$this->error('Invalid channel count in opus header (must not be zero)');

[500] Fix | Delete

return false;

[501] Fix | Delete

}

[502] Fix | Delete

[503] Fix | Delete

$info['ogg']['pageheader']['opus']['pre_skip'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));

[504] Fix | Delete

$filedataoffset += 2;

[505] Fix | Delete

[506] Fix | Delete

$info['ogg']['pageheader']['opus']['input_sample_rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));

[507] Fix | Delete

$filedataoffset += 4;

[508] Fix | Delete

[509] Fix | Delete

//$info['ogg']['pageheader']['opus']['output_gain'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));

[510] Fix | Delete

//$filedataoffset += 2;

[511] Fix | Delete

[512] Fix | Delete

//$info['ogg']['pageheader']['opus']['channel_mapping_family'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));

[513] Fix | Delete

//$filedataoffset += 1;

[514] Fix | Delete

[515] Fix | Delete

$info['opus']['opus_version'] = $info['ogg']['pageheader']['opus']['version'];

[516] Fix | Delete

$info['opus']['sample_rate_input'] = $info['ogg']['pageheader']['opus']['input_sample_rate'];

[517] Fix | Delete

$info['opus']['out_channel_count'] = $info['ogg']['pageheader']['opus']['out_channel_count'];

[518] Fix | Delete

[519] Fix | Delete

$info['audio']['channels'] = $info['opus']['out_channel_count'];

[520] Fix | Delete

$info['audio']['sample_rate_input'] = $info['opus']['sample_rate_input'];

[521] Fix | Delete

$info['audio']['sample_rate'] = 48000; // "All Opus audio is coded at 48 kHz, and should also be decoded at 48 kHz for playback (unless the target hardware does not support this sampling rate). However, this field may be used to resample the audio back to the original sampling rate, for example, when saving the output to a file." -- https://mf4.xiph.org/jenkins/view/opus/job/opusfile-unix/ws/doc/html/structOpusHead.html

[522] Fix | Delete

return true;

[523] Fix | Delete

}

[524] Fix | Delete

[525] Fix | Delete

/**

[526] Fix | Delete

* @return array|false

[527] Fix | Delete

*/

[528] Fix | Delete

public function ParseOggPageHeader() {

[529] Fix | Delete

// http://xiph.org/ogg/vorbis/doc/framing.html

[530] Fix | Delete

$oggheader = array();

[531] Fix | Delete

$oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file

[532] Fix | Delete

[533] Fix | Delete

$filedata = $this->fread($this->getid3->fread_buffer_size());

[534] Fix | Delete

$filedataoffset = 0;

[535] Fix | Delete

while (substr($filedata, $filedataoffset++, 4) != 'OggS') {

[536] Fix | Delete

if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) {

[537] Fix | Delete

// should be found before here

[538] Fix | Delete

return false;

[539] Fix | Delete

}

[540] Fix | Delete

if (($filedataoffset + 28) > strlen($filedata)) {

[541] Fix | Delete

if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === '')) {

[542] Fix | Delete

// get some more data, unless eof, in which case fail

[543] Fix | Delete

return false;

[544] Fix | Delete

}

[545] Fix | Delete

}

[546] Fix | Delete

}

[547] Fix | Delete

$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'

[548] Fix | Delete

[549] Fix | Delete

$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));

[550] Fix | Delete

$filedataoffset += 1;

[551] Fix | Delete

$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));

[552] Fix | Delete

$filedataoffset += 1;

[553] Fix | Delete

$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet

[554] Fix | Delete

$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)

[555] Fix | Delete

$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)

[556] Fix | Delete

[557] Fix | Delete

$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));

[558] Fix | Delete

$filedataoffset += 8;

[559] Fix | Delete

$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));

[560] Fix | Delete

$filedataoffset += 4;

[561] Fix | Delete

$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));

[562] Fix | Delete

$filedataoffset += 4;

[563] Fix | Delete

$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));

[564] Fix | Delete

$filedataoffset += 4;

[565] Fix | Delete

$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));

[566] Fix | Delete

$filedataoffset += 1;

[567] Fix | Delete

$oggheader['page_length'] = 0;

[568] Fix | Delete

for ($i = 0; $i < $oggheader['page_segments']; $i++) {

[569] Fix | Delete

$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));

[570] Fix | Delete

$filedataoffset += 1;

[571] Fix | Delete

$oggheader['page_length'] += $oggheader['segment_table'][$i];

[572] Fix | Delete

}

[573] Fix | Delete

$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;

[574] Fix | Delete

$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];

[575] Fix | Delete

$this->fseek($oggheader['header_end_offset']);

[576] Fix | Delete

[577] Fix | Delete

return $oggheader;

[578] Fix | Delete

}

[579] Fix | Delete

[580] Fix | Delete

/**

[581] Fix | Delete

* @link http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005

[582] Fix | Delete

*

[583] Fix | Delete

* @return bool

[584] Fix | Delete

*/

[585] Fix | Delete

public function ParseVorbisComments() {

[586] Fix | Delete

$info = &$this->getid3->info;

[587] Fix | Delete

[588] Fix | Delete

$OriginalOffset = $this->ftell();

[589] Fix | Delete

$commentdata = null;

[590] Fix | Delete

$commentdataoffset = 0;

[591] Fix | Delete

$VorbisCommentPage = 1;

[592] Fix | Delete

$CommentStartOffset = 0;

[593] Fix | Delete

[594] Fix | Delete

switch ($info['audio']['dataformat']) {

[595] Fix | Delete

case 'vorbis':

[596] Fix | Delete

case 'speex':

[597] Fix | Delete

case 'opus':

[598] Fix | Delete

$CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block

[599] Fix | Delete

$this->fseek($CommentStartOffset);

[600] Fix | Delete

$commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];

[601] Fix | Delete

$commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);

[602] Fix | Delete

[603] Fix | Delete

if ($info['audio']['dataformat'] == 'vorbis') {

[604] Fix | Delete

$commentdataoffset += (strlen('vorbis') + 1);

[605] Fix | Delete

}

[606] Fix | Delete

else if ($info['audio']['dataformat'] == 'opus') {

[607] Fix | Delete

$commentdataoffset += strlen('OpusTags');

[608] Fix | Delete

}

[609] Fix | Delete

[610] Fix | Delete

break;

[611] Fix | Delete

[612] Fix | Delete

case 'flac':

[613] Fix | Delete

$CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4;

[614] Fix | Delete

$this->fseek($CommentStartOffset);

[615] Fix | Delete

$commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']);

[616] Fix | Delete

break;

[617] Fix | Delete

[618] Fix | Delete

default:

[619] Fix | Delete

return false;

[620] Fix | Delete

}

[621] Fix | Delete

[622] Fix | Delete

$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));

[623] Fix | Delete

$commentdataoffset += 4;

[624] Fix | Delete

[625] Fix | Delete

$info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);

[626] Fix | Delete

$commentdataoffset += $VendorSize;

[627] Fix | Delete

[628] Fix | Delete

$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));

[629] Fix | Delete

$commentdataoffset += 4;

[630] Fix | Delete

$info['avdataoffset'] = $CommentStartOffset + $commentdataoffset;

[631] Fix | Delete

[632] Fix | Delete

$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');

[633] Fix | Delete

$ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw'];

[634] Fix | Delete

for ($i = 0; $i < $CommentsCount; $i++) {

[635] Fix | Delete

[636] Fix | Delete

if ($i >= 10000) {

[637] Fix | Delete

// https://github.com/owncloud/music/issues/212#issuecomment-43082336

[638] Fix | Delete

$this->warning('Unexpectedly large number ('.$CommentsCount.') of Ogg comments - breaking after reading '.$i.' comments');

[639] Fix | Delete

break;

[640] Fix | Delete

}

[641] Fix | Delete

[642] Fix | Delete

$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;

[643] Fix | Delete

[644] Fix | Delete

if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {

[645] Fix | Delete

if ($oggpageinfo = $this->ParseOggPageHeader()) {

[646] Fix | Delete

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

[647] Fix | Delete

[648] Fix | Delete

$VorbisCommentPage++;

[649] Fix | Delete

[650] Fix | Delete

// First, save what we haven't read yet

[651] Fix | Delete

$AsYetUnusedData = substr($commentdata, $commentdataoffset);

[652] Fix | Delete

[653] Fix | Delete

// Then take that data off the end

[654] Fix | Delete

$commentdata = substr($commentdata, 0, $commentdataoffset);

[655] Fix | Delete

[656] Fix | Delete

// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct

[657] Fix | Delete

$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);

[658] Fix | Delete

$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);

[659] Fix | Delete

[660] Fix | Delete

// Finally, stick the unused data back on the end

[661] Fix | Delete

$commentdata .= $AsYetUnusedData;

[662] Fix | Delete

[663] Fix | Delete

//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);

[664] Fix | Delete

$commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1));

[665] Fix | Delete

}

[666] Fix | Delete

[667] Fix | Delete

}

[668] Fix | Delete

$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));

[669] Fix | Delete

[670] Fix | Delete

// replace avdataoffset with position just after the last vorbiscomment

[671] Fix | Delete

$info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;

[672] Fix | Delete

[673] Fix | Delete

$commentdataoffset += 4;

[674] Fix | Delete

while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) {

[675] Fix | Delete

if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {

[676] Fix | Delete

$this->warning('Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments');

[677] Fix | Delete

break 2;

[678] Fix | Delete

}

[679] Fix | Delete

[680] Fix | Delete

$VorbisCommentPage++;

[681] Fix | Delete

[682] Fix | Delete

if ($oggpageinfo = $this->ParseOggPageHeader()) {

[683] Fix | Delete

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

[684] Fix | Delete

[685] Fix | Delete

// First, save what we haven't read yet

[686] Fix | Delete

$AsYetUnusedData = substr($commentdata, $commentdataoffset);

[687] Fix | Delete

[688] Fix | Delete

// Then take that data off the end

[689] Fix | Delete

$commentdata = substr($commentdata, 0, $commentdataoffset);

[690] Fix | Delete

[691] Fix | Delete

// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct

[692] Fix | Delete

$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);

[693] Fix | Delete

$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);

[694] Fix | Delete

[695] Fix | Delete

// Finally, stick the unused data back on the end

[696] Fix | Delete

$commentdata .= $AsYetUnusedData;

[697] Fix | Delete

[698] Fix | Delete

//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);

[699] Fix | Delete

if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) {

[700] Fix | Delete

$this->warning('undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());

[701] Fix | Delete

break;

[702] Fix | Delete

}

[703] Fix | Delete

$readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1);

[704] Fix | Delete

if ($readlength <= 0) {

[705] Fix | Delete

$this->warning('invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());

[706] Fix | Delete

break;

[707] Fix | Delete

}

[708] Fix | Delete

$commentdata .= $this->fread($readlength);

[709] Fix | Delete

[710] Fix | Delete

//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];

[711] Fix | Delete

} else {

[712] Fix | Delete

$this->warning('failed to ParseOggPageHeader() at offset '.$this->ftell());

[713] Fix | Delete

break;

[714] Fix | Delete

}

[715] Fix | Delete

}

[716] Fix | Delete

$ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset;

[717] Fix | Delete

$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);

[718] Fix | Delete

$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];

[719] Fix | Delete

[720] Fix | Delete

if (!$commentstring) {

[721] Fix | Delete

[722] Fix | Delete

// no comment?

[723] Fix | Delete

$this->warning('Blank Ogg comment ['.$i.']');

[724] Fix | Delete

[725] Fix | Delete

} elseif (strstr($commentstring, '=')) {

[726] Fix | Delete

[727] Fix | Delete

$commentexploded = explode('=', $commentstring, 2);

[728] Fix | Delete

$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]);

[729] Fix | Delete

$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : '');

[730] Fix | Delete

[731] Fix | Delete

if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') {

[732] Fix | Delete

[733] Fix | Delete

// http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE

[734] Fix | Delete

// 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.

[735] Fix | Delete

// http://flac.sourceforge.net/format.html#metadata_block_picture

[736] Fix | Delete

$flac = new getid3_flac($this->getid3);

[737] Fix | Delete

$flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']));

[738] Fix | Delete

$flac->parsePICTURE();

[739] Fix | Delete

$info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0];

[740] Fix | Delete

unset($flac);

[741] Fix | Delete

[742] Fix | Delete

} elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') {

[743] Fix | Delete

[744] Fix | Delete

$data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);

[745] Fix | Delete

$this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure');

[746] Fix | Delete

/** @todo use 'coverartmime' where available */

[747] Fix | Delete

$imageinfo = getid3_lib::GetDataImageSize($data);

[748] Fix | Delete

if ($imageinfo === false || !isset($imageinfo['mime'])) {

[749] Fix | Delete

$this->warning('COVERART vorbiscomment tag contains invalid image');

[750] Fix | Delete

continue;

[751] Fix | Delete

}

[752] Fix | Delete

[753] Fix | Delete

$ogg = new self($this->getid3);

[754] Fix | Delete

$ogg->setStringMode($data);

[755] Fix | Delete

$info['ogg']['comments']['picture'][] = array(

[756] Fix | Delete

'image_mime' => $imageinfo['mime'],

[757] Fix | Delete

'datalength' => strlen($data),

[758] Fix | Delete

'picturetype' => 'cover art',

[759] Fix | Delete

'image_height' => $imageinfo['height'],

[760] Fix | Delete

'image_width' => $imageinfo['width'],

[761] Fix | Delete

'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']),

[762] Fix | Delete

);

[763] Fix | Delete

unset($ogg);

[764] Fix | Delete

[765] Fix | Delete

} else {

[766] Fix | Delete

[767] Fix | Delete

$info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];

[768] Fix | Delete

[769] Fix | Delete

}

[770] Fix | Delete

[771] Fix | Delete

} else {

[772] Fix | Delete

[773] Fix | Delete

$this->warning('[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring);

[774] Fix | Delete

[775] Fix | Delete

}

[776] Fix | Delete

unset($ThisFileInfo_ogg_comments_raw[$i]);

[777] Fix | Delete

}

[778] Fix | Delete

unset($ThisFileInfo_ogg_comments_raw);

[779] Fix | Delete

[780] Fix | Delete

[781] Fix | Delete

// Replay Gain Adjustment

[782] Fix | Delete

// http://privatewww.essex.ac.uk/~djmrob/replaygain/

[783] Fix | Delete

if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) {

[784] Fix | Delete

foreach ($info['ogg']['comments'] as $index => $commentvalue) {

[785] Fix | Delete

switch ($index) {

[786] Fix | Delete

case 'rg_audiophile':

[787] Fix | Delete

case 'replaygain_album_gain':

[788] Fix | Delete

$info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];

[789] Fix | Delete

unset($info['ogg']['comments'][$index]);

[790] Fix | Delete

break;

[791] Fix | Delete

[792] Fix | Delete

case 'rg_radio':

[793] Fix | Delete

case 'replaygain_track_gain':

[794] Fix | Delete

$info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];

[795] Fix | Delete

unset($info['ogg']['comments'][$index]);

[796] Fix | Delete

break;

[797] Fix | Delete

[798] Fix | Delete

case 'replaygain_album_peak':

[799] Fix | Delete

$info['replay_gain']['album']['peak'] = (double) $commentvalue[0];

[800] Fix | Delete

unset($info['ogg']['comments'][$index]);

[801] Fix | Delete

break;

[802] Fix | Delete

[803] Fix | Delete

case 'rg_peak':

[804] Fix | Delete

case 'replaygain_track_peak':

[805] Fix | Delete

$info['replay_gain']['track']['peak'] = (double) $commentvalue[0];

[806] Fix | Delete

unset($info['ogg']['comments'][$index]);

[807] Fix | Delete

break;

[808] Fix | Delete

[809] Fix | Delete

case 'replaygain_reference_loudness':

[810] Fix | Delete

$info['replay_gain']['reference_volume'] = (double) $commentvalue[0];

[811] Fix | Delete

unset($info['ogg']['comments'][$index]);

[812] Fix | Delete

break;

[813] Fix | Delete

[814] Fix | Delete

default:

[815] Fix | Delete

// do nothing

[816] Fix | Delete

break;

[817] Fix | Delete

}

[818] Fix | Delete

}

[819] Fix | Delete

}

[820] Fix | Delete

[821] Fix | Delete

$this->fseek($OriginalOffset);

[822] Fix | Delete

[823] Fix | Delete

return true;

[824] Fix | Delete

}

[825] Fix | Delete

[826] Fix | Delete

/**

[827] Fix | Delete

* @param int $mode

[828] Fix | Delete

*

[829] Fix | Delete

* @return string|null

[830] Fix | Delete

*/

[831] Fix | Delete

public static function SpeexBandModeLookup($mode) {

[832] Fix | Delete

static $SpeexBandModeLookup = array();

[833] Fix | Delete

if (empty($SpeexBandModeLookup)) {

[834] Fix | Delete

$SpeexBandModeLookup[0] = 'narrow';

[835] Fix | Delete

$SpeexBandModeLookup[1] = 'wide';

[836] Fix | Delete

$SpeexBandModeLookup[2] = 'ultra-wide';

[837] Fix | Delete

}

[838] Fix | Delete

return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);

[839] Fix | Delete

}

[840] Fix | Delete

[841] Fix | Delete

/**

[842] Fix | Delete

* @param array $OggInfoArray

[843] Fix | Delete

* @param int $SegmentNumber

[844] Fix | Delete

*

[845] Fix | Delete

* @return int

[846] Fix | Delete

*/

[847] Fix | Delete

public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {

[848] Fix | Delete

$segmentlength = 0;

[849] Fix | Delete

for ($i = 0; $i < $SegmentNumber; $i++) {

[850] Fix | Delete

$segmentlength = 0;

[851] Fix | Delete

foreach ($OggInfoArray['segment_table'] as $key => $value) {

[852] Fix | Delete

$segmentlength += $value;

[853] Fix | Delete

if ($value < 255) {

[854] Fix | Delete

break;

[855] Fix | Delete

}

[856] Fix | Delete

}

[857] Fix | Delete

}

[858] Fix | Delete

return $segmentlength;

[859] Fix | Delete

}

[860] Fix | Delete

[861] Fix | Delete

/**

[862] Fix | Delete

* @param int $nominal_bitrate

[863] Fix | Delete

*

[864] Fix | Delete

* @return float

[865] Fix | Delete

*/

[866] Fix | Delete

public static function get_quality_from_nominal_bitrate($nominal_bitrate) {

[867] Fix | Delete

[868] Fix | Delete

// decrease precision

[869] Fix | Delete

$nominal_bitrate = $nominal_bitrate / 1000;

[870] Fix | Delete

[871] Fix | Delete

if ($nominal_bitrate < 128) {

[872] Fix | Delete

// q-1 to q4

[873] Fix | Delete

$qval = ($nominal_bitrate - 64) / 16;

[874] Fix | Delete

} elseif ($nominal_bitrate < 256) {

[875] Fix | Delete

// q4 to q8

[876] Fix | Delete

$qval = $nominal_bitrate / 32;

[877] Fix | Delete

} elseif ($nominal_bitrate < 320) {

[878] Fix | Delete

// q8 to q9

[879] Fix | Delete

$qval = ($nominal_bitrate + 256) / 64;

[880] Fix | Delete

} else {

[881] Fix | Delete

// q9 to q10

[882] Fix | Delete

$qval = ($nominal_bitrate + 1300) / 180;

[883] Fix | Delete

}

[884] Fix | Delete

//return $qval; // 5.031324

[885] Fix | Delete

//return intval($qval); // 5

[886] Fix | Delete

return round($qval, 1); // 5 or 4.9

[887] Fix | Delete

}

[888] Fix | Delete

[889] Fix | Delete

/**

[890] Fix | Delete

* @param int $colorspace_id

[891] Fix | Delete

*

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* @return string|null

[893] Fix | Delete

*/

[894] Fix | Delete

public static function TheoraColorSpace($colorspace_id) {

[895] Fix | Delete

// http://www.theora.org/doc/Theora.pdf (table 6.3)

[896] Fix | Delete

static $TheoraColorSpaceLookup = array();

[897] Fix | Delete

if (empty($TheoraColorSpaceLookup)) {

[898] Fix | Delete

$TheoraColorSpaceLookup[0] = 'Undefined';

[899] Fix | Delete

$TheoraColorSpaceLookup[1] = 'Rec. 470M';

[900] Fix | Delete

$TheoraColorSpaceLookup[2] = 'Rec. 470BG';

[901] Fix | Delete

$TheoraColorSpaceLookup[3] = 'Reserved';

[902] Fix | Delete

}

[903] Fix | Delete

return (isset($TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null);

[904] Fix | Delete

}

[905] Fix | Delete

[906] Fix | Delete

/**

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* @param int $pixelformat_id

[908] Fix | Delete

*

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* @return string|null

[910] Fix | Delete

*/

[911] Fix | Delete

public static function TheoraPixelFormat($pixelformat_id) {

[912] Fix | Delete

// http://www.theora.org/doc/Theora.pdf (table 6.4)

[913] Fix | Delete

static $TheoraPixelFormatLookup = array();

[914] Fix | Delete

if (empty($TheoraPixelFormatLookup)) {

[915] Fix | Delete

$TheoraPixelFormatLookup[0] = '4:2:0';

[916] Fix | Delete

$TheoraPixelFormatLookup[1] = 'Reserved';

[917] Fix | Delete

$TheoraPixelFormatLookup[2] = '4:2:2';

[918] Fix | Delete

$TheoraPixelFormatLookup[3] = '4:4:4';

[919] Fix | Delete

}

[920] Fix | Delete

return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null);

[921] Fix | Delete

}

[922] Fix | Delete

[923] Fix | Delete

}

[924] Fix | Delete

[925] Fix | Delete