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<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <[email protected]> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.tta.php // // module for analyzing TTA Audio files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_tta extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'tta'; $info['audio']['dataformat'] = 'tta'; $info['audio']['lossless'] = true; $info['audio']['bitrate_mode'] = 'vbr'; $this->fseek($info['avdataoffset']); $ttaheader = $this->fread(26); $info['tta']['magic'] = substr($ttaheader, 0, 3); $magic = 'TTA'; if ($info['tta']['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['tta']['magic']).'"'); unset($info['fileformat']); unset($info['audio']); unset($info['tta']); return false; } switch ($ttaheader[3]) { case "\x01": // TTA v1.x case "\x02": // TTA v1.x case "\x03": // TTA v1.x // "It was the demo-version of the TTA encoder. There is no released format with such header. TTA encoder v1 is not supported about a year." $info['tta']['major_version'] = 1; $info['avdataoffset'] += 16; $info['tta']['compression_level'] = ord($ttaheader[3]); $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2)); $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2)); $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 4)); $info['tta']['samples_per_channel'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4)); $info['audio']['encoder_options'] = '-e'.$info['tta']['compression_level']; $info['playtime_seconds'] = $info['tta']['samples_per_channel'] / $info['tta']['sample_rate']; break; case '2': // TTA v2.x // "I have hurried to release the TTA 2.0 encoder. Format documentation is removed from our site. This format still in development. Please wait the TTA2 format, encoder v4." $info['tta']['major_version'] = 2; $info['avdataoffset'] += 20; $info['tta']['compression_level'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2)); $info['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2)); $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2)); $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 2)); $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4)); $info['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 16, 4)); $info['audio']['encoder_options'] = '-e'.$info['tta']['compression_level']; $info['playtime_seconds'] = $info['tta']['data_length'] / $info['tta']['sample_rate']; break; case '1': // TTA v3.x // "This is a first stable release of the TTA format. It will be supported by the encoders v3 or higher." $info['tta']['major_version'] = 3; $info['avdataoffset'] += 26; $info['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2)); // getid3_riff::wFormatTagLookup() $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2)); $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2)); $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 4)); $info['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 14, 4)); $info['tta']['crc32_footer'] = substr($ttaheader, 18, 4); $info['tta']['seek_point'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 22, 4)); $info['playtime_seconds'] = $info['tta']['data_length'] / $info['tta']['sample_rate']; break; default: $this->error('This version of getID3() ['.$this->getid3->version().'] only knows how to handle TTA v1 and v2 - it may not work correctly with this file which appears to be TTA v'.$ttaheader[3]); return false; } $info['audio']['encoder'] = 'TTA v'.$info['tta']['major_version']; $info['audio']['bits_per_sample'] = $info['tta']['bits_per_sample']; $info['audio']['sample_rate'] = $info['tta']['sample_rate']; $info['audio']['channels'] = $info['tta']['channels']; $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds']; return true; } }