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1 <?php
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2 // +----------------------------------------------------------------------+
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3 // | PHP version 5 |
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4 // +----------------------------------------------------------------------+
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5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
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6 // +----------------------------------------------------------------------+
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7 // | This source file is subject to version 2 of the GPL license, |
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8 // | that is bundled with this package in the file license.txt and is |
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9 // | available through the world-wide-web at the following url: |
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10 // | http://www.gnu.org/copyleft/gpl.html |
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11 // +----------------------------------------------------------------------+
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12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
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13 // +----------------------------------------------------------------------+
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14 // | Authors: James Heinrich <infoØgetid3*org> |
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15 // | Allan Hansen <ahØartemis*dk> |
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16 // +----------------------------------------------------------------------+
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17 // | module.audio.wavpack.php |
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18 // | module for analyzing WavPack v4.0+ Audio files |
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19 // | dependencies: audio-video.riff |
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20 // +----------------------------------------------------------------------+
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21 //
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22 // $Id: module.audio.wavpack.php,v 1.2 2006/11/02 10:48:02 ah Exp $
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23
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24
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25 class getid3_wavpack extends getid3_handler
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26 {
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27
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28 public function Analyze() {
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29
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30 $getid3 = $this->getid3;
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31
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32 $getid3->include_module('audio-video.riff');
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33
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34 $getid3->info['wavpack'] = array ();
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35 $info_wavpack = &$getid3->info['wavpack'];
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36
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37 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
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38
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39 while (true) {
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40
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41 $wavpack_header = fread($getid3->fp, 32);
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42
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43 if (ftell($getid3->fp) >= $getid3->info['avdataend']) {
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44 break;
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45 } elseif (feof($getid3->fp)) {
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46 break;
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47 } elseif (
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48 (@$info_wavpack_blockheader['total_samples'] > 0) &&
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49 (@$info_wavpack_blockheader['block_samples'] > 0) &&
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50 (!isset($info_wavpack['riff_trailer_size']) || ($info_wavpack['riff_trailer_size'] <= 0)) &&
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51 ((@$info_wavpack['config_flags']['md5_checksum'] === false) || !empty($getid3->info['md5_data_source']))) {
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52 break;
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53 }
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54
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55 $block_header_offset = ftell($getid3->fp) - 32;
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56 $block_header_magic = substr($wavpack_header, 0, 4);
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57 $block_header_size = getid3_lib::LittleEndian2Int(substr($wavpack_header, 4, 4));
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58
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59 if ($block_header_magic != 'wvpk') {
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60 throw new getid3_exception('Expecting "wvpk" at offset '.$block_header_offset.', found "'.$block_header_magic.'"');
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61 }
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62
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63 if ((@$info_wavpack_blockheader['block_samples'] <= 0) || (@$info_wavpack_blockheader['total_samples'] <= 0)) {
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64
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65 // Also, it is possible that the first block might not have
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66 // any samples (block_samples == 0) and in this case you should skip blocks
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67 // until you find one with samples because the other information (like
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68 // total_samples) are not guaranteed to be correct until (block_samples > 0)
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69
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70 // Finally, I have defined a format for files in which the length is not known
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71 // (for example when raw files are created using pipes). In these cases
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72 // total_samples will be -1 and you must seek to the final block to determine
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73 // the total number of samples.
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74
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75
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76 $getid3->info['audio']['dataformat'] = 'wavpack';
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77 $getid3->info['fileformat'] = 'wavpack';
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78 $getid3->info['audio']['lossless'] = true;
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79 $getid3->info['audio']['bitrate_mode'] = 'vbr';
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80
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81 $info_wavpack['blockheader']['offset'] = $block_header_offset;
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82 $info_wavpack['blockheader']['magic'] = $block_header_magic;
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83 $info_wavpack['blockheader']['size'] = $block_header_size;
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84 $info_wavpack_blockheader = &$info_wavpack['blockheader'];
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85
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86 if ($info_wavpack_blockheader['size'] >= 0x100000) {
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87 throw new getid3_exception('Expecting WavPack block size less than "0x100000", found "'.$info_wavpack_blockheader['size'].'" at offset '.$info_wavpack_blockheader['offset']);
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88 }
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89
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90 $info_wavpack_blockheader['minor_version'] = ord($wavpack_header{8});
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91 $info_wavpack_blockheader['major_version'] = ord($wavpack_header{9});
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92
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93 if (($info_wavpack_blockheader['major_version'] != 4) ||
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94 (($info_wavpack_blockheader['minor_version'] < 4) &&
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95 ($info_wavpack_blockheader['minor_version'] > 16))) {
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96 throw new getid3_exception('Expecting WavPack version between "4.2" and "4.16", found version "'.$info_wavpack_blockheader['major_version'].'.'.$info_wavpack_blockheader['minor_version'].'" at offset '.$info_wavpack_blockheader['offset']);
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97 }
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98
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99 $info_wavpack_blockheader['track_number'] = ord($wavpack_header{10}); // unused
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100 $info_wavpack_blockheader['index_number'] = ord($wavpack_header{11}); // unused
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101
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102 getid3_lib::ReadSequence('LittleEndian2Int', $info_wavpack_blockheader, $wavpack_header, 12,
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103 array (
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104 'total_samples' => 4,
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105 'block_index' => 4,
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106 'block_samples' => 4,
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107 'flags_raw' => 4,
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108 'crc' => 4
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109 )
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110 );
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111
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112
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113 $info_wavpack_blockheader['flags']['bytes_per_sample'] = 1 + ($info_wavpack_blockheader['flags_raw'] & 0x00000003);
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114 $info_wavpack_blockheader['flags']['mono'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000004);
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115 $info_wavpack_blockheader['flags']['hybrid'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000008);
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116 $info_wavpack_blockheader['flags']['joint_stereo'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000010);
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117 $info_wavpack_blockheader['flags']['cross_decorrelation'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000020);
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118 $info_wavpack_blockheader['flags']['hybrid_noiseshape'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000040);
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119 $info_wavpack_blockheader['flags']['ieee_32bit_float'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000080);
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120 $info_wavpack_blockheader['flags']['int_32bit'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000100);
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121 $info_wavpack_blockheader['flags']['hybrid_bitrate_noise'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000200);
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122 $info_wavpack_blockheader['flags']['hybrid_balance_noise'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000400);
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123 $info_wavpack_blockheader['flags']['multichannel_initial'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000800);
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124 $info_wavpack_blockheader['flags']['multichannel_final'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00001000);
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125
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126 $getid3->info['audio']['lossless'] = !$info_wavpack_blockheader['flags']['hybrid'];
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127 }
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128
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129
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130 while (!feof($getid3->fp) && (ftell($getid3->fp) < ($block_header_offset + $block_header_size + 8))) {
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131
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132 $metablock = array('offset'=>ftell($getid3->fp));
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133 $metablockheader = fread($getid3->fp, 2);
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134 if (feof($getid3->fp)) {
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135 break;
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136 }
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137 $metablock['id'] = ord($metablockheader{0});
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138 $metablock['function_id'] = ($metablock['id'] & 0x3F);
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139 $metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']);
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140
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141 // The 0x20 bit in the id of the meta subblocks (which is defined as
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142 // ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that
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143 // if a decoder encounters an id that it does not know about, it uses
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144 // that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set
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145 // then the decoder simply ignores the metadata, but if it is zero
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146 // then the decoder should quit because it means that an understanding
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147 // of the metadata is required to correctly decode the audio.
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148
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149 $metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20);
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150 $metablock['padded_data'] = (bool) ($metablock['id'] & 0x40);
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151 $metablock['large_block'] = (bool) ($metablock['id'] & 0x80);
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152 if ($metablock['large_block']) {
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153 $metablockheader .= fread($getid3->fp, 2);
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154 }
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155 $metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words
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156 $metablock['data'] = null;
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157
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158 if ($metablock['size'] > 0) {
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159
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160 switch ($metablock['function_id']) {
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161
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162 case 0x21: // ID_RIFF_HEADER
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163 case 0x22: // ID_RIFF_TRAILER
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164 case 0x23: // ID_REPLAY_GAIN
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165 case 0x24: // ID_CUESHEET
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166 case 0x25: // ID_CONFIG_BLOCK
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167 case 0x26: // ID_MD5_CHECKSUM
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168 $metablock['data'] = fread($getid3->fp, $metablock['size']);
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169
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170 if ($metablock['padded_data']) {
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171 // padded to the nearest even byte
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172 $metablock['size']--;
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173 $metablock['data'] = substr($metablock['data'], 0, -1);
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174 }
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175 break;
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176
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177
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178 case 0x00: // ID_DUMMY
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179 case 0x01: // ID_ENCODER_INFO
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180 case 0x02: // ID_DECORR_TERMS
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181 case 0x03: // ID_DECORR_WEIGHTS
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182 case 0x04: // ID_DECORR_SAMPLES
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183 case 0x05: // ID_ENTROPY_VARS
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184 case 0x06: // ID_HYBRID_PROFILE
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185 case 0x07: // ID_SHAPING_WEIGHTS
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186 case 0x08: // ID_FLOAT_INFO
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187 case 0x09: // ID_INT32_INFO
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188 case 0x0A: // ID_WV_BITSTREAM
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189 case 0x0B: // ID_WVC_BITSTREAM
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190 case 0x0C: // ID_WVX_BITSTREAM
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191 case 0x0D: // ID_CHANNEL_INFO
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192 fseek($getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET);
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193 break;
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194
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195
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196 default:
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197 $getid3->warning('Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset']);
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198 fseek($getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET);
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199 break;
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200 }
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201
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202
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203 switch ($metablock['function_id']) {
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204
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205 case 0x21: // ID_RIFF_HEADER
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206
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207 $original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4));
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208
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209 // Clone getid3
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210 $clone = clone $getid3;
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211
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212 // Analyze clone by string
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213 $riff = new getid3_riff($clone);
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214 $riff->AnalyzeString($metablock['data']);
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215
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216 // Import from clone and destroy
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217 $metablock['riff'] = $clone->info['riff'];
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218 $getid3->warnings($clone->warnings());
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219 unset($clone);
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220
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221 // Save RIFF header - we may need it later for RIFF footer parsing
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222 $this->riff_header = $metablock['data'];
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223
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224 $metablock['riff']['original_filesize'] = $original_wav_filesize;
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225 $info_wavpack['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size'];
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226
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227 $getid3->info['audio']['sample_rate'] = $metablock['riff']['raw']['fmt ']['nSamplesPerSec'];
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228 $getid3->info['playtime_seconds'] = $info_wavpack_blockheader['total_samples'] / $getid3->info['audio']['sample_rate'];
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229
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230 // Safe RIFF header in case there's a RIFF footer later
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231 $metablock_riff_header = $metablock['data'];
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232 break;
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233
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234
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235 case 0x22: // ID_RIFF_TRAILER
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236
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237 $metablock_riff_footer = $metablock_riff_header.$metablock['data'];
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238
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239 $start_offset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2);
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240
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241 $ftell_old = ftell($getid3->fp);
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242
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243 // Clone getid3
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244 $clone = clone $getid3;
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245
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246 // Call public method that really should be private
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247 $riff = new getid3_riff($clone);
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248 $metablock['riff'] = $riff->ParseRIFF($start_offset, $start_offset + $metablock['size']);
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249 unset($clone);
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250
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251 fseek($getid3->fp, $ftell_old, SEEK_SET);
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252
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253 if (!empty($metablock['riff']['INFO'])) {
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254 getid3_riff::RIFFCommentsParse($metablock['riff']['INFO'], $metablock['comments']);
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255 $getid3->info['tags']['riff'] = $metablock['comments'];
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256 }
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257 break;
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258
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259
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260 case 0x23: // ID_REPLAY_GAIN
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261 $getid3->warning('WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']);
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rlm@3
|
262 break;
|
|
rlm@3
|
263
|
|
rlm@3
|
264
|
|
rlm@3
|
265 case 0x24: // ID_CUESHEET
|
|
rlm@3
|
266 $getid3->warning('WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']);
|
|
rlm@3
|
267 break;
|
|
rlm@3
|
268
|
|
rlm@3
|
269
|
|
rlm@3
|
270 case 0x25: // ID_CONFIG_BLOCK
|
|
rlm@3
|
271 $metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3));
|
|
rlm@3
|
272
|
|
rlm@3
|
273 $metablock['flags']['adobe_mode'] = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats
|
|
rlm@3
|
274 $metablock['flags']['fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode
|
|
rlm@3
|
275 $metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast
|
|
rlm@3
|
276 $metablock['flags']['high_flag'] = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode
|
|
rlm@3
|
277 $metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet)
|
|
rlm@3
|
278 $metablock['flags']['bitrate_kbps'] = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample
|
|
rlm@3
|
279 $metablock['flags']['auto_shaping'] = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping
|
|
rlm@3
|
280 $metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified
|
|
rlm@3
|
281 $metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified
|
|
rlm@3
|
282 $metablock['flags']['copy_time'] = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source
|
|
rlm@3
|
283 $metablock['flags']['create_exe'] = (bool) ($metablock['flags_raw'] & 0x000400); // create executable
|
|
rlm@3
|
284 $metablock['flags']['create_wvc'] = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file
|
|
rlm@3
|
285 $metablock['flags']['optimize_wvc'] = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression
|
|
rlm@3
|
286 $metablock['flags']['quality_mode'] = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode
|
|
rlm@3
|
287 $metablock['flags']['raw_flag'] = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet)
|
|
rlm@3
|
288 $metablock['flags']['calc_noise'] = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode
|
|
rlm@3
|
289 $metablock['flags']['lossy_mode'] = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information)
|
|
rlm@3
|
290 $metablock['flags']['extra_mode'] = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode
|
|
rlm@3
|
291 $metablock['flags']['skip_wvx'] = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints
|
|
rlm@3
|
292 $metablock['flags']['md5_checksum'] = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature
|
|
rlm@3
|
293 $metablock['flags']['quiet_mode'] = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress %
|
|
rlm@3
|
294
|
|
rlm@3
|
295 $info_wavpack['config_flags'] = $metablock['flags'];
|
|
rlm@3
|
296
|
|
rlm@3
|
297 $getid3->info['audio']['encoder_options'] = trim(
|
|
rlm@3
|
298 ($info_wavpack_blockheader['flags']['hybrid'] ? ' -b???' : '') .
|
|
rlm@3
|
299 ($metablock['flags']['adobe_mode'] ? ' -a' : '') .
|
|
rlm@3
|
300 ($metablock['flags']['optimize_wvc'] ? ' -cc' : '') .
|
|
rlm@3
|
301 ($metablock['flags']['create_exe'] ? ' -e' : '') .
|
|
rlm@3
|
302 ($metablock['flags']['fast_flag'] ? ' -f' : '') .
|
|
rlm@3
|
303 ($metablock['flags']['joint_override'] ? ' -j?' : '') .
|
|
rlm@3
|
304 ($metablock['flags']['high_flag'] ? ' -h' : '') .
|
|
rlm@3
|
305 ($metablock['flags']['md5_checksum'] ? ' -m' : '') .
|
|
rlm@3
|
306 ($metablock['flags']['calc_noise'] ? ' -n' : '') .
|
|
rlm@3
|
307 ($metablock['flags']['shape_override'] ? ' -s?' : '') .
|
|
rlm@3
|
308 ($metablock['flags']['extra_mode'] ? ' -x?' : '')
|
|
rlm@3
|
309 );
|
|
rlm@3
|
310 if (!$getid3->info['audio']['encoder_options']) {
|
|
rlm@3
|
311 unset($getid3->info['audio']['encoder_options']);
|
|
rlm@3
|
312 }
|
|
rlm@3
|
313 break;
|
|
rlm@3
|
314
|
|
rlm@3
|
315
|
|
rlm@3
|
316 case 0x26: // ID_MD5_CHECKSUM
|
|
rlm@3
|
317 if (strlen($metablock['data']) == 16) {
|
|
rlm@3
|
318 $getid3->info['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false));
|
|
rlm@3
|
319 } else {
|
|
rlm@3
|
320 $getid3->warning('Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes');
|
|
rlm@3
|
321 }
|
|
rlm@3
|
322 break;
|
|
rlm@3
|
323
|
|
rlm@3
|
324
|
|
rlm@3
|
325 case 0x00: // ID_DUMMY
|
|
rlm@3
|
326 case 0x01: // ID_ENCODER_INFO
|
|
rlm@3
|
327 case 0x02: // ID_DECORR_TERMS
|
|
rlm@3
|
328 case 0x03: // ID_DECORR_WEIGHTS
|
|
rlm@3
|
329 case 0x04: // ID_DECORR_SAMPLES
|
|
rlm@3
|
330 case 0x05: // ID_ENTROPY_VARS
|
|
rlm@3
|
331 case 0x06: // ID_HYBRID_PROFILE
|
|
rlm@3
|
332 case 0x07: // ID_SHAPING_WEIGHTS
|
|
rlm@3
|
333 case 0x08: // ID_FLOAT_INFO
|
|
rlm@3
|
334 case 0x09: // ID_INT32_INFO
|
|
rlm@3
|
335 case 0x0A: // ID_WV_BITSTREAM
|
|
rlm@3
|
336 case 0x0B: // ID_WVC_BITSTREAM
|
|
rlm@3
|
337 case 0x0C: // ID_WVX_BITSTREAM
|
|
rlm@3
|
338 case 0x0D: // ID_CHANNEL_INFO
|
|
rlm@3
|
339 unset($metablock);
|
|
rlm@3
|
340 break;
|
|
rlm@3
|
341 }
|
|
rlm@3
|
342
|
|
rlm@3
|
343 }
|
|
rlm@3
|
344
|
|
rlm@3
|
345 if (!empty($metablock)) {
|
|
rlm@3
|
346 $info_wavpack['metablocks'][] = $metablock;
|
|
rlm@3
|
347 }
|
|
rlm@3
|
348
|
|
rlm@3
|
349 }
|
|
rlm@3
|
350
|
|
rlm@3
|
351 }
|
|
rlm@3
|
352
|
|
rlm@3
|
353 $getid3->info['audio']['encoder'] = 'WavPack v'.$info_wavpack_blockheader['major_version'].'.'.str_pad($info_wavpack_blockheader['minor_version'], 2, '0', STR_PAD_LEFT);
|
|
rlm@3
|
354 $getid3->info['audio']['bits_per_sample'] = $info_wavpack_blockheader['flags']['bytes_per_sample'] * 8;
|
|
rlm@3
|
355 $getid3->info['audio']['channels'] = ($info_wavpack_blockheader['flags']['mono'] ? 1 : 2);
|
|
rlm@3
|
356
|
|
rlm@3
|
357 if (@$getid3->info['playtime_seconds']) {
|
|
rlm@3
|
358 $getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['playtime_seconds'];
|
|
rlm@3
|
359 } else {
|
|
rlm@3
|
360 $getid3->info['audio']['dataformat'] = 'wvc';
|
|
rlm@3
|
361 }
|
|
rlm@3
|
362
|
|
rlm@3
|
363 return true;
|
|
rlm@3
|
364 }
|
|
rlm@3
|
365
|
|
rlm@3
|
366
|
|
rlm@3
|
367
|
|
rlm@3
|
368 public static function WavPackMetablockNameLookup($id) {
|
|
rlm@3
|
369
|
|
rlm@3
|
370 static $lookup = array(
|
|
rlm@3
|
371 0x00 => 'Dummy',
|
|
rlm@3
|
372 0x01 => 'Encoder Info',
|
|
rlm@3
|
373 0x02 => 'Decorrelation Terms',
|
|
rlm@3
|
374 0x03 => 'Decorrelation Weights',
|
|
rlm@3
|
375 0x04 => 'Decorrelation Samples',
|
|
rlm@3
|
376 0x05 => 'Entropy Variables',
|
|
rlm@3
|
377 0x06 => 'Hybrid Profile',
|
|
rlm@3
|
378 0x07 => 'Shaping Weights',
|
|
rlm@3
|
379 0x08 => 'Float Info',
|
|
rlm@3
|
380 0x09 => 'Int32 Info',
|
|
rlm@3
|
381 0x0A => 'WV Bitstream',
|
|
rlm@3
|
382 0x0B => 'WVC Bitstream',
|
|
rlm@3
|
383 0x0C => 'WVX Bitstream',
|
|
rlm@3
|
384 0x0D => 'Channel Info',
|
|
rlm@3
|
385 0x21 => 'RIFF header',
|
|
rlm@3
|
386 0x22 => 'RIFF trailer',
|
|
rlm@3
|
387 0x23 => 'Replay Gain',
|
|
rlm@3
|
388 0x24 => 'Cuesheet',
|
|
rlm@3
|
389 0x25 => 'Config Block',
|
|
rlm@3
|
390 0x26 => 'MD5 Checksum',
|
|
rlm@3
|
391 );
|
|
rlm@3
|
392
|
|
rlm@3
|
393 return (@$lookup[$id]);
|
|
rlm@3
|
394 }
|
|
rlm@3
|
395
|
|
rlm@3
|
396 }
|
|
rlm@3
|
397
|
|
rlm@3
|
398
|
|
rlm@3
|
399 ?> |
