X-Git-Url: http://git.cyclocoop.org/?a=blobdiff_plain;f=www%2Fplugins-dist%2Fmedias%2Flib%2Fgetid3%2Fmodule.audio.la.php;fp=www%2Fplugins-dist%2Fmedias%2Flib%2Fgetid3%2Fmodule.audio.la.php;h=f46c9aa05d0732f6db2d0dc8fb4c017c99f9a5d1;hb=4f443dce95ff6f8221c189880a70c74ce1c1f238;hp=0000000000000000000000000000000000000000;hpb=4a628e9b277d3617535f99d663ca79fa2e891177;p=lhc%2Fweb%2Fwww.git diff --git a/www/plugins-dist/medias/lib/getid3/module.audio.la.php b/www/plugins-dist/medias/lib/getid3/module.audio.la.php new file mode 100644 index 00000000..f46c9aa0 --- /dev/null +++ b/www/plugins-dist/medias/lib/getid3/module.audio.la.php @@ -0,0 +1,226 @@ + // +// available at http://getid3.sourceforge.net // +// or http://www.getid3.org // +// also https://github.com/JamesHeinrich/getID3 // +///////////////////////////////////////////////////////////////// +// See readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.audio.la.php // +// module for analyzing LA (LosslessAudio) audio files // +// dependencies: module.audio.riff.php // +// /// +///////////////////////////////////////////////////////////////// + +getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); + +class getid3_la extends getid3_handler +{ + + public function Analyze() { + $info = &$this->getid3->info; + + $offset = 0; + $this->fseek($info['avdataoffset']); + $rawdata = $this->fread($this->getid3->fread_buffer_size()); + + switch (substr($rawdata, $offset, 4)) { + case 'LA02': + case 'LA03': + case 'LA04': + $info['fileformat'] = 'la'; + $info['audio']['dataformat'] = 'la'; + $info['audio']['lossless'] = true; + + $info['la']['version_major'] = (int) substr($rawdata, $offset + 2, 1); + $info['la']['version_minor'] = (int) substr($rawdata, $offset + 3, 1); + $info['la']['version'] = (float) $info['la']['version_major'] + ($info['la']['version_minor'] / 10); + $offset += 4; + + $info['la']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + if ($info['la']['uncompressed_size'] == 0) { + $this->error('Corrupt LA file: uncompressed_size == zero'); + return false; + } + + $WAVEchunk = substr($rawdata, $offset, 4); + if ($WAVEchunk !== 'WAVE') { + $this->error('Expected "WAVE" ('.getid3_lib::PrintHexBytes('WAVE').') at offset '.$offset.', found "'.$WAVEchunk.'" ('.getid3_lib::PrintHexBytes($WAVEchunk).') instead.'); + return false; + } + $offset += 4; + + $info['la']['fmt_size'] = 24; + if ($info['la']['version'] >= 0.3) { + + $info['la']['fmt_size'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $info['la']['header_size'] = 49 + $info['la']['fmt_size'] - 24; + $offset += 4; + + } else { + + // version 0.2 didn't support additional data blocks + $info['la']['header_size'] = 41; + + } + + $fmt_chunk = substr($rawdata, $offset, 4); + if ($fmt_chunk !== 'fmt ') { + $this->error('Expected "fmt " ('.getid3_lib::PrintHexBytes('fmt ').') at offset '.$offset.', found "'.$fmt_chunk.'" ('.getid3_lib::PrintHexBytes($fmt_chunk).') instead.'); + return false; + } + $offset += 4; + $fmt_size = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + + $info['la']['raw']['format'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); + $offset += 2; + + $info['la']['channels'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); + $offset += 2; + if ($info['la']['channels'] == 0) { + $this->error('Corrupt LA file: channels == zero'); + return false; + } + + $info['la']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + if ($info['la']['sample_rate'] == 0) { + $this->error('Corrupt LA file: sample_rate == zero'); + return false; + } + + $info['la']['bytes_per_second'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + $info['la']['bytes_per_sample'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); + $offset += 2; + $info['la']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); + $offset += 2; + + $info['la']['samples'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + + $info['la']['raw']['flags'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 1)); + $offset += 1; + $info['la']['flags']['seekable'] = (bool) ($info['la']['raw']['flags'] & 0x01); + if ($info['la']['version'] >= 0.4) { + $info['la']['flags']['high_compression'] = (bool) ($info['la']['raw']['flags'] & 0x02); + } + + $info['la']['original_crc'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + + // mikeØbevin*de + // Basically, the blocksize/seekevery are 61440/19 in La0.4 and 73728/16 + // in earlier versions. A seekpoint is added every blocksize * seekevery + // samples, so 4 * int(totalSamples / (blockSize * seekEvery)) should + // give the number of bytes used for the seekpoints. Of course, if seeking + // is disabled, there are no seekpoints stored. + if ($info['la']['version'] >= 0.4) { + $info['la']['blocksize'] = 61440; + $info['la']['seekevery'] = 19; + } else { + $info['la']['blocksize'] = 73728; + $info['la']['seekevery'] = 16; + } + + $info['la']['seekpoint_count'] = 0; + if ($info['la']['flags']['seekable']) { + $info['la']['seekpoint_count'] = floor($info['la']['samples'] / ($info['la']['blocksize'] * $info['la']['seekevery'])); + + for ($i = 0; $i < $info['la']['seekpoint_count']; $i++) { + $info['la']['seekpoints'][] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + } + } + + if ($info['la']['version'] >= 0.3) { + + // Following the main header information, the program outputs all of the + // seekpoints. Following these is what I called the 'footer start', + // i.e. the position immediately after the La audio data is finished. + $info['la']['footerstart'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); + $offset += 4; + + if ($info['la']['footerstart'] > $info['filesize']) { + $this->warning('FooterStart value points to offset '.$info['la']['footerstart'].' which is beyond end-of-file ('.$info['filesize'].')'); + $info['la']['footerstart'] = $info['filesize']; + } + + } else { + + // La v0.2 didn't have FooterStart value + $info['la']['footerstart'] = $info['avdataend']; + + } + + if ($info['la']['footerstart'] < $info['avdataend']) { + if ($RIFFtempfilename = tempnam(GETID3_TEMP_DIR, 'id3')) { + if ($RIFF_fp = fopen($RIFFtempfilename, 'w+b')) { + $RIFFdata = 'WAVE'; + if ($info['la']['version'] == 0.2) { + $RIFFdata .= substr($rawdata, 12, 24); + } else { + $RIFFdata .= substr($rawdata, 16, 24); + } + if ($info['la']['footerstart'] < $info['avdataend']) { + $this->fseek($info['la']['footerstart']); + $RIFFdata .= $this->fread($info['avdataend'] - $info['la']['footerstart']); + } + $RIFFdata = 'RIFF'.getid3_lib::LittleEndian2String(strlen($RIFFdata), 4, false).$RIFFdata; + fwrite($RIFF_fp, $RIFFdata, strlen($RIFFdata)); + fclose($RIFF_fp); + + $getid3_temp = new getID3(); + $getid3_temp->openfile($RIFFtempfilename); + $getid3_riff = new getid3_riff($getid3_temp); + $getid3_riff->Analyze(); + + if (empty($getid3_temp->info['error'])) { + $info['riff'] = $getid3_temp->info['riff']; + } else { + $this->warning('Error parsing RIFF portion of La file: '.implode($getid3_temp->info['error'])); + } + unset($getid3_temp, $getid3_riff); + } + unlink($RIFFtempfilename); + } + } + + // $info['avdataoffset'] should be zero to begin with, but just in case it's not, include the addition anyway + $info['avdataend'] = $info['avdataoffset'] + $info['la']['footerstart']; + $info['avdataoffset'] = $info['avdataoffset'] + $offset; + + $info['la']['compression_ratio'] = (float) (($info['avdataend'] - $info['avdataoffset']) / $info['la']['uncompressed_size']); + $info['playtime_seconds'] = (float) ($info['la']['samples'] / $info['la']['sample_rate']) / $info['la']['channels']; + if ($info['playtime_seconds'] == 0) { + $this->error('Corrupt LA file: playtime_seconds == zero'); + return false; + } + + $info['audio']['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds']; + //$info['audio']['codec'] = $info['la']['codec']; + $info['audio']['bits_per_sample'] = $info['la']['bits_per_sample']; + break; + + default: + if (substr($rawdata, $offset, 2) == 'LA') { + $this->error('This version of getID3() ['.$this->getid3->version().'] does not support LA version '.substr($rawdata, $offset + 2, 1).'.'.substr($rawdata, $offset + 3, 1).' which this appears to be - check http://getid3.sourceforge.net for updates.'); + } else { + $this->error('Not a LA (Lossless-Audio) file'); + } + return false; + break; + } + + $info['audio']['channels'] = $info['la']['channels']; + $info['audio']['sample_rate'] = (int) $info['la']['sample_rate']; + $info['audio']['encoder'] = 'LA v'.$info['la']['version']; + + return true; + } + +}