398 lines
19 KiB
PHP
398 lines
19 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio.wavpack.php //
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// module for analyzing WavPack v4.0+ Audio files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_wavpack extends getid3_handler
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{
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public function Analyze() {
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$info = &$this->getid3->info;
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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while (true) {
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$wavpackheader = fread($this->getid3->fp, 32);
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if (ftell($this->getid3->fp) >= $info['avdataend']) {
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break;
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} elseif (feof($this->getid3->fp)) {
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break;
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} elseif (
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isset($info['wavpack']['blockheader']['total_samples']) &&
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isset($info['wavpack']['blockheader']['block_samples']) &&
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($info['wavpack']['blockheader']['total_samples'] > 0) &&
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($info['wavpack']['blockheader']['block_samples'] > 0) &&
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(!isset($info['wavpack']['riff_trailer_size']) || ($info['wavpack']['riff_trailer_size'] <= 0)) &&
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((isset($info['wavpack']['config_flags']['md5_checksum']) && ($info['wavpack']['config_flags']['md5_checksum'] === false)) || !empty($info['md5_data_source']))) {
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break;
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}
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$blockheader_offset = ftell($this->getid3->fp) - 32;
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$blockheader_magic = substr($wavpackheader, 0, 4);
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$blockheader_size = getid3_lib::LittleEndian2Int(substr($wavpackheader, 4, 4));
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$magic = 'wvpk';
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if ($blockheader_magic != $magic) {
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$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$blockheader_offset.', found "'.getid3_lib::PrintHexBytes($blockheader_magic).'"';
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switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
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case 'wavpack':
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case 'wvc':
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break;
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default:
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unset($info['fileformat']);
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unset($info['audio']);
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unset($info['wavpack']);
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break;
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}
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return false;
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}
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if (empty($info['wavpack']['blockheader']['block_samples']) ||
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empty($info['wavpack']['blockheader']['total_samples']) ||
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($info['wavpack']['blockheader']['block_samples'] <= 0) ||
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($info['wavpack']['blockheader']['total_samples'] <= 0)) {
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// Also, it is possible that the first block might not have
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// any samples (block_samples == 0) and in this case you should skip blocks
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// until you find one with samples because the other information (like
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// total_samples) are not guaranteed to be correct until (block_samples > 0)
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// Finally, I have defined a format for files in which the length is not known
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// (for example when raw files are created using pipes). In these cases
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// total_samples will be -1 and you must seek to the final block to determine
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// the total number of samples.
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$info['audio']['dataformat'] = 'wavpack';
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$info['fileformat'] = 'wavpack';
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$info['audio']['lossless'] = true;
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$info['audio']['bitrate_mode'] = 'vbr';
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$info['wavpack']['blockheader']['offset'] = $blockheader_offset;
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$info['wavpack']['blockheader']['magic'] = $blockheader_magic;
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$info['wavpack']['blockheader']['size'] = $blockheader_size;
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if ($info['wavpack']['blockheader']['size'] >= 0x100000) {
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$info['error'][] = 'Expecting WavPack block size less than "0x100000", found "'.$info['wavpack']['blockheader']['size'].'" at offset '.$info['wavpack']['blockheader']['offset'];
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switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
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case 'wavpack':
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case 'wvc':
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break;
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default:
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unset($info['fileformat']);
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unset($info['audio']);
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unset($info['wavpack']);
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break;
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}
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return false;
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}
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$info['wavpack']['blockheader']['minor_version'] = ord($wavpackheader{8});
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$info['wavpack']['blockheader']['major_version'] = ord($wavpackheader{9});
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if (($info['wavpack']['blockheader']['major_version'] != 4) ||
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(($info['wavpack']['blockheader']['minor_version'] < 4) &&
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($info['wavpack']['blockheader']['minor_version'] > 16))) {
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$info['error'][] = 'Expecting WavPack version between "4.2" and "4.16", found version "'.$info['wavpack']['blockheader']['major_version'].'.'.$info['wavpack']['blockheader']['minor_version'].'" at offset '.$info['wavpack']['blockheader']['offset'];
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switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
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case 'wavpack':
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case 'wvc':
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break;
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default:
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unset($info['fileformat']);
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unset($info['audio']);
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unset($info['wavpack']);
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break;
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}
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return false;
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}
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$info['wavpack']['blockheader']['track_number'] = ord($wavpackheader{10}); // unused
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$info['wavpack']['blockheader']['index_number'] = ord($wavpackheader{11}); // unused
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$info['wavpack']['blockheader']['total_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 12, 4));
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$info['wavpack']['blockheader']['block_index'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 16, 4));
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$info['wavpack']['blockheader']['block_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 20, 4));
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$info['wavpack']['blockheader']['flags_raw'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 24, 4));
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$info['wavpack']['blockheader']['crc'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 28, 4));
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$info['wavpack']['blockheader']['flags']['bytes_per_sample'] = 1 + ($info['wavpack']['blockheader']['flags_raw'] & 0x00000003);
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$info['wavpack']['blockheader']['flags']['mono'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000004);
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$info['wavpack']['blockheader']['flags']['hybrid'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000008);
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$info['wavpack']['blockheader']['flags']['joint_stereo'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000010);
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$info['wavpack']['blockheader']['flags']['cross_decorrelation'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000020);
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$info['wavpack']['blockheader']['flags']['hybrid_noiseshape'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000040);
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$info['wavpack']['blockheader']['flags']['ieee_32bit_float'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000080);
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$info['wavpack']['blockheader']['flags']['int_32bit'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000100);
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$info['wavpack']['blockheader']['flags']['hybrid_bitrate_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000200);
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$info['wavpack']['blockheader']['flags']['hybrid_balance_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000400);
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$info['wavpack']['blockheader']['flags']['multichannel_initial'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000800);
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$info['wavpack']['blockheader']['flags']['multichannel_final'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00001000);
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$info['audio']['lossless'] = !$info['wavpack']['blockheader']['flags']['hybrid'];
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}
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while (!feof($this->getid3->fp) && (ftell($this->getid3->fp) < ($blockheader_offset + $blockheader_size + 8))) {
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$metablock = array('offset'=>ftell($this->getid3->fp));
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$metablockheader = fread($this->getid3->fp, 2);
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if (feof($this->getid3->fp)) {
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break;
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}
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$metablock['id'] = ord($metablockheader{0});
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$metablock['function_id'] = ($metablock['id'] & 0x3F);
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$metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']);
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// The 0x20 bit in the id of the meta subblocks (which is defined as
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// ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that
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// if a decoder encounters an id that it does not know about, it uses
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// that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set
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// then the decoder simply ignores the metadata, but if it is zero
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// then the decoder should quit because it means that an understanding
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// of the metadata is required to correctly decode the audio.
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$metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20);
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$metablock['padded_data'] = (bool) ($metablock['id'] & 0x40);
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$metablock['large_block'] = (bool) ($metablock['id'] & 0x80);
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if ($metablock['large_block']) {
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$metablockheader .= fread($this->getid3->fp, 2);
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}
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$metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words
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$metablock['data'] = null;
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if ($metablock['size'] > 0) {
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switch ($metablock['function_id']) {
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case 0x21: // ID_RIFF_HEADER
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case 0x22: // ID_RIFF_TRAILER
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case 0x23: // ID_REPLAY_GAIN
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case 0x24: // ID_CUESHEET
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case 0x25: // ID_CONFIG_BLOCK
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case 0x26: // ID_MD5_CHECKSUM
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$metablock['data'] = fread($this->getid3->fp, $metablock['size']);
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if ($metablock['padded_data']) {
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// padded to the nearest even byte
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$metablock['size']--;
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$metablock['data'] = substr($metablock['data'], 0, -1);
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}
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break;
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case 0x00: // ID_DUMMY
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case 0x01: // ID_ENCODER_INFO
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case 0x02: // ID_DECORR_TERMS
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case 0x03: // ID_DECORR_WEIGHTS
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case 0x04: // ID_DECORR_SAMPLES
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case 0x05: // ID_ENTROPY_VARS
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case 0x06: // ID_HYBRID_PROFILE
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case 0x07: // ID_SHAPING_WEIGHTS
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case 0x08: // ID_FLOAT_INFO
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case 0x09: // ID_INT32_INFO
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case 0x0A: // ID_WV_BITSTREAM
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case 0x0B: // ID_WVC_BITSTREAM
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case 0x0C: // ID_WVX_BITSTREAM
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case 0x0D: // ID_CHANNEL_INFO
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fseek($this->getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET);
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break;
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default:
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$info['warning'][] = 'Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset'];
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fseek($this->getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET);
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break;
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}
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switch ($metablock['function_id']) {
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case 0x21: // ID_RIFF_HEADER
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
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$original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4));
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$getid3_temp = new getID3();
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$getid3_temp->openfile($this->getid3->filename);
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$getid3_riff = new getid3_riff($getid3_temp);
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$getid3_riff->ParseRIFFdata($metablock['data']);
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$metablock['riff'] = $getid3_temp->info['riff'];
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$info['audio']['sample_rate'] = $getid3_temp->info['riff']['raw']['fmt ']['nSamplesPerSec'];
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unset($getid3_riff, $getid3_temp);
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$metablock['riff']['original_filesize'] = $original_wav_filesize;
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$info['wavpack']['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size'];
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$info['playtime_seconds'] = $info['wavpack']['blockheader']['total_samples'] / $info['audio']['sample_rate'];
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// Safe RIFF header in case there's a RIFF footer later
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$metablockRIFFheader = $metablock['data'];
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break;
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case 0x22: // ID_RIFF_TRAILER
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$metablockRIFFfooter = $metablockRIFFheader.$metablock['data'];
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
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$startoffset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2);
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$getid3_temp = new getID3();
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$getid3_temp->openfile($this->getid3->filename);
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$getid3_temp->info['avdataend'] = $info['avdataend'];
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$getid3_temp->info['fileformat'] = 'riff';
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$getid3_riff = new getid3_riff($getid3_temp);
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$metablock['riff'] = $getid3_riff->ParseRIFF($startoffset, $startoffset + $metablock['size']);
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if (!empty($metablock['riff']['INFO'])) {
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getid3_riff::parseComments($metablock['riff']['INFO'], $metablock['comments']);
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$info['tags']['riff'] = $metablock['comments'];
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}
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unset($getid3_temp, $getid3_riff);
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break;
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case 0x23: // ID_REPLAY_GAIN
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$info['warning'][] = 'WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset'];
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break;
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case 0x24: // ID_CUESHEET
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$info['warning'][] = 'WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset'];
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break;
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case 0x25: // ID_CONFIG_BLOCK
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$metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3));
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$metablock['flags']['adobe_mode'] = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats
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$metablock['flags']['fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode
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$metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast
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$metablock['flags']['high_flag'] = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode
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$metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet)
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$metablock['flags']['bitrate_kbps'] = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample
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$metablock['flags']['auto_shaping'] = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping
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$metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified
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$metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified
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$metablock['flags']['copy_time'] = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source
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$metablock['flags']['create_exe'] = (bool) ($metablock['flags_raw'] & 0x000400); // create executable
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$metablock['flags']['create_wvc'] = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file
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$metablock['flags']['optimize_wvc'] = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression
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$metablock['flags']['quality_mode'] = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode
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$metablock['flags']['raw_flag'] = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet)
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$metablock['flags']['calc_noise'] = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode
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$metablock['flags']['lossy_mode'] = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information)
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$metablock['flags']['extra_mode'] = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode
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$metablock['flags']['skip_wvx'] = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints
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$metablock['flags']['md5_checksum'] = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature
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$metablock['flags']['quiet_mode'] = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress %
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$info['wavpack']['config_flags'] = $metablock['flags'];
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$info['audio']['encoder_options'] = '';
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if ($info['wavpack']['blockheader']['flags']['hybrid']) {
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$info['audio']['encoder_options'] .= ' -b???';
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}
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$info['audio']['encoder_options'] .= ($metablock['flags']['adobe_mode'] ? ' -a' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['optimize_wvc'] ? ' -cc' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['create_exe'] ? ' -e' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['fast_flag'] ? ' -f' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['joint_override'] ? ' -j?' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['high_flag'] ? ' -h' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['md5_checksum'] ? ' -m' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['calc_noise'] ? ' -n' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['shape_override'] ? ' -s?' : '');
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$info['audio']['encoder_options'] .= ($metablock['flags']['extra_mode'] ? ' -x?' : '');
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if (!empty($info['audio']['encoder_options'])) {
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$info['audio']['encoder_options'] = trim($info['audio']['encoder_options']);
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} elseif (isset($info['audio']['encoder_options'])) {
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unset($info['audio']['encoder_options']);
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}
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break;
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case 0x26: // ID_MD5_CHECKSUM
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if (strlen($metablock['data']) == 16) {
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$info['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false));
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} else {
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$info['warning'][] = 'Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes';
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}
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break;
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case 0x00: // ID_DUMMY
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case 0x01: // ID_ENCODER_INFO
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case 0x02: // ID_DECORR_TERMS
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case 0x03: // ID_DECORR_WEIGHTS
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case 0x04: // ID_DECORR_SAMPLES
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case 0x05: // ID_ENTROPY_VARS
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case 0x06: // ID_HYBRID_PROFILE
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case 0x07: // ID_SHAPING_WEIGHTS
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case 0x08: // ID_FLOAT_INFO
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case 0x09: // ID_INT32_INFO
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case 0x0A: // ID_WV_BITSTREAM
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case 0x0B: // ID_WVC_BITSTREAM
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case 0x0C: // ID_WVX_BITSTREAM
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case 0x0D: // ID_CHANNEL_INFO
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unset($metablock);
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break;
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}
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}
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if (!empty($metablock)) {
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$info['wavpack']['metablocks'][] = $metablock;
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}
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}
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}
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$info['audio']['encoder'] = 'WavPack v'.$info['wavpack']['blockheader']['major_version'].'.'.str_pad($info['wavpack']['blockheader']['minor_version'], 2, '0', STR_PAD_LEFT);
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$info['audio']['bits_per_sample'] = $info['wavpack']['blockheader']['flags']['bytes_per_sample'] * 8;
|
|
$info['audio']['channels'] = ($info['wavpack']['blockheader']['flags']['mono'] ? 1 : 2);
|
|
|
|
if (!empty($info['playtime_seconds'])) {
|
|
|
|
$info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
|
|
|
|
} else {
|
|
|
|
$info['audio']['dataformat'] = 'wvc';
|
|
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
public function WavPackMetablockNameLookup(&$id) {
|
|
static $WavPackMetablockNameLookup = array(
|
|
0x00 => 'Dummy',
|
|
0x01 => 'Encoder Info',
|
|
0x02 => 'Decorrelation Terms',
|
|
0x03 => 'Decorrelation Weights',
|
|
0x04 => 'Decorrelation Samples',
|
|
0x05 => 'Entropy Variables',
|
|
0x06 => 'Hybrid Profile',
|
|
0x07 => 'Shaping Weights',
|
|
0x08 => 'Float Info',
|
|
0x09 => 'Int32 Info',
|
|
0x0A => 'WV Bitstream',
|
|
0x0B => 'WVC Bitstream',
|
|
0x0C => 'WVX Bitstream',
|
|
0x0D => 'Channel Info',
|
|
0x21 => 'RIFF header',
|
|
0x22 => 'RIFF trailer',
|
|
0x23 => 'Replay Gain',
|
|
0x24 => 'Cuesheet',
|
|
0x25 => 'Config Block',
|
|
0x26 => 'MD5 Checksum',
|
|
);
|
|
return (isset($WavPackMetablockNameLookup[$id]) ? $WavPackMetablockNameLookup[$id] : '');
|
|
}
|
|
|
|
}
|