband)';558 $lookup['dnet'][8000] = 'RealAudio v3 (8kbps Music)';559 $lookup['dnet'][16000] = 'RealAudio v3 (16kbps Music Low Response)';560 $lookup['dnet'][15963] = 'RealAudio v3 (16kbps Music Mid/High Response)';561 $lookup['dnet'][20000] = 'RealAudio v3 (20kbps Music Stereo)';562 $lookup['dnet'][32000] = 'RealAudio v3 (32kbps Music Mono)';563 $lookup['dnet'][31951] = 'RealAudio v3 (32kbps Music Stereo)';564 $lookup['dnet'][39965] = 'RealAudio v3 (40kbps Music Mono)';565 $lookup['dnet'][40000] = 'RealAudio v3 (40kbps Music Stereo)';566 $lookup['dnet'][79947] = 'RealAudio v3 (80kbps Music Mono)';567 $lookup['dnet'][80000] = 'RealAudio v3 (80kbps Music Stereo)';569 $lookup['dnet'][0] = 'RealAudio v3';570 $lookup['sipr'][0] = 'RealAudio v4';571 $lookup['cook'][0] = 'RealAudio G2';572 $lookup['atrc'][0] = 'RealAudio 8';573 }575 $round_bitrate = intval(round($bitrate));577 if (isset($lookup[$fourcc][$round_bitrate])) {578 return $lookup[$fourcc][$round_bitrate];579 }581 if (isset($lookup[$fourcc][0])) {582 return $lookup[$fourcc][0];583 }585 return $fourcc;586 }588 }591 ?>