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