mambax7 /
xoopseditors
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like getid3_xiph often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use getid3_xiph, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 27 | class getid3_xiph extends getid3_handler |
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| 28 | { |
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| 29 | |||
| 30 | public function Analyze() { |
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| 31 | |||
| 32 | $getid3 = $this->getid3; |
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| 33 | |||
| 34 | if ($getid3->option_tags_images) { |
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| 35 | $getid3->include_module('lib.image_size'); |
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| 36 | } |
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| 37 | |||
| 38 | fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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| 39 | |||
| 40 | $magic = fread($getid3->fp, 4); |
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| 41 | |||
| 42 | if ($magic == 'OggS') { |
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| 43 | return $this->ParseOgg(); |
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| 44 | } |
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| 45 | |||
| 46 | if ($magic == 'fLaC') { |
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| 47 | return $this->ParseFLAC(); |
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| 48 | } |
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| 49 | |||
| 50 | } |
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| 51 | |||
| 52 | |||
| 53 | |||
| 54 | private function ParseOgg() { |
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| 55 | |||
| 56 | $getid3 = $this->getid3; |
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| 57 | |||
| 58 | fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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| 59 | |||
| 60 | $getid3->info['audio'] = $getid3->info['ogg'] = array (); |
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| 61 | $info_ogg = &$getid3->info['ogg']; |
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| 62 | $info_audio = &$getid3->info['audio']; |
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| 63 | |||
| 64 | $getid3->info['fileformat'] = 'ogg'; |
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| 65 | |||
| 66 | |||
| 67 | //// Page 1 - Stream Header |
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| 68 | |||
| 69 | $ogg_page_info = $this->ParseOggPageHeader(); |
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| 70 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
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| 71 | |||
| 72 | if (ftell($getid3->fp) >= getid3::FREAD_BUFFER_SIZE) { |
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| 73 | throw new getid3_exception('Could not find start of Ogg page in the first '.getid3::FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg file?)'); |
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| 74 | } |
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| 75 | |||
| 76 | $file_data = fread($getid3->fp, $ogg_page_info['page_length']); |
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| 77 | $file_data_offset = 0; |
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|
Unused Code
introduced
by
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| 78 | |||
| 79 | |||
| 80 | // OggFLAC |
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| 81 | if (substr($file_data, 0, 4) == 'fLaC') { |
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| 82 | |||
| 83 | $info_audio['dataformat'] = 'flac'; |
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| 84 | $info_audio['bitrate_mode'] = 'vbr'; |
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| 85 | $info_audio['lossless'] = true; |
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| 86 | |||
| 87 | } |
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| 88 | |||
| 89 | |||
| 90 | // Ogg Vorbis |
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| 91 | elseif (substr($file_data, 1, 6) == 'vorbis') { |
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| 92 | |||
| 93 | $info_audio['dataformat'] = 'vorbis'; |
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| 94 | $info_audio['lossless'] = false; |
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| 95 | |||
| 96 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int($file_data[0]); |
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| 97 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['stream_type'] = substr($file_data, 1, 6); // hard-coded to 'vorbis' |
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| 98 | |||
| 99 | getid3_lib::ReadSequence('LittleEndian2Int', $info_ogg, $file_data, 7, |
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| 100 | array ( |
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| 101 | 'bitstreamversion' => 4, |
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| 102 | 'numberofchannels' => 1, |
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| 103 | 'samplerate' => 4, |
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| 104 | 'bitrate_max' => 4, |
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| 105 | 'bitrate_nominal' => 4, |
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| 106 | 'bitrate_min' => 4 |
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| 107 | ) |
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| 108 | ); |
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| 109 | |||
| 110 | $n28 = getid3_lib::LittleEndian2Int($file_data{28}); |
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| 111 | $info_ogg['blocksize_small'] = pow(2, $n28 & 0x0F); |
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| 112 | $info_ogg['blocksize_large'] = pow(2, ($n28 & 0xF0) >> 4); |
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| 113 | $info_ogg['stop_bit'] = $n28; |
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| 114 | |||
| 115 | $info_audio['channels'] = $info_ogg['numberofchannels']; |
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| 116 | $info_audio['sample_rate'] = $info_ogg['samplerate']; |
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| 117 | |||
| 118 | $info_audio['bitrate_mode'] = 'vbr'; // overridden if actually abr |
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| 119 | |||
| 120 | if ($info_ogg['bitrate_max'] == 0xFFFFFFFF) { |
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| 121 | unset($info_ogg['bitrate_max']); |
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| 122 | $info_audio['bitrate_mode'] = 'abr'; |
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| 123 | } |
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| 124 | |||
| 125 | if ($info_ogg['bitrate_nominal'] == 0xFFFFFFFF) { |
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| 126 | unset($info_ogg['bitrate_nominal']); |
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| 127 | } |
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| 128 | |||
| 129 | if ($info_ogg['bitrate_min'] == 0xFFFFFFFF) { |
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| 130 | unset($info_ogg['bitrate_min']); |
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| 131 | $info_audio['bitrate_mode'] = 'abr'; |
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| 132 | } |
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| 133 | } |
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| 134 | |||
| 135 | |||
| 136 | // Speex |
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| 137 | elseif (substr($file_data, 0, 8) == 'Speex ') { |
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| 138 | |||
| 139 | // http://www.speex.org/manual/node10.html |
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| 140 | |||
| 141 | $info_audio['dataformat'] = 'speex'; |
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| 142 | $getid3->info['mime_type'] = 'audio/speex'; |
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| 143 | $info_audio['bitrate_mode'] = 'abr'; |
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| 144 | $info_audio['lossless'] = false; |
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| 145 | |||
| 146 | getid3_lib::ReadSequence('LittleEndian2Int', $info_ogg['pageheader'][$ogg_page_info['page_seqno']], $file_data, 0, |
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| 147 | array ( |
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| 148 | 'speex_string' => -8, // hard-coded to 'Speex ' |
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| 149 | 'speex_version' => -20, // string |
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| 150 | 'speex_version_id' => 4, |
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| 151 | 'header_size' => 4, |
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| 152 | 'rate' => 4, |
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| 153 | 'mode' => 4, |
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| 154 | 'mode_bitstream_version' => 4, |
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| 155 | 'nb_channels' => 4, |
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| 156 | 'bitrate' => 4, |
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| 157 | 'framesize' => 4, |
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| 158 | 'vbr' => 4, |
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| 159 | 'frames_per_packet' => 4, |
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| 160 | 'extra_headers' => 4, |
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| 161 | 'reserved1' => 4, |
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| 162 | 'reserved2' => 4 |
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| 163 | ) |
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| 164 | ); |
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| 165 | |||
| 166 | $getid3->info['speex']['speex_version'] = trim($info_ogg['pageheader'][$ogg_page_info['page_seqno']]['speex_version']); |
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| 167 | $getid3->info['speex']['sample_rate'] = $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['rate']; |
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| 168 | $getid3->info['speex']['channels'] = $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['nb_channels']; |
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| 169 | $getid3->info['speex']['vbr'] = (bool)$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['vbr']; |
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| 170 | $getid3->info['speex']['band_type'] = getid3_xiph::SpeexBandModeLookup($info_ogg['pageheader'][$ogg_page_info['page_seqno']]['mode']); |
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| 171 | |||
| 172 | $info_audio['sample_rate'] = $getid3->info['speex']['sample_rate']; |
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| 173 | $info_audio['channels'] = $getid3->info['speex']['channels']; |
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| 174 | |||
| 175 | if ($getid3->info['speex']['vbr']) { |
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| 176 | $info_audio['bitrate_mode'] = 'vbr'; |
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| 177 | } |
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| 178 | } |
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| 179 | |||
| 180 | // Unsupported Ogg file |
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| 181 | else { |
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| 182 | |||
| 183 | throw new getid3_exception('Expecting either "Speex " or "vorbis" identifier strings, found neither'); |
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| 184 | } |
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| 185 | |||
| 186 | |||
| 187 | //// Page 2 - Comment Header |
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| 188 | |||
| 189 | $ogg_page_info = $this->ParseOggPageHeader(); |
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| 190 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
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| 191 | |||
| 192 | switch ($info_audio['dataformat']) { |
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| 193 | |||
| 194 | case 'vorbis': |
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| 195 | $file_data = fread($getid3->fp, $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['page_length']); |
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| 196 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($file_data, 0, 1)); |
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| 197 | $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['stream_type'] = substr($file_data, 1, 6); // hard-coded to 'vorbis' |
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| 198 | $this->ParseVorbisCommentsFilepointer(); |
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| 199 | break; |
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| 200 | |||
| 201 | case 'flac': |
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| 202 | if (!$this->FLACparseMETAdata()) { |
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| 203 | throw new getid3_exception('Failed to parse FLAC headers'); |
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| 204 | } |
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| 205 | break; |
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| 206 | |||
| 207 | case 'speex': |
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| 208 | fseek($getid3->fp, $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['page_length'], SEEK_CUR); |
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| 209 | $this->ParseVorbisCommentsFilepointer(); |
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| 210 | break; |
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| 211 | } |
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| 212 | |||
| 213 | |||
| 214 | //// Last Page - Number of Samples |
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| 215 | |||
| 216 | fseek($getid3->fp, max($getid3->info['avdataend'] - getid3::FREAD_BUFFER_SIZE, 0), SEEK_SET); |
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| 217 | $last_chunk_of_ogg = strrev(fread($getid3->fp, getid3::FREAD_BUFFER_SIZE)); |
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| 218 | |||
| 219 | if ($last_OggS_postion = strpos($last_chunk_of_ogg, 'SggO')) { |
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| 220 | fseek($getid3->fp, $getid3->info['avdataend'] - ($last_OggS_postion + strlen('SggO')), SEEK_SET); |
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| 221 | $getid3->info['avdataend'] = ftell($getid3->fp); |
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| 222 | $info_ogg['pageheader']['eos'] = $this->ParseOggPageHeader(); |
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| 223 | $info_ogg['samples'] = $info_ogg['pageheader']['eos']['pcm_abs_position']; |
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| 224 | $info_ogg['bitrate_average'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / ($info_ogg['samples'] / $info_audio['sample_rate']); |
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| 225 | } |
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| 226 | |||
| 227 | if (!empty($info_ogg['bitrate_average'])) { |
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| 228 | $info_audio['bitrate'] = $info_ogg['bitrate_average']; |
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| 229 | } elseif (!empty($info_ogg['bitrate_nominal'])) { |
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| 230 | $info_audio['bitrate'] = $info_ogg['bitrate_nominal']; |
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| 231 | } elseif (!empty($info_ogg['bitrate_min']) && !empty($info_ogg['bitrate_max'])) { |
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| 232 | $info_audio['bitrate'] = ($info_ogg['bitrate_min'] + $info_ogg['bitrate_max']) / 2; |
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| 233 | } |
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| 234 | if (isset($info_audio['bitrate']) && !isset($getid3->info['playtime_seconds'])) { |
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| 235 | $getid3->info['playtime_seconds'] = (float)((($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $info_audio['bitrate']); |
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| 236 | } |
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| 237 | |||
| 238 | if (isset($info_ogg['vendor'])) { |
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| 239 | $info_audio['encoder'] = preg_replace('/^Encoded with /', '', $info_ogg['vendor']); |
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| 240 | |||
| 241 | // Vorbis only |
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| 242 | if ($info_audio['dataformat'] == 'vorbis') { |
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| 243 | |||
| 244 | // Vorbis 1.0 starts with Xiph.Org |
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| 245 | if (preg_match('/^Xiph.Org/', $info_audio['encoder'])) { |
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| 246 | |||
| 247 | if ($info_audio['bitrate_mode'] == 'abr') { |
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| 248 | |||
| 249 | // Set -b 128 on abr files |
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| 250 | $info_audio['encoder_options'] = '-b '.round($info_ogg['bitrate_nominal'] / 1000); |
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| 251 | |||
| 252 | } elseif (($info_audio['bitrate_mode'] == 'vbr') && ($info_audio['channels'] == 2) && ($info_audio['sample_rate'] >= 44100) && ($info_audio['sample_rate'] <= 48000)) { |
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| 253 | // Set -q N on vbr files |
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| 254 | $info_audio['encoder_options'] = '-q '.getid3_xiph::GetQualityFromNominalBitrate($info_ogg['bitrate_nominal']); |
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| 255 | } |
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| 256 | } |
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| 257 | |||
| 258 | if (empty($info_audio['encoder_options']) && !empty($info_ogg['bitrate_nominal'])) { |
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| 259 | $info_audio['encoder_options'] = 'Nominal bitrate: '.intval(round($info_ogg['bitrate_nominal'] / 1000)).'kbps'; |
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| 260 | } |
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| 261 | } |
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| 262 | } |
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| 263 | |||
| 264 | return true; |
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| 265 | } |
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| 266 | |||
| 267 | |||
| 268 | |||
| 269 | private function ParseOggPageHeader() { |
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| 270 | |||
| 271 | $getid3 = $this->getid3; |
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| 272 | |||
| 273 | // http://xiph.org/ogg/vorbis/doc/framing.html |
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| 274 | $ogg_header['page_start_offset'] = ftell($getid3->fp); // where we started from in the file |
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| 275 | |||
| 276 | $file_data = fread($getid3->fp, getid3::FREAD_BUFFER_SIZE); |
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| 277 | $file_data_offset = 0; |
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| 278 | |||
| 279 | while ((substr($file_data, $file_data_offset++, 4) != 'OggS')) { |
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| 280 | if ((ftell($getid3->fp) - $ogg_header['page_start_offset']) >= getid3::FREAD_BUFFER_SIZE) { |
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| 281 | // should be found before here |
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| 282 | return false; |
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| 283 | } |
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| 284 | if ((($file_data_offset + 28) > strlen($file_data)) || (strlen($file_data) < 28)) { |
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| 285 | if (feof($getid3->fp) || (($file_data .= fread($getid3->fp, getid3::FREAD_BUFFER_SIZE)) === false)) { |
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| 286 | // get some more data, unless eof, in which case fail |
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| 287 | return false; |
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| 288 | } |
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| 289 | } |
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| 290 | } |
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| 291 | |||
| 292 | $file_data_offset += 3; // page, delimited by 'OggS' |
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| 293 | |||
| 294 | getid3_lib::ReadSequence('LittleEndian2Int', $ogg_header, $file_data, $file_data_offset, |
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| 295 | array ( |
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| 296 | 'stream_structver' => 1, |
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| 297 | 'flags_raw' => 1, |
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| 298 | 'pcm_abs_position' => 8, |
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| 299 | 'stream_serialno' => 4, |
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| 300 | 'page_seqno' => 4, |
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| 301 | 'page_checksum' => 4, |
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| 302 | 'page_segments' => 1 |
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| 303 | ) |
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| 304 | ); |
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| 305 | |||
| 306 | $file_data_offset += 23; |
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| 307 | |||
| 308 | $ogg_header['flags']['fresh'] = (bool)($ogg_header['flags_raw'] & 0x01); // fresh packet |
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| 309 | $ogg_header['flags']['bos'] = (bool)($ogg_header['flags_raw'] & 0x02); // first page of logical bitstream (bos) |
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| 310 | $ogg_header['flags']['eos'] = (bool)($ogg_header['flags_raw'] & 0x04); // last page of logical bitstream (eos) |
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| 311 | |||
| 312 | $ogg_header['page_length'] = 0; |
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| 313 | for ($i = 0; $i < $ogg_header['page_segments']; $i++) { |
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| 314 | $ogg_header['segment_table'][$i] = getid3_lib::LittleEndian2Int($file_data{$file_data_offset++}); |
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| 315 | $ogg_header['page_length'] += $ogg_header['segment_table'][$i]; |
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| 316 | } |
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| 317 | $ogg_header['header_end_offset'] = $ogg_header['page_start_offset'] + $file_data_offset; |
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| 318 | $ogg_header['page_end_offset'] = $ogg_header['header_end_offset'] + $ogg_header['page_length']; |
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| 319 | fseek($getid3->fp, $ogg_header['header_end_offset'], SEEK_SET); |
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| 320 | |||
| 321 | return $ogg_header; |
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| 322 | } |
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| 323 | |||
| 324 | |||
| 325 | |||
| 326 | private function ParseVorbisCommentsFilepointer() { |
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| 327 | |||
| 328 | $getid3 = $this->getid3; |
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| 329 | |||
| 330 | $original_offset = ftell($getid3->fp); |
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| 331 | $comment_start_offset = $original_offset; |
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| 332 | $comment_data_offset = 0; |
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| 333 | $vorbis_comment_page = 1; |
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| 334 | |||
| 335 | switch ($getid3->info['audio']['dataformat']) { |
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| 336 | |||
| 337 | case 'vorbis': |
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| 338 | $comment_start_offset = $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_start_offset']; // Second Ogg page, after header block |
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| 339 | fseek($getid3->fp, $comment_start_offset, SEEK_SET); |
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| 340 | $comment_data_offset = 27 + $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_segments']; |
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| 341 | $comment_data = fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1) + $comment_data_offset); |
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| 342 | $comment_data_offset += (strlen('vorbis') + 1); |
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| 343 | break; |
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| 344 | |||
| 345 | |||
| 346 | case 'flac': |
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| 347 | fseek($getid3->fp, $getid3->info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET); |
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| 348 | $comment_data = fread($getid3->fp, $getid3->info['flac']['VORBIS_COMMENT']['raw']['block_length']); |
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| 349 | break; |
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| 350 | |||
| 351 | |||
| 352 | case 'speex': |
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| 353 | $comment_start_offset = $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_start_offset']; // Second Ogg page, after header block |
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| 354 | fseek($getid3->fp, $comment_start_offset, SEEK_SET); |
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| 355 | $comment_data_offset = 27 + $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_segments']; |
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| 356 | $comment_data = fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1) + $comment_data_offset); |
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| 357 | break; |
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| 358 | |||
| 359 | |||
| 360 | default: |
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| 361 | return false; |
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| 362 | } |
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| 363 | |||
| 364 | $vendor_size = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
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| 365 | $comment_data_offset += 4; |
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| 366 | |||
| 367 | $getid3->info['ogg']['vendor'] = substr($comment_data, $comment_data_offset, $vendor_size); |
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| 368 | $comment_data_offset += $vendor_size; |
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| 369 | |||
| 370 | $comments_count = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
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| 371 | $comment_data_offset += 4; |
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| 372 | |||
| 373 | $getid3->info['avdataoffset'] = $comment_start_offset + $comment_data_offset; |
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| 374 | |||
| 375 | for ($i = 0; $i < $comments_count; $i++) { |
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| 376 | |||
| 377 | $getid3->info['ogg']['comments_raw'][$i]['dataoffset'] = $comment_start_offset + $comment_data_offset; |
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| 378 | |||
| 379 | if (ftell($getid3->fp) < ($getid3->info['ogg']['comments_raw'][$i]['dataoffset'] + 4)) { |
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| 380 | $vorbis_comment_page++; |
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| 381 | |||
| 382 | $ogg_page_info = $this->ParseOggPageHeader(); |
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| 383 | $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
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| 384 | |||
| 385 | // First, save what we haven't read yet |
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| 386 | $as_yet_unused_data = substr($comment_data, $comment_data_offset); |
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| 387 | |||
| 388 | // Then take that data off the end |
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| 389 | $comment_data = substr($comment_data, 0, $comment_data_offset); |
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| 390 | |||
| 391 | // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
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| 392 | $comment_data .= str_repeat("\x00", 27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
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| 393 | $comment_data_offset += (27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
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| 394 | |||
| 395 | // Finally, stick the unused data back on the end |
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| 396 | $comment_data .= $as_yet_unused_data; |
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| 397 | |||
| 398 | $comment_data .= fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1)); |
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| 399 | } |
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| 400 | $getid3->info['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
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| 401 | |||
| 402 | // replace avdataoffset with position just after the last vorbiscomment |
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| 403 | $getid3->info['avdataoffset'] = $getid3->info['ogg']['comments_raw'][$i]['dataoffset'] + $getid3->info['ogg']['comments_raw'][$i]['size'] + 4; |
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| 404 | |||
| 405 | $comment_data_offset += 4; |
||
| 406 | while ((strlen($comment_data) - $comment_data_offset) < $getid3->info['ogg']['comments_raw'][$i]['size']) { |
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| 407 | |||
| 408 | if (($getid3->info['ogg']['comments_raw'][$i]['size'] > $getid3->info['avdataend']) || ($getid3->info['ogg']['comments_raw'][$i]['size'] < 0)) { |
||
| 409 | throw new getid3_exception('Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($getid3->info['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments'); |
||
| 410 | } |
||
| 411 | |||
| 412 | $vorbis_comment_page++; |
||
| 413 | |||
| 414 | $ogg_page_info = $this->ParseOggPageHeader(); |
||
| 415 | $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
||
| 416 | |||
| 417 | // First, save what we haven't read yet |
||
| 418 | $as_yet_unused_data = substr($comment_data, $comment_data_offset); |
||
| 419 | |||
| 420 | // Then take that data off the end |
||
| 421 | $comment_data = substr($comment_data, 0, $comment_data_offset); |
||
| 422 | |||
| 423 | // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
||
| 424 | $comment_data .= str_repeat("\x00", 27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
||
| 425 | $comment_data_offset += (27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
||
| 426 | |||
| 427 | // Finally, stick the unused data back on the end |
||
| 428 | $comment_data .= $as_yet_unused_data; |
||
| 429 | |||
| 430 | //$comment_data .= fread($getid3->fp, $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_length']); |
||
| 431 | $comment_data .= fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1)); |
||
| 432 | |||
| 433 | //$filebaseoffset += $ogg_page_info['header_end_offset'] - $ogg_page_info['page_start_offset']; |
||
| 434 | } |
||
| 435 | $comment_string = substr($comment_data, $comment_data_offset, $getid3->info['ogg']['comments_raw'][$i]['size']); |
||
| 436 | $comment_data_offset += $getid3->info['ogg']['comments_raw'][$i]['size']; |
||
| 437 | |||
| 438 | if (!$comment_string) { |
||
| 439 | |||
| 440 | // no comment? |
||
| 441 | $getid3->warning('Blank Ogg comment ['.$i.']'); |
||
| 442 | |||
| 443 | } elseif (strstr($comment_string, '=')) { |
||
| 444 | |||
| 445 | $comment_exploded = explode('=', $comment_string, 2); |
||
| 446 | $getid3->info['ogg']['comments_raw'][$i]['key'] = strtoupper($comment_exploded[0]); |
||
| 447 | $getid3->info['ogg']['comments_raw'][$i]['value'] = @$comment_exploded[1]; |
||
| 448 | $getid3->info['ogg']['comments_raw'][$i]['data'] = base64_decode($getid3->info['ogg']['comments_raw'][$i]['value']); |
||
| 449 | |||
| 450 | $getid3->info['ogg']['comments'][strtolower($getid3->info['ogg']['comments_raw'][$i]['key'])][] = $getid3->info['ogg']['comments_raw'][$i]['value']; |
||
| 451 | |||
| 452 | if ($getid3->option_tags_images) { |
||
| 453 | $image_chunk_check = getid3_lib_image_size::get($getid3->info['ogg']['comments_raw'][$i]['data']); |
||
| 454 | $getid3->info['ogg']['comments_raw'][$i]['image_mime'] = image_type_to_mime_type($image_chunk_check[2]); |
||
| 455 | } |
||
| 456 | |||
| 457 | if (!@$getid3->info['ogg']['comments_raw'][$i]['image_mime'] || ($getid3->info['ogg']['comments_raw'][$i]['image_mime'] == 'application/octet-stream')) { |
||
| 458 | unset($getid3->info['ogg']['comments_raw'][$i]['image_mime']); |
||
| 459 | unset($getid3->info['ogg']['comments_raw'][$i]['data']); |
||
| 460 | } |
||
| 461 | |||
| 462 | |||
| 463 | } else { |
||
| 464 | |||
| 465 | $getid3->warning('[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$comment_string); |
||
| 466 | } |
||
| 467 | } |
||
| 468 | |||
| 469 | |||
| 470 | // Replay Gain Adjustment |
||
| 471 | // http://privatewww.essex.ac.uk/~djmrob/replaygain/ |
||
| 472 | if (isset($getid3->info['ogg']['comments']) && is_array($getid3->info['ogg']['comments'])) { |
||
| 473 | foreach ($getid3->info['ogg']['comments'] as $index => $commentvalue) { |
||
| 474 | switch ($index) { |
||
| 475 | case 'rg_audiophile': |
||
| 476 | case 'replaygain_album_gain': |
||
| 477 | $getid3->info['replay_gain']['album']['adjustment'] = (float)$commentvalue[0]; |
||
| 478 | unset($getid3->info['ogg']['comments'][$index]); |
||
| 479 | break; |
||
| 480 | |||
| 481 | case 'rg_radio': |
||
| 482 | case 'replaygain_track_gain': |
||
| 483 | $getid3->info['replay_gain']['track']['adjustment'] = (float)$commentvalue[0]; |
||
| 484 | unset($getid3->info['ogg']['comments'][$index]); |
||
| 485 | break; |
||
| 486 | |||
| 487 | case 'replaygain_album_peak': |
||
| 488 | $getid3->info['replay_gain']['album']['peak'] = (float)$commentvalue[0]; |
||
| 489 | unset($getid3->info['ogg']['comments'][$index]); |
||
| 490 | break; |
||
| 491 | |||
| 492 | case 'rg_peak': |
||
| 493 | case 'replaygain_track_peak': |
||
| 494 | $getid3->info['replay_gain']['track']['peak'] = (float)$commentvalue[0]; |
||
| 495 | unset($getid3->info['ogg']['comments'][$index]); |
||
| 496 | break; |
||
| 497 | |||
| 498 | case 'replaygain_reference_loudness': |
||
| 499 | $getid3->info['replay_gain']['reference_volume'] = (float)$commentvalue[0]; |
||
| 500 | unset($getid3->info['ogg']['comments'][$index]); |
||
| 501 | break; |
||
| 502 | } |
||
| 503 | } |
||
| 504 | } |
||
| 505 | |||
| 506 | fseek($getid3->fp, $original_offset, SEEK_SET); |
||
| 507 | |||
| 508 | return true; |
||
| 509 | } |
||
| 510 | |||
| 511 | |||
| 512 | |||
| 513 | private function ParseFLAC() { |
||
| 514 | |||
| 515 | $getid3 = $this->getid3; |
||
| 516 | |||
| 517 | // http://flac.sourceforge.net/format.html |
||
| 518 | |||
| 519 | $getid3->info['fileformat'] = 'flac'; |
||
| 520 | $getid3->info['audio']['dataformat'] = 'flac'; |
||
| 521 | $getid3->info['audio']['bitrate_mode'] = 'vbr'; |
||
| 522 | $getid3->info['audio']['lossless'] = true; |
||
| 523 | |||
| 524 | return $this->FLACparseMETAdata(); |
||
| 525 | } |
||
| 526 | |||
| 527 | |||
| 528 | |||
| 529 | private function FLACparseMETAdata() { |
||
| 530 | |||
| 531 | $getid3 = $this->getid3; |
||
| 532 | |||
| 533 | do { |
||
| 534 | |||
| 535 | $meta_data_block_offset = ftell($getid3->fp); |
||
| 536 | $meta_data_block_header = fread($getid3->fp, 4); |
||
| 537 | $meta_data_last_block_flag = (bool)(getid3_lib::BigEndian2Int($meta_data_block_header[0]) & 0x80); |
||
| 538 | $meta_data_block_type = getid3_lib::BigEndian2Int($meta_data_block_header[0]) & 0x7F; |
||
| 539 | $meta_data_block_length = getid3_lib::BigEndian2Int(substr($meta_data_block_header, 1, 3)); |
||
| 540 | $meta_data_block_type_text = getid3_xiph::FLACmetaBlockTypeLookup($meta_data_block_type); |
||
| 541 | |||
| 542 | if ($meta_data_block_length < 0) { |
||
| 543 | throw new getid3_exception('corrupt or invalid METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$meta_data_block_type.') at offset '.$meta_data_block_offset); |
||
| 544 | } |
||
| 545 | |||
| 546 | $getid3->info['flac'][$meta_data_block_type_text]['raw'] = array ( |
||
| 547 | 'offset' => $meta_data_block_offset, |
||
| 548 | 'last_meta_block' => $meta_data_last_block_flag, |
||
| 549 | 'block_type' => $meta_data_block_type, |
||
| 550 | 'block_type_text' => $meta_data_block_type_text, |
||
| 551 | 'block_length' => $meta_data_block_length, |
||
| 552 | 'block_data' => @fread($getid3->fp, $meta_data_block_length) |
||
| 553 | ); |
||
| 554 | $getid3->info['avdataoffset'] = ftell($getid3->fp); |
||
| 555 | |||
| 556 | switch ($meta_data_block_type_text) { |
||
| 557 | |||
| 558 | case 'STREAMINFO': |
||
| 559 | if (!$this->FLACparseSTREAMINFO($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
||
| 560 | return false; |
||
| 561 | } |
||
| 562 | break; |
||
| 563 | |||
| 564 | case 'PADDING': |
||
| 565 | // ignore |
||
| 566 | break; |
||
| 567 | |||
| 568 | case 'APPLICATION': |
||
| 569 | if (!$this->FLACparseAPPLICATION($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
||
| 570 | return false; |
||
| 571 | } |
||
| 572 | break; |
||
| 573 | |||
| 574 | case 'SEEKTABLE': |
||
| 575 | if (!$this->FLACparseSEEKTABLE($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
||
| 576 | return false; |
||
| 577 | } |
||
| 578 | break; |
||
| 579 | |||
| 580 | case 'VORBIS_COMMENT': |
||
| 581 | $old_offset = ftell($getid3->fp); |
||
| 582 | fseek($getid3->fp, 0 - $meta_data_block_length, SEEK_CUR); |
||
| 583 | $this->ParseVorbisCommentsFilepointer($getid3->fp, $getid3->info); |
||
| 584 | fseek($getid3->fp, $old_offset, SEEK_SET); |
||
| 585 | break; |
||
| 586 | |||
| 587 | case 'CUESHEET': |
||
| 588 | if (!$this->FLACparseCUESHEET($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
||
| 589 | return false; |
||
| 590 | } |
||
| 591 | break; |
||
| 592 | |||
| 593 | case 'PICTURE': |
||
| 594 | if (!$this->FLACparsePICTURE($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
||
| 595 | return false; |
||
| 596 | } |
||
| 597 | break; |
||
| 598 | |||
| 599 | default: |
||
| 600 | $getid3->warning('Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$meta_data_block_type.') at offset '.$meta_data_block_offset); |
||
| 601 | } |
||
| 602 | |||
| 603 | } while ($meta_data_last_block_flag === false); |
||
| 604 | |||
| 605 | |||
| 606 | if (isset($getid3->info['flac']['STREAMINFO'])) { |
||
| 607 | $getid3->info['flac']['compressed_audio_bytes'] = $getid3->info['avdataend'] - $getid3->info['avdataoffset']; |
||
| 608 | $getid3->info['flac']['uncompressed_audio_bytes'] = $getid3->info['flac']['STREAMINFO']['samples_stream'] * $getid3->info['flac']['STREAMINFO']['channels'] * ($getid3->info['flac']['STREAMINFO']['bits_per_sample'] / 8); |
||
| 609 | $getid3->info['flac']['compression_ratio'] = $getid3->info['flac']['compressed_audio_bytes'] / $getid3->info['flac']['uncompressed_audio_bytes']; |
||
| 610 | } |
||
| 611 | |||
| 612 | // set md5_data_source - built into flac 0.5+ |
||
| 613 | if (isset($getid3->info['flac']['STREAMINFO']['audio_signature'])) { |
||
| 614 | |||
| 615 | if ($getid3->info['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) { |
||
| 616 | $getid3->warning('FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)'); |
||
| 617 | |||
| 618 | } else { |
||
| 619 | |||
| 620 | $getid3->info['md5_data_source'] = ''; |
||
| 621 | $md5 = $getid3->info['flac']['STREAMINFO']['audio_signature']; |
||
| 622 | for ($i = 0; $i < strlen($md5); $i++) { |
||
| 623 | $getid3->info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); |
||
| 624 | } |
||
| 625 | if (!preg_match('/^[0-9a-f]{32}$/', $getid3->info['md5_data_source'])) { |
||
| 626 | unset($getid3->info['md5_data_source']); |
||
| 627 | } |
||
| 628 | |||
| 629 | } |
||
| 630 | |||
| 631 | } |
||
| 632 | |||
| 633 | $getid3->info['audio']['bits_per_sample'] = $getid3->info['flac']['STREAMINFO']['bits_per_sample']; |
||
| 634 | if ($getid3->info['audio']['bits_per_sample'] == 8) { |
||
| 635 | // special case |
||
| 636 | // must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value |
||
| 637 | // MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed |
||
| 638 | $getid3->warning('FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file'); |
||
| 639 | } |
||
| 640 | if (!empty($getid3->info['ogg']['vendor'])) { |
||
| 641 | $getid3->info['audio']['encoder'] = $getid3->info['ogg']['vendor']; |
||
| 642 | } |
||
| 643 | |||
| 644 | return true; |
||
| 645 | } |
||
| 646 | |||
| 647 | |||
| 648 | |||
| 649 | private function FLACparseSTREAMINFO($meta_data_block_data) { |
||
| 650 | |||
| 651 | $getid3 = $this->getid3; |
||
| 652 | |||
| 653 | getid3_lib::ReadSequence('BigEndian2Int', $getid3->info['flac']['STREAMINFO'], $meta_data_block_data, 0, |
||
| 654 | array ( |
||
| 655 | 'min_block_size' => 2, |
||
| 656 | 'max_block_size' => 2, |
||
| 657 | 'min_frame_size' => 3, |
||
| 658 | 'max_frame_size' => 3 |
||
| 659 | ) |
||
| 660 | ); |
||
| 661 | |||
| 662 | $sample_rate_channels_sample_bits_stream_samples = getid3_lib::BigEndian2Bin(substr($meta_data_block_data, 10, 8)); |
||
| 663 | |||
| 664 | $getid3->info['flac']['STREAMINFO']['sample_rate'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 0, 20)); |
||
| 665 | $getid3->info['flac']['STREAMINFO']['channels'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 20, 3)) + 1; |
||
| 666 | $getid3->info['flac']['STREAMINFO']['bits_per_sample'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 23, 5)) + 1; |
||
| 667 | $getid3->info['flac']['STREAMINFO']['samples_stream'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 28, 36)); // bindec() returns float in case of int overrun |
||
| 668 | $getid3->info['flac']['STREAMINFO']['audio_signature'] = substr($meta_data_block_data, 18, 16); |
||
| 669 | |||
| 670 | if (!empty($getid3->info['flac']['STREAMINFO']['sample_rate'])) { |
||
| 671 | |||
| 672 | $getid3->info['audio']['bitrate_mode'] = 'vbr'; |
||
| 673 | $getid3->info['audio']['sample_rate'] = $getid3->info['flac']['STREAMINFO']['sample_rate']; |
||
| 674 | $getid3->info['audio']['channels'] = $getid3->info['flac']['STREAMINFO']['channels']; |
||
| 675 | $getid3->info['audio']['bits_per_sample'] = $getid3->info['flac']['STREAMINFO']['bits_per_sample']; |
||
| 676 | $getid3->info['playtime_seconds'] = $getid3->info['flac']['STREAMINFO']['samples_stream'] / $getid3->info['flac']['STREAMINFO']['sample_rate']; |
||
| 677 | $getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['playtime_seconds']; |
||
| 678 | |||
| 679 | } else { |
||
| 680 | |||
| 681 | throw new getid3_exception('Corrupt METAdata block: STREAMINFO'); |
||
| 682 | } |
||
| 683 | |||
| 684 | unset($getid3->info['flac']['STREAMINFO']['raw']); |
||
| 685 | |||
| 686 | return true; |
||
| 687 | } |
||
| 688 | |||
| 689 | |||
| 690 | |||
| 691 | private function FLACparseAPPLICATION($meta_data_block_data) { |
||
| 692 | |||
| 693 | $getid3 = $this->getid3; |
||
| 694 | |||
| 695 | $application_id = getid3_lib::BigEndian2Int(substr($meta_data_block_data, 0, 4)); |
||
| 696 | |||
| 697 | $getid3->info['flac']['APPLICATION'][$application_id]['name'] = getid3_xiph::FLACapplicationIDLookup($application_id); |
||
| 698 | $getid3->info['flac']['APPLICATION'][$application_id]['data'] = substr($meta_data_block_data, 4); |
||
| 699 | |||
| 700 | unset($getid3->info['flac']['APPLICATION']['raw']); |
||
| 701 | |||
| 702 | return true; |
||
| 703 | } |
||
| 704 | |||
| 705 | |||
| 706 | |||
| 707 | private function FLACparseSEEKTABLE($meta_data_block_data) { |
||
| 708 | |||
| 709 | $getid3 = $this->getid3; |
||
| 710 | |||
| 711 | $offset = 0; |
||
| 712 | $meta_data_block_length = strlen($meta_data_block_data); |
||
| 713 | while ($offset < $meta_data_block_length) { |
||
| 714 | $sample_number_string = substr($meta_data_block_data, $offset, 8); |
||
| 715 | $offset += 8; |
||
| 716 | if ($sample_number_string == "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF") { |
||
| 717 | |||
| 718 | // placeholder point |
||
| 719 | @$getid3->info['flac']['SEEKTABLE']['placeholders']++; |
||
| 720 | $offset += 10; |
||
| 721 | |||
| 722 | } else { |
||
| 723 | |||
| 724 | $sample_number = getid3_lib::BigEndian2Int($sample_number_string); |
||
| 725 | |||
| 726 | $getid3->info['flac']['SEEKTABLE'][$sample_number]['offset'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
||
| 727 | $offset += 8; |
||
| 728 | |||
| 729 | $getid3->info['flac']['SEEKTABLE'][$sample_number]['samples'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 2)); |
||
| 730 | $offset += 2; |
||
| 731 | |||
| 732 | } |
||
| 733 | } |
||
| 734 | |||
| 735 | unset($getid3->info['flac']['SEEKTABLE']['raw']); |
||
| 736 | |||
| 737 | return true; |
||
| 738 | } |
||
| 739 | |||
| 740 | |||
| 741 | |||
| 742 | private function FLACparseCUESHEET($meta_data_block_data) { |
||
| 743 | |||
| 744 | $getid3 = $this->getid3; |
||
| 745 | |||
| 746 | $getid3->info['flac']['CUESHEET']['media_catalog_number'] = trim(substr($meta_data_block_data, 0, 128), "\0"); |
||
| 747 | $getid3->info['flac']['CUESHEET']['lead_in_samples'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, 128, 8)); |
||
| 748 | $getid3->info['flac']['CUESHEET']['flags']['is_cd'] = (bool)(getid3_lib::BigEndian2Int($meta_data_block_data[136]) & 0x80); |
||
| 749 | $getid3->info['flac']['CUESHEET']['number_tracks'] = getid3_lib::BigEndian2Int($meta_data_block_data[395]); |
||
| 750 | |||
| 751 | $offset = 396; |
||
| 752 | |||
| 753 | for ($track = 0; $track < $getid3->info['flac']['CUESHEET']['number_tracks']; $track++) { |
||
| 754 | |||
| 755 | $track_sample_offset = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
||
| 756 | $offset += 8; |
||
| 757 | |||
| 758 | $track_number = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
||
| 759 | |||
| 760 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['sample_offset'] = $track_sample_offset; |
||
| 761 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['isrc'] = substr($meta_data_block_data, $offset, 12); |
||
| 762 | $offset += 12; |
||
| 763 | |||
| 764 | $track_flags_raw = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
||
| 765 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['flags']['is_audio'] = (bool)($track_flags_raw & 0x80); |
||
| 766 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['flags']['pre_emphasis'] = (bool)($track_flags_raw & 0x40); |
||
| 767 | |||
| 768 | $offset += 13; // reserved |
||
| 769 | |||
| 770 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['index_points'] = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
||
| 771 | |||
| 772 | for ($index = 0; $index < $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['index_points']; $index++) { |
||
| 773 | |||
| 774 | $index_sample_offset = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
||
| 775 | $offset += 8; |
||
| 776 | |||
| 777 | $index_number = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
||
| 778 | $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['indexes'][$index_number] = $index_sample_offset; |
||
| 779 | |||
| 780 | $offset += 3; // reserved |
||
| 781 | } |
||
| 782 | } |
||
| 783 | |||
| 784 | unset($getid3->info['flac']['CUESHEET']['raw']); |
||
| 785 | |||
| 786 | return true; |
||
| 787 | } |
||
| 788 | |||
| 789 | |||
| 790 | |||
| 791 | private function FLACparsePICTURE($meta_data_block_data) { |
||
| 792 | |||
| 793 | $getid3 = $this->getid3; |
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| 794 | |||
| 795 | $picture = &$getid3->info['flac']['PICTURE'][sizeof($getid3->info['flac']['PICTURE']) - 1]; |
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| 796 | |||
| 797 | $offset = 0; |
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| 798 | |||
| 799 | $picture['type'] = $this->FLACpictureTypeLookup(getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4))); |
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| 800 | $offset += 4; |
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| 801 | |||
| 802 | $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 803 | $offset += 4; |
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| 804 | |||
| 805 | $picture['mime_type'] = substr($meta_data_block_data, $offset, $length); |
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| 806 | $offset += $length; |
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| 807 | |||
| 808 | $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 809 | $offset += 4; |
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| 810 | |||
| 811 | $picture['description'] = substr($meta_data_block_data, $offset, $length); |
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| 812 | $offset += $length; |
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| 813 | |||
| 814 | $picture['width'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 815 | $offset += 4; |
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| 816 | |||
| 817 | $picture['height'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 818 | $offset += 4; |
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| 819 | |||
| 820 | $picture['color_depth'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 821 | $offset += 4; |
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| 822 | |||
| 823 | $picture['colors_indexed'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 824 | $offset += 4; |
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| 825 | |||
| 826 | $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
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| 827 | $offset += 4; |
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| 828 | |||
| 829 | $picture['image_data'] = substr($meta_data_block_data, $offset, $length); |
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| 830 | $offset += $length; |
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| 831 | |||
| 832 | unset($getid3->info['flac']['PICTURE']['raw']); |
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| 833 | |||
| 834 | return true; |
||
| 835 | } |
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| 836 | |||
| 837 | |||
| 838 | |||
| 839 | public static function SpeexBandModeLookup($mode) { |
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| 840 | |||
| 841 | static $lookup = array ( |
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| 842 | 0 => 'narrow', |
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| 843 | 1 => 'wide', |
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| 844 | 2 => 'ultra-wide' |
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| 845 | ); |
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| 846 | return (isset($lookup[$mode]) ? $lookup[$mode] : null); |
||
| 847 | } |
||
| 848 | |||
| 849 | |||
| 850 | |||
| 851 | public static function OggPageSegmentLength($ogg_info_array, $segment_number=1) { |
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| 852 | |||
| 853 | for ($i = 0; $i < $segment_number; $i++) { |
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| 854 | $segment_length = 0; |
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| 855 | foreach ($ogg_info_array['segment_table'] as $key => $value) { |
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| 856 | $segment_length += $value; |
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| 857 | if ($value < 255) { |
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| 858 | break; |
||
| 859 | } |
||
| 860 | } |
||
| 861 | } |
||
| 862 | return $segment_length; |
||
| 863 | } |
||
| 864 | |||
| 865 | |||
| 866 | |||
| 867 | public static function GetQualityFromNominalBitrate($nominal_bitrate) { |
||
| 886 | } |
||
| 887 | |||
| 888 | |||
| 889 | |||
| 890 | public static function FLACmetaBlockTypeLookup($block_type) { |
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| 891 | |||
| 892 | static $lookup = array ( |
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| 893 | 0 => 'STREAMINFO', |
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| 894 | 1 => 'PADDING', |
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| 895 | 2 => 'APPLICATION', |
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| 896 | 3 => 'SEEKTABLE', |
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| 897 | 4 => 'VORBIS_COMMENT', |
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| 898 | 5 => 'CUESHEET', |
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| 899 | 6 => 'PICTURE' |
||
| 900 | ); |
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| 901 | return (isset($lookup[$block_type]) ? $lookup[$block_type] : 'reserved'); |
||
| 902 | } |
||
| 903 | |||
| 904 | |||
| 905 | |||
| 906 | public static function FLACapplicationIDLookup($application_id) { |
||
| 907 | |||
| 908 | // http://flac.sourceforge.net/id.html |
||
| 909 | |||
| 910 | static $lookup = array ( |
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| 911 | 0x46746F6C => 'flac-tools', // 'Ftol' |
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| 912 | 0x46746F6C => 'Sound Font FLAC', // 'SFFL' |
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| 913 | 0x7065656D => 'Parseable Embedded Extensible Metadata (specification)', // 'peem' |
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| 914 | 0x786D6364 => 'xmcd' |
||
| 915 | |||
| 916 | ); |
||
| 917 | return (isset($lookup[$application_id]) ? $lookup[$application_id] : 'reserved'); |
||
| 918 | } |
||
| 919 | |||
| 920 | |||
| 921 | public static function FLACpictureTypeLookup($type_id) { |
||
| 948 | } |
||
| 949 | |||
| 950 | } |
||
| 951 | |||
| 952 | ?> |
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