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- <?php
- if (!defined('GETID3_INCLUDEPATH')) {
- exit;
- }
- class getid3_avr extends getid3_handler
- {
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- public function Analyze() {
- $info = &$this->getid3->info;
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- $info['fileformat'] = 'avr';
- $this->fseek($info['avdataoffset']);
- $AVRheader = $this->fread(128);
- $info['avr']['raw']['magic'] = substr($AVRheader, 0, 4);
- $magic = '2BIT';
- if ($info['avr']['raw']['magic'] != $magic) {
- $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['avr']['raw']['magic']).'"');
- unset($info['fileformat']);
- unset($info['avr']);
- return false;
- }
- $info['avdataoffset'] += 128;
- $info['avr']['sample_name'] = rtrim(substr($AVRheader, 4, 8));
- $info['avr']['raw']['mono'] = getid3_lib::BigEndian2Int(substr($AVRheader, 12, 2));
- $info['avr']['bits_per_sample'] = getid3_lib::BigEndian2Int(substr($AVRheader, 14, 2));
- $info['avr']['raw']['signed'] = getid3_lib::BigEndian2Int(substr($AVRheader, 16, 2));
- $info['avr']['raw']['loop'] = getid3_lib::BigEndian2Int(substr($AVRheader, 18, 2));
- $info['avr']['raw']['midi'] = getid3_lib::BigEndian2Int(substr($AVRheader, 20, 2));
- $info['avr']['raw']['replay_freq'] = getid3_lib::BigEndian2Int(substr($AVRheader, 22, 1));
- $info['avr']['sample_rate'] = getid3_lib::BigEndian2Int(substr($AVRheader, 23, 3));
- $info['avr']['sample_length'] = getid3_lib::BigEndian2Int(substr($AVRheader, 26, 4));
- $info['avr']['loop_start'] = getid3_lib::BigEndian2Int(substr($AVRheader, 30, 4));
- $info['avr']['loop_end'] = getid3_lib::BigEndian2Int(substr($AVRheader, 34, 4));
- $info['avr']['midi_split'] = getid3_lib::BigEndian2Int(substr($AVRheader, 38, 2));
- $info['avr']['sample_compression'] = getid3_lib::BigEndian2Int(substr($AVRheader, 40, 2));
- $info['avr']['reserved'] = getid3_lib::BigEndian2Int(substr($AVRheader, 42, 2));
- $info['avr']['sample_name_extra'] = rtrim(substr($AVRheader, 44, 20));
- $info['avr']['comment'] = rtrim(substr($AVRheader, 64, 64));
- $info['avr']['flags']['stereo'] = (($info['avr']['raw']['mono'] == 0) ? false : true);
- $info['avr']['flags']['signed'] = (($info['avr']['raw']['signed'] == 0) ? false : true);
- $info['avr']['flags']['loop'] = (($info['avr']['raw']['loop'] == 0) ? false : true);
- $info['avr']['midi_notes'] = array();
- if (($info['avr']['raw']['midi'] & 0xFF00) != 0xFF00) {
- $info['avr']['midi_notes'][] = ($info['avr']['raw']['midi'] & 0xFF00) >> 8;
- }
- if (($info['avr']['raw']['midi'] & 0x00FF) != 0x00FF) {
- $info['avr']['midi_notes'][] = ($info['avr']['raw']['midi'] & 0x00FF);
- }
- if (($info['avdataend'] - $info['avdataoffset']) != ($info['avr']['sample_length'] * (($info['avr']['bits_per_sample'] == 8) ? 1 : 2))) {
- $this->warning('Probable truncated file: expecting '.($info['avr']['sample_length'] * (($info['avr']['bits_per_sample'] == 8) ? 1 : 2)).' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']));
- }
- $info['audio']['dataformat'] = 'avr';
- $info['audio']['lossless'] = true;
- $info['audio']['bitrate_mode'] = 'cbr';
- $info['audio']['bits_per_sample'] = $info['avr']['bits_per_sample'];
- $info['audio']['sample_rate'] = $info['avr']['sample_rate'];
- $info['audio']['channels'] = ($info['avr']['flags']['stereo'] ? 2 : 1);
- $info['playtime_seconds'] = ($info['avr']['sample_length'] / $info['audio']['channels']) / $info['avr']['sample_rate'];
- $info['audio']['bitrate'] = ($info['avr']['sample_length'] * (($info['avr']['bits_per_sample'] == 8) ? 8 : 16)) / $info['playtime_seconds'];
- return true;
- }
- }
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