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1 <?php |
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2 ///////////////////////////////////////////////////////////////// |
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3 /// getID3() by James Heinrich <info@getid3.org> // |
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4 // available at http://getid3.sourceforge.net // |
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5 // or http://www.getid3.org // |
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6 ///////////////////////////////////////////////////////////////// |
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7 // See readme.txt for more details // |
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8 ///////////////////////////////////////////////////////////////// |
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9 // // |
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10 // module.audio.ogg.php // |
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11 // module for analyzing Ogg Vorbis, OggFLAC and Speex files // |
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12 // dependencies: module.audio.flac.php // |
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13 // /// |
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14 ///////////////////////////////////////////////////////////////// |
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15 |
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16 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true); |
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17 |
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18 class getid3_ogg extends getid3_handler |
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19 { |
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20 // http://xiph.org/vorbis/doc/Vorbis_I_spec.html |
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21 public function Analyze() { |
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22 $info = &$this->getid3->info; |
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23 |
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24 $info['fileformat'] = 'ogg'; |
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25 |
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26 // Warn about illegal tags - only vorbiscomments are allowed |
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27 if (isset($info['id3v2'])) { |
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28 $info['warning'][] = 'Illegal ID3v2 tag present.'; |
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29 } |
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30 if (isset($info['id3v1'])) { |
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31 $info['warning'][] = 'Illegal ID3v1 tag present.'; |
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32 } |
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33 if (isset($info['ape'])) { |
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34 $info['warning'][] = 'Illegal APE tag present.'; |
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35 } |
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36 |
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37 |
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38 // Page 1 - Stream Header |
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39 |
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40 $this->fseek($info['avdataoffset']); |
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41 |
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42 $oggpageinfo = $this->ParseOggPageHeader(); |
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43 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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44 |
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45 if ($this->ftell() >= $this->getid3->fread_buffer_size()) { |
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46 $info['error'][] = 'Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)'; |
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47 unset($info['fileformat']); |
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48 unset($info['ogg']); |
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49 return false; |
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50 } |
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51 |
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52 $filedata = $this->fread($oggpageinfo['page_length']); |
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53 $filedataoffset = 0; |
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54 |
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55 if (substr($filedata, 0, 4) == 'fLaC') { |
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56 |
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57 $info['audio']['dataformat'] = 'flac'; |
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58 $info['audio']['bitrate_mode'] = 'vbr'; |
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59 $info['audio']['lossless'] = true; |
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60 |
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61 } elseif (substr($filedata, 1, 6) == 'vorbis') { |
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62 |
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63 $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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64 |
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65 } elseif (substr($filedata, 0, 8) == 'Speex ') { |
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66 |
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67 // http://www.speex.org/manual/node10.html |
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68 |
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69 $info['audio']['dataformat'] = 'speex'; |
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70 $info['mime_type'] = 'audio/speex'; |
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71 $info['audio']['bitrate_mode'] = 'abr'; |
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72 $info['audio']['lossless'] = false; |
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73 |
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74 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' |
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75 $filedataoffset += 8; |
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76 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); |
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77 $filedataoffset += 20; |
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78 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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79 $filedataoffset += 4; |
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80 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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81 $filedataoffset += 4; |
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82 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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83 $filedataoffset += 4; |
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84 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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85 $filedataoffset += 4; |
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86 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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87 $filedataoffset += 4; |
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88 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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89 $filedataoffset += 4; |
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90 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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91 $filedataoffset += 4; |
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92 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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93 $filedataoffset += 4; |
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94 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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95 $filedataoffset += 4; |
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96 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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97 $filedataoffset += 4; |
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98 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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99 $filedataoffset += 4; |
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100 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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101 $filedataoffset += 4; |
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102 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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103 $filedataoffset += 4; |
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104 |
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105 $info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); |
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106 $info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; |
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107 $info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; |
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108 $info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; |
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109 $info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); |
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110 |
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111 $info['audio']['sample_rate'] = $info['speex']['sample_rate']; |
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112 $info['audio']['channels'] = $info['speex']['channels']; |
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113 if ($info['speex']['vbr']) { |
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114 $info['audio']['bitrate_mode'] = 'vbr'; |
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115 } |
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116 |
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117 |
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118 } elseif (substr($filedata, 0, 8) == "fishead\x00") { |
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119 |
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120 // Ogg Skeleton version 3.0 Format Specification |
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121 // http://xiph.org/ogg/doc/skeleton.html |
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122 $filedataoffset += 8; |
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123 $info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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124 $filedataoffset += 2; |
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125 $info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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126 $filedataoffset += 2; |
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127 $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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128 $filedataoffset += 8; |
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129 $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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130 $filedataoffset += 8; |
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131 $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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132 $filedataoffset += 8; |
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133 $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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134 $filedataoffset += 8; |
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135 $info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20)); |
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136 $filedataoffset += 20; |
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137 |
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138 $info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor']; |
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139 $info['ogg']['skeleton']['fishead']['presentationtime'] = $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator']; |
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140 $info['ogg']['skeleton']['fishead']['basetime'] = $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']; |
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141 $info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc']; |
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142 |
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143 |
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144 $counter = 0; |
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145 do { |
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146 $oggpageinfo = $this->ParseOggPageHeader(); |
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147 $info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo; |
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148 $filedata = $this->fread($oggpageinfo['page_length']); |
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149 $this->fseek($oggpageinfo['page_end_offset']); |
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150 |
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151 if (substr($filedata, 0, 8) == "fisbone\x00") { |
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152 |
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153 $filedataoffset = 8; |
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154 $info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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155 $filedataoffset += 4; |
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156 $info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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157 $filedataoffset += 4; |
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158 $info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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159 $filedataoffset += 4; |
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160 $info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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161 $filedataoffset += 8; |
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162 $info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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163 $filedataoffset += 8; |
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164 $info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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165 $filedataoffset += 8; |
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166 $info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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167 $filedataoffset += 4; |
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168 $info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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169 $filedataoffset += 1; |
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170 $info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3); |
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171 $filedataoffset += 3; |
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172 |
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173 } elseif (substr($filedata, 1, 6) == 'theora') { |
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174 |
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175 $info['video']['dataformat'] = 'theora'; |
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176 $info['error'][] = 'Ogg Theora not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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177 //break; |
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178 |
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179 } elseif (substr($filedata, 1, 6) == 'vorbis') { |
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180 |
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181 $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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182 |
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183 } else { |
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184 $info['error'][] = 'unexpected'; |
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185 //break; |
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186 } |
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187 //} while ($oggpageinfo['page_seqno'] == 0); |
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188 } while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00")); |
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189 |
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190 $this->fseek($oggpageinfo['page_start_offset']); |
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191 |
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192 $info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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193 //return false; |
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194 |
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195 } else { |
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196 |
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197 $info['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found "'.substr($filedata, 0, 8).'"'; |
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198 unset($info['ogg']); |
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199 unset($info['mime_type']); |
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200 return false; |
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201 |
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202 } |
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203 |
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204 // Page 2 - Comment Header |
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205 $oggpageinfo = $this->ParseOggPageHeader(); |
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206 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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207 |
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208 switch ($info['audio']['dataformat']) { |
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209 case 'vorbis': |
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210 $filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
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211 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); |
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212 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' |
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213 |
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214 $this->ParseVorbisComments(); |
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215 break; |
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216 |
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217 case 'flac': |
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218 $flac = new getid3_flac($this->getid3); |
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219 if (!$flac->parseMETAdata()) { |
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220 $info['error'][] = 'Failed to parse FLAC headers'; |
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221 return false; |
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222 } |
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223 unset($flac); |
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224 break; |
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225 |
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226 case 'speex': |
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227 $this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); |
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228 $this->ParseVorbisComments(); |
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229 break; |
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230 } |
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231 |
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232 |
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233 // Last Page - Number of Samples |
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234 if (!getid3_lib::intValueSupported($info['avdataend'])) { |
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235 |
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236 $info['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)'; |
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237 |
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238 } else { |
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239 |
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240 $this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0)); |
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241 $LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size())); |
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242 if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { |
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243 $this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO'))); |
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244 $info['avdataend'] = $this->ftell(); |
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245 $info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader(); |
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246 $info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position']; |
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247 if ($info['ogg']['samples'] == 0) { |
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248 $info['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; |
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249 return false; |
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250 } |
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251 if (!empty($info['audio']['sample_rate'])) { |
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252 $info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / ($info['ogg']['samples'] / $info['audio']['sample_rate']); |
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253 } |
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254 } |
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255 |
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256 } |
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257 |
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258 if (!empty($info['ogg']['bitrate_average'])) { |
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259 $info['audio']['bitrate'] = $info['ogg']['bitrate_average']; |
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260 } elseif (!empty($info['ogg']['bitrate_nominal'])) { |
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261 $info['audio']['bitrate'] = $info['ogg']['bitrate_nominal']; |
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262 } elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) { |
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263 $info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2; |
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264 } |
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265 if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) { |
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266 if ($info['audio']['bitrate'] == 0) { |
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267 $info['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; |
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268 return false; |
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269 } |
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270 $info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']); |
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271 } |
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272 |
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273 if (isset($info['ogg']['vendor'])) { |
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274 $info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']); |
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275 |
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276 // Vorbis only |
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277 if ($info['audio']['dataformat'] == 'vorbis') { |
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278 |
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279 // Vorbis 1.0 starts with Xiph.Org |
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280 if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) { |
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281 |
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282 if ($info['audio']['bitrate_mode'] == 'abr') { |
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283 |
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284 // Set -b 128 on abr files |
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285 $info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000); |
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286 |
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287 } elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) { |
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288 // Set -q N on vbr files |
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289 $info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']); |
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290 |
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291 } |
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292 } |
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293 |
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294 if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) { |
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295 $info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps'; |
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296 } |
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297 } |
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298 } |
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299 |
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300 return true; |
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301 } |
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302 |
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303 public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) { |
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304 $info = &$this->getid3->info; |
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305 $info['audio']['dataformat'] = 'vorbis'; |
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306 $info['audio']['lossless'] = false; |
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307 |
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308 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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309 $filedataoffset += 1; |
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310 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' |
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311 $filedataoffset += 6; |
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312 $info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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313 $filedataoffset += 4; |
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314 $info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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315 $filedataoffset += 1; |
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316 $info['audio']['channels'] = $info['ogg']['numberofchannels']; |
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317 $info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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318 $filedataoffset += 4; |
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319 if ($info['ogg']['samplerate'] == 0) { |
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320 $info['error'][] = 'Corrupt Ogg file: sample rate == zero'; |
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321 return false; |
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322 } |
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323 $info['audio']['sample_rate'] = $info['ogg']['samplerate']; |
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324 $info['ogg']['samples'] = 0; // filled in later |
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325 $info['ogg']['bitrate_average'] = 0; // filled in later |
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326 $info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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327 $filedataoffset += 4; |
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328 $info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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329 $filedataoffset += 4; |
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330 $info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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331 $filedataoffset += 4; |
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332 $info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); |
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333 $info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); |
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334 $info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet |
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335 |
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336 $info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr |
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337 if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) { |
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338 unset($info['ogg']['bitrate_max']); |
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339 $info['audio']['bitrate_mode'] = 'abr'; |
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340 } |
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341 if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { |
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342 unset($info['ogg']['bitrate_nominal']); |
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343 } |
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344 if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) { |
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345 unset($info['ogg']['bitrate_min']); |
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346 $info['audio']['bitrate_mode'] = 'abr'; |
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347 } |
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348 return true; |
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349 } |
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350 |
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351 public function ParseOggPageHeader() { |
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352 // http://xiph.org/ogg/vorbis/doc/framing.html |
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353 $oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file |
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354 |
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355 $filedata = $this->fread($this->getid3->fread_buffer_size()); |
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356 $filedataoffset = 0; |
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357 while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { |
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358 if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) { |
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359 // should be found before here |
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360 return false; |
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361 } |
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362 if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { |
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363 if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) { |
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364 // get some more data, unless eof, in which case fail |
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365 return false; |
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366 } |
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367 } |
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368 } |
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369 $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' |
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370 |
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371 $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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372 $filedataoffset += 1; |
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373 $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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374 $filedataoffset += 1; |
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375 $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet |
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376 $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) |
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377 $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos) |
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378 |
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379 $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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380 $filedataoffset += 8; |
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381 $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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382 $filedataoffset += 4; |
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383 $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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384 $filedataoffset += 4; |
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385 $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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386 $filedataoffset += 4; |
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387 $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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388 $filedataoffset += 1; |
|
389 $oggheader['page_length'] = 0; |
|
390 for ($i = 0; $i < $oggheader['page_segments']; $i++) { |
|
391 $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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392 $filedataoffset += 1; |
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393 $oggheader['page_length'] += $oggheader['segment_table'][$i]; |
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394 } |
|
395 $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset; |
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396 $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length']; |
|
397 $this->fseek($oggheader['header_end_offset']); |
|
398 |
|
399 return $oggheader; |
|
400 } |
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401 |
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402 // http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005 |
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403 public function ParseVorbisComments() { |
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404 $info = &$this->getid3->info; |
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405 |
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406 $OriginalOffset = $this->ftell(); |
|
407 $commentdataoffset = 0; |
|
408 $VorbisCommentPage = 1; |
|
409 |
|
410 switch ($info['audio']['dataformat']) { |
|
411 case 'vorbis': |
|
412 case 'speex': |
|
413 $CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block |
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414 $this->fseek($CommentStartOffset); |
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415 $commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; |
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416 $commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); |
|
417 |
|
418 if ($info['audio']['dataformat'] == 'vorbis') { |
|
419 $commentdataoffset += (strlen('vorbis') + 1); |
|
420 } |
|
421 break; |
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422 |
|
423 case 'flac': |
|
424 $CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4; |
|
425 $this->fseek($CommentStartOffset); |
|
426 $commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']); |
|
427 break; |
|
428 |
|
429 default: |
|
430 return false; |
|
431 } |
|
432 |
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433 $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
434 $commentdataoffset += 4; |
|
435 |
|
436 $info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); |
|
437 $commentdataoffset += $VendorSize; |
|
438 |
|
439 $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
440 $commentdataoffset += 4; |
|
441 $info['avdataoffset'] = $CommentStartOffset + $commentdataoffset; |
|
442 |
|
443 $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); |
|
444 $ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw']; |
|
445 for ($i = 0; $i < $CommentsCount; $i++) { |
|
446 |
|
447 $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; |
|
448 |
|
449 if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) { |
|
450 if ($oggpageinfo = $this->ParseOggPageHeader()) { |
|
451 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
|
452 |
|
453 $VorbisCommentPage++; |
|
454 |
|
455 // First, save what we haven't read yet |
|
456 $AsYetUnusedData = substr($commentdata, $commentdataoffset); |
|
457 |
|
458 // Then take that data off the end |
|
459 $commentdata = substr($commentdata, 0, $commentdataoffset); |
|
460 |
|
461 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
462 $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
463 $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
464 |
|
465 // Finally, stick the unused data back on the end |
|
466 $commentdata .= $AsYetUnusedData; |
|
467 |
|
468 //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
|
469 $commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1)); |
|
470 } |
|
471 |
|
472 } |
|
473 $ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
474 |
|
475 // replace avdataoffset with position just after the last vorbiscomment |
|
476 $info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4; |
|
477 |
|
478 $commentdataoffset += 4; |
|
479 while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) { |
|
480 if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) { |
|
481 $info['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments'; |
|
482 break 2; |
|
483 } |
|
484 |
|
485 $VorbisCommentPage++; |
|
486 |
|
487 $oggpageinfo = $this->ParseOggPageHeader(); |
|
488 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
|
489 |
|
490 // First, save what we haven't read yet |
|
491 $AsYetUnusedData = substr($commentdata, $commentdataoffset); |
|
492 |
|
493 // Then take that data off the end |
|
494 $commentdata = substr($commentdata, 0, $commentdataoffset); |
|
495 |
|
496 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
497 $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
498 $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
499 |
|
500 // Finally, stick the unused data back on the end |
|
501 $commentdata .= $AsYetUnusedData; |
|
502 |
|
503 //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
|
504 if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) { |
|
505 $info['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
|
506 break; |
|
507 } |
|
508 $readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1); |
|
509 if ($readlength <= 0) { |
|
510 $info['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
|
511 break; |
|
512 } |
|
513 $commentdata .= $this->fread($readlength); |
|
514 |
|
515 //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; |
|
516 } |
|
517 $ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset; |
|
518 $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']); |
|
519 $commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size']; |
|
520 |
|
521 if (!$commentstring) { |
|
522 |
|
523 // no comment? |
|
524 $info['warning'][] = 'Blank Ogg comment ['.$i.']'; |
|
525 |
|
526 } elseif (strstr($commentstring, '=')) { |
|
527 |
|
528 $commentexploded = explode('=', $commentstring, 2); |
|
529 $ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]); |
|
530 $ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : ''); |
|
531 |
|
532 if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') { |
|
533 |
|
534 // http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE |
|
535 // The unencoded format is that of the FLAC picture block. The fields are stored in big endian order as in FLAC, picture data is stored according to the relevant standard. |
|
536 // http://flac.sourceforge.net/format.html#metadata_block_picture |
|
537 $flac = new getid3_flac($this->getid3); |
|
538 $flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value'])); |
|
539 $flac->parsePICTURE(); |
|
540 $info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0]; |
|
541 unset($flac); |
|
542 |
|
543 } elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') { |
|
544 |
|
545 $data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']); |
|
546 $this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure'); |
|
547 /** @todo use 'coverartmime' where available */ |
|
548 $imageinfo = getid3_lib::GetDataImageSize($data); |
|
549 if ($imageinfo === false || !isset($imageinfo['mime'])) { |
|
550 $this->warning('COVERART vorbiscomment tag contains invalid image'); |
|
551 continue; |
|
552 } |
|
553 |
|
554 $ogg = new self($this->getid3); |
|
555 $ogg->setStringMode($data); |
|
556 $info['ogg']['comments']['picture'][] = array( |
|
557 'image_mime' => $imageinfo['mime'], |
|
558 'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']), |
|
559 ); |
|
560 unset($ogg); |
|
561 |
|
562 } else { |
|
563 |
|
564 $info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value']; |
|
565 |
|
566 } |
|
567 |
|
568 } else { |
|
569 |
|
570 $info['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; |
|
571 |
|
572 } |
|
573 unset($ThisFileInfo_ogg_comments_raw[$i]); |
|
574 } |
|
575 unset($ThisFileInfo_ogg_comments_raw); |
|
576 |
|
577 |
|
578 // Replay Gain Adjustment |
|
579 // http://privatewww.essex.ac.uk/~djmrob/replaygain/ |
|
580 if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) { |
|
581 foreach ($info['ogg']['comments'] as $index => $commentvalue) { |
|
582 switch ($index) { |
|
583 case 'rg_audiophile': |
|
584 case 'replaygain_album_gain': |
|
585 $info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0]; |
|
586 unset($info['ogg']['comments'][$index]); |
|
587 break; |
|
588 |
|
589 case 'rg_radio': |
|
590 case 'replaygain_track_gain': |
|
591 $info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0]; |
|
592 unset($info['ogg']['comments'][$index]); |
|
593 break; |
|
594 |
|
595 case 'replaygain_album_peak': |
|
596 $info['replay_gain']['album']['peak'] = (double) $commentvalue[0]; |
|
597 unset($info['ogg']['comments'][$index]); |
|
598 break; |
|
599 |
|
600 case 'rg_peak': |
|
601 case 'replaygain_track_peak': |
|
602 $info['replay_gain']['track']['peak'] = (double) $commentvalue[0]; |
|
603 unset($info['ogg']['comments'][$index]); |
|
604 break; |
|
605 |
|
606 case 'replaygain_reference_loudness': |
|
607 $info['replay_gain']['reference_volume'] = (double) $commentvalue[0]; |
|
608 unset($info['ogg']['comments'][$index]); |
|
609 break; |
|
610 |
|
611 default: |
|
612 // do nothing |
|
613 break; |
|
614 } |
|
615 } |
|
616 } |
|
617 |
|
618 $this->fseek($OriginalOffset); |
|
619 |
|
620 return true; |
|
621 } |
|
622 |
|
623 public static function SpeexBandModeLookup($mode) { |
|
624 static $SpeexBandModeLookup = array(); |
|
625 if (empty($SpeexBandModeLookup)) { |
|
626 $SpeexBandModeLookup[0] = 'narrow'; |
|
627 $SpeexBandModeLookup[1] = 'wide'; |
|
628 $SpeexBandModeLookup[2] = 'ultra-wide'; |
|
629 } |
|
630 return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); |
|
631 } |
|
632 |
|
633 |
|
634 public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) { |
|
635 for ($i = 0; $i < $SegmentNumber; $i++) { |
|
636 $segmentlength = 0; |
|
637 foreach ($OggInfoArray['segment_table'] as $key => $value) { |
|
638 $segmentlength += $value; |
|
639 if ($value < 255) { |
|
640 break; |
|
641 } |
|
642 } |
|
643 } |
|
644 return $segmentlength; |
|
645 } |
|
646 |
|
647 |
|
648 public static function get_quality_from_nominal_bitrate($nominal_bitrate) { |
|
649 |
|
650 // decrease precision |
|
651 $nominal_bitrate = $nominal_bitrate / 1000; |
|
652 |
|
653 if ($nominal_bitrate < 128) { |
|
654 // q-1 to q4 |
|
655 $qval = ($nominal_bitrate - 64) / 16; |
|
656 } elseif ($nominal_bitrate < 256) { |
|
657 // q4 to q8 |
|
658 $qval = $nominal_bitrate / 32; |
|
659 } elseif ($nominal_bitrate < 320) { |
|
660 // q8 to q9 |
|
661 $qval = ($nominal_bitrate + 256) / 64; |
|
662 } else { |
|
663 // q9 to q10 |
|
664 $qval = ($nominal_bitrate + 1300) / 180; |
|
665 } |
|
666 //return $qval; // 5.031324 |
|
667 //return intval($qval); // 5 |
|
668 return round($qval, 1); // 5 or 4.9 |
|
669 } |
|
670 |
|
671 } |