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author | Alib <aliboba@free.fr> | 2010-03-15 17:56:22 +0100 |
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committer | Alib <aliboba@free.fr> | 2010-03-15 17:56:22 +0100 |
commit | 438912c0c4a4075a5cd74cf9689451c9df4bbe34 (patch) | |
tree | 334e03bbba01b002a34d3cbf81ee7e600ec7bff6 /getid3/module.audio.la.php | |
parent | a8012963c23e7e5eaf487ee9e192ae5c4d4ccff2 (diff) | |
download | istreamdev-438912c0c4a4075a5cd74cf9689451c9df4bbe34.tar.gz istreamdev-438912c0c4a4075a5cd74cf9689451c9df4bbe34.tar.bz2 |
New Jquery branch. Initial development version for istreamdev 1.0
Diffstat (limited to 'getid3/module.audio.la.php')
-rw-r--r-- | getid3/module.audio.la.php | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/getid3/module.audio.la.php b/getid3/module.audio.la.php deleted file mode 100644 index c1d4f52..0000000 --- a/getid3/module.audio.la.php +++ /dev/null @@ -1,228 +0,0 @@ -<?php -///////////////////////////////////////////////////////////////// -/// getID3() by James Heinrich <info@getid3.org> // -// available at http://getid3.sourceforge.net // -// or http://www.getid3.org // -///////////////////////////////////////////////////////////////// -// See readme.txt for more details // -///////////////////////////////////////////////////////////////// -// // -// module.audio.la.php // -// module for analyzing LA audio files // -// dependencies: module.audio.riff.php // -// /// -///////////////////////////////////////////////////////////////// - -getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); - -class getid3_la -{ - - function getid3_la(&$fd, &$ThisFileInfo) { - $offset = 0; - fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); - $rawdata = fread($fd, GETID3_FREAD_BUFFER_SIZE); - - switch (substr($rawdata, $offset, 4)) { - case 'LA02': - case 'LA03': - case 'LA04': - $ThisFileInfo['fileformat'] = 'la'; - $ThisFileInfo['audio']['dataformat'] = 'la'; - $ThisFileInfo['audio']['lossless'] = true; - - $ThisFileInfo['la']['version_major'] = (int) substr($rawdata, $offset + 2, 1); - $ThisFileInfo['la']['version_minor'] = (int) substr($rawdata, $offset + 3, 1); - $ThisFileInfo['la']['version'] = (float) $ThisFileInfo['la']['version_major'] + ($ThisFileInfo['la']['version_minor'] / 10); - $offset += 4; - - $ThisFileInfo['la']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - if ($ThisFileInfo['la']['uncompressed_size'] == 0) { - $ThisFileInfo['error'][] = 'Corrupt LA file: uncompressed_size == zero'; - return false; - } - - $WAVEchunk = substr($rawdata, $offset, 4); - if ($WAVEchunk !== 'WAVE') { - $ThisFileInfo['error'][] = 'Expected "WAVE" ('.getid3_lib::PrintHexBytes('WAVE').') at offset '.$offset.', found "'.$WAVEchunk.'" ('.getid3_lib::PrintHexBytes($WAVEchunk).') instead.'; - return false; - } - $offset += 4; - - $ThisFileInfo['la']['fmt_size'] = 24; - if ($ThisFileInfo['la']['version'] >= 0.3) { - - $ThisFileInfo['la']['fmt_size'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $ThisFileInfo['la']['header_size'] = 49 + $ThisFileInfo['la']['fmt_size'] - 24; - $offset += 4; - - } else { - - // version 0.2 didn't support additional data blocks - $ThisFileInfo['la']['header_size'] = 41; - - } - - $fmt_chunk = substr($rawdata, $offset, 4); - if ($fmt_chunk !== 'fmt ') { - $ThisFileInfo['error'][] = 'Expected "fmt " ('.getid3_lib::PrintHexBytes('fmt ').') at offset '.$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; - - $ThisFileInfo['la']['raw']['format'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); - $offset += 2; - - $ThisFileInfo['la']['channels'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); - $offset += 2; - if ($ThisFileInfo['la']['channels'] == 0) { - $ThisFileInfo['error'][] = 'Corrupt LA file: channels == zero'; - return false; - } - - $ThisFileInfo['la']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - if ($ThisFileInfo['la']['sample_rate'] == 0) { - $ThisFileInfo['error'][] = 'Corrupt LA file: sample_rate == zero'; - return false; - } - - $ThisFileInfo['la']['bytes_per_second'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - $ThisFileInfo['la']['bytes_per_sample'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); - $offset += 2; - $ThisFileInfo['la']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 2)); - $offset += 2; - - $ThisFileInfo['la']['samples'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - - $ThisFileInfo['la']['raw']['flags'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 1)); - $offset += 1; - $ThisFileInfo['la']['flags']['seekable'] = (bool) ($ThisFileInfo['la']['raw']['flags'] & 0x01); - if ($ThisFileInfo['la']['version'] >= 0.4) { - $ThisFileInfo['la']['flags']['high_compression'] = (bool) ($ThisFileInfo['la']['raw']['flags'] & 0x02); - } - - $ThisFileInfo['la']['original_crc'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - - // mikeØbevin*de - // Basically, the blocksize/seekevery are 61440/19 in La0.4 and 73728/16 - // in earlier versions. A seekpoint is added every blocksize * seekevery - // samples, so 4 * int(totalSamples / (blockSize * seekEvery)) should - // give the number of bytes used for the seekpoints. Of course, if seeking - // is disabled, there are no seekpoints stored. - if ($ThisFileInfo['la']['version'] >= 0.4) { - $ThisFileInfo['la']['blocksize'] = 61440; - $ThisFileInfo['la']['seekevery'] = 19; - } else { - $ThisFileInfo['la']['blocksize'] = 73728; - $ThisFileInfo['la']['seekevery'] = 16; - } - - $ThisFileInfo['la']['seekpoint_count'] = 0; - if ($ThisFileInfo['la']['flags']['seekable']) { - $ThisFileInfo['la']['seekpoint_count'] = floor($ThisFileInfo['la']['samples'] / ($ThisFileInfo['la']['blocksize'] * $ThisFileInfo['la']['seekevery'])); - - for ($i = 0; $i < $ThisFileInfo['la']['seekpoint_count']; $i++) { - $ThisFileInfo['la']['seekpoints'][] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - } - } - - if ($ThisFileInfo['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. - $ThisFileInfo['la']['footerstart'] = getid3_lib::LittleEndian2Int(substr($rawdata, $offset, 4)); - $offset += 4; - - if ($ThisFileInfo['la']['footerstart'] > $ThisFileInfo['filesize']) { - $ThisFileInfo['warning'][] = 'FooterStart value points to offset '.$ThisFileInfo['la']['footerstart'].' which is beyond end-of-file ('.$ThisFileInfo['filesize'].')'; - $ThisFileInfo['la']['footerstart'] = $ThisFileInfo['filesize']; - } - - } else { - - // La v0.2 didn't have FooterStart value - $ThisFileInfo['la']['footerstart'] = $ThisFileInfo['avdataend']; - - } - - if ($ThisFileInfo['la']['footerstart'] < $ThisFileInfo['avdataend']) { - if ($RIFFtempfilename = tempnam('*', 'id3')) { - if ($RIFF_fp = fopen($RIFFtempfilename, 'w+b')) { - $RIFFdata = 'WAVE'; - if ($ThisFileInfo['la']['version'] == 0.2) { - $RIFFdata .= substr($rawdata, 12, 24); - } else { - $RIFFdata .= substr($rawdata, 16, 24); - } - if ($ThisFileInfo['la']['footerstart'] < $ThisFileInfo['avdataend']) { - fseek($fd, $ThisFileInfo['la']['footerstart'], SEEK_SET); - $RIFFdata .= fread($fd, $ThisFileInfo['avdataend'] - $ThisFileInfo['la']['footerstart']); - } - $RIFFdata = 'RIFF'.getid3_lib::LittleEndian2String(strlen($RIFFdata), 4, false).$RIFFdata; - fwrite($RIFF_fp, $RIFFdata, strlen($RIFFdata)); - $dummy = $ThisFileInfo; - $dummy['filesize'] = strlen($RIFFdata); - $dummy['avdataoffset'] = 0; - $dummy['avdataend'] = $dummy['filesize']; - - $riff = new getid3_riff($RIFF_fp, $dummy); - if (empty($dummy['error'])) { - $ThisFileInfo['riff'] = $dummy['riff']; - } else { - $ThisFileInfo['warning'][] = 'Error parsing RIFF portion of La file: '.implode($dummy['error']); - } - unset($riff); - unset($dummy); - fclose($RIFF_fp); - } - unlink($RIFFtempfilename); - } - } - - // $ThisFileInfo['avdataoffset'] should be zero to begin with, but just in case it's not, include the addition anyway - $ThisFileInfo['avdataend'] = $ThisFileInfo['avdataoffset'] + $ThisFileInfo['la']['footerstart']; - $ThisFileInfo['avdataoffset'] = $ThisFileInfo['avdataoffset'] + $offset; - - //$ThisFileInfo['la']['codec'] = RIFFwFormatTagLookup($ThisFileInfo['la']['raw']['format']); - $ThisFileInfo['la']['compression_ratio'] = (float) (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['la']['uncompressed_size']); - $ThisFileInfo['playtime_seconds'] = (float) ($ThisFileInfo['la']['samples'] / $ThisFileInfo['la']['sample_rate']) / $ThisFileInfo['la']['channels']; - if ($ThisFileInfo['playtime_seconds'] == 0) { - $ThisFileInfo['error'][] = 'Corrupt LA file: playtime_seconds == zero'; - return false; - } - - $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['playtime_seconds']; - //$ThisFileInfo['audio']['codec'] = $ThisFileInfo['la']['codec']; - $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['la']['bits_per_sample']; - break; - - default: - if (substr($rawdata, $offset, 2) == 'LA') { - $ThisFileInfo['error'][] = 'This version of getID3() (v'.GETID3_VERSION.') doesn\'t support LA version '.substr($rawdata, $offset + 2, 1).'.'.substr($rawdata, $offset + 3, 1).' which this appears to be - check http://getid3.sourceforge.net for updates.'; - } else { - $ThisFileInfo['error'][] = 'Not a LA (Lossless-Audio) file'; - } - return false; - break; - } - - $ThisFileInfo['audio']['channels'] = $ThisFileInfo['la']['channels']; - $ThisFileInfo['audio']['sample_rate'] = (int) $ThisFileInfo['la']['sample_rate']; - $ThisFileInfo['audio']['encoder'] = 'LA v'.$ThisFileInfo['la']['version']; - - return true; - } - -} - - -?>
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