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<?php |
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///////////////////////////////////////////////////////////////// |
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/// getID3() by James Heinrich <info@getid3.org> // |
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// available at http://getid3.sourceforge.net // |
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// or http://www.getid3.org // |
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// also https://github.com/JamesHeinrich/getID3 // |
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///////////////////////////////////////////////////////////////// |
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// See readme.txt for more details // |
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///////////////////////////////////////////////////////////////// |
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// // |
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// module.audio.ogg.php // |
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// module for analyzing Ogg Vorbis, OggFLAC and Speex files // |
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// dependencies: module.audio.flac.php // |
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// /// |
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///////////////////////////////////////////////////////////////// |
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true); |
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class getid3_ogg extends getid3_handler |
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{ |
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// http://xiph.org/vorbis/doc/Vorbis_I_spec.html |
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public function Analyze() { |
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$info = &$this->getid3->info; |
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$info['fileformat'] = 'ogg'; |
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// Warn about illegal tags - only vorbiscomments are allowed |
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if (isset($info['id3v2'])) { |
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$info['warning'][] = 'Illegal ID3v2 tag present.'; |
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} |
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if (isset($info['id3v1'])) { |
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$info['warning'][] = 'Illegal ID3v1 tag present.'; |
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} |
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if (isset($info['ape'])) { |
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$info['warning'][] = 'Illegal APE tag present.'; |
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} |
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// Page 1 - Stream Header |
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$this->fseek($info['avdataoffset']); |
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$oggpageinfo = $this->ParseOggPageHeader(); |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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if ($this->ftell() >= $this->getid3->fread_buffer_size()) { |
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$info['error'][] = 'Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)'; |
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unset($info['fileformat']); |
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unset($info['ogg']); |
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return false; |
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} |
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$filedata = $this->fread($oggpageinfo['page_length']); |
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$filedataoffset = 0; |
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if (substr($filedata, 0, 4) == 'fLaC') { |
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$info['audio']['dataformat'] = 'flac'; |
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$info['audio']['bitrate_mode'] = 'vbr'; |
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$info['audio']['lossless'] = true; |
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} elseif (substr($filedata, 1, 6) == 'vorbis') { |
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$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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} elseif (substr($filedata, 0, 8) == 'Speex ') { |
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// http://www.speex.org/manual/node10.html |
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$info['audio']['dataformat'] = 'speex'; |
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$info['mime_type'] = 'audio/speex'; |
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$info['audio']['bitrate_mode'] = 'abr'; |
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$info['audio']['lossless'] = false; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' |
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$filedataoffset += 8; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); |
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$filedataoffset += 20; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); |
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$info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; |
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$info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; |
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$info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; |
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$info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); |
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$info['audio']['sample_rate'] = $info['speex']['sample_rate']; |
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$info['audio']['channels'] = $info['speex']['channels']; |
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if ($info['speex']['vbr']) { |
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$info['audio']['bitrate_mode'] = 'vbr'; |
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} |
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} elseif (substr($filedata, 0, 7) == "\x80".'theora') { |
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// http://www.theora.org/doc/Theora.pdf (section 6.2) |
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$info['ogg']['pageheader']['theora']['theora_magic'] = substr($filedata, $filedataoffset, 7); // hard-coded to "\x80.'theora' |
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$filedataoffset += 7; |
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$info['ogg']['pageheader']['theora']['version_major'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['version_minor'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['version_revision'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['frame_width_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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$filedataoffset += 2; |
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$info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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$filedataoffset += 2; |
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$info['ogg']['pageheader']['theora']['resolution_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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$filedataoffset += 3; |
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$info['ogg']['pageheader']['theora']['resolution_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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$filedataoffset += 3; |
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$info['ogg']['pageheader']['theora']['picture_offset_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['picture_offset_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['frame_rate_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader']['theora']['frame_rate_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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$filedataoffset += 3; |
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$info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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$filedataoffset += 3; |
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$info['ogg']['pageheader']['theora']['color_space_id'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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$info['ogg']['pageheader']['theora']['nominal_bitrate'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); |
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$filedataoffset += 3; |
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$info['ogg']['pageheader']['theora']['flags'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); |
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$filedataoffset += 2; |
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$info['ogg']['pageheader']['theora']['quality'] = ($info['ogg']['pageheader']['theora']['flags'] & 0xFC00) >> 10; |
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$info['ogg']['pageheader']['theora']['kfg_shift'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x03E0) >> 5; |
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$info['ogg']['pageheader']['theora']['pixel_format_id'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0018) >> 3; |
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$info['ogg']['pageheader']['theora']['reserved'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0007) >> 0; // should be 0 |
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$info['ogg']['pageheader']['theora']['color_space'] = self::TheoraColorSpace($info['ogg']['pageheader']['theora']['color_space_id']); |
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$info['ogg']['pageheader']['theora']['pixel_format'] = self::TheoraPixelFormat($info['ogg']['pageheader']['theora']['pixel_format_id']); |
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$info['video']['dataformat'] = 'theora'; |
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$info['mime_type'] = 'video/ogg'; |
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//$info['audio']['bitrate_mode'] = 'abr'; |
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//$info['audio']['lossless'] = false; |
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$info['video']['resolution_x'] = $info['ogg']['pageheader']['theora']['resolution_x']; |
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$info['video']['resolution_y'] = $info['ogg']['pageheader']['theora']['resolution_y']; |
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if ($info['ogg']['pageheader']['theora']['frame_rate_denominator'] > 0) { |
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$info['video']['frame_rate'] = (float) $info['ogg']['pageheader']['theora']['frame_rate_numerator'] / $info['ogg']['pageheader']['theora']['frame_rate_denominator']; |
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} |
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if ($info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] > 0) { |
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$info['video']['pixel_aspect_ratio'] = (float) $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] / $info['ogg']['pageheader']['theora']['pixel_aspect_denominator']; |
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} |
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$info['warning'][] = 'Ogg Theora (v3) not fully supported in this version of getID3 ['.$this->getid3->version().'] -- bitrate, playtime and all audio data are currently unavailable'; |
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} elseif (substr($filedata, 0, 8) == "fishead\x00") { |
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// Ogg Skeleton version 3.0 Format Specification |
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// http://xiph.org/ogg/doc/skeleton.html |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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$filedataoffset += 2; |
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$info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); |
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$filedataoffset += 2; |
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$info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20)); |
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$filedataoffset += 20; |
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$info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor']; |
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$info['ogg']['skeleton']['fishead']['presentationtime'] = $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator']; |
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$info['ogg']['skeleton']['fishead']['basetime'] = $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']; |
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$info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc']; |
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$counter = 0; |
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do { |
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$oggpageinfo = $this->ParseOggPageHeader(); |
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo; |
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$filedata = $this->fread($oggpageinfo['page_length']); |
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$this->fseek($oggpageinfo['page_end_offset']); |
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if (substr($filedata, 0, 8) == "fisbone\x00") { |
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213 |
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$filedataoffset = 8; |
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$info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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$info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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218 |
$filedataoffset += 4; |
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$info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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220 |
$filedataoffset += 4; |
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$info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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$filedataoffset += 8; |
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$info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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224 |
$filedataoffset += 8; |
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$info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
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226 |
$filedataoffset += 8; |
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$info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
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$filedataoffset += 4; |
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229 |
$info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
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$filedataoffset += 1; |
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231 |
$info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3); |
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232 |
$filedataoffset += 3; |
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233 |
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234 |
} elseif (substr($filedata, 1, 6) == 'theora') { |
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235 |
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5
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236 |
$info['video']['dataformat'] = 'theora1'; |
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237 |
$info['error'][] = 'Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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238 |
//break; |
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} elseif (substr($filedata, 1, 6) == 'vorbis') { |
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$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo); |
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} else { |
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$info['error'][] = 'unexpected'; |
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//break; |
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} |
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248 |
//} while ($oggpageinfo['page_seqno'] == 0); |
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249 |
} while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00")); |
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250 |
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251 |
$this->fseek($oggpageinfo['page_start_offset']); |
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252 |
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253 |
$info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']'; |
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254 |
//return false; |
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255 |
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256 |
} else { |
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257 |
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258 |
$info['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found "'.substr($filedata, 0, 8).'"'; |
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259 |
unset($info['ogg']); |
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260 |
unset($info['mime_type']); |
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261 |
return false; |
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262 |
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263 |
} |
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264 |
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265 |
// Page 2 - Comment Header |
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266 |
$oggpageinfo = $this->ParseOggPageHeader(); |
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267 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
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268 |
|
|
|
269 |
switch ($info['audio']['dataformat']) { |
|
|
270 |
case 'vorbis': |
|
|
271 |
$filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
|
|
272 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); |
|
|
273 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' |
|
|
274 |
|
|
|
275 |
$this->ParseVorbisComments(); |
|
|
276 |
break; |
|
|
277 |
|
|
|
278 |
case 'flac': |
|
|
279 |
$flac = new getid3_flac($this->getid3); |
|
|
280 |
if (!$flac->parseMETAdata()) { |
|
|
281 |
$info['error'][] = 'Failed to parse FLAC headers'; |
|
|
282 |
return false; |
|
|
283 |
} |
|
|
284 |
unset($flac); |
|
|
285 |
break; |
|
|
286 |
|
|
|
287 |
case 'speex': |
|
|
288 |
$this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); |
|
|
289 |
$this->ParseVorbisComments(); |
|
|
290 |
break; |
|
|
291 |
} |
|
|
292 |
|
|
|
293 |
|
|
|
294 |
// Last Page - Number of Samples |
|
|
295 |
if (!getid3_lib::intValueSupported($info['avdataend'])) { |
|
|
296 |
|
|
|
297 |
$info['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)'; |
|
|
298 |
|
|
|
299 |
} else { |
|
|
300 |
|
|
|
301 |
$this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0)); |
|
|
302 |
$LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size())); |
|
|
303 |
if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { |
|
|
304 |
$this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO'))); |
|
|
305 |
$info['avdataend'] = $this->ftell(); |
|
|
306 |
$info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader(); |
|
|
307 |
$info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position']; |
|
|
308 |
if ($info['ogg']['samples'] == 0) { |
|
|
309 |
$info['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; |
|
|
310 |
return false; |
|
|
311 |
} |
|
|
312 |
if (!empty($info['audio']['sample_rate'])) { |
|
|
313 |
$info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / ($info['ogg']['samples'] / $info['audio']['sample_rate']); |
|
|
314 |
} |
|
|
315 |
} |
|
|
316 |
|
|
|
317 |
} |
|
|
318 |
|
|
|
319 |
if (!empty($info['ogg']['bitrate_average'])) { |
|
|
320 |
$info['audio']['bitrate'] = $info['ogg']['bitrate_average']; |
|
|
321 |
} elseif (!empty($info['ogg']['bitrate_nominal'])) { |
|
|
322 |
$info['audio']['bitrate'] = $info['ogg']['bitrate_nominal']; |
|
|
323 |
} elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) { |
|
|
324 |
$info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2; |
|
|
325 |
} |
|
|
326 |
if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) { |
|
|
327 |
if ($info['audio']['bitrate'] == 0) { |
|
|
328 |
$info['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; |
|
|
329 |
return false; |
|
|
330 |
} |
|
|
331 |
$info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']); |
|
|
332 |
} |
|
|
333 |
|
|
|
334 |
if (isset($info['ogg']['vendor'])) { |
|
|
335 |
$info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']); |
|
|
336 |
|
|
|
337 |
// Vorbis only |
|
|
338 |
if ($info['audio']['dataformat'] == 'vorbis') { |
|
|
339 |
|
|
|
340 |
// Vorbis 1.0 starts with Xiph.Org |
|
|
341 |
if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) { |
|
|
342 |
|
|
|
343 |
if ($info['audio']['bitrate_mode'] == 'abr') { |
|
|
344 |
|
|
|
345 |
// Set -b 128 on abr files |
|
|
346 |
$info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000); |
|
|
347 |
|
|
|
348 |
} elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) { |
|
|
349 |
// Set -q N on vbr files |
|
|
350 |
$info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']); |
|
|
351 |
|
|
|
352 |
} |
|
|
353 |
} |
|
|
354 |
|
|
|
355 |
if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) { |
|
|
356 |
$info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps'; |
|
|
357 |
} |
|
|
358 |
} |
|
|
359 |
} |
|
|
360 |
|
|
|
361 |
return true; |
|
|
362 |
} |
|
|
363 |
|
|
|
364 |
public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) { |
|
|
365 |
$info = &$this->getid3->info; |
|
|
366 |
$info['audio']['dataformat'] = 'vorbis'; |
|
|
367 |
$info['audio']['lossless'] = false; |
|
|
368 |
|
|
|
369 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
370 |
$filedataoffset += 1; |
|
|
371 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' |
|
|
372 |
$filedataoffset += 6; |
|
|
373 |
$info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
374 |
$filedataoffset += 4; |
|
|
375 |
$info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
376 |
$filedataoffset += 1; |
|
|
377 |
$info['audio']['channels'] = $info['ogg']['numberofchannels']; |
|
|
378 |
$info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
379 |
$filedataoffset += 4; |
|
|
380 |
if ($info['ogg']['samplerate'] == 0) { |
|
|
381 |
$info['error'][] = 'Corrupt Ogg file: sample rate == zero'; |
|
|
382 |
return false; |
|
|
383 |
} |
|
|
384 |
$info['audio']['sample_rate'] = $info['ogg']['samplerate']; |
|
|
385 |
$info['ogg']['samples'] = 0; // filled in later |
|
|
386 |
$info['ogg']['bitrate_average'] = 0; // filled in later |
|
|
387 |
$info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
388 |
$filedataoffset += 4; |
|
|
389 |
$info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
390 |
$filedataoffset += 4; |
|
|
391 |
$info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
392 |
$filedataoffset += 4; |
|
|
393 |
$info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); |
|
|
394 |
$info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); |
|
|
395 |
$info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet |
|
|
396 |
|
|
|
397 |
$info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr |
|
|
398 |
if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) { |
|
|
399 |
unset($info['ogg']['bitrate_max']); |
|
|
400 |
$info['audio']['bitrate_mode'] = 'abr'; |
|
|
401 |
} |
|
|
402 |
if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { |
|
|
403 |
unset($info['ogg']['bitrate_nominal']); |
|
|
404 |
} |
|
|
405 |
if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) { |
|
|
406 |
unset($info['ogg']['bitrate_min']); |
|
|
407 |
$info['audio']['bitrate_mode'] = 'abr'; |
|
|
408 |
} |
|
|
409 |
return true; |
|
|
410 |
} |
|
|
411 |
|
|
|
412 |
public function ParseOggPageHeader() { |
|
|
413 |
// http://xiph.org/ogg/vorbis/doc/framing.html |
|
|
414 |
$oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file |
|
|
415 |
|
|
|
416 |
$filedata = $this->fread($this->getid3->fread_buffer_size()); |
|
|
417 |
$filedataoffset = 0; |
|
|
418 |
while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { |
|
|
419 |
if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) { |
|
|
420 |
// should be found before here |
|
|
421 |
return false; |
|
|
422 |
} |
|
|
423 |
if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { |
|
|
424 |
if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) { |
|
|
425 |
// get some more data, unless eof, in which case fail |
|
|
426 |
return false; |
|
|
427 |
} |
|
|
428 |
} |
|
|
429 |
} |
|
|
430 |
$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' |
|
|
431 |
|
|
|
432 |
$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
433 |
$filedataoffset += 1; |
|
|
434 |
$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
435 |
$filedataoffset += 1; |
|
|
436 |
$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet |
|
|
437 |
$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) |
|
|
438 |
$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos) |
|
|
439 |
|
|
|
440 |
$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); |
|
|
441 |
$filedataoffset += 8; |
|
|
442 |
$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
443 |
$filedataoffset += 4; |
|
|
444 |
$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
445 |
$filedataoffset += 4; |
|
|
446 |
$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); |
|
|
447 |
$filedataoffset += 4; |
|
|
448 |
$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
449 |
$filedataoffset += 1; |
|
|
450 |
$oggheader['page_length'] = 0; |
|
|
451 |
for ($i = 0; $i < $oggheader['page_segments']; $i++) { |
|
|
452 |
$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); |
|
|
453 |
$filedataoffset += 1; |
|
|
454 |
$oggheader['page_length'] += $oggheader['segment_table'][$i]; |
|
|
455 |
} |
|
|
456 |
$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset; |
|
|
457 |
$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length']; |
|
|
458 |
$this->fseek($oggheader['header_end_offset']); |
|
|
459 |
|
|
|
460 |
return $oggheader; |
|
|
461 |
} |
|
|
462 |
|
|
|
463 |
// http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005 |
|
|
464 |
public function ParseVorbisComments() { |
|
|
465 |
$info = &$this->getid3->info; |
|
|
466 |
|
|
|
467 |
$OriginalOffset = $this->ftell(); |
|
|
468 |
$commentdataoffset = 0; |
|
|
469 |
$VorbisCommentPage = 1; |
|
|
470 |
|
|
|
471 |
switch ($info['audio']['dataformat']) { |
|
|
472 |
case 'vorbis': |
|
|
473 |
case 'speex': |
|
|
474 |
$CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block |
|
|
475 |
$this->fseek($CommentStartOffset); |
|
|
476 |
$commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; |
|
|
477 |
$commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); |
|
|
478 |
|
|
|
479 |
if ($info['audio']['dataformat'] == 'vorbis') { |
|
|
480 |
$commentdataoffset += (strlen('vorbis') + 1); |
|
|
481 |
} |
|
|
482 |
break; |
|
|
483 |
|
|
|
484 |
case 'flac': |
|
|
485 |
$CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4; |
|
|
486 |
$this->fseek($CommentStartOffset); |
|
|
487 |
$commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']); |
|
|
488 |
break; |
|
|
489 |
|
|
|
490 |
default: |
|
|
491 |
return false; |
|
|
492 |
} |
|
|
493 |
|
|
|
494 |
$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
|
495 |
$commentdataoffset += 4; |
|
|
496 |
|
|
|
497 |
$info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); |
|
|
498 |
$commentdataoffset += $VendorSize; |
|
|
499 |
|
|
|
500 |
$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
|
501 |
$commentdataoffset += 4; |
|
|
502 |
$info['avdataoffset'] = $CommentStartOffset + $commentdataoffset; |
|
|
503 |
|
|
|
504 |
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); |
|
|
505 |
$ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw']; |
|
|
506 |
for ($i = 0; $i < $CommentsCount; $i++) { |
|
|
507 |
|
|
|
508 |
$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; |
|
|
509 |
|
|
|
510 |
if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) { |
|
|
511 |
if ($oggpageinfo = $this->ParseOggPageHeader()) { |
|
|
512 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
|
|
513 |
|
|
|
514 |
$VorbisCommentPage++; |
|
|
515 |
|
|
|
516 |
// First, save what we haven't read yet |
|
|
517 |
$AsYetUnusedData = substr($commentdata, $commentdataoffset); |
|
|
518 |
|
|
|
519 |
// Then take that data off the end |
|
|
520 |
$commentdata = substr($commentdata, 0, $commentdataoffset); |
|
|
521 |
|
|
|
522 |
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
|
523 |
$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
|
524 |
$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
|
525 |
|
|
|
526 |
// Finally, stick the unused data back on the end |
|
|
527 |
$commentdata .= $AsYetUnusedData; |
|
|
528 |
|
|
|
529 |
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
|
|
530 |
$commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1)); |
|
|
531 |
} |
|
|
532 |
|
|
|
533 |
} |
|
|
534 |
$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); |
|
|
535 |
|
|
|
536 |
// replace avdataoffset with position just after the last vorbiscomment |
|
|
537 |
$info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4; |
|
|
538 |
|
|
|
539 |
$commentdataoffset += 4; |
|
|
540 |
while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) { |
|
|
541 |
if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) { |
|
|
542 |
$info['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments'; |
|
|
543 |
break 2; |
|
|
544 |
} |
|
|
545 |
|
|
|
546 |
$VorbisCommentPage++; |
|
|
547 |
|
|
|
548 |
$oggpageinfo = $this->ParseOggPageHeader(); |
|
|
549 |
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; |
|
|
550 |
|
|
|
551 |
// First, save what we haven't read yet |
|
|
552 |
$AsYetUnusedData = substr($commentdata, $commentdataoffset); |
|
|
553 |
|
|
|
554 |
// Then take that data off the end |
|
|
555 |
$commentdata = substr($commentdata, 0, $commentdataoffset); |
|
|
556 |
|
|
|
557 |
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
|
558 |
$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
|
559 |
$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); |
|
|
560 |
|
|
|
561 |
// Finally, stick the unused data back on the end |
|
|
562 |
$commentdata .= $AsYetUnusedData; |
|
|
563 |
|
|
|
564 |
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); |
|
|
565 |
if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) { |
|
|
566 |
$info['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
|
|
567 |
break; |
|
|
568 |
} |
|
|
569 |
$readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1); |
|
|
570 |
if ($readlength <= 0) { |
|
|
571 |
$info['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell(); |
|
|
572 |
break; |
|
|
573 |
} |
|
|
574 |
$commentdata .= $this->fread($readlength); |
|
|
575 |
|
|
|
576 |
//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; |
|
|
577 |
} |
|
|
578 |
$ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset; |
|
|
579 |
$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']); |
|
|
580 |
$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size']; |
|
|
581 |
|
|
|
582 |
if (!$commentstring) { |
|
|
583 |
|
|
|
584 |
// no comment? |
|
|
585 |
$info['warning'][] = 'Blank Ogg comment ['.$i.']'; |
|
|
586 |
|
|
|
587 |
} elseif (strstr($commentstring, '=')) { |
|
|
588 |
|
|
|
589 |
$commentexploded = explode('=', $commentstring, 2); |
|
|
590 |
$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]); |
|
|
591 |
$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : ''); |
|
|
592 |
|
|
|
593 |
if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') { |
|
|
594 |
|
|
|
595 |
// http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE |
|
|
596 |
// 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. |
|
|
597 |
// http://flac.sourceforge.net/format.html#metadata_block_picture |
|
|
598 |
$flac = new getid3_flac($this->getid3); |
|
|
599 |
$flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value'])); |
|
|
600 |
$flac->parsePICTURE(); |
|
|
601 |
$info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0]; |
|
|
602 |
unset($flac); |
|
|
603 |
|
|
|
604 |
} elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') { |
|
|
605 |
|
|
|
606 |
$data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']); |
|
|
607 |
$this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure'); |
|
|
608 |
/** @todo use 'coverartmime' where available */ |
|
|
609 |
$imageinfo = getid3_lib::GetDataImageSize($data); |
|
|
610 |
if ($imageinfo === false || !isset($imageinfo['mime'])) { |
|
|
611 |
$this->warning('COVERART vorbiscomment tag contains invalid image'); |
|
|
612 |
continue; |
|
|
613 |
} |
|
|
614 |
|
|
|
615 |
$ogg = new self($this->getid3); |
|
|
616 |
$ogg->setStringMode($data); |
|
|
617 |
$info['ogg']['comments']['picture'][] = array( |
|
|
618 |
'image_mime' => $imageinfo['mime'], |
|
|
619 |
'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']), |
|
|
620 |
); |
|
|
621 |
unset($ogg); |
|
|
622 |
|
|
|
623 |
} else { |
|
|
624 |
|
|
|
625 |
$info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value']; |
|
|
626 |
|
|
|
627 |
} |
|
|
628 |
|
|
|
629 |
} else { |
|
|
630 |
|
|
|
631 |
$info['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; |
|
|
632 |
|
|
|
633 |
} |
|
|
634 |
unset($ThisFileInfo_ogg_comments_raw[$i]); |
|
|
635 |
} |
|
|
636 |
unset($ThisFileInfo_ogg_comments_raw); |
|
|
637 |
|
|
|
638 |
|
|
|
639 |
// Replay Gain Adjustment |
|
|
640 |
// http://privatewww.essex.ac.uk/~djmrob/replaygain/ |
|
|
641 |
if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) { |
|
|
642 |
foreach ($info['ogg']['comments'] as $index => $commentvalue) { |
|
|
643 |
switch ($index) { |
|
|
644 |
case 'rg_audiophile': |
|
|
645 |
case 'replaygain_album_gain': |
|
|
646 |
$info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0]; |
|
|
647 |
unset($info['ogg']['comments'][$index]); |
|
|
648 |
break; |
|
|
649 |
|
|
|
650 |
case 'rg_radio': |
|
|
651 |
case 'replaygain_track_gain': |
|
|
652 |
$info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0]; |
|
|
653 |
unset($info['ogg']['comments'][$index]); |
|
|
654 |
break; |
|
|
655 |
|
|
|
656 |
case 'replaygain_album_peak': |
|
|
657 |
$info['replay_gain']['album']['peak'] = (double) $commentvalue[0]; |
|
|
658 |
unset($info['ogg']['comments'][$index]); |
|
|
659 |
break; |
|
|
660 |
|
|
|
661 |
case 'rg_peak': |
|
|
662 |
case 'replaygain_track_peak': |
|
|
663 |
$info['replay_gain']['track']['peak'] = (double) $commentvalue[0]; |
|
|
664 |
unset($info['ogg']['comments'][$index]); |
|
|
665 |
break; |
|
|
666 |
|
|
|
667 |
case 'replaygain_reference_loudness': |
|
|
668 |
$info['replay_gain']['reference_volume'] = (double) $commentvalue[0]; |
|
|
669 |
unset($info['ogg']['comments'][$index]); |
|
|
670 |
break; |
|
|
671 |
|
|
|
672 |
default: |
|
|
673 |
// do nothing |
|
|
674 |
break; |
|
|
675 |
} |
|
|
676 |
} |
|
|
677 |
} |
|
|
678 |
|
|
|
679 |
$this->fseek($OriginalOffset); |
|
|
680 |
|
|
|
681 |
return true; |
|
|
682 |
} |
|
|
683 |
|
|
|
684 |
public static function SpeexBandModeLookup($mode) { |
|
|
685 |
static $SpeexBandModeLookup = array(); |
|
|
686 |
if (empty($SpeexBandModeLookup)) { |
|
|
687 |
$SpeexBandModeLookup[0] = 'narrow'; |
|
|
688 |
$SpeexBandModeLookup[1] = 'wide'; |
|
|
689 |
$SpeexBandModeLookup[2] = 'ultra-wide'; |
|
|
690 |
} |
|
|
691 |
return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); |
|
|
692 |
} |
|
|
693 |
|
|
|
694 |
|
|
|
695 |
public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) { |
|
|
696 |
for ($i = 0; $i < $SegmentNumber; $i++) { |
|
|
697 |
$segmentlength = 0; |
|
|
698 |
foreach ($OggInfoArray['segment_table'] as $key => $value) { |
|
|
699 |
$segmentlength += $value; |
|
|
700 |
if ($value < 255) { |
|
|
701 |
break; |
|
|
702 |
} |
|
|
703 |
} |
|
|
704 |
} |
|
|
705 |
return $segmentlength; |
|
|
706 |
} |
|
|
707 |
|
|
|
708 |
|
|
|
709 |
public static function get_quality_from_nominal_bitrate($nominal_bitrate) { |
|
|
710 |
|
|
|
711 |
// decrease precision |
|
|
712 |
$nominal_bitrate = $nominal_bitrate / 1000; |
|
|
713 |
|
|
|
714 |
if ($nominal_bitrate < 128) { |
|
|
715 |
// q-1 to q4 |
|
|
716 |
$qval = ($nominal_bitrate - 64) / 16; |
|
|
717 |
} elseif ($nominal_bitrate < 256) { |
|
|
718 |
// q4 to q8 |
|
|
719 |
$qval = $nominal_bitrate / 32; |
|
|
720 |
} elseif ($nominal_bitrate < 320) { |
|
|
721 |
// q8 to q9 |
|
|
722 |
$qval = ($nominal_bitrate + 256) / 64; |
|
|
723 |
} else { |
|
|
724 |
// q9 to q10 |
|
|
725 |
$qval = ($nominal_bitrate + 1300) / 180; |
|
|
726 |
} |
|
|
727 |
//return $qval; // 5.031324 |
|
|
728 |
//return intval($qval); // 5 |
|
|
729 |
return round($qval, 1); // 5 or 4.9 |
|
|
730 |
} |
|
|
731 |
|
|
5
|
732 |
public static function TheoraColorSpace($colorspace_id) { |
|
|
733 |
// http://www.theora.org/doc/Theora.pdf (table 6.3) |
|
|
734 |
static $TheoraColorSpaceLookup = array(); |
|
|
735 |
if (empty($TheoraColorSpaceLookup)) { |
|
|
736 |
$TheoraColorSpaceLookup[0] = 'Undefined'; |
|
|
737 |
$TheoraColorSpaceLookup[1] = 'Rec. 470M'; |
|
|
738 |
$TheoraColorSpaceLookup[2] = 'Rec. 470BG'; |
|
|
739 |
$TheoraColorSpaceLookup[3] = 'Reserved'; |
|
|
740 |
} |
|
|
741 |
return (isset($TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null); |
|
|
742 |
} |
|
|
743 |
|
|
|
744 |
public static function TheoraPixelFormat($pixelformat_id) { |
|
|
745 |
// http://www.theora.org/doc/Theora.pdf (table 6.4) |
|
|
746 |
static $TheoraPixelFormatLookup = array(); |
|
|
747 |
if (empty($TheoraPixelFormatLookup)) { |
|
|
748 |
$TheoraPixelFormatLookup[0] = '4:2:0'; |
|
|
749 |
$TheoraPixelFormatLookup[1] = 'Reserved'; |
|
|
750 |
$TheoraPixelFormatLookup[2] = '4:2:2'; |
|
|
751 |
$TheoraPixelFormatLookup[3] = '4:4:4'; |
|
|
752 |
} |
|
|
753 |
return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null); |
|
|
754 |
} |
|
|
755 |
|
|
|
756 |
} |