ntwb /
wordpress
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_ogg 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_ogg, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class getid3_ogg extends getid3_handler |
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| 20 | { |
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| 21 | // http://xiph.org/vorbis/doc/Vorbis_I_spec.html |
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| 22 | public function Analyze() { |
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| 23 | $info = &$this->getid3->info; |
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| 24 | |||
| 25 | $info['fileformat'] = 'ogg'; |
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| 26 | |||
| 27 | // Warn about illegal tags - only vorbiscomments are allowed |
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| 28 | if (isset($info['id3v2'])) { |
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| 29 | $info['warning'][] = 'Illegal ID3v2 tag present.'; |
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| 30 | } |
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| 31 | if (isset($info['id3v1'])) { |
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| 32 | $info['warning'][] = 'Illegal ID3v1 tag present.'; |
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| 33 | } |
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| 34 | if (isset($info['ape'])) { |
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| 35 | $info['warning'][] = 'Illegal APE tag present.'; |
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| 36 | } |
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| 37 | |||
| 38 | |||
| 39 | // Page 1 - Stream Header |
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| 40 | |||
| 41 | $this->fseek($info['avdataoffset']); |
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| 42 | |||
| 43 | $oggpageinfo = $this->ParseOggPageHeader(); |
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| 44 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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| 45 | |||
| 46 | if ($this->ftell() >= $this->getid3->fread_buffer_size()) { |
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| 47 | $info['error'][] = 'Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)'; |
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| 48 | unset($info['fileformat']); |
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| 49 | unset($info['ogg']); |
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| 50 | return false; |
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| 51 | } |
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| 52 | |||
| 53 | $filedata = $this->fread($oggpageinfo['page_length']); |
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| 54 | $filedataoffset = 0; |
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| 55 | |||
| 56 | if (substr($filedata, 0, 4) == 'fLaC') { |
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| 57 | |||
| 58 | $info['audio']['dataformat'] = 'flac'; |
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| 59 | $info['audio']['bitrate_mode'] = 'vbr'; |
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| 60 | $info['audio']['lossless'] = true; |
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| 61 | |||
| 62 | } elseif (substr($filedata, 1, 6) == 'vorbis') { |
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| 63 | |||
| 64 | $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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| 65 | |||
| 66 | } elseif (substr($filedata, 0, 8) == 'OpusHead') { |
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| 67 | |||
| 68 | if( $this->ParseOpusPageHeader($filedata, $filedataoffset, $oggpageinfo) == false ) { |
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| 69 | return false; |
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| 70 | } |
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| 71 | |||
| 72 | } elseif (substr($filedata, 0, 8) == 'Speex ') { |
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| 73 | |||
| 74 | // http://www.speex.org/manual/node10.html |
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| 75 | |||
| 76 | $info['audio']['dataformat'] = 'speex'; |
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| 77 | $info['mime_type'] = 'audio/speex'; |
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| 78 | $info['audio']['bitrate_mode'] = 'abr'; |
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| 79 | $info['audio']['lossless'] = false; |
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| 80 | |||
| 81 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' |
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| 82 | $filedataoffset += 8; |
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| 83 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); |
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| 84 | $filedataoffset += 20; |
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| 85 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 86 | $filedataoffset += 4; |
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| 87 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 88 | $filedataoffset += 4; |
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| 89 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 90 | $filedataoffset += 4; |
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| 91 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 92 | $filedataoffset += 4; |
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| 93 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 94 | $filedataoffset += 4; |
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| 95 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 96 | $filedataoffset += 4; |
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| 97 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 98 | $filedataoffset += 4; |
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| 99 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 100 | $filedataoffset += 4; |
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| 101 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 102 | $filedataoffset += 4; |
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| 103 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 104 | $filedataoffset += 4; |
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| 105 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 106 | $filedataoffset += 4; |
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| 107 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 108 | $filedataoffset += 4; |
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| 109 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 110 | $filedataoffset += 4; |
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| 111 | |||
| 112 | $info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); |
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| 113 | $info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; |
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| 114 | $info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; |
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| 115 | $info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; |
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| 116 | $info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); |
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| 117 | |||
| 118 | $info['audio']['sample_rate'] = $info['speex']['sample_rate']; |
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| 119 | $info['audio']['channels'] = $info['speex']['channels']; |
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| 120 | if ($info['speex']['vbr']) { |
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| 121 | $info['audio']['bitrate_mode'] = 'vbr'; |
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| 122 | } |
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| 123 | |||
| 124 | } elseif (substr($filedata, 0, 7) == "\x80".'theora') { |
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| 125 | |||
| 126 | // http://www.theora.org/doc/Theora.pdf (section 6.2) |
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| 127 | |||
| 128 | $info['ogg']['pageheader']['theora']['theora_magic'] = substr($filedata, $filedataoffset, 7); // hard-coded to "\x80.'theora' |
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| 129 | $filedataoffset += 7; |
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| 130 | $info['ogg']['pageheader']['theora']['version_major'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 131 | $filedataoffset += 1; |
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| 132 | $info['ogg']['pageheader']['theora']['version_minor'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 133 | $filedataoffset += 1; |
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| 134 | $info['ogg']['pageheader']['theora']['version_revision'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 135 | $filedataoffset += 1; |
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| 136 | $info['ogg']['pageheader']['theora']['frame_width_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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| 137 | $filedataoffset += 2; |
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| 138 | $info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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| 139 | $filedataoffset += 2; |
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| 140 | $info['ogg']['pageheader']['theora']['resolution_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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| 141 | $filedataoffset += 3; |
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| 142 | $info['ogg']['pageheader']['theora']['resolution_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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| 143 | $filedataoffset += 3; |
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| 144 | $info['ogg']['pageheader']['theora']['picture_offset_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 145 | $filedataoffset += 1; |
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| 146 | $info['ogg']['pageheader']['theora']['picture_offset_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 147 | $filedataoffset += 1; |
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| 148 | $info['ogg']['pageheader']['theora']['frame_rate_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 149 | $filedataoffset += 4; |
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| 150 | $info['ogg']['pageheader']['theora']['frame_rate_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 151 | $filedataoffset += 4; |
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| 152 | $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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| 153 | $filedataoffset += 3; |
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| 154 | $info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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| 155 | $filedataoffset += 3; |
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| 156 | $info['ogg']['pageheader']['theora']['color_space_id'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 157 | $filedataoffset += 1; |
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| 158 | $info['ogg']['pageheader']['theora']['nominal_bitrate'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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| 159 | $filedataoffset += 3; |
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| 160 | $info['ogg']['pageheader']['theora']['flags'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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| 161 | $filedataoffset += 2; |
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| 162 | |||
| 163 | $info['ogg']['pageheader']['theora']['quality'] = ($info['ogg']['pageheader']['theora']['flags'] & 0xFC00) >> 10; |
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| 164 | $info['ogg']['pageheader']['theora']['kfg_shift'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x03E0) >> 5; |
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| 165 | $info['ogg']['pageheader']['theora']['pixel_format_id'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0018) >> 3; |
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| 166 | $info['ogg']['pageheader']['theora']['reserved'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0007) >> 0; // should be 0 |
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| 167 | $info['ogg']['pageheader']['theora']['color_space'] = self::TheoraColorSpace($info['ogg']['pageheader']['theora']['color_space_id']); |
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| 168 | $info['ogg']['pageheader']['theora']['pixel_format'] = self::TheoraPixelFormat($info['ogg']['pageheader']['theora']['pixel_format_id']); |
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| 169 | |||
| 170 | $info['video']['dataformat'] = 'theora'; |
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| 171 | $info['mime_type'] = 'video/ogg'; |
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| 172 | //$info['audio']['bitrate_mode'] = 'abr'; |
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| 173 | //$info['audio']['lossless'] = false; |
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| 174 | $info['video']['resolution_x'] = $info['ogg']['pageheader']['theora']['resolution_x']; |
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| 175 | $info['video']['resolution_y'] = $info['ogg']['pageheader']['theora']['resolution_y']; |
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| 176 | if ($info['ogg']['pageheader']['theora']['frame_rate_denominator'] > 0) { |
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| 177 | $info['video']['frame_rate'] = (float) $info['ogg']['pageheader']['theora']['frame_rate_numerator'] / $info['ogg']['pageheader']['theora']['frame_rate_denominator']; |
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| 178 | } |
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| 179 | if ($info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] > 0) { |
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| 180 | $info['video']['pixel_aspect_ratio'] = (float) $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] / $info['ogg']['pageheader']['theora']['pixel_aspect_denominator']; |
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| 181 | } |
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| 182 | $info['warning'][] = 'Ogg Theora (v3) not fully supported in this version of getID3 ['.$this->getid3->version().'] -- bitrate, playtime and all audio data are currently unavailable'; |
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| 183 | |||
| 184 | |||
| 185 | } elseif (substr($filedata, 0, 8) == "fishead\x00") { |
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| 186 | |||
| 187 | // Ogg Skeleton version 3.0 Format Specification |
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| 188 | // http://xiph.org/ogg/doc/skeleton.html |
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| 189 | $filedataoffset += 8; |
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| 190 | $info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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| 191 | $filedataoffset += 2; |
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| 192 | $info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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| 193 | $filedataoffset += 2; |
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| 194 | $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 195 | $filedataoffset += 8; |
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| 196 | $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 197 | $filedataoffset += 8; |
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| 198 | $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 199 | $filedataoffset += 8; |
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| 200 | $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 201 | $filedataoffset += 8; |
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| 202 | $info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20)); |
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| 203 | $filedataoffset += 20; |
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| 204 | |||
| 205 | $info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor']; |
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| 206 | $info['ogg']['skeleton']['fishead']['presentationtime'] = $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator']; |
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| 207 | $info['ogg']['skeleton']['fishead']['basetime'] = $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']; |
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| 208 | $info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc']; |
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| 209 | |||
| 210 | |||
| 211 | $counter = 0; |
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| 212 | do { |
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| 213 | $oggpageinfo = $this->ParseOggPageHeader(); |
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| 214 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo; |
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| 215 | $filedata = $this->fread($oggpageinfo['page_length']); |
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| 216 | $this->fseek($oggpageinfo['page_end_offset']); |
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| 217 | |||
| 218 | if (substr($filedata, 0, 8) == "fisbone\x00") { |
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| 219 | |||
| 220 | $filedataoffset = 8; |
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| 221 | $info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 222 | $filedataoffset += 4; |
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| 223 | $info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 224 | $filedataoffset += 4; |
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| 225 | $info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 226 | $filedataoffset += 4; |
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| 227 | $info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 228 | $filedataoffset += 8; |
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| 229 | $info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 230 | $filedataoffset += 8; |
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| 231 | $info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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| 232 | $filedataoffset += 8; |
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| 233 | $info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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| 234 | $filedataoffset += 4; |
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| 235 | $info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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| 236 | $filedataoffset += 1; |
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| 237 | $info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3); |
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| 238 | $filedataoffset += 3; |
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| 239 | |||
| 240 | } elseif (substr($filedata, 1, 6) == 'theora') { |
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| 241 | |||
| 242 | $info['video']['dataformat'] = 'theora1'; |
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| 243 | $info['error'][] = 'Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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| 244 | //break; |
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| 245 | |||
| 246 | } elseif (substr($filedata, 1, 6) == 'vorbis') { |
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| 247 | |||
| 248 | $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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| 249 | |||
| 250 | } else { |
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| 251 | $info['error'][] = 'unexpected'; |
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| 252 | //break; |
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| 253 | } |
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| 254 | //} while ($oggpageinfo['page_seqno'] == 0); |
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| 255 | } while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00")); |
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| 256 | |||
| 257 | $this->fseek($oggpageinfo['page_start_offset']); |
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| 258 | |||
| 259 | $info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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| 260 | //return false; |
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| 261 | |||
| 262 | } else { |
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| 263 | |||
| 264 | $info['error'][] = 'Expecting either "Speex ", "OpusHead" or "vorbis" identifier strings, found "'.substr($filedata, 0, 8).'"'; |
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| 265 | unset($info['ogg']); |
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| 266 | unset($info['mime_type']); |
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| 267 | return false; |
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| 268 | |||
| 269 | } |
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| 270 | |||
| 271 | // Page 2 - Comment Header |
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| 272 | $oggpageinfo = $this->ParseOggPageHeader(); |
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| 273 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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| 274 | |||
| 275 | switch ($info['audio']['dataformat']) { |
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| 276 | case 'vorbis': |
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| 277 | $filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
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| 278 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); |
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| 279 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' |
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| 280 | |||
| 281 | $this->ParseVorbisComments(); |
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| 282 | break; |
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| 283 | |||
| 284 | case 'flac': |
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| 285 | $flac = new getid3_flac($this->getid3); |
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| 286 | if (!$flac->parseMETAdata()) { |
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| 287 | $info['error'][] = 'Failed to parse FLAC headers'; |
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| 288 | return false; |
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| 289 | } |
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| 290 | unset($flac); |
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| 291 | break; |
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| 292 | |||
| 293 | case 'speex': |
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| 294 | $this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); |
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| 295 | $this->ParseVorbisComments(); |
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| 296 | break; |
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| 297 | |||
| 298 | case 'opus': |
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| 299 | $filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
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| 300 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 0, 8); // hard-coded to 'OpusTags' |
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| 301 | if(substr($filedata, 0, 8) != 'OpusTags') { |
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| 302 | $info['error'][] = 'Expected "OpusTags" as header but got "'.substr($filedata, 0, 8).'"'; |
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| 303 | return false; |
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| 304 | } |
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| 305 | |||
| 306 | $this->ParseVorbisComments(); |
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| 307 | break; |
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| 308 | |||
| 309 | } |
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| 310 | |||
| 311 | // Last Page - Number of Samples |
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| 312 | if (!getid3_lib::intValueSupported($info['avdataend'])) { |
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| 313 | |||
| 314 | $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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| 315 | |||
| 316 | } else { |
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| 317 | |||
| 318 | $this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0)); |
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| 319 | $LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size())); |
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| 320 | if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { |
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| 321 | $this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO'))); |
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| 322 | $info['avdataend'] = $this->ftell(); |
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| 323 | $info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader(); |
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| 324 | $info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position']; |
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| 325 | if ($info['ogg']['samples'] == 0) { |
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| 326 | $info['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; |
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| 327 | return false; |
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| 328 | } |
||
| 329 | if (!empty($info['audio']['sample_rate'])) { |
||
| 330 | $info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / ($info['ogg']['samples'] / $info['audio']['sample_rate']); |
||
| 331 | } |
||
| 332 | } |
||
| 333 | |||
| 334 | } |
||
| 335 | |||
| 336 | if (!empty($info['ogg']['bitrate_average'])) { |
||
| 337 | $info['audio']['bitrate'] = $info['ogg']['bitrate_average']; |
||
| 338 | } elseif (!empty($info['ogg']['bitrate_nominal'])) { |
||
| 339 | $info['audio']['bitrate'] = $info['ogg']['bitrate_nominal']; |
||
| 340 | } elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) { |
||
| 341 | $info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2; |
||
| 342 | } |
||
| 343 | if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) { |
||
| 344 | if ($info['audio']['bitrate'] == 0) { |
||
| 345 | $info['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; |
||
| 346 | return false; |
||
| 347 | } |
||
| 348 | $info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']); |
||
| 349 | } |
||
| 350 | |||
| 351 | if (isset($info['ogg']['vendor'])) { |
||
| 352 | $info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']); |
||
| 353 | |||
| 354 | // Vorbis only |
||
| 355 | if ($info['audio']['dataformat'] == 'vorbis') { |
||
| 356 | |||
| 357 | // Vorbis 1.0 starts with Xiph.Org |
||
| 358 | if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) { |
||
| 359 | |||
| 360 | if ($info['audio']['bitrate_mode'] == 'abr') { |
||
| 361 | |||
| 362 | // Set -b 128 on abr files |
||
| 363 | $info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000); |
||
| 364 | |||
| 365 | } elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) { |
||
| 366 | // Set -q N on vbr files |
||
| 367 | $info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']); |
||
| 368 | |||
| 369 | } |
||
| 370 | } |
||
| 371 | |||
| 372 | if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) { |
||
| 373 | $info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps'; |
||
| 374 | } |
||
| 375 | } |
||
| 376 | } |
||
| 377 | |||
| 378 | return true; |
||
| 379 | } |
||
| 380 | |||
| 381 | public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) { |
||
| 382 | $info = &$this->getid3->info; |
||
| 383 | $info['audio']['dataformat'] = 'vorbis'; |
||
| 384 | $info['audio']['lossless'] = false; |
||
| 385 | |||
| 386 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 387 | $filedataoffset += 1; |
||
| 388 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' |
||
| 389 | $filedataoffset += 6; |
||
| 390 | $info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 391 | $filedataoffset += 4; |
||
| 392 | $info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 393 | $filedataoffset += 1; |
||
| 394 | $info['audio']['channels'] = $info['ogg']['numberofchannels']; |
||
| 395 | $info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 396 | $filedataoffset += 4; |
||
| 397 | if ($info['ogg']['samplerate'] == 0) { |
||
| 398 | $info['error'][] = 'Corrupt Ogg file: sample rate == zero'; |
||
| 399 | return false; |
||
| 400 | } |
||
| 401 | $info['audio']['sample_rate'] = $info['ogg']['samplerate']; |
||
| 402 | $info['ogg']['samples'] = 0; // filled in later |
||
| 403 | $info['ogg']['bitrate_average'] = 0; // filled in later |
||
| 404 | $info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 405 | $filedataoffset += 4; |
||
| 406 | $info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 407 | $filedataoffset += 4; |
||
| 408 | $info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 409 | $filedataoffset += 4; |
||
| 410 | $info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); |
||
| 411 | $info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); |
||
| 412 | $info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet |
||
| 413 | |||
| 414 | $info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr |
||
| 415 | if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) { |
||
| 416 | unset($info['ogg']['bitrate_max']); |
||
| 417 | $info['audio']['bitrate_mode'] = 'abr'; |
||
| 418 | } |
||
| 419 | if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { |
||
| 420 | unset($info['ogg']['bitrate_nominal']); |
||
| 421 | } |
||
| 422 | if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) { |
||
| 423 | unset($info['ogg']['bitrate_min']); |
||
| 424 | $info['audio']['bitrate_mode'] = 'abr'; |
||
| 425 | } |
||
| 426 | return true; |
||
| 427 | } |
||
| 428 | |||
| 429 | // http://tools.ietf.org/html/draft-ietf-codec-oggopus-03 |
||
| 430 | public function ParseOpusPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) { |
||
| 431 | $info = &$this->getid3->info; |
||
| 432 | $info['audio']['dataformat'] = 'opus'; |
||
| 433 | $info['mime_type'] = 'audio/ogg; codecs=opus'; |
||
| 434 | |||
| 435 | /** @todo find a usable way to detect abr (vbr that is padded to be abr) */ |
||
| 436 | $info['audio']['bitrate_mode'] = 'vbr'; |
||
| 437 | |||
| 438 | $info['audio']['lossless'] = false; |
||
| 439 | |||
| 440 | $info['ogg']['pageheader']['opus']['opus_magic'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'OpusHead' |
||
| 441 | $filedataoffset += 8; |
||
| 442 | $info['ogg']['pageheader']['opus']['version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 443 | $filedataoffset += 1; |
||
| 444 | |||
| 445 | if ($info['ogg']['pageheader']['opus']['version'] < 1 || $info['ogg']['pageheader']['opus']['version'] > 15) { |
||
| 446 | $info['error'][] = 'Unknown opus version number (only accepting 1-15)'; |
||
| 447 | return false; |
||
| 448 | } |
||
| 449 | |||
| 450 | $info['ogg']['pageheader']['opus']['out_channel_count'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 451 | $filedataoffset += 1; |
||
| 452 | |||
| 453 | if ($info['ogg']['pageheader']['opus']['out_channel_count'] == 0) { |
||
| 454 | $info['error'][] = 'Invalid channel count in opus header (must not be zero)'; |
||
| 455 | return false; |
||
| 456 | } |
||
| 457 | |||
| 458 | $info['ogg']['pageheader']['opus']['pre_skip'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
||
| 459 | $filedataoffset += 2; |
||
| 460 | |||
| 461 | $info['ogg']['pageheader']['opus']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 462 | $filedataoffset += 4; |
||
| 463 | |||
| 464 | //$info['ogg']['pageheader']['opus']['output_gain'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
||
| 465 | //$filedataoffset += 2; |
||
| 466 | |||
| 467 | //$info['ogg']['pageheader']['opus']['channel_mapping_family'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 468 | //$filedataoffset += 1; |
||
| 469 | |||
| 470 | $info['opus']['opus_version'] = $info['ogg']['pageheader']['opus']['version']; |
||
| 471 | $info['opus']['sample_rate'] = $info['ogg']['pageheader']['opus']['sample_rate']; |
||
| 472 | $info['opus']['out_channel_count'] = $info['ogg']['pageheader']['opus']['out_channel_count']; |
||
| 473 | |||
| 474 | $info['audio']['channels'] = $info['opus']['out_channel_count']; |
||
| 475 | $info['audio']['sample_rate'] = $info['opus']['sample_rate']; |
||
| 476 | return true; |
||
| 477 | } |
||
| 478 | |||
| 479 | |||
| 480 | public function ParseOggPageHeader() { |
||
| 481 | // http://xiph.org/ogg/vorbis/doc/framing.html |
||
| 482 | $oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file |
||
| 483 | |||
| 484 | $filedata = $this->fread($this->getid3->fread_buffer_size()); |
||
| 485 | $filedataoffset = 0; |
||
| 486 | while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { |
||
| 487 | if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) { |
||
| 488 | // should be found before here |
||
| 489 | return false; |
||
| 490 | } |
||
| 491 | if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { |
||
| 492 | if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) { |
||
| 493 | // get some more data, unless eof, in which case fail |
||
| 494 | return false; |
||
| 495 | } |
||
| 496 | } |
||
| 497 | } |
||
| 498 | $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' |
||
| 499 | |||
| 500 | $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 501 | $filedataoffset += 1; |
||
| 502 | $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 503 | $filedataoffset += 1; |
||
| 504 | $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet |
||
| 505 | $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) |
||
| 506 | $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos) |
||
| 507 | |||
| 508 | $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
||
| 509 | $filedataoffset += 8; |
||
| 510 | $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 511 | $filedataoffset += 4; |
||
| 512 | $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 513 | $filedataoffset += 4; |
||
| 514 | $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
||
| 515 | $filedataoffset += 4; |
||
| 516 | $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 517 | $filedataoffset += 1; |
||
| 518 | $oggheader['page_length'] = 0; |
||
| 519 | for ($i = 0; $i < $oggheader['page_segments']; $i++) { |
||
| 520 | $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
||
| 521 | $filedataoffset += 1; |
||
| 522 | $oggheader['page_length'] += $oggheader['segment_table'][$i]; |
||
| 523 | } |
||
| 524 | $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset; |
||
| 525 | $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length']; |
||
| 526 | $this->fseek($oggheader['header_end_offset']); |
||
| 527 | |||
| 528 | return $oggheader; |
||
| 529 | } |
||
| 530 | |||
| 531 | // http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005 |
||
| 532 | public function ParseVorbisComments() { |
||
| 533 | $info = &$this->getid3->info; |
||
| 534 | |||
| 535 | $OriginalOffset = $this->ftell(); |
||
| 536 | $commentdataoffset = 0; |
||
| 537 | $VorbisCommentPage = 1; |
||
| 538 | |||
| 539 | switch ($info['audio']['dataformat']) { |
||
| 540 | case 'vorbis': |
||
| 541 | case 'speex': |
||
| 542 | case 'opus': |
||
| 543 | $CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block |
||
| 544 | $this->fseek($CommentStartOffset); |
||
| 545 | $commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; |
||
| 546 | $commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); |
||
| 547 | |||
| 548 | if ($info['audio']['dataformat'] == 'vorbis') { |
||
| 549 | $commentdataoffset += (strlen('vorbis') + 1); |
||
| 550 | } |
||
| 551 | else if ($info['audio']['dataformat'] == 'opus') { |
||
| 552 | $commentdataoffset += strlen('OpusTags'); |
||
| 553 | } |
||
| 554 | |||
| 555 | break; |
||
| 556 | |||
| 557 | case 'flac': |
||
| 558 | $CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4; |
||
| 559 | $this->fseek($CommentStartOffset); |
||
| 560 | $commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']); |
||
| 561 | break; |
||
| 562 | |||
| 563 | default: |
||
| 564 | return false; |
||
| 565 | } |
||
| 566 | |||
| 567 | $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
||
| 568 | $commentdataoffset += 4; |
||
| 569 | |||
| 570 | $info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); |
||
| 571 | $commentdataoffset += $VendorSize; |
||
| 572 | |||
| 573 | $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
||
| 574 | $commentdataoffset += 4; |
||
| 575 | $info['avdataoffset'] = $CommentStartOffset + $commentdataoffset; |
||
| 576 | |||
| 577 | $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); |
||
| 578 | $ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw']; |
||
| 579 | for ($i = 0; $i < $CommentsCount; $i++) { |
||
| 580 | |||
| 581 | if ($i >= 10000) { |
||
| 582 | // https://github.com/owncloud/music/issues/212#issuecomment-43082336 |
||
| 583 | $info['warning'][] = 'Unexpectedly large number ('.$CommentsCount.') of Ogg comments - breaking after reading '.$i.' comments'; |
||
| 584 | break; |
||
| 585 | } |
||
| 586 | |||
| 587 | $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; |
||
| 588 | |||
| 589 | if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) { |
||
| 590 | if ($oggpageinfo = $this->ParseOggPageHeader()) { |
||
| 591 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
||
| 592 | |||
| 593 | $VorbisCommentPage++; |
||
| 594 | |||
| 595 | // First, save what we haven't read yet |
||
| 596 | $AsYetUnusedData = substr($commentdata, $commentdataoffset); |
||
| 597 | |||
| 598 | // Then take that data off the end |
||
| 599 | $commentdata = substr($commentdata, 0, $commentdataoffset); |
||
| 600 | |||
| 601 | // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
||
| 602 | $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
||
| 603 | $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
||
| 604 | |||
| 605 | // Finally, stick the unused data back on the end |
||
| 606 | $commentdata .= $AsYetUnusedData; |
||
| 607 | |||
| 608 | //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
||
| 609 | $commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1)); |
||
| 610 | } |
||
| 611 | |||
| 612 | } |
||
| 613 | $ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
||
| 614 | |||
| 615 | // replace avdataoffset with position just after the last vorbiscomment |
||
| 616 | $info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4; |
||
| 617 | |||
| 618 | $commentdataoffset += 4; |
||
| 619 | while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) { |
||
| 620 | if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) { |
||
| 621 | $info['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments'; |
||
| 622 | break 2; |
||
| 623 | } |
||
| 624 | |||
| 625 | $VorbisCommentPage++; |
||
| 626 | |||
| 627 | $oggpageinfo = $this->ParseOggPageHeader(); |
||
| 628 | $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
||
| 629 | |||
| 630 | // First, save what we haven't read yet |
||
| 631 | $AsYetUnusedData = substr($commentdata, $commentdataoffset); |
||
| 632 | |||
| 633 | // Then take that data off the end |
||
| 634 | $commentdata = substr($commentdata, 0, $commentdataoffset); |
||
| 635 | |||
| 636 | // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
||
| 637 | $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
||
| 638 | $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
||
| 639 | |||
| 640 | // Finally, stick the unused data back on the end |
||
| 641 | $commentdata .= $AsYetUnusedData; |
||
| 642 | |||
| 643 | //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
||
| 644 | if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) { |
||
| 645 | $info['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
||
| 646 | break; |
||
| 647 | } |
||
| 648 | $readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1); |
||
| 649 | if ($readlength <= 0) { |
||
| 650 | $info['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
||
| 651 | break; |
||
| 652 | } |
||
| 653 | $commentdata .= $this->fread($readlength); |
||
| 654 | |||
| 655 | //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; |
||
| 656 | } |
||
| 657 | $ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset; |
||
| 658 | $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']); |
||
| 659 | $commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size']; |
||
| 660 | |||
| 661 | if (!$commentstring) { |
||
| 662 | |||
| 663 | // no comment? |
||
| 664 | $info['warning'][] = 'Blank Ogg comment ['.$i.']'; |
||
| 665 | |||
| 666 | } elseif (strstr($commentstring, '=')) { |
||
| 667 | |||
| 668 | $commentexploded = explode('=', $commentstring, 2); |
||
| 669 | $ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]); |
||
| 670 | $ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : ''); |
||
| 671 | |||
| 672 | if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') { |
||
| 673 | |||
| 674 | // http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE |
||
| 675 | // 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. |
||
| 676 | // http://flac.sourceforge.net/format.html#metadata_block_picture |
||
| 677 | $flac = new getid3_flac($this->getid3); |
||
| 678 | $flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value'])); |
||
| 679 | $flac->parsePICTURE(); |
||
| 680 | $info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0]; |
||
| 681 | unset($flac); |
||
| 682 | |||
| 683 | } elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') { |
||
| 684 | |||
| 685 | $data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']); |
||
| 686 | $this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure'); |
||
| 687 | /** @todo use 'coverartmime' where available */ |
||
| 688 | $imageinfo = getid3_lib::GetDataImageSize($data); |
||
| 689 | if ($imageinfo === false || !isset($imageinfo['mime'])) { |
||
| 690 | $this->warning('COVERART vorbiscomment tag contains invalid image'); |
||
| 691 | continue; |
||
| 692 | } |
||
| 693 | |||
| 694 | $ogg = new self($this->getid3); |
||
| 695 | $ogg->setStringMode($data); |
||
| 696 | $info['ogg']['comments']['picture'][] = array( |
||
| 697 | 'image_mime' => $imageinfo['mime'], |
||
| 698 | 'datalength' => strlen($data), |
||
| 699 | 'picturetype' => 'cover art', |
||
| 700 | 'image_height' => $imageinfo['height'], |
||
| 701 | 'image_width' => $imageinfo['width'], |
||
| 702 | 'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']), |
||
| 703 | ); |
||
| 704 | unset($ogg); |
||
| 705 | |||
| 706 | } else { |
||
| 707 | |||
| 708 | $info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value']; |
||
| 709 | |||
| 710 | } |
||
| 711 | |||
| 712 | } else { |
||
| 713 | |||
| 714 | $info['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; |
||
| 715 | |||
| 716 | } |
||
| 717 | unset($ThisFileInfo_ogg_comments_raw[$i]); |
||
| 718 | } |
||
| 719 | unset($ThisFileInfo_ogg_comments_raw); |
||
| 720 | |||
| 721 | |||
| 722 | // Replay Gain Adjustment |
||
| 723 | // http://privatewww.essex.ac.uk/~djmrob/replaygain/ |
||
| 724 | if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) { |
||
| 725 | foreach ($info['ogg']['comments'] as $index => $commentvalue) { |
||
| 726 | switch ($index) { |
||
| 727 | case 'rg_audiophile': |
||
| 728 | case 'replaygain_album_gain': |
||
| 729 | $info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0]; |
||
| 730 | unset($info['ogg']['comments'][$index]); |
||
| 731 | break; |
||
| 732 | |||
| 733 | case 'rg_radio': |
||
| 734 | case 'replaygain_track_gain': |
||
| 735 | $info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0]; |
||
| 736 | unset($info['ogg']['comments'][$index]); |
||
| 737 | break; |
||
| 738 | |||
| 739 | case 'replaygain_album_peak': |
||
| 740 | $info['replay_gain']['album']['peak'] = (double) $commentvalue[0]; |
||
| 741 | unset($info['ogg']['comments'][$index]); |
||
| 742 | break; |
||
| 743 | |||
| 744 | case 'rg_peak': |
||
| 745 | case 'replaygain_track_peak': |
||
| 746 | $info['replay_gain']['track']['peak'] = (double) $commentvalue[0]; |
||
| 747 | unset($info['ogg']['comments'][$index]); |
||
| 748 | break; |
||
| 749 | |||
| 750 | case 'replaygain_reference_loudness': |
||
| 751 | $info['replay_gain']['reference_volume'] = (double) $commentvalue[0]; |
||
| 752 | unset($info['ogg']['comments'][$index]); |
||
| 753 | break; |
||
| 754 | |||
| 755 | default: |
||
| 756 | // do nothing |
||
| 757 | break; |
||
| 758 | } |
||
| 759 | } |
||
| 760 | } |
||
| 761 | |||
| 762 | $this->fseek($OriginalOffset); |
||
| 763 | |||
| 764 | return true; |
||
| 765 | } |
||
| 766 | |||
| 767 | public static function SpeexBandModeLookup($mode) { |
||
| 768 | static $SpeexBandModeLookup = array(); |
||
| 769 | if (empty($SpeexBandModeLookup)) { |
||
| 770 | $SpeexBandModeLookup[0] = 'narrow'; |
||
| 771 | $SpeexBandModeLookup[1] = 'wide'; |
||
| 772 | $SpeexBandModeLookup[2] = 'ultra-wide'; |
||
| 773 | } |
||
| 774 | return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); |
||
| 775 | } |
||
| 776 | |||
| 777 | |||
| 778 | public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) { |
||
| 779 | for ($i = 0; $i < $SegmentNumber; $i++) { |
||
| 780 | $segmentlength = 0; |
||
| 781 | foreach ($OggInfoArray['segment_table'] as $key => $value) { |
||
| 782 | $segmentlength += $value; |
||
| 783 | if ($value < 255) { |
||
| 784 | break; |
||
| 785 | } |
||
| 786 | } |
||
| 787 | } |
||
| 788 | return $segmentlength; |
||
| 789 | } |
||
| 790 | |||
| 791 | |||
| 792 | public static function get_quality_from_nominal_bitrate($nominal_bitrate) { |
||
| 793 | |||
| 794 | // decrease precision |
||
| 795 | $nominal_bitrate = $nominal_bitrate / 1000; |
||
| 796 | |||
| 797 | if ($nominal_bitrate < 128) { |
||
| 798 | // q-1 to q4 |
||
| 799 | $qval = ($nominal_bitrate - 64) / 16; |
||
| 800 | } elseif ($nominal_bitrate < 256) { |
||
| 801 | // q4 to q8 |
||
| 802 | $qval = $nominal_bitrate / 32; |
||
| 803 | } elseif ($nominal_bitrate < 320) { |
||
| 804 | // q8 to q9 |
||
| 805 | $qval = ($nominal_bitrate + 256) / 64; |
||
| 806 | } else { |
||
| 807 | // q9 to q10 |
||
| 808 | $qval = ($nominal_bitrate + 1300) / 180; |
||
| 809 | } |
||
| 810 | //return $qval; // 5.031324 |
||
| 811 | //return intval($qval); // 5 |
||
| 812 | return round($qval, 1); // 5 or 4.9 |
||
| 813 | } |
||
| 814 | |||
| 815 | public static function TheoraColorSpace($colorspace_id) { |
||
| 816 | // http://www.theora.org/doc/Theora.pdf (table 6.3) |
||
| 817 | static $TheoraColorSpaceLookup = array(); |
||
| 818 | if (empty($TheoraColorSpaceLookup)) { |
||
| 819 | $TheoraColorSpaceLookup[0] = 'Undefined'; |
||
| 820 | $TheoraColorSpaceLookup[1] = 'Rec. 470M'; |
||
| 821 | $TheoraColorSpaceLookup[2] = 'Rec. 470BG'; |
||
| 822 | $TheoraColorSpaceLookup[3] = 'Reserved'; |
||
| 823 | } |
||
| 824 | return (isset($TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null); |
||
| 825 | } |
||
| 826 | |||
| 827 | public static function TheoraPixelFormat($pixelformat_id) { |
||
| 828 | // http://www.theora.org/doc/Theora.pdf (table 6.4) |
||
| 829 | static $TheoraPixelFormatLookup = array(); |
||
| 830 | if (empty($TheoraPixelFormatLookup)) { |
||
| 831 | $TheoraPixelFormatLookup[0] = '4:2:0'; |
||
| 832 | $TheoraPixelFormatLookup[1] = 'Reserved'; |
||
| 833 | $TheoraPixelFormatLookup[2] = '4:2:2'; |
||
| 834 | $TheoraPixelFormatLookup[3] = '4:4:4'; |
||
| 835 | } |
||
| 836 | return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null); |
||
| 837 | } |
||
| 838 | |||
| 839 | } |
||
| 840 |
